CN101788372A - Gas tightness detection device - Google Patents

Gas tightness detection device Download PDF

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Publication number
CN101788372A
CN101788372A CN201010109784A CN201010109784A CN101788372A CN 101788372 A CN101788372 A CN 101788372A CN 201010109784 A CN201010109784 A CN 201010109784A CN 201010109784 A CN201010109784 A CN 201010109784A CN 101788372 A CN101788372 A CN 101788372A
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CN
China
Prior art keywords
air
valve
tightness detection
gas
control
Prior art date
Application number
CN201010109784A
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Chinese (zh)
Inventor
黄正继
Original Assignee
台州环天机械有限公司
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Application filed by 台州环天机械有限公司 filed Critical 台州环天机械有限公司
Priority to CN201010109784A priority Critical patent/CN101788372A/en
Publication of CN101788372A publication Critical patent/CN101788372A/en

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Abstract

The invention provides a gas tightness detection device, which belongs to the technical field of detection, and solves the problems that the existing air tightness detection method has low efficiency and inaccurate detection. The gas tightness detection device comprises a gas source and a control system, and also comprises a detection chamber with a gas inlet and a gas outlet, wherein the detection chamber is provided with a detector; the detector is used for detecting the pressure in the detection chamber and feeding back to the control system; the gas inlet of the detection chamber is connected with a control valve 1 in series through a pipeline and then is communicated with the gas source; the gas outlet of the detection chamber is connected with a control valve 2 in series through a pipeline and then is communicated with the tightness part to be detected of a part to be detected, and the control system is used for controlling the opening and closing of the control valve 1 and the control valve 2. The gas tightness detection device has the advantages of high detection efficiency, accurate detected result, high degree of automation and the like.

Description

A kind of air-tightness detection device

Technical field

The invention belongs to the detection technique field, relate to a kind of checkout equipment of product, more particularly, relate to a kind of bubble-tight pick-up unit of testing product that is used for.

Background technology

In the prior art, usually need all that the product that has impermeability to require is carried out impermeability and detect, with determine whether it leaks gas, leakage etc., and then determine whether it qualified, make every effort to the undesirable product of impermeability is detected in advance, avoid when installing or use, causing quality accident.

Traditional detection method all is with seal the import and export of product to be stopped up usually, immerse again in the water, with the mode of artificial naked eyes observe its whether bubbling and the bubble of being emerged how much, thereby judge whether it is specification product.

The not enough main following points of this mode: 1, waste water resource, consume a large amount of water; 2, accuracy is not high, judges with operator's experience whether it is qualified entirely, needs operator's multi-angle to observe sometimes, is easy to generate and fails to judge; So, usually unacceptable product is regarded as also that certified products use or with certified products regard as unacceptable product need not, thereby influence product quality and output; 3, the unified criterion of neither one, it is too big influenced by human factor; Even to identical product, different operators' testing result is probably different; 4, operator's labour intensity is big, production efficiency is low.

Also having a kind of method is to pour into water or kerosene etc. to the sealing of product part to be measured, observe its within a certain period of time the water of seepage or kerosene drip number, whether qualified with this sealing of judging product, this method exists inefficient shortcoming equally.

And comparatively advanced at present detection method is to use atmospheric control that pressure gas is input in the test specimen, automatically shuts down source of inflation gas then.Whether qualified the pressure of part to be measured under sealing state that detects test specimen changes whether surpass predetermined value, obtain sealing the result of determination of product to be measured thus.As a kind of checkout equipment and detection method (its publication number is CN101191754A) that is used for the testing product sealing that Chinese patent provided, this checkout equipment comprises seal, path, solenoid valve, pick-up unit and control device, control device is used for the switching of control electromagnetic valve, the pressure detection result that reception is sent by pick-up unit, whether qualified whether surpass reservation threshold, obtain sealing the result of determination of product to be measured thus if determining in the predetermined amount of time inner gateway that the pressure under the sealing state changes.

