CN219509347U

CN219509347U - Cross arm assembly and power transmission tower

Info

Publication number: CN219509347U
Application number: CN202320579368.2U
Authority: CN
Inventors: 王鑫龙; 李焱琳; 王昊; 王晨
Original assignee: Shanghai Shenma Electric Power Engineering Co ltd
Current assignee: Shanghai Shenma Electric Power Engineering Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-08-11
Anticipated expiration: 2033-03-22

Abstract

The utility model relates to a cross arm assembly and a power transmission tower. The cross arm assembly includes: a first insulator; the second insulator is positioned below the first insulator; a hardware assembly comprising: at least one splint, the splint includes: the first support part and the second support part are positioned below the first support part, and mounting holes are formed in the first support part and/or the second support part; the first supporting part and the second supporting part are respectively connected with two ends of the bending part; the bending part is used for connecting one end of the first insulator and one end of the second insulator; the first connecting piece is connected with the other end of the first insulator and is used for connecting with a tower body of the power transmission tower; the second connecting piece is connected with the other end of the second insulator and is used for being connected with the tower body of the power transmission tower. The cross arm assembly is connected with the insulator through the clamping plate and is used for mounting the lead, so that the cross arm assembly is convenient to install.

Description

Cross arm assembly and power transmission tower

Technical Field

The utility model relates to the field of power transmission equipment, in particular to a cross arm assembly and a power transmission tower.

Background

Overhead lines are the most commonly used form of transmission line, which typically extend from the tower body to a cross arm assembly to mount conductors. The cross arm assembly is connected with the mounting strings through the hardware assembly, the mounting board and other hardware strings can only mount the wires, and the structure is complex and inconvenient to mount.

Disclosure of Invention

Based on the problems, the utility model provides the cross arm assembly and the power transmission tower, and the cross arm assembly is convenient to install.

One embodiment of the present utility model provides a cross arm assembly comprising: a first insulator; the second insulator is positioned below the first insulator; a hardware assembly comprising: at least one splint, the splint comprising: the first support part and the second support part are positioned below the first support part, and mounting holes are formed in the first support part and/or the second support part; the first supporting part and the second supporting part are respectively connected with two ends of the bending part; the bending part is used for connecting one end of the first insulator and one end of the second insulator; the first connecting piece is connected with the other end of the first insulator and is used for connecting with a tower body of the power transmission tower; the second connecting piece is connected with the other end of the second insulator and is used for connecting the tower body of the power transmission tower.

According to some embodiments of the utility model, the number of clamping plates is two, namely a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are arranged in parallel, and the bending parts of the first clamping plate and the second clamping plate can clamp one end of the first insulator and one end of the second insulator.

According to some embodiments of the utility model, the first insulator is rotatable relative to the tower body of the power transmission tower, the second insulator is rotatable relative to the tower body of the power transmission tower, the rotation axis of the first insulator is collinear with the rotation axis of the second insulator, and the rotation axis of the first insulator and the rotation axis of the second insulator are both obliquely arranged relative to the vertical direction.

According to some embodiments of the utility model, the rotation axis of the first insulator and the rotation axis of the second insulator are both inclined from the vertical by 10 ° to 30 °.

According to some embodiments of the utility model, the axis of the second insulator is disposed obliquely upward relative to the horizontal direction or according to some embodiments of the utility model in the horizontal direction, the axis of the second insulator is inclined upward from the horizontal direction by 1 ° to 30 °.

According to some embodiments of the utility model, the fitting assembly further comprises a wire clip, the wire clip connecting the mounting hole.

According to some embodiments of the utility model, a connecting plate is disposed at one end of the second insulator, and the hardware assembly is connected to the connecting plate.

According to some embodiments of the utility model, the first connector and the second connector each comprise: the base is used for connecting the tower body of the power transmission tower; the rotating block is rotatably arranged on the base; the rotating block of the first connecting piece is connected with the first insulator, and the rotating block of the second connecting piece is connected with the second insulator.

According to some embodiments of the utility model, the base comprises a first base and a second base, the first base and the second base are respectively connected with a tower body of the power transmission tower, a rotation space is formed between the first base and the second base, and the rotation block is located in the rotation space.

One embodiment of the present utility model provides a power transmission tower including: a tower body; the cross arm assembly is arranged on the tower body.

