CN218061722U

CN218061722U - Composite cross arm and power transmission pole

Info

Publication number: CN218061722U
Application number: CN202222161395.6U
Authority: CN
Inventors: 郁杰; 张鑫鑫; 黄清; 高凯文
Original assignee: Jiangsu Shemar Electric Co Ltd
Current assignee: Jiangsu Shemar Electric Co Ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-12-16
Anticipated expiration: 2032-08-16

Abstract

The application discloses compound cross arm, fixed connection are on the body of rod of transmission of electricity pole, and compound cross arm includes three pillar composite insulator, and three pillar composite insulator connects gradually and constitutes pillar composite insulator group, and the one end and the body of rod fixed connection of pillar composite insulator group, the other end are the free end, and two liang of positions of connecting of three pillar composite insulator form two connected nodes. The composite cross arm structure can increase the hanging quantity of the conducting wires on one composite cross arm, has a compact wire hanging structure, can reduce the height of a power transmission pole, and improves the electric energy transmission capacity.

Description

Composite cross arm and power transmission pole

Technical Field

The application relates to the technical field of power transmission, in particular to a composite cross arm power transmission pole.

Background

The existing transmission tower is usually provided with three layers of hanging wires, namely three-phase wires are respectively positioned on different horizontal lines, one composite cross arm is generally only hung with one phase wire, the requirement on the overall height of the transmission tower is higher, the wire distribution structure is scattered, the wire loss is larger, and the electric energy transmission capacity is lower.

SUMMERY OF THE UTILITY MODEL

The main objective of this application is to provide a compound cross arm and the transmission of electricity pole that contains this compound cross arm, and hang line compact structure can reduce the height of transmission of electricity pole, promotes electric energy transmission capacity.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: the utility model provides a compound cross arm, fixed connection is on the body of rod of transmission of electricity pole, and compound cross arm includes three pillar composite insulator, and three pillar composite insulator connects gradually and constitutes pillar composite insulator group, and the one end and the body of rod fixed connection of pillar composite insulator group, the other end are the free end, and two liang of positions of connecting of three pillar composite insulator form two connected nodes.

The two connecting nodes and the free end are used for hanging and connecting a three-phase lead.

The composite cross arm further comprises at least one oblique-pulling composite insulator, one end of the oblique-pulling composite insulator is fixedly connected with the part, far away from the rod body, of the pillar composite insulator group, and the other end of the oblique-pulling composite insulator is fixedly connected with the rod body above the pillar composite insulator group.

The composite cross arm comprises two oblique-pulling composite insulators, one ends of the two oblique-pulling composite insulators are respectively connected with any two of the two connecting nodes and the free ends, and the other ends of the two oblique-pulling composite insulators are sequentially and fixedly connected with the rod body above the connecting position of the strut composite insulator group and the rod body.

The composite cross arm comprises three oblique-pulling composite insulators, one ends of the three oblique-pulling composite insulators are fixedly connected with the strut composite insulator group at two connecting nodes and free ends respectively, and the other ends of the three oblique-pulling composite insulators are fixedly connected with the rod body above the connecting position of the strut composite insulator group and the rod body in sequence.

The two ends of each pillar composite insulator are provided with end fittings, and the three pillar composite insulators are sequentially connected through the end fittings to form a pillar composite insulator group.

Wherein, a wiring board is arranged between two end fittings which are connected with each other in the pillar composite insulator group, and a wire hanging point is arranged on the wiring board.

Wherein, the three-phase wire is located same level.

The application still provides a transmission of electricity pole, including the body of rod and the compound cross arm of a plurality of above-mentioned of fixed connection on the body of rod of vertical setting.

Wherein, a plurality of compound cross arms symmetry sets up in the both sides of the body of rod.

The beneficial effect of this application is: different from the condition of prior art, through the compound cross arm structure of optimal design, can increase the wire on the compound cross arm and articulate quantity, the hanging wire compact structure can reduce the height of transmission of electricity pole, reduces the basis of transmission of electricity pole to reduce whole cost, and the specially adapted highly restricted area, economic nature is good, and application scope is wide, can promote electric energy transport capacity simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the present application, the drawings required in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor. Wherein:

fig. 1 is a schematic view of the overall structure of a power transmission pole 10 according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a schematic view of the overall structure of a transmission pole 10 according to another embodiment of the present application;

fig. 4 is a schematic view of the overall structure of a transmission pole 10 according to still another embodiment of the present application;

fig. 5 is a schematic view of the overall structure of a transmission pole 10 according to still another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

As shown in fig. 1, two composite cross arms 100 are symmetrically disposed on a rod body 200 of a power transmission pole 10. Composite cross arm 100 fixed connection is equipped with three wire hookup points 1001 that the certain distance of interval set up on composite cross arm 100 and is used for articulating the wire on the body of rod 200 of transmission pole 10, and all wire hookup points 1001 are located same level, consequently articulate all wires that connect on wire hookup point 1001 and all are located same level. The cross arm type of disposing all the wires at the same level can reduce the overall height of the transmission pole 10, reduce the foundation of the transmission pole 10, thereby reducing the overall weight of the transmission pole 10, reducing the overall cost, and being particularly suitable for highly restricted areas.

