A ventilation device for underground mining

Abstract

This invention relates to a ventilation device for underground mining, comprising a housing and an electric push rod fixedly installed inside it. A lifting plate is fixedly installed at the extended end of the electric push rod. A dust collection mechanism is movably disposed on one side of the electric push rod, and a dust filtering mechanism is disposed on the other side. When the extended end of the electric push rod is retracted to its longest position, the output end of the air outlet pipe is connected to the exhaust pipe, and the input end of the air intake pipe is connected to the input end of the dust suction pipe. A flip plate blocks the output end of the air intake pipe, at which point the piston disengages from the dust suction pipe, and the dust suction pipe draws air into the air intake pipe, sucking the dust accumulated on the dust screen into the collection box. The extended end of the electric push rod then returns to its longest position. Due to the action of the thrust spring, the piston blocks the dust suction pipe again, preventing dust from flowing back and leaking into the surrounding air, thus avoiding harm to the health of the workers.

Description

Technical Field

[0001] This invention relates to the field of underground ventilation technology in coal mines, specifically a ventilation device for use in mines. Background Technology

[0002] When the coal seam is far from the surface, it is generally chosen to excavate roadways underground to mine coal. This is called underground coal mining. During the mine production process, a large number of roadways are excavated in order to prepare for new levels, new mining areas and longwall faces. When excavating roadways, in order to supply workers with sufficient oxygen and dilute the gas in the excavation face, ventilation must be carried out. A large amount of dust is generated during the excavation process. Existing underground ventilation devices in coal mines directly intercept the dust through dust nets. Since these dust nets need to be cleaned regularly to keep the ventilation equipment running smoothly, this reduces the efficiency of workers. A solution is needed to solve the above-mentioned technical problems.

[0003] As disclosed in the patent document CN115405348A, the device adjusts the ventilation volume by adjusting the deflection angle of the fan blades to ventilate and exhaust harmful gases in the coal mine. When no operation is performed on the fan blades, all the fan blades are in a vertical position. At this time, the ventilation volume is close to zero, which means that the coal mine is sealed and prevents a large amount of smoke and dust from entering the artificial passage.

[0004] However, when the aforementioned device cleans dust from the dustproof net, the dust will float in the surrounding air, which will still harm the underground environment of the coal mine and affect the health of the workers. At the same time, the aforementioned device has blind spots that are not cleaned when cleaning dust, which can easily affect the cleaning efficiency of the dustproof net after long-term use. Summary of the Invention

[0005] The technical problem solved by this solution is:

[0006] (1) How to solve the problem of preventing dust from floating in the surrounding air when cleaning dust screens;

[0007] (2) How to solve the problem of avoiding cleaning dead corners and ensuring the normal operation of the dustproof net.

[0008] The objective of this invention can be achieved through the following technical solution: a ventilation device for underground mining, comprising a housing and an electric push rod fixedly installed inside it, the electric push rod being arranged longitudinally and having a lifting plate fixedly installed at its extended end, a dust collection mechanism being movably arranged on one side of the electric push rod, and a dust filtering mechanism being arranged on the other side of the electric push rod.

[0009] The recycling mechanism includes a recycling bin that is slidably connected to the inner wall of the outer shell via a guide rail. One outer wall of the recycling bin is fixedly connected to a lifting plate. An air outlet pipe is fixedly connected to the top of the recycling bin. A shielding unit for adjusting the air pressure inside the recycling bin is provided at the top of the air outlet pipe. An anti-backflow unit for preventing dust leakage is movably provided at the bottom of the air outlet pipe. A dust suction pipe is fixedly connected to the side of the recycling bin away from the lifting plate.

[0010] A further technical improvement of the present invention is that one end of the suction pipe extends through the outer shell, and a limiting frame for guiding the suction pipe is fixedly installed at the bottom of the outer shell.

[0011] A further technical improvement of the present invention is that: the anti-backflow unit includes a mounting frame fixedly connected to the top of the inner wall of the recycling bin, a horizontally arranged transmission rod is movably inserted on the mounting frame, a piston is fixedly installed at one end of the transmission rod, a thrust spring is elastically arranged between the piston and the mounting frame, and the piston is slidably connected to the inner wall of the output end of the suction pipe.

