A universal device for automatically evaluating the performance of volatile organic compound analyzers

Abstract

The present invention proposes a general device for automatically evaluating the performance of a volatile organic compound analyzer, comprising a main control module, a switch valve, a gas circuit control module, a rotary valve group module, a gas analyzer and an analysis module; the main control module controls the opening and closing of the switch valve and realizes the switching of the gas circuit control module; the main control module receives the output signal of the analysis module; the switch valve controls the on and off of the gas circuit control module; the rotary valve group module receives the signal of the gas circuit control module to realize multi-gas circuit conversion; the gas outlet of the rotary valve group module is connected to the input end of the gas analyzer; the gas analyzer tests the input gas and transmits the test signal to the analysis module; the analysis module compares and analyzes various indicators of the standard gas and the sample gas. The present invention can be used to automatically evaluate and monitor the performance of the volatile organic compound analyzer, without the need for manual regular standard gas verification, reducing the workload of operators, making its monitoring results more reliable, and improving the efficiency and objectivity of the evaluation.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a universal device for automatically evaluating the performance of a volatile organic compound analyzer. Background Art

[0002] At present, the existing technology only requires manual inspection of the standard gas of the volatile organic compound analysis instrument regularly to ensure the validity of the data. However, due to the workload, it is actually impossible for manual inspection to be carried out every day. Sometimes, inspection is not carried out for a long time, resulting in some monitoring data that is actually invalid data being included in the valid data, affecting the monitoring effect of the organic compound analysis instrument.

[0003] With the release of national standards (HJ 1012-2018 / HJ 1013-2018), the market requirements for volatile organic compound analysis instruments have become more stringent and standardized, which has led to the need to evaluate various performance indicators of the instrument. Summary of the invention

[0004] The purpose of the present invention is to provide a general device for automatically evaluating the performance of a volatile organic compound analyzer, so as to solve the tediousness of manual evaluation in the prior art and improve the efficiency and objectivity of the evaluation. To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A general device for automatically evaluating the performance of a volatile organic compound analyzer, comprising a main control module, a switch valve, a gas path control module, a rotary valve group module, a gas analyzer and an analysis module;

[0006] The main control module controls the opening and closing of the switch valve and realizes the switching of the gas circuit control module; the main control module receives the output signal of the analysis module;

[0007] The switch valve controls the on-off of the gas circuit control module;

[0008] The rotary valve group module receives the signal of the gas path control module to realize multi-gas path conversion; the gas outlet of the rotary valve group module is connected to the input end of the gas analyzer; the gas analyzer tests the input gas and transmits the test signal to the analysis module; the analysis module compares and analyzes various indicators of the standard gas and the sample gas;

[0009] The rotary valve group module includes a plurality of first rotary valves, a plurality of second rotary valves and a gas circuit unit; the gas flows from the first rotary valve to the second rotary valve through the gas circuit unit;

[0010] Part of the first rotary valves are provided with sample gas ports; the rest of the first rotary valves are provided with standard gas ports; and the second rotary valves are provided with gas outlets corresponding to the sample gas ports and the standard gas ports respectively;

[0011] The air inlet end of the air circuit unit is connected to the sample air port and the standard air port respectively; the air outlet end of the air circuit unit is connected to the air outlet;

[0012] The gas circuit unit includes a plurality of air inlet pipelines, a first branch pipeline, a transition pipeline, a second branch pipeline and a plurality of air outlet pipelines;

[0013] Wherein, a transition pipeline is provided between the first branch pipeline and the second branch pipeline; the first branch pipeline is connected with the sample gas port and the standard gas port; the second branch pipeline is connected with the gas outlet;

[0014] The air inlet pipeline is arranged at the sample gas port and the standard gas port;

[0015] The air outlet pipeline is arranged at the air outlet.

[0016] Preferably, it further comprises a base; the first rotary valve is arranged on the base.

[0017] Preferably, the transition pipeline is arranged in the middle position of the base.

[0018] Preferably, a mass flow meter is provided on the transition pipeline.

[0019] Preferably, the first rotary valve is a three-way valve.

[0020] Preferably, the first rotary valves are located on the same horizontal line.

[0021] Preferably, the second rotary valves are located on the same horizontal line.

