Strain clamp crimping structure

Abstract

The invention discloses a strain clamp crimping structure which sequentially comprises a strain clamp, an aluminum stranded wire, a wedge-shaped wire clamping groove and a steel core from outside to inside in the radial direction. The whole wedge-shaped wire clamping groove is of a circular truncated cone structure, a through hole is axially formed in the wedge-shaped wire clamping groove, and the steel core is sleeved with the wedge-shaped wire clamping groove. A plurality of wire clamping grooves are evenly distributed in the outer surface of the wedge-shaped wire clamping groove, the aluminum stranded wire is divided into an inner part and an outer part after being forked, the inner layer part evenly abuts against the interior of each wire clamping groove, and the other part is evenly distributed on the outer side of the inner layer part. The strain clamp, the wedge-shaped wire clamping groove and the aluminum stranded wire are in oblique compression joint by adopting a forming die forging process; and a gap between the wire clamping groove and the aluminum stranded wire of the outer layer part is filled with filler. The problem of slippage of the steel anchor and the strain clamp can be solved, the heat container can be additionally arranged in the material, the heat resistance of the material is improved, heating of the strain clamp is effectively reduced, meanwhile, the wedge-shaped wire clamping groove can play a role in preventing rainwater and other corrosive liquid from flowing backwards into the clamp, and the influence of corrosion on the strain clamp is reduced.

Description

Technical Field

[0001] The invention relates to the field of electrical engineering, in particular to a tension wire clamp crimping structure. Background Art

[0002] Strain clamps are one of the important hardware for transmission lines. They are used to fix conductors or lightning conductors on the tension insulator strings of non-linear towers, playing the role of anchoring and conducting electricity. At present, the use of tension clamps and crimping tubes is the only means to achieve uninterrupted long-distance power transmission of ultra-high voltage transmission lines. In recent years, problems such as slippage, bulging, bending of tension clamps and aluminum stranded wires, deformation and cracking of drain plates, burning of drain plates due to poor contact, and pitting during operation have seriously affected the safe and stable operation of the power grid. The reason is that the slippage of tension clamps and transmission lines is the root cause of the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a low-heat-generating tension clamp crimping structure, which can effectively solve the problem of tension clamp and transmission line slippage during the operation of the transmission network, and even reduce the corrosion problem of the tension clamp.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A tension wire clamp crimping structure, which includes a tension wire clamp, an aluminum stranded wire, a wedge-shaped wire clamping groove, and a steel core in order from the outside to the inside in radial direction;

[0006] The wedge-shaped wire clamping groove is a truncated cone structure as a whole and has a through hole axially provided therein, and the wedge-shaped wire clamping groove is sleeved outside the steel core;

[0007] The outer surface of the wedge-shaped wire clamping groove is evenly distributed with a plurality of wire clamping grooves. The aluminum stranded wire is divided into an inner and an outer part after bifurcation. The inner part is evenly abutted in each wire clamping groove, and the other part is evenly distributed on the outer side of the inner part.

[0008] The wedge-shaped wire clamping groove extends into the end of the tension clamp;

[0009] The tension clamp, wedge-shaped wire slot and aluminum stranded wire are obliquely crimped by using a fetal membrane forging process;

[0010] A filler is arranged in the gap between the wire clamping groove and the aluminum stranded wire of the outer layer part.

[0011] Furthermore, the angle θ between the generatrix of the truncated cone structure and the lower bottom surface satisfies: 90°>θ≥80°.

[0012] Furthermore, the wire clamping groove is an arc-shaped groove.

[0013] Furthermore, the filler may be made of soft copper or soft aluminum powder.

[0014] Furthermore, the inner diameter of the connecting section of the tension clamp is larger than the outer diameter of the aluminum stranded wire.

[0015] Furthermore, the inner diameter of the wedge-shaped wire groove is greater than the diameter of the steel core.

[0016] Furthermore, the material of the wedge-shaped wire trough may be any one of soft copper, soft aluminum or steel.

