A grounding wire self-locking device for power maintenance and an operating method thereof

Abstract

The application belongs to the field of electric power equipment, and discloses a grounding wire self-locking device for electric power maintenance and an operating method. The device part comprises an operating rod, a locking assembly, a first reset spring, a ratchet assembly and a conductive drainage assembly. The locking assembly comprises a fixed part and a rotating part rotatably connected with the fixed part, and a cable clamping channel is formed between the fixed part and the rotating part. The first reset spring is in a closed state when the rotating part and the fixed part are in a free state. The ratchet assembly comprises a ratchet wheel and a pawl, and the ratchet wheel is fixed to one end of the rotating part close to the hinge shaft. The linkage unlocking assembly is fixedly connected with the operating rod and slidably connected with the fixed part. The output end of the linkage unlocking assembly is movably connected with the pawl, and is used for driving the pawl to rotate to realize locking or unlocking. The conductive drainage assembly is provided with a grounding wire connecting port. The application can improve the safety and efficiency of maintenance work, and the self-locking is reliable and convenient to disassemble and assemble. The application is suitable for cable maintenance of substations, overhead lines or other electric power equipment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of power equipment, in particular to a grounding wire self-locking device for power maintenance and an operating method. BACKGROUND

[0002] In the power system, the high-voltage live or power-off maintenance operation of power equipment such as substations and overhead lines is a key link to ensure the safe operation of the power grid. In order to prevent electric shock accidents caused by accidental live equipment, induced voltage or mis-sent power during maintenance, a grounding wire needs to be temporarily connected to the main cable to be maintained, and the cable is short-circuited to the ground through the grounding wire, thereby protecting the personal safety of the operators.

[0003] There are two types of grounding wire clamps currently in widespread use. The first type is to achieve cable clamping through a screw clamping mechanism, and the second type is to complete locking by using independent spring hooks or elastic buckles. However, these two types of structures have significant limitations in actual application:

[0004] The first type of grounding wire clamp is usually assembled by a clamp body, a screw rod, a rotating handle and other independent components. The linkage between the components is achieved through threaded cooperation or mechanical connection, and the operation is relatively complex. For example, the operator needs to first open the clamp opening, insert the cable, and rotate the handle several times to tighten the screw rod. When disassembling, the handle needs to be rotated in the opposite direction to loosen the screw rod before the clamp body can be removed. The single disassembly and assembly operation requires a long time, and both hands are needed for disassembly and assembly, which seriously affects the maintenance efficiency. The second type of grounding wire clamp simplifies the number of components, but requires additional spring mounting seats and unlocking pull rings. Both hands are needed for disassembly and assembly, which also reduces the maintenance efficiency.

[0005] In addition, the first type of grounding wire clamp relies on the self-locking property of the thread, but the screw rod may slip after frequent disassembly and assembly, resulting in the clamp body being unable to clamp the cable. The second type of grounding wire clamp relies on the elastic force of the spring to maintain locking, and the spring is prone to fatigue failure after long-term use. The above situations may cause the grounding wire to fall off unexpectedly, causing the maintenance line to lose grounding protection, directly threatening the safety of the operators, and may cause power grid failure. SUMMARY

[0006] To solve the above problems in the prior art, the present application aims to provide a grounding wire self-locking device for power maintenance and an operating method, so as to achieve the purposes of reliable self-locking, convenient disassembly and assembly, and improving the safety and efficiency of maintenance operation.

[0007] To achieve the above purposes, the technical solutions adopted by the present application are as follows:

[0008] The present application provides a grounding wire self-locking device for power maintenance, comprising:

[0009] an operating rod;

[0010] The locking assembly comprises a fixed part and a rotating part connected with the fixed part through a hinge shaft, and a cable clamping channel is formed between the fixed part and the rotating part; the locking assembly further comprises a first reset spring sleeved on the hinge shaft, and the rotating part and the fixed part are in a closed state when the first reset spring is in a free state;

[0011] The ratchet assembly comprises a ratchet and a pawl in one-way locking cooperation with the ratchet, and the ratchet is fixedly arranged on one end of the rotating part close to the hinge shaft;

[0012] The linkage unlocking assembly is fixedly connected with the operating rod and slidably connected with the fixed part in a vertical direction, and an output end of the linkage unlocking assembly is movably connected with the pawl, and is used for driving the pawl to rotate to realize that the pawl is separated from the ratchet tooth groove or clamped into the ratchet tooth groove;

[0013] The conductive drainage assembly is used for short-circuiting the cable to the ground, and the conductive drainage assembly is provided with a grounding wire connecting port.

