Belt conveyor protection device based on underground coal mine

Abstract

The invention discloses a belt conveyor protection device based on an underground coal mine. The belt conveyor protection device comprises a device shell, a protection host installed in the device shell, and a plurality of communication interfaces evenly distributed on the two sides of the protection host. A heat dissipation mechanism for protecting the cooling of the host is mounted on the back surface of the device shell; an air suction mechanism used for sucking away heat generated by working of the protection host is arranged in the device shell. A heat dissipation mechanism is additionally arranged on the back face of the device shell, heat absorption, ventilation and cooling are all carried out in a dustproof heat dissipation frame, dust and impurities are prevented from entering a protection host as much as possible, meanwhile, the temperature in the device shell can be effectively and rapidly reduced through negative pressure air suction and air inlet of an air exchange hole, and the situation that parts are damaged due to too high internal temperature is avoided; the working accuracy of the main machine and the service life of internal parts are guaranteed, and the operation safety of the belt conveyor is effectively protected and monitored.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine equipment protection devices, and in particular to a belt conveyor protection device based in an underground coal mine. Background Art

[0002] Belt conveyor, also known as rubber belt conveyor, has strong conveying capacity, long conveying distance, simple structure and easy maintenance, and can easily implement programmed control and automatic operation. The continuous or intermittent movement of the conveyor belt is used to transport items below 100KG or powdered or granular items. It runs at high speed, smoothly, with low noise, and can be transported up and downhill. In the production process of coal mines, belt conveyors are often used to transport collected coal, and coal mine conveyors need to be controlled by the belt conveyor centralized control master station. Once the belt conveyor fails, it needs to be controlled by the host to prevent safety incidents.

[0003] The existing protection devices for belt conveyors used in coal mines are mostly controlled by the main machine. The air circulation in the coal mine area is poor, and the main machine will generate heat when working for a long time. The lack of air circulation causes the heat to not dissipate quickly, which will affect the normal use of the main machine. In addition, there are many dust and impurities working in the coal mine area. Direct ventilation and heat dissipation can easily cause impurities to enter the main machine and affect its working accuracy and service life. For this reason, we provide a belt conveyor protection device based in coal mines to solve the above problems. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a belt conveyor protection device based in an underground coal mine, and adds a heat dissipation mechanism on the back of the device casing. Heat absorption, ventilation and cooling all occur in the dustproof heat dissipation frame, thereby avoiding dust and impurities from entering the protection host as much as possible. At the same time, the temperature inside the device casing can be effectively and quickly reduced through negative pressure suction and air intake through ventilation holes, thereby avoiding damage to components due to excessive internal temperature, ensuring the accuracy of the protection host and the service life of internal components, and effectively protecting and monitoring the safe operation of the belt conveyor.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts a belt conveyor protection device based on coal mines, which includes a device housing and a protection host installed in the device housing, a plurality of evenly distributed communication interfaces evenly distributed on both sides of the protection host, and an interactive interface for displaying the working status data of the belt conveyor and a protection button for controlling the belt conveyor installed on the front of the protection host: A heat dissipation mechanism for protecting the host from cooling is installed on the back of the above-mentioned device shell, and the heat dissipation mechanism includes a dust-proof heat dissipation frame, a negative pressure fan, a drive motor, a heat sink, a large air outlet, a small air outlet, a filtering mechanism, a heat pipe and a dust cover. The dust-proof heat dissipation frame is a rectangular frame with openings on both sides, one side is provided with an inspection door, and the other side is fixedly installed on the back of the device shell. The drive motor is installed at the center of the back of the device shell, and its output shaft is connected to the negative pressure fan. The heat pipes have a common root, are distributed in a 2×3 matrix, and are symmetrically arranged on both sides of the drive motor. The heat pipes connect the dust-proof heat dissipation frame and the device shell. The large air outlet and the small air outlet are respectively opened on two opposite side walls of the dust-proof heat dissipation frame. The heat sink is installed on the device shell and is distributed in a circular shape on the outside of the negative pressure fan. The dust cover covers the outside of the heat sink, and a plurality of air outlets are opened on the side facing the small air outlet; The inside of the device shell is provided with an air suction mechanism for sucking away the heat generated by the operation of the protection host.

