CN219435794U - Circuit breaker contact system - Google Patents

Abstract

The utility model discloses a circuit breaker contact system, which comprises a bottom plate component, a fixed contact component and a radiating fin, wherein the bottom plate component is arranged on a base of a circuit breaker, the fixed contact component is arranged in the bottom plate component to directly connect fixed contacts of adjacent phases, and the radiating fin is arranged on the outer end face of the fixed contact component.

Description

Circuit breaker contact system

Technical Field

The utility model relates to the technical field of low-voltage electrical apparatus components and parts equipment, in particular to a contact system of a universal circuit breaker.

Background

As the power of infrastructure construction such as new energy power generation increases, the application scenarios of the direct current switch are also increasing. For low-voltage electric appliance production enterprises, because of the large investment, long period and slow effect of developing brand new direct current switches, most enterprises adopt improvement according to the wiring characteristics of direct current on the basis of the original alternating current switches, adopt a plurality of fracture series connection to obtain higher rated voltage so as to meet the requirements of a direct current system, change the die opening into die repairing, add small pieces and greatly reduce the cost time.

When the four-pole fixed switch is adopted to be changed into a direct current switch, the number of short-circuit points in the direct current switch is large, the weight of the direct current switch is increased at a high temperature, and the production cost is increased due to the increase of copper. The conventional straight-out horizontal wiring terminals mostly adopt a structure of straight-out type shorting outside the switch, for example, a novel fixed circuit breaker disclosed in patent document with publication number of CN214588493U comprises a fixed contact bottom plate assembly and a base assembly; the fixed contact bottom plate assembly comprises a bottom plate and a fixed contact assembly I fixed on the bottom plate; the first fixed contact assembly is provided with a first fixed contact outgoing line row, the first fixed contact outgoing line row is provided with at least two groups of arc striking sheets, a gap is arranged between two adjacent groups of arc striking sheets, and a sealing plate is fixed in the gap to insulate the cavity; the base assembly component comprises a base and a moving contact assembly component I, the moving contact assembly component I is provided with a moving contact welding component I, the moving contact welding component I is provided with a moving contact outgoing line row I, the moving contact outgoing line row I is provided with at least two groups of contact sheet components and a mutual inductor, a gap is arranged between every two adjacent groups of contact sheet components, and a sealing block is fixed in the gap to insulate the cavity. The scheme reduces the contact resistance after phase combination, reduces the temperature rise, simplifies the structure and reduces the cost. However, in the actual operation process, the prior art and the above patent have great disadvantages: when the direct current switch is changed into a power distribution cabinet with limited internal space, the occupied space is large, the weight is large, the copper consumption is large, the heating points are large, and the economic benefit is not outstanding.

Disclosure of Invention

Aiming at the problems of large occupied space, large copper consumption and large weight of the straight-out horizontal wiring terminal structure and a large number of heating points in the prior art, the utility model provides a circuit breaker contact system, and solves the problems.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a circuit breaker contact system, includes bottom plate subassembly, static contact subassembly, fin, its characterized in that: the base plate assembly is arranged on a base of the circuit breaker, the fixed contact assemblies are arranged in the base plate assembly to enable fixed contacts of adjacent phases to be directly connected, and the radiating fins are arranged on the outer side end faces of the fixed contact assemblies.

Preferably, the bottom plate assembly comprises a bottom plate and a cushion block, wherein arc-extinguishing chamber isolation ribs for isolating two adjacent arc-extinguishing chambers are arranged on the bottom plate, gaps for installing the cushion block are formed in the isolation ribs, and a gap channel and a fixed contact assembly mounting hole are formed in the upper portion of the bottom plate.

Preferably, the heat sink extends out of the base plate assembly through the notched passage.

Preferably, grooves are formed in the upper end and the lower end of the cushion block, the cushion block is inserted into a notch of the isolation rib for installing the cushion block through the grooves, and grooves parallel to the arc extinguishing chamber isolation rib are formed in the bottom of the cushion block.

Preferably, a first cushion block fixing hole is formed in the groove of the cushion block.

