Movable dust purifier for coal mine

Abstract

The invention relates to the technical field of dust purifiers, in particular to a coal mine movable dust purifier which comprises a safety helmet, a filter assembly is arranged on the lower side of the safety helmet, and a dust removal assembly is arranged at the rear end of the safety helmet. The dust removal assembly and the filtering assembly are arranged, the functions of movable air supply, active dust collection, breathing filtering, automatic cleaning and reverse blowing and the like are modularly integrated, the problems of movable dust removal and personal breathing protection are effectively solved, the dust removal assembly is directly installed on the side face of the rail mine car, and the mine car is used for moving and power supply; the problem that large fixed equipment cannot move along with a working face is solved, workers do not need to carry heavy dust removal equipment during use, the dust removal equipment can be lightly installed, the flexibility is enhanced, multiple sets of dust removal units are allowed to be additionally installed on one mine car through the modular design, clean air support can be provided for multiple workers at the same time, and the working efficiency is improved. The dust removal efficiency and the application range are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of dust purifier technology, and in particular to a mobile dust purifier for coal mines. Background Technology

[0002] In underground coal mining operations, large amounts of high-concentration dust are generated during the production process. This dust not only severely pollutes the working environment, but is also the leading cause of occupational diseases such as pneumoconiosis among miners, posing a significant threat to the lives and health of workers.

[0003] Currently, underground mining relies primarily on high-powered, fixed ventilation and dust removal systems to reduce airborne dust concentrations. However, these systems cannot move with the advancing mining face, creating blind spots in dust collection. The ordinary dust masks typically worn by miners have limited filtration efficiency, and the filter material becomes clogged with use, increasing breathing resistance. Workers often unconsciously remove their masks due to feeling stuffy, rendering them ineffective. Therefore, existing technologies suffer from the following prominent problems: 1. There is a lack of efficient local dust purification methods that can closely follow the movement of staff; 2. There is an irreconcilable contradiction between the filtration efficiency and wearing comfort of personal protective equipment. It is impossible to ensure smooth breathing while guaranteeing efficient and continuous filtration, thus making it difficult to achieve truly effective long-term personal protection. To address this, we propose a portable dust purifier for coal mines. Summary of the Invention

[0004] In order to overcome the technical problems existing in the prior art, the present invention provides a mobile dust purifier for coal mines.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a safety helmet, wherein a filter component is provided on the lower side of the safety helmet and a dust removal component is provided at the rear end of the safety helmet; The dust removal assembly includes a first mounting frame, a rotating drum is provided on the side of the first mounting frame, a reset device and a dust suction pipe are provided on the side of the rotating drum, and a dust collector is provided inside the rotating drum. The filter assembly includes a face mask with a slot and a mounting cavity on its side. A filter element block is snapped into the inner wall of the mounting cavity. A cleaning rod is attached to the side of the filter element block. A mating bracket is provided on the side of the filter element block away from the second mounting bracket. A discharge groove penetrating the face mask is provided on the lower part of the wall of the mounting cavity. A storage box is snapped into the lower side of the face mask corresponding to the discharge groove. The face mask has a mating cavity, a connecting groove, a movable cavity, a first guide groove, and a second guide groove inside. A connecting pipe is fixedly installed on the inner wall of the connecting groove. The movable cavity contains a first support cylinder, a piston block, an exhaust pipe, a bracket, a trigger rod, and a second support cylinder. The exhaust pipe is snapped into the movable cavity. The trigger rod is movably installed at the center of the bracket. The second support cylinder is fixedly connected between the trigger rod and the side of the bracket. The side of the bracket has exhaust grooves penetrating it at equal intervals. A one-way valve is fixedly installed inside the second guide groove. A compressed air tank is threaded into the inside of the first guide groove.

