CN109268678B - Inflatable recovery gas station of gas-insulated metal-enclosed switchgear and control method - Google Patents
Inflatable recovery gas station of gas-insulated metal-enclosed switchgear and control method Download PDFInfo
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- CN109268678B CN109268678B CN201811109040.4A CN201811109040A CN109268678B CN 109268678 B CN109268678 B CN 109268678B CN 201811109040 A CN201811109040 A CN 201811109040A CN 109268678 B CN109268678 B CN 109268678B
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- 238000011084 recovery Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims description 21
- 239000007788 liquid Substances 0.000 claims abstract description 197
- 230000007246 mechanism Effects 0.000 claims abstract description 75
- 238000004064 recycling Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 212
- 230000001105 regulatory effect Effects 0.000 claims description 126
- 239000002808 molecular sieve Substances 0.000 claims description 84
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 84
- 238000000746 purification Methods 0.000 claims description 48
- 238000007789 sealing Methods 0.000 claims description 19
- 239000006200 vaporizer Substances 0.000 claims description 19
- 238000005086 pumping Methods 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0335—Check-valves or non-return valves
Abstract
The automatic inflation gas recovery station of the gas-insulated metal-enclosed switchgear comprises a master station system and a plurality of groups of workstation systems, wherein the plurality of groups of workstation systems are connected with the master station system; the master station system comprises a liquid storage mechanism and a gaseous storage mechanism, and the liquid storage mechanism is connected with the gaseous storage mechanism; each group of workstation systems comprises a vacuumizing mechanism, a gas charging mechanism and a gas recycling mechanism, wherein a gas inlet of the gas charging mechanism is connected with a gas outlet of the gaseous storage mechanism; in conclusion, the invention has reasonable structural design and high working efficiency, reduces the labor intensity of workers and can lead the SF to 6 Charging SF into electrical equipment 6 Gas and can recover SF in gas insulated metal enclosed switchgear 6 The gas provides a guarantee for leakage detection of gas-insulated metal-enclosed switchgear production.
Description
Technical Field
The invention belongs to the technical field of automatic control of high-pressure gas closed switch equipment in electrical engineering, and particularly relates to an inflatable recovery gas station of gas-insulated metal closed switch equipment and a control method.
Background
With the development of the power grid, the voltage class of the power grid is higher and higher, the short-circuit capacity is larger and larger, and the insulation strength and the arc extinguishing energy of the power grid equipment are improvedThe force requirements are becoming higher and higher. For these requirements, sulfur hexafluoride (SF 6 ) The gas has the characteristic of strong electronegativity and excellent insulating property and arc extinguishing property, is widely applied to the field of high-voltage switches, is widely applied to equipment such as high-voltage and ultrahigh-voltage class circuit breakers, gas-insulated metal-enclosed switchgear (GIS) and the like, and gradually permeates into the field of medium-low voltage. Particularly, because the GIS respectively installs a breaker, a disconnecting switch, a bus, a grounding switch, a mutual inductor, an outlet sleeve or a cable terminal head and the like in respective sealing rooms to form an integral shell in a concentrated way, and SF6 gas is filled as an insulating medium, the GIS has the advantages of compact structure, small volume, light weight, no influence from atmospheric conditions, long maintenance interval, no electric shock accident, no electric noise interference and the like, and has become the first choice of the urban transformer substation.
The final procedure of the production of the gas-insulated metal-enclosed switchgear is the simulated leakage detection, wherein the simulated leakage detection is to use SF of 0.6MPa 6 The gas is filled into the gas-insulated metal-enclosed switchgear, the working condition of the gas-insulated metal-enclosed switchgear is simulated, the working condition of the gas-insulated metal-enclosed switchgear is observed, and whether the gas leaks or not is judged, so that whether the gas-insulated metal-enclosed switchgear meets the standards or not is judged, the gas-insulated metal-enclosed switchgear can be put into use, and after the simulated leak detection, if the gas-insulated metal-enclosed switchgear works well, SF in the gas-insulated metal-enclosed switchgear is processed 6 The gas is completely extracted, and 0.6MPa of nitrogen is filled into the gas-insulated metal-enclosed switchgear, so that the gas-insulated metal-enclosed switchgear can be popularized to the market for sale; however, the last process of the existing gas-insulated metal-enclosed switchgear production has no special system for providing gas source and recycling gas, and can only rely on frequent replacement of a gas cylinder or a gas tank for operation, thus having high labor intensity and low working efficiency.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an inflated recovery gas station of gas-insulated metal-enclosed switchgear and a control method thereof, wherein the inflated recovery gas station has high working efficiency and can perform inflated recovery operation on a plurality of gas-insulated metal-enclosed switchgear.
In order to solve the technical problems, the invention adopts the following technical scheme: the automatic inflation gas recovery station of the gas-insulated metal-enclosed switchgear comprises a master station system and a plurality of groups of workstation systems, wherein the plurality of groups of workstation systems are connected with the master station system; the master station system comprises a liquid storage mechanism and a gaseous storage mechanism, and the liquid storage mechanism is connected with the gaseous storage mechanism;
each group of workstation system comprises a vacuumizing mechanism, a gas charging mechanism and a gas recycling mechanism, wherein a gas inlet of the gas charging mechanism is connected with a gas outlet of the gaseous storage mechanism, and a gas outlet of the gas recycling mechanism is connected with a gas inlet of the liquid storage mechanism.
