CN204332390U - Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus - Google Patents

Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus Download PDF

Info

Publication number
CN204332390U
CN204332390U CN201520026696.5U CN201520026696U CN204332390U CN 204332390 U CN204332390 U CN 204332390U CN 201520026696 U CN201520026696 U CN 201520026696U CN 204332390 U CN204332390 U CN 204332390U
Authority
CN
China
Prior art keywords
envelope
plug
ring
seal assembly
electrical heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201520026696.5U
Other languages
Chinese (zh)
Inventor
侯晔
周永
余平
康志彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuclear Power Institute of China
Original Assignee
Nuclear Power Institute of China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nuclear Power Institute of China filed Critical Nuclear Power Institute of China
Priority to CN201520026696.5U priority Critical patent/CN204332390U/en
Application granted granted Critical
Publication of CN204332390U publication Critical patent/CN204332390U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Abstract

The utility model discloses pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus, comprise the seal assembly A being installed on outer envelope (9) openend and the seal assembly B being set in outer envelope (9) end plug installation end outside, seal assembly B, outer envelope (9) and end plug (21) form airtight chamber, the inside of seal assembly A is provided with one and is communicated with the extraneous air hole A(14 inner with outer envelope (9)), the inside of seal assembly B is provided with a connection vacuum that is extraneous and airtight chamber and connects mouth (20).The beneficial effects of the utility model are: design is unique, easy to operate, whole detection installation operation does not damage product, both the quality inspection having met product requires, in turn ensure that the integrality of product, each position of whole weld seam is made all to bear the probe gas of the same pressure, probe gas and bead contact are evenly, comprehensively, accelerate leak detection speed, saved probe gas.

