A telescopic grounding device for electric power operation

Abstract

This invention provides a telescopic grounding device for power operations, relating to the field of power equipment technology. It includes a telescopic outer cylinder and an inner rod. The outer cylinder has a handheld end and a working end, respectively. The working end is equipped with a hook and a clamping assembly. The hook is used to connect to a power transmission line. The inner rod is detachable and coaxially inserted into the outer cylinder. A grounding ring is provided on the power transmission line, and the clamping assembly can clamp or release the grounding ring. Because the outer cylinder is lightweight and does not easily sway, the position of the working end of the outer cylinder is easily controlled. First, the hook is connected to the power transmission line, at which point the power transmission line bears the weight of the outer cylinder. The grounding wire is then connected to the inner rod. Next, the inner rod is inserted into the outer cylinder and electrically connected to the clamping assembly, which clamps the grounding ring, thus completing the grounding connection operation. By separating the lighter outer cylinder from the heavier grounding wire, it is easier for operators to quickly and accurately connect the clamping assembly to the grounding ring, simplifying operation and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a retractable grounding device for power operations. Background Technology

[0002] In the inspection, maintenance, and operation of power facilities, reliable temporary grounding devices are often used to ensure the safety of workers and protect equipment. This discharges any residual charge or induced current that may exist in the lines, preventing electric shock accidents. Grounding rods are commonly used tools in this type of device. Existing grounding rods mainly include high-altitude and ground-based types. High-altitude grounding rods are usually shorter. Workers climb to a high working position, such as a transmission tower, before performing the grounding operation. That is, the worker must hold the short grounding rod at a height and connect and secure the connector (such as a hook or clamp) at its end to the grounding ring pre-installed on the transmission line. Ground-based grounding rods mainly consist of a retractable insulated operating rod and a grounding hook at the front end of the rod. Workers stand on the ground and operate the insulated rod to attach the grounding hook to the grounding ring, thus achieving the grounding connection operation without climbing.

[0003] Existing ground-operated grounding rods are long, especially the grounding wire, which is long and heavy. This makes it difficult to control the position of the top of the grounding rod, and operators cannot quickly and accurately connect the grounding hook to the grounding ring. The operation is inconvenient and the work efficiency is low.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide a telescopic grounding device for power operations to address the problems existing in current ground-operated grounding rods.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A telescopic grounding device for power operations includes a telescopic outer cylinder and an inner rod. The outer cylinder has a handheld end and a working end at its two ends, respectively. The working end is provided with a hook and a clamping assembly. The hook is used to attach to a power transmission line. The inner rod is detachable and coaxially inserted into the outer cylinder, so that one end of the inner rod can be electrically connected to the clamping assembly. A grounding wire is detachably connected to the inner rod. A grounding ring is provided on the power transmission line. The clamping assembly can clamp or release the grounding ring.

[0008] Furthermore, a push rod is slidably provided inside the outer cylinder along its axial direction. Side cylinders and connecting rods are provided on both sides of the outer cylinder. A clamping assembly is provided at one end of the side cylinder, and the other end of the side cylinder is hinged to the push rod. One end of the connecting rod is hinged to the working end, and the other end of the connecting rod is hinged to the middle of the side cylinder. The length of the connecting rod is equal to half the length of the side cylinder.

[0009] Furthermore, a retaining ring is formed on the push rod. When a first external force is applied to the inner rod, the inner rod can slide along the axial direction of the outer cylinder, and the retaining ring drives the push rod to slide along the axial direction of the outer cylinder.

[0010] Furthermore, the clamping assembly includes two opposing clamps, each clamp having a first end and a second end. The first end is hinged to the outer cylinder or the side cylinder. The second ends of the two clamps are either far apart from each other or tend to be far apart from each other. When a second external force is applied to the inner rod, the second ends of the two clamps move closer to each other to clamp the grounding ring.

[0011] Furthermore, a swing rod is fixed to the first end, the swing rod is set at an angle to the clamp, and an elongated hole is opened on the swing rod along its length direction. A first pull rod is slidably provided inside the outer cylinder and the side cylinder. A locking pin is provided on the first pull rod. The locking pin slides along the elongated hole. When the second external force is applied to the inner rod, the first pull rod slides along the outer cylinder or the side cylinder.

