Coal mine gas extraction hole sealing device

Abstract

The invention belongs to the technical field of gas extraction, and particularly discloses a coal mine gas extraction hole sealing device. An end plate is arranged at the end of the extraction pipeline, the peripheral wall of the end plate is in sealed connection with the peripheral wall of the extraction pipeline, a connecting hole is formed in the end plate, the coal mine gas extraction hole sealing device comprises a connecting joint, a first mounting plate, a driving assembly and a sealing plug, one end of the connecting joint is inserted into the connecting hole and is in sealed connection with the inner wall of the connecting hole, and the other end of the connecting joint is inserted into the first mounting plate. The connecting joint is provided with a channel connected with an extraction pipeline; the first mounting plate is arranged outside the extraction pipeline; the driving assembly is arranged on the first mounting plate, and the output end of the driving assembly penetrates through the end plate; the sealing plug is located in the extraction pipeline and connected to the output end of the driving assembly, and the driving assembly is used for driving the sealing plug to plug the channel or move out of the channel. According to the invention, the pipeline can be conveniently communicated or blocked, and gas leakage of the drill hole can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of gas extraction, and in particular relates to a coal mine gas extraction sealing device. Background Art

[0002] When extracting coal seam gas, after the extraction pipeline in the extraction borehole is installed, it is necessary to temporarily block the extraction pipeline to prevent a large amount of gas from seeping out, and then open the pipeline when connecting the pipeline. In the related technology, plugs are generally used to block the extraction pipeline. During gas extraction, the plugs need to be frequently removed. Frequent manual force can easily cause the extraction pipeline to be tilted due to uneven force, resulting in poor quality of drilling hole sealing and gas leakage. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a coal mine gas extraction sealing device, which can facilitate the connection or sealing of pipelines and is conducive to reducing borehole leakage.

[0004] The coal mine gas extraction and sealing device of the embodiment of the present invention is provided with an end plate at the end of the extraction pipe, the outer peripheral wall of the end plate is sealed and connected to the outer peripheral wall of the extraction pipe, and the end plate is provided with a connecting hole, and the coal mine gas extraction and sealing device comprises: a connecting joint, one end of which is inserted into the connecting hole and is sealed and connected to the inner wall of the connecting hole, and the connecting joint has a channel connected to the extraction pipe; a first mounting plate, the first mounting plate is arranged on the outside of the extraction pipe; a driving assembly, the driving assembly is arranged on the first mounting plate, and the output end of the driving assembly passes through the end plate; a sealing plug, the sealing plug is located inside the extraction pipe and connected to the output end of the driving assembly, and the driving assembly is used to drive the sealing plug to block the channel or move out of the channel.

[0005] In this embodiment, by providing an end plate at the end of the extraction pipe and providing a connecting hole on the end plate, the installation of the connecting joint can be facilitated, and the extraction pipe can be connected to the outside through the connecting joint. When gas extraction is not needed, the driving assembly drives the sealing plug to seal the channel of the connecting joint, so that the gas in the extraction pipe cannot flow out through the channel. When gas extraction is needed, the driving assembly drives the sealing plug to move out of the channel of the connecting joint, so that the connecting joint and the extraction pipe are connected, so that the extraction pipeline can extract gas from the borehole through the connecting joint, which is convenient for connecting or blocking the extraction pipe, and does not require manual removal, which is beneficial to ensuring the sealing effect of the extraction pipe and reducing gas leakage in the borehole. In addition, a first mounting plate is provided on the outside of the extraction pipe to facilitate the installation of the driving assembly.

[0006] In this embodiment, a mounting hole is provided in the middle of the first mounting plate, the connecting joint is a three-way joint, and one of the three joints of the connecting joint passes through the mounting hole.

[0007] In this embodiment, the sealing plug is a cone or a truncated cone.

[0008] In this embodiment, the driving assembly includes: a driving member, which is arranged on the first mounting plate; a guide rod, one end of which is connected to the output end of the driving member, the guide rod passes through the end plate and is connected to the sealing plug, and the guide rod is movable relative to the end plate.

[0009] In this embodiment, the driving assembly further comprises a second mounting plate, the second mounting plate is connected to an end of the guide rod facing away from the driving member, and the sealing plug is detachably connected to the second mounting plate via a connecting member.

