A device for directional cutting of a seam in a borehole for caving of a face end roof

Abstract

The utility model provides a kind of directional cutting seam device in drilling of working face end head roof roof fall, including bottom plate and drill rod, the top of bottom plate is fixed and set up with the roof parallel with it, slidingly set between bottom plate and roof lifting plate, lifting drive mechanism for driving lifting plate to move up and down is provided on roof, and centering clamping mechanism for clamping or releasing drill rod is provided on roof and lifting plate;The top of roof is provided with recovery hopper, and the top of roof is provided with telescopic mechanism for driving recovery hopper to move up and down;The upper end of drill rod is provided with cutting seam spray head;In the utility model, telescopic mechanism drives recovery hopper to move up, so that the top of recovery hopper abuts against roof, without manually installing recovery hopper, saving manpower, and mortar flowing in drilling is recycled into recovery hopper interior;Telescopic mechanism provides stable support to the below of recovery hopper, avoids displacement of recovery hopper to affect work, and avoids affecting work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of mining production technology, specifically relating to a directional cutting device for drilling holes for the release of the top plate at the end of a working face. Background Technology

[0002] High-pressure water jet technology is widely used in mining production. For goaf-side roadways, high-pressure water jet technology is used for hydraulic grooving, promoting crack propagation and stress relief, thereby reducing stress concentration above the coal pillar and maintaining the stability of the roadway support. For deep, high-gas, low-permeability coal seams, high-pressure water jet technology is used for segmented grooving and stress relief in gas drainage boreholes. This not only relieves pressure on the coal seam itself but also overcomes limitations imposed by geological conditions, while increasing the exposed surface area of ​​the borehole, promoting gas escape, and thus improving gas drainage efficiency.

[0003] In the prior art, Chinese utility model patent document with authorization announcement number CN212690008U discloses a coal seam roof directional cutting device based on hydraulic cutting technology. It uses a recovery funnel to receive mortar left along the inner wall of the borehole during the cutting process. The recovery funnel is hooked to the wire mesh used to support the roof by a hook. The stability is poor. When the drill rod moves up and down, it causes the recovery funnel to shake, which can easily cause it to fall off the hook, affecting the mortar reception. Moreover, it is necessary to stop the work to reset the recovery funnel, which affects the work efficiency.

[0004] Therefore, a drilling directional cutting device is needed to improve the stability of mortar recycling and avoid affecting work efficiency when laying the top plate at the end of the working face to solve the current technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a drilling directional cutting device for improving the stability of mortar recycling and avoiding impact on work efficiency when the top plate of the working face is being laid.

[0006] The technical solution of this utility model is as follows: a drilling directional cutting device with a top plate at the working face end, comprising a base plate and a drill rod. A top plate parallel to the base plate is fixedly mounted above the base plate. A lifting plate is slidably arranged between the base plate and the top plate. A lifting drive mechanism for driving the lifting plate to move up and down is provided on the top plate. A centering clamping mechanism for clamping or releasing the drill rod is provided on both the top plate and the lifting plate. A recovery hopper is provided above the top plate. A telescopic mechanism for driving the recovery hopper to move up and down is provided on the top of the top plate. A cutting nozzle is provided at the upper end of the drill rod.

[0007] Furthermore, the recovery hopper has a hopper body, and a liquid collection tank connected to the bottom end of the hopper body is provided. A pipe joint connected to the bottom of one side of the liquid collection tank is provided. A through hole matching the drill rod is opened at the bottom of the liquid collection tank.

[0008] Furthermore, a rubber sealing ring is provided concentrically with the through hole at the inner bottom of the liquid collection tank, and the rubber sealing ring is pressed and fixed to the inner bottom of the liquid collection tank by a pressure ring.

[0009] Furthermore, the rubber sealing ring has a sealing cone, the inner side of which abuts against the outer side of the drill rod, and a fixing ring is fixedly provided on the outer side of the sealing cone. The fixing ring is located between the pressure ring and the inner bottom of the liquid collection tank. The pressure ring and the inner bottom of the liquid collection tank are detachably fixedly connected by a bolt and nut mechanism.

