CN203415931U - Anti-water-accumulation strain clamp - Google Patents

Abstract

The utility model provides a water-resistant strain clamp, which is arranged at the terminal of an overhead power transmission line for anchoring wires and maintaining their electrical and mechanical properties, including steel anchors, aluminum tubes and drainage plates; The steel anchor is arranged at one end of the aluminum tube, and is connected with the wire arranged in the aluminum tube; the improvement is that the side wall of the aluminum tube is provided with a grease injection hole. Compared with the prior art, the anti-accumulated water tension clamp provided by the utility model can prevent rainwater from penetrating into the tension clamp to form accumulated water, and ensure the safe and stable operation of the transmission line; the anti-accumulated effect is good, the structure is simple, and it is easy to install, Operation; good economic performance, suitable for large-scale promotion and use.

Description

A water-resisting strain clamp

technical field

The utility model relates to a tension-resistant wire clamp, in particular to a water-logging-resistant tension wire clamp for overhead power transmission lines.

Background technique

In recent years, with the continuous acceleration of China's electric power development, China's power grid has also developed rapidly. The operating voltage level of the power grid system has continued to increase, and the network scale has also continued to expand. Build a strong and smart grid and initially realize the goal of building a world-class power grid.

The tension clamp is used to fix the conductor or lightning conductor on the tension insulator string of the non-linear tower, and it acts as an anchor. It is also used to fix the guy wire of the guy tower. It is an important fitting in the transmission line.

Most of the current transmission line conductors use steel-cored aluminum stranded wires, and large-span sections often use steel-cored aluminum alloy stranded wires. When the wires are crimped with tension clamps, the steel cores cannot be compressed, and there are gaps between the steel cores, which are prone to water seepage. aisle. There is a stepped protruding part at the end of the steel anchor of the strain clamp, and the aluminum tube at the end is directly pressed on the steel anchor tube. After crimping, it is relatively dense, and the end of the pull ring side of the strain clamp is dense. When the tension string is hung upside down, the wire at the tension clamp has a large elevation angle. After a long time of operation, rainwater seeps into the cavity (non-pressed area) of the clamp along the seepage channel. Because the end of the strain-resistant clamp is dense, the accumulated water cannot flow out, which will cause water to accumulate in the cavity of the clamp. When the temperature drops to the freezing point, the accumulated water freezes and expands, resulting in longitudinal cracks or bulges in the aluminum tube of the clamp at the cavity of the crimping tube.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a water-resisting strain clamp, which prevents rainwater from penetrating into the strain clamp and ensures the normal operation of the transmission line.

The purpose of this utility model is to adopt following technical scheme to realize:

The utility model provides a water-resistant strain clamp, which is set at the terminal of the overhead transmission line, used for anchoring the wire, and maintaining its electrical and mechanical properties, including: steel anchor, aluminum tube and drainage plate; the steel anchor is arranged at one end of the aluminum tube, and is connected with the wire arranged in the aluminum tube; the improvement is that the side wall of the aluminum tube is provided with a grease injection hole.

Wherein, the aluminum tube is a cylinder with a puller on the outside of one end.

Wherein, the drainage plate is arranged on the outer wall of the aluminum tube, and the other end is connected with the drainage clip.

Wherein, one end of the steel anchor is a circular ring or a round hole, and the other end is a stepped cylinder, and a hole is arranged in the cylinder at the farthest end along the axis direction, and a hole is provided in the middle and outer side of the steel anchor to match the aluminum tube. Matching ribs.

Wherein, the wire is an aluminum steel-cored wire, a steel-cored aluminum alloy wire, a steel-cored aluminum alloy wire or a steel-cored aluminum alloy wire, including a steel core and a conductor; the steel core is arranged on the steel anchor In the hole, the steel core and the steel anchor are integrated by crimping.

Wherein, the wire is an aluminum alloy cored aluminum stranded wire, an aluminum alloy core formed aluminum stranded wire, including an aluminum alloy core and an aluminum wire; the aluminum alloy core is arranged in the hole of the steel anchor, and the aluminum alloy core It is integrated with the steel anchor through crimping.

Wherein, the aluminum tube and the wire are integrated by crimping.

Wherein, the number of the grease injection hole is at least one, which is arranged in the crimping area of the aluminum tube, and the grease injection hole is provided with an aluminum cover.

Wherein, the electric grease is arranged in the cavity formed by the steel anchor, the aluminum tube and the wire through the grease injection hole.

Compared with the prior art, the beneficial effects achieved by the utility model are:

1. The water-resistant tension clamp provided by the utility model can prevent rainwater from penetrating into the tension clamp to form water accumulation, and ensure the safe and stable operation of the transmission line.

2. The water-logging-proof and tension-resistant clamp provided by the utility model has good effect of water-logging prevention, simple structure, and easy installation and operation.

3. The water-logging and tension-resistant clamp provided by the utility model has good economic performance and is suitable for large-scale popularization and use.