[0012] A further technical improvement of the present invention is that: a filter screen is fixedly installed on the inner wall of the bottom end of the air outlet pipe, and a cleaning brush for cleaning the filter screen is fixedly installed at the end of the transmission rod away from the piston; after prolonged use of the dustproof net, by activating the electric push rod, its extended end is retracted to its longest state, and the recovery box moves upward. At this time, the output end of the air outlet pipe pushes open the baffle and connects with the exhaust pipe. Simultaneously, the input end of the suction pipe connects with the input end of the dust suction pipe. The lifting plate pushes the roller, causing the flip plate to block the output end of the suction pipe. At this time, the exhaust fan will absorb the air in the recovery box, reduce the air pressure in the recovery box, and make the active... The plug detaches from the suction pipe, allowing the suction pipe to draw air into the air intake pipe, sucking the dust accumulated on the dust screen into the collection box. Once the dust on the dust screen is cleaned, the extended end of the electric push rod returns to its longest position, continuing to absorb air containing harmful gases from the coal mine environment through the air intake pipe. At this point, due to the action of the thrust spring, the piston blocks the suction pipe again, preventing dust from flowing back and leaking into the surrounding air, thus preventing harm to the coal mine environment and affecting the health of the workers. During the piston's reset process, the cleaning brush cleans the dust on the filter screen into the collection box.

[0013] A further technical improvement of the present invention is that: the shielding unit includes an L-shaped plate fixedly connected to the inner wall of the outer shell, a baffle for blocking the outlet end of the air pipe is hinged to the middle of the L-shaped plate, and a first tension spring is fixedly connected between the baffle and the bottom end of the L-shaped plate.

[0014] A further technical improvement of the present invention is that: the filtering mechanism includes an air suction pipe fixedly inserted into the bottom of the outer shell, a dustproof net is fixedly installed on the inner wall of the air suction pipe, and a flip plate for blocking the output end of the air suction pipe is rotatably provided on the inner wall of the outer shell through a pin. A roller is rotatably provided on one end of the flip plate, the position of the roller corresponds to the position of the lifting plate, the position of the input end of the air suction pipe corresponds to the position of the input end of the dust suction pipe, and the end of the flip plate near the roller is elastically connected to the air suction pipe through a second tension spring.

[0015] A further technical improvement of the present invention is that: a plurality of through holes are provided on the outer wall of the suction pipe at equal angles, and the positions of the plurality of through holes are all located below the dustproof net; when the flip plate blocks the output end of the suction pipe, air is sucked into the suction pipe through the dust suction pipe, and the gas in the underground coal mine environment is injected into the suction pipe through the plurality of through holes. The airflow through the plurality of through holes efficiently washes the dust at the bottom of the dustproof net from multiple angles, avoiding cleaning dead corners and improving the efficiency of cleaning the dustproof net.

[0016] A further technical improvement of the present invention is that: an exhaust pipe communicating with the environment above ground is fixedly installed on the top of the outer shell, an exhaust fan is fixedly installed on the inner wall of the exhaust pipe, the position of the exhaust pipe corresponds to the position of the air outlet pipe, and the inner wall size of the exhaust pipe is the same as the outer wall size of the air outlet pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In use, after prolonged use of the dustproof net, the electric push rod is activated, causing its extended end to retract to its longest position. The collection box moves upward, at which point the output end of the air outlet pipe pushes open the baffle and connects with the exhaust pipe. Simultaneously, the input end of the suction pipe connects with the input end of the dust suction pipe. The lifting plate pushes the roller, causing the tilting plate to block the output end of the suction pipe. At this time, the exhaust fan will absorb air from the collection box, reducing the air pressure inside the collection box. This causes the piston to disengage from the dust suction pipe, allowing the dust suction pipe to draw air into the suction pipe, sucking the dust accumulated on the dustproof net into the collection box. Once the dust on the dustproof net is cleaned, the extended end of the electric push rod returns to its longest position, continuing to absorb air containing harmful gases in the coal mine environment through the suction pipe. At this time, due to the action of the thrust spring, the piston blocks the dust suction pipe again, preventing dust from flowing back and leaking into the surrounding air, thus preventing harm to the coal mine environment and affecting the health of workers. During the piston's resetting process, the cleaning brush cleans the dust on the filter screen into the collection box.

