Solid-sealed polar pole of environment-friendly cabinet

Abstract

The utility model discloses an environment-friendly cabinet solid-sealed polar pole, which comprises an epoxy resin insulating layer, a wire inlet conductor, a bolt, a butterfly-shaped gasket, a vacuum arc-extinguishing chamber, a wire outlet conductor and a mounting nut, and is characterized in that the wire inlet conductor is arranged at the top of the epoxy resin insulating layer. Connection of a high-voltage loop is facilitated; and 2, the height of the whole insulating cylinder is reduced, so that the miniaturization of the switch is realized. The miniaturized vacuum arc-extinguishing chamber meets the requirement of creepage distance and is not influenced by external environmental conditions through the coated epoxy resin layer. Miniaturization of the product and simplification of parts are achieved, and the product is light in weight and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-sealed poles, in particular to a solid-sealed pole of an environmental protection cabinet. Background Art

[0002] In the medium voltage distribution network, SF6 insulating medium is widely used in the ring network switchgear. As one of the six greenhouse gases, SF6 gas has attracted wide attention from all walks of life. my country has made energy conservation and emission reduction a national policy for sustainable development.

[0003] The ring main unit that uses environmentally friendly gas as the external insulation method is developed to replace SF6 insulated switchgear equipment to meet the needs of adapting to harsh environmental conditions. Its structural features are: the entire conductive circuit of the switch is sealed in epoxy resin insulation material, the upper end of the arc extinguishing chamber is connected to the high-voltage incoming line, the outgoing conductor is connected to the outgoing bushing, and the external insulation of the arc extinguishing chamber is not affected by external conditions, such as plateau areas, dirty and humid areas, etc., achieving good environmental resistance. The use of miniaturized vacuum arc extinguishing chambers reduces the height and diameter of the entire product, thereby realizing the miniaturization of the switch.

[0004] The main drawbacks of the traditional solution:

[0005] 1. SF6 is one of the gases that is explicitly banned by the Kyoto Protocol, and it has a significant greenhouse effect;

[0006] 2. Using SF6 as the external insulating medium, due to its high dielectric strength, the distance between the high voltage and the ground can be designed to be small. If the box leaks (strictly speaking, it is not completely sealed, but the leakage rate is different), it is easy to cause phase-to-phase and ground breakdown;

[0007] 3. The conductive circuit connection requirements in the box are high (SF6 interface effect is obvious);

[0008] 4. The box is filled with SF6 at a certain pressure, which places high demands on the quality of the box itself (using stainless steel, precision welding, and pressure resistance). Utility Model Content

[0009] In order to overcome the deficiencies of the prior art, one of the objectives of the utility model is to provide an environmental protection cabinet sealed pole.

[0010] One of the purposes of the utility model is achieved by the following technical solution:

[0011] The environmental protection cabinet sealed pole includes an epoxy resin insulation layer, an incoming conductor, bolts, a butterfly gasket, a vacuum interrupter, an outgoing conductor and a mounting nut. The incoming conductor is arranged on the top of the epoxy resin insulation layer, the outgoing conductor is arranged on the bottom of the epoxy resin insulation layer, the vacuum interrupter is fixedly installed inside the epoxy resin insulation layer by bolts and butterfly gaskets, and the mounting nut is installed on the left side of the epoxy resin insulation layer.

[0012] Furthermore, four mounting nuts are provided, and the four mounting nuts are arranged in a rectangular array.

[0013] Furthermore, the epoxy resin insulation layer is formed by an epoxy resin automatic pressure gel molding process.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The inlet and outlet ends of the high-voltage circuit are located on both sides of the sealed pole insulation cylinder. First, it is convenient for the connection of the high-voltage circuit; second, it reduces the height of the entire insulation cylinder, thereby realizing the miniaturization of the switch. The miniaturized vacuum interrupter meets the requirements of creepage distance and is not affected by external environmental conditions through the epoxy resin layer. The miniaturization of the product and the simplification of parts are achieved, and the product is light in weight and easy to install.

