CN216250608U

CN216250608U - Circuit breaker of environment-friendly cabinet

Info

Publication number: CN216250608U
Application number: CN202122830812.7U
Authority: CN
Inventors: 张万平; 何光洪; 张奥林; 何华奎; 向前
Original assignee: Zhejiang Ronghe Electric Co ltd
Current assignee: Zhejiang Ronghe Electric Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-04-08
Anticipated expiration: 2031-11-18

Abstract

The utility model discloses an environment-friendly cabinet breaker, which belongs to the technical field of electrical equipment and comprises an upper frame and a lower frame fixedly connected with the upper frame, wherein the upper frame is rotatably connected with a main shaft, a movable contact knife is sleeved in the main shaft, the upper end of the upper frame is fixedly connected with a fixed contact knife which is matched with the movable contact knife to realize a closing function, the upper frame extends downwards relative to the main shaft to form first clapboards arranged at two sides of the fixed contact knife, the upper frame is connected with the lower frame through an insulating board, a creepage hole is formed in the insulating board, second clapboards extending towards one side relative to the insulating board are arranged at two sides of the creepage hole, the exposed part of the movable contact knife is reduced, the first clapboards are arranged at two sides of the fixed contact knife in an extending way to effectively isolate electric arcs and increase the creepage distance of the electric arcs, the second clapboards are arranged at two sides of the creepage hole in an extending way, electric arcs generated at a connecting terminal are isolated to increase the creepage distance of the electric arcs, the insulating property of the circuit breaker of the environment-friendly cabinet is improved, and the influence of electric arcs on products is reduced.

Description

Circuit breaker of environment-friendly cabinet

Technical Field

The utility model belongs to the technical field of electrical equipment, and particularly relates to an environment-friendly cabinet breaker.

Background

In an electric power transmission and transformation system, a 10kV environment-friendly cabinet is very important electrical equipment in an electric power system, is used as typical terminal distribution equipment in the electric power system and various industrial users in a large quantity, is an indispensable product in an intelligent power grid, and is directly related to safe and reliable operation of the power grid. Because SF6 gas has excellent insulation and arc extinguishing performance, an SF6 insulation environment-friendly cabinet is generally adopted in a power grid at present, and full insulation of one part is realized through SF6 gas, however, SF6 gas is taken as one of six greenhouse gases specified in Kyoto protocol, the SF6 gas molecule is 23900 times of the greenhouse effect of CO2 gas molecule, and the decay period of SF6 molecule is very long, which is about 3200 years.

With the urgent need of accelerating transformation and upgrading pace and saving energy and reducing emission in the power industry in China, the control of global warming and the treatment of air pollution become an irreparable task, and environment-friendly gas insulated cabinets are increasingly applied

The existing environmental protection cabinet circuit breaker has the following defects in use.

Because the inside movable contact sword part metal part of environmental protection cabinet circuit breaker exposes more to when this movable contact sword and stationary contact sword mesh, produce a large amount of electric arcs easily, this electric arc can't obtain effectual elimination, traditional environmental protection cabinet circuit breaker produces electric arc easily in binding post department simultaneously, and creepage distance is shorter, thereby influences the product and uses easily. Therefore, it is necessary to provide an environmentally friendly cabinet breaker.

Disclosure of Invention

Aiming at the problems that electric arcs at the movable contact knife, the static contact knife and the wiring terminal of the existing environment-friendly cabinet breaker cannot be effectively eliminated and the creepage distance is short, the utility model provides the environment-friendly cabinet breaker. In the slotted hole of insulation board was arranged in to binding post, extended in creepage hole both sides and set up the second baffle, the electric arc that effective isolated binding post department produced increases the creepage distance of this electric arc simultaneously, has further improved the insulating properties of this environmental protection cabinet circuit breaker, effectively reduces the influence that electric arc produced the product.

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides an environmental protection cabinet circuit breaker, includes the upper ledge, with upper ledge fixed connection's underframe, the upper ledge rotates and is connected with the main shaft, the main shaft endotheca is equipped with the movable contact sword, upper ledge upper end fixedly connected with realizes the stationary contact sword of combined floodgate function with the cooperation of movable contact sword, the relative main shaft downwardly extending of upper ledge forms the first baffle of arranging stationary contact sword both sides in, the movable contact sword rotates to be connected in the explosion chamber, and this explosion chamber lower extreme is connected with binding post, be connected through the insulation board between upper ledge and the underframe, it has the creepage hole to open on the insulation board, and this creepage hole both sides are equipped with the second baffle that relative insulation board extends to one side.

Preferably, the first partition plate and the upper frame are integrally formed, one side of the main shaft is provided with an insertion hole for inserting and installing the movable contact knife, and the first partition plate and the main shaft are both made of PC insulating materials.

Preferably, the insulating plate, the upper frame and the lower frame are fixedly assembled through screws, a slot for placing a wiring terminal is formed in the insulating plate, the slot is arranged on one side of the creepage hole, and the second partition plate is arranged between the slot and the creepage hole.

Preferably, one side of the upper frame is also provided with a grounding static contact knife for meshing the moving contact knife.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the main shaft made of PC insulation material is sleeved outside the movable contact knife, the exposed part of the movable contact knife is reduced, meanwhile, the first partition plates are arranged on the two sides of the static contact knife in an extending manner, the length of each first partition plate extends to the meshing position of the movable contact knife and the static contact knife, electric arcs are effectively isolated, and the creepage distance of the electric arcs is increased. In the slotted hole of insulation board was arranged in to binding post, extended in creepage hole both sides and set up the second baffle, the electric arc that effective isolated binding post department produced increases the creepage distance of this electric arc simultaneously, has further improved the insulating properties of this environmental protection cabinet circuit breaker, effectively reduces the influence that electric arc produced the product.

