CN210110639U

CN210110639U - Pole-mounted circuit breaker

Info

Publication number: CN210110639U
Application number: CN201921147702.7U
Authority: CN
Inventors: 徐道才; 陈通化; 宦维平
Original assignee: Shanghai Yongda Electric Appliance Co Ltd
Current assignee: Shanghai Yongda Electric Appliance Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-02-21
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to a circuit breaker on post, including box, apron and be used for the balanced subassembly of the inside and outside atmospheric pressure of balanced box, balanced unit mount in the top of apron, balanced subassembly includes first check valve, second check valve and gas storage piece, first check valve admits air to the box inboard, the second check valve is given vent to anger by the inboard of apron, first check valve of gas storage piece intercommunication and second check valve, first check valve, second check valve and gas storage piece are made by insulating material. The utility model discloses have and reduced the inside gaseous medium of circuit breaker on the post and lead to inside and outside atmospheric pressure unbalance after being heated and take place the inflation, the box that leads to circuit breaker on the post takes place to explode the effect of the probability of splitting.

Description

Pole-mounted circuit breaker

Technical Field

The utility model belongs to the technical field of the technique of circuit breaker and specifically relates to a circuit breaker on post is related to.

Background

The structure form of an outdoor vacuum circuit breaker on a column is as follows: the high-voltage electrified part is arranged in a sealed box body, SF6 gas or an insulating cover is used as an insulating medium of the high-voltage electrified part, a conductive loop is led out of the sealed box body through a silicon rubber sleeve, and an operating mechanism is independently hung outside the sealed box body.

At present, chinese patent publication No. CN204966375U discloses an intelligent pole-mounted vacuum circuit breaker, which includes a base and a box body disposed on the base, wherein two sides of the box body are respectively provided with an incoming line terminal and an outgoing line terminal, and the box body is in a closed state.

However, in the above prior art, the cover plate is only fixed to the box body by bolts and nuts, and when the gas medium in the box body expands greatly due to excessive heat generation in the box body, and the bonding strength between the cover plate and the box body and the bonding strength of the whole box body cannot seal the internal gas, the whole box body is easily exploded.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker on post has and has reduced the inside gaseous medium of vacuum circuit breaker on post and lead to inside and outside atmospheric pressure unbalance after being heated and take place the inflation, leads to the box of circuit breaker on the post to take place the effect of the probability of exploding and splitting.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a circuit breaker on post, includes box, apron and is used for the balanced subassembly of the inside and outside atmospheric pressure of balanced box, balanced subassembly install in the top of apron, balanced subassembly includes first check valve, second check valve and gas storage spare, first check valve admits air to the box inboard, the second check valve is given vent to anger by the inboard of apron, first check valve of gas storage spare intercommunication and second check valve, first check valve, second check valve and gas storage spare are made by insulating material.

Through adopting above-mentioned technical scheme, work as because the calorific capacity of circuit breaker on the post is too big, after leading to being located the gas expansion of circuit breaker on the post, the inside atmospheric pressure of circuit breaker on the post increases, the second check valve is opened, make the inside too much gas of circuit breaker on the post can discharge the gas storage spare through the second check valve in the memory storage, make inside and outside atmospheric pressure can keep balance, thereby the probability that circuit breaker on the post takes place the explosion has been reduced, work load when circuit breaker inside on the post reduces, make after inside temperature begins to descend, inside atmospheric pressure reduces, the gas that is located the gas storage spare flows back again through first check valve and enters into in the box, thereby reduced and led to the insulating properties of box to reduce because of the insulating gas medium in the box runs off, the insulating nature inside of box has been guaranteed.

The utility model discloses further set up to: the gas storage piece is an elastic rubber tube, an insulating layer is arranged on the outer side of the gas storage piece, and the two sides of the gas storage piece are communicated with the first check valve and the second check valve respectively.

Through adopting above-mentioned technical scheme, set up the gas storage piece into an elasticity rubber tube for the gas storage piece can expand when receiving stronger atmospheric pressure, thereby has promoted the gas storage volume of gas storage piece.

The utility model discloses further set up to: the both sides of gas storage spare all are provided with the collar, the joint annular that supplies the collar joint is seted up at the top of apron, the both sides lateral wall of joint annular all is provided with the sealing washer, the inner wall of collar is provided with the sealed annular that corresponds with the sealing washer.

Through adopting above-mentioned technical scheme, interference fit has made things convenient for the installation between gas storage spare and the apron between collar and the joint annular, and all sets up the sealing washer at the both sides lateral wall of joint annular to promote the leakproofness between joint annular and the collar, thereby reduced the gas and passed through the joint annular and installed the probability that the clearance between changing runs off.

The utility model discloses further set up to: the sealing ring is provided with two layers along the height direction of the clamping ring groove.

Through adopting above-mentioned technical scheme, further promoted the leakproofness between collar and the joint annular.