The liquid storage mechanism comprises a main liquid inlet pipe, a first liquid storage tank and a second liquid storage tank, wherein a liquid outlet of the main liquid inlet pipe is connected with the first liquid storage tank through the first liquid inlet pipe, a first electromagnetic valve and a first regulating valve are arranged on the first liquid inlet pipe, a liquid outlet of the main liquid inlet pipe is connected with the second liquid storage tank through the second liquid inlet pipe, a second electromagnetic valve and a second regulating valve are arranged on the second liquid inlet pipe, and an inlet of the main liquid inlet pipe is connected with outlets of the gas recovery mechanisms of all workstation systems;
the first refrigerating assembly comprises a first evaporator and two groups of first refrigerating machines, the two groups of first refrigerating machines are connected with the first evaporator, and a third electromagnetic valve is arranged on a connecting pipeline between the first refrigerating machines and the first evaporator;
the liquid storage mechanism further comprises a purification assembly, the purification assembly comprises a first purification pipeline, a second purification pipeline and a purification tank, a second refrigeration assembly is arranged on the purification tank, the second refrigeration assembly comprises a second evaporator and a second refrigerator, and a fourth electromagnetic valve is arranged on a connecting line of the second refrigerator and the second evaporator; the top of the purification tank is connected with a third purification pipeline, and a third regulating valve and a fifth electromagnetic valve are arranged on the third purification pipeline; an air inlet of the purifying tank is connected with an air outlet of a first purifying pipeline, and a fourth regulating valve, a first compressor, a first one-way valve and a fifth regulating valve are sequentially arranged on the first purifying pipeline along the air flow direction;
an air inlet of the first purifying pipeline is connected with the tops of the first liquid storage tank and the second liquid storage tank through fourth purifying pipelines respectively, and a sixth regulating valve and a sixth electromagnetic valve are arranged on each fourth purifying pipeline; the liquid outlet of the purification tank is connected with the liquid inlet of a second purification pipeline, the liquid outlet of the second purification pipeline is connected with the bottoms of the first liquid storage tank and the second liquid storage tank through a fifth purification pipeline respectively, a seventh regulating valve, a seventh electromagnetic valve, a liquid pump and a second one-way valve are sequentially arranged on the second purification pipeline along the liquid flowing direction, and an eighth regulating valve and an eighth electromagnetic valve are arranged on the fifth purification pipeline.
The gas storage mechanism comprises a main gas outlet pipe, a first gas storage tank and a second gas storage tank, a ninth regulating valve, a first molecular sieve, a second molecular sieve and a tenth regulating valve are sequentially arranged on the main gas outlet pipe along the gas flow direction, a gas inlet of the main gas outlet pipe is connected with the first gas storage tank through a first gas pipe, an eleventh regulating valve and a ninth electromagnetic valve are arranged on the first gas pipe, a gas inlet of the main gas outlet pipe is connected with the second gas storage tank through a second gas pipe, and a twelfth regulating valve and a tenth electromagnetic valve are arranged on the second gas pipe;
the first air storage tank is connected with the first liquid storage tank through a third air pipe, and a thirteenth regulating valve, an eleventh electromagnetic valve, a first vaporizer, a first pressure gauge and a fourteenth regulating valve are sequentially arranged on the third air pipe along the air flow direction; the second air storage tank is connected with the second liquid storage tank through a fourth air pipe, and a fifteenth regulating valve, a twelfth electromagnetic valve, a second vaporizer, a second pressure gauge and a sixteenth regulating valve are sequentially arranged on the fourth air pipe along the air flow direction;
the air outlet of the main air outlet pipe is connected with the air inlets of the air inflation mechanisms of all the workstation systems.
The gas recovery mechanism comprises a recovery pipeline, an inlet of the recovery pipeline is connected with a first self-sealing quick connector, an outlet of the recovery pipeline is connected with an inlet of a main liquid inlet pipe, a third pressure gauge, a thirteenth electromagnetic valve, a buffer tank, a third molecular sieve, a fourth molecular sieve, a second compressor, a cold heat exchanger and a fourteenth electromagnetic valve are sequentially arranged on the recovery pipeline along the gas flow direction, a pressurizing pipeline is connected on the recovery pipeline between the outlet and the inlet of the thirteenth electromagnetic valve, a fifteenth electromagnetic valve, a third compressor and a sixteenth electromagnetic valve are sequentially arranged on the pressurizing pipeline along the gas flow direction, and a refrigerating unit is arranged on the cold heat exchanger;
the gas charging mechanism comprises a charging pipeline, the gas inlet of the charging pipeline is connected with a second self-sealing quick connector, the gas inlet of the charging pipeline is connected with the gas outlet of the main gas outlet pipe, a seventeenth electromagnetic valve, an eighteenth electromagnetic valve and a fourth pressure gauge are sequentially arranged on the charging pipeline along the gas flow direction, a first vacuum tube is arranged on the charging pipeline between the outlet and the inlet of the eighteenth electromagnetic valve, and a nineteenth electromagnetic valve and a seventeenth regulating valve are arranged on the first vacuum tube;
the vacuum pumping mechanism comprises a main vacuum pumping pipe, an air inlet of the main vacuum pumping pipe is connected with a third self-sealing quick connector, an air outlet of the main vacuum pumping pipe is connected with a Roots pump and a vacuum pump, and an air outlet of the vacuum pump is connected with a gas recovery device through a branch vacuum pipeline; the main vacuumizing pipe is connected with the first vacuumizing pipe through a second vacuumizing pipe, a first valve is arranged on the second vacuumizing pipe, the main vacuumizing pipe is connected with the recovery pipeline through a third vacuumizing pipe, the joint of the third vacuumizing pipe and the recovery pipeline is located between the buffer tank and the third molecular sieve, and a second valve is arranged on the third vacuumizing pipe.
The control method of the automatic inflation recovery gas station of the gas-insulated metal-enclosed switchgear comprises four working modes:
the first working mode is to vacuumize the gas-insulated metal-enclosed switchgear:
connecting a main vacuumizing pipe with gas-insulated metal-enclosed switchgear through a third self-sealing quick connector, starting a Roots pump and a vacuum pump, vacuumizing the gas-insulated metal-enclosed switchgear through the main vacuumizing pipe under the combined action of the Roots pump and the vacuum pump, and collecting and storing the pumped gas in a gas recovery device;
the second working mode is SF 6 Gas is filled into the gas-insulated metal-enclosed switchgear:
the inflatable pipeline is connected with a gas-insulated metal-enclosed switchgear through a second self-sealing quick connector, and all valves are positionedIn a closed state, opening an eleventh regulating valve, a ninth electromagnetic valve, a ninth regulating valve, a tenth regulating valve, a seventeenth electromagnetic valve and an eighteenth electromagnetic valve, wherein the SF with the pressure of 0.6MPa in the first air storage tank 6 The gas enters a main gas outlet pipe through a first gas pipe, then enters an air charging pipeline after being filtered and dehumidified by a first molecular sieve and a second molecular sieve, and finally enters SF of 0.6MPa 6 The gas is filled into the gas-insulated metal-enclosed switchgear through the gas filling pipeline, and when the gas-insulated metal-enclosed switchgear is filled with SF of 0.6MPa 6 After the gas is discharged, closing an eleventh regulating valve, a ninth electromagnetic valve, a ninth regulating valve, a tenth regulating valve, a seventeenth electromagnetic valve and an eighteenth electromagnetic valve;
the third working mode is SF to be charged into the gas-insulated metal-enclosed switchgear 6 Gas recovery stores to first liquid storage pot:
connecting the recovery pipeline with gas-insulated metal-enclosed switchgear through a first self-sealing quick connector, wherein all valves are in a closed state, opening a thirteenth electromagnetic valve or opening all parts on a pressurizing pipeline, and SF in the gas-insulated metal-enclosed switchgear 6 The gas sequentially passes through a buffer tank, a third molecular sieve and a fourth molecular sieve, and SF is passed through the third molecular sieve and the fourth molecular sieve 6 The gas is dried and dehumidified, then enters a cold-heat exchanger under the driving of a second compressor, and the gaseous SF is carried out under the refrigeration of a refrigerating unit 6 SF converted into liquid state 6 Then SF in liquid state 6 Enters a first liquid storage tank through a main liquid inlet pipe for storage;
the fourth mode of operation is: and sequentially performing the first working mode, the second working mode and the third working mode according to the steps.
