Universal grounding and matching device for power cable end

Abstract

The utility model discloses a kind of general grounding and matching device of power transmission cable end, including insulated operating lever and the cable end clamping mechanism at the end of the insulated operating lever, the cable end clamping mechanism includes wire clamp body and is used for clamping cable end rotating manipulator.The utility model movable operating lever makes wire clamp opening towards the cable head of required hanging, make soft copper wire braiding line contact cable head;Soft copper wire braiding line pulls two rotating manipulators and drives locking reset spring, soft copper wire braiding line is buckled tight cable head by telescopic adjusting spring, using soft copper braiding band to carry out surrounding clamping, soft copper braiding band has the characteristics of flexible, can clamp the cable head terminal of different shape, improve the applicability of device, soft copper braiding band also has the characteristics of good conductivity, make grounding function more reliable;Through telescopic adjusting spring and locking reset spring, the tightness of wire clamp device and self-locking are realized, improve the stability of device connection.

Description

Technical Field

[0001] This invention relates to the field of power system technology, specifically to a universal grounding and matching device for power transmission cable ends. Background Technology

[0002] When inspecting and repairing power transmission line cable heads, grounding needs to be installed on the cable heads. Since the current-draining plate needs to be removed, the grounding wire can only be installed on the cable end. Currently, the structure of cable ends varies on site, and traditional cable end grounding devices cannot be directly inserted into the cable end. Existing cable end grounding devices are only suitable for cylindrical cable ends, which has poor applicability, while temporary installation methods are cumbersome and pose safety hazards.

[0003] For example, Chinese patent CN207938842U, published on October 2, 2018, discloses a grounding device for a 10kV elbow-type cable termination. The device includes an operating rod with a clamp at its upper end. The clamp comprises a C-shaped bracket, a stationary clamp, and a movable clamp. The stationary and movable clamps are horizontally arranged within the C-shaped bracket, with the stationary clamp positioned above the movable clamp. A spring is provided between the bottom of the movable clamp and the C-shaped bracket. A grounding wire is connected to the side of the C-shaped bracket via a terminal block. The operating rod has an operating mechanism, including an operating handle and a connecting rod. The handle is connected to the lower end of the connecting rod, and the upper end of the connecting rod passes through the C-shaped bracket and the spring, connecting to the bottom of the movable clamp. This device suffers from cumbersome operation, low connection stability, and poor applicability. Summary of the Invention

[0004] The technical problem this invention aims to solve is the poor applicability of current cable end grounding devices. This invention proposes a universal grounding and supporting device for power transmission cable ends with high applicability.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a universal grounding and supporting device for power transmission cable ends, including an insulating operating rod and a cable end clamping mechanism located at the end of the insulating operating rod, wherein the cable end clamping mechanism includes a wire clamp body and a rotating manipulator for clamping the cable end.

[0006] A universal grounding and matching device for power transmission cable ends is disclosed. First, the insulating operating rod is connected to the clamp positioning pin of the clamp, fixing the clamp to the insulating operating rod. The operating rod is moved so that the clamp opening faces the cable end to be hung, allowing the soft copper wire braid to contact the cable end. Then, the operating rod is pushed forward, moving the clamp towards the cable end. At this time, the soft copper wire braid pulls the two rotating manipulators on the left and right, driving the locking and returning spring. The soft copper wire braid, through the telescopic adjustment spring, clamps the cable end, pulling the rotating manipulators towards the center of the clamp body. Simultaneously, the two rotating manipulators rotate along their rotation axis. With the clamp body clamping the cable end, the locking and returning springs lock the two rotating manipulators, preventing them from automatically opening. When the operation is complete and the clamp needs to be removed, simply pull the operating rod back, ensuring the pulling force is greater than the contraction force of the locking and returning spring. The cable end will then push the rotating manipulators apart, opening the clamp opening, allowing the clamp body to be removed.

[0007] Preferably, the cable clamp body includes two support arms, and the cable end clamping mechanism includes two rotating manipulators. The ends of the two support arms are provided with contact ends for connecting with the rotating manipulators, and each contact end is provided with a rotating shaft. The rotating manipulators are connected to the cable clamp body through the corresponding rotating shafts.

