CN207096098U - A kind of infrared leak detector of high accuracy - Google Patents
A kind of infrared leak detector of high accuracy Download PDFInfo
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- CN207096098U CN207096098U CN201720842747.0U CN201720842747U CN207096098U CN 207096098 U CN207096098 U CN 207096098U CN 201720842747 U CN201720842747 U CN 201720842747U CN 207096098 U CN207096098 U CN 207096098U
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- air
- boundling
- air pump
- leak detector
- high accuracy
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Abstract
It the utility model is related to a kind of infrared leak detector of high accuracy, including inlet duct, preposition air filtration buffer unit, front end air pump, infrared detecting device, rearmounted air-flow buffer device, the rearmounted air pump being sequentially communicated, sample gas is discharged after inlet duct, preposition air filtration buffer unit, infrared detecting device, rearmounted air-flow buffer device successively in the presence of front end air pump, rearmounted air pump.Inlet duct includes filter A, the air-breathing probe assembly B being sequentially communicated, preposition air filtration buffer unit includes filter C, the buffering boundling pipeline D being sequentially communicated, and rearmounted air-flow buffer device includes buffering boundling pipeline G, electronic flowmeter H, the voltage stabilizing boundling pipeline I being sequentially communicated.The utility model uses the equilibrium air pressure scheme designed before and after infrared detecting device to reduce measurement error, has the characteristics of measurement error is small, efficiency high.
Description
Technical field
A kind of infrared leak detector is the utility model is related to, more particularly to a kind of infrared leak detector of high accuracy, belongs to gas inspection
Leak instrument field.
Background technology
Infrared leak detector is the intelligence for accurate quick detection halogen gas, combustible refrigerant and SF6 quantity of gas leakages
Energy instrument, applied to refrigeration industry, air-conditioning, central heating industry, power industry.The sensor of existing leak detector include semiconductor-type,
Infrared type, ionization type.Semiconductor-type detecting element made of metal oxide or metal semiconductor oxide material is formed, with
Adsorption or reaction are produced when gas interacts, causes electrical conductivity or C-V characteristic or surface that carrier moving is characterized
Potential change and carry out gas concentration measurement.The deficiency of semiconductor-type sensors most importantly decays seriously, by external interference
Greatly, rate of false alarm is high, and the measurement range of linearity is smaller, easily influenced by ambient temperature etc..Infrared type is a kind of point based on gas with various
Minor structure is different, has selection absorption characteristic to the light of infrared spectrum specific wavelength, utilizes gas concentration and absorption intensity relation
(Lambert-Beer Lambert-Beer laws) identifies gas component and determines the gas sensing device of its concentration, be used for online
Formula gas detection equipment.The leak detector of infrared ray principle is unable to quick response, can only be used as environment real time monitoring.Ionization type is
Diode, heater strip, negative electrode, anode are made of platinum product, and anode launches cation after being heated silk heating, is received by negative electrode
Ion stream indicates after enhanced processing, and has sound equipment instruction, and electric part is by heating power supply, dc source, ion stream
Amplifier, output display and portable getter device power supply etc. form.Ionization type reaction speed is fast, ion caused by ionization
Amount repeatability is bad, and measurement accuracy is not high.
The test section of leak detector has two kinds of gas circuit patterns of suction-type and diffusion type, and diffusion type leak detector is commonly used to online reality
When monitor, the leak source that suction-type is applied to each part to be checked detects, and effect becomes apparent from.Leak detector general principle on existing market
It is to be acted on by suction of the air pump in rear end, the gas of detection mouth is sucked Instrument sensor, handled by sensor signal, it is defeated
Go out indices parameter.Such a scheme exists following clearly disadvantageous：(1) the pattern of single air pump causes instrument too to rely on air pump
Gettering ability, if air pump damage, instrument cannot normal work, made troubles to user；(2) single air pump suction pattern
The micro draught head of sensor side can be caused, the precision to leak detector detection brings influence, although can be mended by Data correction
Such error is repaid, but under varying environment temperature atmospheric pressure, the uniformity of above-mentioned compensation can not be guaranteed, the applicability of instrument
Reduce.
Utility model content
Infrared leak detector discloses new scheme to the utility model in high precision, using what is designed before and after infrared detecting device
Equilibrium air pressure scheme reduces measurement error, solves the problems, such as that existing like product has larger measurement error.
