CN104876189A - A kind of SF6 gas online purification device of electric SF6 circuit breaker and its application method - Google Patents

Abstract

The present invention relates to an SF ₆ gas online purification device for an electric SF ₆ circuit breaker and a method for _using the _same . Circulation pump, a SF ₆ gas purification tower, a buffer tank, inflatable pipe, inflatable connecting pipe and exhaust pipe; through the purification adsorbent contained in the SF ₆ gas purification tower in the online purification device, the circulating SF ₆ circuit breaker SF ₆ gas For purification treatment, a pressure sensor is installed to monitor the pressure value of SF ₆ gas in the device throughout the process, and the control module controls the operation of the frequency conversion circulating pump and inflatable solenoid valve in the purification device to prevent the pressure of SF ₆ gas from being too high or too low Or the phenomenon of turbulent flow and impact is formed, which ensures the insulation inside the electric SF ₆ circuit breaker and the arc extinguishing and cooling functions during the switching action, and realizes the online purification of the SF ₆ gas in the electric SF ₆ circuit breaker without power failure.

Description

A kind of SF6 gas online purification device of electric SF6 circuit breaker and its application method

technical field

The invention belongs to the field of SF ₆ gas purification devices for electric SF ₆ circuit breakers, in particular to an SF ₆ gas online purification device for electric SF ₆ circuit breakers and a method for using the same.

Background technique

The method of purifying SF ₆ gas in the traditional electric SF ₆ circuit breaker is widely used now, and online purification cannot be performed. Instead, the power SF ₆ circuit breaker must be shut down and out of operation, and the SF ₆ gas inside the SF ₆ circuit breaker must be evacuated and then recharged. Pure nitrogen is stored, and the extracted SF ₆ gas is pumped to a special purification treatment device for purification treatment. After the treatment is qualified, the nitrogen of the SF ₆ circuit breaker stored in nitrogen gas is first emptied, vacuumed, injected with SF ₆ for flushing, and then vacuumed, and then Filling with SF ₆ for flushing, then vacuuming, and then injecting SF ₆ gas to the rated pressure for multiple cycles of vacuuming, filling gas and a series of tedious processes can be completed.

Contents of the invention

In view of this, the purpose of the present invention is to provide a kind of electric power SF ₆ circuit breaker SF ₆ gas online purification device and using method thereof, through the purifying sorbent contained in the SF ₆ gas purification tower inside the online purification device to the circulating SF ₆ break circuit Purify the SF ₆ gas in the circuit breaker, and realize the online purification process for the SF ₆ gas in the power SF ₆ circuit breaker without power failure.

The present invention adopts the following schemes to realize: an online purification device for SF gas of a power SF ₆ circuit breaker, including a power SF ₆ circuit breaker and an online purification device, and the online purification device includes a vacuum pump device, a SF _{6 gas} cylinder, and a frequency conversion Circulation pump, a SF ₆ gas purification tower, a buffer tank, inflatable pipe, inflatable connecting pipe and exhaust pipe; the vacuum pump device includes a vacuum pump and a vacuum pipe connected thereto, in order to vacuumize the online purification device, so One end of the vacuum tube connected to the vacuum pump is provided with a vacuum valve, and the other end of the vacuum tube is connected to the inflation tube; the inlet of the frequency conversion circulating pump is connected to the suction tube, and the suction tube is connected to the frequency conversion One end of the circulation pump is provided with a circulation pump inlet valve, and the other end of the air extraction pipe is connected to the electric power _SF6 circuit breaker; the outlet of the frequency conversion circulation pump is connected with the mouth of the _SF6 gas cylinder through an air delivery pipe To one end of the SF ₆ gas purification tower, the bottle mouth of the SF ₆ gas cylinder is connected to the air delivery pipe of the SF ₆ gas purification tower, and an SF ₆ gas cylinder decompression valve and gas supply valve are arranged in turn, and the The outlet of the variable frequency circulation pump is connected to the _SF6 gas purification tower on the gas delivery pipe is provided with a circulation pump outlet valve _; the other end of the SF gas purification tower is connected to the inlet of the buffer tank by the gas delivery pipe, the buffer The outlet of the tank is connected with the inflation pipe, and one end of the inflation pipe connected to the buffer tank is sequentially provided with an inflation solenoid valve, a safety valve and an inflation pipe deflation valve, and the other end of the inflation pipe passes through the The gas manifold is connected to the electrical SF ₆ circuit breaker.

