Ground wire self-locking device for electric power overhaul and operation method

Abstract

The invention belongs to the field of electric power equipment, and discloses a ground wire self-locking device for electric power overhaul and an operation method. The locking assembly comprises a fixed part and a rotating part rotationally connected with the fixed part, and a cable clamping channel is formed between the fixed part and the rotating part; when the first reset spring is in a free state, the rotating part and the fixed part are in a closed state; the ratchet wheel assembly comprises a ratchet wheel and a pawl, and the ratchet wheel is fixedly arranged at the end, close to the hinge shaft, of the rotating part. The linkage unlocking assembly is fixedly connected with the operating rod and slidably connected with the fixing part, and the output end of the linkage unlocking assembly is movably connected with the pawl and used for driving the pawl to rotate to achieve locking or unlocking; the device also comprises a conductive drainage assembly, and the conductive drainage assembly is provided with a grounding wire connecting port. The safety and efficiency of maintenance operation can be improved, self-locking is reliable, and disassembly and assembly are convenient and fast; the method is suitable for cable maintenance of transformer substations, overhead lines or other power equipment.

Description

Technical Field

[0001] The invention belongs to the field of electric power equipment, in particular to a grounding wire self-locking device for electric power maintenance and an operating method thereof. Background Art

[0002] In power systems, high-voltage maintenance work on power equipment, such as substations and overhead lines, while live or powered off, is crucial for ensuring safe grid operation. To prevent electric shock accidents caused by accidental energization of equipment, induced voltage, or misdirected power during maintenance, a temporary grounding wire is installed on the main cable being repaired. This wire short-circuits the cable to the ground, protecting operators.

[0003] There are two types of grounding clamps in widespread use. The first type uses a screw clamping mechanism to clamp the cable, while the second type uses an independent spring hook or elastic buckle to complete the locking. However, these two types of structures have significant limitations in practical applications: The first type of grounding clamp is usually assembled from multiple independent components, such as the clamp body, screw, and rotating handle. The components must be linked through threaded fit or mechanical connection, making operation more complicated. For example, the operator must first open the clamp mouth, insert the cable, and rotate the handle several times to tighten the screw. When disassembling, the handle must be rotated in the opposite direction to loosen the screw before removing the clamp body. A single disassembly and assembly operation takes a long time and requires two hands for both disassembly and assembly, seriously affecting maintenance efficiency. Although the second type of grounding clamp simplifies the number of components, it requires the additional configuration of a spring mounting seat and unlocking pull ring. Disassembly and assembly also require two hands, which also reduces maintenance efficiency.

[0004] Furthermore, the first type of grounding clamp relies on the self-locking properties of the thread, but frequent disassembly and assembly can cause the thread to slip, resulting in the clamp failing to secure the cable. The second type of grounding clamp relies on the elastic force of a spring to maintain the lock, but the spring is prone to fatigue failure after long-term use. Both of these situations can cause the grounding wire to accidentally fall off, leaving the maintenance line without grounding protection, directly threatening the safety of operators and potentially causing power grid failure. Summary of the Invention

[0005] In order to solve the above deficiencies in the prior art, the present invention aims to provide a self-locking device and operating method for grounding wires for power maintenance, so as to achieve the purpose of reliable self-locking, convenient disassembly and assembly, and improve the safety and efficiency of maintenance operations.

[0006] To achieve the above object, the technical solutions adopted by the present invention are as follows: The present invention provides a grounding wire self-locking device for power maintenance, comprising: operating lever; The locking assembly includes a fixed portion and a rotating portion rotatably connected to the fixed portion via a hinge shaft, wherein a cable clamping channel is formed between the fixed portion and the rotating portion; and further includes a first return spring sleeved on the hinge shaft, wherein the rotating portion and the fixed portion are in a closed state when the first return spring is in a free state. The ratchet assembly includes a ratchet and a pawl that forms a one-way locking engagement with the ratchet, wherein the ratchet is fixed to one end of the rotating portion close to the hinge shaft; A linkage unlocking assembly is fixedly connected to the operating rod and slidably connected to the fixed portion, and the sliding direction is along the vertical direction. The output end of the linkage unlocking assembly is movably connected to the pawl, and is used to drive the pawl to rotate so that the pawl disengages from the ratchet tooth groove or engages with the ratchet tooth groove; A conductive drainage component is used to short-circuit the cable to the ground, and a grounding wire connection port is provided on the conductive drainage component.

[0007] As a limitation of the present invention, the linkage unlocking assembly includes a sliding block, a second return spring, and a linkage rod, the sliding block being fixed to the top of the operating rod and slidably connected to the fixed portion, the fixed portion being provided with an upper limit seat and a lower limit seat for limiting the position of the sliding block, the vertical distance between the upper limit seat and the lower limit seat being greater than the height of the sliding block; The second return spring is movably sleeved in the sliding block, and its extension direction is along the vertical direction. Both ends of the second return spring extend from the sliding block, and the top end of the second return spring is fixedly connected to the upper limit seat, and the bottom end is fixedly connected to the lower limit seat. A toggle piece is provided on the sliding block. When the sliding block moves vertically, the toggle piece acts on the second return spring to deform it; the bottom end of the connecting rod is fixed to the sliding block, and the top end of the connecting rod is the output end of the linkage unlocking assembly, which is movably connected to the pawl; when the second return spring is in a free state, the pawl and the ratchet are in a locked state.