[0010] In this embodiment, two guide rods are provided, and the two guide rods are symmetrically arranged relative to the sealing plug.

[0011] In this embodiment, the coal mine gas extraction and sealing device further includes a third mounting plate, wherein the third mounting plate is disposed at the output end of the driving member, and the guide rod is connected to the third mounting plate.

[0012] In this embodiment, the coal mine gas extraction and sealing device further includes a fixing component, which is connected to the driving component, and the fixing component is used to be inserted into the coal body when the driving component drives the sealing plug to seal the channel.

[0013] In this embodiment, the fixing assembly includes: a connecting rod, one end of which is connected to the driving assembly; a mounting seat, which is arranged on the outer wall of the extraction pipe; a plug-in component, which is rotatably connected to the mounting seat via a rotating shaft, and one end of the connecting rod facing away from the driving assembly is connected to the plug-in component, and the driving assembly drives the plug-in component to rotate around the rotating shaft via the connecting rod.

[0014] In this embodiment, the plug-in component includes: a pressure plate, which is rotatably connected to the mounting seat through the rotating shaft and is connected to the connecting rod; a cone rod, which is connected to the pressure plate, and when the pressure plate rotates around the rotating shaft toward the extraction pipe, the pressure plate drives the cone rod to be inserted into the coal body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereoscopic diagram of a coal mine gas extraction and sealing device according to an embodiment of the present invention.

[0016] Figure 2It is an exploded view of the coal mine gas extraction and sealing device according to an embodiment of the present invention after the extraction pipeline and the connecting joint are removed.

[0017] Figure 3 It is a cross-sectional view of an extraction pipeline and a connecting joint according to an embodiment of the present invention.

[0018] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0019] Reference numerals:

[0020] 1. Extraction pipeline; 2. Connecting joint; 3. First joint; 4. Second joint; 5. Driving assembly; 6. Fixing assembly; 7. Second mounting plate; 8. Fixing hole; 9. Connecting piece; 10. Mounting plate; 11. Sealing plug; 12. Connecting rod; 13. First mounting plate; 14. Driving piece; 15. Third mounting plate; 16. Guide rod; 17. Pressing plate; 18. Conical rod; 19. Scraper; 20. Mounting seat; 21. Mounting hole. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] In this embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, an end plate is provided at the end of the extraction pipe 1, and the outer peripheral wall of the end plate is sealed and connected to the outer peripheral wall of the extraction pipe 1, and a connecting hole is provided on the end plate. The coal mine gas extraction and sealing device includes a connecting joint 2, a first mounting plate 13, a driving component 5 and a sealing plug 11. One end of the connecting joint 2 is inserted into the connecting hole and is sealed and connected to the inner wall of the connecting hole. The connecting joint 2 has a channel connected to the extraction pipe 1; the first mounting plate 13 is arranged on the outside of the extraction pipe 1; the driving component 5 is arranged on the first mounting plate 13, and the output end of the driving component 5 passes through the end plate; the sealing plug 11 is located inside the extraction pipe 1 and is connected to the output end of the driving component 5, and the driving component 5 is used to drive the sealing plug 11 to block the channel or move it out of the channel.

[0023] Specifically, the extraction pipe 1 is installed in a borehole in the coal seam and the hole is sealed. When gas extraction is required, the extraction pipe 1 is connected to the extraction pipeline for gas extraction.

[0024] For example, the sealing plug 11 is a rubber sealing plug 11, which can be deformed by being squeezed and can better fit with the inner wall of the channel, which is beneficial to improving the sealing effect.

[0025] In this embodiment, by providing an end plate at the end of the extraction pipe 1 and providing a connecting hole on the end plate, the installation of the connecting joint 2 can be facilitated, and the extraction pipe 1 can be connected to the outside through the connecting joint 2. When gas extraction is not required, the sealing plug 11 is driven by the driving component 5 to block the channel of the connecting joint 2, so that the gas in the extraction pipe 1 cannot flow out through the channel. When gas extraction is required, the sealing plug 11 is driven by the driving component 5 to move out of the channel of the connecting joint 2, so that the connecting joint 2 and the extraction pipe 1 are connected, so that the extraction pipeline can extract gas from the borehole through the connecting joint 2, which is convenient for connecting or blocking the extraction pipe, and does not require manual removal, which is conducive to ensuring the sealing effect of the extraction pipe and reducing gas leakage in the borehole. In addition, a first mounting plate 13 is provided on the outside of the extraction pipe 1 to facilitate the installation of the driving component 5.

