CN205157418U - Be used for engine exhaust measuring gas circuit system - Google Patents
Be used for engine exhaust measuring gas circuit system Download PDFInfo
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- CN205157418U CN205157418U CN201520820618.2U CN201520820618U CN205157418U CN 205157418 U CN205157418 U CN 205157418U CN 201520820618 U CN201520820618 U CN 201520820618U CN 205157418 U CN205157418 U CN 205157418U
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Abstract
The utility model provides a be used for engine exhaust measuring gas circuit system includes sampling unit, heating pipeline unit, measuring unit, current amount control means and the gas analysis unit connected in order on the trunk line, sampling unit includes sampling probe, sampling valve and solenoid valve, heating pipeline unit includes inner tube, hot air pipe and hot -air generator, governing valve, solenoid valve, pressure regulation filter valve and compressed air port, and measuring unit includes T type pipeline, photoelectricity receiving converter ware, light source and lens, and T type entrance is connected with the trunk line, and an export is connected with photoelectricity receiving converter ware and adjacent lens, another export and light source and another adjacent lens are connected. The utility model discloses can measure " ECE R24 " and multiple operating modes such as " ELR " in succession on line, CO, CO2, the HC composition of ability synchronous measurement diesel engine tail gas.
Description
Technical field
The utility model relates to measuring system, particularly relates to a kind of for detecting diesel motor exhaust smoke opacity and CO, CO
2, HC composition detection air-channel system.
Background technology
At present throughout the haze phenomenon of China's most area, city and rural environments are affected very large, to the healthy formation significant threat of the people.Motor vehicle exhaust emission is one of most regional air-polluting main cause, and wherein the exhaust emissions of diesel vehicle is important arch-criminal.Along with the continuous increase of China's automobile pollution, imperative to being rigid in checking up of exhaust gas from diesel vehicle discharge.
The appearance of the standards such as GB3847-2005, GB17691-2005, change smoke opacity measuring method in the past, require to adopt ELR working condition measuring to diesel motor smoke opacity, and the one-tenth of energy synchro measure diesel motor exhaust is grouped into, and domestic existing most of smoke opacity method emission test equipment are because of the deficiency in structure and principle, be difficult to meet new detection method completely, measurement data has larger error compared with external matured product.
Utility model content
In order to overcome existing defect, the utility model proposes a kind of air-channel system measured for motor exhaust.
The air-channel system that the utility model proposes comprises the sampling unit be linked in sequence be arranged on main pipeline, water back unit, measuring unit, flow controlling unit and gas analysis unit; Wherein,
The 4th solenoid valve that sampling unit comprises sampling probe, sampling valve and is connected with sampling valve, for connecting tail gas smoke discharging pipe, carries out the sampling of tail gas.
Preferably, sampling probe has the inclined-plane of 45 degree at head, outside have mark inclined-plane towards mark.
Preferably, sampling probe is welded by corrugated stainless steel tubing and stainless-steel tube, and corrugated stainless steel tubing has radiating effect, high-temperature tail gas temperature can be down in scope that rear class duct element can bear.
Further, smoke discharging pipe is installed the vertical coupling arrangement of flue, sampling probe enters smoke discharging pipe sampling through the vertical coupling arrangement of flue.This flue coupling arrangement can be added in the centre position of exhaust pipe road flat segments, by the direction that the inclined-plane of 45 degree, sampling probe head flows into towards flue gas stream, sampling probe vertically inserts in the vertical coupling arrangement of flue, and this device can adopt the form fixed sample probe of screw thread, welding, flange or clip; The degree of depth that sampling probe vertically inserts gas exhaust duct must make center, inclined-plane as far as possible close to gas exhaust duct center line.
Water back unit comprises interior pipe, warm-air pipe and the hot-air generator be connected in turn, flow speed control valve, the first solenoid valve, pressure regulation strainer valve and pressurized air port, interior pipe through warm-air pipe and and certain space, warm-air pipe interval, the hot-air that hot-air generator produces sprays from the space between interior pipe and warm-air pipe, heating is in control in making, maintain the temperature at 60-100 degrees Celsius, prevent the tail gas generation condensation flowing through interior pipe;
Preferably, water back unit adopts electric heating or adopts the form of insulation material pipeline.
