Coal mine visual safety management system and method

Abstract

The invention relates to the technical field of remote monitoring and shooting equipment, and discloses a coal mine visual safety management system which comprises a base, a groove is formed in the base, a rotating shaft is rotationally connected in the groove, a torsional spring is arranged between the rotating shaft and the groove, the rotating shaft is sleeved with a placement table, the placement table is obliquely arranged, and the placement table can rotate in the groove; side plates are arranged on the two sides of the top of the containing table, a supporting plate is arranged between the two side plates, and the two side plates and the supporting plate are in a U shape. The top plate abuts against the tops of the side plates and the top of the supporting plate, and the width of the top plate is larger than the distance between the two side plates; the bottom of the top plate is connected with a protection plate, and the width of the protection plate is larger than the distance between the two side plates. A window is formed in the protection plate, and a transparent plate is fixedly connected to the window in a sealed mode; the adjusting mechanism vertically moves along with the top plate to drive the rotating shaft to rotate, and the positioning mechanism is used for positioning the top plate. According to the scheme, the problem that the installation mode of a camera of existing equipment is very inconvenient to operate is mainly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of remote monitoring equipment, and in particular to a coal mine visual safety management system and method. Background Art

[0002] At coal mine construction sites, in order to ensure the safety of workers, the site needs to be monitored at all times so that timely support and rescue can be provided in the event of an emergency. Currently, cameras are mainly used for monitoring on the market. Traditional cameras are usually fixed to a high place on the construction site with bolts during installation, but some tools are required for auxiliary installation during installation, which is inconvenient for workers to carry tools. At the same time, there are often gravel, sand and dust flying around the construction site, which will damage the camera and affect its service life.

[0003] To solve the above problems, a Chinese patent with publication number CN213817945U discloses a remote monitoring device for coal mines with a protective structure, including a camera body, the bottom end of the camera body is fixedly connected to a connecting frame, and the right side of the connecting frame is fixedly connected to a fixing plate, the top of the camera body is sleeved with a protective plate, the center position of the protective plate is provided with a strip-shaped through groove, the top of the camera body is fixedly installed with a limiting mechanism, and the limiting mechanism includes an inner rod; the remote monitoring device can be directly installed without carrying other tools, and is easy to operate; and the installation of the protective plate can protect the camera body to avoid damage to the camera body.

[0004] The following problems exist during the actual use of the above-mentioned remote monitoring equipment: when the staff installs the camera body at the specified location, the staff needs to hold the camera body at a specified height, and the staff also needs to complete the installation of the camera body through adjustment. The operation is very inconvenient. If you are not careful, the camera body will fall, causing damage to the camera body. Summary of the Invention

[0005] The present invention aims to provide a visual safety management system and method for coal mines, so as to solve the problem that the installation method of cameras in existing equipment is very inconvenient to operate.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a visual safety management system for coal mines, comprising a base, a groove being provided on the base, a rotating shaft being rotatably connected in the groove, a torsion spring being provided between the rotating shaft and the groove, a placing platform being sleeved on the rotating shaft, the placing platform being tilted, and the placing platform being able to rotate in the groove; side panels are provided on both sides of the top of the placing platform, a support plate is provided between the two side panels, and the two side panels and the support plate are U-shaped; a top panel is also included for abutting against the top of the side panels and the top of the support panels, and the width of the top panel is greater than the spacing between the two side panels; a protective plate is connected to the bottom of the top panel, and the width of the protective plate is greater than the spacing between the two side panels; a window is provided on the protective panel, and a transparent plate is sealed and fixed to the window; an adjustment mechanism is also included for driving the rotating shaft to rotate as the top panel moves vertically, and a positioning mechanism for positioning the top panel.

[0007] The principles and advantages of this solution are:

[0008] 1. This solution installs the base in the designated position using existing bolts, and then places the camera on the platform so that the camera is located between the two side panels and the camera is against the support plate. Since the platform is tilted, it can limit the camera and prevent it from sliding outward.