[0019] When this invention is in use, if the flip plate blocks the output end of the suction pipe, air is drawn into the suction pipe through the dust suction pipe. The gas in the underground coal mine environment is injected into the suction pipe through several through holes. The airflow through the several through holes will efficiently flush the dust at the bottom of the dustproof net from multiple angles, avoiding cleaning dead corners and improving the efficiency of cleaning the dustproof net. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the recycling mechanism of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 This is a three-dimensional schematic diagram of a partial structure of the anti-backflow unit of the present invention;

[0025] Figure 5 This is a schematic diagram of the shielding unit structure of the present invention;

[0026] Figure 6 This is a cross-sectional view of the filter mechanism of the present invention.

[0027] In the diagram: 1. Exhaust pipe; 2. Recycling mechanism; 3. Limiting frame; 4. Lifting plate; 5. Filtering mechanism; 6. Housing; 7. Electric push rod; 201. Guide rail; 202. Recycling box; 203. Suction pipe; 204. Anti-backflow unit; 205. Air outlet pipe; 206. Shielding unit; 2041. Piston; 2042. Mounting bracket; 2043. Cleaning brush; 2044. Filter screen; 2045. Thrust spring; 2046. Transmission rod; 2061. L-shaped plate; 2062. First tension spring; 2063. Baffle; 501. Flipping plate; 502. Pin; 503. Second tension spring; 504. Through hole; 505. Dustproof net; 506. Suction pipe. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-6As shown, a ventilation device for underground mining includes a housing 6 and an electric push rod 7 fixedly installed inside it. The electric push rod 7 is arranged longitudinally, and a lifting plate 4 is fixedly installed at its extended end. A dust collection mechanism 2 is movably arranged on one side of the electric push rod 7, and a dust filtering mechanism 5 is arranged on the other side of the electric push rod 7.

[0030] Please see Figure 1 and Figure 2 As shown, the recycling mechanism 2 includes a recycling box 202 that is slidably connected to the inner wall of the outer shell 6 via a guide rail 201. One outer wall of the recycling box 202 is fixedly connected to the lifting plate 4. An air outlet pipe 205 is fixedly connected to the top of the recycling box 202. A shielding unit 206 for adjusting the air pressure inside the recycling box 202 is provided at the top of the air outlet pipe 205. An anti-backflow unit 204 for preventing dust leakage is movably provided at the bottom of the air outlet pipe 205. A vacuum pipe 203 is fixedly connected to the side of the recycling box 202 away from the lifting plate 4.

[0031] Please see Figure 1 As shown, one end of the aforementioned suction pipe 203 extends through the outer casing 6, and a limiting bracket 3 for guiding the suction pipe 203 is fixedly installed at the bottom of the outer casing 6.

[0032] Please see Figures 2-4 As shown, the aforementioned anti-backflow unit 204 includes a mounting bracket 2042 fixedly connected to the top of the inner wall of the recycling bin 202. A horizontally arranged transmission rod 2046 is movably inserted into the mounting bracket 2042. A piston 2041 is fixedly installed at one end of the transmission rod 2046. A thrust spring 2045 is elastically arranged between the piston 2041 and the mounting bracket 2042. The piston 2041 is slidably connected to the inner wall of the output end of the suction pipe 203.

[0033] Please see Figure 3 and Figure 4As shown, a filter screen 2044 is fixedly installed on the inner wall of the bottom end of the above-mentioned air outlet pipe 205. A cleaning brush 2043 for cleaning the filter screen 2044 is fixedly installed on the end of the transmission rod 2046 away from the piston 2041. After the dustproof net 505 has been used for a long time, by opening the electric push rod 7, its extended end is retracted to the longest state, and the recycling box 202 moves upward. At this time, the output end of the air outlet pipe 205 pushes open the baffle 2063 and connects with the exhaust pipe 1. At the same time, the input end of the suction pipe 506 connects with the input end of the dust suction pipe 203. The lifting plate 4 pushes the roller, so that the flip plate 501 blocks the output end of the suction pipe 506. At this time, the exhaust fan will absorb the air in the recycling box 202, reduce the air pressure in the recycling box 202, and make the piston 2043 move upward. 41 is disengaged from the suction pipe 203, allowing the suction pipe 203 to draw air into the suction pipe 506, sucking the dust accumulated on the dustproof net 505 into the recycling bin 202. After the dust on the dustproof net 505 is cleaned, the extended end of the electric push rod 7 returns to its longest position and continues to absorb air containing harmful gases in the coal mine environment through the suction pipe 506. At this time, due to the action of the thrust spring 2045, the piston 2041 blocks the suction pipe 203 again to prevent dust from flowing back and leaking and floating in the surrounding air, thus preventing it from harming the environment in the coal mine and affecting the health of the workers. During the resetting process, the piston 2041 cleans the dust on the filter screen 2044 into the recycling bin 202 through the cleaning brush 2043.