Measuring unit comprises T-shaped pipeline, opto-electronic receiver converter, light source and two lens, T-shaped pipeline has the entrance of the end of the vertical portion being positioned at T-shaped pipeline and is positioned at two outlets at two ends of transverse part of T-shaped pipeline, entrance is connected with main pipeline, an outlet is connected with adjacent lens with opto-electronic receiver converter, and another outlet is connected with another adjacent lens with light source.This measuring unit adopts shunting transmissive design, flows through in T-shaped pipe process utilize tail gas to the principle of light absorption to measure the smoke intensity value of tail gas at tail gas.
Preferably, in T-shaped pipeline, be carved with perfect thread, surface be oxidized black process, diffusing of T-shaped pipeline internal reflection and diffusion effect can being produced should be reduced to a minimum on photronic impact.
Further, T-shaped pipeline is furnished with heater element and temperature sensor, by temperature constant at 100 degrees Celsius, testing environment can also be made while minimizing condensation vapor to keep stable, ensure each repeatability measured.T-shaped pipeline is furnished with baroceptor, can by barometric information correction testing result.
Further, by the gas outlet seat that tube wall O-ring seal is connected with two exit seals respectively, gas outlet seat have gas outlet, hollow compressing tablet, intercept glass and eyeglass sealing gasket, intercepting glass is fixed on the seat of gas outlet by compressing tablet and eyeglass sealing gasket, the light that light source sends enters an outlet of T-shaped pipeline through the obstruct glass on lens, gas outlet seat, and arrives opto-electronic receiver converter from another outlet of T-shaped pipeline through obstruct glass (4) and another lens.
This air-channel system also comprises the flow controlling unit being positioned at measuring unit downstream be arranged on supervisor's road, and flow controlling unit comprises the T-valve, filtrator, flowmeter, gas cushion and the vacuum pump that are connected in turn with measuring unit exhaust emission tube road.Tail gas can not pollute rear class flowmeter after filtering at this unit, and gas cushion can the fluctuation of regime flow curve, adds the monitoring of flow meter, can ensure stablizing of whole gas circuit flow curve, thus the accuracy of guarantee measured value,
Preferably, filtrator and bypass strainer use filter core, can manually change after pollution.
Further, flow controlling unit also comprises rear surrounding air interface, is connected with filtrator by T-valve.By the rear surrounding air interface of T-valve, vacuum pump is communicated with ambient atmosphere, causes vacuum pump to enter the holding state of idle running, decrease the time waiting for that vacuum pump starts, make the reaction of air-channel system quicker.
This air-channel system also comprises gas analysis unit, is used for detecting CO, CO of tail gas
2, HC composition.Gas analysis unit comprises the bypass strainer and optical platform for gas analysis that are linked in sequence, optical platform for gas analysis has Standard Gases interface, can calibrate gas analysis unit from Standard Gases interface input Standard Gases, optical platform for gas analysis is connected with the outlet of gas cushion, and the entrance of bypass strainer is connected with the entrance of T-shaped pipeline.
Further, pressurized air port, pressure regulation strainer valve are connected with interior pipe by the second solenoid valve.Pressurized air can be spouting from the surrounding air interface of sampling unit at a high speed through the second solenoid valve, reaches the object of clean sampling pipe unit.
Further, sampling unit also comprises the surrounding air interface be connected with sampling valve, 4th solenoid valve is two-position three way magnetic valve, to be communicated with or sampling probe is communicated with main pipeline with the air interface that controls environment with main pipeline, thus switches between blowback state and measuring state.
Further, the main pipeline between measuring unit and heating unit is arranged two-way Pneumatic valve, and be connected with pressurized air port, pressure regulation strainer valve by the 3rd solenoid valve, the 3rd solenoid valve is two-position three way magnetic valve.
Preferably, the first solenoid valve, the second solenoid valve are all Direct Action Type three-way electromagnetic valve.
Preferably, sampling valve and T-valve are threeway Air control valve structures, and contamination resistance is strong, and can continue when passing into high-temperature tail gas to use the long period.
The utility model compared with prior art has significant advantage and beneficial effect:
(1) the utility model is optimized design to the pipe system that tail gas circulates, and be equipped with vacuum pump, can make measurement physical responses time≤0.2s, sampling rapidly, real-time is good, the measurement of the multiple detection operating mode such as " ECER24 " and " ELR " can be met, meet the requirement of a series of world such as ISO11614, GB3847-2005, GB17691-2005 and national standard.
(2) native system can support that useful luminous flux road length is 430mm international standard measurement of length unit.The optical channel that this length uses than smoke opacity measuring equipment domestic is at present longer, thus can carry out sampled measurements to more tail gas sample at every turn, ensure that the accuracy of measurement.