[0006] Furthermore, the rotating drum is rotatably mounted on one side of the first mounting frame via a round shaft, the reset device is fixedly mounted on the side of the first mounting frame and fixedly connected to the side of the rotating drum's round shaft, the dust collector is fixedly mounted on the hollow inner side of the rotating drum and extends out through the first mounting frame, and the remaining rotating parts are arranged, and the suction pipe is threaded on the side of the rotating drum.

[0007] Furthermore, the face shield is positioned on the lower side of the safety helmet, and an elastic band is fixedly installed on the side of the face shield. A fixing block is symmetrically fixedly installed on the lower side of the safety helmet corresponding to the position of the face shield. A damping rod is provided on the inner side of the fixing block, and the other end of the damping rod extends to the side of the face shield. The damping rod is rotatably installed on the side of the fixing block via a round shaft. A connecting block is fixedly installed on the other end of the damping rod, and the connecting block is rotatably installed on the side of the face shield via a round shaft passing through it.

[0008] Furthermore, the mating cavity is staggered with the discharge trough, and the wall of the mating cavity is provided with connecting holes that penetrate the mask to the inside of the mounting cavity in a circumferential array. The connecting grooves are symmetrically opened on the wall of the mating cavity away from the cleaning rod. The connecting tube passes through the safety helmet and connects to the other end of the vacuum tube. The connecting tube is fixed to the upper side of the safety helmet by the clamping block.

[0009] Furthermore, a second mounting bracket is fixedly installed on the inner wall of the mounting cavity away from the filter block. A rotating block is rotatably installed at the center of the second mounting bracket and is movably positioned inside the mounting cavity. A cleaning rod is positioned inside the mounting cavity corresponding to the rotating block and is attached to the wall of the mounting cavity. A mating rod is fixedly connected between the cleaning rod and the rotating block.

[0010] Furthermore, the movable cavity is opened on the side of the mask corresponding to the connecting groove position, the first guide groove is opened on the wall of the movable cavity, the second guide groove is opened obliquely on the wall of the first guide groove and the second guide groove penetrates the mask to the inside of the connecting groove, the mating frame is installed on the grooved wall by snap-fit, the mating frame has equidistant exhaust holes on the side near the filter block and the exhaust holes penetrate the mating frame to its hollow interior, and the other end of the exhaust pipe penetrates the mating frame to its interior and is fixedly connected.

[0011] Furthermore, the bracket is fixedly installed on the wall of the movable cavity, the trigger rod is attached to the side of the bracket to cover the exhaust groove, and the second support cylinder is movably sleeved on the side of the trigger rod.

[0012] Furthermore, the compressed air tank is attached to the side and wall of the mask and the first guide groove, the piston block is movably installed inside the movable cavity, and the first support cylinder is fixedly connected between the side of the piston block and the wall of the movable cavity.

[0013] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention effectively solves the problems of mobile dust removal and personal respiratory protection by setting up dust removal components and filtering components, and by modularly integrating functions such as mobile air supply, active dust collection, breathing filtration and automatic cleaning backflushing. In particular, by installing the dust removal components directly on the side of the tracked mine car, and using the mine car for movement and power supply, the problem of large fixed equipment being unable to move with the work face is solved. When using it, the workers do not need to carry heavy dust removal equipment, and can work with light loads to enhance flexibility. The modular design allows multiple dust removal units to be installed on a single mine car, which can provide clean air support for multiple workers at the same time, significantly improving dust removal efficiency and application range.

[0014] 2. This invention achieves dual protection through a combination of respiratory filtration and active dust collection by incorporating a dust collector, a suction pipe, a face mask, and their surrounding components. Specifically, the filter and dust collection components form a dynamic circulation system via the suction pipe and connecting pipe. On one hand, when the worker breathes, the filter block performs the first stage of filtration on the inhaled air; on the other hand, the dust collector continuously operates, actively sucking away dust that attempts to penetrate the face mask or accumulates in the mask's mounting cavity through the connecting pipe and connecting holes inside the face mask, and channeling it into the main suction pipe for further processing. This creates a microenvironment with low dust concentration around the worker's mouth and nose, providing protection far superior to ordinary masks and improving the air quality in the individual's breathing area.

