CN216277186U - A cross arm jumper fixing bracket and a fixing structure between the cross arm and the jumper - Google Patents

Abstract

The utility model provides a cross arm jumper wire fixing support and a fixing structure between a cross arm and a jumper wire. This cross arm wire jumper fixed bolster includes: the first hardware fitting is used for connecting the insulating cross arm; the second hardware fitting is arranged below the first hardware fitting, and a fixed crimping piece is arranged on the second hardware fitting and used for crimping a jumper wire of the overhead conductor so as to fix the jumper wire; and the insulating piece is arranged between the first hardware fitting and the second hardware fitting and used for isolating the insulating cross arm and the jumper wire. The fixed crimping piece on the second hardware is used for crimping the jumper wire, so that the jumper wire is prevented from swinging, the decrease of the dry arc distance of the cross arm caused by swinging of the jumper wire is avoided, the lightning protection effect of the cross arm is guaranteed, and the safety and stability of the operation of the distribution line are improved; cross arm and wire jumper are kept apart through insulating part to keep apart wire end gold utensil with hanging of wire end of wire jumper and cross arm tip, avoid cross arm tip gold utensil to become electrified naked dew point, ensure the security.

Description

A cross arm jumper fixing bracket and a fixing structure between the cross arm and the jumper

technical field

The utility model relates to the technical field of high-voltage power transmission and transformation equipment, in particular to a cross-arm jumper fixing bracket and a fixing structure between the cross-arm and the jumper.

Background technique

The application of the 10kV composite insulation cross arm in the distribution network can effectively improve the lightning resistance level of the line. 10kV composite insulation cross-arm generally requires lightning impulse withstand voltage > 350kV, which can resist more than 90% of the lightning-induced overvoltage of distribution lines. Therefore, the dry arc distance of composite insulation cross-arms used in areas with an altitude of 1000m and below is required to be greater than 600mm ( This value needs to be corrected as the altitude increases).

However, for the composite insulation cross arm of the tensile rod, when the line has a corner, if the jumper is not fixed and swings in strong wind weather, the dry arc distance of the composite insulation cross arm will be reduced, which will affect the lightning protection effect. There is a certain impact.

SUMMARY OF THE INVENTION

In view of this, the utility model proposes a cross-arm jumper fixing bracket and a fixing structure between the cross-arm and the jumper, which aims to solve the problem of the composite insulation cross-arm dry arc caused by the swing of the jumper in the existing line in the windy weather. There is a problem that the reduction of the distance has an impact on the lightning protection effect.

On the one hand, the utility model proposes a cross arm jumper fixing bracket, the cross arm jumper fixing bracket includes: a first metal fitting for connecting an insulating cross arm; a second metal fitting arranged below the first fitting , and the second metal fitting is provided with a fixed crimping piece for crimping the jumper of the overhead wire to realize the fixing of the jumper; the insulating piece is arranged between the first metal fitting and the second metal fitting space for isolating the insulating cross arm and the jumper.

Further, in the above-mentioned cross arm jumper fixing bracket, the fixed crimping piece includes: a first pressing block; a second pressing block, which is opposite to the first pressing block, and the first pressing block and the Two side-by-side crimping parts are formed between the second pressing blocks for crimping two jumper wires respectively.

Further, in the above-mentioned cross-arm jumper fixing bracket, the first pressure block and the second pressure block are both adjustable and connected to the second metal fitting along the axial position of the second metal fitting, for adjusting The size of the crimping part is adapted to the outer diameter of the jumper; the first pressing block and the second pressing block are provided with insulating covers.

Further, in the above-mentioned cross arm jumper fixing bracket, the second hardware includes: a second threaded rod, which is slidably penetrated through the first pressing block and the second pressing block; an adjusting nut, which is connected with the The second threaded rod is adapted and screwed for adjusting the position to adjust the distance between the first pressing block and the second pressing block.

Further, in the above-mentioned cross-arm jumper fixing bracket, a limiting nut is threadedly connected to the second threaded rod on the side of the adjusting nut away from the insulating member, for limiting the adjusting nut.