(3) vacuum pump of stability of flow is adopted to sample to tail gas, overall gas circuit keeps impermeability, and under the effect of gas cushion, flowmeter and rational piping system, can ensure to measure the pressure of tail gas when optical channel is measured at every turn, the stable of flow velocity, measure optical channel with heating element and sensor simultaneously, temperature stabilization during emission measuring can be ensured, make each measurement environment relatively consistent, thus measurement result is reproducible.
(4) sampling probe vertically inserts pipeline center, and head has 45 degree of inclined-planes, little on the impact of exhaust pipe road back pressure during sampling.
(5) there is efficient blowback cleaning function, use high-speed compressed air to clean sampling conduit, the accurate of measurement result can be ensured.
(6) adopt interchangeable filter element filtering tail gas after measuring, decrease the pollution of rear class element, improve serviceable life, reduce the pollutant that system is expelled to air, environment-protecting clean simultaneously.
(7) CO, CO of energy synchro measure diesel motor exhaust
2, HC composition.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the air-channel system according to the utility model embodiment.
Fig. 2 is the schematic diagram of the measuring unit according to the utility model embodiment.
Fig. 3 is the schematic diagram of the vertical coupling arrangement according to the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments to novel the further illustrating of this hair, to make those skilled in the art better can understand this with novel and can be implemented, but illustrated embodiment is not as to restriction of the present utility model.Based on the embodiment in of the present utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, comprise the sampling unit be linked in sequence be arranged on main pipeline, water back unit, measuring unit 22, flow controlling unit and gas analysis unit according to air-channel system of the present utility model, wherein said main pipeline marks with heavy line in FIG.
According to an embodiment of the present utility model, the 4th solenoid valve DF4 that described sampling unit comprises sampling probe 15, sampling valve ST1 and is connected with sampling valve, sampling probe 15 inserts exhaust pipe road, carries out the sampling of tail gas.Preferably, sampling probe can have the inclined-plane of 45 degree at head place, and outside have mark inclined-plane towards mark.Like this, sampling probe is when vertical insertion pipeline center, because head has 45 degree of inclined-planes, therefore little on the back pressure impact in exhaust pipe road during sampling.In addition, according to an example, sampling probe can be welded by corrugated stainless steel tubing and stainless-steel tube, and corrugated stainless steel tubing has radiating effect, high-temperature tail gas temperature can be down in scope that rear class duct element can bear.But, it will be understood to those of skill in the art that this example is only exemplary, and the composition of sampling probe is not limited thereto.
Water back unit comprises interior pipe 17, warm-air pipe 18 and the hot-air generator 19 be linked in sequence, flow speed control valve TS, the first solenoid valve DF1, pressure regulation strainer valve 20 and pressurized air port 21.Interior pipe 17 is connected to sampling valve ST1 by main pipeline, and interior pipe 17 passes the inside of warm-air pipe 18 and separates certain space with warm-air pipe 18, the hot-air that hot-air generator 19 is produced sprays from the space between interior pipe 17 and warm-air pipe 18, heating is in control in making, maintain the temperature at 60-100 degrees Celsius, thus prevent the tail gas generation condensation flowing through interior pipe.Preferably, water back unit can adopt electric heating or adopt the form of insulation material pipeline.
Measuring unit comprises T-shaped pipeline 7, opto-electronic receiver converter 1, light source 11 and two lens 2, T-shaped pipeline 7 has the entrance 70 of the end of the vertical portion being positioned at T-shaped pipeline and is positioned at two outlets 71 at two ends of transverse part of T-shaped pipeline, entrance 70 is connected with main pipeline, an outlet is connected with adjacent lens 2 with opto-electronic receiver converter 1, and another outlet is connected with another adjacent lens with light source 10.This measuring unit adopts shunting transmissive design, flows through in T-shaped pipe process utilize tail gas to the principle of light absorption to measure the smoke intensity value of tail gas at tail gas.Preferably, be carved with perfect thread in T-shaped pipeline, and inside surface is oxidized black process, diffusing of T-shaped pipeline internal reflection and diffusion effect can being produced should be reduced to a minimum on photronic impact.
