CN212392174U

CN212392174U - Vacuum switch tube for indoor circuit breaker

Info

Publication number: CN212392174U
Application number: CN202021225084.6U
Authority: CN
Inventors: 张雍; 胡闻问; 李志勇
Original assignee: WUHAN FEITE ELECTRIC CO Ltd
Current assignee: WUHAN FEITE ELECTRIC CO Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-01-22
Anticipated expiration: 2030-06-29

Abstract

The utility model discloses a belong to the technical field of power switch, specifically a vacuum switch tube for indoor circuit breaker, including ceramic shell, movable end cover, shield cover and quiet end cover, the top of ceramic shell is brazed the movable end cover, the bottom of ceramic shell is brazed the quiet end cover, the circumference inner wall of ceramic shell is brazed the shield cover, this kind of vacuum switch tube for indoor circuit breaker adopts the nine five porcelain of isostatic pressing that homogeneity and uniformity are good and guaranteed the size circularity and the internal diameter requirement of jumbo size porcelain shell, satisfies the relevant performance requirement of vacuum switch tube to the porcelain shell simultaneously, has guaranteed to satisfy the bearing capacity requirement of vacuum switch tube through setting up the buckle to the outside of shield cover, and cooperate with the boss buckle of ceramic shell inside, the temperature rise and the heat dissipation requirement when the vacuum tube through-flow through the rational overall arrangement and the optimal design to the inside space of vacuum switch tube, the performance is reliable and stable.

Description

Vacuum switch tube for indoor circuit breaker

Technical Field

The utility model relates to a power switch technical field specifically is an indoor vacuum switch tube for circuit breaker.

Background

The power switch is a general name for power distribution equipment such as a high-voltage power distribution cabinet, a generator, a transformer, a power line, a circuit breaker, a low-voltage switch cabinet, a switchboard, a switch box, a control box and the like in a power system, and the power switch comprises a vacuum arc-extinguishing chamber.

A vacuum arc-extinguishing chamber, also known as a vacuum switch tube, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical engineering, railways, broadcasting, communication, industrial high-frequency heating and the like. The device has the characteristics of energy conservation, material conservation, fire prevention, explosion prevention, small volume, long service life, low maintenance cost, reliable operation, no pollution and the like. The vacuum arc-extinguishing chamber is divided into an arc-extinguishing chamber for a circuit breaker and an arc-extinguishing chamber for a load switch from the aspect of use, the arc-extinguishing chamber for the circuit breaker is mainly used for transformer substations and power grid facilities in the power sector, and the arc-extinguishing chamber for the load switch is mainly used for end users of a power grid.

Vacuum switching tubes are classified into vacuum arc-extinguishing chambers for circuit breakers, vacuum arc-extinguishing chambers for load switches, vacuum arc-extinguishing chambers for contactors, vacuum arc-extinguishing chambers for reclosers, vacuum arc-extinguishing chambers for sectionalizers and other vacuum arc-extinguishing chambers for special purposes according to their uses.

With the wide application of high-power equipment in the industries of metallurgy, chemical engineering and the like, corresponding high-current and high-break vacuum switches come into force, higher requirements are put forward for the design and production of high-current vacuum switch tubes, and the existing defects mainly include poor control effect of firing deformation of large-size isostatic pressing metalized ceramic shells, weak combination mode of the outer diameter size of a shielding cover of the vacuum switch tubes and the inner diameter size of a middle sealing part of the ceramic shells and poor heat dissipation effect of the vacuum switches after the power-on temperature is raised.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an indoor vacuum switch tube for circuit breaker to solve the current drawback that proposes in the above-mentioned background art and mainly be the poor, the vacuum switch tube shield cover external diameter size of the control effect who seals the firing deformation of jumbo size isostatic pressing metallization porcelain shell and seal the poor problem of radiating effect after the circular telegram temperature rise of internal diameter size fit clearance combination mode in porcelain shell.

