CN108225685B - A kind of gas leak detection apparatus and its detection method - Google Patents
A kind of gas leak detection apparatus and its detection method Download PDFInfo
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- CN108225685B CN108225685B CN201711441961.6A CN201711441961A CN108225685B CN 108225685 B CN108225685 B CN 108225685B CN 201711441961 A CN201711441961 A CN 201711441961A CN 108225685 B CN108225685 B CN 108225685B
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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
- G01M3/202—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 using mass spectrometer detection systems
- G01M3/205—Accessories or associated equipment; Pump constructions
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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
- G01M3/226—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 containers, e.g. radiators
- G01M3/227—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 containers, e.g. radiators for flexible or elastic containers
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention provides a kind of gas leak detection apparatus and its detection method, high efficiency and highly sensitive detection can be carried out to the gas leakage of airtight container in the air high, and the air-tightness for being suitable for large-size pliable structure container quickly detects and positioning.The present invention carries mass spectroscopy device using positioning component of creeping, the single leak source of dirigible is quantified and positioned using tracer gas technique in high-altitude, realization rapidly and efficiently detects, in addition the fast pump that the present invention passes through vacuum pump, it is in the shortest time that the gas in certain volume is centrally stored in a vacuum chamber, improve gas collection ability；Mass spectroscopy device is sampled detection to the concentration mixed gas in vacuum chamber using circulating fan, improves equipment detection efficiency.The present invention carries out gas collecting with gas collection unit using blowing and increases injection hole relative to general gas collecting apparatus, improves the sensitivity of detection.The function of sucker itself is that negative-pressure adsorption is detected target, while also having air suction function.
Description
Technical field
The invention belongs to dirigible surface detection technique fields, are based on trace gas leak detection method, and in particular to a kind of gas
Leak detecting device and its detection method.
Background technique
Dirigible is a kind of aircraft by helium as buoyance lift gas offer buoyancy.The illiteracy of dirigible especially stratospheric airship
Skin material be weathering layer, barrier layer, tissue layer and adhesive layer composition laminated composite material, it is desirable that its with high specific strength,
The performances such as high-barrier, anti-aging.Therefore, helium leakage amount is an important performance indexes of dirigible utricule skin material, helium
Leakage mainly includes two ways: one is the leakage of helium scattering and permeating, helium is material through the infiltration leakage of skin material
Feature possessed by attribute itself, unavoidably；Another is microvoid damage leakage, and microvoid damage leakage is due to covering material
Helium gas inside leakage caused by being damaged caused by during material manufacture, utricule processing, utricule transhipment, detection test.Local micropore
Helium leakage caused by damage is permeated much larger than film diffusion, and there are when larger pressure difference especially inside and outside dirigible utricule, micropore is damaged
With pressure change deformation of developing can occur for wound, be resident performance to dirigible and produce serious influence.
It can be seen that being necessary to the detection of microvoid damage leakage, dirigible is using helium as buoyance lift gas
Guarantee the high-air-tightness requirement of dirigible, it is necessary to detection positioning be carried out to micropore leakage by certain technological means and repaired.Dirigible
Covering defects detection content includes leakage judgement and leak hole positioning.Tradition dirigible defect inspection method is mainly pressure change at present
Method, artificial soap bubble method and luminescence method.But due to the influence and kayak body of dirigible material surface coating when the use of pressure change method
The problem of enormous size, is only used for the measurement total leakage rate of dirigible, defective locations can not be accurately positioned；Artificial soap bubble method operation is tired
Hardly possible, detection time is long, resolution ratio is low and easy missing inspection；Luminescence method resolution ratio is low, the property examined is poor and recall rate is low.Traditional
Several method not can solve the problem of detection of airship envelope defect helium leakage is with positioning.