[0012] Furthermore, the first pull rod has a square cross-section, the side of the swing arm is a plane, and the side of the first pull rod fits against the side of the swing arm.

[0013] Furthermore, a first through hole is provided inside the push rod along the axial direction of the outer cylinder, and a second pull rod is slidably provided in the first through hole. A pull rope is provided between the first pull rod and the second pull rod. The second pull rod can be connected to the inner rod by a thread. When the second external force is applied to the inner rod, the inner rod rotates circumferentially along the outer cylinder.

[0014] Furthermore, the handheld end is open and rotatably equipped with an end cap. The end cap has a second through hole along the axial direction of the outer cylinder. The inner rod passes through the second through hole. The end cap has a threaded hole along the radial direction of the outer cylinder. A locking bolt is provided in the threaded hole. When the locking bolt is tightened, its end can abut against the inner rod to restrict the inner rod from sliding along the axial direction of the outer cylinder.

[0015] Furthermore, each of the two clamps has a groove on the side where they are close to each other. When the two clamps clamp the grounding ring, the groove is used to limit the grounding ring.

[0016] Furthermore, the hook has a hooking inlet, and the power transmission line enters the hook through the hooking inlet so that the hook can be hooked with the power transmission line; two hooks are centrally symmetrically arranged about the axis of the outer cylinder, and the hooking inlets of the two hooks face opposite directions. When the clamping assembly clamps the grounding ring, the two hooks are arranged sequentially along the length of the power transmission line.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) Because the outer cylinder is lighter and less prone to shaking, it is easier to control the position of the working end of the outer cylinder. First, the hook is connected to the power transmission line. At this time, the power transmission line bears the weight of the outer cylinder. Then, the grounding wire is connected to the inner rod. Next, the inner rod is inserted into the outer cylinder and electrically connected to the clamping assembly. The clamping assembly clamps the grounding ring, thereby completing the grounding connection operation. By separating the lighter outer cylinder from the heavier grounding wire, it is easier for operators to quickly and accurately connect the clamping assembly to the grounding ring, which facilitates operation and improves work efficiency.

[0019] (2) The two side tubes and two connecting rods form a parallelogram structure, and the four sides of the parallelogram are of equal length. The push rod slides along the axial direction of the outer tube, causing the parallelogram to deform so that one end of the side tube moves away from or closer to the working end of the outer tube, thereby changing the distance between the clamping components on the side tube and the clamping components on the working end of the outer tube to adapt to the distance between adjacent transmission lines, thus facilitating the simultaneous grounding connection operation of the grounding rings on the three transmission lines, further facilitating operation and improving work efficiency.

[0020] (3) The double hook setting can improve the connection stability between the outer cylinder and the power transmission line, reduce the probability of falling due to the failure of the outer cylinder connection, and at the same time, the two hooks can be quickly attached to the power transmission line before subsequent operations are carried out. The operation is convenient and the work efficiency is high. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the telescopic grounding device for power operations according to the present invention;

[0022] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 for Figure 2 A magnified view of a section at point B in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the telescopic grounding device for power operations of the present invention after being cut along a plane perpendicular to the power transmission line.

[0025] Figure 5 for Figure 4 A magnified view of a section at point C;

[0026] Figure 6 for Figure 4 A magnified view of a section at point D;

[0027] Figure 7 for Figure 4 A magnified view of a section at point E in the middle;

[0028] Figure 8 for Figure 4 A magnified view of a section at point F in the middle;

[0029] Figure 9 for Figure 1 The main view;

[0030] Figure 10 for Figure 9 A cross-sectional view along the GG direction;

[0031] Figure 11 This is a schematic diagram of the structure of the guide pin after it has been cut along a vertical plane.

[0032] in:

[0033] 100. Power transmission line; 101. Grounding ring;

[0034] 201. Outer cylinder; 202. Inner rod; 203. Hook; 204. Push rod; 205. Side cylinder; 206. Connecting rod; 207. Guide hole; 208. Guide pin; 209. Retaining ring; 210. Clamp; 211. Swing rod; 212. Long slot; 213. First pull rod; 214. Locking pin; 215. Spring; 216. Second pull rod; 217. Pull rope; 218. Main passage; 219. First hole; 220. Second hole; 221. Sleeve; 222. End cap; 223. Locking bolt; 224. Ring groove; 225. Fixing bolt; 226. Groove; 227. Hanging entrance. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative of the invention and are not intended to limit the invention.