The working process for regenerating the first molecular sieve and the second molecular sieve comprises the following steps: opening a first valve, a seventeenth electromagnetic valve and a tenth regulating valve, starting a Roots pump and a vacuum pump, and exhausting air from the first molecular sieve and the second molecular sieve through a main vacuumizing pipe and an air inflation pipeline, so that the first molecular sieve and the second molecular sieve are regenerated;
the working process for regenerating the third molecular sieve and the fourth molecular sieve comprises the following steps: and opening a second valve, starting a Roots pump and a vacuum pump, and exhausting air from the third molecular sieve and the fourth molecular sieve through a main vacuumizing pipe and a recycling pipeline, so that the third molecular sieve and the fourth molecular sieve are regenerated.
In a third working mode, when the value of the third pressure gauge is larger than 0.09MPa, opening a thirteenth electromagnetic valve; and when the value of the third pressure gauge is smaller than 0.09MPa, opening a fifteenth electromagnetic valve, a third compressor and a sixteenth electromagnetic valve on the pressurizing pipeline, and closing the thirteenth electromagnetic valve.
In the third mode, the SF is in liquid form 6 Enters the first liquid storage tank through the main liquid inlet pipe for storage, and when the weight of the first liquid storage tank is more than 1.5t, the liquid SF stored in the first liquid storage tank is proved 6 The weight exceeds standard, at the moment, the first regulating valve and the first electromagnetic valve are closed, the second regulating valve and the second electromagnetic valve are opened, and the main liquid inlet pipe starts to convey the liquid SF to the second liquid storage tank 6 。
When the pressure in the first air storage tank is smaller than 0.6MPa, opening an eleventh electromagnetic valve, a thirteenth regulating valve and a fourteenth regulating valve, and obtaining the liquid SF in the first liquid storage tank 6 Enters a first vaporizer through a third air pipe, and then the liquid SF 6 Conversion to gaseous SF in a first vaporizer 6 Finally, the air enters the first air storage tank until the pressure in the first air storage tank is equal to 0.6Mpa, and the eleventh electromagnetic valve, the thirteenth regulating valve and the fourteenth regulating valve are closed again;
when the pressure in the second gas storage tank is smaller than 0.6MPa, opening a twelfth electromagnetic valve, a fifteenth regulating valve and a sixteenth regulating valve, and obtaining the liquid SF in the second liquid storage tank 6 Enters a second vaporizer through a fourth air pipe, and then the liquid SF 6 Conversion to gaseous SF in a second vaporizer 6 Finally, the air enters the second air storage tank until the pressure in the second air storage tank is equal to 0.6Mpa, and the twelfth electromagnetic valve, the fifteenth regulating valve and the sixteenth regulating valve are closed again.
When the pressure in the first liquid storage tank is more than 2MPa, the first liquid storage tank is proved to contain air and SF 6 A mixed gas of gases, which is opened with the first storageA sixth regulating valve and a sixth electromagnetic valve on a fourth purifying pipeline connected with the top of the liquid tank, and a fourth regulating valve, a fifth regulating valve, a third regulating valve, a fifth electromagnetic valve and a fourth electromagnetic valve are opened, the mixed gas in the first liquid storage tank enters the first purifying pipeline through the fourth purifying pipeline and then enters the purifying tank under the driving of the first compressor, and the gaseous SF in the mixed gas is refrigerated by the second refrigerating component 6 Conversion to liquid SF 6 The air in the mixed gas is discharged outwards through a third purifying pipeline;
then the seventh electromagnetic valve, the seventh regulating valve, the eighth regulating valve and the eighth electromagnetic valve are opened, and the liquid SF in the tank is purified under the action of the liquid pump 6 And sequentially passing through the second purifying pipeline and the fifth purifying pipeline, then entering the first liquid storage tank, and closing all valves until the pressure in the first liquid storage tank is less than or equal to 2 MPa.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) The invention connects a plurality of groups of workstation systems through a master station system, and the master station system is provided with SF providing 6 Air source function and SF recovery 6 The air source, each work station system comprises three mechanisms, namely a vacuumizing mechanism, an air charging mechanism and an air recycling mechanism, each group of mechanisms can be independently connected with a group of gas-insulated metal-enclosed switchgear, so that the vacuumizing mechanism, the air charging mechanism and the air recycling mechanism can be performed simultaneously, and the work efficiency is high;
(2) The first molecular sieve, the second molecular sieve, the third molecular sieve and the fourth molecular sieve are required to be in a dry state, so that the first molecular sieve, the second molecular sieve, the third molecular sieve and the fourth molecular sieve are required to be subjected to dehumidifying regeneration at regular intervals; when the third molecular sieve and the fourth molecular sieve need to be regenerated, a second valve is opened, a Roots pump and a vacuum pump are started, and the third molecular sieve and the fourth molecular sieve are pumped through a main pumping pipe and a recovery pipeline, so that the third molecular sieve and the fourth molecular sieve are regenerated;
(3) Due to the requirement of filling SF into the gas-insulated metal-enclosed switchgear 6 When the pressure of the gas is 0.6MPa and the pressure in the first gas storage tank or the second gas storage tank is less than 0.6MPa, the gas in the first gas storage tank or the second gas storage tank is proved to be insufficient, and the gas SF needs to be supplemented 6 The invention utilizes the vaporizer to store the liquid SF in the first liquid storage tank or the second liquid storage tank 6 Conversion to gaseous SF 6 Then gaseous SF is carried out 6 Filling the first air storage tank or the second air storage tank;
