CN217129118U

CN217129118U - Power transmission tower

Info

Publication number: CN217129118U
Application number: CN202220192235.5U
Authority: CN
Inventors: 王昊; 李维勃; 王鑫龙; 王晨; 吴金霖; 王梓旭
Original assignee: Shanghai Shenma Electric Power Engineering Co ltd
Current assignee: Shanghai Shenma Electric Power Engineering Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-08-05
Anticipated expiration: 2032-01-24

Abstract

The application discloses transmission tower includes: the horizontal section of the tower body is quadrilateral; the composite cross arm comprises a cross arm hardware fitting, the cross arm hardware fitting is erected and fixed on the tower body, and two ends of the cross arm hardware fitting are respectively fixed on two opposite sides of the quadrangle. The application provides a transmission tower has changed the connected mode of compound cross arm and body of the tower, can simplify the connection structure of compound cross arm and body of the tower, optimizes the transmission mode of structure atress and load simultaneously.

Description

Power transmission tower

Technical Field

The application relates to the technical field of power transmission, in particular to a power transmission tower.

Background

At present, the connection form of the composite cross arm and the power transmission tower is that the end part of the composite cross arm is fixedly connected with the body of the power transmission tower through a connecting hardware fitting. However, the connection mode has a very high requirement on the connection strength of the end connection, and often needs to adopt a high-strength end connection fitting, so that the weight and the cost of the end connection fitting are high, and the installation is also inconvenient. Therefore, a scheme for reducing the end stress of the composite cross arm and stably connecting the composite cross arm needs to be found.

SUMMERY OF THE UTILITY MODEL

The utility model provides a transmission tower can optimize the connection structure of compound cross arm and body of the tower, reduces tip link fitting weight, reduces compound cross arm tip stress, improves connection stability.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: provided is a power transmission tower including: the horizontal section of the tower body is quadrilateral; the composite cross arm comprises a cross arm hardware fitting, the cross arm hardware fitting is erected and fixed on the tower body, and two ends of the cross arm hardware fitting are respectively fixed on two sides opposite to each other in a quadrilateral mode.

Specifically, the cross arm hardware fitting is provided with a fixing piece fixed with the tower body.

Specifically, the cross arm gold utensil includes the sleeve, and the mounting is L shape fluting floor, and the sleeve is arranged in the fluting of mounting.

Specifically, the composite cross arm penetrates through the tower body and extends towards two sides of the tower body.

Specifically, the composite cross arm comprises a composite insulator, the cross arm hardware fitting is fixed in the middle of the composite insulator in a sealing mode, and two ends of the composite insulator are free ends and are used for hanging and connecting a wire.

Specifically, the composite cross arm comprises two composite insulators, one ends of the two composite insulators are fixedly connected with two ends of the cross arm hardware fitting in a sealing mode respectively, and the other ends of the two composite insulators are free ends and used for hanging and connecting wires.

Specifically, the composite cross arm comprises a composite insulator, one end of the composite insulator is connected with the cross arm hardware fitting in a sealing mode, and the other end of the composite insulator is a free end and used for hanging a lead.

Specifically, the power transmission tower further comprises a top phase composite cross arm, and the top phase composite cross arm is vertically fixed to the top of the tower body.

Specifically, the composite cross arm comprises a composite insulator, the composite insulator comprises an insulator and an umbrella skirt coated on the periphery of the insulator, and the insulator is a hollow insulating tube or a solid core rod.

Specifically, the length of the cross arm fitting is greater than or equal to the width of the tower body.

The beneficial effect of this application is: the utility model provides a transmission tower utilizes the direct form of taking over in the body of the tower of cross arm gold utensil through the connected mode that changes compound cross arm and transmission tower, has simplified the connected mode of compound cross arm and transmission tower body of the tower, has reduced the quality of tip link fitting, can also guarantee the stability that compound cross arm and body of the tower are connected simultaneously.

The two ends of the two insulators are respectively sleeved with the cross arm hardware fitting, so that the insulation length of the composite cross arm is adjustable, the insulators and the cross arm hardware fitting of the same specification can be applied to power transmission towers of different specifications in different combination modes, and the applicability of the composite cross arm is improved.

