CN208333779U - A kind of leakage detection apparatus of non-cavity body structure part - Google Patents

A kind of leakage detection apparatus of non-cavity body structure part Download PDF

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Publication number
CN208333779U
CN208333779U CN201821068508.5U CN201821068508U CN208333779U CN 208333779 U CN208333779 U CN 208333779U CN 201821068508 U CN201821068508 U CN 201821068508U CN 208333779 U CN208333779 U CN 208333779U
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China
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piece
helium
holder
workpiece
grip mechanism
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CN201821068508.5U
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夏泓玮
文雄伟
余伟
吴峰
薛林
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Tsinghua University
Beijing Pins Medical Co Ltd
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Tsinghua University
Beijing Pins Medical Co Ltd
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Abstract

The utility model belongs to helium mass spectrometer leak detecting technology field, and in particular to a kind of leakage detection apparatus of non-cavity body structure part, comprising: helium mass spectrometer leak detector, workpiece grip mechanism, blowing pipeline, helium gas source and discharge line and mechanical pump;One end of the blowing pipeline is connected with the workpiece grip mechanism, and the other end is connected with the helium gas source;One end of the discharge line is connected with the blowing pipeline, and the other end is connected with the mechanical pump;The workpiece grip mechanism includes piece-holder top and piece-holder lower part;The piece-holder top can clamp the side of the structural member, form airtight sealing, and be connected to one end of the blowing pipeline;The piece-holder lower part can clamp the other side of the structural member, form airtight sealing, and be connected to the helium mass spectrometer leak detector.The utility model can be realized the workpiece quick leak-checking of non-cavity body structure, and can achieve the effect that continuous batch is hunted leak.

