CN220400504U - Plug-in circuit breaker with protective device - Google Patents

Abstract

The plug-in circuit breaker with the protection device comprises a circuit breaker body and a circuit breaker base, wherein the circuit breaker body is provided with contacts, the circuit breaker base is correspondingly provided with contact holes for inserting the contacts, the contact holes are divided into wire inlet side contact holes and wire outlet side contact holes, the wire inlet side contact holes are positioned at the upper part of the circuit breaker base, and the wire outlet side contact holes are positioned at the lower part of the circuit breaker base; a fixed base is further arranged above the circuit breaker base, a sliding baffle plate is vertically and slidably arranged in the fixed base, a movable swinging plate, a connecting rod and a spring are further arranged, the rear end of the movable swinging plate is hinged with the fixed base through a first hinge shaft, the front end of the movable swinging plate is hinged with the rear lower end of the connecting rod through a second hinge shaft, and the front upper end of the connecting rod is hinged with the sliding baffle plate through a third hinge shaft; the spring applies downward pressure to the movable swing plate. The utility model can ensure that an operator can not accidentally contact the incoming line side contact hole after the breaker body is pulled out of the breaker base, thereby avoiding accidents.

Description

Plug-in circuit breaker with protective device

Technical Field

The utility model belongs to the technical field of electrical equipment, and particularly relates to a plug-in circuit breaker with a protection device.

Background

Plug-in circuit breakers are commonly employed in some fixed-bay low-voltage switchgear assemblies in the electrical industry. As shown in fig. 1 and 2, the plug-in circuit breaker is composed of a circuit breaker body 1 and a circuit breaker base 2, the circuit breaker body 1 is provided with a contact 11, the circuit breaker base 2 is correspondingly provided with a contact hole for inserting the contact 11, the contact hole is divided into a wire inlet side contact hole 21 and a wire outlet side contact hole 22, wherein the wire inlet side contact hole 21 is positioned at the upper part of the circuit breaker base 2, and the wire outlet side contact hole 22 is positioned at the lower part of the circuit breaker base 2. The plug-in circuit breaker has the advantages that when the circuit breaker needs to be overhauled and maintained, an operator can conveniently take off the circuit breaker body 1 from the circuit breaker base 2 (namely, the contact 11 of the circuit breaker body is pulled out from the contact hole 21/22 of the circuit breaker base); after the overhaul and maintenance are finished, only the contact 11 of the breaker body is required to be reinserted into the contact hole of the breaker base, so that the use is very convenient. However, the existing plug-in circuit breaker still has the following defects: after the operator pulls out the breaker body from the breaker base, the contact holes on the breaker base are exposed, as shown in fig. 2, wherein the incoming line side contact holes 21 are electrified, which definitely presents a potential safety hazard, threatening the life safety of the operator. In practice, accidents of electric shock to operators after the molded case circuit breaker body is pulled out of the circuit breaker base have occurred in the industry.

Disclosure of Invention

The utility model aims to overcome the defects and provide a plug-in type circuit breaker with a protection device, which can ensure that an operator cannot accidentally contact a wire inlet side contact hole after the circuit breaker body is pulled out of a circuit breaker base so as to avoid accidents.

The aim can be achieved according to the following scheme: the plug-in circuit breaker with the protection device comprises a circuit breaker body and a circuit breaker base, wherein the circuit breaker body is provided with contacts, the circuit breaker base is correspondingly provided with contact holes for inserting the contacts, the contact holes are divided into wire inlet side contact holes and wire outlet side contact holes, the wire inlet side contact holes are positioned at the upper part of the circuit breaker base, and the wire outlet side contact holes are positioned at the lower part of the circuit breaker base; the circuit breaker is characterized in that a fixed base is further arranged above the circuit breaker base, a sliding baffle plate is vertically and slidably arranged in the fixed base, a movable swinging plate, a connecting rod and a spring are further arranged, the rear end of the movable swinging plate is hinged with the fixed base through a first hinge shaft, the front end of the movable swinging plate is hinged with the rear lower end of the connecting rod through a second hinge shaft, and the front upper end of the connecting rod is hinged with the sliding baffle plate through a third hinge shaft; the spring applies downward pressure to the movable swing plate;