Drawings

Fig. 1 is a schematic diagram of an overall structure of an environmental protection cabinet circuit breaker.

Fig. 2 is a schematic diagram of an overall structure of an environmental protection cabinet circuit breaker.

Fig. 3 is a schematic diagram of an internal structure of the breaker of the environmental protection cabinet.

Fig. 4 is a schematic structural view of a main shaft of the breaker of the environmental protection cabinet.

Fig. 5 is a schematic structural diagram of an insulating plate of an eco-friendly tank breaker.

The corresponding relationship between the reference numbers of the figures and the names of the components in the figures is as follows:

1. an upper frame; 2. a main shaft; 3. a first separator; 4. a stationary contact knife; 5. an insulating plate; 5.1, creepage hole; 5.2, a second clapboard; 6. moving a movable contact knife; 7. a lower frame; 8. an arc extinguishing chamber; 9. and a terminal.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-5, which is a schematic structural diagram of an eco-friendly cabinet breaker according to a preferred embodiment of the present invention, in this embodiment, the eco-friendly cabinet breaker includes an upper frame 1 and a lower frame 7 fixedly connected to the upper frame 1, the upper frame 1 is rotatably connected to a main shaft 2, a movable contact knife 6 is sleeved in the main shaft 2, a stationary contact knife 4 cooperating with the movable contact knife 6 to achieve a closing function is fixedly connected to an upper end of the upper frame 1, the upper frame 1 extends downward relative to the main shaft 2 to form a first partition plate 3 disposed at two sides of the stationary contact knife 4, the movable contact knife 6 is rotatably connected to an arc extinguish chamber 8, a connection terminal 9 is connected to a lower end of the arc extinguish chamber 8, the upper frame 1 is connected to the lower frame 7 through an insulation plate 5, a creepage hole 5.1 is formed in the insulation plate 5, second partition plates 5.2 extending to one side relative to the insulation plate 5 are disposed at two sides of the creepage hole 5.1, the main shaft 2 made of a PC insulation material is sleeved outside the movable contact knife 6, reduce the exposed part of movable contact sword 6, extend simultaneously in quiet 4 both sides of touching sword and set up first baffle 3, this first baffle 3 length extends to the meshing department of movable contact sword 6 and quiet 4 of touching sword, effectively isolated electric arc, increases the creepage distance of electric arc, has further improved the insulating properties of this environmental protection cabinet circuit breaker, effectively reduces the influence that electric arc produced the product.

In this embodiment, the first partition plate 3 and the upper frame 1 are integrally formed, one side of the main shaft 2 is provided with a jack for inserting the movable contact knife 6, the first partition plate 3 and the main shaft 2 are both made of PC insulating materials, the strength between the first partition plate 3 and the upper frame 1 is higher due to the use of the integral forming, and the movable contact knife 6 is inserted into the main shaft 2, so that the installation and the disassembly are convenient.

In this embodiment, insulation board 5, go up through the screw fixation assembly between frame 1 and the underframe 7, it has the slotted hole that supplies binding post 9 to place to open on the insulation board 5, creepage hole 5.1 one side is arranged in to this slotted hole, and in the middle of this slotted hole and creepage hole 5.1 are arranged in to second baffle 5.2, binding post 9 is arranged in the slotted hole of insulation board 5, it sets up second baffle 5.2 to extend in creepage hole 5.1 both sides, effectively isolated binding post 9 department produces electric arc, increase the creepage distance of this electric arc simultaneously, the insulating properties of this environmental protection cabinet circuit breaker has further been improved, effectively reduce the influence that electric arc produced the product.

In this embodiment, a grounding stationary contact knife for engaging the moving contact knife 6 is further disposed on one side of the upper frame 1 to realize switching operation states.

While the utility model has been described in further detail in connection with specific embodiments thereof, it will be understood that the utility model is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the utility model, which should be considered to be within the scope of the utility model as defined by the appended claims.

Claims

1. A circuit breaker of an environment-friendly cabinet,

the method is characterized in that:

comprises an upper frame (1), a lower frame (7) fixedly connected with the upper frame (1), the upper frame (1) is rotationally connected with a main shaft (2), a movable contact knife (6) is sleeved in the main shaft (2), the upper end of the upper frame (1) is fixedly connected with a static contact knife (4) which is matched with the movable contact knife (6) to realize the closing function, the upper frame (1) extends downwards relative to the main shaft (2) to form a first clapboard (3) arranged at two sides of the static contact knife (4), the movable contact knife (6) is rotationally connected with the arc extinguish chamber (8), the lower end of the arc extinguish chamber (8) is connected with a wiring terminal (9), the upper frame (1) is connected with the lower frame (7) through an insulating plate (5), the insulating plate (5) is provided with a creepage hole (5.1), two sides of the creepage hole (5.1) are provided with second clapboards (5.2) which extend to one side relative to the insulation board (5).

2. The environmentally friendly cabinet circuit breaker of claim 1, wherein: the first partition plate (3) and the upper frame (1) are integrally formed, one side of the main shaft (2) is provided with an insertion hole for inserting and installing the movable contact knife (6), and the first partition plate (3) and the main shaft (2) are both made of PC insulating materials.

3. The environmentally friendly cabinet circuit breaker of claim 1, wherein: the insulating plate (5), the upper frame (1) and the lower frame (7) are fixedly assembled through screws, a slotted hole for placing a wiring terminal (9) is formed in the insulating plate (5), the slotted hole is formed in one side of the creepage hole (5.1), and the second partition plate (5.2) is arranged between the slotted hole and the creepage hole (5.1).

4. The environmentally friendly cabinet circuit breaker of claim 1, wherein: and one side of the upper frame (1) is also provided with a grounding static contact knife for meshing the movable contact knife (6).