Description

A kind of leakage detection apparatus of non-cavity body structure part
Technical field
The utility model belongs to helium mass spectrometer leak detecting technology field, and in particular to a kind of leakage detection apparatus of non-cavity body structure part.
Background technique
It is tens of that helium mass analyzer is widely used in aerospace, medical treatment, nuclear industry, electric power, refrigeration, precision instrumentation etc. A industry.The mode of leak detection has back pressure method, blowing process etc..The examined workpiece of some cavity body structure forms be easy to using back pressure method or The basic principle of blowing process improves leak detection, rather than the workpiece of cavity body structure form is then more complicated, and especially batch is hunted leak Realize process-intensive.
Non- cavity body structure part usually makes corresponding tooling, and workpiece is assemblied in tooling, utilizes glue envelope or mechanical grip shape It at seal cavity, is then placed into pressure helium tank, presses helium 1-4h at 0.2 mpa, then pressure release, stands 15 minutes or nitrogen is blown Except absorption helium.This kind of mode process is various, and examined workpiece quantity is limited by tooling quantity, and examined workpiece needs gluing or machine The mode and tooling of tool clamping, which are formed, to be tightly connected, workpiece subject to damage, and the tested leak rate of maximum is by gluing seal form and glue The influence of sealing performance.
Therefore, designing a kind of batch leakage detection apparatus for being suitble to non-cavity body structure has realistic meaning, is able to solve engineering reality Border problem.
Utility model content
In response to the above problems, the present invention proposes a kind of leakage detection apparatus of non-cavity body structure part.
A kind of leakage detection apparatus of non-cavity body structure part, comprising: helium mass spectrometer leak detector, workpiece grip mechanism, blowing pipeline, helium Gas source and discharge line and mechanical pump;
One end of the blowing pipeline is connected with the workpiece grip mechanism, and the other end is connected with the helium gas source;It is described One end of discharge line is connected with the blowing pipeline, and the other end is connected with the mechanical pump;
The workpiece grip mechanism includes piece-holder top and piece-holder lower part;The piece-holder top can press from both sides The side of the structural member is held, forms airtight sealing, and be connected to one end of the blowing pipeline;The piece-holder lower part The other side of the structural member can be clamped, forms airtight sealing, and be connected to the helium mass spectrometer leak detector.
Preferably, multiple workpiece grip mechanisms in parallel on one end of the blowing pipeline, realize that batch is hunted leak.
Preferably, the helium gas source is 3~5ml/min to the blowing amount for being blown helium in blowing pipeline.
Preferably, the helium mass spectrometer leak detector can execute detection program automatically, detect and leak from the tested structural member The helium crossed.
Preferably, the mechanical pump pumping speed is 3~5L/S.
Preferably, the workpiece grip mechanism further includes piece-holder upper sealing gasket and piece-holder lower seal circle.
Preferably, the piece-holder upper sealing gasket and piece-holder lower seal circle are removably mounted on institute respectively State piece-holder top and the piece-holder lower part.
Preferably, described device further includes gas control system, can control helium blowing, discharge.
Preferably, the gas control system includes the first control valve being connected with the helium gas source and the mechanical pump The second connected control valve, and the third control valve being connected with the workpiece grip mechanism.
Preferably, when batch is hunted leak, the gas control system can be controlled and each workpiece grip mechanism point Not Xiang Lian the third control valve independently successively work or work at the same time.
The utility model has the beneficial effects that
1, the utility model provides leakage detection apparatus and can be realized non-by the design of gas piping system and control system The rapid batch of the workpiece of cavity body structure is hunted leak.
2, leakage detection apparatus provided by the utility model, smart structural design, whole device gas path pipe form close with workpiece Envelope, the helium for leaking hunting will not be leaked in leak detector surrounding air, and leak detector work efficiency drop or helium is caused to be poisoned, To achieve the effect that continuous batch is hunted leak.
3, leakage detection apparatus provided by the utility model, piece-holder part can be made into multiple-branching construction, it can be achieved that a branch During leak detection, multiple workpiece installation sites can also be arranged in same branch, realize " more for another branch's workpiece assembly Road more than one piece " leak detection, convenient for improving leak detection efficiency.
4, leakage detection apparatus provided by the utility model need to only change design piece-holder part-structure, can examine various energy The non-tight part of upper-lower seal form is enough formed, it is applied widely, quick repetitive leakage detection may be implemented.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the air-tightness leakage detection apparatus of the non-cavity body structure part of two branches;
Fig. 2A specific embodiment is a kind of structural schematic diagram that can examine workpiece;
Fig. 2 B, Fig. 2 C are suitable for the clamp structure schematic diagram of Fig. 2A embodiment workpiece.
In figure, 1- helium mass spectrometer leak detector, 2- workpiece grip mechanism, 3- blowing pipeline, 4- solenoid valve, 5- mechanical pump, 6- row Gas outlet, 7- helium gas source, 8- gas exhaust piping, 10- be detected structural member, 11- conducting wire, 12- insulator, 13- flange, 14- conducting wire and Insulator connection gap, 15- insulator and flanged joint gap, 20- piece-holder top, 21- piece-holder upper sealing gasket, 22- piece-holder lower seal circle, 23- jet pipe interface, 24- helium mass spectrometer leak detector interface, 25- piece-holder lower part.
Specific embodiment
With reference to the accompanying drawing, it elaborates to embodiment.