Further, the electric SF ₆ circuit breaker includes a SF ₆ circuit breaker body, SF ₆ gas inside the SF ₆ circuit breaker, a pressure sensor, an intake valve and an air release valve; an opening of the SF ₆ circuit breaker body is set There is the air intake valve, the air intake valve is connected to the charging connecting pipe of the online purification device, the other opening of the SF ₆ circuit breaker body is provided with the air release valve, and the air release valve is The valve is connected to the exhaust pipe of the online purification device; the pressure sensor is arranged on the SF ₆ circuit breaker to collect the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker.

Further, the SF ₆ gas cylinder is filled with high-purity SF ₆ gas, which is used to flush the pipelines and equipment in the online purification device so that the device is filled with high-purity SF ₆ gas.

Further, the online purification device also includes a control module, one end of the control module is electrically connected to the pressure sensor in the electric _SF6 circuit breaker, and the other end of the control module is connected to the online purification device The frequency conversion circulation pump and the inflation solenoid valve are used to control the output value of the frequency conversion circulation pump and the opening degree of the inflation solenoid valve.

Further, the control module is a PLC processor or a microcomputer processor.

Preferably, the SF ₆ gas purification tower is filled with an adsorbent, and the adsorbent can adsorb moisture and harmful impurities contained in the medium gas in the SF ₆ gas.

The present invention adopts following method to realize: a kind of use method of electric _SF6 circuit breaker _SF6 gas online purification device, comprises the following steps:

Step S1: Open the vacuum valve, the inflation solenoid valve, the inlet valve of the circulation pump, and the outlet valve of the circulation pump; open the vacuum pump to vacuumize the pipelines and equipment in the online purification device;

Step S2: After the online purification device is vacuumed, close the vacuum valve and the vacuum pump;

Step S3: opening the SF ₆ gas cylinder, the SF ₆ gas cylinder decompression valve and the air supply valve, and flushing the pipeline and equipment in the online purification device;

Step S4: Judging whether the online purification device is filled with high-purity _SF6 gas, if the device is not filled with high-purity _SF6 gas, return to step S3 to continue flushing, if the device is filled with high-purity _SF6 gas, then close SF ₆ gas cylinder, SF ₆ gas cylinder decompression valve and air supply valve, enter step S5;

Step S5: After judging and confirming that the vacuum valve and the vacuum pump are closed, open the SF ₆ gas cylinder, the pressure reducing valve of the SF ₆ gas cylinder and the air supply valve, and adjust the pressure value of the pressure reducing valve and the pressure value inside the SF ₆ circuit breaker. The pressure value of the SF ₆ gas is equal, when the online purification device is filled with the high-purity SF ₆ gas with the same pressure value in the SF ₆ circuit breaker, close the SF ₆ gas cylinder, the pressure reducing valve of the SF ₆ gas cylinder and the gas supply valve ;

Step _S6 : open the air intake valve and air release valve of the electric _SF6 circuit breaker and the frequency conversion circulation pump in the online purification device;

Step S7: The SF ₆ gas inside the SF ₆ circuit breaker in the electric SF ₆ circuit breaker enters the frequency conversion circulation pump through the air release valve and the suction pipe through the circulation pump inlet valve, and the SF ₆ gas is circulated by the frequency conversion After the pump is pressed out, enter the _SF6 gas purification tower through the circulation pump outlet valve and the gas delivery pipe;

Step S8: the adsorbent contained in the _SF6 gas purification tower, the adsorbent can absorb the moisture and harmful impurities entrained by the _SF6 gas entering the _SF6 gas purification tower, and purify the _SF6 gas;

Step S9: the _SF gas purified by the adsorbent in the step S8 enters the buffer tank, and the buffer tank reduces the fluctuation of the pressure value of the SF gas, and keeps the pressure value of the _SF gas in the online purification device stable _;

Step S10: The SF ₆ gas in the buffer tank enters the SF _{6 circuit breaker through the inflation solenoid valve, the inflation pipe deflation valve, the inflation pipe, the inflation connecting pipe and the inlet valve of the SF 6 circuit} breaker in sequence, and closes the circuit The air intake valve and air release valve of the SF ₆ circuit breaker and the frequency conversion circulation pump in the online purification device complete the purification cycle.