(4) In a third working mode, when the value of the third pressure gauge is larger than 0.09MPa, the thirteenth electromagnetic valve is opened, when the value of the third pressure gauge is smaller than 0.09MPa, the fifteenth electromagnetic valve, the third compressor and the sixteenth electromagnetic valve on the pressurizing pipeline are opened, the thirteenth electromagnetic valve is closed, and the buffer tank is used for slowing down the entering SF 6 Impact of gas on the third molecular sieve;
(5) The liquid storage mechanism has an automatic purification function, and when the pressure in the first liquid storage tank is higher than 2MPa, the first liquid storage tank is proved to contain air and SF 6 The mixed gas of the gas is opened at the moment, a sixth regulating valve and a sixth electromagnetic valve on a fourth purifying pipeline connected with the top of the first liquid storage tank are opened, and the fourth regulating valve, the fifth regulating valve, the third regulating valve, the fifth electromagnetic valve and the fourth electromagnetic valve are opened, the mixed gas in the first liquid storage tank enters the first purifying pipeline through the fourth purifying pipeline and then enters the purifying tank under the driving of a first compressor, and the gaseous SF in the mixed gas is cooled by a second refrigerating component 6 Conversion to liquid SF 6 The air in the mixed gas is discharged outwards through a third purifying pipeline; then the seventh electromagnetic valve, the seventh regulating valve, the eighth regulating valve and the eighth electromagnetic valve are opened, and the liquid SF in the tank is purified under the action of the liquid pump 6 Sequentially passing through a second purifying pipeline and a fifth purifying pipelineAnd then the liquid enters the first liquid storage tank until the pressure in the first liquid storage tank is less than or equal to 2MPa, and all valves are closed.
In conclusion, the invention has reasonable structural design and high working efficiency, reduces the labor intensity of workers, and can charge SF into the gas-insulated metal-enclosed switchgear 6 Gas and can recover SF in gas insulated metal enclosed switchgear 6 The gas provides a guarantee for leakage detection of gas-insulated metal-enclosed switchgear production.
Drawings
FIG. 1 is a schematic diagram of the primary station system of the present invention;
fig. 2 is a schematic diagram of the workstation system of the present invention.
Detailed Description
As shown in fig. 1 and 2, the automatic inflation recovery gas station of the gas-insulated metal-enclosed switchgear comprises a main station system and a plurality of groups of workstation systems, wherein the plurality of groups of workstation systems are connected with the main station system; the master station system comprises a liquid storage mechanism and a gaseous storage mechanism, and the liquid storage mechanism is connected with the gaseous storage mechanism;
each group of workstation system comprises a vacuumizing mechanism, a gas charging mechanism and a gas recycling mechanism, wherein a gas inlet of the gas charging mechanism is connected with a gas outlet of the gaseous storage mechanism, and a gas outlet of the gas recycling mechanism is connected with a gas inlet of the liquid storage mechanism.
The liquid storage mechanism comprises a main liquid inlet pipe 1, a first liquid storage tank 2 and a second liquid storage tank 3, wherein a liquid outlet of the main liquid inlet pipe 1 is connected with the first liquid storage tank 2 through a first liquid inlet pipe 4, a first electromagnetic valve V1 and a first regulating valve C1 are arranged on the first liquid inlet pipe 4, a liquid outlet of the main liquid inlet pipe 1 is connected with the second liquid storage tank 2 through a second liquid inlet pipe 5, a second electromagnetic valve V2 and a second regulating valve C2 are arranged on the second liquid inlet pipe 5, and an inlet of the main liquid inlet pipe 1 is connected with outlets of gas recovery mechanisms of all workstation systems.
The first liquid storage tank 2 and the second liquid storage tank 3 are respectively provided with a first refrigeration component, each first refrigeration component comprises a first evaporator 6 and two groups of first refrigerators 7, each two groups of first refrigerators 7 are connected with the first evaporator 6, and a third electromagnetic valve V3 is arranged on a connecting line of each first refrigerator 7 and each first evaporator 6.
The liquid storage mechanism further comprises a purification assembly, the purification assembly comprises a first purification pipeline 8, a second purification pipeline 9 and a purification tank 10, a second refrigeration assembly is arranged on the purification tank 10, the second refrigeration assembly comprises a second evaporator 11 and a second refrigerator 12, and a fourth electromagnetic valve V4 is arranged on a connecting line of the second refrigerator 12 and the second evaporator 11; the top of the purification tank 10 is connected with a third purification pipeline 13, and a third regulating valve C3 and a fifth electromagnetic valve V5 are arranged on the third purification pipeline 13; the air inlet of the purifying tank 10 is connected with the air outlet of the first purifying pipeline 8, and the first purifying pipeline 8 is sequentially provided with a fourth regulating valve C4, a first compressor 14, a first one-way valve 18 and a fifth regulating valve C5 along the air flow direction;
the air inlet of the first purifying pipeline 8 is connected with the tops of the first liquid storage tank 2 and the second liquid storage tank 3 through fourth purifying pipelines 15 respectively, and a sixth regulating valve C6 and a sixth electromagnetic valve V6 are arranged on each fourth purifying pipeline 15; the liquid outlet of the purification tank 10 is connected with the liquid inlet of a second purification pipeline 9, the liquid outlet of the second purification pipeline 9 is respectively connected with the bottoms of the first liquid storage tank 2 and the second liquid storage tank 3 through a fifth purification pipeline 16, a seventh regulating valve C7, a seventh electromagnetic valve V7, a liquid pump 17 and a second one-way valve 19 are sequentially arranged on the second purification pipeline 9 along the liquid flow direction, and an eighth regulating valve C8 and an eighth electromagnetic valve V8 are arranged on each fifth purification pipeline 16.