when the sliding baffle moves upwards to the upper end of the vertical movement track, the vertical position of the sliding baffle is staggered from the vertical position of the contact hole at the inlet wire side; when the sliding baffle moves downwards to the lower end of the vertical movement track, the sliding baffle covers the incoming line side contact hole, the front lower section of the movable swinging plate is positioned right behind the upper part of the circuit breaker base, and the front lower section of the movable swinging plate is inclined from the rear upper part to the front lower part.

The lower surface of the front lower section of the movable swing plate is arc-shaped.

In the present application, when the front-rear direction is defined, the direction in which the contact of the breaker body is inserted into the contact hole of the breaker base is defined as the front.

The utility model has the following advantages and effects:

1. in the overhaul process, when the breaker body breaks away from the breaker base, under the action of spring pressure, the movable swing plate swings downwards to a proper position, and the sliding baffle is driven by the connecting rod to move downwards to the lower end of the vertical movement track of the movable swing plate, and the sliding baffle covers the incoming line side contact hole, so that operators can be ensured not to accidentally contact the incoming line side contact hole to avoid accidents.

2. When the circuit breaker body is required to be reconnected to the circuit breaker base after maintenance is completed (namely, the contact of the circuit breaker body is reinserted into the contact hole of the circuit breaker base), the circuit breaker body is pushed forward, when the front upper corner of the circuit breaker body contacts the lower surface of the front lower section of the movable swing plate, the circuit breaker body pushes the movable swing plate to swing upwards until the front lower end of the movable swing plate reaches the upper part of the circuit breaker body, the movable swing plate drives the sliding baffle to slide upwards through the connecting rod in the process, and finally, the sliding baffle does not cover the contact hole on the wire inlet side any more, so that the contact of the circuit breaker body can be inserted into the contact hole of the circuit breaker base.

Drawings

Fig. 1 is a schematic front view of a plug-in circuit breaker in a pulled-out state.

Fig. 2 is a schematic perspective view of a plug-in circuit breaker in a unplugged state.

Fig. 3 is a schematic perspective view illustrating a circuit breaker according to an embodiment of the present utility model in a pulled-out state.

Fig. 4 is a schematic perspective view of the state shown in fig. 3 from another angle.

Fig. 5 is a schematic sectional structure of the state shown in fig. 3.

Fig. 6 is an enlarged partial schematic view of fig. 3.

Fig. 7 is a schematic diagram of the front view of the state shown in fig. 3.

Fig. 8 is a schematic perspective view of the embodiment of fig. 3 in a plugging state of the circuit breaker body.

Fig. 9 is a schematic sectional structure diagram of the state shown in fig. 8.

Detailed Description

The plug-in circuit breaker with the protection device shown in fig. 3, 4, 5, 7 and 6 comprises a circuit breaker body 1 and a circuit breaker base 2, wherein the circuit breaker body 1 is provided with a contact 11, the circuit breaker base 2 is correspondingly provided with a contact hole for inserting the contact, the contact hole is divided into a wire inlet side contact hole 21 and a wire outlet side contact hole 22, the wire inlet side contact hole 21 is positioned at the upper part of the circuit breaker base 2, and the wire outlet side contact hole 22 is positioned at the lower part of the circuit breaker base 2; a fixed base 3 is arranged above the breaker base 2, a sliding baffle 4 is vertically and slidably arranged in the fixed base 3, a movable swinging plate 5, a connecting rod 6 and a spring 7 are also arranged, the rear end of the movable swinging plate 5 is hinged with the fixed base 3 by a first hinge shaft 81, the front end of the movable swinging plate 5 is hinged with the rear lower end of the connecting rod 6 by a second hinge shaft 82, and the front upper end of the connecting rod 6 is hinged with the sliding baffle 4 by a third hinge shaft 83; the spring 7 applies downward pressure to the movable swing plate 5;

