CN117491262A - Nuclear vacuum valve gas dynamic corrosion test system and test method thereof - Google Patents
Nuclear vacuum valve gas dynamic corrosion test system and test method thereof Download PDFInfo
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- CN117491262A CN117491262A CN202210887417.9A CN202210887417A CN117491262A CN 117491262 A CN117491262 A CN 117491262A CN 202210887417 A CN202210887417 A CN 202210887417A CN 117491262 A CN117491262 A CN 117491262A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 69
- 238000005260 corrosion Methods 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000012806 monitoring device Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 122
- 230000007246 mechanism Effects 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000001307 helium Substances 0.000 claims description 17
- 229910052734 helium Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 7
- 239000012670 alkaline solution Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 5
- 230000035882 stress Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000003679 aging effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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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
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/224—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a dynamic corrosion test system and a test method for a nuclear vacuum valve gas. The dynamic corrosion test system for the nuclear vacuum valve gas comprises an automatic monitoring device for controlling and monitoring the state of the vacuum valve for the nuclear to be tested, a dynamic corrosion medium control device for providing a corrosion medium for the dynamic corrosion process of the vacuum valve for the nuclear to be tested, and an atmosphere protection device for providing a negative pressure safety guarantee for the dynamic corrosion process of the vacuum valve for the nuclear to be tested. The gas dynamic corrosion test system for the nuclear vacuum valve solves the problem that the existing nuclear vacuum valve cannot perform dynamic corrosion by superposition of corrosion aging and stress aging, and the test result has a higher reference value.
Description
Technical Field
The invention relates to the technical field of performance detection of a vacuum valve for a core, in particular to a dynamic gas corrosion test system and a test method of the vacuum valve for the core.
Background
The development process of the vacuum valve for the nuclear use generally needs to conduct corrosion resistance research and reliability life time test on the vacuum valve for the nuclear use so as to verify whether a test piece meets design requirements. However, the corrosion aging test is carried out on the vacuum valve for the nuclear by using the working medium with strong corrosiveness, so that the damage of a test piece or the failure of a vacuum system is most likely to be caused, the leakage of the working medium with strong corrosiveness endangers the personal safety of operators, and great potential safety hazards exist, so that the corrosion method widely used at present is still a static corrosion scheme.
However, the currently widely used test methods, i.e. the reliability life time test under the conventional environment and the static corrosion test under the strong corrosive gas environment, cannot effectively superimpose the stress aging effect and the corrosion aging effect, give more severe test conditions and test conditions close to the actual use environment, and cannot achieve effective test effects, so that the design work of a safe, efficient and convenient dynamic corrosion test system is very necessary to develop.
Disclosure of Invention
The invention aims to provide a dynamic corrosion test system for a vacuum valve gas for a nuclear, aiming at the technical defect that a simple fatigue test or a static corrosion test in the prior art cannot meet the performance detection requirement of the vacuum valve for the nuclear.
Another object of the present invention is to provide a dynamic corrosion test method of the above-mentioned vacuum valve gas dynamic corrosion test system for a nuclear.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the dynamic corrosion test system for the nuclear vacuum valve gas comprises an automatic monitoring device for controlling and monitoring the state of the vacuum valve for the nuclear to be tested, a corrosion medium dynamic control device for providing a corrosion medium for the dynamic corrosion process of the vacuum valve for the nuclear to be tested, and an atmosphere protection device for providing negative pressure safety guarantee for the dynamic corrosion process of the vacuum valve for the nuclear to be tested;
the vacuum valve for the nuclear to be tested comprises a vacuum valve control mechanism for the nuclear and a vacuum valve control mechanism for the nuclear;
the automatic monitoring device comprises an operation controller for remotely controlling the vacuum valve control mechanism for the core and a data collector for collecting process data in the vacuum valve control mechanism for the core in the test process; the operation controller and the data acquisition device are respectively in communication connection with the vacuum valve control mechanism for the core;
the corrosion medium dynamic control device comprises a gas supply steel bottle for providing a corrosion gas atmosphere for the vacuum valve executing mechanism for the core, a gas receiving material bottle for collecting the corrosion gas, a vacuum pump for providing vacuum degree for the corrosion medium dynamic control device and a pipeline therebetween; the gas receiving bottle is arranged in the cryostat to condense and collect the corrosive gas;
the atmosphere protection device comprises a negative pressure glove box and a negative pressure fan for providing a negative pressure environment for the negative pressure glove box; the nuclear vacuum valve actuating mechanism and the gas supply steel cylinder are arranged in the negative pressure glove box.
