Patent Description:
A mobile screen for mineral material can be implemented as a trailer to be towed by a truck. To this end, the mobile screen can be pivotably moved between an operating position and transport position in which the screen is compacted in order to meet transport dimensions.

The screen can be motorized to shake mineral material down along and through the screen so as to separate fractions of different dimensions. One or more screen decks can be vibrated through a screen frame to which screen meshes are attached. The screen frame itself can be vibrated by a vibrator, such as a motor that rotates an eccentric mass. When resiliently supported, e.g., by springs, the screen moves under vibration effect back and forth so that mineral material covering the screen passes through or along the screen towards the front end of the screen for subsequent in-line crushing or conveying for further processing or use.

A mobile screen is typically implemented with a two-tier frame system comprising a platform chassis and a screen support frame that carries the screen, a crusher (if provided) and any conveyors. The processing equipment frame is pivoted to the platform frame and moved between the operating and transport positions by hydraulic rams. In order to support the screen more robustly, the platform frame is supported by legs against ground and supports maintain the screen support frame in its correct position above the platform frame, e.g., by beams fixed between the platform and screen support equipment frames.

Mobile screens conveniently enable transport, for example, by roads and railroads. However, to this end, the plants typically require an effort for adopting a transport state of sufficiently narrow, low, and short dimensions. For example, the screening apparatus can be pivoted upward for screening and down onto a body for transport.

A multideck screen outputs plural fractions that should be conveyed to separate piles or further processes. To this end, dividing hoppers can be used to divide different fractions to convenient positions for further conveying by conveyors, for example. In an implementation, removable chutes enable passing the outputs of the dividing hopper to such convenient positions. However, the chutes must be manually removed and separately transported or otherwise carried along. Moreover, due to the manual handling requirement, the chutes could be crushed between moving parts, if not removed before lowering a screen, for example.

Background art is disclosed in publications <CIT>, which discloses the preamble of claim <NUM>, <CIT>.

It is an object of the present invention to avoid or mitigate disadvantages of the prior art, or to at least provide a new technical alternative.

According to a first example aspect there is provided a transportable mineral material processing system, comprising:.

The lateral footprint comprises the region defined by structural parts of the platform frame and any intermediate area between the structural parts.

The chute may be further configured to be connected to the dividing hopper in both the chute transport state and the chute operating state. The chute may be further configured to be connected to the dividing hopper in both the chute transport state and the chute operating state and in between these states.

The chute may be telescopically movable. The chute may comprise two parts. The chute may comprise a fixed part attached to the dividing hopper or to the screen support frame. The chute may comprise a movable part that is telescopically movable along the fixed part.

The chute output position may be adjustable.

The chute may be lockable to the operating state. The chute may be lockable to the operating state with a lock pin.

The chute may be configured to move from the transport state to the chute operating state over the platform frame.

The chute may be configured to move from the transport state to the chute operating state under the platform frame.

The transportable mineral material processing system may comprise a chute retraction mechanism configured to move the chute from the chute operating state to the chute transport state on moving the screen support frame to the lowered transport position. The chute retraction mechanism may comprise a resilient biasing element configured to create a retraction force for retracting the chute. The resilient biasing element may comprise a spring. The resilient biasing element may comprise a weight. The chute retraction mechanism may be automatic.

The transportable mineral material processing system may comprise a chute extraction mechanism configured to move the chute from the chute transport state to the chute operating state on moving the screen support frame to the elevated operating position. The chute extraction mechanism may be automatic.

The transportable mineral material processing system may comprise a first pulling member configured to move the chute from the operating position to the transport position on moving the screen support frame from the operating position to the transport position. The first pulling member may comprise a string. The first pulling member may comprise a chain. The first pulling member may comprise a flexible band.

The transportable mineral material processing system may comprise a second pulling member configured to move the chute from the operating position to the transport position on moving the screen support frame from the operating position to the transport position.

The second pulling member may comprise a string. The second pulling member may comprise a chain. The second pulling member may comprise a flexible band.

The transportable mineral material processing system may comprise two or more of the chutes. The screening apparatus may comprise more than three of the chutes. Different ones of the two or more chutes may be configured to guide different ones of the different size fractions. Different ones of the two or more chutes may have respective different chute output positions.

The dividing hopper may be supported by the screen support frame.

The platform frame may be made of steel plate. The platform frame may comprise a plurality of legs. The plurality of legs may be made of steel plate.

