CN108766603A - A kind of superhigh temperature helium-leakage detecting apparatus - Google Patents
A kind of superhigh temperature helium-leakage detecting apparatus Download PDFInfo
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- CN108766603A CN108766603A CN201810636359.6A CN201810636359A CN108766603A CN 108766603 A CN108766603 A CN 108766603A CN 201810636359 A CN201810636359 A CN 201810636359A CN 108766603 A CN108766603 A CN 108766603A
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- door
- plate
- vacuum tank
- babinet
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/002—Detection of leaks
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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
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of superhigh temperature helium-leakage detecting apparatus, including babinet, moving track and material trolley.Wherein the door-plate of material trolley and work supporting block are using flexible connection, it can be disengaged with door-plate after work supporting block enters babinet, so that door-plate floating is fixed at door frame of box, avoid the influence of end of door plate after work supporting block temperature distortion, ensures that door-plate can be 5 × 10 in final vacuum‑4Pa, temperature still reliably seal babinet under the ultra-high temperature condition higher than 500 DEG C, to realize normal leak detection.Simultaneously, babinet is arranged by incubator and vacuum tank, cooling body in the case communicated therewith is equipped at vacuum tank, the temperature control interlayer that can be connected to outside is additionally provided between two casees, it is heated up by partition heating accuracy controlling, by collective effect cooling in cooling and case outside case, accelerate cooling process, to match work piece production beat.
Description
Technical field
The present invention relates to a kind of superhigh temperature helium-leakage detecting apparatus, belong to helium leak test technical field.
Background technology
Existing PWR Fuel stick is by end plug, spring, heat insulation, UO above and below zirconium cladding pipe, zirconium2The compositions such as pellet, by bullet
Spring, heat insulation, UO2Pellet be packed into zirconium cladding pipe after, by upper and lower end plug and cladding tubes welding and fill helium sealing welding, make
At fuel rod product.Fuel assembly is core component important in nuclear reactor, and the fuel rod quality direct relation in component
To the safe operation of nuclear reactor, thus it is very high to weld seam quality requirement.Currently, can be used for fuel rod investigation leak hunting method compared with
It is more, including bubble method, method for analysis of water quality, carbon method of trapping, helium mass spectrum leak detection etc..Wherein, helium mass spectrum leak detection is most widely used at present
A kind of general, the highest leak hunting technology of sensitivity.Since helium concentration is smaller in air, helium mass spectrometer leak detector shows that leakage is situated between using helium work
Matter is conducive to make the background of leak detection system very low, to obtain higher leak detection sensitivities.Helium mass spectrometer leak detector can be in various inspections
It surveys under working condition and realizes the quantitative detection of slip, and its hunt leak high resolution, wide range of measurement, especially minute leakage rate
Accurate measurement, thus be widely used in the industries such as Aeronautics and Astronautics, electronics industry, semiconductor, auto industry, semiconductor.
In normal working conditions, central temperature is up to 2000 DEG C to fuel rod, and welds skin temperature and be also up to 500
DEG C or so.But the heat treatment condition of existing helium mass spectrum leak detection equipment can not match fuel rod normal running conditions, such as Chinese invention
A kind of high-temperature high pressure helium-leakage detecting method and its leakage detection apparatus, highest heat treatment temperature are disclosed in patent CN2007100499611
Degree is 380 DEG C, a kind of gas for hot helium leak test is disclosed in Chinese invention patent application CN2016105570960 heats and follow
Loop system and cooling means is quickly heated, maximum heat treatment temperature is 270 DEG C.Since fuel rod envelope operating temperature has been approached
Much the common vacuum chamber material tolerance limit easily causes when carrying out vacuum leak hunting operation under this hot conditions
Box deformation can not complete leak detection operation to destroy vacuum system.In addition to this, under hot conditions, how is vacuum chamber
Realize rapid temperature-regulating operation, it is also urgently to be resolved hurrily to match industrialization production requirements.
