Adjustable grounding device for high and low voltage line operation

Abstract

The invention relates to the technical field of power equipment, in particular to an adjustable grounding device for high and low voltage line operation, which comprises a grounding rod body, the grounding rod body is provided with a hook, an elastic sheet is arranged on the inner side of the hook, and the elastic sheet is electrically connected with the hook and has a strip-shaped state and an annular state. And the elastic sheet is sleeved on the cable when being in an annular state, and is electrically connected with the cable. In the using process, the hook is arranged on the periphery of a cable in a sleeving mode, then the grounding rod body is driven to move downwards, the cable makes contact with the elastic piece, along with continuous movement of the grounding rod body, the cable will push the elastic piece, the elastic piece is switched from a strip-shaped state to an annular state and wraps the periphery of the cable, and therefore the cable is prevented from being damaged in the annular sleeving mode. The elastic sheet and the cable are in surface contact, so that the contact area between the elastic sheet and the cable can be increased, the contact resistance between the elastic sheet and the cable can be reduced, and the safety of power operation can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, in particular to an adjustable grounding device for high and low voltage line operations. Background Art

[0002] Ground rods play a crucial role in power system maintenance and repair. As a key piece of equipment for operational safety, their core function is to establish a reliable electrical connection between the cable and the ground. By safely directing current generated by potential electrical faults, such as leakage and lightning strikes, to the ground, they effectively prevent electric shock accidents and reduce the risk of equipment damage due to overvoltage.

[0003] In order to improve the stability and safety of the connection between the grounding rod and the cable, a variety of auxiliary safety devices have been developed in the relevant technical field. Among them, the auxiliary safety device for use with the grounding rod disclosed in Chinese patent application CN119674573A is quite representative. The core structure of the device includes a hook, and sliding grooves are provided on the two opposite inner walls of the hook. A spring and a limit head are inserted in each sliding groove. The two ends of the spring are respectively connected between the limit head and the inner wall of the hook, and the limit head is designed to be an arc shape. Its working principle is: when the hook is hung on the cable, the cable will push the limit heads on both sides to move into the sliding groove, thereby compressing the spring; under the action of the spring rebound force, the two limit heads can clamp and fix the cable, thereby realizing the connection between the grounding rod and the cable.

[0004] However, the above-mentioned auxiliary safety equipment for grounding rods also has some problems in actual use: since the cables used in the power system are mostly cylindrical in structure, and the limit heads are arc-shaped, the contact between the two is actually line contact. The characteristics of line contact directly lead to the actual contact area between the limit head and the cable being too small. A too small contact area will trigger a chain reaction: under certain conditions such as materials and pressure, the contact resistance between conductors is inversely proportional to the contact area, so a smaller contact area will significantly increase the contact resistance between the two. The increase in contact resistance will not only reduce the conductive efficiency of the grounding loop and affect the effective performance of the grounding protection function, but may also generate a lot of heat due to the Joule effect when a large current passes through, aggravating the oxidation and wear of the contact surface, further deteriorating the contact performance, and may even cause grounding failure, posing a potential threat to the safety of power operations. Summary of the Invention

[0005] Based on this, it is necessary to provide an adjustable grounding device for high and low voltage line operations to address the problem of poor safety performance of current grounding rods.

[0006] The above purpose is achieved through the following technical solutions:

[0007] An adjustable grounding device for high and low voltage line operations includes a grounding rod body, the grounding rod body having a hook, a spring sheet provided on the inner side of the hook, the spring sheet being electrically connected to the hook, the spring sheet having a strip state and a ring state, and when in the ring state, being sleeved on a cable and electrically connected to the cable.

[0008] Furthermore, the grounding rod body also has an insulating rod, which is fixedly connected to the hook; a mounting seat is further provided on the inner side of the hook, and the mounting seat is an inverted U-shaped structure; the spring plate is provided on the mounting seat and rotates synchronously with the mounting seat; the grounding rod body can rotate relative to the mounting seat around a first axis, and the first axis is parallel to the insulating rod; spring telescopic rods are provided on two inner side walls arranged opposite to each other on the mounting seat, and the spring telescopic rods and the spring plate are in the same plane and can slide along their own extension direction, and the telescopic ends of the two spring telescopic rods can respectively form a stop fit with the two ends of the spring plate; the adjustable grounding device for high and low voltage line operations also includes an adjustment mechanism, which is configured to unidirectionally and proportionally adjust the clamping force of the spring plate on the cable according to the vibration amplitude of the grounding rod body.

[0009] Furthermore, the adjustment mechanism includes a one-way component and two cams, the spring telescopic rod is connected to the mounting seat through the one-way component, and under the action of the one-way component, the spring telescopic rod can only move in the direction close to the spring piece; the two cams are respectively arranged on the mounting seat, and both can rotate around their own large end axes, and the small ends of the cams can form a stop fit with the fixed end of the spring telescopic rod; each of the cams is sleeved with a first ratchet ring, which can rotate around its own axis and form a one-way rotation fit with the cam and a friction rotation fit with the hook.

[0010] Furthermore, the one-way component includes a ratchet bar and a ratchet rod, and the ratchet bar is fixedly provided on the fixed end of each spring telescopic rod, and the ratchet bar is parallel to the spring telescopic rod; two ratchet rods are inserted in the mounting seat, and the ratchet rods can elastically slide in a direction perpendicular to the ratchet bar and can form a snap fit with the ratchet bar.