In the above technical solution, the vacuum valve for the core to be tested may be one or a plurality of vacuum valves arranged in parallel.
In the technical scheme, a plurality of gas outlet branch pipelines are connected to a gas outlet main pipeline of the gas supply steel cylinder; each air outlet pipeline is provided with a vacuum valve executing mechanism for the nuclear; the multiple gas outlet branch pipelines are converged and then enter a vacuum main pipeline;
the inlet and the outlet of the gas receiving bottle are respectively provided with a valve and are communicated with the vacuum main pipeline;
and a gas inlet of the vacuum pump is communicated with the vacuum main pipeline.
In the above technical scheme, a second manual vacuum stop valve is arranged on the main air outlet pipe;
two first manual vacuum stop valves are arranged on the vacuum main pipeline; one of the two is positioned between the inlet and the outlet of the gas receiving material bottle, and the other is positioned at the front end of the inlet of the gas receiving material bottle;
and a first electric vacuum stop valve is further arranged at the front end of the gas inlet of the vacuum pump on the vacuum main pipeline and used for stopping the evacuation effect of the vacuum pump on the system.
In the above technical scheme, the two ends of the gas outlet branch pipeline are respectively provided with a first pressure gauge for judging whether the rated experimental pressure is reached.
In the technical proposal, the corrosive gas in the gas feeding steel cylinder is MoF with the purity not lower than 99.9 percent 6 And (3) gas.
In the above technical scheme, a vacuum pressure stabilizing tank is arranged between the gas feeding steel bottle and the gas receiving material bottle.
In the technical scheme, the vacuum surge tank is connected with the vacuum main pipeline; the vacuum pressure stabilizing tank is communicated with the gas receiving bottle through a communicating pipeline; the middle part of the communication pipeline is communicated with the vacuum main pipeline;
a third manual vacuum stop valve is arranged between the vacuum surge tank and the vacuum main pipeline;
the connecting pipeline is provided with a sixth manual vacuum stop valve and two seventh manual vacuum stop valves, wherein the sixth manual vacuum stop valve is close to one end of the vacuum pressure stabilizing tank, and the two seventh manual vacuum stop valves are close to one end of the gas receiving material bottle.
In the technical scheme, the corrosion medium dynamic control device further comprises a helium mass spectrometer leak detector.
In the technical scheme, the helium mass spectrometer leak detector is connected with the vacuum main pipeline; a fifth manual vacuum stop valve and a second electric vacuum stop valve are arranged between the helium mass spectrometer leak detector and the vacuum main pipeline;
a fourth pressure gauge is arranged between the fifth manual vacuum stop valve and the second electric vacuum stop valve; and when the fourth pressure gauge exceeds the limiting pressure, the second electric vacuum stop valve opening function is used for strengthening locking.
In the technical scheme, the gas outlet of the vacuum pump is also provided with a first alkali liquor absorption tank.
In the above technical solution, the atmosphere protection device further includes a second alkaline solution absorption tank; the second alkaline solution absorption groove is arranged at an air outlet of the negative pressure fan.
In another aspect of the present invention, the test method of the vacuum valve gas dynamic corrosion test system for a nuclear, comprises the steps of:
step 1: the working temperature of the low-temperature thermostat is reduced to a rated working condition; when the temperature reaches the rated temperature and is stable, the corrosive medium dynamic control device is evacuated by using a vacuum pump;
step 2: when the vacuum degree of the corrosive medium dynamic control device reaches the test condition, the vacuum pump is closed, the gas supply steel cylinder is opened, and corrosive gas atmosphere is provided for the nuclear vacuum valve executing mechanism; stopping the charging operation when the pressure reaches the rated experimental pressure;
step 3: the operation controller is used for controlling the vacuum valve control mechanism for the core, so that the vacuum valve actuating mechanism for the core is controlled, and the vacuum valve actuating mechanism for the core is kept in a reciprocating opening and closing motion state;
step 4: after the test is finished, opening valves at the outlet and the inlet of the vacuum pump and the material receiving bottle, and collecting all corrosive gas into the gas material receiving bottle; the cryostat and vacuum pump were turned off and the test ended.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention effectively solves the problem that the existing vacuum valve for the nuclear cannot perform dynamic corrosion by superposition of corrosion aging and stress aging, and the test result has more reference value.
