CN209102291U - A kind of continuous leak detection system of one-component - Google Patents
A kind of continuous leak detection system of one-component Download PDFInfo
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- CN209102291U CN209102291U CN201821885384.XU CN201821885384U CN209102291U CN 209102291 U CN209102291 U CN 209102291U CN 201821885384 U CN201821885384 U CN 201821885384U CN 209102291 U CN209102291 U CN 209102291U
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Abstract
The utility model relates to a kind of continuous leak detection systems of one-component, including sample detecting probe, connector, three-way magnetic valve, flow sensor, surge tank, sampling air pump and blowback air pump and governor circuit, sample detecting probe, connector, three-way magnetic valve, flow sensor, surge tank and sampling air pump are sequentially connected composition measurement gas circuit, and blowback air pump, three-way magnetic valve, connector and sample detecting probe constitute blowback and clean gas circuit.The signal output end of sample detecting probe is connected through connector with governor circuit, and flow sensor, three-way magnetic valve, sampling air pump and blowback air pump are connected with governor circuit respectively.The utility model cleans gas circuit using measurement gas circuit and blowback, is judged automatically by concentration and noise and opens blowback cleaning gas circuit, and environment interference is strong.It is popped one's head in, hydrogen gas leakage concentration is measured using air-sensitive film, high sensitivity, fast response time by moving handle formula sample detecting.
Description
Technical field
The utility model relates to a kind of gas leak detection equipment more particularly to a kind of detect sensitive high one-component and continuously examine
Leakage system.
Background technique
With the development of manufacturing technology, the performance of all kinds of accurate devices such as engine, pressure vessel, valve, pipeline etc. is wanted
Ask higher and higher, and the air-tightness of device is to influence one of properties of product and the key element in service life.Therefore, manufacture and
Measuring error field, leak hunting technology are very crucial.
Leak hunting technology is broadly divided into sniff formula and diffusion type, since diffusion type leak hunting method response speed is relatively slow, low efficiency,
Therefore using less in industrial automation production.Sniff formula leak hunting technology can timely and accurately detect quick in sample gas
The content for feeling gas part, is applied in practical leak detection operation, and when there is leakage, search gas can be overflowed from leak hole or crack,
To influence the gas component on periphery.Detector is by detect simultaneously analysis detection result to acquisition sample gas.
Traditional sniff formula leak hunting technology uses helium as search gas, using mass spectrograph as detector.Helium detecting method is deposited
In search gas valuableness and need to create vacuum in checking matter body to allow to operate mass spectrometric disadvantage.Therefore, in recent years
Hydrogen inspection technology is gradually widely applied in industrial automation production, using 5% nitrogen and hydrogen mixture as search gas cost performance
It is relatively high, it can effectively save cost.But current hydrogen detecting method is lower relative to helium inspection sensitivity, and in industry spot
Middle environment background constituents are more complicated and unstable, cause detection error is big, stability is poor, vulnerable to environmental disturbances.
Summary of the invention
In order to solve the above-mentioned technical problem the utility model, provides a kind of continuous leak detection system of one-component, mixed with nitrogen hydrogen
Gas to be closed as search gas, there is highly sensitive response to one-component hydrogen, detection response is fast, it is able to achieve continuous automatic inspection,
Easy to operate, not vulnerable to environmental disturbances, detection is accurate, and leak source analyzing and positioning is accurate.
