An intrinsically safe camera for laser dust removal with flexible material sealing and a dust removal method

Abstract

The present invention discloses a laser dust removal intrinsically safe camera based on flexible material sealing and a dust removal method. During dust removal, the rotating explosion-proof device rotates to a position on the same axis as the camera body, the movable rubber ring moves horizontally along the optical axis of the camera towards the direction close to the camera, and fits with the annular rubber ring. The umbrella-shaped rubber seal rotates to face the movable rubber ring; the chamber where the camera and the explosion-proof lens are located is evacuated, and then inert gas is driven to squeeze the umbrella-shaped rubber seal to make it fit with the movable rubber ring; after fitting, the laser emitter emits laser and swings to clean the camera lens; after the laser irradiation is completed, the umbrella-shaped rubber seal and the movable rubber ring return to their original positions to restore the camera's line of sight. The present invention uses laser to burn and vibrate the explosion-proof lens, so as to achieve the cleaning effect, and has the advantages of greater dust removal force, no residue, higher efficiency, convenient operation, etc.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof dust removal for mining cameras, in particular to a laser dust removal intrinsically safe camera and a dust removal method based on flexible material sealing. Background Art

[0002] Mining cameras working on the conveying and mining faces are easily contaminated by dust particles and other adhesives. Currently available dust removal devices mainly use wipers, cleaning cotton and other materials to scrape the mirror surface. There are also devices that use ultrasonic vibration lenses to remove dust and use fans to form air films to isolate dust. However, the mining environment of the working face is relatively harsh, and the types of adhesives are relatively complex, which leads to the dust removal effect of the wiper-type dust removal device is not ideal, and the force applied by the brush head to the dust particles will increase the friction between the particles and the lens, causing irreversible scratches on the lens. In addition, the wiper-type dust removal device also needs to replace the brush head regularly, which is cumbersome to use. Ultrasonic waves and air films are also difficult to remove adhesives, and ultrasonic waves need to be cleaned with liquids, and the liquids also need to be replaced regularly.

[0003] In view of the shortcomings of existing technologies, a new technology is urgently needed to solve the dust removal problem of mining cameras. Lasers can burn, fragment, and vibrate pollutants such as dust, so that they can be vaporized, peeled off, and ejected to achieve the purpose of cleaning. Lasers will burn pollutants. Depending on the type of pollutant, the reaction produced by the burning is different. Generally, the energy generated will vaporize the pollutant and may be accompanied by combustion. Ultraviolet lasers are cold light sources and are suitable for use in environments that are sensitive to heat. However, if a fixed area is continuously cleaned, the temperature will increase with the increase in usage time, which may ignite combustible gases. Therefore, lasers are not suitable for use alone and need to be used in conjunction with flexible materials, motors and other components. At present, the explosion-proof measures for existing coal mine underground equipment are mainly to install explosion-proof shells. The explosion-proof shell is generally an integral structure, and its outer surface is difficult to clean by itself. Using another device to clean the surface of the explosion-proof shell requires considering the sealing problem between the two explosion-proof shells. Flexible materials have the advantage of high toughness and can be squeezed to fill the gap. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a laser dust removal intrinsically safe camera and dust removal method based on flexible material sealing, which are used to solve the problems of wiper-type dust removal devices aggravating lens wear, poor dust removal effect and the need for frequent replacement of parts. It achieves efficient dust removal of explosion-proof lenses with a fast speed, no residue generation, and no need to replace parts at a later stage.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: a intrinsically safe camera for laser dust removal based on flexible material sealing, wherein the main housing of the camera is installed on the camera bracket, damping springs are arranged at the bottom of the camera bracket, and a camera body, a rotary explosion-proof device, a laser dust removal device and an air pump dust isolation device are arranged in the main housing of the camera.

[0006] The camera body includes a camera and a power socket; the power socket is arranged on the partition board on the back of the camera, and two pipe-shaped chambers are arranged in the power socket for passing the power cord and the air guide pipe through the power socket.

