DC Leakage Monitoring Device

Abstract

The present invention relates to the field of leakage monitoring technology, and specifically to a direct current leakage monitoring device, comprising a mounting frame and a supporting mechanism, wherein threaded rods are rotatably connected at both ends of the mounting frame, a leakage detector is installed on the arc surfaces opposite to each other of a first clamping plate and a second clamping plate, a control mechanism is arranged on a side of a movable seat close to the connecting frame, fixed teeth are fixedly installed on both sides of a movable block, an auxiliary mechanism comprises movable teeth slidably connected to a movable component, and an adjustment mechanism is arranged between the control mechanism and the clamping component; through the mutual cooperation of the control mechanism, the auxiliary mechanism and the adjustment mechanism, the arc surface end of the clamping component is brought close to or away from, the cable to be monitored is clamped, the leakage monitor is brought into contact with the cable, and the position of the cable can be restricted at the same time, so as to avoid the cable shaking due to external force factors, thereby affecting the accuracy of the monitoring result; under the action of the threaded rod, the support mechanism can be controlled to move, the position can be adjusted to replace the object to be monitored, and the flexibility of the device can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage monitoring, and more specifically, to a DC leakage monitoring device. Background Art

[0002] DC leakage monitoring refers to the process of detecting and monitoring the leakage situation in a DC system through specific equipment and technologies. It is an important link to ensure the safe and stable operation of the DC system. It can timely detect and handle these potential safety hazards, safeguard the safety of electrical equipment, and can monitor the leakage current of the equipment in real time. When the leakage current exceeds the safety threshold, the circuit is immediately cut off to prevent the occurrence of electric shock accidents. By monitoring and controlling the leakage current in DC, the reliability of the equipment can be improved, the incidence of equipment failures can be reduced, help to timely detect leakage problems and take measures for repair, thereby extending the service life of the equipment, accurately monitoring the leakage situation, timely detecting and repairing leakage points, thereby reducing energy waste and improving energy utilization efficiency.

[0003] In actual cable monitoring, the cable may shake due to external factors, such as being blown by the wind or naturally drooping, and the shaking may cause the monitoring instrument to be unable to stably read data, thus affecting the accuracy of the monitoring results, interfering with the measurement signal, and causing deviation in the measured value. Therefore, it is necessary to maintain the stability of the object to be monitored and the monitoring instrument during monitoring. Since the diameters of the cables to be monitored may also vary, to ensure the accuracy of the monitoring results when monitoring the cables, it is necessary to be able to fix the cables according to their different diameters. At the same time, in actual applications, cables are usually grouped in several. During monitoring, it is usually not only for a single cable for monitoring. The monitoring target may be changed when needed. While ensuring the ability to adapt to the fixation of cables with different diameters, it is also necessary to be able to flexibly change the monitoring target to improve the practicability.

[0004] Therefore, the present invention provides a DC leakage monitoring device. Summary of the Invention

[0005] Aiming at the problems in the prior art that monitoring cables with different diameters and flexibly changing the monitoring object may affect the accuracy of the monitoring results, the present invention provides a DC leakage monitoring device.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A DC leakage monitoring device, including a mounting frame and a support mechanism. Both ends of the mounting frame are rotatably connected with threaded rods. The bottom ends of the threaded rods are fixedly connected with driving motors. Guide rods are respectively arranged on both sides of the threaded rods. Both ends of the guide rods are fixedly connected with the mounting frame. The support mechanism includes a movable seat and a clamping assembly. The threaded rod penetrates through the movable seat and is threadedly connected with the movable seat. The guide rod penetrates through the movable seat and is slidably connected with the movable seat. The clamping assembly includes a first clamping plate and a second clamping plate. A leakage detector is installed on the opposite arc surfaces of the first clamping plate and the second clamping plate. One ends of the first clamping plate and the second clamping plate close to the movable seat are respectively fixedly connected with gear columns. A control mechanism is arranged on one side of the movable seat close to the connecting frame. The control mechanism includes a movable assembly. The movable assembly includes a movable block and a first connecting block fixedly connected with the movable block. Fixed teeth are fixedly installed on both sides of the movable block. Auxiliary mechanisms are respectively arranged on both sides of the movable assembly. The auxiliary mechanism includes movable teeth slidably connected with the movable assembly. An adjusting mechanism is arranged between the control mechanism and the clamping assembly. The adjusting mechanism is matched with the first connecting block;

[0007] The clamping assembly is configured to clamp the cable to be monitored under the action of the control mechanism and the adjusting mechanism, so as to monitor the cable;

[0008] The control mechanism is configured to change the state of the clamping assembly by controlling the movable assembly;

[0009] The adjusting mechanism is configured to cooperate with the control mechanism to complete the movement of the clamping assembly;

[0010] The auxiliary mechanism is configured to cooperate with the gear column through the movable teeth, assist the gear column to mesh with the fixed teeth, so that the gear column starts to rotate under the drive of the movable assembly.

