CN209400161U - A kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device - Google Patents
A kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device Download PDFInfo
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- CN209400161U CN209400161U CN201822165480.3U CN201822165480U CN209400161U CN 209400161 U CN209400161 U CN 209400161U CN 201822165480 U CN201822165480 U CN 201822165480U CN 209400161 U CN209400161 U CN 209400161U
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Abstract
The utility model belongs to equipment gas leak detection technology field; more particularly to a kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device; including high-pressure nitrogen bottle, pressure regulation pressure reducing valve, automatic overvoltage protective device, temperature sensor, pressure sensor, differential pressure transmitter, volumetric standard, gas collector, liquid discharge rate recyclable device, isolating valve, regulating valve, Precision Electronics Balance, data analysis and control system, performance measurement is sealed under the premise of MSR pilot valve is not dismantled.The utility model carrys out a kind of micro- released gas rate of MSR pilot valve of precise measurement using the method for calibration measurement pressure drop, with measurement accuracy height, highly reliable, operating cost is low, is easy to the advantages that development is repeated several times, and the leakage of automatic measurement MSR pilot valve gas may be implemented.
Description
Technical field
The utility model belongs to equipment gas leak detection technology field, and in particular to a kind of on-line automatic measurement MSR is first
Pilot valve gas tiny leakage detection method.
Background technique
Safety valve is a kind of automatic valve, it can pressure medium be more than preset safe pressure value in protected device
When automatically turn on, a certain amount of fluid is discharged, then in equipment pressure medium be down to or slightly below safe pressure value when, and from
It is dynamic to close, to play the role of protecting equipment.Safety valve plays the protective effect of last pass, important journey in equipment
It spends self-evident.According to laws and regulations requirement, safety valve need to periodically be sealed performance test, and the sealing of safety valve is quantitatively evaluated
Whether performance meets the requirements.Main means include using bubble counting method and hydrometry at present.Bubble counting method is from peace
Full valve outlet end collects the bubble of collection certain time using bubble to hunt leak, and the detection device used is all fairly simple, detection
Result reliability is not high.And for nuclear power plant's MSR pilot valve, outlet is connected directly to main valve epicoele, can not pass through at the scene
Outlet is collected bubble, then leakage rate can not be measured using bubble counting method.Hydrometry is injected surely into valve chamber
The gas medium of constant-pressure is arranged flowmeter in measurement inlet, measures the valve unit time by reading meter readings
Slip.General small flow loss can be measured using gas mass flow meter, but since MSR pilot valve leakage rate is smaller,
It is required that leakage is less than the tiny leakage of 5.9ml/min, the small gaseous mass flowmeter of the smallest monitoring that Weights and Measures Bureau can demarcate at present
Range is 20ml/min, is unable to satisfy requirement.Therefore, the utility model carrys out precise measurement using the method for calibration measurement pressure drop
A kind of micro- released gas rate of MSR pilot valve.
Note: MSR, that is, separator English is write a Chinese character in simplified form.
Utility model content
The purpose of the utility model is to provide a kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device,
MSR pilot valve is sealed performance measurement under the premise of not dismantling.
The utility model is realized in this way:
A kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device, including high-pressure nitrogen bottle, pressure regulation decompression
Valve, automatic overvoltage protective device, temperature sensor, pressure sensor, differential pressure transmitter, volumetric standard, gas collector, liquid
Body discharge rate recyclable device, isolating valve, regulating valve, Precision Electronics Balance, data analysis and control system etc..
The MSR pilot valve sealing property testing equipment is it is characterized by: measure MSR guide's valve inlet by automatic ration
The mode of pressure drop carries out quantitative measurment to MSR pilot valve gas tiny leakage, which includes test macro, automatically controls system
Auxiliaries, the test macro such as system and pipe fitting joint include main gas circuit and MSR pilot valve sealing property testing system, the master
Gas circuit provides stable test gas to the test of MSR pilot valve sealing performance, and test macro is provided with high-pressure nitrogen bottle, pressure regulation subtracts
Pressure valve, automatic overvoltage protective device, temperature sensor, pressure sensor, differential pressure transmitter, volumetric standard, gas collector,
Liquid discharge rate recyclable device, isolating valve, regulating valve, Precision Electronics Balance, data analysis and control system etc..