[0017] In the above technical solution, the present invention provides a wedge-shaped tension clamp crimping structure, which has the following beneficial effects:

[0018] The patent of the present invention adopts a low-heat wedge-shaped tension clamp crimping structure, which can effectively solve the problem of slipping of steel anchors and tension clamps, and can also add a heat container in the material, increase the heat capacity of the material, improve the heat resistance of the material, and effectively reduce the heat generation of the tension clamp. At the same time, the wedge-shaped structure can prevent corrosive liquids such as rainwater from flowing back into the interior of the clamp, reduce the impact of corrosion on the tension clamp, and extend the service life of the tension clamp. This method is simple to operate, stable and reliable to install, and can greatly extend the service life of the tension clamp, providing a guarantee for the stable and safe operation of overhead transmission lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic structural diagram of the tension clamp crimping structure provided by the present invention;

[0021] Figure 2 A schematic diagram of the structure of the aluminum stranded wire and the tension clamp provided by the present invention after crimping;

[0022] Figure 3 A schematic diagram of the structure of the aluminum stranded wire provided by the present invention;

[0023] Figure 4 A schematic diagram of the front view structure of the wedge-shaped wire clamping trough provided by the present invention;

[0024] Figure 5 A schematic side structural diagram of the wedge-shaped wire trough provided by the present invention.

[0025] In the figure: a tension clamp 1, an aluminum stranded wire 3, a wedge-shaped wire duct 2, a steel core 4, a filler 6, and a wire duct 21. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The purpose of the present invention is to provide a low-heat wedge-shaped tension clamp crimping structure, which can effectively solve the problems of tension clamp and transmission line slippage and tension clamp heating during the operation of the transmission network, and even reduce the corrosion problem of the tension clamp.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 -5 is a tension clamp crimping structure provided in the embodiment of the present invention, which includes, radially from the outside to the inside: a tension clamp 1, a wedge-shaped wire groove 2, an aluminum stranded wire 3 preferably of a steel core aluminum stranded wire type, and a steel core 4.

[0030] The wedge-shaped wire clamping groove 2 is a truncated cone structure as a whole and has a through hole axially provided therein. The wedge-shaped wire clamping groove 2 is sleeved on the outside of the steel core 4 .

[0031] The outer surface of the wedge-shaped wire clamping groove 2 is evenly distributed with a plurality of wire clamping grooves 21. The aluminum stranded wire 3 is divided into two parts after bifurcation, wherein the inner layer part is evenly abutted in each wire clamping groove 21, and the other part is evenly distributed outside the inner layer part. The direction of the wire clamping groove 21 is along the generatrix of the truncated cone structure and passes through the outer surface of the truncated cone structure.

[0032] The wedge-shaped wire groove 2 extends into the end of the tension clamp 1, the lower bottom surface of the wedge-shaped wire groove 2, that is, the thick end is located inside the tension clamp 1 compared to the thin end, and the upper bottom surface of the wedge-shaped wire groove 2 is located at the end surface of the tension clamp 1.

[0033] The tension clamp 1, the wedge-shaped wire trough 2 and the aluminum stranded wire 3 are obliquely crimped by adopting the fetal membrane forging process.

[0034] A filler is provided in the gap between the wire clamping groove 21 and the aluminum stranded wire 3 of the outer layer.

[0035] Preferably, the included angle θ between the generatrix of the truncated cone structure and the lower bottom surface satisfies: 90°>θ≥80°.

[0036] Preferably, the wire clamping groove 21 is an arc-shaped groove, so that the inner surface of each wire of the inner layer of the aluminum stranded wire 3 can be closely attached to the arc-shaped groove.

[0037] Preferably, the filler can be made of soft copper or soft aluminum powder, which is denser and more conducive to heat dissipation.

[0038] Preferably, Figure 1The inner diameter θ1 of the connection section of the tension clamp 1 is larger than the outer diameter of the aluminum stranded wire 3. This facilitates installation before crimping, and after crimping, the connection section of the tension clamp 1 is sealed to prevent water from entering.

