Automatic sampling and sample returning system for automatic analysis

Abstract

The invention belongs to the technical field of sampling analysis, particularly relates to an automatic sampling and sample returning system for automatic analysis, and provides the following scheme aiming at the problem of product loss caused by inconvenience in automatically feeding a detected sample back to a material pipe in the existing sampling detection process: the automatic sampling and sample returning system comprises a sample returning opening; the venturi tube is fixedly communicated with the sample return opening; the sampling port is provided with a filter, the filter is connected with the Venturi tube, the sampling port and the sample return port are connected with the same material pipeline, and a filter screen is connected in the filter; according to the automatic quantitative sampling system, quantitative sampling can be automatically carried out on the gravity conveying pipeline, the pressure conveying pipeline and the stock bin and conveyed to an analysis instrument, and after the analysis instrument completes detection, the system automatically returns the samples to the conveying pipeline or the stock bin.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling and analysis, and in particular to an automatic sampling and sample return system for automatic analysis. Background Art

[0002] In the petrochemical, pharmaceutical, and new energy industries, there are strict requirements for the quality of intermediate and final products, and each batch of products needs to be sampled and analyzed at different stages. The traditional sampling method is automatic or manual sampling, and then manually taking samples to the laboratory for analysis and testing. It has high requirements on personnel and high work intensity, and there is sample loss. Modern detection technology is constantly developing, and detection methods are constantly upgraded. There are now a variety of loss-free detection methods, such as spectral detection, nuclear magnetic detection, and X-ray detection. After these detection methods are used to test the samples, the composition and properties of the samples have not changed, and they can be returned to the production link for continued use.

[0003] In the prior art, during the sampling and testing process, it is not convenient to automatically return the tested samples to the material pipe, which leads to product loss. For this reason, we propose an automatic sampling and sample return system for automatic analysis to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that it is inconvenient to automatically return the tested samples to the material pipe during the sampling and testing process, which leads to product loss, and to propose an automatic sampling and sample return system for automatic analysis.

[0005] The automatic sampling and sample return system for automatic analysis provided in this application adopts the following technical solution:

[0006] An automatic sampling and sample return system for automatic analysis, comprising:

[0007] Return sample port;

[0008] A venturi tube, the venturi tube is fixedly connected with the sample return port;

[0009] The sampling port is provided with a filter, the filter is connected to the venturi tube, the sampling port and the return sample port are connected to the same material pipeline, and a filter screen is connected inside the filter;

[0010] The analyzer is connected with a sample delivery port, which is connected to one end of the venturi tube; the sample return port is connected with a gas source, which is connected to the venturi tube and the sampling port.

[0011] Furthermore, the sampling port is connected to a third functional valve and a manual sampling valve.

[0012] Furthermore, the sampling port is connected to a sample valve and a sampling valve, and the sampling port is connected to an artificial sampling port.

[0013] Furthermore, the venturi tube is connected to a first functional valve and a second functional valve.

[0014] Furthermore, the venturi tube and the sampling port are connected with a same connecting pipe.

[0015] Furthermore, the gas source is connected to a venturi tube gas supply valve, a sample delivery gas supply valve and a purge gas supply valve.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. This solution opens the Venturi tube air supply valve, opens the first function valve, opens the second function valve, closes the other valves, and turns the sampling valve to the vertical position. At this time, the airflow flows to the Venturi tube through the Venturi tube air supply valve, and the negative pressure port of the Venturi tube generates negative pressure. The negative pressure sucks up the material in the analyzer through the first function valve, the second function valve, and the sampling valve. The sample is blown back into the material pipeline through the sample return port along with the airflow;

[0018] 2. This solution opens the purge air supply valve and the sample valve, closes the other valves, and turns the sampling valve to the vertical position. At this time, the air flow blows air to the sample valve through the purge air supply valve, and the old sample is blown back into the material pipeline to achieve the cleaning purpose, effectively avoiding the problem of mixing old and new samples;

[0019] 3. This scheme opens the Venturi tube air supply valve, opens the sample air supply valve, opens the first function valve, opens the third function valve, closes the other valves, and opens the sampling valve to the horizontal position. At this time, the airflow flows to the Venturi tube through the Venturi tube air supply valve, and the negative pressure port of the Venturi tube generates negative pressure. At the same time, the airflow passes through the sample air supply valve, the filter, the third function valve, and the first function valve to blow air to the negative pressure end of the Venturi tube. The airflow cleans the material on the filter when passing through the filter.

