An anti-seepage structure for underground mine drainage pipeline

Abstract

The application discloses a kind of underground mine drainage pipeline anti-seepage structures, it is related to underground mine drainage field, including connecting sleeve and two pipeline bodies, the surface of connecting sleeve both ends is all sleeved with second protective sleeve, the surface of pipeline body is sleeved in one end of second protective sleeve, two the opposite end of pipeline body is fixedly connected with connector, sealing groove is arranged between two connector, and sealing pad is installed between two connector, and sealing pad is clamped in sealing groove inside.The application, through the sealing groove between two connector, sealing pad and connecting sleeve, and then can keep good sealing effect when thermal expansion and cold shrink appear in connector, and there is activity space when thermal expansion and cold shrink appear, avoid rupture, seepage because of extrusion, by clamping groove, first spring and fixed rod, and using installation hole, rotating column, linkage rod drives the friction force of moving rod moving in limit slot to increase the difficulty of linkage rod unfolding, to improve sealing property.

Description

Technical Field

[0001] The present invention relates to the technical field of underground mine drainage, in particular to an anti-seepage structure for underground mine drainage pipelines. Background Art

[0002] Underground mine drainage systems are a key production system. Groundwater, such as gushing water, is pumped through underground pipes to surface pools. Drainage pipes installed within the mineshaft are often made of steel pipes, connected by bolts and quick-connect couplings.

[0003] However, existing technologies involve a temperature difference between underground mines and the surface environment, and mine drainage is often discontinuous during daily production. Therefore, when the steel pipes in the well are not draining, the ambient temperature of the upper portion of the pipes is roughly equal to the air temperature. However, during drainage, the temperature of the underground water is significantly higher than the surface air temperature, and the pipes are affected by the water temperature, causing significant thermal expansion and contraction. This causes the joints between the pipes to expand and contract, resulting in minor cracks, loosening, and water seepage. Summary of the Invention

[0004] The present invention aims to provide an anti-seepage structure for underground mine drainage pipes to address the aforementioned background art issue: during drainage, the temperature of the underground water is significantly higher than the surface air temperature, causing the drainage steel pipes to expand and contract significantly due to the water temperature. This causes the joints between the drainage steel pipes to expand and contract as well, resulting in minor cracking, loosening, and water seepage.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an anti-seepage structure for underground mine drainage pipes, comprising a connecting sleeve and two pipe bodies, wherein both end surfaces of the connecting sleeve are sleeved with a second protective sleeve, one end of the second protective sleeve is sleeved on the surface of the pipe body, and the two pipe bodies are fixedly connected to the opposite ends thereof with a connecting head, a sealing groove is provided between the two connecting heads, and a sealing gasket is installed between the two connecting heads, the sealing gasket is clamped inside the sealing groove, a fixing rod is fixedly connected to the outer edge of one end of the connecting head, a clamping groove is provided inside the connecting sleeve, a first spring is sleeved on the surface of the fixing rod, one end of the first spring is fixedly connected to the connecting head, and the other end of the first spring is installed inside the clamping groove, a receiving groove is provided in the center of the inner cavity of the connecting sleeve, and a sealing mechanism is provided inside the receiving groove;

[0006] The sealing mechanism includes an outer ring and a pushing block, one end of the pushing block abuts against the sealing gasket, a limiting groove is provided on the inner edge of the outer ring, a moving rod is slidingly arranged inside the limiting groove, mounting holes are provided at both corners of the pushing block, a rotating shaft is provided inside the mounting hole, two linkage rods are provided on one side of the pushing block, one end of the linkage rod is rotatably connected to the moving rod, and the other end of the linkage rod is rotatably connected to the rotating shaft, and a thrust assembly is provided between the two linkage rods.

[0007] Preferably, the thrust assembly includes a mounting frame and a movable sleeve, one end of the mounting frame is fixedly connected to the outer ring, the movable sleeve is slidably sleeved on one side of the mounting frame, both ends of the movable sleeve are fixedly connected to the limit plate, a movable rod is provided on the inside of the movable sleeve, one end of the movable rod is fixedly connected to the push block, and the other end of the movable rod passes through the movable sleeve.

[0008] Preferably, the outer diameter of the limiting plate is larger than the diameter of the circular notch at one end of the mounting frame, and the diameter of the movable rod is smaller than the inner diameter of the limiting plate and the movable sleeve.