[0006] As a further optimization of the above scheme, the protection host is an intrinsically safe programmable controller, and is externally connected to coal pile sensors, tension sensors, smoke sensors, temperature sensors for belt conveyors, tear sensors, deviation sensors, speed sensors, and mine explosion-proof solenoid valves through communication interfaces.

[0007] As a further optimization of the above solution, the working status data displayed on the interactive interface includes the operation data, fault location and fault information data of the belt conveyor, and the protection button includes a control button and a mining intrinsically safe emergency stop locking switch.

[0008] As a further optimization of the above solution, a handle is provided on the top of the device housing for workers to move and carry, and two supporting feet are provided on the bottom.

[0009] As a further optimization of the above scheme, filtering mechanisms are installed in the large air outlet and the small air outlet for filtering dust and coal ash, including a coal ash filter, a dust filter and a mounting ring. There are two sizes of the mounting ring, corresponding to the sizes of the large air outlet and the small air outlet respectively. The coal ash filter and the dust filter are layered and arranged side by side in the mounting circle, and the filter holes of the dust filter are relatively small.

[0010] As a further optimization of the above solution, a monitoring temperature sensor is installed on the inner wall of the device housing, and its output end is electrically connected to the input end of the protection host, and the input end of the drive motor is connected to the output end of the protection host.

[0011] As a further optimization of the above scheme, the air suction mechanism includes a horizontal axis, both ends of the horizontal axis are rotatably connected to two adjacent heat-conducting pipes, and fan blades are provided on the outer wall of the end of the heat-conducting pipe where the horizontal axis penetrates, a small bevel gear is provided in the middle of the horizontal axis, a large bevel gear is matched on one side of the small bevel gear, the large bevel gear is installed on the inner wall of the device shell through a rotating shaft, and an incomplete gear is provided at the lower part of the rotating shaft, and a linkage ring is matched on the outer side of the incomplete gear, teeth matching the incomplete gear are provided on both sides of the inner ring of the linkage ring, guide strips are slidably matched on both sides of the outer ring, and the guide strips are fixed on the inner wall of the device shell, two suction nozzles are provided on the upper and lower sides of the linkage ring, and the air duct of each suction nozzle is connected to the adjacent heat-conducting pipe through a hose.

[0012] As a further optimization of the above solution, a ventilation hole is opened on the back of the device shell, the ventilation hole connects the device shell and the dustproof and heat dissipation frame, and the ventilation hole is located on the side close to the small air outlet.

[0013] As a further optimization of the above solution, one-way valves are installed in the ventilation holes and the six heat-conducting pipes.

[0014] The belt conveyor protection device based on coal mine underground of the present invention has the following beneficial effects: The belt conveyor protection device based on coal mines of the present invention has a heat dissipation mechanism located on the back of the device shell, which plays four roles: first, the circulation exchange between the inside and outside air; second, the negative pressure fan sucks out the hot air in the device and dissipates the heat through the heat sink; third, due to the physical characteristic that the air enters the large hole and exits the small hole, the air will be cooled at the discharge point of the small hole, and the cooled air can be replaced into the inside of the device through the ventilation hole, which cools the working environment of the protection host to a certain extent; fourth, dust and impurities are prevented from entering the inside of the protection device. The above four roles ensure that the protection host can quickly perform air heat exchange to achieve heat dissipation, and no impurities enter the inside, thereby preventing the internal components from being damaged due to excessive temperature, extending the service life of the internal components, ensuring the accuracy of the work of the protection host components, and effectively monitoring and protecting the operation of the belt conveyor; In the belt conveyor protection device for underground coal mines of the present invention, the heat pipe has two functions: one is to connect the dustproof heat dissipation frame and the device housing; the other is to serve as a connecting component between the heat dissipation mechanism and the air suction mechanism, and to become a negative pressure fan to suck air out of the heat pipe under negative pressure to form an airflow, drive the fan blades to rotate, and is the power generation place of the air suction mechanism; The belt conveyor protection device based on the coal mine of the present invention, the air suction mechanism cleverly uses the airflow passing through the heat conduction pipe as power to drive the fan blades and the horizontal axis to rotate, and the position of the air suction nozzle can be adjusted without the need for additional energy supply, which is convenient for the hot air in the entire device shell to be sucked out, saving energy, and when adjusting, the wind speed of the negative pressure fan is automatically adjusted according to the internal temperature, thereby affecting the rotation speed of the horizontal axis, so that the higher the temperature, the faster the position movement speed of the air suction nozzle, the faster the outflow of hot air at different heights can be achieved, and the heat dissipation efficiency is further improved; The belt conveyor protection device based on underground coal mines of the present invention is provided with filtering devices at both the large air outlet and the small air outlet, and is a double-layer filtering structure. Dust covers are also provided on the outside of the negative pressure fan and the heat sink, which can effectively reduce the impurities in the mining area from entering the dustproof heat dissipation frame, and an inspection door is provided on the back of the dustproof heat dissipation frame to facilitate the staff to regularly clean the heat dissipation mechanism.

