An integrated vacuum interrupter mounting support module

Abstract

The utility model relates to a kind of integrated vacuum arc-extinguishing chamber installation support module, including integrally-formed mounting bracket and insulating cylinder, vacuum arc-extinguishing chamber is installed in insulating cylinder;Insulating cylinder has three in total, it is in the form of a word distribution on mounting bracket, the bottom end of insulating cylinder is also provided with center conductor, and center conductor and insulating cylinder integrally cast molding;The mounting bracket includes a mouth word outer frame, several transverse and longitudinal staggered distribution inner ribs are distributed in outer frame, three through holes for insulating cylinder plug-in installation are provided on mounting bracket, the two sides of the long axis direction of outer frame are also provided with brass inserts and isolation plate, four insulating support plates distributed along the long axis direction are also provided on outer frame.The support module in the utility model, three-phase vacuum arc-extinguishing chamber is assembled in insulating cylinder and fixed, live conductor can be isolated in insulating cylinder, improve insulation performance, also can realize the compact design of product, and the pouring strength of overall integrated structure design is good, assembly is simple.

Description

Technical Field

[0001] This utility model relates to the field of ring main unit switchgear, and in particular to an integrated vacuum interrupter installation support module. Background Technology

[0002] Currently, medium-voltage switchgear typically uses SF6 gas as the insulating medium because SF6 gas has excellent properties in terms of dielectric properties, thermal properties, and arc-extinguishing properties, which can meet the compact design requirements of switchgear. Therefore, there are relatively many switchgear devices on the market that use SF6 gas as the insulating medium. However, since SF6 is a fluorinated gas with high potential for global warming, the use of this greenhouse gas should be reduced.

[0003] Environmentally friendly gas-insulated ring main units use dry air as the insulating medium, which can significantly reduce greenhouse gas emissions. However, the insulation performance of dry air is much worse than that of SF6 gas.

[0004] The existing environmentally friendly gas ring main unit switch structure mainly adopts two types of structures. One type is a vacuum interrupter body with a solid (epoxy resin, etc.) cast chamber. It mainly uses epoxy solid insulation as a support component. The interrupter switch body is usually cast separately as an epoxy sealing component. Epoxy resin is a thermosetting material, which is not easy to degrade, and it is also heavy, brittle, easily damaged and cannot be repaired, which is not conducive to assembly and transportation. The second type adopts a clamp fixing scheme, which uses two insulating plates to fix and support the three-phase vacuum interrupter in the clamp. The live conductors are not protected, the electric field distribution is uneven, the insulation level is low, and it is not easy to miniaturize the design. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an integrated vacuum interrupter installation support module that is compact in installation and easy to assemble.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: an integrated vacuum interrupter installation support module, the innovation of which is: including an integrally formed mounting frame and an insulating cylinder, with the vacuum interrupter installed inside the insulating cylinder;

[0007] There are three insulating cylinders in total, arranged in a straight line on the mounting frame. A central conductor is also provided at the bottom of the insulating cylinder, and the central conductor is integrally cast with the insulating cylinder. A mounting groove extending along the outline of the outer wall of the central conductor is also opened in the middle of the outer wall of the central conductor.

[0008] The mounting frame includes a U-shaped outer frame with several horizontally and vertically staggered inner ribs distributed within it. The mounting frame has three through holes for inserting insulating cylinders, and several mounting ribs are also provided at the through holes. The mounting ribs have arc-shaped insertion slots. Arc-shaped insertion posts for cooperating with the mounting ribs are also provided on the outer wall of the insulating cylinder. Brass inserts and isolation plates are provided on both sides of the long axis of the outer frame, extending along the width of the outer frame. Four insulating support plates are also provided on the outer frame, distributed along the long axis. Two insulating support plates are located between two adjacent insulating cylinders, and the other two are located on either side of the two outermost insulating cylinders.

[0009] Furthermore, the insulating cylinder is also provided with heat dissipation channels. There are several heat dissipation channels, which are vertically distributed inside the insulating cylinder along the circumference of the insulating cylinder and run through the entire insulating cylinder from top to bottom.

[0010] Furthermore, the bottom end of the insulating cylinder is also provided with an isolation cover for the outgoing terminal.

[0011] Furthermore, the top of the insulating cylinder is provided with four rectangular copper inserts.

[0012] The advantages of this utility model are as follows: the support module of this utility model, the three-phase vacuum interrupter is assembled and fixed inside the insulating cylinder, the live conductor can be isolated inside the insulating cylinder, which improves the insulation performance and also realizes the compact design of the product. Moreover, the overall integrated structure design has good casting strength and simple assembly.

[0013] The design of the isolation plates on both sides of the mounting bracket is used to insulate the main circuit conductors from the front and rear plates of the disconnect switch installation, thereby increasing the relative insulation distance.

[0014] The design of the heat dissipation channel inside the insulating cylinder is to facilitate heat dissipation during the operation of the vacuum interrupter.

[0015] An isolation cover for the outgoing terminal is added to the bottom of the insulating cylinder to provide phase-to-phase insulation between the center conductor and the stationary contact.

[0016] The design of the copper insert at the top of the insulating cylinder ensures that the shielding cover is installed on a horizontal plane and also improves the assembly strength. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation support module for the integrated vacuum interrupter of this utility model.

[0018] Figure 2 This is a front view of the integrated vacuum interrupter installation support module of this utility model.

[0019] Figure 3Schematic diagram of the heat dissipation channel in the present utility model.

[0020] Figure 4 Schematic diagram of the central conductor in the present utility model.

[0021] Figure 5 Cross-sectional view of the central conductor in the present utility model. Specific embodiments

[0022] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in combination with the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and their effects of the present utility model as follows.