The utility model discloses further set up to: the gas storage piece extends outwards towards one side of the mounting plate horizontally to form a positioning ring, a locking ring is arranged at the top of the mounting ring, the mounting ring is connected with the locking ring through a bolt, and the positioning ring is mounted between the locking ring and the mounting ring.

Through adopting above-mentioned technical scheme, the holding ring passes through the packing force completion between locking ring and the installing ring to the holding ring, during the installation, places the holding ring between locking ring and installing ring, locks locking ring and installing ring through the bolt afterwards to the holding ring that will be located between locking ring and installing ring compresses tightly.

The utility model discloses further set up to: the top and the bottom of the positioning ring are both provided with annular sealing bulges, and the sealing bulges are respectively pressed with the locking ring and the mounting ring.

Through adopting above-mentioned technical scheme, all be provided with annular sealed protruding at the top and the bottom of holding ring, and sealed protruding compresses tightly with locking ring and collar extension respectively to promote the holding ring respectively with locking ring, collar extension between the leakproofness.

The utility model discloses further set up to: the top of the cover plate is provided with an insulating cover covering the balance assembly, the bottom of the insulating cover is horizontally turned outwards to form a positioning flange, the positioning flange is connected with the cover plate through a bolt, and an insulating medium is filled between the cover plate and the insulating cover.

Through adopting above-mentioned technical scheme, set up insulating cover at the top of apron to reduce the probability that the electric arc that is located the box punctures check valve and gas storage spare, thereby ensured the security that the circuit breaker used on the post.

The utility model discloses further set up to: the bottom of the positioning flanging is provided with a sealing gasket, and the sealing gasket is tightly pressed with the cover plate.

Through adopting above-mentioned technical scheme, promoted the leakproofness between location turn-ups and the apron to when having reduced when the gas storage spare takes place to leak, can realize the storage to gas through the apron, thereby promoted the life of circuit breaker on the post to a certain extent.

To sum up, the utility model discloses a beneficial technological effect does:

1. the on-column circuit breaker has the advantages that by arranging the balance assembly, the probability of explosion of a box body of the on-column circuit breaker caused by unbalance of internal and external air pressures caused by expansion of a gas medium inside the on-column vacuum circuit breaker after heating is reduced;

2. the utility model has the advantages that the installation between the gas storage piece and the cover plate is convenient by arranging the installation ring;

3. above-mentioned utility model through setting up insulating cover, have the effect that has further reduced the probability of inside electric arc breakdown circuit breaker.

Drawings

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

Fig. 2 is a schematic diagram of the explosion structure of the present invention.

Fig. 3 is a schematic sectional structure of the present invention.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3.

In the figure, 1, a box body; 2. a pole top circuit breaker body; 3. a cover plate; 31. clamping the ring groove; 32. a seal ring; 33. an insulating cover; 331. positioning the flanging; 332. an insulating medium; 333. a gasket; 4. a balancing component; 41. a first check valve; 411. A housing; 4111. mounting grooves; 4112. covering the plywood; 4113. air holes are formed; 412. a ball bearing; 413. a compression spring; 42. a second one-way valve; 43. a gas storage member; 431. a mounting ring; 432. sealing the ring groove; 433. a positioning ring; 434. locking a ring; 435. and sealing the protrusion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a pole-mounted circuit breaker includes a case 1, a pole-mounted circuit breaker main body 2, a cover plate 3, and a balance assembly 4 for balancing air pressure inside and outside the case 1. The pole-mounted circuit breaker main body 2 is installed in the case 1.

Referring to fig. 3 and 4, a clamping ring groove 31 is formed in the top of the cover plate 3, sealing rings 32 are arranged on the side walls of two sides of the clamping ring groove 31, and the sealing rings 32 are arranged in two layers along the height direction of the clamping ring groove 31. The top of the cover plate 3 is provided with an insulating cover 33 covering the balance assembly 4, and the bottom of the insulating cover 33 is horizontally turned outwards to form a positioning flange 331.

The positioning flange 331 is connected with the cover plate 3 through a bolt, and an insulating medium 332 is filled between the cover plate 3 and the insulating cover 33, wherein in the embodiment, the insulating medium 332 is selected to be SF6 gas. The bottom of the positioning flange 331 is provided with a gasket 333, and the gasket 333 is tightly pressed with the cover plate 3.

The balancing assembly 4 is installed on the top of the cover plate 3, and the balancing assembly 4 includes a first check valve 41, a second check valve 42, and an air reservoir 43.

The first check valve 41 is used for air inlet towards the inner side of the box body 1, the second check valve 42 is used for air outlet from the inner side of the cover plate 3, the air storage piece 43 is communicated with the first check valve 41 and the second check valve 42, and the first check valve 41, the second check valve 42 and the air storage piece 43 are all made of insulating materials. In the present embodiment, the first check valve 41 and the second check valve 42 have the same structure.

