Transformer substation hoisting operation suspension arm movement distance monitoring device

Abstract

The invention discloses a transformer substation hoisting operation suspension arm movement distance monitoring device, and belongs to the technical field of distance monitoring. A transformer substation hoisting operation suspension arm moving distance monitoring device comprises a bottom plate, a rotating mechanism is installed in the middle of the bottom plate, a rotating plate is installed on the rotating mechanism, a suspension arm body is installed on the rotating plate, an installing base is installed on the top of the suspension arm body, a driving box is fixed to the installing base, and a distance monitoring mechanism is installed in the driving box. Supporting mechanisms are installed at the four corners of the bottom plate. The problem that when an existing hoisting mechanism works, a full-time worker needs to stand on the ground and look up with naked eyes for observation and judgment, and the working safety of a crane is affected due to low accuracy is solved, the safety distance of a hoisting arm body does not need to be manually observed with the naked eyes, the working safety of the hoisting arm body is improved, and the working efficiency is improved. And normal work of the suspension arm body is guaranteed, so that the working efficiency is improved, and dust and impurities are prevented from entering the driving box.

Description

Technical Field

[0001] The invention relates to the technical field of distance monitoring, and in particular to a device for monitoring the moving distance of a lifting arm in a lifting operation of a transformer substation. Background Art

[0002] A substation is a place in the power system that transforms voltage and current, receives electric energy and distributes electric energy. The substation in a power plant is a step-up substation, and its function is to step up the voltage of the electric energy generated by the generator and feed it into the high-voltage power grid. There are multiple dangerous areas in the substation, and a three-dimensional positioning system will be formed using base stations. Dangerous fences are divided in the dangerous areas of the substation, and distance measuring devices are usually required to measure the distance between safe areas and dangerous areas.

[0003] The Chinese patent with the publication number CN214270032U discloses a crane hoisting operation safety monitoring and early warning system, including an image acquisition module, a distance measurement module, and a main control module; the image acquisition module is used to collect ground scene image information around the hoisting operation area in real time; the distance measurement module is used to collect and measure the distance information between the hoisting mechanism and the ground workers in real time; the main control module is used to display the image information collected by the image acquisition module and obtain the distance information collected and measured by the distance measurement module, detect, extract and track human targets in real time, and issue corresponding early warning signals according to the real-time distance information between the human target and the hoisting mechanism. This patent can assist crane operators in identifying and analyzing the hoisting environment, monitor the characteristic information of personnel in the hoisting operation area and the distance between personnel and the hoisting mechanism in real time, improve the safety of operations, and reduce or avoid accidental injuries to personnel.

[0004] The above patent can only measure the distance between the personnel around the lifting mechanism and the lifting mechanism during actual use. It cannot measure the safe working distance of the lifting mechanism when the lifting mechanism is working. Therefore, full-time personnel are required to stand on the ground and look up to observe and judge with naked eyes. Low accuracy will affect the safety of the crane operation. Therefore, it does not meet the existing needs. We propose a substation lifting operation boom movement distance monitoring device. Summary of the invention

[0005] The object of the present invention is to provide a device for monitoring the moving distance of a boom during lifting operations in a substation. By measuring the safe distance of the device and the direction of the boom body on the same side where the device moves, no manual visual observation is required, thereby improving the accuracy of measurement and the safety of the operation of the boom body. At the same time, it is possible to determine whether the working direction of the boom body is offset. If offset, it is adjusted in time to ensure the normal operation of the boom body, thereby improving work efficiency, preventing dust and impurities from entering the drive box and affecting the internal components of the distance monitoring mechanism, and solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for monitoring the moving distance of a boom for lifting operations in a substation, comprising a base plate and a boom body, a rotating mechanism being installed at the middle position of the base plate, a rotating plate being installed on the rotating mechanism, the boom body being installed on the rotating plate via a mounting plate, a mounting seat being installed on the top of the boom body, a drive box being fixedly installed on the mounting seat, a distance monitoring mechanism being installed in the drive box, and support mechanisms being installed on the four corners of the base plate.