Description

Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus
Technical field
The utility model relates to voltage stabilizer electrical heating elements package seal checker field, particularly, relates to a kind of pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus.
Background technology
Voltage stabilizer is the visual plant of PWR nuclear power plant primary Ioops pressure-bearing boundary, is mainly used in controlling reactor-loop coolant system pressure.When reactor-loop coolant system pressure is lower than normal value, more electrical heating elements will put into operation, make the water vapor of voltage stabilizer lower space and enter the voltage stabilizer vapor space, thus make system pressure go back up to required value.Therefore, electric heating function is the premiere feature of electrical heating elements.But as the important feature component of voltage stabilizer, electrical heating elements or important primary Ioops pressure-bearing boundary, therefore except electric heating function, the integrality of the structure of electrical heating elements itself, sealing, good insulating property are also important technology indexs.
Current electrical heating elements mature production technology, there is successful application experience in Foreign Pressurized Water nuclear power plant at home.But also there is the undesirable case of insulating property, by analysis, be judged to be that sealing imperfection caused.Electrical heating elements works in High Temperature High Pressure water environment, if sealing imperfection, serious leakage can cause primary Ioops refrigerant leaks; Microcosmic leakage can make electrical heating elements involucrum inside moist gradually, and the insulating property between resistance wire and involucrum are destroyed, and insulation safety is impaired, and then element is burnt in resistance wire short circuit.
Therefore, need to carry out scientific and effective Monitoring and Controlling to the sealing property of the structure of electrical heating elements, guarantee security that product uses, reliability, and then meet the nuclear reactor safety requirement improved constantly.
Chinese patent CN103471780A discloses a kind of airtight container end cap weld inspection system and detection method, propose the thinking adopting helium leak test to detect weld joint close sealing property, but because its product detected is airtight container end cap weld seam, differ larger with end plug-outer envelope welding line structure, simultaneously, because the helium flow of nozzle ejection scatters, and be mixed with the air of some, concentrations of helium is decreased, the direction of ejection air-flow can not aim at the direction of small opening completely, in addition, the air existed at notch place can make the concentrations of helium entering small opening reduce, therefore tradition spray helium method leak detection sensitivities is low, test result uncertainty is high.
The utility model is just for adapting to ensure the sealing of electrical heating elements and a kind of detection technique of designing, by this detection technique, can reflect that whether electrical heating elements housing seal is perfect in time in process of production, thus in time reject bad product, product of guaranteeing to dispatch from the factory meets the requirements.
Utility model content
Technical problem to be solved in the utility model be to provide a kind of design uniqueness, easy to operate, leak detection reliable results pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus.
The technical scheme in the invention for solving the above technical problem is:
Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus, comprise the seal assembly A being installed on outer envelope openend and the seal assembly B being set in outer envelope end plug installation end outside, seal assembly A is connected with the inner wall sealing of outer envelope, the outer wall of seal assembly B and outer envelope is tightly connected, seal assembly B, outer envelope and end plug form airtight chamber, the inside of seal assembly A is provided with the air hole A that is communicated with the external world and outer envelope inside, and the inside of seal assembly B is provided with a vacuum being communicated with the external world and airtight chamber and connects mouth.
By adopting this pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus, end plug-outer envelope assembly can keep existing structure just can carry out this end plug-outer envelope weld seam helium leak test.
Described seal assembly A comprises gas-charging connection, gland nut, hold-down ring A and O-ring seal A, gas-charging connection is made up of the path cylindrical portion connected successively and large footpath cylindrical portion, described air hole A is arranged at and runs through gas-charging connection inside and axially run through gas-charging connection, the large footpath cylindrical portion of gas-charging connection stretches into the openend of outer envelope, the outside surface of path cylindrical portion is provided with screw thread, path cylindrical portion is set with gland nut successively, hold-down ring A and O-ring seal A, gland nut is connected by screw thread and small column portion, O-ring seal A is pressed on the annular table terrace of large footpath cylindrical portion by hold-down ring A by gland nut, outer envelope inwall and gas-charging connection outer rim are formed be tightly connected.
Described seal assembly B comprises swivel nut, O-ring seal B, hold-down ring B and threaded cap, swivel nut is the tubular of both ends open, threaded cap is the tubular of one end open, the outside surface of threaded cap cylinder side wall is provided with external thread, the inside surface of swivel nut cylinder side wall is provided with internal thread, one end of swivel nut arranges one end of opening in threaded cap by thread set, the inwall of the other end of swivel nut is provided with ringwise fin, one end that outer envelope connects end plug is stretched in the cavity of threaded cap through after swivel nut, be disposed with between the fin of swivel nut and the end face of threaded cap and be set in O-ring seal B on outer envelope and hold-down ring B, O-ring seal B is pressed on the fin of swivel nut by hold-down ring B by threaded cap, make threaded cap, O-ring seal B, outer envelope and end plug form airtight chamber, described vacuum connects mouth and arranges with on threaded cap, and this vacuum connects the inner space that mouth is communicated with the external world and threaded cap.
This pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-seal assembly A of outer envelope weld seam helium-leakage detecting apparatus and the structure of seal assembly B are that the structure being combined with end plug-outer envelope assembly carries out designing, the structure of seal assembly A and seal assembly B ensure that seal chamber favorable sealing property in testing process, thus ensure that the reliability of testing result.Meanwhile, easy disassembly, sealing, be easy to operation, improve work efficiency.
Three O-ring seal A are provided with between described hold-down ring A and the step surface of gas-charging connection.