[0011] The guide sleeve is fixedly provided with a guide ring, and the guide ring is sleeved on the guide sleeve and can form a stop fit with the press sleeve and a guide fit with the press sleeve; a stop sleeve is also fixedly provided in the mounting seat, and the stop sleeve is sleeved on the guide sleeve and can form a stop fit with the press sleeve and a guide fit with the press sleeve; an elastic member is connected between the press sleeve and the base rod, and under the action of the elastic member, the press sleeve has a tendency to approach the guide sleeve.

[0012] Furthermore, the adjustable grounding device for high and low voltage line operations also includes a regulating component, which is configured to be able to adjust the degree of deformation of the elastic member in direct proportion to the clamping force of the spring clip on the cable.

[0013] Furthermore, the regulating assembly includes a second ratchet ring and a retaining ring, the second ratchet ring is arranged in the mounting seat and can rotate around its own axis and form a friction rotation fit with the hook, the second ratchet ring is simultaneously sleeved on the base rod and forms a one-way rotation fit with the base rod; the base rod can rotate around its own axis; the retaining ring is spirally sleeved on the base rod and forms a guide fit with the mounting seat, and the elastic member is connected between the retaining ring and the pressing sleeve.

[0014] Furthermore, the elastic member is a first compression spring.

[0015] Furthermore, two elastic seats are provided on the spring piece, and the elastic seats can form a stop fit with the telescopic end of the spring telescopic rod.

[0016] Furthermore, the elastic seat is made of rubber material.

[0017] The beneficial effects of the present invention are:

[0018] The present invention relates to an adjustable grounding device for high and low voltage line operations. By providing a spring piece and utilizing the elastic deformation property of the spring piece, the spring piece is deformed into a ring shape and sleeved on a cable during installation, so that there is surface contact between the spring piece and the cable. Compared with the existing line contact method, the device can increase the contact area between the two, reduce the contact resistance, and improve the connection stability, thereby facilitating the improvement of the safety of power operations.

[0019] Furthermore, by providing a mounting seat and a spring telescopic rod, and providing an adjustment mechanism that cooperates therewith, when the grounding rod body vibrates, the clamping force of the spring clip on the cable can be adjusted unidirectionally and proportionally according to the vibration amplitude of the grounding rod body, thereby further ensuring the stability of the connection between the spring clip and the cable.

[0020] Furthermore, by setting a base rod, a sliding frame and an elastic part, and setting a pressing sleeve, a guide sleeve and a stop sleeve that cooperate with them, during disassembly, the elastic potential energy accumulated in advance by the elastic part helps the spring piece switch from a ring state to a strip state, thereby reducing the force required to separate the spring piece and the cable, thereby reducing the labor intensity of the operator and improving the ease of operation.

[0021] Furthermore, by setting up a regulating component, the deformation degree of the elastic part can be adjusted in direct proportion to the clamping force of the spring clip on the cable. The greater the clamping force of the spring clip on the cable, the greater the elastic potential energy accumulated by the elastic part. During subsequent disassembly, the force required to separate the spring clip and the cable is smaller, thereby reducing the labor intensity of the operator and improving the ease of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention;

[0023] Figure 2 An exploded schematic diagram of the parts of an adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional view of an adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention;

[0025] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at Y in the middle;

[0026] Figure 5 A schematic cross-sectional view of an adjustable grounding device and a cable connected for high and low voltage line operation according to an embodiment of the present invention;

[0027] Figure 6 for Figure 5 Schematic diagram of the partially enlarged structure at Z in the middle;

[0028] Figure 7 A schematic diagram of the three-dimensional structure of a spring piece of an adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention;

[0029] Figure 8 A schematic front view of the structure of an adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention;

[0030] Figure 9 for Figure 8 Middle AA section view;

[0031] Figure 10 A schematic diagram of the three-dimensional structure of the assembly of the pressing sleeve, the guide sleeve and the retaining sleeve of the adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention;

[0032] Figure 11 A schematic diagram of the exploded parts of the pressure sleeve, guide sleeve and retaining sleeve of the adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention.

[0033] in:

[0034] 1. Grounding rod body; 101. Hook; 1011. First avoidance hole; 102. Insulating rod; 2. Spring clip; 201. Elastic seat; 202. Elastic deformation seat; 203. Insertion rod; 204. Insertion protrusion; 3. Mounting seat; 301. Connecting rod; 302. Slot; 303. Connecting slot; 304. Second avoidance hole; 305. Guide block; 306. Mounting slot; 4. Spring telescopic rod; 401. Fixed end; 402. Telescopic end; 403. First spring Spring; 501, cam; 502, first ratchet ring; 6, base rod; 7, pressure sleeve; 701, first guide protrusion; 8, sliding frame; 9, guide sleeve; 901, second guide protrusion; 902, sliding protrusion; 10, stop sleeve; 1001, first slide groove; 1002, third guide protrusion; 1003, fourth guide protrusion; 11, first compression spring; 12, regulating assembly; 1201, second ratchet ring; 1202, stop ring; 13, nut; 14, second spring; 15, cable. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] Refer to the following Figures 1 to 11 The adjustable grounding device for high and low voltage line operations provided by an embodiment of the present invention is described below. The adjustable grounding device is particularly suitable for grounding work during high and low voltage line operations.

