CN106813880A - Equipment leakage checking test and method under pressure environment maintenance condition - Google Patents
Equipment leakage checking test and method under pressure environment maintenance condition Download PDFInfo
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- CN106813880A CN106813880A CN201710208399.6A CN201710208399A CN106813880A CN 106813880 A CN106813880 A CN 106813880A CN 201710208399 A CN201710208399 A CN 201710208399A CN 106813880 A CN106813880 A CN 106813880A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3281—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell
- G01M3/329—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell for verifying the internal pressure of closed containers
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Abstract
System and heating experimental provision, water charging system is maintained to be connected as its moisturizing by moisturizing pipeline and water storage system the invention discloses a kind of equipment leakage checking test under pressure environment maintenance condition and method, including water charging system, water storage system, water level；Water storage system maintains system to be connected to maintain its water level constant by water pipeline and water level, and regulating valve and flowmeter are set on water pipeline, water level maintains system to be supplied water with heating experimental provision stable connection by connecting pipe, and connection stop valve is set on the connecting pipe；Heating experimental provision includes suppressing experiment container, suppress and heat generating components is provided with experiment container, the entry position for suppressing experiment container sets pressure transmitter, with the pressure value residing for real-time monitoring heat generating components, discharge line is installed in the outlet port for suppressing experiment container, discharge line end is provided with delivery stop valve；The tail end of discharge line is placed up inclined pipeline, range of tilt angles：20~60 °.
Description
Technical field
The present invention relates to a kind of nuclear equipment experiment field, and in particular to a kind of equipment under pressure environment maintenance condition is let out
Leak detection experimental system and method.
Background technology
Three major accidents that the contrast whole world has occurred are it can be found that by reactor core melt retention in pressure vessel, protect
The integrality of reactor pressure vessel is demonstrate,proved, can greatly alleviate the further development and deterioration of major accident.To existing elder generation
Enter in reactor fused mass heap to be detained on the basis of the digesting and assimilating of strategy, center group proposes setting Reactor cavity flooding cooling system
System, by active and passive two ways cooling pressure container low head, pressure vessel cavity of resorption is included in by reactor core fused mass
Interior, maintains pressure vessel integrality.Therefore, under severe accident conditions lower head of pressure vessel outer surface flowing heat transfer characteristic with
And critical heat flux density is the deciding factor for being detained success or not in fused mass heap.
In order to grasp low head outer surface flowing heat transfer characteristic and obtain lower head of pressure vessel outer surface critical heat flux
Density limit, in the urgent need to a kind of equipment leakage checking test under pressure environment maintenance condition and method, meet compared with
The leak detection cell demand of low design pressure equipment.
The content of the invention
It is to overcome the deficiencies in the prior art that the purpose of the present invention is, it is therefore intended that provide a kind of in pressure environment maintenance bar
Equipment leakage checking test and method under part, solve the pool steaming that prior art cannot function as laboratory or commercial Application
Water level holding meanss under the conditions of hair, it is impossible to meet the problem of the leak detection demand of the equipment of relatively low design pressure.
The present invention is achieved through the following technical solutions：
A kind of equipment leakage checking test under pressure environment maintenance condition, including water charging system, water storage system,
Water level maintains system and heating experimental provision, the water charging system to be connected as its moisturizing by moisturizing pipeline and water storage system；Storage
Water system maintains system to be connected to maintain its water level constant by water pipeline and water level, and regulating valve is set on water pipeline
And flowmeter, the water level maintenance system passes through connecting pipe and heating experimental provision stable connection supplies water, and in the connection
Connection stop valve is set on pipeline；The heating experimental provision includes suppressing experiment container, and described suppressing in experiment container is set
There is heat generating components, the entry position for suppressing experiment container sets pressure transmitter, with the pressure residing for real-time monitoring heat generating components
Value, discharge line is installed in the outlet port for suppressing experiment container, and the discharge line end is provided with delivery stop valve；
The tail end of described discharge line is placed up inclined pipeline, the angle model with vertical direction slanted angle
Enclose：20~60 °, the length of the pipeline that is inclined upwardly is less than or equal to 5m.
