Coal bed gas negative pressure extraction equipment

Abstract

The invention relates to the technical field of coal bed gas extraction equipment, in particular to coal bed gas negative pressure extraction equipment. A second through pipe is fixedly installed at the top of a high-pressure water pump, and a first connecting cylinder is fixedly installed at the end, away from the high-pressure water pump, of the second through pipe; a first connecting disc, a first impact fan, a second impact fan and a first bevel gear are rotatably mounted on the side wall of the first connecting shaft, a third through pipe is fixedly mounted at the bottom of the first connecting cylinder, and a second through pipe is fixedly mounted at the bottom of the second connecting cylinder; a fourth through pipe is fixedly installed at the bottom of the first connecting cylinder, a fifth through pipe is fixedly installed at the top of the first connecting cylinder, the whole process from water flow driving to coalbed methane suction is smooth and efficient, continuous and stable extraction operation can be achieved, the requirement for rapid extraction of coalbed methane in coal mine production is met, safe production of a coal mine is guaranteed, and the production efficiency of the coal mine is improved. Meanwhile, the mining utilization rate of coal bed gas resources is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of coalbed methane extraction equipment, and in particular to coalbed methane negative pressure extraction equipment. Background Art

[0002] As an important unconventional natural gas resource, the effective extraction of coalbed methane (CBM) is crucial for safe coal mine production and comprehensive energy utilization. However, negative pressure extraction of CBM currently faces numerous challenges, and existing technologies have limitations.

[0003] Traditional negative pressure coalbed methane extraction relies on mechanical vacuum pumps to create a negative pressure environment. Mechanical vacuum pumps are complex structures composed of numerous precision components, including the pump body, rotor, and blades. These components are prone to failure due to wear and corrosion over long periods of operation, resulting in high maintenance costs. Furthermore, mechanical vacuum pumps have stringent requirements for their operating environment. The complex geological conditions and harsh operating environment of underground coal mines, such as high humidity and dust, can easily affect their performance and reduce extraction efficiency.

[0004] Furthermore, traditional extraction equipment consumes significant amounts of energy. Mechanical vacuum pumps consume significant amounts of electricity to maintain the complex internal structure and generate sufficient negative pressure. For large-scale coalbed methane extraction operations, the long-term cumulative energy costs are considerable, increasing production costs for coal mining companies and aligning with current energy conservation and environmental protection trends.

[0005] Furthermore, the extraction efficiency of traditional equipment is insufficient to meet the demands of coal mine production. With the expansion of coal mining scale and the increase in mining depth, the demand for coalbed methane extraction efficiency is becoming increasingly stringent. However, due to the limitations of its structure and operating principle, traditional extraction equipment is inadequate in rapidly establishing a stable negative pressure and maintaining continuous and efficient extraction. This inability to effectively and timely reduce the gas content in coal seams poses a potential threat to coal mine safety and production, while also affecting the extraction and utilization rate of coalbed methane resources. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a coalbed methane negative pressure extraction device, thereby solving the technical problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A specific structure of a coalbed methane negative pressure extraction device includes a water pool, wherein an extraction mechanism is fixedly installed on the side wall of the water pool, and the extraction mechanism includes a first through-tube, which is fixedly installed on the side wall of the water pool, a high-pressure water pump is fixedly installed on the end of the first through-tube away from the water pool, a second through-tube is fixedly installed on the top of the high-pressure water pump, a first connecting tube is fixedly installed on the end of the second through-tube away from the high-pressure water pump, a first connecting shaft is rotatably installed inside the first connecting tube, a first connecting plate is rotatably installed on the side wall of the first connecting shaft, a first impact fan is fixedly installed on the side wall of the first connecting shaft, a second impact fan is fixedly installed on the side wall of the first connecting shaft, a first bevel gear is fixedly installed on the side wall of the first connecting shaft, a third through-tube is fixedly installed on the bottom of the first connecting tube, a fourth through-tube is fixedly installed on the bottom of the first connecting tube, and a fifth through-tube is fixedly installed on the top of the first connecting tube.