[0009] Preferably, a second spring is sleeved on the surface of one end of the movable sleeve, one end of the second spring is fixedly connected to the mounting bracket, and the other end of the second spring is fixedly connected to one of the limiting plates.

[0010] Preferably, a third spring is sleeved on the surface of the movable rod, one end of the third spring is fixedly connected to the pushing block, and the other end of the third spring is fixedly connected to one of the limiting plates.

[0011] Preferably, two first protective sleeves are sleeved on the surface of the connecting sleeve, and the outer walls of the two first protective sleeves facing each other are fixedly connected with convex plates. A connecting screw is provided between the two convex plates, and nuts are sleeved on the surfaces of both ends of the connecting screw.

[0012] Preferably, outer walls at both ends of the two first protective covers are fixedly connected with arc-shaped plates, and one side of the arc-shaped plates is fixedly connected with a plug-in rod.

[0013] Preferably, a fixing ring is fixedly sleeved on the outer wall of the second protective sleeve, and a guide hole is opened on the surface of the fixing ring.

[0014] Preferably, one end of the plug-in rod is plugged into the guide hole, and a thread is provided on the outer surface of one end of the plug-in rod, and a nut is sleeved on the surface of one end of the plug-in rod.

[0015] Preferably, the inner diameter of one end of the second protective sleeve is larger than the outer diameter of the pipe body, and the inner diameter of one end of the second protective sleeve is smaller than the outer diameters of both ends of the connecting sleeve, and the inner diameter of the other end of the second protective sleeve is larger than the outer diameter of the connecting sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the sealing gasket can be easily installed through the sealing groove between the two connecting heads, and thus a good sealing effect can be maintained when the connecting head expands and contracts with heat. On this basis, the connecting sleeve can provide the connecting head with movement space when the connecting head expands and contracts with heat, thereby avoiding cracking and water seepage due to extrusion. In addition, the card slot, the first spring and the fixing rod can further improve the sealing performance, and the elasticity of the spring can avoid water seepage after multiple thermal expansion and contraction. In addition, after the sealing gasket is deformed, it will drive the pushing block to move, and then the mounting hole, the rotating column and the linkage rod will be used to drive the moving rod inside the limit groove, so that the linkage rods on both sides of the pushing block are expanded. In this process, the friction force of the moving rod moving inside the limit groove can increase the difficulty of expanding the linkage rod, thereby reducing the degree of deformation of the sealing gasket.

[0018] 2. In the present invention, the mounting frame, movable rod, limit plate and movable sleeve can enable the sealing gasket to start moving after being squeezed and deformed, or after being thermally expanded. At this time, the third spring and the second spring will be squeezed and deformed, so that the elasticity of the two springs can be used to prevent the sealing gasket from being greatly deformed after being squeezed. At the same time, when the sealing gasket is squeezed, the reaction of the thrust assembly can be used to make the sealing gasket and the connector contact more closely.

[0019] 3. In the present invention, the second protective sleeve can be simultaneously sleeved on the surface of the connecting sleeve and the pipe body, thereby improving the sealing performance and also protecting the first protective sleeve and the pipe body. Finally, the first protective sleeve and the second protective sleeve are connected by the arc plate, the fixing ring, the connecting screw and the plug-in rod, which can further improve the overall protection effect and the firmness of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of an anti-seepage structure for underground mine drainage pipes according to the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of a connecting sleeve of an anti-seepage structure for underground mine drainage pipes according to the present invention;

[0022] Figure 3 This is a schematic cross-sectional view of an anti-seepage structure for an underground mine drainage pipeline according to the present invention;

[0023] Figure 4 This is a schematic cross-sectional view of a connecting sleeve of an anti-seepage structure for an underground mine drainage pipe according to the present invention;

[0024] Figure 5 This is a schematic diagram of the connector structure of an anti-seepage structure for underground mine drainage pipes according to the present invention;

[0025] Figure 6This is a structural schematic diagram of a sealing mechanism and a sealing gasket in an anti-seepage structure for underground mine drainage pipes according to the present invention;

[0026] Figure 7 This is a structural schematic diagram of a sealing mechanism in an anti-seepage structure for underground mine drainage pipes according to the present invention;

[0027] Figure 8 The present invention is a structural schematic diagram of a thrust assembly in an anti-seepage structure of an underground mine drainage pipeline.