The gas storage mechanism comprises a main gas outlet pipe 20, a first gas storage tank 21 and a second gas storage tank 22, a ninth regulating valve C9, a first molecular sieve 23, a second molecular sieve 24 and a tenth regulating valve C10 are sequentially arranged on the main gas outlet pipe 20 along the gas flow direction, a gas inlet of the main gas outlet pipe 20 is connected with the first gas storage tank 21 through a first gas pipe 25, an eleventh regulating valve C11 and a ninth electromagnetic valve V9 are arranged on the first gas pipe 25, a gas inlet of the main gas outlet pipe 20 is connected with the second gas storage tank 22 through a second gas pipe 26, and a twelfth regulating valve C12 and a tenth electromagnetic valve V10 are arranged on the second gas pipe 26;
the first air storage tank 21 is connected with the first liquid storage tank 2 through a third air pipe 27, and a thirteenth regulating valve C13, an eleventh electromagnetic valve V11, a first vaporizer 28, a first pressure gauge P1 and a fourteenth regulating valve C14 are sequentially arranged on the third air pipe 27 along the air flow direction; the second air storage tank 22 is connected with the second liquid storage tank 3 through a fourth air pipe 29, and a fifteenth regulating valve C15, a twelfth electromagnetic valve V12, a second vaporizer 30, a second pressure gauge P2 and a sixteenth regulating valve C16 are sequentially arranged on the fourth air pipe 29 along the air flow direction;
the air outlet of the main air outlet pipe 20 is connected with the air inlets of the air charging mechanisms of all the workstation systems.
The gas recovery mechanism comprises a recovery pipeline 31, wherein the inlet of the recovery pipeline 31 is connected with a first self-sealing quick connector 32, the outlet of the recovery pipeline 31 is connected with the inlet of the main liquid inlet pipe 1, a third pressure gauge P3, a thirteenth electromagnetic valve V13, a buffer tank 33, a third molecular sieve 34, a fourth molecular sieve 35, a second compressor 36, a cold-heat exchanger 37 and a fourteenth electromagnetic valve V14 are sequentially arranged on the recovery pipeline 31 along the gas flow direction, a pressurizing pipeline 38 is connected on the recovery pipeline 31 between the outlet and the inlet of the thirteenth electromagnetic valve V13, a fifteenth electromagnetic valve V15, a third compressor 39 and a sixteenth electromagnetic valve V16 are sequentially arranged on the pressurizing pipeline 38 along the gas flow direction, and a refrigerating unit 40 is arranged on the cold-heat exchanger 37;
the gas charging mechanism comprises a charging pipeline 41, a gas inlet of the charging pipeline 41 is connected with a second self-sealing quick connector 42, a gas inlet of the charging pipeline 41 is connected with a gas outlet of the main gas outlet pipe 20, a seventeenth electromagnetic valve V17, an eighteenth electromagnetic valve V18 and a fourth pressure gauge P4 are sequentially arranged on the charging pipeline 41 along the gas flow direction, a first vacuum tube 43 is arranged on the charging pipeline 41 between the outlet and the inlet of the eighteenth electromagnetic valve V18, and a nineteenth electromagnetic valve V19 and a seventeenth regulating valve C17 are arranged on the first vacuum tube 43;
the vacuumizing mechanism comprises a main vacuumizing tube 44, a third self-sealing quick connector 45 is connected to an air inlet of the main vacuumizing tube 44, a Roots pump 46 and a vacuum pump 47 are connected to an air outlet of the main vacuumizing tube 44, and an air outlet of the vacuum pump 47 is connected to an air recovery device 49 through a branch vacuum pipeline 48; the main vacuum pipe 44 is connected with the first vacuum pipe 43 through the second vacuum pipe 50, the first valve D1 is arranged on the second vacuum pipe 50, the main vacuum pipe 44 is connected with the recovery pipeline 31 through the third vacuum pipe 51, the connection part of the third vacuum pipe 51 and the recovery pipeline 31 is positioned between the buffer tank 33 and the third molecular sieve 34, and the second valve D2 is arranged on the third vacuum pipe 51.
The control method of the automatic inflation recovery gas station of the gas-insulated metal-enclosed switchgear comprises four working modes:
the first working mode is to vacuumize the gas-insulated metal-enclosed switchgear:
connecting the main vacuumizing tube 44 with the gas-insulated metal-enclosed switchgear through a third self-sealing quick connector 45, starting the Roots pump 46 and the vacuum pump 47, vacuumizing the gas-insulated metal-enclosed switchgear through the main vacuumizing tube 44 under the combined action of the Roots pump 46 and the vacuum pump 47, and collecting and storing the extracted gas in a gas recovery device 49;
the second working mode is SF 6 Gas is filled into the gas-insulated metal-enclosed switchgear:
the air charging pipeline 41 is connected with a gas-insulated metal-enclosed switchgear through a second self-sealing quick connector 42, all valves are in a closed state, an eleventh regulating valve C11, a ninth electromagnetic valve V9, a ninth regulating valve C9, a tenth regulating valve C10, a seventeenth electromagnetic valve V17 and an eighteenth electromagnetic valve V18 are opened, and SF with the pressure of 0.6MPa in the first air storage tank 21 is obtained 6 The gas enters the main gas outlet pipe 20 through the first gas pipe 25, then enters the gas charging pipeline 41 after being filtered and dehumidified by the first molecular sieve 23 and the second molecular sieve 24, and finally enters the SF of 0.6MPa 6 Gas is filled into the gas-insulated metal-enclosed switchgear through the gas filling pipe 41, and when the gas-insulated metal-enclosed switchgear is filled with SF of 0.6MPa 6 After the gas is discharged, the eleventh regulating valve C11, the ninth electromagnetic valve V9, the ninth regulating valve C9, the tenth regulating valve C10, the seventeenth electromagnetic valve V17 and the eighteenth electromagnetic valve V18 are closed;
the third working mode is SF to be charged into the gas-insulated metal-enclosed switchgear 6 Gas recovery and storage to the first liquid storage tank 2:
the recovery pipeline 31 is connected with the gas-insulated metal-enclosed switchgear through the first self-sealing quick connector 32, allThe valve being closed, opening the thirteenth solenoid valve V13 or opening all parts of the booster duct 38, SF in a gas insulated metal-enclosed switchgear 6 The gas sequentially passes through a buffer tank 33, a third molecular sieve 34 and a fourth molecular sieve 35, and the third molecular sieve 34 and the fourth molecular sieve 35 pass through SF 6 The gas is dried and dehumidified, and then enters a cold-heat exchanger 37 under the drive of a second compressor 36, and the gaseous SF is cooled by a refrigerating unit 40 6 SF converted into liquid state 6 Then SF in liquid state 6 Enters the first liquid storage tank 2 through the main liquid inlet pipe 1 for storage.