The screen support frame may be made of steel plate.

The transportable mineral material processing system may comprise a mobile mineral material processing plant.

The transportable mineral material processing system may comprise the multideck screen attached to the screen support frame. The multideck screen may comprise more than two screen decks.

The transportable mineral material processing system may comprise a wheel base for towable movement of the transportable screening system.

The transportable mineral material processing system may comprise a skid base for towable movement of the transportable screening system.

The transportable mineral material processing system may comprise a wheel base for self-propelling movement of the transportable screening system.

The transportable mineral material processing system may comprise a track base for self-propelling movement of the transportable screening system.

The transportable mineral material processing system may comprise a crusher. The crusher may be a cone crusher. The crusher may be a gyratory crusher. The crusher may be a jaw crusher.

According to a second example aspect there is provided a method for adapting a mineral material crushing system between operating and transport configurations, comprising:.

<FIG> shows a side view of a mobile drawing of a mobile mineral material processing system <NUM> according to an embodiment of the invention. The mineral material processing system <NUM> comprises a screen support frame <NUM> configured to receive and support a multideck screen <NUM> that comprises a plurality of stacked screen decks configured to output different size fractions at a discharge end of the screen decks. The system <NUM> further comprises a dividing hopper <NUM> comprising a reception configured to receive from the multideck screen, when installed, the output different size fractions and further comprising a chute <NUM> (three chutes <NUM> visible in <FIG>) configured to guide the different size fractions and to respective chute output position. <FIG> further shows a platform frame <NUM> configured to movably support the screen support frame <NUM> so that the screen support frame <NUM> and the multideck screen <NUM> are movable between an elevated operating position and to a lowered transport position. The chute output position laterally resides outside a lateral footprint bordered by the platform frame <NUM>. The chute <NUM> is movable between a chute transport state (see <FIG>) and a chute operating state (See <FIG>) so that at least a portion of a weight of the chute <NUM> is carried by the dividing hopper <NUM> in and between these states.

<FIG> further shows a plurality of legs <NUM> for supporting the platform frame <NUM> to ground (e.g., for sturdy supporting of the mobile screen body when operating any equipment attached to the mobile screen body, such as a screen and/or crusher).

In an embodiment, lifting equipment is provided for moving the screen support frame <NUM> between the transport position and the operating position. The lifting equipment comprise, for example, at least one hydraulic ram <NUM>. The at least one hydraulic ram can be telescopic such that the ram can achieve sufficient extension length while not extending obtrusively low in the transport position.

The upwards inclining angle of the screen support frame <NUM> can be, for example, greater than <NUM> degrees and/or less than <NUM> degrees.

In <FIG>, the screen support frame <NUM> is shown movably supported by the platform frame <NUM> using a pivot joint <NUM>.

The legs <NUM> can be made extendable, e.g., hydraulically or by manual action. The platform frame <NUM> can be equipped with wheel suspension for a plurality of wheels <NUM>. The suspension can be made retractable and expandable by machine operation for transferring weight of the mobile screen body from the wheels <NUM> to the legs <NUM> and back to the wheels <NUM>.

While <FIG> shows wheels <NUM>, the platform frame <NUM> can be additionally or alternatively equipped with crawler tracks. In an embodiment, the platform frame <NUM> also comprises a crawler track suspension for one or more crawler tracks, which crawler track suspension is retractable and expandable by machine operation. The platform frame <NUM> can be equipped with an engine unit to provide self-propelling capability.

Various parts of the structures can be made of steel plate, including, for example, partially or entirely any one or more of the following: platform frame <NUM>; the legs <NUM>; the screen support frame <NUM>; and the dividing hopper <NUM>.

The screen <NUM> can be attached to the screen support frame <NUM> via a plurality of spring groups <NUM> each comprising one or more springs <NUM>.

In an embodiment, the mobile mineral material processing system <NUM> further comprises a crusher <NUM> attached to the platform frame <NUM>, such as a cone crusher, an impact crusher, or a jaw crusher. The mobile mineral material processing system <NUM> further comprises in an embodiment a feed <NUM> such as a channel or conveyor for supplying an oversize fraction of the screen <NUM> or screening produced by the screen <NUM> to the crusher <NUM>.

The mobile mineral processing system <NUM> is constructed in an embodiment to be transportable as a semi-trailer.

