Coal mine belt fire advanced sensing video camera

Abstract

The utility model relates to a coal mine belt fire advanced sensing video camera which comprises a belt support, an ascending belt and a descending belt roll on the H-shaped belt support, two vertical frames of the belt support are connected through a cross beam, and a sensing camera is fixed on the cross beam. A sensing camera body of the sensing camera is installed on the cross beam through an installation support, a first illuminating lamp is fixedly installed in the middle of the upper surface of the sensing camera body, and a first thermal imaging camera and a first video camera are fixedly installed on the portions, on the two sides of the first illuminating lamp, of the upper surface of the sensing camera body respectively. The sensing camera is additionally arranged between the ascending belt and the descending belt to directly observe the state and the surface temperature of the belts, the temperature and the surface state of the belts are sensed in time, an alarm is automatically given when the temperature exceeds an early warning value, and the temperature change of the belts can be found in the early stage; the dispatching room decides whether to dispatch personnel to cool by sprinkling water or shut down for maintenance, so that belt fire caused by high temperature can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to a camera, specifically a video camera for early detection of coal mine conveyor belt fires. Background Technology

[0002] Coal mine conveyor belts operate over long distances. During operation, friction between the belt and rollers / supports can cause temperature increases, especially when belt tension is too high or foreign objects are stuck, exacerbating the friction and increasing the risk of fire. Furthermore, prolonged low-speed friction or severe wear on the surface and edges can also cause the belt surface to heat up, potentially igniting coal dust, coal chunks, or gas, leading to safety accidents. Currently, monitoring of conveyor belts typically involves deploying cameras or manual inspections. However, due to the long distances of conveyor belts, deploying numerous cameras would be necessary, resulting in significant engineering and cost expenditures. Manual inspections require dedicated manpower and also impact production costs.

[0003] Currently, a utility model patent with publication number CN218830294U discloses a moving target sensing device for underground coal mine roadways. The device includes a guide rail, a movable frame movably connected to the surface of the guide rail, a slider fixedly connected to the opposite side of the movable frame, and grooves on both the front and rear sides of the guide rail. The slider extends into the inner cavity of the groove and is movably connected to the groove on the side away from the movable frame. A first rotating shaft is movably connected to the inner cavity of the movable frame. This utility model, through the coordinated use of the movable frame, slider, groove, first rotating shaft, roller, first bevel gear, mounting shaft, first motor, turntable, belt, and second bevel gear, has the advantage of easy mobility. It solves the problem that existing sensing devices for underground coal mine roadways are usually fixedly installed on the mine wall and cannot be moved. In underground coal mines, monitoring moving targets generally requires the installation of numerous surveillance cameras, significantly increasing costs.

[0004] As can be seen from the above-disclosed technical content, although the utility model with announcement number CN218830294U, as existing technology, can monitor a large number of sections through a single camera, its coverage area is inevitably limited due to the limitations of power storage and line length. In order to increase the coverage area, more tracks and more signal processing equipment must be added, and the overall cost is still high. At the same time, a simple video camera cannot detect temperature changes in time, and its early warning effect for detecting belt spontaneous combustion is not good. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a video camera for early detection of coal mine conveyor belt fires. It can observe the operating status of the conveyor belt at any time at a low cost, and promptly detect belt temperature and surface condition. It can detect belt temperature changes at an early stage and effectively prevent belt fires caused by high temperatures.

[0006] To achieve the above objectives, this utility model provides a coal mine conveyor belt fire advanced sensing video camera, comprising a conveyor belt support, uprights, a crossbeam, an upward conveyor belt, a downward conveyor belt, a sensing camera, a sensing camera body, a thermal imaging camera, a lighting lamp, a video camera, a thermal imaging camera, a second lighting lamp, a second video camera, a wiring connector, a mounting bracket, a knob, a pressure plate, and a C-shaped base. The upward and downward conveyor belts roll on the H-shaped conveyor belt support. The two uprights of the conveyor belt support are connected by a crossbeam, on which the sensing camera is fixed. The sensing camera body is mounted on the crossbeam via the mounting bracket. A lighting lamp is fixedly installed in the middle of the upper surface of the sensing camera body. A thermal imaging camera and a video camera are fixedly installed on the upper surfaces of the sensing camera bodies on both sides of the lighting lamp. A lighting lamp is fixedly installed in the middle of the lower surface of the sensing camera body. A thermal imaging camera and a video camera are fixedly installed on the lower surfaces of the sensing camera bodies on both sides of the lighting lamp. A wiring connector is provided on the side of the sensing camera body.