Further, the structural representation of measuring unit 22 of the present utility model as shown in Figure 2, two outlets 71 are respectively arranged with the gas outlet seat 6 be tightly connected with it by tube wall O-ring seal 10, gas outlet seat 6 has gas outlet 12, the compressing tablet 3 of hollow, intercept glass 4 and eyeglass sealing gasket 5, intercepting glass 4 is fixed on gas outlet seat 6 by compressing tablet 3 and eyeglass sealing gasket, the light that light source 11 sends is through lens 2, obstruct glass 4 on gas outlet seat 6 enters an outlet of T-shaped pipeline 7, and arrive opto-electronic receiver converter 1 from another outlet of T-shaped pipeline 7 through obstruct glass 4 and another lens 2.The gas outlet seat 6 on T-shaped pipeline both sides forms a relative sealing system with obstruct glass 4, compressing tablet 3, eyeglass sealing gasket 5, ensures the impermeability of gas circuit, prevents tail gas contaminated or dilution before detection.
Smoke opacity measures the diesel engine smoke intensity smoke opacity method of testing adopting national regulation, according to Lambert-Beer's law, utilizes tail gas to the principle of light absorption to measure the smoke intensity value of tail gas.T-shaped pipeline side is light source 11, adopts long-life LED, luminous predominant wavelength at 550nm to 570nm, before have lens 2 to converge light to inject T-shaped pipeline; Opposite side is opto-electronic receiver converter 1, and the photoelectric cell adopting spectral response curve should be similar to the photopia curve of human eye makes, before have lens 2 to converge to receive the light that sends of light source.By gathering the signal of opto-electronic receiver converter accepts, carrying out data processing by processor, finally calculating coefficient of light absorption K value and luminous absorptance N.
In addition, also comprise according to air-channel system of the present utility model and be arranged on main pipeline and be positioned at the flow controlling unit in measuring unit downstream, flow controlling unit comprises the T-valve ST2, filtrator 24, flowmeter 25, gas cushion 26 and the vacuum pump 30 that are connected with the exhaust emission tube road order of measuring unit.Tail gas can not pollute rear class flowmeter after filtering at flow controlling unit, and gas cushion can the fluctuation of regime flow curve, adds the monitoring of flow meter, can ensure stablizing of whole gas circuit flow curve, thus the accuracy of guarantee measured value.Preferably, filtrator uses filter core, can manually change after pollution.Further, flow controlling unit can also comprise rear surrounding air interface 23, and this interface is connected with filtrator 24 by T-valve ST2.Vacuum pump can be made by T-valve ST2 to be communicated with ambient atmosphere with rear surrounding air interface, cause vacuum pump to enter the holding state of idle running, decrease the time waiting for that vacuum pump starts, make the reaction of air-channel system quicker.
Further, as shown in Figure 3, smoke discharging pipe arranges the vertical coupling arrangement 8 of flue, sampling probe enters smoke discharging pipe sampling through the vertical coupling arrangement 8 of flue.This can add this flue coupling arrangement in the centre position of exhaust pipe road flat segments, by the direction that the inclined-plane of 45 degree, sampling probe head flows into towards flue gas stream, sampling probe vertically inserts in the vertical coupling arrangement 8 of flue, and this device can adopt the form fixed sample probe of screw thread, welding, flange or clip.The degree of depth that sampling probe vertically inserts gas exhaust duct must make center, inclined-plane as far as possible close to gas exhaust duct center line.
Alternatively, T-shaped pipeline 7 can be provided with heater element and temperature sensor, by temperature constant at 100 degree, testing environment can also be made while minimizing condensation vapor to keep stable, ensure each repeatability measured.T-shaped pipeline 7 is furnished with baroceptor, can by barometric information correction testing result.
According to an embodiment, pressurized air port 21, pressure regulation strainer valve 20 are connected with interior pipe 17 by the 4th solenoid valve DF2, thus pressurized air is spouting from the surrounding air interface 16 of sampling unit at a high speed through the second solenoid valve DF2, reach the object of clean sampling pipe unit.This part structure constitutes blowback cleaning unit.Preferably, the first solenoid valve DF1, the second solenoid valve DF2 can be Direct Action Type two-way electromagnetic valve.
Further, sampling unit also comprises the surrounding air interface 16 be connected with sampling valve ST1.4th solenoid valve DF4 can be two-position three way magnetic valve, to be communicated with or sampling probe 15 is communicated with main pipeline with the air interface 16 that controls environment with main pipeline, thus switches between blowback state and measuring state.
