CN102005320B - Interlocking device between electric grounding switch and circuit breaker - Google Patents

Abstract

The invention discloses an interlocking device between an electrically operated grounding switch and a circuit breaker of a switchgear to solve the problem that the grounding switch and the circuit breaker cannot be locked when the grounding switch of the existing removable switchgear is electrically operated. In the present invention, an interlock shift block and a crank are fixed on the operating shaft by an elastic pin, a lever bracket and an interlock shaft are installed on the switch cabinet body, a lever mechanism is mounted on the lever bracket, and a small crank fixed by screws is installed on the interlock shaft , a shift fork, a return spring and an interlocking push plate, and the small crank is connected with the baffle through a sliding connecting plate. When the grounding switch is closed under the drive of the electric mechanism, the large shaft of the grounding switch drives the operating shaft to rotate through the linkage mechanism, and the interlocking shaft rotates with the interlocking push plate extending forward through the shift fork and lever mechanism to push the circuit breaker. The deadbolt plate on the chassis moves to lock the circuit breaker when the grounding switch is closed. The invention has the advantages of simple structure, precise action and high reliability, and does not affect the manual operation interlock when realizing the electric operation interlock.

Description

Electric earthing switch and circuit breaker interlocking device

technical field

The invention relates to an interlocking device for an electric grounding switch and a circuit breaker.

Background technique

With the rapid development of my country's electric power and switchgear manufacturing industry, armored removable AC metal-enclosed switchgear has been widely used. At the same time, people have put forward higher requirements for the intelligent operation, quality and safety performance of switchgear. more comprehensive requirements. Most of the switch products currently on the market, the grounding switch is manually operated, and the interlocking device between the circuit breaker and the grounding switch is mature and reliable. However, with the development of intelligent switchgear, the grounding switch is required to have the function of electric operation. The lock device can no longer meet the requirements for electric operation of the earthing switch.

Contents of the invention

The purpose of the present invention is to provide an interlocking device between an electrically operated earthing switch and a circuit breaker, so as to solve the problem that the manual operating earthing switch and circuit breaker interlocking device on the existing removable switchgear cannot be used for the electrically operated earthing switch .

The invention includes a baffle plate and a grounding switch operating shaft, an interlock shift block is fixed on the operating shaft by an elastic pin, a lever bracket and a lever mechanism are installed on the switch cabinet body, and a shift fork is fixed on the interlock shaft by screws Close the small crank and connect with the baffle through the sliding connecting plate.

In the present invention, when the grounding switch is closed, the interlocking block on the operating shaft drives the lever mechanism to rotate, and the lever mechanism moves the shift fork to drive the interlocking shaft to rotate, so that the interlocking push plate on the interlocking shaft extends forward to push the circuit breaker The deadbolt plate on the chassis of the circuit breaker moves to realize the locking of the circuit breaker when the grounding switch is closed. The pin shaft on the small crank slides in the long groove of the sliding connecting plate, and the baffle plate moves to the position of the grounding switch closed state by gravity. When the grounding switch is opened, the interlocking block on the operating shaft rotates in the opposite direction and disengages from the lever mechanism. The return spring on the interlocking shaft drives the interlocking shaft to rotate in the opposite direction. The shift fork drives the lever mechanism to reset, and the interlocking push plate Retract, the deadbolt plate on the circuit breaker chassis resets, and the circuit breaker is unlocked. The pin shaft on the small crank slides to the upper end of the long groove in the long groove of the sliding connecting plate and drives the sliding connecting plate and the baffle plate to move upwards, so that the baffle plate reaches the position of the grounding switch opening state.

The invention has the advantages of simple structure, precise action and high reliability, and does not affect the manual operation interlock when realizing the electric operation interlock.

Description of drawings

Fig. 1 is a schematic perspective view of the structure of the present invention;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is a schematic diagram of the connection between the interlock shift block, the lever mechanism and the interlock shaft in the present invention;

Fig. 5 is the right view of Fig. 4;

Fig. 6 is a front perspective view of Fig. 4;

Fig. 7 is the front view of the connection between the small crank and the baffle in the present invention;

Fig. 8 is a left view of Fig. 7;

Fig. 9 is a left perspective view of Fig. 7 .

