A sectional coal mine gas extraction hole reaming supporting device

Abstract

This application relates to a segmented coal mine gas drainage hole enlargement support device, which includes an enlargement rod body, a main shaft fixedly connected to the enlargement rod body, and multiple identical enlargement support mechanisms arranged sequentially on the main shaft. Each segment of the enlargement support mechanism includes two positioning rings slidably connected to the main shaft. Multiple connecting rods are hinged to each of the two positioning rings, and the connecting rods are evenly distributed along the circumference of the positioning rings. The connecting rods on the two positioning rings are arranged one-to-one, and the ends of the corresponding connecting rods away from the positioning rings are hinged to a common positioning rod. Each positioning rod is fixedly connected to an arc-shaped support steel plate. A drive component is provided inside the main shaft for driving the positioning rings to move towards each other to expand the support steel plate or driving the positioning rings to move away from each other to contract the support steel plate. Each segment of the enlargement support structure corresponds to a different drive component. This application has the effect of effectively enlarging and reinforcing holes in soft coal seams where collapses occur.

Description

Technical Field

[0001] This application relates to the field of gas drainage equipment, and in particular to a segmented coal mine gas drainage hole enlargement support device. Background Technology

[0002] Methane is a non-toxic, odorless, and colorless flammable and explosive gas. Its main component is methane, with small amounts of ethane, propane, and butane. It also contains hydrogen sulfide, carbon dioxide, nitrogen, water vapor, and trace amounts of inert gases such as helium and argon. The natural gas or coal mine gas commonly referred to in daily life is the natural gas that people are familiar with.

[0003] During coal mine gas drainage operations, the loose and fractured nature of soft coal seams easily leads to the collapse of drainage holes, blocking the drainage pipes and causing reduced drainage efficiency and difficulties in the drainage process. Therefore, to achieve more efficient gas drainage and ensure smooth drainage, it is necessary to reinforce the soft coal seam section at the front end of the drainage hole. When reinforcing coal sections, due to varying degrees of collapse, segmented reinforcement is more effective in supporting different levels of collapse to ensure smooth gas drainage and achieve efficient operation. Therefore, designing a hole-expanding support device capable of segmented reinforcement of soft coal seams is an urgent problem to be solved. Summary of the Invention

[0004] In order to effectively reinforce the location of soft coal seam collapse by enlarging the borehole, this application provides a segmented coal mine gas drainage borehole enlargement support device.

[0005] The technical solution of the segmented coal mine gas drainage hole enlargement support device provided in this application is as follows:

[0006] A segmented coal mine gas drainage hole enlargement support device includes an enlargement rod body, a main shaft fixedly connected to the enlargement rod body, and an enlargement inlet fixedly connected to the end of the main shaft away from the enlargement rod body. Multiple identical enlargement support mechanisms are sequentially arranged along the main shaft from one end of the enlargement rod body to the enlargement inlet. Each segment of the enlargement support mechanism includes two positioning rings slidably connected to the main shaft. Multiple connecting rods are hinged to each of the two positioning rings, and the connecting rods are evenly distributed along the circumference of the positioning rings. The connecting rods on the two positioning rings are arranged in a one-to-one correspondence. A common positioning rod is hinged to the end of each corresponding connecting rod away from the positioning ring. An arc-shaped support steel plate is fixedly connected to the outside of each positioning rod. A drive component is provided inside the main shaft for driving the positioning rings to move towards each other to expand the support steel plate or driving the positioning rings to move away from each other to contract the support steel plate. Each segment of the enlargement support structure corresponds to a different drive component.

[0007] By adopting the above technical solution, when a collapse occurs in the extraction hole of a soft coal seam, the corresponding hole-expanding support mechanism is located. The drive component of the hole-expanding support mechanism is controlled to drive the positioning ring to move in opposite directions, causing the connecting rod to drive the support steel plate to expand outward. This allows the steel plate to abut against and support the inner wall of the extraction hole, reinforcing and expanding the collapsed part. This can more effectively reinforce and expand the collapsed part, extract gas more efficiently, and ensure smooth extraction from the extraction pipe.