Further, the main pipeline between measuring unit and heating unit is arranged two-way Pneumatic valve QF, and be connected with pressurized air port 21, pressure regulation strainer valve 20 by the 3rd solenoid valve DF3, the 3rd solenoid valve DF3 is two-position three way magnetic valve.
Preferably, sampling valve ST1 and T-valve ST2 is threeway Air control valve structure, and contamination resistance is strong, and can continue when passing into high-temperature tail gas to use the long period.
Native system also comprises gas analysis unit, is used for detecting CO, CO of tail gas
2, HC composition.Gas analysis unit comprises the bypass strainer 27 and optical platform for gas analysis 28 that are linked in sequence, and optical platform for gas analysis 28 has Standard Gases interface 29, and inputting Standard Gases from Standard Gases interface 29 can calibrate gas analysis unit.Optical platform for gas analysis 28 is connected with the outlet of gas cushion 26, and the outlet of bypass strainer 27 is connected with the entrance 70 of T-shaped pipeline.
In order to save cost, with four-way connection F1, three-way connection T1, pressure regulation strainer valve 21 and solenoid valve DF1, DF2, DF3, DF4 can be coupled together, by three-way connection T3, interior pipe 17, DF2, QF are coupled together, by three-way connection T4, bypass strainer 27 is coupled together with T-shaped entrance 70, QF, by three-way connection T5, the gas outlet 12 on T-valve ST2 and two gas outlet seat 6 is coupled together, will be coupled together for optical platform for gas analysis 28, vacuum pump 30 and gas cushion 26 by three-way connection T7.
The principle of work of air-channel system described in the utility model is described referring to table 1.Table 1 gives the controlled case of solenoid valve and pump under different operating state.
1. measuring state
When emission measuring, solenoid valve DF4 is energized switching, controls sampling valve ST1 and T-valve ST2 and switches UNICOM's main pipeline.Solenoid valve DF3 is energized switching, controls Pneumatic valve QF and opens and make measuring unit be communicated with sampling unit.Vacuum pump energising is opened, and tail gas is sucked by the vertical sampling probe inserting center, exhaust pipe road by vacuum pump.Tail gas temperature after sampling probe heat radiation is down to safe range, is entered the water back unit being preheated to 60 ~ 100 degrees Celsius, to prevent condensation by sampling valve ST1.By Pneumatic valve QF after tail gas, be divided into two-way again: a road enters measuring unit and carries out smoke measurement, after passing through measuring unit, tail gas stream is through T-valve ST2, enter filtrator to be filtered, enter gas cushion after flowing through its flow of flowmeter survey again and cushion its fluctuation, then be evacuated to the discharge of tail gas discharge interface via vacuum pump; Bypass strainer of separately leading up to is sucked by vacuum pump, is conveyed into other optical detection platform and detects CO, CO
2, HC composition, afterwards from three-way connection T7 return main pipeline from tail gas discharge interface discharge.
2. holding state
Gap before measuring or between measuring and measuring, system enters holding state.Now solenoid valve DF4 is not energized, and sampling valve ST1 and T-valve ST2 keeps and surrounding air interface and rear surrounding air orifice.Solenoid valve DF3 is energized switching, controls Pneumatic valve QF and opens and make measuring unit be communicated with sampling pipe unit.Now vacuum pump is in opening, from the rear surrounding air orifice air idle running of T-valve ST2.System wait instruction enters measuring state.
3. blowback state
When air-channel system is opened or be other desired, air-channel system can carry out blowback operation to sampling pipe unit.Now solenoid valve DF4 is not energized, and sampling valve ST1 and T-valve ST2 keeps and surrounding air interface and rear surrounding air orifice.Solenoid valve DF3 is not energized, and Pneumatic valve QF keeps closing, and measuring unit keeps disconnecting with sampling pipe unit.Solenoid valve DF2 opens, and allows high-speed compressed air be blown into sampling pipe unit by three-way connection T3, is blown out by pollutant from the surrounding air interface of sampling valve ST1.
4. leak detection state
During leak detection, solenoid valve DF4 is energized switching, controls sampling valve ST1 and T-valve ST2 and switches UNICOM's main pipeline.Solenoid valve DF3 is energized switching, controls Pneumatic valve QF and opens and make measuring unit be communicated with sampling pipe unit.Then clog sampling probe with chock plug, vacuum pump startup vacuumizes air-channel system, is evacuated to certain pressure final vacuum pump and stops, entering leak detection state, start to hunt leak with the change of pipe pressure sensor testing pipes pressure.
