A coal mine gas extraction hole sealing device

Abstract

The utility model discloses a coal mine gas extraction hole sealing device, including gas extraction pipe, the outside lower end of gas extraction pipe is equipped with the protection hoop a and the protection hoop b, the outside of protection hoop a is equipped with high pressure gas bag, the inner wall of protection hoop a and protection hoop b is equipped with four positioning slots, and the angle between two adjacent positioning slots is 90 DEG, the outer wall of gas extraction pipe is assembled with four positioning columns, and the position of every positioning column and every positioning slot is one -to -one correspondence, and the positioning column is assembled in the positioning slot, the side wall of high pressure gas bag is equipped with the air hole, and the inside sealed splicing of air hole has the gas pipe, and the top of gas pipe is assembled with the gas nozzle, the setting of this coal mine gas extraction hole sealing device, when gas extraction pipe inserts into the sampling hole, seals the sampling hole, and then prevents the gas extraction pipe from colliding or rubbing with the extraction hole wall when the hole sealing device inserts the gas extraction pipe into the extraction hole, avoids the gas extraction pipe damage, and influences the service life.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for coal mine gas extraction holes, specifically a sealing device for coal mine gas extraction holes. Background Technology

[0002] Coal mine gas extraction is a necessary task during coal mining. Through gas extraction, not only can the amount of gas emitted during mining be reduced and gas explosions be prevented, but it can also be turned into a benefit by developing and utilizing it as a by-product of coal mining. The main method is to drill into the coal seam and the area where gas accumulates, pull the borehole to a dedicated pipeline, and use extraction equipment to extract the gas to the surface for utilization or discharge.

[0003] To prevent gas from escaping during the extraction process, which could lead to energy waste and safety hazards, sealing devices are needed to seal the gas extraction holes. However, with existing sealing devices, the gas extraction pipe is prone to collision or friction with the hole wall when inserted into the extraction hole, causing damage to the gas extraction pipe and reducing its service life. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing device for coal mine gas extraction holes, in order to prevent gas from escaping during the extraction process, which would cause energy waste and safety hazards, as mentioned in the background art. However, existing sealing devices cause gas extraction pipes to easily collide or rub against the extraction hole wall when the gas extraction pipe is inserted into the extraction hole, resulting in damage to the gas extraction pipe and a reduced service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for a coal mine gas extraction hole, wherein a protective hoop a and a protective hoop b are fitted on the lower outer end of the gas extraction pipe, a sponge layer is fitted on the outside of the protective hoop a, and a high-pressure airbag is fitted on the outer wall of the sponge layer.

[0006] The inner walls of the protective hoop a and the protective hoop b are provided with four positioning grooves, and the angle between two adjacent positioning grooves is 90°.

[0007] The outer wall of the gas extraction pipe is equipped with four positioning posts, and the position of each positioning post corresponds one-to-one with the position of each positioning slot. The positioning posts are installed in the positioning slots.

[0008] The high-pressure airbag has air holes on its side wall, and an air tube is sealed inside the air hole. An air nozzle is fitted at the top of the air tube, and the air tube and the air nozzle are connected by a sealing cylinder.

[0009] As a preferred embodiment of the sealing device for coal mine gas extraction holes according to this utility model, both ends of the openings of the protective hoop a and the protective hoop b are equipped with fastening plates. The side walls of the fastening plates are provided with fastening grooves, and screws are assembled inside the fastening grooves. Nuts are screwed onto the outside of the screws located on the outside of the fastening plates.

[0010] As a preferred embodiment of the coal mine gas extraction hole sealing device of this utility model, the positioning column has a filling cavity inside, and the filling cavity has an arched elastic element inside.

[0011] In a preferred embodiment of the coal mine gas extraction hole sealing device of this utility model, the interior of the arched elastic element is filled with an elastic pad.

[0012] As a preferred embodiment of the sealing device for coal mine gas extraction holes according to this utility model, an elastic gasket is installed at the outer bottom end of the gas extraction pipe.

[0013] In a preferred embodiment of the coal mine gas extraction hole sealing device of this utility model, the air pipe is inserted into the lower end of the sealing cylinder, the air nozzle is inserted into the upper end of the sealing cylinder, the outer wall of the air pipe is provided with external threads, and the inner wall of the sealing cylinder is provided with internal threads.

