Compression extraction device for coal bed gas development

Abstract

The utility model belongs to the technical field of compression and extraction devices, and particularly relates to a compression and extraction device for coal bed gas development, which comprises an extraction tank, a pressure relief cylinder is fixedly sleeved on the side wall of the extraction tank, a pressure relief mechanism is arranged in the pressure relief cylinder, an air outlet pipe is fixedly sleeved in the extraction tank, a one-way valve is arranged on the air outlet pipe, and the one-way valve is arranged on the one-way valve. An air inlet pipe is fixedly connected in the extraction tank in a sleeving manner, a butterfly valve is arranged in the air inlet pipe, and a filtering mechanism is arranged in the air inlet pipe. Dust in gas is filtered through the filter screen, the dust is prevented from entering the extraction tank, meanwhile, the fan blades are driven by airflow to rotate, then the supporting shaft drives the scraper to rotate to rub the filter screen, the dust on the filter screen is convenient to clean, and the filter screen is prevented from being blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of compression extraction devices, and in particular relates to a compression extraction device for coal bed gas development. Background Art

[0002] The utility model patent with the patent authorization announcement number CN209857512U discloses a compression extraction device for coalbed methane development, including an extraction tank and a gas flow meter, an insulating terminal is arranged on the top of the extraction tank, an operation panel is arranged on one side wall of the extraction tank, a barometer is arranged directly below the operation panel, an air intake pipe is arranged on one side of the extraction tank, an air intake butterfly valve is arranged on the top of the air intake pipe, and an insulation layer is arranged in the inner wall of the air intake pipe. The beneficial effect is that the utility model can reduce the number of compressors used by adding a motor, a piston column and a liquefied tank, while increasing the amount of coalbed methane compressed in a single time, saving energy consumption and improving work efficiency. By setting a buffer tank, the mined coalbed methane can be pre-stored so that the compression equipment can work without stopping during compression and extraction. However, when the device is in use, there is dust in the gas entering the device, and accumulation in the device will cause damage to the device. At the same time, when the air pressure in the extraction tank is too high, it will cause safety hazards. Summary of the invention

[0003] The purpose of the utility model is to provide a compression extraction device for coalbed methane development, which solves the problem that dust exists in the gas entering the existing compression extraction device for coalbed methane development, and accumulation in the device may cause damage to the device, and safety hazards may occur when the gas pressure in the extraction tank is too high.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a compression extraction device for coalbed methane development, including an extraction tank, a pressure relief cylinder is fixedly sleeved on the side wall of the extraction tank, a pressure relief mechanism is arranged inside the pressure relief cylinder, an air outlet pipe is fixedly sleeved inside the extraction tank, a one-way valve is arranged on the air outlet pipe, an air inlet pipe is fixedly sleeved inside the extraction tank, a butterfly valve is arranged inside the air inlet pipe, and a filtering mechanism is arranged inside the air inlet pipe.

[0005] The principle of the utility model is that when in use, gas enters the extraction tank through the air inlet pipe, and the dust in the gas is filtered through the filter to prevent the dust from entering the extraction tank. At the same time, the fan blades are driven to rotate by the airflow, and the fan blades drive the support shaft to rotate, and then the support shaft drives the scraper to rotate, so that the scraper slides on the surface of the filter, so that the scraper scratches the filter. At the same time, the fan blades hit the spring pieces, so that the fan blades drive the support shaft to move left, and then the filter vibrates, making it easier to clean the dust on the filter and preventing the filter from being blocked. When the air pressure in the extraction tank is too high, the fan blades will move forward and backward, and the dust on the filter will be easily cleaned. When the pressure is too high, the air pressure will lift the plug, causing the plug and the pressure relief cylinder to separate, allowing the gas to be discharged from the ventilation hole. When the air pressure in the extraction tank is controlled, the screw cover is manually turned, and the screw cover rotates and makes a threaded motion with the pressure relief cylinder, thereby causing the screw cover to move into the pressure relief cylinder to squeeze the spring, causing the spring preload force to change. By rotating the screw cover and the pressure relief cylinder to make a threaded motion, the spring acts on the plug, and the plug is elastically pressed in the pressure relief cylinder. When the air pressure in the extraction tank is too high, part of the gas can be automatically discharged, thereby improving the safety of the extraction tank.

