Patent ID: 12194547

DETAILED DESCRIPTION

FIG.1toFIG.14show an extraction device1, which is intended for interacting with a core drill. The extraction device1has a housing4, which is designed with a cover2and a wall3and altogether has the shape of a V. The extraction device1is designed in the present case as substantially symmetrical in relation to a longitudinal center plane6(see, e.g.,FIG.3), wherein an extraction nozzle5is connected to the cover2in a central region. The connection nozzle is provided for connecting the extraction device1to a suction device or a dust collector, by means of which a negative pressure can be generated in a cavity7of the extraction device1that can be seen for example inFIG.4.

As can be seen more specifically for example inFIG.8, the wall3is in the present case arranged substantially perpendicularly to the cover2and connected to the cover2around the periphery. The wall3has in this case a first wall region10, a second wall region11, a third wall region12and a fourth wall region13. The first wall region10, the second wall region11and the third wall region12are in the present case substantially planar, wherein the first wall region10is connected to the third wall region12and the second wall region11is connected to the third wall region12in a peripheral region of the third wall region12that is facing away from the region of attachment of the first wall region10to the third wall region12. A surface14of the first wall region10that is facing away from the cavity7forms an obtuse angle16, which in the present case is approximately 140°, with a surface15of the second wall region11that is facing away from the cavity7.

The fourth wall region13is U-shaped or crescent-shaped, wherein the fourth wall region13has substantially planar portions17,18,19respectively running substantially parallel to the first wall region10, the second wall region11and the third wall region12. The fourth wall region13is connected in a peripheral region to a peripheral region of the first wall region10that is facing away from the third wall region12and is connected in a further peripheral region to a peripheral region of the second wall region11that is facing away from the third wall region12.

As can be seen for example inFIG.7andFIG.8, arranged in a peripheral region of the wall3that is facing away from the cover2in the present case are three sealing elements20,21,22, which are connected to the wall3almost completely around the periphery and can be fitted on the respective region10,11,12or13of the wall3. The first sealing element20is in this case connected to the first wall region10and has substantially a longitudinal extent comparable to the first wall region10. The second sealing element21is connected to the second wall region11and has substantially a longitudinal extent comparable to the second wall region11. By contrast, the third sealing element22is connected to the fourth wall element13and has substantially a longitudinal extent comparable to the third wall region13.

In the cavity7there is also arranged an extraction region25, which is formed here with a wall26that is cylindrical in certain regions, wherein the wall26is connected to the cover2. The wall26has an extent in terms of height such that, in an operating state in which the extraction device1is held on the base material, the wall26is preferably directly in contact with the base material. Consequently, in particular in the operating state of the extraction device1, on a side facing the base material, all of the sealing elements20,21,22and the wall26of the extraction region25lie substantially in one plane. In the operating state of the extraction device1, the extraction device1is held against the base material, for example a floor or a wall, by a negative pressure generated in the cavity7by the suction device, preferably without any further holding device.

Also provided in the present case are two extraction channels30,31, which are formed by the fourth wall region13and respectively a fifth wall region32, running substantially parallel to the fourth wall region13, and a sixth wall region33, running substantially parallel to the fourth wall region13. A distance between the fourth wall region13and the fifth wall region32and a distance between the fourth wall region13and the sixth wall region33is constant, in particular over almost the entire extent of the extraction channels30,31, and in the present case is approximately6mm. The fifth wall region32and the sixth wall region33are in this case designed in the form of panels and are respectively connected to the cover2. These wall regions32and33have an extent in terms of height such that, in the operating state of the extraction device1, they come into contact with the sealing element22, so that the respective extraction channel30or32is sealed by the sealing element22on a side facing away from the cover2.

As can be seen for example inFIG.8, the fifth wall region32and the sixth wall region33are respectively connected to the wall26of the extraction region25, which has a clearance35in the region of the longitudinal center plane6, so that the respective extraction channel30,31is directly in contact with the extraction region25. The fifth wall region32extends from the extraction region25substantially parallel to the fourth wall region13into a first peripheral region37of the housing4that is facing away from the longitudinal center plane6. Similarly, the sixth wall region33extends from the extraction region25substantially parallel to the fourth wall region13into a second peripheral region38of the housing that is opposite from the first peripheral region37with respect to the longitudinal center plane6.

Both in the first extraction channel30and in the second extraction channel31, an element40or41that narrows or reduces the size of the flow cross section of the respective extraction channel30or31in the region of the element40or41is arranged in the present case in a region of the respective extraction channel30or31that is facing the first peripheral region37or the second peripheral region38, respectively. In the region of the element40or41, the extraction channel30or31has a width of preferably 2 mm to 3 mm, in particular approximately 2.5 mm, and a height of preferably 10 mm to 20 mm, in particular approximately 15 mm, so that the extraction channel30or31has in this region a cross section of 20 mm2to 60 mm2, in particular of approximately 37.5 mm2. In the operative position of the extraction device1, a cross section of the extraction channel30or31through which a flow can pass is laterally bounded in the region of the respective element40or41by the fifth wall element32or the sixth wall element33, respectively, and the third sealing element22(see, e.g.,FIG.7). On the other hand, the cross section of the extraction channel30or31through which a flow can pass is bounded perpendicularly thereto, in the vertical direction, on the one hand by the respective element40or41and on the other hand by the third sealing element3, which seals the extraction channel30or31in the operative position of the extraction device1on an opposite side. It can be easily ensured by an appropriate cross-sectional design of the extraction channel30or31that for example drilling water located in the cavity7is removed from the cavity7, in particular completely, by way of the extraction channel30or31and the extraction region25.

