Constant-temperature high-precision standard recovery device

Abstract

The utility model discloses a constant-temperature high-precision labeling recovery device which is characterized by comprising a labeling recovery module which comprises a liquid preparation tank, an emptying pipeline connected with the liquid preparation tank, a multi-channel valve connected with the emptying pipeline and a quantitative chamber connected with the multi-channel valve, a multi-channel valve A and a multi-channel valve B are arranged on the emptying pipeline, and a first quantitative loop, a second quantitative loop and a third quantitative loop are connected between the multi-channel valve A and the multi-channel valve B; through the arrangement of the device, the nitrogen generator and the vacuum pump are matched for use, and the emptying pipeline is designed, so that a sample and a standard sample can be accurately conveyed into the liquid preparation tank to be mixed, the sample and the standard sample are distributed by adopting a plurality of quantitative rings, rapid and accurate standard adding is realized, the standard adding accuracy is improved, and the precision of a detection result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection spike addition, in particular to a constant temperature high-precision spike addition and recovery device. Background Art

[0002] Spike addition and recovery means adding a certain amount of prepared liquid sample to the original measured sample, and then performing chromatographic detection on it according to the added prepared liquid sample; the existing water quality analysis and detection equipment usually uses a peristaltic pump or an injection pump to push the liquid. Since the peristaltic pump or injection pump will have problems with low dispensing accuracy when in use; at the same time, long-term use will also cause wear and aging of the peristaltic pump, resulting in low accuracy of the spike addition amount and affecting the accuracy of the detection result; therefore, it is necessary to propose a constant temperature high-precision spike addition and recovery device. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and propose a constant temperature high-precision spike addition and recovery device.

[0004] In order to achieve the above purpose, the utility model provides the following technical solution: It is characterized by including a spike addition and recovery module. The spike addition and recovery module includes a liquid preparation tank, an evacuation pipeline connected to the liquid preparation tank, a multi-channel valve connected to the evacuation pipeline, and a metering chamber connected to the multi-channel valve. A multi-channel valve A and a multi-channel valve B are provided on the evacuation pipeline, and a first metering loop, a second metering loop, and a third metering loop are connected between the multi-channel valve A and the multi-channel valve B.

[0005] Preferably, the capacities of the first metering loop, the second metering loop, and the third metering loop increase in sequence.

[0006] Preferably, a standard sample tank and an evacuation pipe are connected to the multi-channel valve, a first buffer tank is connected to the metering chamber, a second buffer tank is connected to the liquid preparation tank, and a vacuum pump and a nitrogen generator are connected to both the first buffer tank and the second buffer tank.

[0007] Preferably, it further includes a collection module connected to the spike addition and recovery module.

[0008] Preferably, the collection module includes a first sample tank, a channel valve connected to the first sample tank, a second sample tank connected to the channel valve, and chromatographic detection.

[0009] Preferably, a third buffer tank is connected to the second sample tank, and a filter is connected between the first sample tank and the channel valve.

[0010] Advantages of the present utility model: Through the setting of this device, by using a nitrogen generator and a vacuum pump in combination, and through the design of the evacuation pipeline, the sample and the standard sample can be accurately transported and mixed into the dispensing tank. Multiple quantitative loops are used for the distribution of both the sample and the standard sample, realizing rapid and accurate spiking, improving the spiking accuracy, and enhancing the accuracy of the detection results.

[0011] By placing the spiking recovery module in a refrigerated and constant temperature state, the problem that the volume of the quantitative loop changes due to temperature is solved, further improving the spiking accuracy. Brief Description of the Drawings

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is an enlarged view of part A of the present utility model.

[0014] Reference numerals in the figure: 1 sampling module, 11 first sample tank, 12 channel valve, 13 second sample tank, 14 chromatographic detection, 15 third buffer tank, 16 filter, 2 spiking recovery module, 21 dispensing tank, 22 evacuation pipeline, 221 multi-channel valve A, 222 multi-channel valve B, 223 first quantitative loop, 224 second quantitative loop, 225 third quantitative loop, 23 multi-channel valve, 24 quantitative chamber, 25 standard sample tank, 26 evacuation pipe, 27 first buffer tank, 28 second buffer tank. Detailed Embodiment

[0015] Next, we will further illustrate a constant-temperature high-precision spiking recovery device of the present utility model through embodiments in combination with the drawings.