Above technical problems of the utility model are mainly solved by the following technical scheme: the utility model packet
Include sample detecting probe, connector, flow sensor, surge tank, sampling air pump and governor circuit, the outlet of sample detecting probe
Mouth, connector, flow sensor, surge tank and sampling air pump are sequentially connected composition measurement gas circuit, the signal of sample detecting probe
Output end is connected through connector with the governor circuit, and flow sensor, sampling air pump are connected with governor circuit respectively.Master control
Circuit control flow sensor, the operation for sampling air pump.Sample detecting probe, connector, flow sensor, surge tank and sampling
Air pump is sequentially connected composition measurement gas circuit, sampling air pump work, and flow sensor controls sampling flow and stablizes, and gas enters sampling
Detection probe has only to the sensor of hydrogen sensitive in sample detecting probe, and the transducing signal of acquisition is conveyed to connector, through connecting
Device switching is conveyed to governor circuit and is handled, the detection knot for finally showing tested gas concentration by display screen and whether leaking
Fruit.The utility model has highly sensitive response, detection response using nitrogen hydrogen mixeding gas as search gas, to one-component hydrogen
Fastly, it is able to achieve continuous automatic inspection, easy to operate, not vulnerable to environmental disturbances, detection is accurate, and leak source analyzing and positioning is accurate.
Preferably, the connector is a gas circuit boat for not only having had gas piping adapter but also having had electrode adapter
Empty connector.Connector can connect gas piping but also connection electrode and conducting wire.
Preferably, the sample detecting probe including handle with interior cavity and is respectively arranged on handle front end, rear end
Probe pipe and probe wire, the front end of handle cavity is equipped with dirt catcher, is equipped with gas sensor, probe wire packet in the cavity of handle
It includes casing and tracheae and conducting wire in casing, one end of tracheae is connected with the rear end of handle cavity, one end of conducting wire is gentle
Dependent sensor is connected, and the other end of tracheae and the other end of conducting wire are connected with the connector respectively.Dirt catcher is for filtering
Dust particles in gas, avoid enter into gas sensor, play a protective role to gas sensor.Gas sensor is only
To the sensor of hydrogen sensitive.Probe line length can be adjusted according to use demand, and mobile sample detecting probe, has when convenient for measurement
Conducive to sample detecting probe proximity test workpiece.
Preferably, the gas sensor includes shell and the air-sensitive film being set in the housing, the front end of shell, after
End is respectively equipped with the air inlet pipe and an air outlet pipe vertical with air-sensitive film, and air-sensitive film is palladium-nickel alloy that monocrystalline silicon surface is coated with
Film and incude figure in grid, air-sensitive film with a thickness of 300~400nm, connect and survey on the pin that air-sensitive film is drawn
Electrode is measured, measuring electrode is connected with the conducting wire in the probe wire.Gas sensor is a kind of only to the single of hydrogen sensitive
Component gas sensor, air-sensitive film utilizes the quick characteristic of hydrogen of palldium alloy, when hydrogen is attached to air-sensitive film surface, occurs with palladium
Reaction is distorted film lattice, and the electron mobility of air-sensitive film is caused to change, by the electricity for measuring air-sensitive film
Transport factor can incude the density of hydrogen in gas.Air-sensitive film is coated with palladium-nickel in monocrystalline silicon surface using vapour deposition process
Alloy firm prepares to form grid induction figure by nano photolithography.Filamentary silver measuring electrode is connected at air-sensitive film pin, is used
In the physical change amount of detection air-sensitive film, measuring electrode is connected with the conducting wire in probe wire, is used for transmission inductive signal.
Preferably, the probe pipe is an optionally rotated curved bellows.The front end of probe pipe is taper
Pipe.Pop one's head in pipe can any angle bending, expand detectable range, convenient for operation, be conducive to pop one's head in pipe air inlet close to inspection
Survey workpiece, alignment detection position.
Preferably, embedded with a circle police instruction light bar, police instruction light bar and the probe on the handle
Conducting wire in line is connected.Alarm lamp is connected by probe wire with governor circuit, and when a leak is detected, governor circuit issues
Signal lights alarm lamp band, reminds testing staff in time.