But, this detection mode still has weak point, most products is in particular in: owing to more or less all can exist the problem of sealing, when pressurized air when charging into, can exist while inflating the situation of leaking gas, cause the interior gaseous tension instability of product of input, the accuracy that influence detects.

Summary of the invention

The objective of the invention is at the existing the problems referred to above of existing air-tightness detection device, and proposed a kind of detected gas that steady pressure is provided, improve the air-tightness detection device of detection accuracy.

Purpose of the present invention can realize by following technical proposal: a kind of air-tightness detection device, comprise source of the gas and control system, it is characterized in that, described pick-up unit also includes a sensing chamber with air intake opening and gas outlet, sensing chamber is provided with detecting device, this detecting device is used to detect sensing chamber's internal pressure size and feeds back to control system, the air intake opening of described sensing chamber is connected in series an operation valve one back by pipeline and is communicated with source of the gas, the gas outlet of sensing chamber is connected in series an operation valve two backs by pipeline equally and is communicated with to be measured sealing part to be measured, and above-mentioned control system is used to control the switching of described operation valve one and operation valve two.

During inflation, under the control of control system, operation valve one is opened, and operation valve two is closed.Source of the gas charges into pressure gas by pipeline and operation valve one in sensing chamber, when the pressure in the sensing chamber reached setting value, control system control operation valve one was closed, and operation valve two is opened, and sensing chamber is communicated with to be measured sealing part to be measured.Control system then judges according to sensing chamber's pressure decline degree of detecting device feedback whether to be measured the sealing property of sealing part to be measured is qualified.

In above-mentioned a kind of air-tightness detection device, described control system comprises central processing unit and is connected control module, setting module, timing module and display on the central processing unit, control module is connected with operation valve two with above-mentioned operation valve one, and central processing unit is connected with above-mentioned detecting device.

But setting module set pressure upper limit P1 (original pressure after sensing chamber's inflation), low pressure limit P2 and leak time T.Timing module carries out timing to leak time, reach the leak time T of initial setting when timing after, if the pressure value in the sensing chamber that receives of central processing unit judges promptly that also greater than the low pressure limit P2 of initial setting product is qualified; If the pressure in the sensing chamber, is judged promptly that product is defective less than the low pressure limit P2 of initial setting and is stopped test.The system log (SYSLOG) test result, and in real time by display reflection pressure drop and time curve.

In above-mentioned a kind of air-tightness detection device, described detecting device is a pressure transducer.

In above-mentioned a kind of air-tightness detection device, also be provided with an air release on the pipeline between the described sealing part to be measured that is used to be communicated with operation valve two and to be measured, described air release is connected with above-mentioned control module.After a product test finishes, because the pipeline internal gas pressure between operation valve two and the measured piece is higher, can cause the gases at high pressure ejection if take off test products immediately, cause security incident.Therefore at this air release is set, the gases at high pressure in the pipeline is discharged take off product more earlier.

In above-mentioned a kind of air-tightness detection device, described operation valve one and operation valve two are solenoid valve.

In above-mentioned a kind of air-tightness detection device, described air-tightness detection device also includes worktable, and worktable is provided with and is used for fixing to be measured fixed mechanism.

In above-mentioned a kind of air-tightness detection device, described fixed mechanism is anchor clamps.

In above-mentioned a kind of air-tightness detection device, described source of the gas is an air compressor.

Compared with prior art, this air-tightness detection device is preset a sensing chamber, and the preliminary filling gas by sensing chamber provides a stable detected air pressure, reflects the sealing property of product simultaneously by the variation of sensing chamber's internal pressure, and it is more accurate to detect.Many set detecting devices can a public source of the gas air feed, and does not influence each other mutually between each set detecting device, has improved work efficiency, has reduced cost.

Description of drawings

Fig. 1 is the principle schematic of this air-tightness detection device.

Fig. 2 is the functional-block diagram of control system in this air-tightness detection device.