Further, the online purification device also includes a control module, one end of the control module is electrically connected to the pressure sensor in the electric _SF6 circuit breaker, and the other end of the control module is connected to the online purification device The variable frequency circulating pump and the charging solenoid valve are used to control the output value of the variable frequency circulating pump and the opening degree of the charging solenoid valve; the control module collects the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker, when the SF ₆ When the pressure value of the SF ₆ gas inside the circuit breaker is less than the set value, the control module controls the frequency conversion circulation pump to increase the output, and at the same time increases the opening degree of the inflatable solenoid valve; when the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker When the value is greater than the set value, the control module controls the frequency conversion circulating pump to reduce the output, and at the same time reduces the opening degree of the inflation solenoid valve.

Further, when the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker collected by the control module exceeds the set gas safety pressure value, the safety valve is activated to release pressure.

Further, when the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker collected by the control module is less than the set gas minimum pressure value, the SF ₆ gas cylinder, pressure reducing valve and gas supply valve are opened, and the The high-purity SF ₆ gas in the SF ₆ gas cylinder is sent into the inside of the SF ₆ circuit breaker, and when the pressure value of the SF ₆ gas collected by the control module in the SF ₆ circuit breaker reaches the set minimum gas pressure value, it shuts off The SF ₆ gas cylinder, pressure reducing valve and gas supply valve.

Preferably, during the SF ₆ gas purification process of the online purification device, the SF ₆ gas can be sampled to determine whether the SF ₆ gas purification is qualified; when the SF ₆ gas is purified to be qualified, close the intake valve of the electric SF ₆ circuit breaker and the deflation valve, close the variable frequency circulating pump, and open the deflation valve of the inflation pipe on the inflation pipe at the same time to exhaust the gas in the pipeline and equipment in the online purification device.

Compared with the prior art, the present invention has the following beneficial effects: the present invention purifies the circulating SF ₆ circuit breaker SF ₆ gas through the purification adsorbent contained inside the SF ₆ gas purification tower in the online purification device, and the pressure sensor controls the system The pressure is monitored throughout the process, and the real-time pressure value is transmitted to the control module. The control module controls the work of the frequency conversion circulating pump and the inflation solenoid valve in the purification system through pre-designed programming, and always maintains a pressure slightly higher than the internal SF ₆ air pressure of the electric SF ₆ circuit breaker. Inflate to the inside of the SF ₆ switch, and relieve the cycle treatment, which will not cause the SF ₆ gas pressure inside the SF ₆ circuit breaker to be too high, too low, or form turbulence, impact, etc. due to uncontrollable inflation and discharge pressure Phenomenon, to ensure the insulation inside the electric _SF6 circuit breaker and the arc extinguishing and cooling functions during the switch action, and to realize the on-line purification treatment of the _SF6 medium in the electric _SF6 circuit breaker without power failure. The present invention is widely used in traditional electric power Compared with SF ₆ circuit breaker SF ₆ gas online purification device, it has great advantages.

Description of drawings

Fig. 1 is a structural schematic diagram of an SF ₆ gas online purification device for a power SF ₆ circuit breaker in the present invention.

Fig. 2 is a working flow chart of vacuuming of an SF ₆ gas online purification device for an electric SF ₆ circuit breaker in the present invention.

Fig. 3 is a work flow diagram of the SF ₆ gas on-line purification device in the electric SF ₆ circuit breaker in the present invention for the online circulation and purification of SF ₆ gas in the SF ₆ circuit breaker.

Explanation of labels: 1 is the frequency conversion circulating pump; 2 is the outlet valve of the circulating pump; 3 is the SF ₆ gas purification tower; 4 is the buffer tank; 5 is the inflatable solenoid valve; 6 is the safety valve; Pressure sensor; 9 is the intake valve; 10 is the SF ₆ circuit breaker body; 11 is the air release valve; 12 is the vacuum pump; 13 is the vacuum valve; 14 is the inlet valve of the circulation pump; 15 is the SF ₆ cylinder; 16 is the decompression Valve; 17 is an air supply valve; 18 is an inflatable connecting pipe; 19 is an exhaust pipe; 20 is a vacuum pipe; 21 is the SF ₆ gas inside the circuit breaker; 22 is an inflatable pipe.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described.