Further, the water charging system is logical includes moisturizing stop valve, small pump and moisturizing pipeline, the storage tank top
It is connected by moisturizing pipeline, small pump and moisturizing stop valve is set on moisturizing pipeline.
Further, described water storage system includes storage tank, and described storage tank side is provided with storage tank liquid level
Meter, storage tank overflow valve is provided with storage tank near the position at top.
Further, the water level maintains system to include water level and maintains case, and water is installed in described water level maintenance case side
Position maintains case liquid level gauge, maintains case to install water level near the position at top in water level and maintains case overflow valve.
Further, described storage tank, water level maintain case and connecting pipe bottom to be provided with blowoff valve, described row
Blowdown when dirty valve is used to clean；The blowoff valve that described connecting pipe is set near the position for suppressing experiment container entrance, at this
The blowoff valve of setting is used for draining.
The present invention is achieved through the following technical solutions：
A kind of equipment leakage test experience method under pressure environment maintenance condition, it is characterised in that including step：
Step 1：The diameter D of the discharge lineDischarge, according to the equivalent diameter De for suppressing experiment container outletSuppress experimental pieceReally
It is fixed, DDischarge=DeSuppress experimental piece；
If the absolute altitude of experiment container entrance is suppressed for 0m, if the absolute pressure scope needed for suppressing experiment container leak detection
It is P1~P2Pa, if P1<P2, if local atmospheric pressure is P0Pa, inquiring about physical property table according to pressure P1 can obtain single-phase watertight
It is ρ l kg/m3 to spend, then water level maintains the absolute altitude LMB in bottom faceWater level maintains caseCan be calculated by following formula：
The elevation of top LMT of discharge line (15) vertical sectionDischarge, can be determined by following formula：
The diameter D of connecting pipeConnectionAccording to the equivalent diameter De for suppressing experiment container outletSuppress experimental pieceIt is determined that, DConnection=
DeSuppress experimental piece；
It is LMB to keep storage tank bottom surface absolute altitudeStorage tankCan be calculated by following formula：
The diameter D of water pipelineSend water=DConnection；
The diameter D of moisturizing pipelineMoisturizingDetermined according to connecting pipe diameter, DMoisturizing=DConnection；And work as DConnectionDuring less than 50mm, to protect
Card moisturizing efficiency, moisturizing pipe diameter DMoisturizing=50mm；
Step 2：It is h that water level maintains the height of caseWater level maintains case, calculated by following formula：
To ensure the precise control of pressure, the cross section of water level maintenance case need to keep constant, its cross-sectional area SWater level maintains caseIf
It is set to 5~15 times and suppresses experiment container cross-sectional area SSuppress experimental piece, i.e. SWater level maintains case=(5~15) × SSuppress experimental piece；
Step 3：Delivery stop valve is opened, connection stop valve and regulating valve is closed, water level is opened and is maintained case overflow valve, water storage
Case overflow valve and moisturizing stop valve, start small pump, and storage tank moisturizing is given by moisturizing pipeline；By storage tank liquid level gauge, prison
Control water storage tank water level, when water storage tank water level reaches storage tank height 85%, closes small pump, closes moisturizing stop valve, stops
Moisturizing；
Connection stop valve is opened, regulating valve is opened, by pressure transmitter, experiment container pressure is suppressed in monitoring, and regulation is adjusted
Section aperture water filling, the pressure that experiment container is suppressed in holding rises, and climbing speed is less than for 5%/minute, and 5% refers to be detected setting
Highest detection pressure, the i.e. P2 reached needed for standby, 5%.
When suppressing experiment container pressure and reaching P1, regulating valve, finishing device connection, water filling are closed；
Step 4：Experiment container pressure is suppressed in change under the conditions of lower pressure carries out equipment leakage test experience.
Further, before described step 3 carries out water filling to experimental system, case is maintained to enter the storage tank and water level
Row cleaning, by corresponding blowoff valve blowdown, closes corresponding blowoff valve after the completion of cleaning.
