CN202178199U - High pressure vacuum circuit breaker suitable for fixed type inflatable cabinet - Google Patents

Abstract

The utility model relates to a high-voltage vacuum circuit breaker suitable for a fixed gas-filled cabinet, comprising a box body with a circuit breaker operating mechanism inside, and a solid-sealed pole connected to the circuit breaker operating mechanism, and is characterized in that: the outside of the box body A mounting plate is provided for assembling the solid-sealed poles and is also used for connecting with the fixed inflatable cabinet. The mounting plate is provided with a mounting hole connected with the fixed inflatable cabinet. Compared with the prior art, the utility model has the advantages of providing a high-voltage vacuum circuit breaker that can be used in a fixed gas-filled cabinet, making it possible to design and manufacture an indoor high-voltage gas-filled switchgear, so that it can be greatly reduced The volume of the solid-sealed pole and the high-voltage switchgear reduces the floor area of the entire substation (substation), which is extremely beneficial to some modern big cities where land is very expensive.

Description

A high-voltage vacuum circuit breaker suitable for fixed gas-filled cabinets

technical field

The utility model relates to a high-voltage vacuum circuit breaker, in particular to a high-voltage vacuum circuit breaker suitable for a fixed gas-filled cabinet.

Background technique

In the existing high-voltage vacuum circuit breaker, under normal circumstances, the interior of the vacuum interrupter is in a high vacuum state. Since the high vacuum has excellent insulation performance, and the interior of the interrupter is not affected by the external environmental conditions, the static and dynamic The distance between the contacts can be made very small to reliably cut off the high-voltage current. That is to say, the vacuum interrupter can be made into a smaller volume. However, the conductors outside the arc extinguishing chamber are still directly exposed to the air, and the insulation performance of the air is poor, and it is also greatly affected by the external use conditions, so the distance between the phases of the conductors and the ground is also large, making The volume of circuit breakers and switch cabinets cannot be effectively reduced, and the superiority of vacuum interrupters cannot be better reflected. Especially when the operating environment of the circuit breaker is poor, such as high altitude, high air humidity, and serious pollution of dust and corrosive substances in the air, the insulation strength of the circuit breaker and switchgear will continue to decrease or even fail completely. hidden dangers.

The high-voltage inflatable cabinet is to place the entire primary conductive part of the circuit breaker (including the vacuum interrupter) in a sealed box, then pump out the air in the box to make it reach a certain degree of vacuum, and finally inject it with a mixture of specific proportions. Mixed gas of N2 and SF6. Because the mixed gas has excellent insulation performance, and all the conductive parts are in the sealed box, it will not be affected by the environmental conditions of use, so it can effectively reduce the volume of circuit breakers and switchgears, and can also be well eliminated. The hidden danger of insulation strength reduction or failure due to poor environmental conditions.

However, there is no high-voltage vacuum circuit breaker structure suitable for high-voltage gas-filled cabinets at present.

Utility model content

The technical problem to be solved by the utility model is to provide a high-voltage vacuum circuit breaker suitable for a fixed gas-filled cabinet in view of the above-mentioned technical situation.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: the high-voltage vacuum circuit breaker suitable for fixed gas-filled cabinets includes a box body with a circuit breaker operating mechanism inside, and a solid-sealed pole connected to the circuit breaker operating mechanism. It is characterized in that: the outside of the box is provided with a mounting plate for assembling the solid-sealed pole and connecting with the fixed inflatable cabinet, and the mounting plate is provided with a mounting hole connected with the fixed inflatable cabinet.

As an improvement, a layer of gasket is provided between the mounting plate and the solid-sealed pole, which can be used to ensure the sealing effectiveness of the sealed box of the high-pressure inflatable cabinet.

