CN108507726A - The mechanism of detectable auto parts machinery air-tightness - Google Patents
The mechanism of detectable auto parts machinery air-tightness Download PDFInfo
- Publication number
- CN108507726A CN108507726A CN201810167249.XA CN201810167249A CN108507726A CN 108507726 A CN108507726 A CN 108507726A CN 201810167249 A CN201810167249 A CN 201810167249A CN 108507726 A CN108507726 A CN 108507726A
- Authority
- CN
- China
- Prior art keywords
- air
- babinet
- pipeline
- solenoid valve
- vacuum
- 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.)
- Pending
Links
Classifications
-
- 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
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
-
- 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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of mechanisms of detectable auto parts machinery air-tightness,Including babinet and pipeline,It is useful for placing the cavity of part to be measured in the babinet,The both ends of the pipeline are connected with part to be measured respectively,It is connected with solenoid valve in turn on the pipeline,Air heater,The gentle pressure inductor of air compressor,The solenoid valve,Air heater,The gentle pressure inductor of air compressor is placed in outside babinet and works independently from each other,It is additionally provided with sink and vacuum air pump outside the babinet,It is connected by pipeline between the sink and babinet,Pipeline between the sink and babinet is vacuum tracheae,It is provided with Non-return air valve and three-way solenoid valve on the vacuum tracheae,The three-way solenoid valve is connected with the vacuum air pump,Patent of the present invention solves the problems, such as that the prior art can only detect at normal temperatures and pressures,Overcome the problems, such as yielding,Use detection method twice,Reach better detection result.
Description
Technical field
The present invention discloses a kind of mechanism of detectable auto parts machinery air-tightness, is related to auto parts machinery manufacture technical field.
Background technology
Automobile comes into huge numbers of families as the daily vehicles, in the numerous accessories for constituting automobile, to one
The requirement of distribution member is that need to have good sealing performance, and the bad auto parts machinery of leakproofness can influence the normal operation of automobile,
When serious, or even cause traffic accidents, it is therefore, particularly important to the air-leakage test of this kind of auto parts machinery.
In the prior art to the air-leakage test generally use two ways of auto parts machinery, one is filled using high pressure gas
Enter in auto parts machinery, the auto parts machinery is detected with the presence or absence of gap by observing air pressure inside variation；Another kind is will to be filled with height
The auto parts machinery of body of calming the anger is submerged into water, whether is generated bubble in water by observing and is detected the auto parts machinery with the presence or absence of letting out
Dew.Above two mode does not all account for the true use environment of auto parts machinery, is only tested at normal temperatures and pressures, suddenly
The case where auto parts machinery is heated or is cooled in use is omited.
Above-mentioned detection mode is all under normal pressure detected auto parts machinery, exists inaccurate to subtle gap leakage detection
True problem, mode used by heating are deformed and are asked there is also easily leading to auto parts machinery uneven heating and compressing uneven
Topic.
Invention content
The mechanism of detectable auto parts machinery air-tightness disclosed by the invention, which solves when simulation true environment is detected, to be held
Easily lead to uneven heating, unbalance stress and the problem of be easily deformed.Reach while having been detected using two ways, has also solved mould
Quasi- true environment is easy to cause uneven heating, is easily deformed when being detected the problem of also solves and only detects under normal pressure not
Accurate problem.
In order to achieve the above object, the base case that the present invention uses for：The mechanism of detectable auto parts machinery air-tightness, packet
Babinet and pipeline are included, the babinet offers opening, and the box opening is equipped with can cover the lid for running mouth jointly completely, described
The cavity for placing part to be measured is equipped in babinet, the both ends of the pipeline are connected with part to be measured respectively, gas in the pipeline
Body flow direction is connected with the gentle pressure inductor of solenoid valve, air heater, air compressor, the solenoid valve, air in turn
The gentle pressure inductor of heater, air compressor is placed in outside babinet and works independently from each other, and is additionally provided with outside the babinet
Sink and vacuum air pump are connected between the sink and babinet by pipeline, and the pipeline between the sink and babinet is true
Air hose is provided with Non-return air valve and three-way solenoid valve, the three-way solenoid valve and the vacuum suction on the vacuum tracheae
Machine is connected.