[0009] 2. This solution drives the top plate to move downward, so that the bottom of the top plate is against the top of the side plate and the top of the support plate, and the top plate is positioned by the positioning mechanism; during the downward movement of the top plate, the rotating shaft is driven to rotate by the adjustment mechanism, and the rotating shaft drives the placement table and the camera to rotate to a horizontal state, so that the camera is respectively against the support plate and the protective plate, thereby achieving the clamping positioning of the camera, and the camera's camera point is opposite to the transparent plate, so as to monitor the coal mine construction site and play a role in safety management. When an emergency occurs, timely support and rescue can be provided; compared with the existing technology, this solution supports the camera through the placement table and ensures that the camera will not fall, so that the staff can easily position the camera and the operation is more convenient.

[0010] 3. In this solution, the width of the top plate is greater than the distance between the two side plates, and the width of the protective plate is greater than the distance between the two side plates, so as to better protect the camera.

[0011] Furthermore, baffles are provided on both sides of the top plate, and the distance between the two baffles is greater than the distance between the two side plates.

[0012] Through the above setting, the two baffles can protect the side panels, thereby better protecting the camera.

[0013] Furthermore, the adjustment mechanism includes a chamber opened inside the base and adjustment parts located on both sides of the placement table. The rotating shaft extends into the chamber, and the rotating shaft is rotatably connected to the chamber. Top grooves are provided on both sides of the top of the chamber; the adjustment part includes a gear coaxially connected to the rotating shaft and a rack fixed to the baffle. The top groove is communicated with the chamber, and the rack can move vertically in the top groove, and the rack can engage with the gear.

[0014] Through the above arrangement, when the top plate moves downward, the top plate drives the rack to move downward through the baffle, and the rack passes through the top groove and engages with the gear to drive the rotating shaft to rotate. When the bottom of the top plate is against the top of the side plate and the top of the support plate, the rotating shaft drives the placement table and the camera to rotate to a horizontal state.

[0015] Furthermore, the groove is communicated with the chamber; the positioning mechanism includes a worm wheel coaxially connected to the rotating shaft, a worm connected to the base for rotation, and a guide plate fixed to the side wall of the base, the worm wheel is engaged with the worm, and the worm is provided with a positioning hole; a positioning block is vertically slidably connected to the guide plate, a first spring is provided between the positioning block and the guide plate, the positioning block is abutted against the worm, the positioning block is located on the motion trajectory of the positioning hole, and the positioning block and the positioning hole are slidably matched.

[0016] Through the above arrangement, during the rotation of the shaft, the shaft drives the worm wheel to rotate, and the worm wheel engages with the worm to drive the worm to rotate. When the bottom of the top plate is against the top of the side plate and the top of the support plate, and the placement table is rotated to a horizontal state, the positioning hole and the positioning block are vertically opposite to each other, and the positioning block slides into the positioning hole under the action of the first spring, thereby stopping the worm. The worm positions the top plate through the worm wheel, shaft, gear, rack, and baffle.

[0017] Furthermore, a disc is provided on the positioning block.

[0018] Through the above arrangement, the positioning block is driven to move vertically by the disc, which makes the operation more convenient.

[0019] Furthermore, a movable shaft is rotatably connected to the top plate, and the protective plate is fixed to the movable shaft; a strip groove is provided on the top of the base, and a push block for squeezing the protective plate is slidably connected in the strip groove; and a linkage mechanism is also included that drives the push block to move along the strip groove as the worm rotates.

[0020] Through the above arrangement, during the rotation of the worm, the push block is driven by the linkage mechanism to move along the path of the strip groove, so that the push block pushes the protective plate to rotate toward the direction of the camera; when the top plate is positioned, the protective plate is against the camera, and at the same time, the end of the camera away from the protective plate is against the support plate, and the push block is used to achieve the compression positioning of the protective plate, that is, the protective plate is used to block the camera to prevent the camera from being damaged by foreign objects.

