Coal mine ventilation dust prevention device

Abstract

The utility model discloses a coal mine ventilation dust prevention device relates to coal mine ventilation equipment technical field, and the device includes second connecting pipe, first connecting pipe, fixed component, self -cleaning subassembly and spacing component, and the fixed component includes first fixed block and the second fixed block of slidable, spacing component can form mechanical spacing to maintain the unlocking state after unlocking second fixed block, and this spacing component includes first connecting rod, second spacing block, spacing ring to the first spacing block driven by first spring, when pulling first connecting rod, first spacing block automatically extends and is connected in second spacing block with spacing ring between, realizes self -locking. The utility model has solved the problem that the existing locking mechanism needs to continue to exert force after unlocking, and the inconvenient operation has the potential safety hazard, reaches the technical effect of safe and convenient filter core replacement, and can prolong the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety equipment technology, and in particular to a coal mine ventilation and dust prevention device. Background Technology

[0002] In the underground coal mine working environment, efficient ventilation and effective dust control are crucial for ensuring the health of miners and the safety of mine production. Therefore, using dust suppression devices in the ventilation system to filter coal dust from the air is an indispensable technical means. These devices typically have multi-stage filter cartridges built in to capture dust particles of different sizes.

[0003] As operating time increases, these filter cartridges gradually become clogged due to the adsorption of large amounts of dust, leading to increased ventilation resistance and a significant decrease in ventilation efficiency. To restore their performance, saturated filter cartridges must be replaced periodically. Therefore, existing ventilation and dust control devices typically install filter cartridges in replaceable modules or frames, and secure these modules to the main body of the device using some form of locking mechanism to ensure airtightness and structural stability.

[0004] When replacing filter cartridges, operators need to manually unlock the locking mechanism before they can pull the module containing the old filter cartridge out of the device. Existing locking mechanisms often use spring-return pins or latches, requiring the operator to maintain pressure after pulling or pressing the unlocking component to keep the device unlocked. However, replacing filter cartridges, especially larger and heavier modules, often requires the operator to use both hands to safely and smoothly complete the pulling and loading process.

[0005] This leads to an operational contradiction and safety hazard: it is difficult for operators to simultaneously keep the unlocking mechanism open and replace the filter cartridge with both hands. Once the operator releases the unlocking mechanism to access the filter cartridge module, the locking mechanism's pin or latch will instantly reset under spring force. This unexpected reset not only hinders the removal or installation of the filter cartridge module, increasing the complexity of the operation, but more seriously, during the replacement process, the sudden rebound of the locking mechanism may cause impact damage to components, or even pinch the operator's fingers.

[0006] Therefore, this utility model proposes a coal mine ventilation and dust control device to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above deficiencies, this utility model provides a coal mine ventilation and dust prevention device, which aims to improve the structural defects of the existing locking device used for replacing filter elements, which cannot reliably maintain the unlocked state after unlocking, resulting in inconvenience in operation and safety hazards.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a coal mine ventilation and dust prevention device, comprising: a second connecting pipe, a first connecting pipe fixedly connected to the front end of the second connecting pipe, a fixing component fixedly connected to the outer wall of the second connecting pipe, a self-cleaning component located inside the second connecting pipe; and a limiting component.

[0009] The fixing component includes a first fixing block and at least one second fixing block, wherein the second fixing block is slidably fitted inside the first fixing block.

[0010] The limiting component is used to lock or unlock the parts within the fixing component, and can automatically form a mechanical limit to maintain the unlocked state after the second fixing block is unlocked.

[0011] Preferably, the limiting component includes: a third fixing block fixedly connected to the upper surface of the first fixing block; a first fixing tube fixedly connected inside the third fixing block; a first connecting rod slidably passing through the first fixing tube; a second limiting block fixedly connected to the end of the first connecting rod; a limiting ring fixedly connected to the outer wall of the first connecting rod; and a second spring sleeved on the first connecting rod and abutting between the limiting ring and the inner end wall of the first fixing tube; a second fixing tube fixedly connected to the side wall of the first fixing tube; a second connecting rod slidably connected inside the second fixing tube; a first limiting block fixedly connected to one end of the second connecting rod; and a first spring sleeved on the second connecting rod and abutting between the first limiting block and the inner end wall of the second fixing tube, the first spring driving the second connecting rod so that the first limiting block extends out and engages between the second limiting block and the limiting ring.

[0012] Preferably, the self-cleaning component includes: a fixed shaft rotatably connected inside the second connecting pipe, a fan blade fixedly connected to the front end of the fixed shaft, and a scraper fixedly connected to the rear end of the fixed shaft.

[0013] Preferably, the fixed shaft is supported by a fourth fixing block fixed inside the second connecting pipe.