Preferably, the continuous leak detection system of the one-component includes three-way magnetic valve and blowback air pump, threeway electromagnetism
Valve is located between the connector and flow sensor, the common port and normally open of three-way magnetic valve respectively with connector, stream
Quantity sensor is connected, and the normally closed port of three-way magnetic valve is connected with blowback air pump, and three-way magnetic valve, blowback air pump are electric with master control respectively
Road is connected.Governor circuit controls the operation of three-way magnetic valve, blowback air pump, changes gas circuit conducting direction by three-way magnetic valve.
When measurement, three-way magnetic valve is connected to connector and flow sensor；When cleaning, three-way magnetic valve is connected to connector and blowback air
Pump, blowback air pump, three-way magnetic valve, connector and sample detecting probe constitute blowback and clean gas circuit, blowback air pump work, gas
Entered in sample detecting probe by blowback air pump by connector and blown out again from the front end that sample detecting is popped one's head in, reaches cleaning gas circuit
Purpose, also accelerate sample detecting probe in gas sensor recovery, improve the accuracy and anti-interference of subsequent detection.
Preferably, the governor circuit include central processing unit, driving unit, signal processing unit and it is man-machine mutually
Telephone unit, driving unit, signal processing unit and man-machine mutual telephone unit are connected with central processing unit respectively, signal processing unit
It is connected through the connector with the signal output end that the sample detecting is popped one's head in, driving unit is passed with the flow respectively
Sensor, sampling air pump, three-way magnetic valve and blowback air pump are connected.Central processing unit is the core of governor circuit, passes through driving
The operation that unit controls flow sensor, samples air pump, three-way magnetic valve and blowback air pump.Man-machine mutual telephone unit is using touch
Liquid crystal display.Signal processing unit includes signal multistage amplifier circuit and background noise eliminates circuit, signal multistage amplification electricity
Road is that the inductive signal for the gas sensor for carrying out probe wire transmission carries out three-level amplification, filtering, and transmits signals to center
Threshold-discrimination module in processing unit；It is that real-time tracking detection air-sensitive passes in a manner of following detection that background noise, which eliminates circuit,
The background signal of sensor, and the noise in environmental background is eliminated to follow signal as base value before gas sensor detection.Threshold
It is worth determination module according to amplified signal and background signal, is shown by processing analysis output test result value to display screen.
When testing result is more than the limit value of setting, central processing unit issues signal and lights alarm lamp band, and on a display screen
Display alarm information and alarm pattern remind detection staff to leak.
The beneficial effects of the utility model are: by the handle type sample detecting probe of mobile built-in gas sensor, benefit
With air-sensitive film to the selectivity of one-component hydrogen, hydrogen gas leakage concentration is measured, wide, the movement side with detection angles
Just, the characteristics of high sensitivity, fast response time.Gas circuit is cleaned using measurement gas circuit and blowback, is sentenced automatically by concentration and noise
Blowback cleaning gas circuit is opened in disconnection, and high degree of automation, environment interference is strong, improves detection efficiency, meets industry spot company
The continuous demand quickly detected.
Detailed description of the invention
Fig. 1 is a kind of system connection block diagram of the utility model.
Fig. 2 is a kind of schematic perspective view that sample detecting is popped one's head in the utility model.
Fig. 3 is a kind of schematic perspective view of gas sensor in the utility model.
Fig. 4 is a kind of circuit theory connection block diagram of governor circuit in the utility model.
