CN114360959A - Vacuum insulation transmission rod and miniaturized vacuum circuit breaker - Google Patents

Abstract

The invention discloses a vacuum insulation transmission rod and a miniaturized vacuum circuit breaker. The vacuum insulation transmission rod comprises a casing, a corrugated pipe and an insulation rod; the insulation rod passes through the casing, and its two ends pass through the corrugated pipe respectively. The bellows and the casing form a closed vacuum environment and are connected with the casing in a sealed manner, and together form the vacuum insulated transmission rod. The miniaturized vacuum circuit breaker includes a base mounting plate, an insulating shielding member is fixed on the upper side of the base mounting plate, and a supporting action mechanism is fixed on the lower side. The insulating shielding member is sequentially provided with a vacuum interrupter and an intermediate connection from top to bottom. The metal sleeve and the above-mentioned vacuum insulation transmission rod, the top of the insulation shield is provided with a static end high voltage interface, and the side is provided with a moving end high voltage interface and an electrical connection contact finger; the insulation rod B end of the vacuum insulation transmission rod is connected with the supporting action mechanism, The A terminal is connected with the middle connecting metal sleeve. The structure is simple and ingenious, and the ideas are novel, which can greatly reduce the electrical gap and space size between the high-voltage circuit and the ground; it can be directly applied to high-altitude environments, and solve the need for high-voltage circuit-to-ground electrical gaps when solid insulation integration technology is used in high-altitude applications. Corrected technical bottlenecks and deficiencies.

Description

A vacuum insulated transmission rod and miniaturized vacuum circuit breaker

technical field

The invention relates to a vacuum insulation and high-voltage switch technology, in particular to a vacuum insulation transmission rod and a miniaturized vacuum circuit breaker.

Background technique

The vacuum circuit breaker is one of the key components of the high-voltage system on the grid side of the rolling stock, which plays the function of connecting and cutting off the main circuit of the high-voltage system, and is installed on the roof, inside or under the rolling stock of the rolling stock.

The vacuum circuit breaker is mainly composed of insulator, vacuum interrupter, transmission rod and operating mechanism. In the current mainstream products at home and abroad, the transmission rod is generally an air-insulated structure with an umbrella skirt, which is installed inside the insulator to act as a vacuum circuit breaker. The effect of the high-voltage circuit on the ground insulation and the transmission of the operating mechanism needs to ensure the mechanical strength, creepage distance and electrical clearance of the transmission rod at the same time, which leads to the large space size of the transmission rod and the vacuum circuit breaker, and it needs to be used when the altitude is above 1500m. Air insulation corrections were made, further resulting in an increase in the size of the space.

With the technical improvement and rapid development of rolling stock, especially the development of higher-speed EMUs, the technical features and demands for miniaturization, drag reduction and noise reduction of high-voltage switches such as vacuum circuit breakers are urgent. In addition, during the application of the solid insulation integration technology for grid-side high-voltage electrical appliances in high-altitude areas, the air-to-ground air insulation of the main circuit of high-voltage switches such as vacuum circuit breakers still needs to be corrected for altitude, resulting in limited versatility of the product. The application of insulation integration technology has prominent and obvious technical bottlenecks and constraints.

Based on the above-mentioned industry development needs and current technology status, it is of great significance and promotion value to develop and develop a vacuum insulated transmission rod and a miniaturized vacuum circuit breaker.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vacuum insulated transmission rod and a miniaturized vacuum circuit breaker to solve the above technical problems existing in the prior art.

The purpose of this invention is to realize through the following technical solutions:

The vacuum insulated transmission rod of the present invention comprises a casing, a bellows and an insulating rod;

The insulating rod passes through the casing, and its two ends are respectively sealed and connected to the casing through the bellows. The bellows and the casing form a closed vacuum environment and together constitute the vacuum insulation transmission. rod.

The miniaturized vacuum circuit breaker of the present invention includes a base mounting plate, an insulating shielding member is fixed on the upper side of the base mounting plate, and a matching action mechanism is fixed on the lower side, and the insulating shielding member is arranged in sequence from top to bottom. There is a vacuum interrupter, a middle connecting metal sleeve and the above-mentioned vacuum insulating transmission rod, the top of the insulating shield is provided with a static end high voltage interface, and the side is provided with a moving end high voltage interface and an electrical connection contact finger;

The insulating rod B end of the vacuum insulated transmission rod is connected with the matching action mechanism, and the A end is connected with the intermediate connecting metal sleeve.