As shown in Figure 1, a kind of electric power _SF6 circuit breaker _SF6 gas on-line purification device provided by the present embodiment comprises electric power _SF6 circuit breaker and on-line purification device, and described on-line purification device comprises a vacuum pump device, an _SF6 gas Bottle 15, a frequency conversion circulation pump 1, a SF ₆ gas purification tower 3, a surge tank 4, inflation pipe 22, inflation connection pipe 18 and exhaust pipe 19; Described vacuum pump device comprises vacuum pump 12 and the vacuum pipe 20 that links to each other with it, uses To vacuumize the online purification device, one end of the vacuum tube 20 connected to the vacuum pump 12 is provided with a vacuum valve 13, and the other end of the vacuum tube 20 is connected to the inflation tube 22; 1 is connected to the inlet of the suction pipe 19, and one end of the suction pipe 19 connected to the variable frequency circulation pump 1 is provided with a circulation pump inlet valve 14, and the other end of the suction pipe 19 is connected to the electric power SF ₆ disconnection device; the outlet of the frequency conversion circulating pump 1 and the bottleneck of the SF ₆ gas cylinder 15 are all connected to an end of the SF ₆ gas purification tower 3 by an air delivery pipe, and the bottleneck of the SF ₆ gas cylinder 15 is connected to An SF gas cylinder decompression valve ₁₆ and gas supply valve 17 are arranged successively on the gas delivery pipe of the SF gas purification tower ₃ , and the outlet of the frequency conversion circulation pump 1 is connected to the gas delivery pipe of the SF gas purification tower ₁₅ A circulating pump outlet valve 2 is arranged on it; the other end of the SF ₆ gas purification tower 15 is connected to the inlet of the buffer tank 4 by a gas delivery pipe, and the outlet of the buffer tank 4 is connected with the inflation pipe 22, the One end of the inflation pipe 22 connected to the buffer tank 4 is provided with an inflation solenoid valve 5, a safety valve 6 and an inflation pipe deflation valve 7 in sequence, and the other end of the inflation pipe 22 is connected to the The electric SF ₆ circuit breaker.

In this embodiment, the electric SF ₆ circuit breaker includes a SF ₆ circuit breaker body 10, SF ₆ gas 21 inside the SF ₆ circuit breaker, a pressure sensor 8, an intake valve 9 and an air discharge valve 11; the SF ₆ One opening of the circuit breaker body 10 is provided with the air intake valve 9, which is connected to the charging connecting pipe 18 of the online purification device, and the other opening of the SF ₆ circuit breaker body 10 is The air release valve 11 is provided, and the air release valve 11 is connected to the exhaust pipe 19 of the online purification device; the pressure sensor 8 is arranged on the SF ₆ circuit breaker to collect the SF ₆ circuit breaker The pressure value of the SF ₆ gas 21 inside.

In this embodiment, the SF ₆ gas cylinder 15 is filled with high-purity SF ₆ gas, which is used to flush the pipelines and equipment in the online purification device so that the device is filled with high-purity SF ₆ gas.

In this embodiment, the online purification device further includes a control module, one end of the control module is electrically connected to the pressure sensor 8 in the electric _SF6 circuit breaker, and the other end of the control module is connected to the The variable frequency circulating pump 1 and the charging solenoid valve 5 in the online purification device are used to control the output value of the variable frequency circulating pump and the opening degree of the charging solenoid valve.

In this embodiment, the control module is a PLC processor or a microcomputer processor.

In this embodiment, when the SF ₆ gas inside the electric SF ₆ circuit breaker is damp, or after a long period of frequent switching, the high-temperature arc causes the SF ₆ gas inside the circuit breaker to decompose into harmful gas, and when the content exceeds a certain level, it is necessary to open the circuit The SF ₆ medium in the device is purified.

