A coal mine subsidence area surface deformation monitoring device

Abstract

This invention provides a surface deformation monitoring device for coal mine subsidence areas, belonging to the technical field of monitoring devices. It includes a fixed base plate, a supporting structure mounted on the fixed base plate, an adjusting structure slidably fitted on the fixed base plate, a fixing structure mounted on the adjusting structure, a locking structure between the adjusting structure and the fixed base plate, a detection structure within the supporting structure, a monitoring structure mounted on the supporting structure, the detection structure corresponding to the adjusting structure, a pushing structure between the supporting structure and the detection structure, and a stabilizing structure within the detection structure, the stabilizing structure corresponding to the pushing structure. In this invention, the adjusting structure is slidably installed on the fixed base plate, and the fixing structure is installed on the adjusting structure. The fixing position of the fixing structure can be adjusted by the adjusting structure, thereby better fixing the device to the ground as needed, ensuring the stability of the device. Furthermore, the position of the adjusting structure can be locked by the locking structure.

Description

Technical Field

[0001] This invention relates to the field of monitoring device technology, specifically to a monitoring device for surface deformation in coal mine subsidence areas. Background Technology

[0002] Traditional methods for monitoring surface subsidence deformation in coal mining subsidence areas mostly employ leveling or GPS point measurement methods, using equipment such as total stations and levels for detection. A centering rod, an instrument used in conjunction with total stations and theodolites, is generally used for positioning and point alignment. However, during monitoring, these instruments require manual operation, making real-time monitoring impossible. Furthermore, the detection location may be affected by the subsidence area, causing the device to tilt and collapse, thus impacting the monitoring results.

[0003] Therefore, the present invention provides a surface deformation monitoring device for coal mine subsidence areas. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a surface deformation monitoring device for coal mine subsidence areas, solving the problems mentioned in the background section. This invention uses a locking structure to lock the position of the adjustment structure, ensuring the stability of the device after installation and fixing. It also clamps and fixes the detection structure, allowing the support structure and the detection structure to move synchronously, thus enabling more flexible adjustments to the monitoring method and expanding the device's applicability. Inserting the detection structure into the ground allows for real-time monitoring of ground deformation, reducing labor costs. Furthermore, it can monitor not only small-scale deformation but also larger-scale ground deformation. The invention also transforms lateral ground movement into vertical movement monitoring, reducing monitoring difficulty and improving monitoring effectiveness.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a surface deformation monitoring device for coal mine subsidence areas, comprising a fixed base plate, a supporting structure mounted on the fixed base plate, an adjusting structure slidably fitted on the fixed base plate, a fixed structure mounted on the adjusting structure, a locking structure between the adjusting structure and the fixed base plate, a detection structure installed within the supporting structure, a monitoring structure mounted on the supporting structure, the detection structure corresponding to the adjusting structure, a pushing structure between the supporting structure and the detection structure, and a stabilizing structure installed within the detection structure, the stabilizing structure corresponding to the pushing structure.

[0006] Furthermore, the support structure includes a support column fixed to the fixed base plate, and the adjustment structure includes a plurality of first sliding grooves opened on the fixed base plate. The plurality of first sliding grooves are located on the periphery of the support column, and a sliding block is slidably fitted in the first sliding groove. The sliding block corresponds to the locking structure.

[0007] Furthermore, the sliding block has a first through groove, and the fixing structure includes a ground nail installed in the sliding block. The first through groove corresponds to the ground nail, the ground nail is a diagonal rod structure, and a positioning plate is fixed at the end of the ground nail. The positioning plate corresponds to the sliding block and the positioning plate corresponds to the locking structure.

[0008] Furthermore, the locking structure includes a locking bolt with a tapered bottom. The locking bolt is threadedly engaged with the positioning plate and the sliding block. A second sliding groove is provided on both sides of the sliding block. A locking rod is slidably engaged in the second sliding groove. The locking rod corresponds to the locking bolt. A plurality of locking slots are provided in the first sliding groove, and the locking slots correspond to the locking rod.

