CN217482510U - SF (sulfur hexafluoride) 6 Gas grading pressurization quick recovery device - Google Patents
SF (sulfur hexafluoride) 6 Gas grading pressurization quick recovery device Download PDFInfo
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- CN217482510U CN217482510U CN202220903740.6U CN202220903740U CN217482510U CN 217482510 U CN217482510 U CN 217482510U CN 202220903740 U CN202220903740 U CN 202220903740U CN 217482510 U CN217482510 U CN 217482510U
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Abstract
SF (sulfur hexafluoride) 6 A gas grading pressurization quick recovery device belongs to the SF of a transformer substation 6 Gas recovery technical field, solutionHow to rapidly and completely recover the large-gas-quantity SF 6 Gaseous problem, the technical scheme of the utility model set up fourth pressure sensor P4 at the input of device, real-time detection preceding stage SF 6 The pressure in the gas chamber of the gas insulation equipment is divided into three modes for SF according to different measured pressure grades 6 Gas recovery: two SF when in positive pressure high recovery mode 6 The gas compressor works simultaneously, so that the recovery speed is improved; in a low-pressure recovery mode, an SF 6 The gas compressor works, so that the recovery requirement is met, the safety of equipment is guaranteed, and electric energy is saved; in the negative pressure recovery mode, the vacuum compressor ZKJ is in contact with the first SF 6 Gas compressor working simultaneously, SF 6 SF in gas chambers of gas-insulated apparatus 6 The gas is completely pumped out, thereby avoiding the environmental pollution.
Description
Technical Field
The utility model belongs to the SF of the transformer substation 6 The technical field of gas recovery, and relates to SF 6 Gas staged pressurization rapid recovery device.
Background
With the rapid development of the global energy Internet, a large amount of SF 6 The gas insulation equipment is generally used on ultrahigh voltage, extra-high voltage and totally-enclosed combined electrical appliances. SF 6 Obvious greenhouse effect, is one of six greenhouse gases clearly pointed out in the Kyoto protocol of climate Change framework convention of United nations, and is bound to deal with SF 6 The gas is recycled, treated and reused, and the environmental protection requirement is met. Meanwhile, for ultra-high voltage and extra-high voltage SF 6 Gas insulation equipment and totally-enclosed combined electrical apparatus, in the projects of troubleshooting, extension and the like, because of their SF 6 The amount of gas in the chamber is large, and therefore, an SF is urgently required 6 The gas staged pressurization quick recovery device can quickly and completely recover during the recovery operationGround recovery large gas quantity SF 6 A gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to design a SF 6 Gas staged pressurization rapid recovery device for solving ultra-high pressure and extra-high pressure SF 6 When the gas insulation equipment and the totally-enclosed combined electrical apparatus are in fault maintenance and extension projects, the large-gas-quantity SF is required to be rapidly and completely recovered 6 The problem of gas.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
SF (sulfur hexafluoride) 6 Gas staged pressurization fast recovery device, a first self-sealing joint ZF1, a first manual valve S1, a fourth electromagnetic valve V4, a fourth pressure sensor P4, a pressure stabilizing filter GLQ, a first safety valve SV1, a sixth electromagnetic valve V6, an electromagnetic valve DV1, a vacuum compressor ZKJ, an electromagnetic valve DV2, a first SF 1 6 Gas compressor QTJ1, second SF 6 The gas compressor QTJ2, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, a second safety valve SV2, an eleventh electromagnetic valve V11, a second manual valve S2 and a second self-sealing joint ZF 2;
