Gas extraction borehole sealing mechanism and method
Patent Information
- Application Number
- CN202310810649.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-04
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2043-07-04
AI Technical Summary
[0003]然而，现有的瓦斯抽采钻孔封堵机构在使用时，大都将密封板通过螺栓固定连接在钻孔的顶部，但是，在抽采的过程中，往往由于震动等因素，导致密封板发生松动现象，从而影响其密封的效果
（1）、该种瓦斯抽采钻孔封堵机构及方法，通过设置第一连接机构等，当需要对钻孔本体进行密封封堵时，通过安装机构将两个封堵板进行拼接并套设在抽采管的侧壁，接着，转动第一摇轮，第一摇轮的转动带动转动杆的转动，进而带动第一螺纹杆和第二尖锥的转动，从而将第一螺纹杆旋入土壤中，与此同时，将插杆插入土壤中，使得封堵板与钻孔本体的顶部相抵，形成封堵密封效果，并且，在进行瓦斯抽采时，抽采管进行上下往复移动，当抽采管向上移动时，使得橡胶轮和第三转轴进行逆时针转动，并通过第二连接机构带动第二固定环进行同步转动，使得限位面与卡槽的侧壁相抵，从而推动第一固定环和第一转轴进行同步转动，第一转轴的转动带动主动锥齿轮的转动，进而带动橡胶轮和第一螺纹杆的转动，当抽采管向下移动时，使得橡胶轮和第三转轴进行顺时针转动，此时，斜面与卡槽的侧壁相抵，从而使得卡块从卡槽内滑出，同时，第一弹簧被压缩，此时，第一螺纹杆不会反转，从而能够利用抽采管工作时的往复移动，对封堵板进行挤压，保证封堵板与钻孔本体顶部的挤压力，避免松动，从而保证密封效果。
Smart Images
Figure CN116988758B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gas extraction technology, specifically to a gas extraction borehole sealing mechanism and method. Background Technology
[0002] Coal mine gas extraction involves drilling into the coal seam and gas accumulation area, connecting the borehole to a dedicated pipeline, and using extraction equipment to extract the gas from the coal seam and goaf to the surface for utilization or discharge into the main return airflow. During extraction, the extraction operation is achieved by moving the extraction pipe on the extraction equipment up and down. In addition, the borehole needs to be sealed to prevent gas leakage. Currently, coal mines require the use of sealing plates to seal the boreholes during gas extraction.
[0003] However, in the existing gas drainage borehole sealing mechanism, the sealing plate is usually fixed to the top of the borehole with bolts. However, during the drainage process, the sealing plate often becomes loose due to factors such as vibration, which affects its sealing effect. Summary of the Invention
[0004] The purpose of this invention is to provide a gas drainage borehole sealing mechanism and method to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a gas extraction borehole sealing mechanism, comprising an extraction pipe disposed within a borehole body, the extraction pipe reciprocating up and down within the borehole body, two symmetrically arranged sealing plates sleeved on the side wall of the extraction pipe, the two sealing plates being detachably connected by an installation mechanism, a semi-circular groove formed on the side wall of the sealing plate, a sealing gasket fixedly connected within the semi-circular groove, an insertion rod fixedly connected to the bottom of the sealing plate, a first pointed cone fixedly connected to the lower end of the insertion rod, a first threaded rod rotatably connected to the bottom of the sealing plate, a second pointed cone fixedly connected to the lower end of the first threaded rod, an L-shaped plate fixedly connected to the top of the sealing plate, a rotating rod rotatably connected to the bottom of the L-shaped plate, the lower end of the rotating rod being fixed to the upper end of the first threaded rod, and a first rocker wheel fixedly connected to the upper end of the rotating rod, the rotation of the rotating rod being driven by a driving mechanism; The driving mechanism includes a driven bevel gear fixedly sleeved on the side wall of the rotating rod, and a movable plate slidably connected to the top of the sealing plate through a reset mechanism. A first support plate is fixedly connected to the top of the movable plate, and a driving bevel gear is rotatably connected to the side wall of the first support plate through a first rotating shaft. A second support plate is fixedly connected to the top of the movable plate, and a second rotating shaft is rotatably connected to the side wall of the second support plate. A third support plate is fixedly connected to the top of the movable plate, and a rubber wheel is rotatably connected to the side wall of the third support plate through a third rotating shaft. A first connecting mechanism is provided between the second rotating shaft and the first rotating shaft, and a second connecting mechanism is provided between the third rotating shaft and the second rotating shaft.