[0021] Furthermore, the strip groove is communicated with the chamber; the linkage mechanism includes a cylindrical cam coaxially connected to the worm and a linkage block fixed to the push block. The cylindrical cam is provided with a curved groove, and the end of the linkage block away from the push block is slidably connected to the curved groove.

[0022] Through the above arrangement, during the downward movement of the top plate, the top plate drives the protective plate to move downward through the movable shaft, so that the protective plate is close to the base; and, during the downward movement of the top plate, the worm also rotates, and the worm drives the cylindrical cam to rotate, and the cylindrical cam drives the linkage block through the curved groove to push the push block to move along the path of the strip groove, so that the push block pushes the protective plate to rotate toward the direction of the camera.

[0023] Furthermore, a bottom groove is provided at one end of the protective plate away from the movable shaft, a first arc block is slidably connected in the bottom groove, a second spring is provided between the first arc block and the bottom groove; a second arc block is provided on the base for the first arc block to pass over.

[0024] Through the above-mentioned arrangement, when the protective plate rotates toward the camera, the protective plate drives the first arc block to move synchronously, so that the first arc block and the second arc block are against each other; the protective plate continues to rotate, so that the first arc block is blocked by the second arc block and moves toward the inside of the bottom groove, and the second spring is compressed; the protective plate continues to rotate, and when the protective plate is against the camera, the first arc block passes over the second arc block, and the side wall of the first arc block is against the second arc block, so that the second arc block is used to limit the first arc block, thereby avoiding the second arc block and the protective plate from rotating in the opposite direction, that is, strengthening the positioning effect of the protective plate and the top plate, and improving the stability of the camera protection.

[0025] The present invention also aims to provide a method for using a visual safety management system for coal mines, so as to solve the problem that the installation method of the camera in the existing equipment is very inconvenient to operate.

[0026] To achieve the above object, the present invention adopts the following technical solution: a method for using a coal mine visual safety management system, comprising the following steps:

[0027] Step 1: Install the base in the designated position using the existing bolts. Then place the camera on the platform so that the camera is located between the two side panels and tilted against the support plate.

[0028] Step 2: Move the top plate and the protective plate vertically toward the base. When the bottom of the top plate contacts the top of the side plate and the top of the support plate, the top plate blocks the gap between the tops of the two side plates, and the protective plate blocks the gap between the side walls of the two side plates. The top plate is positioned by the positioning mechanism. During the vertical movement of the top plate toward the base, the adjusting mechanism drives the rotating shaft to rotate, and the rotating shaft drives the placement table and the camera to rotate to a horizontal state, so that the camera contacts the support plate and the protective plate respectively. At this time, the camera's camera position is opposite to the transparent plate.

[0029] Step 3: Start the camera and monitor the coal mine construction site through the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of an embodiment of a visual safety management system for coal mines according to the present invention;

[0031] Figure 2 for Figure 1 Partial cross-sectional view in the main viewing direction;

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 for Figure 1 Partial section view from the right side. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The figure marks in the drawings of the specification include: base 10, groove 11, rotating shaft 12, torsion spring 13, placing table 14, side plate 15, support plate 16, top plate 20, protective plate 21, baffle 22, transparent plate 23, chamber 30, gear 31, rack 32, worm gear 40, worm 41, guide plate 42, positioning block 43, first spring 44, movable shaft 50, strip groove 51, push block 52, cylindrical cam 53, linkage block 54, bottom groove 60, first arc block 61, second spring 62, second arc block 63, disk 70, camera 80.

