Aerosol particulate matter dilution adjusting device applied to automobile exhaust detection calibrator

Abstract

An aerosol particulate matter dilution adjusting device applied to an automobile exhaust detection calibrator belongs to the technical field of auxiliary equipment of the automobile exhaust detection calibrator and comprises a shell, a dryer, a moisture filter, an aerosol filter, a needle valve and a four-way pipe, and the dryer, the moisture filter, the aerosol filter, the needle valve and the four-way pipe are mounted in the shell. The device is used in cooperation with calibration equipment and an automobile exhaust detection analyzer for detection, and under the action of a dryer, a moisture filter, an aerosol filter, a needle valve and the like; aerosol particulate matters output by an aerosol particulate matter generator can be effectively diluted (opening and closing degrees of valve cores of two needle valves are respectively adjusted, and different proportions of the aerosol particulate matters and air entering calibration equipment and an automobile exhaust detection analyzer can be adjusted) and moisture can be removed; and it is ensured as much as possible that the calibration equipment and the automobile exhaust detection analyzer detect the aerosol particulate matter data to be real and effective. In conclusion, the device has a good application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the auxiliary equipment technical field that automobile exhaust detection calibrator uses, especially aerosol particulate matter dilution adjusting device that a kind of automobile exhaust detection calibrator is applied. BACKGROUND

[0002] The automobile using traditional energy as fuel (such as gasoline, diesel, natural gas etc.), its work will produce a large amount of carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO2), methane (CH4), propane (C3H8) and a large amount of carbon dioxide (CO2) etc. Gaseous pollutants and aerosol particulate matter. Therefore, in the development, maintenance stage of engine, and subsequent vehicle life stage, need to reduce the emission amount of gaseous pollutants and aerosol particulate matter as far as possible. Therefore, through automobile exhaust detection analyzer to the emission pollutants of automobile, exhaust fault is handled in time, and it is very important to reduce the emission amount of pollution exhaust. The detection function of automobile exhaust detection analyzer is more, and aerosol particulate matter data amount in vehicle exhaust is one of important detection indexes. In prior art, in order to guarantee the detection accuracy of exhaust detection analyzer for vehicle emission aerosol particulate matter data etc., quality monitoring department needs to adopt calibration equipment to calibrate the detection performance of automobile exhaust detection analyzer, and calibration equipment is actually a standard automobile exhaust detection analyzer (and automobile exhaust detection analyzer function is identical, only precision is higher, and working performance is more stable, and standard automobile exhaust detection analyzer itself is applied for a period of time, and also needs other standard automobile exhaust detection analyzer to calibrate its detection performance) that is identified by relevant quality monitoring department, and in specific application, calibration equipment and the automobile exhaust detection analyzer to be detected simultaneously detect exhaust of vehicle, if the exhaust data detected by two is close, it represents that the performance of automobile exhaust detection analyzer to be detected is stable, and the data detected is real and effective, otherwise, it represents that the performance of automobile exhaust detection analyzer to be detected is unstable, and the data detected is inaccurate (prompting detection department to maintain automobile exhaust detection analyzer).

[0003] The current calibration equipment actually detects and calibrates the automobile exhaust detection analyzer, and for the aerosol particle data detection performance of automobile exhaust, an aerosol particle generator is equipped to generate aerosol particles (by using sodium chloride and water solution as raw materials to generate aerosol particles) to synchronously enter the air inlet pipe of the calibration equipment and the automobile exhaust detection analyzer to be detected. Since the aerosol particles generated by the aerosol particle generator are constant, if the calibration equipment and the automobile exhaust detection analyzer to be calibrated can input gas with different aerosol particle contents for detection and calibration (for example, gas containing 40%, 30% and 20% aerosol particles), better calibration comparison effect can be achieved. The existing aerosol particle generator cannot effectively dilute the aerosol particles (only the valve opening size of the output end can be adjusted to adjust the output amount of the aerosol particles), so that the calibration work is adversely affected. In addition, when the aerosol particle generator works, the aerosol particles contain water molecules. Since the existing calibration equipment does not have a water removal function, the aerosol particles containing water enter the calibration equipment and the automobile exhaust detection analyzer, and the probability of deviation of the detection data exists, and the water also adversely affects the internal components of the calibration equipment and the automobile exhaust detection analyzer (such as causing the insulation of electronic components to deteriorate). Content of the utility model

