Mine air supply heating device

Abstract

The invention discloses a mine air supply heating device, relates to the technical field of mine air supply, and aims to solve the technical problem that a traditional mine air supply device is difficult to consider the overall and local requirements, and the mine air supply heating device comprises a case, an air filtering system, an air supply adjusting mechanism, a driving assembly, a guide assembly and a gain assembly, the driving assembly drives the adjusting frame and the inner frame to horizontally move towards the outer side or the inner side, layered diffusion type uniform air supply is formed when the guide vane shaft rotates towards the outer side, the requirement for overall environment adjustment of an underground main roadway and other crowded areas can be met, and it is ensured that heated air evenly covers a large-range space; when the guide blades rotate towards the inner side, gathering type directional concentrated air supply is formed, and the key heating or ventilation problem of local areas such as a tunneling face can be solved in a targeted mode; and meanwhile, the guiding assembly is matched to guide the gathering type air supply direction, the air supply accuracy and applicability are further improved, and the environment adjusting requirements of different areas of the mine are effectively met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine air supply, more particularly to a mine air supply heating device. BACKGROUND

[0002] The mine operation environment has particularity, and strict requirements are put forward for the function and adaptability of the air supply heating device; from the operation area demand, the underground main roadway needs to adjust the overall environment as the main channel for personnel and equipment, which requires that the heated air can uniformly cover a large range of space to avoid obvious temperature difference in local area affecting the operation comfort; while the local area such as the driving face and the maintenance point often needs to be heated or ventilated, and the heat or fresh air needs to be delivered to the target position; at the same time, there are problems such as high dust, narrow space, high humidity and limited maintenance conditions in the mine, which puts forward higher requirements for the dustproof sealing performance, compact structure and stable operation of the device, which not only prevents dust from entering the transmission parts to cause failure, but also adapts to the limited installation space and reduces the maintenance frequency. At present, the existing mine air supply heating device cannot fully meet the above requirements; in the air supply mode, most of the devices can only realize single air supply mode, either only large-scale air supply but cannot guarantee uniformity, or only directional air supply but difficult to cover a large area, which cannot meet the overall adjustment of the underground main roadway and the local demand of the driving face, resulting in low adjustment efficiency in some areas; in the air supply direction control, the directional accuracy of the existing device is insufficient, and it is difficult to flexibly adjust the air flow direction when gathering air supply, which cannot accurately cover the target area, and the air flow velocity is limited, which affects the improvement speed of the local environment, therefore, we propose a mine air supply heating device. SUMMARY

[0003] The purpose of the present application is to provide a mine air supply heating device to solve the technical problem that the traditional mine air supply device cannot meet the overall and local demand.

[0004] To solve the above technical problems, the present application provides the following technical scheme: a mine air supply heating device, comprising a machine case with an air supply system, an air filter system with a heating element arranged inside the machine case, an air supply adjustment mechanism and a driving assembly arranged at the end of the machine case, a guide assembly and a gain assembly arranged inside the machine case, the air supply adjustment mechanism comprises an outer frame fixedly sleeved at one end of the machine case, a plurality of adjustment frames are slidably matched inside the outer frame, and one of the adjustment frames is slidably matched with an inner frame, a plurality of guide vanes are rotatably connected in square array inside the outer frame, the adjustment frame and the inner frame; The adjusting frame and inner frame are translated inward or outward via a drive assembly. When translating outward, the guide vanes rotate axially outward, causing the airflow to diffuse in all directions, enabling layered, diffused, and uniform air delivery. This is suitable for densely populated areas such as underground mine tunnels that require overall environmental control. When translating inward, the guide vanes rotate axially inward, causing the airflow to converge towards the center, enabling concentrated, directional air delivery. This is suitable for localized areas requiring focused heating or ventilation, such as the tunnel face. Furthermore, the guide assembly guides the direction of the concentrated air delivery. This invention drives the adjusting frame and inner frame to translate outward or inward via a drive assembly, which can also drive the guide vanes... The blades can rotate outward or inward, allowing for flexible switching between two air supply modes. When rotating outward, they create a layered, diffused, and uniform air supply, meeting the overall environmental regulation needs of densely populated areas such as underground roadways and ensuring that heated air evenly covers a large area. When rotating inward, they create a concentrated, directional air supply, which can specifically address key heating or ventilation issues in localized areas such as the tunneling face. Simultaneously, the guide components can guide the direction of the concentrated air supply, further improving the accuracy and applicability of the air supply and effectively adapting to the environmental regulation needs of different areas in the mine.