2. The system combination mode used by the invention is convenient for construction and operation, and does not cause harm to personnel safety of operators due to product failure or damage of a vacuum system.
3. The technical scheme provided by the invention has the advantages of low initial investment, reusability, capability of simultaneously testing a plurality of test pieces and the like.
Drawings
FIG. 1 is a schematic diagram of a gas dynamic corrosion test system of a vacuum valve for nuclear use;
FIG. 2 is a schematic diagram of the piping connection of the corrosive medium dynamic control apparatus.
In the figure: the device comprises a 1-operation controller, a 2-data collector, a 3-nuclear vacuum valve control mechanism, a 4-data cable, a 5-nuclear vacuum valve actuating mechanism, a 6-gas supply steel cylinder, a 7-vacuum surge tank, an 8-gas receiving material cylinder, a 9-vacuum pump, a 10-vacuum main pipe, a 11-cryostat, a 12-first alkali liquor absorption tank, a 13-negative pressure glove box, a 14-negative pressure fan, a 15-second alkali liquor absorption tank, a 16-negative pressure pipeline, a 17-first manual vacuum stop valve, a 18-first electric vacuum stop valve, a 19-helium mass spectrometer, a 20-first pressure gauge, a 21-valve control special cable, a 22-gas outlet main pipe, a 23-gas outlet branch pipeline, a 24-vacuum branch pipeline, a 25-communication pipeline, a 26-second manual vacuum stop valve, a 27-third manual vacuum stop valve, a 28-fourth manual vacuum stop valve, a 29-fifth manual vacuum stop valve, a 30-third electric vacuum stop valve, a 31-sixth manual vacuum stop valve, a 33-fourth vacuum stop valve, a 33-fifth pressure gauge, a 37-fifth pressure gauge and a third pressure gauge.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A dynamic corrosion test system for nuclear vacuum valve gas comprises an automatic monitoring device, a dynamic corrosion medium control device and an atmosphere protection device;
the automatic monitoring device is used for controlling and monitoring the state of the vacuum valve for the nuclear to be tested;
the corrosion medium dynamic control device is used for providing a corrosion medium for the dynamic corrosion process of the vacuum valve for the nuclear to be tested;
the atmosphere protection device is used for providing negative pressure safety guarantee for the dynamic corrosion process of the vacuum valve for the nuclear to be tested and preventing the leakage of corrosive gas.
The vacuum valve for the core to be tested comprises a vacuum valve control mechanism 3 for the core and a vacuum valve actuating mechanism 5 for the core controlled by the vacuum valve control mechanism 3 for the core and a valve control special cable 21 between the vacuum valve actuating mechanism for the core as shown in figure 1; the test system can measure a plurality of nuclear vacuum valves simultaneously, and 5 nuclear vacuum valves are measured simultaneously as shown in fig. 1.
