CN210722869U

CN210722869U - Novel vacuum circuit breaker

Info

Publication number: CN210722869U
Application number: CN201921659436.6U
Authority: CN
Inventors: 郑延智
Original assignee: Sun Xinyilong
Current assignee: Sun Xinyilong
Priority date: 2019-10-01
Filing date: 2019-10-01
Publication date: 2020-06-09
Anticipated expiration: 2029-10-01

Abstract

The utility model discloses a novel vacuum circuit breaker, the power distribution box comprises a box body, separate into vacuum interrupter and control room through the baffle in the box, be provided with static contact and moving contact relatively in the vacuum interrupter, install the fly leaf through guiding mechanism in the control room, be provided with the conducting rod on the lower terminal surface of moving contact, the lower extreme of conducting rod runs through the baffle and connects on the up end of fly leaf, evenly be connected with a plurality of first springs between the up end of fly leaf and the lower terminal surface of baffle. The utility model discloses a stop gear can carry on spacingly to the moving contact after closing a floodgate, and then has prevented that the moving contact from breaking away from because factors such as external vibrations and static contact, has improved the security that this device used, and can play the cushioning effect to being connected of moving contact and static contact when closing a floodgate to avoid the striking wearing and tearing between moving contact and static contact, and then improved the life of moving contact and static contact.

Description

Novel vacuum circuit breaker

Technical Field

The utility model relates to the technical field of electrical equipment, especially, relate to a novel vacuum circuit breaker.

Background

The vacuum circuit breaker has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinction, and is relatively popularized in power distribution networks. The working principle of the vacuum circuit breaker is that when the moving contact and the static contact are separated under the action of the operating mechanism, electric arcs are generated between the contacts, steam volatilizes from the surfaces of the contacts at high temperature, because the contacts are designed into special shapes, a magnetic field is generated when current passes through, the electric arcs rapidly move along the tangential direction of the surfaces of the contacts under the action of the magnetic field, partial metal steam is condensed on a metal cylinder (shielding cover), the electric arcs are extinguished when the electric arcs naturally pass through zero, and the medium strength between the contacts is rapidly recovered.

At present, after the existing vacuum circuit breaker is switched on, the moving contact and the static contact are in mutual contact, but the contact state is not locked, the danger of unnecessary tripping is easily caused, the normal use of the vacuum circuit breaker is influenced, and in the process of mutual action of the moving contact and the static contact, the moving contact can violently impact the static contact, under the action of long impact, the mutual abrasion between the moving contact and the static contact is easily caused, the contact area between the moving contact and the static contact is reduced, the arc extinguishing effect cannot be achieved, the service life of the moving contact and the static contact is also influenced, and therefore a novel vacuum circuit breaker is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the moving contact that exists among the prior art and being connected inseparable when closing a floodgate with the static contact, and the serious shortcoming of mutual wearing and tearing when using, and the novel vacuum circuit breaker who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel vacuum circuit breaker, the power distribution box comprises a box body, separate into vacuum interrupter and control room through the baffle in the box, be provided with static contact and moving contact relatively in the vacuum interrupter, install the fly leaf through guiding mechanism in the control room, be provided with the conducting rod on the lower terminal surface of moving contact, the lower extreme of conducting rod runs through the baffle and connects on the up end of fly leaf, evenly be connected with a plurality of first springs between the up end of fly leaf and the lower terminal surface of baffle, install insulating pull rod through the bearing rotation on the lower terminal surface of fly leaf, fixed cover is equipped with the limiting plate on the insulating pull rod, the symmetry is provided with two and limiting plate complex stop gear in the control room.

Preferably, the guide mechanism comprises two fixed blocks symmetrically arranged on the inner wall of the box body, a polish rod is arranged between each fixed block and the partition plate, and the movable plate is connected to the two polish rods in a sliding manner.

Preferably, a sealing sleeve is installed between the conductive rod and the partition plate.

