WO2023077325A1 - Integrated high-voltage alternating-current vacuum circuit breaker - Google Patents

Abstract

The present invention relates to the technical field of high-voltage alternating-current circuit breakers, and, in particular, to an integrated high-voltage alternating-current vacuum circuit breaker. The integrated high-voltage alternating-current vacuum circuit breaker comprises a fully enclosed multi-station spring module and a solid-insulation-embedded pole, wherein at least one solid-insulation-embedded pole is mounted on the fully enclosed multi-station spring module, the solid-insulation-embedded pole is formed by casting by means of a solid insulation technique, and the surface of the solid-insulation-embedded pole is sprayed with a semi-conductive shielding layer. The solid-insulation-embedded pole formed by casting using the solid insulation technique can realize the integrated layout of structural components, such as a vacuum arc-extinguishing tube, in the solid-insulation-embedded pole, thereby effectively optimising space. Moreover, the external semi-conductive shielding layer effectively reduces the risk of breakdown of the solid-insulation-embedded pole and thus protects elements in the solid-insulation-embedded pole. The modular combination of the fully enclosed multi-station spring module and the solid-insulation-embedded pole can optimise the overall structural layout of the circuit breaker, greatly reduce scattered parts, and also greatly reduce the size of the 72.5 kV high-voltage vacuum circuit breaker.

Description

An integrated high voltage AC vacuum circuit breaker technical field

The invention relates to the technical field of high-voltage AC circuit breakers, in particular to an integrated small 72.5kv indoor high-voltage AC vacuum circuit breaker

Background technique

With the increase of wind turbine capacity, especially the rapid development of offshore wind farms, in order to reduce transmission loss, the system voltage has been greatly increased, and the voltage level of wind turbine transformers and C-GIS equipment has also been raised from 36kV to 72.5kV. Demand, it is necessary to develop a new type of integrated and miniaturized high-voltage AC vacuum circuit breaker.

Contents of the invention

The purpose of the present invention is to provide an integrated small 72.5kv indoor high-voltage AC vacuum circuit breaker to solve the problems raised in the above-mentioned background technology. In order to achieve the above object, the present invention provides the following technical solution: an integrated small 72.5kv indoor high-voltage AC vacuum circuit breaker, including a fully enclosed multi-station spring module and a solid-sealed pole, the fully enclosed multi-station At least one solid-sealed pole is installed on the spring module, and the solid-sealed pole is cast by solid insulation technology, and the surface of the solid-sealed pole is sprayed with a semi-conductive shielding layer.

Preferably, the bottom of the solid-sealed pole is open, and the solid-sealed pole is provided with an outlet bushing and an incoming bushing, and a vacuum interrupter is arranged inside the solid-sealed pole, and the vacuum The center of the top end of the arc extinguishing tube is extended downwards with a static contact rod connected to the outlet bushing, and the center of the inner bottom of the vacuum interrupter is extended upward with a moving contact rod corresponding to the static contact rod. One side of the moving contact rod is softly connected to the wire inlet sleeve, and the bottom end of the moving contact rod passing through the vacuum interrupter is connected with an insulating pull rod.

Preferably, the fully enclosed multi-position spring module is provided with a multi-position action mechanism, and the multi-position action mechanism is connected with at least one set of spring linkage mechanism, and the spring linkage mechanism includes a main crank arm, an arc crank Arm, contact pressure spring one, single-stage transmission crank arm and contact pressure spring two, one end of the main crank arm is connected with the multi-position action mechanism, the other end is connected with the arc crank arm, and the arc The crank arm is connected to the contact pressure spring one, the contact pressure spring one is connected to one end of the single-stage transmission crank arm, and the other end of the single-stage transmission crank arm is connected to the contact pressure spring two, The second contact pressure spring passes through the fully enclosed multi-position spring module to connect with the insulating pull rod.

Preferably, a conductive clip is sheathed at the joint between the moving contact rod and the insulating pull rod, the wire inlet sleeve is softly connected to the conductive clip through a reed, and a corrugated sleeve is provided on the sliding sleeve of the moving contact rod. Tube.

Preferably, a grounding electrode is provided on the vacuum interrupter, a grounding sleeve is correspondingly provided on the solid-sealed pole tube, and the grounding electrode is grounded through the grounding sleeve.

Preferably, an operation panel is provided outside the fully enclosed multi-position spring module, and the operation panel is connected to the multi-position mechanism.

Preferably, three solid-sealed poles can be installed on the fully enclosed multi-position spring module.

Preferably, the fully enclosed multi-position spring module is provided with a three-position action mechanism, and the three-position action mechanism is connected with three sets of spring linkage mechanisms.

Preferably, a buffer layer is provided between the vacuum interrupter and the inner side of the solid-sealed pole.

Preferably, a fixed post is provided on one side of the solid-sealed pole, and the fixed post can be connected to the fully enclosed multi-position spring module.

