Online dilution flow path system of high-concentration water sample online monitor

Abstract

The utility model discloses an online dilution flow path system of a high-concentration water sample online monitor. The system comprises a water sample dilution cup, a multi-way valve, a quantitative loop, an electromagnetic valve, a liquid level detector, a peristaltic pump and a digestion colorimetric pool, the system comprises three electromagnetic valves, and each electromagnetic valve comprises a common end C, a normally closed end NC and a normally open end NO; the lower outlet of the water sample diluting cup is connected with one branch port of the multi-way valve, and the quantitative adjusting pipe of the upper outlet of the water sample diluting cup is connected with the other branch port of the multi-way valve; a lower outlet of the digestion colorimetric pool is connected with a branch port of the multi-way valve; the multi-way valve, the quantitative ring, the electromagnetic valve, the liquid level detector and the peristaltic pump are sequentially connected through connecting pipes. According to the system, the dilution multiples of water samples with different concentrations can be realized by adjusting the height of the quantitative adjusting pipe of the water sample dilution cup, so that the water samples are detected by adopting the measuring range corresponding to the online monitor.

Description

Technical Field

[0001] The utility model relates to the field of chemical analysis instruments, in particular to an online dilution flow path system of an online monitor for high-concentration water samples. Background Art

[0002] When the existing online water quality analyzer detects and analyzes the water body of the pollution source, the range of the analyzer is set according to the on-site emission standards. However, for some special application sites, such as some parameters such as nitrite, the analyzer range is required to reach 0-2000mg / L, which cannot be met by the conventional range (0-2mg / L) of nitrite analyzers. The water sample needs to be accurately diluted step by step for analysis and detection. The dilution device and steps are relatively complicated and cumbersome. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides a high-concentration water sample online dilution flow path system that is easy to operate. The system includes a water sample dilution cup, a multi-way valve, a quantitative loop, a solenoid valve, a liquid level detector, a peristaltic pump, and a digestion colorimetric cell; the three solenoid valves of the system, each of which includes a common end C, a normally closed end NC, and a normally open end NO; the lower outlet of the water sample dilution cup is connected to a branch of the multi-way valve, and the quantitative adjustment tube of the upper outlet of the water sample dilution cup is connected to another branch of the multi-way valve; the lower outlet of the digestion colorimetric cell is connected to a branch of the multi-way valve; the multi-way valve, the quantitative loop, the solenoid valve, the liquid level detector, and the peristaltic pump are connected in sequence through connecting pipes.

[0004] Furthermore, the upper outlet of the water sample dilution cup is provided with a gas permeable overflow pipe and a quantitative adjustment pipe.

[0005] Furthermore, a slender bottleneck is provided in the middle and upper part of the water sample dilution cup, and the bottleneck is smoothly connected to the upper and lower cavity inner walls of the water sample dilution cup.

[0006] Furthermore, the multi-way valve, quantitative ring, solenoid valve, liquid level detector, and peristaltic pump are connected in sequence through connecting pipes, specifically, the NO end of the first solenoid valve is connected to the reagent waste liquid pipe, the NC end is connected to the cleaning waste liquid pipe, and the common end C is connected to the NC end of the second solenoid valve through a connecting pipe; the NO end of the second solenoid valve is connected to distilled water, and the common C end of the second solenoid valve is connected to one end of the peristaltic pump; the other end of the peristaltic pump is connected to one end of the liquid level detector; the other end of the liquid level detector is connected to the NC end of the third solenoid valve, the NO end of the third solenoid valve is connected to the air waste liquid pipe, and the common C end of the third solenoid valve is connected to the center hole of the multi-way valve through the quantitative ring.

[0007] The utility model adopts an online dilution flow path system of a high-concentration water sample online monitor, which can realize arbitrary dilution of high-concentration water samples with fewer components, and has the advantages of simple structure, simple flow path, and accurate measurement of high-concentration water samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the first application example of an online dilution flow path system of an online monitor for high-concentration water samples of the utility model;

[0009] Figure 2 Application Example 2 of an online dilution flow path system of an online monitor for high-concentration water samples of the utility model;

[0010] Figure 3 It is a structural diagram of the water sample dilution cup of the utility model.

