Gas pumping device
By introducing components such as a self-cleaning gas collection hood, a blower, a water vapor separator, and a multi-stage filter into the gas extraction device, the problems of filter clogging and water vapor mixing are solved, achieving efficient gas extraction and purification, and improving safety and utilization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-03-24
AI Technical Summary
Existing gas extraction devices cannot completely clear the filter mesh, resulting in reduced extraction efficiency and the extracted gas being mixed with a large amount of water vapor, affecting subsequent utilization efficiency.
It adopts components such as a self-cleaning gas collection hood, exhaust fan, water vapor separation device, multi-stage filter screen and high-pressure water spray device, combined with centrifugal separation and filtration methods to prevent filter screen clogging, separate water vapor in gas, and improve gas purity.
It effectively prevents filter clogging, improves gas extraction efficiency, enhances safety, increases gas purity and utilization efficiency, and reduces safety hazards.
Smart Images
Figure CN224032643U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of coal mine, more particularly to a gas extraction device. BACKGROUND
[0002] As the main harmful gas generated in the process of coal mining, if not timely and effective extraction, gas explosion, suffocation and other serious safety accidents are easily caused. With the continuous development of mining technology, various gas extraction devices emerge as the times require, and some devices are designed with self-cleaning function to reduce maintenance cost and improve work efficiency, which reduces the risk of filter screen blockage to a certain extent.
[0003] However, the cleaning method of the existing gas extraction device with self-cleaning function is mostly limited to simple scraping. When the coal dust, particles and other impurities in the mine adhere to the surface of the filter screen, this simple scraping can only remove part of the impurities on the surface of the filter screen, and cannot effectively dredge the small particles that have been blocked in the filter screen mesh. With the increase of use time, the filter screen mesh blockage becomes more and more serious, which leads to a sharp decline in extraction efficiency, increases the operating load of the equipment, and may cause safety hazards due to untimely extraction.
[0004] In addition, the internal environment of the mine gas discharge channel is complex, and the humidity is generally high. During the gas extraction process, a large amount of water vapor will be extracted with the gas. These gas mixed with water vapor will bring many inconveniences in the subsequent transportation, storage and utilization process. For example, water vapor will increase the corrosion risk of gas conveying pipeline, reduce the service life of pipeline; when gas is burned and utilized, water vapor will absorb heat, reduce combustion efficiency and affect the effective utilization of energy. Therefore, the existing gas extraction device cannot completely dredge the filter screen mesh and the gas extracted mixed with a large amount of water vapor leads to the problems of low efficiency of gas extraction and utilization. SUMMARY
[0005] Therefore, the utility model provides a gas extraction device, which can solve the problem of low efficiency of gas extraction and utilization caused by the fact that the filter screen mesh cannot be completely dredged and the extracted gas is mixed with a large amount of water vapor.
[0006] The utility model is realized as follows:
[0007] The utility model provides a gas extraction device, which comprises a self-cleaning gas collection cover, an air extraction machine connected to the end of the self-cleaning gas collection cover through the first segment of the transmission pipeline, a water vapor separation device connected to the end of the first segment of the transmission pipeline, a gas storage tank connected to one end of the second segment of the transmission pipeline and the other end of the second segment of the transmission pipeline through an electric control valve and a gas mixing assembly.
[0008] The technical effect of the gas extraction device is as follows: the opening is directed to the gas emission hole or channel, the self-cleaning function prevents dust and sand from blocking the filter screen mesh, improves the gas extraction efficiency, and prevents the high gas concentration near the emission hole from causing safety hazards; the suction fan is arranged as a power source to provide power for the gas extraction, and the filtered gas is transported from the collecting cover to the subsequent processing link; the water vapor separation device is arranged, the centrifugal separation and filtration are combined, the water vapor in the gas is separated, the gas purity is improved, the subsequent transportation is facilitated, and the utilization efficiency is improved; the transmission pipeline is arranged to guide the gas flow; the gas storage tank is arranged to store the treated gas, so that the subsequent transportation and utilization are facilitated.
[0009] On the basis of the above technical scheme, the gas extraction device of the utility model can also be improved as follows:
[0010] The self-cleaning gas collecting cover comprises a collecting cover, and a plurality of filter screens are arranged in the collecting cover.
[0011] The beneficial effect of the above-mentioned improvement scheme is that the plurality of filter screens are arranged to intercept and filter dust impurities, prevent dust from entering the device, and affect the service life of the device.
[0012] Further, the high-pressure water spraying device is connected with the pipeline of the external cleaning water supply system.