Detailed ways

As shown in Figures 1 to 9, the present invention uses elastic pins on the operating shaft 11 to fix the interlock shift block 4 and the crank 13, and the lever bracket 8 and the interlock shaft 5 are installed on the switch cabinet body, and the lever bracket 8 Equipped with a lever mechanism 6, the interlock shaft 5 is equipped with a small crank 3 fixed by screws, a shift fork 7, a return spring 9 and an interlock push plate 10, and the small crank 3 is connected with the baffle plate 1 through a sliding connecting plate 2. When the grounding switch 16 is closed under the drive of the electric mechanism 14, the large shaft 15 of the grounding switch drives the operating shaft 11 to rotate through the link mechanism 12, and the interlocking shaft 5 rotates with interlocking through the shift fork 7 and the lever mechanism. The push plate 10 stretches forward to push the deadbolt plate on the chassis of the circuit breaker to move, so as to realize the locking of the circuit breaker when the grounding switch is closed.

The interlock shift block 4 and the lever mechanism 6 adopt a semi-connection mode, and only when the operating shaft 11 is turned in the clockwise closing operation, the interlock shift block 4 contacts the lever mechanism 6 and drives the lever mechanism 6 to rotate, and then The shift fork 7 drives the interlocking shaft 5 to rotate, so that the interlocking push plate 10 is stretched forward to push the deadbolt plate on the chassis of the circuit breaker to move to achieve the purpose of locking the circuit breaker.

The pin shaft 20 on the small crank 3 slides in the long groove of the sliding connecting plate 2 . When the earthing switch is closed, the small crank 3 rotates clockwise, and the bearing pin 19 rotates downwards, sliding in the long groove, and the baffle plate 1 is in a free state, and moves to the position of the earthing switch closed state by gravity. When the grounding switch is opened, the small crank 3 rotates counterclockwise, and the pin shaft 19 rotates upwards. The upper end of the long slot of the sliding connecting plate 2 slides first, and then drives the sliding connecting plate 2 and the baffle 1 to move upward, so that the baffle reaches the ground. The position of the switch open state.

Claims (3)

1. An interlocking device for an electric grounding switch and a circuit breaker, including a baffle plate and an operating shaft of the grounding switch, characterized in that an interlocking dial (4) is fixed on the operating shaft (11) with an elastic pin, and is installed in the switch cabinet The cabinet body is equipped with a lever bracket (8) and a lever mechanism (6), and a shift fork (7) and a small crank (3) are fixed on the interlock shaft (5) with screws, and the small crank (3) is connected by sliding The plate (2) is connected with the baffle (1). When the grounding switch is closed, the lever mechanism (6) is driven to rotate through the interlocking shift block (4) on the operating shaft (11), and the lever mechanism (6) toggles The fork (7) drives the interlocking shaft (5) to rotate, so that the interlocking push plate on the interlocking shaft extends forward, and pushes the deadbolt plate on the chassis of the circuit breaker to move, so as to realize the locking of the circuit breaker when the grounding switch is closed; When the grounding switch is opened, the interlocking block on the operating shaft rotates in the opposite direction and disengages from the lever mechanism. The return spring on the interlocking shaft drives the interlocking shaft to rotate in the opposite direction. The shift fork drives the lever mechanism to reset, and the interlocking push plate Retract, the deadbolt plate on the circuit breaker chassis resets, and the circuit breaker is unlocked. 2. The interlocking device of electric grounding switch and circuit breaker according to claim 1, characterized in that: the interlocking shift block (4) is fixedly connected with the operating shaft (11) by an elastic pin, and is connected with the lever during rotation The mechanism (6) contacts and drives the lever mechanism (6) to rotate, and the two ends of the lever mechanism (6) are respectively welded with lever pins (17, 18), and one of the lever pins (17) on the lever mechanism (6) is on the dial Slide in the chute of the fork (7). 3. The electric grounding switch and circuit breaker interlocking device according to claim 1 or 2, characterized in that a small crank pin (19) is welded on the small crank (3), and a small crank pin (19) is welded on the sliding connecting plate (2). Have long groove and be welded with sliding connecting plate pin (20) at one end, the small crank pin (19) of small crank (3) slides in the long groove on the sliding connecting plate (2), sliding connecting plate (2 ) is connected with the baffle (1) through the sliding connecting plate pin (20).

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