Pre-twisted cable damper

Abstract

The utility model discloses a pre-twisted cable damper, which comprises a cable clamp for hanging a left hammerhead and a right hammerhead on a cable, the cable clamp comprises a fork body, the top of the fork body is a V-shaped fork, a V-shaped groove is formed in the V-shaped fork, and a rope hole is formed in the bottom of the fork body; the cable is arranged in the V-shaped fork of the fork body after being wound with N strands of armor rods, a plurality of pressing strip pre-twisted wires are arranged in the V-shaped groove in a penetrating manner, and the pressing strip pre-twisted wires are spirally wound on the armor rods to fixedly connect the cable clamp to the cable; the left hammerhead and the right hammerhead are connected through a steel twisted rope, and the steel twisted rope is fixed in a rope hole of the fork body in a penetrating mode. The wire clamp and the armor rod are made of non-magnetic aluminum alloy materials. The utility model has the advantages of good protection effect, convenient installation and operation and good anti-loosening effect, and can further improve the operation quality and service life of the line; an operator can mount and dismount the device at high altitude without any tool, and the device is more convenient to change the mounting position.

Description

Technical Field

[0001] The utility model relates to an electric power fitting, which is a protective tool for overhead power lines, in particular to a pre-twisted cable anti-vibration hammer for preventing cable vibration. Background Art

[0002] Traditional anti-vibration hammers are fixed to cables with bolts, such as the utility model patent "Anti-vibration Hammer for ADSS Optical Cable" with authorization announcement number CN2682435Y. When installing the wire clamp at high altitude, a torque wrench must be equipped. Since it is manually operated, it is easy to have excessive or insufficient torque.

[0003] If the torque is too large, it will cause damage to the cable or bolts. If the torque is too small, the gripping force between the anti-vibration hammer and the cable cannot meet the standard. Even if the gripping force between the anti-vibration hammer and the cable meets the requirement during installation, as the cable and anti-vibration hammer vibrate during line operation, the stress of the cable and the bolts relaxes, and the gripping force between the cable and the anti-vibration hammer decreases, causing the anti-vibration hammer wire clamp to loosen. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to propose a pre-twisted cable anti-vibration hammer which ensures connection stability and reliability and is easy to install and disassemble.

[0005] The pre-twisted cable anti-vibration hammer capable of solving the above technical problems comprises a technical solution comprising hanging a left hammer head and a right hammer head on a wire clamp on the cable, the difference being that:

[0006] 1. The wire clamp comprises a fork body with a "V"-shaped fork at the top, a "V"-shaped groove is provided inside the "V"-shaped fork, and a rope hole is provided at the bottom of the fork body;

[0007] 2. After N strands of protective wire are wound around the cable, they are placed in the "V"-shaped fork of the fork body. A plurality of pre-twisted wires of the compression strip are passed through the "V"-shaped groove. The pre-twisted wires of the compression strip are spirally wound around the protective wire to fix the wire clamp on the cable.

[0008] 3. The left hammer head and the right hammer head are connected by a steel stranded rope, and the steel stranded rope is passed through and fixed in the rope hole of the wire clamp.

[0009] Furthermore, one hammer head has a large mass and the other hammer head has a small mass, and the length of the steel strand between the large-mass hammer head and the wire clamp is shorter than the length of the steel strand between the small-mass hammer head and the wire clamp.

[0010] Furthermore, the outer shape of each hammer head is in the shape of a tuning fork.

[0011] Furthermore, the wire clamp and the wire protection wire are both made of non-magnetic aluminum alloy material.

[0012] Beneficial effects of the utility model:

[0013] 1. The utility model pre-twisted cable anti-vibration hammer has good protection effect, can further improve the operation quality and life of the line, is easy to install and operate, and has good anti-loosening effect.

[0014] 2. In the structure of the utility model, the wire protection bar and the wire clamp in contact with the cable are made of non-magnetic aluminum alloy material, and there is no hysteresis and eddy current loss.

[0015] 3. During operation, the utility model will not slip, loosen or affect the anti-vibration effect.

[0016] 4. The utility model is also very convenient to operate. Operators can install and disassemble it at high altitude without any tools, which is more convenient when changing the installation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an implementation method of the utility model.

