CN204343772U - Narrow base cable shoe steel tube tower under four return cable - Google Patents

Abstract

The purpose of the utility model is to solve the existing problems in the prior art, and to find a 220kV double-circuit open four-circuit cable underground narrow-base cable terminal steel pipe tower with a small footprint and simple layout. Including the tower body, the tower body includes the ground wire cross arm, the upper phase wire cross arm, the middle phase wire cross arm, the lower phase wire cross arm, and the cable terminal head from top to bottom. The wires on the upper phase wire cross arm pass through the drain wire Pass through the support insulator on the cross arm of the middle phase conductor, the support insulator on the cross arm of the lower phase conductor, and the support insulator on the outside of the tower body in turn, and then connect to the cable terminal on the outside. After passing through the support insulator of the lower phase conductor cross arm and the support insulator inside the tower body, it is connected to the inner cable terminal head. The 220kV double circuit can be opened into four circuits, and the floor space is small and the layout is simple.

Description

Four-circuit cable underground narrow base cable terminal steel pipe tower

technical field

The utility model relates to the field of electric power, in particular to a steel pipe tower with a narrow base cable terminal under a four-circuit cable.

Background technique

With the development of social economy and power grid technology, the application of 220kV high voltage cable lines will be more and more. At present, from the engineering examples at home and abroad, there are generally two types of cable terminal towers used when the 220kV double-circuit overhead line is broken into a four-circuit cable: one is to arrange two-base double-circuit cable terminal towers before and after the opening point, and two Two double-circuit cables are respectively led from the two-base double-circuit cable terminal towers; another type is that the two base cable terminal towers are arranged side by side, and the cable terminal platform is arranged between the steel pipe poles to install cable accessories. These two types have the problems of poor adaptability to the site, complex cable channel layout, large floor area and poor economy.

In the design of the cable terminal tower in the project, the method of adding a cable terminal installation platform to the original design tower is often used, and the cable terminal tower with double circuit breaking is four circuits due to the large number of equipment and complex device layout, especially the equipment size and electrical distance of 220kV line Both are large, and there are great technical difficulties in the structural design of the terminal tower in this way. There is no general design tower type for reference at home and abroad.

Utility model content

The purpose of the utility model is to solve the problems existing in the prior art, and to find a narrow-base cable terminal steel pipe tower with a small floor space and simple layout for four-circuit cables.

In order to achieve the above purpose, the utility model four-circuit cable lower ground narrow-base cable terminal steel pipe tower includes a tower body, and the two opposite sides of the tower body are connected with cross-arm structures, and the cross-arm structures are connected from above From top to bottom, it includes one layer of ground wire cross arm and three layers of wire cross arm. The front and rear wires of the wire cross arm are not connected. Conductor crossarm and lower phase conductor crossarm, support insulators are provided on the middle phase conductor crossarm and the lower phase conductor crossarm, several support insulators are provided on the tower body, and the lower part of the tower body There are several cable terminals, and the wires on the cross arm of the upper phase conductor pass through the support insulator on the cross arm of the middle phase conductor, the support insulator on the cross arm of the lower phase conductor, and the rear and outer sides of the support insulator on the outer side of the tower through the drain wire. The wires on the cross-arm of the middle-phase conductor pass through the supporting insulator of the lower-phase conductor cross-arm and the supporting insulator inside the tower body in turn through the drain wire, and then connect with the cable terminal on the inner side. The wire is led to the support insulator in the middle of the tower body and then connected to the cable terminal in the middle.

Preferably, the upper-phase conductor cross-arm and the middle-phase conductor cross-arm are connected to the support insulator through the support insulator support. By supporting the insulator support and supporting the insulator, the connection is more stable.

Preferably, the connection part of the supporting insulator support used to connect the upper phase wire cross arm or the middle phase wire cross arm is two parallel plates parallel to each other, and the two parallel plates are provided with first screw holes, so A second screw hole is provided on the rod used to support the insulator support on the cross arm of the upper phase conductor and the cross arm of the middle phase conductor. Such a structure makes it easier to install the supporting insulator support.

Preferably, the first screw hole and the second screw hole are connected by a hexagonal bolt, and one side edge of the first screw hole is provided with a first hexagonal bayonet corresponding to the head of the hexagonal bolt. The support insulator mounts can be directional adjusted upon request.

Preferably, the edge of the second screw hole is provided with a second hexagonal buckle corresponding to the first hexagonal bayonet, and the thickness of the first hexagonal bayonet is the same as the thickness of the second hexagonal bayonet The sum is the same as the thickness of the head of the hex bolt. Not only the support insulator support can be adjusted in direction, but also the support insulator support is more stable when connected to the steel pipe tower.