[0014] As a limitation of the present application, the linkage unlocking assembly comprises a sliding block, a second reset spring and a linkage rod, the sliding block is fixedly arranged on the top end of the operating rod and slidably connected with the fixed part, the fixed part is provided with an upper limiting seat and a lower limiting seat for limiting the sliding block, and the vertical distance between the upper limiting seat and the lower limiting seat is greater than the height of the sliding block;

[0015] The second reset spring is movably sleeved in the sliding block, the extension direction of the second reset spring is in a vertical direction, both ends of the second reset spring extend out of the sliding block, the top end of the second reset spring is fixedly connected with the upper limiting seat, the bottom end of the second reset spring is fixedly connected with the lower limiting seat, the sliding block is provided with a pushing member, when the sliding block moves vertically, the pushing member acts on the second reset spring to deform the second reset spring, and the bottom end of the linkage rod is fixed with the sliding block, and the top end of the linkage rod is an output end of the linkage unlocking assembly, which is movably connected with the pawl; in a free state of the second reset spring, the pawl is in a locking state with the ratchet.

[0016] As a further limitation of the present application, the pushing member comprises an upper limiting frame sleeved on the top of the sliding block and a lower limiting frame sleeved on the bottom of the sliding block, the top end of the second reset spring is fixedly connected with the upper limiting frame, and the bottom end of the second reset spring is fixedly connected with the lower limiting frame; the upper limiting frame and the lower limiting frame are the same in structure, the side wall of the upper limiting frame is provided with a strip-shaped hole extending in a vertical direction, a fastener is arranged in the strip-shaped hole, and the fastener is fixedly connected with the sliding block; the top end of the upper limiting frame abuts against the upper limiting seat, and the bottom end of the lower limiting frame abuts against the lower limiting seat; the maximum distance between the strip-shaped hole of the upper limiting frame and the strip-shaped hole of the lower limiting frame in a vertical direction is less than the vertical distance between the upper limiting seat and the lower limiting seat.

[0017] As a further limitation of the application: the pawl is provided with a triangular through hole, the top end of the connecting rod is arranged through the triangular through hole and slides along the inner surface of the pawl during the vertical movement of the connecting rod; 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 upward and to the right from the locking point to the first unlocking point, and the line connecting the locking point and the second unlocking point extends downward and to the right from the locking point to the second unlocking point; when the top end of the connecting rod is located at the locking point, the pawl and the ratchet wheel are in a locked state, and the vertical upward movement or vertical downward movement of the connecting rod will drive the pawl to rotate clockwise to achieve disengagement with the ratchet wheel.

[0018] As a further limitation of the application: the fixed part is provided with a first protruding part protruding towards the rotating part, and the rotating part is provided with a second protruding part protruding towards the fixed part, and the cable clamping channel is the gap between the first protruding part and the second protruding part.

[0019] As a further limitation of the application: the opposite surfaces of the first protruding part and the second protruding part are each provided with an anti-skid structure.

[0020] As another limitation of the application: the conductive drainage assembly includes a first conductive shell fixedly arranged on the fixed part, the first conductive shell covers the linkage unlocking assembly, and the grounding wire connection port is detachably arranged on the first conductive shell.

[0021] The outer periphery of the rotating part is fixedly provided with a second conductive shell for covering it, and the fixed part is further fixedly provided with a third conductive shell for covering the ratchet wheel assembly.

[0022] The application also provides an operating method based on the grounding wire self-locking device for power maintenance, which includes the following steps:

[0023] S1. Install the grounding wire on the grounding wire connection port, and then erect the fixed part and the rotating part on the cable;

[0024] S2. Clamp the cable;

[0025] Pull the operating rod straight down, the pawl is disengaged from the ratchet tooth groove, and is in an unlocked state; rotate the rotating part away from the fixed part, so that the cable enters the cable clamping channel, and the elastic force of the first return spring is used to drive the rotating part to close towards the fixed part, so that the fixed part and the rotating part clamp the cable;

[0026] S3. Release the cable;

[0027] Vertically lift the operating rod upward, the pawl is disengaged from the ratchet tooth groove, and is in an unlocked state; continue to lift the operating rod, the cable is disengaged 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 towards the fixed part to achieve closure.

[0028] As a limitation of the application: step S2 is specifically: when the operation lever is pulled straight down, the connecting rod moves straight down, under the cooperation of the triangular through hole, the driving pawl rotates clockwise with the engagement point with the ratchet wheel as the rotation center, the pawl is disengaged from the ratchet tooth groove and is in an unlocked state; the rotating part rotates away from the fixed part, so that the cable enters the cable clamping channel, and the elastic force of the first return spring drives the rotating part to close towards the fixed part, so that the fixed part and the rotating part clamp the cable; at the same time, the connecting rod moves down to drive the sliding block to move down, so that the second return spring is compressed, and after the cable is clamped by the fixed part and the rotating part, the operation lever is released, and under the action of the elastic force of the second return spring, the operation lever moves upward to the top end of the connecting rod to restore to the locking point, at this time, the pawl is locked with the ratchet wheel again, the rotating part cannot rotate, and the cable remains clamped.