[0015] 3. This invention achieves automatic filter cleaning and dust collection capabilities by incorporating a second mounting bracket, a rotating block, a cleaning rod, and surrounding components. Specifically, it utilizes the suction airflow generated by the dust collector itself as a power source to drive a built-in automatic cleaning mechanism. The airflow propels the rotating block to rotate, which in turn drives the cleaning rod to continuously scrape the surface of the filter block, preventing clogging. Some of the cleaned dust is immediately sucked away, while the rest falls into the storage box at the bottom for collection, achieving dust collection and cleaning, preventing secondary re-entrainment, and allowing the filter block to maintain low breathing resistance and high filtration efficiency during long-term operation. This solves the problem of discomfort caused by filter material clogging, ensuring the durability and effectiveness of protection.

[0016] 4. This invention achieves an intelligent passive back-blowing cleaning mechanism by setting up an active chamber, a first guide groove, and their internal components. Specifically, it utilizes the residual pressure of the suction airflow to automatically accumulate pressure in the active chamber. When the pressure reaches a certain threshold, it triggers a mechanism that causes the gas to be ejected in reverse instantaneously, powerfully back-blowing the filter block to complete deep cleaning and further ensuring the reliability of the device's operation.

[0017] 5. This invention enables an intelligent active back-flushing cleaning mechanism by setting up a compressed air tank. Specifically, when staff feel short of breath, they can manually trigger the compressed air tank for immediate and powerful active back-flushing, ensuring effective maintenance and cleaning of the filter element under any working condition and guaranteeing the safety and health of personnel. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the dust removal mechanism of the present invention; Figure 3 This is a schematic diagram of the structure of the filter assembly of the present invention; Figure 4 This is a partial cross-sectional structural diagram of the present invention; Figure 5 This is a schematic cross-sectional view of another part of the present invention; Figure 6 This is a schematic cross-sectional view of the face mask of the present invention; Figure 7 This is a partial structural schematic diagram of the filter block of the present invention; Figure 8 For the present invention Figure 4 A magnified structural diagram at point A; Figure 9 For the present invention Figure 8 A magnified structural diagram at point B; Figure 10 This is a partial cross-sectional structural diagram of the mounting frame of the present invention.

[0019] The components include: 1. Safety helmet; 2. Dust removal assembly; 21. First mounting bracket; 22. Rotary drum; 23. Reset device; 24. Dust collector; 25. Suction pipe; 3. Filter assembly; 31. Face mask; 311. Elastic band; 312. Slot; 313. Mounting cavity; 32. Fixing block; 321. Damping rod; 322. Connecting block; 33. Filter element block; 34. Second mounting bracket; 341. Rotary block; 342. Matching rod; 343. Cleaning rod; 344. Exhaust... 345. Material trough; 35. Storage box; 36. Mating cavity; 37. Connecting hole; 38. Connecting groove; 39. Connecting pipe; 30. Movable cavity; 31. First support cylinder; 32. Piston block; 33. First guide groove; 344. Second guide groove; 35. Compressed air tank; 36. One-way valve; 37. Mating frame; 38. Exhaust hole; 39. Exhaust pipe; 395. Bracket; 396. Exhaust groove; 397. Trigger rod; 398. Second support cylinder. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0021] Example: Figure 1 As shown, a portable dust purifier for coal mines includes a safety helmet 1, which is a protective helmet commonly used by coal mine workers and can be fitted with accessories such as mining lamps. A filter component 3 for efficient dust removal is provided on the lower side of the safety helmet 1, and a dust removal component 2 for overall dust removal is provided at the rear end of the safety helmet 1.

