CN205335130U - GIS combined electrical apparatus earthing switch interlock - Google Patents

Abstract

The utility model discloses an interlocking device for a grounding switch of a GIS combined electrical appliance, which comprises a disconnector and a grounding switch; the grounding switch is installed under the disconnecting switch. The isolating switch includes a isolating switch housing, an isolating switch transmission shaft, a moving contact of the isolating switch, and a static contact of the isolating switch. The projection at the upper end of the interlocking stop shaft of the static contact of the grounding switch can be snapped into one of the plurality of grooves at the lower end of the drive shaft of the isolating switch. Because the utility model pushes the bump at the upper end of the interlocking stop shaft to engage in the groove at the lower end of the isolating switch drive shaft through the movement of the moving contact of the grounding switch moving contact, thereby preventing the movement of the isolating switch drive shaft and achieving grounding. In the closed state of the switch, the rotational movement of the transmission shaft of the disconnector is restricted, thereby restricting the closing of the disconnector.

Description

Interlocking device for grounding switch of GIS combined electric appliances

technical field

The utility model relates to a switchgear, in particular to an interlocking device for a grounding switch of a GIS combined electric appliance.

Background technique

In the power industry, GIS optimizes the primary equipment in a substation except for transformers, including circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, lightning arresters, busbars, cable terminals, and incoming and outgoing bushings. The design is organically combined into a whole. The advantages of GIS are small footprint, high reliability, strong security, and small maintenance workload. In the traditional GIS, the closing and opening of the isolating switch and the grounding switch mostly adopt electrical control, and the chain operation of the isolating switch and the grounding switch is carried out through electricity, which can only be operated when there is electricity, and the scope of application is small.

Utility model content

The purpose of this utility model is to provide an interlocking device for GIS combined electrical appliances grounding switch with reliable interlocking action, that is, when the isolating grounding switch interlocks the grounding switch, the isolating switch cannot be closed; , the isolating switch cannot be closed.

For achieving the above object, the technical solution of the utility model is:

The utility model is an interlocking device for a grounding switch of a GIS combined electric appliance, which comprises a disconnector and a grounding switch; the grounding switch is installed below the disconnector;

The isolating switch includes a isolating switch housing, a isolating switch transmission shaft, a moving contact of the isolating switch, and a static contact of the isolating switch; The isolating switch moving contact is connected. The isolating switch moving contact is movably nested on the isolating switch moving contact seat in the middle of the isolating switch housing and can move back and forth in the horizontal direction driven by the isolating switch drive shaft. The isolating switch The static contact is installed on one side of the isolating switch housing and is located on the moving track of the isolating switch moving contact, and can be in contact with the isolating switch moving contact;

The grounding switch includes a grounding switch housing, a grounding switch movable contact, and a grounding switch static contact; the grounding switch housing is fixedly installed on the bottom of the isolating switch housing, and the grounding switch static contact is fixedly installed on the isolating switch At the bottom of the moving contact seat, the moving contact of the earthing switch is installed in the casing of the earthing switch and is located below the static contact of the earthing switch. The moving contact of the earthing switch can move up and down in the vertical direction and abut against the static contact of the earthing switch;

The grounding switch static contact includes a grounding switch static contact seat, an interlock stop shaft, a positioning pin, a return spring, a stop pressure spring, and a pressure plate, and the grounding switch static contact seat is fixed on the bottom of the isolating switch movable contact. The locking shaft is movably set in the stepped shaft hole of the static contact seat of the grounding switch and can move up and down in the vertical direction. A long hole chute is arranged on the upper part of the interlocking stopping shaft, and the gap of the long hole chute is sleeved in the On the positioning pin, the positioning pin is fixedly installed in the stepped shaft hole of the static contact seat of the grounding switch. The upper end of the interlocking stop shaft is provided with a bump, and the lower end of the isolating switch transmission shaft is designed with multiple grooves. The upper end of the interlocking stop shaft The bump can be snapped into one of the multiple grooves at the lower end of the isolating switch drive shaft; the return spring is sleeved on the interlock stop shaft and the two ends of the return spring respectively lean against the hanging platform of the interlock stop shaft and On the stepped surface of the grounding switch static contact seat ladder shaft hole, the upper end of the stop pressure spring leans against the bottom surface of the interlock stop shaft, and the lower end of the stop pressure spring leans against the pressure plate.