[0022] Compared with the prior art, the advantages of the present invention are as follows: the present invention can be used to automatically evaluate and monitor the performance of a volatile organic compound analyzer without the need for manual regular calibration gas verification, thereby reducing the workload of operators, making the monitoring results more reliable, and improving the efficiency and objectivity of the evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural framework diagram of a general device for automatically evaluating the performance of a volatile organic compound analyzer according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Structural diagram of the transfer valve module.

[0025] Among them, 1-main control module, 2-switch valve, 3-gas path control module, 4-rotary valve group module, 41-first rotary valve, 42-second rotary valve, 43-inlet pipeline, 44-first branch pipeline, 45-transition pipeline, 46-second branch pipeline, 47-outlet pipeline, 48-base, 5-gas analyzer, 6-analysis module, 7-mass flow meter, 8-sample gas port, 9-standard gas port, 10-outlet. DETAILED DESCRIPTION

[0026] The general device for automatically evaluating the performance of a volatile organic compound analyzer of the present invention will be described in more detail below in conjunction with a schematic diagram, wherein preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art may modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being broadly known to those skilled in the art and not as a limitation of the present invention.

[0027] like Figure 1 As shown, this embodiment proposes a general device for automatically evaluating the performance of a volatile organic compound analyzer, comprising a main control module 1, a switch valve 2, a gas circuit control module 3, a rotary valve group module 4, a gas analyzer 5 and an analysis module 6; wherein the main control module 1 controls the opening and closing of the switch valve 2 and realizes the switching of the gas circuit control module 3; the switch valve 2 controls the on-off of the gas circuit control module 3, that is, the main control module 1 closes the switch valve 2, the switch valve 2 is connected to the gas circuit control module 3, the main control module 1 sends a switching signal to the gas circuit control module 3, and the gas circuit control module 3 controls The rotary valve group module 4 realizes multiple gas path conversions; the rotary valve group module 4 receives the signal of the gas path control module 3 to realize multi-gas path conversion; the gas outlet end of the rotary valve group module 4 is connected to the input end of the gas analyzer 5, and the rotary valve group module 4 outputs standard gas and sample gas to the analyzer for analysis and detection; the gas analyzer 5 tests the input gas and transmits the test signal to the analysis module 6; the analysis module 6 compares and analyzes various indicators of the standard gas and the sample gas, and then feeds back the completion signal to the main control module 1, and the main control module 1 sends a switching signal to realize the input, analysis and comparison of other gases.

[0028] like Figure 2As shown, the rotary valve group module 4 can realize the connection between different sample gas sources and the gas analyzer 5. The rotary valve group module 4 includes a plurality of first rotary valves 41, a plurality of second rotary valves 42 and a gas circuit unit; the gas flows from the first rotary valve 41 to the second rotary valve 42 through the gas circuit unit; wherein, a sample gas port 8 is provided on a part of the first rotary valves 41; a standard gas port 9 is provided on the other first rotary valves 41; a gas outlet 10 corresponding to the sample gas port 8 and the standard gas port 9 is provided on the second rotary valve 42, that is, the first rotary valve 41 and the second rotary valve 42 are arranged correspondingly; the gas inlet end of the gas circuit unit is connected to the sample gas port 8 and the standard gas port 9 respectively; the gas outlet end of the gas circuit unit is connected to the gas outlet 10. Further, the gas circuit unit includes a plurality of inlet pipelines 43, a first branch pipeline 44, a transition pipeline 45, a second branch pipeline 46 and a plurality of outlet pipelines 47; wherein, the first branch pipeline 44 and the second branch pipeline 46 are provided with a transition pipeline 45; the first branch pipeline 44 is connected to the sample gas port 8 and the standard gas port 9; the second branch pipeline 46 is connected to the outlet port 10; the inlet pipeline 43 is arranged at the sample gas port 8 and the standard gas port 9; the outlet pipeline 47 is arranged at the outlet port 10. Take the introduction of standard gas as an example. The standard gas NMHC is introduced into the first rotary valve a, the sample gas is input into the first branch pipeline 44 and the transition pipeline 45 through an inlet pipe, the standard gas NMHC is input into a second rotary valve a′ through the transition pipeline 45, and then input into the gas analyzer 5 through the second branch pipeline 46 and an outlet pipeline 47. Among them, the second rotary valve a′ and the first rotary valve a are set correspondingly, and the other first rotary valves 41 and the second rotary valves 42 are also set correspondingly, that is, the gas entering a first rotary valve 41 needs to pass through the first branch pipeline 44, the transition pipeline 45, the second branch pipeline 46 and an outlet pipeline 47, and is output by the corresponding second rotary valve 42.