Invention content
The purpose of the present invention is to provide a kind of superhigh temperature helium-leakage detecting apparatus, can be 5 × 10 in final vacuum-4Pa、
Temperature realizes stabilized seal under the ultra-high temperature condition higher than 500 DEG C, is normally hunted leak；And it can realize fast under ultra-high temperature condition
Fast heating-cooling, to match work piece production beat.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of superhigh temperature helium-leakage detecting apparatus, which is characterized in that including babinet, moving track and material trolley, moving track setting
In the open front of babinet, material trolley is slided by the drive of driving mechanism along moving track；Babinet includes vacuum tank and is provide with
Incubator on the outside of vacuum tank, at vacuum tank connection be equipped with cooling body in case, temperature control is equipped between vacuum tank and incubator and is pressed from both sides
Layer is equipped with several heating tapes in temperature control interlayer, be equipped at the top of incubator the air inlet shut-off valve being connected respectively with temperature control interlayer and
It is vented shut-off valve；Material trolley includes the door-plate and working tray being movably connected, and door-plate is by hanging linkwork and driving machine
Structure connects, and the moving guide rail that working tray is arranged along vacuum tank moves.
Further, vacuum tank includes workspace and buffering area, and incubator covers on the outside of workspace.
Further, cycle is connected to inside cooling body and workspace in case.
Further, it is vented at shut-off valve and is provided with air exhauster.
Further, door-plate retaining mechanism is equipped at door-plate, door-plate retaining mechanism connects with driving mechanism activity.
Further, working tray bottom is equipped with idler wheel, and idler wheel is moved along moving guide rail.
Further, it is equipped with water-cooling structure at doorframe, door-plate and temperature control interlayer.
Following supplementary explanation is carried out to above-mentioned technical proposal：
Coordinated by low boy cabinet and material trolley to use drawer type to open and close pattern, and using the workpiece support with several conduits
Fuel rod is fixed in frame, to coordinate the shape of fuel rod and increase single applied sample amount as far as possible, facilitate loading and unloading.
Babinet is arranged by incubator and vacuum tank, and cooling body in the case communicated therewith, two casees are equipped at vacuum tank
Between be additionally provided with and can be enabled in case simultaneously with the temperature control interlayer that be connected to of outside when needing to vacuum tank progress cold-zone processing
Cooling body carries out cooling treatment to gas medium in vacuum tank, and enables the air inlet being connected to temperature control interlayer, exhaust shutdown
Valve and air exhauster outside vacuum chamber to exchanging heat.Case is interior, the combination of the outer two kinds of types of cooling of case, is conducive to improve cooling
Efficiency accelerates cooling process.
Vacuum tank length is more than incubator, is workspace with incubator intersection, and non-overlapping position is buffering area.Material
After trolley completes charging, fixed fuel rod is located at workspace at work supporting block.The heat that heating tape generates largely is limited
At workspace, to ensure that the efficiency of heating surface and heat-insulating property of workspace.
Vacuum tank uses stainless steel, inner wall polishing to avoid influencing background to reduce metal steam output under high temperature.
The door-plate and work supporting block of material trolley using flexible connection, when work supporting block completely into babinet and door-plate is in
When shutdown position, moving guide rail holds up work supporting block, and the movable connection structure of work supporting block and door-plate is made to unclamp, and door-plate is at this time not
It is influenced by work supporting block.Meanwhile door-plate is lifted by the suspension linkwork with certain vertical telescopic amount, holding processing
It is bonded always with vacuum flange at doorframe in the process, to ensure sealing performance of the door-plate to vacuum tank, realizes the pole in vacuum tank
It is 5 × 10 to limit vacuum degree-4Reliable sealing under the ultra-high temperature condition of Pa, temperature higher than 500 DEG C, to smoothly complete leak detection operation.
To ensure the even running of material trolley, during input and output material, the rear end idler wheel of work supporting block is restricted to always
In vacuum tank.
It is formed due to vacuum tank and using welding production, in the protection to vacuum tank, in vacuum box outer wall commissure
Water-cooling structure must be added to control the position into trip temperature.Meanwhile to prevent doorframe and door plate deformation excessive, also in doorframe vacuum
At flange gasket and door-plate both sides are provided with water-cooling structure.
