Gas displacement device for coal mine

Abstract

The utility model belongs to the technical field of coal mining, and discloses a coal mine gas displacement device which comprises a bottom plate, the top end of the bottom plate is fixedly connected with a tank body, the top end of the tank body is provided with a guide-in pipe and an exhaust pipe, one end of the tank body is fixedly connected with a first conveying pipe, one end of the first conveying pipe is fixedly connected with a pressure pump, and the other end of the first conveying pipe is fixedly connected with a second conveying pipe. The pressure pump is fixedly connected with the bottom plate, one end of the pressure pump is fixedly connected with a second conveying pipe, and one end of the second conveying pipe is fixedly connected with a clamping assembly. Through the arrangement of the clamping assembly, when the male connector is inserted into the female connector, a clamping pipe is pushed to compress a reset spring, and a ball enters the female connector under extrusion of the male connector; after the male connector is in place, the reset spring pushes the clamping pipe to reset, the ball is clamped into the clamping groove of the male connector, quick connection is completed, the mounting and dismounting efficiency of the device is greatly improved through the connection mode, and the operation time is saved.

Description

Technical Field

[0001] This utility model belongs to the field of coal mining technology, specifically a coal mine displacement and gas replacement device. Background Technology

[0002] Coal, as one of my country's main energy sources, occupies an important position in the energy structure. However, coal mine gas disasters have always been a major threat to coal mine safety. Gas accidents not only cause casualties and property losses, but also seriously affect the safe and efficient production of mines. my country's coal seams have complex structures, soft coal quality, and low permeability, making it difficult to extract gas from original coal seams, which poses a huge challenge to gas control.

[0003] Meanwhile, the patent specification with application number CN114778738A discloses a coal mine underground gas purification device, "including a CH4 gas storage tank, a CO2 gas storage tank, an N2 gas storage tank, a vacuum pump, a coal sample holder, an axial pressure pump, a confining pressure pump, a CH4 concentration sensor, a CO2 concentration sensor, and a flow meter, etc.; the coal sample is located in the coal sample holder, the CH4 gas storage tank, CO2 gas storage tank, N2 gas storage tank, and vacuum pump are respectively connected to the coal sample holder and act on the coal sample, the axial pressure pump and the confining pressure pump are respectively used to apply axial and confining pressure loads to the coal sample; the CH4 concentration sensor, CO2 concentration sensor, and flow meter are respectively used to measure the concentration data and flow data when the mixed gas replaces and drives the CH4 gas."

[0004] Existing coal mine gas displacement and replacement devices are overly complicated in their installation and disassembly processes due to their complex connection structures, resulting in excessive time consumption and significantly impacting work efficiency. Furthermore, the poor sealing of the connection points makes them prone to leakage, affecting the effectiveness and safety of gas displacement and replacement.

[0005] Therefore, a coal mine gas displacement and replacement device is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a coal mine gas displacement and replacement device, which has the advantages of greatly improving the installation and dismantling efficiency of the device, saving operation time, and improving the effect and safety of gas displacement and replacement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a coal mine displacement and gas replacement device, comprising a base plate, a tank body fixedly connected to the top of the base plate, an inlet pipe and an exhaust pipe provided at the top of the tank body, a transmission pipe one fixedly connected to one end of the tank body, a pressure pump fixedly connected to one end of the transmission pipe one, the pressure pump being fixedly connected to the base plate, a transmission pipe two fixedly connected to one end of the pressure pump, and a snap-fit ​​assembly fixedly connected to one end of the transmission pipe two.

[0008] Preferably, control valves are installed on the outer surfaces of both the inlet pipe and the exhaust pipe.

