CN221244567U - Electrical equipment for sulfur hexafluoride gas - Google Patents

Abstract

The utility model belongs to the technical field of sulfur hexafluoride electrical equipment, and particularly provides electrical equipment of sulfur hexafluoride gas. The electrical equipment comprises an air barrier and an electrical circulation system; the inlet end of the purifying unit is communicated with the outlet pipeline of the air barrier and is used for purifying sulfur hexafluoride gas mixed in the air barrier; the outlet end of the air supplementing unit is communicated with an inlet pipeline of the air barrier and is used for supplementing pure sulfur hexafluoride gas into the air barrier; the inlet of the first control valve is communicated with the outlet end of the purifying unit, and the outlet of the first control valve is communicated with the inlet end of the air supplementing unit so as to store purified sulfur hexafluoride gas into the air supplementing unit through the purifying unit. The utility model aims to solve the problems that the existing sulfur hexafluoride gas electric equipment can not simultaneously operate for purifying gas in the gas barrier and supplementing gas in the gas barrier, and a power supply is required to be continuously turned on and off, so that the gas treatment efficiency of the electric equipment is reduced, and the purification efficiency and the conveying efficiency of sulfur hexafluoride gas are improved.

Description

Electrical equipment for sulfur hexafluoride gas

Technical Field

The utility model belongs to the technical field of sulfur hexafluoride electrical equipment, and particularly provides electrical equipment of sulfur hexafluoride gas.

Background

With the vigorous development of the power industry, the ultra-high voltage technology is continuously applied, and the application requirements of high-voltage electric equipment are increasingly large. Sulfur hexafluoride becomes a mainstream insulating medium of high-voltage electrical equipment at present by virtue of good insulating property and firm molecular stability, and is applied to an electrical power system. In order to improve the insulation and conductivity of the power system, improving the purity of sulfur hexafluoride gas in electrical equipment is a major problem.

However, each air barrier of the existing sulfur hexafluoride electrical equipment is usually provided with an air charging and discharging interface, and the interface is the only interface which can be communicated with the outside through the air barrier. When sulfur hexafluoride gas is required to be purified, the electrical equipment is required to be powered off, then the gas in the air barrier is connected with a sulfur hexafluoride gas recovery device through an inflation-deflation interface for recovery, and after recovery is completed, the sulfur hexafluoride gas is purified through a purification system; when the gas in the electrical equipment needs to be supplemented, the air charging and discharging interface is communicated with the air supplementing system for supplementing the gas. Therefore, the electrical equipment needs to be powered off, the economic benefit of enterprises is affected, and the service life of the equipment is reduced.

Therefore, there is an urgent need for a sulfur hexafluoride electrical equipment capable of solving the above-mentioned problems and improving the gas treatment efficiency of the electrical equipment.

Disclosure of utility model

An object of the present utility model is to provide an electrical apparatus capable of on-line processing sulfur hexafluoride gas without power failure, so as to improve the gas processing efficiency of the electrical apparatus.

In order to achieve the above object, the present utility model provides an electrical apparatus for sulfur hexafluoride gas, the electrical apparatus including a gas barrier and an electrical circulation system; the electrical circulation system includes:

the inlet end of the purifying unit is communicated with the outlet pipeline of the air barrier and is used for purifying sulfur hexafluoride gas mixed in the air barrier;

The outlet end of the air supplementing unit is communicated with the inlet pipeline of the air barrier and is used for supplementing pure sulfur hexafluoride gas into the air barrier;

the inlet of the first control valve is communicated with the outlet end of the purifying unit, and the outlet of the first control valve is communicated with the inlet end of the air supplementing unit so as to store purified sulfur hexafluoride gas into the air supplementing unit through the purifying unit.

Further, the purification unit comprises a first pressure reducing valve, a second control valve, a vacuum pump, a compressor, a particle filter, a hygroscopic filter, a membrane separator and a purification gas tank which are sequentially communicated through pipelines;

And an inlet of the pressure reducing valve is communicated with an outlet of the air barrier so as to purify sulfur hexafluoride mixed gas in the air barrier through the purification unit.