[0009] In a possible implementation, the high-pressure water pump is fixedly mounted on a side wall of the pool, and the first connecting plate is fixedly mounted inside the first connecting cylinder.

[0010] In a possible implementation, a second bevel gear is meshedly mounted on a side wall of the first bevel gear, and a second connecting shaft is fixedly mounted inside the second bevel gear.

[0011] In a possible implementation, a synchronous belt transmission assembly is installed on the side wall of the second connecting shaft, a third connecting shaft is installed on one end of the synchronous belt transmission assembly away from the second connecting shaft, and a first convex disk is rotatably installed on the side wall of the third connecting shaft.

[0012] In a possible implementation, the side wall of the third connecting shaft is fixedly mounted with a first rotating fan, the side wall of the third connecting shaft is fixedly mounted with a second convex disk, and the side wall of the third connecting shaft is fixedly mounted with a second rotating fan.

[0013] In a possible implementation, the second rotating fan is located below the second convex disk, the second convex disk is located below the first rotating fan, the first rotating fan is located below the first convex disk, and the second connecting cylinder is rotatably mounted on the side wall of the third connecting shaft.

[0014] In a possible implementation, the first convex disc is fixedly mounted inside the second connecting cylinder, the second convex disc is rotatably mounted inside the second connecting cylinder, and a sixth through pipe is fixedly mounted on the top of the second connecting cylinder.

[0015] In a possible implementation, a first solenoid valve is fixedly mounted on the bottom of the second connecting cylinder, a wedge plate is fixedly mounted inside the water pool, and a top plate is fixedly mounted on the top of the water pool.

[0016] In one possible implementation, the second connecting shaft is rotatably mounted on the top of the top plate, the fourth through pipe is fixedly mounted inside the top plate, a second solenoid valve is fixedly mounted on the bottom of the pool, a base is fixedly mounted on the side wall of the second connecting tube, an eighth through pipe is fixedly mounted on the top of the top plate, and an end of the eighth through pipe away from the top plate is fixedly mounted to the second connecting tube.

[0017] In one possible implementation, the base is fixedly mounted on the side wall of the pool, a seventh through pipe is fixedly mounted on the top of the pool, a threaded plug is threadedly mounted inside the seventh through pipe, and an L-shaped fixing plate is fixedly mounted inside the second connecting tube.

[0018] Beneficial effects compared with existing technologies:

[0019] 1. In this solution, the coalbed methane negative pressure extraction equipment realizes efficient coalbed methane negative pressure extraction through a unique structural design. First, the high-pressure water pump draws water from the water pool and sprays it into the first connecting tube with a high-speed water flow. The impact force of the water flow drives the first impact fan and the connected first connecting shaft to rotate, while driving the second impact fan to rotate, expelling the air in the first connecting tube, quickly forming a relatively negative pressure environment. Based on the principle of air pressure difference, the coalbed methane is quickly sucked in through the fifth through pipe under the action of the external atmospheric pressure. Compared with the traditional extraction method, this method of using water flow to drive the formation of negative pressure does not require a complex mechanical vacuum pump structure, can quickly and efficiently establish negative pressure, and greatly improves the extraction efficiency of coalbed methane. Moreover, the various components of the equipment work closely together, and the entire process from water flow drive to coalbed methane suction is smooth and efficient, which can achieve continuous and stable extraction operations, meet the demand for rapid extraction of coalbed methane in coal mine production, help ensure coal mine safety production, and improve the mining and utilization rate of coalbed methane resources.