[0020] The invention can automatically take quantitative samples from a gravity conveying pipeline, a pressure conveying pipeline, and a silo and convey them to an analytical instrument. After the analytical instrument has completed the detection, the system automatically returns the samples to the conveying pipeline or the silo. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0022] Figure 2 A schematic diagram of backflushing before sampling of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0023] Figure 3A schematic diagram of sample collection of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0024] Figure 4 A schematic diagram of sample transfer of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0025] Figure 5 A schematic diagram of manual sampling of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0026] Figure 6 A schematic diagram of removing excess samples of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0027] Figure 7 A schematic diagram of filter cleaning of an automatic sampling and sample return system for automatic analysis proposed by the present invention;

[0028] Figure 8 The present invention is a schematic diagram of sample return of an automatic sampling and sample return system for automatic analysis.

[0029] Figure numerals: 1. sample return port; 2. venturi tube air supply valve; 3. venturi tube; 4. gas source; 5. sample delivery air supply valve; 6. first function valve; 7. purge air supply valve; 8. second function valve; 9. connecting pipeline; 10. sampling port; 11. sample valve; 12. sampling valve; 13. filter; 14. third function valve; 15. manual sampling valve; 16. manual sampling port; 17. sample delivery port; 18. analyzer. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-Figure 8 , an automatic sampling and sample return system for automatic analysis, comprising:

[0032] Return sample port 1;

[0033] A venturi tube 3, the venturi tube 3 is fixedly connected with the sample return port 1;

[0034] The sampling port 10 is provided with a filter 13, the filter 13 is connected to the venturi tube 3, the sampling port 10 and the return sample port 1 are connected to the same material pipeline, a filter screen is connected inside the filter 13, and the material of the filter 13 is selected according to the particle size of the sample, and can be a sintered filter plate, filter cloth, filter screen, screen, mesh, etc.;

[0035] Analyzer 18, analyzer 18 is connected with sample delivery port 17, analyzer 18 is lossless detection, preferably nuclear magnetic detector, spectrum detector, all are sent to material pipeline after detection, no inspection loss, sample delivery port 17 is connected with one end of venturi tube 3, sample return port 1 is connected with gas source 4, by setting of gas source 4, no additional power components are required, gas source 4 can be compressed air, compressed nitrogen, etc., gas source 4 is connected with venturi tube 3 and sampling port 10, sampling port 10 is connected with third function valve 14 and manual sampling valve 15, sampling port 10 is connected with sample valve 11 and sampling valve 12, sampling valve 12 is preferably a four-way ball valve, and ball valve 12 is preferably a four-way ball valve. It is a straight-through ball, and other valves are preferably ball valves. Other forms of valves such as butterfly valves and plug valves can also be used when the flow rate is met; the valve drive form can be pneumatic, electric, hydraulic drive, etc., the sampling port 10 is connected to the manual sampling port 16, the Venturi tube 3 is connected to the first function valve 6 and the second function valve 8, the Venturi tube 3 and the sampling port 10 are connected to the same connecting pipe 9, the air source 4 is connected to the Venturi tube air supply valve 2, the sample delivery air supply valve 5 and the purge air supply valve 7, the Venturi tube air supply valve 2, the sample delivery air supply valve 5 and the purge air supply valve 7 are preferably solenoid valves, and other forms of valves can also be used when the flow rate is met.