Further, the air supplementing unit comprises an air supplementing tank, a third control valve and a second pressure reducing valve which are sequentially communicated through pipelines;

And the outlet of the second pressure reducing valve is communicated with the inlet of the air barrier so as to supplement pure sulfur hexafluoride gas in the air supplementing tank into the air barrier.

Further, an inlet of the first control valve is communicated with a first outlet pipeline of the purifying gas tank, and an outlet of the first control valve is communicated with an inlet pipeline of the gas supplementing tank so as to store pure sulfur hexafluoride gas purified by the purifying unit into the gas supplementing tank.

Further, the electrical equipment of sulfur hexafluoride gas further comprises a gas detection unit, wherein the gas detection unit is connected in series between the purified gas tank and the first pressure reducing valve through a pipeline and is used for detecting the purity of purified gas purified by the purified gas tank and guiding qualified sulfur hexafluoride gas after detection to the purified gas tank.

Further, the gas detection unit comprises a gas detection module and a fourth control valve which are sequentially communicated through pipelines;

And the inlet of the gas detection module is communicated with a second outlet pipeline at the bottom end of the purified gas tank, and the outlet of the fourth control valve is communicated with an outlet pipeline of the first pressure reducing valve.

Further, the position of the air barrier inlet is higher than the position of the air barrier outlet.

Further, a first check valve joint is arranged at the inlet of the air barrier and used for preventing pure sulfur hexafluoride air flow from flowing back into the air supplementing unit;

And a second check valve connector is arranged at the outlet of the air barrier and used for preventing the mixed sulfur hexafluoride gas from flowing back into the air barrier.

Further, the electric circulation system further comprises a heater arranged on one side of the air supplementing tank, and the heater is used for heating the air supplementing tank so that sulfur hexafluoride gas in the air supplementing tank is converted into liquid.

Further, any one of the purifying unit, the air supplementing unit and the gas detecting unit is provided with a one-way valve for preventing the gas in the corresponding pipeline from flowing backwards; and/or

The electrical circulation system further comprises at least one pressure detection module for detecting a pressure value within the electrical circulation system.

Based on the foregoing description, it will be appreciated by those skilled in the art that in the foregoing technical solution of the present utility model, by communicating the inlet end of the purifying unit with the outlet pipe of the air barrier, and communicating the outlet section of the air supplementing unit with the inlet pipe of the air barrier, and then communicating the inlet of the first control valve with the outlet end of the purifying unit, the outlet of the first control valve is communicated with the inlet end of the air supplementing unit, so that the purifying unit stores purified sulfur hexafluoride gas into the air supplementing unit. The utility model overcomes the defect that the prior sulfur hexafluoride gas electric equipment can not simultaneously operate for purifying gas in the gas barrier and supplementing gas in the gas barrier, and is required to be continuously powered on and powered off, thereby being extremely easy to damage the equipment and reducing the gas treatment efficiency of the electric equipment. The utility model can simultaneously purify sulfur hexafluoride gas in the air barrier and supplement pure sulfur hexafluoride gas in the air barrier, improves the purification efficiency and the conveying efficiency of the sulfur hexafluoride gas, and also avoids the problem of equipment damage caused by repeated power failure.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, some embodiments of the present utility model will be described hereinafter with reference to the accompanying drawings. It will be understood by those skilled in the art that components or portions thereof identified in different drawings by the same reference numerals are identical or similar; the drawings of the utility model are not necessarily to scale relative to each other. In the accompanying drawings:

FIG. 1 is a schematic diagram of a sulfur hexafluoride electrical equipment in accordance with some embodiments of the utility model;

FIG. 2 is a schematic diagram of the overall structure of the sulfur hexafluoride electrical equipment of FIG. 1;

FIG. 3 is a schematic diagram of a first principle of operation of the sulfur hexafluoride electrical equipment of the utility model;

fig. 4 is a schematic diagram of a second operating principle of the sulfur hexafluoride electrical equipment in the utility model.