[0016] 2. The conductive circuit includes the incoming conductor, vacuum interrupter, flexible connection (post-installation), and outgoing conductor, forming a complete switch opening and closing circuit. The incoming conductor is connected to the incoming bushing, the outgoing conductor is connected to the outgoing bushing, and then connected to the upper-level substation and the user end.

[0017] 3. When assembling the sealed pole insulation cylinder, a soft connection and an insulating pull rod are installed inside. The sealed pole insulation cylinder is fixed with 4 nuts. After the internal assembly, it is fixed on the installation surface of the switch cabinet. Due to the use of epoxy resin automatic pressure gel molding process (APG), the overall mechanical properties are significantly improved. The dimensional accuracy of the product is improved by accurate size control of the mold, which is beneficial to improve the compatibility of the conductive circuit, reduce contact resistance, and improve interchangeability. In the whole solution, the switch cabinet has a small depth (miniaturized switch), good interchangeability, easy installation, and high reliability.

[0018] 4. During production, the connection torque between the incoming conductor and the vacuum interrupter is controlled. The vacuum interrupter is perpendicular to the installation surface as a whole, ensuring low contact resistance of the conductive circuit, reducing thermal aging of the insulator, and greatly improving the service life of the product.

[0019] 5. The rated voltage of this solid-sealed pole insulator is 12kV, and the current value is 630A. According to the isolation position, it can be divided into two schemes: upper isolation and lower isolation, which can meet the needs of ring network power supply in cities, factories, etc.

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of this embodiment;

[0022] Figure 2 is a top view of this embodiment;

[0023] Figure 3 It is a left side view of this embodiment;

[0024] Figure 4 It is a right side view of this embodiment.

[0025] In the figure: 1. Epoxy resin insulation layer; 2. Incoming conductor; 3. Bolt; 4. Butterfly gasket; 5. Vacuum interrupter; 6. Outgoing conductor; 7. Mounting nut. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] See also Figures 1 to 4The environmental protection cabinet sealed pole includes an epoxy resin insulation layer 1, an incoming conductor 2, a bolt 3, a butterfly gasket 4, a vacuum interrupter 5, an outgoing conductor 6 and a mounting nut 7. The epoxy resin insulation layer 1 adopts an epoxy resin automatic pressure gel molding process. The incoming conductor 2 is arranged on the top of the epoxy resin insulation layer 1, and the outgoing conductor 6 is arranged on the bottom of the epoxy resin insulation layer 1. The vacuum interrupter 5 is fixedly installed inside the epoxy resin insulation layer 1 by bolts 3 and butterfly gaskets 4. The mounting nut 7 is installed on the left side of the epoxy resin insulation layer 1. Four mounting nuts 7 are provided, and the four mounting nuts 7 are arranged in a rectangular array.

[0030] Working principle: When the utility model is in use, the incoming conductor 2, the vacuum interrupter 5, the flexible connection (later installed) and the lower outlet seat constitute the entire closing and opening circuit of the switch, and the epoxy resin insulation layer 1 provides fixed support, ground insulation and surface insulation for the conductive circuit, thereby realizing the miniaturization of the switch.

[0031] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An environmental protection cabinet sealed pole, comprising an epoxy resin insulation layer (1), an incoming conductor (2), a bolt (3), a butterfly gasket (4), a vacuum interrupter (5), an outgoing conductor (6) and a mounting nut (7), characterized in that: The incoming conductor (2) is arranged on the top of the epoxy resin insulation layer (1), the outgoing conductor (6) is arranged on the bottom of the epoxy resin insulation layer (1), the vacuum interrupter (5) is fixedly installed inside the epoxy resin insulation layer (1) by means of bolts (3) and butterfly washers (4), and the mounting nut (7) is installed on the left side of the epoxy resin insulation layer (1).

2. The environmental protection cabinet sealed pole according to claim 1, characterized in that: Four mounting nuts (7) are provided, and the four mounting nuts (7) are arranged in a rectangular array.

3. The environmental protection cabinet sealed pole according to claim 1, characterized in that: The epoxy resin insulation layer (1) is formed using an epoxy resin automatic pressure gel molding process.

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