Axial balance grooving pressure relief and permeability improvement device for gas extraction drilling

Abstract

The utility model belongs to the technical field of coal mine gas extraction, and particularly relates to an axial balance grooving pressure relief anti-reflection device for gas extraction drilling, which comprises a balance output shaft, the left end of the balance output shaft is provided with an axial balance grooving shaft through a connecting piece, and the right side wall of the inner side of the axial balance grooving shaft is fixedly connected with a fixing column. A rotating shaft is rotationally connected to the interior of the fixing column, a rotating seat is fixedly connected to the outer side of the rotating shaft in a sleeving mode, the rotating seat makes contact with the fixing column, and a cutting piece is fixedly connected to the upper end of the rotating seat. Through the stretching effect of the first spring, the cutting piece can make contact with the wall of a drill hole, under the rotation effect of the axial balance grooving shaft, grooving and pressure relief treatment on the wall of the drill hole is completed, under the effects of the motor, the winding wheel, the pull wire and other structures, the cutting piece can be pulled to deflect, and the cutting piece can be wound and unwound. And the cutting piece can be automatically controlled and used conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine gas extraction, in particular to an axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling holes. Background Art

[0002] As we all know, the axial balanced notch pressure relief and permeability enhancement device for gas extraction drilling is a safety device used in the gas extraction process of coal mines. Its main function is to achieve pressure relief and permeability enhancement during gas extraction by cutting the axial notch of the gas extraction drilling hole, thereby improving the safety of the mine and the extraction effect;

[0003] The working principle of the device is to set a slotting device on the upper part of the gas extraction borehole, and form a slot extending axially on the borehole wall by rotating and cutting. When high-pressure gas is generated during gas extraction, the gas will be quickly released through the slot, achieving the pressure relief effect. At the same time, the existence of the slot can also increase the gas permeability area around the borehole, thereby improving the gas permeability and enhancing the gas extraction effect.

[0004] An axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling is disclosed in the invention patent with invention authorization announcement number CN108868873B. The axial balanced grooving pressure relief and permeability enhancement device is suitable for axial grooving and permeability enhancement operations in high-gas and low-permeability coal seam extraction drilling. The axial balanced grooving device includes a balancing device mechanism and a support mechanism with a nozzle. It can achieve dynamic balance under the action of an eccentric balancing shaft and a support mechanism, and the nozzle and the support mechanism maintain the same horizontal direction.

[0005] However, the existing axial balanced grooving pressure relief and transmittance enhancement devices for gas extraction drilling also have certain shortcomings. The existing axial balanced grooving pressure relief and transmittance enhancement devices for gas extraction drilling mostly simply adopt the setting of telescopic springs to complete the support and cutting processing of the cutting parts. This is not convenient for the operating personnel to retract and release the cutting parts, and it is difficult to use the axial balanced grooving shaft for exploration and exiting the hole. Utility Model Content

[0006] The purpose of the utility model is to provide an axially balanced grooving pressure-relieving and transmittance-enhancing device for gas extraction drilling, which solves the problem that the existing axially balanced grooving pressure-relieving and transmittance-enhancing devices for gas extraction drilling mostly simply adopt the setting of telescopic springs to complete the support and cutting processing of the cutting piece, which is inconvenient for the operating personnel to retract and release the cutting piece, and thus it is difficult to use the axially balanced grooving shaft for exploring and exiting the hole.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling, comprising a balanced output shaft, the left end of the balanced output shaft is installed with an axial balanced grooving shaft through a connecting piece, the inner right side wall of the axial balanced grooving shaft is fixedly connected with a fixed column, the interior of the fixed column is rotatably connected with a rotating shaft, the outer side of the rotating shaft is fixedly sleeved with a rotating seat, the rotating seat is in contact with the fixed column, the upper end of the rotating seat is fixedly connected with a cutting piece, a spring 1 is welded to the right side of the cutting piece, and the other end of the spring 1 is welded to the fixed column;

[0008] A motor is fixedly installed on the inner left wall of the axial balancing groove shaft, a winding wheel is fixedly sleeved on the outer side of the output shaft of the motor, a driven member is fixedly sleeved on the outer side of the output shaft of the motor, the driven member is in contact with the winding wheel, an annular groove is provided on the surface of the driven member, a top block is slidably connected to the inside of the axial balancing groove shaft, an end face of the top block close to the driven member is fixedly connected to a limiting end, the limiting end is in contact with the annular groove, an end plate is fixedly connected to the left end of the top block, a spring 2 is welded on the end face of the end plate away from the limiting end, and the other end of the spring 2 is welded to the axial balancing groove shaft.

[0009] Preferably, the rotating seat is in an inverted U shape as a whole and is made of cast iron. Through the setting of the rotating seat, it can be used for the installation of subsequent cutting parts, and the cast iron material has good durability and structural strength.

[0010] Preferably, the cutting piece is overall arc-shaped and is made of high-speed steel. Through the setting of the cutting piece, the borehole wall can be grooved. The high-speed steel material has high hardness, wear resistance and high temperature resistance, and is suitable for cutting harder materials.