Among the figure, 1, sensing chamber; 2, detecting device; 3, pipeline; 4, operation valve one; 5, source of the gas; 6, operation valve two; 7, to be measured; 8, air release; 9, worktable; 10, anchor clamps; 11, operation valve three.

Embodiment

Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.

As shown in Figure 1, this air-tightness detection device comprises source of the gas 5, control system and the container one as sensing chamber 1, and container one has air intake opening and gas outlet, and container one is provided with detecting device 2.The air intake opening of container one is communicated with source of the gas 5 by pipeline 3 serial connection operation valves one 4 backs, the gas outlet of container one is serially connected with operation valve 26 back by pipeline 3 equally and is communicated with to be measured 7 sealing part to be measured, also is provided with air release 8 on the pipeline 3 between operation valve 26 and to be measured 7.Be placed on for to be measured 7 on the worktable 9, and be fixed on the worktable 9 by anchor clamps 10.In the present embodiment, described detecting device 2 is a pressure transducer, and source of the gas 5 is an air compressor of the prior art, and operation valve 1 and operation valve 26 are solenoid valve.

As shown in Figure 2, control system comprises central processing unit and is connected control module, setting module, timing module and display on the central processing unit, control module is connected with above-mentioned operation valve 1, operation valve 26 and air release 8, and central processing unit is connected with above-mentioned detecting device 2.

Before the test, at first import every primary data by setting module, setting module can wait by guidance panel and realize, the primary data of input comprises upper pressure limit P1 (original pressure after sensing chamber's 1 inflation), low pressure limit P2 and leak time T.And to be measured 7 be fixedly mounted on the worktable 9, the pipeline 3 that connects container one gas outlet is communicated with to be measured 7 sealing part to be measured, in the present embodiment, to be measured 7 is air valve, and the one-way sealing of air valve is tested.

When beginning to test, central processing unit is opened by control module control operation valve 1, and operation valve 26 is closed, and source of the gas 5 charges into pressure gas toward container one in, and the detecting device 2 on the container one pressure in the detection receptacle one constantly is big or small and feed back to central processing unit.When the pressure size in the container one reaches the upper pressure limit P1 of setting by the time (can according to actual conditions adjustment, compensation), control operation valve 1 is closed, operation valve 26 is opened, to be measured 7 sealing part to be measured is communicated with container one, this moment, container one interior pressure began to descend, and timing module picks up counting simultaneously.Reach the leak time T of initial setting when the timing module timing time after, if this moment the container one that receives of central processing unit pressure value greater than the low pressure limit P2 of initial setting, judge that then this product is certified products; If in leak time T, the pressure in the container one judges promptly that less than low pressure limit P2 product is unacceptable product and stops test.The central processing unit logging test results, and reflect pressure drop and time curve by display in real time.

After test was finished, operation valve 26 was closed and air release 8 is opened and exits, and can take off test products after venting is finished.

In order to save cost and increasing work efficiency, two set detecting devices can be connected to jointly on the source of the gas 5, as shown in Figure 1, only need control the switching relation of operation valve 1 and operation valve 3 11 well, just can make between two set detecting devices to be independent of each other.

Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Claims (8)