one end of the first manual valve S1 is in sealing connection with the first self-sealing joint ZF1, the other end of the first manual valve S1 is in sealing connection with one end of the fourth electromagnetic valve V4, the other end of the fourth electromagnetic valve V4 is in sealing connection with the input end of the voltage stabilizing filter GLQ, the fourth pressure sensor P4 is installed on a pipeline between the fourth electromagnetic valve V4 and the voltage stabilizing filter GLQ in a sealing mode, the output end of the voltage stabilizing filter GLQ is in sealing connection with one end of the sixth electromagnetic valve V6, and the other end of the sixth electromagnetic valve V6 is in sealing connection with the first SF 1 6 Input end of gas compressor QTJ1 is hermetically connected, first SF 6 The output end of the gas compressor QTJ1 is hermetically connected with one end of a ninth electromagnetic valve V9, the other end of the ninth electromagnetic valve V9 is hermetically connected with one end of an eleventh electromagnetic valve V11, the other end of the eleventh electromagnetic valve V11 is hermetically connected with one end of a second manual valve S2, and the other end of the second manual valve S2 is hermetically connected with a second self-sealing joint ZF 2;
one end of the electromagnetic valve DV1 is hermetically connected between the stabilizing filter GLQ and the sixth electromagnetic valve V6, and the other end of the electromagnetic valve DV1 is connected with the pressure stabilizing filter GLQThe input end of the vacuum compressor ZKJ is hermetically connected, the output end of the vacuum compressor ZKJ is hermetically connected with one end of the electromagnetic valve DV2, and the other end of the electromagnetic valve DV2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the conduit between the gas compressors QTJ 1;
second SF 6 The input end of the gas compressor QTJ2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the line between the gas compressors QTJ1, second SF 6 The output end of the gas compressor QTJ2 is hermetically connected with one end of a tenth solenoid valve V10, and the other end of the tenth solenoid valve V10 is hermetically connected to a pipe between the ninth solenoid valve V9 and the eleventh solenoid valve V11.
The technical scheme of the utility model set up fourth pressure sensor P4 at the input of device, real-time detection preceding stage SF 4 6 The pressure in the gas chamber of the gas insulation equipment is divided into three modes for SF according to different measured pressure grades 6 Gas recovery: two SF when in positive pressure high recovery mode 6 The gas compressor works simultaneously, so that the recovery speed is improved; in a low-pressure recovery mode, an SF 6 The gas compressor works, so that the recovery requirement is met, the safety of equipment is guaranteed, and electric energy is saved; in the negative pressure recovery mode, the vacuum compressor ZKJ is in contact with the first SF 6 Gas compressor working simultaneously, SF 6 SF in gas chamber of gas insulated apparatus 6 The gas is completely pumped out, thereby avoiding the environmental pollution.
Further, still include: and a first safety valve SV1, wherein the first safety valve SV1 is hermetically arranged on a pipeline between the pressure stabilizing filter GLQ and the sixth electromagnetic valve V6.
Further, the method also comprises the following steps: and a second safety valve SV2, wherein the second safety valve SV2 is hermetically arranged on a pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11.
Further, the method also comprises the following steps: a fifth electromagnetic valve V5 and a third self-sealing joint ZF 3; one end of the fifth electromagnetic valve V5 is connected between the first manual valve S1 and the fourth electromagnetic valve V4 in a sealing mode, and the other end of the fifth electromagnetic valve V5 is connected with the third self-sealing joint ZF3 in a sealing mode.
Further, the method also comprises the following steps: a seventh electromagnetic valve V7, a residual gas collection tank SJG and a twelfth electromagnetic valve V12; one end of the seventh electromagnetic valve V7 is hermetically connected to a pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ, the other end of the seventh electromagnetic valve V7 is hermetically connected with the output end of the residual gas collecting tank SJG, one end of the twelfth electromagnetic valve V12 is hermetically connected to the input end of the residual gas collecting tank SJG, and the other end of the twelfth electromagnetic valve V12 is hermetically connected to a pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11.
Further, the method also comprises the following steps: a fifth pressure sensor P5, said fifth pressure sensor P5 being sealingly mounted in the first SF 6 On the conduit between the gas compressor QTJ1 and the ninth solenoid valve V9.
Further, still include: a sixth pressure sensor P6, said sixth pressure sensor P6 being sealingly mounted in the second SF 6 On the conduit between the gas compressor QTJ2 and the tenth solenoid valve V10.
