Mini flow cell and water quality detection device

Abstract

The utility model discloses a kind of micro flow cell, comprising: flow cell seat and the flow cell cover that covers in the upper of flow cell seat, several top hollow and each other intercommunication cabin are provided in flow cell seat inside, and the both sides of flow cell seat are respectively set respectively with the two cabin intercommunication of outermost side sample inlet and sample outlet;At least one of cabin is peripherally provided with several light source mounting hole and receiver mounting hole, to install light source and receiver;Flow cell cover is provided with several electrode mounting hole, electrode mounting hole corresponds with the cabin of not being set light source mounting hole and receiver mounting hole, to install different electrode.The utility model further discloses a kind of water quality detection device, including the micro flow cell and several electrodes, light source and light source receiver of above-mentioned.The utility model is combined by optical principle and electrochemistry principle, realizes the multi-parameter detection analysis of water quality.

Description

Technical Field

[0001] The present utility model relates to the technical field of water quality detection, and specifically relates to a micro flow cell and a water quality detection device. Background Art

[0002] The micro flow cell in water quality detection is a miniaturized device for water quality analysis and detection. It only requires a small amount of water sample to complete the detection. Its tiny size enables a large contact area between the water sample and the reagent, a short mass transfer distance, so that the reaction and detection can be completed quickly, the detection time is shortened, the working efficiency is improved, and it is suitable for batch detection. At the same time, due to the small size and light weight of the micro flow cell, it is easy to integrate with other instruments or sensors to build an automated water quality detection system, so as to realize rapid on-line detection and real-time monitoring.

[0003] At present, micro flow cells mainly analyze and detect water quality based on optical principles or electrochemical principles. Among them, the micro flow cell based on photochemical principles utilizes the interaction between light and substances in the water sample, allows light to propagate in the water sample, and measures changes in optical signals to determine water quality parameters. The micro flow cell based on electrochemical principles places a working electrode, a reference electrode, a counter electrode and the like in the micro flow cell. Ions in the water sample undergo redox reactions on the electrode surface, and water quality parameters are analyzed by measuring electrochemical signals such as current and potential. However, the water quality parameters obtained based on the two principles are different. If multi-parameter data is required, multiple detections are needed, which affects the detection efficiency. Contents of Utility Model

[0004] The purpose of the present utility model is to provide a micro flow cell and a water quality detection device, which combines optical principles and electrochemical principles to realize multi-parameter detection and analysis of water quality. To achieve the above purpose, the present utility model adopts the following technical solutions: The present utility model discloses a micro flow cell, comprising: a flow cell base and a flow cell cover covering the top of the flow cell base. A plurality of compartments are arranged inside the flow cell base, the top of each compartment is hollowed out and the compartments are communicated with each other. In addition, a sample inlet and a sample outlet are respectively arranged on two sides of the flow cell base, and the sample inlet and the sample outlet are respectively communicated with the two outermost compartments.

[0005] At least one of the compartments is provided with a plurality of light source mounting holes and receiver mounting holes in the circumferential direction, for mounting a light source and a receiver. The flow cell cover is provided with a plurality of electrode mounting holes, which correspond to the compartments not provided with the light source mounting holes and the receiver mounting holes, for mounting different electrodes.

[0006] Further, a compartment sample inlet and a compartment sample outlet are respectively arranged on two sides of the compartment. The height of the compartment sample inlet is a, the height of the compartment sample outlet is b, a < b, and the compartment sample inlet and the compartment sample outlet of adjacent compartments are communicated with each other.

[0007] Preferably, each of the compartments is provided with at least one reverse vent at the bottom, and the reverse vents of adjacent compartments are interconnected.

[0008] Furthermore, the flow cell cover has an electrode mounting base installed in the electrode mounting hole, and the electrode mounting base is connected to the electrode mounting hole by a thread.

[0009] Preferably, the flow cell seat is integrally formed and a first sealing ring is installed on the top of each compartment of the flow cell seat, and at least one second sealing ring is installed in the electrode mounting hole of the flow cell cover.