In addition, the arrangement of the sleeve type cross arm fitting also avoids the direct contact between the surface of the composite insulator and the tower body, and avoids the surface damage of the composite insulator caused by contact stress, so that the insulation performance of the composite insulator is weakened.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

fig. 1 is a schematic structural view of an embodiment of a transmission tower of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic structural view of another embodiment of a transmission tower according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be 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 the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1 and 2, the power transmission tower 10 includes a tower body 100 and a composite cross arm 200, and the composite cross arm 200 is horizontally inserted through the tower body 100. Specifically, the horizontal cross section of the tower body 100 is a quadrangle, the composite cross arm 200 comprises a cross arm fitting 2100, the composite cross arm 200 is erected and fixed on the tower body 100 through the cross arm fitting 2100, and two ends of the cross arm fitting 2100 are respectively fixed on two opposite sides of the quadrangle, so that the composite cross arm 200 and the tower body 100 are fixedly connected.

Further, the cross arm fitting 2100 is fixedly connected to the tower body 100 by a fixing member 3000. Specifically, the two fixing members 3000 are respectively disposed at two ends of the cross arm hardware 2100, and are respectively fixedly connected to two opposite edges of the quadrangular horizontal cross section of the tower body 100, so as to better fixedly connect the tower body 100 and the composite cross arm 200. The fixing member 3000 is an L-shaped grooved rib plate, and the L-shaped fixing member 3000 includes a horizontal plate 3100 and a vertical plate 3200 which are vertically connected to each other. Wherein, a through hole 3110 is arranged on the horizontal plate 3100, which is used for fixedly connecting with the tower body 100; the vertical plate 3200 is provided with a slot 3210 matched with the cross arm fitting 2100 in shape for clamping the cross arm fitting 2100. The horizontal plate 3100 is provided with two through holes 3110 respectively disposed at two sides of the slot 3210.

In this embodiment, the cross arm hardware fitting 2100 is a sleeve structure, and the sleeve is embedded in the slot 3210 fixed to the L-shaped slotted rib plate and tightly attached to the horizontal plate 3100, and is further fixedly connected to the fixing member 3000 by welding or the like, so as to fixedly connect the composite cross arm 200 to the tower body 100. The sleeve can be fixedly connected with the vertical plate 3200 and the horizontal plate 3100 at the same time in a welding mode, so that the connection strength between the composite cross arm 200 and the fixing piece 3000 can be enhanced. By adjusting the connection area between the sleeve and the horizontal plate 3100, the connection strength between the cross arm fitting 2100 and the fixing member 3000 is adjusted to meet the stress requirements of different voltage levels, so that the power transmission tower 10 has stronger adaptability. In other embodiments, the cross arm hardware may also be in other structural forms, such as a plate-shaped structure or a rod-shaped structure, which is not limited herein for practical purposes.

In one embodiment, the composite cross arm 200 includes a composite insulator, and the cross arm fitting 2100 is disposed in the middle of the composite insulator. Specifically, the composite insulator includes an insulator and an umbrella skirt covering the periphery of the insulator, the cross arm fitting 2100 is fixedly sleeved on the outer peripheral surface of the middle portion of the insulator of the composite insulator, and meanwhile, the position where the cross arm fitting 2100 is connected with the insulator is hermetically covered by the umbrella skirt covering the periphery of the insulator, so that the hermetic connection between the cross arm fitting 2100 and the insulator is realized, and the overall insulating performance of the composite cross arm 200 is further ensured.

The insulator may be a solid insulating core or a hollow insulating tube, wherein when the insulator is a solid insulating core, the insulator 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, the insulator may be a hollow pultruded tube formed by winding glass fiber or aramid fiber impregnated with epoxy resin, or formed by winding curing glass fiber impregnated with epoxy resin, or formed by pultrusion, or formed by winding curing aramid fiber impregnated with epoxy resin, which is not particularly limited herein.

The composite cross arm 200 is fixedly connected and penetrated through the tower body 100 through the cross arm fitting 2100, specifically, the length of the cross arm fitting 2100 is greater than or equal to the width of the tower body 100, the composite cross arm 200 is bridged on the tower body 100 through the cross arm fitting 2100, and two ends of the composite cross arm 200 extend out of the tower body 100 and extend towards two sides of the tower body 100. Two end parts of the composite cross arm 200 are free ends, and are provided with wire hanging fittings which can be directly used for hanging wires.