[0029] As a further limitation of the application: step S3 is specifically: when the operation lever is lifted vertically upward, the connecting rod moves upward straight, under the cooperation of the triangular through hole, the driving pawl rotates clockwise with the engagement point with the ratchet wheel as the rotation center, the pawl is disengaged from the ratchet tooth groove and is in an unlocked state; continue to lift the operation lever, the cable is disengaged from the cable clamping channel, and after disengagement, under the action of the elastic force of the first return spring, the rotating part is driven to rotate towards the fixed part to realize closing; at the same time, the connecting rod moves up to drive the sliding block to move up, so that the second return spring is compressed, and after the cable leaves the cable clamping channel, the operation lever is released, and under the action of the elastic force of the second return spring, the operation lever moves downward to the top end of the connecting rod to restore to the locking point, at this time, the pawl is locked with the ratchet wheel, and the rotating part is in a closed state with the fixed part.

[0030] Due to the adoption of the above technical scheme, compared with the prior art, the application has the beneficial effects that:

[0031] The application includes an operation lever, a locking assembly, a ratchet assembly, a linkage unlocking assembly and a conductive drainage assembly. In implementation, the handheld operation lever is erected on the cable with the fixed part and the rotating part, then the operation lever is pulled down, the connecting rod cooperates with the upper triangular through hole of the pawl to make the pawl rotate clockwise, the pawl is unlocked with the ratchet wheel, the rotating part can rotate away from the fixed part, the cable enters the cable clamping channel, then under the action of the elastic force of the first return spring, the rotating part rotates towards the fixed part to clamp the cable; at the same time, the sliding block also moves down due to the pulling down of the operation lever, the second return spring is compressed to generate an elastic force, and after the cable is clamped, the operation lever is released, the elastic force of the second return spring drives the operation lever to move upward to the top end of the connecting rod to restore to the locking point of the triangular through hole, the pawl is locked with the ratchet wheel again, the rotating part cannot rotate around the hinge shaft, and the cable is always clamped, avoiding the problem that the cable is dropped due to the loosening of the rotating part during maintenance, thereby endangering the safety of personnel life;

[0032] When the maintenance is completed and the device needs to be removed, the operating rod is lifted, the connecting rod and the sliding block are lifted together, the connecting rod is matched with the upper triangular hole of the pawl to make the pawl rotate clockwise and be unlocked with the ratchet wheel; the operating rod is continuously lifted, and the cable is separated from the cable clamping channel. After being separated, under the elastic force of the first reset spring, the rotating part rotates towards the fixed part to realize closing, and the second reset spring is compressed due to the lifting of the sliding block, and after the hand is released, the second reset spring drives the operating rod to move downwards to the connecting rod to restore to the locking point, and the pawl is locked with the ratchet wheel again;

[0033] When the device is used, the cable is clamped by pulling down the operating rod with one hand or separated from the device by lifting the operating rod, and the whole process can be operated by one hand, so that the device is convenient to disassemble and assemble, the maintenance efficiency is improved, the rotating part cannot rotate after the cable is clamped by the locking of the pawl and the ratchet wheel, the self-locking is reliable, and the stability of the cable clamping is guaranteed; the cable is short-circuited to the ground through the conductive drainage assembly, and the safety of the maintenance operation is improved.

[0034] In summary, the device can improve the safety and efficiency of the maintenance operation, the self-locking is reliable, and the device is convenient to disassemble and assemble; the device is suitable for cable maintenance of a transformer substation, an overhead line or other power equipment. BRIEF DESCRIPTION OF DRAWINGS

[0035] The application will be described in further detail below with reference to the drawings and specific embodiments.

[0036] Figure 1 It is a perspective structural schematic view of embodiment 1 of the application;

[0037] Figure 2 It is an exploded view of embodiment 1 of the application;

[0038] Figure 3 It is a perspective structural schematic view of the locking assembly, the ratchet wheel assembly and the linkage unlocking assembly in embodiment 1 of the application;

[0039] Figure 4 It is a front view structural schematic view of the linkage unlocking assembly in embodiment 1 of the application;

[0040] Figure 5 It is a front view structural schematic view of the locking assembly, the ratchet wheel assembly and the linkage unlocking assembly in embodiment 1 of the application;

[0041] Figure 6 It is a front view structural schematic view of the mounting plate in embodiment 1 of the application;

[0042] Figure 7 It is a perspective structural schematic view of the mounting plate and the connecting rod in embodiment 1 of the application;

[0043] Figure 8 It is a perspective structural schematic view of embodiment 1 of the application from another perspective.

[0044] Figure: 1 - operating rod;

[0045] 2 - locking assembly, 21 - fixed part, 22 - hinged shaft, 23 - rotating part, 24 - cable clamping channel, 25 - first protruding part, 26 - second protruding part, 27 - first reset spring;

[0046] 3 - ratchet assembly, 31 - ratchet, 32 - tooth groove, 33 - mounting plate, 331 - triangular through hole, 34 - pawl, 35 - first inner surface, 36 - second inner surface, 37 - locking point, 38 - first unlocking point, 39 - second unlocking point;

[0047] 4 - linkage unlocking assembly, 41 - sliding block, 42 - second reset spring, 43 - linkage rod, 431 - through hole, 432 - connecting shaft, 44 - vertical plate, 45 - limiting hole, 46 - upper limiting frame, 47 - lower limiting frame, 48 - strip-shaped hole, 49 - bolt;

[0048] 5 - conductive drainage assembly, 51 - first conductive shell, 52 - copper sheet, 53 - screw;

[0049] 6 - upper limiting seat, 7 - lower limiting seat, 8 - second conductive shell, 9 - third conductive shell, 10 - arc-shaped protrusion, 11 - arc-shaped groove. DETAILED DESCRIPTION

[0050] The preferred embodiments of the application will be described below with reference to the accompanying drawings. It should be understood that the grounding wire self-locking device for power maintenance and the operating method described herein are preferred embodiments, which are used to illustrate and explain the application, and do not constitute a limitation on the application.