5. light obscuration calibration
During calibration zeroing, solenoid valve DF4 is energized, and sampling valve ST1 and T-valve ST2 is communicated with main pipeline.Solenoid valve DF3 is energized switching, controls Pneumatic valve QF and opens and make measuring unit be communicated with sampling pipe unit.Vacuum pump is opened and is bled.Now measuring unit can carry out light obscuration zeroing or calibration operation.
6. gas componant calibration
Vacuum pump energising work under this state, solenoid valve DF4, DF3 are not energized, and sampling valve ST1 and T-valve ST2 makes main pipeline and surrounding air interface and rear surrounding air orifice, and Pneumatic valve QF closes.Zeroing or the calibration of optical platform for gas analysis is now carried out from the Standard Gases interface access calibrating gas of optical platform for gas analysis.
7. after start, no matter instrument is in any state, and water back unit remains work, so solenoid valve DF1 remains unlatching.
Table 1 is the control explanation of solenoid valve and vacuum pump under various duty.
Claims (14)
1. an air-channel system for motor exhaust measurement, is characterized in that, comprise the sampling unit be linked in sequence be arranged on main pipeline, water back unit, measuring unit (22), flow controlling unit and gas analysis unit, wherein:
The 4th solenoid valve (DF4) that described sampling unit comprises sampling probe (15), sampling valve (ST1) and is connected with described sampling valve;
Described water back unit comprises interior pipe (17), warm-air pipe (18) and the hot-air generator (19) be linked in sequence, flow speed control valve (TS), first solenoid valve (DF1), pressure regulation strainer valve (20) and pressurized air port (21), described interior pipe (17) is connected to described sampling valve (ST1) by described main pipeline, and described interior pipe (17) through described warm-air pipe (18) inside and separate certain space with described warm-air pipe (18), the hot-air that described hot-air generator (19) produces sprays from the space between described interior pipe (17) and described warm-air pipe (18),
Described measuring unit comprises T-shaped pipeline (7), opto-electronic receiver converter (1), light source (11) and two lens (2), described T-shaped pipeline (7) has the entrance (70) of the end of the vertical portion being positioned at described T-shaped pipeline and is positioned at two outlets (71) at two ends of transverse part of described T-shaped pipeline, described entrance (70) is connected with described main pipeline, an outlet in described outlet (71) is connected with adjacent lens (2) with described opto-electronic receiver converter (1), another outlet in described outlet (71) is connected with another adjacent lens with described light source (10),
Described flow controlling unit to be arranged on main pipeline and to be positioned at the downstream of described measuring unit, and described flow controlling unit comprises the T-valve (ST2), filtrator (24), flowmeter (25), gas cushion (26) and the vacuum pump (30) that are connected with the gas outlet of described measuring unit (12) order and passes through the rear surrounding air interface (23) that the second T-valve (ST2) is connected with described filtrator (24); And
Described gas analysis unit, described gas analysis unit comprises the bypass strainer (27) and optical platform for gas analysis (28) that are linked in sequence, described optical platform for gas analysis (28) is connected with the outlet of gas cushion (26), described optical platform for gas analysis (28) connection standard gas interface (29), the entrance of described bypass strainer (27) is connected with the entrance (70) of T-shaped pipeline.
2. air-channel system according to claim 1, it is characterized in that, also comprise by tube wall O-ring seal (10) and described two gas outlet seats (6) exporting (71) and be tightly connected, described gas outlet seat (6) has gas outlet (12), the compressing tablet (3) of hollow, intercept glass (4) and eyeglass sealing gasket (5), described obstruct glass (4) is fixed on gas outlet seat (6) by compressing tablet (3) and eyeglass sealing gasket, the light that described light source (11) sends is through lens (2), obstruct glass (4) on gas outlet seat (6) enters an outlet of described T-shaped pipeline (7), and arrive opto-electronic receiver converter (1) from another outlet of T-shaped pipeline (7) through obstruct glass (4) and lens (2) described in another.
3. air-channel system according to claim 1, is characterized in that, described 4th solenoid valve (DF4) is connected with described T-valve (ST2).
4. air-channel system according to claim 1, is characterized in that, described pressurized air port (21), described pressure regulation strainer valve (20) are connected with described interior pipe (17) by the second solenoid valve (DF2).
