CN106555499A - Existing single loop strain insulator steel tower cable draws lower beam - Google Patents

Abstract

The existing single-circuit tension tower cable down conductor includes a shaft, an upper cross arm and a lower cross arm. V-shaped; the lower cross-arm is placed under the upper cross-arm, and the lower cross-arm faces the existing tension tower body and is arranged in a V-shape; double I-type cables are installed on the upper cross-arm Terminals, between the upper cross-arm and the lower cross-arm, there is a B-shaped cable terminal. Beneficial effects of the present invention: 1) The existing single-circuit tension tower cable down-conductor rod is suitable for construction close to the tension-resistant tower, only by connecting the wires at the down-conducting point; 2) Realizing single-circuit T-connection and disconnection 3) It does not change the force of the lower-leading side tension tower, avoiding the demolition and reconstruction of the old tower; 4) Compared with the newly built straight line and tension tower, it greatly reduces the construction cost and reduces the land occupation area.

Description

Existing single circuit tension tower cable down conductor

technical field

The invention relates to the technical field of high-voltage transmission lines, in particular to the existing single-circuit tension tower cable down-lead rod.

Background technique

In the cable down-conducting project of existing overhead transmission lines, when the down-conducting point of the cable is close to the existing tension tower, if the cable is guided down through the new tension tower, the newly-built tension tower will form a small isolation with the built-up tension tower. As a result, the tension on one side of the existing tension tower decreases, and the unbalanced tension on both sides increases, which makes it difficult to meet the conditions of use and needs to be dismantled and rebuilt; The waste is serious, the land occupation is large, and the overall aesthetics is poor. Therefore, a scheme of using the existing overhead transmission line tower cable to lead down is proposed to reduce the amount of engineering and avoid waste of resources.

Therefore, a method of cable down-conduction of the tension tower of the existing transmission line is proposed, using the existing tension tower to suspend the conductor, and building a base single-circuit cable down-conductor to achieve the goal.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides the existing single-circuit tension tower cable down-conductor rod, which is suitable for construction close to the tension tower, by connecting the conductor at the down-conductor point to the existing single-circuit tension tower cable down-conductor At the cable terminal on the pole, single-circuit T-connection, disconnection and re-connection are realized, without changing the stress on the tension tower on the lower lead side, avoiding the demolition and reconstruction of the old tower, and greatly reducing the The construction cost is reduced and the occupied area is reduced.

The technical solution adopted by the present invention to solve the problems of the technologies described above is:

The existing single-circuit tension tower cable down conductor includes a shaft, an upper cross arm and a lower cross arm. V-shaped; the lower cross-arm is placed under the upper cross-arm, and the lower cross-arm faces the existing tension tower body and is arranged in a V-shape; double I-type cables are installed on the upper cross-arm Terminals, between the upper cross-arm and the lower cross-arm, there is a B-shaped cable terminal.

The double I-type cable terminal is composed of a seat type cable head, a seat type arrester and a copper bar. Connected with copper bars.

The BU-shaped cable terminal is composed of a cable head, a suspension insulator string and a lightning arrester, and the cable head, the suspension insulator string and the lightning arrester are matched and assembled between the upper cross arm and the lower cross arm. The suspension insulator string is fixed on the upper cross arm, the arrester is fixed on the lower cross arm, one end of the cable head is fixed between the suspension insulator string and the arrester, and the other end is fixed in the middle of the lower cross arm.

Beneficial effects of the present invention: 1) The existing single-circuit tension tower cable down-conductor rod is suitable for construction close to the tension-resistant tower, only by connecting the wires at the down-conducting point; 2) Realizing single-circuit T-connection and disconnection 3) It does not change the force of the lower-leading side tension tower, avoiding 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 land occupation is reduced area.

Description of drawings

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

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the coordination wiring between the present invention and the existing single-circuit tension tower;

Fig. 3 is a schematic diagram of the connection between the present invention and the existing single-circuit tension tower single-circuit T-connection and re-connection scheme;

Fig. 4 is a schematic diagram of wiring between the present invention and the single-circuit breaking scheme of the existing single-circuit tension tower.

detailed description

As shown in Figure 1-2, the existing single-circuit tension tower cable down conductor includes a shaft 1, an upper cross arm 2 and a lower cross arm 3, and the upper cross arm 2 is placed on the top of the shaft 1. The cross arms on both sides are arranged facing the existing tension tower 6, which is V-shaped; The bearer is V-shaped; the upper cross-arm 2 is equipped with double I-type cable terminals 4, and the upper-level cross-arm 2 and the lower-level cross-arm 3 are installed with a B-shaped cable terminal 5.