4. The anti-water and tension clamp provided by the utility model adopts hydraulic crimping, the process is mature, the crimping quality is easy to be guaranteed, and the crimping problem of the wire is overcome.

5. The anti-water and strain clamp provided by the utility model directly crimps the steel anchor and the aluminum alloy core or steel core of the wire, which greatly improves the effectiveness and stability of the steel anchor holding the wire.

6. The water-logging and strain-resistant clamp provided by the utility model adopts an aluminum tube that can not only effectively withstand the pulling force of the wire, but also be used as a conductor to conduct current well.

7. The anti-water and strain clamp provided by the utility model uses electric grease with conductivity, which can conduct current well.

Description of drawings

Fig. 1 is: a structural schematic diagram of the anti-accumulation and strain clamp provided by the utility model;

Among them: 1. Steel anchor; 2. Aluminum tube; 3. Drainage plate; 4. Grease injection hole.

Detailed ways

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the specific implementation of the utility model will be further described in detail below in conjunction with the accompanying drawings.

In this embodiment, the water-resistant strain clamp is taken as an example. As shown in Figure 1, the water-resistant strain clamp provided by the embodiment of the utility model includes: steel anchor 1, aluminum tube 2, drainage plate 3 and grease injection Hole 4; the steel anchor 1 and the steel core or aluminum alloy core of the wire are crimped as one, and set in the aluminum tube 2; the steel anchor 1 and the aluminum tube 2 are connected by threads, and crimped as one; the aluminum tube 2 and the The aluminum wire or aluminum alloy wire of the conductor is integrated by crimping; the drain plate 3 is welded on the outer wall of the aluminum tube 2 and connected with the drain clamp; the crimping area of the aluminum tube 2 is provided with a grease injection hole 4, and The number of fat holes 4 is at least one.

Before crimping the aluminum tube 2, inject power grease into the aluminum tube 2 through the grease hole 4, so that the power grease fills the cavity formed by the steel anchor 1, aluminum tube 2 and the wire, and then plug the grease hole with an aluminum cover 4. Crimp the steel anchor 1 and the aluminum tube 2, the aluminum tube 2 and the aluminum wire of the wire respectively.

After crimping, the electric grease fills the non-pressing area of the aluminum tube 2, that is, the cavity, which can prevent rainwater from pouring into the aluminum tube 2 and form water accumulation in the aluminum tube 2, thereby avoiding freezing and heaving of the accumulated water and ensuring the tension line There are no cracks or bulges in the clamp, so as to ensure the safe and stable operation of the transmission line.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible Any modification or equivalent replacement made to the specific implementation of the present utility model without departing from the spirit and scope of the present utility model shall be covered by the claims of the present utility model.

Claims (9)

1. A water-resistant strain clamp, said strain clamp is arranged at the terminal of an overhead transmission line, is used for anchoring conductors, and maintains its electrical and mechanical properties, comprising: steel anchors, aluminum tubes and drainage plates; The steel anchor is arranged at one end of the aluminum tube, and is connected with the wire arranged in the aluminum tube; it is characterized in that, the side wall of the aluminum tube is provided with a grease injection hole. 2. The anti-accumulation and strain clamp according to claim 1, characterized in that, the aluminum tube is a cylinder, and a puller is provided on the outside of one end. 3 . The anti-accumulation and strain clamp according to claim 1 , wherein the drainage plate is arranged on the outer wall of the aluminum tube, and the other end is connected to the drainage clamp. 4 . 4. The water-resistant strain clamp according to claim 1, wherein one end of the steel anchor is a ring or a round hole, the other end is a stepped cylinder, and the most distal cylinder is along the axis The direction is provided with holes, and the middle and outer sides of the steel anchor are provided with ribs matching the aluminum tube. 5. The water-resistant and strain-resistant clamp according to claim 4, wherein the wire is an aluminum-steel-cored wire, an aluminum-alloy-steel-cored wire, an aluminum-steel-cored wire or an aluminum-alloy steel-cored wire The stranded wire includes a steel core and a conductor; the steel core is arranged in the hole of the steel anchor, and the steel core and the steel anchor are integrated by crimping. 6. The water-resisting strain clamp as claimed in claim 5, wherein the wire is an aluminum alloy cored aluminum stranded wire or an aluminum alloy core formed aluminum stranded wire, including an aluminum alloy core and an aluminum wire; The aluminum alloy core is arranged in the hole of the steel anchor, and the aluminum alloy core and the steel anchor are integrated by crimping. 7. The water-logging and strain-resistant clamp according to claim 1, wherein the aluminum tube and the wire are integrated by crimping. 8. The anti-water and strain clamp according to claim 7, characterized in that the number of the grease injection hole is at least one, which is arranged in the crimping area of the aluminum tube, and the grease injection hole is provided with Aluminum cap. 9. The water-logging and tension-resistant clamp according to claim 8, characterized in that, the electric grease is arranged in the cavity formed by the steel anchor, the aluminum tube and the wire through the grease injection hole.

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