Patent Description:
In currently available drill rig configurations, one or more hydraulic rock drilling machines are arranged on feeder arrangements at outer ends of respective one or more booms that extend from the drill rig. Hoses to provide the feeder arrangement and/or hydraulic rock drilling machine with hydraulic fluid are arranged in reels or other types of hose suspension arrangements that offer flexibility, both for the movement of the hydraulic rock drilling machine with respect to the feeder arrangement, but also for the positioning of the feeder arrangement with respect to the boom.

However, such hose suspension arrangements are often both bulky and exposed to harsh conditions. In many cases the hoses may get tangled up, e.g., against a rock surface, resulting in hose ruptures. This is particularly troublesome when it happens to a hydraulic hose that supports an essential function of the feeder arrangement or the rock drilling machine. In those instances a rupture of hydraulic hose will most likely result in an operational stop.

A drill rig often comprises at least two separate feeders extending from separate booms, each feeder carrying a hydraulic rock drilling machine and the associated hydraulic hose suspension arrangements. A common problem is that these hydraulic hose suspension arrangements may hinder each other, which may further aggravate the above mentioned operational problems or hose ruptures and result in lengthy downtimes of the drill rig. Recent service evaluations indicate that <NUM>% of the downtime of drill rig is due to problems related to the booms feeder arrangements. Further, <NUM>% of the boom/feeder related problems occur due to damages on hydraulic hoses, including external damages and ruptures thereof.

Consequently, there is a need for a solution that reduces problems due to hose entanglement or leaks in the conduits providing the rock drilling machine with hydraulics.

<CIT> discloses a fluid actuated rock drilling apparatus comprising a plurality of flexible pressure fluid hoses to communicate between the drill and a pressure fluid source.

It is an object of the present disclosure to provide a feeder arrangement and drill rig that seeks to mitigate or eliminate all or at least some of the above-discussed drawbacks of present solutions and reduces problems due to hose entanglement or leaks in the conduits.

This and other objects are achieved by means of a feeder arrangement and drill rig as defined in the appended claims. The term exemplary is in the present context to be understood as serving as an optional feature, example or illustration.

According to a first aspect of the present disclosure, a feeder arrangement for a hydraulic rock drilling machine on a drill rig is provided. The feeder arrangement comprises a feed beam with a first beam that comprises a first end block and a second end block at opposite ends thereof, i.e., at opposite ends of the first beam. The feeder arrangement further comprises a first pipe connection extending between the first end block and the second end block, and a rock drilling machine connector including at least a first connector port that is connectable to the rock drilling machine; the rock drilling machine connector being slidably arranged with respect to the first pipe connection. The first pipe connection is comprised in the feed beam and is fluidly connectable to a hydraulic arrangement on the drill rig via a first conduit passing through a first end of the first pipe connection and the first end block. The first pipe connection comprises a first fluid port to a first chamber of the rock drilling machine connector. The first connector port is in fluid connection with the first chamber via the first conduit to connect the rock drilling machine to the hydraulic arrangement on the drill rig and to provide pressurised hydraulic fluid to drive at least one consumer of the hydraulic rock drilling machine.

The disclosed feeder arrangement enables a providing of pressurized hydraulic fluid to the rock drilling machine via internal conduits, e.g., via rigid pipes, inside the feed beam wherein the risk of damages on the conduits caused by external factors is minimized.

In some embodiments, the feeder arrangement further comprises a connection device including at least a first hydraulic fluid port that is connectable to a hydraulic arrangement on the drill rig, and wherein the first chamber of the rock drilling machine connector is in fluid connection with the connection device via the first conduit.

The connection device provides the advantage of enabling simplified hydraulic connectivity, at any connection point along the feed beam, to the hydraulic arrangement on the drill rig.

In some embodiments, the connection device includes a second hydraulic fluid port that is connectable to the hydraulic arrangement on the drill rig and the rock drilling machine connector includes a second connector port that is connectable to the rock drilling machine. The second hydraulic fluid port and the second connector port are fluidly connected via a second conduit passing through a second end of the first pipe connection and the second end block. The first pipe connection comprises a second fluid port that is connected to a second chamber of the rock drilling machine connector. The second conduit provides a return line from at least one consumer of the hydraulic rock drilling machine to the hydraulic arrangement on the drill rig.

This enables the conveying of a return flow without the use of external hoses.

In some embodiments, the first pipe connection comprises at least two parallel pipes extending between the first and second end blocks and providing separate hydraulic conduits via separate rock drilling machine connectors.

The provision of more than one individual pipe offers more conduits for providing or returning hydraulic fluid to or from the rock drilling machine, regardless of if the two ends, or only a first end, of the pipes are utilised to convey fluid.

In some embodiments, the first pipe connection comprises one or more rigid pipes extending between the first and second end blocks.

Thus, a hydraulic feed addressing the problems of hose tangling is provided.

In some embodiments, the rock drilling machine connector is a multi-stage connector also comprising an intermediate connector, wherein the intermediate connector is arranged to enclose a portion of the pipe connection and to slide in the axial direction with respect thereto, and the rock drilling machine connector is arranged to enclose a portion of the intermediate connector and to slide in the axial direction with respect to the intermediate connector; the first fluid port of the pipe connection being connected to the first chamber of the rock drilling machine connector via a first intermediate chamber of the intermediate connector, and the second fluid port of the pipe connection being connected to the second chamber of the rock drilling machine connector via a second intermediate chamber of the intermediate connector.