[0007] Preferably, the rotating mechanism includes a support, a limit plate, a first drive motor, a first driving gear, a first driven gear, a rotating shaft and a connecting shaft. The limit plate is installed on the top of the support, and the first driving gear is installed inside the support. The first driving gear is installed on the base plate through the rotating shaft. The first driving gear passes through the base plate and is connected to the first drive motor. The first driving gear is meshed with the first driven gear, and the connecting shaft is installed on the first driven gear.

[0008] Preferably, the lower surface of the rotating plate contacts the upper surface of the limiting plate, one end of the connecting shaft is fixed on the rotating plate, and the other end is rotatably mounted on the bottom plate.

[0009] Preferably, the distance monitoring mechanism includes a telescopic frame, a card block, a fixed frame, a laser radar, a ranging module and a hydraulic rod. One end of the telescopic frame is installed on the inner wall of the driving box, and the other end is installed in the fixed frame. The ranging module is installed in the fixed frame. The laser radar is installed at the end of the fixed frame away from the telescopic frame. The fixed frame is connected to the driving box by a hydraulic rod, and card blocks are fixed on both sides of the fixed frame.

[0010] Preferably, the ranging module includes: The receiving module is used to set the safety distance threshold for the operation of the boom body, and at the same time receive the distance between the boom body and the live equipment and the direction of the substation to be constructed measured by the laser radar; A comparison module is used to compare the received distance data with the threshold data, and to compare the direction of the construction point to be carried out in the substation with the direction of the main arm; The distance judgment module is used to judge whether the operating distance of the boom body is safe according to the comparison result. If it is judged to be unsafe, the result is fed back to the sound and light alarm to alarm; The direction judgment module is used to judge whether the operating direction of the boom body is offset according to the comparison result of the comparison module, and if there is an offset, the result is fed back to the rotating mechanism.

[0011] Preferably, the supporting mechanism includes a second driving motor, a second driving gear, a second driven gear and a belt gear. A total of four second driven gears are provided, which are rotatably mounted on four corners of the base plate respectively. A second driving gear is meshed with a second driving gear, and a driving shaft is fixedly mounted on the second driving gear. One end of the driving shaft is rotatably mounted on the base plate, and the other end is mounted on the output end of the second driving motor. A belt gear is meshed on the outer side of the second driven gear.

[0012] Preferably, the second driven gear is rotatably mounted on the base plate via a driven shaft, a threaded hole is provided in the middle of the driven shaft, an adjusting screw is threadedly mounted in the threaded hole, and the bottom of the adjusting screw passes through the threaded hole and is fixed on the anti-sliding block.

[0013] Preferably, limit slots are provided on both sides of the interior of the drive box, the distance monitoring mechanism is stuck in the limit slots, an opening is provided in front of the drive box, and an audible and visual alarm is installed on the top of the drive box.

[0014] Preferably, a mounting shaft is rotatably mounted on the top of one side of the drive box close to the opening, a baffle is mounted on the mounting shaft, and the size of the baffle is larger than the size of the opening.

[0015] Preferably, four sets of moving wheels are installed on the lower surface of the base plate, a winch is installed on the upper surface of the rotating plate located on the left side of the boom body, and a steel rope on the winch is installed on the boom body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a laser radar to measure the distance between the boom body and the live equipment and the direction of the boom body while the device is moving, and determines whether the operating distance of the boom body is safe. If not, the result is transmitted to the sound and light alarm to emit a sound and light alarm and stop the movement of the device. No manual visual observation is required, which improves the accuracy of measurement and the safety of the operation of the boom body. At the same time, it can determine whether the working direction of the boom body is offset. If offset, it is adjusted in time to ensure the normal operation of the boom body, thereby improving work efficiency. After the laser radar is used up, it is recycled into the drive box, and the baffle loses support and automatically falls to block the opening, so as to prevent dust and impurities from entering the drive box and affecting the internal components of the distance monitoring mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a device for monitoring the moving distance of a lifting arm in a substation lifting operation according to the present invention; Figure 2 It is a partial structural schematic diagram of a device for monitoring the moving distance of a lifting arm in a substation lifting operation according to the present invention; Figure 3 It is a schematic diagram of a rotating mechanism of a device for monitoring the moving distance of a lifting arm in a substation lifting operation according to the present invention; Figure 4 It is a schematic diagram of a supporting mechanism of a device for monitoring the moving distance of a lifting arm in a substation lifting operation according to the present invention; Figure 5 It is a schematic diagram of the structure of a driving box of a device for monitoring the moving distance of a lifting arm in a substation hoisting operation according to the present invention; Figure 6 A schematic diagram of a distance measuring mechanism of a device for monitoring the moving distance of a lifting arm for lifting operations in a substation according to the present invention; Figure 7 The present invention is a schematic diagram of a distance measurement module of a device for monitoring the moving distance of a lifting arm in a substation hoisting operation.