[0010] This utility model also discloses a water quality testing device, comprising: a micro-flow cell and several electrodes, a light source and a light source receiver, wherein the electrodes are installed in the electrode mounting holes, and the light source and the light source receiver are respectively installed in the light source mounting holes and the light source receiver mounting holes.

[0011] Furthermore, the micro-flow cell is provided with four compartments, which are sequentially arranged from the compartment connected to the sample inlet to the compartment connected to the sample outlet as the first compartment, the second compartment, the third compartment and the fourth compartment. The fourth compartment is provided with a number of light source mounting holes and light source receiver mounting holes around its circumference for mounting the light source and the light source receiver.

[0012] Furthermore, the light source is provided with a CODUV light source, a turbidity light source, and a chromaticity light source, and the light source receiver is provided with a first CODUV light source receiver, a second CODUV light source receiver, a first chromaticity light source receiver, a second chromaticity light source receiver, and a turbidity light source receiver, wherein the second CODUV light source receiver and the second chromaticity light source receiver serve as light source references for the CODUV light source and the chromaticity light source, respectively.

[0013] Preferably, the light source mounting holes are provided with three holes for mounting the three types of light sources respectively, and the light source receiver mounting holes are provided with five holes for mounting the five types of light source receivers respectively. The CODUV light source is positioned opposite the first CODUV light source receiver and perpendicular to the second CODUV light source receiver; the chromaticity light source is opposite the first chromaticity light source receiver and perpendicular to the second chromaticity light source receiver; and the turbidity light source is perpendicular to the turbidity light source receiver.

[0014] Furthermore, the electrode is provided with an EC electrode, a pH electrode, and an OPR electrode, which are respectively installed in electrode mounting holes on the top of the first chamber, the second chamber, and the third chamber.

[0015] After adopting the above technical solution, the present invention has the following effects: This invention is small in size and requires only a small amount of water sample to complete the detection. It combines optical and electrochemical principles, integrating electrodes, a light source, and a light source receiver in the flow cell, enabling the analysis and detection of multiple parameters of water quality in a short time with a single sample injection, thereby improving detection efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the micro-flow cell of this utility model.

[0017] Figure 2 This is an exploded view of the micro-flow cell of this utility model.

[0018] Figure 3 This is a top view of the miniature flow cell of this utility model.

[0019] Figure 4 for Figure 3 AA-direction cross-sectional view.

[0020] Figure 5 This is a cross-sectional view of the chamber in the miniature flow pool of this utility model.

[0021] Figure 6 for Figure 3 BB-direction cross-sectional view.

[0022] Figure 7 This is a three-dimensional structural diagram of the water quality testing device of this utility model.

[0023] Figure 8 This is an exploded view of the water quality testing device of this utility model.

[0024] Main component symbols: 1: Miniature flow cell; 101: Flow cell base; 1011: Chamber; 1011A: First chamber; 1011B: Second chamber; 1011C: Third chamber; 1011D: Fourth chamber; 10111: Chamber inlet; 10112: Chamber outlet; 10113: Reverse vent; 1012: Inlet; 1013: Outlet; 1014: Light source mounting hole; 1014A: CODUV light source mounting hole; 1014B: Turbidity light source mounting hole; 1014C: Chromaticity light source mounting hole; 1015 1015A: First CODUV light source receiver mounting hole; 1015B: Second CODUV light source receiver mounting hole; 1015C: Turbidity light source receiver mounting hole; 1015D: First chromaticity light source receiver mounting hole; 1015E: Second chromaticity light source receiver mounting hole; 102: Flow cell cover; 102A: First flow cell cover; 102B: Second flow cell cover; 1021: Electrode mounting hole; 1022: Second sealing ring; 103: Electrode mounting base; 104: First sealing ring. 2: EC electrode, 3: pH electrode, 4: OPR electrode, 5: CODUV light source, 6: turbidity light source, 7: chromaticity light source, 8: first CODUV light source receiver, 9: second CODUV light source receiver, 10: turbidity light source receiver, 11: first chromaticity light source receiver, 12: second chromaticity light source receiver. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 6 As shown, this utility model discloses a miniature flow cell, including: a flow cell base 101 and a flow cell cover 102 covering the flow cell base 101. The flow cell base 101 has a plurality of compartments 1011 inside. The top of the compartments 1011 is hollow and the compartments 1011 are interconnected. The flow cell base 101 has an inlet 1012 and an outlet 1013 on both sides, respectively. The inlet 1012 and the outlet 1013 are respectively connected to the two outermost compartments 1011.