The end part of the composite cross arm is fixedly connected to one point of the tower body through a connecting hardware fitting between the traditional composite cross arm and the tower body and is fastened through a bolt, so that stress is concentrated; and the stress between the composite cross arms positioned on the two sides of the tower body cannot be balanced mutually, and the stress respectively acts on the connecting positions of the composite cross arms and the tower body. In this embodiment, the composite cross arm 200 is arranged to penetrate through the tower body 100, and the stress of the composite cross arm 200 positioned at both sides of the tower body 100 can be balanced by using the whole body type cross arm structure, so that the connection hardware structure of the composite cross arm 200 and the tower body 100 is simplified to the greatest extent; and through the mode of erectting, increase the area of contact between compound cross arm 200 and body of the tower 100, optimize the atress, avoid fixing bolt to bear too big moment of flexure and have the risk of failure. In addition, the arrangement of the sleeve-type cross arm fitting 2100 also avoids direct contact between the insulator and the tower body 100, and avoids damage to the surface of the insulator due to contact stress, thereby avoiding reduction of the insulating property of the insulator.

In addition, since the dry arc distance depends on the distance between the end of the composite cross arm 200 and the nearest conductor, the end fitting in the conventional connection manner extends to the outside of the tower body 100 along the corridor width direction, in this case, the length of the end fitting also occupies the corridor width, and the corridor width of the whole transmission line is wide due to the conventional connection manner. In this embodiment, the length of the cross arm fitting 2100 may be adjusted according to actual needs, so as to control the length of the cross arm fitting 2100 extending out of the tower body 100, and in an extreme case, the metal part of the composite cross arm 200 may be completely disposed inside the tower body 100, so as to reduce the width of the corridor, and optimize the stress of the composite cross arm 100.

Since the cross arm fitting 2100 is directly sleeved on the outer periphery of the insulator, the overall length of the composite cross arm 200 depends on the length of the insulator, and when the length of the insulator is fixed, the length of the composite cross arm 200 is also fixed and cannot be adjusted. Therefore, in another embodiment, the composite cross arm 200 includes two composite insulators, the cross arm fitting 2100 is sleeved on the adjacent ends of the two composite insulators, and the composite cross arm 200 is bridged on the tower body 100 by the cross arm fitting 2100. That is, one end of each of the two composite insulators is fixedly connected to one of the cross arm fittings 2100 in a sealing manner, and the other end of each of the two composite insulators extends toward both sides of the tower body to form a free end for hanging a wire.

The length of the composite cross arm 200 in this form is not limited to the length of a single composite insulator, and the length of the whole composite cross arm 200 can be adjusted by adjusting the distance between the adjacent ends of two composite insulators, that is, by adjusting the length of the cross arm hardware fitting 2100 for sleeving the composite insulator, and simultaneously adjusting the insulation distance; the length of the composite cross arm 200 can be adjusted by adjusting the length of the cross arm fitting 2100. Greater flexibility is provided so that insulators of the same size can form composite cross arms 200 of different sizes that can be used on transmission towers 10 of different sizes.

Further, when two composite insulators in the same composite cross arm 200 do not abut against each other, the space between the two composite insulators in the cross arm fitting 2100 may not be filled with the insulating medium (i.e., the inside is air), or the space between the two composite insulators may be filled with the insulating medium, such as insulating gas or epoxy resin. The method is not particularly limited, and may be performed according to actual requirements.

In some application scenarios, the composite cross arm 200 only needs to have one end for hanging a wire, so the composite cross arm 200 may also include a composite insulator, and the cross arm hardware 2100 is directly sleeved on one end of the composite insulator. Similarly, the composite insulator includes an insulator and an umbrella skirt covering the periphery of the insulator, the cross arm hardware 2100 is fixedly sleeved on the periphery of one end of the insulator of the composite insulator, and the other end of the composite insulator is a free end and used for hanging a wire. Preferably, the position where the cross arm fitting 2100 is connected with the insulator is sealed and covered by a shed covering the periphery of the insulator, and one end of the cross arm fitting 2100, which is far away from the insulator, is sealed by a sealing material made of an insulating material such as rubber; thereby, the sealing connection between the cross arm hardware 2100 and the insulator is realized, and further, the overall insulation performance of the composite cross arm 200 is ensured. In this application scenario, the length of the cross arm hardware fitting 2100 sleeved on the composite insulator can also be adjusted according to actual requirements, so that the length of the composite cross arm 200 can be adjusted according to actual requirements, and the structural adaptability is improved.

