Double-breakpoint frame circuit breaker

Abstract

The utility model discloses a double-breakpoint frame circuit breaker, which relates to the technical field of wind power and energy storage and comprises a main body, the main body is at least provided with a cavity shell, a moving contact module and two groups of static contact modules in contact with the moving contact module are arranged in the cavity shell, a moving contact support horizontally reciprocates in the cavity shell, and the static contact modules are in contact with the moving contact module. A bridge-shaped contact and a movable arc striking contact are arranged in the movable contact support, the static contact module comprises a static contact and a static arc striking contact, the static arc striking contact is arranged on one side of the static contact, the bridge-shaped contact and the two groups of corresponding static contacts form a double-breakpoint structure, the static arc striking contact is rotatably connected with the static contact through a pin shaft, and the static arc striking contact is connected with the static contact through a pin shaft. The static arc striking contact is arranged in the bridge-shaped contact and is reset by means of the moving contact reset spring, the design enables the static arc striking contact to automatically return to the original position under the action of the moving contact module, the bridge-shaped contact and the two groups of corresponding static contacts form a double-breakpoint structure, and the breaking capacity and the arc striking effect are improved through the double-breakpoint mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind power and energy storage technology, concretely to a double-breakpoint frame circuit breaker. BACKGROUND

[0002] In the field of low-voltage power supply and distribution, the development of high-capacity DC systems in urban subways, photovoltaic power generation, ship power and other fields is very rapid, and the voltage level of the power supply system is also greatly improved to DC 1500V or even DC 2000V. Correspondingly, high-performance breaking capacity DC frame circuit breaker products and derived DC disconnector products have emerged as the times require. Currently, DC frame circuit breakers basically adopt the reverse arc method, that is, when the arc voltage is higher than the system voltage, the arc current will be forced to decrease and gradually drop to zero. In actual engineering, the arc voltage is generally increased by lengthening, cooling and cutting the arc in the metal grid arc chamber. The higher the system voltage, the more difficult it is to break the circuit breaker. It is of great significance to ensure that the size of the circuit breaker does not change or even becomes smaller to achieve high-performance breaking under high DC voltage conditions. Although the existing DC frame circuit breaker can meet the demand of the power system to a certain extent, it is usually used in DC circuits in multiple series connection mode. SUMMARY

[0003] The utility model aims at providing a double-breakpoint frame circuit breaker to solve the problems raised in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a double-breakpoint frame circuit breaker, comprising a main body, the main body is provided with at least one cavity shell, the cavity shell is provided with a moving contact module and two groups of static contact modules in contact with the moving contact module, wherein the moving contact module comprises a moving contact support, a bridge-shaped contact and a moving arc contact, the moving contact support moves horizontally in the cavity shell, the moving contact support is provided with a bridge-shaped contact and a moving arc contact, the bridge-shaped contact is symmetrically arranged on both sides of the moving arc contact, the static contact module comprises a static contact and a static arc contact, wherein the static arc contact is arranged on one side of the static contact, the bridge-shaped contact and the corresponding two groups of static contacts form a double-breakpoint structure, and arc chambers are symmetrically arranged at the upper and lower ends of the moving contact module.

[0005] Further, the moving contact support is provided with a pin shaft connection, the bridge-shaped contact and the moving arc contact are provided with corresponding grooves, the pin shaft is arranged in the grooves, the moving contact support is bolted with an insulating plate in the direction of the static contact module, the other side of the moving contact support is hinged with a pull rod for driving the horizontal reciprocating movement of the moving contact support, and the moving contact support is further provided with a bearing and a moving contact return spring.

[0006] Further, the chamber shell is assembled by two side plates, the inside of the side plates is provided with a movable area corresponding to the movable contact module, a runway type sliding groove is opened in the movable area, the bearing of the movable contact module is arranged in the runway type sliding groove, and a plurality of connecting holes are arranged on one side of the chamber shell.

[0007] Further, an insulation module is further arranged in the chamber shell, the insulation module comprises a lifting plate and a movable block, the movable block is abutted to the chamber shell through a movable reset spring, slide ladder type track ribs are arranged on the two sides of the movable block, the lifting plate is opened with a slot, the track ribs of the movable block are abutted through the slot, the movable block compresses the movable reset spring to drive the lifting plate to move up and down, and the lifting plate moves in front of the stationary contact module.

