Wide-range ammonia concentration measuring device

Abstract

The utility model belongs to the technical field of ammonia concentration measurement, particularly relates to a wide-range ammonia concentration measuring device, and aims to solve the problems of small measuring range and frequent maintenance of the conventional ammonia concentration measuring equipment. The particulate matter mass measuring equipment comprises a first power supply, a first switch and a signal interface, a sampling dilution channel is mounted at the upper part of the particulate matter mass measuring equipment, a sampling pipe is fixedly mounted at the front end of the sampling dilution channel, and a diluted sample gas outlet is formed in the bottom of the particulate matter mass measuring equipment; the diluted sample gas outlet is connected with a heating sampling pipe, the heating sampling pipe is connected with an ammonia analyzer, a first compressed air connector is arranged at the bottom of the particulate matter mass measuring equipment, and the device is large in measuring range and stable in measurement and meets the daily use condition of a laboratory.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia concentration measurement, in particular to a large-range ammonia concentration measuring device. Background Art

[0002] Large-range ammonia concentration measuring device: It is used to dilute the engine exhaust gas sample before measuring and output the actual measurement value to the test bench to meet the experimental needs. However, the existing ammonia concentration measuring equipment has a small range and cannot meet the specific experimental measurement needs. During long-term use in the laboratory, the equipment filter, gas pipeline and laser are often contaminated by the sample gas, which will have a certain impact on the service life of the measuring equipment. If the fault is not handled in time, it may also affect the engine experimental data, and frequent maintenance and replacement of consumables wastes resources. Utility Model Content

[0003] The utility model aims to solve the shortcomings of ammonia concentration measuring equipment, such as small measuring range and frequent maintenance, and proposes a large-range ammonia concentration measuring device.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A large-range ammonia concentration measuring device comprises a particulate matter mass measuring device, the particulate matter mass measuring device comprises a first power supply, a first switch, and a signal interface, a sampling dilution channel is installed on the upper part of the particulate matter mass measuring device, a sampling tube is fixedly installed at the front end of the sampling dilution channel, a diluted sample gas outlet is provided at the bottom of the particulate matter mass measuring device, a heated sampling tube is connected to the diluted sample gas outlet, and an ammonia analyzer is connected to the heated sampling tube, and a first compressed air interface is provided at the bottom of the particulate matter mass measuring device.

[0006] Preferably, the ammonia analyzer includes an analog signal interface, a second power supply, a second switch and a display screen, and the bottom of the ammonia analyzer is provided with a second compressed air interface, a zero gas interface and a standard gas interface.

[0007] Preferably, the signal interface of the particle mass measuring device is connected to an external host computer.

[0008] Preferably, the analog signal interface of the ammonia analyzer is connected to a stand.

[0009] The particulate matter mass measuring device is connected to the engine exhaust pipe by a sampling tube. After diluting the exhaust gas sample emitted by the engine, the diluted sample gas is measured again by the ammonia analyzer. The particulate matter mass measuring device and the ammonia analyzer are connected by a heated sampling tube. The particulate matter mass measuring device can set a fixed sampling dilution ratio Q through the program of the external host computer to dilute the sample gas in proportion. The data of the diluted sample gas measured by the ammonia analyzer is output to the test bench through the analog signal interface.

[0010] The experimental measurement results are achieved by connecting the particulate matter mass measurement equipment and the ammonia analyzer with a sampling tube. Both devices have compressed air interfaces, which are used to purge the equipment and drive the pneumatic valves inside the equipment. The ammonia analyzer has an ammonia standard gas interface and a zero gas interface, which are used to check and calibrate the equipment before the experiment to ensure the accuracy of the subsequent experimental measurement data. The particulate matter mass measurement equipment can set the sampling dilution ratio Q to dilute the high-concentration exhaust gas emitted by the engine. The pollutant concentration of the diluted sample gas is low, and the impact on the parts loss of the measuring equipment is relatively small. The ammonia analyzer then collects the diluted sample gas and outputs the results, thereby achieving the measurement data required for the experiment, achieving the experimental goals, and improving work efficiency, which is in line with the daily use of the laboratory. The ammonia analyzer includes a display screen, which is a touch screen. The device parameters of the ammonia analyzer can be changed in real time through the touch screen, without the need for an external computer network setting. The dilution ratio Q can be modified in real time in the bench operation room through an external host computer, and the sampling data can be viewed.

[0011] Compared with the prior art, the advantages of the utility model are:

[0012] The utility model can reduce the pollution loss of parts of the measuring equipment and the waste of consumables by diluting the engine exhaust, and can also measure the ammonia value of the high-concentration exhaust gas of the engine to meet the experimental needs. The fixed positions of the two devices are independent of each other, which is convenient for mobile replacement, conforms to the daily use of the laboratory, and is convenient to use. By combining and connecting the two measuring devices, the respective measurement data can be viewed in real time, which can achieve the purpose of facilitating troubleshooting and maintenance, reduce workload, and improve troubleshooting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of the structure of the utility model;

[0014] Figure 2 It is a front view of the particle mass measuring device of the utility model structure;

[0015] Figure 3 This is a front view of the ammonia analyzer of the utility model structure;

[0016] Figure 4 It is a side view of the structure of the utility model.