[0014] In a preferred embodiment of the coal mine gas extraction hole sealing device of this utility model, the end of the air nozzle is installed with a limit ring inside the sealing cylinder, the end of the air pipe is fitted with rubber pads a and b inside the sealing cylinder, and a rubber block is installed between rubber pads a and b.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the setting of the sealing device for coal mine gas extraction holes has a reasonable structural design;

[0016] This invention uses protective clamps a and b on the outside of the gas extraction pipe, and a positioning groove and a positioning post between the two clamps to limit and fix the gas extraction between the two clamps. A high-pressure airbag is installed outside the protective clamp a to seal the sampling hole when the gas extraction pipe is inserted into the sampling hole. This prevents the gas extraction pipe from colliding or rubbing against the hole wall when the sealing device is inserted into the extraction hole, thus avoiding damage to the gas extraction pipe and affecting its service life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the gas extraction pipe of this utility model;

[0019] Figure 3 This is a schematic diagram of the positioning post of this utility model;

[0020] Figure 4 This is a schematic diagram of the air tube, sealing cylinder, and air nozzle of this utility model.

[0021] In the diagram: 1. Gas extraction pipe; 2. Protective hoop b; 3. Protective hoop a; 4. Sponge layer; 5. High-pressure airbag; 6. Elastic gasket ring; 7. Air hole; 8. Air pipe; 9. Sealing cylinder; 10. Air nozzle; 11. Internal thread; 12. Positioning groove; 13. Positioning post; 14. Fastening plate; 15. Fastening groove; 16. Nut; 17. Screw; 18. Filling cavity; 19. Arched elastic element; 20. Elastic pad layer; 21. Limiting ring; 22. Rubber pad b; 23. Rubber block; 24. Rubber pad a. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] In this technical solution, a sealing device for a coal mine gas extraction hole includes a gas extraction pipe 1. A sponge layer 4 is fitted on the outside of the protective hoop a3, and a high-pressure airbag 5 is fitted on the outer wall of the sponge layer 4. Four positioning grooves 12 are opened on the inner walls of the protective hoop a3 and the protective hoop b2, and the angle between two adjacent positioning grooves 12 is 90°. Four positioning posts 13 are installed on the outer wall of the gas extraction pipe 1, and the position of each positioning post 13 corresponds one-to-one with each positioning groove 12. The positioning posts 13 are installed in the positioning grooves 12. An air hole 7 is opened on the side wall of the high-pressure airbag 5. An air pipe 8 is sealed and inserted into the air hole 7. An air nozzle 10 is installed at the top of the air pipe 8. The air pipe 8 and the air nozzle 10 are connected by a sealing cylinder 9.

[0025] In this technical solution, a gas extraction head is installed at the bottom of the gas extraction pipe 1. Gas extraction through-holes are evenly distributed on the gas extraction head. During gas extraction operations, gas enters the gas extraction pipe 1 through the gas extraction through-holes of the gas extraction head for sampling. Protective clamps a3 and b2 are fitted around the outside of the gas extraction pipe 1, and the three are tightly fitted together. A high-pressure airbag 5 is installed outside the protective clamp a3 through a sponge layer 4, so that when the gas extraction pipe 1 is placed inside the sampling hole, air is injected into the high-pressure airbag 5. This seals the sampling hole. The properties of the sponge layer 4 can seal the space between the protective hoop a3 and the high-pressure airbag 5. The protective hoop a3 and the protective hoop b2 have the same structure. The four positioning posts 13 are semi-cylindrical in shape and are integrally formed with the gas extraction pipe 1. The positioning posts 13 are installed in the positioning groove 12, thereby positioning the gas sampling pipe 1 between the two protective hoops to prevent the gas sampling pipe 1 from shaking. The air pipe 8 is inserted into the air hole 7 and connected to an external air pump through the air nozzle 10 to inflate the high-pressure airbag 5.

[0026] In some technical solutions, fastening plates 14 are installed at both ends of the openings of the protective clamps a3 and b2. The side wall of the fastening plate 14 is provided with a fastening groove 15. A screw 17 is installed inside the fastening groove 15, and a nut 16 is screwed onto the outside of the screw 17 located on the outside of the fastening plate 14.

[0027] In this technical solution, the opening can be fastened by the relative movement of the two fastening plates 14, and the two fastening plates 14 can be fastened by the threaded engagement of the screw 17 and the nut 16.

[0028] In some technical solutions, the positioning post 13 has a filling cavity 18 inside, and the filling cavity 18 has an arched elastic element 19 inside; the arched elastic element 19 is filled with an elastic pad 20.

[0029] In this technical solution, the elastic support force of the positioning column 13 can be improved by using the arched elastic element 19 and the elastic pad 20.

