CN104062081A - Remotely-controlled wide-range gas leakage rate detection device - Google Patents
Remotely-controlled wide-range gas leakage rate detection device Download PDFInfo
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- CN104062081A CN104062081A CN201310089515.9A CN201310089515A CN104062081A CN 104062081 A CN104062081 A CN 104062081A CN 201310089515 A CN201310089515 A CN 201310089515A CN 104062081 A CN104062081 A CN 104062081A
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Abstract
The invention discloses a remotely-controlled wide-range gas leakage rate detection device which is mainly used for gas leakage rate detection in a test process of a low-temperature valve of an oxyhydrogen rocket. The device includes a camera device, a data processor, a unit control console, a measurement and control cable, a gas collecting tube, flow meters, a bubble leakage detector, electromagnetic valves and a metal pipe. The remotely-controlled wide-range gas leakage rate detection device adjusts a measurement range through the unit control console and has a function of a flow meter and a function of bubble leakage detection and leakage rate data are obtained through remote monitoring. The bubble leakage detector is designed according to a pressure balance principle of communicated containers so that frozen accidents caused by back flow of a leakage liquid, which is resulted from low temperature negative pressure of a gas, can be effectively prevented. The device realizes remote control of leakage rate detection of a low temperature test and realizes a man-machine isolation operation mode so that the device is applicable to leakage rate detection of different leakage rate assemblies and capable of improving test security.
Description
Technical field
The present invention relates to a kind of gas device for detecting leak rate, relate in particular to a kind of Long-distance Control wide-range gas device for detecting leak rate, the leak rate being mainly used in hydrogen-oxygen rocket Subzero valve process of the test detects.Belong to liquid propellant rocket engine test technology.
Background technology
Subzero valve test is the Main Means of check Subzero valve reliability of technology and working environment adaptive faculty.Rocket is at mission phase, and operating mode is complicated severe, and the serviceability of valve is standing very strict test.Therefore, the properties of grasping valve by research technique is very necessary, and along with the development of carrier rocket, a large amount of low-temperature test systems are built up in succession.In order to simulate worst cold case complicated and changeable on arrow, pilot system has generally been used the danger medium such as liquid hydrogen, liquid oxygen, hydrogen, and this also has higher requirement to experimental test technology.Subzero valve leak rate detects, and is the main method of testing valve door sealing performance.Leak rate detection experience in the past, is by the manual leakage detecting instrument of different ranges on probation successively, until suitable range, on-the-spot interpretation leak rate.This detection method complex operation, inefficiency, state of the art is difficult to control.Due to scene, have the danger medium such as inflammable and explosive liquid hydrogen, gases at high pressure, there is larger potential safety hazard in operating process simultaneously.Therefore a kind of advanced person's leak rate detection technique becomes the new problem of Subzero valve test.
Summary of the invention
The technical matters that the present invention solves is: overcome the deficiencies in the prior art, a kind of Long-distance Control wide-range gas device for detecting leak rate is provided.The present invention is regulated and is measured range by unit controls, possess two kinds of functions of flowmeter and leak detection by bubbles simultaneously, by remote data processor, obtain measurement data, realized the operator scheme of man-machine isolation, the leak rate that is not only applicable to different leak rate subassemblies detects, and has improved experimental safe.Leak detection by bubbles instrument, according to the design of connection container pressure balance principle, can effectively prevent from causing because of gas low temperature negative pressure the freezing accident that leak detection liquid flows backwards and causes.
Technical scheme of the present invention is: a kind of Long-distance Control wide-range gas device for detecting leak rate, is comprised of picture pick-up device, data acquisition unit, unit control table, measurement and control cable, discharge, flowmeter, leak detection by bubbles instrument, solenoid valve, metal tube.Wherein data processor, unit control table are respectively teledata acquisition device and unit control apparatus, by measurement and control cable, are connected with solenoid valve, flowmeter, realize remote monitoring, control function; Picture pick-up device is mainly monitored leak detection by bubbles instrument; Discharge, flowmeter, leak detection by bubbles instrument, solenoid valve, metal tube form device for detecting leak rate, discharge design processing entrance, exhausr port, a N outlet, entrance and exhausr port all arrange solenoid valve, and N outlet is connected with " solenoid valve+flowmeter ", " solenoid valve+leak detection by bubbles instrument " respectively.
