CN2800278Y - Detection gas path of gasoline vehicle exhaust detection system by simple working condition method - Google Patents
Detection gas path of gasoline vehicle exhaust detection system by simple working condition method Download PDFInfo
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- CN2800278Y CN2800278Y CN 200520023014 CN200520023014U CN2800278Y CN 2800278 Y CN2800278 Y CN 2800278Y CN 200520023014 CN200520023014 CN 200520023014 CN 200520023014 U CN200520023014 U CN 200520023014U CN 2800278 Y CN2800278 Y CN 2800278Y
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Abstract
The utility model relates to a detecting gas path of an exhaust detection system of a gasoline vehicle by a simple working condition method, which comprises a tail gas sampling and preprocessing unit, a gas measuring unit, a standard gas calibrating unit, and a back flushing and cleaning unit, wherein the tail gas sampling and preprocessing unit is connected with a condenser. The gas measuring unit is provided with a pressure sensor, and the pressure sensor is connected with a measure gas path by a two-position three way magnetic valve. The port of an air compressor and the port of a sampling probe are connected to the inlet of the detecting gas path through the back flushing and cleaning unit by the other two-position three way magnetic valve. The utility model has the advantages of increased back flushing, cleaning, sealing and measuring ability, exact measuring effect and long service life. The utility model can meet the use requirement of a tail gas exhaust detecting device of an automobile in various large and medium-sized automotive vehicle detecting fields.
Description
Technical field
The utility model relates to measurement mechanism, particularly relates to the detection gas circuit of the simple and easy behavior method discharging detection system of a kind of gasoline car.
Background technology
At present, the problem that detection gas circuit ubiquity structural design is simple, functions of use is single that is used for the motor vehicle exhaust emission detection that gas analyzer equipment manufacturers are produced both at home and abroad, lack and guarantee that gas circuit is accurate, the technological means and the detection method of reliably working, cause gas circuit to occur abominable situation such as leakage, inlet pipe, water inlet easily, cause survey sensor impaired even, service life of equipment seriously reduces.
Illustrate existing gasoline motor car exhausted gas below and detect the problem that gas circuit exists:
As everyone knows, automobile exhaust pipe outlet discharge tail gas temperature is up to hundreds of degree centigrade, and tail gas can play certain cooling effect through sampling probe and sampling flexible pipe thereof, and the water that the fractional saturation water vapour in the tail gas can liquefy accumulates.Usually, only force cooling in the detection gas circuit of the said equipment, play certain effect by increasing the one-level separator.But the gas of sending into gas measurement unit through separator still has higher temperature and moisture content.Under the bigger situation of device measuring intensity, these factors all will cause damage to survey sensor, have influence on the measurement accuracy and the serviceable life of sensor.In detecting gas circuit, strengthen dewatering and refrigerating function, seem particularly important.
Usually automobile is being carried out before exhaust emissions detects, promptly between the detection of two tested automobiles, need carry out the blowback cleaning to sampling probe and sampling flexible pipe thereof with the compression surrounding air, clean measuring gas circuit inside with the atmospheric pressure environment air simultaneously, to reach the purpose that drains tail gas and condensate water fast, avoid the measurement of next car is exerted an influence, guarantee the accuracy that detects.But, do not possess the blowback cleaning function in the detection gas circuit of the said equipment, so exist detection gas circuit scavenging period long, cleaning performance is poor, influences the problem of detection efficiency and detection accuracy.
In addition, for the measuring accuracy and the accuracy that guarantee equipment interference-free, detect gas circuit and also should have whether airtight good sealing property measurement function of the whole sampling channel gas circuit of detection, to prevent in tail gas sampled measurements process because the intrusion of surrounding air causes measurement result error to occur.Usually, do not possess the gas pressure sensor that can carry out leak check in the detection gas circuit of the said equipment, can't obtain the pressure changing in the sealing gas circuit, in case gas circuit is because excessive inlet pipe or the loosening phenomenon of occurring of pressure, can not in time handle, thereby influence the accuracy of measurement result.