The automatic monitoring device comprises an operation controller 1 and a data collector 2; the operation controller 1 is in communication connection with the nuclear vacuum valve control mechanism 3, and the data collector 2 is in communication connection with the nuclear vacuum valve control mechanism 3 through a data cable 4; the operation controller 1 is used for remotely controlling the vacuum valve control mechanism 3 for the nuclear so as to enable the vacuum valve actuating mechanism 5 for the nuclear to realize reciprocating automatic opening and closing actions; the data acquisition device 2 is used for acquiring voltage and current signals in the nuclear vacuum valve control mechanism 3 in the test process and recording the on-off process data of the nuclear vacuum valve in the whole test process;
the dynamic control device for corrosive medium comprises a step of providing a corrosive gas atmosphere (MoF with purity not less than 99.9%) for a vacuum valve actuator 5 for nuclear use 6 Gas), a gas supply steel cylinder 6, a vacuum pressure stabilizing tank 7 for stabilizing and adjusting the gas pressure of the vacuum valve actuator 5 for nuclear in the dynamic corrosion process, a gas receiving material cylinder 8 for collecting the corrosion gas and a vacuum pump 9 for providing vacuum degree for the corrosion medium dynamic control device; the gas receiving material bottle 8 is arranged in the cryostat 11, and the temperature of the gas receiving material bottle 8 is continuously and constantly kept at the temperature of-190 ℃ so as to condense and collect corrosive gas; the gas outlet of the vacuum pump 9 is also provided with a first alkali liquor absorption tank 12 for further collecting corrosive gas which is not completely condensed in the gas receiving material bottle 8.
The dynamic control device for corrosive medium also comprises a helium mass spectrometer leak detector 19. When vacuum leaks occur in the actuator 5, the first gauge 20 gauge will rise rapidly, and further detection confirmation using the helium mass spectrometer leak detector 19 will be required.
The atmosphere protection device comprises a negative pressure glove box 13, a negative pressure fan 14 and a second alkali liquid absorption groove 15; the nuclear vacuum valve actuator 5 and the gas supply steel cylinder 6 are arranged in the negative pressure glove box 13; the negative pressure glove box 13 is communicated with the negative pressure fan 14 through a negative pressure pipeline 16; the second alkaline solution absorption groove 15 is arranged at the air outlet of the negative pressure fan 14; the negative pressure blower 14 provides negative pressure for the negative pressure glove box 13, and promptly evacuates and collects the corrosive gas in the negative pressure glove box 13 into the second alkaline solution absorption tank 15 for absorption after the corrosive gas leaks. The tightness of the negative pressure glove box 13 reaches the second level described in EJ/T1096-1999 sealing chamber tightness grading and inspection method. The negative pressure glove box 13 always keeps a negative pressure state in normal test; the negative pressure level can be further improved when leakage occurs, so that the working medium cannot enter the atmosphere, and the health of operators is affected.
Example 2
This example describes the installation of the piping and valves and pressure gauges of the corrosive medium dynamic control apparatus on the basis of example 1.
As shown in fig. 2, the main outlet pipe 22 of the gas feeding steel cylinder 6 is connected with a plurality of outlet branch pipes 23; each of the air outlet branch pipelines 23 is provided with a vacuum valve actuator 5 for nuclear use; the plurality of air outlet branch pipelines 23 are converged and then enter the vacuum main pipeline 10; two second manual vacuum stop valves 26 are arranged on the main air outlet pipeline 22; the two second manual vacuum stop valves 26 ensure that air does not permeate into the gas supply cylinder 6 when the gas supply cylinder 6 is replaced or that working gas in the gas supply cylinder 6 does not overflow by changing the opening state of the two second manual vacuum stop valves.
The inlet and outlet of the vacuum pressure stabilizing tank 7, the inlet and outlet of the gas receiving bottle 8, the helium mass spectrometer leak detector 19 and the vacuum pump 9 are respectively connected with the vacuum main pipeline 10 through a vacuum branch pipeline 24; the outlet of the vacuum pressure stabilizing tank 7 is communicated with the inlet of the gas receiving bottle 8 through a communication pipeline 25; the middle part of the communicating pipe 25 is connected with the vacuum main pipe 10;
a third manual vacuum stop valve 27 is arranged on the vacuum branch pipeline 24 corresponding to the inlet of the vacuum surge tank 7; the outlet of the vacuum surge tank 7 is provided with a sixth manual vacuum stop valve 31; the third manual vacuum stop valve 27 and the sixth manual vacuum stop valve 31 are used for cutting off the connection between the vacuum surge tank 7 and the vacuum main pipeline 10, so as to change the mass and the pressure of the working gas remained in the vacuum sub-pipeline 24.