[0015] With reference to the following description and drawings, a specific embodiment of the present invention is disclosed in detail, indicating the manner in which the principle of the present invention can be adopted. It should be understood that the scope of the embodiment of the present invention is not limited thereby, and the embodiment of the present invention includes many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 This is a rear axonometric view of the present invention without the obstruction of the inspection door; Figure 3 This is a schematic diagram of the back structure of the present invention without the obstruction of the inspection door; Figure 4 It is a top view of the heat dissipation mechanism and the air suction mechanism in the present invention; Figure 5 for Figure 4 A in the enlarged view; Figure 6 It is a schematic diagram of the matching structure between the linkage ring of the air suction mechanism and the incomplete gear in the present invention; Figure 7 It is a front view of the air suction mechanism in the present invention; Figure 8 It is a circuit control diagram of the present invention.

[0017] In the figure: 1. device casing; 2. protect the host; 3. heat dissipation mechanism; 31. dust-proof heat dissipation frame; 32. negative pressure fan; 33. drive motor; 34. heat sink; 35. large air outlet; 36. small air outlet; 37. filtering mechanism; 371. coal ash filter; 372. dust filter; 373. mounting ring; 38. heat pipe; 39. dust cover; 4. suction mechanism; 41. horizontal axis; 42. fan blade; 43. small bevel gear; 44. large bevel gear; 45. incomplete gear; 46. linkage ring; 47. guide strip; 48. suction nozzle; 5. ventilation hole; 6. detection door; 7. monitoring temperature sensor; 8. protection button; 9. interactive interface; 10. handle; 11. communication interface; 12. support foot. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0019] It should be noted that when an element is referred to as being "disposed on, provided with" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected, connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. "Fixed connection" means a fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this article. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0021] Embodiment 1

[0022] Reference Figures 1 to 2 and Figure 8The present invention provides a technical solution: a belt conveyor protection device based on an underground coal mine, comprising a device housing 1 and a protection host 2 installed in the device housing 1, a plurality of communication interfaces 11 evenly distributed on both sides of the protection host 2, an interactive interface 9 for displaying the working status data of the belt conveyor is installed on the front of the protection host 2, including the operation data, fault location and fault information data of the belt conveyor, and a protection button 8 for controlling the belt conveyor is arranged on the front, including a control button and a mine intrinsically safe emergency stop locking switch, a handle 10 for staff to move and carry is arranged on the top of the device housing 1, and two supporting feet 12 are arranged on the bottom; the protection host 2 is an intrinsically safe programmable controller, and is externally connected to a coal pile sensor, a tension sensor, a smoke sensor, a belt conveyor temperature sensor, a tear sensor, a deviation sensor, a speed sensor, and a mine flameproof solenoid valve through the communication interface 11, and the programmable controller facilitates the staff to adjust the protection parameters according to the different operating states of the underground coal mine belt conveyor.

[0023] Reference Figures 2 to 3 A heat dissipation mechanism 3 for protecting the host 2 from cooling is installed on the back of the device housing 1, which can reduce the temperature inside the device housing 1 so that the host 2 can work within a suitable temperature range, thereby ensuring the accuracy of the work; a ventilation hole 5 is opened on the inner wall of the device housing 1, and the ventilation hole 5 connects the device housing 1 and the dust-proof heat dissipation frame 31, and the ventilation hole 5 is located on the side close to the small air outlet 36, which is used to supplement the air in the device housing 1 and balance the internal air pressure.