[0009] Furthermore, a first push block is slidably fitted in the locking groove, the first push block is in contact with the locking rod, a first spring is fixed between the first push block and the groove wall of the locking groove, a clamping and fixing rod is fixed on the side of the sliding block, the support column is a hollow structure, the detection structure includes a monitoring rod installed in the support column, a second through groove is opened in the first sliding groove, the second through groove corresponds to the clamping and fixing rod, and the monitoring rod is located between multiple clamping and fixing rods.

[0010] Furthermore, the monitoring rod is a hollow structure with a threaded conical head at the bottom. The stabilizing structure includes a pull rod installed inside the monitoring rod. Multiple third through slots are provided on the periphery of the monitoring rod, and a fixing block is slidably fitted in the third through slot. A second spring is fixed between the fixing block and the monitoring rod. The end of the fixing block is a spherical structure. A pressing head is fixed at the bottom of the pull rod. The pressing head is a conical structure and corresponds to the fixing block.

[0011] Furthermore, a nut is fixed to the top of the monitoring rod, the nut is threaded into the pull rod, a rotating plate is fixed to the top of the pull rod, and the pushing structure includes a pressure plate that is slidably fitted into the support column. Multiple positioning grooves are opened in the pressure plate, and multiple positioning rods are fixed on the rotating plate, with the positioning rods corresponding to the positioning grooves.

[0012] Furthermore, the pushing structure also includes a second push block that slides within the support column. A ball cup is fixed to the lower side of the second push block, and a ball head is fixed to the pressure plate. The ball head corresponds to the ball cup, and a large gap is provided between the monitoring rod and the inner wall of the support column.

[0013] Furthermore, multiple third springs are fixed between the second push block and the support column, and multiple pressure sensors are fixed around the pressure plate.

[0014] Furthermore, the monitoring structure includes a mounting plate installed on a support column. The mounting plate is fixedly connected to the support column by bolts. A mounting frame is fixed on the mounting plate, and multiple monitoring cameras are fixed around the mounting frame. The support column is provided with scale lines.

[0015] The beneficial effects of this invention are:

[0016] 1. The adjustment structure is slidably installed on the fixed base plate, and the fixed structure is installed on the adjustment structure. The fixed position of the fixed structure can be adjusted by adjusting the adjustment structure, so as to fix the device well on the ground as needed, ensuring the stability of the device. The position of the adjustment structure can be locked by the locking structure, so as to ensure the stability of the device after installation and fixation. It can also achieve clamping and fixing of the detection structure, so that the support structure and the detection structure can be moved synchronously, thus allowing for more flexible adjustment of the monitoring method and expanding the application range of the device.

[0017] 2. Installing a stabilizing structure within the detection structure increases the contact area with the soil, ensuring that the detection structure can be displaced when the ground deforms. This guarantees the detection structure's ability to monitor ground deformation. Inserting the detection structure into the ground allows for real-time monitoring of ground deformation, reducing labor costs. Furthermore, it can monitor not only small-scale deformations but also larger-scale ground deformations, preventing the device from collapsing due to ground deformation and affecting the detection results, thus ensuring the effectiveness of ground deformation detection.

[0018] 3. Installing a pushing structure between the supporting structure and the detection structure can transform the left-right movement of the ground into up-down movement for monitoring, thereby reducing the difficulty of monitoring and improving the monitoring effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of the surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0020] Figure 2 This is a schematic cross-sectional view of the overall assembly of the surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0021] Figure 3 This is a schematic diagram of the assembly structure of the second pusher and pressure plate in a surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0022] Figure 4 This is a schematic diagram of the assembly structure of the extrusion head and fixing block in a surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0023] Figure 5 This is a schematic diagram of the assembly structure of the fixed base plate and sliding block in a surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0024] Figure 6 This is an exploded view of the sliding block and ground nail in a surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0025] Figure 7 This is an exploded view of the monitoring rod and tie rod in a surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0026] Figure 8 This is a schematic diagram of the assembly cross-sectional structure of the fixed base plate in a surface deformation monitoring device for coal mine subsidence areas according to the present invention.

