Power line clamp for high-voltage transmission

Abstract

The utility model discloses a high-voltage transmission power wire clamp, which comprises an annular seat, at least one wire clamp component used for clamping a steel strand is arranged on the outer edge of the annular seat along the circumferential direction of the annular seat, and the wire clamp component comprises a first arc-shaped clamping plate and a second arc-shaped clamping plate. An annular steel strand clamping hole is jointly defined by the middle of the first arc-shaped clamping plate and the middle of the second arc-shaped clamping plate, a first clamping assembly is arranged in the annular steel strand clamping hole, and a first conical anchor hole and a second conical anchor hole are symmetrically defined by the two ends of the first arc-shaped clamping plate and the two ends of the second arc-shaped clamping plate. A second clamping assembly is arranged in the first conical anchor hole in a matched mode, and a third clamping assembly is arranged in the second conical anchor hole in a matched mode. According to the utility model, the first clamping assembly is arranged in the middle of the wire clamp part, and the second clamping assembly and the third clamping assembly are symmetrically arranged at the two end parts of the wire clamp part, so that the second clamping assembly or the third clamping assembly can increase the clamping force and reduce the possibility of sliding of the steel strand when the steel strand slides due to the increase of tension; and the stability during high-voltage transmission is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric appliances, and in particular relates to a power line clamp for high-voltage transmission. Background Art

[0002] In high-voltage transmission, 1000kV UHV transmission lines are divided into 8 wires, called eight-split conductors. 750kV ultra-high voltage transmission lines, this voltage level is only used in my country's Northwest Power Grid. 750kV voltage level generally uses six-split conductors. 500kv transmission lines basically use four-split conductors, that is, one phase has four wires. 220kv mostly uses two-split conductors, which is a huge iron tower. 110kv mostly uses one stranded steel wire.

[0003] Insulators and power line clamps are often used at electric poles or towers to clamp and support steel strands. Existing power line clamps for high-voltage transmission generally use two arc-shaped clamping blocks to clamp the steel strands. This clamping method is relatively simple and its stability is difficult to ensure. In particular, ice and blocks form on the steel strands in freezing rain conditions, which increases the tension of the steel strands on the clamps and makes it easy for the steel strands to slip, which is not conducive to high-voltage transmission of the steel strands.

[0004] Based on the deficiencies in the prior art, the utility model discloses a power line clamp for high-voltage transmission, by arranging a first clamping assembly in the middle of the line clamp component, and symmetrically arranging a second clamping assembly and a third clamping assembly at both ends of the line clamp component, so that when the steel strand slips due to increased tension, the second clamping assembly or the third clamping assembly can increase the clamping force, reduce the possibility of slippage of the steel strand, and improve the stability during high-voltage transmission. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a power line clamp for high voltage transmission to solve the technical problems raised in the background technology.

[0006] The utility model provides the following technical solutions:

[0007] A power line clamp for high-voltage transmission comprises an annular seat, wherein the outer edge of the annular seat is provided with at least one wire clamp component for clamping a steel strand along its circumference, wherein the wire clamp component comprises a first arc-shaped clamping plate and a second arc-shaped clamping plate, wherein the middle parts of the first arc-shaped clamping plate and the second arc-shaped clamping plate jointly form an annular steel strand clamping hole, wherein a first clamping assembly is arranged inside the annular steel strand clamping hole, wherein the two ends of the first arc-shaped clamping plate and the second arc-shaped clamping plate symmetrically form a first conical anchor hole and a second conical anchor hole, wherein a second clamping assembly is fitted in the first conical anchor hole, and a third clamping assembly is fitted in the second conical anchor hole.

[0008] Preferably, the axial directions of the first arc-shaped clamping plate and the second arc-shaped clamping plate are both arranged parallel to the axial direction of the annular seat.

[0009] Preferably, a side surface of the first arc-shaped clamping plate away from the second arc-shaped clamping plate is connected to the outer edge of the annular seat through a connecting rod.

[0010] Preferably, the number of the wire clamp components is one, two, four, six or eight.

[0011] Preferably, the first arc-shaped clamping plate is symmetrically provided with a plurality of first connecting plates on both sides along its axial direction, and the second arc-shaped clamping plate is symmetrically provided with a plurality of second connecting plates on both sides along its axial direction, and the plurality of first connecting plates and second connecting plates are connected by fastening bolts.