[0022] The dust removal component 2 can be installed on the side of the rail car. It can be moved and locked by the rail car and then used to assist the staff in dust removal operations. It can be used without manual carrying. The modular design allows for the addition of multiple dust removal components 2 on the side of the mine car. like Figure 1 and Figure 2As shown, the dust removal assembly 2 includes a first mounting frame 21, which is a "C"-shaped frame that can be snapped onto the side of a tracked mine car. A rotating cylinder 22 is located inside the first mounting frame 21, with one side of the cylinder 22 rotatably mounted to the first mounting frame 21 via a circular shaft. The other side of the rotating cylinder 22 is hollow and is an I-shaped cylinder. A reset device 23 is fixedly mounted on the side of the first mounting frame 21 and is fixedly connected to the side of the rotating cylinder 22's circular shaft. The reset device 23 consists of a reset knob. The spring is composed of a torsion spring sleeved on the round shaft of the rotating cylinder 22. One end of the spring is fixed to the round shaft, and the other end is fixed to the first mounting bracket 21, so that the rotating cylinder 22 can automatically return to its original position when it is not under tension. A dust collector 24 is fixedly installed on the hollow inner side of the rotating cylinder 22, and the dust collector 24 extends through the first mounting bracket 21 and is rotatably arranged. The dust collector 24 is an integrated suction dust collection device that can perform efficient dust collection. A suction pipe 25 is threaded on the side of the rotating cylinder 22, and one end of the suction pipe 25 passes through the rotating cylinder 22 to the suction port of the dust collector 24.