Further, described step 4 changes under the conditions of lower pressure and suppresses experiment container pressure and carry out equipment leakage
Test experience；The pressure of experiment container is suppressed in lifting：By pressure transmitter, experiment container pressure, regulation regulation are suppressed in monitoring
Valve opening water filling, the pressure that experiment container is suppressed in holding rises, and climbing speed is less than for 1%/minute, and 1% refers to be detected setting
The 1% of the detection pressure reached needed for standby.When suppressing experiment container pressure and reaching required pressure value, regulating valve is closed, completed
Suppress the boost in pressure of experiment container.After completing the lifting of pressure or reducing, regulating valve is closed, experiment container is suppressed in monitoring
Pressure, when suppressing the pressure value that experiment container pressure is reduced within half an hour, during pressure value to be checked less than 5% highest, can be with
Think equipment No leakage.
Further, described step 4 changes under the conditions of lower pressure and suppresses experiment container pressure and carry out equipment leakage
Test experience；The pressure of experiment container is suppressed in reduction：By pressure transmitter, experiment container pressure is suppressed in monitoring；Opening is suppressed
The water level that floods of experiment container is suppressed in the blowoff valve of experiment container porch, reduction, and the pressure of experiment container is suppressed in reduction；Due to
There is the larger water level of cross-sectional area in loop and maintain case, therefore it is relatively low to suppress the rate of pressure change of experiment container；When suppressing
When experiment container pressure is reduced to required pressure value, blowoff valve is closed, the pressure reduction of experimental piece is suppressed in completion.
After completing the lifting of pressure or reducing, regulating valve is closed, the pressure of experiment container is suppressed in monitoring, when suppressing experiment
The pressure value that container pressure is reduced within half an hour, during pressure value to be checked less than 5% highest, it is believed that equipment No leakage,
It is leakage otherwise to suppress experiment container.
The present invention compared with prior art, has the following advantages and advantages：
The present invention is based on law of connected vessels, with reference to water level detecting, pressure detecting and flow detection, by a series of valves
Combine regulation, can steadily keep the water level of heat generating components under pool evaporation conditionses, and finely maintain residing for heat generating components
Pressure environment.Pressure environment accurately can also be maintained under the conditions of lower pressure, be easy to the equipment for relatively low design pressure
Experiment is suppressed in development, can carry out the experiment of suppressing of 0.1~10MPa of absolute pressure, and pressure maintains stabilization, and maintenance pressure environment need not
Pump, meets the leak detection demand of the equipment of relatively low design pressure.Can be used for detecting relatively low setting by technical solution of the present invention
Count the leakage situation of the equipment of pressure.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is that a kind of principle of equipment leakage checking test under pressure environment maintenance condition of the invention is illustrated
Figure；
Mark and corresponding parts title in accompanying drawing：
1. storage tank overflow valve；2. storage tank；3. storage tank liquid level gauge；4. regulating valve；5. flowmeter；6. water pipeline；
7. water level maintains case；8. water level maintains case liquid level gauge；9. blowoff valve；10. water level maintains case overflow valve；11. connection stop valves；
12. connecting pipes；13. pressure transmitters；14. heat generating components；15. discharge lines；16. delivery stop valves；17. moisturizings end
Valve；18. small pumps；19. moisturizing pipelines；20. suppress experiment container.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment 1
As shown in figure 1, a kind of equipment leakage checking test under pressure environment maintenance condition of the invention, including storage
Water tank 2, water level maintains case 7, back pressure water tank 20 and suppresses experiment container 20, and the described side of storage tank 2 is provided with storage tank liquid
Position meter 3, storage tank overflow valve 1 is provided with storage tank 2 near the position at top；Described water level maintains the side of case 7 to install water
Position maintains case liquid level gauge 8, maintains case 7 to install water level near the position at top in water level and maintains case overflow valve 10；Back pressure water tank 20
Back pressure high water tank meter 21 is installed in side, and back pressure water tank overflow valve 22 is installed near the position at top in back pressure water tank 20；Suppress
Heat generating components 14 is provided with experiment container 20；The bottom of storage tank 2 maintains the top of case 7 to connect by water pipeline 6 with water level
Connect, regulating valve 4 and flowmeter 5 are installed on water pipeline 6；Water level maintains the bottom of case 7 to lead to the entrance of experiment container 20 is suppressed
Cross connecting pipe 12 to connect, connection stop valve 11 is installed on connecting pipe 12；The entry position for suppressing experiment container 20 is set
Pressure transmitter 13, with the pressure value residing for real-time monitoring heat generating components 14, installs in the outlet port for suppressing experiment container 20
Discharge line 15,15 points of discharge line is vertical placement part and end section, will suppress the outlet and discharge of experiment container 20
The vertical portion of pipeline 15 is connected, and the top of storage tank 2 is connected by moisturizing pipeline 19, and the He of small pump 18 is set on moisturizing pipeline 19
Moisturizing stop valve 17.