[0010] Furthermore, the telescopic mechanism has telescopic electric cylinders symmetrically fixed on both sides of the bottom of the recycling hopper, and a portal frame is fixedly installed at the bottom end of the telescopic electric cylinder, which is fixedly installed on the top of the top plate.

[0011] Furthermore, the lifting drive mechanism has a lead screw rotatably disposed between the top plate and the bottom plate, a drive motor for driving the lead screw to rotate is disposed on the top plate, and the lifting plate is threadedly connected to the lead screw.

[0012] Furthermore, guide rods are evenly arranged on the top of the base plate, the top plate is fixedly arranged on the top of the guide rods, and the lifting plate is slidably connected to the guide rods.

[0013] Furthermore, the centering clamping mechanism has two slide rods symmetrically mounted on the top plate and the top of the lifting plate. An active gripper and a driven gripper are slidably mounted on the outer side of the slide rods. An active rack is vertically fixed on one end of the active gripper near the driven gripper, and a driven rack is vertically fixed on one end of the driven gripper away from the active gripper. A gear is rotatably mounted between the active rack and the driven rack, and both the active rack and the driven rack mesh with the gear. A clamping electric cylinder is mounted on the side of the active gripper away from the driven gripper to drive its reciprocating movement.

[0014] Furthermore, supports are fixedly provided at both ends of the slide rod, and a sliding plate is vertically fixedly provided at one end of the driven rack away from the driven gripper, and the sliding plate is slidably connected to the two slide rods.

[0015] Furthermore, four support rods are evenly arranged around the top plate.

[0016] The beneficial effects of this utility model are:

[0017] (1) In this utility model, the telescopic mechanism drives the recycling bucket to move upward, so that the top of the recycling bucket abuts against the top plate. No manual installation of the recycling bucket is required, saving manpower. The slurry flowing out of the drill hole enters the inside of the recycling bucket for recycling.

[0018] (2) The telescopic mechanism provides stable support to the bottom of the recycling bucket to prevent the recycling bucket from shifting and affecting the work, thus avoiding affecting work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the drilling directional cutting device for the top plate of the working face in this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the recycling hopper in this utility model.

[0021] Figure 3 for Figure 2 Cross-sectional view at point AA.

[0022] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0023] Figure 5 This is a schematic diagram of the centering and clamping mechanism in this utility model. Detailed Implementation

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0025] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] like Figures 1 to 5As shown, a drilling directional cutting device for a working face end top plate is disclosed, including a base plate 1 and a drill rod 7. A top plate 2 parallel to the base plate 1 is fixedly mounted above the base plate 1. A lifting plate 3 is slidably arranged between the base plate 1 and the top plate 2. A lifting drive mechanism 4 for driving the lifting plate 3 to move up and down is provided on the top plate 2. A centering clamping mechanism 9 for clamping or releasing the drill rod is provided on both the top plate 2 and the lifting plate 3. A recovery bucket 5 is provided above the top plate 2. A telescopic mechanism 6 for driving the recovery bucket to move up and down is provided on the top of the top plate 2. A cutting nozzle 8 is provided at the upper end of the drill rod 7.

[0027] In the above embodiment, before cutting the kerf, the axis of the drill rod 7 is aligned with the axis of the borehole. The centering clamping mechanism 9 on the lifting plate 3 clamps and fixes the drill rod 7, and the centering clamping mechanism 9 on the top plate 2 releases the drill rod. The lifting drive mechanism 4 drives the lifting plate 3 to move upward to the first position, sending the drill rod 2 into the borehole. Then, the centering clamping mechanism 9 on the top plate 2 clamps and fixes the drill rod 7, and the centering clamping mechanism 9 on the lifting plate 3 releases the drill rod. The lifting drive mechanism 4 drives the lifting plate 3 to move downward to the second position, connecting another drill rod to the lower end of the drill rod clamped by the centering clamping mechanism 9 on the top plate 2. After the drill rod 7 and the other drill rod 7 are installed, the lifting drive mechanism 4 drives the lifting plate 3 to move up to the third position. At this time, the centering clamping mechanism 9 on the lifting plate 3 clamps and fixes the lower end of the newly installed drill rod 7. The centering clamping mechanism 9 on the top plate 2 releases the drill rod, and the lifting drive mechanism 4 drives the lifting plate 3 to move up to the first position, sending the drill rod 2 into the borehole. The drill rod 7 is installed and lifted in sequence according to the above steps until the cutting nozzle 8 reaches the designed depth inside the borehole. The drill rod 7 is a hollow drill rod, and its lower end is connected to the water sand flow generating device through a high-pressure pipeline to supply cutting mortar to the cutting nozzle 8. During cutting, the telescopic mechanism 6 drives the recovery hopper 5 to move up, so that the top of the recovery hopper 5 abuts against the top plate. There is no need for manual installation of the recovery hopper 5, saving manpower. The mortar flowing out of the borehole enters the recovery hopper 5 for recovery. The telescopic mechanism 6 provides stable support for the recovery hopper 5 from below, preventing the recovery hopper 5 from shifting and affecting the work, thus avoiding affecting work efficiency.