[0023] As Figures 1-5 shown, an integrated vacuum interrupter installation support module includes an integrally formed mounting frame and an insulating cylinder 2. The vacuum interrupter is installed inside the insulating cylinder 2. In this embodiment, both the mounting frame and the insulating cylinder 2 are made of PBT or a mixture of PA66 and epoxy fiberglass, with high strength, good toughness and light weight.

[0024] There are a total of three insulating cylinders 2, which are distributed in a straight line on the mounting frame. At the bottom end of the insulating cylinder 2, a central conductor 7 for fixing the vacuum interrupter and the static contact of the disconnector is also provided, and the central conductor 7 is integrally cast with the insulating cylinder 2. A mounting groove 8 extending along the outer wall contour line of the central conductor 7 is also opened in the middle position of the outer wall of the central conductor 7. The design of the mounting groove 8 is to improve the stability of the casting of the central conductor 7 and the insulating cylinder 2.

[0025] The insulating cylinder 2 is also provided with heat dissipation channels 6. There are several heat dissipation channels 6, which are vertically distributed inside the insulating cylinder 2 along the circumferential direction of the insulating cylinder 2, and the heat dissipation channels 6 penetrate through the entire insulating cylinder 2 up and down. The cross-section of the heat dissipation channels 6 is trapezoidal. The heat dissipation channels 6 that penetrate through up and down are used for heat dissipation, and the heat dissipation effect is better, which is more conducive to the heat dissipation of the vacuum interrupter installed inside the insulating cylinder 2, and improves the reliability of the product operation.

[0026] At the bottom end of the insulating cylinder 2, an outgoing terminal isolation cover 5 is also provided. The outgoing terminal isolation cover 5 is a square frame structure with a mouth shape, and the outgoing terminal isolation cover 5 surrounds the central conductor 7, so as to use the outgoing terminal isolation cover 5 to achieve the phase insulation isolation between the central conductor 7 and the static contact of the disconnector.

[0027] At the top end of the insulating cylinder 2, four copper inserts distributed in a rectangular shape are also provided, and the cooperation of the four copper inserts is used to ensure the horizontal plane of the installation of the shielding cover and also improve the assembly strength.

[0028] The mounting bracket includes a U-shaped outer frame 1, within which several horizontally and vertically staggered inner ribs 13 are distributed. The mounting bracket has three through holes for inserting and installing insulating cylinders 2, and several mounting ribs 14 are also provided at the through holes. The mounting ribs 14 and the inner ribs 13 are integrally injection molded. Arc-shaped insertion grooves are opened on the mounting ribs 14. Arc-shaped insertion posts 21 for cooperating with the mounting ribs 14 are also provided on the outer wall of the insulating cylinder 2. Brass inserts 11 and isolation plates 12 are also provided on both sides of the long axis of the outer frame 1. The isolation plates 12 extend along the width of the outer frame 1 and serve as an insulation channel between the metal plate of the disconnect switch and the conductor of the main circuit. The brass inserts 11 are for facilitating the positioning and installation of the disconnect switch.

[0029] Four insulating support plates 4 are also provided on the outer frame 1 along the long axis. The insulating support plate 4 is a vertically arranged rectangular plate. Two of the insulating support plates 4 are located between two adjacent insulating cylinders 2, and the other two insulating support plates 4 are located on both sides of the two outermost insulating cylinders 2. The design of the insulating support plates 4 is to serve as phase-to-phase insulation isolation, and at the same time, it can also play a role in enhancing the overall strength of the mounting frame.

[0030] The support module in this utility model is suitable for the installation of vacuum interrupters in environmentally friendly gas cabinets. It adopts a one-piece casting method with plastic nylon, which is relatively inexpensive. The insulating cylinder structure ensures the insulation performance of the product, optimizes the electric field distribution, and is conducive to compact design. The one-piece assembly is conducive to improving production efficiency and large-scale production.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An integrated vacuum interrupter mounting support module, characterized by: It includes an integrally molded mounting frame and an insulating cylinder, with the vacuum interrupter installed inside the insulating cylinder; There are three insulating cylinders in total, arranged in a straight line on the mounting frame. A central conductor is also provided at the bottom of the insulating cylinder, and the central conductor is integrally cast with the insulating cylinder. A mounting groove extending along the outline of the outer wall of the central conductor is also opened in the middle of the outer wall of the central conductor. The mounting frame includes a U-shaped outer frame with several horizontally and vertically staggered inner ribs distributed within it. The mounting frame has three through holes for inserting insulating cylinders, and several mounting ribs are also provided at the through holes. The mounting ribs have arc-shaped insertion slots. Arc-shaped insertion posts for mating with the mounting ribs are also provided on the outer wall of the insulating cylinder. Brass inserts and isolation plates are provided on both sides of the long axis of the outer frame, extending along the width of the outer frame. Four insulating support plates are also provided on the outer frame, distributed along the long axis. Two insulating support plates are located between two adjacent insulating cylinders, and the other two are located on either side of the two outermost insulating cylinders.

2. The integrated vacuum interrupter installation support module according to claim 1, characterized in that: The insulating cylinder also has several heat dissipation channels, which are vertically distributed inside the insulating cylinder along the circumference and run through the entire insulating cylinder from top to bottom.

3. The integrated vacuum interrupter installation support module according to claim 1, characterized in that: The bottom end of the insulating cylinder is also provided with an isolation cover for the outgoing terminal.

4. The integrated vacuum interrupter installation support module according to claim 1, characterized in that: The top of the insulating cylinder is also provided with four rectangular copper inserts.

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