The described multi-stage connector is advantageous in that it substantially increases the possible movement of the rock drilling machine, between two outer positions close to the respective ends of the first beam. Thereby, short as well as longer drill rods may be used in the feeder arrangement.

In some embodiments of the feeder arrangement the first and the second intermediate chambers of the intermediate connector are separated by a partition, e.g., a piston, arranged circumferentially on the pipe connection, and wherein the first and the second chambers of the rock drilling machine connector are separated by a partition, e.g., a piston, arranged circumferentially on the intermediate connector.

In some embodiments, the feed beam comprises a second beam extending in a longitudinal direction of the first beam, wherein the first beam is arranged in sliding contact with the second beam between a compacted position and an extended position in which it extends away in the longitudinal direction with respect to the second beam. A second pipe connection is arranged alongside the first pipe connection between the first and second end block of the first beam. Optionally, a connection device may be arranged at the second beam and the second pipe connection may be connected to the connection device to connect the hydraulic arrangement on the drill rig to the rock drilling machine, via at least the first conduit.

An extendable feed beam offers many advantages with regard to operational movement of the rock drilling machine in the axial direction. The second pipe connection provides an advantageous manner of combining the advantages of an extendable feed beam with an internal conduction of hydraulic fluid to and from a rock drilling machine.

In some embodiments, a hydraulic pressure source of the hydraulic arrangement on the drill rig is arranged to drive a percussion unit of the rock drilling machine via the first conduit line and wherein a return flow from the percussion unit is connectable via the second conduit line to a tank.

With this specific embodiment no external conduits are needed to drive a percussion unit of the rock drilling machine.

According to a second aspect of the present disclosure, a drill rig is provided. The drill rig comprises a boom and a feeder arrangement according to the first aspect. The drill rig further comprises a hydraulic arrangement including a hydraulic pressure source for feeding a rock drilling machine and a tank. The feeder arrangement is attached to an outer end of the boom and is hydraulically connected to the hydraulic arrangement via the boom.

Other embodiments, examples and advantages of the feeder arrangement and drill rig will be presented and further explained in the detailed description and the appended drawings.

<FIG> discloses a drill rig <NUM>, i.e., a rock drill rig. The drill rig comprises three booms 5A-5C equipped with individual rock drilling machines 3A-3C. The rock drilling machines 3A-3C are arranged on respective feeder arrangements 2A-2C comprising feed beams 10A-10C. Feed holders 47A-47C are arranged to connect the three booms 5A-5C to the respective feeder arrangements 2A-2C. In <FIG> it is illustrated how the three rock drilling machines 3A-3C operate by drilling individual drill strings 6A-6C into a rock face <NUM>. As the rock drilling machines 3A-3C may advance their way into the rock face <NUM> they advance from a back end, i.e., first end block 11A-11C to a front end, i.e., second end block12A-12C of the feed beams 10A-10C.

The drill rig <NUM> comprises a hydraulic arrangement <NUM>' comprising at least a pressure source P and a tank T. The hydraulic arrangement <NUM>' may include more than one pressure source, wherein at least one pressure source is a hydraulic pump adapted to provide a pressure to drive a percussion unit of the rock drilling machine and at least one pressure source is a hydraulic pump adapted to provide a flow to drive a rotation unit of the rock drilling machine. The hydraulic arrangement <NUM>' is arranged to feed the different consumers of the rock drilling machines 3A-3C. Such consumers typically include at least a rotation unit, a percussion unit, and a damper unit. Further, the hydraulic arrangement <NUM>' is arranged to provide hydraulic fluid to hydraulic motors such as hydraulic cylinders arranged to advance the rock drilling machines 3A-3C along the corresponding feeder arrangements 2A-2C. The conduits for the hydraulic fluid are conventionally arranged along or within the boom 5A-5C to the feed holders 47A-47C. As will be described in further detail below, the present disclosure provides improved feeder arrangements 2A-2C comprising hydraulic conduits to supply hydraulic fluids to the consumers of the rock drilling machines 3A-3C.

<FIG> exposes details of such an improved feeder arrangement <NUM>. The feeder arrangement <NUM> is configured to carry a rock drilling machine <NUM> on a carrier <NUM>. In the disclosure of <FIG>, interior components of the feeder arrangement <NUM> are exposed. It will be obvious to the skilled person that the indicated first beam <NUM> may be comprised within a feed beam, i.e., within a longitudinally extending beam structure or cover surrounding the interior components exposed in <FIG>, e.g., in any of feed beams 10A-10C indicated in the disclosure of <FIG>.

The first beam <NUM> comprises a first end block <NUM> and a second end block <NUM> at opposite ends thereof, i.e., at opposite ends of the first beam. The disclosed feeder arrangement <NUM> carries a rock drilling machine <NUM> arranged to operate in an axial direction A1 between the first end block <NUM> and the second end block <NUM>. The first pipe connection <NUM> extends between the first end block <NUM> and the second end block <NUM> and may be comprised in a feed beam, also known as feeder, as disclosed in <FIG>. Thus, the first pipe connection <NUM> may constitute the first beam, form part of the first beam, or be enclosed by the first beam. A rock drilling machine connector <NUM> is slidably arranged with respect to the first pipe connection <NUM>. The rock drilling machine connector <NUM> may be comprised in the carrier <NUM> or connected to the carrier <NUM>. The first pipe connection <NUM> is fluidly connectable to a hydraulic arrangement on the drill rig via the first end block <NUM>, e.g., via a first conduit passing through a first end of the first pipe connection and the first end block. The first pipe connection together with the rock drilling machine connector connect the rock drilling machine <NUM> to the hydraulic arrangement on the drill rig to provide pressurised hydraulic fluid to drive at least one consumer of the hydraulic rock drilling machine <NUM>.