[0007] Two pipe-shaped chambers are opened on the inner wall of the camera body, which are respectively used for passing the power cord and arranging the laser dust removal device; a chamber is arranged at the bottom of the camera body for accommodating the explosion-proof motor of the main housing. The base of the explosion-proof motor of the main housing is fixed on the camera bracket, and the motor shaft of the explosion-proof motor of the main housing is connected to the rotary explosion-proof device. When the motor shaft rotates, the rotary explosion-proof device can be docked with the camera body, and when it rotates in the reverse direction, the two are separated.

[0008] The air pump dust isolation device is arranged inside the partition board for isolating the gas between the chamber where the air pump dust isolation device is located and the power socket; the air pump dust isolation device is composed of a micro dual-purpose air pump and two air guide pipes; the two air guide pipes are respectively communicated with the groove in front of the explosion-proof lens and the chamber where the camera is located.

[0009] The laser dust removal device includes a laser dust removal explosion-proof motor, a ball screw, a screw nut and a laser emitter; the laser dust removal explosion-proof motor is fixed on the partition board, and its motor shaft is fixedly connected to the ball screw. The ball screw passes through the pipe-shaped chamber of the camera body and extends to the front of the lens. A joint rotating shaft is fixed on the screw nut, and the joint rotating shaft is connected to the laser emitter.

[0010] The rotary explosion-proof device is divided into upper and lower chambers. A lower chamber explosion-proof motor and bevel gears are arranged in the lower chamber; a micro air compressor, an upper chamber explosion-proof motor, an upper chamber ball screw, a movable rubber ring and an umbrella-shaped rubber seal are arranged in the upper chamber; the lower chamber explosion-proof motor drives the umbrella-shaped rubber seal to rotate through a pair of bevel gears, so that the umbrella-shaped rubber seal can block the main camera lens; the micro air compressor and the upper chamber explosion-proof motor are both fixed on the inner wall of the chamber. The motor shaft of the upper chamber explosion-proof motor is welded to the upper chamber ball screw, driving the movable rubber ring to move horizontally in the chamber, so that the movable rubber ring blocks the gap generated when the rotary explosion-proof device is screwed with the main housing of the camera; the micro air compressor pressurizes to deform the umbrella-shaped rubber seal, and then it fits with the movable rubber ring.

[0011] Further preferably, a keyway is provided on the motor shaft of the main housing explosion-proof motor for the power cord inside the rotary explosion-proof device to pass through; the power cord passes through the keyway, the bottom chamber of the camera body, and the tubular chamber on the inner wall of the camera body in sequence, and is finally connected to the power socket.

[0012] Further preferably, the camera body further includes an explosion-proof lens, and the explosion-proof lens covers in front of the lens of the camera.

[0013] The ball screw and the screw nut are installed in the tubular chamber of the camera body. The laser emitter is connected to the camera body through a joint shaft, and the laser emitter is fixed to the screw nut through another joint shaft. The laser dust removal explosion-proof motor controls the swing of the laser emitter through the ball screw. The laser emitter has one degree of freedom, and the range of its swing covers the entire explosion-proof lens.

[0014] Further preferably, the camera body further includes an annular rubber ring. The annular rubber ring is manufactured by injection molding technology and is adhered to the inner wall of the main housing of the camera through a high-temperature metal adhesive; the outer ring of the annular rubber ring is made of hard flame-retardant plastic, and four grooves are provided on the outer ring, and the inner ring is made of flame-retardant rubber.

[0015] Further preferably, the movable rubber ring is divided into an inner ring and an outer ring. The outer ring is made of hard flame-retardant plastic. By using injection molding technology, a screw nut is cast on the outer ring, which can cooperate with the ball screw in the upper chamber; four cylindrical positioning pins are injection molded on one side of the outer ring close to the annular rubber ring, which cooperate with the grooves of the annular rubber ring for positioning and bearing; the inner ring is injection molded from flame-retardant rubber and is used to block the gap generated when the rotary explosion-proof device and the camera body are screwed together, isolate the entry of external air, and help form a low-pressure area.