As a further improvement, the operating mechanism of the circuit breaker is connected to the insulating pull rod of the solid-sealed pole through a connecting rod, and a skeleton sealing ring is provided at the contact part between the connecting rod and the box body. It can be used to prevent gas leakage when the operating mechanism of the circuit breaker is operating, so as to ensure the sealing effectiveness of the sealed box of the high-pressure inflatable cabinet.

Compared with the prior art, the utility model has the advantages of providing a high-voltage vacuum circuit breaker that can be used in a fixed gas-filled cabinet, making it possible to design and manufacture an indoor high-voltage gas-filled switchgear, so that it can be greatly reduced The volume of solid-sealed poles and high-voltage switchgear can reduce the footprint of the entire substation (substation), which is extremely beneficial to some modern big cities; secondly, due to the primary conductive parts and insulating parts of high-voltage vacuum circuit breakers They are all placed in a sealed box and filled with N2+SF6 mixed gas to protect them from the influence of external environmental conditions, coupled with the advancement of modern high-voltage vacuum circuit breakers and high-voltage switchgear design, manufacturing, control, and testing technologies and Improvement provides the possibility to realize the maintenance-free process of high-voltage vacuum circuit breakers and high-voltage switchgear during use, which can greatly reduce the user's use cost in the entire product life cycle.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the high-voltage vacuum circuit breaker in the embodiment of the utility model.

Fig. 2 is a schematic structural diagram of an indoor high-voltage fixed gas-filled cabinet with a high-voltage vacuum circuit breaker in the embodiment of the present invention.

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

The high-voltage vacuum circuit breaker shown in Figure 1 includes a box body 8 with a circuit breaker operating mechanism 1 inside, and an embedded pole 7 connected to the circuit breaker operating mechanism 1, wherein the circuit breaker operating mechanism 1 and the embedded pole 7 The insulating pull rods 6 are connected through a connecting rod 2, and a mounting plate 4 for assembling the solid-sealed pole 7 is arranged on the outside of the box body 8, and is also connected with the fixed inflatable cabinet. The mounting plate 4 is provided with a The installation hole 41 for the connection of the fixed inflatable cabinet; a layer of sealing gasket 5 is arranged between the installation plate 4 and the solid-sealed pole 7;

The indoor high-voltage fixed inflatable cabinet with the above-mentioned high-voltage vacuum circuit breaker is adopted, including a low-voltage control room 1-1, which is equipped with a protection and control unit. The moving mechanism 1 is fixedly installed here, and is equipped with a three-position isolating switch operating mechanism 1-11 at the same time. The right side of the operating mechanism room 1-10 is the sealed box 1-3. The sealed box 1-3 is vacuumed and filled with N2+SF6 mixed gas. All primary conductive parts of the high-voltage circuit (including the main bus 1-2 and the connection The bushing, the three-position isolating switch 1-4, the solid-sealed pole 7 of the vacuum circuit breaker and the primary conductive part of the current transformer 1-6) are all installed here for protection. Below the operating mechanism room 1-10 is a high-voltage cable room 1-8, and the switch cabinet is connected to the power grid and electrical appliances through the sequence incoming and outgoing cables 1-7.

Claims (3)

1. high-pressure vacuum breaker that is applicable to fixed inflation cabinet; The casing of circuit breaker operation mechanism is set in comprising; The pole that is connected with circuit breaker operation mechanism; It is characterized in that: said casing arranged outside has and one is used for assembling pole, also uses the mounting panel that is connected with fixed inflation cabinet simultaneously, and this mounting panel is provided with the installing hole that is connected with fixed inflation cabinet.

2. the high-pressure vacuum breaker that is applicable to fixed inflation cabinet according to claim 1 is characterized in that: be provided with one deck sealing gasket between said mounting panel and the said pole.

3. the high-pressure vacuum breaker that is applicable to fixed inflation cabinet according to claim 1 and 2; It is characterized in that: link to each other through a connecting rod between the insulated tension pole of said circuit breaker operation mechanism and said pole, this connecting rod and said casing contact site are provided with backbone sealing ring.

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