[0039] Preferably, the inner diameter of the wedge-shaped wire clamping groove 2 is larger than the diameter of the steel core 4, and can be slightly larger than 0.1-0.5 mm.

[0040] Preferably, the material of the wedge-shaped wire trough can be any one of soft copper, soft aluminum or steel. The material of the wedge-shaped wire trough can be any material that can reduce the heat generation of the part.

[0041] The wedge-shaped wire slot 2 is sleeved on the outer surface of the steel core 1, and the aluminum stranded wire 3 is evenly distributed on the slot surface after bifurcation, and the remaining aluminum stranded wires are evenly distributed on the outermost side of the wire slot. The tension clamp, the wedge-shaped wire slot 2 and the steel wire aluminum stranded wire are obliquely crimped using the tire membrane forging process. The wedge-shaped wire slot structure is large at one end and small at the other end, with an oblique transition, and the angle θ between the two is 0-10°; the wire slot is an arc-shaped groove, and the number and size of the wire slot can be flexibly adjusted according to actual needs; the gap between the wire slot and the aluminum stranded wire can be tightly filled with waste or powder.

[0042] The gap between the wire duct and the aluminum stranded wire can be tightly filled with waste or powder such as soft copper and soft aluminum.

[0043] The wedge-shaped wire groove can be cast or machined;

[0044] The tension clamp, wedge-shaped wire trough, and aluminum stranded wire use the membrane forging oblique crimping method to tightly crimp the steel core aluminum stranded wire and the tension clamp at a wedge angle. This implementation increases the pulling force of the tension clamp and the transmission line, avoiding the risk of the two slipping off. At the same time, by adding a wedge-shaped wire trough and using low-resistance materials, the heat generation at the crimping position is greatly reduced. In addition, the addition of the wedge-shaped structure and filler prevents the infiltration of rainwater and the like, extending the service life of the tension clamp.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tension clamp crimping structure, characterized in that: The device comprises, from outside to inside in radial direction, a tension wire clamp (1), an aluminum stranded wire (3), a wedge-shaped wire slot (2), and a steel core (4); The wedge-shaped wire-holding groove (2) is a truncated cone structure as a whole and has a through hole axially provided therein; the wedge-shaped wire-holding groove (2) is sleeved outside the steel core (4); The outer surface of the wedge-shaped wire clamping groove (2) is evenly distributed with a plurality of wire clamping grooves (21); the aluminum stranded wire (3) is divided into two parts, an inner layer and an outer layer, after bifurcation; the inner layer part evenly abuts against each wire clamping groove (21), and the other part is evenly distributed on the outer side of the inner layer part; The wedge-shaped wire clamping groove (2) extends into the end of the tension wire clamp (1); The tension wire clamp (1), the wedge-shaped wire clamping groove (2) and the aluminum stranded wire (3) are obliquely crimped by using a fetal membrane forging process; A filler is provided in the gap between the wire clamping groove (21) and the aluminum stranded wire (3) of the outer layer.

2. A tension clamp crimping structure according to claim 1, characterized in that: The included angle θ between the generatrix of the truncated cone structure and the lower bottom surface satisfies: 90°>θ≥80°.

3. A tension clamp crimping structure according to claim 1, characterized in that: The wire clamping groove (21) is an arc-shaped groove.

4. A tension clamp crimping structure according to claim 1, characterized in that: The filler may be powder of soft copper or soft aluminum.

5. A tension clamp crimping structure according to claim 1, characterized in that: The inner diameter of the connection section of the tension clamp (1) is greater than the outer diameter of the aluminum stranded wire (3).

6. A tension clamp crimping structure according to claim 1, characterized in that: The inner diameter of the wedge-shaped wire-holding groove (2) is greater than the diameter of the steel core (4).

7. A tension clamp crimping structure according to claim 1, characterized in that: The material of the wedge-shaped wire clamping trough (2) may be any one of soft copper, soft aluminum or steel.

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