[0016] Further preferably, the material of the umbrella-shaped rubber seal is flame-retardant rubber, and the rotating shaft is made of hard flame-retardant plastic. One end of the rotating shaft fits into the groove on the inner wall of the rotary explosion-proof device, and the other end passes through the through hole and inserts into the lower chamber of the rotary explosion-proof device, and meshes with the explosion-proof motor in the lower chamber through a bevel gear.

[0017] Further preferably, the micro air compressor is connected to an external gas source through a compressor air duct. The gas source uses inert gas, and nitrogen plays a protective role when the umbrella-shaped rubber seal and the movable rubber ring are not tightly sealed.

[0018] The dust removal method of the laser dust removal intrinsically safe camera based on flexible material sealing specifically includes the following steps:

[0019] S1: The main housing explosion-proof motor drives the rotary explosion-proof device to rotate until the rotary explosion-proof device and the camera body are located on the same axis; the explosion-proof motor 25 in the upper chamber operates to make the movable rubber ring move horizontally along the optical axis of the camera in the direction close to the camera and fit with the annular rubber ring;

[0020] S2: The explosion-proof motor 21 in the lower chamber drives the umbrella-shaped rubber seal to rotate so that it faces the movable rubber ring.

[0021] S3: The mini dual-purpose air pump operates to evacuate the chambers where the camera and the explosion-proof lens are located respectively through two air ducts; the mini air compressor operates to drive the inert gas to squeeze the umbrella-shaped rubber seal to fit with the movable rubber ring.

[0022] S4: The laser emitter emits laser, and at the same time, the laser dust removal explosion-proof motor acts to drive the ball screw to rotate, causing the laser emitter to swing.

[0023] S5: After the laser irradiation is completed, the mini dual-purpose air pump continues to work, the mini air compressor gradually stops working, and at the same time, the mini dual-purpose air pump inflates the chamber. The explosion-proof motor in the lower chamber drives the umbrella-shaped rubber seal to rotate 180 degrees. Subsequently, the explosion-proof motor in the upper chamber drives the ball screw in the upper chamber to retract the movable rubber ring. Finally, the main housing explosion-proof motor drives the rotary explosion-proof device to rotate 180 degrees to restore the line of sight of the camera.

[0024] Further preferably, the dust removal method is controlled based on time, and each component works in the order of the preset time.

[0025] Before step S1 is executed, the timing time of the controller of the main housing explosion-proof motor should be set to control the main housing explosion-proof motor to drive the rotary explosion-proof device to rotate.

[0026] Further preferably, the irradiation time of the laser emitter is not less than 1 minute; the laser emitter swings at least 2 back and forth within one irradiation cycle.

[0027] After the laser emitter stops working, the mini dual-purpose air pump continues to work to completely evacuate the generated waste gas; after half a minute, the mini air compressor stops working, and at the same time, the mini dual-purpose air pump jets air into the chamber to increase the air pressure, and at this time, the umbrella-shaped rubber seal resumes its deformation.

[0028] The present invention has the following beneficial effects:

[0029] The intrinsically safe camera with laser dust removal can be installed beside the belt conveyor or at the tunneling machine working face. Compared with the prior art, the present invention realizes efficient dust removal of the explosion-proof lens by using laser to burn and vibrate the explosion-proof lens. This dust removal method has a greater force, is more thorough in dust removal, faster in speed, generates no residues, and does not require component replacement in the later stage. The micro dual-purpose air pump can extract the combustible gas in the chamber, thereby removing the combustion source to achieve explosion protection. At the same time, it can form a low-pressure area, which forms a contrast with the high-pressure area, thereby enhancing the effect of air pressure on the umbrella-shaped rubber seal. When the camera works normally, the micro dual-purpose air pump blows air outwards to form a full-coverage air film in front of the explosion-proof lens, and the air film can isolate part of the dust. The movable rubber ring uses hard flame-retardant plastic to achieve the positioning and fixation between devices and bears part of the pressure. The deformation of the flame-retardant rubber product realizes the sealing of the entire device, isolating the external combustible gas. The micro air compressor makes each rubber part deform by increasing the air pressure.