[0009] Preferably, the snap-fit ​​assembly includes a male connector and a female connector. The male connector is fixedly connected to the second transmission pipe. One end of the female connector is fixedly connected to a drain pipe. A snap-fit ​​tube is slidably provided on the outer surface of the female connector. A return spring is provided on the inner surface of the snap-fit ​​tube. An annular groove is formed on the outer surface of the female connector. The return spring is fixedly connected to one inner wall of the annular groove. A fixing ring is fixedly connected to the inner surface of the snap-fit ​​tube. The fixing ring is fixedly connected to the other end of the return spring. Multiple spherical holes are formed at the contact point between the female connector and the fixing ring. Ball bearings are provided on the inner surface of each of the multiple spherical holes. A snap-fit ​​groove for cooperating with the ball bearings is formed on the outer surface of the male connector.

[0010] Preferably, the inner surface of the clamping tube is fixedly connected to two guide blocks, and the outer surface of the female connector is provided with a guide groove for use with the two guide blocks.

[0011] Preferably, the diameter of the spherical hole is designed to ensure that the ball can be partially exposed to engage with the male connector, while effectively preventing the ball from rolling out of the spherical hole.

[0012] Preferably, the male connector is threadedly connected to the second transmission pipe, and the female connector is threadedly connected to the drain pipe.

[0013] Preferably, a sealing ring is fixedly connected to the inner surface of the clamping tube, and sealing tape is provided at the threaded parts of both the male and female connectors.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting up a snap-fit ​​assembly, achieves rapid connection between the male and female connectors under the action of components such as the snap-fit ​​tube and the return spring. When the male connector is inserted into the female connector, it pushes the snap-fit ​​tube to compress the return spring, and the ball bearing enters the interior of the female connector under the pressure of the male connector. When the male connector is in place, the return spring pushes the snap-fit ​​tube to return to its original position, so that the ball bearing is snapped into the snap-fit ​​groove of the male connector, completing the rapid connection. This connection method greatly improves the installation and disassembly efficiency of the device and saves operation time.

[0016] 2. This utility model improves the sealing performance of the connection by setting a sealing ring inside the connecting pipe and setting sealing tape at the threads of the male and female connectors. Under the combined action of the sealing ring and sealing tape, the leakage of displacing media such as liquid carbon dioxide at the connection can be effectively reduced, thus improving the effect and safety of gas displacement and replacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the snap-fit ​​assembly structure of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the male connector structure of this utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the card tube of this utility model.

[0022] In the diagram: 1. Tank; 2. Transfer pipe 1; 3. Drain pipe;

[0023] 4. Snap-fit ​​assembly; 40. Female connector; 401. Guide groove; 402. Annular groove; 403. Spherical hole; 404. Ball bearing;

[0024] 41. Male connector; 411. Snap-fit ​​groove;

[0025] 42. Connecting tube; 421. Retaining ring; 422. Return spring; 423. Guide block; 424. Sealing ring;

[0026] 5. Transmission pipe 2; 6. Pressure pump; 7. Inlet pipe; 8. Exhaust pipe; 9. Control valve; 10. Base plate. Detailed Implementation

[0027] 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.

[0028] like Figures 1 to 5As shown, this utility model provides a coal mine gas displacement and replacement device, including a base plate 10, a tank 1 fixedly connected to the top of the base plate 10, the tank 1 being used to store liquid carbon dioxide to provide sufficient material basis for gas displacement and replacement, the top of the tank 1 being provided with an inlet pipe 7 and an exhaust pipe 8 to facilitate control of gas entry and exit, and to realize the adjustment of pressure and gas composition inside the tank 1, a transmission pipe 2 fixedly connected to one end of the tank 1, a pressurizing pump 6 fixedly connected to one end of the transmission pipe 2, and a conveying system consisting of pressurizing pump 6 and transmission pipe 2 5, which can deliver liquid carbon dioxide at a certain pressure to the required location, improving displacement efficiency, the pressurizing pump 6 being fixedly connected to the base plate 10, a transmission pipe 2 5 fixedly connected to one end of the pressurizing pump 6, and a snap-fit ​​component 4 fixedly connected to one end of the transmission pipe 2 5.