[0011] Preferably, the support mechanism further includes a connecting frame fixedly connected to the side of the movable seat away from the mounting frame. The clamping assembly is movably connected to the connecting frame. Both ends of the first clamping plate and the second clamping plate away from the gear column are arc-shaped. And the weight of the arc-shaped end of the clamping assembly is the same as the weight of the end connected with the connecting gear column. The gear column is a non-full tooth setting.

[0012] Preferably, the clamping assembly further includes first sliders fixedly connected to both sides of the first clamping plate and the second clamping plate. Both ends of the gear column fixedly connected with the first clamping plate are fixedly connected with first connecting shafts. Both ends of the gear column fixedly connected with the second clamping plate are fixedly connected with second connecting shafts.

[0013] Preferably, the adjusting mechanism includes a first chute, a second chute and a third chute opened on the opposite inner walls of the connecting frame. A second connecting block is fixedly connected to the side of the lower end of the first clamping plate close to the second clamping plate.

[0014] Preferably, the first sliding groove is located on the side of the second sliding groove close to the movable seat. The third sliding groove is an arc-shaped groove. The second sliding groove is composed of a straight groove section and an arc-shaped groove section. The first sliding groove and the straight groove section of the second sliding groove are arranged in parallel and have the same length.

[0015] Preferably, the first slider is matched with the second sliding groove and the third sliding groove. The first connecting shaft is matched with the first sliding groove. The third sliding groove takes the second connecting shaft as the center of the circle, and the arc-shaped groove section of the second sliding groove takes the end of the first sliding groove far from the second clamping plate as the center of the circle.

[0016] Preferably, the control mechanism further includes an installation groove opened on the side of the movable seat close to the connecting frame. A second slider is slidably connected in the installation groove. A first spring is fixedly connected to the bottom of the installation groove. One end of the first spring far from the side wall of the installation groove is fixedly connected to the second slider. An electric telescopic rod is fixedly installed on the side of the second slider far from the installation groove. The end of the electric telescopic rod far from the second slider is fixedly connected to the movable block.

[0017] Preferably, a sensor is installed on the side of the lower end of the first connecting block close to the first clamping plate. The sensor is electrically connected to the electric telescopic rod. Both sides of the first connecting block close to the first clamping plate and the second clamping plate are provided with inclined surfaces. One side of the second connecting block close to the first connecting block is provided with an inclined surface. The second connecting block is matched with the first connecting block. Both sides of the end of the movable block far from the electric telescopic rod are provided with inclined surfaces.

[0018] Preferably, the auxiliary mechanism further includes fixing grooves opened on both sides of the movable block. A group of limiting rods are fixedly connected in the fixing grooves. The limiting rods slidably penetrate through the movable teeth. The movable teeth are slidably connected to the fixing grooves. The movable teeth are always located between two adjacent teeth of the gear column. A second spring is sleeved on the outer wall of the limiting rod. One end of the second spring is fixedly connected to the movable block, and the other end is fixedly connected to the movable teeth.

[0019] Preferably, the first spring is in a compressed state under normal conditions, and the second spring is in a stretched state under normal conditions.

[0020] Advantages of the present invention:

[0021] (1) For the DC leakage monitoring device of the present invention, through the mutual cooperation of the control mechanism, the auxiliary mechanism and the adjustment mechanism, the arc-shaped end of the clamping assembly approaches or moves away from each other to clamp the cable to be monitored, so that the leakage monitor is in contact with the cable. At the same time, the position of the cable can be restricted to avoid the cable shaking due to external force factors, which will affect the accuracy of the monitoring results. Under the action of the threaded rod, the support mechanism can be controlled to move, adjust the position to replace the object to be monitored, and increase the flexibility of the device.