Further, as shown in fig. 1 and fig. 2, the composite cross arm 100 includes three post composite insulators 110, end fittings 111 are disposed at two ends of each post composite insulator 110, the three post composite insulators 110 are sequentially connected by the end fittings 111 to form a post composite insulator group 1100, positions where the three post composite insulators 110 are connected two by two are connection nodes 1101, one end of the post composite insulator group 1100 is fixedly connected to the rod body 200, and the other end is a free end. The two connection nodes 1101 and the free end are used for hanging three-phase wires. That is, the three post composite insulators 110 are sequentially connected to form two wire hanging points 1001 at the middle of the post composite insulator set 1100, and the free end of the post composite insulator set 1100 is the third wire hanging point 1001.

The composite cross arm 100 is provided with three wire hanging points 1001 for hanging a single-loop wire, and three-phase wires are respectively hung on the three wire hanging points 1001. In order to ensure the electrical safety between the wires hung on the wire hanging points 1001, the distance between the three wire hanging points 1001 and the distance between the wire and the rod body 200 should be greater than or equal to the safe distance of the wire, the specific size of the safe distance is determined according to the voltage grade of the wire, and the safe distance can be ensured to meet the requirements by adopting the post composite insulator 110 with proper length.

Of course, in other embodiments, the number of the post composite insulators in one post composite insulator group may be four, five or more, as long as three connection nodes can be selected as the wire hanging points, and is not limited herein for practical purposes.

Specifically, the post composite insulator 110 includes an insulator and a shed covering the insulator. The insulator may be a solid insulating core or a hollow insulating tube, wherein when the insulator is a solid insulating core, it may be a solid core rod formed by winding glass fiber or aramid fiber impregnated with epoxy resin, or formed by pultrusion, and when the insulator is a hollow insulating tube, it may be a hollow pultruded tube formed by pultrusion of glass fiber or aramid fiber impregnated with epoxy resin, or a glass steel tube formed by winding curing glass fiber impregnated with epoxy resin, or formed by winding curing aramid fiber impregnated with epoxy resin, without limitation. The umbrella skirt can be made of materials such as high-temperature vulcanized silica gel, liquid silicone rubber or room-temperature vulcanized silicone rubber, and the like, without limitation.

In the pillar composite insulator group 1100, a suspension board is arranged between two end fittings 111 connected with each other, and a lead hanging point 1001 is arranged on the suspension board and used for hanging a lead; meanwhile, the end fitting 111 on the free end of the pillar composite insulator group 1100 is also provided with a wire hooking point 1001 for hooking a wire.

The other side of the rod body 200 is also provided with a composite cross arm 100, and the two composite cross arms 100 are positioned on the same horizontal plane. Three wire hooking points 1001 are arranged on the two composite cross arms 100, so that the two composite cross arms can be used for hooking the double-loop wires. Or in another embodiment, the two composite cross arms 100 may be arranged in a V shape in the same vertical plane, that is, the composite cross arms 100 are disposed obliquely upward in the vertical plane, and the position of the free end of the pillar composite insulator group 1100 is higher than the position of the end of the pillar composite insulator group 1100 connected with the rod body 200.

In other embodiments, the pole body of the transmission pole can be provided with only one composite cross arm, and can be used for hanging the single-loop wire.

In another embodiment, as shown in fig. 3, in order to enhance the structural strength of the composite cross arm 100, the composite cross arm 100 further includes a cable-stayed composite insulator 120, and one end of the cable-stayed composite insulator 120 is fixedly connected to a portion of the pillar composite insulator group 1100 away from the rod body 200. Specifically, one end of the cable-stayed composite insulator 120 is connected to the free end of the post composite insulator group 1100, that is, one end of the cable-stayed composite insulator 120 is connected to the end fitting 111 of the post composite insulator 110, and the other end is fixedly connected to the rod body 200 above the post composite insulator group 1100. Of course, in other embodiments, one end of the cable-stayed composite insulator may also be connected to the connection node of the pillar composite insulator group, which is not limited herein.