The feeder arrangement disclosed in <FIG> enables a providing of pressurized hydraulic fluid to the rock drilling machine via internal conduits, e.g., via rigid pipes, inside the feeder arrangement whereby the risk of damages on the conduits caused by external factors is minimized.

As illustrated in <FIG>, the rock drilling machine is configured to be arranged on a carrier <NUM> slidably movable between positions along a feed beam having a first beam <NUM>; first and second end blocks <NUM>, <NUM> arranged at opposite ends of said first beam <NUM>. In some examples, the first beam <NUM> may be comprised in the feed beam, i.e., within a longitudinally extending beam structure or cover surrounding the interior components, e.g., in any of the feed beams <NUM> A-10C indicated in the disclosure of <FIG>. The first beam <NUM> includes a first pipe connection <NUM>, comprised within the first beam. The first pipe connection <NUM> may be enclosed by the first beam or forming part of the first beam <NUM>. As is illustrated in the drawings and specified with individual reference numerals in <FIG> the first pipe connection <NUM> may comprise at least two parallel pipes 17A, 17B extending between the first and second end blocks <NUM>, <NUM> and providing separate hydraulic conduits via separate rock drilling machine connectors <NUM>. The number of pipes may of course be adapted to the desired number of conduits needed to provide the rock drilling machine <NUM> with hydraulic fluids.

In <FIG> the rock drilling machine <NUM> is positioned in a most retracted position at the first end block <NUM> at a back end of the first beam <NUM>, in <FIG> the rock drilling machine <NUM> is positioned in an intermediate position and in <FIG> the rock drilling machine <NUM> is positioned in a most forward position at the second end block <NUM> at a front end of the first beam <NUM>. A drill support <NUM> is arranged at the second end block <NUM> to support a drill string that extends from the rock drilling machine <NUM> during operation.

The rock drilling machine <NUM> and the carrier <NUM> are movably arranged with respect to the first beam <NUM> in a first direction A1 along a first pipe connection <NUM>. The first pipe 17A and the second pipe 17B of the first pipe connection <NUM> extend along the first direction A1 from the first end block <NUM> to the second end block <NUM> and are fluidly connected to a hydraulic arrangement on a drill rig as illustrated in <FIG>. The hydraulic arrangement on the drill rig may be connected to the feeder arrangement via at least a first end of the first pipe connection <NUM> and via the first and/or the second end block <NUM>, <NUM>. Optionally, the hydraulic arrangement on the drill rig may be connected to the feeder arrangement via a connection device <NUM>. Such a connection device provides the advantage of enabling simplified hydraulic connectivity, at any connection point along the feed beam, to the hydraulic arrangement on the drill rig. The connection device may comprise a first hydraulic fluid port P<NUM> that is connectable to a hydraulic arrangement on the drill rig. In some examples, the connection device is a part of one of the end blocks <NUM>, <NUM> or arranged in the vicinity of one of the end blocks <NUM>, <NUM>, to connect the first pipe connection <NUM> to the hydraulic arrangement on a drill rig via said end block <NUM> or <NUM>, and via the respective end of the first pipe connection <NUM> to the rock drilling machine <NUM> via an intermediate connector <NUM> and the rock drilling machine connector <NUM>. In such an arrangement, a pressurised hydraulic fluid may be provided via the first pipe 17A, a first intermediate connector 18A and a first rock drilling machine connector 19A, wherein the return may be provided via a second rock drilling machine connector 19B, a second intermediate connector 18B and a second pipe 17B to the hydraulic arrangement <NUM>' on the drill rig <NUM> via said connection device at the end block <NUM> or <NUM>.

The carrier <NUM>, configured to carry the rock drilling machine <NUM>, is arranged to slide on the first beam <NUM> with respect to the first pipe connection <NUM>, e.g., to slide on the first pipe connection itself. The rock drilling machine <NUM> is arranged to receive a hydraulic fluid via the first pipe connection <NUM> and a rock drilling machine connector <NUM>. The intermediary connector <NUM> is configured to enclose a portion of the first pipe connection <NUM>. The rock drilling machine connector <NUM> is arranged outside the intermediate connector <NUM>, enclosing the intermediate connector <NUM> and the first pipe connection <NUM>.

The intermediate connector <NUM> is arranged to enclose a portion of the first pipe connection <NUM> and arranged to slide with respect to the first pipe connection <NUM>, thereby functioning as a double acting cylinder. The rock drilling machine connector <NUM>, which is connected to the rock drilling machine <NUM>, may also function a double acting cylinder. The rock drilling machine connector <NUM> is arranged to enclose a portion of the intermediate connector <NUM> and arranged to slide with respect thereto. In its most basic configuration, the rock drilling machine connector <NUM> includes a first connector port in fluid connection with a first chamber, e.g., a first chamber in an intermediate connector <NUM>, via a first conduit connecting the rock drilling machine to the hydraulic arrangement on the drill rig. Optionally, a connection device, including at least a first hydraulic fluid port that is connectable to a hydraulic arrangement on the drill rig, may be comprised in the feeder arrangement and configured to be in fluid connection with the rock drilling machine connector <NUM>. The first pipe connection <NUM> comprises a first fluid port to a first chamber of the rock drilling machine connector <NUM> and the first connector port is in fluid connection with the first chamber via the first conduit, and optionally the connection device <NUM>, to connect the rock drilling machine <NUM> to the hydraulic arrangement on the drill rig and to provide pressurised hydraulic fluid to drive at least one consumer of the hydraulic rock drilling machine. In the embodiment of <FIG>, the hydraulic fluid connection is provided from the first and/or the second end block <NUM>, <NUM>, e.g., serving as the above mentioned connection device, via the first pipe connection <NUM>, and the rock drilling machine connector <NUM>, to the rock drilling machine <NUM>. As will be recognized by the skilled person, the disclosed configuration allows for pressurised hydraulic fluid to be provided to at least one consumer of the hydraulic rock drilling machine regardless of the current position of the rock drilling machine <NUM>, and hence, regardless of the mutual positions of the first pipe connection <NUM> and the rock drilling machine connector <NUM>.