Storage tank 2, water level maintains case 7 and the bottom of back pressure water tank 20 is provided with blowoff valve 9, and connecting pipe 12 is close to and suppresses reality
The position for testing the entrance of container 20 is also provided with blowoff valve 9, blowdown when blowoff valve 9 is used to clean.The tail end of discharge line 15 is set
Into acclivitous pipeline, the angular range with vertical direction slanted angle：20~60 °, the length of the pipeline that is inclined upwardly is less than
Equal to 5m.
A kind of equipment leakage checking test under pressure environment maintenance condition, can be smart under the conditions of lower pressure
Really maintain pressure environment, be easy to for relatively low design pressure equipment carry out bulge test, can carry out absolute pressure 0.1~
The bulge test of 10.0MPa, pressure maintains stabilization, maintains pressure environment without using pump, can meet setting for relatively low design pressure
Standby leak detection demand.
Condition of work of the present invention in the equipment leakage checking test under pressure environment maintenance condition：Aqueous medium or
Steam medium, normal pressure~10MPa, normal temperature~300 DEG C.
Mounting condition：Equipment leakage checking test under pressure environment maintenance condition is mountable to experimental loop,
Easy to operate, stable performance, pressure maintains stabilization, maintains pressure environment without pump, better economy.
Application：Equipment leakage checking test under pressure environment maintenance condition can be used as the pond of use for laboratory
Water level holding meanss under formula evaporation conditionses, accurately can maintain pressure environment under the conditions of lower pressure, be easy to be set for relatively low
The equipment for counting pressure carries out bulge test, meets the leak detection demand of the equipment of relatively low design pressure.
Embodiment 2
As shown in figure 1, a kind of equipment using above-mentioned experimental system lower pressure under delicate pressure environment maintenance condition
Leak detection experimental technique, meets the leak detection demand of the equipment of relatively low design pressure.
A kind of equipment leakage checking test of the lower pressure under pressure environment maintenance condition in embodiment 1 is pacified
Fill, connect and fixed
Install as needed first and experiment container 20 is suppressed in fixation, pressure is set in the entry position for suppressing experiment container 20
Power transmitter 13, the pressure value residing for experiment container 20 is suppressed with real-time monitoring.Pacify in the outlet port for suppressing experiment container 20
Dress discharge line 12, can not now utilize back pressure water tank 20, back pressure high water tank meter 21, back pressure water tank overflow valve 22, back pressure water
Case connecting tube 23.The outlet that experiment container 20 will be suppressed is connected with the vertical portion of discharge line 15.Installed on discharge line 15
Delivery stop valve 16, full off state is set to by delivery stop valve 16.