Reference numerals illustrate:

100. an electrical device;

1. An air barrier; 11. a first check valve joint; 12. a second check valve joint;

2. An electrical circulation system;

21. A purifying unit; 211. a first pressure reducing valve; 212. a second control valve; 213. a vacuum pump; 214. a compressor; 215. a particulate filter; 216. a hygroscopic filter; 217. a membrane separator; 218. purifying the gas tank; 2181. a first safety valve; 2182. a first pressure detection module;

22. An air supply unit; 221. a gas supplementing tank; 2211. a second safety valve; 2212. a second pressure detection module; 222. a third control valve; 223. a second pressure reducing valve; 224. a heater;

23. a first control valve;

24. A gas detection unit; 241. a gas detection module; 242. a fourth control valve;

251. A first one-way valve; 252. a second one-way valve; 253. a third one-way valve; 254. a fourth one-way valve;

261. A first manual valve; 262. a second manual valve; 263. a third manual valve;

271. a third pressure detection module; 272. a fourth pressure detection module; 273. and a fifth pressure detection module.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model, and the some embodiments are intended to explain the technical principles of the present utility model and are not intended to limit the scope of the present utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments provided by the present utility model, shall still fall within the scope of protection of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships, which are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

An electrical apparatus for sulfur hexafluoride gas in some embodiments of the utility model will be described in detail with reference to fig. 1-4. Fig. 1 is a schematic structural diagram of a sulfur hexafluoride electrical equipment according to some embodiments of the utility model; FIG. 2 is a schematic diagram of the overall structure of the sulfur hexafluoride electrical equipment of FIG. 1; FIG. 3 is a schematic diagram of a first principle of operation of the sulfur hexafluoride electrical equipment of the utility model; fig. 4 is a schematic diagram of a second operating principle of the sulfur hexafluoride electrical equipment in the utility model.

It should be noted that, for convenience of description and for enabling those skilled in the art to quickly understand the technical solution of the present utility model, only the technical features that are relatively strongly related (directly related or indirectly related) to the technical problem and/or the technical concept to be solved by the present utility model will be described hereinafter, and the technical features that are relatively weakly related to the technical problem and/or the technical concept to be solved by the present utility model will not be described in detail. Since the technical features with a weak degree of association belong to common general knowledge in the art, the disclosure of the present utility model will not be insufficient even if the features with a weak degree of association are not described.

As shown in fig. 1, in some embodiments of the present utility model, an electrical apparatus 100 of sulfur hexafluoride gas is provided, the electrical apparatus 100 including an air barrier 1 and an electrical circulation system 2. The air barrier 1 comprises a plurality of independent sulfur hexafluoride air chambers which are communicated with each other in the circuit and isolated from each other in the air circuit. Because the state of the sulfur hexafluoride gas is unstable, the sulfur hexafluoride gas is easy to hydrolyze in the air barrier 1 to generate impurities such as low-valence sulfur fluoride, sulfur dioxide or hydrofluoric acid. Therefore, the purification treatment is required to be performed in the air barrier 1 to ensure the purity of sulfur hexafluoride, so as to ensure that the sulfur hexafluoride gas has better insulating property for being applied in the electric power system.

