CN108616103A - A kind of cable for built single time anchor support draws lower facility - Google Patents

Abstract

The utility model relates to a cable down-conducting facility for an existing single-circuit tension tower. It consists of two parts: an independent platform and a down-leading pole tower. The support platform is set on the top of the support pole. It is composed of an "X"-shaped cross-arm and a "one"-shaped cross-arm. The angle between the direction of the transmission line is 45 degrees; there is a seat-type lightning arrester on the "one"-shaped cross-arm far away from the iron tower, and a seat-type cable terminal is installed on the "one"-shaped cross-arm close to the iron tower; the shaft is close to the built-up resistance For the tension tower, the support insulators are arranged in several layers equidistantly from the top of the shaft to the independent cap, and each layer is arranged on both sides perpendicular to the direction of the line, and on one side parallel to the direction of the line and facing away from the built tension tower. The present invention does not change the force of the down-lead side tension tower, avoids the demolition and reconstruction of the old tower, greatly reduces the construction cost, adopts the split structure of the independent cap and the down-lead tower, reduces the impact on the built line, and adopts the independent The bearing platform makes the position of the cable terminal lower, which is more convenient for operation and maintenance.

Description

A cable down-conducting facility for built single-circuit tension towers

【Technical field】

The invention relates to the technical field of high-voltage transmission lines, in particular to a cable down-conduction facility for an established single-circuit tension tower.

【Background technique】

In the actual project of cable lead-down of overhead transmission lines, due to the influence of line path, surrounding environment and other factors, the cable lead-down point may appear in the center of the line, near the built tower, etc., especially near the built tension tower. The new tension-type cable terminal tower and the built-up tension tower form a small isolated gap, which increases the unbalanced tension on both sides of the built-up tension tower, which is difficult to meet the use conditions and needs to be dismantled and rebuilt; the new linear cable terminal and the built-up The tensioned tower is affected by the mutual influence of the pole tower foundation, the distance between the two towers should not be too close, and the utilization rate of the newly built straight tower is not high, the waste of resources is serious, and the overall aesthetics is poor.

Therefore, in view of the demand for cable leads near the tension towers of the built overhead lines, considering the operation and maintenance of the cable terminals, a cable lead-off facility for the built single-circuit strain towers is proposed, which will have an impact on the built tension towers. On the basis of the minimum, the single-circuit line cable is led down.

【Content of invention】

The main purpose of the present invention is to provide a cable down-conductor facility for the built single-circuit tension tower, which is suitable for construction close to the tension tower, does not change the stress of the down-lead side tension tower, and avoids the demolition and reconstruction of the old tower Compared with the newly built straight line and strain towers, the construction cost is greatly reduced. The separate structure of the independent cap and the down-lead tower is adopted, and the separate construction reduces the impact on the existing lines. At the same time, the independent cap is used to make the cable terminal position relatively Low, more conducive to operation and maintenance.

In order to achieve the above object, the technical scheme that the present invention takes is:

A cable down-conduction facility for an established single-circuit tension tower, which consists of two parts: an independent cap and a down-conductor tower. The independent cap includes a support rod, a bracket platform, a seat-type cable terminal, and a seat-type lightning arrester. The support platform is set on the top of the support rod, and is composed of an "X"-shaped cross-arm and a "one"-shaped cross-arm. The font cross arm is located at the tip of the "X" cross arm, and the two side cross arms are arranged perpendicular to the direction of the transmission line. There is a seat type cable terminal on the shoulder;

The down-conductor tower includes a shaft and a post insulator, the shaft is close to the built tension tower, and the post insulators are equidistantly arranged in several layers from the top of the shaft to the independent cap, and each layer is arranged on both sides perpendicular to the line direction, parallel The direction of the line and the side facing away from the built tension tower are arranged.

Further, there are a total of three seat-type cable terminals, which are equidistantly distributed on the inner "one"-shaped cross arm of the support platform close to the built tension tower.

Further, there are three seat-type lightning arresters in total, which are equidistantly distributed on the outer "one"-shaped cross arm of the support platform away from the built tension tower.

Further, ladders are equidistantly arranged on both sides of the support rod.

Compared with the prior art, the present invention has the beneficial effects: 1) the special rod for the cable lead-off is suitable for the construction of the tension tower; 2) realizes multiple functions such as single-circuit T-connection, disconnection and re-connection; 3) does not change The force of the lower side tension tower is introduced to avoid the demolition and reconstruction of the old tower; 4) Compared with the newly built straight line and tension tower, the construction cost is greatly reduced and the floor space is reduced; 5) Compared with the dry cable terminal structure , the applicable voltage level is wider; 6) The split structure of the independent cap and the down-lead tower is adopted, and the construction is separated to reduce the impact on the built line; 7) The independent cap is used to make the position of the cable terminal lower, which is more conducive to operation and maintenance .