[0008] Optionally, a stainless steel reinforcing mesh is fixedly connected between adjacent supporting steel plates, and the stainless steel reinforcing mesh is made of soft steel plate.

[0009] By adopting the above technical solution, the connecting rod pushes the supporting steel plate outward, and the supporting steel plate and the stainless steel reinforcing mesh together form a closed cylinder that abuts against the inner wall of the extraction hole. This can reinforce the inner wall of the extraction hole and prevent debris from falling into the space between the supporting steel plates. This can more effectively reinforce and enlarge the collapsed part of the hole. Moreover, the stainless steel reinforcing mesh is made of soft steel plate, which allows it to be folded and stored, thereby reducing the space occupied by the stainless steel reinforcing mesh.

[0010] Optionally, the drive assembly includes connecting ropes fixedly connected to opposite sides of the two positioning rings, and two positioning seats fixedly connected to the middle part of the two positioning rings. The positioning seats have through holes for the connecting ropes to pass through, and the main shaft has a through hole between the two positioning seats. The through hole is used for the connecting ropes and switch pull ropes to pass through, and the switch pull ropes extend from the main shaft to the body of the expanding rod.

[0011] By adopting the above technical solution, pulling the switch rope outward causes the two positioning rings to move in opposite directions via the connecting rope. The connecting rod pushes the support steel plate outward, and the support steel plate and the stainless steel reinforcement mesh together form a closed cylinder that abuts against the inner wall of the extraction hole, which can reinforce the inner wall of the extraction hole. According to the support steel plate corresponding to the collapsed section, the corresponding switch rope can be pulled, which can more effectively reinforce and expand the collapsed section.

[0012] Optionally, the connecting rope is fitted with a return spring, one end of which abuts against the positioning ring and the other end against the positioning seat.

[0013] By adopting the above technical solution, when the tension on the switch pull rope disappears, the reset spring relaxes, causing the positioning ring to move in opposite directions, thereby automatically retracting the support steel plate.

[0014] Optionally, an isolation column is provided at the connection between two adjacent hole-expanding support mechanisms. The isolation column is fixedly connected to the main shaft, and slots are provided on both sides of the isolation column. The slots are used to limit the end of the support steel plate.

[0015] By adopting the above technical solution, when the support steel plate is retracted, the end of the support steel plate is engaged in the slot, which isolates the inside of the support steel plate from the extraction hole, preventing the accessories in the extraction hole from falling onto the connecting rod and the return spring, thereby ensuring the normal operation of the connecting rod and the return spring and extending their service life.

[0016] Optionally, the enlarging rod body is provided with a positioning mechanism for locking or unlocking the switch pull rope; the enlarging rod body is provided with a receiving cavity, the positioning mechanism includes a locking rod slidably connected to the enlarging rod body, the end of the locking rod extending to the receiving cavity is provided with a clearance hole for the switch pull rope to pass through, and a locking assembly is provided in the receiving cavity to push the locking rod to fix the switch pull rope.

[0017] By adopting the above technical solution, after pulling the switch rope outward to the appropriate position, the supporting steel plate and the stainless steel reinforcing mesh together form a closed cylinder that abuts against the inner wall of the extraction hole. Then, the locking rod and the switch rope are fixed by the locking assembly, which enables the supporting steel plate and the stainless steel reinforcing mesh to be stably supported on the inner wall of the extraction hole.

[0018] Optionally, the locking assembly includes a limiting plate fixedly connected to the receiving cavity, the limiting plate having a groove, the end of the locking rod extending to the inner wall of the groove of the limiting plate, and a locking spring fixedly connected to the inner wall of the groove of the limiting plate, one end of the locking spring being fixedly connected to the inner wall of the groove of the limiting plate, and the other end being fixedly connected to the end of the locking rod.

