CN209311430U - Gas on-line monitoring system - Google Patents
Gas on-line monitoring system Download PDFInfo
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- CN209311430U CN209311430U CN201822124895.6U CN201822124895U CN209311430U CN 209311430 U CN209311430 U CN 209311430U CN 201822124895 U CN201822124895 U CN 201822124895U CN 209311430 U CN209311430 U CN 209311430U
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- gas
- gas circuit
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- solenoid ball
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Abstract
Gas on-line monitoring system, including sample and recharge gas circuit and cycle detection gas circuit；Cycle detection gas circuit is ring seal gas circuit, is disposed with first liang of logical Solenoid ball valve, second liang of logical Solenoid ball valve, flowmeter, small flow air pump, detection instrument, first pressure transmitter, surge tank and big flow air pump along airflow direction in cycle detection gas circuit；Flow is calculated as the flowmeter of adjustable flow；The air inlet for sampling and recharging gas circuit is connected with sulfur hexafluoride gas source, and the gas outlet for sampling and recharging gas circuit is connected between first liang of logical Solenoid ball valve of cycle detection gas circuit and second liang of logical Solenoid ball valve.The utility model is used and is sampled from high-tension switch gear, recycle sampling gas in detection gas circuit, it is finally pressed into the on-line monitoring mode of high-tension switch gear, the existing sampling gas existing for pressure measurement method online is can avoid and does not have the drawbacks of representative, reliable measuring data is difficult to ensure.
Description
Technical field
The utility model belongs to gas detection technology field, and in particular to a kind of gas on-line monitoring system.
Background technique
Sulfur hexafluoride (SF6) gas have excellent insulation and arc extinction performance, can greatly reduce and set as dielectric
Standby size, therefore it is widely used in gas insulation breaker, gas insulated combined electrical equipment (Gas Iusulated Sub
Station, GIS), transformer, in the various electrical equipments such as mutual inductor.Pure SF6Chemical property is stablized, under normal condition
It is not easily decomposed.However, due to SF6Air insulating device is likely to occur various defects in manufacture, installation or operation, and then occurs
Electric discharge (arc discharge, spark discharge, shelf depreciation) and overheating fault, lead to SF6Gas is decomposed, and a variety of low fluorine sulphur are generated
Compound, these low-fluorine sulfides can generate hydrogen fluoride (HF), titanium dioxide with impurity such as micro-moisture, oxygen existing for equipment inside
Sulphur (SO2), hydrogen sulfide (H2S), it is fluorinated thionyl (SOF2), fluorination sulfonyl (SO2F2) etc. compounds.If electric discharge phenomena appear in solid
Near body dielectric, CF will additionally generate4、CO、CO2Deng decomposition combination product.The features such as its content, generating rate are and equipment
Built-in electrical insulation degradation has very close relationship, can be used as the foundation for judging insulator arrangement early stage Hidden fault.
According to the regulation of relevant criterion, running sulfur hexafluoride (SF6) outlet openings equipment, it needs to monitor on-line inside it
The impurity contents such as purity, humidity (micro- water), the decomposition product of gas.Due to being to measure online in pressure, measurement is installation point
Neighbouring gas does not have representativeness, so, the reliability of measurement data is just difficult to ensure.
Utility model content
The utility model in order to solve shortcoming in the prior art, provide a kind of structure it is simple, convenient for operation, data
The strong gas on-line monitoring system of Measurement reliability.
In order to solve the above technical problems, the utility model adopts the following technical solution: gas on-line monitoring system, including take
Sample and recharge gas circuit and cycle detection gas circuit；
Cycle detection gas circuit is ring seal gas circuit, is disposed with first liang along airflow direction in cycle detection gas circuit and leads to
Solenoid ball valve, second liang of logical Solenoid ball valve, flowmeter, small flow air pump, detection instrument, first pressure transmitter, surge tank and
Big flow air pump；Flow is calculated as the flowmeter of adjustable flow；
The air inlet for sampling and recharging gas circuit is connected with sulfur hexafluoride gas source, and the gas outlet for sampling and recharging gas circuit is connected to
Between the first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve of cycle detection gas circuit.
It samples and recharges and be disposed with shut-off valve, second pressure transmitter and the energization of third two along airflow direction in gas circuit
Magnetic ball valve.
Detection instrument is sulfur hexafluoride gas humidity measurement instrument, sulphur hexafluoride gas purity detector or sulfur hexafluoride gas
The set of decomposed product detector or any two above-mentioned detectors or three kinds of detectors.
By adopting the above technical scheme, the monitoring method of gas on-line monitoring system, includes the following steps,
(1) shut-off valve, third two are opened and leads to Solenoid ball valve and second liang of logical Solenoid ball valve, gas to be detected is from lithium
The outflow of sulphur gas source flows into cycle detection gas circuit along sampling and recharging gas circuit；
(2) sulfur hexafluoride gas successively passes through in second liang of logical Solenoid ball valve, flowmeter and detection instrument, is flowed into gas storage
In tank；
(3) it is then shut off third two and leads to Solenoid ball valve, open first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve, open
Small flow air pump is moved, gas recycles in cycle detection gas circuit under the effect of small flow air pump, until detection instrument detected value is steady
It is fixed；
(4) then, it opens third two and leads to Solenoid ball valve, shut-off valve, close first liang of logical Solenoid ball valve, open big flow gas
It pumps, the gas in cycle detection gas circuit is recharged under the effect of big flow air pump into sulfur hexafluoride gas source to be detected.