Two seventh manual vacuum stop valves 32 are arranged at the inlet of the gas receiving bottle 8; two fourth manual vacuum stop valves 28 are arranged on the vacuum branch pipelines 24 corresponding to the outlets of the gas receiving material bottles 8; the two seventh manual vacuum cut-off valves 32 and the two fourth manual vacuum cut-off valves 28 are used for cutting off the connection between the receiving bottle 8 and the vacuum main pipe 10, for example, when the receiving container 8 is replaced, the two seventh manual vacuum cut-off valves 32 and the two fourth manual vacuum cut-off valves 28 can be closed at the same time, and the disassembly positions are respectively between the two seventh manual vacuum cut-off valves 32 and the two fourth manual vacuum cut-off valves 28.
A bypass manual vacuum shut-off valve 17-1 is installed on the main vacuum pipe 10 between the inlet and outlet of the vacuum surge tank 7, and functions to determine whether to bypass the vacuum surge tank 7 by changing the opening state thereof.
A manual vacuum stop valve 17-2 for receiving material is arranged on the vacuum main pipeline 10 between the inlet and the outlet of the gas receiving material bottle 8, and the function of the manual vacuum stop valve is to enable corrosive gas to enter the inlet of the gas receiving material bottle 8 for gas collection.
A fifth manual vacuum stop valve 29 and a second electric vacuum stop valve 33 are arranged on the vacuum branch pipeline 24 corresponding to the helium mass spectrometer leak detector 19; a third electric vacuum stop valve 30 is arranged on the vacuum sub-pipeline 24 corresponding to the vacuum pump 9; the fifth manual vacuum stop valve 29 is used for cutting off the connection between the helium mass spectrometer leak detector 19 and the vacuum main pipeline 10 and the vacuum branch pipeline 24, so as to ensure that working gas cannot enter the inside of the helium mass spectrometer leak detector 19 under the working state of the helium mass spectrometer leak detector 19. The second electric vacuum stop valve 33 is used for automatically stopping the connection between the helium mass spectrometer leak detector 19 and the vacuum main pipeline 10 and the vacuum branch pipeline 24, so as to ensure that working gas cannot enter the inside of the non-helium mass spectrometer leak detector 19 in the working state; the automatic cutoff principle is to lock the second electrically operated vacuum shut-off valve 33 open function when the fourth pressure gauge 36 indicates a value exceeding a prescribed value.
A first electrically powered vacuum shut-off valve 18 is mounted on the main vacuum line between the helium mass spectrometer leak detector 19 and the vacuum pump 9 (i.e. at the front end of the gas inlet of the vacuum pump 9); the first electric vacuum stop valve 18 is used for stopping the evacuation of the vacuum pump 9 to the system, and can also prevent air from penetrating into the vacuum main pipeline 10 after the vacuum pump 9 is stopped.
A third electric vacuum stop valve 30 is arranged on the vacuum sub-pipeline 24 corresponding to the vacuum pump 9; the third electric vacuum stop valve 30 is used for stopping the evacuation of the vacuum pump 9 to the system, and can also prevent air from penetrating into the vacuum sub-pipeline 24 after the vacuum pump 9 is stopped.
The two ends of the air outlet branch pipeline 23 are respectively provided with a first pressure gauge 20; a second pressure gauge 34 is arranged between the two second manual vacuum cut-off valves 26; a third pressure gauge 35 is arranged between the two fourth manual vacuum cut-off valves 28; a fourth pressure gauge 36 is arranged between the fifth manual vacuum cut-off valve 29 and the second electric vacuum cut-off valve 33; a fifth pressure gauge 37 is provided between the vacuum pump 9 and the third electric vacuum shut-off valve 30.
Example 3
This example describes the dynamic corrosion test method based on example 1.