[0016] Refer to Figures 1 to 2As shown in the figure, the utility model provides a constant-temperature high-precision spike recovery device, which is characterized by including a spike recovery module 2. The spike recovery module 2 includes a liquid preparation tank 21, an evacuation pipeline 22 connected to the liquid preparation tank 21, a multi-channel valve 23 connected to the evacuation pipeline 22, and a metering chamber 24 connected to the multi-channel valve 23. A multi-channel valve A 221 and a multi-channel valve B 222 are provided on the evacuation pipeline 22. A first metering loop 223, a second metering loop 224, and a third metering loop 225 are connected between the multi-channel valve A 221 and the multi-channel valve B 222. The capacities of the first metering loop 223, the second metering loop 224, and the third metering loop 225 increase in sequence. A standard sample tank 25 and an evacuation pipe 26 are connected to the multi-channel valve 23. A first buffer tank 27 is connected to the metering chamber 24. A second buffer tank 28 is connected to the liquid preparation tank 21. A vacuum pump and a nitrogen generator are connected to both the first buffer tank 27 and the second buffer tank 28; corresponding opening and closing valves are installed on the above-mentioned connecting pipelines; through the setting of this device, by using the nitrogen generator and the vacuum pump in cooperation, and through the design of the evacuation pipeline 22, the sample and the standard sample can be accurately transported and mixed in the liquid preparation tank 21. Multiple metering loops are used for the distribution of both the sample and the standard sample to achieve rapid and accurate spiking, improve the spiking accuracy, and enhance the accuracy of the detection result;

[0017] In one embodiment, as shown in the appendix Figure 1 figure, it further includes a collection module 1 connected to the spike recovery module 2. The collection module 1 includes a first sample tank 11, a channel valve 12 connected to the first sample tank 11, a second sample tank 13 connected to the channel valve 12, and a chromatographic detection 14. A third buffer tank 15 is connected to the second sample tank 13. A filter 16 is connected between the first sample tank 11 and the channel valve 12.

[0018] The usage process of the present utility model is as follows: In the first step, the liquid preparation tank 21 and the metering chamber 24 are rinsed and emptied. The channel valve 12 is adjusted to connect the first sample tank 11 with the second sample tank 13. The sample in the first sample tank 11 is transported to the second sample tank 13 through the filter 16 and the channel valve 12 by suction of the vacuum pump on the third buffer tank 15. The channel valve 12 is adjusted to be connected with the liquid preparation tank 21, and then the sample in the second sample tank 13 is transported to the liquid preparation tank 21 through the channel valve 12 by pushing with the nitrogen generator on the third buffer tank 15 and suction of the vacuum pump on the second buffer tank 28 in a way of one suction and one push to rinse the liquid preparation chamber 21. The multi-channel valve 23, the multi-channel valve A221 and the multi-channel valve B222 are adjusted to connect the liquid preparation tank 21 with the metering chamber 24. The sample in the liquid preparation chamber 21 is transported to the metering chamber 24 by pushing with the nitrogen generator on the second buffer tank 28 and suction of the vacuum pump on the first buffer tank 27. While emptying the liquid preparation tank 21, the metering chamber 24 is rinsed. The multi-channel valve 23 is adjusted to connect the metering chamber 24 with the emptying pipe 26, and the sample in the metering chamber 24 is discharged to the emptying pipe 26 through the multi-channel valve 23 by pushing with the nitrogen generator on the first buffer tank 27.

[0019] In the second step: After adding the standard sample and emptying, between the multi-channel valve A221 and the multi-channel valve B222 are adjusted to connect the first metering loop 223. The standard sample in the standard sample tank 25 is transported to the first metering loop 223 through the multi-channel valve 23 by suction of the vacuum pump on the second buffer tank 28. At this time, the volume of the standard sample in the first metering loop 223 is quantitative. Then the multi-channel valve A221 and the multi-channel valve B222 are adjusted to be directly connected, and the residual standard sample on the emptying pipeline 22 is all discharged to the emptying pipe 26 through the multi-channel valve 23 by pushing with the nitrogen generator on the second buffer tank 28. The standard samples in different standard sample tanks 25 can also be transported to the second metering loop 224 or the third metering loop 225 respectively by the same method. By providing multiple metering loops, namely the first metering loop 223, the second metering loop 224 and the third metering loop 225, between the multi-channel valve A221 and the multi-channel valve B222, corresponding metering loops can be used for different liquid preparation samples for distribution, improving the distribution accuracy of the samples.