[0036] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] like Figures 1 to 11 As shown, this embodiment of the invention provides a telescopic grounding device for power operations, including a telescopic outer cylinder 201 and an inner rod 202. The two ends of the outer cylinder 201 are a handheld end and a working end, respectively. The working end is provided with a hook 203 and a clamping assembly. The hook 203 is used to hook onto the power transmission line 100. The inner rod 202 is detachable and coaxially inserted into the outer cylinder 201, so that one end of the inner rod 202 can be electrically connected to the clamping assembly. A grounding wire is detachably connected to the inner rod 202. A grounding ring 101 is provided on the power transmission line 100. The clamping assembly can clamp or release the grounding ring 101.

[0039] Because the outer cylinder 201 is lighter and less prone to wobbling, its working end position is easier to control. First, hook 203 is connected to the power transmission line 100, at which point the power transmission line 100 bears the weight of the outer cylinder 201. Then, the grounding wire is connected to the inner rod 202. Next, the inner rod 202 is inserted into the outer cylinder 201 and electrically connected to the clamping assembly. The clamping assembly clamps the grounding ring 101, thus completing the grounding connection operation. By separating the lighter outer cylinder 201 from the heavier grounding wire, operators can quickly and accurately connect the clamping assembly to the grounding ring 101, simplifying operation and improving work efficiency.

[0040] Both the outer cylinder 201 and the inner rod 202 are telescopic structures. For example, the outer cylinder 201 is composed of multiple cylindrical sections, such as... Figure 1 and Figure 4 As shown, the upper cylinder is slidably inserted into the lower cylinder. The outer surface of the upper cylinder has external threads, and the inner surface of the lower cylinder has internal threads. Figure 7 As shown, the outer cylinder 201 is kept in an extended state by external and internal threads, and a limiting structure is provided to prevent the upper cylinder from separating from the lower cylinder. The outer cylinder 201 and the inner rod 202 can also adopt other telescopic structures to achieve their respective telescopic functions. The specific structures are existing technologies and will not be described in detail here. Figure 1 In the middle, the upper end of the outer cylinder 201 is the working end, and the lower end is the hand-held end. When in use, the outer cylinder 201 is extended, and after the outer cylinder 201 is connected to the power transmission line 100 through the hook 203, the grounding wire is connected to the inner rod 202, and then the inner rod 202 is extended and inserted into the outer cylinder 201 through the hand-held end.

[0041] The grounding ring 101 should be installed on the transmission line 100 in advance. The installation process is roughly as follows: the operator uses an insulated operating rod with an insulation level that matches the voltage of the transmission line 100 and takes appropriate personal protective measures. A certain length of the outer sheath of the transmission line 100 is stripped off so that the transmission line 100 is inserted into the built-in slot or clamp structure of the grounding ring 101. Then, the insulated operating rod is used to tighten the anti-loosening bolts of the grounding ring 101.

[0042] In one embodiment, see Figure 2 and Figure 6 A push rod 204 is slidably provided inside the outer cylinder 201 along its axial direction. Side cylinders 205 and connecting rods 206 are provided on both sides of the outer cylinder 201. A clamping assembly is provided at one end of the side cylinder 205, and the other end of the side cylinder 205 is hinged to the push rod 204. One end of the connecting rod 206 is hinged to the working end, and the other end of the connecting rod 206 is hinged to the middle of the side cylinder 205. The length of the connecting rod 206 is equal to half the length of the side cylinder 205.

[0043] The two side cylinders 205 and the two connecting rods 206 form a parallelogram structure with all four sides of equal length. The push rod 204 slides along the axial direction of the outer cylinder 201, deforming the parallelogram so that one end of the side cylinder 205 moves away from or closer to the working end of the outer cylinder 201. This changes the distance between the clamping components on the side cylinder 205 and the clamping components on the working end of the outer cylinder 201 until it is adapted to the distance of the adjacent power transmission lines 100. This facilitates the simultaneous grounding connection of the grounding rings 101 on the three power transmission lines 100, further simplifying the operation and improving work efficiency.