[0030] The dust removal method based on the intrinsically safe camera with laser dust removal can seal the gap generated by the docking of the tubular explosion-proof housing, and then extract the gas inside the explosion-proof housing and at the docking part, providing explosion-proof conditions for the dust removal work of the laser underground. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the intrinsically safe camera with laser dust removal based on flexible material sealing.

[0032] Figure 2 It is a sectional view of the working state of the laser dust removal device of the intrinsically safe camera with laser dust removal based on flexible material sealing.

[0033] Figure 3 It is a sectional view of the rotating explosion-proof device of the present invention.

[0034] Figure 4 It is a schematic diagram of the principle of the electric control system of the present invention.

[0035] Figure 5 It is a schematic diagram of the working process of the present invention.

[0036] Wherein: 1. Camera body; 11. Camera; 12. Explosion-proof lens; 13. Power socket; 14. Main housing explosion-proof motor; 15. Annular rubber ring; 2. Rotating explosion-proof device; 21. Lower chamber explosion-proof motor; 22. Bevel gear; 23. Micro air compressor; 24. Compressor air duct; 25. Upper chamber explosion-proof motor; 26. Upper chamber ball screw; 27. Movable rubber ring; 28. Umbrella-shaped rubber seal; 3. Laser dust removal device; 31. Laser dust removal explosion-proof motor; 32. Ball screw; 33. Lead screw nut; 34. Laser emitter; 4. Air pump dust isolation device; 5. Camera bracket; 6. Vibration damping spring. EMBODIMENTS

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present invention. The specific dimensions adopted in this embodiment are only for illustrating the technical solution by way of example and do not limit the protection scope of the present invention.

[0038] The present invention will be further described in detail below in conjunction with the drawings and specific preferred embodiments.

[0039] When the flexible material sealing device of the present invention is working, the relative positions of the camera body 1 and the rotary explosion-proof device 2 are as Figure 1 shown.

[0040] As Figure 2 shown, two pipe-shaped chambers are cast inside the power socket 13, which are respectively used for installing the power cord and the air duct; the air pump dust isolation device 4 is installed on the partition on the left side of the power socket 13. This partition can isolate the gas between the chamber where the air pump dust isolation device 4 is located and the rear power socket 13. The air pump dust isolation device 4 is composed of a micro dual-purpose air pump and two air ducts. A rectangular hole is opened on the inner wall of the left groove of the explosion-proof lens 12, and this hole is connected to one air duct; a circular through hole is opened on the inner wall of the chamber where the camera 11 is located, which is connected to the other air duct. The connections between the pipes and the chambers are all sealed with sealing rings and sealants. In the dust removal mode of the camera 11, the main function of the micro dual-purpose air pump is to extract the combustible gas in the two chambers and form a low-pressure area. When the camera 11 is working normally, the air pump connected to the chamber of the camera 11 stops working, and the air pump connected to the front groove of the explosion-proof lens 12 blows air outwards to form an air film to provide dust isolation protection for the lens.

[0041] Two pipe-shaped chambers are opened on the inner wall of the camera body 1, which are respectively used to fix the power cord and the laser dust removal device 3. There is a chamber under the main housing, which is used to fix the explosion-proof motor 14 of the main housing. The shaft of this explosion-proof motor is connected to the lower chamber of the rotary explosion-proof motor through a nut and welded. A keyway is opened on the motor shaft, and its purpose is to install the power cord in the rotary explosion-proof device 2 into the power socket 13 of the main housing through the keyway.

[0042] The laser dust removal device 3 includes a laser dust removal explosion-proof motor 31, a ball screw 32, a screw nut 33, and a laser emitter 34. The laser dust removal explosion-proof motor 31 is fixed on the partition board, and its motor shaft is welded to the ball screw 32. The screw nut 33 is fixed with a joint rotating shaft and is fitted into the bearing seat of the laser emitter 34. The laser emitter 34 is embedded in the inner wall of the main housing through another rotating shaft. The laser dust removal explosion-proof motor 31 controls the swing of the laser emitter 34 through the ball screw 32. The laser emitter 34 has one degree of freedom, and the range of its swing satisfies that the laser covers the entire explosion-proof lens 12. The function of this device is to perform laser cleaning on the explosion-proof lens 12, making a periodic swing each time the dust removal work is completed, and a total of two cleanings are completed.

