CN219591318U

CN219591318U - Vacuum circuit breaker for inflatable cabinet

Info

Publication number: CN219591318U
Application number: CN202320542025.9U
Authority: CN
Inventors: 金叶志; 张伟明; 陈奇; 钱帅; 谢宁峰
Original assignee: Ningbo Tianan Jinghua Power Technology Co ltd
Current assignee: Ningbo Tianan Jinghua Power Technology Co ltd
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-08-25
Anticipated expiration: 2033-03-13

Abstract

The utility model relates to the field of electric power protection devices, and discloses a vacuum circuit breaker for an inflatable cabinet, which comprises a pole column assembly and a transmission mechanism connected with the pole column assembly through a connecting rod, wherein the connecting rod is sleeved with a corrugated pipe assembly, the corrugated pipe assembly is arranged on a sealing plate in a penetrating mode, one end, far away from the pole column assembly, of the corrugated pipe assembly is provided with a chassis which is in butt joint with the sealing plate, one side, close to the sealing plate, of the chassis is sunken with an annular containing groove which can contain a sealing ring, a double locking mechanism for improving the sealing performance of the sealing ring is arranged between the chassis and the sealing plate, the double locking mechanism comprises a first locking part which is used for fixing the chassis below the sealing plate and a second locking part which is arranged on the chassis and can gradually press and lock the sealing ring towards the sealing plate, and the sealing mechanism can carry out secondary locking on the sealing ring so as to prolong the service life of the sealing mechanism.

Description

Vacuum circuit breaker for inflatable cabinet

Technical Field

The utility model relates to the field of power protection devices, in particular to a vacuum circuit breaker for an inflatable cabinet.

Background

A vacuum circuit breaker is a common power protection device capable of protecting load equipment and lines from a large current generated due to a short circuit, a ground fault, etc. which may occur in a circuit, and when an accident circuit occurs, the circuit breaker opens the circuit by automatically performing a breaking operation, and an arc extinguishing medium thereof and an insulation medium of a contact gap after an arc extinction are both named as high vacuum.

The Chinese patent with the bulletin number of CN111312554A discloses a vacuum circuit breaker, which comprises a pole column assembly, wherein an insulating pull rod connected with a moving contact in a transmission manner is arranged in the pole column assembly, a sealing cavity is arranged between the pole column assembly and the insulating pull rod, one end of the insulating pull rod is provided with an operating mechanism connected with the insulating pull rod through a connecting rod, a sealing flange for sealing an opening is arranged on the pole column assembly, a corrugated pipe assembly is sleeved on the outer wall of the connecting rod, and one end of the corrugated pipe assembly is fixed with the sealing flange.

According to the above structural description, the vacuum circuit breaker seals the space between the pole assembly and the corrugated pipe assembly through the sealing flange, so that gas in the space where the transmission mechanism is arranged below the corrugated pipe assembly can not enter the pole assembly, the existing sealing flange is matched in a mode of screwing a sealing ring and a bolt, the bolt is screwed up in a depth limit, the sealing ring can deform or crack after reaching the depth limit to reduce the sealing effect, and the sealing effect is ensured by replacing the sealing ring.

Disclosure of Invention

Aiming at the defect that the sealing effect is reduced after a long time use because a sealing ring in the existing vacuum circuit breaker cannot be fastened again after a bolt is screwed, the utility model aims to provide the vacuum circuit breaker for the gas-filled cabinet, which can lock the sealing ring for the second time so as to prolong the service life of a sealing mechanism.

In order to solve the technical problems, the utility model is solved by the following technical scheme:

the utility model provides a aerify vacuum circuit breaker for cabinet, including utmost point post subassembly and the drive mechanism who is connected with utmost point post subassembly through the connecting rod, the cover is equipped with the bellows subassembly on the connecting rod, the bellows subassembly wears to locate on a closing plate, the bellows subassembly keep away from the one end of utmost point post subassembly be provided with closing plate butt's chassis, the chassis is close to one side of closing plate sunken to have annular holding tank that can hold the sealing washer, be provided with the dual locking mechanism who improves sealing washer sealing performance between chassis and closing plate, dual locking mechanism is including fixing the chassis at the first locking portion of closing plate below and the second locking portion that can extrude the locking gradually with the sealing washer to the closing plate that sets up on the chassis.