The diameter D of discharge line 15DischargeCan be according to the equivalent diameter De for suppressing the outlet of experiment container 20Suppress experimental pieceIt is determined that, DDischarge
=DeSuppress experimental piece。
If the absolute altitude for suppressing the entrance of experiment container 20 is 0m.Assuming that the absolute pressure needed for suppressing the leak detection of experiment container 20
Power scope is P1~P2Pa, it is assumed that P1<P2.Assuming that local atmospheric pressure is P0Pa (generally P0 ≈ 101325Pa.) root
According to pressure P1, inquiry physical property table can obtain single-phase water density for ρ l kg/m3.Then water level maintains the absolute altitude of the bottom surface of case 7
LMBWater level maintains caseCan be calculated by following formula：
The elevation of top LMT of the vertical section of discharge line 15Discharge, can be determined by following formula：
Install and fixed water level maintains case 7, it is LMB to keep water level to maintain the absolute altitude of the bottom surface of case 7Water level maintains case.Then in water level
Maintain the side of case 7 that water level is installed and maintain case liquid level gauge 8, maintain the bottom of case 7 that blowoff valve 9 is installed in water level, maintain case 7 to lean in water level
Water level is installed and maintains case overflow valve 10 in the position at nearly top.Water level maintains case liquid level gauge 8 to be maintained in case 7 for real-time monitoring water level
Liquid level, blowoff valve 9 is used for blowdown when water level maintains case 7 to clean, and water level maintains the case overflow valve 10 to be used to be arranged when water level is too high
Water conservation equipment.After water level maintains the installation of case 7, need to be cleaned, the blowdown of blowoff valve 9 be opened during cleaning, after the completion of cleaning
Blowoff valve 9 is closed, water level is closed and is maintained case overflow valve 10.
Water level maintains the bottom of case 7 to be connected by connecting pipe 12 with the entrance of experiment container 20 is suppressed, in connecting pipe 12
It is upper that connection stop valve 11 is installed, connection stop valve 11 is set to full off state.It is close in connecting pipe 12 and suppresses experiment container
The position of 20 entrances, installs blowoff valve 9.The blowdown of blowoff valve 9 is opened during pipeline cleaning, blowoff valve 9 is closed after the completion of cleaning.Connection
The length of pipeline 12 should try one's best shortening, the diameter D of connecting pipe 12ConnectionAccording to the equivalent diameter for suppressing the outlet of experiment container 20
DeSuppress experimental pieceIt is determined that, DConnection=DeSuppress experimental piece。
Install and fixed storage tank 2, it is LMB to keep the bottom surface absolute altitude of storage tank 2Storage tankCan be calculated by following formula：
Then storage tank liquid level gauge 3 is installed in the side of storage tank 2, blowoff valve 9 is installed in the bottom of storage tank 3, in storage tank 2
Position near top is installed by storage tank overflow valve 1.The liquid level that storage tank liquid level gauge 3 is used in real-time monitoring storage tank 2, blowdown
Valve 9 is used for blowdown when storage tank 2 is cleaned, and the overflow valve of storage tank 2 is used for the draining protection equipment when water level is too high.Storage tank 2 is pacified
After the completion of dress, need to be cleaned, the blowdown of blowoff valve 9 is opened during cleaning, blowoff valve 9 is closed after the completion of cleaning, closed storage tank and overflow
Stream valve 1.
The bottom of storage tank 1 maintains the top of case 7 to be connected by water pipeline 6 with water level, is installed on water pipeline 6 and adjusted
Section valve 4 and flowmeter 5, full off state is set to by regulating valve 4.The length of water pipeline 6 should try one's best shortening, water pipeline 6
Diameter DSend water=DConnection。
In device correct position, small pump 18 is set.The entrance of small pump 18 is connected with water source by moisturizing pipeline 19, is mended
Water pump 17 is exported and is connected by moisturizing pipeline 19 with the top of storage tank 2, and moisturizing stop valve 18 is set on moisturizing pipeline 19, will be mended
Water stop valve 18 is set to full off state.The diameter D of moisturizing pipeline 19MoisturizingCan be determined according to the diameter of connecting pipe 6, DMoisturizing=DConnection。
And work as DConnectionDuring less than 50mm, to ensure moisturizing efficiency, the diameter D of moisturizing pipeline 6Moisturizing=50mm.