In the present embodiment, as shown in Figure 2, a method for using an electric _SF6 circuit breaker _SF6 gas online purification device comprises the following steps:

Step S1: Open the vacuum valve 13, the inflation solenoid valve 5, the circulation pump inlet valve 14 and the circulation pump outlet valve 2; open the vacuum pump 12 to vacuumize the pipelines and equipment in the online purification device;

Step S2: After the online purification device is vacuumed, close the vacuum valve 13 and the vacuum pump 12;

Step S3: Open the SF ₆ gas cylinder 15, the SF ₆ gas cylinder decompression valve 16 and the gas supply valve 17, and flush the pipelines and equipment in the online purification device;

Step S4: Judging whether the online purification device is filled with high-purity SF ₆ gas, if the device is not filled with high-purity SF ₆ gas, then return to step S3 to continue flushing, if the device is filled with high-purity SF ₆ gas, then close SF ₆ gas cylinder 15, SF ₆ gas cylinder decompression valve 16 and gas supply valve 17, enter step S5;

Step S5: After judging and confirming that the vacuum valve 13 and the vacuum pump 12 are closed, open the SF ₆ gas cylinder 15, the SF ₆ gas cylinder decompression valve 16 and the air supply valve 17, and adjust the pressure value of the decompression valve 16 to the The pressure values of the SF ₆ gas 21 inside the SF ₆ circuit breaker are equal, and when the online purification device is filled with the same high-purity SF ₆ gas with the pressure value in the SF ₆ circuit breaker, close the SF ₆ gas cylinder 15, the SF ₆ gas Bottle decompression valve 16 and gas supply valve 17;

Step _S6 : open the air intake valve 9 and the air release valve 11 of the electric _SF6 circuit breaker and the frequency conversion circulation pump 1 in the online purification device;

Step S7: The SF ₆ gas 21 inside the SF ₆ circuit breaker in the electric SF ₆ circuit breaker enters the frequency conversion circulation pump 1 through the air release valve 11 and the exhaust pipe 19 through the circulation pump inlet valve 9, and the SF ₆ gas After being pressed out by the frequency conversion circulation pump 1, it enters the SF gas purification tower ₃ through the circulation pump outlet valve 2 and the air delivery pipe;

Step S8: the adsorbent contained in the SF ₆ gas purification tower 3, the adsorbent can absorb the moisture and harmful impurities entrained by the SF ₆ gas entering the SF ₆ gas purification tower 3, and purify the SF ₆ gas;

Step S9: the SF gas purified by the adsorbent in the step S8 enters the buffer tank ₄ , and the buffer tank ₄ reduces the fluctuation of the pressure value of the SF gas, and keeps the pressure value of the _SF gas in the online purification device stable ;

Step S10: The _SF6 gas in the buffer tank 4 enters the SF6 circuit breaker through the charging solenoid valve 5, the charging pipe deflation valve 7, the charging pipe 22, the charging connecting pipe 18 and the inlet valve ₉ of the _SF6 circuit breaker in sequence Inside, close the air intake valve 9 and air release valve 11 of the circuit breaker SF ₆ and the variable frequency circulation pump 1 in the online purification device to complete the purification cycle.

In this embodiment, the online purification device further includes a control module, one end of the control module is electrically connected to the pressure sensor 8 in the electric _SF6 circuit breaker, and the other end of the control module is connected to the The variable frequency circulating pump 1 and the charging solenoid valve 5 in the online purification device are used to control the output value of the variable frequency circulating pump and the opening degree of the charging solenoid valve _; the control module collects the _SF gas in the SF circuit breaker. Pressure value, when the pressure value of SF ₆ gas inside the SF ₆ circuit breaker is less than the set value, the control module controls the frequency conversion circulating pump to increase the output, and at the same time increases the opening degree of the inflatable solenoid valve; when the SF ₆ inside the circuit breaker When the pressure value of the SF ₆ gas is greater than the set value, the control module controls the frequency conversion circulation pump to reduce the output, and at the same time reduces the opening degree of the inflation solenoid valve.

In this embodiment, when the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker collected by the control module exceeds the set gas safety pressure value, the safety valve 6 is activated to release the pressure.

In the present embodiment, when the pressure value of the SF gas inside the SF circuit breaker collected by the control module is less than the set gas minimum pressure value, the SF gas cylinder ₁₅ , the pressure reducing valve ₁₆ and the gas _supplement are opened. Valve 17, sending the high-purity SF ₆ gas in the SF ₆ gas cylinder into the inside of the SF ₆ circuit breaker, when the pressure value of the SF ₆ gas inside the SF ₆ circuit breaker collected by the control module reaches the set gas When the minimum pressure value is reached, close the SF ₆ gas cylinder, pressure reducing valve and gas supply valve.