A dynamic corrosion test method for a nuclear vacuum valve gas comprises the following steps:
step 1: reducing the temperature of the cryostat 11 to a rated operating mode; after the temperature is stable, when the two second manual vacuum stop valves 26 and the second electric vacuum stop valve 33 are ensured to be in a closed state, all vacuum valves in the system are opened, and the corrosive medium dynamic control device is evacuated by using the vacuum pump 9;
step 2: when the vacuum degree of the corrosive medium dynamic control device (namely, the reading of the fifth pressure gauge 37) reaches the test condition, for example, lower than 1Pa, two second manual vacuum stop valves 26 are opened, and corrosive gas in the gas supply steel cylinder 6 is filled into the vacuum pressure stabilizing tank 7 after passing through the main gas outlet pipe 22, the nuclear vacuum valve executing mechanism 5, the main vacuum pipe 10 and the vacuum branch pipe 24; when the indication of the first pressure gauge 20 reaches the rated test pressure, the two second manual vacuum stop valves 26 are closed to stop the charging operation;
step 3: when the two first manual vacuum stop valves 17, the two fourth manual vacuum stop valves 28 and the two seventh manual vacuum stop valves 32 are in the closed state, the operation controller 1 is used for controlling the vacuum valve control mechanism 3 for the core, and further the vacuum valve actuating mechanism 5 for the core is controlled, so that the vacuum valve actuating mechanism 5 for the core keeps a reciprocating opening and closing state;
step 4: after the test is finished, opening two fourth manual vacuum stop valves 28 and two seventh manual vacuum stop valves 32, and collecting all the residual corrosive gases in the vacuum pipeline 10, the main air outlet pipeline 22, the air branch pipeline 23, the vacuum branch pipeline 24 and the communicating pipeline 25 into the gas receiving material bottle 8; the cryostat 11 and vacuum pump 9 were turned off and the test ended.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (13)
1. A nuclear vacuum valve gas dynamic corrosion test system is characterized in that: the device comprises an automatic monitoring device for controlling and monitoring the state of a vacuum valve for a core to be tested, a corrosion medium dynamic control device for providing a corrosion medium for the dynamic corrosion process of the vacuum valve for the core to be tested, and an atmosphere protection device for providing negative pressure safety guarantee for the dynamic corrosion process of the vacuum valve for the core to be tested;
the vacuum valve for the nuclear to be tested comprises a vacuum valve control mechanism for the nuclear and a vacuum valve control mechanism for the nuclear;
the automatic monitoring device comprises an operation controller for remotely controlling the vacuum valve control mechanism for the core and a data collector for collecting process data in the vacuum valve control mechanism for the core in the test process; the operation controller and the data acquisition device are respectively in communication connection with the vacuum valve control mechanism for the core;
the corrosion medium dynamic control device comprises a gas supply steel bottle for providing a corrosion gas atmosphere for the vacuum valve executing mechanism for the core, a gas receiving material bottle for collecting the corrosion gas, a vacuum pump for providing vacuum degree for the corrosion medium dynamic control device and a pipeline therebetween; the gas receiving bottle is arranged in the cryostat to condense and collect the corrosive gas;
the atmosphere protection device comprises a negative pressure glove box and a negative pressure fan for providing a negative pressure environment for the negative pressure glove box; the nuclear vacuum valve actuating mechanism and the gas supply steel cylinder are arranged in the negative pressure glove box.
2. The nuclear vacuum valve gas dynamic corrosion test system of claim 1, wherein: the vacuum valve for the nuclear to be tested can be one or a plurality of vacuum valves arranged in parallel.
3. The nuclear vacuum valve gas dynamic corrosion test system of claim 2, wherein: a plurality of gas outlet branch pipelines are connected to the gas outlet main pipeline of the gas supply steel cylinder; each air outlet pipeline is provided with a vacuum valve executing mechanism for the nuclear; the multiple gas outlet branch pipelines are converged and then enter a vacuum main pipeline;
the inlet and the outlet of the gas receiving bottle are respectively provided with a valve and are communicated with the vacuum main pipeline;
and a gas inlet of the vacuum pump is communicated with the vacuum main pipeline.
4. A nuclear vacuum valve gas dynamic corrosion test system as claimed in claim 3, wherein: a second manual vacuum stop valve is arranged on the main air outlet pipeline;
two first manual vacuum stop valves are arranged on the vacuum main pipeline; one of the two is positioned between the inlet and the outlet of the gas receiving material bottle, and the other is positioned at the front end of the inlet of the gas receiving material bottle;
and a first electric vacuum stop valve is further arranged at the front end of the gas inlet of the vacuum pump on the vacuum main pipeline and used for stopping the evacuation effect of the vacuum pump on the system.