[0018] Figure 2 for Figure 1 A-A section view in.

[0019] Figure number identification: 1. Left hammer; 2. Right hammer; 3. Cable; 4. Wire clamp; 4-1. "V" groove; 4-2. Rope hole; 5. Pre-twisted wire of compression strip; 6. Steel strand. 7. Protective wire DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the implementation modes shown in the accompanying drawings.

[0021] The utility model pre-twisted cable anti-vibration hammer comprises a wire clamp 4 for hanging a left hammer head 1 and a right hammer head 2 on a cable 3, and the shape of each hammer head is a tuning fork shape, such as Figure 1 shown.

[0022] The wire clamp 4 (made of non-magnetic aluminum alloy material) includes left and right vertical fork bodies, the top of the fork body is a "V"-shaped fork, the inside of the "V"-shaped fork is formed with a "V"-shaped groove 4-1, and the bottom of the fork body is formed with a rope hole 4-2. Figure 1 , Figure 2 shown.

[0023] A section of protective wire 7 (composed of more than ten strands of non-magnetic aluminum alloy wire, the specific number of which depends on the cable diameter of the cable 3) is wound around the cable 3 and then placed in the "V"-shaped fork of the fork body, and four compression strip pre-twisted wires 5 are inserted into the "V"-shaped groove 4-1 of the "V"-shaped fork. The compression strip pre-twisted wires 5 exposed on the left and right sides of the "V"-shaped fork are manually spirally wound around the protective wire 7 to bind the wire clamp 4 and the cable 3 together. The binding length of the compression strip pre-twisted wire 5 is 600mm. Figure 1 shown.

[0024] A section of steel strand 6 is passed through and fixed in the rope hole 4-2 of the fork body. The left and right ends of the steel strand 6 are respectively connected to the left hammer 1 and the right hammer 2. The mass of the left hammer 1 is greater than the mass of the right hammer 2. The length of the steel strand 6 between the heavy hammer and the wire clamp 4 is shorter than the length of the steel strand between the light hammer and the wire clamp 4. Figure 1 shown.

[0025] The implementation of the utility model does not require any tools and can be completed by hand, and the installation is convenient and quick; a protective wire 7 is added between the "V"-shaped fork of the wire clamp 4 and the cable 3 as a protective layer, and the protective layer plays an important role in protecting the cable 3 from wear; the compression strip pre-twisted wire 5 ensures a continuous, stable and reliable binding gripping force between it and the cable 3, and the binding gripping force between the compression strip pre-twisted wire 5 and the cable 3 is evenly dispersed in a length area of ​​600mm, avoiding stress concentration on the cable connection.

Claims

1. A pre-twisted cable anti-vibration hammer, comprising a wire clamp (4) for suspending a left hammer head (1) and a right hammer head (2) on a cable (3), characterized in that: The wire clamp (4) comprises a fork body with a "V"-shaped fork at the top, a "V"-shaped groove (4-1) is provided inside the "V"-shaped fork, and a rope hole (4-2) is provided at the bottom of the fork body; The cable (3) is wound with N strands of protective wire (7) and then placed in a "V"-shaped fork of the fork body; a plurality of compression strip pre-twisted wires (5) are inserted into the "V"-shaped groove (4-1); the compression strip pre-twisted wires (5) are spirally wound on the protective wire (7) to securely connect the wire clamp (4) to the cable (3); The left hammer head (1) and the right hammer head (2) are connected by a steel twisted rope (6), and the steel twisted rope (6) is passed through and fixed in a rope hole (4-2) of the fork body.

2. The pre-twisted cable anti-vibration hammer according to claim 1, characterized in that: One hammer head has a large mass and the other hammer head has a small mass, and the length of the steel strand (6) between the large-mass hammer head and the wire clamp (4) is shorter than the length of the steel strand (6) between the small-mass hammer head and the wire clamp (4).

3. The pre-twisted cable anti-vibration hammer according to claim 2, characterized in that: The outer shape of each hammer head is in the shape of a tuning fork.

4. The pre-twisted cable anti-vibration hammer according to any one of claims 1 to 3, characterized in that: The wire clamp (4) and the wire protection wire (7) are both made of non-magnetic aluminum alloy material.

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