[0020] 2. In this solution, the equipment has multiple purification and cleaning functions, which can effectively ensure the purity of the extracted coalbed methane. On the one hand, the coalbed methane sucked into the first connecting tube is discharged into the water pool through the fourth through pipe. The water in the water pool performs an initial cleaning on it, and utilizes the solubility and adhesion of water and impurities in the coalbed methane to remove some solid impurities and water-soluble gases, thereby achieving preliminary purification. On the other hand, the coalbed methane entering the second connecting tube first impacts the side wall of the L-shaped fixed plate, causing a large amount of water vapor to fall and separate. Subsequently, the third connecting shaft drives the first rotating fan and the second convex disk to rotate, utilizing the principle of centrifugal force to further impact the water vapor inside the coalbed methane to the cylinder wall, accelerating the water vapor separation speed and enhancing the separation effect. Finally, when the coalbed methane passes through the first convex disk, its shape and possible low temperature environment are used to condense water vapor again. Through this series of multiple purification steps, the coalbed methane is treated from different angles, effectively removing water vapor and impurities therein, ensuring that the extracted coalbed methane meets high purity requirements, and providing a good quality foundation for the subsequent storage, transportation and utilization of the coalbed methane.

[0021] 3. In this solution, the equipment has significant advantages in energy conservation, environmental protection and maintenance, which helps to reduce the overall cost. In terms of energy conservation and environmental protection, the equipment discharges the excess water in the first connecting tube back to the water pool through the third through pipe, realizes water recycling, reduces the waste of water resources, and reduces dependence on external water sources. At the same time, the water flow is used to drive the impact fan and a series of mechanical transmissions to achieve coalbed methane extraction and purification. Compared with some extraction methods that rely on high-energy consumption equipment, the energy consumption is lower. In terms of maintenance convenience, the equipment structure is reasonably designed and the layout of each component is clear. For example, the wedge plate set in the water pool can make the precipitated impurities flow and gather along the slope, which is convenient for cleaning. Moreover, by opening the first solenoid valve and the second solenoid valve, the water and impurities accumulated in the water pool and the second connecting tube can be easily discharged together to complete the cleaning of the equipment and the renewal of water. This design reduces the workload and difficulty of equipment maintenance, reduces maintenance costs, and improves the operating stability and service life of the equipment. In the long run, it greatly reduces the overall cost of coalbed methane extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a structural schematic diagram of the second connecting tube of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the second convex disk of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the synchronous belt transmission assembly of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the first rotating fan of the present invention;

[0028] Figure 6 This is a schematic structural diagram of the first connecting tube of the present invention.

[0029] Legend: 11. Water tank; 12. First through-pipe; 13. High-pressure water pump; 14. Second through-pipe; 15. First connecting tube; 16. First connecting shaft; 17. First connecting disk; 18. First impact fan; 19. Second impact fan; 21. First bevel gear; 22. Third through-pipe; 23. Fourth through-pipe; 24. Fifth through-pipe; 25. Second bevel gear; 26. Second connecting shaft; 27. Synchronous belt drive assembly; 28. Third connecting shaft; 29. ​​First convex disk; 31. First rotating fan; 32. Second convex disk; 33. Second rotating fan; 34. Second connecting tube; 35. Sixth through-pipe; 36. First solenoid valve; 37. Wedge plate; 38. Top plate; 39. Second solenoid valve; 41. Base; 42. Seventh through-pipe; 43. Threaded plug; 44. L-shaped fixing plate; 45. Eighth through-pipe. DETAILED DESCRIPTION

[0030] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various forms, and therefore the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components that are not related to the present invention will be omitted from the drawings.

[0031] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0032] Example:

[0033] Please refer to Figure 1 and Figure 6 As shown, this embodiment introduces a specific structure of a coalbed methane negative pressure extraction device, including a water pool 11, counterclockwise rotation of the threaded plug 43, the threaded plug 43 will be screwed out of the seventh through pipe 42, water is poured into the water pool 11 from the seventh through pipe 42, the side wall of the water pool 11 is fixedly installed with a first through pipe 12, the high-pressure water pump 13 is started, and the high-pressure water pump 13 draws water from the inside of the water pool 11 into the first through pipe 12, the end of the first through pipe 12 away from the water pool 11 is fixedly installed with a high-pressure water pump 13, the high-pressure water pump 13 will pump the water out through the second through-pipe 14, and the water will spray into the first connecting cylinder 15. The second through-pipe 14 is fixedly installed on the top of the high-pressure water pump 13, and the first connecting cylinder 15 is fixedly installed on the end of the second through-pipe 14 away from the high-pressure water pump 13. The water will drive the first impact fan 18 to rotate clockwise. The high-pressure water pump 13 is fixedly installed on the side wall of the pool 11. The first connecting shaft 16 is rotatably installed inside the first connecting cylinder 15. The first impact fan 18 drives the first connecting shaft 16 to rotate clockwise.

