CN209804536U - Miniaturized vacuum type gas insulated metal enclosed switchgear - Google Patents

Abstract

The utility model belongs to the power transmission and transformation equipment among the electric power industry, in particular to miniaturized vacuum type gas-insulated metal-enclosed switchgear. The transmission mechanism box is fixedly arranged above the support, the three tank bodies are fixed above the transmission mechanism box in parallel, a permanent magnet mechanism is arranged in the middle of the right side face of the transmission mechanism box, a gas detection device is arranged above the self-sealing connector in a communicated manner, the lower end of a solid-sealed polar column is connected with the upper end of each insulating pull rod, the right end of the umbrella skirt sleeve is connected with the contact finger in an assembled manner, conductive seats are respectively arranged below the three transmission boxes, the conductive rods are connected below the conductive seats, contact seats are arranged at the lower ends of the conductive rods, and the right end of the cable integrated sleeve is connected to the left side of each contact seat. The permanent magnet operating mechanism is adopted to replace transmission parts such as a connecting rod and a cam, so that the loss of parts is reduced, the service life of the combined electrical appliance is prolonged, the whole mechanism is compact, small in size, light in weight, convenient to install, low in noise during operation, suitable for various severe environments, and safe and reliable in performance.

Description

Miniaturized vacuum type gas insulated metal enclosed switchgear

Technical Field

The utility model belongs to the power transmission and transformation equipment among the electric power industry, in particular to miniaturized vacuum type gas-insulated metal-enclosed switchgear.

Background

At present, in 12KV power grid construction in urban and rural areas, outdoor high-voltage combined electrical appliances of power plant power stations mostly adopt outdoor three-phase alternating-current power transmission and transformation equipment using SF6 gas as an insulating medium, SF6 gas is decomposed under the influence of factors such as spark discharge, partial discharge and high temperature, and decomposed substances of the SF6 gas can become corrosive electrolyte after meeting moisture, so that the aluminum alloy has a serious corrosion effect, resin materials and ceramic insulation are damaged, the insulation level is greatly reduced, the contact resistance is sharply increased, and damage or explosion accidents are easy to occur in operation. If the combined electrical apparatus uses SF6 gas as the arc extinguishing medium and is used in a low-voltage electrical apparatus which is frequently operated, due to the arc action of the frequent operation, the metal vapor reacts with the decomposition products of the SF6 gas, the deposition of the products on the contact surface can seriously corrode the contact material, thereby the contact resistance is increased sharply, and the sealed contact filled with the SF6 gas can not work reliably, so that the SF6 gas is not suitable for the low-voltage electrical apparatus which is frequently operated as the arc extinguishing medium. The SF6 high-voltage combined electrical apparatus uses the traditional operating mechanism, the traditional operating mechanism has spring mechanism, pneumatic mechanism, hydraulic pressure mechanism etc., and with the development of switch technology, the spring operating mechanism gradually becomes the mainstream product. However, the spring operating mechanism has complex transmission, key components are easy to abrade and rust, the failure rate is high, and the work load is increased for a power plant and a power station.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned technique not enough, provide a compact structure, safe and reliable, long service life's miniaturized vacuum type gas-insulated metal-enclosed switchgear.

The utility model provides a technical scheme that technical problem adopted is: the miniaturized vacuum type gas insulated metal-enclosed switchgear comprises a bracket, a transmission mechanism box body, a tank body, a permanent magnet mechanism and an auxiliary switch, and is characterized in that: a transmission mechanism box body is fixedly arranged above the bracket, three tank bodies are fixed above the transmission mechanism box body in parallel, a permanent magnet mechanism is arranged in the middle of the right side surface of the transmission mechanism box body, a transmission mechanism is arranged in the transmission mechanism box body, three insulating pull rods are connected on the transmission mechanism, the upper ends of the insulating pull rods are connected with the lower ends of solid-sealed polar columns in the three tank bodies, a self-sealing joint is arranged below the right side outside the middle tank body and is connected with the inner cavities of the tank bodies at two sides through pipelines, a gas detection device is communicated above the self-sealing joint, the upper end of each insulating pull rod is connected with the lower end of the solid-sealed polar column, the solid-sealed polar column is arranged in the tank body which is connected with the transmission mechanism box body in a sealing manner, a contact finger assembly is connected below the left side of the solid-sealed polar column, the contact finger assembly is connected with the right end of an, three transmission boxes are connected below the three-station operating mechanism, conductive seats are respectively arranged below the three transmission boxes, conductive rods are connected below the conductive seats, contact seats are arranged at the lower ends of the conductive rods, and the left sides of the contact seats are connected with the right end of the cable integrated sleeve.

The utility model has the advantages that: the miniaturized vacuum type gas insulated metal-enclosed switchgear adopts the permanent magnet operating mechanism to replace transmission parts such as a connecting rod and a cam, reduces the loss of parts, prolongs the service life of a combined electrical appliance, and has the advantages of compact integral mechanism, small volume, light weight, convenient installation, low noise during operation, suitability for frequent operation, suitability for various severe environments, and safe and reliable performance.

Drawings

The following description is made in detail by way of example with reference to the accompanying drawings.

Fig. 1 is a front partial sectional view of a miniaturized vacuum type gas insulated metal enclosed switchgear structure.

Fig. 2 is a right side view of fig. 1.