The one kind of helium mass spectrometer leak detecting technology as trace gas leak detection method is that current sensitivity highest, application range are most wide
Leak hunting technology.External relevant unit has carried out related airship gas leakage detection test using mass spectroscopy device, such as Google's balloon and beauty
The HiSentine high altitude airship of state, although there is certain effect, but there is problems in that efficiency is very low when high altitude operation；
When ship capsule covering is lightweight rapid wear material (especially film-like materials), ship capsule pressure-bearing and weight bearing ability are limited, low pressure-bearing situation
Under, helium leakage amount is low, sensitivity decrease when instrument detects；The collection port of traditional mass spectroscopy device is micro- gun shaped needle tubing structure, collection
Port bore is small (less than 5 millimeters), and gettering efficiency is lower, and it is suitable for the locally subtle detections of Small object, zonule, for big face
The defects detection of product (dirigible surface area generally arrives square meters up to ten thousand thousands of) is not applicable.
Summary of the invention
In view of this, the present invention provides a kind of gas leak detection apparatus and its detection method, it can be high aerial right
The gas leakage of airtight container carries out high efficiency and highly sensitive detection, and is suitable for the gas of large-size pliable structure container
Close property quickly detects and positioning.
The present invention provides a kind of gas leak detection apparatus, including detection components and positioning component of creeping；
The detection components are used to detect the gas leakage of airtight container, including gas gathering mask, vacuum pump, vacuum
Room, circulating fan and mass spectroscopy device；Wherein, gas gathering mask one end is provided with the gas collection hole for collecting gas, other end connection
The inlet end of vacuum chamber, the gas that gas collection hole is collected enter vacuum chamber via gas gathering mask；Vacuum pump is connect with vacuum chamber, is used for
Vacuumize process is carried out to vacuum chamber before detection；Circulating fan connects vacuum chamber and mass spectroscopy device, and the gas in vacuum chamber is defeated
Enter to mass spectroscopy device；The mass spectroscopy device is used to detect the gas componant and gas concentration of input gas, to judge air-tightness
Whether the gas in container is revealed；
Positioning component of creeping is for controlling detection components in airtight container surface creep and positioning.
Wherein, the gas collection hole uses array structure formal distribution.
Wherein, the gas collection hole of gas gathering mask is additionally provided with injection hole on the whole, and injection hole passes through high-pressure air source pipeline and high pressure
Gas source connects, and the gas stored in the high-pressure air source is nitrogen or pure air.
Wherein, the positioning component of creeping realizes positioning by sucker negative-pressure adsorption or interior external device magnetic suck.
Wherein, the positioning component of creeping realizes positioning by sucker negative-pressure adsorption, and vacuum chamber is connect with sucker, passes through suction
The collection of disk progress airtight container surface gas.
Wherein, the positioning component of creeping includes more than two suckers, passes through after the respective pressure reducing valve of each sucker connection and opens
The inlet end that valve I connects vacuum chamber is closed, the outlet side end of vacuum chamber connects vacuum pump by solenoid valve I, connects by switch valve II
Circulating fan is connect, exhaust outlet and needle-valve are successively arranged between circulating fan and mass spectroscopy device；
Gas gathering mask collects the inlet end that the opposite one end of port connects by switch valve IV vacuum chamber with it, and injection hole connection is high
Pressurized air source pipeline, high-pressure air source pipeline are connect by solenoid valve II with high-pressure air source.
Wherein, the sucker uses flexible material.
Wherein, for the positioning component of creeping for absorption climbing robot, the absorption climbing robot includes sucker, two-way
Cylinder, joint adjustment driving motor, support arm curve driving motor and support arm；
Wherein, sucker is fixed on the piston rod end of two-way cylinder, under the action of two-way cylinder control sucker vertically from
It opens or contacts and be detected airtight container surface；Joint adjustment driving motor is used to adjust the posture of sucker, makes sucker and is detected
The fitting of airtight container surface is surveyed, support arm curves rotation and extension and contraction control sucker of the driving motor by control support arm in quilt
Detect the walking of airtight container surface.
Wherein, the absorption climbing robot further includes guide rod, and sucker is controlled under the action of two-way cylinder and is vertically left
Or when contacting detected airtight container surface, guide rod play the guiding role to the movement of sucker.