[0051] The orientation words or position relationships such as "upper", "lower", "left" and "right" in the embodiments are based on the orientation relationship in the drawings of the present application specification, which are only for the convenience of describing the application and simplifying the description, and are not indicative or implied of the specific orientation, specific orientation structure and operation of the device or element, and therefore cannot be understood as a limitation on the content of the protection of the application. Figure 5 Embodiment 1

[0052] As

[0053] Figures 1-8 ​As shown, the embodiment is a grounding wire self-locking device for power maintenance, which comprises an operating rod 1, a locking assembly 2, a ratchet assembly 3, a linkage unlocking assembly 4 and a conductive drainage assembly 5. The operating rod 1 and the linkage unlocking assembly 4 work together to determine whether the ratchet assembly 3 is in a locked state or an unlocked state. The locked or unlocked state of the ratchet assembly 3 determines whether the rotating part 23 in the locking assembly 2 can rotate around the hinge shaft 22, and further determines whether the cable is clamped or separated from the cable clamping channel 24.

[0054] I. The locking assembly 2;

[0055] As shown in Figure 2 , 3 , 5 and 6, the locking assembly 2 comprises a fixed part 21 and a rotating part 23 connected to the fixed part 21 through a hinge shaft 22. The rotating part 23 can rotate around the hinge shaft 22 in a direction away from the fixed part 21 or in a direction close to the fixed part 21. The fixed part 21 and the rotating part 23 form a cable clamping channel 24 therebetween. Specifically, the fixed part 21 is provided with a first protruding part 25 protruding towards the rotating part 23, and the rotating part 23 is provided with a second protruding part 26 protruding towards the fixed part 21. The cable clamping channel 24 is the gap between the first protruding part 25 and the second protruding part 26. The horizontal connecting line distance (i.e. the straight line distance in the left and right directions) between the apex A of the first protruding part 25 and the apex B of the second protruding part 26 is smaller than the diameter of the cable, so as to clamp the cable. In the embodiment, the fixed part 21 and the rotating part 23 are both made of conductive metal plates. The first protruding part 25 is integrally provided with the fixed part 21, and the second protruding part 26 is integrally provided with the rotating part 23. That is, the whole of the rotating part 23 and the fixed part 21 are both in the form of a curved plate.

[0056] In order to increase the friction between the cable and the first protruding part 25 and the second protruding part 26 and avoid the cable from slipping off, the opposite surfaces of the first protruding part 25 and the second protruding part 26 are both provided with anti-slip structures. In the embodiment, the anti-slip structures are a plurality of horizontal lines, that is, the surface of the first protruding part 25 facing the second protruding part 26 and the surface of the second protruding part 26 facing the first protruding part 25 are both provided with a plurality of horizontal lines. The structure of the horizontal lines is a prior art and is not shown in the figure.

[0057] The locking assembly 2 further comprises a first reset spring 27 sleeved on the hinge shaft 22. One end of the first reset spring 27 is fixedly connected or abuts against the rotating part 23, and the other end is fixedly connected or abuts against the fixed part 21. When the first reset spring 27 is in a free state, the rotating part 23 and the fixed part 21 are in a closed state as shown in Figure 5 . It should be noted that the closed state here does not mean that the second protruding part 26 abuts against the first protruding part 25, but as shown in Figure 5As shown, a cable clamping channel 24 exists between the second protrusion 26 of the rotating part 23 and the first protrusion 25 of the fixing part 21, and the width of the cable clamping channel 24 is less than the cable diameter; this state is the closed state. Here, the width refers to the distance in the left and right directions.

[0058] The first return spring 27 is a conventional torsion spring. When the rotating part 23 rotates away from the fixed part 21, the torsion spring generates an elastic force, which is used to limit the rotating part 23 from rotating away from the fixed part 21 (i.e., along the direction of rotation). Figure 5 The rotation (in the direction of the middle arrow) can also be described as the auxiliary rotating part 23 rotating in the opposite direction and the fixed part 21 being in a closed state.

[0059] II. Ratchet assembly 3;

[0060] Ratchet assembly 3 is existing technology, such as Figure 3 As shown, the device includes a ratchet 31 and a pawl that forms a one-way locking engagement 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 locking tooth 34 fixed to the mounting plate 33. The locking tooth 34 engages with the tooth groove 32 of the ratchet 31 to form a locked state, at which time the rotating part 23 cannot rotate; the locking tooth 34 disengages 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 their engagement relationship are existing technologies 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 tends to rotate toward the ratchet 31 and form a locked state.