[0006] Preferably, the first connecting mechanism includes a first fixing ring fixedly sleeved on the side wall of the first rotating shaft, and the end of the first fixing ring is provided with a plurality of arrayed slots. The side wall of the second rotating shaft is fixedly sleeved with a second fixing ring, and the end of the second fixing ring is connected to a block through a first telescopic mechanism. The block is inserted into the slot and includes an inclined surface and a limiting surface.
[0007] Preferably, the first telescopic mechanism includes a plurality of first T-shaped guide rods arranged in an array at the end of the second fixed ring, and one end of the first T-shaped guide rod is fixed to the side wall of the locking block, and a first spring is sleeved on the side wall of the first T-shaped guide rod.
[0008] Preferably, the second connecting mechanism includes a plurality of arrayed insertion holes at the end of the second rotating shaft, and the side wall of the third support plate is connected to a movable disk via a moving mechanism. The end of the movable disk is connected to a pin via a second telescopic mechanism, and the pin is inserted into the insertion hole.
[0009] Preferably, the second telescopic mechanism includes a plurality of second T-shaped guide rods arranged in an array at the end of the movable disk, and one end of the second T-shaped guide rod is fixedly connected to a connecting disk, one end of the pin is fixedly connected to the end of the connecting disk, and a second spring is sleeved on the side wall of the second T-shaped guide rod.
[0010] Preferably, the moving mechanism includes two symmetrically arranged first connecting blocks fixedly connected to the side wall of the third rotating shaft, and two symmetrically arranged second connecting blocks fixedly connected to the end of the moving disk. A first sleeve is fixedly connected to the side wall of the first connecting block, and a first sleeve rod is inserted into the first sleeve. The other end of the first sleeve rod is fixed to the side wall of the second connecting block, and a threaded pipe is fixedly connected to the side wall of the first connecting block. A second threaded rod is threadedly connected to the threaded pipe, and the other end of the second threaded rod is rotatably connected to the side wall of the second connecting block and fixedly connected to a second rocker wheel.
[0011] Preferably, the reset mechanism includes a fixing block fixedly connected to the top of the sealing plate, and a second sleeve fixedly connected to the side wall of the fixing block. A sliding disc is slidably connected inside the second sleeve via a third spring, and a second sleeve rod is fixedly connected to the end of the sliding disc. A pushing block is fixedly connected to the side wall of the moving plate, and the end of the second sleeve rod slides on the side wall of the pushing block. The moving plate is slidably connected to the top of the sealing plate via a sliding mechanism.
[0012] Preferably, the sliding mechanism includes an arc-shaped groove formed at the bottom of the movable plate, and an arc-shaped guide rail is fixedly connected to the top of the sealing plate, and the arc-shaped guide rail slides within the arc-shaped groove.
[0013] Preferably, the installation mechanism includes a plurality of symmetrically arranged installation blocks fixedly connected to the top of the sealing plate, and bolts are inserted into the side walls of the installation blocks, with nuts threadedly connected to the side walls of the bolts.