Three O-ring seal B are provided with between described hold-down ring B and the fin of swivel nut.
By arranging multiple-sealed circle, improve stability and the reliability of sealing place sealing property.
To sum up, the beneficial effects of the utility model are:
The utility model is convenient to reject the product having welded structure defect and leakage defect in process of production in time, guarantees that the product being installed on equipment meets technical requirement.
The helium leak test pick-up unit design that the utility model provides is unique, easy to operate, and whole detection installation operation does not damage product, and the quality inspection both having met product requires, in turn ensure that the integrality of product.
The utility model makes probe gas be packed into the inside of measured piece and airtight, and the probe gas of the same pressure is all born at each position of whole weld seam, probe gas and bead contact evenly, comprehensive, accelerate leak detection speed, saved probe gas.
The utility model avoids the possibility causing testing result there are differences because of individual operations difference, and operating process consistance and testing result consistance by force, make reliable results of hunting leak.
Accompanying drawing explanation
Fig. 1 is the structural representation using the utility model pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus end plug-outer envelope weld seam to be carried out to helium leak test;
Fig. 2 puts into indoor structural representation product being imposed to pressurized helium of helium by manufacturing the electrical heating elements after completing;
Fig. 3 is the structural representation purging purifying electric heater element surface;
Fig. 4 puts into completing the electrical heating elements after purging the structural representation that vacuum chamber carries out helium leak test detection;
Fig. 5 is the structural representation of pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus of the present utility model.
Mark and corresponding parts title in accompanying drawing:
1-end plug-outer envelope assembly, 2-vacuum pump, 3-helium tank, 4-leak locator, 5-electrical heating elements, 6-helium room, 7-nitrogen cylinder, 8-vacuum chamber, 9-outer envelope, 10-gas-charging connection, 11-gland nut, 12-hold-down ring A, 13-O-ring seal A, 14-air hole A, 15-swivel nut, 16-O-ring seal B, 17-hold-down ring B, 18-threaded cap, 19-fin, 20-vacuum connects mouth, 21-end plug.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but embodiment of the present utility model is not limited thereto.
Embodiment:
As shown in Figure 5, pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus, comprise the seal assembly A being installed on outer envelope 9 openend and the seal assembly B being set in outer envelope 9 end plug installation end outside, seal assembly A is connected with the inner wall sealing of outer envelope 9, the outer wall of seal assembly B and outer envelope 9 is tightly connected, seal assembly B, outer envelope 9 and end plug 21 form airtight chamber, the inside of seal assembly A is provided with one and is communicated with air hole A14 that is extraneous and outer envelope 9 inside, the inside of seal assembly B is provided with a vacuum being communicated with the external world and airtight chamber and connects mouth 20.
By adopting this pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus, end plug-outer envelope assembly can keep existing structure just can carry out this end plug-outer envelope weld seam helium leak test.
Described seal assembly A comprises gas-charging connection 10, gland nut 11, hold-down ring A12 and O-ring seal A13, gas-charging connection 10 is made up of the path cylindrical portion connected successively and large footpath cylindrical portion, described air hole A14 is arranged at and runs through gas-charging connection 10 inside and axially run through gas-charging connection 10, the large footpath cylindrical portion of gas-charging connection 10 stretches into the openend of outer envelope 9, the outside surface of path cylindrical portion is provided with screw thread, path cylindrical portion is set with gland nut 11 successively, hold-down ring A12 and O-ring seal A13, gland nut 11 is connected by screw thread and small column portion, O-ring seal A13 is pressed on the annular table terrace of large footpath cylindrical portion by hold-down ring A12 by gland nut 11, outer envelope 9 inwall and gas-charging connection 10 outer rim are formed be tightly connected.
Described seal assembly B comprises swivel nut 15, O-ring seal B16, hold-down ring B17 and threaded cap 18, the tubular of swivel nut 15 in both ends open, the tubular of threaded cap 18 in one end open, the outside surface of threaded cap 18 cylinder side wall is provided with external thread, the inside surface of swivel nut 15 cylinder side wall is provided with internal thread, one end of swivel nut 15 arranges one end of opening in threaded cap 18 by thread set, the inwall of the other end of swivel nut 15 is provided with ringwise fin 19, one end that outer envelope 9 connects end plug 21 is stretched in the cavity of threaded cap 18 through after swivel nut 15, be disposed with between the fin 19 of swivel nut 15 and the end face of threaded cap 18 and be set in O-ring seal B16 on outer envelope 9 and hold-down ring B17, O-ring seal B16 is pressed on the fin 19 of swivel nut 15 by hold-down ring B17 by threaded cap 18, make threaded cap 18, O-ring seal B16, outer envelope 9 and end plug 21 form airtight chamber, described vacuum connects mouth 20 and arranges with on threaded cap 18, and this vacuum connects the inner space that mouth 20 is communicated with the external world and threaded cap 18, connect mouth 20 by this vacuum to realize vacuumizing described airtight chamber.
This pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-seal assembly A of outer envelope weld seam helium-leakage detecting apparatus and the structure of seal assembly B are that the structure being combined with end plug-outer envelope assembly carries out designing, the structure of seal assembly A and seal assembly B ensure that seal chamber favorable sealing property in testing process, thus ensure that the reliability of testing result.Meanwhile, easy disassembly, sealing, be easy to operation, improve work efficiency.
Three O-ring seal A13 are provided with between described hold-down ring A12 and the step surface of gas-charging connection 10.
Three O-ring seal B16 are provided with between described hold-down ring B17 and the fin 19 of swivel nut 15.
By arranging multiple-sealed circle, improve stability and the reliability of sealing place sealing property.
During use, air hole A14 is connected vacuum pump 2 and helium tank 3 respectively by pipeline, the linkage section of the gas outlet end of helium tank 3, the air intake opening end of vacuum pump 2 and air hole A14 is provided with operation valve, thus controls air hole A14 and be connected with vacuum pump 2 and vacuumize or air hole A14 is connected with helium tank 3 and fills helium to outer envelope 9 inside.Vacuum connects mouth 20 and connects leak locator 4 by pipeline.