[0028] In some embodiments, such as Figures 2 to 3 As shown, the recovery hopper 5 has a hopper body 51, and a liquid collection tank 52 connected to the bottom of the hopper body 51 is provided. A pipe joint 53 connected to the bottom of one side of the liquid collection tank 52 is provided. A through hole matching the drill rod 7 is opened at the bottom of the liquid collection tank 52. The slurry received by the hopper body 51 flows into the interior of the liquid collection tank 52 along its interior. The pipe joint 53 is connected to the return pipeline.

[0029] In some embodiments, a rubber sealing ring 54 is provided concentrically with the through hole at the inner bottom of the liquid collection tank 52. The rubber sealing ring 54 is pressed and fixed to the inner bottom of the liquid collection tank 52 by a pressure ring 55. After the rubber sealing ring 54 wears out, the pressure ring 55 can be removed to replace the rubber sealing ring 54.

[0030] In some embodiments, such as Figure 4 As shown, the rubber sealing ring 54 has a sealing cone 541. The inner side of the sealing cone 541 abuts against the outer side of the drill rod 7. A fixing ring 542 is fixedly provided on the outer side of the sealing cone 541. The fixing ring 542 is located between the pressure ring 55 and the inner bottom of the liquid collection tank 52. The pressure ring 55 and the inner bottom of the liquid collection tank 52 are detachably fixedly connected by a bolt and nut mechanism.

[0031] In some embodiments, the telescopic mechanism 6 has telescopic electric cylinders 62 symmetrically fixed on both sides of the bottom of the recycling hopper 5, and a portal frame 61 is fixedly installed at the bottom end of the telescopic electric cylinder 62, and the portal frame 61 is fixedly installed on the top of the top plate 2.

[0032] In some embodiments, the lifting drive mechanism 4 has a lead screw 41 rotatably disposed between the top plate 2 and the bottom plate 1, and a drive motor 42 for driving the lead screw 41 to rotate is disposed on the top plate 2, and the lifting plate 3 is threadedly connected to the lead screw 41; the drive motor 42 drives the lead screw 41 to rotate, and the lead screw 41 drives the lifting plate 3 to move up and down; more specifically, the drive motor 42 is a servo motor.

[0033] In some embodiments, guide rods 43 are evenly arranged on the top of the base plate 1, the top plate 2 is fixedly arranged on the top of the guide rods 43, and the lifting plate 3 is slidably connected to the guide rods 43.

[0034] In some embodiments, such as Figure 5 As shown, the centering clamping mechanism 9 has two sliding rods 97 symmetrically mounted on the top of the top plate 2 and the lifting plate 3. An active gripper 91 and a driven gripper 92 are slidably fitted onto the outer side of each sliding rod 97. An active rack 93 is vertically fixed to one end of the active gripper 91 near the driven gripper 92, and a driven rack 94 is vertically fixed to one end of the driven gripper 92 away from the active gripper 91. A toothed mechanism is rotatably positioned between the active rack 93 and the driven rack 94. Wheel 95, drive rack 93, and driven rack 94 all mesh with gear 95. On the side of drive chuck 91 away from driven chuck 92, a clamping electric cylinder 96 is provided to drive its reciprocating movement. While the clamping electric cylinder 96 drives drive chuck 91 to move, drive chuck 91 is linked by drive rack 93, gear 95, and driven rack 94 to drive driven chuck 92 to move closer or further away from drive chuck 91 in sync, ensuring that the position of drill rod 7 is fixed after clamping.