[0028] In the figure: 1. first protective sleeve; 11. curved plate; 12. convex plate; 13. plug-in rod; 2. connecting sleeve; 21. accommodating groove; 3. pipe body; 31. sealing groove; 32. fixing rod; 33. card slot; 34. first spring; 35. connector; 4. second protective sleeve; 41. fixing ring; 411. guide hole; 5. sealing mechanism; 51. outer ring; 52. limiting groove; 521. moving rod; 53. thrust assembly; 531. mounting bracket; 532. movable rod; 533. second spring; 534. third spring; 535. limiting plate; 536. movable sleeve; 54. linkage rod; 55. pushing block; 551. mounting hole; 56. rotating shaft; 6. sealing gasket. Implementation Method

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example

[0030] Reference Figure 1-7 As shown: An anti-seepage structure for underground mine drainage pipes, including a connecting sleeve 2 and two pipe bodies 3, the surfaces of both ends of the connecting sleeve 2 are sleeved with a second protective sleeve 4, one end of the second protective sleeve 4 is sleeved on the surface of the pipe body 3, and the opposite ends of the two pipe bodies 3 are fixedly connected with a connecting head 35, a sealing groove 31 is provided between the two connecting heads 35, and a sealing gasket 6 is installed between the two connecting heads 35, and the sealing gasket 6 is clamped inside the sealing groove 31, and a fixing rod 32 is fixedly connected to the outer edge of one end of the connecting head 35, a clamping groove 33 is provided inside the connecting sleeve 2, and a first spring 34 is sleeved on the surface of the fixing rod 32, one end of the first spring 34 is fixedly connected to the connecting head 35, and the other end of the first spring 34 is installed inside the clamping groove 33, a receiving groove 21 is provided in the center of the inner cavity of the connecting sleeve 2, and a sealing mechanism 5 is provided inside the receiving groove 21;

[0031] The sealing mechanism 5 includes an outer ring 51 and a pushing block 55. One end of the pushing block 55 abuts against the sealing gasket 6. A limiting groove 52 is provided on the inner edge of the outer ring 51. A moving rod 521 is slidingly arranged inside the limiting groove 52. Mounting holes 551 are provided at both corners of the pushing block 55. A rotating shaft 56 is arranged inside the mounting hole 551. Two linkage rods 54 are provided on one side of the pushing block 55. One end of the linkage rod 54 is rotatably connected to the moving rod 521, and the other end of the linkage rod 54 is rotatably connected to the rotating shaft 56. A thrust assembly 53 is provided between the two linkage rods 54.

[0032] In this embodiment, after conveying downhole water, the pipe body 3 and connector 35 deform due to thermal expansion. At this time, the two connectors 35 begin to squeeze the sealing gasket 6. The space within the cavity of the connecting sleeve 2 also allows space for the connector 35 to deform after thermal expansion. After the conveying is completed, the connector 35 is no longer exposed to heat and begins to contract. As the connector 35 expands and contracts repeatedly, the sealing gasket 6 also deforms and is squeezed by the connector 35. Therefore, the sealing gasket 6 can ensure the sealing during the thermal expansion and contraction process.

[0033] When the sealing gasket 6 is deformed multiple times and cannot return to its original shape, the elasticity of the first spring 34 can be used to apply a force to the connector 35, thereby making the two connectors 35 squeeze the sealing gasket 6 more tightly. Due to the presence of the first spring 34, the connector 35 can be prevented from becoming loose due to repeated thermal expansion and contraction, which can lead to water seepage.

[0034] During the deformation process of the sealing gasket 6, the multiple pushing blocks 55 on its outer edge will also be subjected to extrusion force, and then the pushing block 55 can use the rotating shaft 56 to push the linkage rod 54 to start moving, so that the two linkage rods 54 are unfolded. During this process, the linkage rod 54 will also drive the moving rod 521 to slide inside the limiting groove 52. Since the moving rod 521 will start to move due to the thrust of the linkage rod 54, the moving rod 521 will also squeeze the inner wall of the limiting groove 52 while moving inside the limiting groove 52, so that the friction between the moving rod 521 and the limiting groove 52 increases. Therefore, the existence of this friction force can increase the difficulty of unfolding the linkage rod 54, thereby reducing the degree of deformation of the sealing gasket 6, thereby further ensuring the sealing performance while ensuring the deformable space. Example