The water level of determination maintains case 7, the physical dimension of storage tank 2
It is h that water level maintains the height of case 7Water level maintains case, can be calculated by following formula：
To ensure the precise control of pressure, the cross section of water level maintenance case 7 need to keep constant, its cross-sectional area SWater level maintains caseCan
The cross-sectional area S of experiment container 20 that suppresses for being set to 5~15 times suppresses experimental piece, i.e. SWater level maintains case=(5~15) × SSuppress experimental piece。
The sectional area and height of storage tank 2 do not require that simply the volume of storage tank 2 should be greater than water level and maintain case 7 individually
Volume, the volume of connecting pipe 12, suppress four volume sums such as experiment container 20 and the volume of discharge line 15.
Device connection, water filling
Delivery stop valve 16 is opened, connection stop valve 11 is closed, regulating valve 4 is closed, blowoff valve 9 at three is closed, water is opened
Position maintains case overflow valve 10, opens storage tank overflow valve 1, opens moisturizing stop valve 17, starts small pump 18, by moisturizing pipeline
19 give the moisturizing of storage tank 2.By storage tank liquid level gauge 3, the water level of storage tank 2 is monitored.When the water level of storage tank 2, to reach storage tank 2 high
During degree about 85%, small pump 18 is closed, close moisturizing stop valve 17, stop moisturizing.
Connection stop valve 11 is opened, regulating valve 4 is opened, by pressure transmitter 13, experimental piece pressure is suppressed in monitoring.Regulation
The aperture of regulating valve 4, slow water filling.The pressure that experiment container 20 is suppressed in holding slowly rises, and climbing speed is less than for 5%/minute.When
When suppressing the pressure of experiment container 20 and reaching P1, regulating valve 4 is closed.Finishing device connection, water filling.
Accurate under the conditions of lower pressure to maintain pressure environment, experiment is suppressed in the equipment development for relatively low design pressure,
Meet the leak detection demand of the equipment of relatively low design pressure
After device connection, water filling, water level is kept to maintain case overflow valve 10, connection stop valve 11, delivery stop valve 16 to open
Open, close blowoff valve 9 at three, close regulating valve 4, close moisturizing stop valve 17, you can accurately maintained under the conditions of lower pressure
Suppress the pressure environment of experiment container 20.
Under the conditions of lower pressure change suppress experimental piece pressure method it is as follows：
A. the pressure of experiment container 20 is suppressed in lifting：By pressure transmitter 13, the pressure of experiment container 20 is suppressed in monitoring.Adjust
The section aperture of regulating valve 4, slow water filling, the pressure that experiment container 20 is suppressed in holding slowly rises, and climbing speed is less than for 1%/minute.
When suppressing the pressure of experiment container 20 and reaching required pressure value, regulating valve 4 is closed, the pressure that experiment container 20 is suppressed in completion is carried
Rise.
B. the pressure for suppressing experiment container 20 is reduced：By pressure transmitter 13, the pressure of experiment container 20 is suppressed in monitoring.Beat
Perform fighting and press the blowoff valve 9 of the porch of experiment container 20, the water level that floods of experiment container 20 is suppressed in reduction, experiment container is suppressed in reduction
20 pressure.Case 7 is maintained due to there is the larger water level of cross-sectional area in loop, therefore suppresses the pressure change of experiment container 20
Speed is relatively low.When suppressing the pressure of experiment container 20 and being reduced to required pressure value, blowoff valve 9 is closed, experiment container is suppressed in completion
20 pressure reduction.
After completing the lifting of pressure or reducing, regulating valve 4 is closed, the pressure of experiment container is suppressed in monitoring, when suppressing reality
The pressure value that container pressure is reduced within half an hour is tested, during pressure value to be checked less than 5% highest, it is believed that equipment is without letting out
Leakage, it is leakage otherwise to suppress experiment container.
Equipment leakage detection is generally carried out using pressuring pump, but the pressure environment that pressuring pump is formed is unstable, and nothing
Method carries out the precise control of low pressure force environment for relatively low design pressure condition.It is an object of the invention to provide in pressure environment
Equipment leakage checking test under maintenance condition, can accurately maintain pressure environment under the conditions of lower pressure, meet compared with
The leak detection demand of the equipment of low design pressure.
