CN206128798U - Cat head tower suitable for single time overhead line cable T connects - Google Patents

Abstract

A cat head tower suitable for T-connection of single-circuit overhead line cables, including a tower body, a ground wire cross arm, a middle phase conductor cross arm, a side phase conductor cross arm, an upper layer cable auxiliary cross arm, and a lower layer cable auxiliary cross arm; The above-mentioned ground wire cross arm is located at the top of the tower body, and two layers of cross arms are set in the direction of the vertical line to suspend the ground wire; the middle phase wire cross arm is located below the ground wire cross arm, and the upper part of the middle phase wire cross arm is fixed with V-shaped hanging Suspend the middle-phase conductor, and set double I-type cable down-lead terminals below the suspension point of the inner conductor of the middle-phase conductor across the arm. Beneficial effects of the utility model: the cat head tower suitable for single-circuit overhead line cable T-connection adopts a base tower to realize cable T-connection, the construction cost is low, the occupied area is small, and the force impact on adjacent pole towers is relatively large Small, does not change the original line arrangement, usually does not need to transform the adjacent tower, and is suitable for the construction of adjacent straight towers and strain towers.

Description

A cat head tower suitable for single-circuit overhead line cable T-connection

technical field

The utility model relates to the technical field of high-voltage transmission lines, in particular to a cat head tower suitable for T-connection of single-circuit overhead line cables.

Background technique

At present, existing solutions in the prior art usually adopt a base double-circuit cable terminal tower, which is usually arranged in a drum shape, and a layer of auxiliary cross-arm is added below the lower conductor cross-arm. In the single-circuit overhead line cable T connection project, use the three-layer conductor cross arm on one side of the double-circuit terminal tower to suspend the conductor, use the conductor cross arm and auxiliary cross arm to suspend the cable terminal, and lead the conductor through the jumper To the hanging string of the cable terminal, the lightning arrester and the connection of the cable head, so as to realize the T connection of the overhead line cable.

The double-circuit tension pole tower is used to realize the T connection, the construction cost is high, and the tower base occupies a large area. The vertical arrangement of the wire suspension points at the T connection is different from the conventional triangular or upper-shaped arrangement, resulting in adjacent straight-line towers. The wire suspension string deviates from the vertical state. When the electrical clearance does not meet the requirements, the adjacent tower needs to be rebuilt, which greatly increases the construction cost and floor area.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a cat head tower suitable for single-circuit overhead line cable T-connection. A base tower is used to realize cable T-connection, and the construction cost is low, and the occupied area is small. Adjacent towers are less affected by force, and the original line arrangement is not changed. Usually, no transformation of adjacent towers is required, and it is suitable for the construction of adjacent straight towers and tension towers.

The technical solution adopted by the utility model to solve the problems of the technologies described above is;

A cat head tower suitable for T-connection of single-circuit overhead line cables, including a tower body, a ground wire cross arm, a middle phase conductor cross arm, a side phase conductor cross arm, an upper cable auxiliary cross arm, and a lower cable auxiliary cross arm.

The ground wire cross arm is located at the top of the tower body, and two layers of ground wire cross arms are arranged in the direction of the vertical line for hanging the ground wire; the middle phase wire cross arm is located below the ground wire cross arm, and the upper part of the middle phase wire cross arm is fixed V The middle-phase conductor is suspended by type suspension series, and the double I-type cable down-conductor terminal is set under the suspension point of the inner conductor of the middle-phase conductor cross-arm; V-shaped suspension strings hang the side-phase conductors; the upper cable auxiliary cross-arms are arranged on both sides of the tower in parallel to the line direction, and the two-side cross-arms are arranged on the same layer as the side-phase conductor cross-arms, which are used to fix the upper end of the B-shaped cable down-lead terminal; the lower layer The cable auxiliary cross arm is parallel to the direction of the line, and the two side cross arms are arranged, which are located under the upper layer of the cable auxiliary cross arm, and are used to fix the lower part of the B-shaped cable down-lead terminal.

The middle-phase wire is hung on the upper part of the middle-phase wire cross-arm to fix the V-shaped hanging string, and is led to the double I-type cable down-lead terminal in the middle-phase wire cross-arm through a jumper wire; the side-phase wire is hung on the side-phase wire The V-shaped suspension string is fixed on the cross-arm, and is led to the D-shaped cable down-lead terminal between the upper cable auxiliary cross-arm and the lower cable auxiliary cross-arm through jumper wires.

The double I-type cable down-conductor terminal is composed of a seat-type cable head and a seat-type lightning arrester.

The BU-shaped cable down-conductor terminal is composed of a cable head, a string of hanging insulators and a lightning arrester.

Beneficial effects of the utility model: a cat head tower suitable for single-circuit overhead line cable T-connection, using a base tower to realize cable T-connection, low construction cost, small footprint, and impact on adjacent towers Smaller, does not change the original line arrangement, usually does not need to transform the adjacent towers, and is suitable for the construction of adjacent straight towers and strain towers.

Description of drawings

Further description will be given below in conjunction with the accompanying drawings and embodiments.