[0035] according to Figure 7 and Figure 8As shown, the thrust assembly 53 includes a mounting bracket 531 and a movable sleeve 536. One end of the mounting bracket 531 is fixedly connected to the outer ring 51. The movable sleeve 536 is slidably connected to one side of the mounting bracket 531. Both ends of the movable sleeve 536 are fixedly connected to a limit plate 535. A movable rod 532 is disposed inside the movable sleeve 536. One end of the movable rod 532 is fixedly connected to the push block 55, and the other end of the movable rod 532 extends through the movable sleeve 536. The outer diameter of the limit plate 535 is larger than the diameter of the circular notch at one end of the mounting bracket 531. The diameter of the movable rod 532 is smaller than the inner diameter of both the limit plate 535 and the movable sleeve 536. A second spring 533 is sleeved on one end of the movable sleeve 536. One end of the second spring 533 is fixedly connected to the mounting bracket 531, and the other end of the second spring 533 is fixedly connected to one of the limit plates 535. A third spring 534 is sleeved on the surface of the movable rod 532 . One end of the third spring 534 is fixedly connected to the pushing block 55 , and the other end of the third spring 534 is fixedly connected to one of the limiting plates 535 .

[0036] In this embodiment, when the pushing block 55 is subjected to force, it will not only drive the linkage rod 54 to move, but also transfer part of the force to the movable rod 532. Therefore, the movable rod 532 can start to slide relative to the movable sleeve 536 inside the movable sleeve 536. During this process, the pushing block 55 will start to squeeze the third spring 534. In the process of squeezing the third spring 534, the third spring 534 will convert part of the force into elastic potential energy for storage, and the other part of the force will be transferred to one of the limit plates 535. Therefore, the limit plate 535 will squeeze the second spring 533 while driving the movable sleeve 536 to move together. Therefore, when the movable sleeve 536 moves with the limit plate 535, it will start to slide relative to the mounting frame 531.

[0037] Next, the elasticity of the second spring 533 and the third spring 534 can be used as resistance when the push block 55 moves, thereby preventing the sealing gasket 6 from being deformed significantly after being squeezed. At the same time, when the sealing gasket 6 is squeezed, the reaction of the thrust assembly 53 can make the sealing gasket 6 and the connector 35 contact more closely. Example

[0038] according to Figure 1-4As shown, two first protective sleeves 1 are sleeved on the surface of the connecting sleeve 2. The outer walls of the two first protective sleeves 1 on the opposite sides are fixedly connected with a convex plate 12. A connecting screw is provided between the two convex plates 12, and nuts are sleeved on the surfaces of both ends of the connecting screw. The outer walls of both ends of the two first protective sleeves 1 are fixedly connected with an arc-shaped plate 11, and a plug-in rod 13 is fixedly connected to one side of the arc-shaped plate 11. A fixing ring 41 is fixedly sleeved on the outer wall of the second protective sleeve 4, and a guide hole 411 is provided on the surface of the fixing ring 41. One end of the plug-in rod 13 is inserted into the guide hole 411, and the outer surface of one end of the plug-in rod 13 is provided with a thread, and a nut is sleeved on the surface of one end of the plug-in rod 13. The inner diameter of one end of the second protective sleeve 4 is larger than the outer diameter of the pipe body 3, and the inner diameter of one end of the second protective sleeve 4 is smaller than the outer diameter of the two ends of the connecting sleeve 2. The inner diameter of the other end of the second protective sleeve 4 is larger than the outer diameter of the connecting sleeve 2.

[0039] In this embodiment, after the connecting sleeve 2 is installed, the first protective sleeve 1 of the same segmented structure can also be installed on the surface of the connecting sleeve 2, and then connected by the convex plate 12, and the connecting screw passes through the convex plate 12, and the first protective sleeve 1 is fixed with the nut. Then, the second protective sleeve 4 on the surface of the pipe body 3 is moved and the second protective sleeve 4 is plugged into one end of the connecting sleeve 2. In this way, the sealing performance can be improved and the first protective sleeve 1 and the pipe body 3 can be protected.

