A high voltage grounding wire clamp and working method thereof

Abstract

The present invention discloses a high-voltage grounding wire clamp and a working method thereof, comprising a first clamping part, a second clamping part, a connecting part, a screw, a threaded sleeve, a first driving rod and a second driving rod; the first clamping part and the second clamping part are hinged at both ends of the connecting part; one end of the screw is hinged to the middle position of the connecting part, and the other end is sleeved with the threaded sleeve; the first driving rods are symmetrically fixed on both sides of the threaded sleeve, and the ends of the two first driving rods away from the threaded sleeve are respectively hinged to the second driving rods, and the ends of the two second driving rods away from the first driving rod are respectively hinged to the first clamping part and the second clamping part; the opening of the wiring clamp of the present invention is located at the upper part, and the two clamping parts can be opened at the same time, and the opening is relatively large, which is convenient for docking with the bare wire and easy for disassembly and assembly, which greatly reduces the difficulty of docking the wiring clamp with the bare wire. After connection, the wiring clamp is firmly and reliably connected to the bare wire, which is safe and durable, and can meet the connection requirements of bare wires of different diameters.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment, and in particular relates to a high-voltage grounding wire clamp and a working method thereof. Background Art

[0002] During the power outage work in the substation, the grounding wire is often required to be short-circuited due to different requirements of the maintenance task to ensure the construction of the maintenance work. The current method of short-circuiting the grounding wire is to isolate the maintenance area through an insulating operating rod and a wiring clamp. The wiring clamp is installed at the end of the insulating operating rod, the grounding wire is connected to the wiring clamp, and then the wiring clamp is sent to the designated bare wire through the insulating operating rod, and the wiring clamp is clamped on the bare wire.

[0003] The inventors have found that the overhead line grounding wire clamps currently used in substations have the following problems:

[0004] 1. The weight of the insulated operating rod, wiring clamp and grounding wire is too heavy, and it is difficult to accurately deliver the wiring clamp to the designated bare wire position of the maintenance equipment and complete the installation;

[0005] 2. The openings of the high-voltage grounding wire clamps currently in use are all located on the side, and the opening stroke is small. When operating, the operator opens the opening of the clamp through the insulating operating rod and sends it to the position of the bare wire, aligns the opening of the clamp with the wire position required for the power-off equipment to be grounded, and successfully installs the grounding wire. This is very difficult, and sometimes it takes multiple hooks to successfully short-circuit the clamp and the bare wire;

[0006] 3. The current grounding method is not firm and safe. If the maintenance period is long or the weather conditions are bad, this installation method may cause the grounding wire clamp to fall off, which is very dangerous.

[0007] 4. During the installation of the ground wire, many operators may not have enough strength to accurately short-circuit the wiring clamp to the bare wire, which not only reduces work efficiency but may also create certain dangers. Summary of the invention

[0008] In order to solve the above problems, the present invention proposes a high-voltage grounding wire clamp and a working method thereof. The present invention solves the problems that the current grounding wire clamp is bulky, the installation is not reliable, the operator is insufficient in strength, and it is easy to cause loss of control when installing and removing the grounding wire, which may damage the supporting insulator; and solves the problem that the opening is difficult, the bare wire is difficult to connect with the grounding wire clamp, and the efficiency is low.

[0009] In order to achieve the above-mentioned purpose, in the first aspect, the present invention proposes a high-voltage grounding wire clamp, which adopts the following technical solution:

[0010] A high-voltage grounding wire clamp comprises a first clamping part, a second clamping part, a connecting part, a screw rod, a threaded sleeve, a first driving rod and a second driving rod;

[0011] The two ends of the connecting part are hinged with a first clamping part and a second clamping part;

[0012] One end of the screw is hinged to the middle position of the connecting part, and the other end is sleeved with a threaded sleeve;

[0013] The first driving rods are symmetrically fixed on both sides of the threaded sleeve, the ends of the two first driving rods away from the threaded sleeve are respectively hinged to the second driving rods, and the ends of the two second driving rods away from the first driving rod are respectively hinged to the first clamping part and the second clamping part.