The utility model content
The purpose of this utility model is to solve existing tail-gas from gasoline automobiles to detect the problem that gas circuit exists, and a kind of have blowback cleaning and sealing detection function are provided, and measures accurately, and the tail-gas from gasoline automobiles of long service life detects gas circuit.
The detection gas circuit of the simple and easy behavior method discharging detection system of the utility model gasoline car, comprise tail gas sampling and pretreatment unit, calibrating gas alignment unit and be connected gas measurement unit between these two unit by the 5th solenoid valve, the tail gas sampling comprises separator and first filter core that links to each other with pretreatment unit, and gas measurement unit comprises CO, CO
2With the HC measuring table, the calibrating gas alignment unit comprises surrounding air, standard zero gas, high standard and low gas body interface, the inlet of described separator is connected to blowback cleaning unit, and described blowback cleaning unit comprises air compressor port, sampling probe port and is installed in the 4th solenoid valve between this two port and the described separator; Described tail gas sampling and pretreatment unit are provided with the condenser that is installed between described separator and described first filter core, and described condenser links to each other with second filter core, the 7th solenoid valve and the 6th solenoid valve, unwatering pump and drain port through the 3rd filter core respectively with separator; Described calibrating gas alignment unit is provided with pressure limiting device, described pressure limiting device be installed in respectively with described standard zero gas, high standard and input gas circuit that low gas body interface links to each other in; Described gas measurement unit is provided with pressure transducer, and described pressure transducer is connected to outlet and described CO, the CO of described first filter core respectively by the 8th solenoid valve
2Inlet with the HC measuring table.
Detection gas circuit of the present utility model, wherein said the four～eight solenoid valve is a two-position three way magnetic valve.
Detection gas circuit of the present utility model, wherein said condenser adopts the semiconductor condenser.
The advantage of the detection gas circuit of the simple and easy behavior method discharging detection system of the utility model gasoline car is: increased blowback cleaning and sealing detection function, measure accurately, long service life can satisfy the user demand of all kinds of large and medium-sized motor vehicle inspection ﹠ testing grounds to the motor vehicle exhaust emission checkout equipment.
Description of drawings
Below in conjunction with drawings and Examples the technical solution of the utility model is elaborated.
Fig. 1 is the detection gas circuit structure synoptic diagram of the simple and easy behavior method discharging detection system of the utility model gasoline car.
Embodiment
Referring to Fig. 1, the detection gas circuit of the simple and easy behavior method discharging detection system of the utility model gasoline car comprises tail gas sampling and pretreatment unit, gas measurement unit, calibrating gas alignment unit and blowback cleaning unit.
Pretreatment unit have separator 9 and be installed in separator 9 and the first filter core F1 between condenser 10.Condenser 10 links to each other with the 6th solenoid valve SV6, unwatering pump 11 and drain port 4,3 with the second filter core F2, the 7th solenoid valve SV7 through the 3rd filter core F3 respectively with separator 9.
Gas measurement unit has vacuum switch sensor 12, sampling pump 13, the 4th filter core F4, CO, CO
2With HC measuring table 15, O
2Sensor 16, NO sensor 15, O
2Exhaust port 19, NO exhaust port 18 and gas pressure sensor 14, pressure transducer 14 are connected to outlet and CO, the CO of the first filter core F1 respectively by the 8th solenoid valve SV8
2Inlet with HC measuring table 15.
The calibrating gas alignment unit has pressure limiting device R1 and R2, pressure limiting device R1 and R2 be installed in respectively with standard zero gas, high standard and input gas circuit that low gas body interface 6 ~ 8 links to each other in.
Blowback cleaning unit is positioned at the inlet of separator.Blowback cleaning unit comprises air compressor port one, sampling probe port 2, and the 4th solenoid valve SV4 is installed between this two port and separator 9.