[0029] Specifically, control valves 9 are installed on the outer surfaces of both the inlet pipe 7 and the exhaust pipe 8. The valve on the outside of the inlet pipe 7 is used to introduce carbon dioxide, and the valve on the outside of the exhaust pipe 8 can adjust the pressure and gas composition inside the tank 1 according to actual needs, so as to make the displacement process safe and efficient.

[0030] like Figures 1 to 5 As shown, the snap-fit ​​assembly 4 includes a male connector 41 and a female connector 40. The male connector 41 is fixedly connected to the transmission pipe 5. One end of the female connector 40 is fixedly connected to a drain pipe 3. A snap-fit ​​tube 42 is slidably provided on the outer surface of the female connector 40. A return spring 422 is provided on the inner surface of the snap-fit ​​tube 42. An annular groove 402 is formed on the outer surface of the female connector 40. The return spring 422 is fixedly connected to one inner wall of the annular groove 402. A fixing ring 421 is fixedly connected to the inner surface of the snap-fit ​​tube 42. The fixing ring 421 is fixedly connected to the other end of the return spring 422. A joint is formed at the contact point between the female connector 40 and the fixing ring 421. There are multiple spherical holes 403, and the inner surface of each spherical hole 403 is provided with a ball 404. The outer surface of the male connector 41 is provided with a snap-fit ​​groove 411 for use with the ball 404. The design of the male connector 41 and the female connector 40 makes the connection more secure and reliable, and can withstand a certain amount of pressure and tension. The combination of the snap-fit ​​tube 42, the return spring 422, the retaining ring 421, the spherical holes 403 and the ball 404 realizes the function of quick connection and disassembly. When the male connector 41 is inserted into the female connector 40, the ball 404 forms a snap-fit ​​in the snap-fit ​​groove 411 to ensure the stability of the connection and prevent accidental disconnection.

[0031] Furthermore, the inner surface of the clamping pipe 42 is fixedly connected to two guide blocks 423, and the outer surface of the female connector 40 is provided with a guide groove 401 that works with the two guide blocks 423. When connecting the male connector 41 and the female connector 40, the guide groove plays a guiding role, making the connection more accurate and faster.

[0032] like Figures 1 to 5As shown, the diameter of the spherical hole 403 is designed to ensure that the ball 404 can be partially exposed to engage with the male connector 41, while effectively preventing the ball 404 from rolling out of the spherical hole 403. The partial exposure of the ball 404 and its engagement with the male connector 41 ensures that the connection between the male connector 41 and the female connector 40 will not easily loosen or break under various usage conditions.

[0033] It is worth noting that the male connector 41 is threadedly connected to the transmission pipe 2 5, and the female connector 40 is threadedly connected to the drain pipe 3. The threaded connection method is simple and reliable, and is easy to install and disassemble.

[0034] like Figures 1 to 5 As shown, a sealing ring 424 is fixedly connected to the inner surface of the clamping tube 42, and sealing tape is provided at the threaded parts of the male connector 41 and the female connector 40 to enhance the sealing of the connection and prevent carbon dioxide leakage.

[0035] The pressure pump 6 is existing technology and will not be described in detail. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail. The wiring diagram of the motor in this utility model is common knowledge in the field, and its working principle is already known technology. The appropriate model should be selected based on actual use; therefore, the control method and wiring layout of the motor will not be explained in detail.