[0013] The beneficial effect of the above-mentioned improvement scheme is that the external cleaning water supply system is connected to provide high-pressure water to the high-pressure water spraying device, so that the dust accumulated on the plurality of filter screens can be washed away through the nozzles of the high-pressure water spraying device, the filter screen holes are prevented from being blocked by dust, the gas extraction efficiency is improved, and the flow channel is kept unobstructed.
[0014] Further, the plurality of filter screens comprise a coarse-pore filter screen at the bottom and a fine-pore filter screen at the top.
[0015] Further, the coarse filter screen mesh is 0.5-2mm, the fine filter screen mesh is 0.05-0.5mm, and the plurality of filter screens are fixedly installed on the inner wall of the collecting cover through clamping grooves.
[0016] Further, the nozzles of the high-pressure water spraying device are annularly distributed on the top of the collecting cover, the nozzles are threadedly connected with the water spraying pipeline of the high-pressure water spraying device, the water spraying pipeline is connected with the connecting hose of the external cleaning water supply system through a quick connector, and a control valve is installed on the water spraying pipeline.
[0017] The beneficial effect of the above-mentioned improvement scheme is that the control valve is used to control the output of high-pressure clean water.
[0018] Further, the inner wall of the transmission pipeline is provided with spiral protrusions, the spiral protrusions are uniformly distributed along the pipeline in the axial direction, and the cross-sectional shape is isosceles trapezoidal.
[0019] The beneficial effect of the above improvement scheme is that by setting spiral protrusions on the inner wall of the transmission pipeline, a flow rate enhancement structure is constructed, the gas gas forms a spiral flow in the pipeline, the flow rate and the turbulence degree are increased, and the pumping efficiency is improved.
[0020] Further, the upper base width of the isosceles trapezoid is 5-10mm, the lower base width is 10-20mm, the height is 3-8mm, the spiral pitch is 1-2 times the pipeline diameter, and the inclination angle of the spiral protrusion is 30°-60°.
[0021] Further, the monitoring sensor group includes a gas concentration sensor and a flow rate sensor, the gas concentration sensor is arranged inside the second segment of the transmission pipeline, and the flow rate sensor is arranged inside the first segment of the transmission pipeline.
[0022] The beneficial effect of the above improvement scheme is that by setting the gas concentration sensor, the gas gas concentration inside the second segment of the transmission pipeline is monitored; by setting the flow rate sensor, the flow rate of the pumped gas gas in the first segment of the transmission pipeline is monitored.
[0023] Further, the gas mixing assembly includes an input channel and a gas pump, the output end of the gas pump is connected with the input channel, and the input channel is communicated with the second segment of the transmission pipeline through an electric control valve.
[0024] The beneficial effect of the above improvement scheme is that by the gas concentration sensor and the electric control valve, the gas gas concentration inside the second segment of the transmission pipeline is adjusted to prevent safety hazards caused by excessively high concentration.
[0025] Compared with the prior art, the gas extraction device has the beneficial effects that: the opening is directed to the gas emission hole or channel, dust and gravel are prevented from blocking the filter screen mesh through the self-cleaning function, the gas extraction efficiency is improved, and the high gas concentration near the emission hole is prevented from causing safety hazards; the extraction fan is arranged as a power source to provide power for gas extraction, and the filtered gas is transported from the collecting cover to a subsequent processing link; the water vapor separation device is arranged, the centrifugal separation and filtration are combined, the water vapor in the gas is separated, the gas purity is improved, subsequent transportation and utilization efficiency are facilitated; the transmission pipeline is arranged to guide the gas flow; the gas storage tank is arranged to store the treated gas, so that the gas can be transported and utilized subsequently; the multi-stage filter screen is arranged to intercept and filter dust impurities; dust is prevented from invading the inside of the device to affect the service life of the device; the external cleaning water supply system is connected to provide high-pressure water to the high-pressure water spraying device from the outside, so that the dust accumulated on the multi-stage filter screen can be washed away through the high-pressure water spraying device, the dust is prevented from blocking the filter screen mesh to affect the gas extraction efficiency, and the flow channel is kept unobstructed. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0027] Figure 1 It is a structural schematic view of a gas extraction device.
[0028] Figure 2 It is a structural schematic view of a self-cleaning gas collecting cover.
[0029] In the drawings, the component list represented by each reference numeral is as follows:
[0030] 10, self-cleaning gas collecting cover; 101, collecting cover; 102, multi-stage filter screen; 103, high-pressure water spraying device; 11, extraction fan; 12, water vapor separation device; 13, transmission pipeline; 14, gas storage tank; 15, gas concentration sensor; 16, flow rate sensor; 17, input channel; 18, gas pump. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.