Described N is flowmeter number and leak detection by bubbles instrument number sum.
Described leak detection by bubbles instrument designs according to connection container pressure balance principle.
The present invention's beneficial effect is compared with prior art:
(1) the present invention adopts unit controls technology and Remote Monitoring Technology, has realized the operator scheme of man-machine isolation, improves experimental safe.When leak rate occurs, only need to be between observing and controlling the range of remote adjustment device for detecting leak rate, range can obtain data by data acquisition unit or picture pick-up device after determining;
(2) the present invention adopts unit control method to select the flowmeter of suitable range, has reduced operation easier, the testing efficiency of raising;
(3) the present invention possesses remote monitoring bubble method detection, and leak detection by bubbles instrument, according to the design of connection container pressure balance principle, can effectively prevent from causing because of gas low temperature negative pressure the freezing accident that leak detection liquid flows backwards and causes.
Accompanying drawing explanation
Fig. 1 is composition structural representation of the present invention;
In figure: 1. data processor, 2. exhaust solenoid valve, 3. discharge, 4. solenoid valve, 5. flowmeter, 6. leak detection by bubbles instrument, 7. metal tube, 8. entrance solenoid valve, 9. unit control table;
Fig. 2 is leak detection by bubbles instrument schematic diagram;
Embodiment
Below in conjunction with accompanying drawing explanation and specific embodiment, the invention will be further described:
The present invention is mainly comprised of picture pick-up device, data processor 1, unit control table 9, measurement and control cable, discharge 3, flowmeter 5, leak detection by bubbles instrument 6, solenoid valve (2,4,8), metal tube 7.Wherein data processor 1, unit control table 9 are respectively teledata acquisition device and unit control apparatus, realize remote monitoring, control function; Picture pick-up device is mainly monitored leak detection by bubbles instrument 6; Discharge 3, flowmeter 5, leak detection by bubbles instrument 6, solenoid valve 4, metal tube 7 form device for detecting leak rate, discharge 3 design processing entrances, exhausr port, a N outlet, entrance and exhausr port all arrange solenoid valve, N " solenoid valve+flowmeter ", " solenoid valve+leak detection by bubbles instrument " parallel connection, connect respectively N outlet of discharge.
Principle of work of the present invention: unit control table 9 is connected with solenoid valve 4 by measurement and control cable, controls electromagnetic valve work state by unit control table; Flowmeter 5 is connected with data acquisition unit 1 by measurement and control cable, realizes remote data acquisition; The duty of picture pick-up device remote monitoring leak detection by bubbles instrument 6.When the present invention starts working, open the entrance solenoid valve 8 being connected with discharge, if having test surplus pressure in detected valve, open exhaust solenoid valve 2, after ambient pressure balance, close exhaust solenoid valve 2, enter leak rate detection-phase.A plurality of flowmeters 5,6 parallel connections of leak detection by bubbles instrument in the present invention, be connected with discharge 3 by solenoid valve 4 respectively, opens arbitrary way solenoid valve 4, and corresponding flowmeter 5 (leak detection by bubbles instrument 6) is started working.General each 1 tunnel of only selecting, can select by descending examination of flowmeter range.The test data of flowmeter 5 is shown in real time by data acquisition unit 1.When leak rate is less than minimum range flowmeter 5, open the solenoid valve 4 being connected with leak detection by bubbles instrument 6, by picture pick-up device, observe bubble, simultaneously counting.
Under low-temperature condition, if Subzero valve sealing is better, cryogenic gas easily produces negative pressure, while adopting leakage detection by bubble emission method, and the situation that the liquid of often can hunting leak flows backwards.If find that not in time, liquid flows backward to Subzero valve inside, be easy to produce freezing, cause valve to damage.Leak detection by bubbles instrument 6 of the present invention utilizes pressure balance principle design, once there is leak detection liquid, flows backwards, and liquid can flow into empty transparent vessel (seeing Fig. 2), and this process can be caught by monitoring camera-shooting completely, closes in time respective electrical magnet valve.Prevented that refluence liquid from directly entering leakage detection apparatus, then entered Subzero valve inside, effectively avoided the generation of freezing accident.And for the bubble level leakage rate of normal generation, leak detection by bubbles instrument 6 also can obtain authentic and valid measurement data.