The basic functional principle of the present invention is：When needing to carry out room temperature detection, air heater does not work, by room temperature sky
Pneumatic transmission enters inside part to be measured, and part to be measured is room temperature at this time, or the air after heating is passed through air pressure using air heater
Contracting machine is filled with inside part to be measured, and hot-air is recycled inside part to be measured, and entire part to be measured is all heated, this is utilized
A cold heat, the principle expanded with heat and contract with cold can simulate the true environment of part to be measured；When box house also has gas, to be measured
Part is filled with high pressure gas, if part to be measured has the case where leakage, the gas in babinet will gradually increase, and again in babinet
Certain pressure is formed, the air in babinet enters sink by vacuum tracheae and forms bubble in sink；Vacuum air pump
By the air extraction in babinet so that form vacuum in babinet, and high pressure is filled with inside the part to be measured placed in babinet
Gas, even if part to be measured has subtle gap, under the effect of huge pressure difference, internal high pressure gas will also leak,
To make up the environment of vacuum in babinet, therefore, the pressure value inside part to be measured also just changes, and successively observing has in sink
The variation of bubble-free and pressure inductor can accurately obtain part to be measured with the presence or absence of leakage.
The beneficial effects of the present invention are：Compared with prior art, the present invention heats part mode to be measured using air and simulates
The cold and hot true environment of part to be measured, enables to part to be measured to be uniformly heated when detecting；With the prior art in condition of normal pressure
Lower detection is compared, and part to be measured is placed under vacuum environment and is detected by the present invention, can more accurately detect subtle gap
Leakage；With the prior art only there are one compared with observation index, the present invention uses bubble two kinds of watchers of gentle pressure inductor simultaneously
Formula so that detection is more acurrate；Compared with prior art, part to be measured is being placed in vacuum environment by the present invention, and is filled into part to be measured
Such as pressed gas, the anti-pressure ability of the part to be measured can also be detected when detecting air-tightness.
Further, the pipeline is metal hose, and metal hose can be bent, and metal hose is placed in energy under vacuum environment
Enough sustain the pressure inside metal hose.
Further, the air inlet and gas outlet of the pipeline and part to be measured are all to be tightly connected, and sealed connection can ensure
Junction is not revealed when being detected.
Further, the Non-return air valve is positioned close to sink side, and setting in this way can ensure that box house is vacuum
When condition, water cannot blow back into babinet.
Further, the solenoid valve, three-way solenoid valve, air heater, air compressor and vacuum air pump are controlled
Circuit control processed is controlled by unified control circuit, it is possible to reduce artificial frequent operation mitigates artificial burden.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Specific implementation mode
The present invention is described in further details below by specific embodiment：
The label for including in description of the invention attached drawing has：It is babinet 100, fuel tank 101, air inlet pipe 102, escape pipe 103, true
Air hose 104, opening 105, lid 106, air inlet 107, gas outlet 108, expansion rubber circle 109, sink 110, air pressure inductor
111, Non-return air valve 112, air pressurized machine 120, air heater 121, solenoid valve 122, vacuum air pump 123, three-dimensional electromagnetism
Valve 130, rack 140, control circuit 141, metal hose 142.
As shown in Figure 1, the mechanism of detectable auto parts machinery air-tightness, including babinet 100 and pipeline, the babinet 100 are opened
Equipped with opening 105, the lid 106 for running mouth 105 jointly, the babinet 100 can be covered completely by being equipped at the opening of the babinet 100 105
The interior cavity being equipped with for placing part to be measured, the both ends of the pipeline are connected with part to be measured respectively, the gas in pipelines stream
Dynamic direction is connected with the gentle pressure inductor 111 of solenoid valve 122, air heater 121, air compressor, the solenoid valve in turn
122, the gentle pressure inductor of air heater 121, air compressor 111 is placed in 100 outside of babinet and works independently from each other, described
It is additionally provided with sink 110 and vacuum air pump 123 outside babinet 100, is connected by pipeline between the sink 110 and babinet 100
It connects, the pipeline between the sink 110 and babinet 100 is vacuum tracheae 104, and unidirectional gas is provided on the vacuum tracheae 104
Valve 112 and three-way solenoid valve 130, the three-way solenoid valve 130 are connected with the vacuum air pump 123.