By implementing the utility model, the following beneficial technical effects can be obtained: 220kV double circuits can be opened into four circuits, and the occupied area is small and the arrangement is simple.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is a left view of the utility model.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with specific embodiments:

As shown in Figures 1 to 3, the narrow-base cable terminal steel pipe tower for the four-circuit cable includes the tower body 1, and the two opposite sides of the tower body 1 are connected with a cross-arm structure, and the cross-arm structure is from top to bottom. It includes one layer of ground wire cross arm 2 and three layers of wire cross arms in turn. The front and rear side wires of the wire cross arm are not connected. , the lower phase conductor cross arm 5, the middle phase conductor cross arm 4, the upper and lower phase conductor cross arms 5 are provided with support insulators 6, the tower body 1 is provided with several support insulators 6, and the tower body 1 is provided with several cables Terminal head 7, the wires on the cross arm 3 of the upper phase conductor pass through the support insulator 6 on the cross arm 4 of the middle phase conductor, the support insulator 6 on the cross arm 5 of the lower phase conductor, and the support insulator on the outside of the tower body 1 through the drain wire 6 and then connected to the outer cable terminal head 7, the wires on the middle phase wire cross arm 4 pass through the drain wire in turn through the support insulator 6 of the lower phase wire cross arm 5, the support insulator 6 inside the tower body 1, and the inner cable The terminal head 7 is connected, and the upper wire of the lower phase conductor cross arm 5 is led to the support insulator 6 in the middle of the tower body 1 and then connected to the cable terminal head 7 in the middle.

The present invention, through the research on the design of the 220 kV double-circuit breaking into four-circuit cables, uses a base cable terminal tower to realize the connection mode of double-circuit breaking into four-circuit cables, so that the double-breaking cable terminal The layout of the electrical equipment of the tower is reasonable and compact, convenient for construction and maintenance, less land occupation, simple structure, beautiful appearance, harmonious with the surrounding environment, creating better technical, economic and social benefits, and embodying the concept of "two types and three new" in principle.

In order to make the connection more stable and convenient, the upper phase conductor cross arm 3 and the middle phase conductor cross arm 4 are connected to the support insulator 6 through the support insulator 6 support, and the support insulator 6 support is used to connect with the upper phase conductor cross arm 3 or the middle phase The connection part of the wire cross arm 4 is two parallel pieces parallel to each other. The first screw hole is provided on the two parallel pieces. There is a second screw hole on the rod, the first screw hole and the second screw hole are connected by a hexagonal bolt, and a first hexagonal bayonet corresponding to the head of the hexagonal bolt is provided on the edge of the first screw hole. The edge of the second screw hole is provided with a second hexagonal buckle corresponding to the first hexagonal bayonet, and the sum of the thickness of the first hexagonal bayonet and the thickness of the second hexagonal bayonet is equal to the head of the hexagon bolt. same thickness. During use, the direction of the supporting insulator 6 support can be adjusted by adjusting the clamping position of the hexagonal bolt and the first hexagonal bayonet and the second hexagonal buckle.

By implementing the utility model, the following beneficial technical effects can be obtained: 220kV double circuits can be opened into four circuits, and the occupied area is small and the arrangement is simple.

The above is only a specific embodiment of the utility model, but the technical characteristics of the utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the utility model are all covered by the utility model. In the scope of the new patent.

Claims (5)

1. narrow base cable shoe steel tube tower under four return cable, comprise tower body (1), be oppositely arranged two sides of described tower body (1) are all connected with cross-arm structure, it is characterized in that, described cross-arm structure comprises one deck ground wire cross-arm (2) and three layer conductor cross-arms from top to bottom successively, before and after described wire cross-arm, side wire is not taken logical, described three layer conductor cross-arms are followed successively by phase conductor cross-arm (3) from top to bottom, middle phase conductor cross-arm (4), lower phase conductor cross-arm (5), described middle phase conductor cross-arm (4) above and on described lower phase conductor cross-arm (5) is equipped with supporting insulator (6), described tower body (1) is provided with several supporting insulators (6), described tower body (1) bottom is provided with some cable terminals (7), wire on upper phase conductor cross-arm (3) passes the supporting insulator (6) on middle phase conductor cross-arm (4) successively by drainage thread, supporting insulator (6) on lower phase conductor cross-arm (5), the supporting insulator (6) in tower body (1) outside is connected with the cable terminal (7) in outside afterwards, wire on middle phase conductor cross-arm (4) passes the supporting insulator (6) of lower phase conductor cross-arm (5) successively by drainage thread, the supporting insulator (6) of tower body (1) inner side is connected with the cable terminal (7) of inner side afterwards, the supporting insulator (6) that lower phase conductor cross-arm (5) upper conductor is guided in the middle of tower body (1) is connected with the cable terminal (7) of centre afterwards.

2. narrow base cable shoe steel tube tower under four return cable as claimed in claim 1, is characterized in that: described upper phase conductor cross-arm (3) is connected with supporting insulator (6) by supporting insulator (6) bearing with middle phase conductor cross-arm (4).

3. narrow base cable shoe steel tube tower under four return cable as claimed in claim 2, it is characterized in that: the connecting portion that described supporting insulator (6) bearing is used for being connected with upper phase conductor cross-arm (3) or middle phase conductor cross-arm (4) is the parallel plate that two panels is parallel to each other, described two panels parallel plate is provided with the first screw, for being provided with the second screw with the bar of supporting insulator (6) bearing on described upper phase conductor cross-arm (3) and middle phase conductor cross-arm (4).

4. narrow base cable shoe steel tube tower under four return cable as claimed in claim 3, it is characterized in that: described first screw is connected by hex bolts with the second screw, described first screw one lateral edges is provided with the first hexagon bayonet socket corresponding with the head of described hex bolts.

5. narrow base cable shoe steel tube tower under four return cable as claimed in claim 4, it is characterized in that: the second screw edge is provided with the second hexagon buckle corresponding with the first hexagon bayonet socket, described first hexagon bayonet socket thickness is identical with the head thickness of described second hexagon bayonet socket thickness sum and described hex bolts.