The present invention also provides a kind of airship envelope defect gas leak detection methods, are filled using above-mentioned gas leak detection
It sets, includes the following steps:
Step 1, air is filled inside dirigible utricule to conformal, is then charged with helium；
Step 2, when initial, gas leak detection apparatus is placed in skin-surface；
Step 3, using vacuum pump by vacuum chamber, so that sucker suction is in airship envelope, and sucker is completed to illiteracy
The collection of skin surface gas；
Step 4, the gas for being detected airtight container surface is collected by gas gathering mask；
The pressure difference that mass spectroscopy device is generated using circulating fan carries out constituent analysis and Concentration Testing to input gas, and with
Background gas compares, and judges whether the gas in airtight container is revealed；
If detection zone background gas is contaminated, then background gas is blown down using the gas that high-pressure air source stores；
Step 5, it after completing Concentration Testing, alternately discharges sucker and movement, the detection device is moved to the next position, weight
Step 3-5 is executed again, until completing the detection of all positions.
The utility model has the advantages that
The present invention carries mass spectroscopy device using positioning component of creeping, in high-altitude using tracer gas technique to the single leak source of dirigible
It is quantified and is positioned, realization rapidly and efficiently detects, and in addition the present invention in the shortest time will by the fast pump of vacuum pump
Gas in certain volume is centrally stored in a vacuum chamber, improves gas collection ability；Mass spectroscopy device utilizes circulating fan pair
Concentration mixed gas in vacuum chamber is sampled detection, improves equipment detection efficiency.
The present invention using gas collection hole carry out gas collection, gas collection hole use array structure formal distribution, leak detection area compared with
In the case where big, it is ensured that vacuum chamber can be rapidly entered in gas gathering mask at every bit by air inlet pipeline, and in load-carrying
It, can gas by increasing the vacuum chamber that connect with gas collection hole and mass spectroscopy device, suitable for large container in the case where permission
Close property is quickly detected and is positioned, and meets the requirement of airship envelope defects detection.
The present invention carries out gas collecting with gas collection unit using blowing and increases blowing relative to general gas collecting apparatus
Hole, when detection zone background exception, external high-pressure air source blows down background by inputting pure gas to injection hole
And dilution, it can obviously reduce background and be detected gas concentration, leakage point leak tested gas again, when detection, makes sky at leakage point
There are notable differences with surrounding air for gas, improve the sensitivity of detection.
The function of sucker itself is that negative-pressure adsorption is detected target, while also having air suction function.Sucker is included in by the present invention
A part of gas collector, while sucker realization device positions, also progress gas collecting, the single for improving device are examined
Area is surveyed, and then is improved work efficiency.
Sucker of the invention uses flexible material, the detection suitable for flexible container.
Detailed description of the invention
Fig. 1 is the overall schematic of gas leak detection apparatus of the present invention.
Wherein: 1- sucker, 2- guide rod, 3- cylinder, the joint 4- adjust driving motor, and 5- support arm curves driving motor, 6-
Vacuum pump, 7- vacuum chamber, 8- circulating fan, 9- mass spectroscopy device, 10- support arm, 11- external power supply power supply, 12- blowing and gas collection
Unit, 13- injection hole, 14- high-pressure air source pipeline, 15- gas collection pipeline (dotted line).
Fig. 2 is end schematic diagram where gas gathering mask gas collection hole of the present invention.
Fig. 3 is the pipeline schematic diagram of gas leak detection apparatus of the present invention.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Embodiment 1: present embodiments providing a kind of gas leak detection apparatus, is individually leaked using tracer gas technique to dirigible
Point is quantified and is positioned, and provides power supply by external power supply power supply 11, detection device includes detection components and positioning group of creeping
Part；
The detection components be used for airship envelope defect gas leakage detect, including blowing with gas collection unit 12,
Vacuum pump 6, vacuum chamber 7, circulating fan 8, mass spectroscopy device 9, high-pressure air source pipeline 14, gas collection pipeline 15 and control valve
Door；
Wherein, blowing and gas collection unit 12 include gas gathering mask and high-pressure air source；Gas gathering mask one end is provided with for collecting
The gas collection hole of gas, the other end connect the inlet end of vacuum chamber 7 by switch valve IV, and the gas that gas collection hole is collected is via gas gathering mask
Into vacuum chamber 7.