The electrical circulation system 2 comprises a purification unit 21, a make-up unit 22 and a first control valve 23. The inlet end of the purifying unit 21 is communicated with the outlet pipeline of the air barrier 1, and the purifying unit 21 is used for purifying sulfur hexafluoride gas mixed in the air barrier 1. The outlet end of the air supplementing unit 22 is communicated with the inlet pipeline of the air barrier 1, and the air supplementing unit 22 is used for supplementing pure sulfur hexafluoride gas into the air barrier 1. The inlet of the first control valve 23 is communicated with the outlet end of the purifying unit 21, and the outlet of the first control valve 23 is communicated with the inlet end of the air supplementing unit 22, so that purified sulfur hexafluoride gas is stored in the air supplementing unit 22 through the purifying unit 21. The electrical equipment 100 in the utility model can simultaneously purify sulfur hexafluoride gas mixed in the air barrier 1 and convey pure sulfur hexafluoride gas into the air barrier 1, and can also independently finish purifying sulfur hexafluoride gas mixed in the air barrier 1 and convey pure sulfur hexafluoride gas into the air barrier 1. Compared with the electrical equipment 100 in the prior art, the utility model can simultaneously carry out the process of purifying the sulfur hexafluoride gas mixed by the air barrier 1 and conveying the pure sulfur hexafluoride gas without repeated power failure, thereby improving the purifying efficiency and conveying efficiency of the sulfur hexafluoride gas and avoiding the problem of equipment damage caused by repeated power failure.

As shown in fig. 2, the purge unit 21 includes a first pressure reducing valve 211, a second control valve 212, a vacuum pump 213, a compressor 214, a particulate filter 215, a hygroscopic filter 216, a membrane separator 217, and a purge gas tank 218, which are sequentially line-connected. The inlet of the first pressure reducing valve 211 is communicated with the outlet of the air barrier 1 to purify the sulfur hexafluoride gas mixture in the air barrier 1 through the purifying unit 21.

The purge gas tank 218 is provided with a first pressure detection module 2182, and the first pressure detection module 2182 is provided on the purge gas tank 218 for monitoring a pressure value in the purge gas tank 218.

The purge tank 218 is further provided with a first safety valve 2181, and the first safety valve 2181 is used for automatically opening the pressure relief device when the pressure of the gas in the purge tank 218 exceeds a set safety threshold.

The particle filter 215 is used for filtering macromolecular impurities (with a diameter of 1nm or more) mixed in the sulfur hexafluoride gas, so as to avoid the macromolecular impurities from affecting the insulation conductivity of the sulfur hexafluoride gas. The hygroscopic filter 216 is used to filter some small molecular impurities (diameter less than 1 nm) decomposed by sulfur hexafluoride gas and adsorb micro water to avoid the small molecular impurities and micro water from affecting the insulated conductivity of sulfur hexafluoride gas. The membrane separator is configured as a hollow fiber membrane for adsorbing ultrafine particles and micro water mixed in sulfur hexafluoride gas. After multi-stage separation and purification by the particle filter 215, the moisture absorption filter 216 and the membrane separator, the purified sulfur hexafluoride gas is obtained by deep purification by the purification gas tank 218. As will be appreciated by those skilled in the art, the purge gas tank 218 has a receiving space therein for storing purified sulfur hexafluoride gas.

The air supplementing unit 22 includes an air supplementing tank 221, a third control valve 222, and a second pressure reducing valve 223, which are sequentially connected in line. The outlet of the second pressure reducing valve 223 communicates with the inlet of the air barrier 1 to replenish the purified sulfur hexafluoride gas in the replenishing tank 221 into the air barrier 1.

The second safety valve 2211 is arranged on the air supplementing tank 221, and the second safety valve 2211 is used for automatically opening the pressure relief device when the pressure of the air in the air supplementing tank 221 exceeds a set safety threshold.

The second pressure detection module 2212 is disposed on the air make-up tank 221, and is used for monitoring the pressure value in the air make-up tank 221.

In other embodiments of the present utility model, the number of the supplemental gas tanks 221 is set to be plural, and the plurality of supplemental gas tanks 221 are used for storing sulfur hexafluoride gas. The critical temperature of sulfur hexafluoride gas is 45.6 ℃, so that sulfur hexafluoride gas is easy to liquefy, and gaseous sulfur hexafluoride is easy to hydrolyze to generate micromolecular sulfur fluoride, so that the purity of sulfur hexafluoride in the gas supplementing tank 221 is reduced.