Further, still include: and a seventh pressure sensor P7, wherein the seventh pressure sensor P7 is hermetically arranged at the top of the residual gas collecting tank SJG.
The utility model has the advantages that:
1) the technical scheme of the utility model set up fourth pressure sensor P4 at the input of device, real-time detection preceding stage SF 4 6 The pressure in the gas chamber of the gas insulation equipment is divided into three modes for SF according to different measured pressure grades 6 Gas recovery: two SF when in positive pressure high recovery mode 6 The gas compressor works simultaneously, so that the recovery speed is improved; in a low-pressure recovery mode, an SF 6 The gas compressor works, so that the recovery requirement is met, the safety of equipment is guaranteed, and electric energy is saved; in the negative pressure recovery mode, the vacuum compressor ZKJ is in contact with the first SF 6 Gas compressor working simultaneously, SF 6 SF in gas chamber of gas insulated apparatus 6 The gas is completely pumped out, thereby avoiding the environmental pollution.
2) The residual SF in the pipeline is designed to be recovered 6 The gas enters a residual gas collecting tank SJG for storage through a twelfth electromagnetic valve V12, so that a pipeline is further preventedIn the presence of residual SF 6 The gas avoids polluting the environment.
Drawings
FIG. 1 shows an SF according to a first embodiment of the present invention 6 The structure of the gas grading pressurization quick recovery device.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below in combination with the technical solution of the embodiments of the present invention, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
The technical solution of the present invention is further described with reference to the drawings and specific embodiments:
example one
As shown in FIG. 1, a SF 6 Gaseous hierarchical pressure boost quick recovery unit includes: a first self-sealing joint ZF1, a first manual valve S1, a fourth electromagnetic valve V4, a fourth pressure sensor P4, a pressure stabilizing filter GLQ, a first safety valve SV1, a sixth electromagnetic valve V6, an electromagnetic valve DV1, a vacuum compressor ZKJ, an electromagnetic valve DV2, a first SF 6 Gas compressor QTJ1, second SF 6 The system comprises a gas compressor QTJ2, a fifth pressure sensor P5, a sixth pressure sensor P6, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, a second safety valve SV2, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, a second manual valve S2, a second self-sealing joint ZF2, a seventh pressure sensor P7, a residual gas collection tank SJG, a fifth electromagnetic valve V5, a seventh electromagnetic valve V7 and a third self-sealing joint ZF 3.
One end of the first manual valve S1 is connected with a first self-sealing joint ZF1 in a sealing way through a pipeline, the other end of the first manual valve S1 is connected with one end of a fourth electromagnetic valve V4 in a sealing way through a pipeline, the other end of the fourth electromagnetic valve V4 is connected with the input end of a voltage-stabilizing filter GLQ in a sealing way through a pipeline, and the voltage-stabilizing filter GLQ is connected with the input end of the voltage-stabilizing filter GLQ in a sealing wayThe output end of the first solenoid valve is hermetically connected with one end of a sixth solenoid valve V6 through a pipeline, and the other end of the sixth solenoid valve V6 is hermetically connected with the first SF 6 The input end of the gas compressor QTJ1 is hermetically connected by a pipe, the first SF 6 The output end of the gas compressor QTJ1 is in sealed connection with one end of a ninth electromagnetic valve V9 through a pipeline, the other end of the ninth electromagnetic valve V9 is in sealed connection with one end of an eleventh electromagnetic valve V11 through a pipeline, the other end of the eleventh electromagnetic valve V11 is in sealed connection with one end of a second manual valve S2 through a pipeline, the other end of the second manual valve S2 is in sealed connection with a second self-sealing joint ZF2 through a pipeline, one end of an electromagnetic valve DV1 is in sealed connection between a voltage stabilizing filter GLQ and a sixth electromagnetic valve V6 through a pipeline, the other end of the electromagnetic valve DV1 is in sealed connection with the input end of a