Reverse self-locking connection wire clamp for ground potential operation of power distribution network

Abstract

A reverse self-locking connection wire clamp for ground potential operation of a power distribution network relates to the field of connection wire clamps and comprises a wire clamp body, the wire clamp body is provided with a first wire clamping groove and a second wire clamping groove with opposite openings, a first screw penetrates through the upper end of the groove wall of the first wire clamping groove, and the lower end of the first screw is located in the first wire clamping groove and is provided with a first pressing plate. The lower end of the groove wall of the second wire clamping groove is provided with a second screw rod in a penetrating manner, and the upper end of the second screw rod is located in the second wire clamping groove and is provided with a second pressing plate, and is characterized in that the lower edge of the groove wall of the second wire clamping groove is provided with a mounting groove, the lower end of the baffle plate is rotatably arranged in the mounting groove, and a torsion spring is arranged between the baffle plate and the mounting groove; the baffle plate can rotate towards the second wire clamping groove under the extrusion of an external force, and blocks the notch of the second wire clamping groove after the external force disappears. The utility model can solve the technical problem that in the prior art, a wire in the air is easy to separate from a corresponding wire clamping groove.

Description

Technical Field

[0001] This utility model relates to the field of splicing clamps, specifically a reverse self-locking splicing clamp for power distribution network ground potential operation. Background Technology

[0002] The connection clamp for distribution network ground potential work is a type of clamp that can be installed using a gun-type operating rod. It is widely applicable to the live disconnection and connection of operating rods in distribution network live work. Its structure is simple, and its operation is convenient and quick, which greatly reduces the labor intensity of live work personnel and improves the safety of the operation.

[0003] For example, Chinese utility model patent CN 210120247 U discloses a conductor splicing clamp for live-line work on power distribution lines, and Chinese utility model patent CN 216959167 U discloses a self-locking S-type clamp with a gun. In use, the ground conductor is first placed in one of the clamping slots of the splicing clamp and clamped. Then, the splicing clamp is mounted on a gun-type operating lever, which is used to send the splicing clamp into the air, placing the air conductor in the other clamping slot and clamping it. However, because the passage into the clamping slot is open, especially after the air conductor enters the corresponding clamping slot, it is easy for it to fall out. This requires readjusting the gun-type operating lever to send the detached conductor back into the slot, making the operation inconvenient. Utility Model Content

[0004] To address the technical problem that overhead conductors can easily detach from their corresponding clamping slots in existing technologies, this utility model provides a reverse self-locking splicing clamp for distribution network ground potential operation.

[0005] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a reverse self-locking splicing clamp for power distribution network ground potential operation, comprising a clamp body, the clamp body having a first clamping groove and a second clamping groove with openings facing away from each other, a first screw threaded through the upper end of the groove wall of the first clamping groove, the lower end of the first screw threaded within the first clamping groove and provided with a first pressure plate, a second screw threaded through the lower end of the groove wall of the second clamping groove, the upper end of the second screw threaded within the second clamping groove and provided with a second pressure plate, characterized in that: an installation groove is provided along the lower edge of the groove wall of the second clamping groove, the lower end of a baffle is rotatably disposed within the installation groove, and a torsion spring is provided between the baffle and the installation groove, the baffle being able to rotate into the second clamping groove under external pressure, and sealing the opening of the second clamping groove after the external force disappears.

[0006] As a further optimization of the above technical solution: an installation shaft is provided in the installation groove, the lower end of the baffle has a collar that can pass through the installation shaft, and torsion springs are sleeved on the installation shafts on both sides of the baffle. One end of the torsion spring is fixed to the surface of the baffle, and the other end is fixed to the inner wall of the installation groove.

[0007] As a further optimization of the above technical solution: the second clamping groove has a slot on its groove wall that corresponds to the mounting groove above and below.

[0008] As a further optimization of the above technical solution: a first mounting hole is provided on the side of the second clamping groove wall, and a second mounting hole is provided on the top of the groove wall. The first mounting hole and the second mounting hole are connected through a wire passage.