Further, in the above-mentioned cross-arm jumper fixing bracket, the first hardware includes: a first threaded rod; and a fixing nut, which is adapted to and threadedly connected to the first threaded rod.

On the other hand, the present utility model also proposes a fixing structure between the cross arm and the jumper, wherein the end of the insulating cross arm is connected with the first metal fitting of the above-mentioned cross arm jumper fixing bracket; The wire passes through the fixed crimping piece of the cross-arm jumper wire fixing bracket, and is connected with another jumper wire through the wire clip, so as to realize the freewheeling between the jumper wires.

Further, in the above-mentioned fixing structure between the cross-arm and the jumper, the end of the insulating cross-arm is provided with a wire-hanging end fitting, which is used for the first fitting.

Further, in the above-mentioned fixing structure between the cross arm and the jumper, a bracket connection hole is provided on the hanger end fitting for connecting the first fitting of the cross arm jumper fixing bracket.

Further, in the fixing structure between the above-mentioned cross arm and the jumper, the overhead wire is provided with a tension clamp, and the tension clamp is provided with a pull wire connecting plate, which is connected to the end of the insulating cross arm. The hanging wire end fittings are connected.

In the cross-arm jumper fixing bracket and the fixing structure between the cross-arm and the jumper provided by the utility model, the insulating cross-arm is connected through the first metal fitting, so as to realize the fixing of the cross-arm jumping wire fixing bracket; The fixed crimping piece crimps the jumper, and then realizes the fixation of the jumper, so as to ensure that the jumper does not swing, avoid the jumper swing causing the reduction of the dry arc distance of the cross arm, ensure the lightning protection effect of the cross arm, and improve the power distribution. The safety and stability of the line operation; the cross arm and the jumper are isolated by insulating parts, so as to isolate the jumper and the hanging wire end fittings at the end of the cross arm, so as to prevent the metal fittings at the end of the cross arm from becoming a live exposed point to ensure safety.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are only for the purpose of illustrating the preferred embodiments, and are not considered to be a limitation of the present invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

1 is a schematic structural diagram of a fixed structure between a cross arm and a jumper provided by an embodiment of the present invention;

Fig. 2 is the partial position structure schematic diagram of the fixing structure between the cross arm and the jumper provided by the embodiment of the present invention;

3 is a schematic structural diagram of an end portion of a cross arm provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a cross arm jumper fixing bracket provided by an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIG. 1 to FIG. 4, it shows the preferred structure of the cross arm jumper fixing bracket and the fixing structure between the cross arm and the jumper provided by the embodiment of the present invention. As shown in the figure, the cross arm jumper fixing bracket 1 includes: a first fitting 11, a second fitting 12 and an insulating member 13; wherein the first fitting 11 is used to connect the insulating cross arm 2; the second fitting 12 is arranged on the first fitting Below the first metal fitting 11 (relative to the position shown in FIG. 4 ), and the second metal fitting 12 is provided with a fixed crimping member 14 for crimping the jumper 3 of the overhead conductor 5 to realize the jumper 3 The insulator 13 is arranged between the first fitting 11 and the second fitting 12 for isolating the insulating cross arm 2 and the jumper 3, so as to connect the jumper 3 and the hanging wire end fitting 4 at the end of the insulating cross arm 2 Isolate them to prevent the metal fittings at the end of the cross arm from becoming a live exposed point. In this embodiment, the insulating cross arm 2 is a tensile corner composite insulating cross arm.

As shown in FIG. 1 , the two ends of the insulating cross-arm 2 (upper and lower ends as shown in FIG. 1 ) are respectively connected with the two cross-arm jumper fixing brackets 1 , for example, they can be connected with the first hardware 11 shown in FIG. 2 . Connect, to realize the fixation between this cross-arm jumper fixing bracket 1 and the insulating cross-arm 2, and then support and fix this cross-arm jumper fixing bracket 1 by the insulating cross-arm 2; as shown in Figure 2 and Figure 3, The end of the insulating cross-arm 2 is provided with a hanging wire end fitting 4, which is used to connect the first fitting 11 to realize the connection and fixation between the first fitting 11 and the insulating cross-arm 2, and then realize the cross-arm jumper fixing bracket 1. fixed. Wherein, the insulating cross-arm 2 may be a tensile corner composite insulating cross-arm, or other cross-arms, which are not limited in this embodiment. As shown in FIG. 3 , a bracket connection hole 41 is provided on the wire hanger fitting 4 for connecting the first fitting 11 .

