Soft coal seam gas extraction drill hole end reinforcing device

Abstract

The soft coal seam gas extraction drill hole end reinforcing device comprises a sliding hinge block and a fixed hinge block which are arranged on an extraction pipe in a sleeving mode, the sliding hinge block and the fixed hinge block are oppositely arranged left and right, and a plurality of supporting mechanisms are evenly arranged between the sliding hinge block and the fixed hinge block along the circumference of the extraction pipe; the multiple supporting mechanisms are sleeved with steel wire mesh cloth. The supporting mechanism comprises a left inclined rod, a supporting rod and a right inclined rod, the left lower end of the left inclined rod is hinged to the sliding hinge block, the right upper end of the left inclined rod is hinged to the left end of the supporting rod, the right end of the supporting rod is hinged to the left upper end of the right inclined rod, and the right lower end of the right inclined rod is hinged to the fixed hinge block; an adjusting nut is arranged at the left end of the sliding hinge block, and a first retaining nut is arranged at the right end of the fixed hinge block. The drilling device is simple in structure and convenient to operate, the steel wire gauze is supported by the supporting mechanism to support the inner wall of the drill hole, the drill hole is prevented from collapsing, and the technical problem that hole collapse is prone to occurring in the existing drilling success process is solved.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine gas drainage borehole sealing technology, specifically relating to a device for reinforcing the end of a gas drainage borehole in soft coal seams. Background Technology

[0002] Gas drainage is an effective measure to prevent gas disasters, and borehole collapse in soft coal seams is a significant problem restricting efficient gas drainage. my country has a large number of soft coal seam mines, which are widely distributed. Due to their inherent characteristics, soft coal seams are prone to instability, deformation, and even borehole collapse in the borehole opening area under complex environmental disturbances such as gas fields, stress fields, and mining disturbances.

[0003] Currently, most research on the instability of borehole sealing sections in soft coal seams is in the qualitative research stage, with limited analysis of the causes of borehole collapse at the borehole opening. In particular, current reinforcement and sealing technologies have not solved the problem of borehole collapse during the drilling process, resulting in the current situation where boreholes in soft coal seams are deformed and fail to seal before sealing. Ultimately, the sealing effect of gas drainage boreholes in soft coal seams is still unsatisfactory, which poses safety hazards to mine production and causes a waste of time and money. Therefore, there is a need for a simple structural reinforcement device for the end of gas drainage boreholes in soft coal seams that can prevent borehole collapse. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a simple structure for reinforcing the end of a gas drainage borehole in a soft coal seam, which can prevent the borehole from collapsing during extraction.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a reinforcement device for the end of a gas extraction borehole in a soft coal seam, comprising a sliding hinge block and a fixed hinge block sleeved on the extraction pipe, the sliding hinge block and the fixed hinge block being arranged opposite each other on the left and right, and a plurality of support mechanisms being evenly arranged between the sliding hinge block and the fixed hinge block along the circumference of the extraction pipe.

[0006] The support mechanism includes a left inclined rod, a support rod, and a right inclined rod. The lower left end of the left inclined rod is hinged to a sliding hinge block. The upper right end of the left inclined rod is hinged to the left end of the support rod. The right end of the support rod is hinged to the upper left end of the right inclined rod. The lower right end of the right inclined rod is hinged to a fixed hinge block. All support rods are covered with a cylindrical wire mesh.

[0007] An adjusting nut is provided at the left end of the sliding hinge block, and a first support nut is provided at the right end of the fixed hinge block.

[0008] The left and right diagonal braces are the same length and both are greater than the radius of the drill hole.

[0009] A second support nut is provided at the left end of the fixed hinge block.

[0010] The number of support mechanisms is at least 6.

[0011] The sliding hinge block comprises a horizontally arranged first cylinder, a first through hole is arranged horizontally in the center of the first cylinder, a plurality of first mounting grooves corresponding to the left inclined rod are arranged on the circumference of the first cylinder, and a first hinge rod is arranged in the first mounting groove;

[0012] The fixed hinge block comprises a horizontally arranged second cylinder, a second through hole is arranged horizontally in the center of the second cylinder, a plurality of second mounting grooves corresponding to the right upper inclined rod are arranged on the circumference of the second cylinder, and a second hinge rod is arranged in the second mounting groove.