[0039] Specifically, the adjustable grounding device for high- and low-voltage line operations includes a grounding rod body 1 having a fixedly connected hook 101 and an insulating rod 102. The hook 101 is used to hang on the cable 15, and the insulating rod 102 is used to facilitate gripping by the operator. A clamp is provided inside the hook 101, which is used to clamp the cable 15 when the hook 101 is hung on the cable 15, thereby firmly connecting the grounding rod body 1 to the cable 15. The contact surface between the existing clamp and the cable 15 is typically designed as an arc surface. However, most cables 15 used in power systems have a standard cylindrical structure. From a geometric perspective, when the arc surface and the cylindrical surface come into contact, the contact area between the two is only a straight line (i.e., the intersection of the two curved surfaces), forming a typical line contact. Based on the physical contact principle, the nature of line contact dictates that the actual effective contact area between the clamp and the cable 15 is extremely small. According to contact resistance theory in electromagnetics, the resistance of a conductor's contact surface is composed of two components: contraction resistance and surface film resistance. Contraction resistance arises from the contraction of current flow at the contact surface, and its magnitude is inversely proportional to the contact area. Surface film resistance, formed by insulating materials such as the oxide layer and dirt on the contact surface, also increases as the effective contact area decreases. Therefore, under fixed conditions such as contact material and clamping pressure, the small contact area caused by line contact can significantly increase the total contact resistance.

[0040] An increase in contact resistance triggers a series of chain reactions. From a circuit conduction perspective, the total resistance of the grounding loop is composed of the resistance of the grounding rod 1, the contact resistance, and the earth resistance. A surge in contact resistance will directly cause the total grounding loop resistance to exceed the safety threshold, reducing the efficiency of discharging leakage and lightning currents and weakening the reliability of the grounding protection function. From an energy conversion perspective, according to the Joule-Lenz law, heat is generated when current passes through a resistor (Q = I²Rt). When a large fault current (such as a lightning current of up to tens of kiloamperes) passes through, a large amount of heat will be instantly generated at the contact resistance, causing the contact surface temperature to rise sharply. High temperature will accelerate the oxidation reaction of the metal on the contact surface, forming a thicker oxide layer, further increasing the contact resistance. It may also cause the elasticity of the clamping parts to fail and reduce the clamping force. Over a long period of circulation, the contact performance will continue to deteriorate, eventually causing the grounding loop to be interrupted, and the equipotential connection between the live parts of cable 15 and the earth to fail. This poses a direct risk of electric shock to power workers and a potential overvoltage damage to equipment.

[0041] Based on this, in the adjustable grounding device for high and low voltage line operations provided in the embodiment of the present invention, the clamping member is configured as a spring clip 2, and the spring clip 2 is electrically connected to the hook 101. The spring clip 2 has a strip state and a ring state. When the spring clip 2 is in the ring state, it is sleeved on the cable 15 and electrically connected to the cable 15, ensuring that the current on the cable 15 can be stably transmitted to the ground through the conductive path formed by the spring clip 2 and the hook 101. The electrical continuity of this process is guaranteed by the electrical connection between the spring clip 2 and the hook 101. From the perspective of contact form, the spring clip 2 forms a surface contact with the cylindrical cable 15 in the ring state, and its principle advantages are reflected in the following aspects:

[0042] From the perspective of electrical principles, surface contact directly reduces contact resistance by expanding the effective contact area between conductors. According to the composition mechanism of contact resistance, contact resistance is composed of the contraction resistance caused by the contraction of current streamlines and the surface film resistance formed by the oxide layer on the contact surface, both of which are inversely proportional to the contact area. Compared with line contact, surface contact significantly increases the number of effective paths for current conduction, reduces the contraction effect of current on the contact surface, and disperses the influence of the surface film, thereby significantly reducing the total contact resistance. This change can improve the conductive efficiency of the grounding loop, ensuring that fault currents such as leakage and lightning strikes can be quickly introduced into the earth through the grounding device, avoiding delayed or incomplete current discharge due to excessive resistance, thereby ensuring the reliable performance of the grounding protection function.

[0043] From the perspective of mechanical stability, surface contact makes the contact area between the shrapnel 2 and the cable 15 in a ring-shaped wrapped state, and the contact points are more evenly distributed. According to the friction formula (f=μN), when the clamping force (N) is constant, surface contact increases the actual range of action of the friction coefficient (μ), thereby improving the overall static friction. This structure can effectively resist external interference such as vibration and wind of the cable 15, reduce the relative displacement between the shrapnel 2 and the cable 15, and avoid instantaneous resistance mutations or conductive interruptions caused by poor contact. At the same time, the uniform contact pressure distribution can reduce local stress concentration, reduce the plastic deformation of the shrapnel 2 caused by long-term uneven force, extend the effective service life of the equipment, and indirectly ensure the structural stability during power operations.

[0044] Therefore, through the surface contact between the spring piece 2 and the cable 15, the inherent defects of line contact are solved in two dimensions: electrical conduction efficiency and mechanical connection stability, providing double protection for the safety of power operations.