[0023] The filter component 3 can be installed on the side of the safety helmet 1. When workers wear the safety helmet 1 for construction, they can wear the filter component 3 over their mouth and nose. The filter component 3 can perform continuous and efficient filtration. It can also work with the dust removal component 2 to perform active dust suction and can perform active backflushing to ensure the dust removal effect and the safety of the workers during construction. like Figures 3 to 10As shown, the filter assembly 3 includes a face mask 31 positioned on the lower side of the safety helmet 1. An elastic band 311 is fixedly installed on the side of the face mask 31. The elastic band 311 is a rectangular band made of elastic material, which can elastically pull the face mask 31 to fit the worker's mouth and nose. A slot 312 is provided on the side of the face mask 31, which allows the face mask 31 to fit the worker's mouth and nose more closely through the elastic band 311. A mounting cavity 313 penetrating the face mask 31 is provided at the center of the wall of the elastic band 311. The mounting cavity 313 is a convex circular cavity. A fixing block 32 is symmetrically fixed on the lower side of the safety helmet 1 corresponding to the position of the face mask 31. The fixing block 32 is a "C"-shaped block. A damping rod 321 is provided on the inner side of the fixing block 32, and the other end of the damping rod 321 extends to... On the side of the face mask 31, a damping rod 321 is rotatably mounted on the side of a fixed block 32 via a round shaft. The damping rod 321 is a freely telescopic rod that can be damped and locked. A connecting block 322 is fixedly mounted on the other end of the damping rod 321, and the connecting block 322 is rotatably mounted on the side of the face mask 31 via a round shaft. The connecting block 322 is a circular block, and a filter element block 33 is snapped into the inner wall of the mounting cavity 313. The filter element block 33 is a circular block made of high-filtration material. Specifically, since both ends of the damping rod 321 are rotatably mounted, the face mask 31 can rotate under the safety helmet 1, and the damping rod 321 can automatically extend and retract, so that the face mask 31 can be restrained and fit snugly against the mouth and nose of the worker. The filter element block 33 can filter dust when the worker breathes. A second mounting bracket 34 is fixedly installed on the inner wall of the mounting cavity 313 away from the filter element block 33. The second mounting bracket 34 is a ring bracket with fan-shaped grooves evenly spaced on its side. A rotating block 341 is rotatably installed at the center of the second mounting bracket 34 and is movably positioned inside the mounting cavity 313. The rotating block 341 is an I-shaped cylindrical block with fan blades evenly spaced on its side. A cleaning rod 343 is provided inside the mounting cavity 313 corresponding to the position of the rotating block 341. The cleaning rod 343 is attached to both the filter element block 33 and the wall of the mounting cavity 313. The cleaning rod 343 is an "L"-shaped wear-resistant rod with wear-resistant bristles evenly spaced on its side. Between the cleaning rod 343 and the rotating block 341... A fixed connection is provided with a mating rod 342, which is a circular rod. A discharge groove 344 penetrating the mask 31 is provided on the lower part of the wall of the mounting cavity 313. The discharge groove 344 is a trapezoidal cavity. A storage box 345 is snapped onto the lower side of the mask 31 corresponding to the discharge groove 344. The storage box 345 is an arc-shaped box with a hollow upper side. A mating cavity 35 is provided inside the mask 31 corresponding to the cleaning rod 343. The mating cavity 35 is a four-fifths annular cavity. The positions of the mating cavities 35 and the discharge groove 344 are staggered. Connecting holes 351 penetrating the mask 31 to the interior of the mounting cavity 313 are equidistantly arranged in a circular array on the wall of the mating cavity 35. The connecting holes 351 are circular holes. A connecting groove 352, penetrating the face mask 31, is symmetrically provided on the wall of the cavity 35 away from the cleaning rod 343. The connecting groove 352 is a cylindrical groove. A connecting pipe 353 is fixedly installed on the inner wall of the connecting groove 352, and the connecting pipe 353 passes through the safety helmet 1 and connects to the other end of the suction pipe 25. The connecting pipe 353 is a three-way pipe with one inlet and two outlets. The connecting pipe 353 is fixed to the upper side of the safety helmet 1 with a retaining block. Specifically, when the dust collector 24 performs suction dust removal, the suction pipe 25 can be used to perform suction operation on the connecting pipe 353. At this time, the face mask 31 is worn over the mouth and nose of the worker. When the worker inhales, the air passes through the filter block 33 to filter dust, and some of it is filtered out. Dust is drawn in by the connecting pipe 