[0034] Please see Figure 2 and Figure 5 As shown, the aforementioned shielding unit 206 includes an L-shaped plate 2061 fixedly connected to the inner wall of the outer casing 6. A baffle 2063 for blocking the output end of the air outlet pipe 205 is hinged to the middle of the L-shaped plate 2061. A first tension spring 2062 is fixedly connected between the baffle 2063 and the bottom end of the L-shaped plate 2061.

[0035] Please see Figure 1 and Figure 6 As shown, the above-mentioned filter mechanism 5 includes an air intake pipe 506 fixedly inserted into the bottom of the housing 6. A dustproof net 505 is fixedly installed on the inner wall of the air intake pipe 506. A flip plate 501 for blocking the output end of the air intake pipe 506 is rotatably provided on the inner wall of the housing 6 through a pin 502. A roller is rotatably provided on one end of the flip plate 501. The position of the roller corresponds to the position of the lifting plate 4. The position of the input end of the air intake pipe 506 corresponds to the position of the input end of the dust suction pipe 203. The end of the flip plate 501 near the roller is elastically connected to the air intake pipe 506 through a second tension spring 503.

[0036] Please see Figure 6As shown, the outer wall of the suction pipe 506 is provided with several through holes 504 distributed at equal angles. The positions of the through holes 504 are all located below the dustproof net 505. When the flip plate 501 blocks the output end of the suction pipe 506, air is sucked into the suction pipe 506 through the dust suction pipe 203. The gas in the underground coal mine environment is injected into the suction pipe 506 through the through holes 504. The airflow through the through holes 504 will efficiently flush the dust at the bottom of the dustproof net 505 from multiple angles, avoiding cleaning dead corners and improving the efficiency of cleaning the dustproof net 505.

[0037] Please see Figure 1 As shown, an exhaust pipe 1 that communicates with the environment above ground is fixedly installed on the top of the outer shell 6. An exhaust fan is fixedly installed on the inner wall of the exhaust pipe 1. The position of the exhaust pipe 1 corresponds to the position of the air outlet pipe 205, and the inner wall size of the exhaust pipe 1 is the same as the outer wall size of the air outlet pipe 205.

[0038] Working Principle: In use, the exhaust fan is first turned on, reducing the air pressure inside the outer casing 6 through the exhaust pipe 1. At this time, the extended end of the electric push rod 7 is in its longest position, and the baffle 2063 blocks the output end of the exhaust pipe 205. The suction pipe 506 absorbs air containing harmful gases from the underground coal mine environment, and the dustproof net 505 filters dust to prevent it from entering the outer casing 6. After prolonged use of the dustproof net 505, the electric push rod 7 is turned on, causing it to extend... When the end retracts to its longest position, the recycling bin 202 moves upward. At this time, the output end of the air outlet pipe 205 pushes open the baffle 2063 and connects with the exhaust pipe 1. Simultaneously, the input end of the suction pipe 506 connects with the input end of the vacuum suction pipe 203. The lifting plate 4 pushes the roller, causing the flip plate 501 to block the output end of the suction pipe 506. At this time, the exhaust fan will draw in the air in the recycling bin 202, reducing the air pressure in the recycling bin 202, causing the piston 2041 to disengage from the vacuum suction pipe 203, thus allowing the vacuum suction pipe to... Air is drawn into the suction pipe 506 by 203. Gas from the underground coal mine environment is injected into the suction pipe 506 through several through holes 504. The airflow through the through holes 504 efficiently flushes the dust at the bottom of the dustproof net 505 from multiple angles, avoiding cleaning dead corners and improving the cleaning efficiency of the dustproof net 505. At the same time, the dust accumulated on the dustproof net 505 is sucked into the recycling box 202. After the dust on the dustproof net 505 is cleaned, the extended end of the electric push rod 7 returns to its longest state and continues to absorb air containing harmful gases from the underground coal mine environment through the suction pipe 506. At this time, due to the action of the thrust spring 2045, the piston 2041 blocks the suction pipe 203 again to prevent dust from flowing back and leaking and floating in the surrounding air, which would harm the underground coal mine environment and affect the health of the workers. During the resetting process, the piston 2041 cleans the dust on the filter screen 2044 into the recycling box 202 through the cleaning brush 2043.