It is the utility model inlet duct that infrared leak detector includes being sequentially communicated in high precision, preposition air filtration buffer unit, preceding
Air pump, infrared detecting device, rearmounted air-flow buffer device, rearmounted air pump are held, sample gas is in front end air pump, the work of rearmounted air pump
Discharged successively after inlet duct, preposition air filtration buffer unit, infrared detecting device, rearmounted air-flow buffer device under.Enter
Device of air includes filter A, the air-breathing probe assembly B being sequentially communicated, and preposition air filtration buffer unit includes the filtering being sequentially communicated
Device C, buffering boundling pipeline D are buffering boundling pipeline G that rearmounted air-flow buffer device includes being sequentially communicated, electronic flowmeter H, steady
Press boundling pipeline I.
Further, the filter A of this programme inside is provided with dedusting component, and dedusting component includes some filtering net parts, filter
Activated carbon air filtration layer is provided between net means, dedusting component filters out the dust granules in sample gas.
Further, the air-breathing probe assembly B of this programme includes air inlet tubule boundling, and air inlet tubule boundling includes more air inlets
Tubule, sample gas are sucked by air inlet tubule boundling.
Further, the latus rectum of the air inlet tubule of this programme is 0.5mm.
Further, the filter C of this programme inside is provided with dry component, and dry component includes some filtering net parts, filter
It is provided between net means and absorbs moisture material, dry component filters out the moisture in sample gas.
Further, the buffering boundling pipeline D of this programme, buffering boundling pipeline G inside are provided with air-flow buffer column boundling,
Air-flow buffer column boundling includes the more air-flow buffer columns being interspersed in runner, and air-flow buffer column is by changing gas
Slow down the flow velocity of air-flow in the direction of stream.
Further, the voltage stabilizing boundling pipeline I of this programme includes degassing conduits boundling, and degassing conduits boundling includes more exhausts
Tubule, sample gas after degassing conduits boundling voltage stabilizing by discharging.
Further, the infrared leak detector of the high accuracy of this programme also includes air pump status real time monitor device, and air pump state is real
When monitoring device include air pump flow sensor, the flow that air pump status real time monitor device transmits according to air pump flow sensor
Abnormal information triggers alarm signal.
Infrared leak detector uses the equilibrium air pressure scheme designed before and after infrared detecting device to subtract to the utility model in high precision
Small measurement error, there is the characteristics of measurement error is small, efficiency high.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing infrared leak detector.
Fig. 2 is the schematic diagram of the infrared leak detector of the utility model.
Fig. 3 is the principle schematic diagram of infrared leak detector.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 2,3, the schematic diagram of the utility model infrared leak detector in high precision.The infrared leak detector of high accuracy include according to
It is the inlet duct of secondary connection, preposition air filtration buffer unit, front end air pump, infrared detecting device, rearmounted air-flow buffer device, rearmounted
Air pump, sample gas is in the presence of front end air pump, rearmounted air pump successively by inlet duct, preposition air filtration buffer unit, red
Discharged after outer detection means, rearmounted air-flow buffer device.Inlet duct includes filter A, the air-breathing probe assembly being sequentially communicated
B, preposition air filtration buffer unit include be sequentially communicated filter C, buffering boundling pipeline D, rearmounted air-flow buffer device include according to
Buffering boundling pipeline G, electronic flowmeter H, the voltage stabilizing boundling pipeline I of secondary connection.Such scheme is used before infrared detecting device
The equilibrium air pressure scheme designed afterwards reduces measurement error, employs 2 air pumps, and the air blowing of preposition air pump is accessed in the front end of sensor
Mouthful, the suction inlet of rearmounted air pump is accessed in the rear end of sensor, so as to balance the air pressure at sensor both ends, eliminates the mistake of measurement
Difference.