Blowing occupies important role with gas collection unit 12 in whole device, and end schematic diagram where gas gathering mask gas collection hole is such as
Shown in Fig. 2.It is the capital equipment of ambient atmos sucking, to guarantee to detect enough areas under minimal path, blowing with
The collection port of gas collection unit 12 is answered as big as possible.But if collecting, port is larger, and space becomes larger in gas gathering mask, is imitated by single-pipeline air-breathing
Rate will reduce, and therefore, the present embodiment carries out gas collection using the gas collection hole of array structure formal distribution, by gas gathering mask
Multiple spot different location (i.e. gas collection hole array) while air-breathing accelerate air-breathing speed, in the biggish situation of area of hunting leak, it is ensured that
In gas gathering mask vacuum chamber can be rapidly entered by air inlet pipeline at every bit.And it, can be in the case where load-carrying allows
Increase the vacuum chamber connecting with gas collection hole and mass spectroscopy device, the air-tightness suitable for large container is quickly detected and positioned, full
Sufficient airship envelope defects detection requirement.
Another function of blowing and gas collection unit 12 is to be blown and dilute background gas, it is ensured that the helium that dirigible internal leakage goes out
Gas occupies certain concentration ratio in outside air, helium content anomaly could be accurately detected by concentration difference in this way, in gas gathering mask
Gas collection hole be equipped with injection hole 13 on the whole, injection hole 13 is by being provided with the high pressure gas source capsule of solenoid valve II and pressure reducing valve V
Road 14 is connect with high-pressure air source, and the gas stored in the high-pressure air source is nitrogen or pure air.Pass through Gas injection pipeline
System realizes blowing and dilution background gas, and Gas injection pipe-line system is mainly by switch valve III, solenoid valve II, V and of pressure reducing valve
High-pressure air source (the present embodiment uses Nitrogen source gases) composition.Detection background is realized by external high-pressure air source in Gas injection pipeline
In gas concentration to be detected dilution and blow down function, wherein the effect of pressure reducing valve V is to reduce the pressure of high-pressure air source, high pressure gas
Source generally in 15MPa, practical blowing, needs to be depressurized within 2MPa.In order to guarantee that the individually controllable property of pipeline, design are opened
Valve III is closed, the gas collection pipeline at air inlet is individually controlled, is made jointly with switch valve III, switch valve IV and solenoid valve II
With the opening and closing of control gas detection pipeline.
The outlet side of vacuum chamber 7 connects vacuum pump 6 by solenoid valve I, and intermediate pump 6 is used for before gas collection, right
Vacuum chamber 7 is vacuumized；The outlet side of vacuum chamber 7 connects circulating fan 8 by switch valve II, and circulating fan 8 passes through setting
There is the piping connection mass spectroscopy device 9 of needle-valve, exhaust outlet is equipped on the pipeline；As shown in figure 3, by mainly by switch valve II,
The Leakage inspection pipeline that circulating fan 8, exhaust outlet, needle-valve and mass spectroscopy device 9 form detects gas leakage.Circulation
The negative pressure absorbing that blower 8 generates enters the air in vacuum chamber through gas gathering mask, is carried out using mass spectroscopy device 9 to the gas being collected into
Helium constituent analysis and the concentration for detecting helium, to judge whether to leak.If concentrations of helium is higher than this in detected gas
Concentrations of helium in spirit body, then the airtight container surface for detecting position leak.The increased circulating fan of line upstream
8, gas flow rates and leak detection efficiency are improved, the exhaust outlet between circulating fan 8 and mass spectroscopy device 9 is for being quickly discharged inspection
Gas in test tube road, when carrying out background gas acquisition, if the concentrations of helium in signal piping is higher, if with this concentrations of helium
Gas as background gas, then will lead to mass spectroscopy device 9 can not detect gas leakage situation, can open exhaust at this time
Mouthful, the exhaust outlet that gas in pipeline passes through quickly is discharged, while can use Gas injection and the progress background of gas collection unit 12
Gas collecting；If necessary to very low background concentration, realizes highly sensitive detection, can control high-pressure air source and pass through injection hole
13 blow to face where gas collection hole, the gas in gas detection pipeline are updated using nitrogen or pure air, to reduce detection
Concentrations of helium in pipeline, the sampling of mass spectroscopy device 9 obtain the background gas of low concentrations of helium.
The control to other devices in detection components is realized in opening and closing in the present embodiment by control valve；
For positioning component of creeping for controlling detection components creeping and positioning on airship envelope surface, positioning component of creeping can
Using equipment such as climbing robot, equipment of ascending a height or auxiliary moulds.