Adopt described pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus to carry out pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements sealing structure detection method, comprise the following steps:
S1, use pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus carry out helium leak test to end plug-outer envelope weld seam, as shown in Figure 1;
S2, electrical heating elements 5 use overall helium-leakage detecting apparatus to carry out overall helium leak test to product, as shown in Figure 2, Figure 3, Figure 4 after manufacturing completion.
Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements is detected by adopting helium leak test method, especially helium leak test has been carried out for end plug-outer envelope weld seam separately, and then helium leak test is carried out to whole electrical heating elements, ensure that the sealing of the electrical heating elements by detecting can meet actual operation requirements, stopped testing result qualified, and actual use in the generation of the incomplete situation of sealing.
Before described step S1, further comprising the steps of:
A1, in electrical heating elements 5 production phase, guarantee the defects such as weld seam inner pore-free, slag inclusion, crackle, radioscopy is carried out to end plug-outer envelope weld seam;
After A2, end plug-outer envelope weld seam radioscopy is qualified, butt welded seam table carries out liquid penetration examination; After end plug-outer envelope weld seam liquid penetration examination is qualified, then carry out the detection of S1 step.
Because helium is a kind of rare gas, use helium leak test cost higher, therefore, preferably, the method that first the utility model adopts ray detection, Liquid Penetrant to survey, weeds out the obvious substandard products of sealing property defect, both the detected pressures of helium leak test operation had been alleviated, save helium to greatest extent again, thus under the reliable prerequisite of guarantee testing result, reduce testing cost.
Shown in composition graphs 1, described step S1 comprises following sub-step:
S11, the seal assembly A of sealing outer envelope 9 opening is installed at outer envelope 9 openend of end plug-outer envelope assembly 1, seal assembly A has the air hole A14 being communicated with outer envelope 9 inner space, air hole A14 connects vacuum pump 2 and helium gas source respectively by pipeline, in the present embodiment, helium gas source is helium tank 3, outer envelope 9 inside is vacuumized by air hole A14 by vacuum pump 2, then be filled with the helium of certain pressure to outer envelope 9 inside by helium gas source, if helium pressure is 0.125 ~ 0.2Mpa, and pressurize is no less than 120 minutes;
S12, then at the outside of the end plug installation end of the outer envelope 9 of end plug-outer envelope assembly 1 suit seal assembly B, the inside of seal assembly B has a cavity A, end plug 21 is positioned at this cavity A, the outer wall of seal assembly B and outer envelope 9 is tightly connected, thus make cavity A become airtight cavity, the body of seal assembly B also has the air hole B that is communicated with cavity A; After being vacuumized cavity A by air hole B, keep the vacuum seal state of cavity A, and make air hole B connect leak locator 4 by pipeline, leak locator 4 is helium mass spectrometer leak detector 4, thus completes detection.
For the architectural feature of end plug-outer envelope assembly, the utility model proposes above-mentioned end plug-outer envelope weld seam helium leak test scheme, the program ensure end plug-outer envelope modular construction complete, can not impaired while, the stability of testing process and the reliability of testing result can be guaranteed, the program can at utmost solve the problem that may cause testing result instability due to operating personnel's difference, overcomes the impact of human factor on testing result to greatest extent.And the program makes probe gas be packed into the inside of measured piece and airtight, the probe gas of the same pressure is all born at each position of whole weld seam, probe gas and bead contact evenly, comprehensive, accelerate leak detection speed, save probe gas, also made testing result stable, reliable.
Described step S2 comprises following sub-step:
S21, as shown in Figure 2, electrical heating elements 5 after manufacture completion is put into helium room 6 pressurized helium is imposed to product, namely in airtight helium room 6, passed into the helium of certain pressure by helium tank 3, if helium pressure is 0.125 ~ 0.2Mpa, and pressurize is no less than 120 minutes;
S22, then taking-up electrical heating elements 5 also purge purification surface, and the jet gun as being connected with nitrogen cylinder 7 by employing purges electrical heating elements 5, removes the helium of complete electrical heating elements 5 surface attachment, as shown in 3 figure;
S23, put into vacuum chamber 8 by completing the electrical heating elements after purging 5, leak locator 4 is inner by pipeline connection vacuum chamber 8, and leak locator 4 is helium mass spectrometer leak detector 4, thus completes detection, as shown in Figure 4.
For structure and the request for utilization of electrical heating elements, the utility model proposes the overall helium leak test scheme of above-mentioned electrical heating elements, the equipment of program handled easily, employing is simple, the same program is still the technical scheme adopting pressurized helium and workpiece for measurement comprehensive engagement, can guarantee the stability of testing process and the reliability of testing result.
The utility model, by after end plug-outer envelope weld seam RT detection (ray detection), PT detection (Liquid penetrant testing) is qualified, detects the sealing of this weld seam further, adopts helium leak test method.As shown in Figure 5, install in outer envelope 9 side and fill helium sealing plug and seal assembly A, outer envelope 9 inwall and gas-charging connection 10 outer rim are formed be tightly connected, between gas-charging connection 10, outer envelope 9, end plug 21, set up independently annular seal space, shown in Fig. 1, gas-charging connection 10 is connected with He source of the gas, after forevacuum completes, open charging valve, fill the helium of certain pressure to outer envelope 9 inside, and pressurize 15 minutes at least.Then according to shown in Fig. 5, right side vacuum detecting frock and seal assembly B are installed, at swivel nut 15, O-ring seal B16, hold-down ring B17, set up vacuum seal chamber between threaded cap 18 and end plug 21, shown in Fig. 1, connect mouth 20 by vacuum to be connected with leak locator 4, thus complete detection.
After electrical heating elements 5 all completion, shown in Fig. 2, in helium room, 6 pairs of products impose pressurized helium; Pressurize, after 30 minutes, is taken out electrical heating elements 5 and purges purification surface, as Fig. 3; Put into vacuum chamber 8 subsequently, as shown in Figure 4, overall vacuum helium leak test detection is carried out to electrical heating elements 5.
As mentioned above, the utility model can be realized preferably.