Preferably, the static contact assembly comprises a static contact block and more than two static contacts, an arc baffle and an arc striking sheet, wherein the static contact block is fixed on the bottom plate through a static contact assembly mounting hole, each group of arc striking sheets and static contacts are also fixed on the bottom plate through the same static contact assembly mounting hole, and the arc baffle of each group is mounted below the static contacts of the corresponding group.

Preferably, the fixed contact block is provided with a matching rib corresponding to the groove at the bottom of the cushion block in the middle of the combination of two adjacent groups of fixed contacts, the arc-stop plate and the arc-striking plate, the matching rib is also provided with a cushion block fixing hole II corresponding to the cushion block fixing hole I in the groove of the cushion block, and the matching rib is fixed on the fixed contact block through a screw. The matching ribs on the static contact block are matched with the grooves on the back of the cushion block, so that the air tightness can be obviously improved.

Preferably, the main body of the radiating fin is rectangular, the notch channel is rectangular, the size of the rectangle is larger than the outline size of the radiating fin, and the radiating fin can conveniently extend out of the notch channel of the bottom plate to the external environment.

Preferably, the cushion block is made of insulating materials, so that adjacent arc-extinguishing chambers can be isolated, and adjacent arc breakdown is avoided.

Preferably, the insulating material of the pad is an SMC molding material or a DMC molding material.

According to the circuit breaker contact system, the traditional static contact structure is changed into the static contact part to be directly connected inside the switch, so that copper consumption and heating points are reduced, the problem that the traditional static contact occupies space outside the switch is solved, and meanwhile, heat inside the circuit breaker can be better dissipated through the radiating fin, so that economic benefit is more remarkable.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

fig. 2 is a schematic rear perspective view of a circuit breaker employing the present utility model;

FIG. 3 is a front perspective view of the stationary contact assembly;

FIG. 4 is a perspective view of the back of the stationary contact assembly with a heat sink mounted across the bottom plate (hidden);

FIG. 5 is a perspective view of the interior of the base plate;

FIG. 6 is a perspective view of the spacer from the perspective of the stationary contact block;

the device comprises a 1-base, a 2-base plate assembly, a 21-base plate, 211-gap channels, 212-isolation ribs, 22-cushion blocks, 221-grooves, 222-cushion block fixing holes I, 3-radiating fins, 4-fixed contact assemblies, 41-fixed contact blocks, 411-matching ribs, 412-cushion block fixing holes II, 42-fixed contacts, 43-arc baffles and 44-arc striking pieces.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

The embodiment provides a technical scheme that: a four-pole fixed universal alternating current breaker switch is changed into a direct current switch's a breaker contact system, includes a bottom plate subassembly 2, two fixed contact subassemblies 4, two fin 3, the bottom plate subassembly 2 is installed on the base 1 in the middle of the circuit breaker through four screws in four corners, still installs the circuit breaker face guard in the front of the base 1, fixed contact subassemblies 4 are installed in the bottom plate subassembly 2 and make adjacent looks fixed contact directly link to each other to reach the purpose of changing into direct current switch, fin 3 is installed on fixed contact subassemblies 4 outside terminal surface.

The base plate assembly 2 comprises a base plate 21 and two cushion blocks 22, wherein three longitudinal arc-extinguishing chamber isolation ribs 212 are arranged on the base plate 21 and used for isolating two adjacent arc-extinguishing chambers, notches for installing the cushion blocks 22 are formed in the upper parts of the first isolation ribs 212 and the third isolation ribs 212 on the two sides, two notch channels 211 are formed in the arc-extinguishing chamber isolation ribs 212 which are not notched in the middle of the horizontal positions of the notches, and six static contact assembly mounting holes are formed in the upper part of each notch channel 211 and used for installing the static contact assembly 4. The main body of the radiating fin 3 is rectangular, the notch channel 211 is rectangular, the size of the rectangle is larger than the external size of the radiating fin 3, and the radiating fin 3 extends out of the bottom plate assembly 2 through the notch channel 211, so that the purpose of radiating internal heat outwards is achieved. The upper end and the lower end of the cushion block 22 are provided with grooves, the cushion block 22 is inserted into a notch of the isolation rib 212 for installing the cushion block 22 through the grooves, the rear part of the cushion block 22 is also provided with grooves parallel to the arc extinguishing chamber isolation rib 212, and the grooves at the rear part of the cushion block 22 are also provided with a cushion block fixing hole I222. The cushion block 22 is made of an insulating material, and in view of fire protection level, an SMC molding material is used in this embodiment, but of course, a DMC molding material may also be used, so that the fire protection level is weaker and the economy is better.