[0004] In order to overcome the disadvantages of the existing calibration equipment without a suitable mechanism to dilute and remove water from the aerosol particles output by the aerosol particle generator, the utility model provides a kind of aerosol particle dilution adjusting device applied to automobile exhaust detection calibration instrument, which can be used in conjunction with calibration equipment and automobile exhaust detection analyzer for detection, can effectively dilute and remove water from the aerosol particles (including air) output by the aerosol particle generator, and can ensure the real and effective detection of aerosol particle data by calibration equipment and automobile exhaust detection analyzer as much as possible.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] The application relates to an aerosol particle dilution adjusting device applied to a vehicle exhaust detection calibrator, which comprises a shell, dryers, moisture filters, aerosol filters, needle valves and a four-way pipe, the dryers and the needle valves are at least two, the moisture filter is installed at the outer upper end of the shell, the air inlet pipe of the moisture filter is connected with the gas output pipe of an aerosol particle generator, the dryers respectively comprise dry cylinders and drying agents, the inner side of the dry cylinder is provided with a drying agent cavity, the drying agent is arranged in the drying agent cavity, and the air inlet pipe A and the air outlet pipe A are respectively arranged on the upper and lower ends of the dry cylinder; the two sets of dry cylinders are respectively arranged at the rear end in the shell, the air inlet pipe A of the first set of dry cylinders is connected with the air outlet pipe of the moisture filter, the air outlet pipe A of the first set of dry cylinders is connected with the air inlet pipe A of the second set of dry cylinders, and the air outlet pipes A of the second set of dry cylinders are connected with the air inlet ends of the two needle valves in parallel; the aerosol filter is arranged at the front end in the shell, the air outlet end of the first needle valve is connected with the air inlet pipe of the aerosol filter, the air outlet end of the second needle valve, the air outlet pipe of the aerosol filter and the two interfaces of the upper end and the lower end of the four-way pipe are connected, the air outlet pipe of the four-way pipe is respectively provided with an air release pipe and a sample gas pipe, and the lower end of the sample gas pipe is connected with the air inlet pipes of the calibrator and the vehicle exhaust detection analyzer in parallel.

[0007] Further, the inner side surface of the fixing ring is distributed with a plurality of water absorption holes, and the drying agent is color-changing silica gel.

[0008] Further, the needle valve can also adopt an electric proportional valve.

[0009] Further, the moisture filter is internally provided with a plurality of cotton cloth water absorption filter cores.

[0010] Further, the adjusting handle of the needle valve is located outside the shell.

[0011] Further, the front side end of the shell is hingedly provided with a movable door.

[0012] Compared with the prior art, the novel calibrator has the advantages that: in cooperation with the calibrator and the vehicle exhaust detection analyzer, the aerosol particle generator output aerosol particles can be effectively diluted (the opening and closing degrees of the valve cores of the two needle valves can be adjusted, and the different proportion of the aerosol particles and air entering the calibrator and the vehicle exhaust detection analyzer can be adjusted) and moisture can be removed, so that the data of the aerosol particles detected by the calibrator and the vehicle exhaust detection analyzer are real and effective. BRIEF DESCRIPTION OF DRAWINGS

[0013] The novel calibrator will be further described below in combination with the drawings and examples.

[0014] Figure 1 It is a whole plane structure schematic diagram of the novel calibrator.