[0006] The beneficial effect of the utility model is that by rotating the screw cover and the pressure relief cylinder to make a threaded movement, the spring acts on the plug, and the plug is elastically pressed in the pressure relief cylinder, so that when the air pressure in the extraction tank is too high, part of the gas can be automatically discharged, thereby improving the safety of the extraction tank.

[0007] The dust in the gas is filtered through the filter to prevent the dust from entering the extraction tank. At the same time, the fan blades are driven to rotate by the airflow, and then the support shaft drives the scraper to rotate and scrape the filter, making it easy to clean the dust on the filter and preventing the filter from being blocked.

[0008] Furthermore, the pressure relief mechanism includes a ventilation hole, a plug, a screw cover, a guide rod, a spring, and a handle. The wall of the pressure relief cylinder is provided with a ventilation hole. The inside of the pressure relief cylinder is slidably connected with a plug. The inside of the pressure relief cylinder is threadedly connected with a screw cover. A guide rod is welded to the right end of the screw cover. The guide rod and the plug are slidably connected. A spring is arranged on the outside of the guide rod. By rotating the screw cover and the pressure relief cylinder to make a threaded movement, the spring acts on the plug, and the plug is elastically pressed in the pressure relief cylinder. When the air pressure in the extraction tank is too high, part of the gas can be automatically discharged, thereby improving the safety of the extraction tank.

[0009] Furthermore, one end of the spring is fixedly connected to the nut, and the other end of the spring is fixedly connected to the plug. By providing the spring, the plug can be elastically reset.

[0010] Furthermore, a handle is welded on the left end of the screw cap, and the handle is made of metal. By providing the handle, the screw cap is easy to rotate.

[0011] Furthermore, the filtering mechanism includes a slide cylinder, a guide block, a slide rod, a compression spring, a filter screen, a support shaft, a scraper, a fan blade, a support ring, and a spring piece. The inside of the air intake pipe is slidably connected with a slide cylinder, the outside of the slide cylinder is welded with a guide block, the guide block is slidably connected to the air intake pipe, the inside of the guide block is slidably connected with a slide rod, the slide rod is fixedly connected to the air intake pipe, a compression spring is arranged on the outside of the slide rod, the inside of the slide cylinder is fixedly connected with a filter screen, the inside of the filter screen is installed with a support shaft through a sealed bearing, the outside of the left end of the support shaft is fixedly connected with a scraper, the scraper is in contact with the filter screen, and the outside of the right end of the support shaft is arranged with a fan blade. The dust in the gas is filtered through the filter screen to prevent the dust from entering the extraction tank. At the same time, the fan blade is driven to rotate by the airflow, so that the support shaft drives the scraper blade to rotate and scratch the filter screen, so that the dust on the filter screen is easy to clean and the filter screen is prevented from being blocked.

[0012] Furthermore, one end of the compression spring is fixedly connected to the guide block, and the other end of the compression spring is fixedly connected to the air intake pipe. By providing the compression spring, the guide block is easy to reset.

[0013] Furthermore, a support ring is fixedly sleeved inside the air inlet pipe, a spring sheet is welded on the left end of the support ring, and the spring sheet is in contact with the fan blade. By providing the spring sheet, the filter screen is easy to vibrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the overall structure of a compression extraction device for coalbed methane development according to an embodiment of the present invention;

[0015] Figure 2 Compression extraction device for coal bed methane development according to the embodiment of the present invention Figure 1 A front view of

[0016] Figure 3 Compression extraction device for coal bed methane development according to the embodiment of the present invention Figure 2 A cross-sectional view of the pressure relief cylinder;

[0017] Figure 4 Compression extraction device for coal bed methane development according to the embodiment of the present invention Figure 2 A partial cross-sectional view of the intake pipe;

[0018] Figure 5 Compression extraction device for coal bed methane development according to the embodiment of the present invention Figure 4 Enlarged view of point A in . DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The figure marks in the drawings of the specification include: extraction tank 1, pressure relief cylinder 2, pressure relief mechanism 3, air outlet pipe 4, one-way valve 5, air inlet pipe 6, butterfly valve 7, filter mechanism 8, ventilation hole 31, plug 32, screw cover 33, guide rod 34, spring 35, handle 36, slide cylinder 81, guide block 82, slide rod 83, compression spring 84, filter screen 85, support shaft 86, scraper 87, fan blade 88, support ring 89, spring piece 810.

