CN103490359B - A water-resisting strain clamp - Google Patents

Abstract

The invention provides a water-resistant strain clamp, which comprises: a steel anchor, an aluminum tube and a drainage plate; the steel anchor is arranged at one end of the aluminum tube and is connected with a wire arranged in the aluminum tube; its improvement The advantage 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 present invention can prevent rainwater from penetrating into the tension clamp to form accumulated water, avoid frost heaving, and ensure the safe and stable operation of the power transmission line; the anti-accumulated effect is good, the structure is simple, Easy to install and operate; good economic performance, suitable for large-scale promotion and use.

Description

A water-resisting strain clamp

technical field

The invention relates to a strain clamp, in particular to a strain clamp for preventing accumulation of water and used for an overhead power transmission line.

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. At present, power grid construction has become the main direction of my country's electric power construction. By 2020, a strong smart grid will be fully built, and the goal of building a world-class power grid will be initially realized.

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.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a waterlogging resistant strain clamp, which prevents rainwater from penetrating into the strain clamp and ensures the normal operation of the power transmission line.

The object of the present invention is to adopt following technical scheme to realize:

The present invention provides a water-resistant strain clamp, which includes: a steel anchor, an aluminum tube and a drainage plate; the steel anchor is arranged at one end of the aluminum tube, and is arranged on the The wire connection 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 prior art, the beneficial effect that the present invention reaches is:

1. The water-resistant tension clamp provided by the present invention 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 present invention has good water-logging-proof effect, simple structure, and easy installation and operation.

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

4. The anti-water and tension clamp provided by the present invention 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 present invention 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 anti-water and strain clamp provided by the present invention uses an aluminum tube that can not only effectively bear 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 present invention uses electric grease with conductivity, which can conduct current well.

Description of drawings

Figure 1 is: a structural schematic diagram of the water-logging and tension-resistant clamp provided by the present invention;

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

detailed description

The specific implementation manners of the present invention 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 present invention includes: a steel anchor 1, an aluminum tube 2, a drainage plate 3 and a 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 wire The aluminum wire or aluminum alloy wire 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 for grease injection The number of 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 power grease fills the non-pressing area of the aluminum tube 2, that is, the cavity, which can prevent rainwater from penetrating into the aluminum tube 2 to form stagnant water, thereby avoiding freezing and swelling, and ensuring that the tension clamp does not appear cracks or bulges, thereby ensuring Safe and stable operation of transmission lines.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (3)

1. A water-resistant strain clamp, said strain clamp comprising: a steel anchor, an aluminum tube and a drainage plate; said steel anchor is arranged at one end of said aluminum tube, and is arranged in said aluminum tube The wire connection; It is characterized in that the side wall of the aluminum tube is provided with a grease injection hole. One end of the steel anchor is a ring or a round hole, and the other end is a stepped cylinder. A hole is arranged in the cylinder at the farthest end along the axial direction. Convex; The aluminum tube and the wire are integrated by crimping; 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; The aluminum tube is a cylinder with a puller on the outside of one end; The drainage plate is arranged on the outer wall of the aluminum tube, and the other end is connected with the drainage clip; The electric grease is set in the cavity formed by the steel anchor, the aluminum tube and the wire through the grease injection hole. 2. The water-resistant and strain-resistant clamp according to claim 1, wherein the wire is an aluminum-steel-cored wire, a steel-cored aluminum-alloy wire, a steel-cored aluminum strand or a steel-cored aluminum alloy 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. 3. The water-resisting strain clamp according to claim 1, 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.