[0036] Example

[0037] Basically as attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 As shown: A visual safety management system for coal mines, comprising a base 10, a groove 11 is opened downwardly in the center of the top of the base 10, a rotating shaft 12 is rotatably connected in the groove 11, a torsion spring 13 is fixed between the rotating shaft 12 and the groove 11, a placement platform 14 is sleeved on the rotating shaft 12, and the placement platform 14 can rotate in the groove 11; side panels 15 are fixed on both sides of the top of the placement platform 14, a support plate 16 is fixed between the two side panels 15, the support plate 16 is close to the rear side of the placement platform 14, and the two side panels 15 and the support plate 16 are U-shaped; the placement platform 14 is tilted, and in the initial state, the height of the side of the placement platform 14 close to the support plate 16 is less than the height of the side of the placement platform 14 away from the support plate 16. Placing the camera 80 on the tilted placement platform 14 can prevent the camera 80 from slipping.

[0038] The top plate 20 is further provided to abut the tops of the side plates 15 and the tops of the support plates 16. The width of the top plate 20 is greater than the distance between the two side plates 15. A protective plate 21 is connected to the bottom of the top plate 20. The width of the protective plate 21 is greater than the distance between the two side plates 15. Baffles 22 are fixed to both sides of the top plate 20. The distance between the two baffles 22 is greater than the distance between the two side plates 15. A window is formed in the protective plate 21, and a transparent plate 23 is sealed and fixed to the window.

[0039] The cam 12 is provided with a plurality of adjustment means for adjusting the rotation axis 12, and the adjustment means includes a chamber 30 provided inside the base 10 and adjustment means located on both sides of the placement table 14. The rotation axis 12 extends into the chamber 30, and the rotation axis 12 is rotatably connected to the chamber 30. Top grooves are provided on both sides of the top of the chamber 30. The adjustment means includes a gear 31 coaxially connected to the rotation axis 12 and a rack 32 fixed to the baffle 22. The top groove is communicated with the chamber 30. The rack 32 can move vertically in the top groove, and the rack 32 can mesh with the gear 31. Figure 4 As shown, the gear 31 is located behind the rack 32 .

[0040] It also includes a positioning mechanism for positioning the top plate 20, and the groove 11 is connected to the chamber 30; the positioning mechanism includes a worm gear 40 coaxially connected to the rotating shaft 12, a worm 41 rotatably connected to the base 10, and a guide plate 42 fixed to the side wall of the base 10, the worm gear 40 is engaged with the worm 41, and a positioning hole is opened on the worm 41, and the positioning hole is located outside the base 10; a positioning block 43 is vertically slidably connected to the guide plate 42, and a first spring 44 is fixed between the positioning block 43 and the guide plate 42, and the positioning block 43 is against the worm 41; after the worm 41 drives the positioning hole to rotate, the positioning block 43 is located on the motion trajectory of the positioning hole, and the positioning block 43 slides in cooperation with the positioning hole.

[0041] A movable shaft 50 is rotatably connected to the top plate 20, and the protective plate 21 is fixedly connected to the movable shaft 50; a strip groove 51 is opened on the top of the base 10, and a push block 52 for squeezing the protective plate 21 is slidably connected in the strip groove 51; it also includes a linkage mechanism that drives the push block 52 to move along the strip groove 51 as the worm 41 rotates, and the strip groove 51 is communicated with the chamber 30; the linkage mechanism includes a cylindrical cam 53 coaxially connected to the worm 41, and a linkage block 54 fixedly connected to the push block 52, a curved groove is opened on the cylindrical cam 53, and the end of the linkage block 54 away from the push block 52 is slidably connected to the curved groove.

[0042] A bottom groove 60 is formed at one end of the protective plate 21 away from the movable shaft 50, and a first arc block 61 is slidably connected in the bottom groove 60, and a second spring 62 is fixed between the first arc block 61 and the bottom groove 60; a second arc block 63 is fixed to the base 10 for the first arc block 61 to pass over; after the first arc block 61 passes over the second arc block 63, the side wall of the first arc block 61 is abutted against the second arc block 63.