Claims (5)

1. pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus, it is characterized in that, comprise the seal assembly A being installed on outer envelope (9) openend and the seal assembly B being set in outer envelope (9) end plug installation end outside, seal assembly A is connected with the inner wall sealing of outer envelope (9), the outer wall of seal assembly B and outer envelope (9) is tightly connected, seal assembly B, outer envelope (9) and end plug (21) form airtight chamber, the inside of seal assembly A is provided with one and is communicated with the extraneous air hole A(14 inner with outer envelope (9)), the inside of seal assembly B is provided with a vacuum being communicated with the external world and airtight chamber and connects mouth (20).
2. pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus according to claim 1, it is characterized in that, described seal assembly A comprises gas-charging connection (10), gland nut (11), hold-down ring A(12) and O-ring seal A(13), gas-charging connection (10) is made up of the path cylindrical portion connected successively and large footpath cylindrical portion, described air hole A(14) be arranged at and run through gas-charging connection (10) inside and axially run through gas-charging connection (10), the large footpath cylindrical portion of gas-charging connection (10) stretches into the openend of outer envelope (9), the outside surface of path cylindrical portion is provided with screw thread, path cylindrical portion is set with successively gland nut (11), hold-down ring A(12) and O-ring seal A(13), gland nut (11) is connected by screw thread and small column portion, gland nut (11) is by hold-down ring A(12) by O-ring seal A(13) be pressed on the annular table terrace of large footpath cylindrical portion, outer envelope (9) inwall and gas-charging connection (10) outer rim are formed be tightly connected.
3. pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus according to claim 1 and 2, it is characterized in that, described seal assembly B comprises swivel nut (15), O-ring seal B(16), hold-down ring B(17) and threaded cap (18), swivel nut (15) tubular in both ends open, threaded cap (18) tubular in one end open, the outside surface of threaded cap (18) cylinder side wall is provided with external thread, the inside surface of swivel nut (15) cylinder side wall is provided with internal thread, one end of swivel nut (15) arranges one end of opening in threaded cap (18) by thread set, the inwall of the other end of swivel nut (15) is provided with ringwise fin (19), one end that outer envelope (9) connects end plug (21) is stretched in the cavity of threaded cap (18) through after swivel nut (15), the O-ring seal B(16 be set on outer envelope (9) is disposed with between the fin (19) of swivel nut (15) and the end face of threaded cap (18)) and hold-down ring B(17), threaded cap (18) is by hold-down ring B(17) by O-ring seal B(16) be pressed on the fin (19) of swivel nut (15), make threaded cap (18), O-ring seal B(16), outer envelope (9) and end plug (21) form airtight chamber, described vacuum connects mouth (20) and arranges with on threaded cap (18), and this vacuum connects the inner space that mouth (20) is communicated with the external world and threaded cap (18).
4. pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus according to claim 2, is characterized in that, described hold-down ring A(12) and gas-charging connection (10) step surface between be provided with three O-ring seal A(13).
5. pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus according to claim 3, is characterized in that, described hold-down ring B(17) and swivel nut (15) fin (19) between be provided with three O-ring seal B(16).
CN201520026696.5U 2015-01-15 2015-01-15 Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus Withdrawn - After Issue CN204332390U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520026696.5U CN204332390U (en) 2015-01-15 2015-01-15 Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520026696.5U CN204332390U (en) 2015-01-15 2015-01-15 Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus

Publications (1)

Publication Number Publication Date
CN204332390U true CN204332390U (en) 2015-05-13

Family

ID=53168718

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520026696.5U Withdrawn - After Issue CN204332390U (en) 2015-01-15 2015-01-15 Pressurized-water reactor nuclear power plant voltage stabilizer electrical heating elements end plug-outer envelope weld seam helium-leakage detecting apparatus

Country Status (1)

Country Link
CN (1) CN204332390U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104637556A (en) * 2015-01-15 2015-05-20 中国核动力研究设计院 Method for detecting airtight structure of electrical heating element of pressure stabilizer in pressurized water reactor nuclear power station and end-plug and casing weld joint helium leak detection device
CN105181267A (en) * 2015-07-17 2015-12-23 武汉工程大学 Device for testing leakage rate of bolted flange connection system
CN105372013A (en) * 2015-12-14 2016-03-02 贵州红林机械有限公司 Method for finding micro leakage points of helium-filled temperature sensor assembly
CN109991091A (en) * 2017-12-29 2019-07-09 中国核动力研究设计院 The experimental rig of metal material creep under a kind of in-pile irradiation environment
CN110130809A (en) * 2019-05-29 2019-08-16 中国核动力研究设计院 A kind of shield gasket door gear for radioactive cell
CN110440998A (en) * 2019-07-30 2019-11-12 核工业第八研究所 A kind of composite material of silicon carbide round tube leak rate method for testing performance

