Ventilation device for preventing gas overrun in coal mine

Abstract

The utility model relates to the technical field of coal mine ventilation, specifically relates to a ventilation device for preventing coal mine gas overrun, including box, knock assembly and dust removal mechanism, dust removal mechanism includes installation guide rail, driving part, screw rod, ball screw nut pair, sliding seat, mounting arm and scraper, the inside of box is provided with filter cavity, the inside of filter cavity is equipped with filter screen both in front and back, after knocking off the dust attached on the filter screen by knock assembly, the cover of dust outlet is taken off, starts driving part, drives screw rod rotation, because ball screw nut pair is connected with sliding seat to drive sliding seat to slide on installation guide rail, and then the scraper is driven to slide on the inner bottom of filter cavity through mounting arm, and then the dust accumulated on the bottom of filter cavity is cleaned, avoids dust to be raised again and be attached on the filter screen, and the influence of the filtering effect of filter screen is caused.

Description

Technical Field

[0001] This utility model relates to the field of coal mine ventilation technology, and in particular to a ventilation device for preventing coal mine gas from exceeding the limit. Background Technology

[0002] Existing ventilation devices for preventing excessive gas levels in coal mines often experience dust buildup on the filter screen during operation. Excessive dust can clog the filter screen, resulting in poor gas purification and filtration efficiency. Furthermore, frequent filter screen replacements waste significant time and manpower, reducing work efficiency.

[0003] To address the above issues, patent document CN221703759U discloses a ventilation device for preventing excessive methane levels in coal mines. The device includes a housing with an internal striking assembly comprising a motor, a mounting bracket, baffles, and striking blocks. The motor is fixedly mounted on the top of the housing, and a rotating shaft is rotatably connected to the internal cavity via bearings. By activating the striking assembly and starting the motor, when the two rotating blocks abut against the two baffles, the mounting bracket displaces either the first or second filter screen. When the two rotating blocks move away from both baffles, the first or second filter screen resets under the action of a return spring. This reset process causes vibration in the mounting bracket, dislodging dust from the first or second filter screen and facilitating cleaning, thus improving the filtration efficiency of both screens.

[0004] However, existing ventilation devices for preventing coal mine gas exceedances cannot clean the dust knocked off the filter screen by the knocking components during actual use. Under the airflow disturbance generated by the operation of the ventilation device, some dust may be stirred up again and adhere to the filter screen, affecting the filtration effect of the filter screen. Utility Model Content

[0005] The purpose of this utility model is to provide a ventilation device for preventing coal mine gas exceedances. It solves the problem that existing ventilation devices for preventing coal mine gas exceedances cannot clean the dust knocked off the filter screen by the striking component during actual use. Under the airflow disturbance generated by the operation of the ventilation device, some dust may be raised again and adhere to the filter screen, affecting the filtration effect of the filter screen.

[0006] To achieve the above objectives, this utility model provides a ventilation device for preventing coal mine gas exceedances, comprising a housing, a striking assembly, and a dust removal mechanism. The housing has a filter chamber inside, and two filter screens are installed inside the filter chamber, one at the front and one at the back. Each filter screen is mounted on the inner wall of the filter chamber by multiple springs on both sides. The housing also has the striking assembly located between the two filter screens, and the output end of the striking assembly corresponds to the surface of the filter screen.

[0007] The dust removal mechanism includes a mounting rail, a drive component, a threaded rod, a ball screw nut pair, a sliding seat, a mounting arm, and a scraper. A dust discharge port is located at the bottom of the end of the filter chamber furthest from the air inlet of the housing. A cover plate is provided at the dust discharge port. Gaps are provided between the two filter screens and the inner bottom of the filter chamber. The mounting rail is mounted on the inner wall of the gaps. The threaded rod is rotatably mounted inside the mounting rail. The sliding seat is slidably mounted on the mounting rail. The ball screw nut pair is mounted on the threaded rod and connected to the sliding seat. One end of the mounting arm is connected to the sliding seat, and the other end of the mounting arm is equipped with a scraper. The bottom surface of the scraper is in contact with the inner bottom of the filter chamber. The drive component is located at the end of the mounting rail, and the output end of the drive component is connected to the threaded rod.

[0008] The mounting guide rail has a fixed wing plate on the inner side wall near the gap, and the fixed wing plate is connected to the inner side wall of the filter chamber.

[0009] The mounting arm has a first fixing block at one end and a second fixing block at the other end. The first fixing block is connected to the scraper, and the second fixing block is connected to the sliding seat.

[0010] The mounting guide rail is provided with a protective plate on the inner side wall away from the filter chamber, and a through groove is provided on the sliding seat, with the protective plate passing through the through groove.

[0011] The protective plate has mounting blocks on both sides at both ends, and the mounting blocks are connected to the side of the end of the mounting guide rail.

