Hole protecting device for soft coal seam gas extraction drilling

Abstract

The utility model discloses a soft coal seam gas extraction drilling hole protection device, which relates to the technical field of coal mining, and comprises two bases, the upper surfaces of the two bases are fixedly connected with a U-shaped plate together, a moving plate is arranged below the U-shaped plate, an adjusting mechanism is arranged between the moving plate and the U-shaped plate, and the adjusting mechanism is connected with the U-shaped plate. The moving plate moves through an adjusting mechanism, and the upper surface of the moving plate is fixedly connected with a first motor. The protection pipe is installed on the lower surface of the movable plate, then the movable plate is moved downwards, so that the protection pipe can be moved to the underground in the drilling process, when the protection pipe is about to sink into the ground, the protection pipe is detached, then the movable plate is moved upwards, and then a new protection pipe is installed again. And the new protection pipe is pressed above the protection pipe in the ground, so that a protection pipeline can be formed by repeatedly utilizing a plurality of protection pipes.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mining, specifically relates to a soft coal seam gas extraction drilling hole protection device. BACKGROUND

[0002] As a byproduct in the process of gas extraction in coal mines, the advance extraction of gas in the process of coal mine safety production can not only improve the mining efficiency of coal mines, but also effectively solve the problem of gas affecting coal mine safety production.

[0003] The current gas extraction technology of gas mines is to drill a hole in the extraction working face, then extend the pipeline generating negative pressure to the vicinity of the orifice of the extraction drilling hole, and then extract, and in the process of drilling, the extraction hole needs to be pre-drilled, reamed and other processes, but due to the characteristics of loose structure and low strength of soft coal seam, drilling collapse and deformation problems are prone to occur during gas extraction drilling, which leads to mine disasters. UTILITARIAN CONTENT

[0004] In view of the problems existing in the above-mentioned gas extraction opening technology, the utility model is proposed.

[0005] Therefore, the utility model aims at providing a soft coal seam gas extraction drilling hole protection device, which solves the problem that due to the characteristics of loose structure and low strength of soft coal seam, drilling collapse and deformation problems are prone to occur during gas extraction drilling, which leads to mine disasters.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A soft coal seam gas extraction drilling hole protection device, comprising two bases, the upper surfaces of the two bases are fixedly connected with a U-shaped plate, a moving plate is arranged below the U-shaped plate, an adjusting mechanism is arranged between the moving plate and the U-shaped plate, the moving plate moves through the adjusting mechanism, a first motor is fixedly connected to the upper surface of the moving plate, the output end of the first motor penetrates the upper surface of the moving plate and is provided with a drilling mechanism, a protective tube is arranged on the outer surface of the drilling mechanism, a fixing mechanism is arranged between the protective tube and the moving plate, and the protective tube is fixed through the fixing mechanism.

[0008] Preferably, the adjusting mechanism comprises a second motor, a driving gear, two driven gears, two sleeves and two lead screws, the second motor is fixedly connected to the upper surface of the U-shaped plate, the output end of the second motor penetrates through the upper surface of the U-shaped plate, the driving gear is fixedly sleeved on the output end of the second motor, the upper surface of the U-shaped plate is provided with a circular hole, two sleeves are rotatably connected to the inner part of the corresponding circular hole respectively, the inner part of the two sleeves is provided with an internal threaded hole, the two lead screws are threadedly arranged in the inner part of the corresponding internal threaded hole respectively, the lower ends of the two lead screws are fixedly connected to the upper surface of the moving plate symmetrically, and the two driven gears are fixedly sleeved on the outer surface of the sleeves and meshed with the driving gear.

[0009] Preferably, the drilling mechanism comprises two connecting rods, two clamping blocks, two first bolts and a drill bit, the two clamping blocks are fixedly connected to the upper ends of the corresponding connecting rods respectively, the two clamping blocks are sleeved on the output end of the second motor and the rod wall of the connecting rod respectively, the two first bolts are arranged on the side of the corresponding clamping block respectively, and the drill bit is fixedly connected to the lower end of the corresponding connecting rod.

[0010] Preferably, the fixing mechanism comprises an annular clamping plate and two second bolts, the annular clamping plate is fixedly connected to the lower surface of the moving plate, the protection pipe is sleeved on the outer surface of the moving plate, the second bolts are arranged on the two sides of the protection pipe, and the protection pipe is fixedly connected to the outer surface of the annular clamping plate through the two second bolts.