As further illustrated in <FIG>, the first pipe connection may comprise at least two parallel pipes 17A, 17B extending between the first and second end blocks <NUM>, <NUM> and providing separate hydraulic conduits via separate rock drilling machine connectors 19A, 19B; the rock drilling machine connectors at least partially enclosing first and second intermediate connectors 18A, 18B. The first intermediate connector 18A and a first rock drilling machine connector 19A are arranged on the first pipe 17A of the first pipe connection <NUM>, and the second intermediate connector 18B and a second rock drilling machine connector 19B are arranged on the second pipe 17B. The feeder arrangement <NUM> of the shown embodiment thereby provides at least two conduits for hydraulic fluid to or from the rock drilling machine <NUM>. The first conduit is provided via the first pipe 17A, the intermediate connector 18A and the first rock drilling machine connector 19A and the second conduit via the second pipe 17B, the second intermediate connector 18B and a second rock drilling machine connector 19B; the two conduits being provided regardless of a current position of the rock drilling machine connector <NUM> with respect to the intermediate connector <NUM> and regardless of a current position of the intermediate connector <NUM> with respect to the first pipe connection <NUM>. Further, in specific embodiments, conduits may be provided from both the first and the second end blocks <NUM>, <NUM> via the first pipe connection <NUM>, the intermediate connector <NUM> and the rock drilling machine connector <NUM> to the rock drilling machine <NUM>, such that four individual conduits are provided to the rock drilling machine <NUM>.

<FIG>, and <FIG> disclose an extendable telescopic feeder arrangement <NUM> wherein a rock drilling machine <NUM> and a carrier <NUM> are arranged on an extendable feed beam <NUM>. In addition to a first beam <NUM>, the extendable feed beam <NUM> comprises a second beam <NUM> extending in a longitudinal direction A1 of the first beam <NUM>. The first beam <NUM> is arranged in sliding contact with the second beam <NUM> between an extended state, illustrated in <FIG>, and a compacted state, illustrated in <FIG>.

Turning to <FIG>, the extendable feeder arrangement <NUM> is disclosed in an extended state. The first beam <NUM> extends away in the first direction A1 with respect to the second beam <NUM>. A second pipe connection <NUM> is arranged alongside the first pipe connection <NUM> between the first and second end blocks <NUM>, <NUM> of the first beam <NUM>. A connection device <NUM> is arranged at the second beam <NUM> and connected to the second pipe connection <NUM> to connect to the hydraulic arrangement on the drill rig, e.g., via the first conduit. The feeder arrangement comprises carrier <NUM> arranged on an extendable feed beam <NUM> to carry a rock drilling machine <NUM>. As illustrated, the rock drilling machine is configured to be arranged on a carrier <NUM> slidably movable between positions along an extendable feed beam comprising a first beam <NUM> and a second beam <NUM> extending in a longitudinal direction A1 of the first beam <NUM>. The first beam <NUM> is arranged in sliding contact with the second beam <NUM> between a compacted position and the disclosed extended position in which it extends away in the first direction A1 with respect to the second beam <NUM>. The first beam <NUM> comprises first and the second end blocks <NUM>, <NUM>, arranged at opposite ends of said first beam <NUM>. The second beam <NUM> comprises a connection device including at least a first hydraulic fluid port that is connectable to a hydraulic arrangement on the drill rig and being fluidly connected to a first chamber via the first conduit.

In a drilling operation the rock drilling machine <NUM> starts from the back-end position and advances toward a front end <NUM> of the extendable feed beam <NUM> where a front support <NUM> may be arranged to guide a further extension of the drill string <NUM>. This advancement may be performed in steps. For instance a first advancement step may be achieved by compacting the extendable feed beam <NUM> and aligning the first and the second beams <NUM>, <NUM>. As a subsequent advancement step the rock drilling machine <NUM> may be advanced with respect to the first beam <NUM>. The compaction of the extendable feed beam <NUM> and the advancement of the rock drilling machine <NUM> may be performed in the opposite order, or simultaneously where the rock drilling machine <NUM> is advanced with respect to the first beam <NUM> at the same time as the feed beam <NUM> is compacted.

The movement of the drilling machine <NUM> with respect to the first pipe connection <NUM> may also be made in steps in that firstly the intermediate connector <NUM> slides with respect to the first pipe connection <NUM>, and secondly the rock drilling machine connector <NUM> slides with respect to the intermediate connector <NUM>. The movement of the intermediate connector <NUM> and the rock drilling machine connector <NUM> may also be performed in the opposite order, or simultaneously in an overlapping movement.