After adopting the above scheme, because the utility model pushes the bump at the upper end of the interlocking stop shaft to engage in the groove at the lower end of the isolating switch drive shaft through the closing operation of the moving contact of the grounding switch, the movement of the moving contact prevents the drive shaft of the isolating switch from When the movement of the grounding switch is reached, the rotational movement of the transmission shaft of the disconnector is limited, thereby limiting the closing of the disconnector.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Description of drawings

Fig. 1 is the opening state diagram of the grounding switch of the present utility model;

Fig. 2 is a closing state diagram of the grounding switch of the present invention;

Fig. 3 is a partial enlarged view at A of Fig. 1;

Fig. 4 is a partial enlarged view at B of Fig. 2;

Fig. 5 is a schematic diagram of cooperation between the bump at the upper end of the interlocking stop shaft of the moving contact of the grounding switch and the groove at the lower end of the drive shaft of the isolating switch in the opening state of the utility model;

Fig. 6 is a schematic diagram of cooperation between the bump at the upper end of the interlocking stop shaft of the moving contact of the grounding switch and the groove at the lower end of the drive shaft of the isolating switch in the closed state of the utility model;

Fig. 7 is a bottom schematic diagram of the transmission shaft of the isolating switch of the present invention.

detailed description

As shown in Fig. 1 and Fig. 2, the utility model is a grounding switch interlocking device of a GIS combined electrical appliance, which includes a disconnector 1 and a grounding switch 2.

The grounding switch 2 is installed below the isolating switch 1 . The isolating switch 1 realizes opening and closing of the isolating switch by driving the isolating switch moving contact 13 to reciprocate and rectilinearly move through the isolating switch transmission shaft 12 rotating the gear forward and backward.

The disconnector 1 includes a disconnector housing 11 , a disconnector drive shaft 12 , a disconnector movable contact 13 and a disconnector static contact 14 . The isolating switch transmission shaft 12 penetrates the isolating switch housing 11 from above and the penetrating end of the isolating switch transmission shaft 12 is connected with the isolating switch moving contact 13, and the isolating switch moving contact 13 is movably sleeved on the The isolating switch moving contact seat 15 in the middle of the isolating switch housing 11 can move back and forth in the horizontal direction driven by the isolating switch transmission shaft 12. The isolating switch static contact 14 is installed on one side of the isolating switch housing 11 and is located On the moving track of the switch movable contact 13, it can abut against the isolating switch movable contact 13.

The earthing switch 2 includes an earthing switch housing 21 , an earthing switch moving contact 22 , and an earthing switch static contact 23 . The earthing switch housing 21 is fixedly installed on the bottom of the isolating switch housing 11, the grounding switch static contact 23 is fixedly installed on the bottom of the isolating switch movable contact seat 15, and the earthing switch moving contact 22 is installed on the earthing switch housing 21 Inside and below the static contact 23 of the grounding switch, the movable contact 22 of the grounding switch can move up and down in the vertical direction to abut against the static contact 23 of the grounding switch.

As shown in FIGS. 3-6 , the grounding switch static contact 23 includes a grounding switch static contact seat 231 , an interlock stop shaft 232 , a positioning pin 233 , a return spring 234 , a stop pressure spring 235 , and a pressure plate 236 . The grounding switch static contact seat 231 is fixed on the bottom of the isolating switch movable contact 13, and the interlock stop shaft 232 is movably nested in the stepped shaft hole 2311 of the grounding switch static contact seat 231 and can move up and down in the vertical direction. The upper part of the interlocking stop shaft 232 is provided with a long hole chute 2321, and the long hole chute 2321 is sleeved on the positioning pin 233, and the positioning pin 233 is fixedly installed in the stepped shaft hole 2311 of the grounding switch static contact seat 231 , the positioning pin 233 is limited by the long hole chute 2321 to slide within a certain range, and the interlocking stop shaft 232 is limited by the positioning pin 233 and cannot rotate. The lower end is designed with a plurality of grooves 121 (as shown in FIG. 7 ), the number of the plurality of grooves 121 is N equally divided grooves, N is a natural number greater than 2, and the protrusion 2322 on the upper end of the interlocking stop shaft 232 can be Clamped on one of the multiple grooves 121 at the lower end of the isolating switch drive shaft 12, the bump 2322 and the groove 121 are designed for clearance fit, and the trapezoidal concave-convex meshing design on both sides facilitates the insertion of the bump 2322 into the groove 121 and is reliable. engage. The return spring 234 is sleeved on the interlock stop shaft 232, and the two ends of the return spring 234 respectively lean against the hanging platform of the interlock stop shaft 232 and the ladder of the grounding switch static contact seat 231 stepped shaft hole 2311. On the surface, the return spring 234 can reset the interlock stop shaft 232 after the interlock is released, and break away from the locked position; the upper end of the stop pressure spring 235 leans against the bottom surface of the interlock stop shaft 232 to stop The lower end of the pressure spring 235 leans against the pressure plate 236 , and the stop pressure spring 235 provides the engagement pressure of the stop device and the isolating switch transmission shaft 12 , and overcomes the reaction force of the return spring 234 . The closing movement and the final closing position of the earthing switch moving contact 22 provide an active force and an active force fulcrum for the stop pressure spring 235 .