[0009] A limit strip and a spring for pushing the limit strip out of the first mounting hole are slidably installed in the first mounting hole. A pull rod is installed in the second mounting hole. The pull rod is connected to the limit strip through a traction line. The pull rod can move upward after being squeezed, and pull the limit strip to retract into the first mounting hole through the traction line.

[0010] As a further optimization of the above technical solution: one end of the traction line is connected to the end of the limiting strip, and the other end is connected to the middle of the pull rod.

[0011] As a further optimization of the above technical solution: both the first mounting hole and the second mounting hole are blind holes.

[0012] As a further optimization of the above technical solution: the spring is sleeved on the limiting strip, one end of the spring is fixed to the limiting strip, and the other end is fixed to the wall of the first mounting hole.

[0013] As a further optimization of the above technical solution: several rollers are provided in the cable passage, and the traction line is wound around the rollers.

[0014] As a further optimization of the above technical solution: one of the rollers is set at the junction of the first mounting hole and the wire passage.

[0015] As a further optimization of the above technical solution: the traction line is made of steel wire.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention features a baffle that rotates into the second wire clamping groove at its opening. After the wire enters the groove, the baffle resets under the torque of a torsion spring, confining the wire within the groove and preventing it from detaching. The lower end of the baffle is mounted on the groove wall. When the baffle is compressed, its upper end rotates into the groove, creating an upwardly inclined wire inlet channel between the baffle surface and the groove opening. This guides the wire to the upper part of the groove, facilitating the baffle's reset and subsequent compression of the wire by the second pressure plate.

[0018] This invention provides a limiting plate on the wall of the second wire clamping groove. In the initial state, the limiting plate locks the baffle inside the second wire clamping groove, leaving the groove opening open and reducing the resistance to the wire entering the second wire clamping groove. Attached Figure Description

[0019] Figure 1 This is a side view of Example 1;

[0020] Figure 2 for Figure 1 A schematic diagram of the baffle structure facing the groove opening inside the second clamping groove;

[0021] Figure 3 This is a side view of Example 2;

[0022] Figure 4 This is a side sectional view of Example 2 (when the baffle is locked by the limiting strip);

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a side sectional view of Example 2 (after the baffle is detached from the limiting strip);

[0025] Reference numerals in the attached drawings: 1. Wire clamp body; 101. Lower vertical section of the slot; 102. Wire trough base section; 103. Vertical connecting section of the trough wall; 104. Top plate section of the trough; 105. Upper vertical section of the slot; 2. First wire clamping groove; 3. First pressure plate; 4. First screw; 5. Nut; 6. Second wire clamping groove; 7. Baffle; 8. Second pressure plate; 9. Second screw; 10. Lifting ring; 11. Mounting shaft; 12. Torsion spring; 13. Mounting groove; 14. Slot; 15. Pull rod; 16. Second mounting hole; 17. Wire passage; 18. Roller; 19. Traction line; 20. Limiting strip; 21. First mounting hole; 22. Spring; 23. Wire. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as the structure of the gun-type operating lever.

[0027] Example 1

[0028] like Figure 1 , 2As shown, this embodiment discloses a reverse self-locking splicing clamp for power distribution network ground potential operation. Similar to existing technologies, the splicing clamp includes a clamp body 1, which has a first clamping groove 2 and a second clamping groove 6 with openings facing opposite directions. Both the first clamping groove 2 and the second clamping groove 6 are C-shaped grooves. A threaded hole is formed on the upper wall of the first clamping groove 2, through which a vertically arranged first screw 4 passes. The external thread of the first screw 4 is matched with the internal thread of the threaded hole. A nut 5 is fixed to the upper end of the first screw 4, and the lower end is located within the first clamping groove 2. A first pressure plate 3 is provided. Twisting the nut 5 causes the first screw 4 to move up and down, which can press the wire 23 into the first wire clamping groove 2. A threaded hole is opened on the groove wall at the lower end of the second wire clamping groove 6. The vertically arranged second screw 9 passes through the threaded hole, and the external thread of the second screw 9 is matched with the internal thread of the threaded hole. The upper end of the second screw 9 is located in the second wire clamping groove 6 and is provided with a second pressure plate 8. The lower end of the second screw 9 is fixed with a lifting ring 10. Twisting the lifting ring 10 can control the second screw 9 to move up and down, which can press the wire 23 into the second wire clamping groove 6.