Compared with prior art, the beneficial effect of the present invention:

In the present invention, the solid-sealed pole is casted by solid insulation technology, and the surface of the solid-sealed pole is sprayed with a semi-conductive shielding layer, and the solid-sealed pole cast by solid insulation technology can seal structural components such as vacuum interrupters The integrated layout is inside the sealed pole, which effectively optimizes the space. At the same time, the semi-conductive shielding layer on the outside effectively reduces the risk of breakdown of the sealed pole and provides protection for the components inside the sealed pole. Fully enclosed multi-position spring The modular combination of modules and solid-sealed poles can optimize the overall structural layout of the circuit breaker, greatly reduce scattered parts, greatly reduce the volume of 72.5kV high-voltage vacuum circuit breakers, and the difficulty of maintenance, so it can be applied to 72.5kV metal In the armored high-voltage switchgear, it is a high-voltage AC vacuum circuit breaker that is installed and maintained in the limited space of the wind turbine tower of the offshore wind farm and operates reliably.

Description of drawings

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

Fig. 2 is the front schematic diagram of overall structure of the present invention;

Fig. 3 is a schematic diagram of the structure of the solid-sealed pole in the present invention;

Fig. 4 is a schematic diagram of the structure of the vacuum interrupter in the present invention.

In the figure: 1. Vacuum interrupter; 2. Static contact rod; 3. Moving contact rod; 4. Outlet bushing; 5. Incoming bushing; 6. Reed; 7. Insulation rod; 8. Operation panel; 9. Ground electrode; 10. Ground bushing; 11. Multi-position mechanism; 12. Main arm; 13. Arc arm; 14. Contact pressure spring one; 15. Contact pressure spring two; 16. Single 17. Conductive clip; 18. Fixed pillar; 19. Buffer layer; 20. Casting layer; 21. Semi-conductive shielding layer; 22. Fully enclosed multi-position spring module; 23. Bellows; 24. Solid-sealed pole.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to Figures 1 to 4, the present invention provides a technical solution: an integrated small 72.5kv indoor high-voltage AC vacuum circuit breaker, including a fully enclosed multi-position spring module 22 and a solid-sealed pole 24, which features In that: at least one solid-sealed pole 24 is installed on the fully enclosed multi-position spring module 22, the solid-sealed pole 24 is cast by solid insulation technology, and the surface of the solid-sealed pole 24 is sprayed with half Conductive shielding layer 21.

In this embodiment: the bottom of the solid-sealed pole 24 is open, and the solid-sealed pole 24 is provided with an outgoing line sleeve 4 and an incoming line sleeve 5, and the solid-sealed pole 24 is provided with a vacuum Arc extinguishing tube 1, a static contact rod 2 extending downward from the center of the inner top of the vacuum arc extinguishing tube 1, the static contact rod 2 is connected to the outlet bushing 4, and the inner bottom of the vacuum arc extinguishing tube 1 Extending upward from the center is a moving contact rod 3 corresponding to the static contact rod 2, one side of the moving contact rod 3 is softly connected to the wire inlet sleeve 5, and the moving contact rod 3 passes through the vacuum arc extinguishing The bottom end of the pipe 1 is connected with an insulating pull rod 7 .

In this embodiment: the fully enclosed multi-position spring module 22 is provided with a multi-position action mechanism, and the multi-position action mechanism is connected with at least one set of spring linkage mechanism, and the spring linkage mechanism includes the main crank arm 12 , arc-shaped crank arm 13, contact pressure spring one 14, single-stage transmission crank arm 16 and contact pressure spring two 15, one end of the main crank arm 12 is connected with the multi-station action mechanism, and the other end is connected with the The arc-shaped crank arm 13 is connected, and the arc-shaped crank arm 13 is connected with the contact pressure spring one 14, and the contact pressure spring one 14 is connected with one end of the single-stage transmission crank arm 16, and the single-stage transmission The other end of the crank arm 16 is connected to the second contact pressure spring 15 , and the second contact pressure spring 15 passes through the fully enclosed multi-position spring module 22 to connect with the insulating pull rod 7 .

In this embodiment: the connection between the movable contact rod 3 and the insulating pull rod 7 is covered with a conductive clip 17, the wire inlet sleeve 5 is softly connected to the conductive clip 17 through the reed 6, and the movable A bellows 2323 is provided on the sliding sleeve of the contact rod 3 .

In this embodiment: the vacuum interrupter 1 is provided with a grounding electrode 9 , and the solid-sealed electrode tube is correspondingly provided with a grounding sleeve 10 , and the grounding electrode 9 is grounded through the grounding sleeve 10 .

In this embodiment: the fully enclosed multi-position spring module 22 is provided with an operation panel 8 outside, and the operation panel 8 is connected to the multi-position mechanism 11 .

In this embodiment: the fully enclosed multi-position spring module 22 can be installed with three solid-sealed poles 24 .

