Coal mine underground compressed air filtering device

Abstract

The utility model relates to an underground coal mine compressed air filtering device which comprises a shell, an air inlet and an air outlet are formed in the shell, and the air outlet is used for being communicated with an air inlet pipe of compressed air equipment; the filter assembly comprises a mounting frame and a filter screen mounted on the mounting frame, and under the suction action of the compressed air equipment, external air vertically acts on the filter screen through the air inlet to be filtered and enters an air inlet pipe of the compressed air equipment through the air outlet; wherein sliding grooves are formed in the two opposite side walls of the shell, the two sides of the mounting frame are in sliding connection with the sliding grooves, a maintenance opening and a cover plate for sealing the maintenance opening are formed in the positions, corresponding to the filtering assembly, of the top wall of the shell, the filtering assembly is mounted in the shell in a pluggable mode through the maintenance opening, and the mounting frame can be mounted in the shell in a pluggable mode through the maintenance opening. Therefore, a user pulls the mounting frame upwards, the filter screen connected with the mounting frame can leave the interior of the shell, workers can maintain the filter screen conveniently, and the working stability and reliability of the filter screen are guaranteed.

Description

Technical Field

[0001] This disclosure relates to the field of compressed air equipment technology, specifically to a compressed air filtration device for underground coal mines. Background Technology

[0002] A coal mine compressed ventilation system is a device used for emergency rescue in coal mine accidents. In coal mining operations, accidents such as fires and gas explosions can occur due to various reasons, trapping miners. By providing emergency ventilation and oxygen supply, a coal mine compressed ventilation system can help trapped miners save themselves after an accident, increasing their chances of survival.

[0003] A compressed air system may include a compressor and a filter installed on the compressor's inlet duct. The filter prevents dust and other particulate impurities from entering the compressor. However, in related technologies, maintenance of the filter is relatively inconvenient for technicians. Utility Model Content

[0004] The purpose of this disclosure is to provide a compressed air filtration device for underground coal mines, so as to at least partially solve the problems existing in the related art.

[0005] To achieve the above objectives, this disclosure provides a coal mine underground compressed air filtration device, comprising:

[0006] The housing has an air inlet and an air outlet, the air outlet being used to connect to the air inlet pipe of the compressed air device; and

[0007] The filter assembly includes a mounting frame and a filter screen mounted on the mounting frame. Under the suction action of the air compressor, external air is filtered by the filter screen acting vertically through the air inlet and enters the air inlet pipe of the air compressor through the air outlet.

[0008] The housing has sliding grooves on its opposite side walls, and the two sides of the mounting frame are slidably connected to the sliding grooves. A maintenance port and a cover plate for closing the maintenance port are provided on the top wall of the housing at a position corresponding to the filter assembly. The filter assembly is pluggably installed in the housing through the maintenance port.

[0009] Optionally, the filter assembly is disposed inside the housing near the air inlet, and an air guide shroud is provided between the filter assembly and the air outlet, the inner diameter of the air guide shroud gradually decreasing along the gas flow direction.

[0010] Optionally, the filter device further includes a dust removal assembly, which is located on the side of the filter assembly near the air inlet. The dust removal assembly includes a drive member and a scraper detachably mounted on the drive member. The drive member drives the scraper to rotate to scrape off dust from the filter assembly.

[0011] Optionally, the length of the scraper is configured to be half the height of the housing.

[0012] Optionally, the driving element includes:

[0013] Mounting base, wherein the two connecting arms of the mounting base are fixed to the inner wall of the housing;

[0014] A fan, the fan rotating about a shaft, one end of the shaft being rotatably connected to the mounting base; and

[0015] A mounting bracket is located at the other end of the rotating shaft, and the scraper is detachably mounted on the mounting bracket.

[0016] The fan can rotate under the drive of the air in the air inlet, and drive the scraper to rotate through the mounting bracket.

