CN102957096B - Gap adjustment mechanism of 500kV pure air gap arrester - Google Patents

Abstract

The invention is specifically a gap adjustment mechanism for a 500kV pure air gap arrester, which solves the problems of relatively complicated installation of the pure air gap arrester and difficult adjustment of the gap distance. The invention utilizes a gap adjustment mechanism including a coarse adjustment part and a fine adjustment part to realize discontinuous or continuous adjustment of the distance between the upper electrode of the discharge gap and the lower electrode of the discharge gap; the structure is reasonable, the installation is convenient, the use is easy and the reliability is high.

Description

Gap adjustment mechanism of 500kV pure air gap arrester

technical field

The invention relates to the field of lightning arresters, in particular to a gap adjustment mechanism for a 500kV pure air gap lightning arrester.

Background technique

Since the 500kV transmission lines at home and abroad in the 1990s, lightning arresters have been used as lightning protection devices, and good results have been achieved. Usually conductor (12) is to utilize line insulator (13) to hang below pole tower cross arm (14). There are two structural forms of the arrester: one is the insulator support gap type; the other is the pure air gap type. Both types of surge arresters have their own advantages and disadvantages. In terms of its electrical performance, operational stability and operational detection, the pure air gap arrester is far superior to the composite insulator support gap type. Since any abnormal fault arrester will not affect the safe operation of the system, pure air gap type is widely used abroad. There is no composite insulator supported arrester even in the IEC standard. However, due to the relatively complicated installation of the pure air gap arrester, the adjustment of the gap distance is difficult, which brings certain difficulties to the use.

Contents of the invention

In order to solve the problems that the installation of pure air gap arrester is relatively complicated and the adjustment of gap distance is difficult, the invention provides a gap adjustment mechanism of 500kV pure air gap arrester.

The present invention is realized by adopting the following technical scheme: 500kV pure air gap lightning arrester gap adjustment mechanism, including a lightning arrester fixing upper splint and several lightning arrester fixing lower splints fixed on the cross arm of the pole tower, the left end of the lightning arrester fixing upper splint is provided with a discharge counter, and the lightning arrester There is a cantilever protruding from the left end of the fixed upper splint, the main body of the arrester is hung under the cantilever, and the upper electrode of the discharge gap is fixed under the body of the arrester. There are several C-shaped adjustment blocks between the main body of the arrester and the upper electrode of the discharge gap, and the upper electrode of the discharge gap A gap bar is fixed on the lower wire, and the lower electrode of the discharge gap is fixed on the gap bar. The lower electrode of the discharge gap includes a lower electrode support plate supported above the gap bar. The lower electrode support plate is supported by a height adjustment bolt to support the lower electrode discharge rod. The support plate, the lower electrode discharge rod is fixed on the support plate with the lower electrode discharge rod.

The adjustment mechanism is divided into two parts, several C-shaped adjustment blocks between the main body of the arrester and the upper electrode of the discharge gap are used as the coarse adjustment part, and the height of the upper electrode of the discharge gap is adjusted by changing the number of C-shaped adjustment blocks; the height adjustment bolt is used as the fine adjustment part The height of the lower electrode discharge rod can be finely adjusted continuously by turning the height adjustment bolt; thereby realizing the adjustment of the discharge gap. The number of C-shaped blocks is determined according to the calculation, and the height of the height adjustment bolt is determined according to the calculation. After the distance is adjusted properly, the height adjustment bolt is locked.

The beneficial effects of the present invention are as follows: the distance between the upper electrode of the discharge gap and the lower electrode of the discharge gap is realized intermittently or continuously by using a gap adjustment mechanism including a coarse adjustment part and a fine adjustment part. The invention has the advantages of reasonable structure, convenient installation, easy use and high reliability.

Description of drawings

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

Fig. 2 is a top view structural schematic diagram of Fig. 1;

Fig. 3 is a structural schematic diagram of the electrode gap fine-tuning mechanism under the discharge gap.

In the figure: 1-Surge arrester fixed upper splint, 2-Surge arrester fixed lower splint, 3-Surge arrester main body, 4-Discharge gap upper electrode, 5-Discharge gap lower electrode, 6-Discharge counter, 7-C-type adjustment block, 8- Cantilever, 9-lower electrode support plate, 10-gap rod, 11-height adjustment bolt, 12-wire, 13-line insulator, 14-tower cross arm, 15-lower electrode discharge rod, 16-lower electrode discharge rod support plate .

Detailed ways

500kV pure air gap lightning arrester gap adjustment mechanism, including a lightning arrester fixed upper splint 1 and several lightning arrester fixed lower splints 2 fixed on the cross arm 14 of the tower, the left end of the lightning arrester fixed upper splint 1 is provided with a discharge counter 6, and the lightning arrester fixed upper splint 1 left end There is a cantilever 8 protruding outward, the main body of the arrester 3 is hung under the cantilever 8, the upper electrode 4 of the discharge gap is fixed under the main body of the arrester 3, and several C-shaped adjustment blocks 7 are arranged between the main body of the arrester 3 and the upper electrode 4 of the discharge gap. A gap rod 10 is fixed on the wire 12 below the upper electrode 4 of the discharge gap, and a lower electrode 5 of the discharge gap is fixed on the gap rod 10. The lower electrode 5 of the discharge gap includes a lower electrode support plate 9 supported on the gap rod 10, and the lower electrode supports A lower electrode discharge rod support plate 16 is supported on the plate 9 by height adjustment bolts 11 , and a lower electrode discharge rod 15 is fixed on the lower electrode discharge rod support plate 16 .

Claims (1)

1. the pure air gap arrester clearance adjustment mechanism of 500kV, it is characterized in that: comprise the fixedly fixing lower plate (2) of train wheel bridge (1) and some lightning arresters of a lightning arrester being fixed on cross arm of tower (14), lightning arrester fixedly train wheel bridge (1) left end is provided with discharge counter (6), lightning arrester is the protruding cantilever (8) that is provided with of train wheel bridge (1) left end fixedly, lightning arrester main body (3) has been hung in cantilever (8) below, lightning arrester main body (3) below is fixed with discharging gap top electrode (4), between lightning arrester main body (3) and discharging gap top electrode (4), be provided with some C type adjustment blocks (7), on the wire (12) of discharging gap top electrode (4) below, be fixed with gap rod (10), on gap rod (10), be fixed with discharging gap bottom electrode (5), discharging gap bottom electrode (5) comprises the bottom electrode supporting bracket (9) that is supported on gap rod (10) top, in bottom electrode supporting bracket (9), utilize Height Adjustment bolt (11) to be supported with bottom electrode discharging rod supporting bracket (16), in bottom electrode discharging rod supporting bracket (16), be fixed with bottom electrode discharging rod (15).

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