CN206311471U - Smokemeter - Google Patents
Smokemeter Download PDFInfo
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- CN206311471U CN206311471U CN201621455865.8U CN201621455865U CN206311471U CN 206311471 U CN206311471 U CN 206311471U CN 201621455865 U CN201621455865 U CN 201621455865U CN 206311471 U CN206311471 U CN 206311471U
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- air curtain
- smokemeter
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- air
- differential pressure
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Abstract
The utility model is related to a kind of smokemeter.Smokemeter of the present utility model includes controller and the differential pressure pickup for detecting the difference of the malleation value in inlet channel of the negative pressure value with air curtain that air-flow to be measured causes in signalling channel, controller can control the flow of gas outlet to make the pressure difference at differential pressure pickup two ends be zero according to the signal of differential pressure pickup, clean air so in air curtain reaches dynamic equilibrium with the negative pressure that under test gas cause at isolation window, the clean air in air curtain is set just to make up the negative pressure that gas to be detected causes, realize that the flow of air curtain is adjustable, avoid air curtain flow excessive or too small generation harmful effect.
Description
Technical field
The utility model is related to a kind of smokemeter.
Background technology
The Cleaning Principle of smokemeter typically using optical method detection or supercritical ultrasonics technology detection, is examined to dusty circumstances
During survey, the dust in environment can be polluted to the detecting element of smokemeter, have a strong impact on the life-span of certainty of measurement and instrument.
The method for also having some smokemeters that air curtain is set between detecting element and gas to be detected in the prior art come every
From detecting element, such as the Chinese patent Shen that application publication number is the A of CN 105092440, Shen Qing Publication day is 2015.11.25
Please a kind of disclosed multifunction laser gas and dust on-line checking analyzer, the analyzer is smokemeter, the smokemeter bag
Instrument body is included, instrument body is provided with the gas channel under test gas circulation, and the both sides of gas channel are relative to be provided with inspection
Device transmitting-receiving subassembly is surveyed, detector transmitting-receiving subassembly includes generating laser and laser pickoff in the smokemeter, in Laser emission
The signalling channel arranged in a crossed manner with gas channel is provided between device and laser pickoff, in gas channel and two in signalling channel
Isolation window is respectively equipped between detector transmitting-receiving subassembly, the outlet of purge gass is located at two isolation windows near the one of gas channel
Side, gas forms air curtain after purge gass outlet outflow at isolation window, and the air curtain can make up air-flow to be measured at isolation window
The negative pressure of formation, makes at isolation window full of clean air, so makes isolation window and gas to be detected mutually isolated, prevents isolation window
It is contaminated, but after smokemeter sets air curtain, if the flow in air curtain is excessive, excessive air can be made to be mixed into gas to be detected
In body, large effect is caused to testing result, if the flow of air curtain is too small, suitable isolation effect is not reached again.
Utility model content
The purpose of this utility model is to provide a kind of self-adjustable smokemeter of air curtain flow.
To achieve the above object, smokemeter of the present utility model is adopted the following technical scheme that：Smokemeter, including it is provided with air-flow
The instrument body of passage and the detector transmitting-receiving subassembly of gas channel both sides is respectively arranged on, instrument body is also in two detectors
It is provided between transmitting-receiving subassembly in the signalling channel arranged in a crossed manner with gas channel, signalling channel in gas channel and two detectors
Isolation window is respectively equipped between transmitting-receiving subassembly, air curtain outlet is provided with the inwall of signalling channel between isolation window and gas channel
Mouthful, smokemeter is also included for detecting in inlet channel of the negative pressure value with air curtain that air-flow to be measured causes in signalling channel just
The differential pressure pickup of the difference of pressure value, the differential pressure pickup is connected with the pressure difference signal control air curtain gas outlet fed back according to it
Flow so that the pressure difference that differential pressure pickup is measured is zero controller.
Electrically-controlled valve is installed, the controller is connected and controls with electrically-controlled valve on the air inlet pipeline that air curtain gas outlet is connected
The aperture of electrically-controlled valve.
The gas channel is venturi passage, and the signalling channel is intersected with the throat of venturi passage.