[0014] Furthermore, the first clamping portion and the second clamping portion are both arc-shaped structures, and the arc length of the first clamping portion is greater than the arc length of the second clamping portion.

[0015] Furthermore, the connecting portion is an arc-shaped structure, and the first clamping portion, the second clamping portion and the connecting portion constitute a circular structure for clamping the cable.

[0016] Furthermore, a through hole is provided on the first clamping part, a sliding rod passes through the through hole, a head for limiting is fixed to one end of the sliding rod located outside the first clamping part, and a pressing part is fixed to one end of the sliding rod located inside the first clamping part.

[0017] Furthermore, the diameter of the through hole formed on the first clamping portion is larger than the diameter of the sliding rod, a spring is sleeved on the sliding rod, and two ends of the spring are respectively in contact with the outer side of the pressing portion and the inner side of the first clamping portion.

[0018] Furthermore, the pressing portion is an arc-shaped structure.

[0019] Furthermore, a connecting rod is fixed to one end of the screw rod away from the connecting portion.

[0020] Furthermore, a limiting groove is provided on the threaded sleeve, and a limiting block is fixed on the connecting rod via a bearing; the limiting block is slidably arranged in the limiting groove; and the limiting groove is a long hole.

[0021] Furthermore, a wiring hole is provided on the connecting portion.

[0022] In order to achieve the above-mentioned purpose, in a second aspect, the present invention also proposes a high-voltage grounding wire clamp working method, which adopts the following technical solution:

[0023] A high-voltage grounding wire clamp working method, using the high-voltage grounding wire clamp as described in the first aspect, comprising:

[0024] The connecting rod is rotated to drive the screw rod to rotate, and the threaded sleeve is driven to move downward, and driven by the first driving rod and the second driving rod, the first clamping part and the second clamping part are opened;

[0025] The cable is placed into the opened openings of the first clamping part and the second clamping part, and the connecting rod is rotated in the opposite direction, so that the first clamping part and the second clamping part are closed to clamp the cable.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The opening of the wiring clamp of the present invention is located at the upper part, and the two clamping parts can be opened at the same time. The opening is large, which is convenient for docking with the bare wire and easy for disassembly and assembly, greatly reducing the difficulty of docking the wiring clamp and the bare wire. After connection, the connection between the wiring clamp and the bare wire is firm and reliable, safe and durable, and can meet the connection requirements of bare wires of different diameters;

[0028] 2. In the present invention, an arc-shaped pressing part is installed on the upper part of the clamping part through a spring to ensure contact with the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the open state of Example 1 of the present invention;

[0032] Figure 3 This is a schematic diagram of the positions of through holes in Example 1 of the present invention.

[0033] Among them, 1. threaded sleeve, 2. connecting rod, 3. limit block, 4. limit groove, 5. screw, 6. first driving rod, 7. connecting part, 8. second driving rod, 9. first clamping part, 10. sliding rod, 11. head, 12. spring, 13. pressing part, 14. second clamping part, 15. wiring hole, 16. through hole. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, this embodiment provides a high-voltage grounding wire clamp, including a first clamping portion 9, a second clamping portion 14, a connecting portion 7, a screw rod 5, a threaded sleeve 1, a first driving rod 6 and a second driving rod 8;

[0037] The two ends of the connecting portion 7 are hinged with a first clamping portion 9 and a second clamping portion 14;

[0038] One end of the screw rod 5 is hinged to the middle position of the connecting portion 7, and the other end is sleeved with a threaded sleeve 1;

[0039] The first driving rods 6 are symmetrically fixed on both sides of the threaded sleeve 1, and the ends of the two first driving rods 6 away from the threaded sleeve 1 are respectively hinged to the second driving rods 8, and the ends of the two second driving rods 8 away from the first driving rod 6 are respectively hinged to the first clamping part 9 and the second clamping part 14.