[0027] At least one compartment 1011 has a plurality of light source mounting holes 1014 and receiver mounting holes 1015 arranged circumferentially for mounting light sources and receivers. The flow cell cover 102 has a plurality of electrode mounting holes 1021, which correspond to the compartments 1011 that do not have light source mounting holes 1014 and receiver mounting holes 1015, for mounting different electrodes.

[0028] In this embodiment, a chamber sample inlet 10111 and a chamber sample outlet 10112 are respectively disposed on two sides of the chamber 1011, the height of the chamber sample inlet 10111 is a, the height of the chamber sample outlet 10112 is b, a<b, and the chamber sample inlet 10111 and the chamber sample outlet 10112 of adjacent chambers 1011 are in communication with each other.

[0029] Next, at least one reverse evacuation port 10113 is disposed at the bottom of each chamber 1011, and the reverse evacuation ports 10113 of adjacent chambers 1011 are in communication with each other. The working principle of the reverse evacuation port 10113 is as follows: a water sample enters the micro flow cell through the sample inlet 1012, the vast majority of the water sample is sequentially injected into each chamber 1011 through the chamber sample inlet 10111 and the chamber sample outlet 10112 of each chamber 1011 for multi-parameter analysis and detection, and a small part of the water sample is injected into each chamber 1011 through the reverse evacuation port 10113 to improve the sample injection efficiency. The excess water sample is finally discharged out of the micro flow cell through the sample outlet 1013. Meanwhile, when evacuation is performed by reversing the external sample injection pump, the liquid in the micro flow cell can be directly discharged out of the micro flow cell through the reverse evacuation port 10113 at the bottom.

[0030] Meanwhile, in this embodiment, the flow cell base 101 is integrally formed. In some embodiments, due to different sizes of external electrodes, the size of each chamber 1011 is also different, and the height of the flow cell base 101 will be stepped. At this time, the flow cell cover 102 may be correspondingly provided as a plurality of pieces to respectively cover different chambers 1011.

[0031] In addition, the flow cell base 101 is provided with a first sealing ring 104 at the top of each chamber 1011, which serves to seal the chamber 1011 when the flow cell cover 102 is closed. Meanwhile, the flow cell cover 102 is provided with at least one second sealing ring 1022 in the electrode mounting hole 1021, which further serves to seal the chamber 1011 when an external electrode is connected. For an electrode that is not provided with threads on its outer shell, the flow cell cover 102 is further provided with an electrode mounting seat 103 in the electrode mounting hole 1021, the electrode mounting seat 103 is in threaded connection with the electrode mounting hole 1021, and at this time, the second sealing ring 1022 in the electrode mounting hole 1021 is disposed between the electrode mounting seat 103 and the electrode mounting hole 1021.

[0032] As Figures 7 to 8 shown, the present utility model further discloses a water quality detection apparatus, comprising: the above-mentioned micro flow cell 1, as well as a plurality of electrodes, a light source and a light source receiver, wherein the electrodes are installed in the electrode mounting holes 1021, and the light source and the light source receiver are respectively installed in the light source mounting hole 1014 and the light source receiver mounting hole 1015.