Signalling channel is provided with necking section of the osculum towards gas channel between isolation window and gas channel.
The instrument body includes being provided with the middle matrix of " ten " font passage, and the vertical section of " ten " font passage constitutes institute
Gas channel is stated, the two ends of the horizontal segment of " ten " font passage are provided with joint, and joint has the inner chamber of left and right insertion, joint
Inner chamber and horizontal segment passage collectively form the signalling channel, and the isolation window and air curtain gas outlet are arranged in joint inner chamber.
The differential pressure pickup is differential pressure transmitter.
The beneficial effects of the utility model are：Smokemeter of the present utility model includes controller and for detecting air-flow to be measured
The differential pressure pickup of the difference of the malleation value in the negative pressure value and the inlet channel of air curtain that cause in signalling channel, controller energy
It is enough to control the flow of gas outlet to make the pressure difference at differential pressure pickup two ends be zero according to the signal of differential pressure pickup, in such air curtain
The negative pressure that causes at isolation window of clean air and under test gas reach dynamic equilibrium, the clean air in air curtain just can
The negative pressure that gas to be detected causes enough is made up, realizes that the flow of air curtain is adjustable, it is to avoid air curtain flow is excessive or too small generation
Harmful effect；
Further, electrically-controlled valve, the controller and electrically-controlled valve are installed on the air inlet pipeline that air curtain gas outlet is connected
The aperture of electrically-controlled valve is connected and controls, this control mode is simple, low cost；
Further, gas channel venturi passage, signalling channel is intersected with the throat of venturi passage, venturi passage
The negative pressure that air-flow to be detected causes in signalling channel can be strengthened, can thus strengthen the flow of air curtain, enhancing air curtain every
From effect；
Further, signalling channel is provided with necking section of the osculum towards gas channel between isolation window and gas channel,
So there are certain guide functions to the air-flow in air curtain；
Further, the instrument body includes being provided with middle the matrix of " ten " font passage, and " ten " font passage is erected
Straight section constitutes the gas channel, and the two ends of the horizontal segment of " ten " font passage are provided with joint, and joint has left and right insertion
Inner chamber, the inner chamber of joint and horizontal segment passage collectively form the signalling channel, and the isolation window and air curtain gas outlet are arranged on
In joint inner chamber, each part of instrument body is so set to process simple, it is easy to assembly；
Further, the differential pressure pickup is differential pressure transmitter, and such measurement result is accurately and reliably.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of smokemeter of the present utility model；
In accompanying drawing：1st, differential pressure transmitter；2nd, laser；3rd, flow control valve；4th, joint；5th, lens；6th, middle matrix；7、
Optically focused mirror assembly；8th, laser detector；9th, air pump；41st, necking section；61st, gas channel；62nd, signalling channel.
Specific embodiment
Implementation method of the present utility model is described further below in conjunction with the accompanying drawings.
The specific embodiment of smokemeter of the present utility model, as shown in figure 1, smokemeter includes instrument body, instrument body
Including middle matrix 6, middle matrix 6 is provided with " ten " font passage, and the vertical section of " ten " font passage is for for be detected
The gas channel 61 that air-flow passes through, gas channel 61 is venturi passage, so in airflow, can be in venturi passage
Throat location produce the larger negative pressure of pressure value.The horizontal segment of " ten " font passage is intersected in venturi and leads to gas channel
The throat location in road, the two ends of horizontal segment passage are fitted with joint 4, joint 4 with necking section 41, necking section 41 it is small
Mouthful towards gas channel 61, the end of big mouth is provided with lens 5, and lens 5 are set with the sealing everywhere of the inner chamber of joint 4, formed every
From under test gas and the isolation window of detector module.The horizontal segment of " ten " font passage of two inner chambers of joint 4 and middle matrix
Channel connection, forms the signalling channel 62 for passing through for detection signal.The both sides of signalling channel 62 are provided with detector transmitting-receiving group
Part, detector transmitting-receiving subassembly is the laser 2 set in the outside of the lens 5 in the left side of signalling channel 62, and right side is saturating
The optically focused mirror assembly 7 being orderly arranged outside each and laser detector 8 of mirror 5.The CPU of laser 2 and laser detector 8 and instrument
Connection, the laser that laser 2 sends when using from signalling channel through and past after optically focused mirror assembly 7 by laser detector 8
Receive.