[0039] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A ventilation device for use in mines, comprising a housing (6) and an electric actuator (7) fixedly installed therein, characterized in that: The electric push rod (7) has a lifting plate (4) fixedly installed at its extended end. A recycling mechanism (2) for collecting dust is movably provided on one side of the electric push rod (7), and a filtering mechanism (5) for filtering dust is provided on the other side of the electric push rod (7). The recycling mechanism (2) includes a recycling box (202) that is slidably connected to the inner wall of the outer shell (6). One side of the recycling box (202) is fixedly connected to the lifting plate (4). The top of the recycling box (202) is fixedly connected to an air outlet pipe (205). The top of the air outlet pipe (205) is provided with a shielding unit (206) for adjusting the air pressure inside the recycling box (202). The bottom of the air outlet pipe (205) is movably provided with an anti-backflow unit (204) for preventing dust from leaking out. The side of the recycling box (202) away from the lifting plate (4) is fixedly connected to a dust suction pipe (203). The backflow prevention unit (204) includes a mounting bracket (2042) fixedly connected to the inner wall of the recycling bin (202). A transmission rod (2046) is movably inserted on the mounting bracket (2042). A piston (2041) is fixedly installed at one end of the transmission rod (2046). A thrust spring (2045) is elastically provided between the piston (2041) and the mounting bracket (2042). The piston (2041) is slidably connected to the inner wall of the output end of the suction pipe (203). The filter mechanism (5) includes an air suction pipe (506) fixedly inserted into the bottom of the outer shell (6). A dustproof net (505) is fixedly installed on the inner wall of the air suction pipe (506). A flip plate (501) for blocking the output end of the air suction pipe (506) is rotatably arranged on the inner wall of the outer shell (6). A roller is rotatably arranged on one end of the flip plate (501). The position of the roller corresponds to the position of the lifting plate (4). The position of the input end of the air suction pipe (506) corresponds to the position of the input end of the dust suction pipe (203). The end of the flip plate (501) near the roller is elastically connected to the air suction pipe (506) by a second tension spring (503). The outer wall of the air intake pipe (506) has several through holes (504) distributed at equal angles, and the positions of the several through holes (504) are all located below the dustproof net (505).

2. A ventilation device for underground mining according to claim 1, characterized in that, One end of the suction pipe (203) extends through the outer shell (6), and a limiting bracket (3) for guiding the suction pipe (203) is fixedly installed at the bottom of the outer shell (6).

3. A ventilation device for underground mining according to claim 1, characterized in that, A filter screen (2044) is fixedly installed on the inner wall of the bottom end of the air outlet pipe (205), and a cleaning brush (2043) for cleaning the filter screen (2044) is fixedly installed at the end of the transmission rod (2046) away from the piston (2041).

4. A ventilation device for underground mining according to claim 1, characterized in that, The shielding unit (206) includes an L-shaped plate (2061) fixedly connected to the inner wall of the outer shell (6). A baffle (2063) for blocking the output end of the air outlet pipe (205) is hinged to the middle of the L-shaped plate (2061). A first tension spring (2062) is fixedly connected between the baffle (2063) and the bottom end of the L-shaped plate (2061).

5. A ventilation device for underground mining according to claim 1, characterized in that, The top of the outer shell (6) is fixedly installed with an exhaust pipe (1) that communicates with the environment above the ground. The position of the exhaust pipe (1) corresponds to the position of the air outlet pipe (205), and the inner wall size of the exhaust pipe (1) is the same as the outer wall size of the air outlet pipe (205).

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