Referring to fig. 2, a cross arm fitting 2100 of a composite cross arm 200 located above a tower body 100 is directly sleeved on one end of a composite insulator, and the other end is used for hanging a wire; a composite cross arm 200 located below the tower body 100 is inserted into the tower body 100 and extends to both sides of the tower body 100, and both ends thereof are used for hanging wires, so that three-phase wires can be hung. The composite cross arms 200 with different structures are combined, can be used for hanging wires with different numbers of phases, and can be flexibly selected according to actual working conditions.

As shown in fig. 3, in another embodiment, the transmission tower 10 includes not only the composite cross arm 200 but also a top phase cross arm 300, and the top phase cross arm 300 is vertically disposed at the top of the transmission tower 10. Specifically, an end flange 310 is arranged at one end of the top-phase cross arm 300 connected with the tower body 100, one end of the end flange 310 away from the top-phase cross arm 300 is a disc, a plurality of through holes are arranged on the disc, and the top-phase cross arm 300 is fixedly connected with a connecting hole on an angle steel at the top of the tower body 100 through a fastener after being matched with the connecting hole through the through hole, so as to be fixedly connected to the tower body 100. Preferably, the through holes in the disk are symmetrically located away from the center of the disk to optimize the force on the end flange 310. An end fitting is arranged at one end of the top phase cross arm 300 far away from the tower body 100 and used for supporting a wire. The top end of a top phase cross arm 300, and both ends of a composite cross arm 200 passing through the tower body 100 and extending to both sides of the tower body 100 can be used for hanging three-phase wires.

In summary, the following steps: this application utilizes whole body formula cross arm structure through running through compound cross arm in the body of the tower setting, and the maximum simplifies the link fitting structure that compound cross arm and body of the tower are connected to avoid fixing bolt to bear too big moment of flexure and have the inefficacy risk. The two ends of the two composite insulators are respectively sleeved with the cross arm hardware fitting, so that the insulation length of the composite cross arm is adjustable, the composite insulators and the cross arm hardware fitting of the same specification can be applied to power transmission towers of different specifications in different combination modes, and the applicability of the composite cross arm is improved.

In addition, the arrangement of the sleeve-type cross arm hardware fitting also avoids the direct contact between the composite insulator and the tower body, and avoids the surface damage of the composite insulator caused by contact stress, so that the insulating property of the composite insulator is weakened.

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. A transmission tower, comprising:

the horizontal section of the tower body is a quadrangle;

the composite cross arm comprises a cross arm hardware fitting, the cross arm hardware fitting is erected and fixed on the tower body, and two ends of the cross arm hardware fitting are fixed on two edges opposite to the quadrangle respectively.

2. The transmission tower of claim 1, wherein the cross arm fitting is provided with a fixing member fixed to the tower body.

3. The transmission tower of claim 2, wherein the cross arm fitting comprises a sleeve, and wherein the fixing member is an L-shaped slotted rib plate, and wherein the sleeve is located in a slot of the fixing member.

4. The transmission tower according to claim 1, wherein the composite cross arm extends through the tower body and towards both sides of the tower body.

5. The transmission tower according to claim 4, wherein the composite cross arm comprises a composite insulator, the cross arm hardware is hermetically fixed in the middle of the composite insulator, and both ends of the composite insulator are free ends for hanging a wire.

6. The transmission tower according to claim 4, wherein the composite cross arm comprises two composite insulators, one end of each of the two composite insulators is fixedly connected with two ends of the cross arm hardware fitting in a sealing manner, and the other end of each of the two composite insulators is a free end and is used for hanging a wire.

7. The transmission tower of claim 1, wherein the composite cross arm comprises a composite insulator having one end sealingly connected to the cross arm fittings and the other end being a free end for hanging a wire.

8. The transmission tower according to claim 1, further comprising a top-phase composite cross arm vertically fixed to the top of the tower body.

9. The transmission tower according to claim 1, wherein the composite cross arm comprises a composite insulator, the composite insulator comprises an insulator and a shed covering the periphery of the insulator, and the insulator is a hollow insulating tube or a solid core rod.

10. The transmission tower of claim 1, wherein the cross arm fitting has a length that is greater than or equal to a width of the tower body.