Preferably, stop gear includes and rotates the commentaries on classics board of installing on the box inner wall through the round pin axle, rotate on the lower terminal surface of commentaries on classics board and install the bracing piece, the bracing piece is kept away from the one end of changeing the board and is passed through slide mechanism and install on the inner wall of box, be provided with the second spring on the box inner wall, the lower extreme and the commentaries on classics board up end fixed connection of second spring.

Preferably, slide mechanism includes that the bracing piece is kept away from the slider of rotating the connection on the one end of changeing the board, be provided with the sliding seat on the box inner wall, and slider slidable mounting is on the sliding seat.

Preferably, the distance between the two rotating plates is smaller than the length of the limit plate.

The utility model has the advantages that:

1. through setting up fly leaf, insulating pull rod and first spring, when closing a floodgate and making moving contact and static contact, first spring can cushion, has prevented the striking wearing and tearing between moving contact and static contact to the life of moving contact and static contact has been improved.

2. Through setting up limiting plate, commentaries on classics board and first spring, after the action of closing a floodgate, through the elastic force effect of first spring to can play limiting displacement to the moving contact, and then can prevent that the moving contact from breaking away from because factors such as external vibrations and static contact, having improved the security that this device used.

To sum up, the utility model discloses a stop gear can carry on spacingly to the moving contact after closing a floodgate, and then has prevented that the moving contact from breaking away from because factors such as external vibrations and static contact, has improved the security that this device used, and can play the cushioning effect to being connected of moving contact and static contact when closing a floodgate to avoid the striking wearing and tearing between moving contact and static contact, and then improved the life of moving contact and static contact.

Drawings

Fig. 1 is a schematic structural diagram of a novel vacuum circuit breaker according to the present invention;

fig. 2 is the utility model provides a position structure schematic diagram of limiting plate and commentaries on classics board among novel vacuum circuit breaker.

In the figure: the device comprises a box body 1, a vacuum arc-extinguishing chamber 2, a control chamber 3, a fixed block 4, a polished rod 5, a movable plate 6, a first spring 7, a static contact 8, a movable contact 9, an insulating pull rod 10, a limiting plate 11, a rotating plate 12, a second spring 13, a supporting rod 14 and a sliding seat 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a novel vacuum circuit breaker comprises a box body 1, the box body 1 is partitioned into a vacuum arc extinguish chamber 2 and a control chamber 3 by a partition board, a static contact 8 and a moving contact 9 are oppositely arranged in the vacuum arc extinguish chamber 2, the static contact 8 is arranged on the top wall of the box body 1, the moving contact 9 is arranged on the upper end surface of the partition board by a conductive rod, a moving plate 6 is arranged in the control chamber 3 by a guide mechanism, the lower end of the conductive rod penetrates through the partition board and is connected on the upper end surface of the moving plate 6, a sealing sleeve is arranged between the conductive rod and the partition board and can ensure the sealing performance of the vacuum arc extinguish chamber 2, a plurality of first springs 7 are uniformly connected between the upper end surface of the moving plate 6 and the lower end surface of the partition board, an insulating pull rod 10 is rotatably arranged on the lower end surface of, the insulating pull rod 10 is fixedly sleeved with a limiting plate 11, and two limiting mechanisms matched with the limiting plate 11 are symmetrically arranged in the control chamber 3.

In the utility model, the guide mechanism comprises two fixed blocks 4 symmetrically arranged on the inner wall of the box body 1, a polish rod 5 is arranged between each fixed block 4 and the baffle plate, the movable plate 6 is connected on the two polish rods 5 in a sliding way, and the guide mechanism can ensure that the movable plate 6 can move along the vertical direction, thereby preventing the conductive rod from shifting;

stop gear includes and rotates the commentaries on classics board 12 of installing on 1 inner wall of box through the round pin axle, it installs bracing piece 14 to rotate on the lower terminal surface of commentaries on classics board 12, bracing piece 14 is kept away from the one end of changeing board 12 and is passed through slide mechanism and install on the inner wall of box 1, slide mechanism includes that bracing piece 14 keeps away from the slider of rotating the connection on the one end of changeing board 12, be provided with sliding seat 15 on the 1 inner wall of box, and slider slidable mounting is on sliding seat 15, when sliding to sliding seat 15's the bottom, change board 12 and be in horizontal position, be provided with second spring 13 on the 1 inner wall of box, the lower extreme and the commentaries on classics board 12 up end fixed connection of second spring 13, distance between two commenta.