[0017] Optionally, the mounting bracket is provided with a receiving groove, the receiving groove has a T-shaped cross-section, and the scraper has an I-shaped cross-section at one end near the mounting bracket and is inserted into the receiving groove.

[0018] Optionally, the housing is further provided with an ash storage hopper, which is located below the ash removal assembly.

[0019] Optionally, a flap valve is installed at the bottom of the ash hopper.

[0020] Optionally, the edge of the maintenance opening is formed with a first step, and the cover plate is provided with a second step that matches the first step. When the cover plate is placed over the maintenance opening, the second step abuts against the first step.

[0021] Optionally, both the cover plate and the housing are provided with mounting holes, and the cover plate and the housing are detachably connected by fasteners that pass through the mounting holes respectively.

[0022] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0023] When the filter components inside the housing need to be repaired or maintained, the cover plate and maintenance port can be disassembled and separated. The mounting frame can be plugged into the housing through the maintenance port. Therefore, the user can pull the mounting frame upward to allow the filter screen connected to the mounting frame to leave the housing, which is convenient for workers to maintain and care for the filter screen and ensures the stability and reliability of the filter screen's operation.

[0024] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of an underground compressed air filtration device for coal mines, according to an exemplary embodiment of the present disclosure.

[0027] Figure 2 This is a side view of an underground compressed air filtration device for coal mines, as shown in an exemplary embodiment of this disclosure.

[0028] Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0029] Figure 4 This is a cross-sectional view of a partial structure of an underground compressed air filtration device for coal mines, according to an exemplary embodiment of this disclosure.

[0030] Figure 5 This is a schematic diagram of a dust removal component in an underground compressed air filtration device for coal mines, according to an exemplary embodiment of the present disclosure.

[0031] Explanation of reference numerals in the attached figures

[0032] 100. Housing; 110. Air inlet; 120. Air outlet; 130. Maintenance port; 131. First step; 140. Ash hopper; 150. Slide rail; 200. Cover plate; 210. Sealing strip; 300. Filter assembly; 310. Mounting frame; 320. Filter screen; 400. Dust removal assembly; 410. Scraper; 411. Strip groove; 420. Fan; 430. Mounting bracket; 431. Receiving groove; 432. Bending section; 450. Mounting base; 510. Flip-type ash discharge valve; 520. Air guide cover. Detailed Implementation

[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0034] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" are used for ease of description based on the drawing orientations of the corresponding figures, while "inner" and "outer" are defined based on the contours of the corresponding components themselves. Terms such as "first" and "second" used in this disclosure are used to distinguish one element from another and do not have sequential or importance implications. Furthermore, when the following description refers to the figures, unless otherwise indicated, the same numbers in different figures represent the same or similar elements.

[0035] Please see Figures 1 to 3 This disclosure provides a compressed air filtration device for underground coal mines, including a housing 100 and a filter assembly 300. The housing 100 may have an air inlet 110 and an air outlet 120, with the outlet 120 connecting to the air inlet pipe of a compressed air device (not shown). The filter assembly 300 may include a mounting frame 310 and a filter screen 320 mounted on the mounting frame 310. Under the suction of the compressed air device, external air passes through the air inlet 110 and acts vertically on the filter screen 320 for filtration, and then enters the air inlet pipe of the compressed air device through the air outlet 120. The housing 100 may have sliding grooves 150 on its opposite side walls, and the sides of the mounting frame 310 may be slidably connected to the sliding grooves 150. A maintenance port 130 and a cover plate 200 for closing the maintenance port 130 may be provided on the top wall of the housing 100 at a position corresponding to the filter assembly 300. The filter assembly 300 can be plugged into and detachably installed within the housing 100 through the maintenance port 130.

[0036] Understandably, when the filter assembly 300 inside the housing 100 needs to be repaired or maintained, the cover plate 200 and the maintenance port 130 are disassembled and separated. The mounting frame 310 can be plugged into and installed inside the housing 100 through the maintenance port 130. Therefore, the user can pull the mounting frame 310 upward so that the filter screen 320 connected to the mounting frame 310 can leave the inside of the housing 100, which is convenient for workers to maintain and care for the filter screen 320 and ensure the stability and reliability of the filter device.