[0061] III. Control lever 1 and linkage unlocking component 4;

[0062] Operating lever 1 is an insulated lever; this structure is existing technology. For example... Figure 2 , 3 As shown, the linkage unlocking component 4 is fixedly connected to the operating lever 1 and slidably connected to the fixing part 21. The sliding direction is vertical (i.e., up and down). The output end of the linkage unlocking component 4 is movably connected to the pawl and is used to drive the pawl to rotate so that the pawl can disengage from the tooth groove 32 of the ratchet 31 or be engaged in the tooth groove 32 of the ratchet 31.

[0063] Specifically, the linkage unlocking component 4 is located at the top of the operating lever 1. The linkage unlocking component 4 includes a sliding block 41, a second return spring 42, and a connecting rod 43. The sliding block 41 has a cuboid structure and is fixed to the top of the operating lever 1 and slidably connected to the fixing part 21. For example... Figure 8 As shown, in this embodiment, a slider is fixedly mounted on the side wall of the sliding block 41, and a slide rail is fixedly mounted on the fixing part 21 at the position corresponding to the slider. The slider is engaged 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.

[0064] As shown in Figures 3-5 The fixed part 21 is provided with an upper limiting seat 6 and a lower limiting seat 7 for limiting the sliding block 41, and the vertical distance between the upper limiting seat 6 and the lower limiting seat 7 is greater than the height of the sliding block 41. The height refers to the distance in the upward and downward directions. The upper limiting seat 6 and the lower limiting seat 7 are used for displacement limiting of the sliding block 41, and the sliding block 41 will stop when moving upward to abut against the upper limiting seat 6 or moving downward to abut against the lower limiting seat 7. In this embodiment, two vertical plates 44 are integrally arranged at the bottom of the sliding block 41, which are parallel and have a certain interval. The lower limiting seat 7 passes through the area between the two vertical plates 44, which is convenient for limiting the sliding block 41.

[0065] As shown in Figures 3-5 The second reset spring 42 is movably sleeved in the sliding block 41, and the second reset spring 42 adopts an existing compression spring, and the extension direction is along the vertical direction. Figure 3 As shown in The sliding block 41 is internally provided with a limiting hole 45 with a circular cross section, and the limiting hole 45 extends to the upper surface and the lower surface of the sliding block 41, so that in the free state, the top end of the second reset spring 42 extends from the top end of the sliding block 41, and the bottom end extends from the bottom end of the sliding block 41. The top end of the second reset spring 42 is fixedly connected with the upper limiting seat 6 after extending out, and the bottom end is fixedly connected with the lower limiting seat 7. The sliding block 41 is provided with a pushing member, and when the sliding block 41 moves vertically, the pushing member can act on the second reset spring 42 to deform it.

[0066] The specific structure of the pushing member in this embodiment is that the pushing member includes an upper limiting frame 46 sleeved on the top of the sliding block 41 and a lower limiting frame 47 sleeved on the bottom of the sliding block 41. The upper limiting frame 46 and the lower limiting frame 47 are the same in structure and are both U-shaped frames. The U-shaped opening of the upper limiting frame 46 faces downward, and the U-shaped opening of the lower limiting frame 47 faces upward. The side wall of the upper limiting frame 46 is provided with a strip-shaped hole 48 extending in the vertical direction, and a fastener is arranged in the strip-shaped hole 48. Here, the fastener refers to an existing bolt 49, which is threadedly arranged in the side wall of the sliding block 41 to achieve fixed connection with the sliding block 41. The side wall of the upper limiting frame 46 is movably clamped between the bolt head and the side wall of the sliding block 41. When the sliding block 41 moves up and down, the bolt 49 will move in the strip-shaped hole 48. The side wall of the lower limiting frame 47 is also provided with a strip-shaped hole 48 extending in the vertical direction, and the bolt 49 is also fixedly connected with the side wall of the sliding block 41. The specific details are not described here.

[0067] The top end of the second return spring 42 is fixedly connected to the upper limit bracket 46, and the upper limit bracket 46 abuts against the upper limit seat 6. Therefore, it can be considered that the top end of the second return spring 42 is 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 bracket 47. In the free state, the top end of the upper limit bracket 46 abuts against the upper limit seat 6, and the bottom end of the lower limit bracket 47 abuts against the lower limit seat 7. The maximum vertical distance L between the strip hole 48 on the upper limit bracket 46 and the strip hole 48 on the lower limit bracket 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, in actual use of this device, the stroke of the operating lever 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 customizing slide rails of a specific length is too expensive. Therefore, the structure of the upper limit frame 46 and the lower limit frame 47 is used to limit the sliding block 41.

[0068] The working principle is as follows: Figures 3-5 As shown, when the operating lever 1 is raised, the sliding block 41 moves upward, and the sliding block 41 moves upward along with the lower limit bracket 47, while the upper limit bracket 46 does not move. Instead, the sliding block 41 and the bolt 49 passing through the upper limit bracket 46 both move upward, and the bolt 49 moves upward in the slot 48 of the upper limit bracket 46. At this time, the second return spring 42 is compressed. Conversely, in Figure 5 When the operating lever 1 is pulled down, the sliding block 41 moves down together with the upper limit bracket 46. The lower limit bracket 47 does not move down. Instead, the sliding block 41 and the bolt 49 passing through the lower limit bracket 47 both move down. The bolt 49 moves downward in the strip hole 48 of the lower limit bracket 47. At this time, the second return spring 42 will also be compressed.