[0014] Preferably, a fixing plate is fixedly connected to the fixing shaft between the fan blade and the scraper.

[0015] Preferably, a filter pad is fixedly connected to the inner side of the second fixing block.

[0016] Preferably, the filter pad includes a first filter pad, a second filter pad, and a third filter pad, wherein the first filter pad is disposed adjacent to the scraper of the self-cleaning component.

[0017] Preferably, the device includes three second fixing blocks, and each second fixing block is fixedly connected to one of the first filter pad, the second filter pad, and the third filter pad.

[0018] Preferably, a conical flow guide is fixedly connected inside the first connecting pipe.

[0019] Preferably, a spiral channel is fixedly connected to the air outlet of the conical air guide shroud.

[0020] This utility model has the following beneficial effects: 1. In this utility model, by setting a limiting component, after the first connecting rod is pulled to unlock the second fixing block, the first limiting block is automatically engaged between the second limiting block and the limiting ring by the first spring to form a self-locking structure. This solves the problem in the prior art that the filter replacement device has no reliable holding mechanism after unlocking, and the locking rod is easily reset due to accidental contact or vibration, which may injure the operator or damage the filter. This achieves the technical effect of safely and reliably maintaining the device in the unlocked state, greatly improving the operational safety and convenience during the filter replacement process.

[0021] 2. In this utility model, by setting a self-cleaning component, the airflow entering the device impacts the fan blades, driving the fixed shaft and the scraper at the rear end to rotate synchronously, continuously scraping the windward surface of the first filter pad, which serves as the first stage of filtration. This solves the problem in the prior art where the filter element surface of the filtration device is easily clogged by large particles of dust, leading to a rapid increase in ventilation resistance and the need for frequent shutdowns to replace or clean the filter element. It achieves the technical effect of using the airflow's own energy to continuously clean the filter element online, effectively delaying filter element clogging, ensuring the long-term stable ventilation efficiency of the device, and reducing the maintenance frequency.

[0022] 3. In this utility model, by setting a conical guide shroud at the air inlet and a spiral channel at the outlet of the guide shroud, the airflow entering the device is gathered, regulated, and induced to form a stable rotating airflow. This solves the problem in the prior art where the airflow directly enters the device and its morphology is disordered, resulting in excessive local wind resistance and failure to effectively utilize air kinetic energy. This achieves the technical effect of optimizing the airflow, not only reducing the overall wind resistance, but also providing a stable and efficient driving force for the fan blades of the self-cleaning component, thus improving the overall energy utilization efficiency of the device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a coal mine ventilation and dust prevention device proposed in this utility model; Figure 2 This is a schematic diagram of the spiral channel section of a coal mine ventilation and dust prevention device proposed in this utility model; Figure 3This is a schematic diagram of the third filter pad portion of a coal mine ventilation and dust prevention device proposed in this utility model. Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the second limiting block of a coal mine ventilation and dust prevention device proposed in this utility model.

[0024] Legend: 1. Conical air guide; 2. First connecting pipe; 3. Second connecting pipe; 4. Fixing assembly; 401. First fixing block; 402. Second fixing block; 403. Third fixing block; 5. Limiting assembly; 501. First connecting rod; 502. First fixing pipe; 503. Second fixing pipe; 504. Second connecting rod; 505. First spring; 506. First limiting block; 507. Second limiting block; 508. Limiting ring; 509. Second spring; 6. Spiral channel; 7. Self-cleaning assembly; 701. Fan blade; 702. Fixing shaft; 703. Fixing plate; 704. Fourth fixing block; 705. Scraper; 8. First filter pad; 9. Second filter pad; 10. Third filter pad. Detailed Implementation

[0025] Please refer to Figures 1 to 5 This utility model provides a coal mine ventilation and dust prevention device, which aims to solve the structural defect problem in the prior art where the locking device used for replacing filter elements cannot reliably maintain the unlocked state after unlocking, resulting in inconvenience in operation and safety hazards.