[0007] In addition, the coal mine conveyor fire advanced sensing video camera proposed in the above embodiments of this utility model may also have the following additional technical features:

[0008] As a further improvement of this utility model, the mounting bracket includes a knob, a pressure plate, and a C-shaped base. A screw hole is provided on the upper part of the C-shaped base. The screw connected to the knob passes through the screw hole of the C-shaped base and is movably connected to the pressure plate. The pressure plate and the lower part of the C-shaped base clamp the crossbeam.

[0009] As a further improvement of this utility model, the first lighting lamp, the first video camera, the second lighting lamp, and the second video camera are equipped with tempered glass covers, which are mounted on the sensing camera body made of stainless steel.

[0010] As a further improvement of this utility model, the thermal imaging camera one and thermal imaging camera two are equipped with a motor-driven, openable protective plate.

[0011] As a further improvement of this utility model, the first and second lighting lamps have built-in LED light columns.

[0012] By means of the above solution, this utility model has at least the following advantages: Compared with conventional personnel inspection, by adding a sensing camera between the up-line and down-line belts to directly observe the belt status and surface temperature, the belt temperature and surface status can be sensed in a timely manner, and an alarm can be automatically triggered when the temperature exceeds the warning value. This allows for early detection of belt temperature changes, and the dispatch room can decide whether to send personnel to spray water to cool down or to stop the machine for maintenance, which can effectively prevent belt fires caused by high temperatures. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation of a video camera for early detection of coal mine conveyor fires.

[0014] Figure 2 This is a 3D view of the sensing camera of the coal mine conveyor fire advanced sensing video camera installed on the conveyor belt bracket.

[0015] Figure 3 It is a top-view stereoscopic image from a video camera that provides advanced detection of coal mine conveyor fires.

[0016] Figure 4 It is a downward-view stereoscopic image from a video camera that provides advanced detection of coal mine conveyor fires.

[0017] In the diagram: 1. Belt support bracket, 1-1. Stand, 1-2. Crossbeam, 2. Upward belt, 3. Downward belt, 4. Sensing camera, 4-1. Sensing camera body, 4-11. Thermal imaging camera one, 4-12. Lighting lamp one, 4-13. Video camera one, 4-14. Thermal imaging camera two, 4-15. Lighting lamp two, 4-16. Video camera two, 4-17. Line connector, 4-2. Mounting bracket, 4-21. Knob, 4-22. Pressure plate, 4-23. C-shaped base. Detailed Implementation

[0018] The following description, in conjunction with the accompanying drawings, describes the coal mine conveyor fire advanced sensing video camera of this utility model.