The air curtain air outlet for being blown out for clean air and forming air curtain is equipped with two joints 4, air curtain air outlet is located at contracting
On the inwall of mouth section at the position of lens 5, air pump 9 is connected on joint 4 by pipeline and is connected with air curtain air outlet.Stream
Adjustable valve 3 is electrically-controlled valve, and flow control valve 3 is located in the inlet channel of air curtain.The low-pressure end of differential pressure transmitter 1 passes through pipeline
Necking section with joint 4 is connected, and high-pressure side is connected on the pipeline in the downstream of flow control valve 3 by pipeline, and such differential pressure becomes
Send negative pressure value and air curtain in the necking section that device 1 can just measure joint 4 inlet channel malleation value between difference.Stream
The control circuit of adjustable valve 3 and differential pressure transmitter 2 is connected with the CPU of instrument, detections of such CPU according to differential pressure transmitter
Signal controls the aperture of flow control valve 3, makes to become big by the flow of the air of flow control valve 3 or diminishes.
When smokemeter of the present utility model is detected, air-flow to be detected flows from gas channel, in venturi passage
In the presence of throat produce negative pressure, so make joint necking section in also produce negative pressure, CPU is detected by differential pressure transmitter
Negative pressure value is more than the malleation value of the inlet channel of air curtain in tapered channel, and CPU sends signal control flow control valve opening and becomes big,
The flow of air curtain is set to become big, such air curtain diminishes into negative pressure value after necking section, and then differential pressure transmitter is detected simultaneously herein
Detection signal is passed into CPU, until the detected value of differential pressure transmitter is zero, the now clean air in the inlet channel of air curtain
The negative pressure that air-flow to be detected causes can be just made up, due to being full of clean air all the time in necking section, is avoided to be detected
Gas is spread along signalling channel, and lens are polluted, and CPU realizes air curtain flow by differential pressure transmitter and flow control valve
Dynamic adjustment, it is to avoid air curtain flow clean air excessive when excessive is mixed into gas channel, causes larger to testing result
Influence, it also avoid air curtain flow it is excessive when air curtain isolation effect difference problem.Due to the gas of the smokemeter of utility model
The negative pressure that curtain flow can cause according to air-flow to be detected is entered Mobile state and is adjusted, influence very little of the air curtain to testing result, therefore
Smokemeter of the present utility model can be to ultralow range dust concentration（0~5mg/ m3）Gas detected.
In the above-described embodiments, differential pressure transmitter is constituted for detecting that it is negative that air-flow to be measured causes in detection signal passage
The differential pressure pickup of the difference of the malleation value in the inlet channel of pressure value and air curtain, can also use other in other embodiments
The detection that the differential pressure pickup of type is carried out；Controller is adjusted by flow control valve to the flow of air curtain, be can also be without
Flow control valve is set, the regulation of air curtain flow is carried out by controlling the power of air pump；Gas channel is set into venturi to lead to
Road is, in order to strengthen the negative pressure value that air-flow to be detected causes in signalling channel, the flow of air curtain is also accordingly increased,
The isolation effect of air curtain is improved, gas channel cylindrical channel can also be set in other embodiments certainly；Joint
Inner chamber be set to the inner chamber of taper, making the inner chamber of joint has certain guide functions, in other embodiments, it is also possible to will
The inner chamber of joint is set to plain cylindrical form inner chamber；Smokemeter is used to detect the detector emitting module and reception group of dust concentration
Part is respectively laser and laser detector, so makes testing result accurate, certainly in other embodiments, can also be using super
Sonic detection component or other detection components as smokemeter detector.