Description of the drawings
Fig. 1 shows side structure schematic view of the present invention.
Fig. 2 shows positive structure diagrams of the present invention.
Fig. 3 shows cooling body schematic diagram in body structure and case of the present invention.
Fig. 4 shows babinet dimensional structure diagram of the present invention.
Fig. 5 shows material trolley dimensional structure diagram of the present invention.
Fig. 6 shows material trolley positive structure diagram of the present invention.
Fig. 7 shows the structural schematic diagram in temperature control interlayer in embodiment.
Reference sign：1. babinet, 2. moving tracks, 3. material trolleies, 4. suspension linkworks, 5. driving mechanisms,
6. door-plate hold-down mechanism, 7. door-plate retaining mechanisms, cooling body in 8. casees；11. vacuum tank, 12. incubators, 13. temperature control interlayers,
14. doorframe, 15. air exhausters, 31. door-plates, 32. work supporting blocks, 71. frames, 72. driving devices, 81. plate heat exchangers, 82.
Recovery pump, 83. first argon tanks, 84. compressors, 85. argon purification devices, 86. second argon tanks；111. workspace, 112 is slow
Rush area, 121. air inlet shut-off valves, 122. exhaust shut-off valves, 131. heating tapes.
Specific implementation mode
Embodiment
Using mass spectrometry to the being sealed property inspection of nuclear fuel rod weld seam.
1, the operating procedure of device local specification and key operation：
1. bin enclosure：
As shown in Figure 1, work supporting block 32 requires to design according to nuclear fuel rod to be checked, rear and front end bottom is equipped with idler wheel
321, it is slided along the moving guide rail 110 for being set to 11 bottom of vacuum tank.Material trolley 2 is driven by driving mechanism 5 and is moved along moving track 2
It is dynamic.As shown in Figure 5 and Figure 6, when mobile, the door-plate retaining mechanism 7 for being movably set in 31 both ends of door-plate is driven by it 72 band of device
It is dynamic to slide into top and the holding of driving mechanism 5 towards inside along frame 71, to ensure that material trolley 2 is steadily mobile.Work as workpiece
Bracket 32 is completely into vacuum tank 11, and when door-plate 31 reaches shutdown designated position, moving guide rail 110 carries out work supporting block 32
It is oriented to, so that door-plate 31 is detached with the hung and buckled movable connection structure in 32 front end of work supporting block, door-plate 31 and 32 phase of work supporting block
To disengaging, to avoid the influence for deforming end of door plate 31 of work supporting block 32.Meanwhile driving device 72 drives door-plate retaining mechanism
7 slide into initial position along frame 71, release the holding connection relation of door-plate 31 and driving mechanism 5, and door-plate 31 is only cut with scissors with suspension
Connection mechanism 4 connects.As shown in fig. 6, suspension 4 upper and lower ends of linkwork have stretching structure, 31 both ends of door-plate are individually fixed in,
Make door-plate 31 that there is definitely floatability.Then, it is set to the door-plate hold-down mechanism 6 at doorframe 14 to start, by door-plate 31 and door
Vacuum flange at frame 14 compresses, and ensures reliable sealing of the door-plate 31 to vacuum tank 11.
Preferably, the self-closed using existing automation control software realization babinet and unlatching, and match and close
Cutting agency realizes the Automatic Control from feeding to blanking.
2. being vacuum-treated：
Workspace 111 is provided with leak detector, Roots's pump assembly, molecular pump, maintains pump, oilless vacuum pump, controller, power vacuum
The vacuum components such as meter, skin pulling force vacuum meter, high vacuum valve, pneumatic element, referance leak, wherein power vacuum meter, skin pulling force are true
Sky meter and referance leak interface are set to the pumping that connection is made of Roots's pump assembly, molecular pump, maintenance pump and oilless vacuum pump etc.
The distal end of the interface of gas system, and the interface of leak detector is set at the interface end of extract system.According to working specification, open successively
Dynamic vacuum component, is vacuum-treated vacuum tank 11, and demarcated to system in vacuum tank 11 by leak detector etc..