[0014] A method for sealing gas drainage boreholes includes the following steps: S1: When it is necessary to seal the borehole body, the two sealing plates are spliced together by the installation mechanism and fitted onto the side wall of the extraction pipe. Then, the first rocker wheel is rotated. The rotation of the first rocker wheel drives the rotation of the rotating rod, which in turn drives the rotation of the first threaded rod and the second pointed cone, thereby screwing the first threaded rod into the soil. At the same time, the insertion rod is inserted into the soil, so that the sealing plate abuts against the top of the borehole body, forming a sealing effect. S2: When gas extraction is performed, the extraction pipe moves up and down reciprocally. When the extraction pipe moves upward, the rubber wheel and the third rotating shaft rotate counterclockwise, and the second fixed ring rotates synchronously through the second connecting mechanism, so that the limiting surface abuts against the side wall of the slot, thereby pushing the first fixed ring and the first rotating shaft to rotate synchronously. S3: The rotation of the first shaft drives the rotation of the active bevel gear, which in turn drives the rotation of the rubber wheel and the first threaded rod. When the extraction tube moves downward, the rubber wheel and the third shaft rotate clockwise. At this time, the inclined surface abuts against the side wall of the slot, causing the block to slide out of the slot. At the same time, the first spring is compressed. At this time, the first threaded rod will not reverse. Thus, the reciprocating movement of the extraction tube during operation can be used to squeeze the sealing plate, ensuring the squeezing force between the sealing plate and the top of the borehole body, preventing loosening, and thus ensuring the sealing effect. S4: When the sealing plate is pressed against the top of the borehole body, when the third rotating shaft continues to rotate counterclockwise, the first and second rotating shafts cannot continue to rotate. At this time, the pin slides out of the insertion hole and slides at the end of the second rotating shaft. At the same time, the second spring is compressed to ensure that the rubber wheel and the third rotating shaft can rotate normally, avoid jamming, and ensure the normal movement of the extraction pipe. S5: Furthermore, by rotating the second rocker wheel, the rotation of the second rocker wheel drives the rotation of the second threaded rod, which in turn drives the movement of the moving disc, thereby adjusting the initial compression of the second spring and thus adjusting the maximum extrusion pressure between the sealing plate and the top of the borehole body. This makes it more versatile and has a better performance.
[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The gas extraction borehole sealing mechanism and method, by setting a first connecting mechanism, when it is necessary to seal the borehole body, two sealing plates are spliced together by the installation mechanism and sleeved on the side wall of the extraction pipe. Then, the first rocker wheel is rotated, and the rotation of the first rocker wheel drives the rotation of the rotating rod, which in turn drives the rotation of the first threaded rod and the second pointed cone, thereby screwing the first threaded rod into the soil. At the same time, the insertion rod is inserted into the soil, so that the sealing plate abuts against the top of the borehole body, forming a sealing effect. In addition, when gas extraction is carried out, the extraction pipe moves up and down. When the extraction pipe moves upward, the rubber wheel and the third rotating shaft rotate counterclockwise, and through The second connecting mechanism drives the second fixed ring to rotate synchronously, causing the limiting surface to abut against the side wall of the slot. This, in turn, pushes the first fixed ring and the first rotating shaft to rotate synchronously. The rotation of the first rotating shaft drives the rotation of the active bevel gear, which in turn drives the rotation of the rubber wheel and the first threaded rod. When the extraction tube moves downward, the rubber wheel and the third rotating shaft rotate clockwise. At this time, the inclined surface abuts against the side wall of the slot, causing the block to slide out of the slot. Simultaneously, the first spring is compressed. At this time, the first threaded rod will not reverse. Thus, the reciprocating movement of the extraction tube during operation can be used to squeeze the sealing plate, ensuring the squeezing force between the sealing plate and the top of the borehole body, preventing loosening, and thus ensuring the sealing effect.
[0016] (2) The gas extraction borehole sealing mechanism and method, by setting a second connecting mechanism and a moving mechanism, when the sealing plate is pressed against the top of the borehole body, when the third rotating shaft continues to rotate counterclockwise, the first and second rotating shafts cannot continue to rotate. At this time, the pin slides out of the insertion hole and slides at the end of the second rotating shaft. At the same time, the second spring is compressed to ensure that the rubber wheel and the third rotating shaft can rotate normally, avoid jamming, and ensure the normal movement of the extraction pipe. Furthermore, by rotating the second rocker wheel, the rotation of the second rocker wheel drives the rotation of the second threaded rod, which in turn drives the movement of the moving disk, thereby adjusting the initial compression of the second spring and adjusting the maximum extrusion pressure between the sealing plate and the top of the borehole body. It has stronger applicability and better performance. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram showing the positions of the first connecting mechanism and the second connecting mechanism in this invention; Figure 3 This is a schematic diagram showing the position of the moving mechanism in this invention; Figure 4 for Figure 1 Enlarged structural diagram at point A; Figure 5 for Figure 2 Enlarged structural diagram at point B; Figure 6 for Figure 3 Enlarged structural diagram at point C; Figure 7 for Figure 4 Enlarged structural diagram at point D; Figure 8 for Figure 5 A magnified structural diagram at point E in the middle.