[0018] In the figure: 1. boom body; 2. winch; 3. bottom plate; 4. rotating mechanism; 41. support member; 42. limit plate; 43. first drive motor; 44. first driving gear; 45. first driven gear; 46. rotating shaft; 47. connecting shaft; 5. distance monitoring mechanism; 51. telescopic frame; 52. block; 53. fixed frame; 54. laser radar; 55. ranging module; 56. hydraulic rod; 6. supporting mechanism; 61. second drive motor; 62. second driving gear; 63. second driven gear; 64. anti-sliding block; 65. adjusting screw; 66. belt gear; 7. moving wheel; 8. rotating plate; 9. driving box; 10. mounting seat; 11. sound and light alarm; 12. mounting plate; 13. limit card slot; 14 mounting shaft; 15. baffle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to solve the problem that the existing hoisting mechanism cannot measure the safe working distance of the hoisting mechanism when it is working, it is necessary for full-time personnel to stand on the ground and rely on the naked eye to observe and judge. If the accuracy is not high, it will affect the safety of the crane operation. Please refer to Figure 1-Figure 7 , this embodiment provides the following technical solutions: A device for monitoring the moving distance of a boom in a substation hoisting operation comprises a base plate 3 and a boom body 1, a rotating mechanism 4 is installed in the middle of the base plate 3, a rotating plate 8 is installed on the rotating mechanism 4, the boom body 1 is installed on the rotating plate 8 through a mounting plate 12, a mounting seat 10 is installed on the top of the boom body 1, a drive box 9 is fixedly installed on the mounting seat 10, a distance monitoring mechanism 5 is installed in the drive box 9, and support mechanisms 6 are installed on the four corners of the base plate 3.

[0021] The rotating mechanism 4 includes a support member 41, a limit plate 42, a first driving motor 43, a first driving gear 44, a first driven gear 45, a rotating shaft 46 and a connecting shaft 47. The limit plate 42 is installed on the top of the support member 41, and the first driving gear 44 is installed inside the support member 41. The first driving gear 44 is installed on the bottom plate 3 through the rotating shaft 46. The first driving gear 44 passes through the bottom plate 3 and is connected to the first driving motor 43. The first driving gear 44 is meshed with the first driven gear 45, and the first driven gear 45 is installed with the connecting shaft 47. When the first driving motor 43 is started, the rotating shaft 46 rotates. This in turn drives the first driving gear 44 to rotate, so that the first driven gear 45 meshing with the first driving gear 44 rotates, and then drives the connecting shaft 47 to rotate. The connecting shaft 47 drives the rotating plate 8 to rotate, and the direction of the boom body 1 is adjusted. The direction of the boom body 1 can be adjusted according to the operating position of the boom body 1, ensuring the normal operation of the boom body 1. The lower surface of the rotating plate 8 contacts the upper surface of the limiting plate 42. One end of the connecting shaft 47 is fixed on the rotating plate 8, and the other end is rotatably installed on the base plate 3, which can not only support the rotating plate 8, but also will not affect the rotation of the rotating plate 8.