[0019] By adopting the above technical solution, the tension of the locking spring pushes the locking rod to slide outward, locking the switch pull rope. When the switch pull rope needs to be pulled outward, the locking rod is pushed inward to compress the locking spring, so that the clearance hole and the guide hole are in the same plane, and the switch pull rope can be pulled outward. After pulling to the appropriate position, the locking rod is released, and the tension of the locking spring automatically pushes the locking rod to lock the switch pull rope. At the same time, when the support steel plate needs to be automatically retracted, the locking rod is pushed inward to compress the locking spring, the return spring contracts, and the return spring causes the positioning ring to move in opposite directions, thereby automatically retracting the support steel plate.

[0020] Optionally, the reaming inlet is tapered.

[0021] By adopting the above technical solution, the conical shape facilitates the advancement of the expanding rod body into the extraction hole.

[0022] The present invention has the following beneficial effects:

[0023] 1. A series of identical expanding support mechanisms are sequentially arranged on the main shaft from one end of the expanding rod body to the expanding inlet. Each expanding support mechanism includes two positioning rings slidably connected to the main shaft. Multiple connecting rods are hinged to each positioning ring, and the connecting rods are evenly distributed along the circumference of the positioning ring. The connecting rods on the two positioning rings are arranged in a one-to-one correspondence. The ends of the corresponding connecting rods furthest from the positioning ring are hinged to a common positioning rod. Each positioning rod is externally fixedly connected to an arc-shaped support steel plate. Stainless steel reinforcing mesh, made of soft steel plate, is fixedly connected between adjacent support steel plates. The main shaft contains mechanisms to drive the positioning rings to move in opposite directions, thereby expanding the support steel plates. Alternatively, a drive assembly can be used to drive the positioning rings to move in opposite directions to achieve the contraction of the supporting steel plate. Each section of the borehole expansion support structure corresponds to a different drive assembly. When a collapse occurs in the extraction hole of a soft coal seam, the borehole expansion support mechanism corresponding to the collapse hole in the soft coal seam is found. The drive assembly of the borehole expansion support mechanism of that section is controlled to drive the positioning rings to move in opposite directions, so that the connecting rod drives the supporting steel plate to expand outward. The supporting steel plate and the stainless steel reinforcement mesh together form a closed cylinder that abuts against the inner wall of the extraction hole, thereby allowing the steel plate to abut against and support the inner wall of the extraction hole, reinforcing and expanding the collapsed part. This can more effectively reinforce and expand the collapsed part, extract gas more efficiently, and ensure smooth extraction of the extraction pipe.

[0024] 2. A positioning mechanism for locking or unlocking the switch pull cord is provided on the main body of the expanding rod; a receiving cavity is formed inside the main body of the expanding rod; the positioning mechanism includes a locking rod slidably connected to the main body of the expanding rod, and a clearance hole for the switch pull cord to pass through the end of the locking rod extending into the receiving cavity; a limiting plate is fixedly connected inside the receiving cavity; a groove is formed inside the limiting plate; the end of the locking rod extends to the inner wall of the groove of the limiting plate; a locking spring is fixedly connected to the inner wall of the groove of the limiting plate; one end of the locking spring is fixedly connected to the inner wall of the groove of the limiting plate, and the other end is fixedly connected to the locking rod. At the end, the tension of the locking spring pushes the locking rod to slide outward, locking the switch pull rope. When the switch pull rope needs to be pulled outward, push the locking rod inward to compress the locking spring, so that the clearance hole and the guide hole are in the same plane, and then pull the switch pull rope outward. After pulling to the appropriate position, release the locking rod, and the tension of the locking spring will automatically push the locking rod to lock the switch pull rope. At the same time, when the support steel plate needs to be automatically retracted, push the locking rod inward to compress the locking spring, the return spring contracts, and the return spring causes the positioning ring to move in opposite directions, thereby automatically retracting the support steel plate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0026] Figure 2 This is a cross-sectional view of an embodiment of this application.