[0018] In the diagram: 1. Drilling body; 2. Mounting mechanism; 201. Mounting block; 202. Bolt; 203. Nut; 3. First connecting mechanism; 301. First fixing ring; 302. Second fixing ring; 303. Slot; 304. Locking block; 305. Inclined surface; 306. Limiting surface; 4. First telescopic mechanism; 401. First T-shaped guide rod; 402. First spring; 5. Second connecting mechanism; 501. Insertion hole; 502. Moving disk; 503. Pin; 6. Moving mechanism; 601. First connecting block; 602. Second connecting block; 603. First sleeve; 604. First sleeve rod; 605. Threaded pipe; 606. Second threaded rod; 607. Second rocker wheel; 7. Sliding mechanism; 701. Arc groove; 702. Arc guide rail; 8. Reset mechanism; 801. Fixing block; 80 2. Second sleeve; 803. Third spring; 804. Sliding disc; 805. Second sleeve rod; 806. Push block; 9. Second telescopic mechanism; 901. Second T-shaped guide rod; 902. Connecting disc; 903. Second spring; 10. Extraction pipe; 11. Sealing plate; 12. Semi-circular groove; 13. Sealing gasket; 14. Insert rod; 15. First cone; 16. First threaded rod; 17. Second cone; 18. L-shaped plate; 19. Rotating rod; 20. First rocker wheel; 21. Drive mechanism; 2101. Driven bevel gear; 2102. Moving plate; 2103. First support plate; 2104. First rotating shaft; 2105. Driving bevel gear; 2106. Second support plate; 2107. Second rotating shaft; 2108. Third support plate; 2109. Third rotating shaft; 2110. Rubber wheel. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Please see Figures 1-8 This invention provides a technical solution: a gas extraction borehole sealing mechanism, comprising an extraction pipe 10 disposed within a borehole body 1, the extraction pipe 10 reciprocating up and down within the borehole body 1, two symmetrically arranged sealing plates 11 sleeved on the side wall of the extraction pipe 10, the two sealing plates 11 being detachably connected by an installation mechanism 2, a semi-circular groove 12 formed on the side wall of the sealing plate 11, a sealing gasket 13 fixedly connected within the semi-circular groove 12, and an insertion rod 14 fixedly connected to the bottom of the sealing plate 11. The lower end of the insertion rod 14 is fixedly connected to a first pointed cone 15, the bottom of the sealing plate 11 is rotatably connected to a first threaded rod 16, the lower end of the first threaded rod 16 is fixedly connected to a second pointed cone 17, the top of the sealing plate 11 is fixedly connected to an L-shaped plate 18, the bottom of the L-shaped plate 18 is rotatably connected to a rotating rod 19, the lower end of the rotating rod 19 is fixed to the upper end of the first threaded rod 16, and the upper end of the rotating rod 19 is fixedly connected to a first rocker wheel 20. The rotation of the rotating rod 19 is driven by the driving mechanism 21. The drive mechanism 21 includes a driven bevel gear 2101 fixedly sleeved on the side wall of the rotating rod 19, and a moving plate 2102 slidably connected to the top of the sealing plate 11 via a reset mechanism 8. A first support plate 2103 is fixedly connected to the top of the moving plate 2102, and a driving bevel gear 2105 is rotatably connected to the side wall of the first support plate 2103 via a first rotating shaft 2104. A second support plate 2106 is fixedly connected to the top of the moving plate 2102, and a second rotating shaft 2107 is rotatably connected to the side wall of the second support plate 2106. A third support plate 2108 is fixedly connected to the top of the moving plate 2102. The side wall of the third support plate 2108 is rotatably connected to a rubber wheel 2110 via a third rotating shaft 2109. A first connecting mechanism 3 is provided between the second rotating shaft 2107 and the first rotating shaft 2104, and a second connecting mechanism 5 is provided between the third rotating shaft 2109 and the second rotating shaft 2107. The reciprocating movement of the extraction pipe 10 during operation can be used to compress the sealing plate 11, ensuring the compressive force between the sealing plate 11 and the top of the borehole body 1, preventing loosening, and thus ensuring the sealing effect. Furthermore, the maximum compressive force between the sealing plate 11 and the top of the borehole body 1 can be adjusted, making it more applicable and having a better performance.