[0005] Preferably, the air supply adjustment mechanism further includes several limiting plates, which are diagonally distributed and fixedly connected to the surfaces of the outer frame, the adjustment frame, and the inner frame. Several mounting plates are fixedly connected to the surfaces of the adjustment frame and the inner frame in a linear array. Each mounting plate has a transmission rod hinged to its end, and the transmission rod is hinged to the guide vane.

[0006] Preferably, the drive assembly includes a plurality of sealing plates, which are diagonally distributed and fixedly connected to the surfaces of the adjustment frame and the inner frame. A plurality of air pressure shells are diagonally distributed and fixedly connected inside the outer frame and the adjustment frame, and the sealing plates are slidably adapted to the air pressure shells.

[0007] Preferably, the guide assembly includes a duct that is movably fitted inside the inner frame, and a pneumatic slider is fixedly connected to the surface of the duct in a symmetrical structure.

[0008] Preferably, one side of the inner frame is symmetrically connected to an arc-shaped slide rail, and the arc-shaped slide rail is slidably adapted to the pneumatic slider. The bottom inner wall of the chassis is symmetrically connected to a support rod with a ball joint.

[0009] Preferably, each of the support rods is movably fitted with a first spring, and each of the support rods is fitted with an adjusting rod, which is in movable contact with the first spring. A fixing frame is fixedly fitted onto the end surface of the air duct, and the fixing frame is connected to the ball head of the adjusting rod.

[0010] Preferably, the gain assembly comprises a plurality of arc-shaped blocks fixedly connected in a ring array at the end of the air pipe, and each of the arc-shaped blocks is hingedly connected with an arc-shaped sandwich plate at one end.

[0011] Preferably, the end of the air pipe is arranged with micro servo motors in a ring array, and the output ends of the micro servo motors are in transmission connection with the movable rods.

[0012] Preferably, the inner walls on both sides of each arc-shaped sandwich plate are rotationally connected with winding rods, and the winding rods pass through the arc-shaped sandwich plates at one end.

[0013] Preferably, the inside of each arc-shaped sandwich plate is arranged with a disc spring, and the disc spring is in elastic torque transmission adaptation with the winding rod.

[0014] Compared with the prior art, the present application has the following advantages: 1. The driving assembly drives the adjustment frame and the inner frame to translate outwardly or inwardly, which can drive the guide vane to rotate axially outwardly or axially inwardly, so as to realize flexible switching of two air supply modes.

[0015] 2. The present application realizes flexible switching of air supply modes and adapts to different mine scene requirements.

[0016] 3、The application realizes accurate and stable air supply control, convenient operation and high adjustment efficiency; the driving assembly is in sealed sliding fit with the sealing piece through the air pressure shell, and is driven by gas filling or discharging to adjust the translation of the adjustment frame and the inner frame, the transmission process is free of mechanical jamming, and the sealing structure can adapt to the harsh environment of mine dust and humidity, reducing the risk of failure; at the same time, the guiding assembly is in sliding fit with the arc-shaped slide rail through the pneumatic sliding block, the direction of the air pipe jet flow can be flexibly adjusted, the stability of the air pipe during angle adjustment is ensured by the elastic support of the supporting rod and the first spring; the gain assembly is driven by the miniature servo motor to open the arc-shaped interlayer plate to form a horn-shaped structure, combined with the sealing and rolling design of the wind-shielding fiber cloth, the airflow velocity can be increased by using the Venturi principle, and the air supply direction can be accurately guided by changing the structure form, the overall adjustment response is rapid and the control precision is high.