[0008] The wire clamp body is U-shaped, including a middle part of the clamp body and two support arms. The middle part of the wire clamp body is connected to the insulating operating rod. The ends of the two support arms of the wire clamp body serve as contact ends for connection with a rotary manipulator. A rotary manipulator is installed at each of the two contact ends of the wire clamp body, and the rotary manipulators are connected to each other by a soft copper wire braided wire.

[0009] Preferably, the two rotary manipulators are connected by a metal wire. One end of each manipulator is rotatably connected to a wire clamp via a rotating shaft, and the other end is connected by a soft copper braided wire, i.e., a metal wire.

[0010] Preferably, each rotary manipulator is equipped with a telescopic adjustment spring between itself and the metal wire to enhance the tightness of the connection with the cable end. Both rotary manipulators have telescopic adjustment springs at their ends, which are connected to the metal wire. This allows the metal wire to be tightly pressed against the cable end when clamping it, ensuring a stable connection.

[0011] Preferably, the end of the rotary manipulator away from the clamp body is provided with a locking return spring for locking the cable end, and the locking return spring is connected to the contact end of the corresponding clamp body.

[0012] The rotary manipulator is also U-shaped, including a middle connecting part and two rotating connecting plates. The middle connecting part is connected to the metal wire through a telescopic adjustment spring, and the ends of the two rotating connecting plates are connected to the wire clamp body through a rotating shaft.

[0013] A locking and return spring is located at the end of the rotary manipulator furthest from the wire clamp body, i.e., at the middle connecting part of the rotary manipulator. This locking and return spring is connected to the contact end of the wire clamp body. The contact point 'a' between the locking and return spring and the wire clamp body is located closer to the insulating operating rod than the rotating shaft. Let 'x' be the line connecting the contact point 'a' to the rotating shaft. The angle between line 'x' and the wire clamp body support arm is between 30 and 60 degrees, typically 45 degrees. When the angle between the rotary manipulator and the wire clamp body support arm is 45 degrees, the locking and return spring is at its maximum tension, providing the force to automatically open or close the rotary manipulator to both sides. Thus, when the cable end clamping mechanism clamps the cable end (i.e., the two rotary manipulators are in a closed state), the telescopic adjustment spring keeps the metal wire tightly against the cable end, and the locking and return spring controls and maintains the closed state of the rotary manipulator, ensuring the device is in fixed contact with the cable end.

[0014] Preferably, the support arm of the wire clamp body is provided with a connecting hole for the metal wire to pass through, and the support arm of the wire clamp body is provided with a fixing screw for fixing the metal wire. The metal wire can pass through the connecting hole on one side of the support arm and be connected and fixed with the fixing screw.

[0015] Preferably, the clamp body is connected to the insulating operating rod via a clamp positioning pin. A positioning pin is provided at the connection between the clamp body and the insulating operating rod, and the connection and fixation between the clamp body and the insulating operating rod are achieved by rotating the insulating operating rod or the clamp body.

[0016] Preferably, the insulating operating rod is covered with an insulating sleeve. This insulating sleeve prevents slippage when removing or assembling the insulating operating rod.

[0017] Preferably, the clamp body is provided with a connecting threaded hole for connecting to the grounding wire. The connecting threaded hole is provided in the middle of the clamp body near the clamp positioning pin. The grounding wire is connected through the connecting threaded hole. After the metal wire clamps the cable end, it passes through the connecting hole and is connected to the support arm of the clamp body by a fixing screw. Then, it is connected to the grounding wire through the connecting threaded hole of the clamp body to realize the grounding operation of the cable end.

[0018] Preferably, the cable end grounding process includes: moving the insulating operating rod to bring the metal wire into contact with the cable end; the metal wire clamping the cable end via a telescopic adjustment spring, pulling the rotating manipulator to close; the rotating manipulator rotating along its axis, locking the manipulator with a locking reset spring; after clamping the cable end, rotating the insulating operating rod to separate it from the clamp body; after construction is complete, using the clamp positioning pin, the insulating operating rod and clamp body are connected, and pulling the insulating operating rod pushes the cable end away from the rotating manipulator, removing the clamp body. These operations complete the grounding connection and disconnection of the cable end.