The function that detects gas circuit is as follows:
Tail gas sample gas enters that the pretreatment unit of being made up of separator 9, condenser 10 and the first filter core F1 dewaters, after dedusting and cooling handle, enters by CO, CO by the 5th solenoid valve SV5, sampling pump 13, the 4th filter core F4 by sample port 2, the 4th solenoid valve SV4
2With HC measuring table 15, O
2The gas measurement unit that sensor 16, NO sensor 17 are formed carries out gas concentration and detects.The ponding that forms after separator 9 and condenser 10 coolings is discharged gas circuit by duplex unwatering pump 11 through drain port 3 and 4 by the second filter core F2, the 3rd filter core F3 respectively.Surrounding air, standard zero gas, high standard and low gas body then can pass through by the 5th filter core F5, solenoid valve SV1, solenoid valve SV2 and solenoid valve SV3, and the calibrating gas alignment unit that pressure limiting device R1, R2 form enters into gas measurement unit, carries out the demarcation and the calibration of each gas sensor.Can be from the gases at high pressure of air compressor port one by the 4th solenoid valve SV4 of blowback cleaning unit, the sampling probe that is linked into sample port 2 and the residual gas in the sampling flexible pipe thereof and ponding are carried out blowback clean.
Now the course of work to the utility model detection gas circuit is described in detail as follows:
With reference to table 1, table 1 has provided the controlled situation of measuring gas circuit solenoid valve and pump in the various courses of work.1. tail gas is measured
When carrying out the tail gas measurement, from the vehicle exhaust sample gas in sampling probe and the sampling flexible pipe thereof, enter gas circuit by sampling input port 2, through the 4th solenoid valve SV4, separator 9, condenser 10, the first filter core F1 lower the temperature, dewater and dust removal process after, again through threeway T1, solenoid valve SV5, threeway T2, by sampling pump 13 suction, enter into CO, CO through threeway T3
2, HC measuring table 15 carries out gas concentration measurement, enters into O respectively through threeway T4 again
2 Sensor 16 and NO sensor 17 carry out gas concentration measurement, and final gas is discharged to outdoor by exhaust port 19 and 18 respectively.
Sampling pump, unwatering pump: " 0 " expression pump is in closed condition, and " 1 " expression pump is in running order.</entry></row></tbody></tgroup></table></tables>
In the tail gas an isolated condensate water part through separator 9 bottoms, the second filter core F2, the 6th solenoid valve SV6, be discharged to outdoor by unwatering pump 11 by drain port 3, all the other most of condensate waters then through condenser 10 bottoms, the 3rd filter core F3, the 7th solenoid valve SV7, be discharged to outdoor by unwatering pump 11 by drain port 4.
2. environment measurement
When carrying out the surrounding air measurement, surrounding air enters gas circuit by surrounding air input port 5, through solenoid valve SV1, solenoid valve SV3, the 5th solenoid valve SV5, threeway T2, by sampling pump 13 suction, enters into CO, CO through the 4th filter core F4, threeway T3
2, HC measuring table 15 carries out gas concentration measurement, enters into O respectively through threeway T4 again
2 Sensor 16 and NO sensor 17 carry out gas concentration measurement, and final gas is discharged to outdoor by exhaust port 19 and 18 respectively.
3. zeroing
When each gas sensor is returned to zero, to enter gas circuit by zeroing input port 6 from the standard zero gas in zero air generator or the gas cylinder, gas is through pressure limiting device R1, solenoid valve SV1, solenoid valve SV3, the 5th solenoid valve SV5, threeway T2, by sampling pump 13 suction, enter into CO, CO through the 4th filter core F4, threeway T3
2, HC measuring table 15 carries out sensor zeroing, enters into O respectively through threeway T4 again
2 Sensor 16 and NO sensor 17 carry out the sensor zeroing, and final zero gas is discharged to outdoor by exhaust port 19 and 18 respectively.Wherein, the effect of pressure limiting device R1 is to avoid because the high pressure that the input gaseous tension produces after heightening accidentally causes damage to measuring table and sensor.
4. low mark
To CO, CO
2, HC and NO sensor carry out the lower range timing signal, to enter gas circuit by low mark input port 7 from the standard lower range marked gas in the gas cylinder, gas is through solenoid valve SV2, pressure limiting device R2, solenoid valve SV3, solenoid valve SV5, threeway T2, by sampling pump 13 suction, enter into CO, CO through filter core F4, threeway T3
2, HC measuring table 15 carries out the sensor lower range and demarcates, and enters into O respectively through threeway T4 again
2 Sensor 16 and NO sensor 17 carry out the lower range of NO sensor and demarcate, and finally low gas body is discharged to outdoor by exhaust port 19 and 18 respectively.Wherein, the effect of pressure limiting device R2 is to avoid because the high pressure that the input gaseous tension produces after heightening accidentally causes damage to measuring table and sensor.