[0020] In the third step: For pipeline rinsing, repeat the steps of the first step. First, inject the first sample tank 11 into the second sample tank 13, and then the sample in the second sample tank 13 is made to flow through the emptying pipeline through the channel valve 12 by the nitrogen generator on the second sample tank 13 and finally discharged to the emptying pipe 26 from the multi-channel valve 23.

[0021] Step 4: Filling the metering chamber with liquid. First, inject the first sample tank 11 into the second sample tank 13. Adjust the multi-channel valve 23 to connect it to the metering chamber 24. Adjust the channel valve 12 to connect it to the evacuation pipeline 22. Push the sample in the second sample tank 13 through the nitrogen generator on the third buffer tank 15 and transport it into the metering chamber 24.

[0022] Step 5: Sample spiking. Adjust the multi-channel valve A221 and the multi-channel valve B222 to connect them to the first metering loop 223. Under the suction of the vacuum pump on the second buffer tank 28 and the pushing of the nitrogen generator on the first buffer tank 27, transport all the sample and standard mixture in the metering chamber 24 and the first metering loop 223 into the dispensing tank 21 to complete sample spiking.

[0023] Step 6: Chromatographic analysis and detection. Adjust the valves on the pipeline to connect the dispensing tank 21 to the channel valve 12 and the second sample tank 13. Under the suction of the vacuum pump on the third buffer tank 15 and the pushing of the nitrogen generator on the second buffer tank 28, transport the sample and standard mixture in the dispensing tank 21 into the second sample tank 13. Adjust the channel valve 12 to connect the third sample tank 13 to the chromatographic detection 14 pipeline. Push the sample and standard mixture in the third sample tank 13 through the nitrogen generator on the third buffer tank 15 and transport it to the chromatographic detection 14 for analysis and detection.

[0024] The above embodiments are illustrative of the present invention and not restrictive thereof. Any simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A constant-temperature high-precision spike recovery device, characterized in that It includes a spike recovery module (2), and the spike recovery module (2) includes a liquid preparation tank (21), an evacuation pipeline (22) connected to the liquid preparation tank (21), a multi-channel valve (23) connected to the evacuation pipeline (22), and a metering chamber (24) connected to the multi-channel valve (23). A multi-channel valve A (221) and a multi-channel valve B (222) are provided on the evacuation pipeline (22), and a first metering loop (223), a second metering loop (224), and a third metering loop (225) are connected between the multi-channel valve A (221) and the multi-channel valve B (222).

2. The thermostatic high-precision spike recovery device according to claim 1, characterized in that: The capacities of the first metering loop (223), the second metering loop (224), and the third metering loop (225) increase sequentially from small to large.

3. A constant-temperature high-precision spiking recovery device according to claim 1, characterized in that: A standard sample tank (25) and an evacuation pipe (26) are connected to the multi-channel valve (23), a first buffer tank (27) is connected to the metering chamber (24), a second buffer tank (28) is connected to the liquid preparation tank (21), and a vacuum pump and a nitrogen generator are connected to both the first buffer tank (27) and the second buffer tank (28).

4. A constant-temperature high-precision spike recovery device according to claim 1, characterized in that: It further includes a collection module (1) connected to the spike recovery module (2).

5. A constant-temperature high-precision spiking recovery device according to claim 4, characterized in that: The collection module (1) includes a first sample tank (11), a channel valve (12) connected to the first sample tank (11), a second sample tank (13) connected to the channel valve (12), and a chromatographic detection (14).

6. The thermostatic high-precision spiking recovery device according to claim 5, wherein: A third buffer tank (15) is connected to the second sample tank (13), and a filter (16) is connected between the first sample tank (11) and the channel valve (12).

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