As shown in Figure 1, babinet 100 and sink 110 are arranged in 140 same level of rack, lid 106 is opened, will be waited for
It surveys part automotive oil tank 101 to be placed in babinet 100, air inlet pipe 102 and escape pipe 103 are all metal hose 142, can be distorted, will
Air inlet pipe 102 and escape pipe 103 are corresponded to access 101 air inlet 107 of fuel tank and gas outlet 108 and are docked using expansion rubber circle 109
Be sealed processing at mouthful, cover lid 106, lid 106, which will be open, 105 to be sealed, control circuit 141 control solenoid valve 122,
Three-way solenoid valve 130, air heater 121, air compressor and vacuum air pump 123 start the mechanism and are carried out to fuel tank 101
Detection；
Under normal temperature state：
It is when also having gas in babinet 100, control circuit 141 is just by solenoid valve using 110 detection mode of sink
122 close, and solenoid valve 122 is closed, and escape pipe 103 is blocked, and cannot make fuel tank 101 and the air heater outside fuel tank 101
121 are connected to air compressor, and air compressor is started to work, and air heater 121 at this time does not work, and passes through air inlet pipe
102 to the air for being filled with room temperature inside fuel tank 101, and after pressurization, one is gradually formed inside fuel tank 101 with pressure
Environment, three-way solenoid valve 130 open the channel towards sink 110, the channel towards vacuum air pump 123 are closed, if fuel tank
101 have the case where leakage, and the gas in babinet 100 will gradually increase, and the gas increased can form one in babinet 100
Pressure environment, the air being full of in babinet 100 also will out form bubble by vacuum tracheae 104 in sink 110, if do not had
There is bubble appearance, next step detection can be carried out；
At this point, three-way solenoid valve 130 will be closed with the vacuum tracheae 104 of 110 junction of sink so that vacuum air pump
123 can be connected by the vacuum tracheae 104 between three-way solenoid valve 130 and three-way solenoid valve 130 and babinet 100, and vacuum is taken out
Mechanism of qi 123 is started to work, and extracts the air inside babinet 100 out, makes to form vacuum environment in babinet 100, air compressor continues
It is filled with compressed gas into fuel tank 101；
Through the above steps, 101 inside of fuel tank and 101 outside of fuel tank form a pressure difference, also can be good to fine gap
Good detection is not revealed if 101 air-tightness of fuel tank is good, is also vacuum in babinet 100, there will be no gases to pass through list
To air valve 112, there will be no bubbles for the water in sink 110, and air pressure inductor 111 is also without significant change, if 101 gas of fuel tank
Close property is bad, will send leakage, and vacuum environment just obtains making up for air in fuel tank 101 in babinet 100, waits until babinet 100
After gassy and when forming pressure environment, gas can form bubble by vacuum tracheae 104 today of sink 110, with fuel tank
The 101 air pressure inductors 111 being in series will change, and pressure value can become smaller, and can be judged in this way by the observation of two phenomenons
Fuel tank 101 can carry out first time air-leakage test at normal temperatures to fuel tank 101 in this way with the presence or absence of leakage；
In a heated state：
When carrying out second of detection to fuel tank 101, control circuit 141 opens solenoid valve 122, and opens simultaneously air heating
Machine 121 and air compressor so that the air by heating recycles between fuel tank 101, pipeline, and hot-air is full of whole fuel tank
101, to fuel tank 101 with heating, after heating one end time, control circuit 141 is right according to airtight detecting step of above-mentioned first time
Fuel tank 101 carries out second and detects, and that observes the variation for having the gentle pressure inductor 111 of bubble-free in sink 110 goes out corresponding knot
By.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, these all do not interfere with what the present invention was implemented
Effect and patent practicability.
Claims (5)
1. the mechanism of detectable auto parts machinery air-tightness, including babinet and pipeline, it is characterised in that：The babinet offers out
Mouthful, the box opening is equipped with can cover the lid for running mouth jointly completely, and the sky for placing part to be measured is equipped in the babinet
The both ends of chamber, the pipeline are connected with part to be measured respectively, and the gas in pipelines flow direction is connected with solenoid valve, sky in turn
The gentle pressure inductor of gas heater, air compressor, the gentle pressure inductor of the solenoid valve, air heater, air compressor
It is placed in outside babinet and works independently from each other, sink and vacuum air pump, the sink and case are additionally provided with outside the babinet
It is connected by pipeline between body, the pipeline between the sink and babinet is vacuum tracheae, and list is provided on the vacuum tracheae
To air valve and three-way solenoid valve, the three-way solenoid valve is connected with the vacuum air pump.
2. can detect the mechanism of auto parts machinery air-tightness according to claim 1, it is characterised in that：The pipeline is that metal is soft
Pipe.
3. can detect the mechanism of auto parts machinery air-tightness according to claim 1, it is characterised in that：The pipeline and part to be measured
Air inlet and gas outlet all be tightly connected.
4. can detect the mechanism of auto parts machinery air-tightness according to claim 1, it is characterised in that：The Non-return air valve setting
Close to sink side.