[0015] Figure 2 It is the whole three-dimensional structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 、 2 As shown in the figure, an aerosol particle dilution adjusting device applied to an automobile exhaust detection calibration instrument, comprising a shell 1, dryers 21 and 22, a moisture filter 3, an aerosol filter 4, needle valves 51 and 52, a four-way pipe 6, three-way pipes 71 and 72, the dryers, needle valves, three-way pipes are two respectively, the lower end of the moisture filter 3 is fixedly installed at the outer middle part of the upper end of the shell 1, the air inlet pipe of the moisture filter 3 and the gas output pipe of the aerosol particle generator (not shown in the figure) are fixedly connected through the pipeline, two sets of dryers 21 and 22 respectively comprise a drying cylinder 23 and a drying agent 25, the inside of the drying cylinder 23 is welded with a hollow annular fixing ring 24, the upper and lower ends of the fixing ring 24 are sealed with the inside of the drying cylinder 23, the cavity between the outside of the fixing ring 24 and the inside of the drying cylinder 23 is used as a drying agent cavity, a plurality of drying agents 25 are placed in the drying agent cavity, an air inlet pipe A and an exhaust pipe A which are communicated with the inside of the drying cylinder 23 are respectively welded on the upper and lower ends of the drying cylinder 23; the two sets of drying cylinders 21 and 22 are respectively fixedly installed at the left middle part of the rear end of the shell 1, the air inlet pipe A of the first set of drying cylinders 21 and the exhaust pipe of the moisture filter 3 are fixedly connected through the pipeline, the exhaust pipe A of the first set of drying cylinders 21 and the air inlet pipe A of the second set of drying cylinders 22 are fixedly connected through the pipeline, the exhaust pipe A of the second set of drying cylinders 22 and the first end of the first three-way pipe 71 are threadedly connected, the second end and the third end of the first three-way pipe 71 and the air inlet ends of the two needle valves 51 and 52 are respectively connected through the pipeline; the front outside of the aerosol filter 4 is fixedly installed at the front end of the shell 1, the exhaust end of the first needle valve 51 and the air inlet pipe of the aerosol filter 4 are connected through the pipeline, the exhaust pipe of the aerosol filter 4, the exhaust end of the second needle valve 52 and the two interfaces of the upper end and the lower end of the four-way pipe 6 are respectively connected through the pipeline, a gas exhaust pipe 8 and a sample gas pipe 9 are respectively threadedly installed in the left end and the right end of the four-way pipe 6, the lower ends of the gas exhaust pipe 8 and the sample gas pipe 9 are respectively located at the middle part of the lower side and the outer right end of the shell 1, the lower end of the sample gas pipe 9 and the first end of the second three-way pipe 72 are threadedly connected, the second end, the third end of the second three-way pipe 72 and the air inlet pipe of the calibration equipment and the automobile exhaust detection analyzer (not shown in the figure) are respectively connected through the pipeline.

[0017] Figure 1 、 2As shown in the figure, the inner surface of the fixed ring is provided with a plurality of water-absorbing holes with inner diameter smaller than the outer diameter of the desiccant. The desiccant 25 is a color-changing silica gel. The needle valves 51 and 52 can also be electric proportional valves. The water filter 3 is internally provided with a plurality of layers of cotton water-absorbing filter cores. The adjusting handles of the two needle valves 51 and 52 are respectively located outside the lower end of the shell. The aerosol filter 4 is a finished aerosol filter product of model 9900-05-BKABB. A movable door 101 is hingedly installed at the front side end of the shell.

[0018] Figure 1 、 2As shown, the new cooperative calibration device and automobile exhaust detection analyzer are used for detection. The mixed gas containing aerosol particles output by the aerosol particle generator is preliminarily filtered to remove water through the water filter 3 (the filter element can be taken out and dried for reuse when the water content is too high), and then enters the first dryer 21. The drying agent 25 (the drying agent 25 can be taken out of the dryer and dried for reuse when the water content is too high) of the dryers 21 and 22 performs two-stage water adsorption on the entering mixed gas (two-stage water adsorption has better effect), so that the water in the mixed gas containing aerosol particles is basically removed and enters the subsequent components. The mixed gas containing aerosol particles after water removal enters the aerosol filter 4 and the gas inlet end of the second needle valve 72, and then the aerosol filter 4 filters out the aerosol particles in the entering mixed gas and outputs to the upper end of the four-way joint 6. Specifically, when the valve core opening and closing degree of the large or small needle valve 71 is adjusted by the detection personnel, the amount of the mixed gas after water removal entering the aerosol filter 4 can be adjusted. The larger the amount of the gas entering the aerosol filter 4, the smaller the amount of the mixed gas distributed to the gas inlet end of the needle valve 72, and the relatively less the aerosol particle content input into the calibration device and the automobile exhaust detection analyzer through the fourth end of the subsequent four-way pipe. The smaller the amount of the gas entering the aerosol filter 4, the larger the amount of the mixed gas distributed to the gas inlet end of the needle valve 72, and the relatively more the aerosol particle content input into the calibration device and the automobile exhaust detection analyzer through the fourth end of the subsequent four-way pipe. The adjustment purpose of inputting gas with different aerosol particle contents to the calibration device and the calibrated automobile exhaust detection analyzer is achieved. Specifically, when the valve core opening and closing degree of the large or small needle valve 72 is adjusted by the detection personnel, the amount of the mixed gas after water removal entering the lower end of the four-way pipe can be adjusted. The larger the amount of the entering mixed gas, the smaller the amount of the mixed gas distributed to the aerosol filter 4, and the relatively less the aerosol particle content input into the calibration device and the automobile exhaust detection analyzer through the fourth end of the subsequent four-way pipe. The smaller the amount of the entering mixed gas, the larger the amount of the mixed gas distributed to the aerosol filter 4, and the relatively more the aerosol particle content input into the calibration device and the automobile exhaust detection analyzer through the fourth end of the subsequent four-way pipe. The adjustment purpose of inputting gas with different aerosol particle contents to the calibration device and the calibrated automobile exhaust detection analyzer is also achieved (the adjustment of the two needle valves can achieve more accurate adjustment, and the purpose of adjusting the proportion of the aerosol particle content gas entering the calibration device and the calibrated automobile exhaust detection analyzer).When the upper end and the lower end of the four-way joint enter the mixed gas containing aerosol particles, if the gas flow and pressure are too large, the excess gas will be discharged to the atmosphere from the gas discharge pipe 8, reducing the interference of high pressure and high flow gas on the calibration equipment and the automobile exhaust detection analyzer.