[0027] Figure 3 This is an exploded view created to highlight the borehole expansion support mechanism.

[0028] Figure 4 yes Figure 3 Enlarged view of part A.

[0029] Figure 5 This is a sectional view made to highlight the borehole expansion support mechanism.

[0030] Figure 6 yes Figure 2 Enlarged view of part B.

[0031] Explanation of reference numerals in the attached drawings: 1. Main body of the reaming rod; 11. Main shaft; 111. Positioning seat; 112. Through hole; 113. Through hole; 12. Reaming inlet; 13. Extraction pipe; 14. Isolation column; 141. Slot; 15. Guide hole; 16. Slide groove; 17. Receiving cavity; 2. Reaming support mechanism; 21. Positioning ring; 22. Connecting rod; 23. Positioning rod; 24. Supporting steel plate; 25. Stainless steel reinforcing mesh; 26. Connecting rope; 27. Switch pull rope; 28. Return spring; 3. Positioning mechanism; 31. Locking rod; 32. Clearance hole; 33. Limiting plate; 331. Groove; 34. Locking spring. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0033] This application discloses a segmented coal mine gas drainage hole enlargement support device. (Refer to...) Figure 1 and Figure 2 A segmented coal mine gas extraction hole enlargement support device includes an enlargement rod body 1, a main shaft 11 fixedly connected to the enlargement rod body 1, and an enlargement inlet 12 fixedly connected to the end of the main shaft 11 away from the enlargement rod body 1. The enlargement inlet 12 is tapered to facilitate the advancement of the enlargement rod body 1 into the extraction hole. The main shaft 11 is hollow inside, and an extraction pipe 13 is fixedly connected to the enlargement rod body 1, extending into the main shaft 11. The main shaft 11 has vent holes for gas entry. The main shaft 11 has multiple enlargement support mechanisms 2 from one end of the enlargement rod body 1 to the enlargement inlet 12. The figure shows three sections, but it is not limited to three sections.

[0034] Reference Figure 2 and Figure 3Each hole-expanding support mechanism 2 has the same structure. Here, we only take one hole-expanding support mechanism 2 as an example. Isolation columns 14 are set at the positions of two adjacent hole-expanding support mechanisms 2. The isolation columns 14 are fixedly connected to the main shaft 11. The hole-expanding support mechanism 2 includes two positioning rings 21 that are slidably connected to the main shaft 11. Multiple connecting rods 22 are hinged on each of the two positioning rings 21. The connecting rods 22 are evenly distributed along the circumference of the positioning rings 21. The connecting rods 22 on the two positioning rings 21 are set one-to-one. The ends of the corresponding connecting rods 22 away from the positioning rings 21 are hinged to a positioning rod 23. Each positioning rod 23 is fixedly connected to a support steel plate 24. The support steel plate 24 is a mesh plate and is arc-shaped. The isolation columns 14 have slots 141 on both sides. The slots 141 are used to limit the ends of the support steel plates 24. When the support steel plates 24 are retracted, the ends of the support steel plates 24 are locked in the slots 141. Stainless steel reinforcing mesh 25 is fixedly connected to adjacent supporting steel plates 24. The stainless steel reinforcing mesh 25 is made of soft material, which allows it to be folded and stored, thereby reducing the space occupied by the stainless steel reinforcing mesh 25.

[0035] Reference Figure 4 and Figure 5 Two positioning rings 21 are fixedly connected to each other on opposite sides with connecting ropes 26. The main shaft 11 is located in the middle of the two positioning rings 21 and is fixedly connected to two positioning seats 111. The positioning seats 111 have through holes 112 for the connecting ropes 26 to pass through. The connecting ropes 26 are fitted with return springs 28. One end of the return spring 28 abuts against the positioning rings 21 and the other end abuts against the positioning seats 111. After the connecting ropes 26 pass through the through holes 112, they are fixedly connected to switch pull ropes 27. The main shaft 11 is located between the two positioning seats 111 and has a through hole 113 for the connecting ropes 26 and switch pull ropes 27 to pass through. The switch pull ropes 27 extend from the main shaft 11 to form a hole-expanding rod body 1. Each hole-expanding support mechanism 2 corresponds to a switch pull rope 27, and each switch pull rope 27 extends to form a hole-expanding rod body 1.