[0011] Preferably, the upper ends of the two lead screws are fixedly connected with limiting blocks.

[0012] Preferably, the lower surfaces of the two bases are fixedly connected with two universal wheels.

[0013] In the above technical scheme, the technical effects and advantages of the utility model are provided:

[0014] 1. The utility model discloses a protection pipe can be moved to the ground bottom in the process of drilling, and when the protection pipe is about to sink into the ground, the protection pipe is disassembled, then the moving plate is moved upwards, then a new protection pipe is reinstalled and is pressed above the old protection pipe in the ground, so that a protection pipeline can be formed by reciprocating use of multiple protection pipes.

[0015] 2. The utility model discloses a second motor is started, the driving gear is rotated, then the driven gear can be rotated, then the two sleeves can be rotated, then the two lead screws are moved downwards and drive the moving plate to move downwards. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical personnel in the art better understand the technical scheme of the present application, the following will be further described in detail with reference to the drawings.

[0017] Figure 1 It is a three-dimensional structure schematic view of the present application;

[0018] Figure 2 It is a three-dimensional structure schematic view of the present application; Figure 1 It is a front view sectional view of the present application;

[0019] Figure 3 It is a three-dimensional structure schematic view of the present application; Figure 2

[0020] Explanation of reference signs:

[0021] 1, base; 2, U-shaped plate; 3, moving plate; 4, first motor; 5, protective tube; 6, second motor; 7, driving gear; 8, driven gear; 9, sleeve; 10, screw rod; 11, connecting rod; 12, clamping block; 13, first bolt; 14, drill bit; 15, annular clamping plate; 16, second bolt; 17, limiting block; 18, universal wheel. DETAILED DESCRIPTION

[0022] In order to make the technical personnel in the art better understand the technical scheme of the present application, the following will be further described in detail with reference to the drawings.

[0023] The embodiment of the present application discloses a soft coal seam gas extraction drilling hole protection device.

[0024] The present application provides a kind of soft coal seam gas extraction drilling hole protection device as shown in Figures 1-3 The present application provides a kind of soft coal seam gas extraction drilling hole protection device as shown in

[0025] ​The protection tube 5 is installed on the lower surface of the moving plate 3, then the moving plate 3 is moved downward, so that the protection tube 5 can be moved to the ground during the drilling process, when the protection tube 5 is about to sink into the ground, the protection tube 5 is disassembled, then the moving plate 3 is moved upward, then a new protection tube 5 is reinstalled and pressed above the protection tube 5 in the ground, and the above-mentioned reciprocating use of multiple protection tubes 5 can form a protection pipeline.

[0026] In order to make the moving plate 3 move downward, as shown in Figures 1-2 The adjusting mechanism comprises a second motor 6, a driving gear 7, two driven gears 8, two sleeves 9 and two lead screws 10, the second motor 6 is fixedly connected to the upper surface of the U-shaped plate 2, the output end of the second motor 6 penetrates the upper surface of the U-shaped plate 2, the driving gear 7 is fixedly sleeved on the output end of the second motor 6, the upper surface of the U-shaped plate 2 is provided with a circular hole, the two sleeves 9 are respectively rotatably connected to the inside of the corresponding circular hole, the inside of the two sleeves 9 is provided with an internal threaded hole, the two lead screws 10 are respectively threadedly arranged in the inside of the corresponding internal threaded hole, the lower ends of the two lead screws 10 are symmetrically fixedly connected to the upper surface of the moving plate 3, and the two driven gears 8 are respectively fixedly sleeved on the outer surfaces of the sleeves 9 and engaged with the driving gear 7.

[0027] The second motor 6 is started to rotate the driving gear 7, then the driven gears 8 can be rotated, then the two sleeves 9 can be rotated, and then the two lead screws 10 can be moved downward to drive the moving plate 3 to move downward.

[0028] In order to drill the coal seam, as shown in Figures 1-3 The drilling mechanism comprises two connecting rods 11, two clamping blocks 12, two first bolts 13 and a drill bit 14, the two clamping blocks 12 are respectively fixedly connected to the upper ends of the corresponding connecting rods 11, the two clamping blocks 12 are respectively sleeved on the output end of the second motor 6 and the rod wall of the connecting rod 11, the two first bolts 13 are respectively arranged on one side of the corresponding clamping block 12, and the drill bit 14 is fixedly connected to the lower end of the corresponding connecting rod 11.