[0034] The first connecting plate 17 is rotatably installed on the side wall of the first connecting shaft 16, and the first connecting plate 17 is fixedly installed inside the first connecting tube 15. The first impact fan 18 is fixedly installed on the side wall of the first connecting shaft 16. The first connecting shaft 16 drives the second impact fan 19 to rotate clockwise. The second impact fan 19 is fixedly installed on the side wall of the first connecting shaft 16. The second impact fan 19 discharges the air inside the first connecting tube 15 from the inside of the first connecting tube 15. At this time, the coalbed methane will be sucked into the first connecting tube 15 through the fifth through-pipe 24. The first bevel gear 21 is fixedly installed on the side wall of the first connecting shaft 16. The excess water will be discharged from the inside of the first connecting tube 15 through the third through-pipe 22, and the water will be discharged again through the first through-pipe 24. The tee pipe 22 is discharged back into the water pool 11. The third pipe 22 is fixedly installed at the bottom of the first connecting tube 15. The coalbed methane inside the first connecting tube 15 is discharged into the water pool 11 through the fourth pipe 23. The fourth pipe 23 is fixedly installed at the bottom of the first connecting tube 15. The water inside the water pool 11 will clean the coalbed methane. The cleaned coalbed methane will enter the second connecting tube 34 from the eighth pipe 45. The fifth pipe 24 is fixedly installed on the top of the first connecting tube 15. The first connecting shaft 16 drives the first bevel gear 21 to rotate clockwise. The second bevel gear 25 is meshed with the side wall of the first bevel gear 21. The first bevel gear 21 drives the second bevel gear 25 to rotate counterclockwise.

[0035] A second connecting shaft 26 is fixedly installed inside the second bevel gear 25. The second bevel gear 25 drives the second connecting shaft 26 to rotate counterclockwise. A synchronous belt transmission assembly 27 is installed on the side wall of the second connecting shaft 26. The second connecting shaft 26 drives the synchronous belt transmission assembly 27 to transmit counterclockwise. The third connecting shaft 28 is installed on one end of the synchronous belt transmission assembly 27 away from the second connecting shaft 26. The synchronous belt transmission assembly 27 drives the third connecting shaft 28 to rotate counterclockwise. A first convex disk 29 is rotatably installed on the side wall of the third connecting shaft 28. The third connecting shaft 28 drives the first rotating fan 31 to rotate counterclockwise. The first rotating fan 31 is fixedly installed on the side wall of the third connecting shaft 28. The coalbed methane inside the second connecting tube 34 is impacted by centrifugal force to push the water vapor inside the coalbed methane onto the inner wall of the second connecting tube 34. A second convex disk 32 is fixedly installed on the side wall of the third connecting shaft 28. The counterclockwise rotation of the second convex disk 32 will accelerate the separation of water vapor. A second rotating fan 33 is fixedly installed on the side wall of the third connecting shaft 28. The second rotating fan 33 is located below the second convex disk 32. The coalbed methane will be discharged from the interior of the second connecting tube 34 through the sixth through pipe 35. The second convex disk 32 is located below the first rotating fan 31. The first rotating fan 31 is located below the first convex disk 29. Finally, the coalbed methane passes through the first convex disk 29 to condense the water vapor inside the coalbed methane again.