Detection method includes the following steps for the quantity of gas leakage:
1) demarcate the volume of volumetric standard: first measurement standard container adds the gross weight after water, and measurement standard container dead weight will be total
The volume that self weight obtains volumetric standard is subtracted again；Again by test amendment, obtains volumetric standard and connect the precise volumes of pipeline section；
2) it stability criterion vessel inlet pressure: by high-pressure nitrogen bottle and its pressure regulation pressure reducing valve of outlet, is mentioned for major loop
The gas pressure for for requiring；
3) measurement of pressure difference: when the test macro pipeline of volumetric standard accesses High-accuracy differential pressure transmitter, and test starts,
The Hi-pot test end valve door and balanced valve for turning off differential pressure transmitter, when having gas leakage, differential pressure transmitter low-pressure end obtains signal,
The small pressure drop signal of test macro automatic collection；
4) calibration value of volumetric standard unit time leakage rate: by the top of the gas collector of gas leakage access full water
Portion is collected simultaneously the water squeezed out by gas leakage, and after being weighed by Precision Electronics Balance, is scaled the leakage body of gas
Product；
5) automatic control system calculates the corresponding leakage rate of volumetric standard pressure over time drop automatically.Examination is repeated several times
Test amount go forward side by side trip temperature amendment, accurately obtain the functional relation of pressure difference Yu gas tiny leakage amount；
6) when on-line measurement, test macro is accessed to the arrival end of MSR pilot valve to be measured, MSR pilot valve in certain time
Leakage rate can be calculated automatically by the pressure drop that data analysis and control system measure.
The beneficial effects of the utility model are:
The utility model is leaked using micro- gas that the method for calibration measurement pressure drop carrys out a kind of MSR pilot valve of precise measurement
Rate has measurement accuracy high, and highly reliable, operating cost is low, is easy to the advantages that development is repeated several times, and automatic measurement may be implemented
The leakage of MSR pilot valve gas.
Detailed description of the invention
Fig. 1 is the MSR pilot valve gas tiny leakage detection method flow diagram of the utility model；
Fig. 2 is the structural schematic diagram of the MSR pilot valve gas leak detection apparatus of the utility model.
Wherein: 1. high-pressure nitrogen bottles, 2. pressure regulation pressure reducing valves, 3. volumetric standards, 4. valve groups, 5. differential pressure transmitters, 6. is automatic
Overpressure protection apparatus, 7. temperature sensors, 8. pressure sensors, 9. isolating valves, 10. regulating valves, 11. gas collectors, 12.
Liquid discharge rate recyclable device, 13. Precision Electronics Balances, 14. leakage sections, 15. data analysis and control system.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the implementation case is implemented premised on technical solutions of the utility model, gives in detail
Thin embodiment and specific operating process, but the protection scope of the utility model is not limited to following case study on implementation.
The implementation case provides a kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device, including elevated pressure nitrogen
Gas cylinder 1, pressure regulation pressure reducing valve 2, volumetric standard 3, valve group 4, differential pressure transmitter 5, automatic overvoltage protective device 6, temperature sensor 7,
Pressure sensor 8, isolating valve 9, regulating valve 10, gas collector 11, liquid discharge rate recyclable device 12, Precision Electronics Balance
13, section 14 and data analysis and control system 15 are leaked.High-pressure nitrogen bottle 1 passes through one end of pipeline and pressure regulation pressure reducing valve 2
The other end of connection, pressure regulation pressure reducing valve 2 is connect by pipeline with the inlet end of volumetric standard 3；The outlet side of volumetric standard 3 passes through
Valve group 4 is connect with differential pressure transmitter 5.The low-pressure end of differential pressure transmitter 5 is connect by pipeline with automatic overvoltage protective device 6.Temperature
Degree sensor 7 and pressure sensor 8 are connect by pipeline with the outlet pipe of volumetric standard 3.Data analysis and control system
System 15 is connect by cable with differential pressure transmitter 5, automatic overvoltage protective device 6, temperature sensor 7 and pressure sensor 8 respectively.