[0022] The distance monitoring mechanism 5 includes a telescopic frame 51, a block 52, a fixed frame 53, a laser radar 54, a distance measuring module 55 and a hydraulic rod 56. One end of the telescopic frame 51 is installed on the inner wall of the driving box 9, and the other end is installed in the fixed frame 53. The distance measuring module 55 is installed in the fixed frame 53. The laser radar 54 is installed at the end of the fixed frame 53 away from the telescopic frame 51. The fixed frame 53 and the driving box 9 are connected by a hydraulic rod 56. Blocks 52 are fixed on both sides of the fixed frame 53. The hydraulic rod 56 is started to push the fixed frame 53 forward. At this time, the telescopic frame 51 is stretched with the movement of the fixed frame 53, and the laser radar 54 is moved to the outside of the driving box 9 to measure the distance. The telescopic frame 51 can be set up The fixed frame 53 can be supported to prevent the fixed frame 53 from falling and causing damage to the laser radar 54 and the ranging module 55. The fixed frame 53 is used to protect the ranging module 55. The laser radar 54 and the ranging module 55 communicate with each other. The laser radar 54 measures the distance between the boom body 1 and the live equipment while the device moves, and transmits the measurement result to the ranging module 55. The ranging module 55 receives the measurement result of the laser radar 54, and compares the measurement result with the preset installation distance threshold. According to the comparison result, it is judged whether the operating distance of the boom body 1 is safe. If not, the result is transmitted to the sound and light alarm 11 to emit a sound and light alarm, and stop the movement of the device.

[0023] The ranging module 55 comprises: A receiving module is used to set a safety distance threshold for the operation of the boom body 1 and simultaneously receive the distance between the boom body 1 and the live equipment and the direction of the construction point to be carried out in the substation measured by the laser radar 54; A comparison module is used to compare the received distance data with the threshold data, and at the same time compare the direction of the construction point to be carried out in the substation with the direction of the boom body 1; The distance judgment module is used to judge whether the operating distance of the boom body 1 is safe according to the comparison result. If it is judged to be unsafe, the result is fed back to the sound and light alarm 11 for alarm; The direction judgment module is used to judge whether the operating direction of the boom body 1 is offset according to the comparison result of the comparison module, and if there is an offset, the result is fed back to the rotating mechanism 4.

[0024] The supporting mechanism 6 includes a second driving motor 61, a second driving gear 62, a second driven gear 63 and a belt gear 66. A total of four second driven gears 63 are provided, which are rotatably mounted on the four corners of the bottom plate 3, respectively. A second driving gear 62 is meshed with one of the second driven gears 63. A driving shaft is fixedly mounted on the second driving gear 62. One end of the driving shaft is rotatably mounted on the bottom plate 3, and the other end is mounted on the output end of the second driving motor 61. A belt gear 66 is meshed on the outer side of the second driven gear 63. Starting the second driving motor 61 rotates the driving shaft, thereby driving the second driving gear 62 to rotate. The second driving gear 62 drives the second driven gear 63 meshed with the second driving gear 62 to rotate, thereby driving the belt meshed with the second driven gear 63. The gear 66 moves, and the belt gear 66 moves to drive the remaining three second driven gears 63 to rotate, thereby causing the adjusting screw 65 to move downward. When the adjusting screw 65 drops to a certain position, the anti-sliding block 64 will contact the ground. Under the action of the belt gear 66, the adjusting screws 65 on the four second driven gears 63 all drop, thereby supporting the entire device, so that the moving wheel 7 does not contact the ground, stabilizing the entire device, and preventing the device from shifting or shaking, thereby ensuring the use effect of the device and the accuracy of the ranging result. The second driven gear 63 is rotatably mounted on the base plate 3 through a driven shaft, and a threaded hole is provided in the middle of the driven shaft, and the adjusting screw 65 is threadedly installed in the threaded hole, and the bottom of the adjusting screw 65 is fixed to the anti-sliding block 64 through the threaded hole.