5. high standard
To CO, CO
2, HC and NO sensor carry out the high range timing signal, to enter gas circuit by high standard input port 8 from the standard high range marked gas in the gas cylinder, gas is through solenoid valve SV2, pressure limiting device R2, solenoid valve SV3, the 5th solenoid valve SV5, threeway T2, by sampling pump 13 suction, enter into CO, CO through filter core F4, threeway T3
2, HC measuring table 15 carries out the sensor high range and demarcates, and enters into O respectively through threeway T4 again
2 Sensor 16 and NO sensor 17 carry out the high range of NO sensor and demarcate, and final high standard gas is discharged to outdoor by exhaust port 19 and 18 respectively.Wherein, the effect of pressure limiting device R2 is to avoid because the high pressure that the input gaseous tension produces after heightening accidentally causes damage to measuring table and sensor.
6. blowback is cleaned
When carrying out the blowback cleaning, high pressure fresh air from air compressor enters gas circuit by the air compressor machine port one, again through the 4th solenoid valve SV4, be blown into sampling flexible pipe and sampling probe from sampling input port 2 with the form of blowback, thereby reach residual tail gas and the condensate water purpose of discharging wherein.Simultaneously, fresh surrounding air enters gas circuit by surrounding air input port 5, through solenoid valve SV1, solenoid valve SV3, the 5th solenoid valve SV5, threeway T2, by sampling pump 13 suction, enters into CO, CO through filter core F4, threeway T3
2, HC measuring table 15, enter into O respectively through threeway T4 again
2 Sensor 16 and NO sensor 17, final gas is discharged to outdoor respectively by exhaust port 19 and 18, clean the purpose of measuring the inner tail gas of gas circuit thereby reach.Wherein, the 4th solenoid valve SV4 in the high pressure blowback cleaning gas circuit is arranged on the front end of separator 9; be used to avoid pressure-air that gas circuit and gas sensor are caused damage; both protected the detection gas circuit; reached effective cleaning inner air path again, and the optimum efficiency of with serious pollution sampling flexible pipe of high-pressure wash and probe.
7. sealing detection
When carrying out sealing detection, at first, tail gas is measured passage and is in the measurement state, the duty of each solenoid valve and pump is shown in the 1st description in front, simultaneously, the 8th solenoid valve SV8 is in the operating state that powers on, and has opened by threeway T1 through the passage of the 8th solenoid valve SV8 to pressure transducer 14.At this moment, the air intake opening of sealing sampling probe, so, from external sampling probe and sampling flexible pipe thereof, through sampling input port 2, the 4th solenoid valve SV4, separator 9, condenser 10, the first filter core F1, threeway T1, the 5th solenoid valve SV5, threeway T2 passage to sampling pump 13; From the outlet of separator 9 and condenser 10 bottoms, respectively through the second filter core F2 and the 3rd filter core F3, the 6th solenoid valve SV6 and the 7th solenoid valve SV7 passage to unwatering pump 11; And from threeway T1 through the 8th solenoid valve SV8 to the passage of pressure transducer 14 together, formed an airtight space jointly.Continuous firing along with sampling pump 13 and unwatering pump 11, gas in the space is discharged from gradually, thereby forms a negative pressure field of force in interior volume, and more and more tends to vacuum state, by to the reading of pressure transducer 14 measurement data, can be clearly decompression force situation about descending.When the air pressure in the confined space in the certain hour during near vacuum, the Triggered Vacuum Switch action, at this moment, close sampling pump 13 and unwatering pump 11, read the gas pressure value of the passage in a period of time then continuously, if whole tail gas is measured channel seal requirement up to specification, the recovery value of gaseous tension will fall within the limits prescribed in the passage so, it is qualified that sealing detects, when in case leaking appears in gas circuit in the passage, gas pressure value will surpass the limit value of stipulating very soon, detect defective so just can judge the sealing of measuring gas circuit.