It can be seen from the above technical solutions provided by the present invention that the vacuum insulated transmission rod and the miniaturized vacuum circuit breaker provided by the embodiments of the present invention have simple and ingenious structures, novel ideas, and can greatly reduce the electrical gap between the high-voltage circuit and the ground. Space size, miniaturization, outstanding technical features and obvious advantages; can be directly applied to high altitude environment without altitude correction, good versatility, vacuum environment is not affected by factors such as air pollution and condensed water, high insulation safety and reliability , the market potential is large; it can solve the technical bottleneck and deficiencies of the high-voltage circuit-to-ground clearance correction of the solid insulation integration technology in high-altitude applications, with broad application prospects and outstanding economic and social benefits.

Description of drawings

FIG. 1 is a schematic structural principle diagram of a miniaturized vacuum circuit breaker provided by an embodiment of the present invention;

2 is a schematic diagram of the structural principle of a vacuum insulated transmission rod provided by an embodiment of the present invention;

In the picture:

1. Static end high voltage interface 2. Vacuum interrupter 3. Insulation shield 4. Intermediate connection metal sleeve 5. Vacuum insulated transmission rod 6. Supporting action mechanism 7. Base mounting plate 8. Moving end high voltage interface 9. Electrical connection Contact finger 10. Housing 11. Bellows 12. Insulation rod

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, which do not It does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

First a description of terms that may be used in this article:

The term "and/or" means that either or both can be achieved, eg, X and/or Y means both the case of "X" or "Y" and the three cases of "X and Y" .

The terms "comprising", "comprising", "containing", "having" or other descriptions with similar meanings should be construed as non-exclusive inclusions. For example: including certain technical characteristic elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.), should be construed to include not only a certain technical feature element explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

The term "consisting of" means to exclude any element of technical characteristics not expressly listed. If the term is used in a claim, the term will make the claim closed so that it does not contain technical feature elements other than those expressly listed, except for conventional impurities with which they are associated. If the term appears in only one clause of a claim, it is limited only to the elements expressly recited in that clause, and elements recited in other clauses are not excluded from the claim as a whole.

Unless otherwise expressly specified or limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this document can be understood according to specific situations.

Terms "center", "longitudinal", "lateral", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise is based on the orientation or positional relationship shown in the drawings. , is only for convenience and simplification of description, rather than expressing or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this text.

Contents that are not described in detail in the embodiments of the present invention belong to the prior art known to those skilled in the art. If the specific conditions are not indicated in the examples of the present invention, it is carried out according to the conventional conditions in the art or the conditions suggested by the manufacturer. The reagents or instruments used in the examples of the present invention without the manufacturer's indication are conventional products that can be purchased from the market.

The vacuum insulated transmission rod of the present invention comprises a casing, a bellows and an insulating rod;

The insulating rod passes through the casing, and its two ends are respectively sealed and connected to the casing through the bellows. The bellows and the casing form a closed vacuum environment and together constitute the vacuum insulation transmission. rod.

The bellows is a two-way working position, which can be stretched back to position and can be compressed back to position. The insulating rod is a composite body of metal and insulating material. Bellows welded seal.

The miniaturized vacuum circuit breaker of the present invention includes a base mounting plate, an insulating shielding member is fixed on the upper side of the base mounting plate, and a matching action mechanism is fixed on the lower side, and the insulating shielding member is arranged in sequence from top to bottom. There is a vacuum interrupter, a middle connecting metal sleeve and the above-mentioned vacuum insulating transmission rod, the top of the insulating shield is provided with a static end high voltage interface, and the side is provided with a moving end high voltage interface and an electrical connection contact finger;

The insulating rod B end of the vacuum insulated transmission rod is connected with the matching action mechanism, and the A end is connected with the intermediate connecting metal sleeve.

The vacuum insulated transmission rod, the vacuum interrupter and the insulating shield are cast into an integral structure, the static contact of the vacuum interrupter is connected to the high-voltage interface of the static end, and the dynamic contact of the vacuum interrupter is The head is connected with the intermediate connecting metal sleeve, and the intermediate connecting metal sleeve and the high-voltage interface of the moving end are slidably connected by the electrical connection contact fingers.

Direct pressure casting and/or silicone rubber potting are used between the vacuum interrupter, the vacuum insulated transmission rod and the insulating shield, and the outer surface structure of the insulating shield includes a ground shield layer and an insulating shed.

The static-end high-voltage interface and the dynamic-end high-voltage interface include bare metal, an insulating sleeve and/or an inner cone socket.

In the present invention, the structural forms of the static-end high-voltage interface, the dynamic-end high-voltage interface, and the insulating shielding member are determined according to system requirements, and the supporting action mechanism can be in various forms such as pneumatic and electric;

The working stroke of the bellows is determined according to the opening distance and overtravel displacement of the vacuum circuit breaker;

The supporting action mechanism can be vertical, horizontal or a certain angle and other forms, which are determined according to the application environment.