<FIG> discloses the extendable feeder arrangement <NUM> in a compacted state, wherein the second beam is adjacent to the first beam. A second pipe connection <NUM> is arranged alongside the first pipe connection <NUM> between the first and second end blocks <NUM>, <NUM> of the first beam <NUM>. A connection device <NUM> is arranged at the second beam <NUM> and connected to the second pipe connection <NUM> to connect to the hydraulic arrangement on the drill rig, e.g., via the first conduit. As illustrated, the rock drilling machine is configured to be arranged on a carrier <NUM>. The first beam <NUM> is arranged in sliding contact with the second beam <NUM>. The first beam <NUM> comprises first and second end blocks <NUM>, <NUM>, arranged at opposite ends of said first beam <NUM>. The second beam <NUM> comprises a connection device <NUM>, i.e., a connection device including at least a first hydraulic fluid port that is connectable to a hydraulic arrangement on the drill rig and being fluidly connected to a first chamber via the first conduit.

In a drilling operation the rock drilling machine <NUM> starts from the back-end position and advances toward a front end <NUM> of the extendable feed beam <NUM> where a front support <NUM> may be arranged to guide a further extension of the drill string <NUM>. During an advancement step, the rock drilling machine <NUM> may be advanced with respect to the first beam <NUM>.

<FIG> and <FIG> exposes the internal structures of the extendable feeder arrangement. As illustrated, a first pipe connection <NUM> and a second pipe connection <NUM> are comprised in first and second feed beams <NUM>, <NUM>. In some examples, the first and second pipe connection <NUM>, <NUM> both extend between the first end block <NUM> and the second end block <NUM> of the second beam <NUM>. In the shown example, the second pipe connection <NUM> includes two separate pipes 21A and 21B extending alongside the first pipe 17A and the second pipe 17B of the first pipe connection <NUM>. The number of pipes may however be adapted to the number of conduits needed for the specific application. For a hydraulic rock drilling machine four separate hydraulic conduits may be sufficient. However, the pipe connections <NUM> and <NUM> may also be supplemented with pipes or hoses for providing water, air and/or lubrication to the drilling machine.

Further, in addition to providing hydraulic fluid to the rock drilling machine <NUM>, the pipe connections <NUM> and <NUM> may also be utilized to move the rock drilling machine <NUM> during and between rock drilling operations. Specifically, the second pipe connection <NUM> may be utilised to control the extension of the feed beam <NUM> by moving the first beam <NUM> with respect to the second beam <NUM>. The second pipe connection <NUM> comprises one or more conduits for providing pressurised hydraulic fluid from the connection device <NUM> to the first pipe connection <NUM> via at least one of the first and second end blocks <NUM>, <NUM> of the first beam <NUM>.

As illustrated, in <FIG> and <FIG>, the second pipe connection <NUM> may be fluidly connected to the connection device <NUM>. The connection device may be immovable with respect to the second beam <NUM>, and at the same time the second pipe connection <NUM> may be arranged to slide with respect to the connection device <NUM>. In some examples, the connection device is suspended in flexible manner. In some examples, the connection device <NUM> is connected to the second pipe connection <NUM> via a pipe connector <NUM>, comprising a first and second chamber. A first and a second port may be provided in the second pipe connection <NUM> on opposite sides of a partition thereof, the first port connecting the first hydraulic fluid port of the connection device <NUM> to the first conduit in the first end of the second pipe connection <NUM> via the first chamber. The second port may connect the second hydraulic fluid port of the connection device <NUM> to the second conduit via the second end of the second pipe connection <NUM> via the second chamber. Details of the connection device will be further explained below with reference to the disclosure of <FIG>.

<FIG> show a feeder arrangement <NUM>, i.e., a telescopic feeder arrangement, as connected to a feed holder <NUM>. The feeder arrangement <NUM> comprises an extendable feed beam <NUM> with a first beam <NUM> and a second beam <NUM>; the first and second beam <NUM>, <NUM> extending in a longitudinal direction A1 of the first beam <NUM>. The first beam <NUM> is arranged in sliding contact with the second beam <NUM> between a compacted state and an extended state. In the extended state, the first beam extends away in the first direction A1 with respect to the second beam. The feeder arrangement further comprises first and second end blocks <NUM>, <NUM> at respective ends of the first beam <NUM>. A connection device <NUM> is arranged at the second beam <NUM>. In some examples, the connection device may be arranged in the feed holder <NUM>. The connection device is configured to receive a hydraulic fluid from the drill rig, e.g., by means of the hydraulic fluid connection to an outer end of the boom. An exemplary hydraulic fluid connection is disclosed between the feed holder <NUM>, which is configured to be attached to an outer end of a boom <NUM> (see <FIG>), and the extendable feeder arrangement. Connective lines, including at least two hydraulic hoses <NUM>, are arranged to connect conduits from the hydraulic arrangement on the drill rig, via the boom, to the feed beam <NUM>, In <FIG> the second beam <NUM> of the feed beam <NUM> is at its foremost position with respect to the feed holder <NUM>, i.e., at the front end <NUM> of the feed beam <NUM> when the feed beam is in its most distant position with respect to the feed holder <NUM>. In this position, the hydraulic hoses <NUM> extend forward from the feed holder <NUM>. In <FIG> the second beam <NUM> of the feed beam <NUM> is centrally positioned with respect to the feed holder <NUM>, wherein the hydraulic conduits <NUM> extend in a curved formation to the connection device <NUM> which is here positioned immediately above the feed holder <NUM> and in <FIG> the second beam <NUM> of the feed beam <NUM> is in its most retracted position with respect to the feed holder <NUM>, wherein the hydraulic conduits <NUM> extend backwards from the feed holder <NUM> to the connection device <NUM>. The hydraulic hoses <NUM> are preferably arranged in a shielded manner, e.g. inside a housing of the feed holder <NUM>.