[0036] The second connecting cylinder 34 is rotatably mounted on the side wall of the third connecting shaft 28. The precipitated impurities will flow along the inclined surface of the wedge plate 37. The first convex disc 29 is fixedly mounted inside the second connecting cylinder 34. The first solenoid valve 36 and the second solenoid valve 39 are opened to drain the water from the pool 11 and the second connecting cylinder 34. The second convex disc 32 is rotatably mounted inside the second connecting cylinder 34. The sixth through pipe 35 is fixedly mounted on the top of the second connecting cylinder 34. The first solenoid valve 36 is fixedly mounted on the bottom of the second connecting cylinder 34. A wedge plate 37 is fixedly mounted inside the pool 11. A top plate 38 is fixedly mounted on the top of the pool 11. The second connecting shaft 26 is rotatably mounted on the top of the top plate 38. The through pipe 23 is fixedly installed inside the top plate 38, a second solenoid valve 39 is fixedly installed at the bottom of the water pool 11, a base 41 is fixedly installed on the side wall of the second connecting tube 34, the base 41 is fixedly installed on the side wall of the water pool 11, a seventh through pipe 42 is fixedly installed on the top of the water pool 11, a threaded plug 43 is threadedly installed inside the seventh through pipe 42, an L-shaped fixing plate 44 is fixedly installed inside the second connecting tube 34, an eighth through pipe 45 is fixedly installed on the top of the top plate 38, and the end of the eighth through pipe 45 away from the top plate 38 is fixedly installed with the second connecting tube 34, and the coalbed methane inside the eighth through pipe 45 impacts the side wall of the L-shaped fixing plate 44, causing a large amount of water vapor to drop into the inside of the second connecting tube 34.

[0037] Working principle: First, the operator rotates the threaded plug 43 counterclockwise, and uses the spiral motion principle of the thread to gradually screw the threaded plug 43 out of the seventh through pipe 42, thereby opening the water injection channel. Then, water is poured into the water pool 11 from the seventh through pipe 42 to reserve water for subsequent extraction and cleaning processes. This step is the initial preparation for the operation of the entire equipment, ensuring that there is sufficient water in the water pool to realize coalbed methane extraction, cleaning and related power conversion;

[0038] The first through-pipe 12 on the side wall of the pool 11 is connected to the high-pressure water pump 13. After the high-pressure water pump 13 is started, according to the pumping principle of the water pump, the high-pressure water pump 13 draws the water in the pool 11 into the first through-pipe 12, and then discharges it through the second through-pipe 14 on the top. The high-speed sprayed water flows into the first connecting tube 15. The impact force of the water flow acts on the first impact fan 18. According to the action and reaction principle of force and the principle of lever, the first impact fan 18 rotates clockwise under the impact of the water flow. Since the first impact fan 18 is fixedly connected to the first connecting shaft 16, the first impact fan 18 rotates clockwise under the impact of the water flow. The first connecting shaft 16 is driven to rotate clockwise, and the second impact fan 19 on the side wall of the first connecting shaft 16 rotates clockwise along with the rotation of the first connecting shaft 16. The rotation of the second impact fan 19 causes the air inside the first connecting tube 15 to flow. According to the principles of fluid dynamics, the air is pushed out of the first connecting tube 15 by the fan blades, thereby forming a relatively negative pressure environment in the first connecting tube 15. At this time, according to the principle of pressure difference, the coalbed methane is sucked into the first connecting tube 15 through the fifth through-pipe 24 under the action of the external atmospheric pressure.

[0039] During the impact of water flow and the rotation of the fan blades, some excess water is discharged through the third through-pipe 22 at the bottom of the first connecting tube 15 and flows back into the water pool 11, thus realizing water recycling. At the same time, the coalbed methane absorbed into the first connecting tube 15 is discharged into the water pool 11 through the fourth through-pipe 23. The water in the water pool 11 performs a preliminary cleaning on the coalbed methane. By utilizing the interaction between water and impurities in the coalbed methane, such as solubility and adhesion, some solid impurities and water-soluble gases in the coalbed methane are removed, thus achieving a preliminary purification effect.

