Vacuum circuit breaker for 4500m high altitude area

Abstract

The invention discloses a vacuum circuit breaker for a 4500m high altitude area. A main body structure of the vacuum circuit breaker comprises a base assembly, an upper insulator assembly, a main insulator, an auxiliary insulator, a wire inlet end protective cover and a wire outlet end protective cover, the main insulator and the auxiliary insulator jointly support the upper insulator which is horizontally installed, and the wire inlet end protective cover and the wire outlet end protective cover protect the high-voltage wire inlet end and the high-voltage wire outlet end, so that an external electric field is uniform, the insulation performance is improved, and the overall high-voltage ground electrical distance meets the technical requirements of application of railway locomotives in high-altitude areas. Compared with an upper insulator vertical type vacuum circuit breaker, the overall height and the gravity center of the vacuum circuit breaker are reduced, and the operation reliability of the vacuum circuit breaker is improved. The vacuum circuit breaker is mainly suitable for insulation performance and creepage distance requirements in 4500m high-altitude areas, improves the electrical insulation performance, and is suitable for high-altitude severe environments.

Description

Technical Field

[0001] The present invention relates to a rail vehicle circuit breaker, in particular to a vacuum circuit breaker for use in areas at an altitude of 4500m, mainly used for 25kV contact network vehicle-mounted vacuum circuit breakers in areas at an altitude of 4500m. Background Art

[0002] Vacuum circuit breakers are suitable for all types of electric locomotives and EMUs with AC 25kV mains. They are installed on the roof of locomotives or EMUs. They are the main switch for electrical connection and disconnection between the whole vehicle and the contact network. They are the most important protective equipment on locomotives and EMUs. When various serious faults occur in the vehicle, the vacuum circuit breaker can quickly, reliably and safely cut off the vehicle's total power supply, thereby protecting the vehicle's electrical equipment.

[0003] The structural features of the vacuum circuit breaker are: single-break cylinder transmission, electric-pneumatic control, it uses vacuum as the insulating medium and arc extinguishing medium, and uses the deionization effect formed by the high insulation strength and arc diffusion capacity under the vacuum state to extinguish the arc. The main structure of the vacuum circuit breaker includes the base assembly, the upper insulator assembly, the main insulator, the auxiliary insulator, the inlet end protection cover, and the outlet end protection cover.

[0004] The main insulator of the circuit breaker is installed on the base, the upper insulator assembly is assembled with the main insulator through a flange, the auxiliary insulator is installed on the base, and the other end is assembled with the upper insulator through a flange. The vacuum bag as the main circuit connector is installed in the upper insulator. The flange is a copper-chromium alloy, cast on the upper insulator assembly, and is used to connect the current between the busbar and the circuit breaker. When the solenoid valve is energized, the circuit breaker is closed. When the solenoid valve loses power, the disconnecting mechanism installed together with the vacuum bag disconnects the circuit breaker, and the circuit breaker moving contact is connected to the clamping ring. The circuit breaker control and monitoring equipment is installed inside the base.

[0005] At present, the widely used vacuum circuit breakers are divided into upper insulator upright type and upper insulator horizontal type in terms of structural form. The movement direction of the vacuum package contacts inside the upper insulator upright vacuum circuit breaker is the same as the movement direction of the insulating pull rod. The overall height is high and the center of gravity is high. In order to meet the insulation requirements of high-altitude areas and increase the high-voltage electrical gap to the ground, the height of the lower insulator needs to be increased. In this way, the overall height of the circuit breaker will exceed the train limit and cannot be used.

[0006] For areas at an altitude of 4,500m, the height of insulators needs to be increased to improve the electrical insulation distance. Insulators that are too high will further increase wind resistance and safety risks.

[0007] In view of this, the present invention is proposed. Summary of the invention

[0008] The purpose of the present invention is to provide a vacuum circuit breaker for use in areas at an altitude of 4500m to solve the above-mentioned technical problems existing in the prior art.

[0009] The objective of the present invention is achieved through the following technical solutions:

[0010] The vacuum circuit breaker for use in 4500m high altitude areas of the present invention comprises a base assembly, an upper insulator assembly, a main insulator, and an auxiliary insulator;

[0011] The main insulator and the auxiliary insulator are vertically mounted on the base assembly, and the main insulator and the auxiliary insulator jointly support the horizontally mounted upper insulator assembly, and the metal incoming line end and the metal outgoing line end of the upper insulator assembly are respectively covered with an incoming line end protective cover and an outgoing line end protective cover.