[0021] The first connecting mechanism 3 includes a first fixing ring 301 fixedly sleeved on the side wall of the first rotating shaft 2104, and the end of the first fixing ring 301 has a plurality of arrayed slots 303. The side wall of the second rotating shaft 2107 is fixedly sleeved with a second fixing ring 302, and the end of the second fixing ring 302 is connected to a locking block 304 through the first telescopic mechanism 4. The locking block 304 is inserted into the slot 303, and the locking block 304 includes an inclined surface 305 and a limiting surface 306. When the extraction tube 10 moves upward, the rubber wheel 2110 and the third rotating shaft 2109 rotate counterclockwise, and the second fixing ring 301 is driven by the second connecting mechanism 5. 2. The limiting surface 306 abuts against the side wall of the slot 303, thereby pushing the first fixing ring 301 and the first rotating shaft 2104 to rotate synchronously. The rotation of the first rotating shaft 2104 drives the rotation of the active bevel gear 2105, which in turn drives the rotation of the rubber wheel 2110 and the first threaded rod 16. When the extraction tube 10 moves downward, the rubber wheel 2110 and the third rotating shaft 2109 rotate clockwise. At this time, the inclined surface 305 abuts against the side wall of the slot 303, thereby causing the locking block 304 to slide out of the slot 303. At the same time, the first spring 402 is compressed. At this time, the first threaded rod 16 will not reverse.
[0022] The first telescopic mechanism 4 includes a plurality of first T-shaped guide rods 401 arranged in an array at the end of the second fixed ring 302, and one end of the first T-shaped guide rod 401 is fixed to the side wall of the locking block 304. A first spring 402 is sleeved on the side wall of the first T-shaped guide rod 401, which guides and resets the movement of the locking block 304.
[0023] The second connecting mechanism 5 includes multiple arrayed insertion holes 501 at the end of the second rotating shaft 2107, and a moving disk 502 is connected to the side wall of the third support plate 2108 via a moving mechanism 6. The end of the moving disk 502 is connected to a pin 503 via a second telescopic mechanism 9, and the pin 503 is inserted into the insertion hole 501. When the sealing plate 11 is pressed against the top of the drilling body 1, when the third rotating shaft 2109 continues to rotate counterclockwise, the first rotating shaft 2104 and the second rotating shaft 2107 cannot continue to rotate. At this time, the pin 503 slides out from the insertion hole 501 and slides at the end of the second rotating shaft 2107. At the same time, the second spring 903 is compressed to ensure that the rubber wheel 2110 and the third rotating shaft 2109 can rotate normally, avoid jamming, and ensure the normal movement of the extraction tube 10.
[0024] The second telescopic mechanism 9 includes multiple arrays of second T-shaped guide rods 901 inserted into the end of the movable disk 502. One end of the second T-shaped guide rod 901 is fixedly connected to the connecting disk 902, and one end of the pin 503 is fixedly connected to the end of the connecting disk 902. A second spring 903 is sleeved on the side wall of the second T-shaped guide rod 901, which guides and resets the movement of the pin 503.
[0025] The moving mechanism 6 includes two symmetrically arranged first connecting blocks 601 fixedly connected to the side wall of the third rotating shaft 2109, and two symmetrically arranged second connecting blocks 602 fixedly connected to the end of the moving disk 502. A first sleeve 603 is fixedly connected to the side wall of each first connecting block 601, and a first sleeve rod 604 is inserted into the first sleeve 603. The other end of the first sleeve rod 604 is fixed to the side wall of the second connecting block 602. A threaded tube 605 is fixedly connected to the side wall of the first connecting block 601. The second threaded rod 606 is threadedly connected, and the other end of the second threaded rod 606 is rotatably connected to the side wall of the second connecting block 602 and fixedly connected to the second rocker wheel 607. By rotating the second rocker wheel 607, the rotation of the second rocker wheel 607 drives the rotation of the second threaded rod 606, which in turn drives the movement of the moving disk 502. This allows for adjustment of the initial compression of the second spring 903, thereby adjusting the maximum extrusion pressure between the sealing plate 11 and the top of the drilling body 1. This makes the device more versatile and provides better performance.