(5) 3-5 step (1)-(4) are repeated, multiple detected values are obtained, improve detection accuracy.
First liang of logical Solenoid ball valve, second liang of logical Solenoid ball valve and third two lead to the switch of Solenoid ball valve in the utility model
It is realized and is automatically controlled by PLC control system.The sulfur hexafluoride gas flow velocity of flowmeter control sampling.When detection finishes needs
When sulfur hexafluoride gas is pushed back switchgear, air accumulator is used to cache the gas after detection, when pressure reaches certain value
When, start big flow air pump, the gas in cycle detection gas circuit is pushed back in sulfur hexafluoride gas source (high-tension switch gear).
The utility model recycles sampling gas in detection gas circuit, is finally pressed into using sampling from high-tension switch gear
The on-line monitoring mode of high-tension switch gear can avoid the existing sampling gas existing for pressure measurement method online and not have representative
The drawbacks of property, reliable measuring data is difficult to ensure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
As shown in Figure 1, the gas on-line monitoring system of the utility model, including sample and recharge gas circuit 1 and cycle detection
Gas circuit 2；
Cycle detection gas circuit 2 is ring seal gas circuit, is disposed with first liang along airflow direction in cycle detection gas circuit 2
Logical 3, second liang of logical Solenoid ball valves 4 of Solenoid ball valve, flowmeter 5, small flow air pump 6, detection instrument 7, first pressure transmitter 8,
Surge tank 9 and big flow air pump 10；Flowmeter 5 is the flowmeter of adjustable flow；
The air inlet for sampling and recharging gas circuit 1 is connected with sulfur hexafluoride gas source 14, and the gas outlet for sampling and recharging gas circuit 1 connects
It connects between first liang of logical Solenoid ball valve 3 of cycle detection gas circuit 2 and second liang of logical Solenoid ball valve 4.
It samples and recharges and be disposed with shut-off valve 11, second pressure transmitter 12 and third along airflow direction in gas circuit 1
Two logical Solenoid ball valves 13.
Detection instrument 7 is sulfur hexafluoride gas humidity measurement instrument, sulphur hexafluoride gas purity detector or sulfur hexafluoride gas
The set of body decomposed product detector or any two above-mentioned detectors or three kinds of detectors.
The monitoring method of gas on-line monitoring system, comprising the following steps:
(1) shut-off valve 11, third two are opened and leads to Solenoid ball valve 13 and second liang of logical Solenoid ball valve 4, gas to be detected from
Sulfur hexafluoride gas source 14 flows out, and flows into cycle detection gas circuit 2 along sampling and recharging gas circuit 1；
(2) sulfur hexafluoride gas successively passes through in second liang of logical Solenoid ball valve 4, flowmeter 5 and detection instrument 7, is flowed into
In air accumulator；
(3) it is then shut off third two and leads to Solenoid ball valve 13, open first liang of logical Solenoid ball valve 3 and second liang of logical Solenoid ball valve
4, start small flow air pump 6, gas recycles in cycle detection gas circuit 2 under the effect of small flow air pump 6, until detecting instrument 7
Detected value is stablized；
(4) then, it opens third two and leads to Solenoid ball valve 13, shut-off valve 11, close first liang of logical Solenoid ball valve 3, open big
Flow air pump 10, the gas in cycle detection gas circuit 2 are recharged under the effect of big flow air pump 10 to sulfur hexafluoride to be detected
In gas source 14.
(5) 3-5 step (1)-(4) are repeated, multiple detected values are obtained, improve detection accuracy.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., all foundations
The technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, belong to this reality
With the protection scope of new technique scheme.
Claims (3)
1. gas on-line monitoring system, it is characterised in that: including sampling and recharging gas circuit and cycle detection gas circuit；
Cycle detection gas circuit is ring seal gas circuit, is disposed with first liang of energization magnetic along airflow direction in cycle detection gas circuit
Ball valve, second liang of logical Solenoid ball valve, flowmeter, small flow air pump, detection instrument, first pressure transmitter, surge tank and big stream
Measure air pump；Flow is calculated as the flowmeter of adjustable flow；
The air inlet for sampling and recharging gas circuit is connected with sulfur hexafluoride gas source, and the gas outlet for sampling and recharging gas circuit is connected to circulation
Between the first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve for detecting gas circuit.
2. gas on-line monitoring system according to claim 1, it is characterised in that: sample and recharge in gas circuit along air-flow side
Lead to Solenoid ball valve to shut-off valve, second pressure transmitter and third two is disposed with.
3. gas on-line monitoring system according to claim 1, it is characterised in that: detection instrument is that sulfur hexafluoride gas is wet
Spend detector, sulphur hexafluoride gas purity detector or sulfur hexafluoride gas decomposed product detector or any two above-mentioned inspections
Survey the set of instrument or three kinds of detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124895.6U CN209311430U (en) | 2018-12-18 | 2018-12-18 | Gas on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124895.6U CN209311430U (en) | 2018-12-18 | 2018-12-18 | Gas on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209311430U true CN209311430U (en) | 2019-08-27 |
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ID=67677444
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822124895.6U Active CN209311430U (en) | 2018-12-18 | 2018-12-18 | Gas on-line monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358818A (en) * | 2021-04-29 | 2021-09-07 | 浙江丰合检测技术股份有限公司 | Industrial waste gas detection method |
-
2018
- 2018-12-18 CN CN201822124895.6U patent/CN209311430U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358818A (en) * | 2021-04-29 | 2021-09-07 | 浙江丰合检测技术股份有限公司 | Industrial waste gas detection method |
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