The leakage detection apparatus of a kind of non-cavity body structure part according to the present utility model, comprising: helium mass spectrometer leak detector, piece-holder Mechanism, blowing pipeline, helium gas source and discharge line and mechanical pump.
One end of the blowing pipeline is connected with the workpiece grip mechanism, and the other end is connected with the helium gas source;It is described One end of discharge line is connected with the blowing pipeline, and the other end is connected with the mechanical pump.
The workpiece grip mechanism includes piece-holder top and piece-holder lower part;The piece-holder top can press from both sides The side of the structural member is held, forms airtight sealing, and be connected to one end of the blowing pipeline;The piece-holder lower part The other side of the structural member can be clamped, forms airtight sealing, and be connected to the helium mass spectrometer leak detector.
Injection tube road two or more workpiece grip mechanisms in parallel, realize that examined workpiece batch is stopped leakage in the roof.The helium Gas source is used to be blown helium in blowing pipeline.The helium mass spectrometer leak detector is detected after vacuumizing to cavity and is leaked through from examined workpiece Helium.Residual helium after the completion of the mechanical pump is used to will test is extracted out.It is disposed with multiple control valves in the pipeline, controls Helium processed is blown, is discharged.
It is cooperated by integrated control system, can be realized key leak detection, a key stops.The utility model by pair The improvement of helium mass spectrometer leak detector, the design of piece-holder part can be realized the quick essence of the encapsulating structure part of non-cavity form Really leak detection, for example, electric connector.The quick repetitive leakage detection of the utility model air-tightness leakage detection apparatus energy, does not almost have examined workpiece It has damage, hunts leak high-efficient, especially suitable in, the workpiece of small size batch leak detection.
When leak detection work, Gas injection pipeline carries out blowing helium to the survey, and blowing amount is 3~5ml/min.Leak detection work When, helium mass analyzer vacuumizes the survey, measures leak case.
Mechanical pump pumping speed is 3~5L/S, and when workpiece leak detection is completed, remaining helium is extracted into outdoor by mechanical pump, prevents from examining Leak the poisoning of instrument helium.
The workpiece grip mechanism is made of upper and lower two parts, and upper and lower two parts all have for forming sealing with workpiece Sealing ring.When work, wherein by piece-holder, upper part connects blowing pipeline jet, and lower part connects leak detector, pumping Leak detection.The workpiece grip mechanism can be one, it is two or more, form branch, can independent control, reach it is primary simultaneously or It hunts leak respectively multiple workpiece.
Sealing ring is made by being molded, and material is silicon rubber, is also possible to other high molecular materials for being not easy to adsorb helium.Institute The sealing ring for stating clamp structure regularly replaces during use, prevents helium from remaining, and reduces precision of detecting leak gas.
Fig. 1 gives a kind of schematic diagram of the air-tightness leakage detection apparatus of non-cavity body structure part.The leakage detection apparatus includes: helium matter Spectrum leak detector 1, Gas injection pipeline 3, solenoid valve 4 (DV1, DV2, DV3, DV4), mechanical pump 5, is vented out workpiece grip mechanism 2 Mouth 6, helium gas source 7, gas exhaust piping 8, helium mass spectrometer leak detector 1, adscititious gases blowing pipeline 3 cooperate with work by integrated control system Make.This air-tightness leakage detection apparatus can be realized key leak detection, and a key stops, and meet batch leak detection demand.
Fig. 2A gives a kind of schematic diagram of non-cavity body structure electric connector workpiece 10 that need to be hunted leak, mainly by conducting wire 11, insulator 12, flange 13 form, and need to detect conducting wire 11 and 12 connection gap 14 of insulator, and insulator 12 and flange 13 connect The airtight implementations of seam gap 15.
Fig. 2 B, Fig. 2 C give the corresponding tooling retained part structure design diagram of examined workpiece 10, mainly by Piece-holder top 20, piece-holder upper sealing gasket 21, piece-holder lower seal circle 22, jet pipe interface 23, helium matter Leak detector interface 24 is composed to form.
When being hunted leak using this leakage detection apparatus to the workpiece, specific works action process is as follows:
Gas source is opened manually, adjusts the pressure value exported to needs.Mass spectrograph working power is opened manually.Two quilts are installed Survey part.Workpiece 10 is installed, 10 side of workpiece clamped by piece-holder top 20, form airtight sealing, and with jet pipeline Connection.The other side of examined workpiece 10 forms airtight sealing by the clamping of piece-holder lower part 25, and with helium mass spectrometer leak detector 1 It is connected to by helium mass spectrometer leak detector interface 24.Leakage detection apparatus start key is clicked, solenoid valve DV1 is opened, the inspection of 1 automatic running of leak detector Program is leaked, (time can set 3-99S) solenoid valve DV3 opens (solenoid valve DV3 when starting first via tooling clamping device after X second Open, solenoid valve DV4 is opened when starting the second tunnel tooling clamping device), after obtaining result, click leakage detection apparatus stop key, inspection Leakage instrument 1 stops working, and solenoid valve DV1 is closed.Mechanical pump 5 is opened, and solenoid valve DV2 is opened, after X seconds (time can set 3-99S), electricity Magnet valve DV3 closes (solenoid valve DV3 closing when starting first via tooling clamping device, electricity when starting the second tunnel tooling clamping device Magnet valve DV4 is closed).Subsequent solenoid valve DV2 is closed, and mechanical pump 5 is closed.
This embodiment is only the preferable specific embodiment of the utility model, but the protection scope of the utility model not office It is limited to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in Change or replacement should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with Subject to scope of protection of the claims.