[0037] In this embodiment, please refer to Figure 2 and Figure 3 The air inlet 110 and the air outlet 120 can be positioned opposite each other on the housing 100 to ensure that air can pass through the housing 100 quickly. The air inlet 110 and the air outlet 120 can be connected to the air inlet pipe and the air outlet pipe respectively via flanges.

[0038] In this embodiment, please refer to Figure 4 Sealing strips 210 can be affixed to the two opposite walls of the chute 150 to prevent air from passing through the gap between the chute 150 and the filter screen 320. The filter screen 320 can be located directly below the chute opening, and a sealing strip 210 can be provided at the bottom of the cover plate 200. The sealing strip 210 can compress the top of the filter screen 320 to prevent unfiltered air from passing through the gap between the cover plate 200 and the filter screen 320, thus ensuring the filtration effect of the filter screen 320.

[0039] In one implementation, please refer to Figure 4The filter assembly 300 is disposed within the housing 100 near the air inlet 110. An air guide shroud 520 is provided between the filter assembly 300 and the air outlet 120. The inner diameter of the air guide shroud 520 gradually decreases along the gas flow direction. That is, the air guide shroud 520 is a hollow frustum shape, with its diameter gradually decreasing towards the air outlet 120. The diameter of the end of the air guide shroud 520 near the air outlet 120 is the same as the diameter of the air outlet 120. The air guide shroud 520 can guide the gas flow and increase the speed of air movement from the filter 320 to the air outlet 120.

[0040] In one implementation, please refer to Figure 3 and Figure 5 The filter assembly 300 may further include a dust removal assembly 400, which can be located on the side of the filter assembly 300 near the air inlet 110. The dust removal assembly 400 includes a drive component and a scraper 410 detachably mounted on the drive component. The drive component drives the scraper 410 to rotate to scrape away dust on the filter assembly 300, preventing air from being blocked due to clogging of the filter screen 320 in the filter assembly 300, and ensuring that the filter assembly 300 can work stably. Furthermore, the dust removal assembly 400 can continuously perform cleaning movements to ensure cleaning effectiveness. The dust removal assembly 400 can also perform intermittent movements depending on the degree of clogging of the filter assembly 300.

[0041] In this embodiment, please refer to Figure 3 and Figure 5 The length of the scraper 410 can be configured to be half the height of the housing 100 to avoid interference between the scraper 410 and the top or bottom wall of the housing 100 when rotating. The driving component may include a mounting base 450, a fan 420, and a mounting bracket 430. The two connecting arms of the mounting base 450 can be fixed to the inner wall of the housing 100. The fan 420 rotates around an axis, one end of which is rotatably connected to the mounting base 450. The mounting bracket 430 can be located at the other end of the axis, and the scraper 410 is pluggably mounted on the mounting bracket 430. The fan 420 can rotate under the drive of air from the air inlet 110, and drive the scraper 410 to rotate via the mounting bracket 430. The scraper 410 can be provided with soft bristles; the elasticity of the bristles allows them to cover a larger area, ensuring the effectiveness of the dust removal assembly 400.

[0042] Understandably, under the suction of the air compressor, air can enter the housing 100 through the air inlet 110. The fan 420 rotates by the air flow, so that the scraper 410 can rotate to scrape the dust removal component 400, thus preventing the dust removal component 400 from being blocked and ensuring the flow of gas.

[0043] In another embodiment, the driving component can be a linear module, which is connected to the scraper 410 to drive the scraper 410 to move up and down; or, the driving component can be a drive motor and a reducer connected to the drive shaft of the drive motor, with the output end of the reducer connected to the scraper 410 to drive the scraper 410 to rotate.