As shown in FIG. 2 , the second metal fitting 12 can be arranged below the first metal fitting 11 , so that the jumper wire 3 sags under the action of gravity, and the jumper wire 3 is crimped by the fixed crimping member 14 , thereby realizing the jumper wire 3 is fixed to ensure that the jumper 3 does not swing, avoid the jumper 3 swinging and reduce the dry arc distance of the insulation cross-arm 2, ensure the lightning protection effect of the insulation cross-arm 2, and improve the safety and stability of the distribution line operation. In this embodiment, in order to facilitate the replacement of the fixed crimping piece 14 , preferably, the fixed crimping piece 14 and the second metal fitting 12 are detachably connected, so that when the fixed crimping piece 14 is damaged or in other situations Replace below.

The insulating member 13 is arranged between the first fitting 11 and the second fitting 12, and is used to isolate the insulating cross arm 2 and the jumper 3, so as to isolate the jumper 3 from the hanging wire end fitting 4 at the end of the insulating cross arm 2, Avoid the metal fittings at the end of the cross arm becoming a live exposed point. Specifically, as shown in FIG. 3 , the first metal fitting 11 , the second metal fitting 12 and the insulating member 13 may be coaxially arranged, so as to provide a compact and fastened structure.

As shown in FIG. 2, the overhead conductor 5 is disconnected at the jumper 3, that is, the insulating cross arm 2, to form two overhead conductors 5, and the jumper 3 of each overhead conductor 5 passes through the fixed crimping piece 14, and The wire clip 8 is connected to another jumper 3 to realize the freewheeling between the jumpers 3 , that is, to realize the freewheeling between the overhead wires 5 . Wherein, the wire frame 8 can be a C-shaped wire clip.

As shown in FIG. 2 , tension clamps 6 are provided on the two overhead conductors 5, and the tension clamps 6 are connected with the hanging wire end fittings 4 at the ends of the insulating cross arm 2 through the pulling wire connecting plate 7, so as to realize the pulling wire The fixing of the connecting plate 7 and the tension clamp 6, that is, the connection between the insulating cross arm 2 and the tension clamp 6 is fixed. As shown in FIG. 3 , two connecting plate connecting holes 42 can also be provided on the hanging wire end fittings 4 for connecting the pulling wire connecting plates 7 on both sides respectively, so as to realize the connection between the insulating cross arm 2 and the pulling wire connecting plates 7 . fixed. One end of the jumper 3 is fixed on the tension clamp 6, and the other end is connected to another jumper 3 through the clamp 8, so as to realize the freewheeling between the jumpers 3; and the jumper 3 is under the action of gravity The two jumpers 3 are slopingly arranged below the tensile wire clip 6 and the pull wire connecting plate 7 , so that a triangular structure is formed between the two jumpers 3 and the two tensile wire clips 6 . If the overhead conductor 5 is an insulated conductor, the overhead conductor 5 shall be installed without peeling at the tension clamp 6; of course, an insulating cover can also be provided on the wire rack 8. The line has no live exposed point.

Specifically, the pull wire connecting plate 7 is also connected with the wire hanging end fitting 4 to realize the fixing of the pulling wire connecting plate 7 and the tension clamp 6 . As shown in FIG. 3 , two connecting plate connecting holes 42 can also be provided on the hanging wire end fittings 4 for connecting the pulling wire connecting plates 7 on both sides respectively, so as to realize the connection between the insulating cross arm 2 and the pulling wire connecting plates 7 . fixed.