In this embodiment, preferably, during the _SF6 gas purification process of the online purification device, the _SF6 gas can be sampled to determine whether the _SF6 gas purification is qualified; when the _SF6 gas is purified to be qualified, the power _SF6 The air inlet valve and the air release valve of the circuit breaker close the variable frequency circulating pump, and at the same time open the air discharge valve of the inflatable pipe on the inflatable pipe to exhaust the gas in the pipeline and equipment in the online purification device.

The above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (9)

1. an electric power SF ₆isolating switch SF ₆gas in-line purification device, is characterized in that: comprise electric power SF ₆isolating switch and in-line purification device, described in-line purification device comprises a vacuum pump apparatus, a SF ₆gas cylinder, a frequency variable circulating pump, a SF ₆gas purification tower, a surge tank, gas-filled valve, inflation connecting leg and extraction pipe; Described vacuum pump apparatus comprises vacuum pump and coupled valve tube, in order to vacuumize process to described in-line purification device, one end that described valve tube is connected to described vacuum pump is provided with vacuum valve, and the other end of described valve tube is connected to described gas-filled valve; The entrance of described frequency variable circulating pump is connected with described extraction pipe, and one end that described extraction pipe is connected to described frequency variable circulating pump is provided with a pump inlet valve, and the other end of described extraction pipe is connected to described electric power SF ₆isolating switch; The outlet of described frequency variable circulating pump and described SF ₆the bottleneck of gas cylinder is all connected to described SF by induction pipe ₆one end of gas purification tower, described SF ₆the bottleneck of gas cylinder is connected to described SF ₆the induction pipe of gas purification tower is disposed with a SF ₆gas cylinder reducing valve and aeration valve, the outlet of described frequency variable circulating pump is connected to described SF ₆the induction pipe of gas purification tower is provided with an outlet valve of circulating pump; Described SF ₆the other end of gas purification tower is connected to the entrance of described surge tank by induction pipe, the outlet of described surge tank is connected with described gas-filled valve, one end that described gas-filled valve is connected to described surge tank is disposed with an inflation magnetic valve, a safety valve and a gas-filled valve purging valve, and the other end of described gas-filled valve is connected to described electric power SF through described inflation connecting leg ₆isolating switch.

2. an electric power SF ₆isolating switch SF ₆gas in-line purification device, is characterized in that: described electric power SF ₆isolating switch comprises SF ₆breaker body, SF ₆the SF of circuit breaker internal ₆gas, pressure transmitter, intake valve and purging valve; Described SF ₆one opening part of breaker body is provided with described intake valve, and described intake valve is connected with the inflation connecting leg of described in-line purification device, described SF ₆another opening part of breaker body is provided with described purging valve, and described purging valve is connected with the extraction pipe of described in-line purification device; Described pressure transmitter is arranged at SF ₆on isolating switch, in order to gather described SF ₆the SF of circuit breaker internal ₆the force value of gas.

3. an electric power SF ₆isolating switch SF ₆gas in-line purification device, is characterized in that: described SF ₆gas cylinder is built with high-purity SF ₆gas, in order to rinse pipeline in described in-line purification device and equipment makes to be full of high-purity SF in device ₆gas.

4. an electric power SF ₆isolating switch SF ₆gas in-line purification device, is characterized in that: described in-line purification device also comprises a control module, and one end of described control module is electrically connected at described electric power SF ₆pressure transmitter in isolating switch, the other end of described control module is connected to the frequency variable circulating pump in described in-line purification device and inflates magnetic valve, in order to control the open degree force value and described inflation magnetic valve of frequency variable circulating pump.

5. an electric power SF ₆isolating switch SF ₆gas in-line purification device, is characterized in that: described control module is PLC processor or micro processor.