[0069] The upper limit bracket 46 and lower limit bracket 47 serve another purpose: when the second return spring 42 is compressed, it generates not only axial displacement but also radial displacement. The portion of the second return spring 42 located inside the sliding block 41 can be limited by the sliding block 41, restricting its radial displacement. However, the portion extending out of the sliding block 41 cannot be radially limited. In the free state, the top of the upper limit bracket 46 abuts against the upper limit seat 6, and the bottom of the lower limit bracket 47 abuts against the lower limit seat 7. When the sliding block 41 moves upward, the second return spring 42 is compressed, causing the top of the upper limit bracket 46 to press firmly against the upper limit seat 6. Under this pressing action, the upper limit bracket 46 will not move horizontally, ensuring that the top of the second return spring 42 will not move horizontally. Here, the radial direction of the second return spring 42 refers to the horizontal direction. Similarly, when the sliding block 41 moves downward, the second return spring 42 is compressed, causing the lower limit bracket 47 to abut against the lower limit seat 7, ensuring that the bottom end of the second return spring 42 will not move horizontally.

[0070] Of course, the toggle member can also be replaced by any other structure in the prior art, as long as it can ensure that the second return spring 42 can be elastically deformed when the sliding block 41 moves up and down.

[0071] As shown in Figure 3 , 5 Figure 7, the bottom end of the connecting rod 43 is fixed to the top end of the sliding block 41, and the top end of the connecting rod 43 is the output end of the linkage unlocking assembly 4, which is movably connected with the pawl. In the free state of the second return spring 42, as shown in Figure 5 , the pawl and the ratchet wheel 31 are in a locked state. The connecting rod 43 and the pawl are movably connected in the following manner: a triangular hole 331 is provided on the mounting plate 33 of the pawl, and the top end of the connecting rod 43 passes through the triangular hole 331 and slides along the inner surface of the pawl during vertical movement of the connecting rod 43. As shown in Figure 7 , a through hole 431 is provided on the connecting rod 43, and one of the side walls of the mounting plate 33 passes through the through hole 431, and the connecting shaft 432 at the top of the connecting rod 43 can be in contact with the first inner surface 35 or the second inner surface 36. The three vertices of the triangular hole 331 are respectively 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 upward and to the right from the locking point 37 to the first unlocking point 38, and the line connecting the locking point 37 and the second unlocking point 39 extends downward and to the right from the locking point 37 to the second unlocking point 39; when the top end of the connecting rod 43 (i.e. the connecting shaft 432) is located at the locking point 37, the pawl and the ratchet wheel 31 are in a locked state, and vertical upward movement or vertical downward movement of the connecting rod 43 will drive the pawl to rotate clockwise in the direction of the arrow in Figure 5 , so as to achieve disengagement from the ratchet wheel 31.

[0072] Four, the conductive drainage assembly 5;

[0073] As shown in Figure 1 , 2 , the conductive drainage assembly 5 is used to short the cable to the ground, improving the safety of maintenance work, and the conductive drainage assembly 5 is provided with a grounding wire connection port for connecting the grounding wire.

[0074] The conductive drainage assembly 5 includes a first conductive housing 51 fixedly arranged on the fixed portion 21, and the first conductive housing 51 is made of conductive metal material. The first conductive housing 51 covers the linkage unlocking assembly 4, which not only protects the linkage unlocking assembly 4, but also prevents dust. The grounding wire connection port is detachably arranged on the first conductive housing 51, and a copper sheet 52 is detachably arranged on the first conductive housing 51 through a screw 53. The copper sheet 52 and the screw 53 constitute the grounding wire connection port, and the grounding wire is fixed to the copper sheet 52 and the screw 53 by the prior art.

[0075] V. Second conductive outer shell 8 and third conductive outer shell 9;

[0076] like Figures 1-3 As shown, a second conductive housing 8 is fixedly provided on the outer periphery of the rotating part 23 to cover it, and a third conductive housing 9 is also fixedly provided on the fixing part 21 to cover the ratchet assembly 3. Both the second conductive housing 8 and the third conductive housing 9 are made of conductive metal material, which not only protects the rotating part 23 and the ratchet assembly 3, but also prevents dust.

[0077] In particular, such as Figure 2 As shown, the third conductive shell 9 has an arc-shaped protrusion 10 at one end facing the second conductive shell 8, and the second conductive shell 8 has an arc-shaped groove 11 at the position corresponding to the arc-shaped protrusion 10. 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, ensuring the flexibility of rotation.

[0078] Example 2

[0079] This embodiment describes the operation method of the self-locking grounding wire device for power maintenance in Embodiment 1. This embodiment includes the following steps:

[0080] S1. Install the grounding wire at the grounding wire connection port, and then mount the fixing part 21 and the rotating part 23 on the cable.