[0030] In some technical solutions, an elastic gasket 6 is installed at the outer bottom end of the gas extraction pipe 1.

[0031] In this technical solution, the bottom outer wall of the gas extraction pipe 1 can be protected by the elastic gasket ring 6.

[0032] In some technical solutions, the air tube 8 is inserted into the lower end of the sealing cylinder 9, the air nozzle 10 is inserted into the upper end of the sealing cylinder 9, the outer wall of the air tube 8 is provided with external threads 25, and the inner wall of the sealing cylinder 9 is provided with internal threads 11.

[0033] In this technical solution, the air tube 8 and the air nozzle 10 are connected by a sealing cylinder 9. The air tube 8 is installed into the sealing cylinder 9 by means of a threaded connection.

[0034] In some technical solutions, the end of the air nozzle 10 is installed inside the sealing cylinder 9 with a limiting ring 21, and the end of the air pipe 8 is fitted with rubber pads a24 and b22 inside the sealing cylinder 9, with a rubber block 23 installed between rubber pads a24 and b22.

[0035] In this technical solution, the end of the air nozzle 10 is fitted with a sealing cylinder 9 on the outer wall of the air nozzle 10 by a limiting ring 21, and the outer wall of the air nozzle 10 is tightly fitted with the opening of the sealing cylinder 9. After the air tube 8 is installed into the sealing cylinder 9, the rubber gasket a24 and the rubber gasket b22 are fitted on the outside of the air tube 8 to seal it.

[0036] Working principle: In use, first, put the protective hoop a3 and protective hoop b2 on the outside of the gas extraction pipe 1, and assemble the positioning column 13 and positioning groove 12. Then, put the high-pressure airbag 5 on the outside of the protective hoop a3. Then, place the gas extraction pipe 1 and the high-pressure airbag 5 into the sampling hole. Then, connect the air nozzle 10 to the air pipe 8 through the sealing cylinder 9, connect the air nozzle 10 to the external air pump, inflate the high-pressure airbag 5, seal the sampling hole, and start sampling.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealing device for a coal mine gas extraction hole, comprising a gas extraction pipe (1), characterized in that, The lower outer end of the gas extraction pipe (1) is fitted with a protective hoop a (3) and a protective hoop b (2). The outer side of the protective hoop a (3) is fitted with a sponge layer (4), and the outer wall of the sponge layer (4) is fitted with a high-pressure airbag (5). The inner walls of the protective hoop a (3) and the protective hoop b (2) are provided with four positioning grooves (12), and the angle between two adjacent positioning grooves (12) is 90°; The outer wall of the gas extraction pipe (1) is equipped with four positioning posts (13), and the positions of each positioning post (13) and each positioning groove (12) correspond one-to-one. The positioning posts (13) are installed in the positioning grooves (12). The high-pressure airbag (5) has an air hole (7) on its side wall. An air tube (8) is sealed inside the air hole (7). An air nozzle (10) is fitted at the top of the air tube (8). The air tube (8) and the air nozzle (10) are connected by a sealing cylinder (9). The air tube (8) is inserted into the lower end of the sealing cylinder (9). The air nozzle (10) is inserted into the upper end of the sealing cylinder (9). The outer wall of the air tube (8) is provided with an external thread (25). The inner wall of the sealing cylinder (9) is provided with an internal thread (11). The end of the air nozzle (10) is located inside the sealing cylinder (9) and a limit ring (21) is installed. The end of the air tube (8) is located inside the sealing cylinder (9) and rubber pads a (24) and b (22) are fitted inside the sealing cylinder (9). A rubber block (23) is installed between the rubber pads a (24) and b (22).

2. The sealing device for coal mine gas extraction holes according to claim 1, characterized in that, Both ends of the openings of the protective hoop a (3) and the protective hoop b (2) are equipped with fastening plates (14). The side wall of the fastening plate (14) is provided with a fastening groove (15). A screw (17) is assembled inside the fastening groove (15). A nut (16) is screwed onto the outside of the screw (17) on the outside of the fastening plate (14).

3. The sealing device for coal mine gas extraction holes according to claim 1, characterized in that, The positioning post (13) has a filling cavity (18) inside, and the filling cavity (18) has an arched elastic element (19) inside.

4. A sealing device for coal mine gas extraction holes according to claim 3, characterized in that, The interior of the arched elastic element (19) is filled with an elastic pad (20).

5. A sealing device for coal mine gas extraction holes according to claim 1, characterized in that, An elastic gasket (6) is installed at the bottom of the outer side of the gas extraction pipe (1).

Images