[0029] Unlike existing technologies, the second wire clamping groove 6 has an installation groove 13 on the lower edge of its groove wall. The lower end of the baffle 7 is rotatably disposed in the installation groove 13, and a torsion spring 12 is provided between the baffle 7 and the installation groove 13. The baffle 7 can rotate into the second wire clamping groove 6 under external pressure and seal the opening of the second wire clamping groove 6 after the external force disappears.

[0030] Specifically, for ease of understanding, the wall of the second wire clamping groove 6 is divided into a vertical section 101 below the groove opening, a groove base section 102, a vertical connecting section 103 of the groove wall, a top plate section 104 of the groove, and a vertical section 105 above the groove opening, which are connected in sequence. The vertical section 101 below the groove opening, the groove base section 102, the vertical connecting section 103 of the groove wall, the top plate section 104 of the groove, and the vertical section 105 above the groove opening together form the second wire clamping groove 6. The vertical section 101 below the groove opening and the groove opening... The upper vertical section 105 forms the opening of the second clamping groove 6. The second screw 9 is threaded onto the groove base section 102. The groove base section 102 is a horizontally set plate. When the lower plate of the second pressure plate 8 abuts against the groove base section 102, the upper plate of the second pressure plate 8 is lower than the upper edge of the lower vertical section 101 of the groove opening. The inner walls of the groove top plate section 104 and the upper vertical section 105 of the groove opening are both arc-shaped to enclose an arc-shaped area for accommodating the wire 23.

[0031] The lower edge of the groove wall of the second wire clamping groove 6 is the lower vertical section 101 of the groove opening. The lower vertical section 101 of the groove opening has an upward-opening mounting groove 13. The mounting groove 13 is provided with a mounting shaft 11. The lower end of the baffle 7 has a collar that can pass through the mounting shaft 11. Torsion springs 12 are sleeved on both sides of the baffle 7. One end of the torsion spring 12 is fixed to the plate surface of the baffle 7, and the other end is fixed to the inner wall of the mounting groove 13. The length of the baffle 7 is greater than the distance between the lower vertical section 101 of the groove opening and the upper vertical section 105 of the groove opening, so that the baffle 7 can rotate into the second wire clamping groove 6 after being squeezed. The groove opening of the second wire clamping groove 6 opens, and the wire 23 enters the second wire clamping groove 6. After the pressure is released, when the baffle 7 is reset due to the action of the torsion spring 12, the upper end of the baffle 7 abuts against the inner wall of the upper vertical section 105 of the groove opening. By reasonably setting the distance between the base section 102 and the top plate section 104 of the cable tray, and selecting a suitable size wire 23, the wire 23 can be positioned outside the moving trajectory of the baffle 7, thus avoiding interference from the baffle 7 on the reset of the wire 23.

[0032] The second clamping groove 6 has a groove 14 on its groove wall that corresponds to the mounting groove 13. The groove 14 is used for the upper end of the baffle 7 to be inserted. The groove 14 is formed by a bottom wall and three side walls. The bottom wall is opposite to the vertical connecting section 103 of the groove wall, one of the side walls is opposite to the vertical section 101 below the groove opening, and the other two side walls are symmetrically arranged.

[0033] In this embodiment, the ground conductor 23 is first placed in the first clamping groove 2 of the splice clamp and clamped. Then, the splice clamp is installed on the gun-type operating lever. After the splice clamp is sent into the air by the gun-type operating lever, it is aligned with the conductor 23 and controlled to move horizontally toward the conductor 23. The conductor 23 squeezes the baffle 7 to open the groove of the second clamping groove 6. After the conductor 23 enters the second clamping groove 6, the baffle 7 is reset under the torque of the torsion spring 12, which restricts the conductor 23 in the second clamping groove 6 and prevents the conductor 23 in the second clamping groove 6 from coming off.