[0026] In this embodiment, if Figures 1 to 3 As shown, a mounting hole 21 is provided in the middle of the first mounting plate 13 , and the connecting joint 2 is a three-way joint, and one of the three joints of the connecting joint 2 passes through the mounting hole 21 .

[0027] Specifically, the first mounting plate 13 is fixed on the connecting joint 2. The fixing method of the first mounting plate 13 can be selected as needed and is not limited here. In addition, the remaining two joints of the connecting joint 2, namely the first joint 3 and the second joint 4, are symmetrically arranged relative to the joint connected to the end plate. The inner diameters of the first joint 3 and the second joint 4 can be set to different sizes, so that pipelines with different inner diameters can be connected, or one of the first joint 3 and the second joint 4 can be selected as needed for gas extraction, which expands the scope of application of the connecting joint 2.

[0028] It is understandable that the first mounting plate 13 is mounted on the outside of one of the three joints of the connecting joint 2 through the mounting hole 21 , so the first mounting plate 13 can be limited by the connecting joint 2 to facilitate the installation of the first mounting plate 13 .

[0029] In this embodiment, the sealing plug 11 is a cone or a truncated cone.

[0030] It is understandable that the sealing plug 11 is configured as a cone or a truncated cone, and when the sealing plug 11 moves into the channel of the connecting joint 2, the contact area between the sealing plug 11 and the channel wall will gradually increase, and a uniform extrusion pressure can be generated from the edge of the hole inward, thereby forming a more closed sealing effect. In addition, the cone or truncated cone can adapt to channels with different inner diameters, thereby expanding the application range of the sealing plug 11.

[0031] In this embodiment, if Figure 1 and Figure 2As shown, the driving assembly 5 includes a driving member 14 and a guide rod 16. The driving member 14 is arranged on the first mounting plate 13; one end of the guide rod 16 is connected to the output end of the driving member 14, the guide rod 16 passes through the end plate and is connected to the sealing plug 11, and the guide rod 16 is movable relative to the end plate.

[0032] For example, the driving member 14 can be an electric push rod, and the output end of the electric push rod can reciprocate, so that the driving member 14 can drive the guide rod 16 to reciprocate, and the reciprocating motion of the guide rod 16 drives the sealing plug 11 to reciprocate, thereby realizing the sealing plug 11 being inserted into the channel of the connecting joint 2 or removed from the channel of the connecting joint 2.

[0033] It is understandable that when the sealing plug 11 is needed to block the passage of the connecting joint 2, the driving member 14 drives the sealing plug 11 to move toward the connecting joint 2 by driving the guide rod 16 until the sealing plug 11 blocks the passage, and the guide rod 16 can guide the sealing plug 11, so that the sealing plug 11 can move stably, and then the sealing plug 11 can accurately block the passage, thereby improving the blocking effect. Similarly, when gas extraction is required, the driving member 14 can drive the sealing plug 11 to move out of the connecting joint 2 stably through the guide rod 16.

[0034] In this embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, the driving assembly 5 further includes a second mounting plate 7 , which is connected to one end of the guide rod 16 facing away from the driving member 14 , and the sealing plug 11 is detachably connected to the second mounting plate 7 via a connecting member 9 .

[0035] For example, the connecting member 9 may be a screw, and a threaded hole is provided on the sealing plug 11 . The screw may pass through the fixing hole 8 on the second mounting plate 7 and be threadedly connected to the sealing plug 11 .

[0036] like Figure 4 As shown, a connecting groove is provided on the second mounting plate 7, and the driving assembly 5 also includes a mounting disk 10, which is inserted into the connecting groove, and a sealing plug 11 is fixed on the mounting disk 10. By setting the connecting groove, the mounting disk 10 can be easily limited, thereby making the sealing plug 11 easier to install.