[0012] Compared with the prior art, the vacuum circuit breaker for use in areas at an altitude of 4500m provided by the present invention adopts a horizontally placed upper insulator vacuum circuit breaker to lower the center of gravity, and is equipped with an incoming line protection cover and an outgoing line protection cover to protect high-voltage metal parts, reduce the risk of high-voltage discharge to the ground in a high-altitude environment, and greatly improve safety. The movement direction of the internal vacuum package contact is perpendicular to the movement direction of the insulating pull rod, that is, the insulating pull rod needs to be turned through a connecting rod mechanism to drive the vacuum package moving contact to move and achieve disconnection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a cross-sectional structural diagram of a vacuum circuit breaker in an embodiment of the present invention;

[0014] Figure 2 is a top view of a vacuum circuit breaker in an embodiment of the present invention;

[0015] Figure 3 is a structural diagram of a vacuum circuit breaker in an embodiment of the present invention;

[0016] In the figure:

[0017] 1 base assembly, 2 upper insulator assembly, 3 main insulator, 4 auxiliary insulator, 5 incoming line protection cover, 6 outgoing line protection cover. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0019] First, the terms that may be used in this article are explained as follows:

[0020] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0021] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0022] The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used in the examples of the present invention, they are all conventional products that can be purchased commercially.

[0023] The vacuum circuit breaker for use in 4500m high altitude areas of the present invention comprises a base assembly, an upper insulator assembly, a main insulator, and an auxiliary insulator;

[0024] The main insulator and the auxiliary insulator are vertically mounted on the base assembly, and the main insulator and the auxiliary insulator jointly support the horizontally mounted upper insulator assembly, and the metal incoming line end and the metal outgoing line end of the upper insulator assembly are respectively covered with an incoming line end protective cover and an outgoing line end protective cover.

[0025] The base assembly is internally assembled with an air circuit system, circuit control and signal feedback circuits.

[0026] The vacuum tube for disconnecting the contact network and the train current is installed in the upper insulator and is connected to the spring mechanism and the steering mechanism. The steering mechanism is connected to the transmission rod, and the transmission rod is connected to the driving cylinder in the base.

[0027] The electrical clearance and surface shed creepage distance of the main insulator, auxiliary insulator and internal transmission rod all meet the electrical insulation requirements of 4500m high altitude areas.

[0028] In summary, the vacuum circuit breaker for use in 4500m high altitude areas according to the embodiment of the present invention has a main structure including a base assembly, an upper insulator assembly, a main insulator, an auxiliary insulator, an inlet terminal protection cover, and an outlet terminal protection cover (such as Figure 1). The key components of the internal structure include vacuum tubes, steering operating mechanisms, transmission rods, drive cylinders, solenoid valves, gas storage cylinders and other components. The main insulators and auxiliary insulators jointly support the horizontally installed upper insulators. The inlet and outlet protective covers protect the high-voltage inlet and outlet terminals, making the external electric field uniform and improving the insulation performance. The overall high-voltage electrical distance to the ground meets the technical requirements for the use of railway locomotives in high-altitude areas. Compared with the upper insulator upright vacuum circuit breaker, the overall height and center of gravity of the vacuum circuit breaker are reduced, and the reliability of the operation of the vacuum circuit breaker is improved.

[0029] The present invention mainly designs a main insulator, an auxiliary insulator, an upper insulator assembly, an incoming line protection cover, and an outgoing line protection cover that are suitable for the insulation performance and creepage distance requirements in areas with a high altitude of 4500m, thereby improving the electrical insulation performance of the vacuum circuit breaker and being suitable for harsh environments at high altitudes.

[0030] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0031] The design content of the present invention includes: a vacuum circuit breaker base assembly, an upper insulator assembly, a main insulator, an auxiliary insulator, an inlet terminal protection cover, and an outlet terminal protection cover.

[0032] The upper insulator of the vacuum circuit breaker is installed on the main insulator and the auxiliary insulator, which are installed on the base assembly. The gas circuit system, circuit control and signal feedback circuit are assembled inside the base. The vacuum tube is installed in the upper insulator to disconnect the contact network and train current. Insulation protective covers are installed on the high-voltage incoming and outgoing terminals.