In still other embodiments of the present utility model, the electrical circulation system 2 includes a heater 224, and the heater 224 is disposed at one side of the supplementary gas tank 221 to heat the supplementary gas tank 221 to liquefy sulfur hexafluoride gas in the supplementary gas tank 221 for storage. Preferably, the heater 224 is provided at a side of the plurality of the aeration tanks 221 near the inlet of the aeration tank 221.

Further, although not shown in the drawings, in other embodiments of the utility model, the electrical circulation system 2 further includes a condenser, which is disposed on a side of the plurality of gas filling tanks 221 near the outlet, for converting the sulfur hexafluoride liquid in the liquid state of the gas filling tanks 221 into a gaseous state, so as to supplement pure sulfur hexafluoride gas into the gas barrier 1.

The first control valve 23 has an inlet and an outlet. The inlet of the first control valve 23 is communicated with a first outlet pipeline of the purge gas tank 218, and the outlet of the first control valve 23 is communicated with an inlet pipeline of the gas supplementing tank 221, so that purified sulfur hexafluoride gas purified by the purge unit 21 is stored in the gas supplementing tank 221. The first control valve 23 is configured as a solenoid valve.

In other embodiments of the utility model, the inlet of the air barrier 1 is located at a higher position than the outlet of the air barrier 1. Since the density of the bottom gas in the air barrier 1 is relatively high, impurities are easy to generate, and the bottom gas flow is led out through the outlet of the air barrier 1 so as to be purified. The pure gas stream is directed to the top of the gas stream to avoid contamination of the pure gas stream.

The inlet of the air barrier 1 is provided with a first check valve joint 11 for preventing pure sulfur hexafluoride air flow from flowing back into the air supplementing unit 22. The outlet of the air barrier 1 is provided with a second check valve joint 12 for preventing the mixed sulfur hexafluoride gas from flowing back into the air barrier 1.

Referring now to fig. 1-4, four modes of operation of electrical device 100 in some embodiments of the utility model are described:

As shown in fig. 3, in the first operation mode, the first control valve 23 and the compressor 214 are closed, so that the air supply unit 22 supplies air into the air barrier 1. The gas flow path is: make-up tank 221→third control valve 222→second pressure reducing valve 223→air barrier 1.

As shown in fig. 4, in the second operation mode, the first control valve 23 is closed, the compressor 214 is opened, and the purifying unit 21 is communicated with the air barrier 1, so that the mixed sulfur hexafluoride gas in the air barrier 1 is purified by the purifying unit 21. The airflow flow path is: air space 1, first pressure reducing valve 211, second control valve 212, vacuum pump 213, compressor 214, particulate filter 215, hygroscopic filter 216, membrane separator 217, and purge tank 218.

As shown in fig. 1 and 2, in the third working mode, the first control valve 23 is closed, the compressor 214 is opened, the purifying unit 21 is communicated with the air barrier 1, and the air supplementing unit 22 is communicated with the air barrier 1, so that the air supplementing unit 22 can supplement pure sulfur hexafluoride gas to the air barrier 1, and the purifying unit 21 can purify and purify the mixed hexafluoro gas in the air barrier 1. The gas flow path is two paths, including the flow paths in the first working mode and the second working mode, and the two paths are not communicated but respectively and simultaneously run.

With continued reference to fig. 1 and fig. 2, in the fourth working mode, the first control valve 23 is opened, the compressor 214 is opened, so that the air barrier 1, the purifying unit 21 and the air supplementing unit 22 are sequentially communicated end to end, so that the purifying unit 21 can purify the mixed sulfur hexafluoride gas in the air barrier 1, the purified sulfur hexafluoride gas is stored in the air supplementing unit 22 after being purified, and then the stored purified sulfur hexafluoride gas is conveyed into the air barrier 1 by the air supplementing unit 22. The gas flow path is: air space 1, first pressure reducing valve 211, second control valve 212, vacuum pump 213, compressor 214, particulate filter 215, hygroscopic filter 216, membrane separator 217, purge tank 218, first control valve 23, make-up tank 221, third control valve 222, second pressure reducing valve 223, air space 1.