[0011] Preferably, the surface of the spring one is treated with anti-rust spraying. The spring one is made of titanium alloy. Through the anti-rust spraying treatment, the spring one has a good anti-rust effect, and the titanium alloy material has uniform and good high strength and tensile properties.

[0012] Preferably, two top blocks are provided, and the two top blocks are evenly distributed on the axial balance groove shaft. Through the provision of the top blocks, the limit end can be guided.

[0013] Preferably, the end of the limiting end is chamfered, and the limiting end is made of alumina ceramic material. Through the setting of the limiting end, the annular groove can be limited, and the alumina ceramic material has good wear resistance.

[0014] Preferably, the surface of the spring 2 is treated with anti-rust spraying. The spring 2 is made of steel alloy. Through the anti-rust spraying treatment, the spring 2 has a good anti-rust effect, and the steel alloy material has uniform and good high strength and tensile properties.

[0015] Preferably, a traction line is provided on the surface of the winding wheel, and the traction line is fixedly connected to the cutting piece. The cutting piece can be pulled by the setting of the traction line.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The utility model can make the cutting piece contact with the borehole wall through the stretching effect of the spring 1, and complete the grooving and pressure relief treatment of the borehole wall under the rotation effect of the axial balance grooving shaft. Under the action of the motor, winding wheel, traction line and other structures, the cutting piece can be pulled to deflect and the cutting piece can be retracted and released, which is convenient for automatic control and use of the cutting piece.

[0018] 2. The utility model can limit the rotation of the driven member through the coordinated use of structures such as an annular groove and a limit end, and then limit the rotation of the output shaft of the motor, so as to avoid the problem of unnecessary shaking of the motor output shaft due to centrifugal force, so as to ensure the normal winding operation of the traction line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0020] Figure 2 For the utility model Figure 1 A top-down perspective view of

[0021] Figure 3 For the utility model Figure 2 Magnified view of the cut piece;

[0022] Figure 4 For the utility model Figure 3 A magnified image of point A;

[0023] Figure 5 For the utility model Figure 3 Enlarged view of point B.

[0024] In the figure: 1. Balance output shaft; 2. Axial balance groove shaft; 3. Fixed column; 4. Rotating shaft; 5. Rotating seat; 6. Cutting piece; 7. Spring 1; 8. Motor; 9. Winding wheel; 10. Traction line; 11. Follower; 12. Annular groove; 13. Top block; 14. Limit end; 15. End plate; 16. Spring 2. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , an axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling, comprising a balanced output shaft 1, an axial balanced grooving shaft 2 is installed on the left end of the balanced output shaft 1 through a connecting piece, a fixed column 3 is fixedly connected to the inner right wall of the axial balanced grooving shaft 2, a rotating shaft 4 is rotatably connected inside the fixed column 3, a rotating seat 5 is fixedly sleeved on the outer side of the rotating shaft 4, the rotating seat 5 is in contact with the fixed column 3, a cutting piece 6 is fixedly connected to the upper end of the rotating seat 5, a spring 7 is welded to the right side of the cutting piece 6, and the other end of the spring 7 is welded to the fixed column 3;

[0027] A motor 8 is fixedly installed on the inner left wall of the axially balanced grooved shaft 2, and a winding wheel 9 is fixedly sleeved on the outer side of the output shaft of the motor 8. A traction line 10 is arranged on the surface of the winding wheel 9, and the traction line 10 is fixedly connected to the cutting piece 6. Through the setting of the traction line 10, the cutting piece 6 can be used for traction, and a follower 11 is fixedly sleeved on the outer side of the output shaft of the motor 8. The follower 11 contacts the winding wheel 9, and an annular groove 12 is provided on the surface of the follower 11. A top block 13 is slidably connected to the inside of the axially balanced grooved shaft 2, and the end face of the top block 13 close to the follower 11 is fixedly connected to the limiting end 14, and the limiting end 14 contacts the annular groove 12, and the left end of the top block 13 is fixedly connected to the end plate 15, and a spring 2 16 is welded to the end face of the end plate 15 away from the limiting end 14, and the other end of the spring 2 16 is welded to the axially balanced grooved shaft 2.

[0028] See also Figure 1 , Figure 2 , Figure 3 , Figure 4The rotating seat 5 is in an inverted U shape as a whole. The rotating seat 5 is made of cast iron. Through the setting of the rotating seat 5, it can be used for the subsequent installation and use of the cutting piece 6, and the cast iron material has good durability and structural strength. The cutting piece 6 is in an arc shape as a whole. The cutting piece 6 is made of high-speed steel. Through the setting of the cutting piece 6, the borehole wall can be grooved, and the high-speed steel material has high hardness, wear resistance and high temperature resistance, and is suitable for cutting harder materials. The surface of the spring 7 is treated with anti-rust spraying. The spring 7 is made of titanium alloy. Through the anti-rust spraying treatment, the spring 7 has a good anti-rust effect, and the titanium alloy material has uniform and good high strength and tensile properties.