The detection device of the present embodiment realizes that negative-pressure adsorption of the flexible sucker on covering (can also adopt by vacuum pump air-breathing
Magnetic suck is carried out with interior external device), gas is collected by blowing and gas collection unit, then using in mass spectroscopy device signal piping
Concentrations of helium variation is realized to functions such as quick detection, positioning, assessment and the records of covering gas leak position.Easy to operate,
Detection accuracy is high, reflecting time is fast, can quantify to detect slip, and the air-tightness suitable for large-size pliable structure container quickly detects
With positioning, the requirement of airship envelope defects detection can be met.
In actual use, the quantity of crawler component carries mass spectroscopy device quantity or gas gathering mask can increase,
Quantity by increasing detection components further increases detection efficiency and speed.
Embodiment 2: the present embodiment proposes a kind of gas leak detection apparatus based on absorption climbing robot, the inspection
It is same as Example 1 to survey component.Realize that airship envelope defect detects automatically using absorption robot, the absorption robot has
Adsorption function, walking function and gas collection identification function, meet the following requirements:
(1) function is moved freely, it being capable of moving freely on airship envelope surface.
(2) gas collection function, robot sucker have the function of negative-pressure adsorption, while it is as skin-surface gas collection
Device combines with non-contacting blowing with gas collection unit and realizes that the fast gas of portable mass spectroscopy device is collected.
(3) curvature adaptability function since there are different Curvature varyings on dirigible surface, and protrudes structural member obstacle, because
This ability for requiring robot that can have certain adaptation operating environment.
(4) maximum area of detection is realized under minimal path as far as possible, realizes quickly detection, and prevent missing inspection.
The overall structure of gas leak detection apparatus of the present embodiment based on absorption climbing robot is as shown in Figure 1, absorption
Climbing robot include sucker 1, guide rod 2, two-way cylinder 3, joint adjustment driving motor 4, support arm curve driving motor 5 and
Support arm 10；Wherein, sucker 1 is for being adsorbed on detected airtight container surface, and quantity is at least 2, for realizing to detection
The positioning of device, while the gas on airtight container surface can also be collected, sucker 1 is fixed on the tailpiece of the piston rod of two-way cylinder 3
Portion controls sucker 1 under the action of two-way cylinder 3 and vertically leaves or contact detected airtight container surface, and guide rod 2, which rises, leads
To effect；Joint adjustment driving motor 4 is used to adjust the posture of sucker 1, pastes sucker 1 and detected airtight container surface
It closes, support arm curves rotation and extension and contraction control sucker 1 of the driving motor 5 by control support arm 10 in detected airtight container
Surface walking.
As shown in figure 3, sucker is by being provided with the piping connection of I~pressure reducing valve of pressure reducing valve IV and switch valve I to vacuum chamber 7
Inlet end, the corresponding pressure reducing valve of each sucker；The outlet side of vacuum chamber 7 connects vacuum pump 6 by solenoid valve I, passes through vacuum
The positioning of sucker negative-pressure adsorption is realized in 6 pumping of pump, realizes loosening for corresponding sucker by opening corresponding pressure reducing valve.Sucker passes through negative pressure
Absorption, which is realized, to be positioned and is collected gas by sucker mouth, under the effect of vacuum pump 6, utilizes sucker 1 and blowing and gas collection list
Member 12 completes the collection of ambient atmos by gas collection pipeline 15, and the gas of collection enters sample areas i.e. vacuum chamber 7, portable
Formula mass spectroscopy device 9 completes the sampling and detection of gas under the effect of circulating fan 8.
When detection device works, absorption climbing robot, which carries, to be passed portable mass spectroscopy device and carries out defect inspection, using showing
Track gas non-destructive testing technology detects the gas leakage of inflation airship.Robot uses polypody sucker structure, and every ambulacra 1 is pacified
Equipped with the two-way cylinder 3 with guide rod 2, sucker 1 is fixed on cylinder piston boom end, controls the flexible of sucker by two-way cylinder 3.