[0027] Figure 9 for Figure 8 A schematic diagram at point A in the middle;

[0028] In the diagram: 1. Fixed base plate; 2. Support column; 3. Scale line; 4. Mounting plate; 5. Mounting bracket; 6. Monitoring camera; 7. First slide groove; 8. Sliding block; 9. Locking groove; 10. Locking rod; 11. First through groove; 12. Second through groove; 13. Ground nail; 14. Positioning plate; 15. Locking bolt; 16. Second slide groove; 17. First push block; 18. First spring; 19. Monitoring rod; 20. Third through groove; 21. Fixed block; 23. Second spring; 24. Extrusion head; 25. Pull rod; 26. Nut; 27. Second push block; 28. Pressure plate; 29. ​​Third spring; 30. Ball head; 31. Ball cup; 32. Positioning rod; 33. Positioning groove; 34. Pressure sensor; 35. Rotating plate; 36. Clamping and fixing rod. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Please see Figures 1 to 9 The present invention provides a technical solution: a surface deformation monitoring device for coal mine subsidence areas, comprising a fixed base plate 1, a supporting structure mounted on the fixed base plate 1, an adjusting structure slidably fitted on the fixed base plate 1, a fixing structure mounted on the adjusting structure, a locking structure between the adjusting structure and the fixed base plate 1, a detection structure installed inside the supporting structure, a monitoring structure mounted on the supporting structure, the detection structure corresponding to the adjusting structure, a pushing structure between the supporting structure and the detection structure, a stabilizing structure installed inside the detection structure, and the stabilizing structure corresponding to the pushing structure.

[0031] In this embodiment, the support structure includes a support column 2 fixed on a fixed base plate 1, and the adjustment structure includes a plurality of first sliding grooves 7 opened on the fixed base plate 1. The plurality of first sliding grooves 7 are located on the periphery of the support column 2. A sliding block 8 is slidably fitted in the first sliding groove 7. The sliding block 8 corresponds to the locking structure. A first through groove 11 is opened on the sliding block 8. The fixing structure includes a ground nail 13 installed in the sliding block 8. The first through groove 11 corresponds to the ground nail 13. The ground nail 13 is a diagonal rod structure. A positioning plate 14 is fixed to the end of the ground nail 13. The positioning plate 14 corresponds to the sliding block 8 and the locking structure.

[0032] Specifically, when it is necessary to fix the base plate 1 to the ground, the position of the sliding block 8 is manually slid. After sliding to the appropriate position, the ground nail 13 is inserted into the ground through the first through groove 11, so that the ground nail 13 is fixed to the ground at an angle downward, ensuring the stability of the device, until the positioning plate 14 contacts the sliding block 8 and the base plate 1. At this time, the positioning plate 14 has greater friction and squeezes the fixed sliding block 8 and the base plate 1, thereby ensuring the stability of the device. The base plate 1 can then be fixed to the ground. The ground deformation can be monitored through the monitoring rod 19 located in the middle, thereby ensuring the monitoring effect. No manual operation is required during the monitoring process, reducing labor costs.

[0033] The locking structure includes a locking bolt 15, the bottom of which is tapered. The locking bolt 15 is threadedly engaged with the positioning plate 14 and the sliding block 8. A second sliding groove 16 is provided on both sides of the sliding block 8. A locking rod 10 is slidably engaged within the second sliding groove 16, corresponding to the locking bolt 15. Multiple locking slots 9 are provided in the first sliding groove 7, corresponding to the locking rod 10. A first push block 17 is slidably engaged within the locking slot 9, contacting the locking rod 10. A first spring 18 is fixed between the first push block 17 and the groove wall of the locking slot 9. A clamping and fixing rod 36 is fixed to the side of the sliding block 8. The support column 2 is a hollow structure. The detection structure includes a monitoring rod 19 installed within the support column 2. A second through groove 12 is provided in the first sliding groove 7, corresponding to the clamping and fixing rod 36. The monitoring rod 19 is located between the multiple clamping and fixing rods 36.