The chute <NUM> of an embodiment is connected to the dividing hopper in both the chute transport state and the chute operating state. Moreover, the chute <NUM> may remain connected to the dividing hopper <NUM> in both the chute transport state and the chute operating state while transitioning between these states.

As shown in <FIG> in particular, the chute <NUM> can be made telescopically movable. In that embodiment, the chute <NUM> comprises two parts. Alternatively, the chute <NUM> may comprise a fixed part attached to the dividing hopper <NUM> or to the screen support frame <NUM>. In an embodiment, the chute <NUM> comprises a movable part that is telescopically movable along the fixed part.

In an alternative embodiment (not shown), the chute <NUM> is pivotably movable in alternative or addition to the telescopic movement.

In an embodiment, the chute output position is adjustable. This may help aligning a subsequent conveyor with the chute output position, for example.

In an embodiment, the chute <NUM> is lockable to the operating state using, for example, a lock pin that, for example, passes through two mutually movable telescopic parts of the chute <NUM>.

In an embodiment, the chute <NUM> is configured to move from the transport state to the chute operating state over the platform frame <NUM>.

In an embodiment, the chute <NUM> is configured to move from the transport state to the chute operating state under the platform frame <NUM>.

With more than one chutes <NUM>, some of the chutes <NUM> may be different by structure and / or alignment with relation to the platform frame <NUM>. Different ones of two or more chutes <NUM> may be configured to guide different ones of the different size fractions. Different ones of the two or more chutes <NUM> may have respective different chute output positions.

In an embodiment, the transportable mineral material processing system <NUM> comprises a chute retraction mechanism configured to move the chute <NUM> from the chute operating state to the chute transport state on moving the screen support frame to the lowered transport position. In an embodiment, the chute retraction mechanism comprises a resilient biasing element configured to create a retraction force for retracting the chute <NUM>. The resilient biasing element may comprise a spring. The resilient biasing element may comprise a weight.

In an embodiment, the transportable mineral material processing system <NUM> comprises a chute extraction mechanism configured to move the chute <NUM> from the chute transport state to the chute operating state on moving the screen support frame to the elevated operating position.

In an embodiment, the transportable mineral material processing system <NUM> comprises a first pulling member configured to move the chute <NUM> from the operating position to the transport position on moving the screen support frame from the operating position to the transport position. In an embodiment, the first pulling member comprises a string. In an embodiment, the first pulling member comprises a chain. In an embodiment, the first pulling member may comprises flexible band.

In an embodiment, the transportable mineral material processing system <NUM> comprises a second pulling member configured to move the chute <NUM> from the operating position to the transport position on moving the screen support frame from the operating position to the transport position. The second pulling member may comprise a string. The second pulling member may comprise a chain. The second pulling member may comprise a flexible band.

In an embodiment, the dividing hopper <NUM> is supported by the screen support frame.

In an embodiment, the platform frame <NUM> is made of steel plate. The plurality of legs <NUM> may be made of steel plate.

In an embodiment, the screen support frame <NUM> may be made of steel plate.

In an embodiment, the transportable mineral material processing system <NUM> comprises a mobile mineral material processing plant.

There is also provided a method for adapting a mineral material crushing system between operating and transport configurations. The method comprises any one or more of:.

Various embodiments have been presented. It should be appreciated that in this document, words comprise, include, and contain are each used as open-ended expressions with no intended exclusivity.

Claim 1:
A transportable mineral material processing system (<NUM>), comprising:
a screen support frame (<NUM>) configured to receive and support a multideck screen (<NUM>) that comprises a plurality of stacked screen decks configured to output different size fractions at a discharge end of the screen decks;
a dividing hopper (<NUM>) comprising a reception (<NUM>) configured to receive from the multideck screen (<NUM>), when installed, the output different size fractions and further comprising a chute (<NUM>) configured to guide at least one of the different size fractions to a chute output position; and
a platform frame (<NUM>) configured to movably support the screen support frame (<NUM>) so that the screen support frame (<NUM>) and the multideck screen (<NUM>) are movable between an elevated operating position and to a lowered transport position;
characterised in that
the chute output position laterally resides outside a lateral footprint bordered by the platform frame (<NUM>); and
in that the system further comprises means for moving the chute (<NUM>) between a chute transport state and a chute operating state so that at least a portion of a weight of the chute (<NUM>) is carried by the dividing hopper in and between these states.