[0008] As a further limitation of the present invention: the toggle member includes an upper limit frame sleeved on the top of the sliding block and a lower limit frame sleeved on the bottom of the sliding block, the top end of the second return spring is fixedly connected to the upper limit frame, and the bottom end is fixedly connected to the lower limit frame; the upper limit frame and the lower limit frame have the same structure, and a strip hole extending in the vertical direction is provided on the side wall of the upper limit frame, and a fastener is passed through the strip hole, and the fastener is fixedly connected to the sliding block; the top end of the upper limit frame is against the upper limit seat, and the bottom end of the lower limit frame is against the lower limit seat; the maximum distance between the strip hole of the upper limit frame and the strip hole of the lower limit frame in the vertical direction is less than the vertical distance between the upper limit seat and the lower limit seat.

[0009] As a further limitation of the present invention: a triangular through hole is provided on the pawl, and the top end of the connecting rod is penetrated by the triangular through hole and slides along the inner surface of the pawl when the connecting rod moves vertically; the three vertices of the triangular through hole are respectively a locking point, a first unlocking point and a second unlocking point; a line connecting the locking point and the first unlocking point extends from the locking point to the first unlocking point to the upper right, and a line connecting the locking point and the second unlocking point extends from the locking point to the second unlocking point to the lower right; when the top end of the connecting rod is at the locking point, the pawl and the ratchet are in a locked state, and vertical upward or downward movement of the connecting rod will drive the pawl to rotate clockwise to achieve disengagement from the ratchet.

[0010] As a further definition of the present invention: the fixing portion is provided with a first protrusion convex toward the rotating portion, the rotating portion is provided with a second protrusion convex toward the fixing portion, and the cable clamping channel is a gap between the first protrusion and the second protrusion.

[0011] As a further limitation of the present invention: anti-slip structures are provided on the opposing surfaces of the first protrusion and the second protrusion.

[0012] As another limitation of the present invention, the conductive drainage assembly includes a first conductive housing fixedly mounted on the fixing portion, the first conductive housing covering the linkage unlocking assembly, and the grounding wire connection port is detachably mounted on the first conductive housing; A second conductive shell for covering the rotating part is fixedly provided on the outer periphery of the rotating part, and a third conductive shell for covering the ratchet assembly is also fixedly provided on the fixed part.

[0013] The present invention also provides an operating method based on a grounding wire self-locking device for power maintenance, the method comprising the following steps: S1. Install the grounding cable at the grounding cable connector, then install the fixed and rotating components on the cable. S2. Clamp the cable; Pulling the operating lever straight down disengages the pawl from the ratchet tooth groove, placing it in an unlocked state. The rotating portion rotates away from the fixed portion, allowing the cable to enter the cable clamping channel. The elastic force generated by the first return spring drives the rotating portion to close toward the fixed portion, so that the fixed portion and the rotating portion clamp the cable. S3. Release the cable; Lift the operating lever vertically upward, the pawl disengages from the ratchet tooth groove and is in the unlocked state; continue to lift the operating lever, the cable disengages from the cable clamping channel, and after disengagement, under the action of the elastic force of the first return spring, the first return spring drives the rotating part to rotate toward the fixed part to achieve closure.

[0014] As a limitation of the present invention: Step S2 is specifically as follows: when the operating rod is pulled downward in a straight line, the connecting rod moves downward in a straight line, and with the cooperation of the triangular through hole, the driving pawl rotates clockwise with its engagement point with the ratchet as the rotation center, and the pawl disengages from the ratchet tooth groove and is in an unlocked state; the rotating part rotates in a direction away from the fixed part, so that the cable enters the cable clamping channel, and the elastic force generated by the first return spring drives the rotating part to close toward the fixed part, so that the fixed part and the rotating part clamp the cable; at the same time, the sliding block moves downward due to the downward movement of the connecting rod, so that the second return spring is compressed. After the cable is clamped by the fixed part and the rotating part, the operating rod is released. Under the action of the elastic force of the second return spring, the operating rod moves upward to the top end of the connecting rod and returns to the locking point. At this time, the pawl and the ratchet are locked again, the rotating part cannot rotate, and the cable remains clamped.