[0019] The essential effects of this invention are as follows: The movable operating lever of this invention allows the clamp opening to face the cable head to be hung, so that the soft copper wire braided wire contacts the cable head; the soft copper wire braided wire pulls the two left and right rotating robotic arms, which in turn drive the locking and returning spring. The soft copper wire braided wire, through the telescopic adjustment spring, clamps the cable head and pulls the rotating robotic arms to rotate towards the center of the clamp body; the two left and right rotating robotic arms rotate along the rotation axis, and the locking and returning spring locks the two left and right rotating robotic arms while the clamp body clamps the cable head, preventing the rotating robotic arms from automatically opening; after clamping the cable head, the operating lever can be separated from the clamp body by rotating the operating lever, preventing the operating lever from obstructing subsequent construction operations. When the operation is completed and the clamp needs to be removed, simply connect the operating lever to the clamp body through the clamp positioning pin, pull the operating lever back, and make the pulling force greater than the contraction force of the locking and returning spring. At this time, the cable head will push the rotating robotic arms aside, opening the clamp opening, and the clamp body can be removed.

[0020] This invention utilizes soft copper braided strips for encircling and clamping. The soft copper braided strips are flexible and can clamp cable ends of different shapes, improving the applicability of the device. The soft copper braided strips also have good conductivity, making the grounding function more reliable. The clamping and self-locking of the wire clamp device are achieved through telescopic adjustment springs and locking reset springs, improving the stability of the device connection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0022] Figure 2 This is a schematic diagram of the wire clamp in the open state according to this embodiment;

[0023] Figure 3 This is a schematic diagram of the locking and reset spring in its maximum tension state according to this embodiment;

[0024] Figure 4 This is a schematic diagram of the wire clamp in the closed state according to this embodiment.

[0025] The components include: 1. Insulated operating rod, 2. Wire clamp body, 3. Rotary manipulator, 4. Support arm, 5. Rotating shaft, 6. Metal wire, 7. Telescopic adjustment spring, 8. Locking and reset spring, 9. Fixing screw, 10. Wire clamp positioning pin, 11. Connecting hole, 12. Connecting threaded hole. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0027] A universal grounding and matching device for power transmission cable ends, such as Figure 1As shown, the device includes an insulating operating rod 1 and a cable end clamping mechanism located at the end of the insulating operating rod 1. An insulating sleeve is fitted over the insulating operating rod 1. The cable end clamping mechanism includes a clamp body 2 and a rotating manipulator 3 for clamping the cable end. The clamp body 2 is connected to the insulating operating rod 1 via a clamp positioning pin 10. A positioning pin is provided at the connection point between the clamp body 2 and the insulating operating rod 1. The connection and fixation of the clamp body 2 and the insulating operating rod 1 are achieved by rotating either the insulating operating rod 1 or the clamp body 2.

[0028] The wire clamp body 2 includes two support arms 4 and contact ends located at the ends of the support arms 4. Each support arm 4 has a rotating manipulator 3 at its end, which is connected to the wire clamp body 2 via a rotating shaft 5. The wire clamp body 2 is U-shaped, including a middle section and two support arms 4. The middle section of the wire clamp body 2 is connected to an insulating operating rod 1. The ends of the two support arms 4 of the wire clamp body 2 serve as contact ends for connection with the rotating manipulators 3. A rotating manipulator 3 is provided at each of the two contact ends of the wire clamp body 2, and the rotating manipulators 3 are connected to each other by a soft copper braided wire. The support arms 4 of the wire clamp body 2 have connecting holes 11 for metal wires 6 to pass through, and fixing screws 9 for fixing the metal wires 6 are provided on the support arms 4 of the wire clamp body 2. The metal wires 6 can pass through the connecting holes 11 of one support arm 4 and be connected and fixed by the fixing screws 9.