In the figure, 1-three-position operating mechanism; 2-a transmission case; 3-a conductive seat; 4-a conductive rod; 5-an observation window; 6-tank body; 7-a grounding device; 8-a gas detection device; 9-self-sealing joints; 10-an insulating pull rod; 11-a permanent magnet mechanism; 12-an auxiliary switch; 13-a scaffold; 14-a transmission mechanism; 15-a transmission mechanism box; 16-finger assembly; 17-shed sleeves; 18-solid sealing of the pole; 19-conductive assembly; 20-cable integral sleeve; 21-a contact seat; 22-three-position isolating/grounding switch; 23-vacuum interrupter.

Detailed Description

In the embodiment, referring to fig. 1 and 2, a transmission mechanism box 15 is fixedly arranged above a rectangular frame type support 13, three tank bodies 6 of a three-phase box-separating structure are fixed above the transmission mechanism box 15 in parallel, a permanent magnet mechanism 11 is arranged in the middle of the right side face of the transmission mechanism box 15, and an auxiliary switch 12 is arranged at the lower left corner of the right side face of the transmission mechanism box 15. A transmission mechanism 14 is arranged in a transmission mechanism box body 15, three insulating pull rods 10 are connected to the transmission mechanism 14, and the upper ends of the insulating pull rods 10 are connected with the lower ends of solid-sealed polar columns 18 in the three tank bodies 6. A self-sealing joint 9 is arranged below the right side outside the middle tank body 6, the self-sealing joint 9 is connected with the inner cavities of the tank bodies 6 at two sides through a pipeline, and a gas detection device 8 is communicated above the self-sealing joint 9. The upper end of each insulating pull rod 10 is connected with the lower end of a solid-sealed polar pole 18, and the solid-sealed polar pole 18 is arranged in the tank body 6 which is hermetically connected with the transmission mechanism box body 15. The lower part of the left side of the solid-sealed polar pole 18 is connected with a contact finger assembly 16, the contact finger assembly 16 is connected with the right end of the umbrella skirt sleeve 17, and the upper end of the contact finger assembly 16 is provided with a conductive assembly 19. In the intermediate tank 16The upper end of be equipped with three station operating device 1 outward, three transmission case 2 is connected below three station operating device 1, and three transmission case 2 is fixed on the top face of jar body 6, and conductive seat 3 is connected respectively to three transmission case 2 below, and conductive rod 4 is connected to the below of conductive seat 3, and contact seat 21 is equipped with to the lower extreme of conductive rod 4, and the right-hand member of integral type sleeve pipe 20 is connected to the left side of contact seat 21. The miniaturized vacuum type gas insulated metal enclosed switchgear seals a vacuum circuit breaker 23, a three-station isolating/grounding switch 22 and a cable integrated sleeve 20 for entering and exiting a bus in a grounded aluminum alloy tank 6, and the tank 6 is filled with low-pressure mixed gas SF₆30%、N₂70 percent, as an insulating medium, the three phases are arranged in a straight line. Two observation windows 5 are arranged on the upper walls of the three tank bodies 6, and a grounding device 7 is arranged below the observation windows 5.

The working principle of the miniaturized vacuum type gas insulated metal enclosed switchgear is as follows: the three-station operating mechanism 1 drives three phases to synchronously link through the transmission case 2, each phase takes the three-station isolating/grounding switch 22 and the vacuum circuit breaker 23 as cores, and the three-station operating mechanism 1 provides torque through the transmission case 2 and drives the conducting rod 4 to control the on/off of the three-station isolating/grounding switch 22. The permanent magnet mechanism 11 and the auxiliary switch 12 are arranged on the transmission mechanism box body 15, and the permanent magnet mechanism 11 controls the transmission mechanism 14 to drive the vacuum circuit breaker 23 to be closed or opened.

Claims (1)

1. A miniaturized vacuum type gas insulated metal-enclosed switchgear comprises a support (13), a transmission mechanism box body (15), tank bodies (6), permanent magnetic mechanisms (11) and an auxiliary switch (12), and is characterized in that the transmission mechanism box body (15) is fixedly arranged above the support (13), the three tank bodies (6) are fixedly arranged above the transmission mechanism box body (15) in parallel, the permanent magnetic mechanisms (11) are arranged in the middle of the right side face of the transmission mechanism box body (15), the transmission mechanism (14) is arranged in the transmission mechanism box body (15), the transmission mechanism (14) is connected with three insulating pull rods (10), the upper ends of the insulating pull rods (10) are connected with the lower ends of solid-enclosed polar columns (18) in the three tank bodies (6), a self-sealing joint (9) is arranged below the right side outside the middle tank body (6), the self-sealing joint (9) is connected with the inner cavities of the tank bodies (6) on two, a gas detection device (8) is communicated and arranged above the self-sealing joint (9), the upper end of each insulating pull rod (10) is connected with the lower end of a solid-sealed polar pole (18), the solid-sealed polar poles (18) are arranged in a tank body (6) which is hermetically connected with a transmission mechanism box body (15), the lower part of the left side of each solid-sealed polar pole (18) is connected with a contact finger assembly (16), the contact finger assembly (16) is connected with the right end of an umbrella skirt sleeve (17), be equipped with electrically conductive assembly (19) in the upper end of solid utmost point post (18), be equipped with three station operating device (1) outside the upper end of intermediate tank body (6), connect three transmission case (2) below three station operating device (1), three transmission case (2) below is equipped with respectively leads electrical seat (3), lead electrical seat (3) below and connect conducting rod (4), contact seat (21) are equipped with to the lower extreme of conducting rod (4), the right-hand member of cable integral type sleeve pipe (20) is connected to the left side of contact seat (21).