5. A nuclear vacuum valve gas dynamic corrosion test system as claimed in claim 3, wherein: and the two ends of the air outlet branch pipeline are respectively provided with a first pressure gauge for judging whether the rated experimental pressure is reached.
6. The nuclear vacuum valve gas dynamic corrosion test system of claim 1, wherein: the corrosive gas in the gas feeding steel cylinder is MoF with purity not less than 99.9 percent 6 And (3) gas.
7. A nuclear vacuum valve gas dynamic corrosion test system as claimed in claim 3, wherein: a vacuum pressure stabilizing tank is arranged between the gas feeding steel bottle and the gas receiving material bottle.
8. The nuclear vacuum valve gas dynamic corrosion test system of claim 7, wherein: the vacuum pressure stabilizing tank is connected with the vacuum main pipeline; the vacuum pressure stabilizing tank is communicated with the gas receiving bottle through a communicating pipeline; the middle part of the communication pipeline is communicated with the vacuum main pipeline;
a third manual vacuum stop valve is arranged between the vacuum surge tank and the vacuum main pipeline;
the connecting pipeline is provided with a sixth manual vacuum stop valve and two seventh manual vacuum stop valves, wherein the sixth manual vacuum stop valve is close to one end of the vacuum pressure stabilizing tank, and the two seventh manual vacuum stop valves are close to one end of the gas receiving material bottle.
9. A nuclear vacuum valve gas dynamic corrosion test system as claimed in claim 3, wherein: the dynamic control device for the corrosive medium also comprises a helium mass spectrometer leak detector.
10. The nuclear vacuum valve gas dynamic corrosion test system of claim 9, wherein: the helium mass spectrometer leak detector is connected with the vacuum main pipeline; a fifth manual vacuum stop valve and a second electric vacuum stop valve are arranged between the helium mass spectrometer leak detector and the vacuum main pipeline;
a fourth pressure gauge is arranged between the fifth manual vacuum stop valve and the second electric vacuum stop valve; and when the fourth pressure gauge exceeds the limiting pressure, the second electric vacuum stop valve opening function is used for strengthening locking.
11. The nuclear vacuum valve gas dynamic corrosion test system of claim 1, wherein: the gas outlet of the vacuum pump is also provided with a first alkali liquor absorption tank.
12. The nuclear vacuum valve gas dynamic corrosion test system of claim 1, wherein: the atmosphere protection device further comprises a second alkali solution absorption tank; the second alkaline solution absorption groove is arranged at an air outlet of the negative pressure fan.
13. A test method of a vacuum valve gas dynamic corrosion test system for nuclear use according to any one of claims 1 to 12, comprising the steps of:
step 1: the working temperature of the low-temperature thermostat is reduced to a rated working condition; when the temperature reaches the rated temperature and is stable, the corrosive medium dynamic control device is evacuated by using a vacuum pump;
step 2: when the vacuum degree of the corrosive medium dynamic control device reaches the test condition, the vacuum pump is closed, the gas supply steel cylinder is opened, and corrosive gas atmosphere is provided for the nuclear vacuum valve executing mechanism; stopping the charging operation when the pressure reaches the rated experimental pressure;
step 3: the operation controller is used for controlling the vacuum valve control mechanism for the core, so that the vacuum valve actuating mechanism for the core is controlled, and the vacuum valve actuating mechanism for the core is kept in a reciprocating opening and closing motion state;
step 4: after the test is finished, opening valves at the outlet and the inlet of the vacuum pump and the material receiving bottle, and collecting all corrosive gas into the gas material receiving bottle; the cryostat and vacuum pump were turned off and the test ended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210887417.9A CN117491262A (en) | 2022-07-26 | 2022-07-26 | Nuclear vacuum valve gas dynamic corrosion test system and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210887417.9A CN117491262A (en) | 2022-07-26 | 2022-07-26 | Nuclear vacuum valve gas dynamic corrosion test system and test method thereof |
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