1. sample detectings are popped one's head in figure, 2. connectors, 3. flow sensors, 4. surge tanks, and 5. sampling air pumps, 6. 3 are powered
Magnet valve, 7. blowback air pumps, 11. handles, 12. probe pipes, 13. probe wires, 14. dirt catchers, 15. gas sensors, 16. shells,
17. air-sensitive film, 18. air inlet pipe, 19. escape pipes, 20. measuring electrodes, 21. police instruction light bar, 81. central processing unit,
82. driving unit, 83. signal processing units, 84. man-machine mutual telephone units.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: a kind of continuous leak detection system of one-component of the present embodiment, as shown in Figure 1, including that sample detecting is popped one's head in
1, connector 2, flow sensor 3, surge tank 4, sampling air pump 5, three-way magnetic valve 6, blowback air pump 7 and governor circuit.Sampling
Detection probe, connector, three-way magnetic valve, flow sensor, surge tank and sampling air pump, which are sequentially connected, constitutes measurement gas circuit, and three
The common port and normally open of three-way electromagnetic valve are connected with connector, flow sensor respectively, when measurement, three-way magnetic valve connection connection
Device and flow sensor；The normally closed port of three-way magnetic valve is connected with blowback air pump, when three-way magnetic valve is connected to blowback air pump and company
When connecing device, blowback air pump, three-way magnetic valve, connector and sample detecting probe constitute blowback and clean gas circuit, and blowback air pump is opened,
Gas circuit work is cleaned in blowback, to purify measurement gas circuit, is accelerated gas sensor and is restored, flow is 300~400ml/min.Sampling
The signal output end of detection probe is connected through connector with governor circuit, and flow sensor, three-way magnetic valve sample air pump, are anti-
Blower pump is connected with governor circuit respectively.
Connector 2 is a gas circuit Aviation Connector for not only having gas piping adapter but also have electrode adapter, this implementation
Connector is the four core Aviation Connectors that can connect gas piping but also connection electrode in example.As shown in Figure 2 and Figure 3, sampling inspection
Probing head 1 includes the handle 11 that there is cylindrical cavity in inside, diameter 30mm, the 300~400mm of length of handle, handle front end
Be connected with probe pipe 12, probe pipe be a diameter 10mm, length be 250~300mm can any angle turn to curved wave
Line pipe, the front end for pipe of popping one's head in are conical pipe, dirt catcher 14 are housed between probe pipe and handle cavity, for filtering the ash in gas
Dirt particulate matter, material are the polyester cellulose fiber filter membrane in 0.22~0.45 μm of aperture, diameter 8mm, and handle rear end is connected with probe wire
13, probe line length is generally 1~3 meter, can adjust according to use demand, sample detecting probe easy to remove, it is ensured that sampling inspection
Probing head proximity test workpiece.The front of handle cavity is equipped with the only gas sensor 15 to hydrogen sensitive, gas sensor
Including shell 16 and it is installed on the intracorporal air-sensitive film 17 of shell, front end, the rear end of shell are connected with vertical with air-sensitive film respectively
Air inlet pipe 18 and escape pipe 19, air-sensitive film are the palladium-nickel alloy film being coated with using vapour deposition process in monocrystalline silicon surface, gas
Sensitive film with a thickness of 300~400nm, prepared by nano photolithography to be formed single line width be 0.7mm grid incude
Figure.Measuring electrode 20 is connected on two pins that air-sensitive film is drawn.Probe wire 13 includes casing and the gas in casing
Pipe and conducting wire, one end of tracheae are connected with the rear end of handle cavity, and one end of conducting wire is protruded into handle cavity and and air-sensitive film
On two measuring electrodes be connected, the other end of the other end of tracheae and conducting wire respectively with tracheae adapter, the electricity on connector
Pole adapter is connected, and the tracheae adapter on connector is connected with the common port of three-way magnetic valve again, and the electrode on connector turns
Connector is connected with governor circuit again.The transparent ring of a circle is also embedded on handle at gas sensor, built-in circle alarm refers to
Show light bar 21, police instruction light bar and to be drawn out to sample detecting probe by the conducting wire in probe wire outer, and with governor circuit phase
Even.
Surge tank is the cuboid of a volume 200ml, and there are air inlet and air outlet in two sides respectively, for slow down it is longer compared with
Air-flow vortex in thin tracheae, avoids sensor drift caused by air-flow.Flow sensor precise measurement flows through endotracheal stream
Amount, and stability of flow is controlled in 99.0~101.0ml/min, guarantee that gas comes into full contact with the air-sensitive film in gas sensor
Reaction.