[0045] Initially, the spring piece 2 is in a strip-shaped state and is perpendicular to the insulating rod 102. The cross-sectional shape of the spring piece 2 is arc-shaped, and the inner arc surface is set upward to ensure that when the spring piece 2 becomes annular, its circumferential side wall is a circular surface, so that it can achieve a close fit with the cable 15 and ensure the contact area between the two; an elastic deformation seat 202 is fixed to the top middle part of the spring piece 2, and the elastic deformation seat 202 is also fixed to the inner middle part of the hook 101. When the spring piece 2 is deformed, the elastic deformation seat 202 can ensure the state switching of the spring piece 2 through its own elastic deformation; a first avoidance hole 1011 is opened through the two opposite inner walls of the hook 101, and the two ends of the spring piece 2 extend into the two first avoidance holes 1011 respectively to avoid interference with the hook 101 during deformation.

[0046] It is understandable that the material of the shrapnel 2 can be set to any one of beryllium bronze alloy (QBe2), titanium alloy (TC4), 65Mn spring steel, etc.

[0047] In other embodiments, after the operator attaches the ground rod body 1 to the cable 15, it is in a non-rigidly fixed, freely suspended state. At this point, external environmental disturbances (such as wind loads, ground vibration wave transmission, and the instantaneous impact of birds landing on the cable 15) can trigger a chain reaction through the following mechanical conduction pathways: Based on the principle of vibration conduction, the cable 15, as a slender, flexible component, has a low natural frequency and is susceptible to lateral or axial vibration under external excitation. When the cable 15 vibrates, the vibration energy is transferred to the spring clip 2 through the surface contact friction between the spring clip 2 and the cable 15. This energy is then transmitted to the entire ground rod body 1 via rigid connection components such as the mounting base 3 and the hook 101, causing the ground rod body 1 to oscillate at the same or different frequencies as the cable 15 vibrates. This can easily cause the ground rod body 1 and the cable 15 to separate, compromising safety.

[0048] Based on this, in the adjustable grounding device for high and low voltage line operations provided in an embodiment of the present invention, it is configured to also include a mounting seat 3, which is an inverted U-shaped structure and is located on the inner side of the hook 101 during installation. The outer wall of the mounting seat 3 and the inner wall of the hook 101 are overlapped, and a connecting rod 301 is fixedly provided on the top of the outer wall of the mounting seat 3. The connecting rod 301 passes through the hook 101 upward during installation, and a nut 13 is threadedly sleeved on the connecting rod 301. The nut 13 is also stopped on the outer wall of the hook 101, so that the mounting seat 3 can be connected to the hook 101; a slot 302 is jointly provided at the top of the inner wall of the mounting seat 3 and the connecting rod 301, and the slot 302 and the insulating rod 102 are arranged parallel to each other, and an insertion rod 203 is fixedly provided on the elastic deformation seat 202, and the insertion rod 203 is inserted into the slot 302 during installation. , a connecting groove 303 is opened on the side wall of the slot 302, and an inserting protrusion 204 is fixedly provided on the side wall of the inserting rod 203. The inserting protrusion 204 is inserted into the slot 302 during installation, so that the spring piece 2 can rotate synchronously with the mounting seat 3. When the cable 15 vibrates, since the cable 15, the spring piece 2 and the mounting seat 3 are an integrated structure, the cable 15 drives the spring piece 2 and the mounting seat 3 to vibrate together; the connecting rod 301 is a round rod structure, and the outer side wall of the mounting seat 3 and the inner side wall of the hook 101 are both set as curved surfaces, so that the grounding rod body 1 can rotate around the first axis, and the first axis coincides with the axis of the connecting rod 301. Since the hook 101 is free relative to the mounting seat 3 and has the freedom to rotate around the connecting rod 301, when the cable 15 vibrates, the hook 101 will rotate around the connecting rod 301 relative to the mounting seat 3. Second avoidance holes 304 are respectively opened on the two opposite inner side walls of the mounting base 3. The second avoidance holes 304 and the first avoidance holes 1011 are correspondingly arranged. The two ends of the spring piece 2 extend into the two second avoidance holes 304 respectively to avoid interference with the mounting base 3 during deformation.

[0049] A guide block 305 is fixed to the two opposite inner side walls of the mounting seat 3 by bolts. The guide block 305 is arranged close to the second avoidance hole 304, and the two guide blocks 305 are symmetrically arranged about the connecting rod 301; a spring telescopic rod 4 is arranged in each second avoidance hole 304, and the spring telescopic rod 4 is arranged at the bottom of the second avoidance hole 304 and is arranged vertically with the insulating rod 102. The two spring telescopic rods 4 are symmetrically arranged about the connecting rod 301 to ensure that they are in the same plane with the spring piece 2; the spring telescopic rod 4 has a fixed end 401, a telescopic end 402 and a first spring 403, wherein the telescopic end 402 is sleeved during installation. Connected to the fixed end 401 and pointing to the spring piece 2, the first spring 403 is inserted in the fixed end 401 and connected between the fixed end 401 and the telescopic end 402. The fixed end 401 is vertical and slides through the guide block 305 to ensure that the spring telescopic rod 4 can slide along its own extension direction, so that the telescopic end 402 can form a stop fit with the spring piece 2. While compressing the first spring 403, under the action of the rebound force of the first spring 403, the two telescopic ends 402 approach each other and further clamp the cable 15 through the spring piece 2, thereby further ensuring the stability of the connection between the spring piece 2 and the cable 15.