[0012] Preferably, the first clamping assembly includes a first arc-shaped anti-slip protrusion and a second arc-shaped anti-slip protrusion, the first arc-shaped anti-slip protrusion is coaxially arranged on the inner side surface of the first arc-shaped clamping plate, the second arc-shaped anti-slip protrusion is coaxially arranged on the inner side surface of the second arc-shaped clamping plate, and the first arc-shaped anti-slip protrusion and the second arc-shaped anti-slip protrusion together form an annular anti-slip protrusion.

[0013] Preferably, a plurality of the annular anti-slip protrusions are provided, and the plurality of the annular anti-slip protrusions are evenly arranged at equal intervals along the axial direction of the annular steel strand clamp hole.

[0014] Preferably, the second clamping assembly includes a plurality of first anchor clips, which together form a conical anchor clip adapted to the first conical anchor hole, and a clamping hole for clamping the steel strand is provided inside the conical anchor clip along the axial direction of the first conical anchor hole.

[0015] Preferably, a plurality of third arc-shaped anti-slip protrusions are also provided on the inner side of the first anchor clip.

[0016] Preferably, the second clamping assembly also includes a first stop plate, which is arranged at one end of the first conical anchor hole away from the annular steel strand clamping hole, and the edges of the two ends of the first arc-shaped clamping plate and the second arc-shaped clamping plate are respectively provided with a plurality of bolt holes, and the first stop plate is connected to the plurality of bolt holes through a plurality of first fastening bolts, and a first through hole for allowing the steel strand to pass through is provided in the middle of the first stop plate.

[0017] Preferably, the inner diameter of the first through hole is smaller than the maximum end diameter of the conical anchor clip.

[0018] Preferably, the structure of the third clamping assembly is the same as that of the second clamping assembly, and the second clamping assembly and the third clamping assembly are symmetrically arranged at two ends of the first arc-shaped clamping plate and the second arc-shaped clamping plate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model discloses a power line clamp for high-voltage transmission. A first clamping assembly is arranged in the middle of the line clamp component, and a second clamping assembly and a third clamping assembly are symmetrically arranged at two ends of the line clamp component. Thus, when the steel strand slips due to increased tension, the second clamping assembly or the third clamping assembly can increase the clamping force, reduce the possibility of slipping of the steel strand, and improve the stability during high-voltage transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the wire clamp component of the utility model.

[0024] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-section at AA.

[0025] Figure 4 This is a schematic diagram of the structure of the first clamping assembly of the utility model.

[0026] Figure 5 It is a schematic diagram of the structure of the second clamping assembly of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 As shown, a power line clamp for high-voltage transmission includes an annular seat 1, and at least one wire clamp component 3 for clamping a steel strand 2 is arranged along the circumference of the outer edge of the annular seat 1, and the wire clamp component 3 includes a first arc-shaped clamp plate 31 and a second arc-shaped clamp plate 32, and the middle parts of the first arc-shaped clamp plate 31 and the second arc-shaped clamp plate 32 together form an annular steel strand clamp hole 33, and a first clamping component 4 is arranged inside the annular steel strand clamp hole 33, and the two ends of the first arc-shaped clamp plate 31 and the second arc-shaped clamp plate 32 symmetrically form a first conical anchor hole 34 and a second conical anchor hole 35, and the first conical anchor hole 34 is fitted with a second clamping component, and the second conical anchor hole 35 is fitted with a third clamping component. The short diameter ends of the first conical anchor hole 34 and the second conical anchor hole 35 are arranged close to each other. The first conical anchor hole 34 and the second conical anchor hole 35 are both connected to the annular steel strand clamp hole 33. An annular steel strand clamp hole 33 is provided in the middle of the clamp component, a first clamping assembly 4 is provided inside the annular steel strand clamp hole 33, and a first conical anchor hole 34 and a second conical anchor hole 35 are symmetrically provided at both ends of the clamp component, the second clamping assembly 34 and the second conical anchor hole 35 are respectively adapted to the second clamping assembly and the third clamping assembly, when the steel strand slides from the second clamping assembly to the third clamping assembly, the second clamping assembly is stressed to increase the clamping force, and when the steel strand slides from the third clamping assembly to the second clamping assembly, the third clamping assembly is stressed to increase the clamping force, so that when the steel strand slides due to increased tension, the second clamping assembly or the third clamping assembly can increase the clamping force, thereby reducing the possibility of slipping of the steel strand and improving the stability during high voltage transmission.