[0034] Specifically, when monitoring ground deformation over a large area is required, before installation, the sliding block 8 can be slid to allow the clamping and fixing rod 36 to pass through the second through slot 12 and contact the monitoring rod 19. Then, the position of the sliding block 8 is fixed, and the monitoring rod 19 can be clamped and fixed by the clamping and fixing rod 36. At this time, the monitoring rod 19 and the fixed base plate 1, support column 2 and other structures can move synchronously, so that the whole device can move with the deformation of the ground surface. By monitoring the position of the device through the monitoring camera 6, it is possible to monitor whether the ground surface is deformed. Thus, the device is not only suitable for monitoring ground deformation in a small area, but also for monitoring ground deformation in a large area, thus expanding the applicability of the device. When it is necessary to lock the position of the sliding block 8, the locking bolt 15 is manually screwed in, so that the locking bolt 15 connects the positioning plate 14 and the sliding block 8 together. When the locking bolt 15 moves downward, it will squeeze the locking rod 10, so that the locking rod 10 enters the locking groove 9. At the same time, it pushes the first push block 17, so that the first spring 18 is compressed, thereby locking the position of the sliding block 8 and ensuring the stability of the device. When the locking bolt 15 is removed, the first spring 18 rebounds and pushes the first push block 17, thereby pushing the locking rod 10 out of the locking groove 9, so that the sliding block 8 can slide again, ensuring that the device can be reused and reducing the operating cost of the device.

[0035] The monitoring rod 19 is a hollow structure with a threaded conical head at the bottom. The stabilizing structure includes a pull rod 25 installed inside the monitoring rod 19. Multiple third through slots 20 are opened on the periphery of the monitoring rod 19. A fixing block 21 is slidably fitted in the third through slot 20. A second spring 23 is fixed between the fixing block 21 and the monitoring rod 19. The end of the fixing block 21 is a spherical structure. A pressing head 24 is fixed at the bottom of the pull rod 25. The pressing head 24 is a conical structure and corresponds to the fixing block 21.

[0036] Specifically, the monitoring rod 19 can be inserted into the ground beforehand, so that when the ground deforms, the monitoring rod 19 can move synchronously. At this time, the ground deformation can be monitored by the movement of the monitoring rod 19. After the monitoring rod 19 is inserted, the pull rod 25 is pulled upward, which drives the extrusion head 24 to move upward, so that the extrusion head 24 extrudes the fixing block 21, thereby pushing the fixing block 21 out of the third through groove 20. At this time, the fixing block 21 enters the soil, increasing the contact area with the soil, thereby ensuring the stability of the fixation, and ensuring that the monitoring rod 19 can be displaced when the ground deforms, thus ensuring the detection results.

[0037] A nut 26 is fixed to the top of the monitoring rod 19. The nut 26 is threadedly engaged with the pull rod 25. A rotating plate 35 is fixed to the top of the pull rod 25. The pushing structure includes a pressure plate 28 that is slidably engaged in the support column 2. Multiple positioning grooves 33 are provided in the pressure plate 28. Multiple positioning rods 32 are fixed on the rotating plate 35. The positioning rods 32 correspond to the positioning grooves 33.

[0038] Specifically, when the pull rod 25 is rotated, it spirals upward or downward under the action of the nut 26, which drives the extrusion head 24 to move. After the monitoring rod 19 is installed, the support column 2 is put on and the fixed base plate 1 is fixed on the ground. At this time, the positioning rod 32 enters the positioning groove 33, thereby connecting the pull rod 25 and the pressure plate 28 together. Thus, the monitoring rod 19 drives the pull rod 25 to move, which in turn drives the pressure plate 28 to move, which in turn drives the pressure sensor 34 on the periphery to contact the inner wall of the support column 2, thereby detecting whether the ground has deformed.

[0039] The pushing structure also includes a second push block 27 that slides within the support column 2. A ball cup 31 is fixed to the lower side of the second push block 27, and a ball head 30 is fixed to the pressure plate 28. The ball head 30 corresponds to the ball cup 31. A large gap is provided between the monitoring rod 19 and the inner wall of the support column 2. Multiple third springs 29 are fixed between the second push block 27 and the support column 2. Multiple pressure sensors 34 are fixed to the periphery of the pressure plate 28. A displacement sensor is installed inside the support column 2 to monitor the displacement change of the second push block 27.