Isolating valve 9 and regulating valve 10 are provided between the outlet side of volumetric standard 3 and one end of leakage section 14.Leak the another of section 14
End is connect by pipeline with one end of gas collector 11.The other end of gas collector 11 is discharged by pipeline and liquid
Recyclable device 12 is measured to connect.12 lower end of liquid discharge rate recyclable device is provided with Precision Electronics Balance 13, measurement gas collection dress
Set the weight for the liquid that 11 are discharged to liquid discharge rate recyclable device 12.
The valve group 4 is internally provided with Hi-pot test end valve door, low voltage experiment valve and balanced valve.
The data analysis and control system 15 are realized using PC machine.
The volume of the volumetric standard 3 is 0.5L.
The automatic overvoltage protective device 6 uses unloading valve.
The implementation case provides the testing scheme for the MSR pilot valve tiny leakage that medium is gas, and use is above-mentioned
Detection device specifically includes the following steps:
Step 1: the volume of calibration volumetric standard 3: the gross weight after first measurement standard container 3 plus water, measurement standard container 3
Gross weight is subtracted the volume that self weight obtains volumetric standard 3 by self weight；Again by test amendment, volumetric standard 3 and connection pipeline section are obtained
Precise volumes；
Step 2: 3 inlet pressure of stability criterion container: isolating valve 9 and regulating valve before being first turned off leakage section 14 before test
10, by high-pressure nitrogen bottle 1 and its pressure regulation pressure reducing valve 2 of outlet, the gas pressure of requirement is provided for major loop；
Step 3: the measurement of pressure difference: test start when, turn off differential pressure transmitter 5 on valve group 4 Hi-pot test end valve door and
Balanced valve, the isolating valve 9 before opening system leak section 14, slowly opens regulating valve 10, when there is gas leakage, differential pressure transmitter
4 obtain signal, are passed to data analysis and control system 15.
Step 4: the calibration value of 1 unit time of volumetric standard leakage rate: gas collector is accessed at the leakage end 14 of system
11 top, while the water squeezed out by gas leakage is collected with liquid discharge rate recyclable device 12, and pass through Precision Electronics Balance
After 13 are weighed, it is scaled the leakage volume of gas.
Step 5: pass through formula P0V0=P1V1, wherein P0To test initial pressure, i.e. high-pressure nitrogen bottle 1 is subtracted by pressure regulation
Pressure valve 2 is exported to the Preliminary pressure-filled of volumetric standard 3；V0For volumetric standard 3 volume and volumetric standard 3 between regulating valve 10
Conduit volume, P1For the pressure after leakage, V1For V0The sum of with leakage rate；It is automatic by data analysis and control system 15
Calculate volumetric standard pressure over time drop P0-P1Corresponding leakage rate.Be repeated several times test measurement go forward side by side trip temperature amendment,
Accurately obtain the functional relation of pressure difference Yu gas tiny leakage amount.
Test macro: when on-line measurement, being accessed the arrival end of MSR pilot valve to be measured by step 6, and MSR is first in certain time
The leakage rate of pilot valve can be calculated automatically by the pressure drop that data analysis and control system measure.
Automatic overvoltage protective device 6 plays overpressure protection function in systems, and temperature sensor 7 and pressure sensor 8 are being
Monitoring temperature and leakage section pressure change in system.
It is explained in detail above in conjunction with implementation method of the embodiment to utility model, but utility model is not limited to
Embodiment is stated, within the knowledge of a person skilled in the art, the utility model aims can also not departed from
Under the premise of various changes can be made.The content being not described in detail in the utility model specification can use the prior art.