[0034] Example 2

[0035] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:

[0036] In this embodiment, as Figure 3-6As shown, the second wire clamping groove 6 has a first mounting hole 21 on the side of the groove wall and a second mounting hole 16 on the top of the groove wall. The first mounting hole 21 and the second mounting hole 16 are connected through the wire passage 17. A limit strip 20 and a spring 22 for pushing the limit strip 20 out of the first mounting hole 21 are slidably arranged in the first mounting hole 21. A pull rod 15 is arranged in the second mounting hole 16. The pull rod 15 is connected to the limit strip 20 through a traction line 19. One end of the pull rod 15 can extend out of the second mounting hole 16 and can move upward after being squeezed. The traction line 19 pulls the limit strip 20 to retract into the first mounting hole 21.

[0037] Specifically, the first mounting hole 21 is formed in the vertical connecting section 103 of the groove wall of the second wire clamping groove 6, and the first mounting hole 21 is horizontally set. The second mounting hole 16 is formed in the top plate section 104 of the groove, and the second mounting hole 16 is vertically set. Both the first mounting hole 21 and the second mounting hole 16 are blind holes and both face into the second wire clamping groove 6. The first mounting hole 21 and the second mounting hole 16 are connected by a wire passage 17 formed in the groove wall.

[0038] A spring 22 and a limiting strip 20 are provided in the first mounting hole 21. The spring 22 is sleeved on the limiting strip 20. One end of the spring 22 is fixed to the limiting strip 20, and the other end is fixed to the hole wall of the first mounting hole 21. In this embodiment, the left end of the spring 22 is fixed to the left end of the limiting strip 20, and the right end is fixed to the hole wall of the first mounting hole 21.

[0039] A traction wire 19, which is made of steel wire, is installed within the wire passage 17. One end of the traction wire 19 is connected to the end of the limiting strip 20, and the other end is connected to the middle of the pull rod 15. The uppermost end of the wire passage 17 facing the second mounting hole 16 is a vertically oriented slit opening. The traction wire 19 extends from the slit to the second mounting hole 16, and the length of the slit is not less than half the length of the pull rod 15.

[0040] To facilitate the smooth movement of the traction line 19 within the cable passage 17, several rollers 18 are installed within the cable passage 17. The traction line 19 is tensioned on the rollers 18, which are mounted on the sidewalls of the cable passage 17. The installation method of the rollers 18 is existing technology and will not be described in detail here. The rollers 18 are wheels with circumferential grooves. During use, the traction line 19 is placed within the grooves, which constrain the traction line 19 and reduce its lateral swaying during movement.

[0041] One of the rollers 18 is located at the junction of the first mounting hole 21 and the wire passage 17. The roller 18 can guide the smooth movement of the traction line 19 and also reverse the direction of the traction line 19, so that the traction line 19 connected to the end of the limit bar 20 pulls the limit bar 20 horizontally.

[0042] It should be noted that the wire passage 17 in this embodiment is an arc-shaped passage. In other embodiments of this utility model, the wire passage 17 can also be set as a straight passage. It is only necessary to ensure that the traction wire 19 is taut between the slide bar and the limiting strip 20, and that the traction wire 19 in the wire passage 17 extends upward from the first mounting hole to the second mounting hole at an angle.

[0043] In this embodiment, during use, the ground conductor 23 is first placed in the first clamping groove 2 of the splice clamp and clamped. The limiting strip 20 is then manually pressed, stretching the spring 22 and retracting the limiting strip 20. The baffle 7 is moved to abut against the vertical connecting section 103 of the groove wall. The limiting strip 20 is then released, and the spring 22 returns to its original position. At this point, the limiting strip 20 extends out of the first mounting hole 21 under the action of the spring 22, and the bottom surface of the limiting strip 20 abuts against the upper end of the baffle 7, locking the baffle 7. At this time, the opening of the second clamping groove 6 is opened. Then... The splice clamp is installed on the gun-type operating lever. After the splice clamp is sent into the air by the gun-type operating lever, it is aligned with the wire 23 and the splice clamp is controlled to move towards the wire 23. The wire 23 enters the second clamping groove 6. The splice clamp is pulled down. At this time, the wire 23 squeezes the pull rod 15. The pull rod 15 moves upward, driving the traction line 19 on it to move upward. The traction line 19 pulls the limit bar 20 to retract, releasing the lock on the baffle 7. The baffle 7 is reset under the action of the torsion spring 12 to seal the groove.