[0040] When the first connecting shaft 16 drives the impact fan to rotate, the first bevel gear 21 fixed on its side wall also rotates clockwise. The first bevel gear 21 and the second bevel gear 25 mesh with each other. According to the gear transmission principle, the rotation of the driving wheel (first bevel gear 21) drives the driven wheel (second bevel gear 25) to rotate counterclockwise, thereby causing the second connecting shaft 26 fixed inside the second bevel gear 25 to rotate counterclockwise. The second connecting shaft 26 transmits power to the third connecting shaft 28 through the synchronous belt transmission assembly 27. The synchronous belt transmission assembly 27 is composed of a synchronous belt, a pulley, etc. Based on the meshing friction between the synchronous belt and the pulley, the rotation of the second connecting shaft 26 drives the synchronous belt transmission assembly 27 to transmit counterclockwise, thereby causing the third connecting shaft 28 to rotate counterclockwise, providing power for the subsequent water vapor separation of coalbed methane in the second connecting cylinder 34;

[0041] The coalbed methane that has been initially cleaned by the water pool 11 enters the second connecting tube 34 from the eighth through-pipe 45 on the top of the top plate 38. The coalbed methane that has entered the second connecting tube 34 impacts the side wall of the L-shaped fixing plate 44. According to the collision principle, the water vapor in the coalbed methane is separated from the main gas body under the impact, and a large amount of water vapor falls into the second connecting tube 34. The rotation of the third connecting shaft 28 drives the first rotating fan 31 and the second convex disk 32 on its side wall to rotate counterclockwise. When the first rotating fan 31 rotates, the coalbed methane inside the second connecting tube 34 generates centrifugal motion according to the principle of centrifugal force, and the water vapor inside the coalbed methane is pushed into the second connecting tube 34. The second convex disc 32 further impacts the inner wall of the second connecting tube 34, and the counterclockwise rotation of the second convex disc 32 accelerates the speed at which water vapor separates from the coalbed methane. The airflow disturbance generated by its special shape and rotation enhances the separation effect of water vapor and coalbed methane. The coalbed methane that has undergone the above treatment is discharged from the interior of the second connecting tube 34 through the sixth through-pipe 35. During the discharge process, the coalbed methane will also pass through the first convex disc 29. The first convex disc 29 utilizes its shape and low-temperature environment (which may be formed by heat exchange with the external environment or internal cooling structure) to condense the water vapor remaining in the coalbed methane again, thereby further reducing the water content of the coalbed methane.

[0042] During the entire process, the precipitated impurities carried in the coalbed methane flow along the inclined surface of the wedge plate 37 in the water pool 11 under the action of gravity and gather at a specific position. When the equipment needs to be cleaned, the first solenoid valve 36 and the second solenoid valve 39 are opened. The first solenoid valve 36 controls the drainage at the bottom of the second connecting cylinder 34, and the second solenoid valve 39 controls the drainage at the bottom of the water pool 11, so that the water accumulated inside the water pool 11 and the second connecting cylinder 34 and the precipitated impurities are discharged together, completing the cleaning of the equipment and the renewal of water so that the equipment can carry out the next round of coalbed methane extraction. Through the above series of closely connected working steps and the application of physical principles, the equipment realizes the negative pressure extraction, cleaning and separation of water vapor and impurities of coalbed methane, ensuring that the extracted coalbed methane meets certain purity requirements.

