Dustproof composite sensor for coal ventilator

Abstract

The utility model provides a dust-proof composite sensor for a coal ventilator, which belongs to the technical field of composite sensors and comprises a box body and a box cover, a dust sensing component is arranged in the box body and comprises a laser transmitter and a photosensitive element, the laser transmitter is arranged in the box body, a first pneumatic spray gun is arranged in the box body, and a second pneumatic spray gun is arranged in the box cover. A duckbilled nozzle pointing to the glass plate is arranged at one end of the first pneumatic spray gun, a temperature sensing assembly penetrating through one side of the box body is arranged in the box body and comprises a temperature sensing probe and an insulating shell, the insulating shell is arranged on one side of the box body, and one end of the temperature sensing probe is exposed out of the insulating shell; a second pneumatic spray gun facing the temperature sensing probe is further arranged on one side of the box body. A second pneumatic spray gun with a duckbilled nozzle is arranged on the outer side of the box body, and the duckbilled nozzle on the second pneumatic spray gun points to the temperature sensing assembly. And through the arrangement of the first pneumatic spray gun and the second pneumatic spray gun, the automatic cleaning capability and efficiency of the composite sensor can be improved, and the environmental adaptability is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to composite sensor technical field, more specifically, it is especially related to a dustproof composite sensor for coal ventilator. BACKGROUND

[0002] In the process of coal mining, transportation and processing, mine ventilation system is the core link of safety production. In order to master the working condition of ventilator, it is usually necessary to deploy multiple sensors at its key parts, and these sensors jointly constitute the basis of ventilator state monitoring and fault early warning system.

[0003] However, the coal production environment has the characteristics of high dust concentration. In the process of ventilator operation, a large amount of fine dust particles will inevitably accumulate in its interior and periphery. The physical adhesion of dust will cover the sensitive surface of the sensing element, form an isolation layer, seriously hinder the effective contact of the sensing element and the measured physical quantity, and cause the attenuation of the measurement signal. At present, the common technical means for the protection and dust removal of the sensor in the dust environment include passive or semi-active measures such as increasing physical protective cover, using dust-repellent coating or regular manual cleaning. These methods have limitations. Although the physical protective cover can block part of the large particle dust, it is difficult to prevent the invasion and adhesion of fine dust, and may affect the response speed of the sensor. The effect of dust-repellent coating decreases with the passage of time and changes in environmental conditions, and it is not effective for all types of dust. Regular manual cleaning not only needs to stop operation, affects the continuous operation of the ventilator, increases the maintenance cost, but also is difficult to implement in space-limited or high-risk areas. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model discloses a dustproof composite sensor for coal ventilator, which solves the technical problems of insufficient environmental adaptability and low cleaning efficiency of the traditional composite sensor in the prior art.

[0005] The utility model discloses a dustproof composite sensor for coal ventilator, which solves the technical problems of insufficient environmental adaptability and low cleaning efficiency of the traditional composite sensor in the prior art.

[0006] A dustproof composite sensor for coal ventilator, comprising a box body and a box cover.

[0007] A dust sensing assembly is arranged in the box body.

[0008] The dust sensing assembly comprises a laser emitter and a photosensitive element, the photosensitive element is arranged in the box body through a photosensitive element mounting seat, a glass plate is arranged above the photosensitive element, the glass plate is located on the light receiving path of the photosensitive element, a laser emitter sliding seat is arranged on one side of the inner wall of the box body, and a laser emitter is arranged on the laser emitter sliding seat.

[0009] The first pneumatic spray gun is arranged on one side of the photosensitive element and faces the glass plate.

[0010] The temperature sensing assembly is arranged in the box and penetrates one side of the box, and comprises a temperature sensing probe and an insulating shell.

[0011] The first pneumatic spray gun fixing assembly is arranged in the box and comprises a pneumatic spray gun mounting seat.

[0012] The first pneumatic spray gun mounting seat is arranged in the box, one end of the first force arm is connected with the pneumatic spray gun mounting seat, the other end is connected with a second force arm, and one end of the second force arm is provided with the first pneumatic spray gun.

[0013] The pneumatic spray gun fixing seat is arranged on the outside of the box, the second pneumatic spray gun is arranged on the pneumatic spray gun fixing seat, and the first pneumatic spray gun and the second pneumatic spray gun are both provided with a duckbill nozzle at one end and an air connection pipe at the other end.