[0040] It can be understood that when the screw 5 rotates, the threaded sleeve 1 can move up and down on the screw 5, thereby driving the first driving rod 6 to move up and down; Figure 2 As shown, when the second driving rod 8 is driven by the first driving rod 6 to move downward, the first clamping part 9 and the second clamping part 14 are opened, and the opening is facing upward, which is convenient for the operator to place the cable in the clamping area; when the cable is placed in the clamping area, the second driving rod 8 can move upward under the drive of the first driving rod 6, and the first clamping part 9 and the second clamping part 14 are closed to clamp and fix the cable.

[0041] Both ends of the second driving rod 8 can be hinged to the first driving rod 6 and the clamping part by conventional hinges such as axle pins; one end of the screw rod 5 is hinged to the middle position of the connecting part 7, and a bearing placement hole can be opened in the middle position of the connecting part 7. The outer ring of the bearing is fixed in the bearing placement hole by welding or interference connection, and the end of the screw rod 5 can be fixed in the inner ring of the bearing by welding or interference connection, thereby achieving the purpose of hinged / rotational connection between one end of the screw rod 5 and the middle position of the connecting part 7.

[0042] In order to improve stability, the rotation angle of the second drive rod 8 and the first drive rod 6 at the hinge can be limited, so that the rotation angle of the second drive rod 8 around the first drive rod 6 is within two extreme angle ranges when the first clamping part 9 and the second clamping part 14 are opened and closed. Specifically, this can be achieved by fixing two limit blocks on the first drive rod 6.

[0043] In this embodiment, the first clamping portion 9 and the second clamping portion 14 are both arc-shaped structures, and the arc length of the first clamping portion 9 is greater than the arc length of the second clamping portion 14; specifically, the inner sides of the arcs of the first clamping portion 9 and the second clamping portion 14 are arranged relatively to each other, and the arc radii of the two arcs can be equal.

[0044] In this embodiment, the connecting portion 7 is an arc-shaped structure, and the first clamping portion 9, the second clamping portion 14 and the connecting portion 7 constitute a circular structure for clamping cables.

[0045] In this embodiment, a through hole 16 is opened on the first clamping part 9, and a sliding rod 10 passes through the through hole 16. The sliding rod 10 is located at one end of the outer side of the first clamping part 9 and is fixed with a head 11 for limiting. The head 11 is a limiting block. The sliding rod 10 is located at one end of the inner side of the first clamping part 9 and is fixed with a clamping part 13. Specifically, the sliding rod 10 is coaxially arranged with the screw rod 5 to ensure that the clamping part 13 is located directly above.

[0046] In this embodiment, the diameter of the through hole 16 provided on the first clamping portion 9 is larger than the diameter of the sliding rod 10, and a spring 12 is sleeved on the sliding rod 10, and the two ends of the spring 12 are respectively in contact with the outer side of the clamping portion 7 and the inner side of the first clamping portion 7; when the first clamping portion 9 and the second clamping portion 14 are closed, when the clamping portion 13 clamps the cable, it can be adaptively adjusted according to the diameter of the cable under the action of the spring 12, thereby improving flexibility; the clamping portion 13 is an arc-shaped structure, which matches the round cable.

[0047] In this embodiment, a connecting rod 2 is fixed to one end of the screw rod 5 away from the connecting portion 7; the connecting rod 2 is also connected to an insulating rod and an operating handle, which are conventional settings and will not be described in detail here.

[0048] A limiting groove 4 is provided on the threaded sleeve 3, and a limiting block 3 is fixed on the connecting rod 2 through a bearing; the limiting block 3 is slidably arranged in the limiting groove 4; the limiting groove 4 is a long hole; the setting of the limiting block 3 and the limiting groove 4 limits the up and down movement range of the threaded sleeve 1, plays a limiting role, and combined with the rotation angle limitation of the second driving rod, the maximum opening angle of the first clamping part 9 and the second clamping part 14 is achieved on the basis of ensuring stability.