[0022] (2) In the DC leakage monitoring device of the present invention, the straight groove sections of the first sliding groove and the second sliding groove can adapt to cables of different diameters. When the clamping assembly clamps the cable, it will automatically adjust according to the diameter of the clamped cable and contact the cable, so that the movable assembly is fixed in the corresponding position, ensuring the stability of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the drawings and embodiments.

[0024] Figure 1 Schematic diagram of the overall structure provided by the present invention;

[0025] Figure 2 Schematic diagram of the support mechanism provided by the present invention;

[0026] Figure 3 Schematic diagram of the connection between the support mechanism and the control mechanism provided by the present invention;

[0027] Figure 4 Schematic diagram of the adjustment mechanism provided by the present invention;

[0028] Figure 5 Cross-sectional view of the support mechanism provided by the present invention;

[0029] Figure 6 Schematic diagram of the connection between the control mechanism and the clamping assembly provided by the present invention;

[0030] Figure 7 Schematic diagram of the structure of the clamping assembly and the movable assembly provided by the present invention;

[0031] Figure 8 For Figure 7 Enlarged view of part A.

[0032] In the figure: 1, mounting frame; 2, threaded rod; 3, guide rod; 4, support mechanism; 41, movable seat; 42, connecting frame; 43, clamping assembly; 431, first clamping plate; 432, second clamping plate; 433, gear column; 434, first connecting shaft; 435, second connecting shaft; 436, first slider; 5, control mechanism; 51, mounting groove; 52, second slider; 53, first spring; 54, electric telescopic rod; 55, movable assembly; 551, movable block; 552, first connecting block; 553, fixed tooth; 6, auxiliary mechanism; 61, fixed groove; 62, limiting rod; 63, movable tooth; 64, second spring; 7, adjustment mechanism; 71, first sliding groove; 72, second sliding groove; 73, third sliding groove; 74, second connecting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0034] Embodiment: As Figures 1-8 shown, the DC leakage monitoring device described in the present invention includes a mounting frame 1 and a support mechanism 4. The two ends of the mounting frame 1 are rotatably connected with threaded rods 2. The bottom ends of the threaded rods 2 are fixedly connected with driving motors. Guide rods 3 are respectively arranged on both sides of the threaded rods 2. The two ends of the guide rods 3 are fixedly connected with the mounting frame 1. The support mechanism 4 includes a movable seat 41 and a clamping assembly 43. The threaded rods 2 penetrate through the movable seat 41 and are in threaded connection with the movable seat 41. The guide rods 3 penetrate through the movable seat 41 and are in sliding connection with the movable seat 41. The clamping assembly 43 includes a first clamping plate 431 and a second clamping plate 432. A leakage monitor is installed on the opposite arc surfaces of the first clamping plate 431 and the second clamping plate 432. The ends of the first clamping plate 431 and the second clamping plate 432 close to the movable seat 41 are respectively fixedly connected with gear columns 433. A control mechanism 5 is arranged on one side of the movable seat 41 close to the connecting frame 42. The control mechanism 5 includes a movable assembly 55. The movable assembly 55 includes a movable block 551 and a first connecting block 552 fixedly connected with the movable block 551. Fixed teeth 553 are fixedly installed on both sides of the movable block 551. Auxiliary mechanisms 6 are respectively arranged on both sides of the movable assembly 55. The auxiliary mechanism 6 includes a movable tooth 63 slidably connected with the movable assembly 55. An adjusting mechanism 7 is arranged between the control mechanism 5 and the clamping assembly 43. The adjusting mechanism 7 is matched with the first connecting block 552; the clamping assembly 43 is configured to clamp the cable to be monitored under the action of the control mechanism 5 and the adjusting mechanism 7, so as to monitor the cable; the control mechanism 5 is configured to change the state of the clamping assembly 43 by controlling the movable assembly 55; the adjusting mechanism 7 is configured to cooperate with the control mechanism 5 to complete the movement of the clamping assembly 43; the auxiliary mechanism 6 is configured to assist the gear column 433 to mesh with the fixed tooth 553 through the cooperation of the movable tooth 63 and the gear column 433, so that the gear column 433 starts to rotate under the drive of the movable assembly 55.