[0043] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A coalbed methane negative pressure extraction device, comprising a water pool (11), characterized in that: A pumping mechanism is fixedly mounted on the side wall of the water pool (11), and the pumping mechanism comprises a first through pipe (12); The first through-tube (12) is fixedly mounted on the side wall of the pool (11); a high-pressure water pump (13) is fixedly mounted on the end of the first through-tube (12) away from the pool (11); a second through-tube (14) is fixedly mounted on the top of the high-pressure water pump (13); a first connecting tube (15) is fixedly mounted on the end of the second through-tube (14) away from the high-pressure water pump (13); a first connecting shaft (16) is rotatably mounted inside the first connecting tube (15); and a first connecting shaft (16) is rotatably mounted on the side wall of the first connecting shaft (16). A receiving plate (17), a first impact fan (18) is fixedly installed on the side wall of the first connecting shaft (16), a second impact fan (19) is fixedly installed on the side wall of the first connecting shaft (16), a first bevel gear (21) is fixedly installed on the side wall of the first connecting shaft (16), a third through-tube (22) is fixedly installed on the bottom of the first connecting tube (15), a fourth through-tube (23) is fixedly installed on the bottom of the first connecting tube (15), and a fifth through-tube (24) is fixedly installed on the top of the first connecting tube (15).

2. The coalbed methane negative pressure extraction equipment according to claim 1, characterized in that: The high-pressure water pump (13) is fixedly mounted on the side wall of the pool (11), and the first connecting plate (17) is fixedly mounted inside the first connecting cylinder (15).

3. The coalbed methane negative pressure extraction equipment according to claim 1, characterized in that: A second bevel gear (25) is meshedly mounted on the side wall of the first bevel gear (21), and a second connecting shaft (26) is fixedly mounted inside the second bevel gear (25).

4. The coalbed methane negative pressure extraction equipment according to claim 3, characterized in that: The side wall of the second connecting shaft (26) is driven and installed with a synchronous belt transmission assembly (27), and the end of the synchronous belt transmission assembly (27) away from the second connecting shaft (26) is driven and installed with a third connecting shaft (28), and the side wall of the third connecting shaft (28) is rotatably installed with a first convex disk (29).

5. The coalbed methane negative pressure extraction equipment according to claim 4, characterized in that: The side wall of the third connecting shaft (28) is fixedly mounted with a first rotating fan (31), the side wall of the third connecting shaft (28) is fixedly mounted with a second convex disk (32), and the side wall of the third connecting shaft (28) is fixedly mounted with a second rotating fan (33).

6. The coalbed methane negative pressure extraction equipment according to claim 5, characterized in that: The second rotating fan (33) is located below the second convex disk (32), the second convex disk (32) is located below the first rotating fan (31), the first rotating fan (31) is located below the first convex disk (29), and the side wall of the third connecting shaft (28) is rotatably mounted with a second connecting cylinder (34).

7. The coalbed methane negative pressure extraction equipment according to claim 6, characterized in that: The first convex disc (29) is fixedly mounted inside the second connecting cylinder (34), the second convex disc (32) is rotatably mounted inside the second connecting cylinder (34), a sixth through pipe (35) is fixedly mounted on the top of the second connecting cylinder (34), and a first solenoid valve (36) is fixedly mounted on the bottom of the second connecting cylinder (34).

8. The coalbed methane negative pressure extraction equipment according to claim 2, characterized in that: A wedge-shaped plate (37) is fixedly installed inside the water pool (11), and a top plate (38) is fixedly installed on the top of the water pool (11).

9. The coalbed methane negative pressure extraction equipment according to claim 5, characterized in that: The second connecting shaft (26) is rotatably mounted on the top of the top plate (38), the fourth through pipe (23) is fixedly mounted inside the top plate (38), a second solenoid valve (39) is fixedly mounted on the bottom of the water pool (11), an eighth through pipe (45) is fixedly mounted on the top of the top plate (38), and one end of the eighth through pipe (45) away from the top plate (38) is fixedly mounted on the second connecting tube (34).

10. The coalbed methane negative pressure extraction equipment according to claim 9, characterized in that: A base (41) is fixedly mounted on the side wall of the second connecting tube (34), and the base (41) is fixedly mounted on the side wall of the pool (11). A seventh through-tube (42) is fixedly mounted on the top of the pool (11), and a threaded plug (43) is threadedly mounted on the interior of the seventh through-tube (42). An L-shaped fixing plate (44) is fixedly mounted inside the second connecting tube (34).

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