[0015] As a further limitation of the present invention: Step S3 is specifically as follows: when the operating lever is lifted vertically upward, the connecting rod moves upward in a straight line, and with the cooperation of the triangular through hole, the driving pawl rotates clockwise with its engagement point with the ratchet as the rotation center, and the pawl disengages from the ratchet tooth groove and is in an unlocked state; the operating lever is continued to be lifted, and the cable disengages from the cable clamping channel. After disengagement, under the action of the elastic force of the first return spring, the rotating part is driven to rotate toward the fixed part to achieve closure; at the same time, the upward movement of the connecting rod drives the sliding block to move upward, so that the second return spring is compressed. After the cable leaves the cable clamping channel, the operating lever is released. Under the action of the elastic force of the second return spring, the operating rod moves downward to the top end of the connecting rod to return to the locking point. At this time, the pawl and the ratchet are locked, and the rotating part and the fixed part are in a closed state.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention comprises an operating lever, a locking assembly, a ratchet assembly, a linkage unlocking assembly and a conductive drainage assembly. During operation, the fixed portion and the rotating portion are mounted on the cable by holding the operating lever, and then the operating lever is pulled down. The linkage rod cooperates with the triangular through hole on the pawl to rotate the pawl clockwise, unlocking the ratchet. The rotating portion can rotate in a direction away from the fixed portion, and the cable enters the cable clamping channel. Subsequently, under the action of the rebound force of the first return spring, the rotating portion rotates toward the fixed portion, clamping the cable. At the same time, the sliding block also moves downward due to the downward pull of the operating lever, and the second return spring is compressed to generate elastic force. After the cable is clamped, the operating lever is released. The elastic force of the second return spring drives the operating lever to move upward to the top of the linkage rod to restore to the locking point of the triangular through hole. The pawl and the ratchet are locked again, restricting the rotating portion from rotating around the hinge axis. The rotating portion is always in a state of clamping the cable, avoiding the problem of the cable falling off due to the loosening of the rotating portion during maintenance, thereby endangering the life safety of personnel. When the device needs to be removed after maintenance is complete, lift the operating lever, and the linkage rod and sliding block rise together. The linkage rod cooperates with the triangular through-hole on the pawl, causing the pawl to rotate clockwise, unlocking the ratchet. Continue to lift the operating lever, and the cable will disengage from the cable clamping channel. After disengagement, the rotating part rotates toward the fixed part under the elastic force of the first return spring to close. At the same time, the rising sliding block causes the second return spring to be compressed. After releasing the lever, the second return spring will drive the operating lever downward until the linkage rod returns to the locking point, and the pawl and ratchet are locked again. When in use, the device can be operated with one hand to pull down the operating lever to clamp the cable or to lift up the operating lever to release the cable from the device. The entire operation can be operated with one hand, which makes disassembly and assembly convenient and improves maintenance efficiency. After the cable is clamped, the pawl and ratchet are locked to prevent the rotating part from rotating, and the self-locking is reliable, ensuring the stability of cable clamping. The cable is short-circuited to the ground through the conductive drainage component, which improves the safety of maintenance operations.

[0017] In summary, the present invention can improve the safety and efficiency of maintenance operations, and has reliable self-locking and convenient assembly and disassembly; the present invention is suitable for cable maintenance in substations, overhead lines or other power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 Schematic diagram of the three-dimensional structure of Example 1 of the present invention; Figure 2 This is an exploded view of Example 1 of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the locking assembly, ratchet assembly, and linkage unlocking assembly in Example 1 of the present invention; Figure 4 This is a schematic diagram of the main structure of the linkage unlocking component in Example 1 of the present invention; Figure 5 This is a schematic diagram of the main structure of the locking assembly, ratchet assembly, and linkage unlocking assembly in Example 1 of the present invention; Figure 6 This is a schematic diagram of the main structure of the mounting plate in Example 1 of the present invention; Figure 7 Schematic diagram of the three-dimensional structure of the mounting plate and the connecting rod in Example 1 of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of Example 1 of the present invention from another perspective.

[0020] In the figure: 1- operating lever; 2-locking assembly, 21-fixing portion, 22-hinge shaft, 23-rotating portion, 24-cable clamping channel, 25-first protrusion, 26-second protrusion, 27-first return spring; 3-ratchet assembly, 31-ratchet, 32-tooth groove, 33-mounting plate, 331-triangular through hole, 34-grip, 35-first inner surface, 36-second inner surface, 37-locking point, 38-first unlocking point, 39-second unlocking point; 4-linked unlocking assembly, 41-sliding block, 42-second return spring, 43-connecting rod, 431-through hole, 432-connecting shaft, 44-vertical plate, 45-limiting hole, 46-upper limit frame, 47-lower limit frame, 48-strip hole, 49-bolt; 5-conductive drainage assembly, 51-first conductive shell, 52-copper sheet, 53-screw; 6-upper limit seat, 7-lower limit seat, 8-second conductive shell, 9-third conductive shell, 10-arc-shaped protrusion, 11-arc-shaped groove. DETAILED DESCRIPTION

[0021] The preferred embodiment of the present invention is described below with reference to the accompanying drawings. It should be understood that the self-locking device and operating method for grounding wire for power maintenance described herein are preferred embodiments and are only used to illustrate and explain the present invention and do not constitute a limitation of the present invention.

[0022] The directional terms or positional relationships such as "upper", "lower", "left" and "right" described in the embodiment are based on the Figure 5 The orientation relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the content protected by the present invention.

[0023] Example 1 like Figures 1 to 8 As shown, this embodiment is a self-locking device for grounding wires used for power maintenance, comprising an operating lever 1, a locking assembly 2, a ratchet assembly 3, a linkage unlocking assembly 4, and a conductive drainage assembly 5. The operating lever 1 and the linkage unlocking assembly 4 work together to determine whether the ratchet assembly 3 is in the locked or unlocked state. The locked or unlocked state of the ratchet assembly 3 determines whether the rotating portion 23 in the locking assembly 2 can rotate about the hinge axis 22, thereby determining whether the cable is clamped or released from the cable clamping channel 24.

