CN218676931U

CN218676931U - Vacuum circuit breaker with high switching-on and switching-off speed

Info

Publication number: CN218676931U
Application number: CN202223052508.5U
Authority: CN
Inventors: 卫兆华; 刘家良
Original assignee: Guizhou Hualiang Electric Co ltd
Current assignee: Guizhou Hualiang Electric Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-21
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a fast vacuum circuit breaker of combined floodgate speed, the utility model relates to a vacuum circuit breaker technical field. According to the vacuum circuit breaker with the high opening and closing speeds, the friction ring and the spring are arranged in the buffer sealing block, when the movable conducting rod with larger kinetic energy contacts the static contact, the static contact can also compress the spring to slide while contacting the movable conducting rod, and meanwhile, the friction force between the friction ring and the buffer sealing block effectively slows down the sliding speed of the static contact, so that the static contact and the movable conducting rod are prevented from being separated from contact due to the fact that the sliding speed is too high after the static contact and the movable conducting rod are contacted, the contact stability of the movable and static contacts can be ensured, and the impact intensity between the movable and static contacts can be effectively relieved; when the movable conducting rod slides outwards to be separated from the static contact, the compressed spring pushes the static contact back to the original position, and meanwhile, the friction force between the friction ring and the buffering sealing block reduces the return speed of the static contact, so that the movable contact and the static contact are separated quickly.

Description

Vacuum circuit breaker with high switching-on and switching-off speed

Technical Field

The utility model relates to a vacuum circuit breaker technical field specifically is a fast vacuum circuit breaker of switching on and off speed.

Background

The existing rapid vacuum circuit breaker mainly uses an electromagnetic operating mechanism to open and close the gate, and the electromagnetic operating mechanism can enable a movable conducting rod to make a response in a very short time after receiving an instruction, so that the opening and closing speed of the vacuum circuit breaker is effectively reduced.

Because the electromagnetic operating mechanism can make the movable conducting rod react in a very short time, the operating mechanism is required to apply very large kinetic energy to the movable conducting rod, so that the movable conducting rod extends out or retracts in a very short time to reduce the opening and closing contact time of the movable contact and the static contact.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a fast vacuum circuit breaker of switching-on/off speed has solved the problem that current quick switching-on/off vacuum circuit breaker internals received life reduction after great impact.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a fast vacuum circuit breaker of switching-on/off speed, includes control box and the explosion chamber of fixed mounting at the control box top, the explosion chamber include with control box fixed connection move the end cover board, fixed mounting move the ceramic casing at end cover board top and the quiet end cover board of fixed mounting at the ceramic casing top, quiet end cover board sliding connection has the end that moves the conducting rod, and moves the conducting rod and peg graft inside the control box, quiet end cover board lower fixed surface has quiet conducting rod, and quiet conducting rod lower extreme outer wall is fixed with the buffering sealed piece, buffering sealed piece lower extreme sliding connection has the static contact, moves end cover board upper surface fixed with the cover and establish the bellows that moves on the conducting rod, and the bellows keeps away from the one end of moving the end cover board and be fixed with the bellows shield cover, be fixed with the shielding section of thick bamboo between bellows shield cover and the buffering sealed piece.

Preferably, a sliding hole is formed in the buffering sealing block, the end of the static conductive rod is inserted into the sliding hole and is fixedly connected with the buffering sealing block, one end of the static contact is inserted into the sliding hole and is slidably connected with the buffering sealing block, a protrusion is arranged at the end of the static contact, a groove matched with the protrusion is formed in the end of the static conductive rod, and the protrusion of the end of the static contact is inserted into the groove in the end of the static conductive rod.

Preferably, a plurality of springs are arranged inside the buffering sealing block, and two ends of each spring are respectively abutted to the end part of the static conductive rod and the end part of the static contact.

Preferably, the outer wall of the fixed contact inserted at one end inside the buffer sealing block is provided with a ring groove and is fixedly connected with a friction ring through the ring groove, and the outer wall of the friction ring is in close contact with the inner wall of the buffer sealing block.

Preferably, be provided with the backing plate between control box and the explosion chamber, the backing plate passes through bolt fixed mounting at the control box top, explosion chamber fixed mounting is at the backing plate top, it runs through the backing plate and extends to inside the control box to move the conducting rod.

Preferably, the base plate comprises a female base plate and a male base plate, wherein the side wall of the female base plate is provided with a clamping groove, and the side wall of the male base plate is provided with a clamping block matched with the clamping groove.