[0017] 4、The structure design of the application is adapted to the special environment of the mine, and the practicability and reliability are high, the core transmission parts of the device (such as the sealed fit of the air pressure shell and the sealing piece, the sealed connection of the arc-shaped interlayer plate and the wind-shielding fiber cloth) are all designed to be sealed, which can effectively prevent mine dust from entering the transmission mechanism and reduce wear; the driving mode mainly uses air pressure and servo motor, without complex mechanical transmission, which is suitable for the scene of limited space and harsh maintenance conditions in the mine; in addition, the design of the air filtration system filtering impurities first and then heating can avoid dust adhering to the heating element to affect the efficiency or cause safety hazards, and the layer-by-layer folding structure of the wind-shielding fiber cloth can not only expand to form a sealed flow guide surface during air supply, but also can be compactly stored when not in use, which takes into account the functionality and space adaptability, significantly improving the long-term stable operation ability of the device in the complex environment of the mine. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the application; Figure 2 is a schematic diagram of the three-dimensional structure of the application, showing the three-dimensional structure inside the case; Figure 3 is a schematic diagram of the three-dimensional local structure of the air supply adjustment mechanism of the application; Figure 4 is a schematic diagram of the three-dimensional local structure of the air supply adjustment mechanism of the application; Figure 3 is a schematic diagram of the enlarged structure at A in the air supply adjustment mechanism of the application; Figure 5 is a schematic diagram of the three-dimensional exploded structure of the air supply adjustment mechanism of the application; Figure 6 is a schematic diagram of the three-dimensional exploded structure of the air supply adjustment mechanism of the application, showing the three-dimensional structure of the adjustment frame; Figure 7 is a schematic diagram of the three-dimensional local structure of the air supply adjustment mechanism of the application, showing the three-dimensional structure of the transmission rod; Figure 8 is a schematic diagram of the three-dimensional structure of the guiding assembly of the application; Figure 9 This is a three-dimensional structural diagram of the gain component of the present invention; Figure 10 This is a three-dimensional exploded view of the guide component of the present invention; Figure 11 This is a schematic diagram of a three-dimensional partial structure of the gain component of the present invention; Figure 12 This is a three-dimensional magnified schematic diagram of the gain component of the present invention.

[0019] The following are the labeling instructions in the diagram: 1. Chassis; 11. Air filtration system; 2. Air supply adjustment mechanism; 21. Outer frame; 22. Adjustment frame; 23. Inner frame; 24. Guide vane; 25. Limiting plate; 26. Mounting plate; 27. Transmission rod; 3. Drive assembly; 31. Sealing plate; 32. Air pressure shell; 4. Guide assembly; 41. Air duct; 42. Pneumatic slider; 43. Arc-shaped slide rail; 44. Support rod; 45. First spring; 46. Adjustment rod; 47. Fixing frame; 5. Gain assembly; 51. Arc-shaped block; 52. Arc-shaped sandwich plate; 53. Movable rod; 54. Miniature servo motor; 55. Hinge frame; 56. Rewinding rod; 57. Circular disc; 58. Disc spring; 59. Windproof fiber cloth. Detailed Implementation

[0020] like Figures 1-8 As shown, the present invention relates to a mine ventilation heating device, comprising a housing 1 with a ventilation system, an air filtration system 11 with heating elements arranged inside the housing 1, a ventilation adjustment mechanism 2 and a drive assembly 3 arranged at the end of the housing 1, and a guide assembly 4 and a gain assembly 5 arranged inside the housing 1.

[0021] It is worth noting that the air filtration system 11 is a conventional technology and will not be described in detail here. It is used to filter impurities in the air and to heat the air.

[0022] The air supply adjustment mechanism 2 includes an outer frame 21, which is fixedly sleeved on one end of the housing 1. Several adjustment frames 22 are slidably adapted inside the outer frame 21, and two adjacent adjustment frames 22 are slidably adapted. An inner frame 23 is slidably adapted inside one of the adjustment frames 22. Several guide vanes 24 are rotatably connected in a square array inside the outer frame 21, adjustment frame 22, and inner frame 23. Several limiting pieces 25 are fixedly connected in a diagonal distribution on the surfaces of the outer frame 21, adjustment frame 22, and inner frame 23. Several mounting pieces 26 are fixedly connected in a linear array on the surfaces of the adjustment frame 22 and inner frame 23. A transmission rod 27 is hinged to the end of each mounting piece 26, and the transmission rod 27 is hinged to the guide vane 24.

[0023] Specifically, when the adjusting frame 22 and the inner frame 23 translate outward, the plurality of guide vanes 24 are driven to rotate axially outward by the transmission rod 27, so that stratified diffusion type uniform air supply is realized, which is suitable for personnel-intensive and overall environment adjustment areas such as underground large lanes; when the adjusting frame 22 and the inner frame 23 translate inward, the plurality of guide vanes 24 are driven to rotate axially inward by the transmission rod 27, so that the concentrated directional air supply is realized, which is suitable for local areas such as heading faces that need to be heated or ventilated.

[0024] As shown in Figures 5-6 and Figure 8 , the drive assembly 3 includes a plurality of sealing sheets 31, the plurality of sealing sheets 31 are fixedly connected in diagonal distribution on the surfaces of the adjusting frame 22 and the inner frame 23, a plurality of gas pressure shells 32 are fixedly connected in diagonal distribution on the inside of the outer frame 21 and the adjusting frame 22, and the sealing sheets 31 are sealingly and slidingly fitted in the gas pressure shells 32.