[0040] Specifically, when monitoring small-scale ground deformation, the monitoring rod 19 is used. When the ground deforms, the monitoring rod 19 moves synchronously, causing the monitoring rod 19 to move the pressure plate 28 and the second push block 27 via the pull rod 25. When lateral or oblique deformation occurs, the second push block 27 can move up and down under the action of the ball head 30 and the ball cup 31, thus converting lateral detection into vertical detection. The deformation can be monitored by the displacement sensor, eliminating the need for additional monitoring structures and reducing the cost of the device.

[0041] The monitoring structure includes a mounting plate 4 installed on a support column 2. The mounting plate 4 is fixedly connected to the support column 2 by bolts. A mounting bracket 5 is fixed on the mounting plate 4. Multiple monitoring cameras 6 are fixed around the mounting bracket 5. The support column 2 is provided with scale lines 3.

[0042] When it is necessary to monitor large-scale surface deformation, multiple support columns 2 can be fixedly installed on the ground. Mounting plates 4 can be selectively fixed on several of the support columns 2. The monitoring camera 6 on the mounting plate 4 can then monitor the position of multiple support columns 2 around the perimeter. During the detection process, the displacement changes can be displayed more intuitively through the scale lines 3, thereby ensuring the monitoring results.

[0043] Workflow: When monitoring large-scale surface deformation is required, the sliding block 8 causes the clamping and fixing rod 36 to pass through the second through slot 12 and contact the monitoring rod 19. The position of the sliding block 8 is then fixed, allowing the clamping and fixing rod 36 to hold and fix the monitoring rod 19. At this point, the monitoring rod 19, the fixed base plate 1, the support column 2, and other structures can move synchronously. Multiple support columns 2 are fixedly installed on the ground. Mounting plates 4 are selectively fixed to several of the support columns 2, allowing the monitoring camera 6 on the mounting plate 4 to monitor the surrounding area. The positions of multiple support columns 2 on the side are monitored. When the ground deforms, the support columns 2 displace, and the displacement change can be displayed intuitively through the scale line 3. When monitoring small-scale surface deformation, the monitoring rod 19 is inserted into the ground beforehand. When the ground deforms, the monitoring rod 19 moves synchronously. The ground deformation can then be monitored by the movement of the monitoring rod 19. After the monitoring rod 19 is inserted, pulling the pull rod 25 upwards will drive the extrusion head 24 upwards, causing the extrusion head 24 to extrude force against the fixed block 21. The fixing block 21 is pushed out of the third through groove 20. At this time, the fixing block 21 enters the soil, increasing the contact area with the soil, thereby ensuring the stability of the fixation. After the monitoring rod 19 is installed, the support column 2 is put on and the fixing base plate 1 is fixed to the ground. The position of the sliding block 8 is manually slid. When it is slid to the appropriate position, the ground nail 13 is inserted into the ground through the first through groove 11, so that the ground nail 13 is fixed diagonally downward in the ground to ensure the stability of the device. Until the positioning plate 14 contacts the sliding block 8 and the fixing base plate 1, the positioning plate 14 has greater friction and compression. The fixed sliding block 8 and the fixed base plate 1 are fixed. At this time, the positioning rod 32 enters the positioning groove 33, thereby connecting the pull rod 25 and the pressure plate 28 together. At this time, the monitoring rod 19 drives the pull rod 25 to move, which in turn drives the pressure plate 28 to move. This causes the pressure sensor 34 on the periphery to contact the inner wall of the support column 2, thereby detecting whether the ground has deformed. When lateral or oblique deformation occurs, the second push block 27 can move up and down under the action of the ball head 30 and the ball cup 31, which can convert the lateral detection into vertical detection. The deformation can then be monitored by the displacement sensor.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A surface deformation monitoring device for coal mine subsidence areas, comprising a fixed base plate (1), characterized in that, A support structure is mounted on the fixed base plate (1), an adjustment structure is slidably fitted on the fixed base plate (1), a fixed structure is mounted on the adjustment structure, a locking structure is installed between the adjustment structure and the fixed base plate (1), a detection structure is installed inside the support structure, a monitoring structure is mounted on the support structure, the detection structure corresponds to the adjustment structure, a pushing structure is installed between the support structure and the detection structure, a stabilizing structure is installed inside the detection structure, the stabilizing structure corresponds to the pushing structure, the locking structure includes a locking bolt (15), the bottom of the locking bolt (15) is a conical structure, the locking bolt (15) is threadedly fitted with the positioning plate (14) and the sliding block (8), and a second sliding groove (16) is opened on both sides of the sliding block (8). (16) A locking rod (10) is slidably fitted inside the first sliding groove (7), and the locking rod (10) corresponds to the locking bolt (15). Multiple locking grooves (9) are opened in the first sliding groove (7), and the locking grooves (9) correspond to the locking rod (10). A first push block (17) is slidably fitted inside the locking groove (9), and the first push block (17) contacts the locking rod (10). A first spring (18) is fixed between the first push block (17) and the groove wall of the locking groove (9). A clamping fixing rod (36) is fixed on the side of the sliding block (8). The support column (2) is a hollow structure. The detection structure includes a monitoring rod (19) installed inside the support column (2). A second through groove (12) is opened in the first sliding groove (7), and the second through groove (12) is connected to the clamping fixing rod. (36) Correspondingly, the monitoring rod (19) is located between multiple clamping and fixing rods (36). The monitoring rod (19) is a hollow structure. The bottom of the monitoring rod (19) is a threaded conical head. The stabilizing structure includes a pull rod (25) installed in the monitoring rod (19). Multiple third through slots (20) are opened on the periphery of the monitoring rod (19). A fixing block (21) is slidably fitted in the third through slot (20). A second spring (23) is fixed between the fixing block (21) and the monitoring rod (19). The end of the fixing block (21) is a spherical structure. A pressing head (24) is fixed at the bottom of the pull rod (25). The pressing head (24) is a conical structure. The pressing head (24) corresponds to the fixing block (21). The top of the monitoring rod (19) is fixed. A nut (26) is fixed, and the nut (26) is threaded with the pull rod (25). A rotating plate (35) is fixed on the top of the pull rod (25). The pushing structure includes a pressure plate (28) that is slidably fitted in the support column (2). Multiple positioning grooves (33) are provided in the pressure plate (28). Multiple positioning rods (32) are fixed on the rotating plate (35). The positioning rods (32) correspond to the positioning grooves (33). The pushing structure also includes a second push block (27) that is slidably fitted in the support column (2). A ball cup (31) is fixed on the lower side of the second push block (27). A ball head (30) is fixed on the pressure plate (28). The ball head (30) corresponds to the ball cup (31). A large gap is provided between the monitoring rod (19) and the inner wall of the support column (2).