In order to achieve the above object, the utility model provides a following technical scheme: a vacuum switch tube for an indoor circuit breaker comprises a ceramic shell, a movable end cover, a shielding cover and a static end cover, the top of the ceramic shell is brazed with the movable end cover, the bottom of the ceramic shell is brazed with the static end cover, the shielding cover is brazed on the circumferential inner wall of the ceramic shell, a lug boss is integrally formed and connected on the circumferential inner wall of the ceramic shell, the bottom of the inner cavity of the movable end cover is brazed with a nest, the top of the movable end cover is provided with a round hole, the circumferential inner wall of the round hole is inserted with a movable rod, the circumferential outer wall of the moving rod is brazed with a fixing ring, the bottom of the moving rod is brazed with a corrugated pipe, the bottom of the corrugated pipe is brazed with a protective cover, the shielding cover is brazed on the circumferential outer wall of the protective cover, the circumferential outer wall of the shielding cover is integrally connected with a buckle plate, the top and the bottom of the shielding cover are integrally connected with through holes, and the bottom of the static end cover is brazed with a static rod.

Preferably, the ceramic shell is made of a nine-five alumina ceramic piece, and the circumferential outer wall of the ceramic shell is integrally connected with an external groove.

Preferably, the bottom of the protective cover and the top of the static rod are respectively brazed with a movable contact and a static contact.

Preferably, the structure of the buckle plate is matched with that of the boss.

Preferably, a fixed bolt is brazed at the bottom of the static end cover, and the static end cover is fixedly connected with the static rod through the fixed bolt.

Compared with the prior art, the beneficial effects of the utility model are that: this kind of vacuum switch tube for indoor circuit breaker, through the combination application of accessory, adopt the good isostatic pressing nine five porcelain of homogeneity and uniformity and guaranteed the size circularity and the internal diameter requirement of jumbo size porcelain shell, satisfy the vacuum switch tube simultaneously and to the relevant performance requirement of porcelain shell, through setting up the buckle to the outside at the shield, and cooperate the inside boss buckle of ceramic shell, rational design has guaranteed to satisfy the requirement of vacuum switch tube heavy current bearing capacity, temperature rise and heat dissipation requirement when having satisfied the vacuum tube through the through-flow through rational layout and the optimal design to vacuum switch tube inner space, the dependable performance is stable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the inside of the structure of the present invention.

In the figure: 100 ceramic shells, 110 external thread grooves, 120 bosses, 200 movable end covers, 210 nesting, 220 fixed rings, 230 movable rods, 240 corrugated pipes, 250 protective covers, 300 shielding covers, 310 pinch plates, 320 through holes, 400 static end covers, 410 static rods and 420 fixed bolts.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a vacuum switch tube for an indoor circuit breaker, which can conveniently meet the related performance requirements, has good combination mode and is convenient for heat dissipation, and please refer to fig. 1-2, and comprises a ceramic shell 100, a movable end cover 200, a shielding cover 300 and a static end cover 400;

referring to fig. 2 again, the outer circumferential wall of the ceramic case 100 has an external groove 110, specifically, the ceramic case 100 is made of a nine-five aluminum oxide ceramic piece, the outer circumferential wall of the ceramic case 100 is integrally connected with the external groove 110, and the inner circumferential wall of the ceramic case 100 is integrally connected with a boss 120;

referring to fig. 2 again, the bottom of the movable end cap 200 is fixedly connected to the top of the ceramic housing 100, specifically, the movable end cap 200 is brazed to the top of the ceramic housing 100, the bottom of the inner cavity of the movable end cap 200 is brazed with the nest 210, the top of the movable end cap 200 is provided with a circular hole, the circumferential inner wall of the circular hole is inserted with the movable rod 230, the circumferential outer wall of the movable rod 230 is brazed with the fixing ring 220, the bottom of the movable rod 230 is brazed with the bellows 240, and the bottom of the bellows 240 is brazed with the protective cover 250;

referring to fig. 2 again, the outside of the shield can 300 is brazed with the inner cavity of the ceramic case 100, specifically, the circumferential inner wall of the ceramic case 100 is brazed with the shield can 300, the circumferential outer wall of the protective cover 250 is brazed with the shield can 300, the circumferential outer wall of the shield can 300 is integrally connected with a buckle plate 310, and the top and the bottom of the shield can 300 are integrally connected with a through hole 320;