Advantageous effects

The utility model provides a fast vacuum circuit breaker of combined floodgate speed. Compared with the prior art, the method has the following beneficial effects:

(1) The vacuum circuit breaker with the high opening and closing speed has the advantages that the friction ring and the spring are arranged inside the buffering sealing block, when the movable conducting rod with larger kinetic energy contacts the static contact, the static contact can also compress the spring to slide while contacting the movable conducting rod, meanwhile, the friction force between the friction ring and the buffering sealing block effectively slows down the sliding speed of the static contact, the static contact and the movable conducting rod are prevented from being separated from contact due to the fact that the sliding speed is too high after the static contact and the movable conducting rod are contacted, the contact stability of the movable and static contacts can be guaranteed, and the impact intensity between the movable and static contacts can be effectively relieved; when the movable conducting rod slides outwards to be separated from the static contact, the compressed spring pushes the static contact back to the original position, and meanwhile, the friction force between the friction ring and the buffering sealing block can also reduce the return speed of the static contact, so that the contact time between the movable contact and the static contact is effectively reduced, and the movable contact and the static contact are quickly separated.

(2) This fast vacuum circuit breaker of divide-shut brake speed through setting up the backing plate of compriseing negative backing plate and positive backing plate, and the long-term work of spring leads to length to shorten, and when quiet contact tip long-term work led to wearing and tearing simultaneously, the static contact can the grow with the interval that moves the conducting rod tip this moment, and the user of this moment can take off the backing plate to this increase moves the conducting rod and stretches into the inside length of explosion chamber, offsets the static contact with this and moves the distance that increases between the conducting rod.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the arc extinguish chamber of the utility model;

fig. 3 is a sectional view of the buffering seal block of the present invention;

fig. 4 is a schematic view of the structure of the backing plate of the present invention.

In the figure: 1. an operation box; 2. an arc extinguishing chamber; 3. a movable end cover plate; 4. a stationary end cover plate; 5. a ceramic housing; 6. a movable conductive rod; 7. a static conductive rod; 8. a buffer seal block; 9. carrying out static contact; 10. a bellows; 11. a bellows shield; 12. a shielding cylinder; 13. a friction ring; 14. a spring; 15. a base plate; 151. a female backing plate; 152. and (4) a male backing plate.

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.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a fast vacuum circuit breaker of speed of breaking and shutting, including control box 1 and the explosion chamber 2 of fixed mounting at control box 1 top, the inside electromagnetic operation mechanism that adopts of control box 1, be convenient for divide and shut the movable contact of explosion chamber 2 inside fast, explosion chamber 2 includes the movable end cover plate 3 with control box 1 fixed connection, fixed mounting is at ceramic package 5 and the quiet end cover plate 4 of fixed mounting at ceramic package 5 top of movable end cover plate 3 top, quiet end cover plate 4 sliding connection has movable conducting rod 6, and the tip of movable conducting rod 6 is pegged graft inside control box 1, quiet end cover plate 4 lower surface is fixed with static conducting rod 7, and the outer wall of static conducting rod 7 lower extreme is fixed with buffering seal 8, buffering seal 8 lower extreme sliding connection has static contact 9, buffering seal 8 can effectively alleviate the impact that static contact 9 received, make the kinetic energy exchange time between static contact 9 and the movable conducting rod 6 lengthen, thereby effectively increase the life of static contact 9, movable end cover plate 3 upper surface is fixed with bellows 10 cover on movable conducting rod 6, and bellows 10 keeps away from the one end cover plate 3 one end and is fixed with bellows cover 11, there is the sealed 12 that there is the buffering.

A sliding hole is formed in the buffer sealing block 8, the end part of the static conductive rod 7 is inserted in the sliding hole and is fixedly connected with the buffer sealing block 8, one end of the static contact 9 is inserted in the sliding hole and is slidably connected with the buffer sealing block 8, a protrusion is arranged at the end part of the static contact 9, a groove matched with the protrusion is formed in the end part of the static conductive rod 7, and the protrusion at the end part of the static contact 9 is inserted in the groove at the end part of the static conductive rod 7, so that the static contact 9 is always inserted in the static conductive rod 7, and a circuit between the static contact and the static conductive rod is kept smooth.

The plurality of springs 14 are arranged inside the buffer sealing block 8, two ends of each spring 14 are respectively abutted against the end portion of the static conductive rod 7 and the end portion of the static contact 9, when the static contact 9 slides due to impact, the springs 14 are compressed to reduce the moving speed of the static contact 9, so that the static contact 9 and the movable conductive rod 6 are always connected, the impact intensity of the static contact 9 is effectively reduced, and excessive abrasion of parts due to the fact that the static contact 9 cannot move after being impacted is avoided.

In order to avoid that the spring 14 is compressed too fast to cause the static contact 9 and the movable conducting rod 6 to be separated from contact, an annular groove is formed in the outer wall of one end, inserted into the buffering sealing block 8, of the static contact 9, a friction ring 13 is fixedly connected with the annular groove, the outer wall of the friction ring 13 is in close contact with the inner wall of the buffering sealing block 8, the friction force between the friction ring 13 and the buffering sealing block 8 can effectively reduce the compression speed of the spring 14, the spring 14 is shortened and slowed down to enable the static contact 9 to be in contact with the movable conducting rod 6 moving at a high speed all the time after the static contact 9 and the movable conducting rod 6 are in contact with each other to absorb kinetic energy, and the static contact 9 and the movable conducting rod 6 are prevented from being separated from contact after the static contact and the movable conducting rod 6 absorb kinetic energy.