As shown in figure 4, governor circuit includes central processing unit 81, driving unit 82, signal processing unit 83 and man-machine
Mutual telephone unit 84, driving unit, signal processing unit and man-machine mutual telephone unit are connected with central processing unit respectively, signal processing
Unit is connected with the electrode adapter on connector, driving unit respectively with flow sensor, sampling air pump, three-way magnetic valve and
Blowback air pump is connected.Man-machine mutual telephone unit uses touch LCD screen.Signal processing unit includes signal multistage amplification electricity
Road and background noise eliminate circuit, signal multistage amplifier circuit be the gas sensor for carrying out probe wire transmission inductive signal into
The amplification of row three-level, filtering, and transmit signals to the threshold-discrimination module in central processing unit；Background noise eliminates circuit
The background signal of real-time tracking detection gas sensor in a manner of following detection, and to follow letter before gas sensor detection
Number be used as base value, eliminate environmental background in noise.Threshold-discrimination module is according to amplified signal and background signal, by processing point
Analysis output test result value is shown to display screen.When testing result is more than the limit value of setting, central processing unit is issued
Signal lights alarm lamp band, and display alarm information and alarm pattern on a display screen, and prompting detects staff
Leakage.
Leak detection process: central processing unit sends a signal to driving unit, controlled respectively by driving unit flow sensor,
Sample the work of air pump, three-way magnetic valve and blowback air pump；
When measurement, three-way magnetic valve is connected to connector and flow sensor, sample detecting probe, connector, flow sensing
Device, surge tank and sampling air pump are sequentially connected composition measurement gas circuit, and sampling air pump work controls sample streams by flow sensor
Amount is stablized, and gas enters sample detecting probe, and enters gas sensor, and air-sensitive film contacts generation induction letter with gas attachment
Number, connector is conveyed to by measuring electrode and probe wire, is conveyed to signal processing unit again through connector switching, after processing
Central processing unit is sent to be handled, last testing result send display screen to show, once detect gas leakage, central processing
Unit issues signal and lights alarm lamp band, and display alarm information and alarm pattern on a display screen, reminds detection work
Personnel leak；
When cleaning, three-way magnetic valve is connected to blowback air pump and when connector, blowback air pump, three-way magnetic valve, connector and
Sample detecting probe constitutes blowback and cleans gas circuit；If central processing unit analysis after know the density of hydrogen detected it is higher or
The noise that background noise eliminates circuit is smaller, then starts blowback cleaning gas circuit and carry out gas circuit cleaning, blowback air pump work, gas
Entered in sample detecting probe by blowback air pump by connector and blown out again from the front end that sample detecting is popped one's head in, reaches cleaning gas circuit
Purpose, accelerate gas sensor restore, flow be 300~400ml/min；The background noise of signal processing unit eliminates circuit
Tracing detection, when signal-to-noise ratio reaches certain value, blowback cleaning gas circuit stops working.
The utility model using highly sensitive hydrogen sensitive film sensor as leak detection sensor, it is higher to the sensitivity of hydrogen,
And alkanes, hydrocarbon gas are not responding to, so that system has stronger anti-interference, acquisition gas is controlled using current stabilization module
Flow velocity improves the response time so that gas comes into full contact with gas sensor, is measured using blowback cleaning gas circuit Rapid Cleaning
Gas circuit realizes the fast quick-recovery of gas sensor, detection efficiency is greatly improved, while extending the service life of gas sensor, meets
Environment interference resistance is strong in industry spot, detects quick demand.
Claims (6)
1. a kind of continuous leak detection system of one-component, it is characterised in that including sample detecting probe, connector, flow sensor,
Surge tank, sampling air pump and governor circuit, gas outlet, connector, flow sensor, surge tank and the sampling of sample detecting probe
Air pump is sequentially connected composition measurement gas circuit, and the signal output end of sample detecting probe is through connector and the governor circuit phase
Even, flow sensor, sampling air pump are connected with governor circuit respectively.