when the sliding baffle 4 moves up to the upper end of the vertical movement track thereof, the vertical position of the sliding baffle 4 is staggered from the vertical position of the incoming line side contact hole 21, so that the sliding baffle 4 does not cover the incoming line side contact hole 21, as shown in fig. 9;

when the sliding damper 4 moves down to the lower end of the vertical movement track, the sliding damper 4 shields the incoming line side contact hole 21, the front lower section (section AB in fig. 5) of the movable swing plate 5 is located right behind the upper part of the circuit breaker base 2, the lower surface of the front lower section (section AB in fig. 5) of the movable swing plate is inclined from the rear upper direction to the front lower direction, and the lower surface of the front lower section of the movable swing plate is arc-shaped.

The principles of the above embodiments are used as follows:

1. in the overhaul process, when the breaker body 1 is separated from the breaker base 2, under the pressure action of the spring 7, the movable swinging plate 5 swings downwards to be in place, and the sliding baffle 4 is driven by the connecting rod 6 to move downwards to the lower end of the vertical moving track of the movable swinging plate, and the sliding baffle 4 covers the incoming line side contact hole 21, so that operators can be prevented from accidentally contacting the incoming line side contact hole to avoid accidents, and the situation is shown in fig. 3, 4, 5 and 7.

2. When the circuit breaker body 1 needs to be reconnected to the circuit breaker base 2 after the overhaul is completed (that is, the contact 11 of the circuit breaker body is reinserted into the contact hole 21 and the contact hole 22 of the circuit breaker base), the circuit breaker body 1 is pushed forward, when the upper front corner of the circuit breaker body 1 contacts the lower front section of the movable swinging plate 5, the circuit breaker body 1 pushes the movable swinging plate 5 to swing upwards around the first hinge shaft 81 until the lower front end (point A in fig. 9) of the movable swinging plate 5 comes above the circuit breaker body 2, in the process, the movable swinging plate 5 drives the sliding baffle 4 to slide upwards through the connecting rod 6, finally, the sliding baffle 4 does not cover the wire inlet side contact hole 21 any more, and then the contact of the circuit breaker body can be inserted into the contact hole of the circuit breaker base, as shown in fig. 8 and 9.

Claims (2)

1. The plug-in circuit breaker with the protection device comprises a circuit breaker body and a circuit breaker base, wherein the circuit breaker body is provided with contacts, the circuit breaker base is correspondingly provided with contact holes for inserting the contacts, the contact holes are divided into wire inlet side contact holes and wire outlet side contact holes, the wire inlet side contact holes are positioned at the upper part of the circuit breaker base, and the wire outlet side contact holes are positioned at the lower part of the circuit breaker base; the method is characterized in that: a fixed base is further arranged above the circuit breaker base, a sliding baffle plate is vertically and slidably arranged in the fixed base, a movable swinging plate, a connecting rod and a spring are further arranged, the rear end of the movable swinging plate is hinged with the fixed base through a first hinge shaft, the front end of the movable swinging plate is hinged with the rear lower end of the connecting rod through a second hinge shaft, and the front upper end of the connecting rod is hinged with the sliding baffle plate through a third hinge shaft; the spring applies downward pressure to the movable swing plate;

when the sliding baffle moves upwards to the upper end of the vertical movement track, the vertical position of the sliding baffle is staggered from the vertical position of the contact hole at the inlet wire side; when the sliding baffle moves downwards to the lower end of the vertical movement track, the sliding baffle covers the incoming line side contact hole, the front lower section of the movable swinging plate is positioned right behind the upper part of the circuit breaker base, and the front lower section of the movable swinging plate is inclined from the rear upper part to the front lower part.

2. A pluggable circuit breaker with protection device according to claim 1, characterized in that: the lower surface of the front lower section of the movable swing plate is arc-shaped.