By adopting the scheme, the two groups of locking parts are matched with each other, the first locking part can carry out basic locking on the sealing ring, so that the brand-new sealing ring can be normally used, deformation or rupture can possibly occur after the sealing ring is used for a long time, the sealing ring can be locked for the second time through the second locking part, the sealing ring is further attached to the tight sealing plate, a certain sealing effect is reserved, and the service time of the sealing mechanism is effectively prolonged.

Preferably, the first locking part comprises a first bolt, a first mounting hole, a first threaded hole and an operating part, wherein the first mounting hole is formed in the chassis and used for allowing the first bolt to pass through, the first threaded hole is formed in the sealing plate and is matched with the first bolt, and the operating part is formed in the first bolt and can drive the first bolt to rotate.

By adopting the scheme, the setting mode of bolt tightening is simple, and the self-locking mechanism has a certain self-locking function, so that the chassis cannot rebound after pressing the sealing ring.

Preferably, the operation portion is a cam mechanism including a cam eccentrically rotated at an end of the first bolt remote from the chassis and a first handle for urging the cam to rotate.

By adopting the scheme, after the first bolt is screwed down, the first handle is rotated, so that one side with larger cam eccentricity is propped against the bottom plate, the pressing force between the chassis and the sealing plate is increased, the sealing ring is further pressed, the labor-saving effect can be realized by the first handle, and the first locking part is convenient to operate.

Preferably, the first locking portions are provided with at least two groups at regular intervals around the chassis circumference.

By adopting the scheme, when two or more groups of first locking parts are arranged on the chassis, the locking between the chassis and the sealing plate can be ensured.

Preferably, the second locking part comprises a moving part which is arranged in the accommodating groove and can be close to or far from the sealing ring, and a driving part which drives the moving part to be close to the sealing ring and to squeeze the moving part towards the sealing plate.

By adopting the scheme, after the sealing ring is locked by the first locking part, the driving part and the moving part drive the sealing ring to be continuously close to the sealing plate, so that the secondary locking after locking is realized, even if the sealing ring is deformed or broken, the sealing ring can still be abutted against the sealing plate to keep the sealing effect after being compressed again, and the service life of the sealing mechanism is effectively prolonged.

Preferably, the moving part comprises a top plate which is arranged in the accommodating groove and has the same radian as the accommodating groove, the top plate is in an annular shape which can be contacted with all sealing rings after being combined, and two side walls of the top plate are in clearance fit with two side walls of the accommodating groove.

By adopting the scheme, the annular top plates are formed, so that the top plates are fully contacted with the sealing ring, the pressing force is more uniform, the gap between the top plates and the accommodating groove is reduced as much as possible, the movement of the top plates can be reduced when the top plates slide, and the force acting on the sealing ring is more uniform.

Preferably, the second locking portions are provided with at least two groups at regular intervals around the chassis circumference.

By adopting the scheme, the more the number of groups of the second locking parts is, the more uniform the pressure is applied when the sealing ring is compressed for the second time.

Preferably, the driving part comprises second threaded holes circumferentially arranged at intervals at the bottom of the accommodating groove, second bolts are matched with the second threaded holes, one ends of the second bolts close to the top plate are rotationally connected with the top plate, one ends of the second bolts far away from the top plate extend to the outside of the chassis, and the end parts of the second bolts are provided with second handles which are convenient for rotation.

By adopting the scheme, the second bolt is rotated to drive the top plate to slide along the accommodating groove, when the top plate moves towards the sealing plate, the top plate props against the sealing ring to carry out secondary locking, and the second handle arranged on the second bolt can be used for screwing the bolt without tools, so that the operation is more labor-saving and convenient.

The utility model has the remarkable technical effects due to the adoption of the technical scheme:

1. the two groups of locking parts are matched with each other, the first locking part can be used for basic locking of the sealing ring, so that the brand-new sealing ring can be normally used, deformation or breakage can possibly occur after the sealing ring is used for a long time, and the sealing ring can be locked for the second time through the second locking part, so that the sealing ring is further attached to the tight sealing plate, a certain sealing effect is reserved, and the service time of the sealing mechanism is effectively prolonged.

2. The first locking part and the second locking part are respectively provided with an operating piece which is convenient to operate and saves labor, so that the sealing mechanism of the vacuum circuit breaker is more convenient and saves labor when being installed or checked and locked.