[0014] In a preferred embodiment, the dust sensing assembly further comprises a reflector.

[0015] The reflector mounting seat is arranged above the box and above the photosensitive element, a reflector sliding groove is formed in the reflector mounting seat, and the reflector is slidably connected to the reflector sliding groove.

[0016] The box is provided with a plurality of groups of air inlet holes on one side, and an air inlet light shield is arranged outside the air inlet holes.

[0017] The box is provided with a plurality of groups of air inlet holes on one side, and an air inlet light shield is arranged outside the air inlet holes.

[0018] The box is provided with a plurality of groups of air inlet holes on one side, and an air inlet light shield is arranged outside the air inlet holes.

[0019] In a preferred embodiment, the box is provided with a control module, and the laser emitter, the photosensitive element and the temperature sensing probe are electrically connected to the control module.

[0020] The technical scheme further comprises: the temperature sensing assembly further comprises sealing glue, the sealing glue is arranged between the temperature sensing probe and the insulating shell, and two groups of electric wires are connected to one end of the temperature sensing probe in the insulating shell.

[0021] In a preferred embodiment, the light-sensitive element is provided with a protective box on the side, and a glass mounting sliding groove is formed on the protective box, and the glass plate is slidably connected in the glass mounting sliding groove.

[0022] In a preferred embodiment, the box is provided with a box cover sliding groove on one side, and the box cover is slidably connected with the box through the box cover sliding groove.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. The setting of the first pneumatic spray gun and the second pneumatic spray gun enables the composite sensor to actively cope with high dust load. Even in the harsh condition of extremely high coal dust concentration inside or around the ventilator, the pneumatic spray gun can timely and effectively remove the dust on the surface of the sensing element, prevent the continuous accumulation of dust from affecting the measurement performance, and improve the stability and environmental adaptability of the sensor in the complex and severe environment of the coal mine underground; meanwhile, the first pneumatic spray gun for cleaning the optical glass plate is not fixedly installed, but is fixed through an adjustable supporting mechanism composed of a mounting base, a first force arm and a second force arm. The mechanism allows the operator to flexibly adjust the spatial position and the spraying angle of the spray gun and the duckbill nozzle according to the actual situation. The adjustability ensures that the compressed air flow can accurately and fully cover the entire surface of the glass plate, and can be optimized and adjusted according to the dust accumulation or the change of the internal layout of the equipment, thereby maximizing the cleaning effect and avoiding the cleaning dead angle or uneven efficiency that may exist in the fixed spray gun, and improving the flexibility of the first pneumatic spray gun, thereby further improving the environmental adaptability of the composite sensor.

[0025] 2. One end of the first pneumatic spray gun and the second pneumatic spray gun is provided with a duckbill nozzle, which is used for timed and directional spraying cleaning of the optical glass plate and the temperature probe respectively. The spray gun generates a flat and concentrated air flow through the specially designed duckbill nozzle, which is directed to the sensing end of the optical glass protective plate and the temperature probe. This structure uses the physical impact force of compressed air to effectively blow off the dust particles attached to the sensitive surface, significantly reducing the light signal attenuation or temperature sensing inaccuracy caused by dust coverage. Compared with the traditional composite sensor relying on manual wiping, the pneumatic spray gun is faster and more comprehensive in coverage, and can continuously maintain the cleanliness of the key measurement surface during equipment operation, thereby ensuring the accuracy of the dust concentration and temperature data, and the cleaning efficiency is higher than that of the traditional composite sensor dust removal mode. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the utility model.

[0027] Figure 2 It is an exploded view of the utility model.

[0028] Figure 3 It is a structural schematic view of the laser emitter in the utility model.

[0029] Figure 4 It is a structural schematic view of the utility model Figure 4 in the enlarged view of a region.

[0030] Figure 5 It is a structural schematic view of the temperature sensing probe in the utility model.

[0031] Figure 6 It is Figure 5 the sectional view of A-A.

[0032] Figure 7 It is a structural schematic view of the second pneumatic spray gun in the utility model.

[0033] Figure 8 It is a structural schematic view of the box body in the utility model.

[0034] Figure 9 It is a structural schematic view of the air inlet light shield in the utility model.

[0035] Figure 10 It is a structural schematic view of the fan light shield in the utility model.