[0011] In the figure: 1—first solenoid valve, 2—second solenoid valve, 3—peristaltic pump, 4—liquid level detector, 5—third solenoid valve, 6—quantitative loop, 7—digestion colorimetric cell, 8—multi-way valve, 9—water sample dilution cup, 10—neck, 1.1—cleaning waste liquid pipe, 1.2—reagent waste liquid pipe, 2.1—distilled water pipe, 5.1—air waste liquid pipe, 7.1, 7.2—high temperature and high pressure solenoid valve, 8.1—center hole of multi-way valve, 8.2, 8.3, 8.4, 8.5—branch port, 9.1—air permeable overflow pipe, 9.2—quantitative adjustment pipe, 9.3—connecting pipe DETAILED DESCRIPTION

[0012] The following is a further description of the online dilution flow path system of the high-concentration water sample online monitor of the utility model in combination with the accompanying drawings and specific embodiments.

[0013] like Figure 1 , 2 As shown, the utility model is an online dilution flow path system of a high-concentration water sample online monitor, comprising a water sample dilution cup (9), a multi-way valve (8), a quantitative ring (6), an electromagnetic valve (1, 2, 5), a liquid level detector (4), a peristaltic pump (3), a digestion colorimetric cell (7), and high-temperature and high-pressure electromagnetic valves (7.1, 7.2). When digestion is performed at room temperature, the following is adopted: Figure 1 The analytical flow path shown in the figure; when digestion under high temperature and high pressure is required, the following Figure 2 Analytical flow path shown.

[0014] When connected, the lower outlet of the water sample dilution cup (9) is connected to a branch port (8.2) of the multi-way valve (8) through a connecting pipe (9.3); the quantitative adjustment pipe (9.2) of the upper outlet of the water sample dilution cup (9) is connected to another branch port (8.3) of the multi-way valve (8); the air permeable overflow pipe (9.1) of the upper outlet of the water sample dilution cup (9) is higher than the liquid level of the water sample dilution cup (9); the lower outlet of the digestion colorimetric cell (7) is connected to a branch port (8.4) of the multi-way valve (8); the NO end of the first solenoid valve (1) is connected to the reagent waste liquid pipe (1.2), the NC end is connected to the cleaning waste liquid pipe (1.1), and the common end C is connected to the NC end of the second solenoid valve (2) through a connecting pipe; the second solenoid valve (2)

[0015] The NO end of the second solenoid valve (2) is connected to distilled water, the common C end of the second solenoid valve (2) is connected to one end of the peristaltic pump (3); the other end of the peristaltic pump (3) is connected to one end of the liquid level detector (4); the other end of the liquid level detector (4) is connected to the NC end of the third solenoid valve (5), the NO end of the third solenoid valve is connected to the air waste pipe, and the common C end of the third solenoid valve (5) is connected to the center hole (8.1) of the multi-way valve (8) through the quantitative ring (6).

[0016] Steps for diluting high concentration water samples:

[0017] First, the center hole (8.1) of the multi-way valve (8) is selectively connected to the branch hole (8.2), the third solenoid valve (5) is energized, the second solenoid valve (2) is not energized, and the peristaltic pump rotates counterclockwise to draw distilled water into the water sample dilution cup (9) and make its liquid level submerge the end of the quantitative adjustment tube (9.2); the third solenoid valve (5) is energized, the second solenoid valve (2) is energized, the first solenoid valve (1) is energized, and the peristaltic pump (3) continues to rotate counterclockwise to connect the second solenoid valve (5) and the second solenoid valve (2). (2) and the water sample dilution cup (9) are all distilled water in the pipeline transferred to the water sample dilution cup (9); the central hole (8.1) of the multi-way valve (8) is then selectively connected to the branch hole (8.3), the third solenoid valve (5), the second solenoid valve (2) and the first solenoid valve (1) are energized, and the peristaltic pump (3) rotates clockwise to discharge the distilled water in the water sample sampling cup (9) that is higher than the end of the quantitative adjustment tube (9), thereby achieving the desired amount of distilled water required for quantitatively diluting the high-concentration water sample.