[0013] The support rod comprises a support rod body, a first hinge groove is arranged at the left end of the support rod body, a second hinge groove is arranged at the right end of the support rod, a third hinge rod is arranged in the first hinge groove, and a fourth hinge rod is arranged in the second hinge groove.

[0014] The left inclined rod comprises a first intermediate rod body, a left lower hinge part and a right upper hinge part, the left lower hinge part is arranged at the left lower part of the first intermediate rod body, the right upper hinge part is arranged at the right upper part of the first intermediate rod body, the left lower hinge part is provided with a first hinge hole, the right upper hinge part is provided with a second hinge hole, the first hinge rod is inserted into the first hinge hole, and the third hinge rod is inserted into the second hinge hole;

[0015] The right inclined rod comprises a second intermediate rod body, a left upper hinge part and a right lower hinge part, the left upper hinge part is arranged at the left upper part of the second intermediate rod body, the right lower hinge part is arranged at the right lower part of the second intermediate rod body, the left upper hinge part is provided with a third hinge hole, the right lower hinge part is provided with a fourth hinge hole, the second hinge rod is inserted into the fourth hinge hole, and the fourth hinge rod is inserted into the third hinge hole.

[0016] The length of the left inclined rod and the right inclined rod of the present application is the same and greater than the radius length of the drill hole, thereby ensuring that the left inclined rod is always in an inclined state of left low and right high, ensuring that the right inclined rod is always in an inclined state of left high and right low, improving the support effect of the support mechanism on the steel wire mesh cloth and thereby improving the support effect of the present application on the drill hole.

[0017] In specific use, the sliding hinge block is installed at the drill hole port part of the extraction pipe, the fixed hinge block is installed at the bag end of the extraction pipe, the position of the sliding hinge block can be adjusted through the adjusting nut, the sliding hinge block moves along the extraction pipe, the support rod is continuously lifted during the right movement of the sliding hinge block along the extraction pipe, until the support rod supports the steel wire mesh cloth and props on the inner wall of the drill hole, effectively preventing the drill hole from collapsing.

[0018] In summary, the utility model discloses simple structure, convenient operation can effectively prevent the drilling hole collapse through the support mechanism support steel wire mesh cloth top support inner wall drilling, solved the technical problem of the easy to appear collapse in the existing drilling hole forming process. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural diagram of the utility model installation in the drilling hole, and the left end of the support rod is connected with the sliding hinge block.

[0020] Figure 2 It is the front view of the utility model except steel wire mesh cloth

[0021] Figure 3 It is the side view of the utility model.

[0022] Figure 4 It is the structural diagram of the sliding hinge block of the utility model.

[0023] Figure 5 It is the structural diagram of the left inclined rod of the utility model.

[0024] Figure 6 It is the structural diagram of the support rod of the utility model. DETAILED DESCRIPTION

[0025] As shown in Figures 1-6 The utility model discloses a soft coal seam gas extraction drilling hole end reinforcing device, including the sliding hinge block 2 and fixed hinge block 3 of setting on the extraction pipe 1, the sliding hinge block 2 and fixed hinge block 3 are set up to left and right, and several support mechanisms 4 are evenly arranged along the circumference of extraction pipe 1 between the sliding hinge block 2 and fixed hinge block 3,

[0026] The support mechanism 4 includes left inclined rod 6, support rod 7 and right inclined rod 8, and the lower left end of left inclined rod 6 is hinged on the sliding hinge block 2, and the right upper end of left inclined rod 6 is hinged left end of support rod 7, and the right end of support rod 7 is hinged left upper end of right inclined rod 8, and the right lower end of right inclined rod 8 is hinged fixed hinge block 3, and all support rod 7 is externally sleeved with steel wire mesh cloth 5, and support rod 7 is parallel with extraction pipe 1.