In another embodiment, in order to optimize the stress of the composite cross arm 100, as shown in fig. 4, the composite cross arm 100 includes two cable-stayed composite insulators 120, one end of each of the two cable-stayed composite insulators 120 is connected to one connection node 1101 and the free end of the composite insulator group 1100, and the other end of each of the two cable-stayed composite insulators 120 is fixedly connected to the rod body 200 above the connection position of the composite insulator group 1100 and the rod body 200. Other structural forms are the same as those of the previous embodiment, and are not described again here. Of course, in other embodiments, one end of each of the two diagonal composite insulators may also be connected to the two connection nodes, which is not limited herein based on actual requirements.

In another embodiment, as shown in fig. 5, the composite cross arm 100 may include three post composite insulators 110 and three cable-stayed composite insulators 120, one end of each cable-stayed composite insulator 120 is connected to two connection nodes 1101 and a free end of a post composite insulator group 1100, and the other end is fixedly connected to the rod body 200 above a connection position of the post composite insulator group 1100 and the rod body 200. Other structural forms are the same as those of the previous embodiment, and are not described again here. Of course, in other embodiments, the composite cross arm may further include four, five or more cable-stayed composite insulators according to actual requirements.

As shown in fig. 1, a power transmission pole 10 includes two composite cross arms 100 and a pole body 200, each composite cross arm 100 can be hooked with a three-phase wire, and in order to optimize the stress, the two composite cross arms 100 are symmetrically disposed on two sides of the pole body 200. Since the wire hanging points 1001 on the power transmission pole 10 are all located at the same level, the overall height of the power transmission pole 10 can be reduced on the premise that the insulation and safety requirements of the power transmission line are met, the foundation of the power transmission pole is further reduced, and the material and manufacturing costs can be reduced. Of course, in other embodiments, each composite cross arm may also be configured with the number of wire hanging points to hang four-phase, five-phase or more phase wires, three, four or more composite cross arms may also be hung on the power transmission pole, and a plurality of composite cross arms may also be asymmetrically disposed on the pole body, which is not limited herein, depending on the actual requirements.

In other embodiments, as shown in fig. 3-5, the transmission pole 10 is similar to the transmission pole 10 in fig. 1, and includes two composite cross arms 100 and a pole body 200, and the specific structure is as described above and will not be described again.

The beneficial effect of this application is: different from the condition of prior art, through the compound cross arm structure of optimal design, such compound cross arm structure can increase the wire on the same level and articulate quantity, and the hanging wire compact structure can reduce the height of transmission of electricity pole, reduces the basis of transmission of electricity pole to reduce whole cost, and specially adapted highly restricted region can promote electric energy transport capacity simultaneously.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. The utility model provides a compound cross arm, fixed connection is on the body of rod of transmission of electricity pole, its characterized in that, compound cross arm includes three pillar composite insulator, and is three pillar composite insulator connects gradually and constitutes pillar composite insulator group, the one end of pillar composite insulator group with body of rod fixed connection, the other end are the free end, and is three two liang of positions of connecting of pillar composite insulator form two connected node.

2. A composite cross arm according to claim 1, wherein two of the connection nodes and the free end are used for hitching three phase wires.

3. The composite cross arm of claim 1, further comprising at least one cable-stayed composite insulator, wherein one end of the cable-stayed composite insulator is fixedly connected with the part of the pillar composite insulator group far away from the rod body, and the other end of the cable-stayed composite insulator is fixedly connected with the rod body above the pillar composite insulator group.

4. The composite cross arm of claim 3, wherein the composite cross arm comprises two cable-stayed composite insulators, one end of each of the two cable-stayed composite insulators is connected with any two of the two connecting nodes and the free end, and the other end of each cable-stayed composite insulator is fixedly connected with the rod body above the connecting position of the strut composite insulator group and the rod body.

5. The composite cross arm of claim 3, wherein the composite cross arm comprises three cable-stayed composite insulators, one end of each cable-stayed composite insulator is fixedly connected with the post composite insulator group at two connecting nodes and the free end, and the other end of each cable-stayed composite insulator is fixedly connected with the post body above the connecting position of the post composite insulator group and the rod body.

6. The composite cross arm of claim 1, wherein end fittings are arranged at two ends of the post composite insulators, and three post composite insulators are sequentially connected through the end fittings to form the post composite insulator group.

7. The composite cross arm of claim 6, wherein a wire hanging plate is arranged between two end fittings connected with each other in the pillar composite insulator group, and a wire hanging point is arranged on the wire hanging plate.

8. The composite cross arm of claim 2, wherein the three phases of wires are at the same level.

9. A power transmission pole comprising a vertically arranged pole body and a plurality of composite cross arms fixedly connected to the pole body, wherein the composite cross arms employ a composite cross arm as claimed in any one of claims 1 to 8.

10. The power transmission pole of claim 9, wherein a plurality of the composite cross arms are symmetrically disposed on both sides of the pole body.