[0036] Figure 11 It is a structural schematic view of the mirror mounting seat in the utility model.

[0037] In the drawing, the corresponding relationship of component name and drawing number is as follows:

[0038] 100, box; 200, box cover; 101, laser emitter; 102, photosensitive element; 103, photosensitive element mounting seat; 104, protective box; 105, glass mounting sliding groove; 106, glass plate; 107, laser emitter sliding seat; 108, reflector; 109, reflector mounting seat; 110, reflector sliding groove; 111, control module; 201, first pneumatic spray gun; 202, duckbill nozzle; 203, air connection pipe; 204, pneumatic spray gun fixing seat; 205, second pneumatic spray gun; 206, pneumatic spray gun mounting seat; 207, first force arm; 208, second force arm; 222, box cover sliding groove; 301, air inlet hole; 302, air inlet light shield; 303, secondary light shield; 304, insect screen; 305, insect screen sliding groove; 306, fan mounting port; 307, air outlet fan; 308, fan light shield; 401, temperature sensing probe; 402, insulating shell; 403, wire; 404, sealant. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be further described in detail below with reference to the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0040] Embodiment:

[0041] As shown in the accompanying drawings Figure 1 to the accompanying drawings Figure 11 As shown in the accompanying drawings

[0042] The utility model provides a dustproof composite sensor for coal ventilator, including box 100 and box cover 200,

[0043] Box 100 is provided with dust sensing assembly in;

[0044] Dust sensing assembly includes laser emitter 101 and photosensitive element 102, and photosensitive element 102 is set up in box 100 through photosensitive element mounting seat 103, and is provided with protective box 104 on photosensitive element 102, and is provided with glass mounting sliding groove 105 on protective box 104, and is slidably connected with glass plate 106 on glass mounting sliding groove 105, and glass plate 106 is located on the light receiving path of photosensitive element 102, and the inner wall of box 100 one side is provided with laser emitter sliding seat 107, and is provided with laser emitter 101 on laser emitter sliding seat 107;

[0045] It can be understood that the laser emitter sliding seat 107 facilitates the installation or removal of the laser emitter 101, the laser emitter 101 emits a light beam through the dust-containing air, and part of the light in the light beam is scattered or absorbed by the dust particles. The photosensitive element 102 receives the light that is not scattered or absorbed, and when the dust concentration changes, the light intensity reaching the photosensitive element 102 changes accordingly, so that the dust concentration is calculated by the amount of change of the light intensity. The glass plate 106 protects the photosensitive element 102 from direct contamination by dust, and the sliding connection facilitates replacement.

[0046] Further, the first pneumatic spray gun fixing assembly is arranged in the box body 100, one end of the first pneumatic spray gun fixing assembly is provided with a first pneumatic spray gun 201, one end of the first pneumatic spray gun 201 is provided with a duckbill spray head 202, and the other end is provided with a gas connection pipe 203, and the duckbill spray head 202 points to the glass plate 106.

[0047] The temperature sensing assembly is arranged in the box body 100 and penetrates one side of the box body 100, and the pneumatic spray gun fixing seat 204 is arranged outside the box body 100. The second pneumatic spray gun 205 is arranged on the pneumatic spray gun fixing seat 204, one end of the second pneumatic spray gun 205 is provided with a duckbill spray head 202, and the other end is provided with a gas connection pipe 203. The duckbill spray head 202 points to the temperature sensing assembly.

[0048] It should be noted that the first pneumatic spray gun 201 and the second pneumatic spray gun 205 are designed to spray cleaning gas flow at regular intervals, and the interval time of the gas spray can be adjusted according to actual conditions.

[0049] It can be understood that the first pneumatic spray gun 201 is connected to the compressed air source through the gas connection pipe 203, the duckbill spray head 202 generates a flat gas flow, and the dust adhered to the surface of the glass plate 106 is blown away at regular intervals to maintain the light transmittance. The second pneumatic spray gun 205 is also connected to the compressed air source, and the duckbill spray head 202 of the second pneumatic spray gun 205 blows away the dust on the surface of the exposed part of the temperature sensing assembly at regular intervals to prevent the dust from accumulating and affecting the temperature measurement.

[0050] As a further scheme of the utility model, the dust sensing assembly further comprises a mirror 108.