5. can detect the mechanism of auto parts machinery air-tightness according to claim 1, it is characterised in that：The solenoid valve, three-dimensional
Solenoid valve, air heater, air compressor and vacuum air pump are controlled by control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810167249.XA CN108507726A (en) | 2018-02-28 | 2018-02-28 | The mechanism of detectable auto parts machinery air-tightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810167249.XA CN108507726A (en) | 2018-02-28 | 2018-02-28 | The mechanism of detectable auto parts machinery air-tightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108507726A true CN108507726A (en) | 2018-09-07 |
Family
ID=63375798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810167249.XA Pending CN108507726A (en) | 2018-02-28 | 2018-02-28 | The mechanism of detectable auto parts machinery air-tightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108507726A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI809479B (en) * | 2021-03-26 | 2023-07-21 | 廣達電腦股份有限公司 | Systems and methods of detecting leakage within chassis |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707235A (en) * | 2004-06-04 | 2005-12-14 | 精碟科技股份有限公司 | Gas leakage detector |
| CN101118197A (en) * | 2007-09-06 | 2008-02-06 | 中国核动力研究设计院 | High-temperature high pressure helium leak detection method and apparatus for detecting leakage thereof |
| CN101344451A (en) * | 2008-08-26 | 2009-01-14 | 齐诺精密系统自动化(天津)有限公司 | Air tightness detection system and method for alloy wheel rim |
| CN201207013Y (en) * | 2008-05-13 | 2009-03-11 | 重庆宗申技术开发研究有限公司 | Detecting machine for airtightness of oil tank |
| CN101403657A (en) * | 2008-11-07 | 2009-04-08 | 南京市锅炉压力容器检验研究院 | Calibration apparatus and method for ultra-high pressure safety valve |
| CN101696899A (en) * | 2009-11-09 | 2010-04-21 | 卧龙电气集团股份有限公司 | Maintenance-free detection device and method thereof of air tightness of small cell cover |
| CN101788372A (en) * | 2010-01-20 | 2010-07-28 | 台州环天机械有限公司 | Gas tightness detection device |
| CN102012302A (en) * | 2010-11-24 | 2011-04-13 | 山东万事达专用汽车制造有限公司 | Comprehensive air pressure test bed for vehicle-mounted steel tank |
| CN102494849A (en) * | 2011-11-17 | 2012-06-13 | 四川嘉宝莉涂料有限公司 | Air tightness detecting device and implementation method for same |
| CN103210293A (en) * | 2010-08-10 | 2013-07-17 | 威尔科股份公司 | Method and apparatus for leak testing containers |
| CN103913279A (en) * | 2014-04-04 | 2014-07-09 | 浙江银轮机械股份有限公司 | Method and device for testing leakproofness of oil cooler by mixing helium and air |
| CN204043869U (en) * | 2013-12-31 | 2014-12-24 | 浙江大华技术股份有限公司 | A kind of air-tightness detection device |
| CN104359626A (en) * | 2014-11-24 | 2015-02-18 | 山东蒙沃变速器有限公司 | Test piece air tightness detection device and method |
| US20150219522A1 (en) * | 2014-02-04 | 2015-08-06 | Ford Global Technologies, Llc | Correlation based fuel tank leak detection |
| CN205826238U (en) * | 2016-05-27 | 2016-12-21 | 重庆治中机械制造有限公司 | A kind of cavity part high temperature leak detection system |
| CN106323569A (en) * | 2016-08-18 | 2017-01-11 | 河北汉光重工有限责任公司 | Fuel tank airtightness detection device and test method |
| CN206269979U (en) * | 2016-11-30 | 2017-06-20 | 潍坊安泰玛钢有限公司 | A kind of tightness test device |
| CN107515087A (en) * | 2017-09-04 | 2017-12-26 | 沁园集团股份有限公司 | A kind of device for detecting sealability and method of monomer filter flask filtration system |
-
2018
- 2018-02-28 CN CN201810167249.XA patent/CN108507726A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707235A (en) * | 2004-06-04 | 2005-12-14 | 精碟科技股份有限公司 | Gas leakage detector |
| CN101118197A (en) * | 2007-09-06 | 2008-02-06 | 中国核动力研究设计院 | High-temperature high pressure helium leak detection method and apparatus for detecting leakage thereof |
| CN201207013Y (en) * | 2008-05-13 | 2009-03-11 | 重庆宗申技术开发研究有限公司 | Detecting machine for airtightness of oil tank |
| CN101344451A (en) * | 2008-08-26 | 2009-01-14 | 齐诺精密系统自动化(天津)有限公司 | Air tightness detection system and method for alloy wheel rim |
| CN101403657A (en) * | 2008-11-07 | 2009-04-08 | 南京市锅炉压力容器检验研究院 | Calibration apparatus and method for ultra-high pressure safety valve |