Claims (5)
1. a kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device, it is characterised in that: it includes high-pressure nitrogen bottle
(1), pressure regulation pressure reducing valve (2), volumetric standard (3), valve group (4), differential pressure transmitter (5), automatic overvoltage protective device (6), temperature
Sensor (7), pressure sensor (8), isolating valve (9), regulating valve (10), gas collector (11), the recycling of liquid discharge rate
Device (12), Precision Electronics Balance (13), leakage section (14) and data analysis and control system (15)；High-pressure nitrogen bottle (1)
It is connect by pipeline with one end of pressure regulation pressure reducing valve (2), the other end of pressure regulation pressure reducing valve (2) passes through pipeline and volumetric standard (3)
Inlet end connection；The outlet side of volumetric standard (3) is connect by valve group (4) with differential pressure transmitter (5)；Differential pressure transmitter (5)
Low-pressure end connect with automatic overvoltage protective device (6) by pipeline；Temperature sensor (7) and pressure sensor (8) pass through pipe
Road is connect with the outlet pipe of volumetric standard (3)；Data analysis and control system (15) are become by cable and differential pressure respectively
Send device (5), automatic overvoltage protective device (6), temperature sensor (7) and pressure sensor (8) connection；In volumetric standard (3)
Isolating valve (9) and regulating valve (10) are provided between outlet side and the one end for leaking section (14)；The other end for leaking section (14) is logical
Pipeline is crossed to connect with one end of gas collector (11)；The other end of gas collector (11) is discharged by pipeline and liquid
Measure recyclable device (12) connection；It is provided with Precision Electronics Balance (13) in liquid discharge rate recyclable device (12) lower end, measures gas
Collection device (11) is discharged to the weight of the liquid of liquid discharge rate recyclable device (12).
2. on-line automatic measurement MSR pilot valve gas tiny leakage detection device according to claim 1, it is characterised in that:
The valve group (4) is internally provided with Hi-pot test end valve door, low voltage experiment valve and balanced valve.
3. on-line automatic measurement MSR pilot valve gas tiny leakage detection device according to claim 1, it is characterised in that:
The data analysis and control system (15) are realized using PC machine.
4. on-line automatic measurement MSR pilot valve gas tiny leakage detection device according to claim 1, it is characterised in that:
The volume of the volumetric standard (3) is 0.5L.
5. on-line automatic measurement MSR pilot valve gas tiny leakage detection device according to claim 1, it is characterised in that:
The automatic overvoltage protective device (6) uses unloading valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822165480.3U CN209400161U (en) | 2018-12-21 | 2018-12-21 | A kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822165480.3U CN209400161U (en) | 2018-12-21 | 2018-12-21 | A kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device |
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| CN209400161U true CN209400161U (en) | 2019-09-17 |
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| CN201822165480.3U Active CN209400161U (en) | 2018-12-21 | 2018-12-21 | A kind of on-line automatic measurement MSR pilot valve gas tiny leakage detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540418A (en) * | 2018-12-21 | 2019-03-29 | 核动力运行研究所 | The on-line automatic measurement MSR pilot valve gas tiny leakage detection device of one kind and method |
| CN114577413A (en) * | 2022-03-04 | 2022-06-03 | 中广核核电运营有限公司 | Isolation valve sealing test device |
-
2018
- 2018-12-21 CN CN201822165480.3U patent/CN209400161U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540418A (en) * | 2018-12-21 | 2019-03-29 | 核动力运行研究所 | The on-line automatic measurement MSR pilot valve gas tiny leakage detection device of one kind and method |
| CN114577413A (en) * | 2022-03-04 | 2022-06-03 | 中广核核电运营有限公司 | Isolation valve sealing test device |
| CN114577413B (en) * | 2022-03-04 | 2023-10-24 | 中广核核电运营有限公司 | Isolation valve tightness test device |
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