Coal seam gas pre-extraction device

Abstract

The utility model relates to the technical field of gas extraction, and discloses a coal seam gas pre-extraction device. The coal seam gas pre-extraction device comprises a bottom plate, a supporting frame is fixedly installed above the bottom plate, a supporting piston is fixedly installed above the supporting frame, a limiting seat is fixedly installed above the supporting piston, a fixed anchor is installed in the limiting seat in an embedded mode, a protection plate is installed above the fixed anchor in a penetrating and inserting mode, and the protection plate is fixedly installed above the bottom plate. After the supporting piston extends, the supporting piston moves upwards through the limiting seat, so that the fixing anchor is pushed into a rock stratum, the protection plate is limited to the drilling working face through the fixing anchor, then the supporting piston shrinks to drive the limiting seat to move downwards, the fixing anchor slides out of the top end of the limiting seat, and the protection plate can be fastened at the bottom of the drilling working face in this way; the rock stratum is supported through the protection plate, so that damage to constructors and construction equipment caused by falling of large-size rockfall generated by damage to the rock stratum structure due to drilling is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas extraction technical field, concretely is a coal seam gas pre -extraction device. BACKGROUND

[0002] Coal seam gas is a clean energy, but it is a disaster source for coal mine production. The coal occurrence geological conditions in China are complex, mainly relying on underground mining. With the increase of mining depth, the content of coal seam gas gradually increases, the pressure of coal seam gas increases, the prominent danger increases, and the difficulty of preventing outburst is getting bigger and bigger. Coal seam gas pre -extraction is to carry out strip pre -extraction to the area of the roadway to be excavated before coal roadway excavation.

[0003] The existing reference announcement number CN216617569U Chinese utility model patent discloses a kind of based on PLC's coal seam gas intelligent pre -extraction device, belong to coal seam gas extraction technical field.A kind of based on PLC's coal seam gas intelligent pre -extraction device, including tracked carrier, tracked carrier four corners are equipped with hydraulic lifting support column, tracked carrier top surface is equipped with power module, power module left side is equipped with Siemens S7-200PLC coal seam gas intelligent extraction system, tracked carrier top surface right side is fixed with two hydraulic lifting columns, tracked carrier top surface is hinged with support plate, support plate top surface is fixed with conversion assembly.The utility model is fixed in coal seam mine warehouse interior by hydraulic lifting support column, so that the device coal seam gas pre -extraction is more stable, and by hydraulic lifting column angle adjustment is carried out to support plate, so that the device is suitable for a variety of angles and carries out coal seam gas drilling extraction, greatly improve the flexibility of device.

[0004] The pre -extraction device commonly seen at present needs to carry out drilling operation in the roadway inside mine in the process of use, this process inevitably causes a certain degree of damage to the structure of rock stratum, especially when drilling operation is carried out to roadway top, due to the vibration and pressure variation of drilling, surface stone can be detached, these detached stones can directly fall on the ground of roadway, to form threat to the safety of roadway, in addition, sometimes collapse phenomenon occurs inside drilling, which not only can influence normal flow of gas, but also can lead to drilling being blocked, and then influence gas flow and extraction efficiency. UTILITY MODEL CONTENT

[0005] (1) technical problem solved

[0006] In view of the deficiencies of prior art, the utility model provides a coal seam gas pre -extraction device, with the advantages of preventing stone detachment when drilling on top, and avoiding drilling collapse, etc., solve the above technical problems.

[0007] (ii) Technical Solution

[0008] To achieve the above object, the utility model provides the following technical scheme: a coal bed gas pre -extraction device, include: bottom plate, the top of bottom plate is fixedly installed with support frame, the top of support frame is fixedly installed with support piston, the top of support piston is fixedly installed with limit seat, the inside of limit seat is installed with fixed anchor, the top of fixed anchor is installed with guard plate, the top of bottom plate is fixedly installed with advance piston, the top of advance piston is fixedly installed with bracket, the outside of bracket is fixedly installed with connecting frame, the inside of connecting frame is fixedly installed with drive motor, the outer side of the rotating shaft of drive motor is fixedly installed with gear, the top of bracket is fixedly installed with pressure bearing, the top of pressure bearing is fixedly installed with gear disc, the top of gear disc is installed with drive pipe, the top of drive pipe is movably installed with connecting pipe, the top of connecting pipe is movably installed with drill bit, drive motor can drive gear to rotate.

[0009] As the preferred technical scheme of the utility model, the support piston is symmetrical and installed on the top surface of the support frame at four corners with the center of the support frame as the reference, and the top of the limit seat is provided with a recess structure matched with the fixed anchor; the support piston can drive the limit seat to move.