[0024] Reference Figures 2 to 4The heat dissipation mechanism 3 includes a dust-proof heat dissipation frame 31, a negative pressure fan 32, a drive motor 33, a heat sink 34, a large air outlet 35, a small air outlet 36, a filter mechanism 37, a heat pipe 38 and a dust cover 39. The dust-proof heat dissipation frame 31 is a rectangular frame with openings on both sides. One side is provided with an inspection door 6 to facilitate the inspection of the heat dissipation mechanism 3, and the other side is fixedly installed on the back of the device housing 1. The drive motor 33 is installed at the center of the back of the device housing 1, and its output shaft is connected to the negative pressure fan 32. There are 6 heat pipes 38, which are distributed in a 2X3 matrix and symmetrically arranged on both sides of the drive motor 33. The heat pipes 38 connect the dust-proof heat dissipation frame 31 and the device housing 1. The large air vents 35 and the small air vents 36 are respectively provided on two opposite side walls of the dustproof and heat dissipation frame 31; the heat sink 34 is mounted on the device housing 1 and is distributed in a circular shape on the outside of the negative pressure fan 32; the dust cover 39 covers the outside of the heat sink 34 and has a plurality of air outlets on the side facing the small air vents 36; the outflow from the small air vents 36 will reduce the air temperature, which is a physical cooling method for the air. The principle is that the air in the dustproof and heat dissipation frame 31 has more air intake and less air outlet, the pressure increases, and the thermal conductivity of the hole wall of the small air vents 36 increases. Due to the heat dissipation of the small hole wall, the air passing through the small air vents 36 is slowed down and cooled, so that the air temperature in the dustproof and heat dissipation frame 31 is reduced.

[0025] Reference Figure 4 A filtering mechanism 37 is installed in both the large air outlet 35 and the small air outlet 36 for filtering dust and coal ash, including a coal ash filter 371, a dust filter 372 and a mounting ring 373. The mounting ring 373 has two sizes, corresponding to the sizes of the large air outlet 35 and the small air outlet 36 respectively. The coal ash filter 371 and the dust filter 372 are layered and arranged side by side in the mounting ring 373, and the filter pores of the dust filter 372 are relatively small, which can effectively block larger particles of coal ash and smaller dust outside the dustproof and heat dissipation frame 31.

[0026] The belt conveyor protection device provided in this embodiment is based on the coal mine, and the working process is as follows: When working, the device is convenient to carry by the handle 10 on the belt conveyor. After arriving at the working area of ​​the coal mine, the communication interface 11 is connected to the monitoring belt conveyor. When working, the protection host 2 will generate heat. The setting of the monitoring temperature sensor 7 can monitor the internal temperature of the device shell 1. When the set temperature range that needs heat dissipation is reached, the protection host 2 will send a signal to the negative pressure fan 32 to suck the high-temperature air into the dust-proof heat dissipation frame 31 through the heat pipe 38. As the working temperature of the protection host 2 continues to rise, the protection host 2 will send a signal to the negative pressure fan 32 to make its speed gradually faster as the temperature rises, and quickly suck the hot air out with negative pressure through the heat pipe 38. The hot air sucked into the dust-proof heat dissipation frame 31 first passes through the heat sink 34 for heat dissipation, and then is discharged from the dust cover 39 and from The small air vent 36 is used to discharge the outside air, while the outside air flows into the dustproof heat dissipation frame 31 through the large air vent 35. The two air streams finally flow out through the small air vent 36 to cool the air in the dustproof heat dissipation frame 31. During the air suction process of the negative pressure fan 32, in order to maintain the air pressure balance in the device casing 1, after the air in the device casing 1 is sucked out, the air in the dustproof heat dissipation frame 31 will be replaced into the device casing 1 through the air exchange hole 5. Firstly, it plays a role in maintaining the internal air pressure balance, and secondly, it plays a role in replacing the low-temperature air in the dustproof heat dissipation frame 31 into the device casing 1, which plays a cooling role to a certain extent. The above method can quickly realize the cooling of the working environment of the protection host 2, avoid damage to components caused by high temperature, ensure the working accuracy of the protection host 2, and effectively monitor and protect the operation of the belt conveyor.