[0032] As Figure 1 , 2 is an embodiment of the gas extraction device provided by the utility model, in this embodiment, including self cleaning gas collection cover 10, self cleaning gas collection cover 10 end is connected with the air extractor 11 through the first section of transmission pipeline 13, the first section of transmission pipeline 13 end is connected with water vapor separation device 12, the second section of transmission pipeline 13 one end is connected with water vapor separation device 12, the other end is connected with gas storage tank 14, monitoring sensor group is arranged in the inside of transmission pipeline 13, the second section of transmission pipeline 13 is connected with gas mixing assembly through electric control valve.
[0033] By arranging self cleaning gas collection cover 10 near the gas emission point, starting air extractor 11 as power source, after extracting gas into collection cover 101, first intercepting larger size dust particles through coarse filter screen, then further filtering small particle dust impurities through fine filter screen, with the progress of the collection process, when flow sensor 16 monitors the flow rate of the first section of transmission pipeline 13 reduces, timely stopping air extractor 11, opening high pressure water jet device 103 by control valve to flush the sand and sundries deposited on the surface from upper layer to lower layer, when flushing is finished, restoring air extractor 11, providing power for gas extraction, conveying gas to water vapor separation device 12 through the first section of transmission pipeline 13, in water vapor separation device 12, the water vapor mixed in gas is further separated, after treatment, gas is finally conveyed to gas storage tank 14 through the second section of transmission pipeline 13 for storage, for subsequent transportation and utilization.
[0034] In the above technical solution, self cleaning gas collection cover 10 includes collection cover 101, multiple filter screens 102 are arranged in the inside of collection cover 101, high pressure water jet device 103 is arranged at the top end of multiple filter screens 102.
[0035] Further, in the above technical solution, high pressure water jet device 103 is connected with the pipeline of external cleaning water supply system.
[0036] Further, in the above technical solution, multiple filter screens 102 include coarse aperture filter screen at the bottom layer and fine aperture filter screen at the top layer.
[0037] Further, in the above technical solution, the mesh of coarse filter screen is 0.5-2mm, the mesh of fine filter screen is 0.05-0.5mm, multiple filter screens 102 are fixedly installed in the inner wall of collection cover 101 through clamping grooves.
[0038] Further, in the above technical solution, the spray head of high pressure water jet device 103 is annularly distributed at the top of collection cover 101, the spray head is connected with the water jet pipeline of high pressure water jet device 103 through screw thread connection, the water jet pipeline is connected with the connecting hose of external cleaning water supply system through quick connector, and the control valve is installed on the water jet pipeline.
[0039] Further, in the above technical solution, the inner wall of the transmission pipeline 13 is provided with spiral protrusions, which are uniformly distributed along the axial direction of the pipeline and have an isosceles trapezoidal cross-sectional shape.
[0040] When the gas flows in the transmission pipeline 13, the spiral protrusions guide the gas to form a spiral flow. The spiral flow not only increases the flow speed of the gas, but also forms a turbulent flow in the transmission pipeline 13, reducing the contact area between the gas and the inner wall of the pipeline and the frictional resistance, thereby improving the overall efficiency of gas extraction. At the same time, the spiral flow also generates centrifugal force, causing the particulate impurities to gather towards the center of the pipeline, reducing the deposition of particulate impurities on the inner wall of the pipeline, further ensuring the smoothness of the pipeline, and also facilitating the removal of small particles along with the water vapor in the water vapor separation device 12.
[0041] Further, in the above technical solution, the upper base width of the isosceles trapezoid is 5-10 mm, the lower base width is 10-20 mm, the height is 3-8 mm, the spiral pitch is 1-2 times the diameter of the pipeline, and the inclination angle of the spiral protrusions is 30°-60°.
[0042] Further, in the above technical solution, the monitoring sensor group includes a gas concentration sensor 15 and a flow rate sensor 16, the gas concentration sensor 15 is arranged inside the second segment of the transmission pipeline 13, and the flow rate sensor 16 is arranged inside the first segment of the transmission pipeline 13.
[0043] Further, in the above technical solution, the gas mixing assembly includes an input channel 17 and a gas pump 18, the output end of the gas pump 18 is connected with the input channel 17, and the input channel 17 is communicated with the second segment of the transmission pipeline 13 through an electric control valve.
[0044] In use, when the gas concentration sensor 15 detects that the gas concentration inside the second segment of the transmission pipeline 13 exceeds a preset value, the electric control valve is opened to inject air into the inside of the transmission pipeline 13 through the input channel 17 by the gas pump 18, so as to mix the gas and reduce the concentration of the gas.
[0045] Further, in the above technical solution, the external cleaning water supply system includes a water storage device (such as a water tank or a water tank), a water pump, and a water pipeline; the external cleaning water supply system, the gas storage tank, and the water vapor separation device are fixedly arranged on the ground operation platform, and the water storage device is used to store clean water to provide water source for the whole system. The water pump is used to drive the flow of clean water, which can cooperate with a pressurizing device to deliver clean water to the high-pressure water spraying device at a certain pressure.