2. the continuous leak detection system of a kind of one-component according to claim 1, it is characterised in that the sample detecting is visited
Head includes handle with interior cavity and the probe pipe and probe wire that are respectively arranged on handle front end, rear end, and the front end of handle cavity is set
There is dirt catcher, is equipped with gas sensor in the cavity of handle, probe wire includes casing and tracheae and conducting wire in casing, gas
One end of pipe is connected with the rear end of handle cavity, and one end of conducting wire is connected with gas sensor, the other end of tracheae and conducting wire
The other end is connected with the connector respectively.
3. the continuous leak detection system of a kind of one-component according to claim 2, it is characterised in that the gas sensor
Including shell and the air-sensitive film being set in the housing, front end, the rear end of shell are respectively equipped with the air inlet pipe vertical with air-sensitive film
And escape pipe, air-sensitive film are palladium-nickel alloy film that monocrystalline silicon surface is coated with and incude figure in grid, air-sensitive film
With a thickness of 300~400nm, measuring electrode is connected on the pin that air-sensitive film is drawn, in measuring electrode and the probe wire
Conducting wire is connected.
4. the continuous leak detection system of a kind of one-component according to claim 2 or 3, it is characterised in that the probe pipe
Front end is conical pipe, and probe pipe is an optionally rotated curved bellows.
5. the continuous leak detection system of a kind of one-component according to claim 1, it is characterised in that including three-way magnetic valve and
Blowback air pump, three-way magnetic valve are located between the connector and flow sensor, the common port of three-way magnetic valve and normally opened
Mouthful be connected respectively with connector, flow sensor, the normally closed port of three-way magnetic valve is connected with blowback air pump, three-way magnetic valve, instead
Blower pump is connected with governor circuit respectively.
6. the continuous leak detection system of a kind of one-component according to claim 5, it is characterised in that the governor circuit packet
Include central processing unit, driving unit, signal processing unit and man-machine mutual telephone unit, driving unit, signal processing unit and people
The mutual telephone unit of machine is connected with central processing unit respectively, and signal processing unit is visited through the connector and the sample detecting
The signal output end of head is connected, driving unit respectively with the flow sensor, sampling air pump, three-way magnetic valve and blowback air
Pump is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821885384.XU CN209102291U (en) | 2018-11-15 | 2018-11-15 | A kind of continuous leak detection system of one-component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821885384.XU CN209102291U (en) | 2018-11-15 | 2018-11-15 | A kind of continuous leak detection system of one-component |
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| Publication Number | Publication Date |
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| CN209102291U true CN209102291U (en) | 2019-07-12 |
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| CN201821885384.XU Active CN209102291U (en) | 2018-11-15 | 2018-11-15 | A kind of continuous leak detection system of one-component |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285930A (en) * | 2018-11-15 | 2019-09-27 | 杭州超钜科技有限公司 | The continuous leak detection system of one-component and its leak hunting method |
| CN110487886A (en) * | 2019-09-11 | 2019-11-22 | 北京圣通和科技有限公司 | Air ion detector and its calibration method |
| WO2022219674A1 (en) * | 2021-04-12 | 2022-10-20 | Ｑ’ｚ株式会社 | Hydrogen leak detector |
-
2018
- 2018-11-15 CN CN201821885384.XU patent/CN209102291U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285930A (en) * | 2018-11-15 | 2019-09-27 | 杭州超钜科技有限公司 | The continuous leak detection system of one-component and its leak hunting method |
| CN110487886A (en) * | 2019-09-11 | 2019-11-22 | 北京圣通和科技有限公司 | Air ion detector and its calibration method |
| WO2022219674A1 (en) * | 2021-04-12 | 2022-10-20 | Ｑ’ｚ株式会社 | Hydrogen leak detector |
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