[0051] The mirror mounting seat 109 is arranged above the box body 100, the mirror mounting seat 109 is located above the photosensitive element 102, the mirror mounting seat 109 is provided with a mirror sliding groove 110, and the mirror 108 is slidably connected to the mirror sliding groove 110.

[0052] It can be understood that the mirror 108 is used for changing the path of the light beam emitted by the laser emitter 101, guiding the light beam to change direction and shoot towards the photosensitive element 102, prolonging the irradiation distance of the light beam, and the mirror sliding groove 110 is arranged to facilitate replacement of the mirror 108.

[0053] As a further scheme of the utility model, a plurality of air inlet holes 301 are formed on one side of the box body 100, an air inlet light shield 302 is arranged outside the air inlet hole 301, and a secondary light shield 303 is arranged inside the air inlet light shield 302.

[0054] It can be understood that the air inlet hole 301 allows the dust-containing air outside to enter the inside of the box body 100 for detection. The air inlet light shield 302 and the secondary light shield 303 inside jointly form a zigzag air inlet channel, block the stray light in the external environment from entering the inside of the box body 100, and reduce the light interference on the photosensitive element 102.

[0055] As a further scheme of the utility model, a plurality of air inlet holes 301 are formed on one side of the box body 100, an air inlet light shield 302 is arranged outside the air inlet hole 301, and a secondary light shield 303 is arranged inside the air inlet light shield 302.

[0056] It can be understood that the air inlet hole 301 allows the dust-containing air outside to enter the inside of the box body 100 for detection. The air inlet light shield 302 and the secondary light shield 303 inside jointly form a zigzag air inlet channel, block the stray light in the external environment from entering the inside of the box body 100, and reduce the light interference on the photosensitive element 102.

[0057] As a further scheme of the utility model, a plurality of air inlet holes 301 are formed on one side of the box body 100, an air inlet light shield 302 is arranged outside the air inlet hole 301, and a secondary light shield 303 is arranged inside the air inlet light shield 302.

[0058] It should be noted that the control module 111 can be selected as a TAS-LTE-892E model, and the control module 111 is connected with an external circuit.

[0059] As a further scheme of the utility model, a plurality of air inlet holes 301 are formed on one side of the box body 100, an air inlet light shield 302 is arranged outside the air inlet hole 301, and a secondary light shield 303 is arranged inside the air inlet light shield 302.

[0060] It can be understood that the air inlet hole 301 allows the dust-containing air outside to enter the inside of the box body 100 for detection. The air inlet light shield 302 and the secondary light shield 303 inside jointly form a zigzag air inlet channel, block the stray light in the external environment from entering the inside of the box body 100, and reduce the light interference on the photosensitive element 102.

[0061] In the embodiment, the temperature sensing assembly comprises a temperature sensing probe 401 and an insulating shell 402.

[0062] The temperature sensing probe 401 has one end exposed outside the insulating shell 402 and the other end connected with two groups of electric wires 403. The temperature sensing probe 401 and the insulating shell 402 are provided with sealing glue 404. The duckbill nozzle 202 is directed to the exposed end of the temperature sensing probe 401. The temperature sensing probe 401 can be selected from thermocouples or thermal resistors.

[0063] It can be understood that the exposed end of the temperature sensing probe 401 directly contacts the air flowing through the box body 100, senses the change of the air temperature, and transmits the temperature signal to the outside through the electric wires 403. The insulating shell 402 provides electrical insulation protection for the temperature sensing probe 401. The sealing glue 404 is filled between the temperature sensing probe 401 and the insulating shell 402, plays a sealing role, and prevents dust or moisture from entering the inside of the probe to affect the measurement accuracy and service life.

[0064] In the embodiment, the first pneumatic spray gun fixing assembly includes a pneumatic spray gun mounting seat 206.

[0065] The box body 100 is provided with the pneumatic spray gun mounting seat 206. The pneumatic spray gun mounting seat 206 is provided with a first force arm 207. One end of the first force arm 207 is connected with the pneumatic spray gun mounting seat 206, and the other end is provided with a second force arm 208. One end of the second force arm 208 is provided with the first pneumatic spray gun 201.

[0066] It can be understood that the pneumatic spray gun mounting seat 206 provides basic support for the first pneumatic spray gun 201. The first force arm 207 and the second force arm 208 constitute an adjustable support structure. By adjusting the angle and relative position of the two force arms, the pointing direction and height of the first pneumatic spray gun 201 and the duckbill nozzle 202 thereof can be changed, so that the sprayed air flow can effectively cover the to-be-cleaned area of the glass plate 106.