[0033] The vacuum circuit breaker used in the 4500m altitude area described in the embodiment of the present invention has main insulators and auxiliary insulators that meet the technical requirements for use in high-altitude areas. The high-voltage inlet and outlet protective covers further evenly optimize the electric field distribution at the high-voltage end. The driving method adopts a right-angle steering mechanism operation method. This steering transmission method reduces the overall height of the vacuum circuit breaker and meets the limit requirements of the vehicle-mounted vacuum circuit breaker. The vacuum circuit breaker used in the 4500m altitude area described in the embodiment of the present invention has a mechanical structure and electrical performance that meet the use requirements of the vehicle-mounted vacuum circuit breaker. At the same time, it adapts to the harsh environment of high-altitude areas with thin air, low air pressure, low corona inception voltage, and easy high-voltage discharge to the ground, and has a very broad application prospect.

[0034] Example 1

[0035] External structure and cross-sectional view of vacuum circuit breaker at 4500m altitude (such as Figure 1 and Figure 2), the overall structure includes a base assembly 1, an upper insulator assembly 2, a main insulator 3, an auxiliary insulator 4, an inlet end protection cover 5, and an outlet end protection cover 6. The present invention designs the overall structure of a vacuum circuit breaker and the structures of components such as the main insulator, the auxiliary insulator, the inlet end protection cover, the outlet end protection cover, and the assembly method between the components. Figure 2 and Figure 3 It is a top view and three-dimensional structure diagram of the vacuum circuit breaker, which is used to illustrate the overall structure of the circuit breaker and the installation positions of its components.

[0036] The upper insulator of the vacuum circuit breaker is installed horizontally on the main insulator and the auxiliary insulator, and the main insulator and the auxiliary insulator are installed vertically on the base. The gas circuit system, circuit control and signal feedback circuit are assembled inside the base. The high-voltage inlet end is equipped with an inlet end protection cover, and the high-voltage outlet end is equipped with an outlet end protection cover. The vacuum tube used to disconnect the contact network and the train current is installed in the upper insulator and connected to the spring mechanism and the steering mechanism. The steering mechanism is connected to the transmission rod, and the transmission rod is connected to the driving cylinder in the base. When the circuit breaker needs to be closed, the train supplies air to the vacuum circuit breaker air storage cylinder and supplies power to the solenoid valve. The solenoid valve opens the air circuit valve, and the high-pressure air pushes the cylinder piston to move. The steering mechanism pushes the spring mechanism and the vacuum tube moving contact to move, so that the main contact of the vacuum circuit breaker is closed, and the reset spring is compressed to store energy. When the circuit breaker needs to be opened, the train cuts off the power to the control line, the solenoid valve closes the air supply valve and discharges the high-pressure air, and the reset spring in the spring mechanism pulls the main contact open to restore the circuit breaker to the open state.

[0037] The electrical clearance and surface shed creepage distance of the main insulator, auxiliary insulator and internal transmission rod meet the electrical insulation requirements of 4500m high altitude areas. The two insulators also support and connect the upper insulator and the steering flange. The two ends of the upper insulator are respectively covered with the incoming line protection cover and the outgoing line protection cover for insulation protection to prevent high voltage discharge to the ground. The steering flange is used to connect the high-voltage line of the train, and the steering flange is also covered with the incoming line protection cover made of silicone rubber.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in 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 the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A vacuum circuit breaker for use in areas at an altitude of 4500m, characterized in that: Including base assembly, upper insulator assembly, main insulator, auxiliary insulator; The main insulator and the auxiliary insulator are vertically mounted on the base assembly, and the main insulator and the auxiliary insulator jointly support the horizontally mounted upper insulator assembly, and the metal incoming line end and the metal outgoing line end of the upper insulator assembly are respectively covered with an incoming line end protective cover and an outgoing line end protective cover.

2. The vacuum circuit breaker for use in 4500m high altitude areas according to claim 1, characterized in that: The base assembly is internally assembled with an air circuit system, circuit control and signal feedback circuits.

3. The vacuum circuit breaker for use in 4500m high altitude areas according to claim 2 is characterized in that: The vacuum tube for disconnecting the contact network and the train current is installed in the upper insulator and is connected to the spring mechanism and the steering mechanism. The steering mechanism is connected to the transmission rod, and the transmission rod is connected to the driving cylinder in the base.

4. The vacuum circuit breaker for use in 4500m high altitude areas according to claim 1, 2 or 3, characterized in that: The electrical clearance and surface shed creepage distance of the main insulator, auxiliary insulator and internal transmission rod all meet the electrical insulation requirements of 4500m high altitude areas.

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