[0012] This utility model discloses a ventilation device for preventing excessive gas levels in coal mines, comprising a housing, a knocking assembly, and a dust removal mechanism. The dust removal mechanism includes a mounting rail, a drive component, a threaded rod, a ball screw nut assembly, a sliding seat, a mounting arm, and a scraper. The housing contains a filter chamber, with filter screens installed at both the front and rear. Each filter screen is mounted on its inner sidewall via multiple springs. After the knocking assembly knocks off the dust adhering to the filter screens, the cover plate at the dust outlet is removed, and the drive component is activated, rotating the threaded rod. Since the ball screw nut assembly is connected to the sliding seat, the sliding seat slides on the mounting rail. This, in turn, causes the scraper to slide at the bottom of the filter chamber via the mounting arm, thus cleaning the dust accumulated at the bottom of the filter chamber and preventing the dust from being stirred up again and adhering to the filter screens, thus affecting the filtering effect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a cross-sectional structural diagram of the box provided by this utility model.

[0015] Figure 2 This is a schematic diagram of the dust removal mechanism provided by this utility model.

[0016] Figure 3 This utility model provides Figure 2 Enlarged view of the local structure at point A.

[0017] Figure 4 This is a schematic diagram of the structure of the mounting rail provided by this utility model when no protective plate is installed.

[0018] 101-Box body, 102-Actuating assembly, 103-Mounting guide rail, 104-Drive component, 105-Threaded rod, 106-Ball screw nut pair, 107-Sliding seat, 108-Mounting arm, 109-Scraper, 110-Filter chamber, 111-Filter screen, 112-Spring, 113-Dust outlet, 114-Cover plate, 115-Gap, 116-Fixed wing plate, 117-First fixing block, 118-Second fixing block, 119-Protective plate, 120-Through groove, 121-Mounting block. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1 to 4 ,in Figure 1 This is a cross-sectional structural diagram of the box. Figure 2 This is a structural diagram of the dust removal mechanism. Figure 3 yes Figure 2 Enlarged view of the local structure at point A. Figure 4 This is a structural diagram of the guide rail without a protective plate installed.

[0021] This utility model provides a ventilation device for preventing excessive methane levels in coal mines, comprising a housing 101, a striking assembly 102, and a dust removal mechanism. The dust removal mechanism includes a mounting guide rail 103, a driving component 104, a threaded rod 105, a ball screw and nut assembly 106, a sliding seat 107, a mounting arm 108, and a scraper 109. This solution addresses the problem that existing ventilation devices for preventing excessive methane levels in coal mines cannot effectively clean the dust knocked off the filter screen 111 by the striking assembly 102 during actual use. Furthermore, under the airflow disturbance generated during the operation of the ventilation device, some dust may be re-raised and adhere to the filter screen 111, affecting its filtration efficiency. Therefore, this solution can be applied to the structure of ventilation devices for preventing excessive methane levels in coal mines.

[0022] In this specific embodiment, the housing 101 has a filter chamber 110 inside. Two filter screens 111 are installed inside the filter chamber 110, one at the front and one at the back. Each filter screen 111 is mounted on its inner sidewall by multiple springs 112 on both sides. The housing 101 also has a striking assembly 102 located between the two filter screens 111. The output end of the striking assembly 102 corresponds to the surface of the filter screen 111. Gas from the coal mine enters the housing 101 for filtration, thereby reducing the amount of gas extracted. During the process, dust and pollutants are present. By setting the tapping component 102, the two filter screens 111 are tapped, causing the filter screens 111 to vibrate inside the filter chamber 110 under the action of the spring 112. This causes the dust on the filter screens 111 to fall off due to vibration, preventing dust accumulation from affecting the filtration effect of the filter screens 111. Here, the specific structure of the component in the housing 101 that adsorbs gas dust and the tapping component 102 are both structures disclosed in the prior art, so they will not be described in detail in this technical solution.

[0023] The filter chamber 110 has a dust outlet 113 at the bottom of the end away from the air inlet of the housing 101. A cover plate 114 is provided at the dust outlet 113. Gaps 115 are provided between the two filter screens 111 and the inner bottom of the filter chamber 110. A mounting rail 103 is mounted on the inner wall of the gaps 115. A threaded rod 105 is rotatably mounted inside the mounting rail 103. A sliding seat 107 is slidably mounted on the mounting rail 103. A ball screw nut pair 106 is provided on the threaded rod 105 and connected to the sliding seat 107. One end of the mounting arm 108 is connected to the sliding seat 107, and the other end of the mounting arm 108 is provided with a scraper 109. The bottom surface of the scraper 109 is in contact with the inner bottom of the filter chamber 110. The guide rail 103 is equipped with a drive member 104 at its end. The output end of the drive member 104 is connected to the threaded rod 105. After the dust adhering to the filter screen 111 is knocked off by the tapping component 102, the cover plate 114 at the dust outlet 113 is removed, and the drive member 104 is activated to drive the threaded rod 105 to rotate. Since the ball screw nut pair 106 is connected to the sliding seat 107, the sliding seat 107 is driven to slide on the mounting guide rail 103. Then, the scraper 109 is driven to slide at the bottom of the filter chamber 110 through the mounting arm 108, thereby completing the cleaning of the dust accumulated at the bottom of the filter chamber 110 and preventing the dust from being stirred up again and adhering to the filter screen 111, which would affect the filtration effect of the filter screen 111. Here, the drive member 104 is preferably a servo motor.