Leak detector uses INFICON LDS-3000, minimum leak detection rate≤1.33 × 10 in the present embodiment-11Pa•m3/s.Point
Son pump uses Lay treasured W2200iP（L）, vacuum degree reaches 9 × 10 in 25min after normal operation-3It is after Pa, normal operation 30min
Unite background < 2.0 × 10-10Pa•m3/ s, controls Pressure Rise Rate≤0.1Pa/h in vacuum tank 11, and final vacuum is up to 5 × 10-4Pa。
Two class standard leakage holes are installed, leak rate is respectively in the present embodiment at workspace 111（1.5±0.3）×10-9Pa•
m3/ s and（2.7±0.3）×10-9Pa•m3/s。
3. heating treatment：
As shown in fig. 7, incubator 12 uses a variety of thermal insulation materials such as silicic acid aluminum modules heat-preservation cotton into composite thermal insulation.Temperature control interlayer 13
In be equipped with the adjustable heating tape 131 of multigroup thermal power, to workspace 111 carry out partition heating.It is arranged inside and outside according to workspace 111
Monitoring of several thermocouples to temperature, each heating tape power is regulated and controled by temperature control system, regulates and controls temperature rate.
The present embodiment uses 9 thermometrics, and 18 temperature-measuring heat couples are arranged altogether inside and outside workspace 111.Thermometric mode is pressed
AMS2750E pyrometries are measured, control workspace 111 in temperature it is very poor≤5 DEG C（200 DEG C ~ 600 DEG C zero loads）.
4. temperature regulates and controls：
Temperature control has manually and automatically two kinds of working methods, the operable temperature control system in heating or insulating process
Start and gone out air inlet shut-off valve 121, exhaust shut-off valve 122 and air exhauster 15 as shown in Figure 3 and Figure 4, to be directly entered drop
Warm process.
Preferably, whole regulation and control are carried out to temperature in babinet 1 using existing automation control software, forms PID
Closed-loop control system, in order to regulate and control warming and cooling rate.
It is ± 1 DEG C that temperature-controlled precision is required in the present embodiment, rises to 500 DEG C by heating curve in 30min, drop is pressed in 30min
Near 70 DEG C ~ 80 DEG C of warm curve.
Meanwhile 1 external temperature of babinet must also be detected in real time ,+15 DEG C of room temperature is not to be exceeded in external temperature.
5. cooling treatment in case：
As shown in figure 3,11 inside cooling of vacuum tank is realized that cold-zone gas uses high-purity argon gas by cooling body in case 8.Vacuum tank
High temperature argon inside 11, which exchanges heat under the action of recovery pump 82 into the plate heat exchanger 81 of cooling body in cartonning 8, to cool down, with
Enter the first argon tanks 83 afterwards, then by entering in the second argon tanks 86 under the action of compressor 84 and argon purification device 85,
The argon gas after cooling is set to return in vacuum tank 11 according to preset flow.Purified argon concentration is 99.999%, pressure recovery
1000Pa.It is recycled if result qualification of hunting leak, if leak detection result is unqualified, when fire grate sky.
6. babinet is opened：
After babinet 1 cools down, deflation processing is carried out to vacuum tank 11.After processing reaches setting value, material trolley 2 is with driving mechanism
5 drive is driven out to from vacuum tank 11.
2, technological process is checked：
S1. above-mentioned bin enclosure operation and vacuum processing are carried out, room temperature calibration is carried out to vacuum tank 11.
S2. heating treatment is carried out, workspace 111 is made to be warming up to（500±5）DEG C, vacuum tank is demarcated under the condition of high temperature herein
11。
S3. it synchronizes and cools down into cooling treatment in trip temperature regulation and control and case, until after preset temperature value, to vacuum tank 11
It deflates, and carries out babinet opening operation.
S4. by nuclear fuel rod feeding to work supporting block 32 to be checked, bin enclosure operation is carried out again.For ease of to be checked
The loading and unloading of nuclear fuel rod should be by whole logistics transmission center in 11 center of vacuum tank and workshop when the present apparatus is installed and positioned
Height is consistent, and can carry out good cooperation, makes feeding device from upper process automatic material taking, after high temperature is hunted leak,
It can be transmitted to discharging area automatically.