[0035] In this embodiment, the electric telescopic rod 54 and the driving motor are started. The electric telescopic rod 54 extends so that the movable assembly 55 cooperates with the clamping assembly 43, thereby enabling the clamping assembly 43 to move. The arc ends of the first clamping plate 431 and the second clamping plate 432 move away from each other, so that the arc ends of the first clamping plate 431 and the second clamping plate 432 approach the mounting bracket 1, avoiding the clamping assembly 43 from involving the cable during the movement of the support mechanism 4. The driving motor rotates the threaded rod 2. According to the position of the cable and the actual use requirements, the support mechanism 4 is adjusted to the required position. During the movement of the support mechanism 4, the guide rod 3 can ensure the stability of the support mechanism 4. In the moving state of the support mechanism 4, the arc ends of the first clamping plate 431 and the second clamping plate 432 are in a separated state to ensure the smoothness of the movement. After being adjusted to the appropriate position, the electric telescopic rod 54 is controlled to shorten, so that the movable assembly 55 drives the first clamping plate 431 and the second clamping plate 432 to rotate and reset, clamping the cable to be monitored. The leakage detector at the arc end of the clamping assembly 43 contacts the cable to monitor the cable. When it is necessary to replace the monitoring object, the electric telescopic rod 54 is started again to make the clamping assembly 43 move away. Driven by the threaded rod 2, the support mechanism 4 moves, and cooperates with the control mechanism 5 to re-clamp the target to be monitored.

[0036] As Figures 1-5As shown, the support mechanism 4 further includes a connecting frame 42 fixedly connected to the side of the movable seat 41 away from the mounting frame 1. The clamping assembly 43 is movably connected to the connecting frame 42. The ends of the first clamping plate 431 and the second clamping plate 432 away from the gear column 433 are both arranged as arc surfaces, and the weight of the arc surface end of the clamping assembly 43 is the same as the weight of one end of the connecting gear column 433. The gear column 433 is not a full-tooth setting; the clamping assembly 43 further includes first sliders 436 fixedly connected to both sides of the first clamping plate 431 and the second clamping plate 432. First connecting shafts 434 are fixedly connected to both ends of the gear column 433 fixedly connected to the first clamping plate 431, and second connecting shafts 435 are fixedly connected to both ends of the gear column 433 fixedly connected to the second clamping plate 432; the adjusting mechanism 7 includes first chutes 71, second chutes 72, and third chutes 73 opened on the opposite inner walls of the connecting frame 42. A second connecting block 74 is fixedly connected to the side of the lower end of the first clamping plate 431 close to the second clamping plate 432; the first chute 71 is located on the side of the second chute 72 close to the movable seat 41. The third chute 73 is an arc chute. The second chute 72 is composed of a straight chute section and an arc chute section. The first chute 71 and the straight chute section of the second chute 72 are parallel and have the same length; the first slider 436 cooperates with the second chute 72 and the third chute 73, and the first connecting shaft 434 cooperates with the first chute 71. The third chute 73 takes the second connecting shaft 435 as the center of the circle, and the arc chute section of the second chute 72 takes the end of the first chute 71 away from the second clamping plate 432 as the center of the circle; the first spring 53 is in a compressed state under normal conditions, and the second spring 64 is in a stretched state under normal conditions.

[0037] In this embodiment, in the initial state, the arc ends of the first clamping plate 431 and the second clamping plate 432 are in a close state. At this time, the first connecting shaft 434 is located at one end of the first sliding groove 71 close to the second clamping plate 432, and the first slider 436 on the first clamping plate 431 is located at one end of the straight groove section of the second sliding groove 72 close to the second clamping plate 432. When it is necessary to move the arc ends of the first clamping plate 431 and the second clamping plate 432 away from each other, control the electric telescopic rod 54 to extend and drive the moving assembly 55 to move. During the movement, the first connecting block 552 pushes the second connecting block 74. Since the center position of the gear column 433 of the second clamping plate 432 remains unchanged, under the push of the moving assembly 55, the first connecting shaft 434 moves in the first sliding groove 71 in a direction away from the second clamping plate 432, and the first slider 436 on the first clamping plate 431 moves in the straight groove section of the second sliding groove 72 in a direction away from the second clamping plate 432. When the first connecting shaft 434 can no longer translate, the electric telescopic rod 54 continues to extend, so that the fixed tooth 553 meshes with the gear column 433, thereby driving the gear column 433 to rotate. The first sliders 436 on the first clamping plate 431 and the second clamping plate 432 slide in the second sliding groove 72 and the third sliding groove 73 respectively, and the arc ends of the first clamping plate 431 and the second clamping plate 432 approach the mounting bracket 1. After the first clamping plate 431 and the second clamping plate 432 are fully opened, the threaded rod 2 controls the movement of the support mechanism 4 to prevent the clamping assembly 43 from involving the cable.