[0026] The reset mechanism 8 includes a fixed block 801 fixedly connected to the top of the sealing plate 11, and a second sleeve 802 fixedly connected to the side wall of the fixed block 801. A sliding disk 804 is slidably connected inside the second sleeve 802 via a third spring 803, and a second sleeve rod 805 is fixedly connected to the end of the sliding disk 804. A push block 806 is fixedly connected to the side wall of the moving plate 2102, and the end of the second sleeve rod 805 slides on the side wall of the push block 806. The moving plate 2102 is slidably connected to the top of the sealing plate 11 via a sliding mechanism 7. The third spring 803 pushes the sliding disk 804 and the second sleeve rod 805 to ensure that the end of the second sleeve rod 805 always slides on the side wall of the push block 806. When the rubber wheel 2110 wears, it can push the moving plate 2102 to move, thereby ensuring that the rubber wheel 2110 always abuts against the side wall of the extraction tube 10 and can rotate normally.
[0027] The sliding mechanism 7 includes an arc-shaped groove 701 formed at the bottom of the moving plate 2102, and an arc-shaped guide rail 702 fixedly connected to the top of the sealing plate 11. The arc-shaped guide rail 702 slides in the arc-shaped groove 701, which guides and resets the movement of the moving plate 2102.
[0028] The installation mechanism 2 includes a plurality of symmetrically arranged installation blocks 201 fixedly connected to the top of the sealing plate 11, and bolts 202 are inserted into the side wall of the installation block 201. Nuts 203 are threadedly connected to the side wall of the bolts 202, which facilitates the installation and removal of the two sealing plates 11.
[0029] A method for sealing gas drainage boreholes includes the following steps: S1: When it is necessary to seal the borehole body 1, the two sealing plates 11 are spliced together by the installation mechanism 2 and sleeved on the side wall of the extraction pipe 10. Then, the first rocker wheel 20 is rotated. The rotation of the first rocker wheel 20 drives the rotation of the rotating rod 19, which in turn drives the rotation of the first threaded rod 16 and the second pointed cone 17, thereby screwing the first threaded rod 16 into the soil. At the same time, the insertion rod 14 is inserted into the soil, so that the sealing plate 11 abuts against the top of the borehole body 1, forming a sealing effect. S2: During gas extraction, the extraction pipe 10 moves up and down reciprocally. When the extraction pipe 10 moves upward, the rubber wheel 2110 and the third rotating shaft 2109 rotate counterclockwise, and the second fixed ring 302 rotates synchronously through the second connecting mechanism 5, so that the limiting surface 306 abuts against the side wall of the slot 303, thereby pushing the first fixed ring 301 and the first rotating shaft 2104 to rotate synchronously. S3: The rotation of the first rotating shaft 2104 drives the rotation of the active bevel gear 2105, which in turn drives the rotation of the rubber wheel 2110 and the first threaded rod 16. When the extraction tube 10 moves downward, the rubber wheel 2110 and the third rotating shaft 2109 rotate clockwise. At this time, the inclined surface 305 abuts against the side wall of the slot 303, so that the locking block 304 slides out of the slot 303. At the same time, the first spring 402 is compressed. At this time, the first threaded rod 16 will not reverse. Thus, the reciprocating movement of the extraction tube 10 during operation can be used to squeeze the sealing plate 11, ensuring the squeezing force between the sealing plate 11 and the top of the borehole body 1, preventing loosening, and thus ensuring the sealing effect. S4: When the sealing plate 11 is pressed against the top of the borehole body 1, when the third rotating shaft 2109 continues to rotate counterclockwise, the first rotating shaft 2104 and the second rotating shaft 2107 cannot continue to rotate. At this time, the pin 503 slides out from the insertion hole 501 and slides at the end of the second rotating shaft 2107. At the same time, the second spring 903 is compressed to ensure that the rubber wheel 2110 and the third rotating shaft 2109 can rotate normally, avoid jamming, and ensure the normal movement of the extraction tube 10. S5: Furthermore, by rotating the second rocker wheel 607, the rotation of the second rocker wheel 607 drives the rotation of the second threaded rod 606, which in turn drives the movement of the moving disk 502, thereby adjusting the initial compression of the second spring 903, and thus adjusting the maximum extrusion pressure between the sealing plate 11 and the top of the drilling body 1, making it more applicable and having a better effect.