[0049] A bearing can be immediately sleeved on the portion of the connecting rod 2 inside the threaded sleeve 3, the inner ring of the bearing is fixed to the connecting rod 2, and the limit block 3 is fixed on the outer ring of the bearing; this ensures that when the limit block 3 makes axial movement with the connecting rod 2, it can rotate around the connecting rod 2, ensuring the sliding of the limit block 3 in the limit groove 4; in order to avoid the bearing occupying space, a circumferential groove can be provided on the connecting rod 2, and the bearing is sleeved in the circumferential groove to ensure that the outer ring diameter of the bearing is not greater than the diameter of the connecting rod 2, avoiding the bearing occupying too much space in the circumferential direction.

[0050] like Figure 1As shown, a wiring hole 15 is provided on the connecting portion; specifically, the connecting portion between the first clamping portion 9 and the second clamping portion 14 is located on the side, and the wiring hole 15 for connecting the ground wire is located on the connecting portion 7, and is located on the same side as the connecting portion between the first clamping portion 9 and the second clamping portion 14. After the wiring clamp is hung, if it is rotated by force, the connecting portion between the first clamping portion 9 and the second clamping portion 14 will rotate downward but not upward, thereby ensuring a firm and reliable connection.

[0051] Embodiment 2:

[0052] This embodiment provides a high-voltage grounding wire clamp working method, which uses the high-voltage grounding wire clamp as described in Embodiment 1, including:

[0053] The operator can rotate the connecting rod 2 by operating the handle and the insulating rod to drive the screw 5 to rotate, and the threaded sleeve 1 moves downward under the drive of the screw 5. Driven by the first driving rod 6 and the second driving rod 8, the first clamping part 9 and the second clamping part 14 open;

[0054] Put the cable into the opened openings of the first clamping part 9 and the second clamping part 14, rotate the connecting rod 2 in the opposite direction, and the first clamping part 9 and the second clamping part 14 are closed to clamp the cable.

[0055] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A high voltage grounding wire clamp, characterized in that: It includes a first clamping part, a second clamping part, a connecting part, a screw rod, a threaded sleeve, a first driving rod and a second driving rod; The two ends of the connecting part are hinged with a first clamping part and a second clamping part; One end of the screw is hinged to the middle position of the connecting part, and the other end is sleeved with a threaded sleeve; The first driving rods are symmetrically fixed on both sides of the threaded sleeve, the ends of the two first driving rods away from the threaded sleeve are respectively hinged to the second driving rods, and the ends of the two second driving rods away from the first driving rod are respectively hinged to the first clamping part and the second clamping part; The first clamping portion and the second clamping portion are both arc-shaped structures, and the arc length of the first clamping portion is greater than the arc length of the second clamping portion; the arc inner sides of the first clamping portion and the second clamping portion are arranged opposite to each other, and the arc radii of the two arcs are equal; The connecting portion is provided with a wiring hole; A through hole is formed on the first clamping part, a slide rod passes through the through hole, a head for limiting is fixed to one end of the slide rod located outside the first clamping part, and a pressing part is fixed to one end of the slide rod located inside the first clamping part; The diameter of the through hole on the first clamping part is larger than the diameter of the sliding rod, and a spring is sleeved on the sliding rod, and two ends of the spring are in contact with the outer side of the pressing part and the inner side of the first clamping part respectively; when the first clamping part and the second clamping part are closed and the pressing part presses the cable, the spring is used to perform adaptive adjustment according to the diameter of the cable; When the screw is rotated, the threaded sleeve moves up and down on the screw, driving the first driving rod to move up and down; when the second driving rod is driven by the first driving rod to move downward, the first clamping part and the second clamping part are opened, with the opening facing upward, and the operator places the cable in the clamping area; after the cable is placed in the clamping area, the second driving rod moves upward under the drive of the first driving rod, and the first clamping part and the second clamping part are closed to clamp and fix the cable; The rotation angle of the hinged joint between the second drive rod and the first drive rod is limited so that the rotation angle of the second drive rod around the first drive rod is within two extreme angle ranges when the first clamping part and the second clamping part are opened and closed; A connecting rod is fixed to one end of the connecting part; a limiting groove is provided on the threaded sleeve, and a limiting block is fixed on the connecting rod through a bearing; the limiting block is slidably arranged in the limiting groove; the limiting groove is a long hole; the setting of the limiting block and the limiting groove limits the up and down movement range of the threaded sleeve and plays a limiting role, which is combined with the rotation angle limitation of the second driving rod to achieve the maximum opening angle of the first clamping part and the second clamping part on the basis of ensuring stability.