[0046] The high-pressure water spraying device is connected with an external cleaning water supply system through a water delivery pipe, when the water pump is started, the cleaning water flows to the high-pressure water spraying device along the pipe under the action of pressure; every 30° of the high-pressure water spraying device is provided with a spray head, 12 spray heads are arranged around the top end circumference of the collecting cover, and the spray heads are diffusion type spray heads, one spray head has 3-5 nozzles, the nozzles are distributed at different angles (such as vertically outwardly inclined by 15°), so that the water flow can impact the filter screen from multiple directions, and the washing effect on the filter screen is improved. The spray heads will spray the cleaning water at high speed, wherein the layer spacing of the multi-stage filter screen is 3-5 mm, and the filter screen is washed from the top layer to the lower layer.
[0047] Specifically, the principle of the utility model is: through the self-cleaning gas collecting cover 10 is arranged near the gas emission point; starting the air extractor 11 as a power source to extract the gas into the collecting cover 101, first intercepts the dust particles of larger particle size through the coarse filter screen, and then further filters the small particle dust impurities through the fine filter screen; with the progress of the collection process, when the flow sensor 16 monitors that the flow rate of the first section of the transmission pipeline 13 decreases, the air extractor 11 is stopped in time, the high-pressure water spraying device 103 is opened by the control valve to wash the accumulated silt and sundries from the upper layer to the lower layer; after the washing is finished, the air extractor 11 is restored, which provides power for the gas extraction, and the gas is transported to the water vapor separation device 12 through the first section of the transmission pipeline 13, in the water vapor separation device 12, the water vapor mixed in the gas is further separated; the treated gas is finally transported to the gas storage tank 14 through the second section of the transmission pipeline 13 for storage, so as to be transported and utilized subsequently.
Claims
1. A gas extraction device, characterized in that, It includes a self-cleaning gas collection hood (10), the end of which is connected to a fan (11) via a first section of a transmission pipeline (13), the end of which is connected to a water vapor separator (12), one end of which is connected to the water vapor separator (12), and the other end of which is connected to a gas storage tank (14). A monitoring sensor group is installed inside the transmission pipeline (13), and the second section of the transmission pipeline (13) is connected to a gas mixing component via an electrically controlled valve.
2. The gas extraction device according to claim 1, characterized in that, The self-cleaning gas collection hood (10) includes a collection hood (101), inside which a multi-stage filter screen (102) is provided, and a high-pressure water spray device (103) is provided at the top of the multi-stage filter screen (102).
3. A gas extraction device according to claim 2, characterized in that, The high-pressure water spray device (103) is connected to the external clean water supply system via piping.
4. A gas extraction device according to claim 3, characterized in that, The multi-stage filter (102) includes a bottom coarse-pore filter and a top fine-pore filter.
5. A gas extraction device according to claim 4, characterized in that, The coarse filter screen has a mesh size of 0.5-2mm, the fine filter screen has a mesh size of 0.05-0.5mm, and the multi-stage filter screen (102) is fixedly installed on the inner wall of the collection cover (101) through a slot.
6. A gas extraction device according to claim 5, characterized in that, The nozzles of the high-pressure water spray device (103) are arranged in a ring on the top of the collection hood (101). The nozzles are connected to the water spray pipe of the high-pressure water spray device (103) by thread. The water spray pipe is connected to the connecting hose of the external clean water supply system through a quick connector. A control valve is installed on the water spray pipe.
7. A gas extraction device according to claim 6, characterized in that, The inner wall of the transmission pipeline (13) is provided with spiral protrusions, which are evenly distributed along the axial direction of the pipeline and have an isosceles trapezoidal cross-section.
8. A gas extraction device according to claim 7, characterized in that, The isosceles trapezoid has an upper base width of 5-10mm, a lower base width of 10-20mm, a height of 3-8mm, a spiral pitch of 1-2 times the pipe diameter, and a spiral protrusion tilt angle of 30°-60°.
9. A gas extraction device according to claim 8, characterized in that, The monitoring sensor group includes a gas concentration sensor (15) and a flow rate sensor (16). The gas concentration sensor (15) is located inside the second section of the transmission pipeline (13), and the flow rate sensor (16) is located inside the first section of the transmission pipeline (13).
10. A gas extraction device according to claim 9, characterized in that, The gas mixing assembly includes an input channel (17) and an air pump (18). The output end of the air pump (18) is connected to the input channel (17), and the input channel (17) is connected to the second section of the transmission pipeline (13) through an electrically controlled valve.