In practical application, can according to circumstances select flowmeter, for mass flowmeter, can realize data acquisition, for glass rotameter, also can observe flowmeter registration by picture pick-up device.
The present invention not detailed description is known to the skilled person technology.
Claims (4)
1. a Long-distance Control wide-range gas device for detecting leak rate, is characterized in that: picture pick-up device, data processor (1), unit control table (9), measurement and control cable, discharge (3), flowmeter (5), leak detection by bubbles instrument (6), solenoid valve (2,4,8), metal tube (7), consist of.Wherein data processor (1), unit control table (9) are respectively teledata acquisition device and unit control apparatus, realize remote monitoring, control function; Picture pick-up device is mainly monitored leak detection by bubbles instrument (6); Discharge (3), flowmeter (5), leak detection by bubbles instrument (6), solenoid valve (4), metal tube (7) form device for detecting leak rate, discharge (3) inlet porting solenoid valve (2), outlet solenoid valve (8), a N outlet, N " solenoid valve+flowmeter ", " solenoid valve+leak detection by bubbles instrument " parallel connection, connect respectively N outlet of discharge.
2. a kind of Long-distance Control wide-range gas device for detecting leak rate according to claim 1, is characterized in that: two kinds of functions of flowmeter and leak detection by bubbles, multiple range flow meter is in parallel, realizes wide-range leak rate and detects.
3. a kind of Long-distance Control wide-range gas device for detecting leak rate according to claim 1, is characterized in that: adopt data processor (1), unit control table (9), picture pick-up device, measurement and control cable to realize Long-distance Control and measure.
4. a kind of Long-distance Control wide-range gas device for detecting leak rate according to claim 1, it is characterized in that: according to connection container equilibrium principle design leak detection by bubbles instrument (6), can effectively prevent from causing because of gas low temperature negative pressure the freezing accident that leak detection liquid flows backwards and causes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310089515.9A CN104062081A (en) | 2013-03-20 | 2013-03-20 | Remotely-controlled wide-range gas leakage rate detection device |
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| CN201310089515.9A CN104062081A (en) | 2013-03-20 | 2013-03-20 | Remotely-controlled wide-range gas leakage rate detection device |
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| CN201310089515.9A Pending CN104062081A (en) | 2013-03-20 | 2013-03-20 | Remotely-controlled wide-range gas leakage rate detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215406A (en) * | 2014-09-12 | 2014-12-17 | 天津博益气动股份有限公司 | Wide-range flow-type leak detector and detection method thereof |
| CN105606316A (en) * | 2016-03-11 | 2016-05-25 | 南京工业大学 | Bubble automatic counting and bubble leakage speed testing device for bubble method valve leakage test |
| CN111448600A (en) * | 2017-12-06 | 2020-07-24 | 爱惜康有限责任公司 | Modeling pulmonary leak |
| CN111841153A (en) * | 2020-06-08 | 2020-10-30 | 合肥通用机械研究院有限公司 | Multi-cavity bubble counter for gas leakage detection system |
-
2013
- 2013-03-20 CN CN201310089515.9A patent/CN104062081A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215406A (en) * | 2014-09-12 | 2014-12-17 | 天津博益气动股份有限公司 | Wide-range flow-type leak detector and detection method thereof |
| CN105606316A (en) * | 2016-03-11 | 2016-05-25 | 南京工业大学 | Bubble automatic counting and bubble leakage speed testing device for bubble method valve leakage test |
| CN111448600A (en) * | 2017-12-06 | 2020-07-24 | 爱惜康有限责任公司 | Modeling pulmonary leak |
| CN111841153A (en) * | 2020-06-08 | 2020-10-30 | 合肥通用机械研究院有限公司 | Multi-cavity bubble counter for gas leakage detection system |
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Application publication date: 20140924 |