[0018] Secondly, the central hole (8.1) of the multi-way valve (8) is selectively connected to the branch hole (8.5), and the branch hole (8.5) is connected to the high-concentration water sample through the connecting pipe. The third solenoid valve (5), the second solenoid valve (2), and the first solenoid valve (1) are energized, and the peristaltic pump (3) rotates clockwise to extract the high-concentration water sample from the branch hole (8.5) and fill the quantitative ring (6). After the liquid level detector (4) detects the liquid, the peristaltic pump (3) stops rotating; then the action of discharging excess water sample is executed, that is, the third solenoid valve (5) is not energized, the second solenoid valve (2) and the first solenoid valve (1) are energized, and the peristaltic pump (3) rotates counterclockwise to discharge the excess water sample except the quantitative ring (6) from the air waste liquid pipe (5.1), thereby realizing quantitative extraction of water samples.

[0019] Then, the quantitatively extracted water sample is pumped into the water sample dilution cup (9), that is, the central hole (8.1) of the multi-way valve (8) is selectively connected to the branch hole (8.2), the third solenoid valve (5) is energized, the second solenoid valve (2) and the first solenoid valve (1) are energized, the peristaltic pump rotates counterclockwise, and the high-concentration water sample in the quantitative ring (6) is transferred to the water sample sampling cup (9), and the peristaltic pump (3) continues to rotate to mix the liquid in the water sample sampling cup (9) by air bubbling.

[0020] Finally, the mixed sample is placed in the water sample cup (9) and used as the water sample for testing.

[0021] When the online monitoring analyzer monitors and analyzes high-concentration water samples, it first uses a high-concentration standard solution to obtain a diluted standard solution according to the above steps for diluting high-concentration water samples, and then mixes the diluted standard solutions and each detection reagent.

[0022] The water sample is put into the digestion colorimetric cell (7) for detection and analysis to obtain a standard curve. The diluted high-concentration water sample is then tested and the concentration value of the high-concentration water sample is calculated using the built-in standard curve.

Claims

1. An online dilution flow path system for an online monitor of a high-concentration water sample, characterized in that: It comprises a water sample dilution cup, a multi-way valve, a quantitative loop, a solenoid valve, a liquid level detector, a peristaltic pump and a digestion colorimetric cell; each of the three solenoid valves of the system comprises a common end C, a normally closed end NC and a normally open end NO; the lower outlet of the water sample dilution cup is connected to a branch of the multi-way valve, and the quantitative regulating tube of the upper outlet of the water sample dilution cup is connected to another branch of the multi-way valve; the lower outlet of the digestion colorimetric cell is connected to a branch of the multi-way valve; the multi-way valve, the quantitative loop, the solenoid valve, the liquid level detector and the peristaltic pump are connected in sequence through connecting pipes.

2. According to claim 1, an online dilution flow path system of an online monitor for high-concentration water samples is characterized by: The upper outlet of the water sample dilution cup is provided with a gas permeable overflow pipe and a quantitative adjustment pipe.

3. The online dilution flow path system of the high-concentration water sample online monitor according to claim 1 is characterized by: A slender bottleneck is arranged at the middle and upper part of the water sample dilution cup, and the bottleneck is smoothly connected to the inner walls of the upper and lower cavities of the water sample dilution cup.

4. The online dilution flow path system of the high-concentration water sample online monitor according to claim 1 is characterized by: The multi-way valve, quantitative ring, solenoid valve, liquid level detector, and peristaltic pump are connected in sequence through connecting pipes, specifically, the NO end of the first solenoid valve is connected to the reagent waste liquid pipe, the NC end is connected to the cleaning waste liquid pipe, and the common end C is connected to the NC end of the second solenoid valve through a connecting pipe; the NO end of the second solenoid valve is connected to distilled water, and the common C end of the second solenoid valve is connected to one end of the peristaltic pump; the other end of the peristaltic pump is connected to one end of the liquid level detector; the other end of the liquid level detector is connected to the NC end of the third solenoid valve, the NO end of the third solenoid valve is connected to the air waste liquid pipe, and the common C end of the third solenoid valve is connected to the center hole of the multi-way valve through the quantitative ring.

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