[0037] It is understandable that by providing the second mounting plate 7 to connect the guide rod 16 and the sealing plug 11, the installation of the sealing plug 11 can be facilitated. Since the sealing plug 11 will rub against the connecting joint 2 during use, after long-term use, the sealing plug 11 will be seriously worn, which is not conducive to ensuring the sealing effect of the sealing plug 11 on the channel. The sealing plug 11 is detachably connected to the second mounting plate 7, which can facilitate the replacement of the sealing plug 11 as needed to ensure the sealing effect of the channel of the connecting joint 2.

[0038] In this embodiment, if Figure 2 and Figure 4 As shown, two guide rods 16 are provided, and the two guide rods 16 are symmetrically arranged relative to the sealing plug 11 .

[0039] Specifically, the two guide rods 16 both pass through the first mounting plate 13 and are symmetrically arranged relative to the first mounting plate 13, which is beneficial for making the sealing plug 11 more evenly stressed, thereby facilitating the sealing plug 11 to be inserted into the channel of the connecting joint 2, thereby reducing the possibility that the sealing plug 11 is tilted due to the lateral force on the connecting joint 2, affecting the sealing effect between the connecting joint 2 and the end plate of the connecting pipe, and ensuring the sealing effect of the sealing plug 11.

[0040] In this embodiment, if Figure 2 The coal mine gas extraction and sealing device further comprises a third mounting plate 15 , which is arranged at the output end of the driving member 14 , and the guide rod 16 is connected to the third mounting plate 15 .

[0041] For example, two groups of driving members 14 can be provided, and the two groups of driving members 14 are symmetrically arranged relative to the first mounting plate 13. The third mounting plate 15 is connected to the output ends of the two driving members 14. When the sealing plug 11 needs to be moved, the two driving members 14 move synchronously, which is conducive to making the sealing plug 11 more evenly stressed.

[0042] It is understandable that the size of the third mounting plate 15 can be set according to installation requirements. Connecting the guide rod 16 to the output end of the driving member 14 through the third mounting plate 15 can facilitate the installation of the guide rod 16, and the third mounting plate 15 can be used to evenly apply force to the guide rod 16.

[0043] In this embodiment, if Figure 1 and Figure 4 As shown, the coal mine gas extraction and sealing device also includes a fixing component 6, which is connected to the driving component 5, and the fixing component 6 is used to be inserted into the coal body when the driving component 5 drives the sealing plug 11 to seal the channel.

[0044] It is understandable that when the sealing plug 11 blocks the passage, the fixing assembly 6 is inserted into the coal body, which can stably fix the connecting joint 2, thereby facilitating a better sealing effect between the sealing plug 11 and the connecting joint 2.

[0045] In this embodiment, if Figures 1 to 3 As shown, the fixing assembly 6 includes a connecting rod 12, a mounting seat 20 and a plug-in component, one end of the connecting rod 12 is connected to the driving assembly 5; the mounting seat 20 is arranged on the outer wall of the extraction pipeline 1; the plug-in component is rotatably connected to the mounting seat 20 through a rotating shaft, and the end of the connecting rod 12 away from the driving assembly 5 is connected to the plug-in component, and the driving assembly 5 drives the plug-in component to rotate around the rotating shaft through the connecting rod 12.

[0046] Specifically, Figure 1and Figure 2 As shown, one end of the connecting rod 12 is connected to the third mounting plate 15, and the connecting rod 12 can be L-shaped. One end of the connecting rod 12 adjacent to the mounting seat 20 is parallel to the axial direction of the connecting pipe. When the connecting rod 12 moves along the axial direction of the connecting pipe, it can drive the plug-in component to rotate.

[0047] It is understandable that while the driving assembly 5 drives the sealing plug 11 to be inserted into the pipe of the connecting joint 2, the connecting rod 12 can be used to drive the plug-in component to rotate around the rotating shaft, and the end of the plug-in component away from the mounting seat 20 moves toward the outer wall of the connecting pipe until it is inserted into the coal body.

[0048] In this embodiment, if Figure 2 As shown, the plug-in component includes a pressure plate 17 and a cone rod 18. The pressure plate 17 is rotatably connected to the mounting seat 20 via a rotating shaft and is connected to the connecting rod 12. The cone rod 18 is connected to the pressure plate 17. When the pressure plate 17 rotates around the rotating shaft toward the extraction pipeline 1, the pressure plate 17 drives the cone rod 18 to be inserted into the coal body.