According to some embodiments of the utility model, the tower comprises a tower body and a support frame, the support frame is arranged on a side wall of the tower body, and the support frame comprises: one end of the support rod is connected with the tower body; and the end block is connected with the other end of the supporting rod, and the first connecting piece is arranged on the end block.

In the cross arm assembly, the clamping plate of the hardware assembly can be connected with the insulator and used for mounting the lead, and the hardware assembly is simple in structure and convenient to install.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings by a person skilled in the art without departing from the scope of the present utility model as claimed.

Fig. 1 is a schematic diagram of a transmission tower according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a cross arm assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a hardware assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a splint according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a web according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a connector according to an embodiment of the present utility model;

fig. 7 is a schematic view of a supporting frame according to an embodiment of the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made more complete and clear by reference to the accompanying drawings of embodiments of the present utility model, wherein it is evident that the embodiments described are some, but not all, of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a cross arm assembly 100, where the cross arm assembly 100 is disposed on a tower body 200 of a power transmission tower, and the cross arm assembly 100 is used for mounting wires. The cross arm assembly 100 includes a first insulator 1, a second insulator 2, a fitting assembly 3, a first connector 4, and a second connector 5.

The first insulator 1 is arranged by the downward inclination of the tower body 200, one end of the first insulator 1 is connected with the hardware fitting assembly 3, and the first insulator 1 plays a role in suspending the second insulator 2 and the hardware fitting assembly 3. The other end of the first insulator 1 is connected to a first connector 4, and the first connector 4 is disposed on the tower body 200.

The second insulator 2 is located below the first insulator 1. One end of the second insulator 2 is connected with the hardware fitting assembly 3, and the second insulator 2 plays a supporting role on the first insulator 1 and the hardware fitting assembly 3. The other end of the second insulator 2 is connected to a second connecting member 5, and the second connecting member 5 is disposed on the tower body 200.

Optionally, the first insulator 1 and the second insulator 2 each comprise an insulator and an umbrella cover coated on the periphery of the insulator, wherein the insulator is a solid rod or a hollow tube made of a composite material. In one embodiment, the first insulator 1 is a line composite insulator and the second insulator 2 is a post composite insulator.

As shown in fig. 2, 3 and 4, the fitting assembly 3 includes at least one clamping plate 31, which is substantially C-shaped and includes a first supporting portion 31A, a second supporting portion 31B and a bending portion 31C. The second supporting portion 31B is located below the first supporting portion 31A, and the first supporting portion 31A and the second supporting portion 31B are respectively connected to two ends of the bending portion 31C. The bent portion 31C of the clamping plate 31 is used to connect the end of the first insulator 1 connecting fitting assembly 3 and the end of the second insulator 2 connecting fitting assembly 3.

Alternatively, the number of the clamping plates 31 is two, i.e., the first clamping plate 311 and the second clamping plate 312, and the first clamping plate 311 and the second clamping plate 312 are disposed parallel to each other.

The first clamping plate 311 and the second clamping plate 312 connect the end of the first insulator 1 and the end of the second insulator 2 by fasteners. For example, the first clamping plate 311 and the second clamping plate 312 are connected by fasteners such as screws, and the end of the first insulator 1 and the end of the second insulator 2 are located between the bending portion 31C of the first clamping plate 311 and the bending portion 31C of the second clamping plate 312, and the bending portion 31C of the first clamping plate 311 and the bending portion 31C of the second clamping plate 312 can clamp the end of the first insulator 1 connecting fitting assembly 3 and the end of the second insulator 2 connecting fitting assembly 3, so that the bending strength of the fitting assembly 3 can be improved, and the bearing capacity of the cross arm assembly 100 can be further improved. The first clamping plate 311 and the second clamping plate 312 can clamp the first insulator 1 and the second insulator 2, the hardware assembly 3 is further used for mounting wires, and the hardware assembly is simple in structure and convenient to install the cross arm assembly 100.

Optionally, a first insulator connection hole 313 is provided at the bending portion 31C, an adjusting fitting such as a hanging plate is connected to an end portion of the first insulator 1, a connection hole is provided on the hanging plate, and the first insulator connection hole 313 of the first clamping plate 311, the connection hole of the hanging plate, and the first insulator connection hole 313 of the second clamping plate 312 are sequentially penetrated through by fasteners such as bolts, so that the bending portion 31C of the first clamping plate 311 and the bending portion 31C of the second clamping plate 312 can clamp the hanging plate to fasten and connect the second fitting 31 with the first insulator 1. The shape and number of the adjusting hardware tools can be adjusted according to the design and installation requirements of the cross arm assembly 100.