[0044] The outer cylinder 201 has a guide hole 207 on its side wall along its axial direction, and the other end of the side cylinder 205 is provided with a guide pin 208. The guide pin 208 slides along the guide hole 207, and the other end of the side cylinder 205 is hinged to the push rod 204 through the guide pin 208.

[0045] The transmission line 100 is generally three-phase, so a total of three clamping components are set to clamp the three transmission lines 100.

[0046] In one embodiment, see Figure 7 A retaining ring 209 is formed on the push rod 204. When the first external force is applied to the inner rod 202, the inner rod 202 can slide along the axial direction of the outer cylinder 201, and drive the push rod 204 to slide along the axial direction of the outer cylinder 201 through the retaining ring 209, thereby deforming the parallelogram structure.

[0047] The first external force enables the inner rod 202 to slide along the axial direction of the outer cylinder 201 and from the hand-held end to the working end.

[0048] In one embodiment, see Figure 3 and Figure 5 The clamping assembly includes two opposing clamps 210, each clamp having a first end and a second end. The first end is hinged to the outer cylinder 201 or the side cylinder 205. The second ends of the two clamps 210 are either far apart from each other or tend to be far apart from each other. When a second external force is applied to the inner rod 202, the second ends of the two clamps 210 move closer to each other to clamp the grounding ring 101.

[0049] After the hook 203 is connected to the power transmission line 100, the two oppositely positioned and open clamps 210 are located outside the grounding ring 101. Then, the second ends of the two clamps 210 are controlled to move closer to each other to clamp the grounding ring 101, which further facilitates operation and improves work efficiency.

[0050] In one embodiment, a swing rod 211 is fixed at the first end. The swing rod 211 is set at an angle to the clamp 210. An elongated hole 212 is provided on the swing rod 211 along its length direction. A first pull rod 213 is slidably provided inside the outer cylinder 201 and the side cylinder 205. A locking pin 214 is provided on the first pull rod 213. The locking pin 214 slides along the elongated hole 212. When a second external force is applied to the inner rod 202, the first pull rod 213 slides along the outer cylinder 201 or the side cylinder 205.

[0051] When the second external force is applied to the inner rod 202, the first pull rod 213 on the outer cylinder 201 slides along the axial direction of the outer cylinder 201, and the first pull rod 213 on the side cylinder 205 slides along the length direction of the side cylinder 205. The swing rod 211 is pulled to swing through the locking pin 214. For a clamping assembly, the two clamps 210 swing synchronously, thereby driving the second ends of the two clamps 210 to move closer to each other to clamp the grounding ring 101.

[0052] A spring 215 is provided between the first pull rod 213 and the outer cylinder 201 or the side cylinder 205, so that the first pull rod 213 has a tendency to slide towards the clamping assembly, thereby causing the second ends of the two clamps 210 to move away from each other or have a tendency to move away from each other.

[0053] In one embodiment, the first pull rod 213 has a square cross-section, and the side of the swing rod 211 is a plane. The side of the first pull rod 213 fits against the side of the swing rod 211 to increase the conductive contact area between the first pull rod 213 and the swing rod 211 and avoid conductive failure; at the same time, the first pull rod 213 can only slide along the axial direction of the outer cylinder 201.

[0054] In one embodiment, see Figure 7 The push rod 204 has a first through hole along the axial direction of the outer cylinder 201. A second pull rod 216 is slidably installed in the first through hole. A pull rope 217 is provided between the first pull rod 213 and the second pull rod 216. The second pull rod 216 can be connected to the inner rod 202 by a thread. When a second external force is applied to the inner rod 202, the inner rod 202 rotates circumferentially along the outer cylinder 201.

[0055] A second external force is applied to the inner rod 202 to make the inner rod 202 rotate circumferentially along the outer cylinder 201. The second pull rod 216 is driven to slide axially along the outer cylinder 201 through the threaded connection. The first pull rod 213 is pulled along the outer cylinder 201 or the side cylinder 205 through the pull rope 217, thereby driving the second ends of the two clamps 210 to move closer to each other to clamp the grounding ring 101.