[0038] As Figures 5-7 shown, the control mechanism 5 further includes a mounting groove 51 opened on one side of the movable seat 41 close to the connecting frame 42. A second slider 52 is slidably connected in the mounting groove 51. A first spring 53 is fixedly connected to the bottom of the mounting groove 51. One end of the first spring 53 away from the side wall of the mounting groove 51 is fixedly connected to the second slider 52. An electric telescopic rod 54 is fixedly installed on the side of the second slider 52 away from the mounting groove 51. One end of the electric telescopic rod 54 away from the second slider 52 is fixedly connected to the movable block 551; a sensor is installed on one side of the lower end of the first connecting block 552 close to the first clamping plate 431. The sensor is electrically connected to the electric telescopic rod 54. Both sides of the first connecting block 552 close to the first clamping plate 431 and the second clamping plate 432 are provided with inclined surfaces. One side of the second connecting block 74 close to the first connecting block 552 is provided with an inclined surface. The second connecting block 74 cooperates with the first connecting block 552. Both sides of one end of the movable block 551 away from the electric telescopic rod 54 are provided with inclined surfaces.

[0039] In this embodiment, when the electric telescopic rod 54 extends, it pushes the movable block 551 to move away from the second slider 52. During this process, the inclined surface of the first connecting block 552 abuts against the inclined surface of the second connecting block 74, pushing the second connecting block 74 to drive the first clamping plate 431 to move. At the same time, the movable block 551 is resisted by the gear post 433 of the second clamping plate 432, so that while the movable block 551 moves away from the second slider 52, it also moves towards the first clamping plate 431. The first spring 53 is stretched, and the second slider 52 slides away from the first spring 53. At this time, the fixed tooth 553 is not engaged with the gear post 433. When the first clamping plate 431 cannot continue to translate, if the electric telescopic rod 54 continues to extend, the two gear posts 433 can be respectively engaged with the fixed teeth 553 on the movable block 551, thereby driving the first clamping plate 431 and the second clamping plate 432 to rotate simultaneously. The length of the straight groove section of the first chute 71 and the second chute 72 is the adjustable range of the first clamping plate 431. For cables of different diameters, when the first clamping plate 431 and the second clamping plate 432 perform clamping, the electric telescopic rod 54 shortens, pulling the movable assembly 55 closer to the second slider 52, driving the gear post 433 to rotate. When the first slider 436 on the first clamping plate 431 slides to the connection between the arc-shaped groove section and the straight groove section of the second chute 72, when the arc-shaped ends of the first clamping plate 431 and the second clamping plate 432 are in contact with the cable according to the diameter of the clamped cable, the first connecting shaft 434 and the first slider 436 on the first clamping plate 431 cannot continue to approach the second clamping plate 432 under the restriction of the cable. When the sensor at the lower end of the first connecting block 552 detects that the vertical distance between the side of the lower end of the first clamping plate 431 close to the second clamping plate 432 and the sensor is at a fixed value, the electric telescopic rod 54 stops working. When the first connecting shaft 434 and the first slider 436 on the first clamping plate 431 are both located at one end of the first chute 71 and the second chute 72 close to the second clamping plate 432, the first spring 53 is in a natural compression state, and in other positions, the first spring 53 is in a stretched state to varying degrees.

[0040] As Figure 7 and Figure 8 shown, the auxiliary mechanism 6 further includes fixing grooves 61 opened on both sides of the movable block 551. A group of limiting rods 62 are fixedly connected in the fixing grooves 61. The limiting rods 62 slidably penetrate through the movable teeth 63. The movable teeth 63 are slidably connected with the fixing grooves 61. The movable teeth 63 are always located between two adjacent tooth teeth of the gear post 433. A second spring 64 is sleeved on the outer wall of the limiting rod 62. One end of the second spring 64 is fixedly connected with the movable block 551, and the other end is fixedly connected with the movable teeth 63.