Drawings

Fig. 1 is an isometric view of a vacuum interrupter for a gas-filled tank according to the present embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is an isometric view of the dual locking mechanism of the present embodiment as assembled with a bellows assembly;

fig. 4 is a front view of a vacuum interrupter for air tanks of the present embodiment;

FIG. 5 is a cross-sectional view of B-B in FIG. 4;

FIG. 6 is an enlarged view of a portion of C in FIG. 5;

fig. 7 is an isometric view of the combination of the mover and the driver in this embodiment.

The names of the parts indicated by the numerical reference numerals in the above drawings are as follows: 1. a pole assembly; 101. a pole insulating sleeve; 102. an insulating pull rod; 103. a connecting rod; 2. a transmission mechanism; 3. a bellows assembly; 301. a chassis; 302. a seal ring; 303. a receiving groove; 4. a sealing plate; 5. a first locking part; 501. a first threaded hole; 502. a first mounting hole; 503. a first bolt; 504. a cam; 505. a first handle; 6. a driving section; 601. a second threaded hole; 602. a second bolt; 603. a second handle; 7. and a top plate.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

Examples

The utility model provides a vacuum circuit breaker for cabinet of aerifing, according to fig. 1, fig. 4 or fig. 5 show, including utmost point post subassembly 1, utmost point post subassembly 1 includes utmost point post insulation cover 101 and sets up the insulating pull rod 102 in utmost point post insulation cover 101, insulating pull rod 102 passes through connecting rod 103 and is connected with drive mechanism 2, the cover is equipped with bellows subassembly 3 on the connecting rod 103, bellows subassembly 3 wears to locate on a closing plate 4, bellows subassembly 3 is provided with the chassis 301 with closing plate 4 butt apart from the one end of utmost point post subassembly 1, chassis 301 is close to the holding groove 303 that annular can hold sealing washer 302 in the one side of closing plate 4 is sunken, when chassis 301 is fixed with closing plate 4, sealing washer 302 is used for sealing the clearance between bellows subassembly 3 and the closing plate 4, above is prior art.

The improvement of the present embodiment is that a double locking mechanism is provided between the chassis 301 and the sealing plate 4, the double locking mechanism including a first locking portion 5 for fixing the chassis 301 below the sealing plate 4 and a second locking portion provided on the chassis 301 for gradually pressing and locking the seal ring 302 toward the sealing plate 4.

According to the embodiment shown in fig. 2, the first locking portions 5 are provided with four groups, the first locking portions 5 comprise first bolts 503, the chassis 301 is provided with first mounting holes 502, the sealing plate 4 is provided with first threaded holes 501 matched with the first bolts 503, the first bolts 503 pass through the first mounting holes 502 and then are locked with the first threaded holes 501, the first bolts 503 are provided with operation parts capable of driving the bolts to rotate, according to the embodiment shown in fig. 3, the operation parts are cam mechanisms, the cam mechanisms comprise cams 504 eccentrically rotating at one ends of the first bolts 503 far away from the chassis 301, the cams 504 are provided with first handles 505 for driving the cams 504 to rotate, when the cams 504 rotate to one side with larger eccentricity and are matched with the chassis 301, the chassis 301 can be further driven to press the sealing rings 302, the cams 504 are not easy to loosen after being pressed on the chassis, the first bolts 503 can be prevented from being separated, and the arrangement of the first handles 505 enables the bolts to be more labor-saving when screwing or rotating the cams 504.

The second locking part comprises a moving part which is arranged in the accommodating groove 303 and can be close to or far away from the sealing ring 302, according to the illustration of fig. 6 or 7, the moving part comprises top plates 7 which are arranged in the accommodating groove 303 and have the same radian with the accommodating groove 303, the top plates 7 are combined to form an annular shape which can be contacted with all the sealing rings 302, two side walls of the top plates 7 are in clearance fit with two side walls of the accommodating groove 303, when the top plates 7 slide, the movement can be reduced, the force acting on the sealing rings 302 is more uniform, and the annular top plates 7 are combined to ensure the locking force of secondary locking, so that each top plate 7 can be fully contacted with the sealing rings 302.