[0043] The specific implementation process is as follows:

[0044] When in use, the base 10 is installed in the designated position through the existing bolts, and then the camera 80 is placed on the placement table 14, so that the camera 80 is located between the two side panels 15, and the camera 80 is against the support plate 16. Since the placement table 14 is set at an angle, it can limit the camera 80 and prevent the camera 80 from sliding outward.

[0045] The top plate 20 is driven to move downward, so that the bottom of the top plate 20 is against the top of the side plate 15 and the top of the support plate 16; during the downward movement of the top plate 20, the top plate 20 drives the rack 32 to move downward through the baffle 22, and the rack 32 passes through the top groove and engages with the gear 31 to drive the rotating shaft 12 to rotate. When the bottom of the top plate 20 is against the top of the side plate 15 and the top of the support plate 16, the rotating shaft 12 drives the placement table 14 and the camera 80 to rotate to a horizontal state, and the torsion spring 13 is deformed; during the rotation of the rotating shaft 12, the rotating shaft 12 drives the worm gear 40 to rotate, and the worm gear 40 is rotated. 0 is engaged with the worm 41 to drive the worm 41 to rotate. When the bottom of the top plate 20 is against the top of the side plate 15 and the top of the support plate 16, and the placement table 14 is rotated to a horizontal state, the positioning hole and the positioning block 43 are vertically opposite to each other, and the positioning block 43 slides into the positioning hole under the action of the first spring 44, thereby stopping the worm 41. The worm 41 positions the top plate 20 through the worm wheel 40, the rotating shaft 12, the gear 31, the rack 32, and the baffle 22, and then the top plate 20 is used to block the camera 80 to prevent the camera 80 from being damaged by foreign objects.

[0046] During the downward movement of the top plate 20, the top plate 20 drives the baffle 22 to move downward. When the top plate 20 is positioned, the bottom of the baffle 22 is against the top of the base 10. Since the distance between the two baffles 22 is greater than the distance between the two side plates 15, the two baffles 22 can protect the side plates 15, thereby better protecting the camera 80.

[0047] During the downward movement of the top plate 20, the top plate 20 drives the protective plate 21 to move downward through the movable shaft 50, so that the protective plate 21 is close to the base 10; and, during the downward movement of the top plate 20, the worm 41 also rotates, and the worm 41 drives the cylindrical cam 53 to rotate, and the cylindrical cam 53 drives the linkage block 54 through the curved groove to push the push block 52 to move along the path of the strip groove 51, so that the push block 52 pushes the protective plate 21 to rotate toward the direction of the camera 80; when the top plate 20 is positioned, the protective plate 21 is against the camera 80, and at the same time, the end of the camera 80 away from the protective plate 21 is against the support plate 16, and the push block 52 is used to achieve the compression positioning of the protective plate 21, that is, the protective plate 21 is used to block the camera 80 to prevent the camera 80 from being damaged by foreign objects.

[0048] When the protective plate 21 abuts against the camera 80, the rear side of the camera 80 abuts against the support plate 16, and the front side of the camera 80 abuts against the protective plate 21, so that the camera 80 can be clamped and positioned; and the camera position of the camera 80 is opposite to the transparent plate 23, so as to monitor the coal mine construction site and play a role in safety management. When an emergency occurs, timely support and rescue can be provided.

[0049] During the rotation of the protective plate 21 toward the camera 80, the protective plate 21 drives the first arc block 61 to move synchronously, so that the first arc block 61 and the second arc block 63 are abutted against each other; the protective plate 21 continues to rotate, so that the first arc block 61 is blocked by the second arc block 63 and moves toward the inside of the bottom groove 60, and the second spring 62 is compressed; the protective plate 21 continues to rotate, and when the protective plate 21 abuts against the camera 80, the first arc block 61 passes over the second arc block 63, and the side wall of the first arc block 61 abuts against the second arc block 63, so that the second arc block 63 is used to limit the first arc block 61, thereby preventing the second arc block 63 and the protective plate 21 from rotating in the opposite direction, that is, strengthening the positioning effect of the protective plate 21 and the top plate 20, and improving the stability of protecting the camera 80.