In order to further improve the precision of instrument detection, the pressure distribution of gas circuit is balanced, avoids appearance in gas circuit larger
Airflow fluctuation, this programme are improved on the basis of such scheme, specific as follows.In order to eliminate the dust in sample gas
Particle, this programme are provided with dedusting component in filter A inside, and dedusting component includes some filtering net parts, set between filtering net part
Active carbon filtration gas-bearing formation, dedusting component filter out the dust granules in sample gas.In order to coordinate the Flow-rate adjustment of air pump, this programme
Air-breathing probe assembly B include air inlet tubule boundling, air inlet tubule boundling includes more air inlet tubules, and sample gas passes through air inlet
Tubule boundling sucks.Further, the latus rectum of the air inlet tubule of this programme is 0.5mm.In order to eliminate the moisture in sample gas, with
And the irritative gas that part is unrelated, this programme are provided with dry component in filter C inside, dry component includes some filter screens
Part, it is provided between filtering net part and absorbs moisture material, dry component filters out the moisture in sample gas.In order to accumulate buffering sampling
Air-flow, this programme are provided with air-flow buffer column boundling in buffering boundling pipeline D, buffering boundling pipeline G inside, and air-flow buffer is stood
Post boundling includes the more air-flow buffer columns being interspersed in runner, and air-flow buffer column is subtracted by changing the direction of air-flow
Get a breathing space the flow velocity of stream.In order to stablize the stream condition of gas circuit back segment, the voltage stabilizing boundling pipeline I of this programme includes degassing conduits collection
Beam, degassing conduits boundling include more degassing conduits, and sample gas after degassing conduits boundling voltage stabilizing by discharging.In order to supervise in real time
The working condition of air pump is controlled, avoids air pump operation irregularity state from influenceing detection, the infrared leak detector of high accuracy of this programme also includes
Air pump status real time monitor device, air pump status real time monitor device include air pump flow sensor, air pump status real time monitor
The Traffic Anomaly information that device transmits according to air pump flow sensor triggers alarm signal.So it is easy to Field Force to find in time
Problem, fix a breakdown.
This programme discloses a kind of gas leakage detector applied in refrigeration industry, air-conditioning, central heating industry, power industry.
Consideration based on leak detector actual application environment is, it is necessary to have a both quick, and high accuracy, and can are steady in relatively adverse circumstances
Surely the leak detector to work.This programme uses the leak detector of infrared ray principle modes on the basis of original leak detector, and combines current
The technology that in the market generally possesses, which has been done, to be adopted and updates accordingly.The concrete structure of this programme includes filter A：Filter front end
The dust that device was used among air filtering, probe B：The fine duct of gas suction probe, internal diameter 0.5mm, filter C：With
Moisture in the tested gas of removal, and component environment internal stimulus gas, preceding column jecket D：Buffered for gas build, air pump
E：For accelerating forward end gas to suck, gas sensor F：The tested gas for eliminating dust and moisture is sent into gas sensor
In, conversion output electric signal, rear column jecket G after being detected using infrared principles：For absorbing the tested gas after gas sensor,
Electronic flowmeter H：Real-time output flow state, whether measurement air-flow is normal, gas cushion I：For eliminating the tested of suction
The pulsation phenomenon of gas, air pump J：Accelerate tested gas discharge.Filter A is nested on the front end component of probe B, filter C
Before being nested on column jecket D front end component, filter A, probe B belong to instrument External connecting part, referred to as instrument handle, probe B and
Connected between filter C using leimo modular connections, preceding column jecket D is connected with air pump E using the tetrafluoro flexible pipes of φ 4, and air pump E is gentle
Body sensor F is inserted pneumatic joint using φ 3 with rear column jecket G and connected soon, and rear column jecket G, electronic flowmeter H, gas cushion I are gentle
Connected between pump J using the tetrafluoro flexible pipes of φ 4.
Based on upper-part, this programme employs 2 air pumps, and the inflatable mouth of preposition air pump is accessed in the front end of sensor, passes
The suction inlet of rearmounted air pump is accessed in the rear end of sensor.Preposition air pump maximum coutroi velocity is 500ml/min, the maximum control of rearmounted air pump
Flow velocity processed is 2L/min, and probe handle part uses the thin tracheaes of 0.5mm, and prefilter buffer portion filtering moisture and part are pierced
Swash property gas.Front and rear air pump flow velocity is allowed to tend to balance by PWM regulations, so processing can preferably avoid gas in sensor cavity body
The fluctuation of stream, allowing in sensor cavity body has a stable detection environment (pressure difference reduction) relatively, has more to Instrument sensor
Stable response condition.Instrument is provided with air pump status real time monitor, avoids the damage of air pump and influences detection.It is special based on more than
Point, the infrared leak detector of high accuracy of this programme have substantive distinguishing features and progress compared to existing product.
The infrared leak detector of high accuracy of this programme is not limited to the content disclosed in embodiment, occurs in embodiment
Technical scheme can be extended based on the understanding of those skilled in the art, those skilled in the art are according to this programme with reference to known in
The simple alternative that general knowledge is made falls within the scope of this programme.