[0081] S2. Clamp the cable;

[0082] Pull the operating lever 1 straight down, and the pawl teeth 34 disengage from the grooves 32 of the ratchet 31, and are in the unlocked state; the rotating part 23 rotates away from the fixed part 21, so that the cable enters the cable clamping channel 24. The elastic force generated by the first return spring 27 is used to drive the rotating part 23 to close towards the fixed part 21, so that the fixed part 21 and the rotating part 23 clamp the cable.

[0083] Specifically, when the operation lever 1 is pulled straight down, the connecting rod 43 moves straight down, the connecting shaft 432 contacts the second inner surface 36, under the cooperation of the triangular through hole 331, the pawl is driven to rotate clockwise around the engagement point (i.e., the position where the teeth 34 engage with the tooth grooves 32) between the pawl and the ratchet wheel 31, the teeth 34 of the pawl are disengaged from the tooth grooves 32 of the ratchet wheel 31, and the pawl is in an unlocked state; the rotating part 23 rotates away from the fixed part 21, so that the cable enters the cable clamping passage 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 connecting rod 43 moves down to drive the sliding block 41 to move down, and the second return spring 42 is compressed at this time. After the cable is clamped by the fixed part 21 and the rotating part 23, the operation lever 1 is released, and under the elastic force of the second return spring 42, the operation lever 1 moves upward to the top end of the connecting rod 43 to restore to the locking point 37, at which time the pawl is locked with the ratchet wheel 31 again, the rotating part 23 cannot rotate, and the cable remains clamped.

[0084] S3. Loosen the cable after maintenance;

[0085] The operation lever 1 is lifted vertically upward, the teeth 34 of the pawl are disengaged from the tooth grooves 32 of the ratchet wheel 31, and the pawl is in an unlocked state; the operation lever 1 is continuously lifted upward, the cable is disengaged from the cable clamping passage 24, and after disengagement, under 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.

[0086] Specifically, when the operation lever 1 is lifted vertically upward, the connecting rod 43 moves straight up, the connecting shaft 432 contacts the first inner surface 35, under the cooperation of the triangular through hole 331, the pawl is driven to rotate clockwise around the engagement point (i.e., the position where the teeth 34 engage with the tooth grooves 32) between the pawl and the ratchet wheel 31, and the pawl is disengaged from the tooth grooves 32 of the ratchet wheel 31, and the pawl is in an unlocked state. The operation lever 1 is continuously lifted upward, the cable is disengaged from the cable clamping passage 24, and after disengagement, under 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; at the same time, the connecting rod 43 moves up to drive the sliding block 41 to move up, so that the second return spring 42 is compressed, and after the cable leaves the cable clamping passage 24, the operation lever 1 is released, and under the elastic force of the second return spring 42, the operation lever 1 moves downward to the top end of the connecting rod 43 to restore to the locking point 37, at which time the pawl is locked with the ratchet wheel 31 again, and the rotating part 23 and the fixed part 21 restore to a closed state.

[0087] The device can clamp the cable by pulling the operation lever 1 down with one hand or disengage the cable from the device by lifting the operation lever 1, and the whole process can be operated with one hand, which is convenient to disassemble and assemble and improves the maintenance efficiency.

[0088] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the above embodiments, those skilled in the art can modify the technical solutions described in the embodiments or equivalently replace some technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-locking device for a grounding line for electric power maintenance, characterized by, The utility model relates to a cable clamp, comprising: an operating rod; a locking assembly comprising a fixed part and a rotating part connected to the fixed part by a hinge shaft, a cable clamping channel being formed between the fixed part and the rotating part; a first reset spring is sleeved on the hinge shaft, and the rotating part and the fixed part are in a closed state when the first reset spring is in a free state; a ratchet assembly comprising a ratchet and a pawl in one-way locking cooperation with the ratchet, the ratchet being fixed to one end of the rotating part close to the hinge shaft; a linkage unlocking assembly is fixedly connected to the operating rod and slidably connected to the fixed part in a vertical direction, and the output end of the linkage unlocking assembly is movably connected to the pawl to drive the pawl to rotate and achieve the disengagement or engagement of the pawl from / to the ratchet tooth groove; a conductive drainage assembly for short-circuiting the cable to the ground, the conductive drainage assembly being provided with a grounding wire connecting port; the linkage unlocking assembly comprises a sliding block, a second reset spring and a linkage rod, the sliding block being fixed to the top end of the operating rod and slidably connected to the fixed part, the fixed part being 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 being greater than the height of the sliding block; the second reset spring is movably sleeved in the sliding block, the extension direction of the second reset spring being vertical, both ends of the second reset spring extending out of the sliding block, the top end of the second reset spring being fixedly connected to the upper limit seat, and the bottom end being fixedly connected to the lower limit seat, the sliding block being provided with a knob, the knob being used to deform the second reset spring when the sliding block moves vertically, and the bottom end of the linkage rod being fixed to the sliding block, the top end of the linkage rod being the output end of the linkage unlocking assembly and being movably connected to the pawl; 2. The self-locking device for grounding wire of power overhaul according to claim 1, characterized in that, the second reset spring is in a free state, and the pawl and the ratchet are in a locking state.

