CN-224204023-U - High-voltage plastic shell isolating switch

CN224204023UCN 224204023 UCN224204023 UCN 224204023UCN-224204023-U

Abstract

The application relates to a high-voltage plastic shell isolating switch which comprises a contact assembly and an arc extinguishing assembly. The contact assembly comprises a fixed contact and a moving contact, wherein the fixed contact is fixedly arranged, the moving contact can be arranged in a movable mode relative to the fixed contact, the moving contact is electrically connected with the fixed contact in a contact mode, the arc extinguishing assembly comprises an arc extinguishing shell and gas generating pieces, an arc extinguishing space is arranged in the arc extinguishing shell, a moving path of the moving contact is positioned in the arc extinguishing space, the two gas generating pieces are positioned in the arc extinguishing space and are arranged at intervals, the fixed contact and the moving contact are both positioned between the two gas generating pieces, and the interval distance between the two gas generating pieces is 8mm to 12mm. When the scheme realizes that the moving contact and the fixed contact are disconnected, the exhaust speed is increased, the air flow is equally divided, the arc is efficiently extinguished, and zero arcing is further realized.

Inventors

LI FANGXI
CHEN XIANZHUO
MAO KUNMING
MA GUIZHI
YANG JIANFENG
XU JIE

Assignees

温州华嘉电器有限公司

Dates

Publication Date: 20260505
Application Date: 20250427

Claims (10)

1. The utility model provides a high voltage moulded case isolator, its characterized in that, high voltage moulded case isolator includes: The contact assembly comprises a fixed contact and a moving contact, wherein the fixed contact is fixedly arranged, the moving contact can be movably arranged relative to the fixed contact, the moving contact is electrically connected with the fixed contact when in contact, and the moving contact is electrically connected with the fixed contact when in contact The arc extinguishing assembly comprises an arc extinguishing shell and gas generating pieces, wherein an arc extinguishing space is arranged inside the arc extinguishing shell, the moving path of a moving contact is positioned in the arc extinguishing space, the two gas generating pieces are positioned in the arc extinguishing space and are arranged at intervals, the fixed contact and the moving contact are both positioned between the two gas generating pieces, and the interval distance between the two gas generating pieces is 8mm to 12mm.
2. The high voltage molded case disconnector of claim 1, wherein said arc suppressing assembly further comprises an arc suppressing gate sheet set connected to said gas generating members and at least partially positioned between said gas generating members, and said arc suppressing gate sheet set comprises a plurality of arc suppressing gate sheets, adjacent said arc suppressing gate sheets being disposed at intervals in a distribution direction, and said distribution direction being a direction perpendicular to an interval direction of said gas generating members.
3. The high-voltage molded case disconnecting switch according to claim 2, wherein the arc extinguishing space comprises a first cavity and a second cavity which are communicated, the first cavity is located above the second cavity, the length of the second cavity in the distribution direction of the arc extinguishing gate sheets is larger than that of the first cavity, and the moving path of the moving contact and the fixed contact are both located in the first cavity.
4. The high-voltage molded case disconnecting switch according to claim 3, wherein the arc extinguishing housing is provided with an air outlet, and the air outlet communicates with the arc extinguishing space and the outside.
5. The high-voltage molded case disconnecting switch according to claim 4, wherein the number of the air outlets is two, the two air outlets are respectively located at two sides of the distribution direction of the arc extinguishing gate sheet, and projections of the two air outlets along the distribution direction are at least partially overlapped.
6. The high voltage molded case circuit breaker of claim 4, wherein the arc suppressing assembly further comprises a deionization net covering the gas outlet.
7. The high voltage molded case isolator of claim 3, wherein the second cavity covers the arc suppressing housing in a direction of distribution of the arc suppressing gate sheets.
8. The high voltage molded case disconnecting switch according to claim 4, wherein the arc extinguishing case comprises a first case and a second case which are buckled, the installation direction of the first case and the second case is the same direction as the interval direction of the two gas generating members, and at least one of the first case and the second case is provided with a groove concavely provided along the edge of the arc extinguishing space and toward the other of the first case and the second case for inserting the other of the first case and the second case into the groove.
9. The high voltage molded case isolator of claim 1, further comprising an operating mechanism rotatably disposed to move the moving contact relative to the stationary contact.
10. The high voltage molded case disconnecting switch of claim 9 wherein said contact assemblies and said arc suppressing assemblies are provided in equal and one-to-one correspondence, said high voltage molded case disconnecting switch further comprising a transmission mechanism having one end connected to said operating mechanism and the other end connected to each of said contact assemblies such that all of said contact assemblies are controlled by said operating mechanism.