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 There are two top blocks 13, which are evenly distributed on the axial balance groove shaft 2. Through the setting of the top block 13, the limit end 14 can be guided, and the end of the limit end 14 is chamfered. The limit end 14 is made of alumina ceramic. Through the setting of the limit end 14, the annular groove 12 can be limited, and the alumina ceramic material has good wear resistance. The surface of the spring 16 is treated with rust-proof spraying. The spring 16 is made of steel alloy. Through the treatment of rust-proof spraying, the spring 16 has a good rust-proof effect, and the steel alloy material has uniform high strength and tensile properties.

[0030] The specific implementation process of the utility model is as follows: when the axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling needs to be used, the motor 8 is started to drive the output shaft to rotate in the forward direction, so as to drive the winding wheel 9 to rotate, and the traction line 10 is wound up, thereby pulling the cutting piece 6 for traction, and the spring 17 is deformed, so that the cutting piece 6 is deflected, so as to drive the rotating seat 5 to rotate, and drive the rotating shaft 4 to rotate inside the fixed column 3, so as to ensure the stability of the deflection of the cutting piece 6, and finally make the cutting piece 6 sink into the axial balanced grooving shaft 2, so as to facilitate the operator to use the axial balanced grooving shaft 2 for hole exploration;

[0031] When the axial balance grooving shaft 2 reaches the specified position, the starting motor 8 drives the output shaft to rotate in the opposite direction, so as to drive the reel 9 to rotate in the opposite direction, pay out the traction line 10, and cooperate with the deformation of the spring 7 to pull the cutting element 6 to reset, so that the cutting element 6 contacts the inside of the borehole, and cooperate with the rotation of the axial balance grooving shaft 2 and other structures to make the cutting element 6 rotate and groove along the inner wall of the borehole, so that when high-pressure gas is generated during the extraction process, the gas will be quickly released through the notch, achieving the pressure relief effect. At the same time, the presence of the notch can also increase the gas permeability area around the borehole, thereby improving the gas permeability and enhancing the gas extraction effect;

[0032] When the motor 8 drives the output shaft to rotate, the output shaft can drive the driven member 11 to rotate, so that the limit end 14 slides along the inner wall of the annular groove 12, limits the driven member 11, and then limits the rotation of the output shaft of the motor 8, so as to avoid the problem of shaking of the output shaft of the motor 8 due to centrifugal force when it rotates. Under the deformation action of the spring 16, the end plate 15 can be pushed to drive the top block 13 to move in the direction close to the driven member 11, so that the limit end 14 is always in contact with the annular groove 12 to ensure the rotation limiting effect of the limit end 14 and the driven member 11.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An axial balanced groove pressure relief and permeability enhancement device for gas extraction drilling, comprising a balanced output shaft (1), characterized in that: The left end of the balancing output shaft (1) is installed with an axial balancing groove shaft (2) through a connecting piece, the inner right side wall of the axial balancing groove shaft (2) is fixedly connected with a fixing column (3), the interior of the fixing column (3) is rotatably connected with a rotating shaft (4), the outer side of the rotating shaft (4) is fixedly sleeved with a rotating seat (5), the rotating seat (5) is in contact with the fixing column (3), the upper end of the rotating seat (5) is fixedly connected with a cutting piece (6), the right side of the cutting piece (6) is welded with a spring one (7), and the other end of the spring one (7) is welded to the fixing column (3); A motor (8) is fixedly mounted on the inner left side wall of the axial balancing grooved shaft (2); a winding wheel (9) is fixedly sleeved on the outer side of the output shaft of the motor (8); a driven member (11) is fixedly sleeved on the outer side of the output shaft of the motor (8); the driven member (11) is in contact with the winding wheel (9); an annular groove (12) is provided on the surface of the driven member (11); a top block (13) is slidably connected inside the axial balancing grooved shaft (2); an end surface of the top block (13) close to the driven member (11) is fixedly connected to a limiting end (14); the limiting end (14) is in contact with the annular groove (12); an end plate (15) is fixedly connected to the left end of the top block (13); a spring 2 (16) is welded to the end surface of the end plate (15) away from the limiting end (14); the other end of the spring 2 (16) is welded to the axial balancing grooved shaft (2).

2. The axial balanced groove pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: The rotating seat (5) is in an inverted U shape as a whole and is made of cast iron.

3. The axial balanced groove pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: The cutting piece (6) is in an arc shape as a whole and is made of high-speed steel.

4. The axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: The surface of the spring 1 (7) is treated with rust-proof spraying, and the spring 1 (7) is made of titanium alloy.

5. The axial balanced groove pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: Two top blocks (13) are provided, and the two top blocks (13) are evenly distributed on the axially balanced grooved shaft (2).

6. The axial balanced grooving pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: The end of the limiting end (14) is chamfered, and the limiting end (14) is made of alumina ceramic material.

7. The axial balanced groove pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: The surface of the spring 2 (16) is treated with rust-proof spraying, and the spring 2 (16) is made of steel alloy.

8. The axial balanced groove pressure relief and permeability enhancement device for gas extraction drilling according to claim 1, characterized in that: A traction line (10) is provided on the surface of the winding wheel (9), and the traction line (10) is fixedly connected to the cutting piece (6).

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