1. air-tightness detection device, comprise source of the gas (5) and control system, it is characterized in that, described pick-up unit also includes a sensing chamber (1) with air intake opening and gas outlet, sensing chamber (1) is provided with detecting device (2), this detecting device (2) is used to detect sensing chamber (1) internal pressure size and feeds back to control system, the air intake opening of described sensing chamber (1) is communicated with source of the gas (5) by pipeline (3) serial connection one operation valve one (4) back, the gas outlet of sensing chamber (1) is communicated with the sealing of to be measured (7) part to be measured by pipeline (3) serial connection one operation valve two (6) backs equally, and above-mentioned control system is used to control the switching of described operation valve one (4) and operation valve two (6).
2. a kind of air-tightness detection device according to claim 1, it is characterized in that, described control system comprises central processing unit and is connected control module, setting module, timing module and display on the central processing unit, control module is connected with operation valve two (6) with above-mentioned operation valve one (4), and central processing unit is connected with above-mentioned detecting device (2).
3. a kind of air-tightness detection device according to claim 1 and 2 is characterized in that, described detecting device (2) is a pressure transducer.
4. a kind of air-tightness detection device according to claim 1 and 2, it is characterized in that, also be provided with an air release (8) on the pipeline (3) between the described sealing part to be measured that is used to be communicated with operation valve two (6) and to be measured (7), described air release (8) is connected with above-mentioned control module.
5. a kind of air-tightness detection device according to claim 1 and 2 is characterized in that, described operation valve one (4) and operation valve two (6) are solenoid valve.
6. a kind of air-tightness detection device according to claim 1 and 2 is characterized in that, described air-tightness detection device also includes worktable (9), and worktable (9) is provided with the fixed mechanism that is used for fixing to be measured (7).
7. a kind of air-tightness detection device according to claim 6 is characterized in that, described fixed mechanism is anchor clamps (10).
8. a kind of air-tightness detection device according to claim 1 and 2 is characterized in that, described source of the gas (5) is an air compressor.
CN201010109784A 2010-01-20 2010-01-20 Gas tightness detection device CN101788372A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102147318A (en) * 2011-01-11 2011-08-10 肇庆市骏驰科技有限公司 Automatic tightness test device for high-precision seal pipefitting and use method thereof
CN102343553A (en) * 2011-09-28 2012-02-08 上海宏力半导体制造有限公司 Dresser device and detection method thereof
CN102661837A (en) * 2012-05-15 2012-09-12 新疆大全新能源有限公司 Detection method for micro-leakage of reduction furnace
CN102879157A (en) * 2012-10-19 2013-01-16 中国人民解放军理工大学 Airtightness detection method for protective engineering ventilation system and system thereof
CN102967422A (en) * 2012-11-07 2013-03-13 柳州市菱宝汽车部件有限责任公司 Method and device for detecting gas tightness of vacuum booster
CN103234706A (en) * 2013-04-25 2013-08-07 江苏中核利柏特股份有限公司 Pneumoelectric distributor for testing gas tightness of process module pipeline
CN103323183A (en) * 2013-05-27 2013-09-25 青岛吉澳尔电子有限公司 Inlaid type porcelain bushing leak detector
CN103398827A (en) * 2013-07-18 2013-11-20 裕克施乐塑料制品(太仓)有限公司 Air tightness detection device
CN103900772A (en) * 2012-12-27 2014-07-02 北京谊安医疗系统股份有限公司 Air-tightness detection method and detection device for gas supplying system of medical tower crane and suspension bridge
CN104135706A (en) * 2014-07-31 2014-11-05 歌尔声学股份有限公司 A direct pressure type gas tightness detection device and a gas tightness detection method
CN104155070A (en) * 2013-05-13 2014-11-19 北京德尔福万源发动机管理系统有限公司 Airtightness detecting device and method
CN104180952A (en) * 2014-07-19 2014-12-03 芜湖恒坤汽车部件有限公司 Double-piece-linkage airtightness testing clamp for brake hydraulic cylinders
CN104655372A (en) * 2013-11-18 2015-05-27 苏州东南电碳科技有限公司 Air tightness detection system for pantograph slide plate and detection method thereof
US9121411B2 (en) 2012-02-02 2015-09-01 Kabushiki Kaisha Toyota Jidoshokki Motor driven compressor and hermetic sealing inspection method for the same
CN108287485A (en) * 2017-12-04 2018-07-17 中国飞机强度研究所 A kind of inflation method of more inflation bracket loading test platforms
CN108507726A (en) * 2018-02-28 2018-09-07 重庆广福科技有限公司 The mechanism of detectable auto parts machinery air-tightness
CN109827716A (en) * 2019-01-25 2019-05-31 重庆融焕电器有限公司 A kind of gas meter movement leak test detection device