8. contract fully
When the detection gas circuit was not worked, all solenoid valve and pumps did not power on, and are in closed condition, because from pressure transducer 14, the 8th solenoid valve SV8, threeway T3, through CO, CO
2, HC measuring table 15, threeway T4, O
2Sensor 16 and NO sensor 17 to exhaust port 19 and 18 directly communicates with ambient atmosphere, therefore, can directly read the atmospheric pressure value of current environment by pressure transducer 14, and this value is useful when carrying out the gas corrected Calculation.
The utility model tail-gas from gasoline automobiles detects gas circuit has increased blowback cleaning and sealing detection function, measures accurately, and long service life can satisfy the user demand of all kinds of large and medium-sized motor vehicle inspection ﹠ testing grounds to checkout equipment.
Claims (3)
1. the detection gas circuit of the simple and easy behavior method discharging detection system of gasoline car, comprise tail gas sampling and pretreatment unit, calibrating gas alignment unit and be connected gas measurement unit between these two unit by the 5th solenoid valve (SV5), described tail gas sampling comprises separator (9) and first filter core (F1) that links to each other with pretreatment unit, and described gas measurement unit comprises CO, CO
2With HC measuring table (15), described calibrating gas alignment unit comprises surrounding air, standard zero gas, high standard and low gas body interface (5-8), it is characterized in that: the inlet that is positioned at described separator (9) is connected to blowback cleaning unit, described blowback cleaning unit comprise air compressor port (1), sampling probe port (2) and be installed in this two port and described separator (9) between the 4th solenoid valve (SV4); Described tail gas sampling and pretreatment unit are provided with the condenser (10) that is installed between described separator (9) and described first filter core (F1), and described condenser (10) links to each other with second filter core (F2), the 7th solenoid valve (SV7) and the 6th solenoid valve (SV6), unwatering pump (11) and drain port (4,3) through the 3rd filter core (F3) respectively with described separator (9); Described calibrating gas alignment unit is provided with pressure limiting device (R1, R2), described pressure limiting device (R1, R2) be installed in respectively with described standard zero gas, high standard and input gas circuit that low gas body interface (6-8) links to each other in; Described gas measurement unit is provided with pressure transducer (14), and described pressure transducer (14) is connected to outlet and described CO, the CO of described first filter core (F1) respectively by the 8th solenoid valve (SV8)
2Inlet with HC measuring table (15).
2. detection gas circuit according to claim 1 is characterized in that: (SV4～SV8) is two-position three way magnetic valve to wherein said the 4th～the 8th solenoid valve.
3. detection gas circuit according to claim 1 is characterized in that: wherein said condenser (10) adopts the semiconductor condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520023014 CN2800278Y (en) | 2005-06-08 | 2005-06-08 | Detection gas path of gasoline vehicle exhaust detection system by simple working condition method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520023014 CN2800278Y (en) | 2005-06-08 | 2005-06-08 | Detection gas path of gasoline vehicle exhaust detection system by simple working condition method |
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| CN2800278Y true CN2800278Y (en) | 2006-07-26 |
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| CN 200520023014 Expired - Lifetime CN2800278Y (en) | 2005-06-08 | 2005-06-08 | Detection gas path of gasoline vehicle exhaust detection system by simple working condition method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018164A (en) * | 2012-12-06 | 2013-04-03 | 深圳市南油诺安电子有限公司 | Automatic cleaning and zero setting system for light ion organic volatile gas detector |
| CN103154690A (en) * | 2010-09-30 | 2013-06-12 | 丰田自动车株式会社 | Leak inspection device and leak inspection method |