vacuum compressor ZKJ through a pipeline, the output end of the vacuum compressor ZKJ is in sealed connection with one end of an electromagnetic valve DV2 through a pipeline, and the other end of the electromagnetic valve DV2 is in sealed connection between a sixth electromagnetic valve V6 and a first SF 6 6 On the conduit between the gas compressors QTJ 1; second SF 6 The input end of the gas compressor QTJ2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the pipeline between the gas compressors QTJ1, second SF 6 The output end of the gas compressor QTJ2 is hermetically connected with one end of a tenth solenoid valve V10 through a pipeline, and the other end of the tenth solenoid valve V10 is hermetically connected to a pipeline between a ninth solenoid valve V9 and an eleventh solenoid valve V11; a fourth pressure sensor P4 is hermetically mounted on the pipeline between the fourth solenoid valve V4 and the surge filter GLQ, and a first safety valve SV1 is hermetically mounted on the pipeline between the surge filter GLQ and the sixth solenoid valve V6; a fifth pressure sensor P5 is sealingly mounted in the first SF 6 A sixth pressure sensor P6 is hermetically mounted on the pipe between the gas compressor QTJ1 and the ninth solenoid valve V9 in the second SF 6 A second safety valve SV2 is hermetically arranged on the pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11 on the pipeline between the gas compressor QTJ2 and the tenth electromagnetic valve V10;
one end of a fifth electromagnetic valve V5 is hermetically connected between the first manual valve S1 and the fourth electromagnetic valve V4 through a pipeline, and the other end of the fifth electromagnetic valve V5 is hermetically connected with a third self-sealing joint ZF3 through a pipeline;
one end of a seventh electromagnetic valve V7 is hermetically connected to a pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ through a pipeline, the other end of the seventh electromagnetic valve V7 is hermetically connected to the output end of a residual gas collecting tank SJG through a pipeline, one end of a twelfth electromagnetic valve V12 is hermetically connected to the input end of the residual gas collecting tank SJG through a pipeline, the other end of the twelfth electromagnetic valve V12 is hermetically connected to a pipeline between a ninth electromagnetic valve V9 and an eleventh electromagnetic valve V11, and a seventh pressure sensor P7 is hermetically installed at the top of the residual gas collecting tank SJG.
Workflow process
1. Vacuum pumping self-cleaning
And (3) hermetically connecting a vacuumizing device at a third self-sealing joint ZF3, opening a fourth electromagnetic valve V4, a fifth electromagnetic valve V5, a sixth electromagnetic valve V6, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, an eleventh electromagnetic valve V11, a twelfth electromagnetic valve V12, an electromagnetic valve DV1 and an electromagnetic valve DV2, starting the vacuumizing device to vacuumize the pipeline, closing the vacuumizing device when the vacuum degree meets the requirement, closing the fourth electromagnetic valve V4, the fifth electromagnetic valve V5, the sixth electromagnetic valve V6, the ninth electromagnetic valve V9, the tenth electromagnetic valve V10, the eleventh electromagnetic valve V11, the twelfth electromagnetic valve V12, the electromagnetic valve DV1 and the DV2, and closing all valves after the pipeline self-cleaning by vacuumizing is finished.
2. For SF 6 SF in gas chamber of gas insulated apparatus 6 To carry out the recovery
The first self-sealing joint ZF1 adopts a high-pressure corrugated pipe and a field SF 6 The gas-insulated apparatus is hermetically connected, and at this time, the first manual valve S1, the fourth electromagnetic valve V4 and the fourth pressure sensor P4 are opened for measuring SF 6 The pressure in the gas chamber of the gas insulation equipment is divided into three modes for SF according to different measured pressure grades 6 Gas recovery;
1) positive pressure high recovery mode
When P4 is more than or equal to 0.3MPa, SF 6 SF in gas chamber of gas insulated apparatus 6 The amount of gas is large, and the first SF is started at the same time 6 Gas compressor QTJ1, second SF 6 Gas compressor QTJ2 for co-pumping SF 6 SF in gas chambers of gas-insulated apparatus 6 Gas, two SF 6 The gas compressor works simultaneously, and the recovery speed is improved.