| CN101696899A (en) * | 2009-11-09 | 2010-04-21 | 卧龙电气集团股份有限公司 | Maintenance-free detection device and method thereof of air tightness of small cell cover |
| CN101788372A (en) * | 2010-01-20 | 2010-07-28 | 台州环天机械有限公司 | Gas tightness detection device |
| CN103210293A (en) * | 2010-08-10 | 2013-07-17 | 威尔科股份公司 | Method and apparatus for leak testing containers |
| CN102012302A (en) * | 2010-11-24 | 2011-04-13 | 山东万事达专用汽车制造有限公司 | Comprehensive air pressure test bed for vehicle-mounted steel tank |
| CN102494849A (en) * | 2011-11-17 | 2012-06-13 | 四川嘉宝莉涂料有限公司 | Air tightness detecting device and implementation method for same |
| CN204043869U (en) * | 2013-12-31 | 2014-12-24 | 浙江大华技术股份有限公司 | A kind of air-tightness detection device |
| US20150219522A1 (en) * | 2014-02-04 | 2015-08-06 | Ford Global Technologies, Llc | Correlation based fuel tank leak detection |
| CN103913279A (en) * | 2014-04-04 | 2014-07-09 | 浙江银轮机械股份有限公司 | Method and device for testing leakproofness of oil cooler by mixing helium and air |
| CN104359626A (en) * | 2014-11-24 | 2015-02-18 | 山东蒙沃变速器有限公司 | Test piece air tightness detection device and method |
| CN205826238U (en) * | 2016-05-27 | 2016-12-21 | 重庆治中机械制造有限公司 | A kind of cavity part high temperature leak detection system |
| CN106323569A (en) * | 2016-08-18 | 2017-01-11 | 河北汉光重工有限责任公司 | Fuel tank airtightness detection device and test method |
| CN206269979U (en) * | 2016-11-30 | 2017-06-20 | 潍坊安泰玛钢有限公司 | A kind of tightness test device |
| CN107515087A (en) * | 2017-09-04 | 2017-12-26 | 沁园集团股份有限公司 | A kind of device for detecting sealability and method of monomer filter flask filtration system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI809479B (en) * | 2021-03-26 | 2023-07-21 | 廣達電腦股份有限公司 | Systems and methods of detecting leakage within chassis |
| US11761842B2 (en) | 2021-03-26 | 2023-09-19 | Quanta Computer Inc. | Systems and methods of detecting leakage within a chassis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210741775U (en) | Air tightness detection device | |
| CN1908609B (en) | Dry testing method for pressure limiting valve opening pressure | |
| CN104236826A (en) | Bagged product tightness detection device and method | |
| US10302523B2 (en) | Method for testing a seal of a sealed bearing cavity | |
| CN105241645B (en) | The detection device of the small flow air filter intake resistance of universal machine | |
| CN109506924B (en) | Cooling liquid pot cover detection device and detection method thereof | |
| CN108507726A (en) | The mechanism of detectable auto parts machinery air-tightness | |
| CN205826248U (en) | Water supply and sewerage pipeline detection device | |
| CN107490459B (en) | A kind of ventilating control method of air-leakage detector detection seal products | |
| CN108151973A (en) | A kind of detection device for detecting packaging bag air-tightness | |
| CN204788858U (en) | Fuel filter seal tightness test device | |
| CN205642743U (en) | Airtight detection inflation inlet of intake pipe combination formula block structure | |
| CN210071254U (en) | Differential pressure type air tightness tester | |
| CN208223754U (en) | Detection tool for tightness of intake manifold | |
| JPH0128329B2 (en) | ||
| CN205404060U (en) | Heavy -calibre valve elevated -temperature seal test device | |
| CN215323334U (en) | Wide static pressure regulator | |
| CN208805333U (en) | Fuel tank of vehicle leakage testing | |
| CN204666318U (en) | A kind of vehicle gas leak detection device | |
| CN113146899A (en) | Flame-retardant foamed rubber vulcanization processing system and method | |
| JPWO2023021606A5 (en) | ||
| CN219736801U (en) | Valve testing device | |
| CN210108640U (en) | Water heater gas tightness detection device | |
| CN107607270A (en) | A kind of energy-saving equipment and application method of automatic detection exhaust manifold air-tightness | |
| CN208187643U (en) | A kind of device for searching leak source for die casting assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180907 |
|
| RJ01 | Rejection of invention patent application after publication |