[0041] In this embodiment, in the initial state, when the electric telescopic rod 54 extends and the movable assembly 55 moves away from the second slider 52, the movable tooth 63 is resisted by the teeth of the gear column 433, so that the second spring 64 is compressed and the movable tooth 63 moves towards the electric telescopic rod 54. During this process, the movable block 551 moves towards the first clamping plate 431. When the movable tooth 63 abuts against the side of the fixed slot 61 close to the electric telescopic rod 54, the electric telescopic rod 54 continues to extend so that the fixed tooth 553 meshes with the gear column 433, and then the first clamping plate 431 and the second clamping plate 432 can be driven to rotate. In the clamping state, the two movable teeth 63 are always located between two adjacent teeth of the gear column 433, and the second spring 64 supports the movable tooth 63 to abut against the side of the fixed slot 61 away from the electric telescopic rod 54, preventing the second clamping plate 432 from naturally drooping due to gravity.

[0042] Working principle: When in use, the mounting bracket 1 is installed on a fixed object. First, control the electric telescopic rod 54 to extend, and the movable assembly 55 moves away from the second slider 52. The first connecting block 552 pushes the second connecting block 74. At the same time, the movable assembly 55 approaches the first clamping plate 431 and pushes the first clamping plate 431 to translate. When the first connecting shaft 434 slides to the end of the first chute 71 away from the second clamping plate 432 and the first slider 436 on the first clamping plate 431 slides to the end of the straight groove section of the movable second chute 72 away from the second clamping plate 432, the electric telescopic rod 54 continues to extend so that the movable tooth 63 is squeezed by the teeth of the gear column 433, the second spring 64 is compressed, and the movable tooth 63 slides on the limiting rod 62, so that the fixed tooth 553 on the movable block 551 meshes with the gear column 433, so that the first clamping plate 431 and the second clamping plate 432 rotate simultaneously and the arc ends move away from each other. After the clamping assembly 43 is opened, control the threaded rod 2 to rotate so that the support mechanism 4 reaches the required position. Then control the electric telescopic rod 54 to shorten, so that the first clamping plate 431 and the second clamping plate 432 rotate simultaneously and the arc ends approach each other to clamp the cable. The position of the first clamping plate 431 is automatically adjusted according to the diameter of the cable. When the sensor detects that the distance between the lower end of the first clamping plate 431 and the sensor is at a fixed value, the electric telescopic rod 54 stops working. When it is necessary to change the monitoring target, open the first clamping plate 431 and the second clamping plate 432 again, and then adjust the position of the support mechanism 4.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A DC leakage monitoring device, comprising a mounting frame (1) and a support mechanism (4). Both ends of the mounting frame (1) are rotatably connected to threaded rods (2). The bottom ends of the threaded rods (2) are fixedly connected to drive motors. On both sides of the threaded rods (2), guide rods (3) are respectively arranged. Both ends of the guide rods (3) are fixedly connected to the mounting frame (1). The support mechanism (4) includes a movable seat (41), a clamping assembly (43), and a connecting frame (42) fixedly connected to the side of the movable seat (41) away from the mounting frame (1). The threaded rods (2) penetrate through the movable seat (41) and are threadedly connected to the movable seat (41). The guide rods (3) penetrate through the movable seat (41) and are slidably connected to the movable seat (41). It is characterized in that: The clamping assembly (43) includes a first clamping plate (431) and a second clamping plate (432). A leakage detector is mounted on the opposite arc surfaces of the first clamping plate (431) and the second clamping plate (432). At one end of the first clamping plate (431) and the second clamping plate (432) close to the movable seat (41), gear columns (433) are respectively fixedly connected. On one side of the movable seat (41) close to the connecting frame (42), a control mechanism (5) is provided. The control mechanism (5) includes a movable assembly (55). The movable assembly (55) includes a movable block (551) and a first connecting block (552) fixedly connected to the movable block (551). Fixed teeth (553) are fixedly installed on both sides of the movable block (551). Auxiliary mechanisms (6) are respectively arranged on both sides of the movable assembly (55). The auxiliary mechanism (6) includes a movable tooth (63) slidably connected to the movable assembly (55). An adjusting mechanism (7) is provided between the control mechanism (5) and the clamping assembly (43). The adjusting mechanism (7) cooperates with the first connecting block (552). The adjusting mechanism (7) includes a first chute (71), a second chute (72) and a third chute (73) opened on the opposite inner walls of the connecting frame (42). The first chute (71) is located on the side of the second chute (72) close to the movable seat (41). The third chute (73) is an arc chute. The second chute (72) is composed of a straight chute section and an arc chute section; The clamping assembly (43) is assembled to clamp the cable to be monitored under the action of the control mechanism (5) and the adjusting mechanism (7), so as to monitor the cable; The control mechanism (5) is assembled to change the state of the clamping assembly (43) by controlling the movable assembly (55); The adjusting mechanism (7) is assembled to cooperate with the first connecting block (552) under the action of the control mechanism (5), push the first clamping plate (431) to move, drive the gear column (433) to rotate by the fixed teeth (553), so that the first clamping plate (431) and the second clamping plate (432) rotate, thus completing the movement of the clamping assembly (43), and can adapt to the clamping of cables with different diameters under the action of the first chute (71), the second chute (72) and the third chute (73); The auxiliary mechanism (6) is assembled to cooperate with the gear column (433) through the movable tooth (63), assist the gear column (433) to engage with the fixed teeth (553), so that the gear column (433) starts to rotate under the drive of the movable assembly (55).