【Description of drawings】

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

Fig. 1 is the schematic diagram of the coordination of the present invention and the built single circuit tension tower;

Fig. 2 is a side view of the independent platform of the present invention;

Fig. 3 is a top view of the independent platform of the present invention.

【Detailed ways】

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Figure 1-3, a cable down-conduction facility for an established single-circuit tension tower consists of two parts: an independent cap and a down-conducting tower.

The independent platform includes a support rod 1 , a support platform 2 , a seat type cable terminal 3 , and a seat type lightning arrester 4 .

The support platform 2 is set on the top of the support bar 1, and is composed of an "X"-shaped cross arm and a "one"-shaped cross arm. The center of the "X"-shaped cross arm is located on the top of the support bar 1, and the angle with the direction of the transmission line is 45 degrees; The "one"-shaped cross-arm is located at the tip of the "X"-shaped cross-arm, and two cross-arms are arranged perpendicular to the direction of the transmission line.

The angle between the "X" type cross arm and the transmission line is 45 degrees. The upper part is used to support the "one" type cross arm, the seat type cable terminal 3, and the seat type lightning arrester 4. The center is located on the top of the shaft 1, providing for the shaft 1. The fulcrum; the "one"-shaped cross-arm is located at the tip of the "X"-shaped cross-arm, and the cross-arms on both sides are arranged perpendicular to the direction of the transmission line. Cable terminal 3 to reduce the distance between the cable and the iron tower. When the double-circuit tension tower breaking scheme has been built, the length of cable laying can be reduced and the project cost can be reduced.

There are three seat-type cable terminals 3 in total, which are equidistantly distributed on the inner "one"-shaped cross arm of the support platform 2 close to the built tension tower.

There are three seat-type lightning arresters 4 in total, which are equidistantly located on the outer "one"-shaped cross arm of the support platform 2 away from the built tension tower.

Ladders 5 are equidistantly arranged on both sides of the support rod 1, which is convenient for maintenance.

The down-conductor tower includes a shaft 5 and a post insulator 6, and the shaft 5 is close to the built tension tower to reduce the influence of the wind deflection of the wire.

The post insulators 6 are equidistantly arranged in several layers from the top of the shaft 5 to the independent bearing platform to prevent wind shock when the wires are led down. Each layer is arranged on both sides perpendicular to the line direction, and are respectively used to fix the down-conducted lines of the side-phase wires; The direction of the line and the side facing away from the built tension tower are arranged to fix the down-conductor line of the middle phase conductor.

The dimensions of the independent cap and the down-conductor tower are determined by the electrical distance between the seat-type cable terminal 3 and the seat-type arrester 4, the electrical distance between the facility and the wire of the built single-circuit strain tower, the parameters of the seat-type cable terminal 3, the seat-type Arrester 4 parameters, post insulator parameters and other decisions.

When the T-connection and re-connection scheme of the double-circuit tension tower has been built, refer to Figure 1, and build a base cable down-leading facility between the two circuits of the built-up double-circuit tension tower. When only one of them is led down , cancel the independent supporting platform and post insulator for the non-lead side line.

When the breaking plan of the double-circuit tension tower has been built, a base cable lead-off facility shall be built between the two circuits on both sides of the tension tower of the built double-circuit line, and the jumper of the tension tower of the built double-circuit line shall be built at the same time. Untie it, and when only one of them is led down, the independent platform and post insulators matching the non-leaded side line are cancelled.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (4)

1. A cable down-conducting facility for a built single-circuit tension tower, characterized in that: it consists of two parts, an independent cap and a down-conducting pole tower, and the independent cap includes a support rod, a support platform, and a seat type cable For terminal and seat arresters, the support platform is set on the top of the support rod, which is composed of an "X"-shaped cross arm and a "one"-shaped cross arm. 45 degrees; the "one"-shaped cross-arm is located at the tip of the "X"-shaped cross-arm, and the cross-arms on both sides are perpendicular to the direction of the transmission line. There is a seat type cable terminal on the "one" cross arm; The down-conductor tower includes a shaft and a post insulator, the shaft is close to the built tension tower, and the post insulators are equidistantly arranged in several layers from the top of the shaft to the independent cap, and each layer is arranged on both sides perpendicular to the line direction, parallel The direction of the line and the side facing away from the built tension tower are arranged. 2. The facility according to claim 1, characterized in that: there are three seat-type cable terminals in total, which are equidistantly distributed on the inner "one"-shaped cross arm of the support platform close to the built tension tower. 3. The facility according to claim 1, characterized in that there are three seat-type lightning arresters in total, equidistantly distributed on the "one"-shaped cross arm on the outer side of the support platform away from the built tension tower. 4. The facility according to claim 1, characterized in that: ladders are equidistantly arranged on both sides of the support rod.