[0021] like Figure 1 , Figure 2 , Figure 4 As shown, this embodiment provides a compression extraction device for coalbed methane development, including an extraction tank 1, a pressure relief cylinder 2 is fixedly sleeved on the side wall of the extraction tank 1, a pressure relief mechanism 3 is arranged inside the pressure relief cylinder 2, an air outlet pipe 4 is fixedly sleeved inside the extraction tank 1, a one-way valve 5 is arranged on the air outlet pipe 4, an air inlet pipe 6 is fixedly sleeved inside the extraction tank 1, a butterfly valve 7 is arranged inside the air inlet pipe 6, and a filtering mechanism 8 is arranged inside the air inlet pipe 6.

[0022] like Figure 2 , Figure 3 As shown, the pressure relief mechanism 3 includes a ventilation hole 31, a plug 32, a screw cover 33, a guide rod 34, a spring 35, and a handle 36. The wall of the pressure relief cylinder 2 is provided with a ventilation hole 31, the plug 32 is slidably connected to the inside of the pressure relief cylinder 2, the screw cover 33 is threadedly connected to the inside of the pressure relief cylinder 2, the guide rod 34 is welded to the right end of the screw cover 33, the guide rod 34 and the plug 32 are slidably connected, a spring 35 is arranged on the outside of the guide rod 34, one end of the spring 35 is fixedly connected to the screw cover 33, and the other end of the spring 35 is fixedly connected to the plug 3 2 is fixedly connected, and the plug 32 can be elastically reset by setting a spring 35. A handle 36 is welded on the left end of the screw cover 33. The handle 36 is made of metal. The screw cover 33 is easy to rotate by setting the handle 36. The screw cover 33 and the pressure relief cylinder 2 are rotated to make a threaded movement, so that the spring 35 acts on the plug 32, and the plug 32 is elastically pressed in the pressure relief cylinder 2. When the air pressure in the extraction tank 1 is too high, part of the gas can be automatically discharged, thereby improving the safety of the extraction tank 1.

[0023] like Figure 4 , Figure 5As shown, the filtering mechanism 8 includes a slide cylinder 81, a guide block 82, a slide rod 83, a compression spring 84, a filter screen 85, a support shaft 86, a scraper 87, a fan blade 88, a support ring 89, and a spring 810. The interior of the air intake pipe 6 is slidably connected with the slide cylinder 81, and the outer side of the slide cylinder 81 is welded with a guide block 82. The guide block 82 and the air intake pipe 6 are slidably connected. The interior of the guide block 82 is slidably connected with the slide rod 83, and the slide rod 83 and the air intake pipe 6 are fixedly connected. A compression spring 84 is arranged on the outer side of the slide rod 83, and one end of the compression spring 84 is fixedly connected to the guide block 82, and the other end of the compression spring 84 is fixedly connected to the air intake pipe 6. By arranging the compression spring 84, the guide block 82 is easy to reset. The interior of the slide cylinder 81 is fixedly connected with the filter screen 85, and the filter screen 85 A support shaft 86 is installed inside through a sealed bearing, a scraper 87 is fixedly connected to the outer side of the left end of the support shaft 86, and the scraper 87 is in contact with the filter 85. A fan blade 88 is arranged on the outer side of the right end of the support shaft 86, and a support ring 89 is fixedly sleeved inside the air inlet pipe 6. A spring piece 810 is welded to the left end of the support ring 89, and the spring piece 810 is in contact with the fan blade 88. By arranging the spring piece 810, the filter 85 is easy to vibrate, and the dust in the gas is filtered through the filter 85 to prevent the dust from entering the extraction tank 1. At the same time, the fan blade 88 is driven to rotate by the airflow, so that the support shaft 86 drives the scraper 87 to rotate and scratch the filter 85, so that the dust on the filter 85 is easy to clean and the filter 85 is prevented from being blocked.