Claims (10)

1. a kind of leakage detection apparatus of non-cavity body structure part characterized by comprising helium mass spectrometer leak detector (1), workpiece grip mechanism (2), pipeline (3), helium gas source (7) and discharge line (8) and mechanical pump (5) are blown;
One end of blowing pipeline (3) is connected with the workpiece grip mechanism (2), and the other end is connected with the helium gas source (7); One end of the discharge line (8) is connected with the blowing pipeline (3), and the other end is connected with the mechanical pump (5);
The workpiece grip mechanism (2) includes piece-holder top (20) and piece-holder lower part (25);In the piece-holder Portion (20) can clamp the side of the structural member, form airtight sealing, and be connected to one end of blowing pipeline (3); The piece-holder lower part (25) can clamp the other side of the structural member, form airtight sealing, and with the helium matter Compose leak detector (1) connection.
2. device according to claim 1, which is characterized in that multiple workpiece clamps in parallel on one end of blowing pipeline (3) It holds mechanism (2), realizes that batch is hunted leak.
3. device according to claim 1 or claim 2, which is characterized in that the helium gas source (7) is to blowing helium in blowing pipeline (3) The blowing amount of gas is 3~5mL/min.
4. device according to claim 3, which is characterized in that the helium mass spectrometer leak detector (1) can execute detection journey automatically Sequence detects the helium leaked through from the tested structural member.
5. device according to claim 1 or 2 or 4, which is characterized in that mechanical pump (5) pumping speed is 3~5L/s.
6. the apparatus according to claim 1, which is characterized in that the workpiece grip mechanism further includes that piece-holder top is close Seal (21) and piece-holder lower seal circle (22).
7. device according to claim 6, which is characterized in that the piece-holder upper sealing gasket (21) and piece-holder Lower seal circle (22) is removably mounted on the piece-holder top (20) and the piece-holder lower part (25) respectively.
8. device according to claim 1 or 2 or 4, which is characterized in that further include gas control system, helium can be controlled Gas blowout is blown, is discharged.
9. device according to claim 8, which is characterized in that the gas control system includes and the helium gas source (7) phase The first control valve (DV1) even, the second control valve (DV2) for being connected with the mechanical pump, and with the workpiece grip mechanism (2) connected third control valve (DV3, DV4).
10. device according to claim 9, which is characterized in that when batch is hunted leak, the gas control system can be controlled The third control valve (DV3, DV4) that system is respectively connected with each workpiece grip mechanism (2) independently successively work or same When work.
CN201821068508.5U 2018-07-06 2018-07-06 A kind of leakage detection apparatus of non-cavity body structure part Active CN208333779U (en)

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CN201821068508.5U CN208333779U (en) 2018-07-06 2018-07-06 A kind of leakage detection apparatus of non-cavity body structure part

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Application Number Priority Date Filing Date Title
CN201821068508.5U CN208333779U (en) 2018-07-06 2018-07-06 A kind of leakage detection apparatus of non-cavity body structure part

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111747758A (en) * 2019-03-28 2020-10-09 日本碍子株式会社 Method for manufacturing ceramic product containing silicon carbide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111747758A (en) * 2019-03-28 2020-10-09 日本碍子株式会社 Method for manufacturing ceramic product containing silicon carbide

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