[0040] In addition, when moving the second protective cover 4, the guide hole 411 on the surface of the fixing ring 41 can be matched with the plug-in rod 13, so that the plug-in rod 13 and the guide hole 411 can be plugged in. After the second protective cover 4 is connected to the connecting sleeve 2, a nut can be used to be sleeved on the surface of the plug-in rod 13, and the external thread on one end surface of the plug-in rod 13 can be used to install and fix it. This not only fixes the second protective cover 4, but also improves the firmness of the connection between the first protective cover 1, the connecting sleeve 2, etc.

[0041] The usage and working principle of this device are as follows: start docking the two pipe bodies 3 at one end facing each other, set the sealing gasket 6 between the two connectors 35, and make both sides of the sealing gasket 6 stuck in the card groove 33 inside the connector 35, and then use the sealing gasket 6 to improve the sealing of the connection, and then install the connecting sleeve 2 on the surface of the two connectors 35. The connecting sleeve 2 is composed of two shells in sections and can be easily installed on the surface of the connector 35.

[0042] After the connecting sleeve 2 is installed, the first protective sleeve 1 of the same segmented structure can also be installed on the surface of the connecting sleeve 2, and then connected with the convex plate 12, and the connecting screw passes through the convex plate 12, and the nut is used to fix the first protective sleeve 1. Then, the second protective sleeve 4 on the surface of the pipe body 3 is moved and the second protective sleeve 4 is plugged into one end of the connecting sleeve 2.

[0043] In addition, when moving the second protective cover 4, the guide hole 411 on the surface of the fixing ring 41 can be aligned with the plug-in rod 13, so that the plug-in rod 13 and the guide hole 411 can be plugged into each other. After the second protective cover 4 is connected to the connecting sleeve 2, a nut can be used to be sleeved on the surface of the plug-in rod 13, and the external thread on one end surface of the plug-in rod 13 can be used to install and fix it, thereby completing the fixation of the second protective cover 4.

[0044] Furthermore, after conveying water gushing downhole, the pipe body 3 and connector 35 deform due to thermal expansion. At this point, the two connectors 35 begin to squeeze the gasket 6. The space within the inner cavity of the connecting sleeve 2 also allows for deformation of the connector 35 due to thermal expansion. After conveying is complete, the connector 35 is no longer exposed to heat and begins to contract. As the connector 35 expands and contracts multiple times, the gasket 6 also deforms and is squeezed by the connector 35. This ensures sealing during thermal expansion and contraction.

[0045] When the sealing gasket 6 cannot return to its original shape, the elasticity of the first spring 34 can be used to apply a force to the connector 35, so that the two connectors 35 can squeeze the sealing gasket 6 more tightly. The existence of the first spring 34 can also prevent the connector 35 from becoming loose due to repeated thermal expansion and contraction, which may lead to water seepage.

[0046] During the deformation process of the sealing gasket 6, the multiple pushing blocks 55 on its outer edge will also be subjected to extrusion force, and then the pushing block 55 can use the rotating shaft 56 to push the linkage rod 54 to start moving, so that the two linkage rods 54 are unfolded. During this process, the linkage rod 54 will also drive the moving rod 521 to slide inside the limiting groove 52. Since the moving rod 521 will only start to move due to the thrust of the linkage rod 54, the moving rod 521 will also squeeze the inner wall of the limiting groove 52 while moving inside the limiting groove 52, so that the friction between the moving rod 521 and the limiting groove 52 increases. Therefore, the existence of this friction force can increase the difficulty of unfolding the linkage rod 54.

[0047] When the pushing block 55 is subjected to force, it will not only drive the linkage rod 54 to move, but also transfer part of the force to the movable rod 532. Therefore, the movable rod 532 can start to slide relative to the movable sleeve 536 inside the movable sleeve 536. During this process, the pushing block 55 will start to squeeze the third spring 534. In the process of squeezing the third spring 534, the third spring 534 will convert part of the force into elastic potential energy for storage, and the other part of the force will be transferred to one of the limit plates 535. Therefore, the limit plate 535 will squeeze the second spring 533 while driving the movable sleeve 536 to move together. Therefore, when the movable sleeve 536 moves with the limit plate 535, it will start to slide relative to the mounting frame 531.

[0048] Then, the sealing gasket 6 and the connector 35 can be brought into closer contact by utilizing the elasticity of the second spring 533 and the third spring 534 and the reaction of the thrust assembly 53 .