As can be seen more specifically inFIG.11andFIG.12, an inlet opening44, by way of which drilling water can be fed from the surroundings U (see, e.g.,FIG.4) to the cavity7in the operative position of the extraction device1, is formed in an abutting region of the fourth wall region13adjacent to the first wall region10by a clearance43in the first wall region10. InFIG.12it can be seen that the inlet opening44is arranged substantially underneath the first sealing element20. Comparable to the inlet opening44, an inlet opening formed by a clearance in the second wall region11is provided in the opposite peripheral region of the housing4.

Shown inFIG.13andFIG.14is a further inlet opening45, which is formed by two substantially parallel wall regions47and48of the wall26of the extraction region25at a distance between the first sealing element20and the second sealing element21. Through the further inlet opening45, drilling water that is fed in for example from the surroundings U (see, e.g.,FIG.4) can be passed directly into the extraction region25.

In the operative position of the extraction device1, both the inlet openings44and the further inlet opening45are in particular directly adjacent to the base material, so that drilling water can be easily introduced into the cavity7through the inlet openings44,45.

As shown more specifically for example inFIG.2toFIG.6, the extraction device1has in the present case two sealing devices50,51, which are mounted on the housing4in each case pivotably about a pivot axis57or58, respectively. The sealing devices50,51, designed for example as sealing strips, are in the present case in the form of panels and are made from an elastic and flexible material, for example rubber, and are respectively mounted on a side of the first wall region10or the second wall region11that is facing away from the cavity7. For this purpose, a cylindrical fitting53or54is respectively arranged on the housing4in the form of a holding pin, on which the respective sealing device50,51is fitted by a corresponding cylindrical recess not shown in more detail. An inside diameter of the recess is in this case preferably smaller than an outside diameter of the fitting53or54, so that the sealing device50or51is securely held in the position applicable at the time in each case.

The respective sealing device50or51can be adjusted between the inoperative position, which is shown for example inFIG.4and in which the sealing device50or51is arranged substantially parallel to the wall region10or11, and various operative positions according toFIG.2andFIG.3. The sealing devices50or51can in this case be pivoted independently of one another in the present case with respect to the inoperative position, by an angle of approximately 180° about the pivot axis57or58. In the inoperative position, the extraction device1takes up an advantageously small installation space.

On a side52that is facing a base material in the operative position of the extraction device1, the sealing devices50or51are angled, wherein a peripheral region60that is facing away from the respective fitting53or54has in an inoperative position of the extraction device1a greater extent in the direction of a direction interacting with a base material in the operative position than a region that is facing the fitting53or54. As a result, a sealing contact of the sealing device50or51against the base material is ensured in the operative position of the extraction device by a large achievable surface pressure. Furthermore, such a design of the sealing devices50or51allows unevennesses of a base material and tolerance variations to be compensated.

The extraction device1is intended for interacting with a core drill, for example a diamond drill, wherein the extraction device1may be designed as a holding aid for the extraction device1. The V-shaped design of the first wall region10with respect to the second wall region11has the effect that the extraction device1can preferably be arranged underneath a drill bit of the core drill, in particular directly adjacent to the drill bit, so that drilling water spun off during core drilling can be received by the extraction device1, in particular completely. An appropriate setting of the sealing devices50or51makes it easily achievable that a particularly large proportion of the drilling water spun off from the drill is fed to the extraction device1. An effective width of the extraction device1can be easily increased by the sealing devices50or51in the operative position. Furthermore, sealing can be obtained by means of the sealing devices50or51in the operative position, preferably with respect to a side wall arranged perpendicularly in relation to the wall to be machined.

If the extraction device1is connected by means of the extraction nozzle5to a suction device or a dust collector, a negative pressure is produced in the cavity7when the extraction device1is arranged on a base material, in particular a wall, by which the extraction device1is held firmly and securely against the base material. The negative pressure in the cavity7and the gravitational force have the effect that the drilling water is sucked into the cavity7through the inlet openings44or the further inlet opening45and is removed from the cavity7by way of the extraction region25and the extraction nozzle5.

The shallow V shape of the housing4of the extraction device1has the effect that an angular range of the extraction device1in an arrangement of the extraction device1on a wall, in which the third wall region is arranged at a lower level than the first wall region10and the second wall region11, is relatively small. In this case, the drilling water is fed directly to the extraction region25through the further inlet opening44or is passed through the portions17and18of the fourth wall region13, which are designed to be substantially parallel to the first wall region10and the second wall region11, by gravitational force in the direction of the extraction region25.

In the operative position of the extraction device1, it may be provided that the extraction device is arranged skewed in such a way that the first wall region10or the second wall region11is arranged with a region that is facing the peripheral region37or38of the housing4lower than a region that is facing the longitudinal center plane6. In this case, drilling water would collect in a lateral peripheral region of the cavity7under the effect of gravitational force alone. The provision of the extraction channels30,31ensures that even in this case drilling water is removed from the cavity7, in particular almost completely. As a result, contamination of the wall after removal of the extraction device1from the wall can be prevented.

LIST OF REFERENCE SIGNS

1Extraction device2Cover3Wall4Housing5Extraction nozzle6Longitudinal center plane7Cavity10First wall region11Second wall region12Third wall region13Fourth wall region14Surface of the first wall region15Surface of the second wall region16Angle17Portion of the fourth wall region18Portion of the fourth wall region19Portion of the fourth wall region20First sealing element21Second sealing element22Third sealing element25Extraction region26Wall30First extraction channel31Second extraction channel32Fifth wall region33Sixth wall region35Clearance37First peripheral region of the housing38Second peripheral region of the housing40Element41Element43Clearance44Inlet opening45Further inlet opening47Wall region48Wall region50First sealing device51Second sealing device52Side53Fitting54Fitting57Pivot axis58Pivot axis60Peripheral region100Connecting device101Holding deviceU Surroundings