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

Fig. 2 is the side structural representation of the utility model;

Fig. 3 is the wiring schematic diagram of the present utility model;

Fig. 4 is a top view of the wiring of the present utility model.

detailed description

As shown in Figure 1-Figure 4, the cat head tower suitable for T-connection of single-circuit overhead line cables consists of tower body 1, ground wire cross arm 2, middle phase wire cross arm 3, side phase wire cross arm 4, and V-shaped suspension String 5, upper layer cable auxiliary cross arm 6, lower layer cable auxiliary cross arm 7, BU-shaped cable down-lead terminal 8, double I-type cable down-lead terminal 9.

The ground wire cross arm 2 is located at the top of the tower body 1, and two layers of cross arms are arranged in the direction of the vertical line for hanging the ground wire; the middle phase wire cross arm 3 is located below the ground wire cross arm 2, and the middle phase wire cross arm 3 is The upper fixed V-shaped suspension string 5 suspends the middle phase conductor 10, and the double I-type cable down-lead terminal 9 is arranged below the inner conductor suspension point of the middle phase conductor cross arm 3; the side phase conductor cross arm 4 is vertically overhead under the middle phase conductor cross arm 3 The direction of the transmission line is provided with cross arms on both sides, and the fixed V-shaped suspension string 5 is used to suspend the side-phase conductors; the auxiliary cross-arms 6 of the upper layer cables are arranged parallel to the line direction on both sides of the tower body 1, and are set on the same layer as the cross-arms 4 of the side-phase conductors. It is used to fix the upper end 8 of the B-shaped cable down-lead terminal; the lower cable auxiliary cross-arm 7 is provided with two cross-arms parallel to the line direction, located below the upper-layer cable auxiliary cross-arm 6, and is used to fix the lower part of the B-shaped cable down-lead terminal 8.

The middle-phase conductor 10 is suspended on the upper fixed V-shaped hanging string 5 inside the cross-arm 3 of the middle-phase conductor, and is led to the lower terminal 9 of the double I-type cable in the cross-arm 3 of the middle-phase conductor through a jumper wire; the side-phase conductor Suspended on the side-phase wire cross-arm 4 to fix the V-shaped suspension string 5, and lead to the down-lead terminal 8 of the cable between the upper cable auxiliary cross-arm 6 and the lower cable auxiliary cross-arm 7 through jumper wires.

The use of V-shaped hanging strings 5 can prevent the wind deflection and vibration of the wires, and effectively fix the wires.

The double I-type cable down-conductor terminal 9 is composed of a seat-type cable head and a seat-type lightning arrester.

The BU-shaped cable down-conductor terminal 8 is composed of a cable head, a suspension insulator string and a lightning arrester.

Cross-arm spacing, length and other parameters are designed and determined comprehensively considering conditions such as electrical clearance, cable bending, terminal arrangement, and facility parameters.

The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, those skilled in the art can understand that the utility model is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teaching of the utility model, and these variations and modifications all fall within the scope of the utility model. within the scope of protection.

Claims (4)

1. A cat head tower suitable for T-connection of single-circuit overhead line cables, characterized in that it includes tower body, ground wire cross arm, middle phase conductor cross arm, side phase conductor cross arm, upper cable auxiliary cross arm, lower layer Cable auxiliary cross arm; the ground wire cross arm is located at the top of the tower body, and two layers of cross arms are arranged in the direction of the vertical line; the middle phase wire cross arm is located below the ground wire cross arm, designed according to the cat head shape, and the inner upper part of the middle phase wire cross arm Fixed V-shaped hanging strings to suspend the middle-phase conductors, set double I-type cable down-lead terminals below the suspension points of the inner conductors of the middle-phase conductor crossarms; the side-phase conductor crossarms are located below the middle-phase conductor crossarms and vertically set two crossarms in the direction of the overhead transmission line , fixed V-shaped suspension strings to hang the side-phase conductors; the upper cable auxiliary cross-arms are arranged parallel to the line direction on both sides of the tower body, and are set on the same layer as the side-phase conductor cross-arms, which are used to fix the upper end of the B-shaped cable down-lead terminal ; The auxiliary cable arm of the lower layer is parallel to the direction of the line, and the cross arm is arranged on both sides, which is located under the auxiliary cable arm of the upper layer. 2. A kind of cathead tower suitable for T-connection of single-circuit overhead line cables according to claim 1, characterized in that, the middle-phase conductor is suspended on the upper part of the middle-phase conductor cross-arm to fix the V-shaped suspension string, through The jumper leads to the double I-type cable down-lead terminal in the cross arm of the middle phase wire; the side phase wire is suspended on the side phase wire cross arm to fix the V-shaped suspension string, and is wound to the auxiliary cross arm of the upper layer cable and the lower layer through the jumper wire The B-shaped cable down-lead terminal between the auxiliary cross-arms of the cable. 3. A cat head tower suitable for T-connection of single-circuit overhead line cables according to claim 1, characterized in that the double I-type cable down-conductor terminal is composed of a seat-type cable head and a seat-type arrester. 4. A kind of cathead tower suitable for T-connection of single-circuit overhead line cables according to claim 1, characterized in that, the down-conductor terminal of the D-shaped cable is composed of a suspension insulator string, a lightning arrester and a cable head.