Description

High-voltage plastic shell isolating switch Technical Field The application relates to the technical field of isolating switches, in particular to a high-voltage plastic shell isolating switch. Background At the moment of the rapid rise of new energy, a direct current power system is widely applied to various scenes, such as key fields of photovoltaic power stations, energy storage facilities and the like. The photovoltaic and energy storage system is taken as two core support posts of a novel power system in the future, the industrial scale presents a strong situation of explosive growth, and the boundary of the market of the piezoelectric device is powerfully expanded. In the process, the direct current breaker and the plastic shell type isolating switch are used as key matched equipment for guaranteeing the safe and stable operation of the system, play a vital role, and can timely cut off a fault circuit, ensure the reliability and the safety of the whole power system and protect the stable operation of the light storage system. At present, most of the designs and the manufacturing of direct current breakers and isolating switches in the industry are mainly based on the traditional alternating current switches and are derived in a multipolar series connection mode. The design idea is based on the mature technology of the alternating current switch to a certain extent, and a plurality of switch units are combined in series to try to meet the disconnection requirements of the direct current circuit under different polarities and different voltage levels. However, the optical storage system has the remarkable characteristics of high energy density, high direct current breaking difficulty and the like, so that the conventional direct current breaker and isolating switch based on the multipolar series connection of the traditional alternating current switch have a plurality of potential risks, and cannot fully meet the development requirements of the industry. On one hand, the traditional design is difficult to quickly and effectively extinguish arc to cause continuous burning of electric arc, possibly causing serious safety accidents such as equipment damage, fire disaster and the like, on the other hand, the high-density mixed installation of components makes the internal structure of the product complex, the heat dissipation performance is poor, the reliability and the stability of the equipment are reduced, the volume and the cost of the product are increased, and the future development trend of compact and high-performance optical storage system is difficult to adapt. Disclosure of utility model Based on the problems of low applicable voltage, low safety and large product volume of the conventional isolating switch, the high-voltage plastic shell isolating switch is needed. A high voltage molded case isolator includes a contact assembly and an arc extinguishing assembly. The contact assembly comprises a fixed contact and a moving contact, wherein the fixed contact is fixedly arranged, the moving contact can be arranged relative to the fixed contact in a movable mode, the moving contact is electrically connected with the fixed contact in a contact mode, the arc extinguishing assembly comprises an arc extinguishing shell and a gas generating piece, an arc extinguishing space is arranged in the arc extinguishing shell, a moving path of the moving contact is arranged in the arc extinguishing space, the two gas generating pieces are arranged in the arc extinguishing space at intervals, the fixed contact and the moving contact are both arranged between the two gas generating pieces, and the interval distance between the two gas generating pieces is 8mm to 12mm. In one embodiment, the arc extinguishing assembly further comprises an arc extinguishing grid sheet group, wherein the arc extinguishing grid sheet group is connected to the gas generating pieces and at least partially positioned between the gas generating pieces, the arc extinguishing grid sheet group comprises a plurality of arc extinguishing grid sheets, the adjacent arc extinguishing grid sheets are arranged at intervals in the distribution direction, and the distribution direction is a direction perpendicular to the interval directions of the two gas generating pieces. In one embodiment, the arc extinguishing space comprises a first cavity and a second cavity which are communicated, the first cavity is located above the second cavity, the length of the second cavity in the distribution direction of the arc extinguishing grid plates is larger than that of the first cavity, and the moving path of the moving contact and the fixed contact are both located in the first cavity. In one embodiment, the arc extinguishing shell is provided with an air outlet, and the air outlet is communicated with the arc extinguishing space and the outside. In one embodiment, the number of the air outlets is two, the two air outlets are respectively located at two sides of