The movement of the top plate 7 is controlled by a driving part 6, according to the illustration of fig. 6 or 7, the driving part 6 comprises second threaded holes 601 circumferentially distributed at intervals at the bottom of the accommodating groove 303, second bolts 602 are arranged on the second threaded holes 601 in a matched mode, one end of each second bolt 602 close to the top plate 7 is rotationally connected with the top plate 7, one end of each second bolt 602 far away from the top plate 7 extends to the outside of the chassis 301, the end of each second bolt 602 is provided with a second handle 603 which is convenient for the rotation of the corresponding second handle, the threaded connection has a self-locking effect, the reverse elastic force of the sealing ring 302 enables threads between the second bolts 602 and the second threaded holes 601 to be elastically abutted, the second bolts 602 are not easy to separate, and the second bolts 602 can be directly screwed without tools, so that the operation is more labor-saving and convenient.

When the top plate 7 is close to the sealing plate 4, the sealing ring 302 is extruded again, and when the sealing ring 302 is deformed or broken, the sealing performance is reduced, and the sealing ring 302 is tightly attached to the sealing plate 4 through the second locking part again pressing the sealing ring 302, so that a certain sealing effect can be reserved, and the service life of the sealing mechanism is effectively prolonged.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a aerify vacuum circuit breaker for cabinet, includes utmost point post subassembly (1) and drive mechanism (2) that are connected with utmost point post subassembly (1) through connecting rod (103), the cover is equipped with bellows subassembly (3) on connecting rod (103), bellows subassembly (3) are worn to locate on closing plate (4), bellows subassembly (3) are kept away from the one end of utmost point post subassembly (1) and are provided with chassis (301) with closing plate (4) butt, chassis (301) are close to one side of closing plate (4) sunken have annular holding groove (303) that can hold sealing washer (302), its characterized in that: the double locking mechanism for improving the sealing performance of the sealing ring (302) is arranged between the chassis (301) and the sealing plate (4), and comprises a first locking part (5) for fixing the chassis (301) below the sealing plate (4) and a second locking part which is arranged on the chassis (301) and can gradually press and lock the sealing ring (302) towards the sealing plate (4).

2. The vacuum interrupter for an air tank according to claim 1, wherein: the first locking part (5) comprises a first bolt (503), a first mounting hole (502) which is arranged on the chassis (301) and used for the first bolt (503) to pass through, a first threaded hole (501) which is arranged on the sealing plate (4) and is matched with the first bolt (503), and an operating part which is arranged on the first bolt (503) and can drive the first bolt (503) to rotate.

3. The vacuum interrupter for an air tank according to claim 2, wherein: the operation part is a cam mechanism, and the cam mechanism comprises a cam (504) eccentrically rotating at one end of a first bolt (503) far away from the chassis (301) and a first handle (505) driving the cam (504) to rotate.

4. The vacuum interrupter for an air tank according to claim 2, wherein: at least two groups of first locking parts (5) are uniformly arranged around the circumference of the chassis (301) at intervals.

5. The vacuum interrupter for an air tank according to claim 1, wherein: the second locking part comprises a moving part which is arranged in the accommodating groove (303) and can be close to or far away from the sealing ring (302) and a driving part (6) which drives the moving part to be close to the sealing ring (302) and extrude the moving part towards the sealing plate (4).

6. The vacuum interrupter for an air tank of claim 5, wherein: the movable part comprises a top plate (7) which is arranged in the accommodating groove (303) and has the same radian with the accommodating groove (303), the top plate (7) is in an annular shape which can be contacted with all sealing rings (302) after being combined, and two side walls of the top plate (7) are in clearance fit with two side walls of the accommodating groove (303).

7. The vacuum interrupter for an air tank of claim 6, wherein: at least two groups of second locking parts are uniformly arranged around the circumference of the chassis (301) at intervals.

8. The vacuum interrupter for an air tank of claim 6, wherein: the driving part (6) comprises second threaded holes (601) circumferentially arranged at intervals at the bottom of the accommodating groove (303), second bolts (602) are arranged on the second threaded holes (601) in a matched mode, one ends of the second bolts (602) close to the top plate (7) are rotationally connected with the top plate (7), one ends of the second bolts (602) far away from the top plate (7) extend to the outside of the chassis (301), and second handles (603) convenient for the rotation of the second handles are arranged at the ends of the second bolts.