2) Positive pressure low recovery mode
When P4 is more than or equal to 0.08MPa and less than or equal to 0.3MPa, SF 6 SF in gas chamber of gas insulated apparatus 6 The gas quantity is less, only the first SF is started 6 Gas compressor QTJ1 or second SF 6 One of the gas compressors QTJ2 for extracting SF 6 SF in gas chambers of gas-insulated apparatus 6 The gas meets the recycling requirement, ensures the safety of the equipment and saves electric energy.
3) Negative pressure recovery mode
When P4 < 0.08MPa, then SF 6 Also small amounts of SF are present in the gas chamber of the gas-insulated apparatus 6 Gas due to SF 6 The gas is greenhouse effect gas and needs to be completely pumped out, at the moment, the sixth manual valve S6 is closed, the electromagnetic valves DV1 and DV2 are opened, the vacuum compressor ZKJ is opened, and the first SF is opened 6 Gas compressor QTJ1 (or second SF) 6 Gas compressor QTJ2), for SF 6 Vacuumizing the gas chamber of the gas insulation equipment, and turning off the vacuum compressor ZKJ and the first SF when detecting that P4 is less than-0.04 MPa 6 Gas compressor QTJ1 (or second SF) 6 Gas compressor QTJ2) and closes all valves.
At the first SF 6 Gas compressor QTJ1, second SF 6 The output of the gas compressor QTJ2 is provided with a fifth pressure sensor P5 and a sixth pressure sensor P6 for monitoring the first SF 6 Gas compressor QTJ1, second SF 6 Pressure at output of gas compressor QTJ2 when first SF 6 Gas compressor QTJ1, second SF 6 Immediate shutdown of SF when pressure at the output of gas compressor QTJ2 exceeds limits 6 Gas compressor to protect first SF 6 Gas compressor QTJ1, second SF 6 A gas compressor QTJ 2.
3. Residual gas recovery
SF 6 After all the pumps are completed, the first manual valve S1, the fourth electromagnetic valve V4, the sixth electromagnetic valve V6, the ninth electromagnetic valve V9 and the twelfth electromagnetic valve V12 are openedStarting the first SF 6 Gas compressor QTJ1 for residual SF in the pipeline 6 Gas is recycled, and residual SF 6 Gas enters a residual gas collection tank SJG for storage through a twelfth electromagnetic valve V12, and after residual gas is completely recovered, the first SF is closed 6 A gas compressor QTJ1 and various valves; in the positive pressure low recovery mode, the seventh electromagnetic valve V7 is opened to supply SF in the residual gas collecting tank SJG 6 And (4) recovering the gas.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. SF (sulfur hexafluoride) 6 The gas staged pressurization quick recovery device is characterized by comprising a first self-sealing joint ZF1, a first manual valve S1, a fourth electromagnetic valve V4, a fourth pressure sensor P4, a pressure stabilizing filter GLQ, a first safety valve SV1, a sixth electromagnetic valve V6, an electromagnetic valve DV1, a vacuum compressor ZKJ, an electromagnetic valve DV2, a first SF 2 6 Gas compressor QTJ1, second SF 6 The system comprises a gas compressor QTJ2, a ninth electromagnetic valve V9, a tenth electromagnetic valve V10, a second safety valve SV2, an eleventh electromagnetic valve V11, a second manual valve S2 and a second self-sealing joint ZF 2;
one end of the first manual valve S1 is in sealing connection with the first self-sealing joint ZF1, the other end of the first manual valve S1 is in sealing connection with one end of the fourth electromagnetic valve V4, the other end of the fourth electromagnetic valve V4 is in sealing connection with the input end of the voltage stabilizing filter GLQ, the fourth pressure sensor P4 is installed on a pipeline between the fourth electromagnetic valve V4 and the voltage stabilizing filter GLQ in a sealing mode, the output end of the voltage stabilizing filter GLQ is in sealing connection with one end of the sixth electromagnetic valve V6, and the other end of the sixth electromagnetic valve V6 is in sealing connection with the first SF 1 6 Input end of gas compressor QTJ1 is hermetically connected, first SF 6 The output end of the gas compressor QTJ1 is hermetically connected with one end of a ninth electromagnetic valve V9, the other end of the ninth electromagnetic valve V9 is hermetically connected with one end of an eleventh electromagnetic valve V11, the other end of the eleventh electromagnetic valve V11 is hermetically connected with one end of a second manual valve S2, and the other end of the second manual valve S2 is hermetically connected with a second self-sealing joint ZF 2;