In still other embodiments of the present utility model, the electrical circulation system 2 further includes a gas detection unit 24, where the gas detection unit 24 is connected in series between the purge gas tank 218 and the first pressure reducing valve 211 through a pipeline, and is used for detecting purity of the purified gas after the purge gas tank 218 is purged, and guiding the sulfur hexafluoride gas qualified after the detection to the purge gas tank 218.

The gas detection unit 24 includes a gas detection module 241 and a fourth control valve 242 in sequential piping communication. Preferably, the inlet of the gas detection module 241 is communicated with the second outlet pipe at the bottom end of the purge gas tank 218, so that the gas detection module 241 can detect sulfur fluoride gas at the bottom of the purge gas tank 218, and since the gas concentration at the bottom of the purge gas tank 218 is relatively higher than that at the top, the second outlet is preferentially arranged at the bottom of the purge gas tank 218, and sulfur hexafluoride gas at the second outlet at the bottom is detected, so that the true and effective gas detection result is ensured. An outlet of the fourth control valve 242 communicates with an outlet conduit of the first pressure reducing valve 211.

The detection process of the gas detection unit 24 in this embodiment is: the gas detection module 241 detects pure sulfur hexafluoride gas at the bottom of the purge gas tank 218, and if the detection is qualified, the sulfur hexafluoride gas after the detection is passed through the vacuum pump 213, the compressor 214, the particle filter 215, the hygroscopic filter 216, the membrane separator and the purge gas tank 218 for purification, so as to prevent the gas from being polluted in the detection pipeline. If the sulfur hexafluoride gas is detected to be unqualified, guiding the unqualified sulfur hexafluoride gas to the purifying gas tank 218, and controlling the purifying gas tank 218 to continuously purify all sulfur hexafluoride gas in the purifying gas tank 218 until the sulfur hexafluoride gas in the gas detection module 241 is detected to be qualified.

The gas detection module 241 detects whether impurities, compounds decomposed by sulfur hexafluoride, micro water, or the like exist in the purified sulfur hexafluoride gas.

Any one of the purifying unit 21, the air supplementing unit 22 and the gas detecting unit 24 is provided with a check valve for preventing the gas in the corresponding pipe from flowing back. Specifically, the first check valve 251 is disposed in the purifying unit 21, the first check valve 251 is disposed between the first pressure reducing valve 211 and the vacuum pump 213, and the first check valve 251 is used to prevent the air flow from the inside of the air barrier 1 via the first pressure reducing valve 211 from flowing back to the air barrier 1, so as to pollute the sulfur hexafluoride gas in the air barrier 1. The air supplementing unit 22 is provided with a second one-way valve 252, the second one-way valve 252 is arranged between the first control valve 23 and the air supplementing tank 221, and the second one-way valve 252 is used for preventing purified sulfur hexafluoride gas purified in a pipeline from flowing back to the purifying unit 21, so that the purifying unit 21 cannot timely supplement the purified sulfur hexafluoride gas to the air supplementing tank 221, and the gas circulation efficiency of the electrical equipment 100 is reduced. The gas detection unit 24 is provided with a third check valve 253, and the third check valve 253 is disposed between the gas detection module 241 and the second control valve 212, where the third check valve 253 is used for preventing the sulfur hexafluoride gas passing through the gas detection module 241 from flowing back to the purge gas tank 218, so as to pollute the pure sulfur hexafluoride gas in the purge gas tank.

Preferably, a fourth one-way valve 254 is disposed between the purifying unit 21 and the air supplementing unit 22, and the fourth one-way valve 254 is used for preventing the pure sulfur hexafluoride gas at the outlet end of the purifying unit 21 from flowing back into the purifying unit 21, thereby reducing the conveying efficiency of the sulfur hexafluoride gas.