Claims (8)
1. a kind of infrared leak detector of high accuracy, it is characterized in that including the inlet duct, preposition air filtration buffer unit, preceding being sequentially communicated
Air pump, infrared detecting device, rearmounted air-flow buffer device, rearmounted air pump are held, sample gas is in the front end air pump, rearmounted air pump
In the presence of successively after the inlet duct, preposition air filtration buffer unit, infrared detecting device, rearmounted air-flow buffer device
Discharge；The inlet duct includes filter A, the air-breathing probe assembly B being sequentially communicated, and the preposition air filtration buffer unit includes
Filter C, the buffering boundling pipeline D being sequentially communicated, the rearmounted air-flow buffer device include the buffering bundle pipes being sequentially communicated
Road G, electronic flowmeter H, voltage stabilizing boundling pipeline I.
2. the infrared leak detector of high accuracy according to claim 1, it is characterised in that the inside of the filter A is provided with and removed
Dirt component, the dedusting component include some filtering net parts, activated carbon air filtration layer, the dedusting group are provided between the filtering net part
Part filters out the dust granules in sample gas.
3. the infrared leak detector of high accuracy according to claim 1, it is characterised in that the air-breathing probe assembly B include into
Gas tubule boundling, the air inlet tubule boundling include more air inlet tubules, and sample gas is sucked by the air inlet tubule boundling.
4. the infrared leak detector of high accuracy according to claim 3, it is characterised in that the latus rectum of the air inlet tubule is
0.5mm。
5. the infrared leak detector of high accuracy according to claim 1, it is characterised in that the inside of the filter C is provided with dry
Dry component, the dry component include some filtering net parts, are provided between the filtering net part and absorb moisture material, described dry group
Part filters out the moisture in sample gas.
6. the infrared leak detector of high accuracy according to claim 1, it is characterised in that the buffering boundling pipeline D, buffering collection
Beam tube road G inside is provided with air-flow buffer column boundling, and the air-flow buffer column boundling is interspersed in runner including more
In air-flow buffer column, the air-flow buffer column slows down the flow velocity of air-flow by changing the direction of air-flow.
7. the infrared leak detector of high accuracy according to claim 1, it is characterised in that the voltage stabilizing boundling pipeline I includes row
Gas tubule boundling, the degassing conduits boundling include more degassing conduits, and sample gas passes through the degassing conduits boundling voltage stabilizing
After discharge.
8. the infrared leak detector of high accuracy according to claim 1, it is characterised in that the infrared leak detector of high accuracy also wraps
Air pump status real time monitor device is included, the air pump status real time monitor device includes air pump flow sensor, the air pump shape
The Traffic Anomaly information that state real-time monitoring device transmits according to the air pump flow sensor triggers alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720842747.0U CN207096098U (en) | 2017-07-12 | 2017-07-12 | A kind of infrared leak detector of high accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720842747.0U CN207096098U (en) | 2017-07-12 | 2017-07-12 | A kind of infrared leak detector of high accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207096098U true CN207096098U (en) | 2018-03-13 |
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ID=61556522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720842747.0U Expired - Fee Related CN207096098U (en) | 2017-07-12 | 2017-07-12 | A kind of infrared leak detector of high accuracy |
Country Status (1)
| Country | Link |
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| CN (1) | CN207096098U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646362A (en) * | 2018-06-26 | 2020-01-03 | 浙江三花智能控制股份有限公司 | Method for detecting concentration of carbon dioxide in vehicle |
| CN113281292A (en) * | 2021-06-16 | 2021-08-20 | 广东电网有限责任公司 | Gas leakage detection device |
| US11187653B2 (en) | 2018-06-26 | 2021-11-30 | Hangzhou Sanhua Research Institute Co., Ltd. | Infrared sensor and infrared gas detector |
-
2017
- 2017-07-12 CN CN201720842747.0U patent/CN207096098U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646362A (en) * | 2018-06-26 | 2020-01-03 | 浙江三花智能控制股份有限公司 | Method for detecting concentration of carbon dioxide in vehicle |
| US11187653B2 (en) | 2018-06-26 | 2021-11-30 | Hangzhou Sanhua Research Institute Co., Ltd. | Infrared sensor and infrared gas detector |
| CN113281292A (en) * | 2021-06-16 | 2021-08-20 | 广东电网有限责任公司 | Gas leakage detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 Termination date: 20200712 |
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| CF01 | Termination of patent right due to non-payment of annual fee |