When equipment is mobile, it is first released from the negative-pressure adsorption of a wherein ambulacra 1, sucker 1 loosens, under the effect of two-way cylinder 3, sucker 1
Detected airtight container surface is vertically left, driving motor 4 is adjusted by joint, 1 posture of sucker is adjusted, propped up simultaneously
Brace 10 curves control sucker 1 stretching, extension under driving motor 5 acts in support arm and reaches setting position, and sucker 1 reaches setting position
When realized and position by negative-pressure adsorption, remaining ambulacra 1 alternately loosens and moves, and realizes climbing on tested airtight container surface
Row.
The present embodiment is provided one kind and is climbed based on absorption by integrated transformation gas collector and robot move mode
The gas leak detection apparatus of row robot realizes rapidly and efficiently testing requirements.Wherein, absorption climbing robot suction type is adopted
It is adsorbed with negative pressure of vacuum, since airship envelope surface has certain radius of curvature difference, absorption uses polypody multi-sucker
Formula structure guarantees the stability of adsorption process, while can adapt to the variation of different parts radius of curvature.In addition, dirigible
Skin material is MULTILAYER COMPOSITE flexible material, and rigid structure is easy to generate damage to covering, and therefore, sucker is used using flexible material
Matter.
Gas leak detection apparatus based on absorption climbing robot is using steps are as follows:
Step 1, air is filled inside dirigible utricule to conformal (0~100Pa), is then charged with helium to 200~1000Pa pressure
Power (determines) according to utricule volume size and the strength of materials；
Step 2, when initial, the gas leak detection apparatus, pressure reducing valve is in an open state, other all valves are closure
Gas leak detection apparatus is placed in skin-surface by state；
Step 3, it is closed the suctorial pressure reducing valve of institute and turns on the switch valve I, open the solenoid valve I of the detection device, benefit
Vacuum chamber 7 is vacuumized with vacuum pump 6, so that sucker suction is in airship envelope, and completes sucker to the receipts of skin-surface gas
Collection；
Step 4, valve IV is turned on the switch, blowing starts to collect the gas on detected airtight container surface with gas collection unit 12
Body；
Valve I and solenoid valve I are turned off the switch, valve II, the pressure difference that mass spectroscopy device 9 is generated using circulating fan 8 are turned on the switch
Concentrations of helium detection is carried out to sample gas, and records concentration value；
The background gas concentrations sampled such as mass spectroscopy device 9 are higher than testing requirements, then open exhaust outlet, after being vented setting time
Close exhaust outlet；
If the contaminated i.e. background gas of detection zone background is abnormal, then valve IV is turned off the switch, solenoid valve II is opened, utilizes height
The gas of pressurized air source storage blows down background gas, after the completion of blowing, turns on the switch valve IV, closes solenoid valve II；
Step 5, after completing Concentration Testing, the pressure reducing valve of sucker is alternately opened, discharges sucker and movement, the detection device
It is moved to the next position, repeats step 2-5, until completing the detection of all positions.
Experimental verification: using 4 meters of diameter of spherical dirigible, invention detection method is verified.Verification result shows:
It is hunted leak using soap bubble method, is that can to detect the practical minimum leak rate of leak hole in 3000Pa be about 1 × 10 in the blowing pressure- 2Pa·m3/ s to 1 × 10-3Pa·m3/s；It is hunted leak using tracer gas technique, the practical minimum leak rate that can detect leak hole is about 1
×10-4Pa·m3/ s to 1 × 10-5Pa·m3/s.Illustrate it is engineered after tracer gas technique can be higher than soap bubble method detection accuracy
One to two magnitudes can leak dirigible gas and carry out quantitative detection and positioning.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (9)
1. a kind of gas leak detection apparatus, which is characterized in that including detection components and positioning component of creeping；
The detection components are used to detect the gas leakage of airtight container, including gas gathering mask, vacuum pump (6), vacuum
Room (7), circulating fan (8) and mass spectroscopy device (9)；Wherein, gas gathering mask one end is provided with the gas collection hole for collecting gas, separately
One end connects the inlet end of vacuum chamber (7), and the gas that gas collection hole is collected enters vacuum chamber (7) via gas gathering mask；Vacuum pump (6) with
Vacuum chamber (7) connection, for carrying out vacuumize process to vacuum chamber (7) before detection；Circulating fan (8) connects vacuum chamber (7)
With mass spectroscopy device (9), the gas in vacuum chamber (7) is input to mass spectroscopy device (9)；The mass spectroscopy device (9) is defeated for detecting
Enter the gas componant and gas concentration of gas, to judge whether the gas in airtight container is revealed；
Positioning component of creeping is for controlling detection components in airtight container surface creep and positioning；
Wherein, the positioning component of creeping realizes positioning by sucker negative-pressure adsorption, and vacuum chamber (7) is connect with sucker, passes through suction
The collection of disk progress airtight container surface gas.