[0024] 1. Locking assembly 2; like Figure 2 、 3As shown in Figures 5 and 6, the locking assembly 2 includes a fixed portion 21 and a rotating portion 23 rotatably connected to the fixed portion 21 via a hinge shaft 22. The rotating portion 23 can rotate in a direction away from the fixed portion 21 or in a direction close to the fixed portion 21 with the hinge shaft 22 as the rotation center. A cable clamping channel 24 is formed between the fixed portion 21 and the rotating portion 23. Specifically, a first protrusion 25 convex toward the rotating portion 23 is provided on the fixed portion 21, and a second protrusion 26 convex toward the fixed portion 21 is provided on the rotating portion 23. The cable clamping channel 24 is a gap between the first protrusion 25 and the second protrusion 26. The horizontal connection distance between the vertex A of the first protrusion 25 and the vertex B of the second protrusion 26 (i.e., the straight-line distance along the left and right directions) is smaller than the diameter of the cable so that the cable can be clamped. In this embodiment, the fixed portion 21 and the rotating portion 23 are both made of conductive metal plates, the first protrusion 25 is integrally provided with the fixed portion 21, and the second protrusion 26 is integrally provided with the rotating portion 23, that is, the rotating portion 23 and the fixed portion 21 are both curved plate-like structures as a whole.

[0025] In order to increase the friction between the cable and the first protrusion 25 and the second protrusion 26 to prevent the cable from slipping, anti-slip structures are provided on the opposing surfaces of the first protrusion 25 and the second protrusion 26. In this embodiment, the anti-slip structure is a plurality of transverse stripes, that is, a plurality of transverse stripes are provided on the side of the first protrusion 25 facing the second protrusion 26 and the side of the second protrusion 26 facing the first protrusion 25. The structure of the transverse stripes is the existing technology and is not shown in the figure.

[0026] The locking assembly 2 further includes a first return spring 27 sleeved on the hinge shaft 22. One end of the first return spring 27 is fixedly connected to or abuts the rotating portion 23, and the other end is fixedly connected to or abuts the fixed portion 21. When the first return spring 27 is in a free state, the rotating portion 23 and the fixed portion 21 are as follows: Figure 5 It should be noted that the closed state here does not mean that the second protrusion 26 abuts the first protrusion 25, but rather that Figure 5 As shown in FIG, there is a cable clamping channel 24 between the second protrusion 26 of the rotating portion 23 and the first protrusion 25 of the fixing portion 21, and the width of the cable clamping channel 24 is less than the diameter of the cable. This state is the closed state. Here, the width refers to the distance in the left and right directions.

[0027] The first return spring 27 is an existing torsion spring. When the rotating part 23 rotates in a direction away from the fixed part 21, the torsion spring generates an elastic force, which is used to limit the rotating part 23 from rotating in a direction away from the fixed part 21 (i.e., along the direction of the fixed part 21). Figure 5 The auxiliary rotating portion 23 rotates in the opposite direction and is in a closed state with the fixing portion 21.

[0028] 2. Ratchet assembly 3; The ratchet assembly 3 is a prior art, such as Figure 3 As shown, it includes a ratchet 31 and a pawl that forms a one-way locking fit with the ratchet 31. The ratchet 31 is fixed to one end of the rotating part 23 near the hinge shaft 22. The pawl includes a mounting plate 33 and a latch 34 fixed to the mounting plate 33. The latch 34 is engaged with the tooth groove 32 of the ratchet 31 to form a locked state, at which time the rotating part 23 cannot rotate; the latch 34 is disengaged from the tooth groove 32 to form an unlocked state. In the unlocked state, the ratchet 31 can rotate, thereby allowing the rotating part 23 to rotate. The structure of the pawl and the ratchet 31 and the matching relationship between the two are prior art and will not be described in detail here. In this embodiment, a torsion spring is provided between the mounting plate 33 and the fixed part 21, so that the mounting plate 33 has a tendency to rotate toward the ratchet 31 and form a locked state.

[0029] 3. Operating lever 1 and linkage unlocking assembly 4; The operating rod 1 is an insulating rod, and this structure is a prior art. Figure 2 、 3 As shown, the linkage unlocking component 4 is fixedly connected to the operating rod 1 and is slidably connected to the fixed part 21, and the sliding direction is along the vertical direction (i.e., the up and down directions). The output end of the linkage unlocking component 4 is movably connected to the pawl, which is used to drive the pawl to rotate so that the pawl disengages from the tooth groove 32 of the ratchet 31 or is engaged with the tooth groove 32 of the ratchet 31.

[0030] Specifically, the linkage unlocking assembly 4 is provided at the top of the operating rod 1, and the linkage unlocking assembly 4 includes a sliding block 41, a second return spring 42 and a linkage rod 43. The sliding block 41 is a rectangular parallelepiped structure, and the sliding block 41 is fixed to the top of the operating rod 1 and is slidably connected to the fixed portion 21. Figure 8 As shown, in this embodiment, a slider is fixed on the side wall of the sliding block 41, and a slide rail is fixed on the fixed portion 21 at a position corresponding to the slider. The slider is clamped on the slide rail so that the sliding block 41 can slide in the vertical direction. The structure of the slide rail and the slider is prior art and will not be described in detail here.