[0027] Embodiment 2

[0028] Reference Figures 5 to 7, which is different from the first embodiment, an air suction mechanism 4 for absorbing the heat generated by the main unit 2 during operation is provided inside the device housing 1. The air suction mechanism 4 includes a horizontal axis 41, the two ends of which are rotatably connected to two adjacent heat conducting pipes 38, and fan blades 42 are provided on the outer wall of the end of the horizontal axis 41 that penetrates the heat conducting pipe 38, a small bevel gear 43 is provided in the middle of the horizontal axis 41, a large bevel gear 44 is matched on one side of the small bevel gear 43, the large bevel gear 44 is mounted on the inner wall of the device housing 1 through a rotating shaft, and an incomplete gear 45 is provided at the lower part of the rotating shaft, the outer side of the incomplete gear 45 is matched with a linkage ring 46, and teeth matching with the incomplete gear 45 are provided on both sides of the inner ring of the linkage ring 46, the teeth of the incomplete gear 45 occupy one third of the inner circle of the gear, and can be moved up and down by matching with the linkage ring 46 during the rotation process, and the outer ring Guide strips 47 are slidably fitted on both sides, and the guide strips 47 are fixed on the inner wall of the device housing 1. Two suction nozzles 48 are arranged on the upper and lower sides of the linkage ring 46. The air duct of each suction nozzle 48 is connected to the adjacent heat conducting pipe 38 through a hose, and the connecting position is the pipe mouth. The four connected heat conducting pipes 38 can only suck in and discharge the hot air through the suction nozzle 48 at this time. During the up and down movement of the linkage ring 46, the hot air at different heights can be sucked in and discharged into the dustproof heat dissipation frame 31. The air exchange hole 5 and the six heat conducting pipes 38 are equipped with a one-way valve to avoid the backflow of air, effectively control the cycle of hot out and cold in of air, realize the effective cooling protection of the working environment of the host 2, and further improve the heat dissipation efficiency on the basis of the first embodiment.

[0029] The belt conveyor protection device provided in this embodiment is based on the coal mine, and the working process is as follows: As the temperature in the device housing 1 gradually increases, the protection host 2 analyzes and sends a signal to the negative pressure fan 32 based on the received signal of the monitoring temperature sensor 7, so that the wind speed of the negative pressure fan 32 gradually increases, and the hot air in the device housing 1 can be sucked out by negative pressure through the heat pipe 38 more quickly. The airflow forms an outward airflow in the heat pipe 38, and the airflow passes through the fan blades 42, which will drive them to rotate. When the rotation speed is slow, the hot air in the device housing 1 is mainly discharged outward through the two heat pipes 38 in the middle. As the rotation speed gradually increases, the fan blades will rotate with the horizontal shaft 41, and the small bevel gear 43 on the horizontal shaft 41 will rotate accordingly, thereby driving the large bevel gear 44 to rotate, and the incomplete During the rotation of the full gear 45 and the linkage ring 46, the incomplete teeth on the incomplete gear 45 will drive the linkage ring 46 to move one side upward and the other side downward, thereby realizing up and down reciprocating movement. During the reciprocating movement, the suction nozzle 48 on the linkage ring 46 can move up and down, so that the hot air at each height can be sucked in, passed through the hose and the heat conducting pipe 38, and finally sucked to the heat sink 34 by the negative pressure fan 32, and flows from the dust cover 39 to the small air outlet 36, and is discharged from the dustproof heat dissipation frame 31, so as to quickly realize the reduction of the temperature in the entire device casing 1, further improve the heat dissipation efficiency of the hot air in the device casing 1 on the basis of the first embodiment, and further ensure the accuracy of protecting the host 2.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A belt conveyor protection device based on underground coal mines, characterized in that: The invention comprises a device housing (1) and a protection host (2) installed in the device housing (1), wherein the protection host (2) is an intrinsically safe programmable controller and has multiple communication interfaces (11) installed on both sides of the device housing (1) connected at equal intervals on both sides, and an interactive interface (9) for displaying working status data of a belt conveyor, including operating data, fault location and fault information data of the belt conveyor, and a protection button (8) for controlling the belt conveyor is installed on the front of the protection host (2): A heat dissipation mechanism (3) for protecting the host (2) from cooling is installed on the back of the device housing (1). The heat dissipation mechanism (3) comprises a dustproof heat dissipation frame (31), a negative pressure fan (32), a drive motor (33), a heat sink (34), a large air outlet (35), a small air outlet (36), a filter mechanism (37), a heat pipe (38) and a dust cover (39). The dustproof heat dissipation frame (31) is a rectangular frame with openings on both sides, one side of which is provided with an inspection door (6) and the other side is fixedly installed on the back of the device housing (1). The drive motor (33) is installed at the center of the back of the device housing (1). Its output The shaft is connected to the negative pressure fan (32); there are 6 heat pipes (38) distributed in a 2×3 matrix and symmetrically arranged on both sides of the drive motor (33); the heat pipes (38) are connected to the dustproof heat dissipation frame (31) and the device housing (1); the large air outlet (35) and the small air outlet (36) are respectively opened on two opposite side walls of the dustproof heat dissipation frame (31); the heat sink (34) is installed on the device housing (1) and is distributed in a circular shape on the outside of the negative pressure fan (32); the dust cover (39) covers the outside of the heat sink (34) and has a plurality of air outlets on the side facing the small air outlet (36); An air suction mechanism (4) is provided inside the housing (1) of the device for sucking away heat generated by the operating protection host (2).