[0025] Limiting slots 13 are provided on both sides of the interior of the driving box 9, and the distance monitoring mechanism 5 is stuck in the limiting slots 13, which is convenient for supporting and limiting the distance monitoring mechanism 5. When moving the distance monitoring mechanism 5 device, it can be more stable to avoid the distance monitoring mechanism 5 from tilting and affecting the normal distance measurement. An opening is provided in front of the driving box 9, and an audible and visual alarm 11 is installed on the top of the driving box 9 to facilitate the distance monitoring mechanism 5 to extend from the driving box 9 for distance measurement. The set driving box 9 can protect the distance monitoring mechanism 5 to avoid the distance monitoring mechanism 5 from being disturbed by dust and impurities when not in use, causing malfunctions and thus affecting the accuracy of distance measurement. A mounting shaft 14 is rotatably installed on the top of the side of the driving box 9 close to the opening, and a baffle 15 is installed on the mounting shaft 14. The size of 15 is larger than the size of the opening, and the hydraulic rod 56 is started to push the distance monitoring mechanism 5 forward. When the distance monitoring mechanism 5 passes through the opening, the baffle 15 is pushed upward, so that the distance monitoring mechanism 5 can smoothly extend from the opening to measure the distance. When use is completed, the distance monitoring mechanism 5 is recovered into the drive box 9, and the baffle 15 loses support and automatically falls to block the opening to prevent dust and impurities from entering the drive box 9 and affecting the internal components of the distance monitoring mechanism 5. Four groups of moving wheels 7 are installed on the lower surface of the bottom plate 3. The device is moved by the four groups of moving wheels 7, so that the device can realize mobile ranging, thereby ensuring the practicability of the device. The upper surface of the rotating plate 8 is located on the left side of the boom body 1 and is equipped with a winch 2, and the steel rope on the winch 2 is installed on the boom body 1.

[0026] In order to better realize a working method of a substation lifting operation boom movement distance monitoring device, the following steps are included: Step 1: Move the device by driving the moving wheel 7. After moving the device to the vicinity of the position where the substation needs to be operated, start the hydraulic rod 56 to push the fixed frame 53 forward, and move the laser radar 54 to the outside of the drive box 9. When the laser radar 54 passes through the opening, it pushes up the baffle 15, so that the distance monitoring mechanism 5 can be smoothly extended from the opening to measure the distance.

[0027] Step 2: The laser radar 54 transmits the measurement result to the ranging module 55. The ranging module 55 receives the measurement result of the laser radar 54 and compares the measurement result with the preset installation distance threshold. According to the comparison result, it is judged whether the operating distance of the boom body 1 is safe. If it is not safe, the result is transmitted to the sound and light alarm 11 to sound and light alarm and stop the movement of the device.

[0028] Step three: determine the working direction of the boom body 1 according to the direction measured by the laser radar 54 , and determine whether the operating direction of the boom body 1 is offset according to the direction of the boom body 1 . If there is an offset, transmit the result to the rotating mechanism 4 .

[0029] Step 4: Start the first driving motor 43 to rotate the rotating shaft 46, thereby driving the first driving gear 44 to rotate, so that the first driven gear 45 meshing with the first driving gear 44 rotates, and then drives the connecting shaft 47 to rotate, and the connecting shaft 47 drives the rotating plate 8 to rotate, and adjusts the direction of the boom body 1, and adjusts the boom body 1 to stop at the construction point of the substation.

[0030] Step 5: Start the second drive motor 61 to rotate the driving shaft, thereby driving the second driving gear 62 to rotate, the second driving gear 62 drives the second driven gear 63 meshing with the second driving gear 62 to rotate, thereby driving the belt gear 66 meshing with the second driven gear 63 to move, the movement of the belt gear 66 drives the remaining three second driven gears 63 to rotate, thereby causing the adjusting screw 65 to move downward, causing the anti-sliding block 64 to contact the ground, and causing the moving wheel 7 to stop after it stops contacting the ground.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for monitoring the moving distance of a boom during a lifting operation in a substation, comprising a base plate (3) and a boom body (1), characterized in that: A rotating mechanism (4) is installed in the middle of the base plate (3), a rotating plate (8) is installed on the rotating mechanism (4), a boom body (1) is installed on the rotating plate (8) via a mounting plate (12), a mounting seat (10) is installed on the top of the boom body (1), a drive box (9) is fixedly installed on the mounting seat (10), a distance monitoring mechanism (5) is installed in the drive box (9), and support mechanisms (6) are installed on the four corners of the base plate (3).