353. The dust is drawn from the connecting hole 351 into the mating cavity 35 and then guided to the dust collector 24 through the connecting pipe 353 and the suction pipe 25. The suction pipe 25 can then actively suck up the dust, which can help reduce the dust content during the dust removal operation. At the same time, the suction airflow can blow the rotating block 341 to rotate. The rotating block 341 drives the cleaning rod 343 through the mating rod 342 to perform a scraping and cleaning operation on the side of the filter block 33 and the wall of the mounting cavity 313. Some of the scraped dust is drawn in by the connecting pipe 353 and carried away, while some dust accumulates and falls into the discharge trough 344. From the discharge trough 344, it enters the storage box 345 for collection, ensuring the long-term use of the filter block 33. The face mask 31 has a movable cavity 36 on its side corresponding to the connecting groove 352. The movable cavity 36 is a U-shaped cylindrical cavity. A first guide groove 37 penetrating the face mask 31 is formed on the wall of the movable cavity 36. The first guide groove 37 is a cylindrical groove. A second guide groove 371 is inclinedly formed on the wall of the first guide groove 37 and penetrates the face mask 31 into the connecting groove 352. The second guide groove 371 is a funnel-shaped cylindrical groove. A one-way valve 373 is fixedly installed inside the second guide groove 371. The one-way valve 373 has a filter and self-cleaning function. Any one-way air valve model is acceptable. A compressed air tank 372 is threadedly installed inside the first guide groove 37, and the compressed air tank 372 is fitted against the mask 31 and the side and wall of the first guide groove 37. The compressed air tank 372 is a compressed air tank with a manual release valve. A piston block 362 is movably installed inside the movable cavity 36. The piston block 362 is a round block made of elastic rubber. A first support cylinder 361 is fixedly connected between the side of the piston block 362 and the wall of the movable cavity 36. The first support cylinder 361 is a corrugated cylinder made of elastic material. The filter element block 33 is located away from the second... The mounting bracket 34 has a mating bracket 38 on its side, which is snapped onto the wall of the slot 312. The mating bracket 38 is a hollow circular grid frame. Vent holes 381 are equidistantly provided on the side of the mating bracket 38 near the filter block 33, penetrating the mating bracket 38 into its hollow interior. The vent holes 381 are circular holes. A vent pipe 39 is snapped onto the inside of the movable cavity 36, with its other end penetrating the mating bracket 38 and fixedly connected thereto. The vent pipe 39 is a circular pipe. A bracket is fixedly installed on the wall of the movable cavity 36. 391, the bracket 391 is a circular block, and exhaust grooves 392 are equidistantly opened on the side of the bracket 391. The exhaust grooves 392 are fan-shaped grooves. A trigger rod 393 is movably installed at the center of the bracket 391 and the trigger rod 393 fits against the side of the bracket 391 and covers the exhaust grooves 392. The trigger rod 393 is an I-shaped round rod. A second support cylinder 394 is fixedly connected between the trigger rod 393 and the side of the bracket 391 and the second support cylinder 394 is movably sleeved on the side of the trigger rod 393. The second support cylinder 394 is a corrugated cylinder made of elastic material.Specifically, when the connecting pipe 353 is used for vacuuming, the airflow can be pressurized and guided into the first guiding groove 37 through the second guiding groove 371, and then flow into the movable cavity 36 from the first guiding groove 37. The accumulated airflow pressure gradually increases, causing the piston block 362 to slide and compress the first support cylinder 361 inside the movable cavity 36, deforming it. When the pressure inside the movable cavity 36 is greater than the elastic force of the second support cylinder 394, the gas will pass through the exhaust groove 392 to compress the trigger rod 393 and disengage it from the side of the bracket 391. The released gas can then flow into the exhaust pipe 39 and then be discharged into the mating frame 38 from the exhaust pipe 39 and then out of the exhaust hole. The gas discharged from 381 can be used for backflushing and dust removal of filter element block 33, further ensuring the self-cleaning effect of filter element block 33 and its filtration effect. Similarly, some of the backflushed dust is attracted by the connecting pipe 353, while some falls into the storage box 345 for collection. This ensures effective breathing filtration and dust removal during long-term operation. Additionally, the compressed air tank 372 allows for manual release of compressed gas. The compressed gas directly pushes the trigger rod 393 to open the exhaust slot 392, and the gas is discharged from the exhaust port 381 through the mounting frame 38 for active backflushing, meeting real-time manual requirements.