[0010] As the preferred technical scheme of the utility model, the fixed anchor is matched in the inside of the limit seat and forms a sliding connection with the limit seat, the four corners of the guard plate are provided with openings matched with the fixed anchor, and the guard plate forms a sliding connection with the fixed anchor; the fixed anchor can limit the guard plate in the drilling plane.

[0011] As the preferred technical scheme of the utility model, the advance piston is symmetrical and installed on the top of the bottom plate with the center of the bracket as the reference, the bracket forms a movable connection between the advance piston and the bottom plate, the bottom end of the bracket is disc-shaped and provided with a tubular protruding structure at the center; the bracket can facilitate the advance piston to drive the drive pipe to move upwards.

[0012] As the preferred technical scheme of the utility model, the drive motor is fixedly connected with the bracket through the tubular protrusion of the connecting frame, the inner diameter of the pressure bearing is consistent with the inner diameter of the tubular protruding structure of the bracket, and the gear disc forms a rotary connection between the pressure bearing and the bracket; the pressure bearing can reduce the friction between the gear disc and the bracket.

[0013] As the preferred technical scheme of the utility model, the top surface of the gear disc is provided with a protruding structure, the bottom end of the drive pipe is provided with a recess matched with the protruding structure of the gear disc, and the top end inner wall of the drive pipe is provided with an internal thread; the gear disc can drive the drive pipe to rotate.

[0014] As the preferred technical scheme of the utility model, the bottom end outside of the connecting pipe is provided with external thread, the top end inside is provided with internal thread, the bottom end outside of the drill bit is provided with external thread, the driving pipe, the connecting pipe, the drill bit are connected through the thread structure, the drill bit can destroy the rock structure when rotating.

[0015] Compared with the prior art, the utility model provides a coal seam gas pre - extraction device has the following beneficial effects:

[0016] 1, the utility model discloses a setting of the protection board, the protection board is inserted in the upper of fixed anchor through the opening structure of protection board four corners, and fixed anchor is movably installed at the top of support piston through the limiting seat, and the bottom of fixed anchor is discoid, and after the elongation of support piston, it will move up through the limiting seat, thereby the fixed anchor is pushed into the rock layer, and the protection board is limited in the drilling face through the fixed anchor, and then the support piston contracts, drives the limiting seat to move down, and the fixed anchor will slide out from the top of limiting seat, which can fasten the protection board at the bottom of drilling face, and the rock layer is supported through the protection board to prevent the damage of large volume rockfall falling to construction personnel and construction equipment due to the drilling of rock layer structure.

[0017] 2, the utility model discloses a setting of the toothed disc, and the toothed disc is rotatably connected between the pressure bearing and the bracket, the top surface inside of toothed disc is provided with convex structure, and the bottom of driving pipe is provided with recess that is embedded with the convex structure of toothed disc, and the pressure bearing can axial force, so that the driving pipe, the connecting pipe and the drill bit are exerted with the force of the advancing piston, the toothed disc and the gear are engaged with each other, when the gear is rotated by the driving motor, the toothed disc will drive the driving pipe to rotate, the bottom of driving pipe is provided with the opening structure that is annularly distributed with the center of driving pipe as the reference, so as to connect the driving pipe and the protection board through the bolt, the drilling depth is increased by adding multiple connecting pipes through the thread structure, and the drillings can fall on the top of bottom plate through the drill bit, the connecting pipe and the driving pipe of tubular structure after drilling, the driving pipe and the protection board are connected through the bolt after drilling, the driving pipe and the toothed disc are separated by the contraction of the advancing piston, and the driving pipe, the connecting pipe and the drill bit are left in the drilling, which avoids the influence of gas flow due to the collapse of drilling. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is overall structure schematic diagram of the utility model;

[0019] Figure 2 It is fixed anchor mounting structure schematic diagram of the utility model;

[0020] Figure 3 It is bracket mounting structure schematic diagram of the utility model;

[0021] Figure 4 It is driving pipe and toothed disc connection structure schematic diagram of the utility model;

[0022] Wherein: 1, the bottom plate; 11, support frame; 12, support piston; 13, limit seat; 14, fixed anchor; 15, guard plate; 16, push piston; 17, bracket; 18, connecting frame; 19, drive motor; 110, gear; 111, pressure bearing; 112, toothed disc; 113, drive pipe; 114, connecting pipe; 115, drill bit. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0024] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; It can be mechanically connected, or it can be electrically connected; It can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Please refer to Figure 1 - Figure 4In this embodiment, a coal seam gas pre-extraction device includes a base plate 1, a support frame 11 fixedly installed above the base plate 1, a support piston 12 fixedly installed above the support frame 11, a limiting seat 13 fixedly installed above the support piston 12, a fixed anchor 14 embeddedly installed in the limiting seat 13, a protective plate 15 insertedly installed above the fixed anchor 14, a pushing piston 16 fixedly installed above the base plate 1, a bracket 17 fixedly installed above the pushing piston 16, a connecting frame 18 fixedly installed on the outer side of the bracket 17, a drive motor 19 fixedly installed in the connecting frame 18, a gear 110 fixedly installed on the outer side of the rotating shaft of the drive motor 19, a pressure bearing 111 fixedly installed at the top end of the bracket 17, a toothed disc 112 fixedly installed above the pressure bearing 111, a drive pipe 113 embeddedly installed above the toothed disc 112, a connecting pipe 114 movably installed at the top end of the drive pipe 113, and a drill bit 115 movably installed at the top end of the connecting pipe 114.