[0019] In Embodiment 1 of this application, as Figures 1 to 4As shown, this coal mine conveyor fire advanced sensing video camera (hereinafter referred to as "the present invention") includes a conveyor belt support 1, a vertical frame 1-1, a crossbeam 1-2, an upward conveyor belt 2, a downward conveyor belt 3, a sensing camera 4, a sensing camera body 4-1, a thermal imaging camera 4-11, a lighting lamp 4-12, a video camera 4-13, a thermal imaging camera 4-14, a lighting lamp 4-15, a video camera 4-16, a line connector 4-17, a mounting bracket 4-2, a knob 4-21, a pressure plate 4-22, and a C-shaped base 4-23. The upward conveyor belt 2 and the downward conveyor belt 3 roll on the H-shaped conveyor belt support 1. The two vertical frames 1-1 of the conveyor belt support 1 are connected by the crossbeam 1-2. A sensing camera 4 is fixed on the crossbeam 1-2; the sensing camera body 4-1 of the sensing camera 4 is mounted on the crossbeam 1-2 via a mounting bracket 4-2. An illumination lamp 4-12 is fixedly installed in the middle of the upper surface of the sensing camera body 4-1. A thermal imaging camera 4-11 and a video camera 4-13 are fixedly installed on the upper surfaces of the sensing camera body 4-1 on both sides of the illumination lamp 4-12, respectively. An illumination lamp 4-15 is fixedly installed in the middle of the lower surface of the sensing camera body 4-1. A thermal imaging camera 4-14 and a video camera 4-16 are fixedly installed on the lower surfaces of the sensing camera body 4-1 on both sides of the illumination lamp 4-15, respectively. A wiring connector 4-17 is provided on the side of the sensing camera body 4-1.

[0020] A utility model patent (CN218830294U) discloses a moving target sensing device for underground coal mine roadways (hereinafter referred to as "the patent"). While this patent can monitor a large number of sections with a single camera, its coverage area is limited by power storage and line length. To increase coverage, more tracks and signal processing equipment are needed, resulting in high overall costs. Furthermore, simple video cameras cannot detect temperature changes in a timely manner, offering poor early warning for spontaneous combustion of conveyor belts. This invention, however, adds a sensing camera 4 between the upward conveyor belt 2 and the downward conveyor belt 3 to directly observe the belt's condition and surface temperature. It can detect these conditions promptly and automatically trigger an alarm when the temperature exceeds a warning threshold, allowing for early detection of temperature changes. The dispatch center can then decide whether to send personnel to cool the belt with water or shut down the machine for maintenance, effectively improving safety. Since transport roadways are not always straight due to geological conditions, the coverage area of ​​a single camera is limited. This device, by observing the surface temperature of the conveyor belt, effectively reduces equipment deployment density and provides early detection before fires occur, ensuring safe coal mine production.

[0021] This second embodiment is basically the same in structure as the first embodiment, the difference being that, as Figure 3 and Figure 4As shown, the mounting bracket 4-2 includes a knob 4-21, a pressure plate 4-22, and a C-shaped base 4-23. A screw hole is provided on the upper part of the C-shaped base 4-23. The screw connected to the knob 4-21 passes through the screw hole of the C-shaped base 4-23 and is movably connected to the pressure plate 4-22. The lower parts of the pressure plate 4-22 and the C-shaped base 4-23 clamp the crossbeam 1-2.

[0022] To further optimize the working efficiency of this application and provide protection for the equipment while ensuring its normal operation, the lighting lamp 4-12, video camera 4-13, lighting lamp 4-15, and video camera 4-16 are equipped with tempered glass covers, which are mounted on the stainless steel sensing camera body 4-1. To protect thermal imaging cameras 4-11 and 4-14 and reduce their lifespan, both cameras are equipped with motor-driven, openable protective plates. The operating time of each camera is measured in minutes, with a 30-second operation period every five minutes of downtime. During downtime, the motor built into the camera body 4-1 drives a toothed belt on the protective plate via gears, controlling the plate to move along a built-in track, thus shielding both cameras. During operation, the motor drives the toothed belt on the protective plate, controlling it to move in the opposite direction along the built-in track, exposing both cameras. To improve brightness, the lighting lamps 4-12 and 4-15 incorporate built-in LED light pillars.

[0023] When in use, install a video camera for advanced detection of coal mine conveyor fires. To prevent the conveyor belt from cooling down due to excessive transport distance, multiple devices can be installed on one conveyor line, with an interval of about 500 meters between devices. Connect the corresponding lines and the devices can be put into use.

