CN106768688B - Leakage of seal chamber detection method based on Self-expanding gas - Google Patents
Leakage of seal chamber detection method based on Self-expanding gas Download PDFInfo
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- CN106768688B CN106768688B CN201611019824.9A CN201611019824A CN106768688B CN 106768688 B CN106768688 B CN 106768688B CN 201611019824 A CN201611019824 A CN 201611019824A CN 106768688 B CN106768688 B CN 106768688B
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- gas
- seal cavity
- alcohol
- leakage
- test agent
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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
Abstract
The present invention provides a kind of leakage of seal chamber detection method based on Self-expanding gas, belongs to leak detection technology field.This method specifically: before seal cavity assembly, placing heat inside it can produce solid matter volatile under expanding gas or room temperature as reagent.Then it refills and prepares to form seal cavity, to the appropriate heating temperature of seal cavity when leak detection (for can be without heating using reagent volatile under room temperature), bubbing in solid reagent has the trend overflowed outward since the micro-pressure that gas generates is poor.When seal cavity is there are when leakage problem, this gas can be detected outside seal cavity.Cavity leakage detection is sealed using this method, can effectively realize the leak detection to compact-sized or any complicated seal cavity.
Description
Technical field
The present invention relates to a kind of leak testing methods, and in particular to a kind of leak detection side based on Self-expanding gas
Method belongs to leak detection technology field.
Background technique
In order to guarantee sealing effect in important industrial production, seal request, rule often are proposed in some compact-sized places
Surely leak-testing must be carried out.Such as with the continuous improvement of aircraft tactics index, it is desirable that flying speed faster, range it is farther,
Aircraft and engine integration design degree are high.In order to improve range, effective method is to increase volume of fuel tank, fuel tank space
Increase causes engine space to reduce, and chamber length shortens, and topology layout is more compact.This class formation is often due to structure and sky
Between limit, common leak detection sensor and instrument deeply internal can not be tested；And since inflation, filling liquid etc. are difficult to realize,
Carry out the traditional detection methods such as leak detection by bubbles, pressure difference method, audition method can not effectively.
Summary of the invention
In view of this, the present invention provides a kind of leakage of seal chamber detection method based on Self-expanding gas, this method
Accessibility is good, simple and effective, can be realized the leak detection to labyrinth enclosure space, and without complicated test equipment.
The leakage of seal chamber detection method based on Self-expanding gas, specifically: seal cavity assembly is completed
Before, test agent is placed inside it；The test agent is that heat can produce solid-state volatile under expanding gas or room temperature
Substance；When leak detection, the gas componant with the presence of test agent is detected whether outside seal cavity, shows seal chamber if having
Body leaks, and otherwise shows that seal cavity does not leak.
For can produce seal cavity of the expanding gas as test agent using heat, before leak detection, will first seal
Cavity is heated to temperature needed for test agent expansion generates gas.
In the presence of detecting the gas componant of test agent outside seal cavity, according to detected test agent
The concentration of gas componant judges leakage of seal chamber degree.
As a kind of preferred embodiment of the invention, the test agent is dehydrated alcohol；Before seal cavity assembly is completed,
The inner surface of seal cavity smears the paste reagent being mixed to form by dehydrated alcohol and adhesive.
When leak detection, the alcohol gas of volatilization is detected whether outside seal cavity using alcohol detecting device.It is described
Alcohol detecting device includes: that gas intake structure, alcohol detection sensor, signal amplification circuit and signal show structure；It is described
The gas that gas intake structure is used to will test position is sent to alcohol detection sensor；The alcohol detection sensor is for examining
Whether have alcoholic content, and export corresponding voltage signal if surveying in the gas for transmitting and；The signal amplification circuit is by alcohol
It is sent to signal after the voltage signal amplification of detection sensor and shows structure, the signal shows voltage letter of the structure according to calibration
Relationship number between alcohol concentration shows detected alcohol concentration value.