[0027] The four support pistons 12 are symmetrically installed at the four corners of the top surface of the support frame 11 with the center of the support frame 11 as the reference. The top end of the limiting seat 13 is provided with a recess structure embedded with the fixed anchor 14, and the fixed anchor 14 is embedded in the limiting seat 13 and connected with the limiting seat 13 in a sliding manner. The four corners of the protective plate 15 are provided with openings embedded with the fixed anchor 14, and the protective plate 15 is connected with the fixed anchor 14 in a sliding manner. The four pushing pistons 16 are symmetrically installed above the base plate 1 with the center of the bracket 17 as the reference. The bracket 17 is movably connected with the base plate 1 through the pushing pistons 16. The bottom end of the bracket 17 is disc-shaped and provided with a tubular protruding structure at the center. The drive motor 19 is fixedly connected with the bracket 17 through the connecting frame 18. The inner diameter of the pressure bearing 111 is consistent with the inner diameter of the tubular protruding structure of the bracket 17. The toothed disc 112 is rotatably connected with the bracket 17 through the pressure bearing 111. The top surface of the toothed disc 112 is provided with a protruding structure on the inner side. The bottom end of the drive pipe 113 is provided with a recess embedded with the protruding structure of the toothed disc 112. The top end of the drive pipe 113 is provided with an internal thread on the inner wall. The bottom end of the connecting pipe 114 is provided with an external thread on the outer side and an internal thread on the inner side. The bottom end of the drill bit 115 is provided with an external thread. The drive pipe 113, the connecting pipe 114, and the drill bit 115 are movably connected through the thread structure.

[0028] Specifically, the model of the driving motor 19 is YBX4, the bottom plate 1 can limit the position of the support frame 11, the four legs at the bottom of the support frame 11 can lift the position of the support piston 12, so that the support piston 12 pushes the anchor 14 into the drilling plane when it is stretched, the anchor 14 is movably installed at the top end of the support piston 12 through the limiting seat 13, and the bottom end of the anchor 14 is disc-shaped, the protective plate 15 is inserted above the anchor 14 through the four-corner opening structure of the protective plate 15, and the anchor 14 will be pushed into the rock layer after the support piston 12 is stretched and moves upward through the limiting seat 13, so as to limit the protective plate 15 on the drilling working surface through the anchor 14, and then the support piston 12 is retracted to move the limiting seat 13 downward, the advancing piston 16 can drive the bracket 17 to move upward, the tubular structure at the center of the bracket 17 can support the gear disc 112 and facilitate the discharge of the rock debris generated during drilling, the gear disc 112 is rotatably connected with the bracket 17 through the pressure bearing 111, the pressure bearing 111 can bear axial force, so that the advancing piston 16 applies upward force to the driving pipe 113, the connecting pipe 114 and the drill bit 115, the gear disc 112 is meshed with the gear 110, when the driving motor 19 drives the gear 110 to rotate, the gear disc 112 will drive the driving pipe 113 to rotate, the bottom end of the driving pipe 113 is provided with an opening structure distributed in a ring shape with the center of the driving pipe 113 as a reference, so as to connect the driving pipe 113 with the protective plate 15 through bolts, a plurality of connecting pipes 114 are stacked through the threaded structure to increase the drilling depth, and the drill bit 115 can drill the rock layer.