[0050] In this embodiment, a disc 70 is fixedly connected to the positioning block 43 ; the positioning block 43 is driven by the disc 70 to move vertically, which makes operation more convenient.

[0051] This embodiment also provides a method for using a coal mine visual safety management system, including the following steps:

[0052] Step 1: Install the base 10 at the designated position using existing bolts, and then place the camera 80 on the placement table 14 so that the camera 80 is located between the two side panels 15 and the camera 80 is tilted against the support plate 16 .

[0053] Step 2: Drive the top plate 20 downward so that the bottom of the top plate 20 abuts against the top of the side plate 15 and the top of the support plate 16; during the downward movement of the top plate 20, the top plate 20 drives the rack 32 downward through the baffle 22, and the rack 32 passes through the top groove and engages with the gear 31 to drive the shaft 12 to rotate. When the bottom of the top plate 20 abuts against the top of the side plate 15 and the top of the support plate 16, the shaft 12 drives the placement table 14 and the camera 80 to rotate to a horizontal state, and the torsion spring 13 is deformed; during the rotation period of the shaft 12 During this time, the rotating shaft 12 drives the worm gear 40 to rotate, and the worm gear 40 engages with the worm 41 to drive the worm 41 to rotate. When the bottom of the top plate 20 is against the top of the side plate 15 and the top of the support plate 16, and the placement table 14 is rotated to a horizontal state, the positioning hole and the positioning block 43 are vertically opposite to each other, and the positioning block 43 slides into the positioning hole under the action of the first spring 44, thereby stopping the worm 41. The worm 41 positions the top plate 20 through the worm gear 40, the rotating shaft 12, the gear 31, the rack 32, and the baffle 22.

[0054] When the top plate 20 moves downward, the top plate 20 drives the baffle 22 to move downward. When the top plate 20 is positioned, the bottom of the baffle 22 abuts against the top of the base 10 .

[0055] During the downward movement of the top plate 20, the top plate 20 drives the protective plate 21 to move downward through the movable shaft 50, so that the protective plate 21 is close to the base 10; and, during the downward movement of the top plate 20, the worm 41 also rotates, and the worm 41 drives the cylindrical cam 53 to rotate, and the cylindrical cam 53 drives the linkage block 54 through the curved groove to push the push block 52 to move along the path of the strip groove 51, so that the push block 52 pushes the protective plate 21 to rotate toward the direction of the camera 80; when the top plate 20 is positioned, the protective plate 21 is against the camera 80, and at the same time, the end of the camera 80 away from the protective plate 21 is against the support plate 16, and the push block 52 is used to achieve the compression positioning of the protective plate 21.

[0056] When the protective plate 21 abuts against the camera 80, the rear side of the camera 80 abuts against the support plate 16, and the front side of the camera 80 abuts against the protective plate 21, so that the camera 80 can be clamped and positioned; and at this time, the camera position of the camera 80 is opposite to the transparent plate 23.

[0057] During the rotation of the protective plate 21 toward the camera 80, the protective plate 21 drives the first arc block 61 to move synchronously, so that the first arc block 61 and the second arc block 63 are abutted against each other; the protective plate 21 continues to rotate, so that the first arc block 61 is blocked by the second arc block 63 and moves toward the inside of the bottom groove 60, and the second spring 62 is compressed; the protective plate 21 continues to rotate, and when the protective plate 21 abuts against the camera 80, the first arc block 61 passes over the second arc block 63, and the side wall of the first arc block 61 abuts against the second arc block 63, so that the second arc block 63 is used to limit the first arc block 61.

[0058] Step 3: Start the camera 80 and monitor the coal mine construction site through the camera 80.