The fourth mode of operation is: and sequentially performing the first working mode, the second working mode and the third working mode according to the steps.
The first molecular sieve 23 and the second molecular sieve 24 are regenerated by the following working processes: opening a first valve D1, a seventeenth electromagnetic valve V17 and a tenth regulating valve C10, starting a Roots pump 46 and a vacuum pump 47, and pumping air from the first molecular sieve 23 and the second molecular sieve 24 through a main vacuum pumping pipe 44 and an air charging pipeline 41 so as to dry-regenerate the first molecular sieve 23 and the second molecular sieve 24;
the process of regenerating the third molecular sieve 34 and the fourth molecular sieve 35 is as follows: the second valve D2 is opened, the roots pump 46 and the vacuum pump 47 are started, and the third molecular sieve 34 and the fourth molecular sieve 35 are pumped through the main pumping pipe 44 and the recovery pipe 31, so that the third molecular sieve 34 and the fourth molecular sieve 35 are subjected to regeneration treatment.
In the third operation mode, the thirteenth electromagnetic valve V13 is opened when the value of the third pressure gauge P3 is greater than 0.09MPa, the fifteenth electromagnetic valve V15, the third compressor 39 and the sixteenth electromagnetic valve V16 on the pressurizing pipe 38 are opened when the value of the third pressure gauge P3 is less than 0.09MPa, and the thirteenth electromagnetic valve V13 is closed.
In the third mode, the SF is in liquid form 6 Enters the first liquid storage tank 2 through the main liquid inlet pipe 1, and when the weight of the first liquid storage tank 2 is more than 1.5t, the liquid SF stored in the first liquid storage tank 2 is proved 6 The weight exceeds the standard, at this time, the first regulating valve C1 and the first electromagnetic valve V1 are closed, and the first electromagnetic valve is openedTwo regulating valves C2 and a second electromagnetic valve V2, and the main liquid inlet pipe 1 starts to convey liquid SF to the second liquid storage tank 3 6 。
When the pressure in the first air tank 21 is less than 0.6MPa, the eleventh electromagnetic valve V11, the thirteenth regulating valve C13 and the fourteenth regulating valve C14 are opened, and the liquid SF in the first liquid storage tank 2 is stored 6 Enters a first vaporizer 28 through a third air pipe 27, and then the liquid SF 6 Is converted into gaseous SF in a first vaporizer 28 6 Finally, the air enters the first air storage tank 21 until the pressure in the first air storage tank 21 is equal to 0.6Mpa, and the eleventh electromagnetic valve V11, the thirteenth regulating valve C13 and the fourteenth regulating valve C14 are closed again;
when the pressure in the second air storage tank 22 is less than 0.6MPa, the twelfth electromagnetic valve V12, the fifteenth regulating valve C15 and the sixteenth regulating valve C16 are opened, and the liquid SF in the second liquid storage tank 3 is stored 6 Through a fourth air pipe 29 into a second vaporizer 30, and then into a liquid SF 6 Is converted into gaseous SF in a second vaporizer 30 6 Finally, the air enters the second air storage tank 22 until the pressure in the second air storage tank 22 is equal to 0.6Mpa, and the twelfth electromagnetic valve V12, the fifteenth regulating valve C15 and the sixteenth regulating valve C16 are closed again.
When the pressure in the first liquid storage tank 2 is more than 2MPa, the first liquid storage tank 2 is proved to contain air and SF 6 The mixed gas of the gases is opened, a sixth regulating valve C6 and a sixth electromagnetic valve V6 on a fourth purifying pipeline 15 connected with the top of the first liquid storage tank 2 are opened, a fourth regulating valve C4, a fifth regulating valve C5, a third regulating valve C3, a fifth electromagnetic valve V5 and a fourth electromagnetic valve V4 are opened, the mixed gas in the first liquid storage tank 2 enters the first purifying pipeline 8 through the fourth purifying pipeline 15 and then enters the purifying tank 10 under the driving of a first compressor 14, and the gaseous SF in the mixed gas is cooled by a second refrigerating component 6 Conversion to liquid SF 6 The air in the mixed gas is discharged outwards through a third purifying pipeline 13;
then the seventh electromagnetic valve V7, the seventh regulating valve C7, the eighth regulating valve C8 and the eighth electromagnetic valve V8 are opened, and the liquid SF in the tank 10 is purified under the action of the liquid pump 17 6 Sequentially passes through the second purifying pipeline 9 and the fifth purifying pipeline16 and then enters the first liquid storage tank 2 until the pressure in the first liquid storage tank 2 is less than or equal to 2MPa, and closing all the valves.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (9)
1. Automatic inflation recycling gas station of gas-insulated metal-enclosed switchgear, its characterized in that: the system comprises a master station system and a plurality of groups of workstation systems, wherein the plurality of groups of workstation systems are connected with the master station system; the master station system comprises a liquid storage mechanism and a gaseous storage mechanism, and the liquid storage mechanism is connected with the gaseous storage mechanism;
each group of workstation systems comprises a vacuumizing mechanism, a gas charging mechanism and a gas recycling mechanism, wherein a gas inlet of the gas charging mechanism is connected with a gas outlet of the gaseous storage mechanism, and a gas outlet of the gas recycling mechanism is connected with a gas inlet of the liquid storage mechanism;
the liquid storage mechanism comprises a main liquid inlet pipe, a first liquid storage tank and a second liquid storage tank, wherein a liquid outlet of the main liquid inlet pipe is connected with the first liquid storage tank through the first liquid inlet pipe, a first electromagnetic valve and a first regulating valve are arranged on the first liquid inlet pipe, a liquid outlet of the main liquid inlet pipe is connected with the second liquid storage tank through the second liquid inlet pipe, a second electromagnetic valve and a second regulating valve are arranged on the second liquid inlet pipe, and an inlet of the main liquid inlet pipe is connected with outlets of the gas recovery mechanisms of all workstation systems;
the first refrigerating assembly comprises a first evaporator and two groups of first refrigerating machines, the two groups of first refrigerating machines are connected with the first evaporator, and a third electromagnetic valve is arranged on a connecting pipeline between the first refrigerating machines and the first evaporator;
the liquid storage mechanism further comprises a purification assembly, the purification assembly comprises a first purification pipeline, a second purification pipeline and a purification tank, a second refrigeration assembly is arranged on the purification tank, the second refrigeration assembly comprises a second evaporator and a second refrigerator, and a fourth electromagnetic valve is arranged on a connecting line of the second refrigerator and the second evaporator; the top of the purification tank is connected with a third purification pipeline, and a third regulating valve and a fifth electromagnetic valve are arranged on the third purification pipeline; an air inlet of the purifying tank is connected with an air outlet of a first purifying pipeline, and a fourth regulating valve, a first compressor, a first one-way valve and a fifth regulating valve are sequentially arranged on the first purifying pipeline along the air flow direction;
an air inlet of the first purifying pipeline is connected with the tops of the first liquid storage tank and the second liquid storage tank through fourth purifying pipelines respectively, and a sixth regulating valve and a sixth electromagnetic valve are arranged on each fourth purifying pipeline; the liquid outlet of the purification tank is connected with the liquid inlet of a second purification pipeline, the liquid outlet of the second purification pipeline is connected with the bottoms of the first liquid storage tank and the second liquid storage tank through a fifth purification pipeline respectively, a seventh regulating valve, a seventh electromagnetic valve, a liquid pump and a second one-way valve are sequentially arranged on the second purification pipeline along the liquid flowing direction, and an eighth regulating valve and an eighth electromagnetic valve are arranged on the fifth purification pipeline.