[0030] The axial directions of the first arc-shaped clamping plate 31 and the second arc-shaped clamping plate 32 are both arranged parallel to the axial direction of the annular seat 1 .

[0031] The side of the first arc-shaped clamping plate 31 away from the second arc-shaped clamping plate 32 is connected to the outer edge of the annular seat 1 through a connecting rod. The annular seat 1, the connecting rod, the first arc-shaped clamping plate 31, the second arc-shaped clamping plate 32, the first arc-shaped anti-slip protrusion 41, and the second arc-shaped anti-slip protrusion 42 are all made of materials with good electrical conductivity. The number of the wire clamp parts is one, two, four, six or eight.

[0032] The upper end of the annular seat 1 is provided with a connecting seat 7 connected to the insulator.

[0033] The first arc-shaped clamping plate 31 is symmetrically provided with a plurality of first connecting plates 36 on both sides along the axial direction thereof, and the second arc-shaped clamping plate 32 is symmetrically provided with a plurality of second connecting plates 37 on both sides along the axial direction thereof, and the plurality of first connecting plates 36 and second connecting plates 37 are connected by fastening bolts 38 .

[0034] The first clamping assembly 4 includes a first arc-shaped anti-skid protrusion 41 and a second arc-shaped anti-skid protrusion 42. The first arc-shaped anti-skid protrusion 41 is coaxially arranged on the inner side surface of the first arc-shaped clamping plate 31, and the second arc-shaped anti-skid protrusion 42 is coaxially arranged on the inner side surface of the second arc-shaped clamping plate 32. The first arc-shaped anti-skid protrusion 41 and the second arc-shaped anti-skid protrusion 42 together form an annular anti-skid protrusion. There are a plurality of annular anti-skid protrusions, and the plurality of annular anti-skid protrusions are evenly arranged along the axial direction of the annular steel strand clamping hole 33 at equal intervals.

[0035] The second clamping assembly includes a plurality of first anchor clips 51, which together form a conical anchor clip that matches the first conical anchor hole 34, and a clamping hole for clamping the steel strand 2 is provided inside the conical anchor clip along the axial direction of the first conical anchor hole 34. A plurality of third arc-shaped anti-slip protrusions are also provided on the inner side of the first anchor clip 51. The conical anchor clip and the first conical anchor hole 34 are matched, and when the steel strand slides from the second clamping assembly to the third clamping assembly, the steel strand can drive the conical anchor clip to move toward the short diameter end of the first conical anchor hole 34, thereby squeezing the plurality of first anchor clips 51, reducing the diameter of the clamping hole, and thus increasing the clamping force.

[0036] The second clamping assembly also includes a first backstop plate 52, which is arranged at one end of the first conical anchor hole 34 away from the annular steel strand clamp hole 33. The edges of the two ends of the first arc clamp plate 31 and the second arc clamp plate 32 are respectively provided with a plurality of bolt holes 55. The first backstop plate 52 is connected to the plurality of bolt holes 55 through a plurality of first fastening bolts 53. The middle part of the first backstop plate 52 is provided with a first through hole 54 for the steel strand 2 to pass through. The provision of the first backstop plate 52 can prevent the conical anchor clip from sliding out of the first conical anchor hole 34 when the steel strand slides from the third clamping assembly to the second clamping assembly. The inner diameter of the first through hole 54 is smaller than the maximum end diameter of the conical anchor clip. In order to facilitate installation, the first backstop plate 52 can be made into two C-shaped crescent plates, and the two C-shaped crescent plates share the first backstop plate 52.

[0037] The structure of the third clamping assembly is the same as that of the second clamping assembly, and the second clamping assembly and the third clamping assembly are symmetrically arranged at the two ends of the first arc clamping plate 31 and the second arc clamping plate 32. The working principle of the third clamping assembly is the same as that of the second clamping assembly.