[0026] The coal mine ventilation and dust prevention device includes a second connecting pipe 3 as the main frame, a first connecting pipe 2 fixedly connected to the front end of the second connecting pipe 3, a fixing component 4 fixedly connected to the outer wall of the second connecting pipe 3, a self-cleaning component 7 located inside the second connecting pipe 3, and a limiting component 5 for locking or unlocking the internal components of the fixing component 4. Specifically, the fixing component 4 includes a first fixing block 401 and at least one second fixing block 402. The second fixing block 402 slides with the interior of the first fixing block 401. This structure allows the second fixing block 402 to be smoothly inserted into or removed from the first fixing block 401, providing a basic movement relationship for subsequent filter replacement. The limiting component 5 can automatically form a mechanical limit to maintain the unlocked state after the second fixing block 402 is unlocked; the detailed structure of the limiting component 5 to achieve this function is as follows: The third fixing block 403, which is fixedly connected to the upper surface of the first fixing block 401, serves as the mounting base for the limiting component 5. The first fixing tube 502, which is fixedly connected inside the third fixing block 403, is the main motion guide structure. The first connecting rod 501 slides through the first fixing tube 502. The end of the first connecting rod 501 is fixedly connected to the second limiting block 507. The second limiting block 507 directly interacts with the second fixing block 402 to achieve locking or unlocking. The outer wall of the first connecting rod 501 is fixedly connected to the limiting ring 508. The second spring 509, which is sleeved on the first connecting rod 501, abuts against the limiting ring 508 and the inner end wall of the first fixing tube 502. The second spring 509 always provides the driving force to reset the first connecting rod 501. To achieve self-locking after unlocking, a second fixed tube 503 is fixedly connected to the side wall of the first fixed tube 502. A second connecting rod 504 is slidably connected inside the second fixed tube 503. A first limiting block 506 is fixedly connected to one end of the second connecting rod 504. A first spring 505 is also provided inside the second fixed tube 503, sleeved on the second connecting rod 504 and abutting between one side of the first limiting block 506 and the inner end wall of the second fixed tube 503. When the first connecting rod 501 is pulled to disengage the second limiting block 507 from the second fixed block 402, the limiting ring 508 will pass the position of the first limiting block 506. At this time, driven by the first spring 505, the second connecting rod 504 drives the first limiting block 506 to automatically extend and engage between the already moved second limiting block 507 and the limiting ring 508, thereby preventing the first connecting rod 501 from instantaneously resetting under the action of the second spring 509, and reliably maintaining the unlocked state of the entire device.

[0027] The self-cleaning component 7 includes a fixed shaft 702, with a fan blade 701 fixedly connected to the front end of the fixed shaft 702 for converting the kinetic energy of the airflow into rotational kinetic energy, and a scraper 705 fixedly connected to the rear end of the fixed shaft 702 for scraping off dust; a fixed plate 703 for reinforcement and stabilization is also fixedly connected to the fixed shaft 702 between the fan blade 701 and the scraper 705. The self-cleaning component 7 is installed by rotating and supporting the fixed shaft 702 through the fourth fixing block 704 fixed inside the second connecting pipe 3. This connection method ensures that the fixed shaft 702 can rotate stably around its own central axis. In the assembled state, the entire self-cleaning component 7 is located inside the second connecting pipe 3, and the end of the scraper 705 is adjacent to the surface of the filter pad, which will be described later. When the airflow containing dust passes through the second connecting pipe 3, the airflow impacts the fan blade 701, driving the fan blade 701, along with the fixed shaft 702, the fixed plate 703, and the scraper 705 to rotate synchronously. The rotating scraper 705 periodically sweeps across the windward side of the filter pad, promptly scraping away large dust particles attached to it, thereby ensuring the permeability of the filter pad and extending the effective working time of the device.

[0028] In a preferred embodiment, a filter pad is fixedly connected to the inner side of the second fixing block 402 to achieve dust filtration.

[0029] Furthermore, the filter pad specifically includes a first filter pad 8, a second filter pad 9, and a third filter pad 10 with different filtration precisions. To achieve graded filtration and independent replacement, the device includes three second fixing blocks 402, and each second fixing block 402 is firmly fixedly connected to one of the first filter pad 8, the second filter pad 9, and the third filter pad 10, forming an independent filter unit that can be quickly removed and replaced.

[0030] The first filter pad 8, which serves as the coarse filtration stage, is positioned adjacent to the scraper 705 of the self-cleaning assembly 7, enabling the scraper 705 to effectively clean the first filter pad 8, which is the first to come into contact with dust.

[0031] As another preferred embodiment, in order to optimize the shape of the intake airflow, a conical guide shroud 1 is fixedly connected inside the first connecting pipe 2. The conical structure of the conical guide shroud 1 can gather and regulate the incoming airflow, reducing the inlet resistance of the airflow. In order to further guide the airflow, a spiral channel 6 is fixedly connected at the air outlet of the conical guide shroud 1. The inner wall of the spiral channel 6 forms a spiral guide surface. When the airflow passes through, it will move along the spiral path, thereby forming a stable rotating airflow.

[0032] Working principle: Under normal operating conditions, the airflow containing dust enters the device through the first connecting pipe 2. After being collected by the conical guide shroud 1 and guided by the spiral channel 6, it forms a rotating airflow. The rotating airflow impacts the fan blades 701 of the self-cleaning component 7, driving the fan blades 701 to drive the fixed shaft 702 to rotate at high speed. The scraper 705 at the rear end of the fixed shaft 702 rotates synchronously and continuously scrapes the windward side of the first filter pad 8 to remove the attached large dust particles. The airflow that has been initially cleaned then passes through the first filter pad 8, the second filter pad 9 and the third filter pad 10 in sequence to complete the filtration and purification.