[0029] The two rotating robotic arms 3 are connected by a metal wire 6, such as Figure 2 As shown. One end of each of the two rotary manipulators 3 is rotatably connected to the cable clamp body 2 via a rotating shaft 5, and the other ends of the two rotary manipulators 3 are connected via a soft copper braided wire, i.e., a metal wire 6. A telescopic adjustment spring 7 is provided between the rotary manipulator 3 and the metal wire 6 to enhance the tightness of the connection with the cable end. Each end of the two rotary manipulators 3 is equipped with a telescopic adjustment spring 7, which is connected to the metal wire 6. Thus, when clamping the cable end, the telescopic adjustment spring 7 can be used to ensure that the metal wire 6 is tightly pressed against the cable end, ensuring the stability of the connection.

[0030] The rotary manipulator 3 is provided with a locking return spring 8 at the end away from the wire clamp body 2 for locking the cable end. The locking return spring 8 is connected to the contact end of the corresponding wire clamp body 2.

[0031] The rotary manipulator 3 is also U-shaped, including a central connecting part and two rotating connecting plates. The central connecting part is connected to the metal wire 6 via a telescopic adjustment spring 7. The ends of the two rotating connecting plates are connected to the wire clamp body 2 via a rotating shaft 5. A locking and returning spring 8 is provided at the central connecting part of the rotary manipulator 3, away from the wire clamp body 2. The locking and returning spring 8 is connected to the contact end of the wire clamp body 2. Let point a be the contact point between the locking and returning spring 8 and the wire clamp body 2. Point a is located closer to the insulating operating rod 1 than the rotating shaft 5. Let x be the line connecting point a and the rotating shaft 5. The angle between line x and the support arm 4 of the wire clamp body 2 is between 30 and 60 degrees, typically 45 degrees. Thus, when the angle between the rotary manipulator 3 and the support arm 4 of the wire clamp body 2 is 45 degrees, the locking and returning spring 8 is in its maximum tension state. Figure 3 As shown, this provides the force to automatically open or close the rotating manipulators 3 to both sides. Thus, when the cable end clamping mechanism clamps the cable end, i.e., when the two rotating manipulators 3 are in the closed state, as... Figure 4 As shown, the metal wire 6 is pressed tightly against the cable end by the telescopic adjustment spring 7, and the locking and reset spring 8 controls the closed state of the rotating manipulator 3 to ensure that the device is in contact and fixed with the cable end. The wire clamp body 2 is provided with a connecting threaded hole 12 for connecting with the grounding wire, and the metal wire 6 is connected to the grounding wire through the connecting threaded hole 12.

[0032] In this embodiment, the operating lever is moved to align the clamp opening with the cable head to be hung, allowing the soft copper braided wire to contact the cable head. The soft copper braided wire pulls the two rotating manipulators 3, which in turn drive the locking and resetting springs 8. The soft copper braided wire then clamps the cable head through the telescopic adjustment springs 7, pulling the rotating manipulators 3 towards the center of the clamp body 2. The two rotating manipulators 3 rotate along the rotation axis 5. With the clamp body holding the cable head, the locking and resetting springs 8 lock the two rotating manipulators 3, preventing them from automatically springing open. After clamping the cable head, the operating lever can be rotated to separate it from the clamp body 2, preventing it from obstructing subsequent construction operations. When the operation is complete and the clamp needs to be removed, the operating lever is connected to the clamp body 2 via the clamp positioning pin 10. The operating lever is then pulled back until the pulling force is greater than the contraction force of the locking and resetting springs 8. At this point, the cable head will push the rotating manipulators 3 apart, opening the clamp opening, and the clamp body 2 can be removed.

[0033] This embodiment utilizes soft copper braided strip for encirclement and clamping. The soft copper braided strip is flexible and can clamp cable ends of different shapes, improving the applicability of the device. The soft copper braided strip also has good conductivity, making the grounding function more reliable. The clamping and self-locking of the wire clamp device are achieved by the telescopic adjustment spring 7 and the locking and reset spring 8, which improves the stability of the device connection.