[0025] Specifically, by filling or discharging gas in the gas pressure shell 32, the sealing sheet 31 is driven to slide left and right in the gas pressure shell 32, so as to drive the adjusting frame 22 and the inner frame 23 to translate outward or inward.

[0026] The present application realizes flexible switching of air supply mode and adapts to different mine scene requirements; through the inner and outer translation of the adjusting frame 22 and the inner frame 23 of the air supply adjusting mechanism 2, the axial reciprocating rotation of the guide vane driven by the transmission rod 27, the switching of the two modes of "stratified diffusion type uniform air supply" and "concentrated directional air supply" can be accurately realized. When used in personnel-intensive overall environment adjustment areas such as underground large lanes, diffusion type air supply can evenly cover a large range of space after heating, avoiding excessive local temperature difference; and for local key areas such as heading faces, the concentrated air supply can direct the heat or fresh air to the target position, improving the local environment adjustment efficiency, solving the problem that the traditional mine air supply device cannot meet the overall and local requirements.

[0027] As shown in Figures 8-10 , the guide assembly 4 includes a wind pipe 41 movably sleeved in the inner frame 23, the wind pipe 41 is fixedly connected with a pneumatic slide block 42 in a symmetrical structure on the surface, the inner frame 23 is fixedly connected with an arc-shaped slide rail 43 in a symmetrical structure on one side, and the arc-shaped slide rail 43 is slidingly matched with the pneumatic slide block 42, the bottom inner wall of the case 1 is ball-jointedly connected with a support rod 44 in a symmetrical structure, the first spring 45 is movably sleeved in each support rod 44, the adjusting rod 46 is sleeved in each support rod 44, and the adjusting rod 46 is movably contacted with the first spring 45, the fixed frame 47 is fixedly sleeved on the surface of the end of the wind pipe 41, and the fixed frame 47 is ball-jointedly connected with the adjusting rod 46.

[0028] Specifically, in the converging directional concentrated air supply, the jet direction of the air pipe 41 is adjusted by sliding the pneumatic slider 42 on the arc-shaped slide rail 43, and the airflow flows through the air pipe 41, and the airflow speed in the air pipe 41 is increased by the Venturi principle, so as to guide the converging airflow.

[0029] As shown in Figure 9 and Figures 11-12 The gain assembly 5 includes a plurality of arc-shaped blocks 51 fixedly connected in a ring array at the end of the air pipe 41, each arc-shaped block 51 is hingedly connected with an arc-shaped interlayer plate 52, the end of the air pipe 41 is hingedly connected with a plurality of movable rods 53 in a ring array, the end of the air pipe 41 is arranged with a plurality of micro servo motors 54 in a ring array, and the output end of the micro servo motor 54 is drivingly connected with the movable rod 53, each arc-shaped interlayer plate 52 is fixedly connected with a hinged frame 55 on the surface, and the hinged frame 55 is slidingly connected with the movable rod 53 inside, each arc-shaped interlayer plate 52 is rotatably connected with a winding rod 56 on the inner wall on both sides, and the winding rod 56 penetrates through the arc-shaped interlayer plate 52 at one end, each arc-shaped interlayer plate 52 is fixedly connected with a circular disc 57 at one end, and the circular disc 57 is sleeved on the end surface of the winding rod 56, each circular disc 57 is arranged with a disc spring 58 inside, and the disc spring 58 is elastically torque-transferring matched with the winding rod 56, and each winding rod 56 is wound with a wind-shielding fiber cloth 59 in a layer-by-layer overlapping manner on the surface, and the wind-shielding fiber cloth 59 penetrates through the arc-shaped interlayer plate 52, and the end of the wind-shielding fiber cloth 59 is fixedly connected with the adjacent arc-shaped interlayer plate 52.

[0030] Specifically, in the converging directional concentrated air supply, the jet direction of the air pipe 41 is adjusted by sliding the pneumatic slider 42 on the arc-shaped slide rail 43, and the airflow flows through the air pipe 41, and the airflow speed in the air pipe 41 is increased by the Venturi principle, so as to guide the converging airflow.