[0031] like Figure 3-5 As shown, the fixed portion 21 is provided with an upper limit seat 6 and a lower limit seat 7 for limiting the position of the sliding block 41. The vertical distance between the upper limit seat 6 and the lower limit seat 7 is greater than the height of the sliding block 41, where the height refers to the distance in the upper and lower directions. The upper limit seat 6 and the lower limit seat 7 are used to limit the displacement of the sliding block 41. When the sliding block 41 moves upward to abut against the upper limit seat 6 or moves downward to abut against the lower limit seat 7, it will stop. In this embodiment, two parallel vertical plates 44 with a certain distance between them are integrally provided at the bottom of the sliding block 41. The lower limit seat 7 passes through the area between the two vertical plates 44 to facilitate limiting the position of the sliding block 41.

[0032] like Figure 3-5As shown, the second return spring 42 is movably sleeved in the sliding block 41. The second return spring 42 adopts an existing compression spring, and its expansion and contraction direction is along the vertical direction, as shown in FIG. Figure 3 As shown, the sliding block 41 is internally provided with a limiting hole 45 having a circular cross-section. The limiting hole 45 extends to both the upper and lower surfaces of the sliding block 41. This allows the second return spring 42 to extend from the top and bottom of the sliding block 41 when in a free state. The top of the second return spring 42 is fixedly connected to the upper limit seat 6, while the bottom is fixedly connected to the lower limit seat 7. A toggle member is provided on the sliding block 41. When the sliding block 41 moves vertically, the toggle member acts on the second return spring 42, causing it to deform.

[0033] The specific structure of the toggle member in this embodiment is as follows: the toggle member includes an upper limit frame 46 mounted on the top of the sliding block 41 and a lower limit frame 47 mounted on the bottom of the sliding block 41. The upper limit frame 46 and the lower limit frame 47 have the same structure, both being U-shaped frames, with the U-shaped opening of the upper limit frame 46 facing downward, while the U-shaped opening of the lower limit frame 47 faces upward. The side wall of the upper limit frame 46 is provided with a vertically extending strip hole 48. A fastener, here a conventional bolt 49, is threaded through the side wall of the sliding block 41 to securely connect the upper limit frame 46 to the sliding block 41. The side wall of the upper limit frame 46 is movably positioned between the bolt head and the side wall of the sliding block 41. When the sliding block 41 moves up and down, it drives the bolt 49 to move within the strip hole 48. The side wall of the lower limit frame 47 is also provided with a vertically extending strip hole 48 and is also secured to the side wall of the sliding block 41 by the bolt 49. The details will not be described in detail here.

[0034] The top end of the second return spring 42 is fixedly connected to the upper limit frame 46, which abuts against the upper limit seat 6. Therefore, the top end of the second return spring 42 can be considered to be indirectly fixedly connected to the upper limit seat 6; the bottom end of the second return spring 42 is fixedly connected to the lower limit frame 47. When the second return spring 42 is in the free state, the top end of the upper limit frame 46 abuts against the upper limit seat 6, and the bottom end of the lower limit frame 47 abuts against the lower limit seat 7. The maximum vertical distance L between the strip holes 48 in the upper limit frame 46 and the strip holes 48 in the lower limit frame 47 is less than the vertical distance between the upper limit seat 6 and the lower limit seat 7. That is, the upper limit frame 46 and the lower limit frame 47 further limit the stroke of the sliding block 41. This is because, when the device is actually used, the stroke of the operating rod 1 and the sliding block 41 moving up and down will not be too long. Purchasing existing slide rails will not perfectly match the stroke of the sliding block 41, and the cost of customizing slide rails of a specific length is too high. Therefore, the structure of the upper limit frame 46 and the lower limit frame 47 is used to limit the sliding block 41.

[0035] The working principle is: Figure 3-5As shown, when the operating rod 1 is lifted, the sliding block 41 moves upward, and the sliding block 41 moves upward with the lower limit frame 47, while the upper limit frame 46 does not move. Instead, the sliding block 41 and the bolt 49 passing through the upper limit frame 46 move upward, and the bolt 49 moves upward in the strip hole 48 of the upper limit frame 46. At this time, the second return spring 42 is compressed. Figure 5 When the operating rod 1 is pulled down in the state, the sliding block 41 moves downward with the upper limit frame 46, and the lower limit frame 47 does not move downward. Instead, the sliding block 41 and the bolt 49 passing through the lower limit frame 47 move downward, and the bolt 49 moves downward in the strip hole 48 of the lower limit frame 47. At this time, the second return spring 42 is also compressed.