The vacuum insulated transmission rod can be used in high-voltage switches, including but not limited to vacuum circuit breakers, and the insulated rod needs to ensure both mechanical strength and electrical insulation performance.

The solid insulation form between the vacuum interrupter, the vacuum insulation transmission rod and the insulation shield includes but is not limited to direct pressure casting and silicone rubber potting, and the outer surface structure of the insulation shield includes but is not limited to grounding. The shielding layer and insulating shed are determined according to the application requirements of the vacuum circuit breaker.

The forms of the static-end high-voltage interface and the dynamic-end high-voltage interface include but are not limited to bare metal, insulating sleeve and inner cone socket, and are determined according to the high-voltage system integration method.

To sum up, in the vacuum insulated transmission rod and the miniaturized vacuum circuit breaker of the embodiment of the present invention, the vacuum insulated transmission rod includes a casing, a bellows and an insulating rod, and the vacuum circuit breaker includes a static terminal high voltage interface, a vacuum interrupter, an insulating shield Parts, intermediate connecting metal sleeve, vacuum insulation transmission rod, supporting action mechanism, base mounting plate, high voltage interface of moving end and electrical connection contact finger; wherein, the two ends of the insulating rod are respectively connected to the shell through bellows, and the bellows is connected to the shell. The shell forms a closed vacuum environment, which together form a vacuum insulation transmission rod. The vacuum insulation transmission rod, the vacuum interrupter and the insulating shield are cast into one structure. The static contact of the vacuum interrupter is connected to the high voltage interface of the static end, and the vacuum interrupter The moving contact of the chamber and the A-end of the vacuum-insulated transmission rod are connected by an intermediate connecting metal sleeve, and the intermediate-connecting metal sleeve and the high-voltage interface of the moving end are slidingly connected by an electrical connection and a contact finger, and the B-end of the vacuum-insulated transmission rod is connected with the supporting action mechanism Connection, insulation shield and supporting action mechanism are respectively fixed and installed on both sides of the base mounting plate. The vacuum insulated transmission rod and miniaturized vacuum circuit breaker can greatly reduce the electrical gap and space size between the high-voltage circuit and the ground. The miniaturized technical features are outstanding, and can be directly applied to high-altitude environments without altitude correction. Good, high insulation safety and reliability, can solve the technical bottlenecks and deficiencies of high-altitude application of solid insulation integration technology, and outstanding economic and social benefits.

In order to more clearly demonstrate the technical solutions provided by the present invention and the resulting technical effects, the following will describe in detail what is provided by the embodiments of the present invention with specific embodiments.

Example 1

As shown in FIG. 1 and FIG. 2 , the vacuum insulated transmission rod and the miniaturized vacuum circuit breaker of the present invention include a casing 10 , a bellows 11 , an insulating rod 12 , a static terminal high-voltage interface 1 , a vacuum interrupter 2 , and an insulating shield 3 , middle connection metal sleeve 4, vacuum insulation transmission rod 5, supporting action mechanism 6, base mounting plate 7, moving end high voltage interface 8 and electrical connection contact finger 9, static end high voltage interface 1, moving end high voltage interface 8, insulation shield The structural form of the component 3 is determined according to the system requirements, and the supporting action mechanism 6 can be in various forms such as pneumatic and electric. In this embodiment, the supporting action mechanism 6 is an electronically controlled pneumatic spring mechanism. Wherein, both ends of the insulating rod 12 are sealed and connected to the casing 10 through the bellows 11 respectively. The bellows 11 and the casing 10 form a closed vacuum environment and together form the vacuum insulation transmission rod 5. The working stroke of the bellows 11 is based on the vacuum circuit breaker. The opening distance and overtravel displacement are determined, the vacuum insulation transmission rod 5, the vacuum interrupter 2 and the insulating shield 3 are cast into an integral structure, the static contact of the vacuum interrupter 2 is connected to the static terminal high voltage interface 1, and the vacuum interrupter The moving contact of 2 is connected with the A-end of the vacuum insulated transmission rod 5 through the intermediate connecting metal sleeve 4, and the intermediate connecting metal sleeve 4 and the high-voltage interface 8 of the moving end are slidably connected by the electrical connecting contact finger 9, and the two can also be connected. It is a flexible wire conduction mode. The B end of the vacuum insulation transmission rod 5 is connected to the supporting action mechanism 6. The insulating shielding member 3 and the supporting action mechanism 6 are respectively fixed and installed on both sides of the base mounting plate 7. The supporting action mechanism 6 can be: Various forms such as vertical, horizontal or at a certain angle are determined according to the application environment. In this embodiment, the working stroke of the bellows 11 is 0-17.2 mm, and the supporting action mechanism 6 is a vertical structure, which is integrated and installed in the high-pressure box.