[0024] The specific implementation process of the utility model is as follows: when in use, gas enters the extraction tank 1 through the air inlet pipe 6, and the dust in the gas is filtered through the filter 85 to prevent the dust from entering the extraction tank 1. At the same time, the fan blade 88 is driven to rotate by the airflow, and the fan blade 88 drives the support shaft 86 to rotate, and then the support shaft 86 drives the scraper 87 to rotate, so that the scraper 87 slides on the surface of the filter 85, so that the scraper 87 scratches the filter 85. At the same time, the fan blade 88 hits the spring piece 810, so that the fan blade 88 drives the support shaft 86 to move to the left, and then the filter 85 vibrates, so that the dust on the filter 85 is easy to clean, and the filter 85 is prevented from being blocked. When the extraction tank 1 is When the air pressure is too high, the air pressure pushes up the plug 32, so that the plug 32 and the pressure relief cylinder 2 are separated, and the gas is discharged from the ventilation hole 31. When the air pressure in the extraction tank 1 is controlled, the screw cover 33 is manually rotated, and the screw cover 33 rotates and makes a threaded motion with the pressure relief cylinder 2, so that the screw cover 33 moves into the pressure relief cylinder 2 to squeeze the spring 35, so that the preload force of the spring 35 changes. By rotating the screw cover 33 and the pressure relief cylinder 2 to make a threaded motion, the spring 35 acts on the plug 32, and the plug 32 is elastically pressed in the pressure relief cylinder 2, so that when the air pressure in the extraction tank 1 is too high, part of the gas can be automatically discharged, thereby improving the safety of the extraction tank 1;

[0025] By rotating the screw cap 33 and the pressure relief cylinder 2 to make a threaded motion, the spring 35 acts on the plug 32, so that the plug 32 is elastically pressed in the pressure relief cylinder 2, so that when the air pressure in the extraction tank 1 is too high, part of the gas can be automatically discharged, thereby improving the safety of the extraction tank 1;

[0026] The dust in the gas is filtered through the filter 85 to prevent the dust from entering the extraction tank 1. At the same time, the fan blade 88 is driven to rotate by the airflow, and then the support shaft 86 drives the scraper 87 to rotate and scrape the filter 85, making it easy to clean the dust on the filter 85 and preventing the filter 85 from being blocked.

[0027] It should be noted in advance that, 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 connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A compression extraction device for coalbed methane development, comprising an extraction tank, characterized in that: A pressure relief cylinder is fixedly sleeved on the side wall of the extraction tank, a pressure relief mechanism is arranged inside the pressure relief cylinder, an air outlet pipe is fixedly sleeved inside the extraction tank, a one-way valve is arranged on the air outlet pipe, an air inlet pipe is fixedly sleeved inside the extraction tank, a butterfly valve is arranged inside the air inlet pipe, and a filtering mechanism is arranged inside the air inlet pipe.

2. The compression and extraction device for coalbed methane development according to claim 1, characterized in that: The pressure relief mechanism includes a ventilation hole, a plug, a screw cover, a guide rod, a spring, and a handle. The wall of the pressure relief cylinder is provided with a ventilation hole. The interior of the pressure relief cylinder is slidably connected with a plug. The interior of the pressure relief cylinder is threadedly connected with a screw cover. A guide rod is welded to the right end of the screw cover. The guide rod and the plug are slidably connected. A spring is arranged on the outside of the guide rod.

3. The compression and extraction device for coalbed methane development according to claim 2, characterized in that: One end of the spring is fixedly connected to the screw cap, and the other end of the spring is fixedly connected to the plug.

4. The compression and extraction device for coalbed methane development according to claim 2, characterized in that: A handle is welded to the left end of the screw cover, and the handle is made of metal.

5. The compression and extraction device for coalbed methane development according to claim 1, characterized in that: The filtering mechanism includes a slide cylinder, a guide block, a slide rod, a compression spring, a filter screen, a support shaft, a scraper, a fan blade, a support ring, and a spring sheet. The air intake pipe is slidably connected to the slide cylinder, a guide block is welded to the outside of the slide cylinder, the guide block is slidably connected to the air intake pipe, the guide block is slidably connected to the slide rod, the slide rod is fixedly connected to the air intake pipe, a compression spring is arranged on the outside of the slide rod, the slide cylinder is fixedly connected to the filter screen, a support shaft is installed on the inside of the filter screen through a sealed bearing, a scraper is fixedly connected to the outside of the left end of the support shaft, the scraper is in contact with the filter screen, and a fan blade is arranged on the outside of the right end of the support shaft.

6. The compression and extraction device for coalbed methane development according to claim 5, characterized in that: One end of the compression spring is fixedly connected to the guide block, and the other end of the compression spring is fixedly connected to the air intake pipe.

7. The compression and extraction device for coalbed methane development according to claim 5, characterized in that: A support ring is fixedly sleeved inside the air inlet pipe, a spring sheet is welded to the left end of the support ring, and the spring sheet is in contact with the fan blade.

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