[0008] Further, the arc extinguishing chamber further comprises a plurality of arc extinguishing grid pieces, the two sides of the arc extinguishing grid piece are respectively provided with a movable arc striking piece and a stationary arc striking piece, the stationary arc striking piece is fixedly assembled on the stationary contact, and the movable arc striking piece is arranged on the back of the movable contact module.

[0009] Compared with the prior art, the beneficial effects of the utility model are that the stationary arc striking contact is rotatably connected with the stationary contact through a pin shaft and is reset by means of the movable contact reset spring, the design makes the stationary arc striking contact automatically restore to the original position after being affected by the movable contact module, the bridge-shaped contact and the corresponding two groups of stationary contacts form a double-breakpoint structure, and the double-breakpoint mode improves the breaking capacity and the arc striking effect.

[0010] The double-breakpoint mode is realized by the bridge-shaped contact cooperating with the two groups of stationary contacts, the volume is effectively reduced while the opening distance of the direct current frame circuit breaker and the number of arc extinguishing grid pieces are effectively increased. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a whole structure schematic view of the utility model embodiment;

[0012] Figure 2 It is an internal structure schematic view of the utility model embodiment;

[0013] Figure 3 It is a chamber shell structure schematic view of the utility model embodiment;

[0014] Figure 4 It is a movable contact module structure schematic view of the utility model embodiment;

[0015] Figure 5 It is an insulation module structure schematic view of the utility model embodiment;

[0016] Figure 6 It is an arc extinguishing chamber structure schematic view of the utility model embodiment.

[0017] In the drawing:

[0018] 100, main body;

[0019] 10, chamber shell; 101, movable area; 1011, sliding groove; 102, connecting hole;

[0020] 20, arc extinguishing chamber; 201, arc extinguishing grid; 202, moving arc starting piece; 203, static arc starting piece;

[0021] 30, moving contact module; 301, bearing; 302, moving contact reset spring; 303, pull rod; 304, bridge type contact; 305, moving arc starting contact; 306, insulating plate; 307, moving contact support;

[0022] 40, insulation module; 401, lifting plate; 402, movable block; 403, movable reset spring;

[0023] 50, static contact module; 501, static contact; 5011, static arc starting contact. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-6 A double-break point frame circuit breaker comprises a main body 100, which is provided with at least a chamber shell 10, a moving contact module 30 and two groups of static contact 501 modules 50 in contact with the moving contact module 30 are arranged in the chamber shell 10, wherein the moving contact module 30 comprises a moving contact support 307, a bridge type contact 304 and a moving arc starting contact 305, the moving contact support 307 moves horizontally reciprocatingly in the chamber shell 10, the bridge type contact and the moving arc starting contact 305 are arranged in the moving contact support 307, the bridge type contact is symmetrically arranged on both sides of the moving arc starting contact 305, the static contact 501 module 50 comprises a static contact 501 and a static arc starting contact 5011, wherein the static arc starting contact 5011 is arranged on one side of the static contact 501, the bridge type contact and the corresponding two groups of static contacts 501 form a double-break point structure, the moving contact module 30 is symmetrically provided with arc extinguishing chambers 20 at the upper and lower ends, the chamber shell 10 structure realizes modularization, can be assembled according to requirements, and is beneficial to the realization of multi-pole assembly. It can be assembled into two-pole, three-pole, four-pole and multi-pole, in each chamber shell 10, the moving contact module 30 and the static contact 501 module 50 work cooperatively to realize the connection and disconnection of the circuit.

[0026] In the embodiment, the movable contact support 307 is connected by a pin shaft, the bridge-type contact 304 and the movable arc-starting contact 305 are provided with corresponding grooves, the pin shaft is arranged in the grooves, the movable contact support 307 is bolted with an insulating plate 306 towards the static contact 501 module 50, the movable contact support 307 is hingedly connected with a pull rod 303 for driving the movable contact support 307 to horizontally reciprocate, the movable contact support 307 is further provided with a bearing 301 and a movable contact reset spring 302, the movable contact support 307 is assembled by the pin shaft, the bridge-type contact 304 and the movable arc-starting contact 305 are rotated by the pin shaft, the pull rod 303 is pulled to drive the movable contact support 307 to horizontally move, so that the movable contact module 30 and the static contact 501 module 50 are contacted.