[0043] Figure 2 The rotating explosion-proof device 2 shown is in the dust removal working state. The rotating explosion-proof device 2 is divided into upper and lower chambers. The lower chamber is provided with a lower chamber explosion-proof motor 21 and bevel gears 22; the upper chamber is provided with a micro air compressor 23, an upper chamber explosion-proof motor 25, an upper chamber ball screw 26, a movable rubber ring 27, and an umbrella-shaped rubber seal 28. The lower chamber explosion-proof motor 21 is welded in the lower chamber and drives the umbrella-shaped rubber seal 28 to rotate through a pair of bevel gears 22. The micro air compressor 23 and the upper chamber explosion-proof motor 25 are both welded on the inner wall of the chamber. There is a narrow pipe-shaped chamber on the inner wall for installing power lines and extending them to the lower chamber and then to the power socket 13. The motor shaft of the upper chamber explosion-proof motor 25 is welded to the ball screw 32 to drive the movable rubber ring 27 to move horizontally. The main function of the micro air compressor 23 is to increase the pressure in the upper chamber of the rotating explosion-proof device 2, causing the umbrella-shaped rubber seal 28 to deform and thus fit with the annular rubber ring 15 and the movable rubber ring 27 respectively. The compressor air duct 24 connected to the micro air compressor 23 is fixed to the buckle on the outer shell of the lower chamber and extends to the external air source to provide pure nitrogen for the compressor. If there are small gaps in the seal, nitrogen can also play a protective role. The movable rubber ring 27 is divided into an inner and an outer ring. The outer ring is made of hard flame-retardant plastic. Using injection molding technology, the outer ring is cast with a screw nut 33 inside, which can cooperate with the ball screw 32. Four cylindrical positioning pins are injection-molded at one end of the outer ring close to the annular rubber ring 15 for positioning and bearing. The inner ring is injection-molded from flame-retardant rubber and is relatively soft, allowing for large deformation. The main function of this seal ring is to block the gap generated when the rotating explosion-proof device 2 is screwed together with the camera body 1 and isolate the entry of external air, which is beneficial for the formation of a low-pressure area.

[0044] The umbrella-shaped rubber seal 28 is made of flame-retardant rubber, and its rotating shaft is made of hard flame-retardant plastic. One end of the rotating shaft fits into the groove on the inner wall of the rotating explosion-proof device 2, and the other end is inserted into the lower chamber through a through-hole and connected to the bevel gear 22 by welding, which meshes with the bevel gear of the explosion-proof motor. When the umbrella-shaped rubber seal 28 is not deformed, the maximum diameter of its end face is smaller than the inner diameter of the circular cross-section of the chamber minus the diameter of the ball screw 32 and larger than the inner diameter of the movable rubber ring 27. By adjusting the working intensity of the micro air compressor 23, when the umbrella-shaped rubber seal 28 undergoes the maximum deformation, the maximum diameter of its end face is still larger than the inner diameter of the movable rubber ring 27, and the degree of bending will not cause the protruding part of the umbrella-shaped rubber seal 28 to cross the end face of the annular rubber ring.

[0045] The annular rubber ring 15 is fixed in front of the explosion-proof lens 12 and is divided into an inner and an outer ring. The outer ring is made of hard flame-retardant plastic, and the inner ring is made of flame-retardant rubber. The inner and outer rings are molded into one body through injection molding technology and adhered to the inner wall of the camera body 1 with a high-temperature metal adhesive. The main function of the outer ring of the flame-retardant material is to prevent the accidentally ignited gas from diffusing outward. Four grooves are injection-molded on the outer ring for fitting with the cylindrical positioning pins of the movable rubber ring 27 and bearing the tangential pressure generated by the air pressure, so as to cooperate with the explosion-proof motor 14 of the main housing to fix the rotating explosion-proof device 2; a 45-degree chamfer is cut at the meshing part of the inner ring and the umbrella-shaped rubber seal 28 to better fit the seal.