Continuing to refer to FIG. 4 , the first fitting 11 may include: a first threaded rod 111 and a fixing nut 112 ; wherein the fixing nut 112 is adapted to and threadedly connected with the first threaded rod 111 for connecting the wire hanging end fitting 4 . Specifically, the first threaded rod 111 may be provided with a first limiting structure 113 for limiting the wire hanging end fitting 4, so that the wire hanging end fitting 4 is clamped between the first limiting structure 113 and the fixing nut between 112. In this embodiment, the first threaded rod 111 and the fixing nut 112 are used to realize the fixing of the wire-hanging end fittings 4, so that the first fittings 11 and the wire-hanging end fittings 4 can be disassembled and fastened, so as to facilitate the connection between the components. The replacement is removable.

Continuing to refer to FIG. 4 , the fixed crimping member 14 includes: a first pressing block 141 and a second pressing block 142 ; wherein the second pressing block 142 is opposite to the first pressing block 141 , and the first pressing block 141 and the second pressing block 141 Two crimping portions 143 arranged side by side are surrounded between the pressing blocks 142 for crimping the two jumpers 3 respectively. Specifically, the first pressing block 141 and the second pressing block 142 may be disposed opposite to each other, and the first pressing block 141 and the second pressing block 142 may be surrounded by two crimping parts 143 arranged side by side, and the two crimping parts 143 may be side by side and spaced apart along the length direction of the second pressing block 142 . Two notches may be provided on opposite walls of the first pressing block 141 and the second pressing block 142 , and the two notches form a crimping portion 143 opposite to each other, so as to realize the crimping of the jumper 3 . In order to facilitate the adjustment of the size of the crimping portion 143 , preferably, both the first pressing block 141 and the second pressing block 142 are connected in an adjustable position along the axial direction (the vertical direction as shown in FIG. 4 ) of the second metal fitting 12 . The second fitting 12 is used to adjust the distance between the first pressing block 141 and the second pressing block 142, and then adjust the size of the crimping portion 143 to fit the outer diameter of the jumper 3, thereby increasing the cross arm Scope of application of jumper fixing bracket 1. Wherein, the first pressing block 141 and the second pressing block 142 may be provided with insulating covers (not shown in the figure), so as to avoid electrified exposed points of the lines.

Continuing to refer to FIG. 4 , the second fitting 12 may include: a second threaded rod 121 , an adjusting nut 122 and a limit nut 123 ; wherein the second threaded rod 121 is slidably penetrated through the first pressing block 141 and the second pressing block 142, so as to realize the position of the first pressing block 141 and the second pressing block 142 along the axial direction of the second threaded rod 121, thereby realizing the adjustment of the size of the crimping part 143, and also enabling the jumper 3 to be removed from the first pressing block 141. and the second pressing block 142 is removed or installed. The adjusting nut 122 is adapted to and threadedly connected with the second threaded rod 121 for adjusting the position to adjust the distance between the first pressing block 141 and the second pressing block 142 . Specifically, the second threaded rod 121 may be provided with a second limiting structure 124 for limiting one of the fixed crimping members 14, so that the first pressing block 141 and the second pressing block 142 are clamped on the second between the limiting structure 124 and the adjusting nut 122 . In this embodiment, through the second threaded rod 121 and the adjusting nut 122 to realize the fixing of the fixed crimping piece 14, not only the disassembly and assembly of the second fitting 12 and the wire hanging end fitting 4 can be realized, but also the connection between the parts is facilitated. It can be replaced and disassembled, and the distance between the first pressure block 141 and the second pressure block 142 can also be adjusted by adjusting the upper and lower positions of the adjusting nut 122, thereby realizing the adjustment of the size of the crimping portion 143. When the distance between the first pressing block 141 and the second pressing block 142 is adjusted, the jumper wire 3 can be removed and installed, and the jumper wire 3 can be tightened by adjusting the nut 122 . In order to avoid the falling off of the adjusting nut 122 , preferably, the second threaded rod 121 is also threadedly connected with a limiting nut 123 on the side of the adjusting nut 122 away from the insulating member 13 (the lower side as shown in FIG. 4 ) for adjusting the adjusting nut 122 . The nut 122 is limited to prevent the adjusting nut 122 from moving downward from the bottom end of the second threaded rod 121 and falling off, and at the same time, the stability of the adjusting nut 122 can be further ensured.