[0024] Working principle: Before use: First step, attach the first mounting bracket 21 to the side of the railcar. After the safety helmet 1 is put on the worker's head, pull the damping rod 321 to adjust the position of the face mask 31. Then, rotate the two ends of the damping rod 321 to make the face mask 31 fit the worker's mouth and nose. The elastic band 311 completes the elastic and stable wearing. In use: First, carry the mobile position. After wearing, the rail car carries the staff to the designated position. After locking the mine car, turn on the dust collector 24 to start working. The staff moves to the designated working position. At this time, the filter block 33 can pull the dust suction pipe 25. The dust suction pipe 25 drives the rotating drum 22 to rotate automatically to perform the unwinding operation. When the dust suction pipe 25 is not pulled, the rotating drum 22 can perform the reset and rewinding operation of the dust suction pipe 25 through the reset device 23. The second step is normal dust removal operation. When the staff is working normally, they breathe through their mouth and nose, and the dust is filtered through the filter block 33. At this time, some of the dust entering the installation cavity 313 is sucked in by the connecting pipe 353 and passes through the connecting hole 351 into the mating cavity 35. Then, it is sucked into the connecting pipe 353 from the mating cavity 35. After passing through the suction pipe 25, it reaches the dust collector 24 and is sucked in for dust removal. The airflow generated by the suction can drive the rotating block 341 to rotate automatically. The rotating block 341 drives the cleaning rod 343 to rotate and scrape the side of the filter block 33 and the wall of the installation cavity 313 through the mating rod 342 to clean it. After cleaning, some of the dust is sucked in and collected by the connecting pipe 353, and the rest of the dust flows into the discharge trough 344 and falls into the storage box 345 for collection and storage. This ensures that the air breathed by the staff is free of dust and protects the health of the staff. The third step is passive backflushing. When the connecting pipe 353 is vacuuming for a long time, the airflow is guided by the second guide groove 371 and enters the first guide groove 37 through the one-way valve 373 (after filtration). It accumulates in the movable chamber 36, and the pressure of the accumulated gas increases, pushing the piston block 362 to squeeze the first support cylinder 361 to deform. When the gas pressure inside the movable chamber 36 is greater than the elastic force of the second support cylinder 394, the gas can push the trigger rod 393 away from the bracket 391 through the exhaust groove 392. After the exhaust groove 392 is open, the gas is released into the exhaust pipe 39 and flows into the mating frame 38. It is discharged from the exhaust hole 381 to backflush the filter block 33. Similarly, the dust is collected by the connecting pipe 353 and accumulated in the storage box 345. When the gas is released, the piston block 362 is elastically supported and reset by the first support cylinder 361, which can accelerate the flow rate of the gas into the exhaust pipe 39 and increase the force of the gas flowing out of the exhaust hole 381. The fourth step is to actively trigger backflushing. When the staff feels that the breathing effect is not good, the compressed gas inside the compressed gas tank 372 is actively released. The compressed gas can quickly fill the inside of the active chamber 36, push the trigger rod 393 away from the side of the bracket 391, and the exhaust groove 392 is opened. The compressed gas can be pressurized and discharged from the exhaust port 381 through the exhaust pipe 39 and the matching bracket 38, completing the active backflushing cleaning operation of the filter block 33.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A mobile dust purifier for coal mines, comprising a safety helmet (1), a filter assembly (3) provided on the lower side of the safety helmet (1), and a dust removal assembly (2) provided at the rear end of the safety helmet (1). Its features are: The dust removal assembly (2) includes a first mounting frame (21), a rotating drum (22) is provided on the side of the first mounting frame (21), a reset device (23) and a suction pipe (25) are provided on the side of the rotating drum (22), and a dust collector (24) is provided inside the rotating drum (22). The filter assembly (3) includes a mask (31). A slot (312) and a mounting cavity (313) are provided on the side of the mask (31). A filter element block (33) is snapped onto the inner wall of the mounting cavity (313). A cleaning rod (343) is attached to the side of the filter element block (33). A mating frame (38) is provided on the side of the filter element block (33) away from the second mounting frame (34). A discharge groove (344) penetrating the mask (31) is provided on the lower part of the wall of the mounting cavity (313). A storage box (345) is snapped onto the lower side of the mask (31) corresponding to the discharge groove (344). The interior of the mask (31) includes a mating cavity (35), a connecting groove (352), a movable cavity (36), a first guide groove (37), and a second guide groove (371). A connecting pipe (353) is fixedly installed on the inner wall of the groove (352). The interior of the movable cavity (36) is provided with a first support cylinder (361), a piston block (362), an exhaust pipe (39), a bracket (391), a trigger rod (393), and a second support cylinder (394). The exhaust pipe (39) is snapped into the interior of the movable cavity (36). The trigger rod (393) is movably installed at the center of the bracket (391). The second support cylinder (394) is fixedly connected between the trigger rod (393) and the side of the bracket (391). The side of the bracket (391) is provided with exhaust grooves (392) that pass through it at equal intervals. A one-way valve (373) is fixedly installed inside the second guide groove (371). A compressed air tank (372) is threaded inside the first guide groove (37).