[0036] The upper limit frame 46 and the lower limit frame 47 have another function. When the second return spring 42 is compressed, in addition to displacement along its axial direction, it also produces displacement along its radial direction. The part of the second return spring 42 located inside the sliding block 41 can be limited by the sliding block 41 to prevent radial displacement. However, the part extending from the sliding block 41 cannot be radially limited. Because the top of the upper limit frame 46 is in contact with the upper limit seat 6 when the second return spring 42 is in a free state, and the bottom of the lower limit frame 47 is in contact with the lower limit seat 7, when the sliding block 41 moves upward, the second return spring 42 is compressed so that the top of the upper limit frame 46 is pressed against the upper limit seat 6. Under the action of pressing, the upper limit frame 46 will not move in the horizontal direction, ensuring that the top of the second return spring 42 will not move horizontally. The radial direction of the second return spring 42 mentioned here refers to the horizontal direction. Similarly, when the sliding block 41 moves downward, the second return spring 42 is compressed so that the lower limit frame 47 is pressed against the lower limit seat 7, ensuring that the bottom end of the second return spring 42 does not move horizontally.

[0037] Of course, the toggle member can also be replaced with any other structure in the prior art, as long as it can ensure that the second return spring 42 can produce elastic deformation when the sliding block 41 moves up and down.

[0038] like Figure 3 、 5 -7, the bottom end of the linkage rod 43 is fixed to the top end of the sliding block 41, and the top end of the linkage rod 43 is the output end of the linkage unlocking component 4, which is movably connected to the pawl; when the second return spring 42 is in a free state, as shown in FIG. Figure 5 As shown, the pawl and the ratchet 31 are in a locked state. The specific method of the movable connection between the connecting rod 43 and the pawl is as follows: a triangular through hole 331 is provided on the mounting plate 33 of the pawl, and the top of the connecting rod 43 passes through the triangular through hole 331 and slides along the inner surface of the pawl when the connecting rod 43 moves vertically. Figure 7As shown, a through hole 431 is provided on the linkage rod 43. One of the side walls of the mounting plate 33 is penetrated by the through hole 431. The connecting shaft 432 at the top of the linkage rod 43 can contact the first inner surface 35 or the second inner surface 36. The three vertices of the triangular through hole 331 are the locking point 37, the first unlocking point 38, and the second unlocking point 39. The line connecting the locking point 37 and the first unlocking point 38 extends from the locking point 37 to the first unlocking point 38 to the upper right, and the line connecting the locking point 37 and the second unlocking point 39 extends from the locking point 37 to the second unlocking point 39 to the lower right. When the top end of the linkage rod 43 (i.e., the connecting shaft 432) is at the locking point 37, the pawl and the ratchet 31 are in a locked state. Vertical upward or downward movement of the linkage rod 43 will drive the pawl along Figure 5 The ratchet 31 is disengaged by rotating the button clockwise in the direction of the middle arrow.

[0039] 4. Conductive drainage component 5; like Figure 1 、 2 As shown, the conductive drainage component 5 is used to short-circuit the cable to the ground, which improves the safety of maintenance work. The conductive drainage component 5 is provided with a ground wire connection port for connecting the ground wire.

[0040] The conductive drainage assembly 5 includes a first conductive housing 51 fixed to the fixed portion 21. Made of a conductive metal material, the first conductive housing 51 covers the linkage unlocking assembly 4, protecting it and preventing dust. A grounding wire connection port is detachably mounted on the first conductive housing 51. A copper sheet 52 is detachably attached to the first conductive housing 51 via screws 53. The copper sheet 52 and screws 53 form the grounding wire connection port. The grounding wire is secured via the copper sheet 52 and screws 53, as is conventional practice.

[0041] 5. a second conductive shell 8 and a third conductive shell 9; like Figure 1-3 As shown, a second conductive housing 8 is fixedly mounted on the outer periphery of the rotating portion 23 to cover it, and a third conductive housing 9 is fixedly mounted on the fixed portion 21 to cover the ratchet assembly 3. Both the second conductive housing 8 and the third conductive housing 9 are made of conductive metal materials, which not only protect the rotating portion 23 and the ratchet assembly 3 but also prevent dust.

[0042] In particular, such as Figure 2 As shown, an arc-shaped protrusion 10 is provided at one end of the third conductive shell 9 facing the second conductive shell 8, and an arc-shaped groove 11 is provided at a position corresponding to the arc-shaped protrusion 10 of the second conductive shell 8. The arc-shaped protrusion 10 is embedded in the arc-shaped groove 11. When the rotating part 23 rotates, the second conductive shell 8 can rotate around the center of the arc-shaped protrusion 10, thereby ensuring the flexibility of rotation.

[0043] Example 2 This embodiment is an operating method of the self-locking device for grounding wire for power maintenance in Example 1. This embodiment includes the following steps: S1. Install the grounding wire at the grounding wire connection port, and then install the fixing portion 21 and the rotating portion 23 on the cable.

[0044] S2. Clamp the cable; Pull the operating lever 1 straight downward, and the teeth 34 of the pawl disengage from the tooth grooves 32 of the ratchet 31, and the pawl is in the unlocked state; the rotating part 23 rotates in the direction away from the fixed part 21, so that the cable enters the cable clamping channel 24, and the elastic force generated by the first return spring 27 is used to drive the rotating part 23 to close toward the fixed part 21, so that the fixed part 21 and the rotating part 23 clamp the cable.