2. A high voltage grounding wire clamp as claimed in claim 1, characterized in that: The connecting portion is an arc-shaped structure, and the first clamping portion, the second clamping portion and the connecting portion constitute a circular structure for clamping a cable.

3. A high voltage grounding wire clamp as claimed in claim 1, characterized in that: The pressing portion is an arc-shaped structure.

4. A high voltage grounding wire clamp working method, characterized in that: A high voltage grounding wire clamp as described in any one of claims 1 to 3 is used, comprising: The connecting rod is rotated to drive the screw rod to rotate, and the threaded sleeve is driven to move downward, and driven by the first driving rod and the second driving rod, the first clamping part and the second clamping part are opened; Put the cable into the opened openings of the first clamping part and the second clamping part, rotate the connecting rod in the opposite direction, close the first clamping part and the second clamping part, and clamp the cable; The first clamping portion and the second clamping portion are both arc-shaped structures, and the arc length of the first clamping portion is greater than the arc length of the second clamping portion; the arc inner sides of the first clamping portion and the second clamping portion are arranged opposite to each other, and the arc radii of the two arcs are equal; The connecting portion is provided with a wiring hole; A through hole is formed on the first clamping part, a slide rod passes through the through hole, a head for limiting is fixed to one end of the slide rod located outside the first clamping part, and a pressing part is fixed to one end of the slide rod located inside the first clamping part; The diameter of the through hole on the first clamping part is larger than the diameter of the sliding rod, and a spring is sleeved on the sliding rod, and two ends of the spring are in contact with the outer side of the pressing part and the inner side of the first clamping part respectively; when the first clamping part and the second clamping part are closed and the pressing part presses the cable, the spring is used to perform adaptive adjustment according to the diameter of the cable; When the screw is rotated, the threaded sleeve moves up and down on the screw, driving the first driving rod to move up and down; when the second driving rod is driven by the first driving rod to move downward, the first clamping part and the second clamping part are opened, with the opening facing upward, and the operator places the cable in the clamping area; after the cable is placed in the clamping area, the second driving rod moves upward under the drive of the first driving rod, and the first clamping part and the second clamping part are closed to clamp and fix the cable; The rotation angle of the hinged joint between the second drive rod and the first drive rod is limited so that the rotation angle of the second drive rod around the first drive rod is within two extreme angle ranges when the first clamping part and the second clamping part are opened and closed; A connecting rod is fixed to one end of the connecting part; a limiting groove is provided on the threaded sleeve, and a limiting block is fixed on the connecting rod through a bearing; the limiting block is slidably arranged in the limiting groove; the limiting groove is a long hole; the setting of the limiting block and the limiting groove limits the up and down movement range of the threaded sleeve and plays a limiting role, which is combined with the rotation angle limitation of the second driving rod to achieve the maximum opening angle of the first clamping part and the second clamping part on the basis of ensuring stability.

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