[0029] In use, the protective plate 15 is inserted above the anchor 14 by the four-cornered opening structure of the protective plate 15, the anchor 14 is movably installed at the top end of the support piston 12 through the limiting seat 13, and the bottom end of the anchor 14 is disc-shaped, which will move upward through the limiting seat 13 after the support piston 12 is elongated, so as to push the anchor 14 into the rock stratum, and the protective plate 15 is limited on the drilling face by the anchor 14, then the support piston 12 is retracted to drive the limiting seat 13 to move downward, and the anchor 14 will slide out of the top end of the limiting seat 13, which can fasten the protective plate 15 at the bottom of the drilling face, support the rock stratum through the protective plate 15, and prevent large-volume rockfalls caused by drilling from damaging the rock stratum structure and causing damage to construction personnel and construction equipment, the gear disc 112 is rotatably connected between the pressure bearing 111 and the bracket 17, the top surface of the gear disc 112 is provided with a protruding structure, the bottom end of the drive pipe 113 is provided with a recess matched with the protruding structure of the gear disc 112, the pressure bearing 111 can bear axial force, so that the driving piston 16 applies upward force to the drive pipe 113 and the connecting pipe 114 and the drill bit 115, the gear disc 112 is meshed with the gear 110, when the gear 110 is driven to rotate by the driving motor 19, the gear disc 112 will drive the drive pipe 113 to rotate, the bottom end of the drive pipe 113 is provided with an opening structure distributed in a ring shape with the center of the drive pipe 113 as a reference, so as to connect the drive pipe 113 and the protective plate 15 through bolts, the drilling depth is increased by stacking multiple connecting pipes 114 through threaded structures, and the drillings generated during drilling can fall above the bottom plate 1 through the tubular drill bit 115, the connecting pipe 114, the drive pipe 113 and the bracket 17, after drilling is completed, the drive pipe 113 is connected with the protective plate 15 through bolts, the driving piston 16 is retracted to separate the drive pipe 113 from the gear disc 112, and the drive pipe 113 and the connecting pipe 114 and the drill bit 115 are left in the drilling hole, so as to avoid the influence of drilling collapse on gas flow.

[0030] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A coal seam gas pre-extraction device, characterized by, The utility model relates to a coal seam gas pre -extraction device, including: The bottom plate (1) is fixedly installed with the support frame (11) on the top, the support frame (11) is fixedly installed with the support piston (12) on the top, the support piston (12) is fixedly installed with the limit seat (13) on the top, the limit seat (13) is embeddedly installed with the fixed anchor (14) in the inside, the fixed anchor (14) is insertedly installed with the protective plate (15) on the top, the bottom plate (1) is fixedly installed with the advance piston (16) on the top, the advance piston (16) is fixedly installed with the bracket (17) on the top, the bracket (17) is fixedly installed with the connecting frame (18) on the outside, the connecting frame (18) is fixedly installed with the drive motor (19) in the inside, the drive motor (19) is fixedly installed with the gear (110) on the rotating shaft outside, the bracket (17) is fixedly installed with the pressure bearing (111) on the top, the pressure bearing (111) is fixedly installed with the toothed disc (112) on the top, the toothed disc (112) is embeddedly installed with the drive pipe (113) on the top, the drive pipe (113) is movably installed with the connecting pipe (114) on the top, the connecting pipe (114) is movably installed with the drill bit (115) on the top.

2. The coal seam gas pre-extraction device according to claim 1, wherein: The support piston (12) is symmetrically installed on the top surface of the support frame (11) at four corners with the center of the support frame (11) as the reference, and the top end of the limit seat (13) is provided with a recess structure embedded with the fixed anchor (14).

3. The coal seam gas pre-extraction device according to claim 1, wherein: The fixed anchor (14) is embedded in the limit seat (13) and forms a sliding connection with the limit seat (13), and the four corners of the protective plate (15) are provided with openings embedded with the fixed anchor (14), and the protective plate (15) forms a sliding connection with the fixed anchor (14).

4. The coal seam gas pre-extraction device according to claim 1, wherein: The advance piston (16) is symmetrically installed on the top of the bottom plate (1) with the center of the bracket (17) as the reference, and the bracket (17) forms a movable connection with the bottom plate (1) through the advance piston (16), the bottom end of the bracket (17) is disc-shaped, and the center is provided with a tubular protruding structure.

5. The coal seam gas pre-extraction device according to claim 1, wherein: The drive motor (19) is fixedly connected with the tubular protrusion of the bracket (17) through the connecting frame (18), the inner diameter of the pressure bearing (111) is consistent with the inner diameter of the tubular protruding structure of the bracket (17), and the toothed disc (112) forms a rotary connection with the bracket (17) through the pressure bearing (111).

6. The coal seam gas pre-extraction device according to claim 1, wherein: The top surface of the tooth disc (112) is provided with a convex structure, the bottom end of the driving pipe (113) is provided with a recess which is matched with the convex structure of the tooth disc (112), and the inner wall of the top end of the driving pipe (113) is provided with an internal thread.

7. The coal seam gas pre-extraction device according to claim 1, characterized in that: The bottom end of the connecting pipe (114) is provided with an external thread on the outer side, and the top end is provided with an internal thread on the inner side, the bottom end of the drill bit (115) is provided with an external thread on the outer side, and the driving pipe (113), the connecting pipe (114) and the drill bit (115) are movably connected through the thread structure.

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