[0045] Specifically: when the operating lever 1 is pulled downward in a straight line, the connecting rod 43 moves downward in a straight line, and the connecting shaft 432 contacts the second inner surface 36. With the cooperation of the triangular through hole 331, the driving pawl rotates clockwise with its engagement point with the ratchet 31 (that is, the position where the engagement tooth 34 engages with the tooth groove 32) as the rotation center, and the engagement tooth 34 of the pawl disengages from the tooth groove 32 of the ratchet 31 and is in an unlocked state; the rotating part 23 rotates in a direction away from the fixed part 21, so that the cable enters the cable clamping channel 24, and the elastic force generated by the first return spring 27 drives the rotating part 23 to close toward the fixed part 21, so that the fixed part 21 and the rotating part 23 clamp the cable; at the same time, the downward movement of the connecting rod 43 drives the sliding block 41 to move downward, and at this time the second return spring 42 is compressed. After the cable is clamped by the fixed portion 21 and the rotating portion 23, the operating lever 1 is released. Under the elastic force of the second return spring 42, the operating lever 1 moves upward to the top of the linkage rod 43 and returns to the locking point 37. At this time, the pawl and ratchet 31 are locked again, and the rotating portion 23 cannot rotate, and the cable remains clamped. The pawl and ratchet 31 lock the rotating portion 23 and prevent it from rotating, ensuring reliable self-locking and stable cable clamping.

[0046] S3. Release the cable after repair; Lift the operating lever 1 vertically upward, and the tooth 34 of the pawl disengages from the tooth groove 32 of the ratchet 31, and is in the unlocked state; continue to lift the operating lever 1, and the cable disengages from the cable clamping channel 24. After disengagement, under the action of the elastic force of the first return spring 27, the first return spring 27 drives the rotating part 23 to rotate toward the fixed part 21 to achieve closure.

[0047] Specifically, when the operating lever 1 is lifted vertically, the linkage rod 43 moves linearly upward, the connecting shaft 432 contacts the first inner surface 35, and, in conjunction with the triangular through-hole 331, the pawl rotates clockwise about its engagement point with the ratchet 31 (i.e., the position where the latching tooth 34 engages the tooth groove 32). The pawl disengages the tooth groove 32 of the ratchet 31, entering the unlocked state. The operating lever 1 is then lifted further, and the cable disengages the cable clamping channel 24. After disengagement, the first return spring 27 drives the rotating portion 23 to rotate toward the fixed portion 21, thereby closing the cable. Simultaneously, the upward movement of the linkage rod 43 drives the sliding block 41 upward, compressing the second return spring 42. Once the cable has exited the cable clamping channel 24, the operating lever 1 is released. Under the elastic force of the second return spring 42, the operating lever 1 moves downward to the top of the linkage rod 43, returning to the locking point 37. At this point, the pawl and ratchet 31 are locked again, and the rotating portion 23 and the fixed portion 21 return to the closed state.

[0048] When the device is in use, the operating lever 1 is pulled down by one hand to clamp the cable, or the operating lever 1 is lifted up to separate the cable from the device. The entire process can be operated with one hand, which makes disassembly and assembly convenient and improves maintenance efficiency.

[0049] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A grounding wire self-locking device for power maintenance, characterized in that: include: operating lever; The locking assembly includes a fixed portion and a rotating portion rotatably connected to the fixed portion via a hinge shaft, wherein a cable clamping channel is formed between the fixed portion and the rotating portion; The hinge further comprises a first return spring sleeved on the hinge shaft, wherein the rotating portion and the fixed portion are in a closed state when the first return spring is in a free state; The ratchet assembly includes a ratchet and a pawl that forms a one-way locking engagement with the ratchet, wherein the ratchet is fixed to one end of the rotating portion close to the hinge shaft; A linkage unlocking assembly is fixedly connected to the operating rod and slidably connected to the fixed portion, and the sliding direction is along the vertical direction. The output end of the linkage unlocking assembly is movably connected to the pawl, and is used to drive the pawl to rotate so that the pawl disengages from the ratchet tooth groove or engages with the ratchet tooth groove; A conductive drainage component is used to short-circuit the cable to the ground, and a grounding wire connection port is provided on the conductive drainage component.

2. A grounding wire self-locking device for power maintenance according to claim 1, characterized in that: The linkage unlocking assembly includes a sliding block, a second return spring and a linkage rod. The sliding block is fixed to the top of the operating rod and is slidably connected to the fixed part. The fixed part is provided with an upper limit seat and a lower limit seat for limiting the sliding block. The vertical distance between the upper limit seat and the lower limit seat is greater than the height of the sliding block. The second return spring is movably sleeved in the sliding block, and its extension direction is along the vertical direction. Both ends of the second return spring extend from the sliding block, and the top end of the second return spring is fixedly connected to the upper limit seat, and the bottom end is fixedly connected to the lower limit seat. A toggle piece is provided on the sliding block. When the sliding block moves vertically, the toggle piece acts on the second return spring to deform it; the bottom end of the connecting rod is fixed to the sliding block, and the top end of the connecting rod is the output end of the linkage unlocking assembly, which is movably connected to the pawl; when the second return spring is in a free state, the pawl and the ratchet are in a locked state.