[0029] In this embodiment, a base 48 is further included; the first rotary valve 41 is disposed on the base 48 .

[0030] In this embodiment, the transition line 45 is disposed at a middle position of the base 48 .

[0031] In this embodiment, a mass flow meter 7 is provided on the transition pipeline 45 to detect the gas flow in the gas analyzer 5 to complete the measurement of flow-related indicators.

[0032] In this embodiment, the first rotary valve 41 is a three-way valve. Figure 2 As shown, when NMHC needs to be introduced, the first rotary valve 41 connects two of its openings to achieve the connection between an inlet pipeline 43 and a first branch pipeline 44; the second rotary valve 42 connects two of its openings to achieve the connection between a second branch pipeline 46 and an outlet pipeline 47. Similarly, the input process of various sample gases and standard gases is similar and will not be repeated here.

[0033] In this embodiment, the first rotary valve 41 is located on the same horizontal line, and the second rotary valve 42 is located on the same horizontal line.

[0034] In summary, in the universal device for automatically evaluating the performance of a volatile organic compound analyzer provided in an embodiment of the present invention, the present invention completes the state switching and gas path control of the rotary valve group module 4 according to the user's configuration, and provides a gas source and different standard gases for the evaluation instrument. The analysis module 6 is responsible for reading the analysis results from the analysis instrument and comparing them with the actual standard gas values, so as to evaluate whether the various indicators of the instrument meet the standard requirements. The present invention can be used to automatically evaluate and monitor the performance of a volatile organic compound analyzer without the need for manual regular standard gas verification, which reduces the workload of operators, makes the monitoring results more reliable, and improves the efficiency and objectivity of the evaluation.

[0035] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A general device for automatically evaluating the performance of a volatile organic compound analyzer, characterized in that: It includes a main control module, a switch valve, a gas circuit control module, a rotary valve group module, a gas analyzer and an analysis module; The main control module controls the opening and closing of the switch valve and realizes the switching of the gas circuit control module; the main control module receives the output signal of the analysis module; The switch valve controls the on-off of the gas circuit control module; The rotary valve group module receives the signal of the gas path control module to realize multi-gas path conversion; the gas outlet of the rotary valve group module is connected to the input end of the gas analyzer; the gas analyzer tests the input gas and transmits the test signal to the analysis module; the analysis module compares and analyzes various indicators of the standard gas and the sample gas; The rotary valve group module includes a plurality of first rotary valves, a plurality of second rotary valves and a gas circuit unit; the gas flows from the first rotary valve to the second rotary valve through the gas circuit unit; Part of the first rotary valves are provided with sample gas ports; the rest of the first rotary valves are provided with standard gas ports; and the second rotary valves are provided with gas outlets corresponding to the sample gas ports and the standard gas ports respectively; The air inlet end of the air circuit unit is connected to the sample air port and the standard air port respectively; the air outlet end of the air circuit unit is connected to the air outlet; The gas circuit unit includes a plurality of air inlet pipelines, a first branch pipeline, a transition pipeline, a second branch pipeline and a plurality of air outlet pipelines; Wherein, a transition pipeline is provided between the first branch pipeline and the second branch pipeline; the first branch pipeline is connected with the sample gas port and the standard gas port; the second branch pipeline is connected with the gas outlet; The air inlet pipeline is arranged at the sample gas port and the standard gas port; The air outlet pipeline is arranged at the air outlet.

2. The general device for automatically evaluating the performance of a volatile organic compound analyzer according to claim 1, characterized in that: It further includes a base; the first rotary valve is arranged on the base.

3. The general device for automatically evaluating the performance of a volatile organic compound analyzer according to claim 2, characterized in that: The transition pipeline is arranged at a middle position of the base.

4. The general device for automatically evaluating the performance of a volatile organic compound analyzer according to claim 1, characterized in that: A mass flow meter is arranged on the transition pipeline.

5. The general device for automatically evaluating the performance of a volatile organic compound analyzer according to claim 1, characterized in that: The first rotary valve is a three-way valve.

6. The general device for automatically evaluating the performance of a volatile organic compound analyzer according to claim 1, characterized in that: The first rotary valves are located on the same horizontal line.

7. The general device for automatically evaluating the performance of a volatile organic compound analyzer according to claim 1, characterized in that: The second rotary valves are located on the same horizontal line.

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