2. The portable dust purifier for coal mines according to claim 1, characterized in that: The rotating drum (22) is rotatably mounted on one side through the first mounting frame (21) via a round shaft. The reset device (23) is fixedly mounted on the side of the first mounting frame (21) and fixedly connected to the side of the round shaft of the rotating drum (22). The dust collector (24) is fixedly mounted on the hollow inner side of the rotating drum (22) and extends out through the first mounting frame (21) and is rotatably mounted. The suction pipe (25) is threaded on the side of the rotating drum (22).

3. A portable dust purifier for coal mines according to claim 2, characterized in that: The face shield (31) is located on the lower side of the safety helmet (1). An elastic band (311) is fixedly installed on the side of the face shield (31). A fixing block (32) is symmetrically fixedly installed on the lower side of the safety helmet (1) corresponding to the face shield (31). A damping rod (321) is provided on the inner side of the fixing block (32), and the other end of the damping rod (321) extends to the side of the face shield (31). The damping rod (321) is rotatably installed on the side of the fixing block (32) through a round shaft. A connecting block (322) is fixedly installed on the other end of the damping rod (321), and the connecting block (322) is rotatably installed on the side of the face shield (31) through a round shaft.

4. A portable dust purifier for coal mines according to claim 3, characterized in that: The mating cavity (35) is staggered with the discharge trough (344). The wall of the mating cavity (35) is provided with connecting holes (351) that penetrate the mask (31) to the inside of the mounting cavity (313) in a circular array at equal intervals. The connecting groove (352) is symmetrically opened on the wall of the mating cavity (35) away from the cleaning rod (343). The connecting tube (353) penetrates the safety helmet (1) and connects to the other end of the vacuum tube (25). The connecting tube (353) is attached to the clamping block and fixed on the upper side of the safety helmet (1).

5. A portable dust purifier for coal mines according to claim 4, characterized in that: A second mounting bracket (34) is fixedly installed on the inner wall of the mounting cavity (313) away from the filter block (33). A rotating block (341) is rotatably installed at the center of the second mounting bracket (34) and the rotating block (341) is movably disposed inside the mounting cavity (313). A cleaning rod (343) is disposed inside the mounting cavity (313) corresponding to the rotating block (341) and the cleaning rod (343) is attached to the wall of the mounting cavity (313). A mating rod (342) is fixedly connected between the cleaning rod (343) and the rotating block (341).

6. A portable dust purifier for coal mines according to claim 5, characterized in that: The active cavity (36) is opened on the side of the mask (31) corresponding to the connecting groove (352). The first guide groove (37) is opened on the wall of the active cavity (36). The second guide groove (371) is opened obliquely on the wall of the first guide groove (37) and the second guide groove (371) penetrates the mask (31) to the inside of the connecting groove (352). The mounting bracket (38) is installed on the wall of the slot (312) by snap-fit. The mounting bracket (38) has exhaust holes (381) equidistantly opened on the side of the mounting bracket (38) near the filter block (33) and the exhaust holes (381) penetrate the mounting bracket (38) to its hollow interior. The other end of the exhaust pipe (39) penetrates the mounting bracket (38) to its interior and is fixedly connected.

7. A portable dust purifier for coal mines according to claim 6, characterized in that: The bracket (391) is fixedly installed on the wall of the movable cavity (36), the trigger rod (393) is attached to the side of the bracket (391) and covers the exhaust groove (392), and the second support cylinder (394) is movably sleeved on the side of the trigger rod (393).

8. A portable dust purifier for coal mines according to claim 7, characterized in that: The compressed air tank (372) is attached to the side and wall of the mask (31) and the first guide groove (37), the piston block (362) is movably installed inside the movable cavity (36), and the first support cylinder (361) is fixedly connected between the side of the piston block (362) and the wall of the movable cavity (36).

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