[0056] Among them, see Figure 10 and Figure 11 A main passage 218 is coaxially formed within the guide pin 208. A first hole 219 communicating with the main passage 218 is opened in the middle of the guide pin 208. The pull rope 217 inside the outer cylinder 201 passes through the first hole 219 and enters the push rod 204, after which the pull rope 217 is connected to the second pull rod 216. Near both ends of the guide pin 208, second holes 220 communicating with the main passage 218 are opened. The pull rope 217 inside the side cylinder 205 passes through the second hole 220 and enters the main passage 218, then merges with the pull rope 217 inside the outer cylinder 201. The dimensions of both the first hole 219 and the second hole 220 are larger than the dimensions of the pull rope 217, ensuring that the rotation of the guide pin 208 does not affect the power transmission effect of the pull rope 217 inside the outer cylinder 201 and the pull rope 217 inside the side cylinder 205.

[0057] The two ends of the pull rope 217 can be fixed to the first pull rod 213 or the second pull rod 216 by screws. Figure 6As shown, the upper end of the push rod 204 is provided with a sleeve 221. The upper end of the sleeve 221 is fixed to the outer cylinder 201. The pull rope 217 passes through the sleeve 221 and enters the first through hole of the push rod 204, and is finally fixed to the second pull rod 216. The sleeve 221 is made of elastic material and can be bent and deformed. When the push rod 204 slides along the axial direction of the outer cylinder 201, the sleeve 221 bends, keeping the pull rope 217 taut. However, the pull rope 217 is also subject to the action of the spring 215, thus ensuring that the second pull rod 216 initially has an upward tendency, thereby preventing the second pull rod 216 from detaching from the lower end of the first through hole.

[0058] Among them, such as Figure 7 As shown, the upper end of the second tie rod 216 is provided with a spline, and the lower end of the first through hole is provided with a spline groove, so that the second tie rod 216 can only slide along the axial direction of the first through hole, i.e., the outer cylinder 201. The lower end of the second tie rod 216 is provided with an external thread, and the upper end of the inner rod 202 is provided with an internal thread. The inner rod 202 and the second tie rod 216 are connected by the external thread and the internal thread.

[0059] Furthermore, when the upper end of the inner rod 202 abuts against the retaining ring 209, the external thread at the lower end of the second pull rod 216 is exactly in the initial position of connecting with the internal thread at the upper end of the inner rod 202. At this time, applying a first external force to the inner rod 202 causes the inner rod 202 to slide axially along the outer cylinder 201, which can drive the push rod 204 to slide axially along the outer cylinder 201 through the retaining ring 209, thereby adapting the distance between adjacent clamping components to the distance between adjacent power transmission lines 100; then applying a second external force to the inner rod 202 causes the inner rod 202 to rotate circumferentially along the outer cylinder 201, which can also drive the second pull rod 216 to slide axially along the outer cylinder 201 through the threaded connection, thereby causing the two clamps 210 to clamp the grounding ring 101.

[0060] When the clamping assembly is connected to the grounding ring 101, the current path is as follows: power transmission line 100, grounding ring 101, clamp 210, swing rod 211, locking pin 214, first pull rod 213, pull rope 217, second pull rod 216, inner rod 202, and grounding wire, finally leading to the ground. Therefore, all of the above components are made of conductive materials.

[0061] In one embodiment, see Figure 8 The hand-held end is open and rotatable and has an end cap 222. The end cap 222 has a second through hole along the axial direction of the outer cylinder 201. The inner rod 202 passes through the second through hole. The end cap 222 has a threaded hole along the radial direction of the outer cylinder 201. A locking bolt 223 is provided in the threaded hole. When the locking bolt 223 is tightened, its end can abut against the inner rod 202 to restrict the inner rod 202 from sliding along the axial direction of the outer cylinder 201.

[0062] The inner rod 202 is pushed to slide axially along the outer cylinder 201, causing the push rod 204 to slide axially along the outer cylinder 201, thereby changing the distance between the clamping assembly on the side cylinder 205 and the clamping assembly on the working end of the outer cylinder 201 to adapt to the distance of adjacent power transmission lines 100. Then, the locking bolt 223 is tightened so that its end abuts against the inner rod 202 to restrict the inner rod 202 from sliding axially along the outer cylinder 201. At this time, the rotating end cap 222 causes the inner rod 202 to rotate axially around the outer cylinder 201, and the threaded connection causes the second pull rod 216 to slide axially along the outer cylinder 201. The pull rope 217 pulls the first pull rod 213 to slide axially along the outer cylinder 201, thereby causing the second ends of the two clamps 210 to move closer to each other to clamp the grounding ring 101.