[0059] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A visual safety management system for coal mines, comprising a base, characterized in that: The base is provided with a groove, in which a rotating shaft is rotatably connected, a torsion spring is provided between the rotating shaft and the groove, a placing table is sleeved on the rotating shaft, the placing table is tilted, and the placing table can rotate in the groove; side panels are provided on both sides of the top of the placing table, a support plate is provided between the two side panels, and the two side panels and the support plate are U-shaped; it also includes a top plate for abutting against the top of the side panels and the top of the support panels, and the width of the top plate is greater than the distance between the two side panels; the bottom of the top panel is connected to a protective plate, and the width of the protective plate is greater than the distance between the two side panels; a window is provided on the protective plate, and a transparent plate is sealed and fixed to the window; it also includes an adjustment mechanism that drives the rotating shaft to rotate as the top panel moves vertically, and a positioning mechanism for positioning the top panel.

2. The visual safety management system for coal mines according to claim 1, characterized in that: Baffles are provided on both sides of the top plate, and the distance between the two baffles is greater than the distance between the two side plates.

3. The visual safety management system for coal mines according to claim 2, characterized in that: The adjustment mechanism includes a chamber opened inside the base and adjustment parts located on both sides of the placement table. The rotating shaft extends into the chamber and is rotatably connected to the chamber. Top grooves are provided on both sides of the top of the chamber; the adjustment part includes a gear coaxially connected to the rotating shaft and a rack fixed to the baffle. The top groove is communicated with the chamber, the rack can move vertically in the top groove, and the rack can engage with the gear.

4. The visual safety management system for coal mines according to claim 3, characterized in that: The groove is communicated with the chamber; the positioning mechanism includes a worm wheel coaxially connected to the rotating shaft, a worm connected to the base for rotation, and a guide plate fixed to the side wall of the base, the worm wheel is engaged with the worm, and the worm is provided with a positioning hole; a positioning block is vertically slidably connected to the guide plate, a first spring is provided between the positioning block and the guide plate, the positioning block is abutted against the worm, the positioning block is located on the motion trajectory of the positioning hole, and the positioning block and the positioning hole are slidably matched.

5. The visual safety management system for coal mines according to claim 4, characterized in that: A disc is provided on the positioning block.

6. The visual safety management system for coal mines according to claim 5, characterized in that: A movable shaft is rotatably connected to the top plate, and the protective plate is fixed to the movable shaft; a strip groove is provided on the top of the base, and a push block for squeezing the protective plate is slidably connected in the strip groove; and a linkage mechanism is also included that drives the push block to move along the strip groove as the worm rotates.

7. The visual safety management system for coal mines according to claim 6, characterized in that: The strip groove is communicated with the chamber; the linkage mechanism includes a cylindrical cam coaxially connected to the worm and a linkage block fixed to the push block. The cylindrical cam is provided with a curved groove, and the end of the linkage block away from the push block is slidably connected to the curved groove.

8. The visual safety management system for coal mines according to claim 7, characterized in that: A bottom groove is provided at one end of the protective plate away from the movable shaft, a first arc block is slidably connected in the bottom groove, a second spring is provided between the first arc block and the bottom groove; a second arc block is provided on the base for the first arc block to pass over.

9. The method for using the coal mine visual safety management system according to claim 1, characterized in that: The following steps are involved: Step 1: Install the base in the designated position using the existing bolts. Then place the camera on the platform so that the camera is located between the two side panels and tilted against the support plate. Step 2: Move the top plate and the protective plate vertically toward the base. When the bottom of the top plate contacts the top of the side plate and the top of the support plate, the top plate blocks the gap between the tops of the two side plates, and the protective plate blocks the gap between the side walls of the two side plates. The top plate is positioned by the positioning mechanism. During the vertical movement of the top plate toward the base, the adjusting mechanism drives the rotating shaft to rotate, and the rotating shaft drives the placement table and the camera to rotate to a horizontal state, so that the camera contacts the support plate and the protective plate respectively. At this time, the camera's camera position is opposite to the transparent plate. Step 3: Start the camera and monitor the coal mine construction site through the camera.

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