2. The automatic charge recovery gas station for a gas insulated metal-enclosed switchgear of claim 1, wherein: the gas storage mechanism comprises a main gas outlet pipe, a first gas storage tank and a second gas storage tank, a ninth regulating valve, a first molecular sieve, a second molecular sieve and a tenth regulating valve are sequentially arranged on the main gas outlet pipe along the gas flow direction, a gas inlet of the main gas outlet pipe is connected with the first gas storage tank through a first gas pipe, an eleventh regulating valve and a ninth electromagnetic valve are arranged on the first gas pipe, a gas inlet of the main gas outlet pipe is connected with the second gas storage tank through a second gas pipe, and a twelfth regulating valve and a tenth electromagnetic valve are arranged on the second gas pipe;
the first air storage tank is connected with the first liquid storage tank through a third air pipe, and a thirteenth regulating valve, an eleventh electromagnetic valve, a first vaporizer, a first pressure gauge and a fourteenth regulating valve are sequentially arranged on the third air pipe along the air flow direction; the second air storage tank is connected with the second liquid storage tank through a fourth air pipe, and a fifteenth regulating valve, a twelfth electromagnetic valve, a second vaporizer, a second pressure gauge and a sixteenth regulating valve are sequentially arranged on the fourth air pipe along the air flow direction;
the air outlet of the main air outlet pipe is connected with the air inlets of the air inflation mechanisms of all the workstation systems.
3. The automatic charge recovery gas station for a gas insulated metal-enclosed switchgear of claim 2, wherein: the gas recovery mechanism comprises a recovery pipeline, an inlet of the recovery pipeline is connected with a first self-sealing quick connector, an outlet of the recovery pipeline is connected with an inlet of a main liquid inlet pipe, a third pressure gauge, a thirteenth electromagnetic valve, a buffer tank, a third molecular sieve, a fourth molecular sieve, a second compressor, a cold heat exchanger and a fourteenth electromagnetic valve are sequentially arranged on the recovery pipeline along the gas flow direction, a pressurizing pipeline is connected on the recovery pipeline between the outlet and the inlet of the thirteenth electromagnetic valve, a fifteenth electromagnetic valve, a third compressor and a sixteenth electromagnetic valve are sequentially arranged on the pressurizing pipeline along the gas flow direction, and a refrigerating unit is arranged on the cold heat exchanger;
the gas charging mechanism comprises a charging pipeline, the gas inlet of the charging pipeline is connected with a second self-sealing quick connector, the gas inlet of the charging pipeline is connected with the gas outlet of the main gas outlet pipe, a seventeenth electromagnetic valve, an eighteenth electromagnetic valve and a fourth pressure gauge are sequentially arranged on the charging pipeline along the gas flow direction, a first vacuum tube is arranged on the charging pipeline between the outlet and the inlet of the eighteenth electromagnetic valve, and a nineteenth electromagnetic valve and a seventeenth regulating valve are arranged on the first vacuum tube;
the vacuum pumping mechanism comprises a main vacuum pumping pipe, an air inlet of the main vacuum pumping pipe is connected with a third self-sealing quick connector, an air outlet of the main vacuum pumping pipe is connected with a Roots pump and a vacuum pump, and an air outlet of the vacuum pump is connected with a gas recovery device through a branch vacuum pipeline; the main vacuumizing pipe is connected with the first vacuumizing pipe through a second vacuumizing pipe, a first valve is arranged on the second vacuumizing pipe, the main vacuumizing pipe is connected with the recovery pipeline through a third vacuumizing pipe, the joint of the third vacuumizing pipe and the recovery pipeline is located between the buffer tank and the third molecular sieve, and a second valve is arranged on the third vacuumizing pipe.
4. A method of controlling an automatic charge recovery gas station for a gas insulated metal-enclosed switchgear as claimed in claim 3, wherein:
the control method has four working modes:
the first working mode is to vacuumize the gas-insulated metal-enclosed switchgear:
connecting a main vacuumizing pipe with gas-insulated metal-enclosed switchgear through a third self-sealing quick connector, starting a Roots pump and a vacuum pump, vacuumizing the gas-insulated metal-enclosed switchgear through the main vacuumizing pipe under the combined action of the Roots pump and the vacuum pump, and collecting and storing the pumped gas in a gas recovery device;
the second working mode is SF 6 Gas is filled into the gas-insulated metal-enclosed switchgear:
the inflatable pipeline is connected with a gas-insulated metal-enclosed switchgear through a second self-sealing quick connector, all valves are in a closed state, an eleventh regulating valve, a ninth electromagnetic valve, a ninth regulating valve, a tenth regulating valve, a seventeenth electromagnetic valve and an eighteenth electromagnetic valve are opened, and SF with the pressure in a first gas storage tank of 0.6MPa is obtained 6 The gas enters a main gas outlet pipe through a first gas pipe, then enters an air charging pipeline after being filtered and dehumidified by a first molecular sieve and a second molecular sieve, and finally enters SF of 0.6MPa 6 The gas is filled into the gas-insulated metal-enclosed switchgear through the gas filling pipeline, and when the gas-insulated metal-enclosed switchgear is filled with SF of 0.6MPa 6 After the gas is discharged, closing an eleventh regulating valve, a ninth electromagnetic valve, a ninth regulating valve, a tenth regulating valve, a seventeenth electromagnetic valve and an eighteenth electromagnetic valve;
the third working mode is SF to be charged into the gas-insulated metal-enclosed switchgear 6 Gas recovery stores to first liquid storage pot:
connecting the recovery pipeline with gas-insulated metal-enclosed switchgear through a first self-sealing quick connector, wherein all valves are in a closed state, opening a thirteenth electromagnetic valve or opening all parts on a pressurizing pipeline, and SF in the gas-insulated metal-enclosed switchgear 6 The gas sequentially passes through a buffer tank, a third molecular sieve and a fourth molecular sieve, and SF is passed through the third molecular sieve and the fourth molecular sieve 6 The gas is subjected to moisture, decomposition product purification and dust filtration, and then enters a cold-heat exchanger under the drive of a second compressor, and the gaseous SF is produced under the refrigeration of a refrigeration unit 6 SF converted into liquid state 6 Then SF in liquid state 6 Enters a first liquid storage tank through a main liquid inlet pipe for storage;
the fourth mode of operation is: and sequentially performing the first working mode, the second working mode and the third working mode according to the steps.