[0050] The adjustable grounding device for high and low voltage line operation is configured to further include an adjustment mechanism, which includes a one-way component and two cams 501, wherein the spring telescopic rod 4 is connected to the mounting seat 3 through the one-way component, and under the action of the one-way component, the spring telescopic rod 4 can only move in the direction close to the spring piece 2, so that the clamping force of the spring piece 2 on the cable 15 can be adjusted unidirectionally and proportionally according to the vibration amplitude of the grounding rod body 1; the cam 501 is a structure with one end large and the other end small. When installed, the two cams 501 are respectively located in the two second avoidance holes 304, and both are rotatably inserted into the bottom of the second mounting hole through the large end, and It forms a friction fit with the mounting seat 3, and the small end of the cam 501 can form a stop fit with the fixed end 401 of the spring telescopic rod 4; a first ratchet ring 502 is sleeved on the large end of each cam 501, and the first ratchet ring 502 can rotate around its own axis. A plurality of first ratchet teeth are provided on the inner peripheral wall of the first ratchet ring 502, and a plurality of second ratchet teeth are provided on the outer peripheral wall of the large end of the cam 501. The second ratchet teeth and the first ratchet teeth form a snap fit, so that the first ratchet ring 502 and the cam 501 form a one-way rotation fit, and the outer peripheral wall of the first ratchet ring 502 is in friction contact with the inner side wall of the hook 101 at the same time.

[0051] During use, the operator first puts the hook 101 on the outer periphery of the cable 15, and then drives the grounding rod body 1 to move downward so that the cable 15 and the spring piece 2 come into contact; as the grounding rod body 1 continues to move downward, the cable 15 will push the spring piece 2, causing the spring piece 2 to switch from a strip state to a ring state and wrap around the outer periphery of the cable 15; at this time, the cable 15, the spring piece 2 and the mounting base 3 are an integrated structure.

[0052] When the cable 15 vibrates, the spring piece 2 and the mounting base 3 are synchronously driven to vibrate together. Since the hook 101 is free relative to the mounting base 3 and has the freedom to rotate around the connecting rod 301, the hook 101 will rotate relative to the mounting base 3. During the forward rotation of the hook 101, the hook 101 drives the first ratchet ring 502 to rotate through the friction cooperation between the hook 101 and the first ratchet ring 502, and the first ratchet ring 502 synchronously drives the cam 501 to rotate around its own large end through the snap cooperation between the first ratchet and the second ratchet, and the cam 501 then forms a stop cooperation with the fixed end 401 through its own small end; as the cam 501 continues to rotate, it pushes the fixed end 401 to move in the direction close to the spring piece 2, and the fixed end 401 synchronously drives the telescopic end 402 to move through the first spring 403; when the telescopic end 402 contacts the spring piece 2, as the fixed end 401 continues to move, the first spring 403 is further compressed, and under the action of the rebound force of the first spring 403, the two telescopic ends 402 approach each other and further clamp the cable 15 through the spring piece 2. Moreover, the greater the vibration amplitude of the cable 15, the greater the rotation angle of the hook 101 relative to the mounting base 3, the greater the rotation angle of the first ratchet ring 502 and the cam 501, the farther the fixed end 401 moves, and the greater the compression of the first spring 403, so that the clamping force of the spring piece 2 on the cable 15 is greater, ensuring the stability of the connection between the spring piece 2 and the cable 15.

[0053] During the reverse rotation of the hook 101 , the spring telescopic rod 4 remains in place under the action of the one-way assembly; the cam 501 remains stationary due to the friction between its large end and the mounting seat 3 , and the first ratchet ring 502 rotates in the reverse direction normally.

[0054] Furthermore, the one-way component is configured to include a ratchet bar and a ratchet rod. A ratchet bar is fixedly provided on the fixed end 401 of each spring telescopic rod 4. The ratchet bar and the spring telescopic rod 4 are parallel and are located in the guide block 305 at the same time. A ratchet rod is inserted on each guide block 305. The ratchet rod is parallel to the insulating rod 102 and forms a snap fit with the ratchet bar at the same time, and is connected to the guide block 305 through a second compression spring. Under the action of the second compression spring, the ratchet rod has a tendency to clamp with the ratchet bar, thereby ensuring that the spring telescopic rod 4 can only move in the direction close to the spring piece 2.

[0055] During the reset process, the ratchet rod is manually pulled away from the ratchet bar, and the second compression spring is synchronously compressed, so that the ratchet rod and the ratchet bar are disengaged, and then the spring telescopic rod 4 is manually reset; then the ratchet rod is released, and the second compression spring drives the ratchet rod close to the ratchet bar and re-engages with the ratchet bar to avoid affecting the next use.

[0056] In other embodiments, there are multiple connecting grooves 303 and they are arranged circumferentially, there are multiple inserting protrusions 204 and they are arranged circumferentially and are plugged into the corresponding connecting grooves 303, thereby improving the connection stability between the mounting base 3 and the spring clip 2.