[0038] When in use, first connect it to the insulator on the tower through the connecting seat 7, then put the steel strand into the first arc-shaped clamp, and connect the second arc-shaped clamp with the first arc-shaped clamp by fastening bolts 38. At this time, the first clamping assembly has realized the clamping of the steel strand, and then put a plurality of first anchor clips 51 into the first conical anchor hole 34 along the edge of the steel strand, and connect the first stop plate 52 to the ends of the first arc-shaped clamp 31 and the second arc-shaped clamp 32 by the first fastening bolts 53. The operation mode of the third clamping assembly is the same as that of the second clamping assembly, thereby realizing the clamping of the steel strand.

[0039] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power line clamp for high voltage transmission, characterized in that: The invention comprises an annular seat (1), wherein the outer edge of the annular seat (1) is provided with at least one wire clamp component (3) for clamping a steel strand (2) along its circumference, wherein the wire clamp component (3) comprises a first arc-shaped clamping plate (31) and a second arc-shaped clamping plate (32), wherein the middle parts of the first arc-shaped clamping plate (31) and the second arc-shaped clamping plate (32) together form an annular steel strand clamping hole (33), wherein a first clamping component (4) is provided inside the annular steel strand clamping hole (33), wherein the two ends of the first arc-shaped clamping plate (31) and the second arc-shaped clamping plate (32) symmetrically form a first conical anchor hole (34) and a second conical anchor hole (35), wherein the first conical anchor hole (34) is fitted with a second clamping component, and the second conical anchor hole (35) is fitted with a third clamping component.

2. A power line clamp for high voltage transmission according to claim 1, characterized in that: The first clamping assembly (4) comprises a first arc-shaped anti-slip protrusion (41) and a second arc-shaped anti-slip protrusion (42); the first arc-shaped anti-slip protrusion (41) is coaxially arranged on the inner side surface of the first arc-shaped clamping plate (31); the second arc-shaped anti-slip protrusion (42) is coaxially arranged on the inner side surface of the second arc-shaped clamping plate (32); the first arc-shaped anti-slip protrusion (41) and the second arc-shaped anti-slip protrusion (42) together form an annular anti-slip protrusion.

3. A power line clamp for high voltage transmission according to claim 2, characterized in that: A plurality of the annular anti-slip protrusions are provided, and the plurality of the annular anti-slip protrusions are evenly arranged at equal intervals along the axial direction of the annular steel strand clamping hole (33).

4. A power line clamp for high voltage transmission according to claim 1, characterized in that: The second clamping assembly comprises a plurality of first anchor clips (51), wherein the plurality of first anchor clips (51) together form a conical anchor clip adapted to the first conical anchor hole (34), and a clamping hole for clamping the steel strand (2) is provided inside the conical anchor clip along the axial direction of the first conical anchor hole (34).

5. A power line clamp for high voltage transmission according to claim 4, characterized in that: The second clamping assembly further comprises a first backstop plate (52), the first backstop plate (52) being arranged at one end of the first conical anchor hole (34) away from the annular steel strand clamping hole (33), a plurality of bolt holes (55) being respectively arranged at the edges of both ends of the first arc-shaped clamping plate (31) and the second arc-shaped clamping plate (32), the first backstop plate (52) being connected to the plurality of bolt holes (55) via a plurality of first fastening bolts (53), and a first through hole (54) for allowing the steel strand (2) to pass through being arranged in the middle thereof.

6. A power line clamp for high voltage transmission according to claim 5, characterized in that: The structure of the third clamping assembly is the same as that of the second clamping assembly, and the second clamping assembly and the third clamping assembly are symmetrically arranged at the two ends of the first arc-shaped clamping plate (31) and the second arc-shaped clamping plate (32).

7. A power line clamp for high voltage transmission according to claim 1, characterized in that: The first arc-shaped clamping plate (31) is symmetrically provided with a plurality of first connecting plates (36) on both sides along the axis direction thereof, and the second arc-shaped clamping plate (32) is symmetrically provided with a plurality of second connecting plates (37) on both sides along the axis direction thereof, and the plurality of first connecting plates (36) and second connecting plates (37) are connected by fastening bolts (38).

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