It is normal pressure~10MPa that the method can be applied in operating pressure, and operating temperature is the aqueous medium work of normal temperature~300 DEG C
Under the conditions of work.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (9)
1. a kind of equipment leakage checking test under pressure environment maintenance condition, including water charging system, water storage system, water
Position maintains system and heating experimental provision, it is characterised in that：The water charging system is connected by moisturizing pipeline (19) with water storage system
It is connected in its moisturizing；The water storage system maintains system to be connected to maintain its water level constant by water pipeline (6) and water level, and
Regulating valve (4) and flowmeter (5) are set on water pipeline (6), and the water level maintains system by connecting pipe (12) and heating
Experimental provision stable connection is supplied water, and connection stop valve (11) is set on the connecting pipe (12)；The heating experiment dress
Put including suppressing experiment container (20), described suppressing in experiment container (20) is provided with heat generating components (14), suppresses experiment container
(20) entry position sets pressure transmitter (13), with the pressure value residing for real-time monitoring heat generating components (14), is suppressing reality
Discharge line (15) is installed in the outlet port for testing container (20), and discharge line (15) end is provided with delivery stop valve
(16)；
The tail end of described discharge line (15) is placed up inclined pipeline, the angle model with vertical direction slanted angle
Enclose：20~60 °, the length of the pipeline that is inclined upwardly is less than or equal to 5m.
2. a kind of equipment leakage checking test under pressure environment maintenance condition according to claim 1, it is special
Levy and be：The water charging system is logical to include moisturizing stop valve (17), small pump (18) and moisturizing pipeline (19), the storage tank
(2) top is connected by moisturizing pipeline (19), and small pump (18) and moisturizing stop valve (17) are set on moisturizing pipeline (19).
3. a kind of equipment leakage checking test under pressure environment maintenance condition according to claim 2, it is special
Levy and be：Described water storage system includes storage tank (2), and described storage tank (2) side is provided with storage tank liquid level gauge
(3) storage tank overflow valve (1), is installed near the position at top in storage tank (2).
4. a kind of equipment leakage checking test under pressure environment maintenance condition according to claim 3, it is special
Levy and be：The water level maintains system to include water level and maintains case (7), and water level dimension is installed in described water level maintenance case (7) side
Case liquid level gauge (8) is held, is maintained case (7) that water level is installed near the position at top in water level and is maintained case overflow valve (10).
5. a kind of equipment leakage checking test under pressure environment maintenance condition according to claim 4, it is special
Levy and be：Described storage tank (2), water level maintain case (7) and connecting pipe (12) bottom to be provided with blowoff valve (9), described
Blowoff valve (9) for cleaning when blowdown；Described connecting pipe (12) sets near the position for suppressing experiment container (20) entrance
The blowoff valve (9) put, the blowoff valve (9) set at this is for draining.
6. a kind of equipment leakage test experience method under pressure environment maintenance condition, it is characterised in that including step：
Step 1：The diameter D of the discharge line (15)Discharge, according to the equivalent diameter De for suppressing experiment container (20) outletSuppress experimental piece
It is determined that, DDischarge=DeSuppress experimental piece；
If the absolute altitude of experiment container (20) entrance is suppressed for 0m, if the absolute pressure needed for suppressing experiment container (20) leak detection
Scope is P1~P2Pa, if P1<P2, if local atmospheric pressure is P0Pa, inquiring about physical property table according to pressure P1 can obtain single-phase
Water density is ρ l, then water level maintains the absolute altitude LMB in bottom faceWater level maintains caseCan be calculated by following formula：
The elevation of top LMT of discharge line (15) vertical sectionDischarge, can be determined by following formula：
The diameter D of connecting pipe (12)ConnectionAccording to the equivalent diameter De for suppressing experiment container (20) outletSuppress experimental pieceIt is determined that, DConnection=
DeSuppress experimental piece；
Holding storage tank (2) bottom surface absolute altitude is LMBStorage tankCan be calculated by following formula：
The diameter D of water pipeline (6)Send water=DConnection；