[0057] In other embodiments, in order to improve the effort-saving when disassembling the adjustable grounding device for high and low voltage line operations, it is set that the slot 302 and the insertion rod 203 are both columnar structures, and the slot 302 and the connecting rod 301 are coaxially arranged, the connecting groove 303 is a strip structure, and is parallel to the axis of the slot 302, and penetrates downwardly through the inner side wall of the mounting seat 3; the insertion protrusion 204 is a strip structure, and is parallel to the axis of the insertion rod 203. The insertion protrusion 204 is slidably inserted into the slot 302 during installation, so that the spring piece 2 can rotate synchronously with the mounting seat 3 and can slide axially relative to it. A second spring 14 is also inserted in the slot 302, and the second spring 14 is connected between the connecting rod 301 and the insertion rod 203. Under the action of the second spring 14, the mounting seat 3 can slide elastically axially relative to the spring piece 2. A mounting groove 306 is provided in the mounting seat 3, and the mounting groove 306 is located below the second mounting hole on the left side and passes through the mounting groove 306 downward, and a base rod 6 is inserted in the mounting groove 306; a pressing sleeve 7 is rotatably sleeved on the base rod 6, and a plurality of first guide protrusions 701 are evenly distributed circumferentially on the top outer peripheral wall of the pressing sleeve 7, and the bottom surface of the first guide protrusion 701 is an inclined surface; an elastic member is also inserted in the mounting groove 306, and the elastic member can be set as a first compression spring 11, which is simultaneously sleeved on the base rod 6 and connected between the base rod 6 and the pressing sleeve 7. Under the action of the first compression spring 11, the pressing sleeve 7 has a tendency to move downward.

[0058] A sliding frame 8 is sleeved on the mounting seat 3. The sliding frame 8 is a U-shaped frame structure with an opening facing downward. The sliding frame 8 can slide in a direction parallel to the insulating rod 102 and can form a stop fit with the cable 15; a guide sleeve 9 is fixedly provided on the sliding frame 8. The guide sleeve 9 is inserted into the mounting groove 306 during installation and is simultaneously sleeved on the pressing sleeve 7. A plurality of second guide protrusions 901 are evenly arranged circumferentially on the top of the guide sleeve 9. The second guide protrusions 901 are a triangular structure with the tip facing upward. The number of second guide protrusions 901 is twice that of the first guide protrusions 701. The triangular side wall of the second guide protrusion 901 contacts the bottom surface of the first guide protrusion 701 and forms a stop fit. A plurality of sliding protrusions 902 are evenly arranged circumferentially on the top outer peripheral wall of the guide sleeve 9, and the sliding protrusions 902 and the second guide protrusions 901 are correspondingly arranged.

[0059] The retaining sleeve 10 is coaxially and fixedly inserted in the mounting groove 306, and a plurality of first sliding grooves 1001 are opened on the circumferential side wall of the retaining sleeve 10. The plurality of first sliding grooves 1001 are evenly arranged along the circumferential direction, and the number is equal to the number of the first guide protrusions 701. The first sliding grooves 1001 are strip-shaped structures and are parallel to the axis of the retaining sleeve 10. The first sliding grooves 1001 simultaneously penetrate the top of the retaining sleeve 10 upward, and a plurality of third guide protrusions 1002 are fixedly provided on the top of the retaining sleeve 10. The plurality of third guide protrusions 1002 are evenly arranged along the circumferential direction, and are staggered with the first sliding grooves 1001 along the circumferential direction. The top of the third guide protrusion 1002 is an inclined surface, and the inclination direction is the same as that of the first guide protrusion 701. 01, a plurality of fourth guide protrusions 1003 are fixedly provided on the top of the stopper sleeve 10. The plurality of fourth guide protrusions 1003 are evenly arranged along the circumference and staggered along the circumference with the first chute 1001. The fourth guide protrusions 1003 are arranged closely to the third guide protrusions 1002. The top of the fourth guide protrusion 1003 is an inclined surface, and the inclined direction is the same as the inclined direction of the bottom inclined surface of the first guide protrusion 701. Initially, the sliding protrusion 902 is slidably inserted into the first chute 1001, and the first guide protrusion 701 is inserted between the third guide protrusion 1002 and the fourth guide protrusion 1003, and simultaneously forms a stopper with the third guide protrusion 1002 and the fourth guide protrusion 1003. The first guide protrusion 701 can be slidably inserted into the first chute 1001 and can also form a stopper with the sliding protrusion 902.

[0060] During the disassembly process, the operator first holds the insulating rod 102 and then pulls the insulating rod 102 downward; at this time, since the cable 15 and the spring 2 are an integrated structure, the spring 2 remains stationary, and the insulating rod 102 synchronously drives the hook 101, the mounting seat 3 and the sliding frame 8 to move downward, while compressing the second spring 14. When the sliding frame 8 and the cable 15 come into contact, the sliding frame 8 remains stationary under the support of the cable 15. As the hook 101 and the mounting seat 3 continue to move downward, the guide sleeve 9 moves upward relative to the mounting seat 3 and is inserted into the mounting groove 306 inwardly. The second guide protrusion 901 drives the pressing sleeve 7 to move upward by cooperating with the stopper between the second guide protrusion 701 and the first guide protrusion 701. At the same time, the sliding protrusion 902 slides upward along the first sliding groove 1001, and the first compression spring 11 is compressed. When the first guide protrusion 701 moves to the point where it just disengages from the fourth guide protrusion 1003, the triangular side wall surface on one side of the second guide protrusion 901 and the top inclined surface of the fourth guide protrusion 1003 are approximately coincident. At this time, the bottom inclined surface of the first guide protrusion 701 is simultaneously aligned with the triangular side wall surface on one side of the second guide protrusion 901 and the first inclined surface of the fourth guide protrusion 1003. The top inclined surfaces of the four guide protrusions 1003 form a guiding fit; then, under the push of the first compression spring 11, the pressing sleeve 7 rotates, and then rotates until the first guide protrusion 701 is inserted into the first slide groove 1001, and then slides downward along the first slide groove 1001 to form a stop fit with the sliding protrusion 902. At this time, under the action of the first compression spring 11, the sliding frame 8 has a tendency to drive the cable 15 to move downward, so that the cable 15 has a tendency to separate from the spring piece 2; then the insulating rod 102 is pulled upward. At this time, under the joint auxiliary action of the first compression spring 11 and the second spring 14, the spring piece 2 is helped to switch from a ring state to a strip state, reducing the force required to separate the spring piece 2 and the cable 15, while reducing the labor intensity of the operator and improving the ease of operation.