The utility model has the advantages that
(1) this method is simple and effective, only need to be before seal cavity formation, and placing heat inside it can produce expansion
Solid matter volatile under gas or room temperature is generated as reagent, can realize to the leak detection of seal cavity, be not necessarily to
Complicated test equipment, so as to effectively realize the leak detection to compact-sized seal cavity.
(2) select alcohol as reagent, it is safe and reliable in use, it is low to environmental toxicity, corrosivity is small, it will not be to tested
Seal cavity constitutes damage.
Detailed description of the invention
Fig. 1 is the flow diagram of the leakage detection method；
Fig. 2 is the circuit diagram of alcohol gas detection sensor.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The key of this method is that selecting one kind to have heat can produce volatile characteristic under expanding gas or room temperature
Solid matter as reagent, be placed in needed for detect seal cavity in.Its testing principle are as follows: suitable to seal cavity when leak detection
Work as heating temperature, bubbing in reagent has the trend overflowed outward since the micro-pressure that gas generates is poor；Work as seal chamber
Body will detect the presence of this gas componant there are when leakage problem outside seal cavity.Pass through detection gas leakage
Concentration can also be achieved and carry out quantitative analysis to leakage.
Alcohol and ammonium hydrogen carbonate are provided with above-mentioned characteristic, but ammonia has corrosivity, and alcohol irritation is small, to environment without
Evil can vapor away residual gas after test terminates a period of time, and alignment type works without influence.Therefore, the present embodiment provides
A kind of leakage of seal chamber detection method based on alcohol concentration analysis, using dehydrated alcohol plus a small amount of adhesive as reagent,
For the feasibility for detecting this method, which is used in air seal simulation architecture, to realize to air seal simulation architecture
Leak detection.
The air seal simulation architecture includes inner cylinder and shell, wherein the both ends of periphery respectively install one outer tube
A rubber seal, then inside housings by inner cylinder suit, rubber seal and shell are interference fitted, and thus two rubber are close
It is to seal cavity configuration that inner cylinder and shell, which are formed by annular space, between seal.
The detailed process of this method on shell outer circumference surface by electric spark etching mode as shown in Figure 1, first distinguished
Carve two notches (crackle) of length and width, deep respectively 10mm, 0.2mm, 0.5mm and 10mm, 0.2mm, 1mm.Then by industrial nothing
Water-ethanol and a little paste are tuned into reagent, are uniformly applied on the inner cylinder outer circumference surface between two rubber seal, then will
Inner cylinder and shell are coupled, it is ensured that on the outer circumference surface of shell of two notches between two rubber seal.
With the reagent that splashes down in air-heater drying assembling process, and be placed in ventilation 12 hours or more, it is ensured that alcohol liquid only exists
In seal chamber.The inner cylinder assembled and shell are placed on bracket.
It, can be without adding to the air seal simulation architecture since industry anhydrous ethanol has volatile characteristic under room temperature
Heat.The principle of alcohol detecting device are as follows: when, there are when alcoholic content, the conductivity of sensor is with environment in sensor local environment
The increase of middle alcohol concentration and increase, conductivity is converted to by voltage corresponding with the gas concentration by Conditioning Circuits of Sensor
Signal.And can further demarcate, voltage signal is converted into corresponding concentration value, and export display, with reach detection alcohol at
Divide the purpose of concentration.
Thus the alcohol detecting device include gas intake structure, alcohol detection sensor, signal amplification circuit and
Signal shows four part of structure.Wherein gas intake structure is hose+getter device, and hose is used to reach near measured position,
Path entrance is arranged in hose front end, is accurately positioned for fault point；Getter device is small air pump, using principle of negative pressure by failure
The alcoholic content of point is drawn at alcohol detection sensor.At alcohol detection sensor for its alcoholic content in the environment inspection
It surveys, alcohol detection sensor uses tin oxide based semiconductor device, and principle is simple, easy to use.Alcohol detection sensor is because of wine
The useful signal amplitude very little that smart ingredient generates, need to be effective by the voltage signal of alcohol detection sensor by signal amplification circuit
Amplification.Signal shows structure for receiving through the amplified voltage signal of signal amplification circuit, and the voltage signal according to calibration
Relationship between alcohol concentration shows detected alcohol concentration value.Its principle is as shown in Figure 2.