[0046] As Figure 3 shown, the rotating explosion-proof device 2 is in a non-working state. When the camera 11 is working normally, the umbrella-shaped rubber seal 28 and the movable rubber ring 27 are in a contracted state. The rotating explosion-proof device 2 is located in front of the side of the camera body 1, and the rotating explosion-proof device 2 has a certain angle with the main axis of the camera body 1 along the shooting line of sight of the camera to prevent the rotating explosion-proof device 2 from blocking the shooting line of sight of the camera 11.

[0047] As Figure 4 shown, the controller is connected to the air pump dust separation device 4, the lower chamber explosion-proof motor 21, the upper chamber explosion-proof motor 25, the main housing explosion-proof motor 14, the laser emitter 34, the camera 11, and the laser dust removal explosion-proof motor 31 through power lines respectively. The explosion-proof power supply supplies power to all devices through the power socket 13. The main housing explosion-proof motor 14 controls the rotation of the rotating explosion-proof device 2, and the laser dust removal explosion-proof motor 31 controls the swing of the laser emitter 34.

[0048] The specific working process of the present invention is as Figure 5 shown and is described in detail as follows:

[0049] The device removes dust from the explosion-proof lens 12 at regular intervals. When the set time is reached, the explosion-proof motor 14 in the main housing drives the rotary explosion-proof device 2 to rotate until it is coaxially aligned with the camera 11. At this time, the two end faces are in contact. Then, the explosion-proof motor 25 in the upper chamber operates to drive the movable rubber ring 27 to move horizontally along the optical axis of the camera 11 towards the camera 11 until it contacts the annular rubber ring 15. After contact, the explosion-proof motor 21 in the lower chamber drives the umbrella-shaped rubber seal 28 to rotate so that its convex surface faces the movable rubber ring 27. After they are in contact, the micro dual-purpose air pump operates. Through two air ducts, the chambers where the camera 11 and the explosion-proof lens 12 are located are evacuated respectively to extract combustible gases and form a low-pressure area. At the same time, the micro air compressor 23 operates to pressurize the upper chamber of the rotary explosion-proof device 2 and fill it with protective gas. Under the action of air pressure, the umbrella-shaped rubber seal 28 deforms and then fits seamlessly with the movable rubber ring 27 and the annular rubber ring respectively. As a precaution, a waiting time of one minute is provided. Then, after the fitting is completed, the laser emitter 34 emits laser light, and at the same time, the laser dust removal explosion-proof motor operates to drive the ball screw 32 to rotate, causing the laser emitter 34 to swing. During one dust removal process, it swings one cycle, that is, the laser cleans the entire mirror surface twice. After that, it stops working, and the micro dual-purpose air pump continues to work to completely extract the generated waste gas. After half a minute, the micro air compressor 23 stops working, and at the same time, the micro dual-purpose air pump injects air into the chamber to increase the air pressure. At this time, the umbrella-shaped rubber seal 28 resumes its deformation. The explosion-proof motor 21 in the lower chamber drives the umbrella-shaped rubber seal 28 to rotate 180 degrees. Then, the explosion-proof motor 25 in the upper chamber drives the ball screw 32 to retract the movable rubber ring 27. Finally, the explosion-proof motor 14 in the main housing drives the rotary explosion-proof device 2 to rotate 180 degrees to restore the line of sight of the camera 11.