S5. it is vacuum-treated again, under room temperature, one is hunted leak respectively when vacuum degree is 1000Pa, 100Pa and 10Pa
It is secondary, to judge fuel rod to be checked with the presence or absence of big leakage.
If S6. there is big leakage, manual dichotomy finds out the fuel rod in the presence of leakage；If there is no big leakage, carry out at vacuum
Reason and heating treatment make suction be better than 1 × 10-2Pa, workspace 111 are heated up and are maintained within the scope of 300 DEG C ~ 550 DEG C, protect
Temperature is no less than 1h.
S7. workspace 111 is further vacuum-treated and heating treatment, suction is made to be better than 1.33 × 10- 3Pa, workspace 111 are warming up to（500±5）After DEG C, hunt leak.
Room temperature and high temperature leak detection leak rate≤1.33 × 10-9Pa•m3/ s, hunt leak time > 5s.
S8. after completing leak detection, the valve of connection vacuum tank 11 and leak detector mass spectrum chamber is closed, it is synchronous to regulate and control into trip temperature
Cool down to babinet 1 with cooling treatment in case.
S9. when argon gas is cooled to 70 DEG C ~ 80 DEG C in vacuum tank 11, using nitrogen release.
S10. babinet opening operation is carried out, by fuel rod blanking to be checked to storing area.It fills in, draw temperature control diagram
And pressure control diagram, provide examining report.
Claims (7)
1. a kind of superhigh temperature helium-leakage detecting apparatus, which is characterized in that including babinet（1）, moving track（2）With material trolley（3）, move
Dynamic rail road（2）It is set to babinet（1）Open front, material trolley（3）Pass through driving mechanism（5）Drive along moving track（2）
Sliding；Babinet（1）Including vacuum tank（11）With cover at vacuum tank（11）The incubator in outside（12）, vacuum tank（11）Place's connection
Equipped with cooling body in case（8）, vacuum tank（11）And incubator（12）Between be equipped with temperature control interlayer（13）, temperature control interlayer（13）Inside set
There are several heating tapes（131）, incubator（12）Top be equipped with respectively with temperature control interlayer（13）The air inlet shut-off valve being connected（121）
With exhaust shut-off valve（122）；Material trolley（3）Including the door-plate being movably connected（31）And working tray（32）, door-plate（31）It is logical
Cross suspension linkwork（4）With driving mechanism（5）Connection, working tray（32）Along vacuum tank（11）The moving guide rail of interior setting
（110）It is mobile.
2. the apparatus according to claim 1, which is characterized in that vacuum tank（11）Including workspace（111）And buffering area
（112）, incubator（12）Cover at workspace（111）Outside.
3. the apparatus of claim 2, which is characterized in that cooling body in case（8）With workspace（111）Inside cycle
Connection.
4. the apparatus according to claim 1, which is characterized in that exhaust shut-off valve（122）Place is provided with air exhauster（15）.
5. the apparatus according to claim 1, which is characterized in that door-plate（31）Place is equipped with door-plate retaining mechanism（7）, door-plate lock
Tight mechanism（7）With driving mechanism（5）Activity connects.
6. the apparatus according to claim 1, which is characterized in that working tray（32）Bottom is equipped with idler wheel（321）, idler wheel
（321）Along moving guide rail（110）It is mobile.
7. according to any device of claim 1 ~ 6, which is characterized in that doorframe（14）, door-plate（31）With temperature control interlayer
（13）Place is equipped with water-cooling structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810636359.6A CN108766603B (en) | 2018-06-20 | 2018-06-20 | Ultra-temperature helium leak detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810636359.6A CN108766603B (en) | 2018-06-20 | 2018-06-20 | Ultra-temperature helium leak detection device |
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| CN108766603A true CN108766603A (en) | 2018-11-06 |
| CN108766603B CN108766603B (en) | 2021-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470464A (en) * | 2023-11-20 | 2024-01-30 | 江苏东方瑞吉能源装备有限公司 | Pressure container hot helium leakage detection device and leakage detection method thereof |
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