[0029] The first motor 4 is started to rotate the connecting rod 11, then the drill bit 14 can be rotated, and when the protection tube 5 is replaced, one connecting rod 11 can be added at the same time, so that the drill bit 14 can work in the deep coal seam.

[0030] In order to fix the annular clamping block 15, as shown in Figures 1-2 The fixing mechanism comprises an annular clamping plate 15 and two second bolts 16, the annular clamping plate 15 is fixedly connected to the lower surface of the moving plate 3, the protection tube 5 is sleeved on the outer surface of the moving plate 3, the second bolts 16 are arranged on both sides of the protection tube 5, and the protection tube 5 is fixedly connected to the outer surface of the annular clamping plate 15 through the two second bolts 16.

[0031] The two bolts 16 can be used to fix the annular clamping plate 15.

[0032] In order to prevent the two screw rods 10 from sliding out from the inside of the sleeve 9, as shown in Figures 1-2 the upper end of each of the two screw rods 10 is fixedly connected with a limiting block 17.

[0033] The limiting block 17 can limit the two screw rods 10 from sliding out from the inside of the sleeve 9.

[0034] In order to facilitate the movement of the device, as shown in Figures 1-2 the lower surface of each of the two bases 1 is fixedly connected with two universal wheels 18.

[0035] Each of the universal wheels 18 is provided with a self-locking structure, which can stabilize the device during the movement.

[0036] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for those skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. A gas extraction drilling hole protection device for soft coal seam, comprising two bases (1), characterized in that, The upper surfaces of the two bases (1) are fixedly connected with a U-shaped plate (2), a moving plate (3) is arranged below the U-shaped plate (2), an adjusting mechanism is arranged between the moving plate (3) and the U-shaped plate (2), the moving plate (3) moves through the adjusting mechanism, the upper surface of the moving plate (3) is fixedly connected with a first motor (4), the output end of the first motor (4) penetrates the upper surface of the moving plate (3) and is provided with a drilling mechanism, the outer surface of the drilling mechanism is provided with a protection tube (5), a fixing mechanism is arranged between the protection tube (5) and the moving plate (3), and the protection tube (5) is fixed through the fixing mechanism.

2. The soft coal seam gas extraction borehole protection device according to claim 1, characterized in that, The adjusting mechanism comprises a second motor (6), a driving gear (7), two driven gears (8), two sleeve pipes (9) and two lead screws (10), the second motor (6) is fixedly connected to the upper surface of the U-shaped plate (2), the output end of the second motor (6) penetrates the upper surface of the U-shaped plate (2), the driving gear (7) is fixedly sleeved on the output end of the second motor (6), a circular hole is formed in the upper surface of the U-shaped plate (2), two sleeve pipes (9) are rotatably connected to the interiors of the corresponding circular holes, the interiors of the two sleeve pipes (9) are both provided with internal thread holes, the two lead screws (10) are threadedly arranged in the interiors of the corresponding internal thread holes, the lower ends of the two lead screws (10) are fixedly connected to the upper surface of the moving plate (3), and the two driven gears (8) are fixedly sleeved on the outer surfaces of the sleeve pipes (9) and are in mesh with the driving gear (7).

3. The soft coal seam gas extraction drilling hole protection device according to claim 1, characterized in that, The drilling mechanism comprises two connecting rods (11), two clamping blocks (12), two first bolts (13) and a drill bit (14), the two clamping blocks (12) are fixedly connected to the upper ends of the corresponding connecting rods (11), the two clamping blocks (12) are sleeved on the rod walls of the output end of the second motor (6) and the connecting rod (11), the two first bolts (13) are arranged on the sides of the corresponding clamping blocks (12), and the drill bit (14) is fixedly connected to the lower end of the corresponding connecting rod (11).

4. The soft coal seam gas extraction borehole protection device according to claim 1, characterized in that, The fixing mechanism comprises an annular clamping plate (15) and two second bolts (16), the annular clamping plate (15) is fixedly connected to the lower surface of the moving plate (3), the protection tube (5) is sleeved on the outer surface of the moving plate (3), the second bolts (16) are arranged on the two sides of the protection tube (5), and the protection tube (5) is fixedly connected to the outer surface of the annular clamping plate (15) through the two second bolts (16).

5. The soft coal seam gas extraction drilling hole protection device according to claim 2, characterized in that, The upper ends of the two lead screws (10) are fixedly connected with limit blocks (17).

6. The soft coal seam gas extraction drilling hole protection device according to claim 1, characterized in that, The lower surfaces of the two bases (1) are fixedly connected with two universal wheels (18).

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