2. The DC leakage monitoring device according to claim 1, characterized in that: The clamping assembly (43) is movably connected to the connecting frame (42). The ends of the first clamping plate (431) and the second clamping plate (432) away from the gear column (433) are both arc-shaped, and the weight of the arc end of the clamping assembly (43) is the same as the weight of the end connected to the gear column (433). The gear column (433) is provided with non-full teeth.

3. The DC leakage monitoring device according to claim 2, characterized in that: The clamping assembly (43) further includes first sliders (436) fixedly connected to both sides of the first clamping plate (431) and the second clamping plate (432) respectively. Both ends of the gear column (433) fixedly connected to the first clamping plate (431) are fixedly connected with first connecting shafts (434), and both ends of the gear column (433) fixedly connected to the second clamping plate (432) are fixedly connected with second connecting shafts (435).

4. The DC leakage monitoring device according to claim 3, characterized in that: One side of the lower end of the first clamping plate (431) close to the second clamping plate (432) is fixedly connected with a second connecting block (74).

5. The DC leakage monitoring device according to claim 4, wherein: The straight groove sections of the first chute (71) and the second chute (72) are arranged in parallel and have the same length.

6. The DC leakage monitoring device according to claim 5, wherein: The first sliders (436) cooperate with the second chute (72) and the third chute (73) respectively. The first connecting shafts (434) cooperate with the first chute (71). The third chute (73) is centered on the second connecting shaft (435), and the arc groove section of the second chute (72) is centered on the end of the first chute (71) far from the second clamping plate (432).

7. The DC leakage monitoring device according to claim 4, characterized in that: The control mechanism (5) further includes a mounting groove (51) opened on the side of the movable seat (41) close to the connecting frame (42). A second slider (52) is slidably connected in the mounting groove (51). A first spring (53) is fixedly connected to the bottom of the mounting groove (51). One end of the first spring (53) far from the side wall of the mounting groove (51) is fixedly connected with the second slider (52). An electric telescopic rod (54) is fixedly installed on the side of the second slider (52) far from the mounting groove (51). One end of the electric telescopic rod (54) far from the second slider (52) is fixedly connected with a movable block (551).

8. The DC leakage monitoring device according to claim 7, wherein: A sensor is installed on one side of the lower end of the first connecting block (552) close to the first clamping plate (431). The sensor is electrically connected to the electric telescopic rod (54). Both sides of the first connecting block (552) close to the first clamping plate (431) and the second clamping plate (432) are arranged as inclined surfaces. One side of the second connecting block (74) close to the first connecting block (552) is arranged as an inclined surface. The second connecting block (74) cooperates with the first connecting block (552). Both sides of the end of the movable block (551) far from the electric telescopic rod (54) are arranged as inclined surfaces.

9. The DC leakage monitoring device according to claim 8, characterized in that: The auxiliary mechanism (6) further includes fixing grooves (61) opened on both sides of the movable block (551). A group of limiting rods (62) are fixedly connected in the fixing grooves (61). The limiting rods (62) slidably penetrate through the movable teeth (63). The movable teeth (63) are slidably connected to the fixing grooves (61). The movable teeth (63) are always located between two adjacent teeth of the gear column (433). A second spring (64) is sleeved on the outer wall of the limiting rod (62). One end of the second spring (64) is fixedly connected with the movable block (551), and the other end is fixedly connected with the movable teeth (63).

10. The DC leakage monitoring device according to claim 9, wherein: The first spring (53) is in a compressed state under normal conditions, and the second spring (64) is in a stretched state under normal conditions.

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