[0027] The left end of the sliding hinge block 2 is provided with an adjusting nut 9, and the right end of the fixed hinge block 3 is provided with a first stop nut 11. The left end of the fixed hinge block 3 is provided with a second stop nut 12. The first stop nut 11 and the second stop nut 12 support the fixed hinge block 3, ensuring the fixation of the fixed hinge block 3. However, due to the threaded connection between the fixed hinge block 3 and the extraction pipe 1, the first stop nut 11 and the second stop nut 12 can completely realize the movement of the fixed hinge block 3. Those skilled in the art can move the fixed hinge block 3 as needed. The outer surface of the extraction pipe 1 of the present application can be machined with external threads, and the sliding hinge block 2 and the fixed hinge block 3 are sleeved on the outside of the extraction pipe 1. The adjusting nut 9, the first stop nut 11 and the second stop nut 12 are screwed on the extraction pipe 1.

[0028] The left inclined rod 6 and the right inclined rod 8 have the same length and are greater than the radius length of the drill hole 13. Such arrangement can ensure the horizontality of the support rod 7, and when the support rod 7 supports the steel wire mesh 5 to prop the inner wall of the drill hole 13, the left inclined rod 6 still maintains the inclined state of being low on the left and high on the right, and the right inclined rod 8 still maintains the inclined state of being high on the left and low on the right.

[0029] The number of support mechanisms 4 is at least 6, and the six support rods 7 of the at least six support mechanisms 4 supporting the circumferential inner wall of the drill hole 13 can effectively prevent the collapse of the drill hole 13. Of course, more can be provided, such as 8 or even 12, but considering factors such as cost, 6 is the most preferred, and those skilled in the art can set it as needed.

[0030] The sliding hinge block 2 includes a horizontally arranged first cylinder 15, the center of the first cylinder 15 is horizontally provided with a first through hole 16, and the circumference of the first cylinder 15 is provided with a plurality of first installation grooves 17 corresponding to the left inclined rod 6, and the first installation grooves 17 are provided with first hinge rods 18;

[0031] The fixed hinge block 3 includes a horizontally arranged second cylinder, the center of the second cylinder is horizontally provided with a second through hole, and the circumference of the second cylinder is provided with a plurality of second installation grooves corresponding to the right inclined rod 8, and the second installation grooves are provided with second hinge rods. The bottom wall of the first installation groove 17 is provided with a first stop block 19 corresponding to the left inclined rod 6, and the bottom wall of the second installation groove is provided with a second stop block corresponding to the right inclined rod 8. Due to the supporting action of the first stop block 19 and the second stop block, the left inclined rod 6 and the right inclined rod 8 cannot be in a horizontal state, that is, the lowest height of the support rod 7 cannot be on the same straight line as the left inclined rod 6 or the right inclined rod 8.

[0032] The support rod 7 includes a support rod body 20, the left end of the support rod body 20 is provided with a first hinge groove 21, the right end of the support rod is provided with a second hinge groove 22, the first hinge groove 21 is provided with a third hinge rod 23, and the second hinge groove 22 is provided with a fourth hinge rod 24.

[0033] The left inclined rod 6 comprises a first intermediate rod body 25, a left lower hinged part 26 and a right upper hinged part 27, the left lower hinged part 26 is arranged at the left lower part of the first intermediate rod body 25, the right upper hinged part 27 is arranged at the right upper part of the first intermediate rod body 25, the left lower hinged part 26 is provided with a first hinged hole 28, the right upper hinged part 27 is provided with a second hinged hole 29, the first hinged rod 18 is inserted into the first hinged hole 28, and the third hinged rod 23 is inserted into the second hinged hole 29;

[0034] The right inclined rod 8 comprises a second intermediate rod body, a left upper hinged part and a right lower hinged part, the left upper hinged part is arranged at the left upper part of the second intermediate rod body, the right lower hinged part is arranged at the right lower part of the second intermediate rod body, the left upper hinged part is provided with a third hinged hole, the right lower hinged part is provided with a fourth hinged hole, the second hinged rod is inserted into the fourth hinged hole, and the fourth hinged rod 24 is inserted into the third hinged hole.