[0034] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. 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 all fall within the protection scope of the present invention.

Claims

1. A universal grounding and matching device for power transmission cable ends, characterized in that, It includes an insulating operating rod (1) and a cable end clamping mechanism located at the end of the insulating operating rod (1), the cable end clamping mechanism including a wire clamp body (2) and a rotary manipulator (3) for clamping the cable end. Rotary manipulators are connected by metal wires. A rotary manipulator with a telescopic adjustment spring at the end includes an intermediate connecting part and a rotating connecting plate. The intermediate connecting part is connected to the metal wires through the telescopic adjustment springs. The end of the rotating connecting plate is connected to the wire clamp body through a rotating shaft. One end of the rotary manipulator is equipped with a locking and return spring, which is connected to the contact end of the corresponding wire clamp body.

2. The universal grounding and supporting device for power transmission cable ends according to claim 1, characterized in that, The cable clamp body (2) includes two support arms (4), and the cable end clamping mechanism includes two rotating manipulators (3). The ends of the two support arms (4) are provided with contact ends for connecting with the rotating manipulators (3). Each contact end is provided with a rotating shaft (5). The rotating manipulators (3) are connected to the cable clamp body (2) through the corresponding rotating shafts (5).

3. The universal grounding and supporting device for power transmission cable ends according to claim 2, characterized in that, The clamp body is U-shaped, including a middle section and two support arms. The middle section of the clamp body is connected to the insulating operating rod.

4. A universal grounding and matching device for power transmission cable ends according to claim 3, characterized in that, Each rotary manipulator (3) is provided with a telescopic adjustment spring (7) between itself and the metal wire (6) to enhance the tightness of the connection with the cable end. When clamping the cable end, the telescopic adjustment spring makes the metal wire fit tightly against the cable end.

5. A universal grounding and matching device for power transmission cable ends according to claim 2, 3, or 4, characterized in that, The rotating manipulator (3) is provided with a locking return spring (8) for locking the cable end at one end away from the clamp body (2). The contact point a between the locking return spring and the clamp body is located closer to the insulating operating rod than the rotating shaft. Let the line x connecting the contact point a between the locking return spring and the clamp body and the rotating shaft be between 30 degrees and 60 degrees.

6. A universal grounding and matching device for power transmission cable ends according to claim 3 or 4, characterized in that, The support arm (4) of the wire clamp body (2) is provided with a connecting hole (11) for the metal wire (6) to pass through. The support arm (4) of the wire clamp body (2) is provided with a fixing screw (9) for fixing the metal wire (6). The metal wire passes through the connecting hole of one side of the support arm and is connected and fixed with the fixing screw.

7. A universal grounding and matching device for power transmission cable ends according to claim 1 or 2, characterized in that, The clamp body (2) is connected to the insulating operating rod (1) via the clamp positioning pin (10).

8. A universal grounding and matching device for power transmission cable ends according to claim 7, characterized in that, The insulating operating rod (1) is covered with an insulating rubber sleeve.

9. A universal grounding and matching device for power transmission cable ends according to claim 1 or 2, characterized in that, The clamp body (2) is provided with a threaded hole (12) for connecting to the grounding wire.

10. A universal grounding and matching device for power transmission cable ends according to claim 1, characterized in that, The grounding process at the cable end includes: Move the insulating operating rod (1) to bring the metal wire (6) into contact with the cable end; The metal wire (6) is fastened to the cable head by the telescopic adjustment spring (7), and the rotating manipulator (3) is pulled to close; The rotary manipulator (3) rotates along the rotating shaft (5), and the locking return spring (8) locks the rotary manipulator (3). After clamping the cable end, rotate the insulating operating rod (1) to separate the insulating operating rod (1) from the clamp body (2); After the construction is completed, the insulating operating rod (1) and the clamp body (2) are spliced ​​together by the clamp positioning pin (10), the insulating operating rod (1) is pulled to push the cable end open the rotating manipulator (3) and remove the clamp body (2).

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