5. The control method of the automatic charging recovery gas station of the gas insulated metal-enclosed switchgear according to claim 4, wherein: the working process for dehumidifying the first molecular sieve and the second molecular sieve comprises the following steps: opening a first valve, a seventeenth electromagnetic valve and a tenth regulating valve, starting a Roots pump and a vacuum pump, and exhausting air from the first molecular sieve and the second molecular sieve through a main vacuumizing pipe and an air inflation pipeline, so that the first molecular sieve and the second molecular sieve are regenerated;
the working process for regenerating the third molecular sieve and the fourth molecular sieve comprises the following steps: and opening a second valve, starting a Roots pump and a vacuum pump, and exhausting air from the third molecular sieve and the fourth molecular sieve through a main vacuumizing pipe and a recycling pipeline, so that the third molecular sieve and the fourth molecular sieve are regenerated.
6. The control method of the automatic charging recovery gas station of the gas insulated metal-enclosed switchgear according to claim 4, wherein: in a third working mode, when the value of the third pressure gauge is larger than 0.09MPa, the thirteenth electromagnetic valve is opened, and when the value of the third pressure gauge is smaller than 0.09MPa, the fifteenth electromagnetic valve, the third compressor and the sixteenth electromagnetic valve on the pressurizing pipeline are opened, and the thirteenth electromagnetic valve is closed.
7. The control method of the automatic charging recovery gas station of the gas insulated metal-enclosed switchgear according to claim 4, wherein: in the third mode, the SF is in liquid form 6 Enter the first storage through the main liquid inlet pipeThe liquid SF stored in the first liquid storage tank is proved when the weight of the first liquid storage tank is larger than 1.5t 6 The weight exceeds standard, at the moment, the first regulating valve and the first electromagnetic valve are closed, the second regulating valve and the second electromagnetic valve are opened, and the main liquid inlet pipe starts to convey the liquid SF to the second liquid storage tank 6 。
8. The control method of the automatic charging recovery gas station of the gas insulated metal-enclosed switchgear according to claim 4, wherein: when the pressure in the first air storage tank is smaller than 0.6MPa, opening an eleventh electromagnetic valve, a thirteenth regulating valve and a fourteenth regulating valve, and obtaining the liquid SF in the first liquid storage tank 6 Enters a first vaporizer through a third air pipe, and then the liquid SF 6 Conversion to gaseous SF in a first vaporizer 6 Finally, the air enters the first air storage tank until the pressure in the first air storage tank is equal to 0.6Mpa, and the eleventh electromagnetic valve, the thirteenth regulating valve and the fourteenth regulating valve are closed again;
when the pressure in the second gas storage tank is smaller than 0.6MPa, opening a twelfth electromagnetic valve, a fifteenth regulating valve and a sixteenth regulating valve, and obtaining the liquid SF in the second liquid storage tank 6 Enters a second vaporizer through a fourth air pipe, and then the liquid SF 6 Conversion to gaseous SF in a second vaporizer 6 Finally, the air enters the second air storage tank until the pressure in the second air storage tank is equal to 0.6Mpa, and the twelfth electromagnetic valve, the fifteenth regulating valve and the sixteenth regulating valve are closed again.
9. The control method of the automatic charging recovery gas station of the gas insulated metal-enclosed switchgear according to claim 4, wherein: when the pressure in the first liquid storage tank is more than 2MPa, the first liquid storage tank is proved to contain air and SF 6 The mixed gas of the gases is opened at the moment, a sixth regulating valve and a sixth electromagnetic valve on a fourth purifying pipeline connected with the top of the first liquid storage tank are opened, and the fourth regulating valve, the fifth regulating valve, the third regulating valve, the fifth electromagnetic valve and the fourth electromagnetic valve are opened, the mixed gas in the first liquid storage tank enters the first purifying pipeline through the fourth purifying pipeline and then flows into the first purifying pipelineThe gas SF in the mixed gas enters a purification tank under the driving of a compressor and is refrigerated by a second refrigeration component 6 Conversion to liquid SF 6 The air in the mixed gas is discharged outwards through a third purifying pipeline;
then the seventh electromagnetic valve, the seventh regulating valve, the eighth regulating valve and the eighth electromagnetic valve are opened, and the liquid SF in the tank is purified under the action of the liquid pump 6 And sequentially passing through the second purifying pipeline and the fifth purifying pipeline, then entering the first liquid storage tank, and closing all valves until the pressure in the first liquid storage tank is less than or equal to 2 MPa.
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| CN113878128B (en) * | 2021-10-13 | 2023-04-07 | 南京铖联激光科技有限公司 | 3D printing tail gas recycling system and method |
| CN113915519B (en) * | 2021-10-19 | 2022-12-09 | 国网安徽省电力有限公司电力科学研究院 | Zero-emission anti-deformation ring main unit insulation gas recovery device and method |
| CN114857492B (en) * | 2022-04-19 | 2023-10-31 | 安徽新力电业科技咨询有限责任公司 | Sectional type supercharged and continuously stored SF 6 Gas on-site recovery device |
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