[0035] In some embodiments, both ends of the slide bar 97 are fixedly provided with supports 98, and the driven rack 94 is vertically fixedly provided with a slide plate 99 at one end away from the driven gripper 92, and the slide plate 99 is slidably connected to the two slide bars 97.

[0036] In some embodiments, four support rods 21 are evenly arranged around the top plate 2. The top end of the support rod 21 is hinged to the top plate 2, and the bottom end of the support rod 21 abuts against the ground, thereby improving the stability of the device.

[0037] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0038] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A drilling directional cutting device for the top plate of a working face, characterized in that: The system includes a base plate and a drill rod. A top plate, parallel to the base plate, is fixedly mounted on top of the base plate. A lifting plate is slidably arranged between the base plate and the top plate. A lifting drive mechanism is provided on the top plate to drive the lifting plate to move up and down. A centering clamping mechanism for clamping or releasing the drill rod is provided on both the top plate and the lifting plate. A recycling hopper is provided above the top plate, and a telescopic mechanism for driving the recycling hopper to move up and down is provided on the top of the top plate. The upper end of the drill rod is equipped with a slit-cutting nozzle.

2. The drilling directional cutting device for the top plate of the working face as described in claim 1, characterized in that: The recovery hopper has a hopper body, and a liquid collection tank connected to the bottom of the hopper body is provided. A pipe joint connected to the bottom of one side of the liquid collection tank is provided. A through hole matching the drill rod is opened at the bottom of the liquid collection tank.

3. The drilling directional cutting device for the top plate of the working face as described in claim 2, characterized in that: A rubber sealing ring is provided concentrically with the through hole at the inner bottom of the liquid collection tank, and the rubber sealing ring is pressed and fixed to the inner bottom of the liquid collection tank by a pressure ring.

4. The drilling directional cutting device for the top plate of the working face as described in claim 3, characterized in that: The rubber sealing ring has a sealing cone, the inner side of which abuts against the outer side of the drill rod. A fixing ring is fixedly provided on the outer side of the sealing cone, and the fixing ring is located between the pressure ring and the inner bottom of the liquid collection tank. The pressure ring and the inner bottom of the liquid collection tank are detachably fixedly connected by a bolt and nut mechanism.

5. The drilling directional cutting device for the top plate of the working face as described in claim 1, characterized in that: The telescopic mechanism has telescopic electric cylinders symmetrically fixed on both sides of the bottom of the recycling hopper. A portal frame is fixedly installed at the bottom of the telescopic electric cylinder, and the portal frame is fixedly installed on the top of the top plate.

6. The drilling directional cutting device for the top plate of the working face as described in claim 1, characterized in that: The lifting drive mechanism has a lead screw rotatably disposed between the top plate and the bottom plate, a drive motor for driving the lead screw to rotate is disposed on the top plate, and the lifting plate is threadedly connected to the lead screw.

7. The drilling directional cutting device for the top plate of the working face as described in claim 1, characterized in that: Guide rods are evenly arranged on the top of the base plate, the top plate is fixedly arranged on the top of the guide rods, and the lifting plate is slidably connected to the guide rods.

8. The drilling directional cutting device for the top plate of the working face as described in claim 1, characterized in that: The centering clamping mechanism has two sliding rods symmetrically mounted on the top plate and the top of the lifting plate. An active clamping jaw and a driven clamping jaw are slidably mounted on the outer side of the sliding rods. An active rack is vertically fixed on one end of the active clamping jaw near the driven clamping jaw, and a driven rack is vertically fixed on one end of the driven clamping jaw away from the active clamping jaw. A gear is rotatably mounted between the active rack and the driven rack, and both the active rack and the driven rack mesh with the gear. A clamping electric cylinder is mounted on the side of the active clamping jaw away from the driven clamping jaw to drive its reciprocating movement.

9. The drilling directional cutting device for the top plate of the working face as described in claim 8, characterized in that: Both ends of the slide rod are fixedly provided with supports, and a sliding plate is vertically fixedly provided on the driven rack at the end opposite to the driven gripper. The sliding plate is slidably connected to the two slide rods.

10. The drilling directional cutting device for the top plate of the working face as described in claim 1, characterized in that: Four support rods are evenly arranged around the top plate.

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