[0024] When this utility model is used, its specific operation is as follows:

[0025] In use, thermal imaging camera 4-11 and video camera 4-13 observe the surface of the upward belt 2. Thermal imaging camera 4-11 observes the temperature of the surface of the upward belt 2, and video camera 4-13 observes whether there is any damage to the surface of the upward belt 2. Illumination lamp 4-12 provides illumination to facilitate the operation of video camera 4-13. At the same time, thermal imaging camera 4-14 and video camera 4-16 observe the surface of the downward belt 3. Thermal imaging camera 4-14 observes the temperature of the surface of the downward belt 3, and video camera 4-16 observes whether there is any damage to the surface of the downward belt 3. Illumination lamp 4-15 provides illumination to facilitate the operation of video camera 4-16.

[0026] During operation, friction between the conveyor belt and rollers / supports can cause the temperature to rise, or the surface may gradually become damaged and the temperature to rise. At this time, the equipment continuously observes the surface of the conveyor belt. When the temperature reaches a certain threshold, or when abnormal damage or even exposed wires appear on the belt surface, it can be predicted that the conveyor belt has overheated due to friction. At this time, it can be predicted in advance whether there is a fire hazard to the belt. After receiving the information, the dispatch room can arrange personnel to check or decide whether to stop the machine for inspection.

[0027] In summary, the coal mine conveyor fire early detection video camera of this utility model, by adding a sensing camera 4 between the upward conveyor belt 2 and the downward conveyor belt 3, directly observes the condition and surface temperature of the conveyor belt, and promptly senses the temperature and surface condition of the conveyor belt. When the temperature exceeds the warning value, it automatically alarms, which can detect changes in conveyor belt temperature at an early stage. The dispatch room can then decide whether to send personnel to spray water to cool down or to shut down the machine for maintenance, which can effectively prevent conveyor belt fires caused by high temperatures.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A coal mine belt fire early perception video camera, comprising a belt support (1), an upward belt (2) and a downward belt (3), the upward belt (2) and the downward belt (3) roll on the H-shaped belt support (1), the two vertical supports (1-1) of the belt support (1) are connected through the cross beam (1-2), characterized in that, The crossbeam (1-2) is fixed with a sensing camera (4); the sensing camera body (4-1) of the sensing camera (4) is installed on the crossbeam (1-2) through a mounting bracket (4-2), the upper surface of the sensing camera body (4-1) is fixedly installed with a first illuminating lamp (4-12) in the middle, the upper surface of the sensing camera body (4-1) on both sides of the first illuminating lamp (4-12) is fixedly installed with a first thermal imaging camera (4-11) and a first video camera (4-13) respectively, the lower surface of the sensing camera body (4-1) is fixedly installed with a second illuminating lamp (4-15) in the middle, the lower surface of the sensing camera body (4-1) on both sides of the second illuminating lamp (4-15) is fixedly installed with a second thermal imaging camera (4-14) and a second video camera (4-16) respectively, and the side edge of the sensing camera body (4-1) is provided with a line connecting seat (4-17).

2. The coal mine belt fire advance perception video camera according to claim 1, characterized in that, The mounting bracket (4-2) comprises a knob (4-21), a pressing plate (4-22) and a C-shaped base (4-23), a screw hole is formed in the upper part of the C-shaped base (4-23), a screw rod connected with the knob (4-21) is movably connected with the pressing plate (4-22) after penetrating through the screw hole of the C-shaped base (4-23), and the pressing plate (4-22) and the C-shaped base (4-23) clamp the crossbeam (1-2) from the lower part.

3. The coal mine belt fire advance perception video camera according to claim 2, characterized in that, The first illuminating lamp (4-12), the first video camera (4-13), the second illuminating lamp (4-15) and the second video camera (4-16) are provided with tempered glass covers which are installed on the sensing camera body (4-1) made of stainless steel.

4. The coal mine belt fire advance perception video camera according to claim 1, characterized in that, The first thermal imaging camera (4-11) and the second thermal imaging camera (4-14) are provided with openable and closable protective plates driven by motors.

5. The coal mine belt fire advance perception video camera according to claim 4, characterized in that, The first illuminating lamp (4-12) and the second illuminating lamp (4-15) are internally provided with LED lamp posts.

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