| CN104596799A (en) * | 2014-12-31 | 2015-05-06 | 聚光科技(杭州)股份有限公司 | Sampling analysis system and detection method |
| CN110274737A (en) * | 2019-07-25 | 2019-09-24 | 北京海研自动化科技有限公司 | A kind of refrigeration appliance compressor leak source detection system and detection method |
| CN114924040A (en) * | 2022-05-19 | 2022-08-19 | 厦门海腾发动机测试设备有限公司 | Automatic switching and sampling tube purifying device for multi-concentration calibration gas of tail gas analyzer |
-
2005
- 2005-06-08 CN CN 200520023014 patent/CN2800278Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154690A (en) * | 2010-09-30 | 2013-06-12 | 丰田自动车株式会社 | Leak inspection device and leak inspection method |
| CN103154690B (en) * | 2010-09-30 | 2015-06-17 | 丰田自动车株式会社 | Leak inspection device and leak inspection method |
| CN103018164A (en) * | 2012-12-06 | 2013-04-03 | 深圳市南油诺安电子有限公司 | Automatic cleaning and zero setting system for light ion organic volatile gas detector |
| CN104596799A (en) * | 2014-12-31 | 2015-05-06 | 聚光科技(杭州)股份有限公司 | Sampling analysis system and detection method |
| CN110274737A (en) * | 2019-07-25 | 2019-09-24 | 北京海研自动化科技有限公司 | A kind of refrigeration appliance compressor leak source detection system and detection method |
| CN114924040A (en) * | 2022-05-19 | 2022-08-19 | 厦门海腾发动机测试设备有限公司 | Automatic switching and sampling tube purifying device for multi-concentration calibration gas of tail gas analyzer |
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Legal Events
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Owner name: JIADAO TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING JINKAIXING SCIENCE AND TECHNOLOGY CO., LTD. Effective date: 20100528 |
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Free format text: CORRECT: ADDRESS; FROM: 100037 ROOM 7008, BLOCK A, ZHONGJIAN BUILDING, NO.15, SANLIHE ROAD, HAIDIANDISTRICT, BEIJING BEIJING JINKAIXING SCIENCE AND TECHNOLOGY CO., LTD. TO: 101111 ROOM 1510, BUILDING 1, NO.99, KECHUANGSHISI STREET, BEIJING ECONOMIC DEVELOPMENT ZONE, BEIJING |
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Effective date of registration: 20100528 Address after: Branch of Beijing Economic Development Zone Beijing City fourteen street 101111 No. 99 Building No. 1 room 1510 Patentee after: Jiadao Science & Technology Co., Ltd. Address before: The Three River Road 100037 Beijing city Haidian District No. 15 building A room 7008 Beijing jinkaixing science and Technology Co Ltd Patentee before: Beijing Jinkaixing Tech Co., Ltd. |
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Owner name: JINKAIXING SCIENCE + TECHNOLOGY CO., LTD., BEIJING Free format text: FORMER OWNER: JIADAO TECHNOLOGY CO., LTD. Effective date: 20121116 |
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Free format text: CORRECT: ADDRESS; FROM: 101111 TONGZHOU, BEIJING TO: 100873 HAIDIAN, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20121116 Address after: 100873 Friendship Hotel Beijing, 64132 South Avenue, Beijing, Haidian District, room number, room number two, Zhongguancun Patentee after: Beijing Jinkaixing Tech Co., Ltd. Address before: Branch of Beijing Economic Development Zone Beijing City fourteen street 101111 No. 99 Building No. 1 room 1510 Patentee before: Jiadao Science & Technology Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: ROAD LEADER (SHANDONG) TESTING TECHNOLOGY CO., LTD Free format text: FORMER OWNER: JINKAIXING SCIENCE + TECHNOLOGY CO., LTD., BEIJING Effective date: 20121126 |
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Free format text: CORRECT: ADDRESS; FROM: 100873 HAIDIAN, BEIJING TO: JINAN, SHANDONG PROVINCE |
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Effective date of registration: 20121126 Address after: Room two, office building, 211 floor, East Gate building, Ji'nan export processing zone, hi tech Zone, Shandong, Ji'nan Patentee after: Drive road (Shandong) Inspection Technology Co., Ltd. Address before: 100873 Friendship Hotel Beijing, 64132 South Avenue, Beijing, Haidian District, room number, room number two, Zhongguancun Patentee before: Beijing Jinkaixing Tech Co., Ltd. |
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Expiration termination date: 20150608 Granted publication date: 20060726 |