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104637556A (en) * 2015-01-15 2015-05-20 中国核动力研究设计院 Method for detecting airtight structure of electrical heating element of pressure stabilizer in pressurized water reactor nuclear power station and end-plug and casing weld joint helium leak detection device
CN104637556B (en) * 2015-01-15 2017-05-31 中国核动力研究设计院 Pressurized-water reactor nuclear power plant voltage-stablizer electrical heating elements sealing structure detection method and device
CN105181267A (en) * 2015-07-17 2015-12-23 武汉工程大学 Device for testing leakage rate of bolted flange connection system
CN105181267B (en) * 2015-07-17 2018-06-08 武汉工程大学 For testing the device of Bolted Flanged Connection system leak rate
CN105372013A (en) * 2015-12-14 2016-03-02 贵州红林机械有限公司 Method for finding micro leakage points of helium-filled temperature sensor assembly
CN105372013B (en) * 2015-12-14 2018-12-04 贵州红林机械有限公司 The method for searching the temperature sensor assembly tiny leakage point full of helium
CN109991091A (en) * 2017-12-29 2019-07-09 中国核动力研究设计院 The experimental rig of metal material creep under a kind of in-pile irradiation environment
CN110130809A (en) * 2019-05-29 2019-08-16 中国核动力研究设计院 A kind of shield gasket door gear for radioactive cell
CN110440998A (en) * 2019-07-30 2019-11-12 核工业第八研究所 A kind of composite material of silicon carbide round tube leak rate method for testing performance

Similar Documents

Publication Publication Date Title
CN204832085U (en) Height warm purgation combustible gas explosion characteristic testing experiment device
CN204740107U (en) O type sealing washer leak rate detection device
CN100578176C (en) Detecting method for flexible packing products air tightness
JP2001236986A (en) Method of inspecting gastightness of battery
KR20070116050A (en) Apparatus and process for leak-testing and qualification of fluid dispensing vessels
CN202854298U (en) Sulphur hexafluoride inflatable circuit breaker insulation state on-line monitoring device
CN103383371B (en) In-situ electrochemical mass spectrum detection system and method thereof
CN104048801B (en) Charge air cooler visual detection pressure testing table
CN104568336A (en) Helium mass spectrometer leak detection method for sealing workpiece
CN202362120U (en) Device for quickly detecting air tightness
CN107907278B (en) A kind of method for conducting leak test of power transformer oil conservater capsule
CN202793700U (en) Air leakage detection device for welding joint
CN109282944B (en) Method for verifying sealing reliability of composite sealing element in ultralow temperature environment
CN108414158B (en) Automatic pressure maintaining testing device and testing method for oil tank sealing test
CN103091052B (en) Normal temperature vacuum leak-detection system used for spacecraft part assembly
CN204573395U (en) A kind of butt welding sampling peculiar to vessel and leak detection flange
CN105358951B (en) Leakage Test device and Leakage Test method
CN104132786B (en) A kind of quick-speed leak detection method suitable for UHV
CN203432757U (en) Airtightness detection device for sealed wire holder
CN103486440A (en) Rapid vacuum pumping and gas filling recycling connecting device, vacuum pumping method and gas filling method
JP2007147327A (en) Air leakage inspection device
CN103424486A (en) System and method for detecting performance of transformer oil chromatography online monitoring device
WO2020224632A1 (en) Method for testing leakage performance of aerospace composite material member in low temperature environment
CN102426082A (en) Method for detecting leak of lithium ion storage battery before liquid injection and sealing
CN205826241U (en) Air-tightness detection device

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20150513

Effective date of abandoning: 20170531

AV01 Patent right actively abandoned