<FIG> shows details of an example hydraulic configuration comprising first and second hydraulic assemblies <NUM> and <NUM> for providing hydraulic fluid to a rock drilling machine <NUM> via a telescopic feeder arrangement. The hydraulic configuration accomplishes the provision of hydraulic fluid to and from one or more of the consumers <NUM>, <NUM>, <NUM> of the hydraulic rock drilling machine <NUM>, e.g., to and from a percussion unit, a damper unit, and/or a rotation unit.

The upper part of <FIG> shows the first hydraulic assembly <NUM> in which pressurized hydraulic fluid is conveyed to the rock drilling machine <NUM> via a rock drilling machine connector <NUM> that is slidably arranged with respect to the first pipe connection <NUM>. A first end block <NUM> and a second end block <NUM> are provided at opposite ends of a first pipe connection <NUM>. The pressurized hydraulic fluid is conveyed in a first conduit 30A through a first end of a first pipe connection <NUM>, and is allowed to escape to tank T via a second conduit 30B through an opposite second end of the first pipe connection <NUM>. The provisioning of the pressurized hydraulic fluid allows the rock drilling machine connector <NUM> to advance with respect to the first pipe connection <NUM>, e.g., by advancing an intermediate connector <NUM>.

The rock drilling machined connector <NUM> includes a first connector port PA, and optionally a second connector port PB, connectable to the rock drilling machine <NUM>. The first and the second connector ports PA, PB may be integrated parts of the rock drilling machine connector <NUM>. The first pipe connection <NUM> comprises one or more rigid pipes extending between the first and second end blocks <NUM>, <NUM>. The first pipe connection <NUM> is fluidly connectable to a hydraulic arrangement <NUM>' on the drill rig via the first conduit 30A passing through the first end of the first pipe connection <NUM> and the first end block <NUM>. The first pipe connection <NUM> comprises a first fluid port 38A to the rock drilling machine connector <NUM>. The first connector port PA is in fluid connection with a first chamber 27A via the first conduit 30A to connect the rock drilling machine to the hydraulic arrangement <NUM>' on the drill rig and to provide pressurised hydraulic fluid to drive at least one consumer <NUM>, <NUM>, <NUM> of the hydraulic rock drilling machine <NUM>. Hence, the feeder arrangement <NUM> makes it possible to provide pressurised hydraulic fluid to drive at least one consumer <NUM>, <NUM>, <NUM>, via internal conduits.

In the example hydraulic configuration disclosed in <FIG>, the rock drilling machine connector <NUM> is a multi-stage connector also comprising an intermediate connector <NUM> configured to enclose a portion of the first pipe connection <NUM>. The rock drilling machine connector <NUM> is in turn arranged to enclose the intermediate connector <NUM> and to slide in the axial direction with respect to the intermediate connector <NUM>. The first fluid port 38A of the first pipe connection <NUM> is connected to the first chamber 27A of the rock drilling machine connector <NUM> via a first intermediate chamber 26A of the intermediate connector <NUM>, and a second fluid port 38B of the first pipe connection <NUM> is connected to a second chamber 27B of the rock drilling machine connector <NUM> via a second intermediate chamber 26B of the intermediate connector <NUM>. The first and the second intermediate chambers 26A, 26B of the intermediate connector <NUM> are separated by a partition <NUM>, e.g., piston, arranged circumferentially on the pipe connection <NUM>. The first and the second chambers 27A, 27B of the rock drilling machine connector <NUM> are separated by a partition <NUM>, e.g., piston, arranged circumferentially on the intermediate connector <NUM>.

The intermediate chamber 26A may be provided between a sealing 31A at an outer end of the intermediate connector <NUM> and a sealing 31B at a first end of a partition <NUM>, which is fixed around a central part of the first pipe connection <NUM>. The partition <NUM>, e.g., piston, divides the first pipe connection <NUM> into first and second intermediate chambers 26A and 26B, respectively, positioned at opposite sides of the partition <NUM>. When the first intermediate chamber 26A is filled with pressurized hydraulic fluid the pressure may act to push the sealing 31A and the sealing 31B away from each other.

The movement of the rock drilling machine <NUM> with respect to the first pipe connection <NUM> may be performed in steps in that firstly the intermediate connector <NUM> slides with respect to the first pipe connection <NUM>, and secondly the rock drilling machine connector <NUM> slides with respect to the intermediate connector <NUM>. The movement of the intermediate connector <NUM> and the rock drilling machine connector <NUM> may also be performed in the opposite order, or simultaneously in an overlapping movement.

The lower part of <FIG> discloses the second hydraulic assembly <NUM> comprising a connection device <NUM> configured to receive pressurized hydraulic fluid from a hydraulic arrangement <NUM>' on the drill rig to the feeder arrangement. In the example configuration, the connection device <NUM> further comprises a pipe connector <NUM> that may form a part of the connection device <NUM> or be connected thereto. The pipe connector <NUM> comprises a first hydraulic fluid port P<NUM>, and optionally a second hydraulic fluid port P<NUM>, connectable to the hydraulic arrangement <NUM>' on the drill rig.

In the disclosed example hydraulic configuration, the second hydraulic fluid port P<NUM> and the second connector port PB are fluidly connected via the second conduit 30B passing through the second end of the first pipe connection <NUM> and the second end block <NUM>. The second conduit 30B may provide a return line from one or more of the consumers <NUM>, <NUM>, <NUM> of the hydraulic rock drilling machine to the hydraulic arrangement <NUM>' on the drill rig.