As shown in fig. 5, in some embodiments, the end of the second insulator 2 is provided with a connection plate 22. Alternatively, the second insulator 2 includes a core rod 21, and the end of the core rod 21 is provided with a metal member, and the end face of the metal member remote from the core rod 21 is provided with a connection plate 22. In one embodiment, the number of clamping plates 31 is two, namely, the first clamping plate 311 and the second clamping plate 322, the connecting plate 22 is located between the bending portion 31C of the first clamping plate 311 and the bending portion 31C of the second clamping plate 312, so that the bending portion 31C of the first clamping plate 311 and the bending portion 31C of the second clamping plate 312 can clamp the connecting plate 22, and the second insulator connecting hole 314 is provided at the bending portion 31C to firmly connect the fitting assembly 3 with the second insulator 2. In another embodiment, the number of clamping plates 31 is one, and the bending portion 31C of the clamping plate 31 is directly and fixedly connected with the connecting plate 22 through a fastener. The shape and number of the clamping plates 31 may be adjusted according to the design and installation requirements of the cross arm assembly 100, as long as reliable connection of the first insulator 1 and the second insulator 2 can be achieved.

The first supporting portion 31A and/or the second supporting portion 31B are provided with mounting holes 315, and the mounting holes 315 are used for mounting wires. Optionally, the wires are split wires, and the number of split wires is set according to the requirement.

In some embodiments, the fitting assembly 3 further includes a wire clip 32, the wire clip 32 being disposed in the mounting hole 315, the wire clip 32 being configured to secure a wire. The specific number of mounting holes 315 and clips 32 are correspondingly set according to the number of wire splits required.

When a plurality of wires of a cross arm assembly 100 are arranged as a wire group along the vertical direction at intervals on the tower body 200, the wires can be mounted only by mounting strings, mounting plates and other strings relative to the traditional hardware assembly, the hardware assembly 3 of the embodiment omits the structure of the hardware string, can directly mount the wires, can effectively reduce the distance between adjacent wire groups in the vertical direction, is beneficial to reducing the overall tower height, and further improves the economy of the power transmission line.

In some embodiments, the axis of the second insulator 2 is disposed along the horizontal direction H, facilitating installation and wire-laying of the hardware assembly 3. Specifically, since the first supporting portion 31A and the second supporting portion 31B of the fitting assembly 3 are required to be horizontally arranged when being hung, when the second insulator 2 horizontally arranged is connected with the fitting assembly 3, the fitting assembly 3 is directly and horizontally installed for hanging wires, and the fitting assembly 3 is simple and convenient to design and install.

In some embodiments, the axis M of the second insulator 2 is disposed obliquely upward relative to the horizontal direction H. Under the condition of the same load, the second insulator 2 which is arranged obliquely bears less stress relative to the second insulator 2 which is arranged horizontally. When bearing the same load, the second insulator 2 which is obliquely arranged can be an insulator with smaller specification, so that the safety is ensured and the economical efficiency is improved.

Alternatively, the axis M of the second insulator 2 is inclined upward from the horizontal direction H by 1 ° to 30 °.

As shown in fig. 2 and 3, the cross arm assembly 100 further comprises at least one first pressure equalizing device 6. The first pressure equalizing device 6 is of a closed loop type or non-closed arc type structure, and the structure of the first pressure equalizing device 6 is set according to requirements. The first pressure equalizing device 6 is arranged on the hardware fitting assembly 3. The first voltage equalizing device 6 plays a role of an even electric field, and improves the safety of the cross arm assembly 100. Alternatively, the first pressure equalizing device 6 is an existing pressure equalizing device.

For example, the first support portion 31A is provided with a first pressure equalizing device mounting hole 316 for mounting the first pressure equalizing device 6. Alternatively, the first pressure equalizing device mounting hole 316 is located at an end of the first support portion 31A remote from the curved portion 31C.

Optionally, the cross arm assembly 100 further comprises at least one second pressure equalizing device 7. The second pressure equalizing device 7 is of a non-closed arc structure. The second pressure equalizing device 7 is arranged on the hardware fitting assembly 3. For example, a second pressure equalizing device mounting hole 317 is provided in the second supporting portion 31B to mount the second pressure equalizing device 7 on the fitting assembly 3. The second voltage equalizing device 7 is arranged on the hardware fitting assembly 3, so that a better uniform electric field can be achieved, and the performance of the cross arm assembly 100 is improved. The second pressure equalizing means 7 may be arranged in a semi-annular shape.