[0024] Secondly, a fixing wing plate 116 is provided on the inner side wall of the mounting guide rail 103 near the gap 115. The fixing wing plate 116 is connected to the inner side wall of the filter chamber 110. The mounting guide rail 103 is installed by setting the fixing wing plate 116.

[0025] Meanwhile, a first fixing block 117 is provided at one end of the mounting arm 108, and a second fixing block 118 is provided at the other end of the mounting arm 108. The first fixing block 117 is connected to the scraper 109, and the second fixing block 118 is connected to the sliding seat 107. The arrangement of the first fixing block 117 and the second fixing block 118 facilitates the connection between the mounting arm 108, the sliding seat 107, and the scraper 109.

[0026] In addition, a protective plate 119 is provided on the inner side of the mounting guide rail 103 away from the filter chamber 110, and a through groove 120 is provided on the sliding seat 107. The protective plate 119 passes through the through groove 120. The protective plate 119 protects the end face of the mounting guide rail 103 and prevents dust from affecting the movement of the ball screw nut pair 106 on the threaded rod 105.

[0027] Furthermore, mounting blocks 121 are provided on both sides of the protective plate 119. The mounting blocks 121 are connected to the side of the end of the mounting guide rail 103. The installation of the protective plate 119 is completed by setting the mounting blocks 121.

[0028] When using the ventilation device of this utility model for preventing coal mine gas exceedances, the gas in the coal mine enters the interior of the housing 101 for filtration, thereby reducing the presence of dust and pollutants during gas extraction. Furthermore, the striking component 102 strikes the two filter screens 111, causing them to vibrate within the filter chamber 110 under the action of the spring 112. This vibration dislodges dust from the filter screens 111, preventing dust accumulation from affecting their filtration efficiency. Additionally, when the striking component 102 is used to strike the filter screens 111... After the dust adhering to the filter is knocked off, the cover plate 114 at the dust outlet 113 is removed, the drive component 104 is activated, and the threaded rod 105 is rotated. Since the ball screw nut pair 106 is connected to the sliding seat 107, the sliding seat 107 is driven to slide on the mounting guide rail 103. Then, the scraper 109 is driven to slide at the bottom of the filter chamber 110 through the mounting arm 108, thereby completing the cleaning of the dust accumulated at the bottom of the filter chamber 110, preventing the dust from being stirred up again and adhering to the filter screen 111, which would affect the filtration effect of the filter screen 111.

[0029] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A ventilation device for preventing excessive gas levels in coal mines, comprising a housing and a striking assembly, wherein the housing has a filter chamber inside, and two filter screens are installed inside the filter chamber, one at the front and one at the back. Each filter screen is mounted on its two sides to the inner wall of the filter chamber by multiple springs. The striking assembly is also mounted on the housing between the two filter screens, and the output end of the striking assembly corresponds to the surface of the filter screen. The device is characterized in that... It also includes dust removal mechanisms; The dust removal mechanism includes a mounting rail, a drive component, a threaded rod, a ball screw nut pair, a sliding seat, a mounting arm, and a scraper. A dust discharge port is located at the bottom of the end of the filter chamber furthest from the air inlet of the housing. A cover plate is provided at the dust discharge port. Gaps are provided between the two filter screens and the inner bottom of the filter chamber. The mounting rail is mounted on the inner wall of the gaps. The threaded rod is rotatably mounted inside the mounting rail. The sliding seat is slidably mounted on the mounting rail. The ball screw nut pair is mounted on the threaded rod and connected to the sliding seat. One end of the mounting arm is connected to the sliding seat, and the other end of the mounting arm is equipped with a scraper. The bottom surface of the scraper is in contact with the inner bottom of the filter chamber. The drive component is located at the end of the mounting rail, and the output end of the drive component is connected to the threaded rod.

2. The ventilation device for preventing coal mine gas exceedances as described in claim 1, characterized in that, A fixing wing plate is provided on the inner side wall of the mounting guide rail near the gap, and the fixing wing plate is connected to the inner side wall of the filter chamber.

3. The ventilation device for preventing coal mine gas exceedances as described in claim 2, characterized in that, One end of the mounting arm is provided with a first fixing block, and the other end of the mounting arm is provided with a second fixing block. The first fixing block is connected to the scraper, and the second fixing block is connected to the sliding seat.

4. The ventilation device for preventing coal mine gas exceedances as described in claim 3, characterized in that, A protective plate is provided on the inner side of the mounting guide rail away from the filter chamber, and a through groove is provided on the sliding seat, through which the protective plate passes.

5. The ventilation device for preventing coal mine gas exceedances as described in claim 4, characterized in that, Mounting blocks are provided on both sides of the protective plate, and the mounting blocks are connected to the side of the end of the mounting guide rail.

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