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-seepage structure for underground mine drainage pipes, comprising a connecting sleeve (2) and two pipe bodies (3), wherein the surfaces of both ends of the connecting sleeve (2) are sleeved with a second protective sleeve (4), and one end of the second protective sleeve (4) is sleeved on the surface of the pipe body (3), characterized in that: The two pipe bodies (3) are fixedly connected to each other at one end thereof, a sealing groove (31) is provided between the two connecting heads (35), and a sealing gasket (6) is installed between the two connecting heads (35), and the sealing gasket (6) is clamped in the sealing groove (31). The outer edge of one end of the connecting head (35) is fixedly connected to a fixing rod (32), a clamping groove (33) is provided in the interior of the connecting sleeve (2), and a first spring (34) is sleeved on the surface of the fixing rod (32), one end of the first spring (34) is fixedly connected to the connecting head (35), and the other end of the first spring (34) is installed in the clamping groove (33), a receiving groove (21) is provided in the center of the inner cavity of the connecting sleeve (2), and a sealing mechanism (5) is provided in the interior of the receiving groove (21); The sealing mechanism (5) comprises an outer ring (51) and a push block (55), one end of the push block (55) abuts against the sealing gasket (6), a limiting groove (52) is provided on the inner edge of the outer ring (51), a moving rod (521) is slidably provided inside the limiting groove (52), two corners of the push block (55) are provided with mounting holes (551), a rotating shaft (56) is provided inside the mounting hole (551), two linkage rods (54) are provided on one side of the push block (55), one end of the linkage rod (54) is rotatably connected to the moving rod (521), and the other end of the linkage rod (54) is rotatably connected to the rotating shaft (56), and a thrust assembly (53) is provided between the two linkage rods (54); The thrust assembly (53) includes a mounting frame (531) and a movable sleeve (536), one end of the mounting frame (531) is fixedly connected to the outer ring (51), the movable sleeve (536) is slidably sleeved on one side of the mounting frame (531), both ends of the movable sleeve (536) are fixedly connected to a limiting plate (535), a movable rod (532) is provided on the inner side of the movable sleeve (536), one end of the movable rod (532) is fixedly connected to the push block (55), and the other end of the movable rod (532) passes through the movable sleeve (536); the outer diameter of the limiting plate (535) is larger than the outer diameter of the end of the mounting frame (531). The diameter of the movable rod (532) is smaller than the inner diameter of the limiting plate (535) and the movable sleeve (536); a second spring (533) is sleeved on the surface of one end of the movable sleeve (536); one end of the second spring (533) is fixedly connected to the mounting frame (531), and the other end of the second spring (533) is fixedly connected to one of the limiting plates (535); a third spring (534) is sleeved on the surface of the movable rod (532); one end of the third spring (534) is fixedly connected to the pushing block (55), and the other end of the third spring (534) is fixedly connected to one of the limiting plates (535).

2. The anti-seepage structure for underground mine drainage pipes according to claim 1, characterized in that: Two first protective sleeves (1) are sleeved on the surface of the connecting sleeve (2), and the outer walls of the two first protective sleeves (1) facing each other are fixedly connected with convex plates (12). A connecting screw is provided between the two convex plates (12), and nuts are sleeved on the surfaces of both ends of the connecting screw.

3. The anti-seepage structure for underground mine drainage pipes according to claim 2, characterized in that: The outer walls at both ends of the two first protective sleeves (1) are fixedly connected to arc-shaped plates (11), and one side of the arc-shaped plates (11) is fixedly connected to a plug-in rod (13).

4. The anti-seepage structure for underground mine drainage pipes according to claim 3, characterized in that: A fixing ring (41) is fixedly sleeved on the outer wall of the second protective sleeve (4), and a guide hole (411) is provided on the surface of the fixing ring (41).

5. The anti-seepage structure for underground mine drainage pipes according to claim 4, characterized in that: One end of the plug rod (13) is plugged into the guide hole (411), and a thread is provided on the outer surface of one end of the plug rod (13), and a nut is sleeved on the surface of one end of the plug rod (13).

6. The anti-seepage structure for underground mine drainage pipes according to claim 4, characterized in that: The inner diameter of one end of the second protective sleeve (4) is larger than the outer diameter of the pipe body (3), and the inner diameter of one end of the second protective sleeve (4) is smaller than the outer diameters of both ends of the connecting sleeve (2), and the inner diameter of the other end of the second protective sleeve (4) is larger than the outer diameter of the connecting sleeve (2).

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