[0063] The end cap 222 has an annular groove 224 on its outer circumferential surface. The hand-held end of the outer cylinder 201 is provided with a fixing bolt 225. When the fixing bolt 225 is tightened, its end is located in the annular groove 224, so that the end cap 222 can always drive the inner rod 202 to rotate relative to the outer cylinder 201. At the same time, since the inner rod 202 is threadedly connected to the second pull rod 216, the rotation angle of the inner rod 202 can also be self-locked, thereby locking the clamping state of the clamping assembly.

[0064] In one embodiment, see Figure 5 The two clamps 210 are provided with grooves 226 on the side that are close to each other. When the two clamps 210 clamp the grounding ring 101, the grooves 226 are used to limit the grounding ring 101.

[0065] The groove 226 has an arc-shaped cross-section, and its corresponding radius is larger than that of the grounding ring 101, so as to achieve a more stable limiting effect on the grounding ring 101, and is applicable to grounding rings 101 with different radii.

[0066] In one embodiment, see Figure 3 The hook 203 has a hook inlet 227. The power transmission line 100 enters the hook 203 through the hook inlet 227 so that the hook 203 is hooked to the power transmission line 100. Two hooks 203 are centrally symmetrical about the axis of the outer cylinder 201. The hook inlets 227 of the two hooks 203 face opposite directions. When the clamping assembly clamps the grounding ring 101, the two hooks 203 are arranged sequentially along the length of the power transmission line 100.

[0067] After the outer cylinder 201 extends to a certain length, the position of the working end of the outer cylinder 201 is controlled so that the power transmission line 100 is positioned between the two hooks 203. Then, the outer cylinder 201 is rotated around its axis by a certain angle, so that the power transmission line 100 enters the hook 203 from the hook inlet 227, thereby hooking the hook 203 with the power transmission line 100. At this time, the power transmission line 100 bears the weight of the outer cylinder 201. The double hook setting can improve the connection stability between the outer cylinder 201 and the power transmission line 100, reduce the probability of the outer cylinder 201 falling due to connection failure, and at the same time, the two hooks 203 are quickly hooked onto the power transmission line 100 before subsequent operations are carried out, which is convenient and efficient.

[0068] In use, the grounding ring 101 is pre-installed on the power transmission line 100, and the outer cylinder 201 is extended. Since the outer cylinder 201 is relatively light and does not easily shake, it is easy to control the position of the working end of the outer cylinder 201. First, the power transmission line 100 is positioned between the two hooks 203, and then the outer cylinder 201 is rotated around its axis by a certain angle so that the power transmission line 100 enters the hook 203 from the hook inlet 227, thereby hooking the hook 203 with the power transmission line 100. At this time, the power transmission line 100 bears the weight of the outer cylinder 201. By separating the lighter outer cylinder 201 from the heavier grounding wire, it is easy for the operator to quickly and accurately connect the clamping component to the grounding ring 101, which facilitates operation and improves work efficiency.

[0069] Connect the grounding wire to the inner rod 202. After extending the inner rod 202, insert it into the end cap 222 of the hand-held end of the outer cylinder 201 until the upper end of the inner rod 202 abuts against the retaining ring 209. At this time, apply the first external force to the inner rod 202 to make the inner rod 202 slide along the axial direction of the outer cylinder 201. And drive the push rod 204 to slide along the axial direction of the outer cylinder 201 through the retaining ring 209, so that the parallelogram structure formed by the two side cylinders 205 and the two connecting rods 206 is deformed, so that one end of the side cylinder 205 is far away from the working end of the outer cylinder 201, so as to increase the distance between the clamping components on the side cylinder 205 and the clamping components on the working end of the outer cylinder 201, until it is adapted to the distance of the adjacent power transmission line 100. At this time, tighten the locking bolt 223 so that its end abuts against the inner rod 202 to restrict the inner rod 202 from sliding along the axial direction of the outer cylinder 201.