[0050] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. An intrinsically safe camera for laser dust removal with flexible material sealing. The main housing of the camera is installed on a camera bracket (5), and damping springs (6) are arranged at the bottom of the camera bracket (5). It is characterized in that: An imaging device body (1), a rotary explosion-proof device (2), a laser dust removal device (3) and an air pump dust isolation device (4) are arranged in the main housing of the camera; The imaging device body (1) includes an imaging device (11) and a power socket (13); the power socket (13) is arranged on a partition on the back of the imaging device (11). Two tubular chambers are arranged in the power socket (13) for passing a power cord and an air duct through the power socket (13); Two tubular chambers are opened on the inner wall of the imaging device body (1) for respectively passing a power cord and arranging the laser dust removal device (3); a chamber is arranged at the bottom of the imaging device body (1) for accommodating a main housing explosion-proof motor (14). The base of the main housing explosion-proof motor (14) is fixed on the camera bracket (5), and the motor shaft of the main housing explosion-proof motor (14) is connected to the rotary explosion-proof device (2). When the motor shaft rotates, the rotary explosion-proof device (2) can be docked with the imaging device body (1), and when it rotates in the reverse direction, the two are separated; The air pump dust isolation device (4) is arranged inside the partition for isolating the gas between the chamber where the air pump dust isolation device (4) is located and the power socket (13); the air pump dust isolation device (4) is composed of a miniature dual-purpose air pump and two air ducts; the two air ducts are respectively communicated with a groove in front of an explosion-proof lens (12) and the chamber where the imaging device (11) is located; The laser dust removal device (3) includes a laser dust removal explosion-proof motor (31), a ball screw (32), a screw nut (33), and a laser emitter (34); the laser dust removal explosion-proof motor (31) is fixed on the partition, and its motor shaft is fixedly connected to the ball screw (32). The ball screw (32) passes through the tubular chamber of the imaging device body (1) and extends in front of the lens. A joint rotating shaft is fixed on the screw nut (33), and the joint rotating shaft is connected to the laser emitter (34); The rotary explosion-proof device (2) is divided into upper and lower chambers. A lower chamber explosion-proof motor (21) and a bevel gear (22) are arranged in the lower chamber; a miniature air compressor (23), an upper chamber explosion-proof motor (25), an upper chamber ball screw (26), a movable rubber ring (27), and an umbrella-shaped rubber seal (28) are arranged in the upper chamber; the lower chamber explosion-proof motor (21) drives the umbrella-shaped rubber seal (28) to rotate through a pair of bevel gears (22) so that the umbrella-shaped rubber seal (28) can block the main camera lens; the miniature air compressor (23) and the upper chamber explosion-proof motor (25) are both fixed on the inner wall of the chamber. The motor shaft of the upper chamber explosion-proof motor (25) is welded to the upper chamber ball screw (26) to drive the movable rubber ring (27) to move horizontally in the chamber so that the movable rubber ring (27) blocks the gap generated when the rotary explosion-proof device (2) is screwed with the main housing of the camera; the miniature air compressor (23) pressurizes to deform the umbrella-shaped rubber seal (28), and then the umbrella-shaped rubber seal (28) fits with the movable rubber ring (27).

2. The intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 1, characterized in that: A keyway is provided on the motor shaft of the main housing explosion-proof motor (14) for the power cord inside the rotating explosion-proof device (2) to pass through; the power cord sequentially passes through the keyway, the bottom chamber of the camera body (1), and the tubular chamber on the inner wall of the camera body (1), and finally connects to the power socket (13).

3. The intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 1, characterized in that: The camera body (1) further includes an explosion-proof lens (12), and the explosion-proof lens (12) covers in front of the lens of the camera; The ball screw (32) and the screw nut (33) are installed in the tubular chamber of the camera body (1). The laser emitter (34) is connected to the camera body (1) through a joint shaft, and the laser emitter (34) is fixed to the screw nut (33) through another joint shaft. The laser dust removal explosion-proof motor (31) controls the swing of the laser emitter (34) through the ball screw (32). The laser emitter (34) has one degree of freedom, and the range of its swing covers the entire explosion-proof lens (12).

4. The intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 1, characterized in that: The camera body (1) further includes an annular rubber ring (15). The annular rubber ring (15) is manufactured by injection molding technology and is adhered to the inner wall of the camera main housing through a high-temperature metal adhesive; the outer ring of the annular rubber ring (15) is made of hard flame-retardant plastic, and four grooves are provided on the outer ring, and the inner ring is made of flame-retardant rubber.