Claims
1. A gas extraction borehole sealing mechanism, comprising an extraction pipe (10) disposed within a borehole body (1), wherein the extraction pipe (10) reciprocates up and down within the borehole body (1), characterized in that: The extraction pipe (10) has two symmetrically arranged sealing plates (11) fitted on its side wall, and the two sealing plates (11) are detachably connected by an installation mechanism (2). The side wall of the sealing plate (11) has a semi-circular groove (12), and a sealing gasket (13) is fixedly connected in the semi-circular groove (12). The bottom of the sealing plate (11) is fixedly connected to a rod (14), and the lower end of the rod (14) is fixedly connected to a first pointed cone (15). The bottom of the sealing plate (11) is rotatably connected to... A first threaded rod (16) is connected to the first threaded rod (16), and a second pointed cone (17) is fixedly connected to the lower end of the first threaded rod (16). An L-shaped plate (18) is fixedly connected to the top of the sealing plate (11), and a rotating rod (19) is rotatably connected to the bottom of the L-shaped plate (18). The lower end of the rotating rod (19) is fixed to the upper end of the first threaded rod (16), and a first rocker wheel (20) is fixedly connected to the upper end of the rotating rod (19). The rotation of the rotating rod (19) is driven by a driving mechanism (21). The drive mechanism (21) includes a driven bevel gear (2101) fixedly sleeved on the side wall of the rotating rod (19), and a moving plate (2102) is slidably connected to the top of the sealing plate (11) through a reset mechanism (8). A first support plate (2103) is fixedly connected to the top of the moving plate (2102), and a driving bevel gear (2105) is rotatably connected to the side wall of the first support plate (2103) through a first rotating shaft (2104). A second support plate (2106) is fixedly connected to the top of the moving plate (2102). The second support plate (2106) is rotatably connected to the side wall of the second support plate (2107), the top of the movable plate (2102) is fixedly connected to the third support plate (2108), and the side wall of the third support plate (2108) is rotatably connected to the rubber wheel (2110) through the third shaft (2109). A first connecting mechanism (3) is provided between the second shaft (2107) and the first shaft (2104), and a second connecting mechanism (5) is provided between the third shaft (2109) and the second shaft (2107).
2. The gas extraction borehole plugging mechanism according to claim 1, characterized in that: The first connecting mechanism (3) includes a first fixing ring (301) fixedly sleeved on the side wall of the first rotating shaft (2104), and the end of the first fixing ring (301) is provided with a plurality of arrayed slots (303). The side wall of the second rotating shaft (2107) is fixedly sleeved with a second fixing ring (302), and the end of the second fixing ring (302) is connected to a block (304) through a first telescopic mechanism (4). The block (304) is inserted into the slot (303), and the block (304) includes an inclined surface (305) and a limiting surface (306).
3. The gas extraction borehole plugging mechanism according to claim 2, characterized in that: The first telescopic mechanism (4) includes a plurality of first T-shaped guide rods (401) arranged in an array at the end of the second fixed ring (302), and one end of the first T-shaped guide rod (401) is fixed to the side wall of the locking block (304), and a first spring (402) is sleeved on the side wall of the first T-shaped guide rod (401).
4. The gas extraction borehole plugging mechanism according to claim 1, characterized in that: The second connecting mechanism (5) includes multiple arrayed insertion holes (501) opened at the end of the second rotating shaft (2107), and the side wall of the third support plate (2108) is connected to a movable disk (502) through a moving mechanism (6). The end of the movable disk (502) is connected to a pin (503) through a second telescopic mechanism (9), and the pin (503) is inserted into the insertion hole (501).
5. A gas extraction borehole plugging mechanism according to claim 4, characterized in that: The second telescopic mechanism (9) includes a plurality of second T-shaped guide rods (901) arranged in an array at the end of the movable disk (502), and one end of the second T-shaped guide rod (901) is fixedly connected to the connecting disk (902), one end of the pin (503) is fixedly connected to the end of the connecting disk (902), and a second spring (903) is sleeved on the side wall of the second T-shaped guide rod (901).
6. A gas extraction borehole plugging mechanism according to claim 4, characterized in that: The moving mechanism (6) includes two symmetrically arranged first connecting blocks (601) fixedly connected to the side wall of the third rotating shaft (2109), and two symmetrically arranged second connecting blocks (602) fixedly connected to the end of the moving disk (502). A first sleeve (603) is fixedly connected to the side wall of the first connecting block (601), and a first sleeve rod (604) is inserted into the first sleeve (603). The other end of the first sleeve rod (604) is fixed to the side wall of the second connecting block (602), and a threaded tube (605) is fixedly connected to the side wall of the first connecting block (601). A second threaded rod (606) is threadedly connected to the threaded tube (605), and the other end of the second threaded rod (606) is rotatably connected to the side wall of the second connecting block (602) and fixedly connected to a second rocker wheel (607).