[0044] In one implementation, please refer to Figure 3 and Figure 5 The mounting bracket 430 may be provided with a receiving groove 431. The cross-section of the receiving groove 431 may be constructed as a T-shape, that is, the opening of the receiving groove 431 may be bent inward to form a bent portion 432. "Inward" refers to the side of the mounting bracket 430 near the scraper 410 when the scraper 410 is inside the mounting bracket 430. The cross-section of the end of the scraper 410 near the mounting bracket 430 may be constructed as an I-shape and may be inserted into the receiving groove 431. That is, both sides of the scraper 410 may be provided with strip grooves 411, the side of the scraper 410 near the mounting bracket 430 may be inserted into the receiving groove 431, and the strip grooves 411 may be inserted into the bent portion 432. The side wall of the strip groove 411 is provided with anti-slip strips. When the scraper 410 and the mounting bracket 430 are inserted, the anti-slip strips can contact the bent part 432. The anti-slip strips can increase the friction between the two to prevent the scraper 410 from sliding relative to the mounting bracket 430 during rotation, thus ensuring the stability and reliability of the scraper 410.

[0045] Understandably, when scraper 410 needs to be replaced, the user can remove the old scraper from the mounting bracket 430 by pulling it upwards. The user aligns the groove 411 of the new scraper with the bend 432 and pushes the new scraper downwards so that one side of the new scraper can enter the receiving groove 431 until the bottom of the new scraper can abut against the bottom of the receiving groove 431, preventing the scraper 410 from slipping off the mounting bracket 430 during use. The bottom refers to the end of the scraper 410 that first enters the receiving groove 431 during insertion.

[0046] In one implementation, please refer to Figure 3 and Figure 4 The housing 100 may also be provided with a dust collection hopper 140, which can be located below the dust removal component 400 to ensure that the dust scraped by the dust removal component 400 can be discharged from the housing 100 in a timely manner, avoiding a large accumulation of dust. The dust collection hopper 140 can be constructed in a conical shape to facilitate the rapid sliding of dust.

[0047] Further, please refer to Figure 3A flap valve 510 can be installed at the ash hopper 140. The valve plate of the flap valve 510 can be automatically opened under the action of gravity of the dust. After the dust falls, the counterweight lever system can make the valve plate automatically reset to prevent the wind from blowing in. At the same time, it reduces the frequency of manual cleaning of dust inside the housing 100 and improves work efficiency.

[0048] The 510 flap ash discharge valve can be a double-layer counterweight flap ash discharge valve. When the dust particles accumulate to a certain weight, the upper counterweight flap ash discharge valve opens, allowing the dust particles to fall into the lower cavity. Under the action of its own counterweight lever system, the raft plate automatically resets and closes the upper valve. The lower valve works on the same principle as the upper valve, thus achieving automatic ash discharge.

[0049] In one implementation, please refer to Figures 2 to 4 The edge of the maintenance opening 130 may have a first step 131, and the cover plate 200 may have a second step that matches the first step 131. When the cover plate 200 is placed over the maintenance opening 130, the second step abuts against the first step 131, facilitating the positioning and installation of the cover plate 200. The circumferential direction of the cover plate 200 can contact the edge of the maintenance opening 130 through a sealing element to prevent dust from overflowing.

[0050] In this embodiment, both the maintenance opening 130 and the cover plate 200 can be constructed as square. The first set of maintenance openings 130 has two opposing edges with first steps 131, and the second set of maintenance openings 130 has two opposing edges that are straight (i.e., without steps). The first set of cover plate 200 has two opposing side walls with second steps that match the first steps 131, and the other set of opposing side walls is straight. The housing 100 provides support for the cover plate 200 and provides positioning for its installation using one set of steps. Of course, in other embodiments, the maintenance opening 130 has two sets of first steps 131, and the cover plate 200 has two sets of second steps circumferentially. The two sets of first steps 131 can provide stable support for the cover plate 200.