[0031] The present application realizes precise and stable air supply control, convenient operation and high adjustment efficiency. The driving assembly 3 is sealingly and slidingly matched with the sealing sheet 31 through the gas pressure shell 32, and fills or discharges gas as power to drive the adjustment frame 22 and the inner frame 23 to translate, and the transmission process has no mechanical jamming, and the sealing structure can adapt to the harsh environment of mine dust and humidity, and reduce the risk of failure. At the same time, the guiding assembly 4 is slidingly matched with the pneumatic slider 42 and the arc-shaped slide rail 43, and can flexibly adjust the jet direction of the air pipe 41, and the stability of the air pipe 41 during angle adjustment is ensured by the elastic support of the supporting rod 44 and the first spring 45; the gain assembly 5 drives the arc-shaped interlayer plate 52 to open to form a horn-shaped structure through the micro servo motor 54, and combines the sealing and winding design of the wind-shielding fiber cloth, which can not only increase the airflow speed by the Venturi principle, but also accurately guide the air supply direction by the structural form change, and the overall adjustment response is rapid and the control precision is high.

[0032] The structural design of the present application is adapted to the special environment of the mine, and has strong practicability and reliability. The core transmission components (such as the sealing cooperation of the air pressure shell 32 and the sealing sheet 31, and the sealing connection of the arc-shaped interlayer plate 52 and the wind-shielding fiber cloth 59) are all designed to be sealed, which can effectively block the mine dust from entering the transmission mechanism and reduce wear and tear. The driving mode mainly uses air pressure and a servo motor, without the need for complex mechanical transmission, which is suitable for the scene of limited space and harsh maintenance conditions in the mine. In addition, the design of the air filtering system 11, which filters impurities first and then heats, can avoid dust adhering to the heating element to affect efficiency or cause safety hazards. The layer-by-layer overlapping and rolling structure of the wind-shielding fiber cloth 59 can not only expand to form a sealed flow guide surface when air is sent, but also can be compactly stored when not in use, which takes into account the functionality and spatial adaptability, and significantly improves the long-term stable operation ability of the device in the complex environment of the mine.

[0033] Working principle: The present embodiment provides a mine air supply and heating device. When in use, first, the air supply system is operated to make the air enter the case 1, then the heating element is heated by the external control system, and then the air is filtered and treated by the air filtering system 11. Layered diffusion type uniform air supply: through the external control system, the gas filled in the air pressure shell 32 is adjusted, the sealing sheet 31 moves to one side, causing the adjustment frame 22 and the inner frame 23 to translate outward, at this time, the mounting sheet 26 applies force to the end of the transmission rod 27, causing the transmission rod 27 to drive the guide vane 24 to rotate axially outward, when the air flows, it passes through the guide vane 24, causing the air to flow in all directions, thereby realizing layered diffusion type uniform air supply, which is used in personnel-intensive and overall environment adjustment areas such as underground main roads. The air flow is gathered and blown in a direction by the guide blades 24. In this process, the pneumatic slider 42 slides on the arc-shaped slide rail 43 to adjust the direction of the air pipe 41, the fixed frame 47 is displaced, the support rod 44 connected by a ball head is inclined, the first spring 45 exerts a spring force on the adjusting rod 46, the adjusting rod 46 is kept balanced and stable according to the ball head connection with the fixed frame 47 during the inclination, meanwhile, the miniature servo motor 54 drives the movable rod 53 to rotate axially through the external circuit mechanism, the arc-shaped interlayer plate 52 is rotated axially due to the sliding fitting of the movable rod 53 and the hinged frame 55 by the bolt, and the arc-shaped interlayer plate 52 is opened, wherein, when the arc-shaped interlayer plate 52 is opened, the wind-blocking fiber cloth 59 bears the pulling force, the winding rod 56 rotates, the gap between the adjacent two arc-shaped interlayer plates 52 is sealed, the contact area with the flowing air is increased, and the air pipe 41 is formed into a horn shape, the air flow flows into from the horn-shaped port and flows out from the port with a small diameter, wherein, according to the Venturi tube principle, the air flow speed is increased, and the direction of the gathered and blown air flow is adjusted.

[0034] The embodiments of the present application are disclosed, but the present application is not limited to the embodiments, and those skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, which are within the protection scope of the present application.