7. A gas extraction borehole plugging mechanism according to claim 1, characterized in that: The reset mechanism (8) includes a fixed block (801) fixedly connected to the top of the sealing plate (11), and a second sleeve (802) fixedly connected to the side wall of the fixed block (801). A sliding disc (804) is slidably connected inside the second sleeve (802) by a third spring (803), and a second sleeve rod (805) is fixedly connected to the end of the sliding disc (804). A push block (806) is fixedly connected to the side wall of the moving plate (2102), and the end of the second sleeve rod (805) slides on the side wall of the push block (806). The moving plate (2102) is slidably connected to the top of the sealing plate (11) through a sliding mechanism (7).
8. A gas extraction borehole plugging mechanism according to claim 7, characterized in that: The sliding mechanism (7) includes an arc groove (701) opened at the bottom of the moving plate (2102), and an arc guide rail (702) is fixedly connected to the top of the sealing plate (11), and the arc guide rail (702) slides in the arc groove (701).
9. A gas drainage borehole plugging mechanism according to claim 1, characterized in that: The installation mechanism (2) includes a plurality of symmetrically arranged installation blocks (201) fixedly connected to the top of the sealing plate (11), and bolts (202) are inserted into the side wall of the installation blocks (201), and nuts (203) are threadedly connected to the side wall of the bolts (202).
10. A method for sealing a gas drainage borehole, utilizing a gas drainage borehole sealing mechanism as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: When it is necessary to seal the borehole body (1), the two sealing plates (11) are spliced together by the installation mechanism (2) and sleeved on the side wall of the extraction pipe (10). Then, the first rocker wheel (20) is rotated. The rotation of the first rocker wheel (20) drives the rotation of the rotating rod (19), which in turn drives the rotation of the first threaded rod (16) and the second cone (17), thereby screwing the first threaded rod (16) into the soil. At the same time, the insertion rod (14) is inserted into the soil, so that the sealing plate (11) abuts against the top of the borehole body (1). S2: When gas extraction is performed, the extraction pipe (10) moves up and down. When the extraction pipe (10) moves upward, the rubber wheel (2110) and the third rotating shaft (2109) rotate counterclockwise, and drive the second fixed ring (302) to rotate synchronously through the second connecting mechanism (5), so that the limiting surface (306) abuts against the side wall of the slot (303), thereby pushing the first fixed ring (301) and the first rotating shaft (2104) to rotate synchronously. S3: The rotation of the first rotating shaft (2104) drives the rotation of the active bevel gear (2105), which in turn drives the rotation of the rubber wheel (2110) and the first threaded rod (16). When the extraction tube (10) moves downward, the rubber wheel (2110) and the third rotating shaft (2109) rotate clockwise. At this time, the inclined surface (305) abuts against the side wall of the slot (303), so that the block (304) slides out of the slot (303). At the same time, the first spring (402) is compressed. At this time, the first threaded rod (16) will not reverse. Thus, the reciprocating movement of the extraction tube (10) during operation can be used to squeeze the sealing plate (11) to ensure the squeezing force between the sealing plate (11) and the top of the borehole body (1) and avoid loosening. S4: When the sealing plate (11) is pressed against the top of the borehole body (1), when the third rotating shaft (2109) continues to rotate counterclockwise, the first rotating shaft (2104) and the second rotating shaft (2107) cannot continue to rotate. At this time, the pin (503) slides out from the insertion hole (501) and slides at the end of the second rotating shaft (2107). At the same time, the second spring (903) is compressed to ensure that the rubber wheel (2110) and the third rotating shaft (2109) can rotate normally, avoid jamming, and ensure the normal movement of the extraction pipe (10). S5: Furthermore, by rotating the second rocker wheel (607), the rotation of the second rocker wheel (607) drives the rotation of the second threaded rod (606), which in turn drives the movement of the moving disk (502), thereby adjusting the initial compression of the second spring (903), and thus adjusting the maximum extrusion pressure between the sealing plate (11) and the top of the borehole body (1).
Citation Information
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