[0035] The left inclined rod 6 and the right inclined rod 8 of the present application have the same length and are greater than the radius length of the drill hole 13, thereby ensuring that the left inclined rod 6 is always in an inclined state of being low on the left and high on the right, ensuring that the right inclined rod 8 is always in an inclined state of being high on the left and low on the right, improving the supporting effect of the supporting mechanism 4 on the steel wire mesh cloth 5 and thereby improving the supporting effect of the present application on the drill hole 13. In specific use, the sliding hinged block 2 is installed at the drill hole 13 port of the extraction pipe 1, the fixed hinged block 3 is installed at the bag 14 end of the extraction pipe 1, the position of the sliding hinged block 2 can be adjusted through the adjusting nut 9, the sliding hinged block 2 moves along the extraction pipe 1, the supporting rod 7 is constantly lifted in the process of the sliding hinged block 2 moving to the right along the extraction pipe 1, until the supporting rod 7 supports the steel wire mesh cloth 5 and props against the inner wall of the drill hole 13, effectively preventing the drill hole 13 from collapsing. The present application has the advantages of simple structure and convenient operation, and can effectively prevent the drill hole 13 from collapsing by supporting the steel wire mesh cloth 5 and propping against the inner wall of the drill hole 13 through the supporting mechanism 4, solving the technical problem of easy hole collapse in the existing drill hole 13 forming process.

[0036] The present embodiment does not limit the shape, material, structure, etc. of the present application in any form, and any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments all belong to the protection scope of the technical scheme of the present application.

Claims

1. A soft coal seam gas extraction drill hole end reinforcing device, characterized in that: The support mechanism comprises a left inclined rod, a support rod and a right inclined rod, the lower left end of the left inclined rod is hingedly connected to the sliding hinge block, the upper right end of the left inclined rod is hingedly connected to the left end of the support rod, the right end of the support rod is hingedly connected to the upper left end of the right inclined rod, the lower right end of the right inclined rod is hingedly connected to the fixed hinge block, and the outer part of all the support rods is sleeved with a steel wire mesh cloth in a cylindrical shape. The left end of the sliding hinge block is provided with an adjusting nut, and the right end of the fixed hinge block is provided with a first blocking nut. The left inclined rod and the right inclined rod have the same length and are longer than the radius of the drill hole.

2. The gas extraction drilling end reinforcing device for soft coal seam according to claim 1, characterized in that: The left end of the fixed hinge block is provided with a second blocking nut.

3. The gas extraction drilling hole end reinforcing device for soft coal seam according to claim 2, characterized in that: The number of the support mechanisms is at least six.

4. The gas extraction drilling end reinforcement device for soft coal seam according to claim 3, characterized in that: The sliding hinge block comprises a horizontally arranged first cylinder, the center of the first cylinder is horizontally provided with a first through hole, and the circumference of the first cylinder is provided with a plurality of first installation grooves corresponding to the left inclined rod, and the first installation grooves are provided with first hinge rods.

5. The gas extraction drilling end reinforcement device for soft coal seam according to claim 4, characterized in that: The fixed hinge block comprises a horizontally arranged second cylinder, the center of the second cylinder is horizontally provided with a second through hole, and the circumference of the second cylinder is provided with a plurality of second installation grooves corresponding to the right inclined rod, and the second installation grooves are provided with second hinge rods. The support rod comprises a support rod body, the left end of the support rod body is provided with a first hinge groove, the right end of the support rod is provided with a second hinge groove, the first hinge groove is provided with a third hinge rod, and the second hinge groove is provided with a fourth hinge rod.

6. The gas extraction drilling end reinforcement device for soft coal seam according to claim 5, characterized in that: The left inclined rod comprises a first intermediate rod body, a left lower hinge part and a right upper hinge part, the left lower hinge part is arranged at the lower left part of the first intermediate rod body, the right upper hinge part is arranged at the upper right part of the first intermediate rod body, the left lower hinge part is provided with a first hinge hole, the right upper hinge part is provided with a second hinge hole, the first hinge rod is inserted into the first hinge hole, and the third hinge rod is inserted into the second hinge hole.

7. The device according to claim 6, characterized in that it comprises a plurality of said reinforcing elements (3) arranged in a ring around the drill hole (2). The right inclined rod comprises a second intermediate rod body, a left upper hinge part and a right lower hinge part, the left upper hinge part is arranged at the upper left part of the second intermediate rod body, the right lower hinge part is arranged at the lower right part of the second intermediate rod body, the left upper hinge part is provided with a third hinge hole, the right lower hinge part is provided with a fourth hinge hole, the second hinge rod is inserted into the fourth hinge hole, and the fourth hinge rod is inserted into the third hinge hole. ​

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