[0049] Specifically, Figure 2 As shown, the plug-in component also includes a scraper 19, which is spaced apart from the cone rod 18 and is located on the side of the cone rod 18 away from the rotating shaft. When the cone rod 18 is inserted into the coal body, the scraper 19 is simultaneously inserted into the coal body near the cone rod 18, which can form a squeezing force on the coal body near the cone rod 18, which is beneficial to improve the fixing effect of the plug-in component. Further, one end of the scraper 19 away from the pressing plate 17 is set to a cone formed by removing material, so that the scraper 19 can be inserted into the coal body.

[0050] It can be understood that the plug-in component includes a pressure plate 17 and a cone rod 18. When the pressure plate 17 rotates around the rotating shaft, the cone rod 18 can be driven to rotate synchronously. When the cone rod 18 contacts the coal body, the cone rod 18 can be pushed into the coal body under the thrust of the pressure plate 17 to fix the plug-in component.

[0051] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A coal mine gas extraction sealing device, characterized in that: An end plate is provided at the end of the extraction pipeline, the outer peripheral wall of the end plate is sealed and connected to the outer peripheral wall of the extraction pipeline, and a connecting hole is provided on the end plate. The coal mine gas extraction sealing device includes: A connecting joint, one end of which is inserted into the connecting hole and sealed with the inner wall of the connecting hole, and the connecting joint has a channel connected to the extraction pipeline; A first mounting plate, the first mounting plate being arranged outside the extraction pipeline; A driving assembly, wherein the driving assembly is disposed on the first mounting plate, and an output end of the driving assembly passes through the end plate; A sealing plug is located inside the extraction pipeline and connected to the output end of the driving component, and the driving component is used to drive the sealing plug to block the channel or move out of the channel.

2. The coal mine gas extraction and sealing device according to claim 1, characterized in that: A mounting hole is provided in the middle of the first mounting plate, the connecting joint is a three-way joint, and one of the three joints of the connecting joint passes through the mounting hole.

3. The coal mine gas extraction sealing device according to claim 1, characterized in that: The sealing plug is a cone or a truncated cone.

4. The coal mine gas extraction sealing device according to claim 1, characterized in that: The drive assembly comprises: A driving member, wherein the driving member is disposed on the first mounting plate; A guide rod, one end of which is connected to the output end of the driving member, the guide rod passes through the end plate and is connected to the sealing plug, and the guide rod is movable relative to the end plate.

5. The coal mine gas extraction and sealing device according to claim 4, characterized in that: The driving assembly further comprises a second mounting plate, the second mounting plate being connected to an end of the guide rod facing away from the driving member, and the sealing plug being detachably connected to the second mounting plate via a connecting member.

6. The coal mine gas extraction and sealing device according to claim 5, characterized in that: Two guide rods are provided, and the two guide rods are symmetrically arranged relative to the sealing plug.

7. The coal mine gas extraction and sealing device according to claim 6, characterized in that: It also includes a third mounting plate, which is arranged at the output end of the driving member, and the guide rod is connected to the third mounting plate.

8. The coal mine gas extraction sealing device according to any one of claims 1 to 7, characterized in that: It also includes a fixing assembly, which is connected to the driving assembly and is used to be inserted into the coal body when the driving assembly drives the sealing plug to block the channel.

9. The coal mine gas extraction and sealing device according to claim 8, characterized in that: The fixing assembly comprises: A connecting rod, one end of which is connected to the driving assembly; A mounting seat, the mounting seat being arranged on the outer wall of the extraction pipeline; A plug-in component is rotatably connected to the mounting seat via a rotating shaft, and one end of the connecting rod away from the driving assembly is connected to the plug-in component, and the driving assembly drives the plug-in component to rotate around the rotating shaft via the connecting rod.

10. The coal mine gas extraction and sealing device according to claim 9, characterized in that: The plug-in component comprises: A pressing plate, the pressing plate is rotatably connected to the mounting seat through the rotating shaft and is connected to the connecting rod; A cone rod is connected to the pressure plate. When the pressure plate rotates around the rotating shaft toward the extraction pipe, the pressure plate drives the cone rod to be inserted into the coal body.

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