3. The self-locking device for grounding wire of power overhaul according to claim 1 or 2, characterized in that, the knob comprises 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 reset spring being fixedly connected to the upper limit frame, and the bottom end being fixedly connected to the lower limit frame; the upper limit frame and the lower limit frame are structurally identical, the side wall of the upper limit frame being provided with a strip-shaped hole extending in a vertical direction, a fastener being arranged in the strip-shaped hole and being fixedly connected to the sliding block, the top end of the upper limit frame abutting against the upper limit seat, and the bottom end of the lower limit frame abutting against the lower limit seat; the maximum distance between the strip-shaped hole of the upper limit frame and the strip-shaped 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. The self-locking device for grounding wire of power overhaul according to claim 3, characterized in that, the pawl is provided with a triangular through hole, the top end of the linkage rod penetrating through the triangular through hole and sliding along the inner surface of the pawl when the linkage rod moves vertically; the three vertices of the triangular through hole are a locking point, a first unlocking point and a second unlocking point, respectively; the line connecting the locking point and the first unlocking point extends upward and to the right from the locking point to the first unlocking point, and the line connecting the locking point and the second unlocking point extends downward and to the right from the locking point to the second unlocking point; when the top end of the linkage rod is located at the locking point, the pawl and the ratchet are in a locking state, and the vertical upward movement or vertical downward movement of the linkage rod drives the pawl to rotate clockwise to achieve the disengagement from the ratchet. the fixed part is provided with a first protruding part protruding towards the rotating part, and the rotating part is provided with a second protruding part protruding towards the fixed part, and the cable clamping channel is the gap between the first protruding part and the second protruding part.

5. The self-locking device for grounding wire of power overhaul according to claim 4, characterized in that, The opposite surfaces of the first and second protruding parts are provided with anti-skid structures.

6. The self-locking device for grounding wire of power overhaul according to any one of claims 1-2, 4-5, characterized in that, The conductive drainage assembly comprises a first conductive shell fixed on the fixed part, the first conductive shell covers the linkage unlocking assembly, and the grounding wire connecting port is detachably arranged on the first conductive shell. The outer periphery of the rotating part is fixed with a second conductive shell for covering the rotating part, and the fixed part is further fixed with a third conductive shell for covering the ratchet assembly.

7. An operating method of the grounding wire self-locking device according to any one of claims 1-6, characterized in that, The method comprises the following steps: S1. The grounding wire is installed on the grounding wire connecting port, and then the fixed part and the rotating part are erected on the cable; S2. The cable is clamped; The operating rod is pulled straight downward, the pawl is separated from the ratchet tooth groove, and is in an unlocked state; the rotating part rotates away from the fixed part, so that the cable enters the cable clamping channel, and the elastic force of the first reset spring drives the rotating part to close toward the fixed part, so that the fixed part and the rotating part clamp the cable; S3. The cable is loosened; The operating rod is vertically lifted upward, the pawl is separated from the ratchet tooth groove, and is in an unlocked state; the operating rod is continuously lifted upward, the cable is separated from the cable clamping channel, and after separation, the first reset spring drives the rotating part to rotate toward the fixed part to realize closing under the action of the elastic force of the first reset spring.

8. The method of operation of claim 7, wherein, Step S2 is specifically: when the operating rod is pulled straight downward, the linkage rod moves downward in a straight line, and under the cooperation of the triangular through hole, the pawl is driven to rotate clockwise with the engagement point of the pawl and the ratchet as the center of rotation, the pawl is separated from the ratchet tooth groove, and is in an unlocked state; The rotating part rotates away from the fixed part, so that the cable enters the cable clamping channel, and the elastic force of the first reset 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 is moved downward due to the downward movement of the linkage rod, so that the second reset spring is compressed, and after the cable is clamped by the fixed part and the rotating part, the operating rod is loosened, and the operating rod moves upward to the top end of the linkage rod under the action of the elastic force of the second reset spring. Restored to the locking point, at this time, the pawl and the ratchet are locked again, the rotating part cannot rotate, and the cable remains in a clamped state.

9. The method of operation of claim 8, wherein, Step S3 is specifically: when the operating rod is vertically lifted upward, the linkage rod moves upward in a straight line, and under the cooperation of the triangular through hole, the pawl is driven to rotate clockwise with the engagement point of the pawl and the ratchet as the center of rotation, the pawl is separated from the ratchet tooth groove, and is in an unlocked state; the operating rod is continuously lifted upward, the cable is separated from the cable clamping channel, and after separation, the first reset spring drives the rotating part to rotate toward the fixed part to realize closing under the action of the elastic force of the first reset spring. At the same time, the sliding block is moved upward due to the upward movement of the linkage rod, so that the second reset spring is compressed, and after the cable is separated from the cable clamping channel, the operating rod is loosened, and the operating rod moves downward to the top end of the linkage rod under the action of the elastic force of the second reset spring. Restored 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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