[0036] When the connecting rope 26 is pulled outward, it causes the two positioning rings 21 to move in opposite directions. The connecting rod 22 pushes the support steel plate 24 outward. The support steel plate 24 and the stainless steel reinforcing mesh 25 together form a closed cylinder that abuts against the inner wall of the extraction hole, which can reinforce the inner wall of the extraction hole. According to the support steel plate 24 corresponding to the collapsed section, the corresponding switch rope 27 can be pulled to more effectively reinforce and enlarge the collapsed section. When the positioning rings 21 move in opposite directions, the connecting rope 26 stretches the return spring 28. When the tension on the switch rope 27 disappears, the return spring 28 relaxes, causing the positioning rings 21 to move in opposite directions, thereby causing the support steel plate 24 to automatically retract.

[0037] Reference Figure 2 and Figure 6 The main body 1 of the expanding rod is provided with a positioning mechanism 3 for fixing the switch pull rope 27. Each switch pull rope 27 corresponds to a positioning mechanism 3. The structure of each positioning mechanism 3 is the same. Here, only one positioning mechanism 3 is used as an example. The main body 1 of the expanding rod has a guide hole 15 for the switch pull rope 27 to pass through. The positioning mechanism 3 includes a groove 16 on the main body 1 of the expanding rod. A receiving cavity 17 is formed in the middle of the main body 1 of the expanding rod. The groove 16 and the receiving cavity 17 are connected. A locking rod 31 is slidably connected in the groove 16. The end of the locking rod 31 extending to the receiving cavity 17 has a clearance hole 32 for the switch pull rope 27 to pass through. A limiting plate 33 is fixedly connected in the receiving cavity 17. A groove 331 is formed in the limiting plate 33. The end of the locking rod 31 extends to the inner wall of the groove 331 of the limiting plate 33. A locking spring 34 is fixedly connected to the inner wall of the groove 331 of the limiting plate 33. One end of the locking spring 34 is fixedly connected to the inner wall of the groove 331 of the limiting plate 33. One end is fixedly connected to the end of the locking rod 31; the tension of the locking spring 34 pushes the locking rod 31 to slide outward, locking the switch pull rope 27. When it is necessary to pull the switch pull rope 27 outward, push the locking rod 31 inward to squeeze the locking spring 34, so that the clearance hole 32 and the guide hole 15 are in the same plane, and then pull the switch pull rope 27 outward. After pulling to the appropriate position, release the locking rod 31, and the tension of the locking spring 34 will automatically push the locking rod 31 to lock the switch pull rope 27. At the same time, when it is necessary to automatically retract the support steel plate 24, push the locking rod 31 inward to squeeze the locking spring 34, the return spring 28 will contract, and the return spring 28 will cause the positioning ring 21 to move in opposite directions, thereby automatically retracting the support steel plate 24.