3. A grounding wire self-locking device for power maintenance according to claim 2, characterized in that: The toggle member includes an upper limit frame sleeved on the top of the sliding block and a lower limit frame sleeved on the bottom of the sliding block, the top end of the second return spring is fixedly connected to the upper limit frame, and the bottom end is fixedly connected to the lower limit frame; the upper limit frame and the lower limit frame have the same structure, and a strip hole extending in the vertical direction is provided on the side wall of the upper limit frame, and a fastener is passed through the strip hole, and the fastener is fixedly connected to the sliding block; the top end of the upper limit frame is against the upper limit seat, and the bottom end of the lower limit frame is against the lower limit seat; the maximum distance between the strip hole of the upper limit frame and the strip hole of the lower limit frame in the vertical direction is less than the vertical distance between the upper limit seat and the lower limit seat.

4. A grounding wire self-locking device for power maintenance according to claim 2 or 3, characterized in that: A triangular through hole is provided on the pawl, and the top end of the connecting rod is passed through the triangular through hole and slides along the inner surface of the pawl when the connecting rod moves vertically; the three vertices of the triangular through hole are respectively the locking point, the first unlocking point and the second unlocking point; the line connecting the locking point and the first unlocking point extends from the locking point to the first unlocking point to the upper right, and the line connecting the locking point and the second unlocking point extends from the locking point to the second unlocking point to the lower right; when the top end of the connecting rod is at the locking point, the pawl and the ratchet are in a locked state, and the vertical upward or downward movement of the connecting rod will drive the pawl to rotate clockwise to achieve disengagement from the ratchet.

5. A grounding wire self-locking device for power maintenance according to claim 4, characterized in that: The fixing portion is provided with a first protrusion protruding toward the rotating portion, the rotating portion is provided with a second protrusion protruding toward the fixing portion, and the cable clamping channel is a gap between the first protrusion and the second protrusion.

6. A grounding wire self-locking device for power maintenance according to claim 5, characterized in that: Anti-slip structures are provided on the opposite surfaces of the first protrusion and the second protrusion.

7. A grounding wire self-locking device for power maintenance according to any one of claims 1-3 and 5-6, characterized in that: The conductive drainage assembly includes a first conductive shell fixedly mounted on the fixing portion, the first conductive shell covers the linkage unlocking assembly, and the grounding wire connection port is detachably mounted on the first conductive shell; A second conductive shell for covering the rotating part is fixedly provided on the outer periphery of the rotating part, and a third conductive shell for covering the ratchet assembly is also fixedly provided on the fixed part.

8. An operating method, based on a grounding wire self-locking device for power maintenance according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. Install the grounding cable at the grounding cable connector, then install the fixed and rotating components on the cable. S2. Clamp the cable; Pulling the operating lever straight down disengages the pawl from the ratchet tooth groove, placing it in an unlocked state. The rotating portion rotates away from the fixed portion, allowing the cable to enter the cable clamping channel. The elastic force generated by the first return spring drives the rotating portion to close toward the fixed portion, so that the fixed portion and the rotating portion clamp the cable. S3. Release the cable; Lift the operating lever vertically upward, the pawl disengages from the ratchet tooth groove and is in the unlocked state; continue to lift the operating lever, the cable disengages from the cable clamping channel, and after disengagement, under the action of the elastic force of the first return spring, the first return spring drives the rotating part to rotate toward the fixed part to achieve closure.

9. The operating method according to claim 8, characterized in that: Step S2 specifically comprises: when the operating lever is pulled downward in a straight line, the connecting rod moves downward in a straight line, and with the cooperation of the triangular through hole, the driving pawl rotates clockwise with the engagement point with the ratchet as the rotation center, and the pawl disengages from the ratchet tooth groove and is in an unlocked state; The rotating portion rotates in a direction away from the fixed portion, so that the cable enters the cable clamping channel. The elastic force generated by the first return spring drives the rotating portion to close toward the fixed portion, so that the fixed portion and the rotating portion clamp the cable; At the same time, the downward movement of the connecting rod drives the sliding block downward, which compresses the second return spring. After the cable is clamped by the fixed part and the rotating part, the operating rod is released. Under the action of the elastic force of the second return spring, the operating rod moves upward to the top end of the connecting rod and returns to the locking point. At this time, the pawl and the ratchet are locked again, the rotating part cannot rotate, and the cable remains clamped.

10. The operating method according to claim 9, characterized in that: Step S3 specifically comprises: when the operating lever is lifted vertically upward, the connecting rod moves linearly upward, and with the cooperation of the triangular through hole, the driving pawl rotates clockwise with its engagement point with the ratchet as the rotation center, and the pawl disengages from the ratchet tooth groove and enters the unlocked state; the operating lever is further lifted upward, and the cable disengages from the cable clamping channel. After disengagement, the elastic force of the first return spring drives the rotating part to rotate toward the fixed part to achieve closing; At the same time, the upward movement of the connecting rod drives the sliding block upward, causing the second return spring to be compressed. After the cable leaves the cable clamping channel, the operating rod is released. Under the action of the elastic force of the second return spring, the operating rod moves downward to the top end of the connecting rod and returns to the locking point. At this time, the pawl and the ratchet are locked, and the rotating part and the fixed part are in a closed state.

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