Alcohol detecting device is connected before detection, after alcohol detecting device reaches steady-working state, it may appear that 0-0.03V
Fluctuation.Due to that cannot accomplish to be absolutely sealed, when alcohol detecting device is close to seal chamber, has the signal no more than 0.3V and produce
It is raw.The signal alcohol detecting device apart from seal chamber 4cm or more apart from when will disappear, therefore have substantially no effect on detection knot
Fruit.
When formal detection, by the gas intake structure in alcohol detecting device respectively radially, axially adjacent to notch, and needle
Two various sizes of crackles are detected respectively, if leakage of seal chamber, alcohol steam is had and is leaked from indentation, there.It is examined
It is as shown in the table to survey result:
Crackle A (length and width, deep respectively 10mm, 0.2mm, 0.5mm):
By the gas intake structure in alcohol detecting device radially close to crackle A, detected voltage and distance
Relationship is as shown in table 1:
Table 1: along crackle A radial direction test result
| Distance/cm | 18 | 15 | 12 | 9 | 6 | 3 | 0.5 |
| Voltage/V | 0 | 0.1 | 0.4 | 1.0 | 1.6 | 2.0 | 3.1 |
By the gas intake structure in alcohol detecting device axially move closer to crackle A, detected voltage and distance
Relationship is as shown in table 2:
Table 2: crackle A axial direction test result
| Distance/cm | 20 | 18 | 12 | 9 | 6 | 3 | 0.5 |
| Voltage/V | 0 | 0.1 | 0.5 | 1.0 | 1.4 | 2.3 | 3.1 |
Crackle B (length and width, deep respectively 10mm, 0.2mm, 1mm):
By the gas intake structure in alcohol detecting device radially close to crackle B, detected voltage and distance
Relationship is as shown in table 3:
Table 3: along crackle B radial direction test result
| Distance/cm | 18 | 15 | 12 | 9 | 6 | 3 | 0.5 |
| Voltage/V | 0 | 0.1 | 0.3 | 0.8 | 1.4 | 1.9 | 2.8 |
By the gas intake structure in alcohol detecting device axially move closer to crackle B, detected voltage and distance
Relationship is as shown in table 4:
Table 4: crackle B radial direction test result
| Distance/cm | 20 | 18 | 12 | 9 | 6 | 3 | 0.5 |
| Voltage/V | 0 | 0.1 | 0.4 | 1.0 | 1.2 | 2.1 | 2.8 |
By the above testing result: the air seal simulation architecture has leakage at crackle A and crackle B, and splits
It is leaked at line A even more serious.
Leakage of seal chamber degree is judged according to detected alcohol gas concentration.
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 (2)
1. the leakage of seal chamber detection method based on Self-expanding gas, which is characterized in that before seal cavity assembly is completed,
Its internal placement test agent；The test agent is that heat can produce solid matter volatile under expanding gas or room temperature；
When leak detection, the gas componant with the presence of test agent is detected whether outside seal cavity, shows that seal cavity goes out if having
It now leaks, otherwise shows that seal cavity does not leak；
For can produce seal cavity of the expanding gas as test agent using heat, before leak detection, first by seal cavity
It is heated to temperature needed for test agent expansion generates gas；
The test agent is dehydrated alcohol；Before seal cavity assembly is completed, smear in the inner surface of seal cavity by anhydrous second
The paste reagent that pure and mild adhesive is mixed to form；
When leak detection, the alcohol gas of volatilization is detected whether outside seal cavity using alcohol detecting device；
The alcohol detecting device includes: gas intake structure, alcohol detection sensor, signal amplification circuit and signal display knot
Structure；The gas that the gas intake structure is used to will test position is sent to alcohol detection sensor；The alcohol detection sensing
Device is used to detect in the gas for transmitting and whether have alcoholic content, and exports corresponding voltage signal；The signal amplification electricity
Road is sent to signal and shows structure after amplifying the voltage signal of alcohol detection sensor, the signal shows structure according to calibration
Voltage signal and alcohol concentration between relationship, show detected alcohol concentration value；
The gas intake structure includes hose and getter device, and path is arranged for reaching measured position, hose front end in hose
Entrance is accurately positioned for fault point；Getter device is small air pump, is drawn to the alcoholic content of fault point using principle of negative pressure
At alcohol detection sensor.