When the utility model is used, when a switch needs to be switched on, an operator can push the insulating pull rod 10 upwards, the insulating pull rod 10 drives the movable plate 6 to move upwards, the movable plate 6 drives the movable contact 9 to move upwards through the conductive rod until the movable contact abuts against the static contact 8, the insulating pull rod 10 is continuously pushed upwards to enable the movable plate 6 to extrude the first spring 7, then, two ends of the limiting plate 11 abut against the rotating plate 12 and drive the rotating plate 12 to rotate until the rotating plate 12 is separated from the limiting plate 11, the rotating plate 12 is reset to be in a horizontal state under the elastic force of the second spring 13 after being separated from the limiting plate 11, at the moment, the insulating pull rod 10 is sent away, the insulating pull rod 10 moves downwards under the elastic force of the first spring 7 to enable the lower ends of two sides of the limiting plate 11 to abut against the two rotating plates 12, at the moment, the first spring 7 is still in a compressed state, so that the movable contact 9 can be limited, and further the movable contact 9, when the moving contact 9 moves upwards to be in contact with the static contact 8, the first spring 7 can buffer, so that impact abrasion between the moving contact 9 and the static contact 8 is prevented;

when the brake is required to be switched off, the insulating pull rod 10 is rotated by ninety degrees, the limiting plate 11 is separated from the two rotating plates 12, then the insulating pull rod 10 is loosened, the movable plate 6 moves downwards under the action of the elastic force of the first spring 7, and the movable contact 9 is separated from the fixed contact 8.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A novel vacuum circuit breaker comprises a box body (1) and is characterized in that the interior of the box body (1) is divided into a vacuum arc-extinguishing chamber (2) and a control chamber (3) by a partition plate, a static contact (8) and a moving contact (9) are arranged in the vacuum arc-extinguishing chamber (2) relatively, a movable plate (6) is arranged in the control chamber (3) through a guide mechanism, a conducting rod is arranged on the lower end surface of the movable contact (9), the lower end of the conducting rod penetrates through the partition plate and is connected to the upper end surface of the movable plate (6), a plurality of first springs (7) are uniformly connected between the upper end surface of the movable plate (6) and the lower end surface of the partition plate, an insulating pull rod (10) is rotatably arranged on the lower end surface of the movable plate (6) through a bearing, the insulation pull rod (10) is fixedly sleeved with a limiting plate (11), and two limiting mechanisms matched with the limiting plate (11) are symmetrically arranged in the control chamber (3).

2. The vacuum circuit breaker as claimed in claim 1, wherein the guiding mechanism comprises two fixed blocks (4) symmetrically arranged on the inner wall of the box body (1), a polish rod (5) is installed between each fixed block (4) and the partition plate, and the movable plate (6) is slidably connected to the two polish rods (5).

3. The novel vacuum circuit breaker according to claim 1, characterized in that a sealing sleeve is installed between the conductive rod and the partition plate.

4. The novel vacuum circuit breaker according to claim 1, wherein the limiting mechanism comprises a rotating plate (12) rotatably mounted on the inner wall of the box body (1) through a pin, a support rod (14) is rotatably mounted on the lower end face of the rotating plate (12), one end of the support rod (14) far away from the rotating plate (12) is mounted on the inner wall of the box body (1) through a sliding mechanism, a second spring (13) is arranged on the inner wall of the box body (1), and the lower end of the second spring (13) is fixedly connected with the upper end face of the rotating plate (12).

5. The vacuum circuit breaker as claimed in claim 4, wherein the sliding mechanism comprises a slider rotatably connected to an end of the support rod (14) far from the rotating plate (12), a sliding seat (15) is provided on an inner wall of the case (1), and the slider is slidably mounted on the sliding seat (15).

6. The vacuum circuit breaker according to claim 4, characterized in that the distance between the two rotating plates (12) is smaller than the length of the limiting plate (11).