[0061] In a further embodiment, when the vibration amplitude of the cable 15 increases, the angle of rotation of the hook 101 relative to the mounting base 3 increases, causing the spring telescopic rod 4 to move inward a greater distance, thereby increasing the clamping force of the spring clip 2 on the cable 15. To ensure that the external force required to separate the spring clip 2 and the cable 15 is relatively small, the adjustable grounding device configured for high and low voltage line operation further includes a regulating assembly 12. The regulating assembly 12 is configured to adjust the degree of deformation of the elastic member in direct proportion to the clamping force of the spring clip 2 on the cable 15. In this way, the greater the clamping force of the spring clip 2 on the cable 15, the greater the elastic potential energy accumulated in the elastic member. During subsequent disassembly, the external force required to separate the spring clip 2 and the cable 15 is relatively small, thereby reducing the operator's labor intensity and improving operational simplicity.

[0062] Specifically, the base rod 6 is rotatably arranged on the mounting seat 3; the regulating assembly 12 is configured to include a second ratchet ring 1201 and a retaining ring 1202, the second ratchet ring 1201 is inserted into the mounting groove 306, and can rotate around its own axis, a plurality of third ratchet teeth are provided on the inner peripheral wall of the second ratchet ring 1201, and a plurality of fourth ratchet teeth are provided on the outer peripheral wall of the base rod 6, the fourth ratchet teeth and the third ratchet teeth form a snap fit, so that the second ratchet ring 1201 and the base rod 6 form a one-way rotation fit The outer peripheral wall of the second ratchet ring 1201 is in frictional contact with the inner wall of the hook 101 at the same time; the retaining ring 1202 is spirally sleeved on the base rod 6, and a slide bar is provided on the inner peripheral wall of the mounting groove 306. The slide bar is parallel to the axis of the mounting groove 306, and a second slide groove is provided on the outer peripheral wall of the retaining ring 1202. When the second slide groove is slidably sleeved on the slide bar during installation, the retaining ring 1202 can slide axially relative to the mounting groove 306; the first compression spring 11 is connected between the retaining ring 1202 and the pressing sleeve 7.

[0063] When the hook 101 rotates around the connecting rod 301 relative to the mounting base 3, the hook 101 drives the second ratchet ring 1201 to rotate through the friction between the hook 101 and the second ratchet ring 1201, and the second ratchet ring 1201 synchronously drives the base rod 6 to rotate through the snap fit between the third ratchet and the fourth ratchet. The base rod 6 drives the retaining ring 1202 downward through the spiral fit between the base rod 6 and the retaining ring 1202 under the limit fit between the slide bar and the second slide groove, and synchronously compresses the first compression spring 11, ensuring that the greater the elastic potential energy accumulated by the first compression spring 11. During subsequent disassembly, the greater the elastic potential energy accumulated by the first compression spring 11, the more it can share the separation resistance between the shrapnel 2 and the cable 15, thereby ensuring that the external force required to separate the shrapnel 2 and the cable 15 is small, while reducing the labor intensity of the operator and improving the ease of operation.

[0064] In order to realize the reset of the retaining ring 1202, the bottom end of the base rod 6 can be set to pass through the sliding frame 8. After the disassembly is completed, the base rod 6 is manually rotated, the second ratchet ring 1201 is kept stationary by the friction between the mounting seat 3, the fourth ratchet and the third ratchet are disengaged, the base rod 6 is screwed with the retaining ring 1202, and the retaining ring 1202 is driven to move upward by the limited cooperation between the slide bar and the second slide groove, and the first compression spring 11 is released synchronously to realize the reset, so as to avoid affecting the next use.

[0065] In other embodiments, the slot 302 and the insertion rod 203 can also be set to be square structures to replace the functions of the connecting groove 303 and the insertion protrusion 204, so as to ensure that the spring piece 2 can rotate synchronously with the mounting seat 3 and slide relatively axially within the geometric shape restriction of the square.