The connection device may be connected to a second pipe connection <NUM> via the pipe connector <NUM>, i.e., to a second hydraulic assembly <NUM>. The second pipe connection <NUM> is slidably arranged with respect to the pipe connector <NUM> and the connection device <NUM>. The pipe connector <NUM> may comprise a first and second chamber 25A, 25B. A first and a second port 39A, 39B may be provided in the second pipe connection <NUM> on opposite sides of a partition <NUM>, e.g., a piston, the first port 39A connecting the first hydraulic fluid port P<NUM> of the connection device <NUM> to the first conduit 30A in the first end of the second pipe connection <NUM> via the first chamber 25A; the second port 39B connecting the second hydraulic fluid port P<NUM> of the connection device <NUM> to the second conduit 30B via the second end of the second pipe connection <NUM> via the second chamber 25B. In an optional, non-disclosed, configuration, the first hydraulic fluid port P<NUM> of the connection device <NUM> may be connected to the second conduit 30B and the second hydraulic fluid port P2 of the connection device may be connected to the first to the first conduit 30A.

In the example hydraulic configuration of <FIG>, pressurized hydraulic fluid may be conveyed to the rock drilling machine <NUM> through the first conduit 30A and allowed to escape to tank T through the second conduit 30B and. Thus, a hydraulic pressure source P of the hydraulic arrangement <NUM>' on the drill rig <NUM> may drive a consumer <NUM>, <NUM>, <NUM> of the rock drilling machine <NUM> via the first conduit 30A and a return flow from the rock drilling machine <NUM> is connectable to tank T via the second conduit 30B.

A first sealing 33A may be arranged on the pipe connector <NUM> that is fixed with respect to the connection device <NUM>, wherein the second sealing 33B is arranged on a partition <NUM>, which may be fixed to the second pipe connection <NUM>. The pressurized hydraulic fluid in 25A may act to push the second pipe connection <NUM> to the right in the drawing. Further, as is illustrated by the conduits 30A and 30B, the hydraulic fluid may be conveyed from the first and second chambers 25A or 25B to opposite sides of the pipe connection <NUM>. Hence, the first and second conduits 30A and 30B connect respective sides of the disclosed hydraulic configuration, i.e., connecting the first hydraulic assembly <NUM> and the second hydraulic assembly <NUM> to each other via the first and second end blocks <NUM>, <NUM>, respectively.

In some examples, pressurized hydraulic fluid to drive a consumer <NUM>, <NUM>, <NUM> of the hydraulic rock drilling machine <NUM> is conveyed thereto via the first conduit 30A that passes through the first chamber 25A of the second hydraulic assembly <NUM> and the first chamber 27A and the first intermediate chamber 26A of the first hydraulic assembly <NUM>. A return flow of the hydraulic fluid from the consumer is conveyed via the second conduit 30B that passes through the second intermediate chamber 26B and the second chamber 27B, opposite to the first chamber 27A, and through the second hydraulic assembly <NUM>, through a second chamber 25B, opposite to the first chamber 25A of the second hydraulic assembly <NUM>.

Hence, first and the second hydraulic assemblies <NUM> and <NUM> may be arranged in series with each other to accomplish the provision of hydraulic fluid to and from one or more of the consumers <NUM>, <NUM>, <NUM> of the hydraulic rock drilling machine <NUM>, e.g., to and from the percussion unit, the damper unit, and/or the rotation unit.

In the example of <FIG>, a separate, non-illustrated, drive motor may be arranged to control the extension/retraction of the feed beam and/or the moving of the rock drilling machine <NUM>.

<FIG> discloses a top view of an extendable telescopic feeder arrangement carrying a rock drilling machine. In <FIG> the first beam <NUM> is shown from above with a flexible hydraulic hose <NUM> arranged to be connected from the connection device <NUM> to the rock drilling machine <NUM>. The hydraulic hose <NUM> is preferably arranged inside the first beam <NUM>, and to follow the movement of the rock drilling machine <NUM> along the first beam <NUM>.

<FIG> discloses a first beam <NUM> comprising a first and a second void <NUM>, <NUM>, respectively, that extend along at least a part of the length of the first beam <NUM>. These voids <NUM>, <NUM> may be utilised to house conduits in the form of hoses for conveying water, air, lubricant, or additional hydraulic fluid to or from the rock drilling machine <NUM>, such as the hydraulic hose <NUM> shown in <FIG>.

In <FIG> an extendable feeder arrangement for a rock drilling machine <NUM> is disclosed in a cut view. The feeder arrangement includes a first beam <NUM> comprising a first pipe connection comprising individual pipes 17A, 17B. A rock drilling machine connector <NUM> is connectable to the rock drilling machine <NUM> by means of a first connector port. The rock drilling machine connector <NUM> is slidably arranged with respect to the first pipe connection <NUM>. The first pipe connection <NUM> is fluidly connectable to a hydraulic arrangement on the drill rig. A second beam <NUM> comprises a second pipe connection comprising individual pipes 21A, 21B. A rock drilling machine <NUM> is arranged to slide with respect to the first beam <NUM> along a slit <NUM> that extends along the length of the first beam <NUM>. The rock drilling machine <NUM> is connected to a rock drilling machine connector <NUM>, so as to slide therewith outside the intermediate connector <NUM>, which in turn is arranged to slide with respect to the first and the second pipes 17A, 17B of the first pipe connection <NUM> as described above.