Claims

1. A mine ventilation heating device, comprising a housing (1) with a ventilation system, an air filtration system (11) with heating elements arranged inside the housing (1), a ventilation regulating mechanism (2) and a drive assembly (3) arranged at the end of the housing (1), and a guide assembly (4) and a gain assembly (5) arranged inside the housing (1), characterized in that, The air supply adjustment mechanism (2) includes an outer frame (21) fixedly sleeved on one end of the casing (1). Several adjustment frames (22) are slidably adapted inside the outer frame (21), and two adjacent adjustment frames (22) are slidably adapted. An inner frame (23) is slidably adapted inside one of the adjustment frames (22). Several guide vanes (24) are rotatably connected in a square array inside the outer frame (21), adjustment frame (22) and inner frame (23). The adjustment frame (22) and the inner frame (23) are moved inward or outward by the drive component (3); when moving outward, the guide vane (24) rotates outward, and the airflow spreads in all directions, which can deliver air in a layered and uniform manner, suitable for densely populated areas such as underground tunnels and areas that require overall environmental regulation; when moving inward, the guide vane (24) rotates inward, and the airflow gathers in the middle, which can deliver air in a concentrated and directional manner, suitable for local areas such as tunnel faces that require key heating or ventilation, and can guide the direction of concentrated air delivery through the guide component (4).

2. The mine ventilation heating device according to claim 1, characterized in that, The air supply adjustment mechanism (2) also includes several limiting plates (25). The limiting plates (25) are diagonally distributed and fixedly connected to the surfaces of the outer frame (21), the adjustment frame (22) and the inner frame (23). The surfaces of the adjustment frame (22) and the inner frame (23) are linearly arrayed and fixedly connected to several mounting plates (26). Each mounting plate (26) has a transmission rod (27) hinged at its end, and the transmission rod (27) is hinged to the guide vane (24).

3. A mine ventilation heating device according to claim 2, characterized in that, The drive assembly (3) includes several sealing plates (31), which are diagonally distributed and fixedly connected to the surfaces of the adjustment frame (22) and the inner frame (23). Several air pressure shells (32) are diagonally distributed and fixedly connected inside the outer frame (21) and the adjustment frame (22), and the sealing plates (31) are sealed and slidably adapted inside the air pressure shells (32).

4. A mine ventilation heating device according to claim 3, characterized in that, The guide assembly (4) includes a duct (41), which is movably fitted inside the inner frame (23). The surface of the duct (41) is fixedly connected with a pneumatic slider (42) in a symmetrical structure.

5. A mine ventilation heating device according to claim 4, characterized in that, The inner frame (23) has a symmetrical structure on one side with an arc-shaped slide rail (43) fixedly connected, and the arc-shaped slide rail (43) is slidably adapted to the pneumatic slider (42). The bottom inner wall of the chassis (1) has a symmetrical structure with a ball head connected to a support rod (44).

6. A mine ventilation heating device according to claim 5, characterized in that, Each of the support rods (44) is movably sleeved with a first spring (45), and each of the support rods (44) is sleeved with an adjusting rod (46), and the adjusting rod (46) is in movable contact with the first spring (45). A fixing frame (47) is fixedly sleeved on the end surface of the air duct (41), and the fixing frame (47) is connected to the ball head of the adjusting rod (46).

7. A mine ventilation heating device according to claim 6, characterized in that, The gain component (5) includes several arc-shaped blocks (51), which are fixedly connected to the end of the air duct (41) in a ring array. Each arc-shaped block (51) has an arc-shaped sandwich plate (52) hinged at one end, and the end of the air duct (41) has several movable rods (53) hinged in a ring array.

8. A mine ventilation heating device according to claim 7, characterized in that, The end of the air duct (41) is arranged in a ring array with micro servo motors (54), and the output end of the micro servo motors (54) is connected to the movable rod (53) for transmission. Each arc-shaped sandwich plate (52) is fixedly connected to a hinge frame (55), and the rod on the hinge frame (55) is slidably connected inside the movable rod (53).

9. A mine ventilation heating device according to claim 8, characterized in that, Each of the arc-shaped sandwich panels (52) has a winding rod (56) rotatably connected to the inner walls on both sides, and one end of the winding rod (56) passes through the arc-shaped sandwich panel (52). Each of the arc-shaped sandwich panels (52) has a circular disc (57) fixedly connected to one end, and the circular disc (57) is sleeved on the end surface of the winding rod (56).

10. A mine ventilation heating device according to claim 9, characterized in that, Each of the circular discs (57) is provided with a disc spring (58), and the disc spring (58) is adapted to the elastic torque transmission of the winding rod (56). The surface of each winding rod (56) is wrapped with windproof fiber cloth in layers, and the windproof fiber cloth passes through the arc-shaped sandwich plate (52). The end of the windproof fiber cloth is fixedly connected to the adjacent arc-shaped sandwich plate (52).

Images