[0066] In other embodiments, to improve the contact stability between the telescopic end 402 and the spring 2 when the first spring 403 is compressed, two elastic seats 201 are fixedly disposed on the top of the spring 2. The two elastic seats 201 are located at either end of the spring 2 and can respectively form a stop with the telescopic end 402. In this way, when the telescopic end 402 contacts the elastic seats 201 and pressure is applied, the elastic seats 201 will adaptively deform in response to the pressure. This deformation can fill any microscopic gaps that may exist between the telescopic end 402 and the spring 2, expanding the contact interface between the two from point or line contact to a wider surface contact, thereby increasing the effective contact area. The larger contact area can also ensure more uniform pressure distribution, avoiding deformation or wear at the contact point caused by local stress concentration. At the same time, the elastic restoring force of the first spring 403 can continuously form a stable reaction force on the telescopic end 402. Even under dynamic conditions such as vibration, it can absorb some of the impact energy through its own deformation, reducing the relative displacement between the telescopic end 402 and the spring 2 and maintaining the consistency of the contact state.

[0067] It is understandable that the elastic seat 201 can be made of rubber material, thereby ensuring that the elastic seat 201 has elasticity and a large friction coefficient, thereby improving the stability of the telescopic end 402 and the elastic seat 201 when in contact.

[0068] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and modifications are possible without departing from the scope of the present invention, and such variations and modifications are fully within the scope of protection of the present invention.

Claims

1. An adjustable grounding device for high and low voltage line operations, characterized in that: The adjustable grounding device for high and low voltage line operations includes a grounding rod body, the grounding rod body has a hook, a spring piece is provided on the inside of the hook, the spring piece is electrically connected to the hook, the spring piece has a bar state and a ring state, and when in the ring state, it is sleeved on the cable and electrically connected to the cable.

2. The adjustable grounding device for high and low voltage line operation according to claim 1, characterized in that: The grounding rod body further comprises an insulating rod, which is fixedly connected to the hook; a mounting seat is further provided on the inner side of the hook, and the mounting seat has an inverted U-shaped structure; the spring clip is disposed on the mounting seat and rotates synchronously with the mounting seat; the grounding rod body is capable of rotating relative to the mounting seat about a first axis, which is parallel to the insulating rod; spring telescopic rods are provided on two opposing inner side walls of the mounting seat, the spring telescopic rods and the spring clip being coplanar and capable of sliding along their own extension direction, with the telescopic ends of the two spring telescopic rods being capable of forming a stop fit with the ends of the spring clip, respectively; the adjustable grounding device for high and low voltage line operations further comprises an adjustment mechanism, which is configured to unidirectionally and proportionally adjust the clamping force of the spring clip on the cable according to the vibration amplitude of the grounding rod body.

3. The adjustable grounding device for high and low voltage line operation according to claim 2, characterized in that: The adjustment mechanism includes a one-way component and two cams. The spring telescopic rod is connected to the mounting seat through the one-way component, and under the action of the one-way component, the spring telescopic rod can only move in the direction close to the elastic piece; the two cams are respectively arranged on the mounting seat, and both can rotate around their own large end axes, and the small ends of the cams can form a stop fit with the fixed end of the spring telescopic rod; each of the cams is sleeved with a first ratchet ring, which can rotate around its own axis and form a one-way rotation fit with the cam and a friction rotation fit with the hook.

4. The adjustable grounding device for high and low voltage line operations according to claim 3, characterized in that: The one-way assembly includes a ratchet bar and a ratchet rod. The ratchet bar is fixedly provided on the fixed end of each spring telescopic rod, and the ratchet bar is parallel to the spring telescopic rod. Two ratchet rods are inserted in the mounting seat, and the ratchet rods can elastically slide in a direction perpendicular to the ratchet bar and can form a snap fit with the ratchet bar.

5. The adjustable grounding device for high and low voltage line operation according to claim 2, characterized in that: The guide sleeve is fixedly provided with a guide ring, and the guide ring is sleeved on the guide sleeve and can form a stop cooperation with the press sleeve and can form a guide cooperation with the press sleeve; a stop sleeve is also fixedly provided in the mounting seat, and the stop sleeve is sleeved on the guide sleeve and can form a stop cooperation with the press sleeve and can form a guide cooperation with the press sleeve; an elastic member is connected between the press sleeve and the base rod, and under the action of the elastic member, the press sleeve has a tendency to approach the guide sleeve.

6. The adjustable grounding device for high and low voltage line operations according to claim 5, characterized in that: The adjustable grounding device for high and low voltage line operations further includes a regulating component, which is configured to be able to adjust the degree of deformation of the elastic member in direct proportion to the clamping force of the spring sheet on the cable.

7. The adjustable grounding device for high and low voltage line operations according to claim 6, characterized in that: The regulating assembly includes a second ratchet ring and a retaining ring. The second ratchet ring is arranged in the mounting seat and can rotate around its own axis and form a friction rotation fit with the hook. The second ratchet ring is simultaneously sleeved on the base rod and forms a one-way rotation fit with the base rod; the base rod can rotate around its own axis; the retaining ring is spirally sleeved on the base rod and forms a guiding fit with the mounting seat, and the elastic member is connected between the retaining ring and the pressing sleeve.

8. The adjustable grounding device for high and low voltage line operations according to claim 5, characterized in that: The elastic member is a first compression spring.

9. The adjustable grounding device for high and low voltage line operations according to claim 2, characterized in that: Two elastic seats are provided on the spring piece, and the elastic seats can form a stop fit with the telescopic end of the spring telescopic rod.

10. The adjustable grounding device for high and low voltage line operations according to claim 9, characterized in that: The elastic seat is made of rubber material.

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