[0017] In the figure: 1. Particle mass measurement equipment; 2. Ammonia analyzer; 3. Heated sampling tube; 4. Dilution channel; 5. Sampling tube; 6. Second compressed air interface; 7. Zero gas interface; 8. Standard gas interface; 9. Analog signal interface; 10. Second power supply; 11. Second switch; 12. Display screen; 13. Dilution sample gas outlet; 14. First compressed air interface; 15. First power supply; 16. Signal interface; 17. First switch. DETAILED DESCRIPTION

[0018] The technical solution of this embodiment will be clearly and completely described below in conjunction with the drawings in this embodiment. Obviously, the described embodiment is only a part of this embodiment, rather than all of the embodiments.

[0019] Reference Figure 1-Figure 4 A large-range ammonia concentration measuring device includes a particle mass measuring device 1, the particle mass measuring device 1 includes a first power supply 15, a first switch 17, and a signal interface 16. A sampling dilution channel 4 is installed on the upper part of the particle mass measuring device 1, and a sampling tube 5 is fixedly installed at the front end of the sampling dilution channel 4. A diluted sample gas outlet 13 is provided at the bottom of the particle mass measuring device 1, and the diluted sample gas outlet 13 is connected to a heated sampling tube 3, and the heated sampling tube 3 is connected to an ammonia analyzer 2. A first compressed air interface 14 is provided at the bottom of the particle mass measuring device 1.

[0020] In this embodiment, the ammonia analyzer 2 includes an analog signal interface 9, a second power supply 10, a second switch 11 and a display screen 12. The bottom of the ammonia analyzer 2 is provided with a second compressed air interface 6, a zero gas interface 7 and a standard gas interface 8.

[0021] In this embodiment, the signal interface 16 of the particle mass measuring device 1 is connected to an external host computer.

[0022] In this embodiment, the analog signal interface 9 of the ammonia analyzer 2 is connected to the stand.

[0023] The heated sampling tube 3 is detachable and can be disassembled for internal pipe purging or cleaning after long-term use; the sampling dilution channel 4 is detachable, which is convenient for disassembly, cleaning and mobile transportation; universal wheels are installed at the bottom of both devices for easy mobile installation, which meets the daily use conditions of the laboratory and is easy to use.

[0024] See also Figure 2 and Figure 3 The two devices are independent of each other and can be used in combination or independently of each other according to experimental requirements, which can meet a variety of experimental measurement needs.

[0025] Brief description of the usage process: After the two devices are started up and warmed up, the ammonia analyzer is calibrated with zero gas and standard gas, the dilution ratio Q of the particulate matter mass measurement device is set, and the particulate matter mass measurement device is used to sample high-concentration ammonia standard gas (for example, 10000ppm ammonia standard gas). The ammonia analyzer then samples the sample gas diluted by the particulate matter mass measurement device to obtain the ammonia value (10000ppm / Q) to verify the measurement accuracy of the device, facilitate daily calibration verification, improve the accuracy of subsequent experimental data, and meet the daily use of the laboratory.

[0026] The above is only a preferred specific implementation of this embodiment, but the protection scope of this embodiment is not limited to this. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of this embodiment within the technical scope disclosed in this embodiment, which should be covered by the protection scope of this embodiment.

Claims

1. A large-range ammonia concentration measuring device, comprising a particle mass measuring device (1), characterized in that: The particle mass measuring device (1) comprises a first power supply (15), a first switch (17), and a signal interface (16). A sampling dilution channel (4) is installed on the upper part of the particle mass measuring device (1), a sampling tube (5) is fixedly installed at the front end of the sampling dilution channel (4), a diluted sample gas outlet (13) is provided at the bottom of the particle mass measuring device (1), the diluted sample gas outlet (13) is connected to a heated sampling tube (3), and the heated sampling tube (3) is connected to an ammonia analyzer (2). A first compressed air interface (14) is provided at the bottom of the particle mass measuring device (1).

2. A large-range ammonia concentration measuring device according to claim 1, characterized in that: The ammonia analyzer (2) comprises an analog signal interface (9), a second power supply (10), a second switch (11) and a display screen (12). The bottom of the ammonia analyzer (2) is provided with a second compressed air interface (6), a zero gas interface (7) and a standard gas interface (8).

3. A large-range ammonia concentration measuring device according to claim 2, characterized in that: The signal interface (16) of the particle mass measuring device (1) is connected to an external host computer.

4. A large-range ammonia concentration measuring device according to claim 3, characterized in that: The analog signal interface (9) of the ammonia analyzer (2) is connected to a stand.

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