[0067] In the embodiment, the box body 100 is provided with a box cover sliding groove 222. The box cover 200 is slidingly connected with the box body 100 through the box cover sliding groove 222.

[0068] It can be understood that the box cover 200 is connected with the box body 100 through the box cover sliding groove 222, so that the box cover 200 can move along the sliding groove direction, realizing the opening and closing of the box body 100. This sliding connection mode is convenient for the operator to open the box cover 200 and check, maintain or replace the dust sensing assembly, the pneumatic spray gun, the insect screen 304 and other components in the box body 100.

[0069] The specific use and role of the embodiment: when the device is used, the operator first moves the box cover 200 horizontally along the box cover sliding groove 222 to completely expose the internal components of the box body 100.At this time, the fixed position of the laser emitter 101 on the laser emitter slide 107 is confirmed to be accurate, ensuring the stability of the light beam emission direction; the cleanliness and integrity of the glass plate 106 embedded in the light-sensitive element 102 protection box 104 in the glass mounting sliding groove 105 are checked, and if there is dust attached or cracks, it needs to be handled immediately; dust-containing air is sucked in under the negative pressure generated by the operation of the air outlet fan 307, first entering the inside of the box 100 through the air inlet hole 301; in this process, the air inlet light shield 302 and the secondary light shield 303 inside it together form a light blocking channel, effectively preventing external environmental light from directly entering the detection area; then, the air flows through the insect screen 304, which can intercept insects, fibers and other large particle impurities to prevent them from entering the inside of the box 100 and polluting or clogging the sensor assembly; then, the air enters the detection area, and the light beam emitted by the laser emitter 101 passes through the dusty air, and the light beam scatters or attenuates when it encounters dust particles; the mirror 108 reflects the scattered light signal to the light-sensitive element 102, which receives the change in the light signal to analyze the dust concentration; at the same time, the flowing air continuously contacts the exposed end of the thermosensitive probe 401, which senses the change in air temperature through its thermoelectric properties; the insulating shell 402 fixes the thermosensitive probe 401 and provides electrical isolation, and the sealant 404 between them ensures the sealing of the connection between the thermosensitive probe 401 and the insulating shell 402, preventing dust and moisture from entering the internal connection points; the air after completing the detection is discharged from the box 100 by the continuously operating air outlet fan 307 through the fan mounting port 306, and the fan light shield 308 and the secondary light shield 303 inside it also form a light blocking structure to prevent external light from entering the box 100 in the reverse direction during the exhaust process to interfere with the light-sensitive element 102; To prevent dust from continuously accumulating on the surface of the key optical component glass plate 106 and the exposed end of the temperature sensing assembly thermosensitive probe 401 affecting the measurement accuracy, the first pneumatic spray gun 201 generates a flat air flow through its duckbill spray head 202 to blow off the dust attached to the surface of the glass plate 106, maintaining its transparency; the second pneumatic spray gun 205 also generates an air flow through its duckbill spray head 202 to blow off the dust covering on the exposed end of the thermosensitive probe 401, ensuring temperature sensing sensitivity; the position of the first pneumatic spray gun 201 can be adjusted through the support structure formed by the first force arm 207 and the second force arm 208, ensuring that the air flow of the duckbill spray head 202 accurately covers the surface of the glass plate 106; When the components inside the box 100 need to be cleaned, replaced or repaired, the operator can slide the box cover 200 open along the box cover sliding groove 222 to provide an operating channel; the insect screen 304 can also be removed for cleaning or replacement along the insect screen sliding groove 305; the glass plate 106 can be removed for replacement through the glass mounting sliding groove 105; the mirror 108 can also be removed for replacement along the mirror sliding groove 110.

[0070] The embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the present application and its practical application, and to thereby enable others skilled in the art to best utilize the present application with various modifications as are suited to the particular use contemplated.