[0070] A second external force is applied to the inner rod 202 to make the inner rod 202 rotate circumferentially along the outer cylinder 201. The second pull rod 216 is driven to slide axially along the outer cylinder 201 through the threaded connection. The first pull rod 213 is pulled to slide along the outer cylinder 201 or the side cylinder 205 through the pull rope 217. The swing rod 211 is pulled to swing through the locking pin 214. For a clamping assembly, the two clamps 210 swing synchronously, thereby driving the second ends of the two clamps 210 to move closer to each other to clamp the grounding ring 101, so as to make the electrical connection between the inner rod 202 and the clamping assembly, thereby completing the grounding connection operation.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A retractable grounding device for power operations, characterized in that, The device includes a retractable outer cylinder and an inner rod. The outer cylinder has a handheld end and a working end at its two ends. The working end is equipped with a hook and a clamping assembly. The hook is used to attach to a power transmission line. The inner rod is detachable and coaxially inserted into the outer cylinder, so that one end of the inner rod can be electrically connected to the clamping assembly. A grounding wire is detachably connected to the inner rod. A grounding ring is provided on the power transmission line. The clamping assembly can clamp or release the grounding ring. The outer cylinder has a push rod that slides along its axial direction. Both sides of the outer cylinder have side cylinders and connecting rods. One end of the side cylinder has a clamping assembly, and the other end of the side cylinder is hinged to the push rod. One end of the connecting rod is hinged to the working end, and the other end of the connecting rod is hinged to the middle of the side cylinder. The length of the connecting rod is equal to half the length of the side cylinder. The push rod has a retaining ring. When a first external force is applied to the inner rod, the inner rod can slide along the axial direction of the outer cylinder, and the retaining ring drives the push rod to slide along the axial direction of the outer cylinder. The clamping assembly includes two opposing clamps, each clamp having a first end and a second end. The first end is hinged to the outer cylinder or the side cylinder. The second ends of the two clamps are either far apart from each other or tend to be far apart from each other. When a second external force is applied to the inner rod, the second ends of the two clamps move closer to each other to clamp the grounding ring. The first end is fixed with a swing rod, which is set at an angle to the clamp. The swing rod has an elongated hole along its length. The outer cylinder and the side cylinder are both slidably provided with a first pull rod. The first pull rod is provided with a locking pin, which slides along the elongated hole. When the second external force is applied to the inner rod, the first pull rod slides along the outer cylinder or the side cylinder. The push rod has a first through hole along the axial direction of the outer cylinder, and a second pull rod is slidably disposed in the first through hole. A pull rope is provided between the first pull rod and the second pull rod. The second pull rod can be connected to the inner rod by a thread. When the second external force is applied to the inner rod, the inner rod rotates circumferentially along the outer cylinder. A spring is provided between the first pull rod and the outer cylinder or side cylinder, so that the first pull rod has a tendency to slide toward the clamping assembly, thereby causing the second ends of the two clamps to move away from each other or have a tendency to move away from each other.

2. The telescopic grounding device for power operations according to claim 1, characterized in that, The first pull rod has a square cross-section, and the side of the swing rod is flat. The side of the first pull rod fits against the side of the swing rod.

3. The telescopic grounding device for power operations according to claim 1, characterized in that, The handheld end is open and rotatably equipped with an end cap. The end cap has a second through hole along the axial direction of the outer cylinder. The inner rod passes through the second through hole. The end cap has a threaded hole along the radial direction of the outer cylinder. A locking bolt is provided in the threaded hole. When the locking bolt is tightened, its end can abut against the inner rod to restrict the inner rod from sliding along the axial direction of the outer cylinder.

4. The telescopic grounding device for power operations according to claim 1, characterized in that, The two clamps are provided with grooves on their sides that are close to each other. When the two clamps clamp the grounding ring, the grooves are used to limit the grounding ring.

5. The telescopic grounding device for power operations according to claim 1, characterized in that, The hook has a hooking inlet, and the power transmission line enters the hook through the hooking inlet so that the hook can be hooked with the power transmission line; two hooks are arranged symmetrically about the axis of the outer cylinder, and the hooking inlets of the two hooks face opposite directions. When the clamping assembly clamps the grounding ring, the two hooks are arranged sequentially along the length of the power transmission line.

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