6. an electric power SF as claimed in claim 1 ₆isolating switch SF ₆the using method of gas in-line purification device, is characterized in that comprising the following steps:

Step S1: open vacuum valve, inflation magnetic valve, pump inlet valve and outlet valve of circulating pump; Open vacuum pump to vacuumize the pipeline in described in-line purification device and equipment;

Step S2: after described in-line purification device has vacuumized, closes vacuum valve and vacuum pump;

Step S3: open SF ₆gas cylinder, SF ₆gas cylinder reducing valve and aeration valve, rinse the pipeline in described in-line purification device and equipment;

Step S4: judge whether be full of high-purity SF in described in-line purification device ₆gas, if the high-purity SF of underfilling in device ₆gas, then return step S3 and proceed flushing work, if be full of high-purity SF in device ₆gas, then close SF ₆gas cylinder, SF ₆gas cylinder reducing valve and aeration valve, enter step S5;

Step S5: judge and after confirming that described vacuum valve and vacuum pump are closed, open SF ₆gas cylinder, SF ₆gas cylinder reducing valve and aeration valve, and regulate described reducing valve force value and described SF ₆the SF of circuit breaker internal ₆the force value of gas is equal, when described in-line purification device is full of and SF ₆isolating switch internal pressure is worth identical high-purity SF ₆after gas, close SF ₆gas cylinder, SF ₆gas cylinder reducing valve and aeration valve;

Step S ₆: open described electric power SF ₆frequency variable circulating pump in the intake valve of isolating switch and purging valve and described in-line purification device;

Step S7: described electric power SF ₆sF in isolating switch ₆the SF of circuit breaker internal ₆gas enters in described frequency variable circulating pump by purging valve and extraction pipe through pump inlet valve, described SF ₆gas enters described SF through outlet valve of circulating pump and induction pipe after being extruded by described frequency variable circulating pump ₆in gas purification tower;

Step S8: described SF ₆the sorbent material of splendid attire in gas purification tower, described sorbent material is adsorbable enters described SF ₆sF in gas purification tower ₆the moisture of gas entrained with and detrimental impurity, purify described SF ₆gas;

Step S9: through the SF of sorbent material purification in described step S8 ₆gas enters in surge tank, and described surge tank reduces SF ₆the force value fluctuation of gas, keeps SF in described in-line purification device ₆the force value of gas is stablized;

Step S10: the SF in described surge tank ₆gas is successively through inflation magnetic valve, gas-filled valve purging valve, gas-filled valve, inflation connecting leg and SF ₆the intake valve of isolating switch enters SF ₆in isolating switch, close described circuit SF ₆frequency variable circulating pump in the intake valve of isolating switch and purging valve and described in-line purification device, completes decontamination cycle.

7. a kind of electric power SF according to claim 6 ₆isolating switch SF ₆the using method of gas in-line purification device, is characterized in that: described in-line purification device also comprises a control module, and one end of described control module is electrically connected at described electric power SF ₆pressure transmitter in isolating switch, the other end of described control module is connected to the frequency variable circulating pump in described in-line purification device and inflates magnetic valve, in order to control the open degree force value and described inflation magnetic valve of frequency variable circulating pump; Described control module gathers SF ₆the SF of circuit breaker internal ₆the force value of gas, works as SF ₆the SF of circuit breaker internal ₆when the force value of gas is less than set(ting)value, described control module controls frequency variable circulating pump increase and exerts oneself, and strengthens the open degree of inflation magnetic valve simultaneously; Work as SF ₆the SF of circuit breaker internal ₆when the force value of gas is greater than set(ting)value, described control module controls frequency variable circulating pump and reduces to exert oneself, and reduces the open degree of inflation magnetic valve simultaneously.

8. a kind of electric power SF according to claim 7 ₆isolating switch SF ₆the using method of gas in-line purification device, is characterized in that: when described control module gathers SF ₆the SF of circuit breaker internal ₆the force value of gas exceedes when arranging gas safety force value, starts safety valve action pressure release.

9. a kind of electric power SF according to claim 7 ₆isolating switch SF ₆the using method of gas in-line purification device, is characterized in that: when described control module gathers SF ₆the SF of circuit breaker internal ₆when the force value of gas is less than the gas minimum pressure values of setting, open described SF ₆gas cylinder, reducing valve and aeration valve, by described SF ₆high-purity SF in gas cylinder ₆gas sends into described SF ₆circuit breaker internal, when described control module gathers SF ₆the SF of circuit breaker internal ₆when the force value of gas reaches the gas minimum pressure values of setting, close described SF ₆gas cylinder, reducing valve and aeration valve.