2. A device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 1, characterized in that: The rotating mechanism (4) comprises a support member (41), a limit plate (42), a first driving motor (43), a first driving gear (44), a first driven gear (45), a rotating shaft (46) and a connecting shaft (47); the limit plate (42) is installed on the top of the support member (41); the first driving gear (44) is installed inside the support member (41); the first driving gear (44) is installed on the bottom plate (3) via the rotating shaft (46); the first driving gear (44) passes through the bottom plate (3) and is connected to the first driving motor (43); the first driving gear (44) is meshed with the first driven gear (45); and the connecting shaft (47) is installed on the first driven gear (45).

3. A device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 2, characterized in that: The lower surface of the rotating plate (8) contacts the upper surface of the limiting plate (42); one end of the connecting shaft (47) is fixed on the rotating plate (8), and the other end is rotatably mounted on the bottom plate (3).

4. A device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 1, characterized in that: The distance monitoring mechanism (5) comprises a telescopic frame (51), a clamping block (52), a fixed frame (53), a laser radar (54), a distance measuring module (55) and a hydraulic rod (56); one end of the telescopic frame (51) is mounted on the inner wall of the driving box (9), and the other end is mounted in the fixed frame (53); the distance measuring module (55) is mounted in the fixed frame (53); the laser radar (54) is mounted on one end of the fixed frame (53) away from the telescopic frame (51); the fixed frame (53) and the driving box (9) are connected via a hydraulic rod (56); and clamping blocks (52) are fixed on both sides of the fixed frame (53).

5. A device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 4, characterized in that: The distance measurement module (55) comprises: A receiving module, used to set a safety distance threshold for the operation of the boom body (1), and simultaneously receive the distance between the boom body (1) and the live equipment and the direction of the substation construction point measured by the laser radar (54); A comparison module, used to compare the received distance data with the threshold data, and to compare the direction of the construction point of the substation with the direction of the boom body (1); A distance judgment module, used to judge whether the operating distance of the boom body (1) is safe based on the comparison result, and if it is judged to be unsafe, the result is fed back to the sound and light alarm (11) for alarm; The direction judgment module is used to judge whether the operating direction of the boom body (1) is offset according to the comparison result of the comparison module, and if there is an offset, the result is fed back to the rotating mechanism (4).

6. A device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 1, characterized in that: The support mechanism (6) comprises a second drive motor (61), a second driving gear (62), a second driven gear (63) and a belt gear (66). A total of four second driven gears (63) are provided, which are rotatably mounted on four corners of the bottom plate (3), respectively. A second driving gear (62) is meshed with one of the second driven gears (63). A driving shaft is fixedly mounted on the second driving gear (62). One end of the driving shaft is rotatably mounted on the bottom plate (3), and the other end is mounted on the output end of the second drive motor (61). The outer side of the second driven gear (63) is meshed with a belt gear (66).

7. A device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 6, characterized in that: The second driven gear (63) is rotatably mounted on the base plate (3) via a driven shaft, a threaded hole is provided in the middle of the driven shaft, an adjusting screw (65) is threadedly mounted in the threaded hole, and the bottom of the adjusting screw (65) passes through the threaded hole and is fixed on the anti-sliding block (64).

8. The device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 1, characterized in that: Limiting slots (13) are provided on both sides of the interior of the drive box (9), and the distance monitoring mechanism (5) is stuck in the limiting slots (13). An opening is provided in the front of the drive box (9), and an audible and visual alarm (11) is installed on the top of the drive box (9).

9. The device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 1, characterized in that: A mounting shaft (14) is rotatably mounted on the top of one side of the drive box (9) close to the opening, and a baffle (15) is mounted on the mounting shaft (14). The size of the baffle (15) is larger than the size of the opening.

10. The device for monitoring the moving distance of a lifting arm during lifting operation of a substation according to claim 1, characterized in that: Four sets of moving wheels (7) are installed on the lower surface of the bottom plate (3), a winch (2) is installed on the upper surface of the rotating plate (8) located on the left side of the boom body (1), and a steel rope on the winch (2) is installed on the boom body (1).

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