First check valve 41 and second check valve 42 all include casing 411, ball 412 and compression spring 413, mounting groove 4111 has been seted up at the top of casing 411, ball 412 and compression spring 413 are all installed in mounting groove 4111, the top of mounting groove 4111 is provided with the lid board 4112 that closes mounting groove 4111, set up the vertical bleeder vent 4113 that runs through lid board 4112 and casing 411 on lid board 4112 and casing 411, ball 412 is made for insulating material, a rubber layer has been paintd to the outside of ball 412, in this embodiment, it is fixed to paste through the bonding agent between lid board 4112 and the mounting groove 4111, the aperture of bleeder vent 4113 is less than the diameter of ball 412.

The air storage member 43 is an elastic rubber tube, an insulating layer is disposed on the outer side of the air storage member 43, and two sides of the air storage member 43 are respectively communicated with the first check valve 41 and the second check valve 42.

Both sides of the gas storage piece 43 are provided with mounting rings 431, the mounting rings 431 are clamped in the clamping ring grooves 31, and the inner walls of the mounting rings 431 are provided with sealing ring grooves 432 corresponding to the sealing rings 32. The air storage member 43 extends horizontally outward toward one side of the mounting plate to form a positioning ring 433, a locking ring 434 is disposed on the top of the mounting ring 431, the mounting ring 431 and the locking ring 434 are connected by bolts, and the positioning ring 433 is mounted between the locking ring 434 and the mounting ring 431. The top and bottom of the positioning ring 433 are provided with annular sealing protrusions 435, and the sealing protrusions 435 are respectively pressed against the locking ring 434 and the mounting ring 431. In this embodiment, a gap for inserting the positioning ring 433 at the bottom of the gas storage 43 exists between the inner wall of the locking ring 434 and the outer side wall of the gas storage 43.

The use principle of the embodiment is as follows: when the calorific capacity of the circuit breaker on the column is too large, after the gas in the circuit breaker on the column expands, the internal gas pressure of the circuit breaker on the column increases, the second check valve 42 is opened, so that the excessive gas in the circuit breaker on the column can be discharged into the gas storage part 43 through the second check valve 42 for memorability storage, so that the internal gas pressure and the external gas pressure can be kept balanced, thereby reducing the probability of explosion of the circuit breaker on the column, when the internal work load of the circuit breaker on the column is reduced, after the internal temperature begins to drop, the internal gas pressure is reduced, the gas in the gas storage part 43 flows back again through the first check valve 41 to enter the box body 1, thereby reducing the insulating property reduction of the box body 1 caused by the loss of the insulating gas medium in the box body 1, and ensuring the insulating property in the box body 1.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a circuit breaker on post, includes box (1) and apron (3), its characterized in that: still including balanced subassembly (4) that is used for balancing the inside and outside atmospheric pressure of box (1), balanced subassembly (4) install in the top of apron (3), balanced subassembly (4) are including first check valve (41), second check valve (42) and gas storage spare (43), first check valve (41) are to box (1) inboard admit air, second check valve (42) are given vent to anger by the inboard of apron (3), gas storage spare (43) communicate first check valve (41) and second check valve (42), first check valve (41), second check valve (42) and gas storage spare (43) are made by insulating material.

2. A pole break as claimed in claim 1, characterized in that: the air storage piece (43) is an elastic rubber tube, an insulating layer is arranged on the outer side of the air storage piece (43), and two sides of the air storage piece (43) are communicated with the first one-way valve (41) and the second one-way valve (42) respectively.

3. A pole break as claimed in claim 2, characterized in that: the both sides of gas storage spare (43) all are provided with collar (431), joint annular (31) that supply collar (431) joint are seted up at the top of apron (3), the both sides lateral wall of joint annular (31) all is provided with sealing washer (32), the inner wall of collar (431) is provided with sealed annular (432) that correspond with sealing washer (32).

4. A pole break as claimed in claim 3, characterized in that: the sealing ring (32) is provided with two layers along the height direction of the clamping ring groove (31).

5. A pole break as claimed in claim 4, characterized in that: the gas storage piece (43) extends outwards horizontally towards one side of the mounting plate to form a positioning ring (433), a locking ring (434) is arranged at the top of the mounting ring (431), the mounting ring (431) is connected with the locking ring (434) through a bolt, and the positioning ring (433) is mounted between the locking ring (434) and the mounting ring (431).

6. A pole break as claimed in claim 5, characterized in that: annular sealing protrusions (435) are arranged at the top and the bottom of the positioning ring (433), and the sealing protrusions (435) are respectively pressed against the locking ring (434) and the mounting ring (431).

7. A pole break as claimed in claim 1, characterized in that: the top of apron (3) is provided with lid and closes insulating lid (33) of balanced subassembly (4), the bottom level of insulating lid (33) is turned over outwards and is rolled over and form location turn-ups (331), be connected through the bolt between location turn-ups (331) and apron (3), it has insulating medium (332) to fill between apron (3) and insulating lid (33).

8. A pole break as claimed in claim 7, characterized in that: the bottom of the positioning flanging (331) is provided with a sealing gasket (333), and the sealing gasket (333) is tightly pressed with the cover plate (3).