<FIG> further illustrates how the first and second beam <NUM> and <NUM> are arranged with respect to each other and how a third and a fourth pipe 21A and 21B, both of the second pipe connection <NUM>, may be housed inside the second beam <NUM>, although they extend between the first and second blocks <NUM> and <NUM> of the first beam <NUM>. Also, a separate conduit <NUM> may be arranged between the third and fourth pipes 21A and 21B. This separate conduit <NUM> may be a pressure equilibrated conduit, e.g., configured to provide a hydraulic flow to drive a consumer of the rock drilling machine <NUM>. Instead of the separate conduit <NUM> a hydraulic cylinder may be arranged in this space. Such a hydraulic cylinder could e.g. be arranged to govern the extension and retraction of the extendable feed beam <NUM>. Also, a separate hydraulic cylinder may be arranged to drive the movement of the rock drilling machine <NUM>.

<FIG> discloses the second end block <NUM> of the first beam <NUM>. The first end block <NUM> may be similar or identical to the second end block <NUM>. As is illustrated the end block <NUM> comprises a first and a second end block connection <NUM>, <NUM> that connects the first pipe 17A to the third pipe 21A and the second pipe 17B to the fourth pipe 21B. This is one of many possible embodiments of an end block. The end block may be comprised of pipes for further connection of the first pipe connection <NUM>. In the shown embodiment of the telescopic feed beam <NUM>, end block connection <NUM>, <NUM> which may take any form and may include valves or cross connections for providing further possibilities of connections between the hydraulic fluid ports P<NUM> and P<NUM> and the connector ports PA and PB.

Thereby, the individual pipes 17A, 17B, 21A, 21B that extend between the first and second end blocks <NUM>, <NUM> of the first beam <NUM> provide at least four individual hydraulic conduits, which are interconnected via respective end block connections <NUM>, <NUM> of the respective end blocks <NUM>, <NUM> to the rock drilling machine <NUM>.

The first conduit is provided from the connection device <NUM> to a first end of the third pipe 21A via the first end block <NUM> to a first end of the first pipe 17A. The second conduit is provided from the connection device <NUM> to a second end of the third pipe 21A via the second end block <NUM> to a second end of the first pipe 17A. A third conduit (not shown) may be provided from the connection device <NUM> to a first end of the fourth pipe 21B via the first end block <NUM> to a first end of the second pipe 17B. A fourth conduit (not shown) may be provided from the connection device <NUM> to a second end of the fourth pipe 21B via the second end block <NUM> to a second end of the second pipe 17B.

In specific embodiments the third conduit or the fourth conduit may be used to convey a return flow from a consumer of the rock drilling machine <NUM> via to tank T. The flow to drive the consumer <NUM> may be provided in the other of the third conduit or fourth conduit, or preferably via a separate line, because if the flow to drive the consumer <NUM> were conveyed in any of the pipes 17A, 17B, 21A, 21B the flow could give rise to unwanted vibrations. The separate line may either be a pressure equilibrated conduit <NUM> or a hydraulic hose <NUM> shown in <FIG> and arranged inside the feed beam <NUM>, e.g. in one of the longitudinal voids <NUM>,<NUM> as illustrated in <FIG>.

The description of the example embodiments provided herein have been presented for purposes of illustration. The description is not intended to be exhaustive or to limit example embodiments to the precise form disclosed; modifications and variations are possible in light of the above teachings or may be acquired from practice of various alternatives to the provided embodiments. The examples discussed herein were chosen and described in order to explain the principles and the nature of various example embodiments and its practical application to enable one skilled in the art to utilize the example embodiments in various manners and with various modifications as are suited to the particular use contemplated. It should be appreciated that the example embodiments presented herein may be practiced in combination with each other.

In the drawings and specification, there have been disclosed exemplary aspects of the disclosure. However, many variations and modifications can be made to these aspects without substantially departing from the principles of the present disclosure. Thus, the disclosure should be regarded as illustrative rather than restrictive, and not as being limited to the particular aspects discussed above. Accordingly, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claim 1:
A feeder arrangement (<NUM>) for a rock drilling machine (<NUM>) on a drill rig (<NUM>), which feeder arrangement comprises:
- a feed beam (<NUM>) with a first beam (<NUM>) that comprises a first end block (<NUM>) and a second end block (<NUM>) at opposite ends thereof,
- a first pipe connection (<NUM>) extending between the first end block (<NUM>) and the second end block (<NUM>), and
- a rock drilling machine connector (<NUM>) including at least a first connector port (PA) that is connectable to the rock drilling machine (<NUM>), the rock drilling machine connector (<NUM>) being slidably arranged with respect to the first pipe connection (<NUM>),
wherein the first pipe connection (<NUM>) is comprised in the feed beam (<NUM>) and is fluidly connectable to a hydraulic arrangement (<NUM>') on the drill rig (<NUM>) via a first conduit (30A) passing through a first end of the first pipe connection (<NUM>) and the first end block (<NUM>), the first pipe connection (<NUM>) comprising a first fluid port (38A) to a first chamber (27A) of the rock drilling machine connector (<NUM>); and wherein the first connector port (PA) is in fluid connection with the first chamber (27A) via the first conduit (30A) to connect the rock drilling machine (<NUM>) to the hydraulic arrangement (<NUM>') on the drill rig (<NUM>) and to provide pressurised hydraulic fluid to drive at least one consumer (<NUM>, <NUM>, <NUM>) of the hydraulic rock drilling machine (<NUM>).