Each static contact assembly 4 comprises a static contact block 41 and two static contacts 42, an arc-shaped baffle 43 and an arc striking sheet 44, wherein the static contact block 41 is externally fixed on the bottom plate 21 through four static contact assembly mounting holes above a notch channel 211 on the bottom plate by using screws, two groups of arc striking sheets 44 and static contacts 42 are also fixed on the bottom plate 21 through two static contact assembly mounting holes above the four static contact assembly mounting holes, the screws sequentially penetrate through the bottom plate 21, the static contacts 42 and the arc striking sheets 44 from the outer side of the bottom plate assembly 2 and are fixed through the same static contact assembly mounting hole on the bottom plate 21, and the arc-shaped baffle 43 of each group is arranged below the static contact assembly mounting hole of the corresponding group. The fixed contact block 41 is provided with a matching rib 411 corresponding to a groove at the bottom of the cushion block 22 in the middle of the combination of two adjacent groups of fixed contacts 42, the arc-stop plates 43 and the arc striking plates 44, the matching rib 411 is also provided with a cushion block fixing hole II 412 corresponding to a cushion block fixing hole II 222 in the groove of the cushion block 22, and the matching rib 411 is fixed on the inner surface of the fixed contact block 41 from the outside of the fixed contact block 41 through a screw.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (10)

1. The utility model provides a circuit breaker contact system, includes bottom plate subassembly, static contact subassembly, fin, its characterized in that: the base plate assembly is arranged on a base of the circuit breaker, the fixed contact assemblies are arranged in the base plate assembly to enable fixed contacts of adjacent phases to be directly connected, and the radiating fins are arranged on the outer side end faces of the fixed contact assemblies.

2. A circuit breaker contact system according to claim 1, wherein: the base plate assembly comprises a base plate and cushion blocks, arc-extinguishing chamber isolation ribs for isolating two adjacent arc-extinguishing chambers are arranged on the base plate, gaps for installing the cushion blocks are formed in the isolation ribs, and gap channels and static contact assembly mounting holes are formed in the upper portion of the base plate.

3. A circuit breaker contact system according to claim 2, wherein: the radiating fins extend out of the bottom plate assembly through the notch channels.

4. A circuit breaker contact system according to claim 2, wherein: the upper end and the lower end of the cushion block are provided with grooves, the cushion block is inserted into a notch of the isolation rib for installing the cushion block through the grooves, and the rear part of the cushion block is also provided with grooves parallel to the arc extinguishing chamber isolation rib.

5. A circuit breaker contact system as recited in claim 4 wherein: and a first cushion block fixing hole is formed in the groove at the rear part of the cushion block.

6. A circuit breaker contact system as recited in claim 4 wherein: the static contact assembly comprises a static contact block and more than two static contacts, arc baffles and arc striking pieces, wherein the static contact block is fixed on a bottom plate through a static contact assembly mounting hole, each group of arc striking pieces and static contacts are also fixed on the bottom plate through the same static contact assembly mounting hole, and the arc baffles of each group are arranged below the static contacts of the corresponding group.

7. A circuit breaker contact system as recited in claim 6 wherein: the static contact block is provided with a matching rib corresponding to a groove at the bottom of the cushion block in the middle of the combination of two adjacent groups of static contacts, the arc-stop plate and the arc striking plate, the matching rib is also provided with a cushion block fixing hole II corresponding to a cushion block fixing hole I in the groove of the cushion block, and the matching rib is fixed on the static contact block through a screw.

8. A circuit breaker contact system according to claim 2, wherein: the main body of the radiating fin is cuboid, and the notch channel is rectangular and the size of the rectangle is larger than the outline size of the radiating fin.

9. A circuit breaker contact system according to claim 2, wherein: the cushion block is made of insulating materials.

10. A circuit breaker contact system according to claim 8, wherein: the insulating material of the cushion block uses SMC molding material or DMC molding material.