[0019] The basic principle and main features of the present application and the advantages of the present application are shown and described above, for those skilled in the art, it is obvious that the present application is limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0020] In addition, it should be understood that, although the present application is described in the form of an embodiment, the embodiment does not contain only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An aerosol particulate matter dilution and adjustment device for use in automotive exhaust gas testing and calibration instruments, comprising a housing, a dryer, a moisture filter, an aerosol filter, a needle valve, and a four-way pipe, characterized in that, The dryer and needle valve are each provided in at least two configurations. A moisture filter is installed on the upper part of the housing. The inlet pipe of the moisture filter is connected to the gas output pipe of the aerosol particulate generator. The dryer includes a drying cylinder and a desiccant. The inner side of the drying cylinder has a desiccant chamber, in which the desiccant is placed. An inlet pipe A and an exhaust pipe A are respectively installed on the upper and lower ends of the drying cylinder. The two sets of drying cylinders are respectively installed at the rear end of the housing. The inlet pipe A of the first drying cylinder is connected to the exhaust pipe of the moisture filter. The exhaust pipe of the first drying cylinder... Pipe A is connected to the inlet pipe A of the second set of drying cylinders. The exhaust pipe A of the second set of drying cylinders is connected in parallel to the inlet ends of the two needle valves. The aerosol filter is installed at the front end inside the housing. The exhaust end of the first needle valve is connected to the inlet pipe of the aerosol filter. The exhaust pipe of the aerosol filter, the exhaust end of the second needle valve, and the upper and lower interfaces of the four-way pipe are connected respectively. The two end interfaces of the four-way pipe are respectively equipped with vent pipes and sample gas pipes. The lower end of the sample gas pipe is connected in parallel to the inlet pipe of the calibration equipment and the automobile exhaust gas detector and analyzer.

2. The aerosol particulate matter dilution and adjustment device for use in an automotive exhaust gas testing and calibration instrument according to claim 1, characterized in that, The inner surface of the retaining ring has multiple water absorption holes, and the desiccant is color-changing silica gel.

3. The aerosol particulate matter dilution and adjustment device for use in an automotive exhaust gas testing and calibration instrument according to claim 1, characterized in that, Needle valves can also be electrically proportional valves.

4. The aerosol particulate matter dilution and adjustment device for use in an automotive exhaust gas testing and calibration instrument according to claim 1, characterized in that, The moisture filter has multiple layers of absorbent cotton cloth filter elements inside.

5. The aerosol particulate matter dilution and adjustment device for use in an automotive exhaust gas testing and calibration instrument according to claim 1, characterized in that, The adjustment handle of the needle valve is located outside the housing.

6. The aerosol particulate matter dilution and adjustment device for use in an automotive exhaust gas testing and calibration instrument according to claim 1, characterized in that, A hinged door is installed at the front end of the housing.

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