As shown in fig. 2, in some embodiments, the first connector 4 and the second connector 5 are both hinged, the first insulator 1 is rotatable relative to the tower body 200 of the power transmission tower, and the second insulator 2 is rotatable relative to the tower body 200 of the power transmission tower. In fig. 2, H is in the horizontal direction, and V is in the vertical direction.

When the cross arm assembly 100 is actually operated, the cross arm assembly 100 is affected by factors such as wind load, so that unbalanced tension is generated on the wires, at the moment, the cross arm assembly 100 rotates towards the side with larger tension of the wires, parameters such as the span of the wires at two sides (horizontal distance between the wire hanging points of two adjacent power transmission towers) are changed, namely, the wire hanging ends of the wires on the cross arm assembly 100 are displaced until the wires are deflected to a certain position, the tension of the wires at two sides reaches new balance, so that the unbalanced tension is released, and the safety of a power transmission line is improved.

In some embodiments, the axis of rotation of the first insulator 1 is collinear with the axis of rotation of the second insulator 2. In the present embodiment, the rotation axis of the first insulator 1 and the rotation axis of the second insulator 2 are both located on the straight line L. The first insulator 1 and the second insulator 2 rotate around the straight line L, when the wires at two sides of the cross arm assembly 100 have longitudinal unbalanced tension, the first insulator 1 and the second insulator 2 can deflect, parameters such as the span of the wires at two sides are changed, and further when the wires deflect to a proper position, the tension of the wires at two sides reaches new balance, and the release of the longitudinal unbalanced tension is completed.

Alternatively, the rotation axis of the first insulator 1 and the rotation axis of the second insulator 2 are both located on a straight line L, and the straight line L is disposed obliquely with respect to the vertical direction V. Since the rotation locus of the link end of the crossarm assembly 100 is a circular arc locus having a perpendicular distance of the link end to the rotation axis as a radius in a rotation plane perpendicular to the rotation axis. For a rotation axis which is vertically arranged, the hanging wire end of the rotation axis rotates in a horizontal rotation plane and cannot move upwards in the vertical direction; when the rotation axis is obliquely arranged relative to the vertical direction V, the rotation plane vertical to the rotation axis is inclined upwards relative to the horizontal direction, so that the wire hanging end tends to move upwards when the first insulator 1 and the second insulator 2 rotate around the inclined straight line L, namely in the direction of figure 1, when the first insulator 1 and the second insulator 2 do not rotate, the wire hanging end is in a static rotation state and is positioned at the lowest point; when the first insulator 1 and the second insulator 2 rotate relative to the tower body, the hanging wire end moves upwards. The hanging wire end of the cross arm assembly 100 bears the weight of the hanging wire and the cross arm assembly 100, so that the upward movement trend of the hanging wire end can be restrained, the continuous rotation of the cross arm assembly 100 is restrained, the effect of avoiding insufficient electric gap between the wire and the tower body due to overlarge rotation angle of the cross arm assembly 100 is achieved, and the cross arm assembly 100 reaches an equilibrium state until the first insulator 1 and the second insulator 2 are not rotated any more. Alternatively, the straight line L is inclined from 10 ° to 30 ° with respect to the vertical direction.

As shown in fig. 6, each of the first connector 4 and the second connector 5 includes: a base 41 and a swivel block 42. The base 41 is U-shaped overall, and the base 41 is fastened to the tower 200 by a fastener such as a screw. The rotating block 42 is rotatably disposed on the base 41, for example, the rotating block 42 is connected to the base 41 through a rotating shaft. The rotating block 42 of the first connecting piece 4 is connected with the first insulator 1, and the rotating block 42 of the second connecting piece 5 is connected with the second insulator 2, so that the first insulator 1 and the second insulator 2 can rotate relative to the tower body 200.

Optionally, a length adjusting member is provided between the first insulator 1 and the rotating block of the first connector 4, so as to facilitate the installation of the cross arm assembly 100. The length adjusting piece can be an existing adjusting hardware fitting.

In some embodiments, the base 41 includes a first base 411 and a second base 412, the first base 411 and the second base 412 are all L-shaped, the first base 411 and the second base 412 are respectively connected to the tower body 200 of the power transmission tower, and the first base 411 and the second base 412 are oppositely arranged to form a rotation space. The rotation block 42 is located in the rotation space. One end of the rotating shaft of the rotating block 42 is connected with the first base 411, and the other end is connected with the second base 412.