[0051] In one implementation, please refer to Figure 1 and Figure 3Both the cover plate 200 and the housing 100 can be provided with mounting holes. The cover plate 200 and the housing 100 can be detachably connected by fasteners that pass through the mounting holes. This detachable method facilitates the inspection and replacement of components inside the housing 100. The fasteners can be screws or bolts, etc. When the cover plate 200 is square, it has four mounting holes, which can be distributed at the four corners of the cover plate 200. The housing 100 also has four mounting holes, which correspond one-to-one with the four mounting holes of the cover plate 200. Of course, in other embodiments, the cover plate 200 and the maintenance port 130 can be circular or polygonal, etc. The number of mounting holes in the cover plate 200 and the housing 100 can be three, five, or six or more, etc., without specific limitations.

[0052] In this embodiment, please refer to Figure 3 The mounting holes of the housing 100 can be formed on the first step 131. The user can first place the cover plate 200 on the first step 131, and then pass the fasteners through the mounting holes of the cover plate 200 and the first step 131, so that the cover plate 200 can be installed on the first step 131. Of course, in other embodiments, the maintenance opening 130 may not have the first step 131, and the mounting holes of the housing 100 are located at the edge of the maintenance opening 130.

[0053] In another embodiment, the cover plate 200 can be snapped or magnetically connected to the housing 100.

[0054] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0056] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A coal mine underground air pressure filtering device, characterized in that, The utility model relates to a filter device for air filter, comprising: a housing, which is provided with an air inlet and an air outlet for communicating with an air inlet pipe of an air compressor; and a filter assembly, which comprises a mounting frame and a filter screen mounted on the mounting frame, and under the suction of the air compressor, external air is vertically applied to the filter screen through the air inlet for filtration and enters the air inlet pipe of the air compressor through the air outlet; wherein, the opposite two side walls of the housing are provided with sliding grooves, the two sides of the mounting frame are slidably connected with the sliding grooves, and a maintenance opening and a cover plate for closing the maintenance opening are formed on the top wall of the housing at a position corresponding to the filter assembly, the filter assembly is pluggably mounted in the housing through the maintenance opening; the cover plate and the housing are both provided with mounting holes, and the cover plate and the housing are detachably connected through fasteners penetrating the mounting holes.

2. The filter device of claim 1, wherein, The filter assembly is arranged near the air inlet in the housing, and a wind guide cover is arranged between the filter assembly and the air outlet, the inner diameter of the wind guide cover gradually decreases along the gas flow direction.

3. The filter device of claim 1, wherein, The filter device further comprises an ash removal assembly arranged on one side of the filter assembly close to the air inlet, the ash removal assembly comprises a driving member and a scraper detachably mounted on the driving member, and the driving member drives the scraper to rotate to remove dust on the filter assembly.

4. The filter device of claim 3, wherein, The length of the scraper is configured as half of the height of the housing.

5. The filter device of claim 3, wherein, The driving member comprises: a mounting seat, two connecting arms of the mounting seat are fixed on the inner wall of the housing; a fan, which rotates around a rotating shaft, one end of the rotating shaft is rotationally connected with the mounting seat; and a mounting rack, which is arranged on the other end of the rotating shaft, the scraper is pluggably mounted on the mounting rack, the fan can rotate under the driving of air in the air inlet and drive the scraper to rotate through the mounting rack.

6. The filter device of claim 5, wherein, The mounting rack is provided with a receiving groove, the cross section of the receiving groove is configured as T-shaped, and the cross section of one end of the scraper close to the mounting rack is configured as H-shaped and is insertedly connected with the receiving groove.

7. The filter device of claim 3, wherein The housing is further provided with an ash storage hopper, which is arranged below the ash removal assembly.

8. The filter device of claim 7, wherein, A flap ash discharge valve is mounted on the bottom of the ash storage hopper.

9. The filter device of claim 1, wherein, The edge of the maintenance opening is formed with a first step, the cover plate is provided with a second step matched with the first step, and when the cover plate covers the maintenance opening, the second step abuts against the first step.

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