To sum up, the cross-arm jumper fixing bracket and the fixing structure between the cross-arm and the jumper provided in this embodiment are connected to the insulating cross-arm 2 through the first hardware 11, so as to realize the fixing of the cross-arm jumper fixing bracket 1; The jumper 3 is crimped by the fixed crimping member 14 on the second fitting 12, thereby realizing the fixing of the jumper 3, so as to ensure that the jumper 3 does not swing, and avoid the jumper 3 swinging and causing the dry arc distance of the insulating cross arm 2 Reduced to ensure the lightning protection effect of the insulating cross-arm 2, and improve the safety and stability of the distribution line operation; the insulating cross-arm 2 and the jumper 3 are isolated by the insulating member 13, so as to separate the jumper 3 and the end of the insulating cross-arm 2. The hanging wire end fittings 4 are isolated to prevent the end fittings from becoming a live exposed point to ensure safety.

It should be noted that, in the description of the present invention, the terms “upper”, “lower”, “left”, “right”, “inner”, “outer” and other terms indicated in the direction or the positional relationship are based on the accompanying drawings The direction or positional relationship shown is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, it should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, or It can be a detachable connection or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (10)

1. The utility model provides a cross arm wire jumper fixed bolster which characterized in that includes:

the first hardware fitting is used for connecting the insulating cross arm;

the second hardware fitting is arranged below the first hardware fitting, and a fixed crimping piece is arranged on the second hardware fitting and used for crimping a jumper wire of the overhead conductor so as to fix the jumper wire;

and the insulating piece is arranged between the first hardware fitting and the second hardware fitting and used for isolating the insulating cross arm and the jumper wire.

2. The cross-arm jumper fixing bracket of claim 1, wherein the fixing crimp member comprises:

a first pressing block;

and the second pressing block is butted with the first pressing block, and two crimping parts arranged side by side are enclosed between the first pressing block and the second pressing block and used for respectively crimping the two jumper wires.

3. The cross-arm jumper fixing bracket of claim 2,

the first pressing block and the second pressing block are connected to the second hardware fitting in an adjustable mode along the axial position of the second hardware fitting and used for adjusting the size of the pressing part to be matched with the outer diameter of the jumper;

and the first pressing block and the second pressing block are provided with insulating covers.

4. The cross-arm jumper fixing bracket of claim 3, wherein the second fitting comprises:

the second threaded rod is slidably arranged in the first pressing block and the second pressing block in a penetrating mode;

and the adjusting nut is matched with the second threaded rod, is in threaded connection and is used for adjusting the position so as to adjust the distance between the first pressing block and the second pressing block.

5. The cross-arm jumper fixing bracket of claim 4,

and one side of the second threaded rod, far away from the insulating part, of the adjusting nut is further in threaded connection with a limiting nut for limiting the adjusting nut.

6. The cross-arm jumper fixing bracket according to any one of claims 1 to 5, wherein the first fitting comprises:

a first threaded rod;

and the fixing nut is matched with the first threaded rod and is in threaded connection with the first threaded rod.

7. A fixing structure between a cross arm and a jumper wire is characterized in that,

the ends of the insulating cross arm are respectively connected with the first hardware of the cross arm jumper wire fixing bracket of any one of claims 1 to 6;

each jumper wire penetrates through the fixed compression joint piece of the cross arm jumper wire fixing support and is connected with another jumper wire through a wire clamp so as to realize follow current between the jumper wires.

8. The fixing structure between the cross arm and the jumper wire according to claim 7,

and the end part of the insulating cross arm is provided with a wire hanging end fitting used for the first fitting.

9. The fixing structure between the cross arm and the jumper wire according to claim 8,

and the hanging wire end fitting is provided with a support connecting hole for connecting the first fitting of the cross arm jumper wire fixing support.

10. The fixing structure between the cross arm and the jumper wire according to any one of claims 7 to 9,

and a strain clamp is arranged on the overhead conductor, and a stay wire yoke plate is arranged on the strain clamp and is connected with a wire hanging end hardware fitting at the end part of the insulating cross arm.

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