[0036] Working principle and process: First, a certain amount of carbon dioxide is injected into tank 1 through inlet pipe 7. The exhaust pipe 8 and control valve 9 of tank 1 can discharge gas when necessary to regulate the pressure of tank 1. When gas displacement is required, liquid carbon dioxide exits from tank 1, passes through transmission pipe 1 2, and enters pressurization pump 6. Pressurization pump 6 pressurizes the liquid carbon dioxide, enabling it to be transmitted through transmission pipe 2 5 to the snap-fit ​​assembly 4. When connecting male connector 41 and female connector 40, male connector 41 is inserted into female connector 40. During insertion, the outer surface of male connector 41 presses against the ball bearing 404 in the spherical hole 403 on the outer surface of female connector 40, simultaneously pushing snap-fit ​​pipe 42 to overcome the elastic force of return spring 422 and slide outward. When male connector 41 is fully inserted into female connector 40, the ball bearing 404, under the squeezing action of fixing ring 421... The male connector 41 is inserted into the snap-fit ​​groove 411 on the outer surface of the female connector 40 through the spherical hole 403, thereby fixing the male connector 41 and the female connector 40. The two guide blocks 423 on the inner surface of the snap-fit ​​pipe 42 slide in the guide groove 401 on the outer surface of the female connector 40, which plays a guiding role and ensures the stability of the snap-fit ​​process. The male connector 41 is threaded to the transmission pipe 5, and the female connector 40 is threaded to the drain pipe 3, which ensures the stability of the connection. The sealing ring 424 on the inner surface of the snap-fit ​​pipe 42 and the sealing tape at the thread of the male connector 41 and the female connector 40 further improve the sealing performance of the connection. By adopting liquid carbon dioxide phase change fracturing permeability enhancement measures, the advance and lateral support pressure of the working face can be reduced, the stress environment of the roadway can be improved, the permeability of the coal seam can be enhanced, the deformation of the surrounding rock of the roadway can be controlled, and safe production can be ensured.

[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 embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal mine gas displacement device comprising a floor (10) characterised in that: The top end of the bottom plate (10) is fixedly connected with a tank body (1), the top end of the tank body (1) is provided with an import pipe (7) and an exhaust pipe (8), one end of the tank body (1) is fixedly connected with a transmission pipe one (2), one end of the transmission pipe one (2) is fixedly connected with a pressurizing pump (6), the pressurizing pump (6) is fixedly connected with the bottom plate (10), one end of the pressurizing pump (6) is fixedly connected with a transmission pipe two (5), one end of the transmission pipe two (5) is fixedly connected with a clamping assembly (4).

2. The coal mine displacement gas device according to claim 1, characterized in that: The outer surfaces of the import pipe (7) and the exhaust pipe (8) are both provided with control valves (9).

3. The coal mine displacement gas device according to claim 1, characterized in that: The clamping assembly (4) comprises a male connector (41) and a female connector (40), the male connector (41) is fixedly connected with the transmission pipe two (5), one end of the female connector (40) is fixedly connected with a liquid discharge pipe (3), the outer surface of the female connector (40) is slidably provided with a clamping pipe (42), the inner surface of the clamping pipe (42) is provided with a reset spring (422), the outer surface of the female connector (40) is provided with an annular groove (402), one side inner wall of the annular groove (402) is fixedly connected with the reset spring (422), the inner surface of the clamping pipe (42) is fixedly connected with a fixing ring (421), the other end of the reset spring (422) is fixedly connected with the fixing ring (421), a plurality of spherical holes (403) are arranged at the abutment position of the female connector (40) and the fixing ring (421), the inner surfaces of the plurality of spherical holes (403) are both provided with balls (404), the outer surface of the male connector (41) is provided with clamping grooves (411) matched with the balls (404).

4. The coal mine displacement gas device according to claim 3, characterized in that: The inner surface of the clamping pipe (42) is fixedly connected with two guide blocks (423), the outer surface of the female connector (40) is provided with guide grooves (401) matched with the two guide blocks (423).

5. The coal mine displacement gas device according to claim 3, characterized in that: The spherical hole (403) is designed to ensure that the ball (404) can partially protrude to cooperate with the male connector (41) while effectively preventing the ball (404) from rolling out of the spherical hole (403).

6. The coal mine displacement gas device according to claim 3, characterized in that: The male connector (41) and the transmission pipe two (5) are sleeved through threads, the female connector (40) and the liquid discharge pipe (3) are sleeved through threads.

7. The coal mine displacement gas device according to claim 6, characterized in that: The inner surface of the clamping pipe (42) is fixedly connected with a sealing ring (424), the threaded portions of the male connector (41) and the female connector (40) are both provided with sealing tapes.

Images