one end of the electromagnetic valve DV1 is hermetically connected between the pressure stabilizing filter GLQ and the sixth electromagnetic valve V6, the other end of the electromagnetic valve DV1 is hermetically connected with the input end of the vacuum compressor ZKJ, the output end of the vacuum compressor ZKJ is hermetically connected with one end of the electromagnetic valve DV2, and the other end of the electromagnetic valve DV2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the conduit between the gas compressors QTJ 1;
second SF 6 The input end of the gas compressor QTJ2 is hermetically connected with the sixth electromagnetic valve V6 and the first SF 6 On the line between the gas compressors QTJ1, second SF 6 The output end of the gas compressor QTJ2 is hermetically connected with one end of a tenth solenoid valve V10, and the other end of the tenth solenoid valve V10 is hermetically connected to a pipe between the ninth solenoid valve V9 and the eleventh solenoid valve V11.
2. SF according to claim 1 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: and a first safety valve SV1, wherein the first safety valve SV1 is hermetically arranged on a pipeline between the pressure stabilizing filter GLQ and the sixth electromagnetic valve V6.
3. SF according to claim 1 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: and the second safety valve SV2 is mounted on the pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11 in a sealing way by the SV 2.
4. SF according to claim 1 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: a fifth electromagnetic valve V5 and a third self-sealing joint ZF 3; one end of the fifth electromagnetic valve V5 is hermetically connected with the first manual valve S1 and the second manual valveThe other end of the fifth electromagnetic valve V5 is connected with the third self-sealing joint ZF3 in a sealing way between the fourth electromagnetic valve V4.
5. SF according to claim 1 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: a seventh electromagnetic valve V7, a residual gas collection tank SJG and a twelfth electromagnetic valve V12; one end of the seventh electromagnetic valve V7 is hermetically connected to a pipeline between the fourth electromagnetic valve V4 and the pressure stabilizing filter GLQ, the other end of the seventh electromagnetic valve V7 is hermetically connected with the output end of the residual gas collecting tank SJG, one end of the twelfth electromagnetic valve V12 is hermetically connected to the input end of the residual gas collecting tank SJG, and the other end of the twelfth electromagnetic valve V12 is hermetically connected to a pipeline between the ninth electromagnetic valve V9 and the eleventh electromagnetic valve V11.
6. SF according to claim 1 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: a fifth pressure sensor P5, said fifth pressure sensor P5 being sealingly mounted in the first SF 6 On the conduit between the gas compressor QTJ1 and the ninth solenoid valve V9.
7. SF according to claim 1 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: a sixth pressure sensor P6, said sixth pressure sensor P6 being sealingly mounted in the second SF 6 On the conduit between the gas compressor QTJ2 and the tenth solenoid valve V10.
8. SF according to claim 5 6 Gaseous hierarchical pressure boost quick recovery unit, its characterized in that still includes: and a seventh pressure sensor P7, wherein the seventh pressure sensor P7 is hermetically arranged at the top of the residual gas collecting tank SJG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220903740.6U CN217482510U (en) | 2022-04-19 | 2022-04-19 | SF (sulfur hexafluoride) 6 Gas grading pressurization quick recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220903740.6U CN217482510U (en) | 2022-04-19 | 2022-04-19 | SF (sulfur hexafluoride) 6 Gas grading pressurization quick recovery device |
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| CN217482510U true CN217482510U (en) | 2022-09-23 |
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| CN202220903740.6U Active CN217482510U (en) | 2022-04-19 | 2022-04-19 | SF (sulfur hexafluoride) 6 Gas grading pressurization quick recovery device |
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