In this embodiment: the fully enclosed multi-position spring module 22 is provided with a three-position action mechanism, and the three-position action mechanism is connected with three sets of spring linkage mechanisms.

In this embodiment: a buffer layer 19 is provided between the vacuum interrupter 1 and the inner side of the solid-sealed pole 24 .

In this embodiment: one side of the solid-sealed pole 24 is provided with a fixed support 18, and the fixed support 18 can be connected with the fully enclosed multi-position spring module 22.

In the present invention, the solid-sealed pole 24 is cast by solid insulation technology, and the surface of the solid-sealed pole 24 is sprayed with a semi-conductive shielding layer 21, and the solid-sealed pole 24 cast by the solid insulation technology can extinguish the vacuum arc. The structural components such as the tube 1 are integrated and arranged in the embedded pole 24, which effectively optimizes the space. At the same time, the semi-conductive shielding layer 21 on the outside effectively reduces the risk of breakdown of the embedded pole 24 and provides Protection, the modular combination of the fully enclosed multi-position spring module 22 and the solid-sealed pole 24 can optimize the overall structural layout of the circuit breaker, greatly reduce scattered parts, and greatly reduce the volume of the 72.5kV high-voltage vacuum circuit breaker. And the difficulty of maintenance, so it can be applied in the 72.5kV metal armored high-voltage switchgear, installed and maintained in the limited space of the fan tower of the offshore wind farm, and is a high-voltage AC vacuum circuit breaker that operates reliably.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Claims (10)

1. An integrated high-voltage AC vacuum circuit breaker, including a fully enclosed multi-position spring module and a solid-sealed pole, characterized in that: at least one solid-sealed pole is installed on the fully-enclosed multi-station spring module, and the The solid-sealed pole is cast by solid insulation technology, and the surface of the solid-sealed pole is sprayed with a semi-conductive shielding layer.
2. The integrated high-voltage AC vacuum circuit breaker according to claim 1, characterized in that: the bottom of the solid-sealed pole is open, and the solid-sealed pole is provided with an outgoing line bushing and an incoming line bushing, so A vacuum interrupter is installed inside the solid-sealed pole, and a static contact rod is extended downward from the center of the top of the vacuum interrupter. The static contact rod is connected to the outlet bushing, and the inner bottom of the vacuum interrupter Extending upward from the center of the end is a moving contact rod corresponding to the static contact rod. One side of the moving contact rod is softly connected to the inlet bushing, and the moving contact rod passes through the bottom end of the vacuum interrupter to connect There are insulating rods.
3. The integrated high-voltage AC vacuum circuit breaker according to claim 2, characterized in that: the fully enclosed multi-position spring module is provided with a multi-position action mechanism, and the multi-position action mechanism is connected with at least one set of springs linkage mechanism, the spring linkage mechanism includes a main crank arm, an arc-shaped crank arm, a contact pressure spring one, a single-stage transmission crank arm and a contact pressure spring two, and one end of the main crank arm is connected to the multi-position action mechanism connected, the other end is connected with the arc-shaped crank arm, the arc-shaped crank arm is connected with the contact pressure spring, the contact pressure spring is connected with one end of the single-stage transmission crank arm, and the single-stage transmission crank arm is connected. The other end of the crank arm of the stage transmission is connected to the contact pressure spring 2, and the contact pressure spring 2 passes through the fully enclosed multi-position spring module to connect with the insulating pull rod.
4. According to claim 2 or 3, the integrated high-voltage AC vacuum circuit breaker is characterized in that: a conductive clip is sheathed at the joint between the moving contact rod and the insulating pull rod, and the wire inlet bushing is connected to the The conductive clip is softly connected, and the sliding sleeve on the moving contact rod is provided with a bellows.
5. The integrated high-voltage AC vacuum circuit breaker according to claim 1, characterized in that: the vacuum interrupter is provided with a grounding electrode, and the solid-sealed pole tube is correspondingly provided with a grounding bushing, and the grounding electrode passes through The ground bushing is grounded.
6. The integrated high-voltage AC vacuum circuit breaker according to claim 3, characterized in that: an operation panel is arranged outside the fully enclosed multi-position spring module, and the operation panel is connected to the multi-position mechanism.
7. The integrated high-voltage AC vacuum circuit breaker according to claim 3, wherein three solid-sealed poles can be installed on the fully enclosed multi-position spring module.
8. The integrated high-voltage AC vacuum circuit breaker according to claim 7, characterized in that: the fully enclosed multi-position spring module is provided with a three-position action mechanism, and the three-position action mechanism is connected with three sets of spring linkage mechanisms .
9. The integrated high-voltage AC vacuum circuit breaker according to claim 3, wherein a buffer layer is provided between the vacuum interrupter and the inner side of the solid-sealed pole.
10. The integrated high-voltage AC vacuum circuit breaker according to claim 3, characterized in that: one side of the solid-sealed pole is provided with a fixed support, and the fixed support can be connected to the fully enclosed multi-position spring module.

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