Because the pressure intensity in the electric circulation system 2 is larger, the electric circulation system 2 is further provided with a manual valve in turn, so that a user can move the manual valve in time to stop the operation of the electric circulation system 2 when the accident happens. Specifically, the manual valves include a first manual valve 261, a second manual valve 262, and a third manual valve 263. The first manual valve 261 is provided in the purge unit 21 between the pressure reducing valve and the vacuum pump 213, and an operator can break the first manual valve 261 to connect/disconnect the pipe between the air barrier 1 and the purge unit 21. The second manual valve 262 is provided between the purge unit 21 and the air supply unit 22 between the first control valve 23 and the air supply tank, and an operator can pull the second manual valve 262 so that the purge unit 21 can be connected/disconnected to/from a pipe between the air supply unit 22. The third manual valve 263 is provided in the air supply unit 22 between the air supply tank and the air barrier 1, and an operator can pull the third manual valve 263 so that the pipe between the air supply tank and the air barrier 1 communicates.

Because all the pipelines in the electrical circulation system 2 have gas flowing, in order to ensure the safe operation of the whole electrical circulation, the utility model is provided with a plurality of pressure detection modules in the electrical circulation system 2 for detecting the pressure value of the corresponding pipeline, so that operators can monitor whether the pressure of the whole equipment is at a safe threshold value at any time, and the safe operation of the production process is ensured. Specifically, the electrical circulation system 2 further comprises at least one pressure detection module for detecting a pressure value within the electrical circulation system 2. Further specifically, the purifying unit 21 includes a third pressure detecting module 271, where the third pressure detecting module 271 is disposed between the first pressure reducing valve 211 and the vacuum pump 213, and is configured to detect whether the pressure of the air flow in the first piece of the pressure pump is at a safety threshold, and to protect the compressor 214 and the vacuum pump 213 while ensuring production safety, and to avoid damage to the vacuum pump 213 and the compressor 214 caused by excessive air flow pressure. A fourth pressure detection module 272 is arranged between the purifying unit 21 and the air supplementing unit 22, and is used for monitoring the pressure value of the outlet end of the purifying unit 21. The purge unit 21 includes a fifth pressure detection module 273, and the fifth pressure detection module 273 is disposed between the make-up tank 221 and the second pressure reducing valve 223, for monitoring the pressure value at the outlet end of the make-up tank 221.

As will be appreciated by those skilled in the art, the present utility model enables the purifying unit 21 to store purified sulfur hexafluoride gas into the air supplementing unit 22 by communicating the inlet end of the purifying unit 21 with the outlet pipe of the air barrier 1, communicating the outlet section of the air supplementing unit 22 with the inlet pipe of the air barrier 1, and communicating the inlet of the first control valve 23 with the outlet end of the purifying unit 21, and communicating the outlet of the first control valve 23 with the inlet end of the air supplementing unit 22. The utility model overcomes the defect that the prior sulfur hexafluoride gas electric equipment 100 can not simultaneously operate for purifying the gas in the gas barrier 1 and supplementing the gas in the gas barrier 1, and is required to be continuously powered on and powered off, thereby being extremely easy to damage the equipment and reducing the gas treatment efficiency of the electric equipment 100. The utility model can simultaneously purify sulfur hexafluoride gas in the air barrier 1 and supplement pure sulfur hexafluoride gas in the air barrier 1, thereby effectively improving the gas treatment efficiency.

Thus far, the technical solution of the present utility model has been described in connection with the foregoing embodiments, but it will be readily understood by those skilled in the art that the scope of the present utility model is not limited to only these specific embodiments. The technical solutions in the above embodiments can be split and combined by those skilled in the art without departing from the technical principles of the present utility model, and equivalent changes or substitutions can be made to related technical features, so any changes, equivalent substitutions, improvements, etc. made within the technical principles and/or technical concepts of the present utility model will fall within the protection scope of the present utility model.