[0027] In the embodiment, the chamber shell 10 is assembled by two side plates, the side plates are provided with a movable area 101 corresponding to the movable contact module 30, the movable area 101 is provided with a track-type sliding groove 1011, the bearing 301 of the movable contact module 30 is arranged in the track-type sliding groove 1011, one side of the chamber shell 10 is provided with a plurality of connecting holes 102, the bearing 301 is embedded in the track-type sliding groove 1011, so that the movable contact support 307 is horizontally slid in the sliding groove 1011 through the bearing 301, the chamber shell 10 is assembled by inserting connecting rods in the connecting holes 102 to realize multi-stage assembly.

[0028] In the embodiment, the chamber shell 10 is further provided with an insulating module 40, the insulating module 40 includes a lifting plate 401 and a movable block 402, the movable block 402 is abutted to the chamber shell 10 through a movable reset spring 403, the movable block 402 is provided with a slide-type track rib extended on both sides, the lifting plate 401 is provided with an empty slot, the empty slot is abutted to the track rib of the movable block 402, the movable block 402 compresses the movable reset spring 403 to drive the lifting plate 401 to move up and down, the lifting plate 401 is movable in front of the static contact 501 module 50, in the initial state, the lifting plate 401 in the insulating module 40 is in front of the static contact 501 module 50, so as to have an insulating effect, when the movable contact module 30 moves to the right, the insulating plate 306 on the movable contact module 30 is pressed to the movable block 402 of the insulating module 40, so as to drive the lifting plate 401 to move downwards, thereby exposing the static contact 501 module 50 to make it contacted with the movable contact module 30.

[0029] In the embodiment, the arc extinguishing chamber 20 further comprises a plurality of arc extinguishing vanes 201, and the arc extinguishing vanes 201 are respectively provided with a dynamic arc drawing vane 202 and a static arc drawing vane 203, wherein the static arc drawing vane 203 is fixedly assembled on the static contact 501, and the dynamic arc drawing vane 202 is arranged on the back of the dynamic contact module 30. The arc generated in the arc extinguishing chamber 20 is directly adsorbed by the dynamic arc drawing vane 202 and the static arc drawing vane 203, so that the arc is extinguished.

[0030] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.

Claims

1. A double-break frame circuit breaker, characterized in that: a main body is provided with a chamber shell, a moving contact module and two sets of static contact modules in contact with the moving contact module, wherein the moving contact module comprises a moving contact support, a bridge-shaped contact and a moving arc starting contact, the moving contact support moves horizontally in the chamber shell, the moving contact support is provided with the bridge-shaped contact and the moving arc starting contact, the bridge-shaped contact is symmetrically arranged on both sides of the moving arc starting contact, the static contact module comprises a static contact and a static arc starting contact, the static arc starting contact is arranged on one side of the static contact, the bridge-shaped contact and the corresponding two sets of static contacts form a double-break structure, and arc extinguishing chambers are symmetrically arranged at the upper and lower ends of the moving contact module.

2. The dual-break frame circuit breaker of claim 1, wherein: The moving contact support is provided with a pin shaft, the bridge-shaped contact and the moving arc starting contact are provided with corresponding grooves, the pin shaft is arranged in the grooves, the moving contact support is bolted with an insulating plate in the direction of the static contact module, the other side of the moving contact support is hinged with a pull rod for driving the moving contact support to move horizontally, and the moving contact support is further provided with a bearing and a moving contact return spring.

3. The dual-break frame circuit breaker of claim 1, wherein: The chamber shell is assembled by two side plates, the inside of the side plates is provided with a movable area corresponding to the moving contact module, a runway-type sliding groove is opened in the movable area, the bearing of the moving contact module is arranged in the runway-type sliding groove, and a plurality of connecting holes are arranged on one side of the chamber shell.

4. The dual-break frame circuit breaker of claim 3, wherein: An insulating module is further arranged in the chamber shell, the insulating module comprises a lifting plate and a movable block, the movable block is abutted to the chamber shell through a movable return spring, slide ladder-type track ribs are arranged on both sides of the movable block, the lifting plate is provided with an empty slot, the empty slot is abutted to the track ribs of the movable block, the movable block compresses the movable return spring to drive the lifting plate to move up and down, and the lifting plate moves in front of the static contact module.

5. The dual-break frame circuit breaker of claim 1, wherein: The arc extinguishing chamber further comprises a plurality of arc extinguishing grid plates, the arc extinguishing grid plates are respectively provided with a moving arc starting plate and a static arc starting plate, the static arc starting plate is fixedly arranged on the static contact, and the moving arc starting plate is arranged on the back of the moving contact module.

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