The diameter D of moisturizing pipeline (19)MoisturizingDetermined according to connecting pipe (12) diameter, DMoisturizing=DConnection；And work as DConnectionDuring less than 50mm,
To ensure moisturizing efficiency, moisturizing pipeline (19) diameter DMoisturizing=50mm；
Step 2：It is h that water level maintains the height of case (7)Water level maintains case, calculated by following formula：
To ensure the precise control of pressure, the cross section of water level maintenance case (7) need to keep constant, its cross-sectional area SWater level maintains caseSet
Experiment container (20) cross-sectional area S is suppressed for 5~15 timesSuppress experimental piece, i.e. SWater level maintains case=(5~15) × SSuppress experimental piece；
Step 3：Delivery stop valve (16) is opened, connection stop valve (11) and regulating valve (4) is closed, water level is opened and is maintained case overflow
Valve (10), storage tank overflow valve (1) and moisturizing stop valve (17), start small pump (18), by moisturizing pipeline (19) to water storage
Case (2) moisturizing；By storage tank liquid level gauge (3), storage tank (2) water level is monitored, water level reaches storage tank (2) when storage tank (2)
When highly 85%, small pump (18) is closed, close moisturizing stop valve (17), stop moisturizing；
Connection stop valve (11) is opened, regulating valve (4) is opened, by pressure transmitter (13), experiment container (20) is suppressed in monitoring
Pressure, regulation regulation (4) aperture water filling, the pressure that experiment container (20) is suppressed in holding rises, and climbing speed is less than for 5%/minute,
When suppressing experiment container (20) pressure and reaching P1, regulating valve (4), finishing device connection, water filling are closed；
Step 4：Experiment container (20) pressure is suppressed in change under the conditions of lower pressure carries out equipment leakage test experience.
7. under a kind of delicate pressure environment maintenance condition according to claim 6 lower pressure equipment leakage test experience
Method, it is characterised in that before described step 3 carries out water filling to experimental system, case is maintained to the storage tank (2) and water level
(7) cleaned, by corresponding blowoff valve (9) blowdown, corresponding blowoff valve (9) is closed after the completion of cleaning.
8. under a kind of delicate pressure environment maintenance condition according to claim 6 lower pressure equipment leakage test experience
Method, it is characterised in that described step 4 changes to suppress experiment container (20) pressure and carry out equipment under the conditions of lower pressure lets out
Leak detection is tested；The pressure of experiment container (20) is suppressed in lifting：By pressure transmitter (13), experiment container (20) is suppressed in monitoring
Pressure, adjusts regulating valve (4) aperture water filling, and the pressure that experiment container (20) is suppressed in holding rises, climbing speed less than 1%/point
Clock, when suppressing experiment container (20) pressure and reaching required pressure value, closes regulating valve (4), and experiment container (20) is suppressed in completion
Boost in pressure.
9. under a kind of delicate pressure environment maintenance condition according to claim 8 lower pressure equipment leakage test experience
Method, it is characterised in that described step 4 changes to suppress experiment container (20) pressure and carry out equipment under the conditions of lower pressure lets out
Leak detection is tested；The pressure of experiment container (20) is suppressed in reduction：By pressure transmitter (13), experiment container (20) is suppressed in monitoring
Pressure；Opening suppresses the blowoff valve (9) of experiment container (20) porch, and the water level that floods of experiment container (20), drop are suppressed in reduction
The low pressure for suppressing experiment container (20)；Case (7) is maintained due to there is the larger water level of cross-sectional area in loop, therefore suppresses reality
The rate of pressure change for testing container (20) is relatively low；When suppressing experiment container (20) pressure and being reduced to required pressure value, the row of closing
The pressure reduction of experimental piece is suppressed in dirty valve (9), completion.
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| CN108151966A (en) * | 2017-11-13 | 2018-06-12 | 吉林化工学院 | A kind of water inspection tooling of quick detection pipelines of automobile air conditioner sealing performance |
| CN108980632A (en) * | 2018-07-04 | 2018-12-11 | 安徽原上草节能环保科技有限公司 | A kind of detection device for pipe leakage |
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| CN110133037A (en) * | 2019-06-12 | 2019-08-16 | 中国核动力研究设计院 | A kind of experimental provision to conduct heat for studying pool boiling under the structure of different heating face |
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