Working principle of the utility model:

As shown in Figure 1, Figure 4, and Figure 6, when the grounding switch 2 is closed: the moving contact 22 of the grounding switch moves and inserts into the static contact 23 of the grounding switch, and the end of the static contact 23 of the grounding switch contacts and compresses the pressure plate 236, The stop pressure spring force of the stop pressure spring 235 is greater than the force produced by the back-moving spring 234, and the stop pressure spring 235 promotes the interlock stop shaft 232 to move along the long hole chute 2321 until the bump on the interlock stop shaft 232 2322 is inserted into the groove 121 at the end of the drive shaft 12 of the disconnector. The protrusion 2322 cooperates with the groove 121 to make the interlock stop shaft 232 and the isolating switch transmission shaft 12 integrated in the direction of rotation. The interlock stop shaft 232 is limited and cannot rotate, and the isolating switch 1 cannot be closed, so that the isolating switch 2 is interlocked when the grounding switch 1 is closed. When the grounding switch 2 is opened, the moving contact 22 of the grounding switch moves in the opposite direction and breaks away from the contact with the pressure plate 236, and the interlocking stop shaft 232 breaks away from the groove at the end of the drive shaft 12 of the isolating switch under the action of the return spring 234. 121. Release the restriction on the isolation switch drive shaft 12, and the grounding switch 2 releases the restriction on the closing operation of the isolation switch 1.

The key point of the utility model is that the isolating switch and the grounding switch realize linkage through the cooperation of the projection on the interlock stop shaft and the groove on the isolating switch drive shaft. The closing position and the opening position of the moving contact of the earthing switch respectively trigger and release the coordination, so that when the earthing switch is closed, the operation of the isolating switch is limited and cannot be closed; when the earthing switch is opened, the restriction is released.

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited with this, that is, the equivalent changes and modifications made according to the patent scope of the utility model and the content of the specification should still belong to the utility model. Within the scope covered by the utility model patent.

Claims (2)

1. a GIS combination electric appliance ground switch interlocking device, it is characterised in that: include isolation switch and earthed switch；Described earthed switch is arranged on the lower section of isolation switch；

Described isolation switch includes isolation switch case, isolation switch power transmission shaft, isolation switch movable contact, static contact isolation switch；Isolation switch power transmission shaft penetrates the end that penetrates of isolation switch case and isolation switch power transmission shaft and is connected with isolation switch movable contact from top, isolation switch movable contact is nested with in a movable manner on the isolation switch moving contact seat of isolation switch housing central section and can move back and forth in the horizontal direction under the drive of isolation switch power transmission shaft, static contact isolation switch is arranged on the side of isolation switch case and is positioned on the motion track of isolation switch movable contact, can be abutted against with isolation switch movable contact；

Described earthed switch includes earthed switch housing, moving contact of grounding switch, static contact of grounding switch；Described earthed switch housing is fixedly mounted on the bottom of isolation switch case, static contact of grounding switch is fixedly mounted on the bottom of isolation switch moving contact seat, moving contact of grounding switch is arranged in earthed switch housing and is positioned at the lower section of static contact of grounding switch, moving contact of grounding switch can be lower mobile in the vertical direction, is abutted against with static contact of grounding switch；

Described static contact of grounding switch includes earthed switch static contact seat, interlocking braking roll, back-moving spring, stop compression spring, earthed switch static contact seat is fixed on the bottom of isolation switch movable contact, interlocking braking roll activity is nested with in the ladder axis hole of earthed switch static contact seat and can be lower mobile in the vertical direction, interlocking braking roll upper end is provided with projection, the power transmission shaft lower end design of isolation switch has multiple groove, and the projection of interlocking braking roll upper end can be connected to keeps apart closed in the multiple groove in power transmission shaft lower end；Back-moving spring is socketed in interlocking braking roll and the two ends of back-moving spring act against on the hanging platform of interlocking braking roll and on the cascaded surface of earthed switch static contact seat ladder axis hole respectively, and the upper end of stop compression spring acts against the bottom surface of interlocking braking roll。

2. GIS combination electric appliance ground switch interlocking device according to claim 1, it is characterised in that: described static contact of grounding switch also includes alignment pin and pressing plate；Being provided with elongated hole chute on the top of interlocking braking roll, this elongated hole chute gap is socketed on alignment pin, and alignment pin is fixedly mounted in the ladder axis hole of earthed switch static contact seat；The lower end of described stop compression spring acts against on pressing plate。