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102147318A (en) * 2011-01-11 2011-08-10 肇庆市骏驰科技有限公司 Automatic tightness test device for high-precision seal pipefitting and use method thereof
CN102343553A (en) * 2011-09-28 2012-02-08 上海宏力半导体制造有限公司 Dresser device and detection method thereof
CN102343553B (en) * 2011-09-28 2015-06-17 上海华虹宏力半导体制造有限公司 Dresser device and detection method thereof
CN103244414B (en) * 2012-02-02 2016-03-09 株式会社丰田自动织机 Motor compressor and airtight test method thereof
US9121411B2 (en) 2012-02-02 2015-09-01 Kabushiki Kaisha Toyota Jidoshokki Motor driven compressor and hermetic sealing inspection method for the same
CN102661837A (en) * 2012-05-15 2012-09-12 新疆大全新能源有限公司 Detection method for micro-leakage of reduction furnace
CN102661837B (en) * 2012-05-15 2014-04-02 新疆大全新能源有限公司 Detection method for micro-leakage of reduction furnace
CN102879157A (en) * 2012-10-19 2013-01-16 中国人民解放军理工大学 Airtightness detection method for protective engineering ventilation system and system thereof
CN102967422A (en) * 2012-11-07 2013-03-13 柳州市菱宝汽车部件有限责任公司 Method and device for detecting gas tightness of vacuum booster
CN102967422B (en) * 2012-11-07 2015-06-10 广西柳州中嘉知识产权服务有限公司 Method and device for detecting gas tightness of vacuum booster
CN103900772A (en) * 2012-12-27 2014-07-02 北京谊安医疗系统股份有限公司 Air-tightness detection method and detection device for gas supplying system of medical tower crane and suspension bridge
CN103234706A (en) * 2013-04-25 2013-08-07 江苏中核利柏特股份有限公司 Pneumoelectric distributor for testing gas tightness of process module pipeline
CN104155070A (en) * 2013-05-13 2014-11-19 北京德尔福万源发动机管理系统有限公司 Airtightness detecting device and method
CN103323183B (en) * 2013-05-27 2016-08-24 青岛吉澳尔电子有限公司 A kind of press insert type insulator leak test plant
CN103323183A (en) * 2013-05-27 2013-09-25 青岛吉澳尔电子有限公司 Inlaid type porcelain bushing leak detector
CN103398827A (en) * 2013-07-18 2013-11-20 裕克施乐塑料制品(太仓)有限公司 Air tightness detection device
CN103398827B (en) * 2013-07-18 2015-08-19 裕克施乐塑料制品(太仓)有限公司 A kind of air-tightness detection device
CN104655372A (en) * 2013-11-18 2015-05-27 苏州东南电碳科技有限公司 Air tightness detection system for pantograph slide plate and detection method thereof
CN104655372B (en) * 2013-11-18 2018-06-01 苏州东南佳新材料股份有限公司 Pantograph pan air tightness detection system and its detection method
CN104180952A (en) * 2014-07-19 2014-12-03 芜湖恒坤汽车部件有限公司 Double-piece-linkage airtightness testing clamp for brake hydraulic cylinders
CN104180952B (en) * 2014-07-19 2017-04-05 芜湖恒坤汽车部件有限公司 A kind of airtight test fixture of double-piece coordinated type brake fluid cylinder pressure
CN104135706A (en) * 2014-07-31 2014-11-05 歌尔声学股份有限公司 A direct pressure type gas tightness detection device and a gas tightness detection method
CN108287485A (en) * 2017-12-04 2018-07-17 中国飞机强度研究所 A kind of inflation method of more inflation bracket loading test platforms
CN108507726A (en) * 2018-02-28 2018-09-07 重庆广福科技有限公司 The mechanism of detectable auto parts machinery air-tightness
CN109827716A (en) * 2019-01-25 2019-05-31 重庆融焕电器有限公司 A kind of gas meter movement leak test detection device

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Application publication date: 20100728