[0033] When the filter pad needs to be replaced, the first connecting rod 501 of the limiting assembly 5 is pulled outward. The first connecting rod 501 drives the second limiting block 507 to move and disengage from the second fixing block 402. At the same time, the limiting ring 508 on the first connecting rod 501 will pass the position of the first limiting block 506. At this time, under the elastic force of the first spring 505, the second connecting rod 504 is pushed out, so that the first limiting block 506 automatically engages between the second limiting block 507 and the limiting ring 508, forming a stable mechanical limit and preventing the first connecting rod 501 from resetting under the action of the second spring 509, thereby reliably keeping the device in the unlocked state.

[0034] In this unlocked state, the second fixing block 402, which contains the filter pad to be replaced, can be smoothly pulled out from the first fixing block 401. After replacement, it can be pushed back to its original position. After the replacement operation is completed, simply press the first connecting rod 501 inward, and the second limiting block 507 will push the first limiting block 506, forcing the first limiting block 506 to retract into the second fixing tube 503 against the elastic force of the first spring 505. At this time, the first connecting rod 501 automatically returns to the locked position under the restoring force of the second spring 509, and the second limiting block 507 re-engages with the second fixing block 402 to complete the locking.

Claims

1. A coal mine ventilation and dust control device, comprising: Second connecting pipe (3); The first connecting pipe (2) is fixedly connected to the front end of the second connecting pipe (3); Fixing component (4), which is fixedly connected to the outer wall of the second connecting pipe (3); The self-cleaning component (7) is located inside the second connecting pipe (3); And a limiting component (5), which is used to lock or unlock the components within the fixing component (4); The fixing component (4) includes: a first fixing block (401) and at least one second fixing block (402), wherein the second fixing block (402) is slidably fitted inside the first fixing block (401), characterized in that: The limiting component (5) can automatically form a mechanical limit to maintain the unlocked state after the second fixing block (402) is unlocked; The limiting component (5) includes: a third fixing block (403) fixedly connected to the upper surface of the first fixing block (401); a first fixing tube (502) fixedly connected to the inside of the third fixing block (403); a first connecting rod (501) slidably passing through the first fixing tube (502); a second limiting block (507) fixedly connected to the end of the first connecting rod (501); a limiting ring (508) fixedly connected to the outer wall of the first connecting rod (501); and a second spring (509) sleeved on the first connecting rod (501) and abutting between the limiting ring (508) and the inner end wall of the first fixing tube (502). The side wall of the first fixing tube (502) is fixedly connected to the second fixing tube (503), and the second fixing tube (503) is slidably connected to the second connecting rod (504). One end of the second connecting rod (504) is fixedly connected to the first limiting block (506). The second fixing tube (503) is also provided with a first spring (505) sleeved on the second connecting rod (504) and abutting between the first limiting block (506) and the inner end wall of the second fixing tube (503). The first spring (505) is used to drive the second connecting rod (504) so ​​that the first limiting block (506) extends out and is locked between the second limiting block (507) and the limiting ring (508).

2. The coal mine ventilation and dust control device according to claim 1, characterized in that, The self-cleaning component (7) includes: a fixed shaft (702) rotatably connected inside the second connecting pipe (3), a fan blade (701) fixedly connected to the front end of the fixed shaft (702), and a scraper (705) fixedly connected to the rear end of the fixed shaft (702).

3. A coal mine ventilation and dust control device according to claim 2, characterized in that, The fourth fixing block (704) fixed inside the second connecting pipe (3) supports the fixing shaft (702).

4. A coal mine ventilation and dust control device according to claim 2, characterized in that, A fixing plate (703) is fixedly connected to the fixing shaft (702) between the fan blade (701) and the scraper (705).

5. A coal mine ventilation and dust control device according to claim 1, characterized in that, A filter pad is fixedly connected to the inner side of the second fixing block (402).

6. A coal mine ventilation and dust control device according to claim 5, characterized in that, The filter pads include a first filter pad (8), a second filter pad (9) and a third filter pad (10), with the first filter pad (8) disposed adjacent to the scraper (705) of the self-cleaning assembly (7).

7. A coal mine ventilation and dust control device according to claim 6, characterized in that, The device includes three second fixing blocks (402), and each second fixing block (402) is fixedly connected to one of the first filter pad (8), the second filter pad (9), and the third filter pad (10).

8. A coal mine ventilation and dust control device according to claim 1, characterized in that, The first connecting pipe (2) is fixedly connected to a conical guide shield (1).

9. A coal mine ventilation and dust control device according to claim 8, characterized in that, A spiral channel (6) is fixedly connected to the air outlet of the conical air guide (1).

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