2. The belt conveyor protection device based on coal mine in claim 1 is characterized in that: The protection host (2) is externally connected to a coal pile sensor, a tension sensor, a smoke sensor, a temperature sensor for a belt conveyor, a tear sensor, a deviation sensor, a speed sensor, and a mine flameproof solenoid valve via a communication interface (11).

3. The belt conveyor protection device based on coal mine in claim 2 is characterized in that: The protection button (8) comprises a control button and a mine-use intrinsically safe emergency stop locking switch.

4. The belt conveyor protection device based on coal mine in claim 3 is characterized in that: The top of the device housing (1) is provided with a handle (10) for workers to move and carry, and the bottom is provided with two supporting feet (12).

5. The belt conveyor protection device based on coal mine in accordance with claim 4 is characterized in that: The large air outlet (35) and the small air outlet (36) are both provided with a filtering mechanism (37) for filtering dust and coal ash, comprising a coal ash filter (371), a dust filter (372) and a mounting ring (373). The mounting ring (373) has two sizes, which correspond to the sizes of the large air outlet (35) and the small air outlet (36), respectively. The coal ash filter (371) and the dust filter (372) are layered and arranged side by side in the mounting ring (373), and the filter holes of the dust filter (372) are relatively small.

6. The belt conveyor protection device based on coal mine in accordance with claim 5 is characterized in that: A monitoring temperature sensor (7) is installed on the inner wall of the device housing (1), the output end of which is electrically connected to the input end of the protection host (2), and the input end of the drive motor (33) is connected to the output end of the protection host (2).

7. The belt conveyor protection device based on coal mine in claim 6 is characterized by: The air suction mechanism (4) comprises a transverse shaft (41), the two ends of the transverse shaft (41) are rotatably connected to two adjacent heat conducting pipes (38), and a fan blade (42) is arranged on the outer wall of the end of the transverse shaft (41) that penetrates into the heat conducting pipe (38), a small bevel gear (43) is arranged in the middle of the transverse shaft (41), a large bevel gear (44) is matched with one side of the small bevel gear (43), and the large bevel gear (44) is mounted on the inner wall of the device housing (1) via a rotating shaft, and the lower part of the rotating shaft An incomplete gear (45) is provided, and a linkage ring (46) is matched on the outer side of the incomplete gear (45). Teeth matching the incomplete gear (45) are provided on both sides of the inner ring of the linkage ring (46). Guide strips (47) are slidably matched on both sides of the outer ring, and the guide strips (47) are fixed on the inner wall of the device housing (1). Two air suction nozzles (48) are provided on the upper and lower sides of the linkage ring (46), and the air duct of each air suction nozzle (48) is connected to a nearby heat conduction pipe (38) through a hose.

8. The belt conveyor protection device for underground coal mines according to claim 7 is characterized in that: A ventilation hole (5) is provided on the back of the device housing (1), the ventilation hole (5) is connected to the device housing (1) and the dustproof heat dissipation frame (31), and the ventilation hole (5) is located on a side close to the small air outlet (36).

9. The belt conveyor protection device based on coal mine in claim 8 is characterized in that: One-way valves are installed in the ventilation holes (5) and the six heat conducting pipes (38).

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