5. The intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 4, characterized in that: The movable rubber ring (27) is divided into an inner and an outer ring. The outer ring is made of hard flame-retardant plastic. By using injection molding technology, a screw nut is cast on the outer ring, which can cooperate with the ball screw (26) in the upper chamber; four cylindrical positioning pins are injection molded on the side of the outer ring close to the annular rubber ring, which cooperate with the grooves of the annular rubber ring for positioning and bearing; the inner ring is injection molded from flame-retardant rubber and is used to block the gap generated when the rotating explosion-proof device (2) is screwed with the camera body (1) and isolate the entry of external air to help form a low-pressure area.

6. The intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 1, characterized in that: The material of the umbrella-shaped rubber seal (28) is flame-retardant rubber, and the rotating shaft is made of hard flame-retardant plastic. One end of the rotating shaft fits into the groove on the inner wall of the rotating explosion-proof device (2), and the other end passes through the through hole and inserts into the lower chamber of the rotating explosion-proof device (2), and meshes with the lower chamber explosion-proof motor (21) through a bevel gear (22).

7. The intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 1, characterized in that: The micro air compressor (23) is connected to an external air source through a compressor air duct (24). The air source uses inert gas, and nitrogen plays a protective role when the umbrella-shaped rubber seal (28) and the movable rubber ring (27) are not tightly sealed.

8. The dust removal method of the intrinsically safe camera for laser dust removal sealed with flexible materials according to any one of claims 1-7, characterized in that, it specifically includes the following steps: S1: The main housing explosion-proof motor (14) drives the rotary explosion-proof device (2) to rotate until the rotary explosion-proof device (2) and the camera body (1) are located on the same axis; the upper chamber explosion-proof motor (25) operates to make the movable rubber ring (27) horizontally move along the optical axis of the camera (11) in the direction close to the camera (11) and fit with the annular rubber ring; S2: The lower chamber explosion-proof motor (21) drives the umbrella-shaped rubber seal (28) to rotate so that it faces the movable rubber ring (27); S3: The air pump dust isolation device (4) operates, and through two air ducts, the chambers where the camera (11) and the explosion-proof lens (12) are located are evacuated respectively; the micro air compressor (23) operates to drive the inert gas to squeeze the umbrella-shaped rubber seal (28) to fit with the movable rubber ring (27); S4: The laser emitter (34) emits laser, and at the same time the laser dust removal explosion-proof motor (31) operates to drive the ball screw (32) to rotate, so that the laser emitter (34) swings; S5: After the laser irradiation is completed, the air pump dust isolation device continues to work, the micro air compressor (23) gradually stops working, and at the same time the air pump dust isolation device inflates the chamber. The lower chamber explosion-proof motor (21) drives the umbrella-shaped rubber seal (28) to rotate 180 degrees, and then the upper chamber explosion-proof motor (25) drives the upper chamber ball screw (26) to retract the movable rubber ring (27). Finally, the main housing explosion-proof motor (14) drives the rotary explosion-proof device (2) to rotate 180 degrees to restore the line of sight of the camera (11).

9. The dust removal method of the intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 8, characterized in that: This dust removal method is based on time control, and each component works in the order of the preset time; Before step S1 is executed, the timing time of the controller of the main housing explosion-proof motor (14) should be set to control the main housing explosion-proof motor (14) to drive the rotary explosion-proof device (2) to rotate at a fixed time.

10. The dust removal method of the intrinsically safe camera for laser dust removal sealed with flexible materials according to claim 8, characterized in that: The irradiation time of the laser emitter (34) is not less than 1 minute; within one irradiation cycle, the laser emitter (34) swings at least 2 back and forth; After the laser emitter (34) stops working, the air pump dust isolation device continues to work to completely evacuate the generated waste gas; after half a minute, the micro air compressor (23) stops working, and at the same time the air pump dust isolation device jets air into the chamber to make the air pressure rise, and at this time the umbrella-shaped rubber seal (28) restores its deformation.

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