[0038] The implementation principle of a segmented coal mine gas extraction hole enlargement support device according to an embodiment of this application is as follows: When reinforcing a coal section, the hole can be enlarged and reinforced according to the collapsed portion within the extraction hole. The corresponding switch rope 27 of the enlargement support mechanism 2 for the corresponding section is located. The locking rod 31 is pushed inward to compress the locking spring 34, bringing the clearance hole 32 and guide hole 15 into the same plane. The switch rope 27 can then be pulled outward. After pulling to the appropriate position, the locking rod 31 is released, and the tension of the locking spring 34 automatically pushes the locking rod 31 to lock the switch rope 27. Simultaneously, when the support steel plate 24 needs to be automatically retracted, the locking rod 31 is pushed inward to compress the locking spring 34, eliminating the pressure on the switch rope 27. The return spring 28 contracts, causing the positioning ring 21 to move in opposite directions, thereby automatically retracting the support steel plate 24 towards the main shaft 11. This allows for segmented hole enlargement and reinforcement based on the collapsed portion.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sectional coal mine gas extraction hole reaming supporting device, comprising a reaming rod main body (1), a main shaft (11) is fixedly connected on the reaming rod main body (1), and a reaming head (12) is fixedly connected at the end of the main shaft (11) away from the reaming rod main body (1), characterized in that: The main shaft (11) is provided with multiple sections of identical reaming support mechanisms (2) from one end of the reaming rod body (1) to the reaming inlet (12); each section of the reaming support mechanism (2) includes two positioning rings (21) slidably connected to the main shaft (11), and multiple connecting rods (22) are hinged on the two positioning rings (21). The connecting rods (22) are evenly distributed along the circumference of the positioning rings (21), and the connecting rods (22) on the two positioning rings (21) are arranged one-to-one. The corresponding connecting rods (22) are hinged together at the ends away from the positioning ring (21) with a positioning rod (23). Each positioning rod (23) is fixedly connected to an arc-shaped support steel plate (24). The main shaft (11) is equipped with a drive assembly for driving the positioning rings (21) to move in opposite directions to expand the support steel plate (24) or driving the positioning rings (21) to move away from each other to contract the support steel plate (24). Each section of the hole expansion support structure corresponds to a different drive assembly. Stainless steel reinforcing mesh (25) is fixedly connected between adjacent supporting steel plates (24), and the stainless steel reinforcing mesh (25) is made of soft steel plate; The drive assembly includes connecting ropes (26) fixedly connected to the opposite sides of the two positioning rings (21), and the main shaft (11) is located in the middle of the two positioning rings (21) and two positioning seats (111) are fixedly connected to each other. The positioning seats (111) have through holes (112) for the connecting ropes (26) to pass through. The main shaft (11) has a through hole (113) between the two positioning seats (111). The through hole (113) is used for the connecting ropes (26) and the switch pull rope (27) to pass through. The switch pull rope (27) extends from the main shaft (11) out of the enlarged rod body (1). The connecting rope (26) is fitted with a return spring (28), one end of which abuts against the positioning ring (21) and the other end abuts against the positioning seat (111); The enlarging rod body (1) is provided with a positioning mechanism (3) for locking or unlocking the switch pull rope (27); the enlarging rod body (1) is provided with a receiving cavity (17); the positioning mechanism (3) includes a locking rod (31) slidably connected to the enlarging rod body (1); the end of the locking rod (31) extending to the receiving cavity (17) is provided with a clearance hole (32) for the switch pull rope (27) to pass through; the receiving cavity (17) is provided with a locking assembly for pushing the locking rod (31) to fix the switch pull rope (27); The locking assembly includes a limiting plate (33) fixedly connected to the receiving cavity (17). The limiting plate (33) has a groove (331) inside. The end of the locking rod (31) extends to the inner wall of the groove (331) of the limiting plate (33). A locking spring (34) is fixedly connected to the inner wall of the groove (331) of the limiting plate (33). One end of the locking spring (34) is fixedly connected to the inner wall of the groove (331) of the limiting plate (33), and the other end is fixedly connected to the end of the locking rod (31).

2. The segmented coal mine gas drainage hole enlargement support device according to claim 1, characterized in that: An isolation column (14) is provided at the connection of two adjacent hole-expanding support mechanisms (2). The isolation column (14) is fixedly connected to the main shaft (11). The isolation column (14) has slots (141) on both sides. The slots (141) are used to limit the end of the support steel plate (24).

3. The segmented coal mine gas drainage hole enlargement support device according to claim 1, characterized in that: The reaming head (12) is tapered.

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