The embodiment of the utility model also provides a power transmission tower, which comprises a tower body 200 and the cross arm assembly 100, wherein the cross arm assembly 100 is arranged on the tower body 200. The cross arm assembly 100 is used to mount wires.

As shown in fig. 1, in some embodiments, the tower 200 includes a tower body 210 and a support stand 220. Alternatively, the tower body 210 is composed of angle steel, and the supporting frame 220 is disposed on a sidewall of the tower body 210.

As shown in fig. 7, the support frame 220 includes: a support bar 221 and an end block 222. One end of the supporting rod 221 is connected with the tower body 210, the other end of the supporting rod 221 is connected with the end block 222, and the first connecting piece 4 is arranged on the end face, far away from the tower body 210, of the end block 222. The end block 222 is provided with an end surface of the first connecting member 4 inclined with respect to the vertical direction so that the straight line L is inclined with respect to the vertical direction, facilitating the installation of the cross arm assembly 100 onto the tower body 200. The support bar 221 includes a plurality of bars, and the plurality of bars connect the end blocks 222 to the end surface of the tower body 210.

The above description of the embodiments of the present utility model is provided in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, which are provided to facilitate understanding of the technical solution of the present utility model and the core ideas thereof. Therefore, those skilled in the art will appreciate that many changes and modifications can be made in the specific embodiments and applications of the utility model based on the spirit and scope of the utility model. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. A cross arm assembly, comprising:

a first insulator;

the second insulator is positioned below the first insulator;

a hardware assembly comprising: at least one splint, the splint comprising:

the first support part and the second support part are positioned below the first support part, and mounting holes are formed in the first support part and/or the second support part;

the first supporting part and the second supporting part are respectively connected with two ends of the bending part;

the bending part is used for connecting one end of the first insulator and one end of the second insulator;

the first connecting piece is connected with the other end of the first insulator and is used for connecting with a tower body of the power transmission tower;

the second connecting piece is connected with the other end of the second insulator and is used for connecting the tower body of the power transmission tower.

2. The crossarm assembly of claim 1, wherein the number of clamping plates is two, a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate being disposed parallel to each other, the bent portions of the first clamping plate and the bent portions of the second clamping plate being capable of clamping one end of the first insulator and one end of the second insulator.

3. The crossarm assembly of claim 1, wherein the first insulator is rotatable with respect to a tower body of the power transmission tower, the second insulator is rotatable with respect to the tower body of the power transmission tower, a rotational axis of the first insulator is collinear with a rotational axis of the second insulator, and the rotational axis of the first insulator and the rotational axis of the second insulator are both disposed obliquely with respect to a vertical direction.

4. The crossarm assembly of claim 3 wherein the axis of rotation of the first insulator and the axis of rotation of the second insulator are both inclined from vertical by 10 ° to 30 °.

5. The crossarm assembly of claim 1 wherein the axis of the second insulator is disposed obliquely upward relative to or in a horizontal direction.

6. The cross arm assembly of claim 5, wherein the axis of the second insulator is inclined upwardly from 1 ° to 30 ° relative to horizontal.

7. The cross arm assembly of claim 1, further comprising a clip connecting the mounting hole.

8. The cross arm assembly of claim 1, wherein one end of the second insulator is provided with a connection plate, and the hardware assembly is connected to the connection plate.

9. The crossarm assembly as claimed in any one of claims 1 to 8 wherein the first and second connectors each comprise:

the base is used for connecting the tower body of the power transmission tower;

the rotating block is rotatably arranged on the base;

the rotating block of the first connecting piece is connected with the first insulator, and the rotating block of the second connecting piece is connected with the second insulator.

10. The crossarm assembly of claim 9, wherein the base comprises a first base and a second base, the first base and the second base being respectively connected to a tower body of the power transmission tower, a rotational space being formed between the first base and the second base, the rotor being located in the rotational space.

11. A power transmission tower, comprising:

a tower body;

a crossarm assembly according to any one of claims 1 to 10, the crossarm assembly being provided on the tower.

12. The transmission tower of claim 11, wherein the tower body comprises a tower body and a support frame, the support frame being disposed on a sidewall of the tower body, the support frame comprising:

one end of the support rod is connected with the tower body;

and the end block is connected with the other end of the supporting rod, and the first connecting piece is arranged on the end block.