referring to fig. 2 again, the top of the stationary end cap 400 is connected to the bottom of the ceramic case 100, specifically, the stationary end cap 400 is brazed to the bottom of the ceramic case 100, and the stationary rod 410 is brazed to the bottom of the stationary end cap 400;

when the vacuum switch tube is used specifically, the outer thread groove 110 is integrally formed and connected on the outer part of the ceramic shell 100, the boss 120 is integrally formed and connected on the inner part of the ceramic shell 100, the movable end cover 200 and the static end cover 400 are respectively combined at two ends of the ceramic shell 100, the movable rod 230 is inserted in the fixed ring 220 after a sealing structure is formed, the shielding cover 300 is brazed in the inner part, the shielding cover 300 is buckled and combined with the boss 120 by utilizing the buckle plate 310, the movable and static contacts are internally combined, the through holes 320 are formed at two ends of the shielding cover 300, the combination and connection of the two ends are convenient, the size roundness and the inner diameter requirements of the large-size ceramic shell are ensured by adopting the nine-five isostatic pressing porcelains with good uniformity and consistency, the related performance requirements of the vacuum switch tube on the ceramic shell are met, the buckle plate 310 is arranged on the outer part of the shielding cover 300 and matched with the buckle of the boss 120 in the, the temperature rise and heat dissipation requirements of the vacuum tube during through-flow are met through reasonable layout and optimal design of the inner space of the vacuum switch tube, and the performance is reliable and stable.

Referring to fig. 2 again, in order to ensure the integrity of the assembly of the fittings and achieve the purpose of using the assembly conventionally, in particular, the bottom of the protective cover 250 and the top of the stationary rod 410 are respectively soldered with a moving contact and a stationary contact.

Referring to fig. 2 again, in order to ensure the stable combination of the buckle plate 310 and the boss 120, specifically, the structure of the buckle plate 310 matches with the structure of the boss 120.

Referring to fig. 2 again, in order to ensure the stability of the combination of the stationary end cover 400 and the stationary rod 410, specifically, a fixing bolt 420 is brazed at the bottom of the stationary end cover 400, and the stationary end cover 400 is fixedly connected to the stationary rod 410 through the fixing bolt 420.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A vacuum switch tube for an indoor circuit breaker is characterized in that: including ceramic package (100), move end cap (200), shield cover (300) and quiet end cap (400), the top of ceramic package (100) is brazed move end cap (200), the bottom of ceramic package (100) is brazed quiet end cap (400), the circumference inner wall of ceramic package (100) is brazed shield cover (300), the circumference inner wall integrated into one piece of ceramic package (100) is connected with boss (120), the inner chamber bottom of moving end cap (200) is brazed has nested (210), the round hole has been seted up at the top of moving end cap (200), the circumference inner wall of round hole is pegged graft and is moved pole (230), the circumference outer wall of moving pole (230) is brazed has solid fixed ring (220), the bottom of moving pole (230) is brazed has bellows (240), the bottom of bellows (240) is brazed has safety cover (250), the circumference outer wall of safety cover (250) is brazed shield cover (300), the shield cover is characterized in that a buckle plate (310) is integrally formed on the outer wall of the circumference of the shield cover (300), a through hole (320) is integrally formed at the top and the bottom of the shield cover (300), and a static rod (410) is brazed at the bottom of the static end cover (400).

2. The vacuum interrupter for an indoor circuit breaker of claim 1, wherein: the material of ceramic package (100) is nine five alumina porcelain spares, ceramic package (100) circumference outer wall integrated into one piece is connected with external pattern recess (110).

3. The vacuum interrupter for an indoor circuit breaker of claim 1, wherein: and the bottom of the protective cover (250) and the top of the static rod (410) are respectively brazed with a movable contact and a static contact.

4. The vacuum interrupter for an indoor circuit breaker of claim 1, wherein: the structure of the buckle plate (310) is matched with that of the boss (120).

5. The vacuum interrupter for an indoor circuit breaker of claim 1, wherein: the bottom of the static end cover (400) is brazed with a fixing bolt (420), and the static end cover (400) is fixedly connected with the static rod (410) through the fixing bolt (420).