5. air-channel system according to claim 1, it is characterized in that, described sampling unit also comprises the surrounding air interface (16) be connected with described sampling valve (ST1), described 4th solenoid valve (DF4) is two-position three way magnetic valve, to be communicated with described main pipeline or described sampling probe (15) is communicated with described main pipeline to control described surrounding air interface (16), thus to switch between blowback state and measuring state.
6. air-channel system according to claim 1, it is characterized in that, main pipeline between described measuring unit and described heating unit is arranged two-way Pneumatic valve (QF), and be connected with described pressurized air port (21), described pressure regulation strainer valve (20) by the 3rd solenoid valve (DF3), described 3rd solenoid valve (DF3) is two-position three way magnetic valve.
7. the air-channel system according to any one of claim 1-6, is characterized in that, described sampling probe has the inclined-plane of 45 degree at head place, the outside of described sampling probe have mark inclined-plane towards mark.
8. air-channel system according to claim 1, is characterized in that, described water back unit adopts electric heating or adopts the form of insulation material pipeline.
9. air-channel system according to claim 1, is characterized in that, described sampling probe is welded by corrugated stainless steel tubing and stainless-steel tube.
10. air-channel system according to claim 1, is characterized in that, comprising:
Be arranged on the vertical coupling arrangement of flue (8) on smoke discharging pipe, described sampling probe (15) enters smoke discharging pipe sampling by the vertical coupling arrangement of described flue (8).
11. air-channel systems according to claim 1, is characterized in that, described T-shaped pipe (7) is provided with heater element, temperature sensor and baroceptor.
12. air-channel systems according to claim 1, is characterized in that, described filtrator (24) and described bypass strainer (27) use filter core.
13. air-channel systems according to claim 4, is characterized in that, described first solenoid valve (DF1), the second solenoid valve (DF2) are Direct Action Type two-way electromagnetic valve.
14. air-channel systems according to claim 1, is characterized in that, be carved with perfect thread, and the inside surface of described T-shaped pipeline are oxidized black process in described T-shaped pipeline (7).
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| CN106053156A (en) * | 2016-08-08 | 2016-10-26 | 华电电力科学研究院 | Flue gas sampling device and method thereof |
| CN106769236A (en) * | 2016-11-11 | 2017-05-31 | 广汽本田汽车有限公司 | Vehicular exhaust sampling mechanism, Vehicular exhaust detection means and method |
| CN108692761A (en) * | 2017-04-12 | 2018-10-23 | 北京万生人和科技有限公司 | A kind of air quality sample testing meter |
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| CN111175092A (en) * | 2019-12-20 | 2020-05-19 | 中国北方发动机研究所(天津) | Diesel engine plateau environmental test exhaust smoke intensity test supplementary device |
| CN111413101A (en) * | 2020-04-02 | 2020-07-14 | 无锡市海龙机械有限公司 | Engine exhaust emission detection device and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106053156A (en) * | 2016-08-08 | 2016-10-26 | 华电电力科学研究院 | Flue gas sampling device and method thereof |
| CN106053156B (en) * | 2016-08-08 | 2019-03-01 | 华电电力科学研究院 | Flue gas sampling device and method |
| CN109716092A (en) * | 2016-10-17 | 2019-05-03 | Avl排放测试系统有限责任公司 | For measuring the gas transport unit of the waste-gas analysis unit of engine exhaust gas |
| CN109716092B (en) * | 2016-10-17 | 2020-12-15 | Avl排放测试系统有限责任公司 | Gas delivery unit for an exhaust gas analysis unit for measuring exhaust gases of an internal combustion engine |
| US10962447B2 (en) | 2016-10-17 | 2021-03-30 | Avl Emission Test Systems Gmbh | Gas feed unit for an exhaust-gas analysis unit for the measurement of exhaust gases of internal combustion engines |
| CN106769236A (en) * | 2016-11-11 | 2017-05-31 | 广汽本田汽车有限公司 | Vehicular exhaust sampling mechanism, Vehicular exhaust detection means and method |
| CN106769236B (en) * | 2016-11-11 | 2019-07-23 | 广汽本田汽车有限公司 | Vehicular exhaust sampling mechanism, Vehicular exhaust detection device and method |
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| CN108692761B (en) * | 2017-04-12 | 2024-02-06 | 北京万生人和科技有限公司 | Air quality sampling detector |
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| CN111413101A (en) * | 2020-04-02 | 2020-07-14 | 无锡市海龙机械有限公司 | Engine exhaust emission detection device and working method thereof |
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