The vacuum insulated transmission rod 5 can be used in high-voltage switches, including but not limited to vacuum circuit breakers. The bellows 11 is a bidirectional working position, welded or formed by an integral mold, and can be stretched and compressed. The insulating rod 12 is a The metal and insulating material composite body is made of metal material at both ends and insulating material in the middle. The metal part is sealed with the bellows 11 by welding, and the insulating rod 12 needs to ensure both mechanical strength and electrical insulation performance. In this embodiment, the vacuum insulation transmission rod 5 is used for a vacuum circuit breaker, the bellows 11 is welded and formed layer by layer, the insulation rod 12 is a composite of copper alloy and resin + glass fiber, and the copper alloy is embedded in the resin + glass fiber. Inside the fiber, the tensile strength is ≥16KN, the power frequency withstand voltage is not less than 85kV for 1min, and the lightning impulse is not less than 185kV±15 times.

The solid insulation form between the vacuum interrupter 2, the vacuum insulation transmission rod 5 and the insulation shield 3 includes but is not limited to direct pressure casting and silicone rubber potting, and the outer surface structure of the insulation shield 3 includes but is not limited to the ground shielding layer and insulation. The umbrella skirt is determined according to the application requirements of the vacuum circuit breaker. In this embodiment, the outer surfaces of the vacuum interrupter 2 and the vacuum insulation transmission rod 5 are covered with 2mm thick silicone rubber, and are formed by pressure casting with the insulation shielding member 3, and the insulation shielding member 3 is made of epoxy resin material. Its outer surface structure is a ground shielding layer.

The forms of the static-end high-voltage interface 1 and the dynamic-end high-voltage interface 8 include but are not limited to bare metal, insulating sleeve and inner cone socket, and are determined according to the high-voltage system integration method. In this embodiment, the static-end high-voltage interface 1 and the dynamic-end high-voltage interface 8 are in the form of C-type insulating sleeves, which are used for solid insulation integration.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims (6)

1. a vacuum insulated transmission rod, is characterized in that, comprises shell, bellows and insulating rod; The insulating rod passes through the casing, and its two ends are respectively sealed and connected to the casing through the bellows. The bellows and the casing form a closed vacuum environment and together constitute the vacuum insulation transmission. rod. 2 . The vacuum insulated transmission rod according to claim 1 , wherein the bellows is a bidirectional working position, which can be stretched back to position and can be compressed back to position, and the insulating rod is a composite of metal and insulating material. 3 . , both ends are made of metal material, the middle is insulating material, and the metal material part is welded and sealed with the bellows. 3. A miniaturized vacuum circuit breaker, characterized by comprising a base mounting plate, an insulating shielding member is fixed on the upper side of the base mounting plate, and a matching action mechanism is fixed on the lower side, and the insulating shielding member is A vacuum interrupter, a middle connecting metal sleeve and the vacuum insulation transmission rod according to claim 1 or 2 are arranged in sequence from top to bottom, the top of the insulating shield is provided with a static terminal high voltage interface, and the side is provided with a dynamic terminal high voltage interface and electrical connection contacts; The insulating rod B end of the vacuum insulated transmission rod is connected with the matching action mechanism, and the A end is connected with the intermediate connecting metal sleeve. 4 . The vacuum insulated transmission rod and the miniaturized vacuum circuit breaker according to claim 3 , wherein the vacuum insulated transmission rod, the vacuum interrupter and the insulating shield are cast into an integral structure, and the vacuum interrupter is cast as an integral structure. 5 . The static contact of the arc chamber is connected to the static terminal high voltage interface, the movable contact of the vacuum interrupter is connected to the intermediate connection metal sleeve, and the intermediate connection metal sleeve and the moving terminal high voltage interface pass through The electrical connection fingers are slidably connected. 5 . The vacuum insulated transmission rod and miniaturized vacuum circuit breaker according to claim 4 , wherein the vacuum interrupter, the vacuum insulated transmission rod and the insulation shield are cast by direct pressure and/or Silicone rubber potting, and the outer surface structure of the insulating shield includes a ground shielding layer or an insulating shed. 6 . The vacuum insulated transmission rod and miniaturized vacuum circuit breaker according to claim 5 , wherein the static-end high-voltage interface and the dynamic-end high-voltage interface comprise bare metal, an insulating sleeve and/or an inner cone socket. 7 . .

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