[0036] The implementation principle of this embodiment is: when in use, before sampling: the sampler needs to backflush the sampling pipeline to remove the old sample and ensure the latest quality of the sample, open the purge air supply valve 7, open the sample valve 11, close the other valves, and turn the sampling valve 12 to the vertical position. At this time, the air flow blows air to the sample valve 11 through the purge air supply valve 7, and the old sample is blown back into the material pipeline to achieve the cleaning purpose, effectively avoiding the problem of mixing old and new samples; sample collection: open the Venturi tube air supply valve 2, open the sample valve 11, open the first function valve 6, open the second function valve 8, close the other valves, and turn the sampling valve 12 to the horizontal position The airflow flows to the Venturi tube 3 through the Venturi tube air supply valve 2, and the negative pressure port of the Venturi tube 3 generates negative pressure, and air is sucked from the material pipeline through the first functional valve 6, the second functional valve 8, the filter 13, the sampling valve 12, and the sample valve 11. The material enters with the airflow and is intercepted by the filter 13. The material will gradually accumulate under the filter 13 until the cavity of the sampling valve 12 is filled; Sample transfer: open the sample delivery air supply valve 5, close the other valves, and turn the sampling valve 12 to the vertical position. The airflow flows to the sampling valve 12 through the sample delivery air supply valve 5, and blows the material in the cavity of the sampling valve 12 to the sample delivery port 17. The sample will Enter the analyzer 18 for internal testing; manual sampling: when the analyzer 18 fails and cannot be restored temporarily, temporary manual sampling is required to send to the laboratory for analysis. Open the sample supply valve 5, open the third function valve 14, open the manual sampling valve 15, and close the other valves. The position of the sampling valve 12 is not limited. The airflow flows through the sample supply valve 5 to the filter 13, the third function valve 14, and the manual sampling valve 15 to the manual sampling port 16. When the airflow passes through the filter 13, the sample under the filter 13 will be brought out. The sample flows out of the manual sampling port 16 with the airflow. The material is manually connected and sent to the laboratory for inspection; redundant Sample removal: After the sample is transferred, there are still samples in the pipeline. The residual samples will affect the next test and need to be removed. Open the Venturi tube air supply valve 2, open the purge air supply valve 7, open the first function valve 6, open the third function valve 14, close the other valves, and open the sampling valve 12 to the horizontal position. At this time, the air flow flows to the Venturi tube 3 through the Venturi tube air supply valve 2, and the negative pressure port of the Venturi tube 3 generates negative pressure. At the same time, the air flow passes through the purge air supply valve 7, the sampling valve 12, the third function valve 14, and the first function valve 6 to blow air to the negative pressure end of the Venturi tube 3. The excess sample is blown back into the material pipeline through the sample return port 1 with the air flow;Clean the filter: The filter will be stuck with materials every time it is used. It needs to be cleaned in time to avoid affecting the next sampling analysis. Open the Venturi tube air supply valve 2, open the sample air supply valve 5, open the first function valve 6, open the third function valve 14, close the other valves, and open the sampling valve 12 to the horizontal position. At this time, the air flow flows to the Venturi tube 3 through the Venturi tube air supply valve 2, and the negative pressure port of the Venturi tube 3 generates negative pressure. At the same time, the air flow passes through the sample air supply valve 5, the filter 13, and blows air to the negative pressure end of the Venturi tube 3 through the third function valve 14 and the first function valve 6. When the air flow passes through the filter 13, the material on the filter 13 is cleaned, and the blown material is blown back into the tube material pipeline through the sample return port 1 with the air flow; sample return: analyzer 18 minutes After the sample is analyzed, the obtained data is transmitted to the system. At this time, the sample in the analyzer 18 needs to be returned to the material pipeline to prepare for the next sample test. The venturi tube air supply valve 2, the first function valve 6, and the second function valve 8 are opened. The other valves are closed and the sampling valve 12 is turned to the vertical position. At this time, the airflow flows to the venturi tube 3 through the venturi tube air supply valve 2. The negative pressure port of the venturi tube 3 generates negative pressure. The negative pressure sucks up the material in the analyzer 18 through the first function valve 6, the second function valve 8, and the sampling valve 12. The sample is blown back to the material pipeline through the sample return port 1 with the airflow. Since the volume of the cavity of the sampling valve 12 is fixed, each sampling is a material equal to the volume of the material cavity. The purpose of quantitative sampling is achieved. ;

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic sampling and sample return system for automatic analysis, characterized in that: include: Return sample port(1); A venturi tube (3), the venturi tube (3) is fixedly connected to the sample return port (1); A sampling port (10), wherein a filter (13) is disposed on the sampling port (10), and the filter (13) is connected to the venturi tube (3); The analyzer (18) is connected with a sample delivery port (17), and the sample delivery port (17) is connected with one end of the venturi tube (3).

2. The automatic sampling and sample return system for automatic analysis according to claim 1, characterized in that: The sample return port (1) is connected to a gas source (4), and the gas source (4) is connected to the venturi tube (3) and the sampling port (10).

3. The automatic sampling and sample return system for automatic analysis according to claim 2, characterized in that: The gas source (4) is connected to a venturi tube gas supply valve (2), a sample delivery gas supply valve (5) and a purge gas supply valve (7).

4. The automatic sampling and sample return system for automatic analysis according to claim 3, characterized in that: The venturi tube (3) and the sampling port (10) are connected to a same connecting pipe (9).

5. The automatic sampling and sample return system for automatic analysis according to claim 4, characterized in that: The venturi tube (3) is connected to a first functional valve (6) and a second functional valve (8).

6. The automatic sampling and sample return system for automatic analysis according to claim 5, characterized in that: The sampling port (10) is connected to a sample valve (11) and a sampling valve (12), and the sampling port (10) is connected to an artificial sampling port (16).

7. The automatic sampling and sample return system for automatic analysis according to claim 6, characterized in that: The sampling port (10) is connected to a third functional valve (14) and a manual sampling valve (15).

8. The automatic sampling and sample return system for automatic analysis according to claim 7, characterized in that: The sampling port (10) and the sample return port (1) are connected to the same material pipeline, and a filter screen is connected inside the filter (13).

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