The double I-type cable terminal 4 is composed of a seat type cable head, a seat type lightning arrester and a copper bar. The seat type cable head is placed on the top of the shaft 1, and the seat type arrester is placed on the upper cross arm 2. Block arresters are connected by copper bars.

The BU-shaped cable terminal 5 is composed of a cable head, a suspension insulator string and a lightning arrester, and the cable head, the suspension insulator string and the lightning arrester are assembled between the upper cross arm 2 and the lower cross arm 3.

The BU-shaped cable terminal 5 is composed of a cable head, a suspension insulator string and a lightning arrester, and the cable head, the suspension insulator string and the lightning arrester are assembled between the upper cross arm 2 and the lower cross arm 3. The suspension insulator string is fixed at the tip of the upper cross arm 2, the lightning arrester is fixed at the lower cross arm 3, one end of the cable head is fixed between the suspension insulator string and the arrester, and the other end is fixed at the middle of the lower cross arm 3.

The height of the shaft, the length of the cross-arm and the angle of the cross-arm are determined by the electrical distance between the B-shaped cable terminals 5, the electrical distance between the cross-arm and the wires suspended on the existing iron tower 6, the layout parameters of the B-shaped cable terminals 5, etc. Decide.

Example 1

As shown in Figure 3, the cable lower pole 7 and the existing single-circuit tension tower 6 single-circuit T-connection and reconnection scheme wiring schematic diagram; a new base is built between the single-circuit line tension tower 6 side phase lines and the existing The single-circuit tension tower cable down-lead pole, the middle phase wire is connected to the double I-type cable terminal at the upper cross arm 2, and the side phase wire is connected to the B-shaped cable terminal between the upper cross arm 2 and the lower cross arm 3 .

Example 2

As shown in Figure 4, the wiring schematic diagram of the cable lower pole 7 and the existing single-circuit tension tower 6 single-circuit breaking scheme; between the phase lines on both sides of the single-circuit line tension tower 6, a new base is built between the existing single-circuit resistance tower 6 The lower pole of the tension tower cable, the middle phase wire is connected to the cable terminal of the upper cross arm 2, the side phase wire is connected to the cable terminal between the upper cross arm 2 and the lower cross arm 3, and the tension tower 6 jumper is released at the same time open.

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

Claims (4)

1. existing single loop strain insulator steel tower cable draws lower beam, it is characterised in that including shaft, upper strata cross-arm and lower floor's cross-arm, institute The top that upper strata cross-arm is placed in shaft is stated, and both sides cross-arm is arranged towards existing anchor support tower body, in V-shape；Lower floor's cross-arm The lower section of upper strata cross-arm is placed in, and both sides cross-arm is arranged towards existing anchor support tower body, in V-shape；Install on the upper strata cross-arm There are double I types cable terminations, fore-telling font cable termination is installed between upper strata cross-arm and lower floor's cross-arm.

2. existing single loop strain insulator steel tower cable according to claim 1 draws lower beam, it is characterised in that described pair of I types electricity Cable terminal is made up of A seating end, A seating arrester and copper bar, and A seating end is placed in the top of shaft, and A seating arrester is put At the cross-arm of upper strata, A seating end is connected using copper bar with A seating arrester.

3. existing single loop strain insulator steel tower cable according to claim 1 draws lower beam, it is characterised in that the fore-telling font electricity Cable terminal is made up of end, suspension insulator and arrester, and the cooperation of end, suspension insulator and arrester is assemblied in Between upper strata cross-arm and lower floor's cross-arm ending.

4. existing single loop strain insulator steel tower cable according to claim 3 draws lower beam, it is characterised in that suspension insulator Upper strata cross-arm ending is fixed on, arrester is fixed on lower floor's cross-arm ending, and end one end is fixed on suspension insulator and keeps away Between thunder device, one end is fixed in the middle part of lower floor's cross-arm.