Because the length can reduce after spring 14 uses for a long time, simultaneously static contact 9 and move conducting rod 6 and all can produce wearing and tearing after the long-time collision of back tip, these all can lead to the distance grow between static contact 9 and the moving conducting rod 6, in order to eliminate this section because the distance that uses for a long time and produce, be provided with backing plate 15 between control box 1 and explosion chamber 2, backing plate 15 passes through bolt fixed mounting at control box 1 top, explosion chamber 2 fixed mounting is at backing plate 15 top, move conducting rod 6 and run through backing plate 15 and extend to inside control box 1, backing plate 15 can set up a plurality ofly.

In order to facilitate a user to detach the base plate 15 without detaching the arc extinguish chamber 2, the base plate 15 comprises a female base plate 151 and a male base plate 152, a clamping groove is formed in the side wall of the female base plate 151, a clamping block matched with the clamping groove is formed in the side wall of the male base plate 152, the user only needs to take down a bolt from the base plate 15, detach the male base plate 152 and the female base plate 151 to two sides, and then install the rest base plates 15 on the operation box 1 through the bolts; after the clamping block of the male backing plate 152 is inserted into the clamping groove of the female backing plate 151, the position between the female backing plate 151 and the male backing plate 152 is not a straight line any more, and external rainwater can be effectively prevented from entering the operation box 1 from a gap between the female backing plate 151 and the male backing plate 152.

And those not described in detail in this specification are well within the skill of those in the art.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fast vacuum circuit breaker of switching-on and switching-off speed, includes explosion chamber (2) at control box (1) top with fixed mounting, its characterized in that: the arc extinguish chamber (2) comprises a movable end cover plate (3) fixedly connected with the operation box (1), a ceramic shell (5) fixedly mounted at the top of the movable end cover plate (3) and a fixed end cover plate (4) fixedly mounted at the top of the ceramic shell (5), wherein the fixed end cover plate (4) is connected with a movable conducting rod (6) in a sliding manner, the end of the movable conducting rod (6) is inserted into the operation box (1), the lower surface of the fixed end cover plate (4) is fixedly provided with a fixed conducting rod (7), the outer wall of the lower end of the fixed conducting rod (7) is fixedly provided with a buffering sealing block (8), the lower end of the buffering sealing block (8) is connected with a fixed contact (9) in a sliding manner, the upper surface of the movable end cover plate (3) is fixedly provided with a corrugated pipe (10) sleeved on the movable conducting rod (6), and one end of the corrugated pipe (10) far away from the movable end cover plate (3) is fixedly provided with a corrugated pipe shielding cover (11), and a shielding cylinder (12) is fixed between the corrugated pipe shielding cover (11) and the buffering sealing block (8).

2. The vacuum circuit breaker with high switching speed according to claim 1, characterized in that: the novel static contact device is characterized in that a sliding hole is formed in the buffering sealing block (8), the end portion of the static conductive rod (7) is inserted into the sliding hole and fixedly connected with the buffering sealing block (8), one end of the static contact (9) is inserted into the sliding hole and slidably connected with the buffering sealing block (8), a protrusion is arranged at the end portion of the static contact (9), a groove matched with the protrusion is formed in the end portion of the static conductive rod (7), and the protrusion of the end portion of the static contact (9) is inserted into the groove in the end portion of the static conductive rod (7).

3. The vacuum circuit breaker with high switching speed according to claim 2, characterized in that: a plurality of springs (14) are arranged inside the buffer sealing block (8), and two ends of each spring (14) are respectively abutted against the end part of the static conductive rod (7) and the end part of the static contact (9).

4. The vacuum circuit breaker with high switching speed according to claim 3, characterized in that: the outer wall of static contact (9) grafting in buffering sealed piece (8) inside one end has seted up the annular, and has had friction ring (13) through annular fixedly connected with, friction ring (13) outer wall and buffering sealed piece (8) inner wall in close contact with.

5. The vacuum circuit breaker with high switching speed according to claim 4, characterized in that: be provided with between control box (1) and explosion chamber (2) backing plate (15), bolt fixed mounting is passed through at control box (1) top in backing plate (15), explosion chamber (2) fixed mounting is at backing plate (15) top, it runs through backing plate (15) and extends to inside control box (1) to move conducting rod (6).

6. The vacuum circuit breaker with high switching speed according to claim 5, characterized in that: the backing plate (15) comprises a female backing plate (151) and a male backing plate (152), wherein a clamping groove is formed in the side wall of the female backing plate (151), and a clamping block matched with the clamping groove is formed in the side wall of the male backing plate (152).