2. The surface deformation monitoring device for coal mine subsidence areas according to claim 1, characterized in that: The support structure includes a support column (2) fixed on a fixed base plate (1), and the adjustment structure includes a plurality of first sliding grooves (7) opened on the fixed base plate (1). The plurality of first sliding grooves (7) are located on the periphery of the support column (2). A sliding block (8) is slidably fitted in the first sliding groove (7). The sliding block (8) corresponds to the locking structure.

3. The surface deformation monitoring device for coal mine subsidence areas according to claim 2, characterized in that: The sliding block (8) has a first through groove (11), and the fixing structure includes a ground nail (13) installed in the sliding block (8). The first through groove (11) corresponds to the ground nail (13). The ground nail (13) is a diagonal rod structure. The end of the ground nail (13) is fixed with a positioning plate (14). The positioning plate (14) corresponds to the sliding block (8) and corresponds to the locking structure.

4. The surface deformation monitoring device for coal mine subsidence areas according to claim 1, characterized in that: Multiple third springs (29) are fixed between the second push block (27) and the support column (2), and multiple pressure sensors (34) are fixed around the pressure plate (28).

5. A surface deformation monitoring device for coal mine subsidence areas according to claim 2, characterized in that: The monitoring structure includes a mounting plate (4) installed on a support column (2). The mounting plate (4) is fixedly connected to the support column (2) by bolts. A mounting frame (5) is fixed on the mounting plate (4). Multiple monitoring cameras (6) are fixed around the mounting frame (5). A scale line (3) is provided on the support column (2).

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