Claims (10)

1. An electrical device for sulfur hexafluoride gas, wherein the electrical device includes an air barrier and an electrical circulation system; the electrical circulation system includes:

the inlet end of the purifying unit is communicated with the outlet pipeline of the air barrier and is used for purifying sulfur hexafluoride gas mixed in the air barrier;

The outlet end of the air supplementing unit is communicated with the inlet pipeline of the air barrier and is used for supplementing pure sulfur hexafluoride gas into the air barrier;

the inlet of the first control valve is communicated with the outlet end of the purifying unit, and the outlet of the first control valve is communicated with the inlet end of the air supplementing unit so as to store purified sulfur hexafluoride gas into the air supplementing unit through the purifying unit.

2. The electrical equipment for sulfur hexafluoride gas of claim 1 wherein,

The purification unit comprises a first pressure reducing valve, a second control valve, a vacuum pump, a compressor, a particle filter, a moisture absorption filter, a membrane separator and a purification gas tank which are sequentially communicated through pipelines;

And an inlet of the pressure reducing valve is communicated with an outlet of the air barrier so as to purify sulfur hexafluoride mixed gas in the air barrier through the purification unit.

3. An electrical apparatus for sulfur hexafluoride gas, as claimed in claim 2, characterized in that,

The air supplementing unit comprises an air supplementing tank, a third control valve and a second pressure reducing valve which are sequentially communicated through pipelines;

And the outlet of the second pressure reducing valve is communicated with the inlet of the air barrier so as to supplement pure sulfur hexafluoride gas in the air supplementing tank into the air barrier.

4. An electrical device for sulfur hexafluoride gas, as claimed in claim 3, characterized in that,

The inlet of the first control valve is communicated with a first outlet pipeline of the purifying gas tank, and the outlet of the first control valve is communicated with an inlet pipeline of the gas supplementing tank so as to store pure sulfur hexafluoride gas purified by the purifying unit into the gas supplementing tank.

5. The electrical device for sulfur hexafluoride gas of claim 2 further comprising:

The gas detection unit is connected in series between the purified gas tank and the first pressure reducing valve through a pipeline and is used for detecting the purity of the purified gas purified by the purified gas tank and guiding the qualified sulfur hexafluoride gas after detection to the purified gas tank.

6. The electrical equipment for sulfur hexafluoride gas of claim 5, wherein,

The gas detection unit comprises a gas detection module and a fourth control valve which are sequentially communicated through pipelines;

And the inlet of the gas detection module is communicated with a second outlet pipeline at the bottom end of the purified gas tank, and the outlet of the fourth control valve is communicated with an outlet pipeline of the first pressure reducing valve.

7. The electrical equipment for sulfur hexafluoride gas of claim 1 wherein,

The position of the air barrier inlet is higher than that of the air barrier outlet.

8. The electrical equipment for sulfur hexafluoride gas of claim 7, wherein,

A first check valve joint is arranged at the inlet of the air barrier and used for preventing pure sulfur hexafluoride air flow from flowing back into the air supplementing unit;

And a second check valve connector is arranged at the outlet of the air barrier and used for preventing the mixed sulfur hexafluoride gas from flowing back into the air barrier.

9. An electrical device for sulfur hexafluoride gas, as claimed in claim 3, characterized in that,

The electric circulation system further comprises a heater arranged on one side of the air supplementing tank, and the heater is used for heating the air supplementing tank so that sulfur hexafluoride gas in the air supplementing tank is converted into liquid.

10. The electrical equipment for sulfur hexafluoride gas of claim 5, wherein,

Any one of the purifying unit, the air supplementing unit and the gas detecting unit is provided with a one-way valve for preventing the gas in the corresponding pipeline from flowing backwards; and/or

The electrical circulation system further comprises at least one pressure detection module for detecting a pressure value within the electrical circulation system.