2. a kind of gas leak detection apparatus as described in claim 1, which is characterized in that the gas collection hole uses array structure
Formal distribution.
3. a kind of gas leak detection apparatus as described in claim 1, which is characterized in that the gas collection hole institute of gas gathering mask is on the whole
It is additionally provided with injection hole (13), injection hole (13) is connect by high-pressure air source pipeline (14) with high-pressure air source, in the high-pressure air source
The gas of storage is nitrogen or pure air.
4. a kind of gas leak detection apparatus as described in claim 1, the positioning component of creeping passes through sucker negative-pressure adsorption
Or interior external device magnetic suck realizes positioning.
5. a kind of gas leak detection apparatus as described in claim 1, which is characterized in that
The positioning component of creeping includes more than two suckers, and each sucker is connected after connecting respective pressure reducing valve by switch valve I
The outlet side end of the inlet end of vacuum chamber (7), vacuum chamber (7) connects vacuum pump (6) by solenoid valve I, is connected by switch valve II
It connects circulating fan (8), is successively arranged exhaust outlet and needle-valve between circulating fan (8) and mass spectroscopy device (9)；
Gas gathering mask collects the inlet end that the opposite one end of port connects by switch valve IV vacuum chamber (7) with it, and injection hole (13) is even
It connects high-pressure air source pipeline (14), high-pressure air source pipeline (14) is connect by solenoid valve II with high-pressure air source.
6. a kind of gas leak detection apparatus as described in claim 1, which is characterized in that the sucker uses flexible material.
7. a kind of gas leak detection apparatus as described in claim 1-5 any one, which is characterized in that the positioning of creeping
Component is absorption climbing robot, and the absorption climbing robot includes sucker (1), two-way cylinder (3), joint adjustment driving electricity
Machine (4), support arm curve driving motor (5) and support arm (10)；
Wherein, sucker (1) is fixed on the piston rod end of two-way cylinder (3), controls sucker under the action of two-way cylinder (3)
(1) it vertically leaves or contacts and be detected airtight container surface；Joint adjustment driving motor (4) is used to adjust the appearance of sucker (1)
State is bonded sucker (1) with detected airtight container surface, and support arm curves driving motor (5) and passes through control support arm
(10) rotation and extension and contraction control sucker (1) is walked on detected airtight container surface.
8. a kind of gas leak detection apparatus as claimed in claim 7, which is characterized in that the absorption climbing robot also wraps
Guide rod (2) are included, sucker (1) is controlled under the action of two-way cylinder (3) and vertically leaves or contact detected airtight container surface
When, guide rod (2) play the guiding role to the movement of sucker.
9. a kind of airship envelope defect gas leak detection method, which is characterized in that using a kind of gas as described in claim 1
Body leak detecting device, includes the following steps:
Step 1, air is filled inside dirigible utricule to conformal, is then charged with helium；
Step 2, when initial, gas leak detection apparatus is placed in skin-surface；
Step 3, vacuum chamber (7) is vacuumized using vacuum pump (6), so that sucker suction is in airship envelope, and completes sucker pair
The collection of skin-surface gas；
Step 4, the gas for being detected airtight container surface is collected by gas gathering mask；
The pressure difference that mass spectroscopy device (9) is generated using circulating fan (8) carries out constituent analysis and Concentration Testing to input gas, and
It is compared with background gas, judges whether the gas in airtight container is revealed；
If detection zone background gas is contaminated, then background gas is blown down using the gas that high-pressure air source stores；
Step 5, after completing Concentration Testing, sucker and movement are alternately discharged, the detection device is moved to the next position, and repetition is held
Row step 3-5, until completing the detection of all positions.
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