[0044] It should be noted that during use, the splice clamp can also be installed on the gun-type operating lever first, and then the ground wire 23 can be placed in the first clamping groove 2 of the splice clamp and clamped. Then, the splice clamp can be sent into the air by the gun-type operating lever. This is the existing technology and can be adapted to the actual situation.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reverse self-locking splice clamp for ground potential operation in a power distribution network, comprising a clamp body (1), the clamp body (1) having a first clamping groove (2) and a second clamping groove (6) with openings facing opposite directions, a first screw (4) passing through the upper end of the groove wall of the first clamping groove (2), the lower end of the first screw (4) being located in the first clamping groove (2) and provided with a first pressure plate (3), a second screw (9) passing through the lower end of the groove wall of the second clamping groove (6), the upper end of the second screw (9) being located in the second clamping groove (6) and provided with a second pressure plate (8), characterized in that: The second wire clamping groove (6) has an installation groove (13) on the lower edge of the groove wall. The lower end of the baffle (7) is rotatably set in the installation groove (13), and a torsion spring (12) is provided between the baffle (7) and the installation groove (13). The baffle (7) can rotate into the second wire clamping groove (6) under external pressure and seal the groove opening of the second wire clamping groove (6) after the external force disappears.

2. The reverse self-locking splicing clamp for power distribution network ground potential operation according to claim 1, characterized in that: An installation shaft (11) is provided in the installation groove (13). The lower end of the baffle (7) has a collar that can pass through the installation shaft (11). Torsion springs (12) are sleeved on the installation shafts (11) on both sides of the baffle (7). One end of the torsion spring (12) is fixed to the surface of the baffle (7), and the other end is fixed to the inner wall of the installation groove (13).

3. The reverse self-locking splicing clamp for power distribution network ground potential operation according to claim 1, characterized in that: The second clamping groove (6) has a slot (14) on its groove wall that corresponds to the mounting groove (13) above and below.

4. The reverse self-locking splicing clamp for power distribution network ground potential operation according to claim 1, characterized in that: The second wire clamping groove (6) has a first mounting hole (21) on the side of the groove wall and a second mounting hole (16) on the top of the groove wall. The first mounting hole (21) and the second mounting hole (16) are connected through the wire passage (17). A limiting strip (20) and a spring (22) for pushing the limiting strip (20) out of the first mounting hole (21) are slidably provided in the first mounting hole (21). A pull rod (15) is provided in the second mounting hole (16). The pull rod (15) is connected to the limiting strip (20) through a traction line (19). The pull rod (15) can move upward after being squeezed, and pull the limiting strip (20) to retract into the first mounting hole (21) through the traction line (19).

5. A reverse self-locking splice clamp for power distribution network ground potential operation according to claim 4, characterized in that: One end of the traction line (19) is connected to the end of the limiting strip (20), and the other end is connected to the middle of the rod of the pull rod (15).

6. A reverse self-locking splice clamp for power distribution network ground potential operation according to claim 4, characterized in that: Both the first mounting hole (21) and the second mounting hole (16) are blind holes.

7. A reverse self-locking splice clamp for power distribution network ground potential operation according to claim 4, characterized in that: The spring (22) is sleeved on the limiting strip (20), with one end of the spring (22) fixed to the limiting strip (20) and the other end fixed to the wall of the first mounting hole (21).

8. A reverse self-locking splice clamp for power distribution network ground potential operation according to claim 4, characterized in that: Several rollers (18) are provided in the cable passage (17), and the traction line (19) is wound around the rollers (18).

9. A reverse self-locking splice clamp for power distribution network ground potential operation according to claim 8, characterized in that: One of the rollers (18) is located at the junction of the first mounting hole (21) and the wire passage (17).

10. A reverse self-locking splice clamp for power distribution network ground potential operation according to claim 4, characterized in that: The traction line (19) is made of steel wire.

Images