Claims

1. A dust-proof composite sensor for a coal ventilator, comprising a box body (100) and a box cover (200), characterized in that: a dust sensing assembly is arranged in the box body (100); the dust sensing assembly comprises a laser emitter (101) and a photosensitive element (102), the photosensitive element (102) is arranged in the box body (100) through a photosensitive element mounting seat (103), a glass plate (106) is arranged above the photosensitive element (102), the glass plate (106) is located on a light receiving path of the photosensitive element (102), a laser emitter sliding seat (107) is arranged on one side of an inner wall of the box body (100), and the laser emitter sliding seat (107) is provided with the laser emitter (101); a first pneumatic spray gun (201) is arranged on one side of the photosensitive element (102) and faces the glass plate (106); a temperature sensing assembly is arranged in the box body (100) and penetrates through one side of the box body (100), the temperature sensing assembly comprises a temperature sensing probe (401) and an insulating shell (402), the insulating shell (402) is arranged on one side of the box body (100), one end of the temperature sensing probe (401) is exposed outside the insulating shell (402), and a second pneumatic spray gun (205) is arranged on one side of the box body (100) and faces the temperature sensing probe (401). 2.The dust-proof composite sensor for a coal ventilator according to claim 1, characterized in that: a first pneumatic spray gun fixing assembly is arranged in the box body (100), and the first pneumatic spray gun fixing assembly comprises a pneumatic spray gun mounting seat (206); the pneumatic spray gun mounting seat (206) is arranged in the box body (100), one end of a first force arm (207) is connected with the pneumatic spray gun mounting seat (206), the other end of the first force arm (207) is connected with a second force arm (208), and one end of the second force arm (208) is provided with the first pneumatic spray gun (201); a pneumatic spray gun fixing seat (204) is arranged on the outside of the box body (100), the second pneumatic spray gun (205) is arranged on the pneumatic spray gun fixing seat (204), and duckbill nozzles (202) are arranged at one ends of the first pneumatic spray gun (201) and the second pneumatic spray gun (205), and air connection pipes (203) are arranged at the other ends of the first pneumatic spray gun (201) and the second pneumatic spray gun (205). 3.The dust-proof composite sensor for a coal ventilator according to claim 1, characterized in that: the dust sensing assembly further comprises a reflector (108); a reflector mounting seat (109) is arranged above the box body (100), the reflector mounting seat (109) is located above the photosensitive element (102), a reflector sliding groove (110) is formed in the reflector mounting seat (109), and the reflector (108) is slidably connected to the reflector sliding groove (110). 4.The dust-proof composite sensor for a coal ventilator according to claim 3, characterized in that: ​ The box (100) is provided with a plurality of groups of air inlet holes (301) on one side, and air inlet light shielding covers (302) are arranged outside the air inlet holes (301).

5. The dustproof composite sensor for a coal ventilator according to claim 4, characterized in that: The box (100) is provided with a bug screen (304) on the side close to the air inlet hole (301), and a bug screen sliding groove (305) is arranged on the inner wall of the box (100) close to the air inlet hole (301), and the bug screen (304) is in sliding connection with the bug screen sliding groove (305).

6. The dustproof composite sensor for a coal ventilator according to claim 5, characterized in that: The box (100) is provided with a fan mounting port (306) on the side away from the air inlet hole (301), the fan mounting port (306) is provided with an air outlet fan (307), the air outlet fan (307) is provided with a fan light shielding cover (308), and the fan light shielding cover (308) and the air inlet light shielding cover (302) are both provided with secondary light shielding plates (303).

7. The dustproof composite sensor for a coal ventilator according to claim 1, characterized in that: The box (100) is provided with a control module (111), and the laser emitter (101), the photosensitive element (102) and the temperature sensing probe (401) are in electrical connection with the control module (111).

8. The dustproof composite sensor for a coal ventilator according to claim 7, characterized in that: The temperature sensing assembly further comprises sealing glue (404), the temperature sensing probe (401) and the insulating shell (402) are provided with the sealing glue (404), and two groups of electric wires (403) are connected to one end of the temperature sensing probe (401) in the insulating shell (402), and one end of the two groups of electric wires (403) is connected to the control module (111).

9. The dustproof composite sensor for a coal ventilator according to claim 1, characterized in that: The photosensitive element (102) is provided with a protection box (104) on the periphery, the protection box (104) is provided with a glass mounting sliding groove (105), and the glass mounting sliding groove (105) is in sliding connection with the glass plate (106).

10. The dustproof composite sensor for a coal ventilator according to claim 1, characterized in that: One side of the box (100) is provided with a box cover sliding groove (222), and the box cover (200) and the box (100) are in sliding connection through the box cover sliding groove (222).

Images