Claims (6)
1. smokemeter, including be provided with the instrument body of gas channel and be respectively arranged on the detector transmitting-receiving group of gas channel both sides
Part, instrument body is also provided with the signalling channel arranged in a crossed manner with gas channel between two detector transmitting-receiving subassemblies, and signal leads to
Isolation window is respectively equipped between gas channel and two detector transmitting-receiving subassemblies in road, in isolation window on the inwall of signalling channel
Air curtain gas outlet is provided with and gas channel between, it is characterised in that：Smokemeter is also included for detecting that air-flow to be measured is logical in signal
The differential pressure pickup of the difference of the malleation value in the negative pressure value and the inlet channel of air curtain that cause in road, the differential pressure pickup connects
It is connected to the pressure difference signal fed back according to it and controls the flow of air curtain gas outlet so that the pressure difference that differential pressure pickup is measured is zero
Controller.
2. smokemeter according to claim 1, it is characterised in that：It is provided with the air inlet pipeline that air curtain gas outlet is connected
Electrically-controlled valve, the controller is connected with electrically-controlled valve and controls the aperture of electrically-controlled valve.
3. smokemeter according to claim 1 and 2, it is characterised in that：The gas channel is venturi passage, the letter
Number passage intersects with the throat of venturi passage.
4. smokemeter according to claim 3, it is characterised in that：Signalling channel is provided between isolation window and gas channel
Necking section of the osculum towards gas channel.
5. smokemeter according to claim 3, it is characterised in that：The instrument body includes being provided with " ten " font passage
Middle matrix, the vertical section of " ten " font passage constitutes the gas channel, and the two ends of the horizontal segment of " ten " font passage are installed
There is joint, joint has the inner chamber of left and right insertion, and the inner chamber of joint and horizontal segment passage collectively form the signalling channel, described
Isolation window and air curtain gas outlet are arranged in joint inner chamber.
6. smokemeter according to claim 1 and 2, it is characterised in that：The differential pressure pickup is differential pressure transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621455865.8U CN206311471U (en) | 2016-12-28 | 2016-12-28 | Smokemeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621455865.8U CN206311471U (en) | 2016-12-28 | 2016-12-28 | Smokemeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206311471U true CN206311471U (en) | 2017-07-07 |
Family
ID=59247534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621455865.8U Active CN206311471U (en) | 2016-12-28 | 2016-12-28 | Smokemeter |
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| CN (1) | CN206311471U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655802A (en) * | 2017-10-17 | 2018-02-02 | 电子科技大学中山学院 | Optical principle dust sensor with function of preventing dust from entering |
| CN107677574A (en) * | 2017-11-03 | 2018-02-09 | 济南微纳颗粒仪器股份有限公司 | A kind of laser particle analyzer sample window |
| CN108802009A (en) * | 2018-08-24 | 2018-11-13 | 哈尔滨工业大学（威海） | A method of detecting heavy metal using plasma atomic emission spectrometer |
| CN108872080A (en) * | 2018-08-24 | 2018-11-23 | 哈尔滨工业大学（威海） | A kind of preceding light path system of plasma atomic emission spectrometer |
| CN115235963A (en) * | 2022-05-25 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Self-correcting linear air suction type smoke detector |
-
2016
- 2016-12-28 CN CN201621455865.8U patent/CN206311471U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655802A (en) * | 2017-10-17 | 2018-02-02 | 电子科技大学中山学院 | Optical principle dust sensor with function of preventing dust from entering |
| CN107677574A (en) * | 2017-11-03 | 2018-02-09 | 济南微纳颗粒仪器股份有限公司 | A kind of laser particle analyzer sample window |
| CN108802009A (en) * | 2018-08-24 | 2018-11-13 | 哈尔滨工业大学（威海） | A method of detecting heavy metal using plasma atomic emission spectrometer |
| CN108872080A (en) * | 2018-08-24 | 2018-11-23 | 哈尔滨工业大学（威海） | A kind of preceding light path system of plasma atomic emission spectrometer |
| CN108872080B (en) * | 2018-08-24 | 2022-03-04 | 哈尔滨工业大学（威海） | Front light path system of plasma atomic emission spectrometer |
| CN108802009B (en) * | 2018-08-24 | 2022-03-04 | 哈尔滨工业大学（威海） | Method for detecting heavy metal by using plasma atomic emission spectrometer |
| CN115235963A (en) * | 2022-05-25 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Self-correcting linear air suction type smoke detector |
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Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: Power Polytron Technologies Inc Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee before: Zhengzhou GL Tech Company |