2. as described in claim 1 based on the leakage of seal chamber detection method of Self-expanding gas, which is characterized in that when
In the presence of the gas componant for detecting test agent outside seal cavity, gas componant according to detected test agent it is dense
Degree judges leakage of seal chamber degree.
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| CN109900431A (en) * | 2018-11-13 | 2019-06-18 | 阿里巴巴集团控股有限公司 | The detection method and device of container state, electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151514A (en) * | 2005-02-28 | 2008-03-26 | 高级技术材料公司 | Apparatus and process for leak-testing and qualification of fluid dispensing vessels |
| CN102023073A (en) * | 2010-10-21 | 2011-04-20 | 徐州建筑职业技术学院 | Method for detecting wall leakage |
| CN102047090A (en) * | 2008-04-03 | 2011-05-04 | 阿尔卡特朗讯公司 | Method and device for testing a container for leaks |
| CN103148990A (en) * | 2013-02-04 | 2013-06-12 | 百顺松涛（天津）动力电池科技发展有限公司 | Lithium ion battery gas tightness detecting method |
| CN103154689A (en) * | 2010-09-03 | 2013-06-12 | 英福康有限责任公司 | Leak detector |
| CN103558228A (en) * | 2013-11-14 | 2014-02-05 | 保定天威集团有限公司 | Leakage detecting agent for detecting leakage of weld joint in welding process and detection method |
| CN104299371A (en) * | 2014-11-10 | 2015-01-21 | 周芸 | Combustible gas leakage audible and visual alarm |
| CN105092172A (en) * | 2015-08-25 | 2015-11-25 | 重庆瑞力比燃气设备有限责任公司 | Sealing device for gas pipeline weld detection |
| CN105987796A (en) * | 2015-02-12 | 2016-10-05 | 广州市和晋自动化控制技术有限公司 | Method and device for detecting gas concentration |
-
2016
- 2016-11-18 CN CN201611019824.9A patent/CN106768688B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151514A (en) * | 2005-02-28 | 2008-03-26 | 高级技术材料公司 | Apparatus and process for leak-testing and qualification of fluid dispensing vessels |
| CN102047090A (en) * | 2008-04-03 | 2011-05-04 | 阿尔卡特朗讯公司 | Method and device for testing a container for leaks |
| CN103154689A (en) * | 2010-09-03 | 2013-06-12 | 英福康有限责任公司 | Leak detector |
| CN102023073A (en) * | 2010-10-21 | 2011-04-20 | 徐州建筑职业技术学院 | Method for detecting wall leakage |
| CN103148990A (en) * | 2013-02-04 | 2013-06-12 | 百顺松涛（天津）动力电池科技发展有限公司 | Lithium ion battery gas tightness detecting method |
| CN103558228A (en) * | 2013-11-14 | 2014-02-05 | 保定天威集团有限公司 | Leakage detecting agent for detecting leakage of weld joint in welding process and detection method |
| CN104299371A (en) * | 2014-11-10 | 2015-01-21 | 周芸 | Combustible gas leakage audible and visual alarm |
| CN105987796A (en) * | 2015-02-12 | 2016-10-05 | 广州市和晋自动化控制技术有限公司 | Method and device for detecting gas concentration |
| CN105092172A (en) * | 2015-08-25 | 2015-11-25 | 重庆瑞力比燃气设备有限责任公司 | Sealing device for gas pipeline weld detection |
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