[0033] In this embodiment, the micro-flow cell 1 is provided with four chambers 1011. From the chamber 1011 connected to the sample inlet 1012 to the chamber 1011 connected to the sample outlet 1013, they are sequentially named the first chamber 1011A, the second chamber 1011B, the third chamber 1011C, and the fourth chamber 1011D. Furthermore, the fourth chamber 1011D is provided with a plurality of light source mounting holes 1014 and light source receiver mounting holes 1015 in the circumferential direction for mounting the light source and the light source receiver.

[0034] Simultaneously, the light source includes a CODUV light source 5 (an ultraviolet light source used for measuring chemical oxygen demand (COD) based on ultraviolet absorption), a turbidity light source 6, and a chromaticity light source 7. The light source receivers include a first CODUV light source receiver 8, a second CODUV light source receiver 9, a first chromaticity light source receiver 11, a second chromaticity light source receiver 12, and a turbidity light source receiver 10, wherein the second CODUV light source receiver 9 and the second chromaticity light source receiver 12 serve as light source references for CODUV light source 5 and chromaticity light source 7, respectively.

[0035] In this embodiment, three light source mounting holes 1014 are provided: CODUV light source mounting hole 1014A, turbidity light source mounting hole 1014B, and chromaticity light source mounting hole 1014C, corresponding to the installation of the three types of light sources. Five light source receiver mounting holes 1015 are provided: first CODUV light source receiver mounting hole 1015A, second CODUV light source receiver mounting hole 1015B, turbidity light source receiver mounting hole 1015C, first chromaticity light source receiver mounting hole 1015D, and second chromaticity light source receiver mounting hole 1015E, corresponding to the installation of the five types of light source receivers. Specifically, CODUV light source 5 is opposite to the first CODUV light source receiver 8 and perpendicular to the second CODUV light source receiver 9. Chromaticity light source 7 is opposite to the first chromaticity light source receiver 11 and perpendicular to the second chromaticity light source receiver 12. Turbidity light source 6 is perpendicular to turbidity light source receiver 10.

[0036] Furthermore, the light source mounting hole 1014 and the light source receiver mounting hole 1015 can each be provided with a reserved hole to install different light sources and light source receivers, so as to meet the requirements of different parameters of water quality detection and analysis. In this embodiment, a reserved hole for a light source receiver is added, and the position of the reserved hole is opposite to the turbidity light source mounting hole 1014B.

[0037] In addition, the electrode assembly includes an EC electrode 2 (conductivity electrode), a pH electrode 3 (acidity / alkalinity electrode), and an OPR electrode 4 (potential difference electrode). The EC electrode 2, pH electrode 3, and OPR electrode 4 are respectively installed in electrode mounting holes 1021 at the top of the first chamber 1011A, the second chamber 1011B, and the third chamber 1011C. In this embodiment, the outer shell of the EC electrode 2 is threaded and can be directly installed in the electrode mounting hole 1021. The outer shells of the pH electrode 3 and the OPR electrode 4 are not threaded, and electrode mounting bases 103 can be installed in electrode mounting holes 1024 before the pH electrode 3 and the OPR electrode 4 are installed in the electrode mounting bases 103.

[0038] Furthermore, the size of EC electrode 2 is different from that of pH electrode 3 and OPR electrode 4, and the size of the corresponding chamber 1011 is also different. Therefore, the flow cell seat 101 is stepped, and there are two flow cell covers 102, namely the first flow cell cover 102A and the second flow cell cover 102B, so as to cover the chambers 1011 at different heights respectively.

[0039] The above description is only a preferred embodiment of the present utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A miniature flow cell, characterized in that, comprising: a flow cell base and a flow cell cover covering above the flow cell base, wherein a plurality of chambers are arranged inside the flow cell base, the top of each chamber is hollowed out and the chambers are communicated with each other, and two sides of the flow cell base are respectively provided with a sample inlet and a sample outlet, which are respectively communicated with the two outermost chambers; at least one of the chambers is circumferentially provided with a plurality of light source mounting holes and receiver mounting holes for mounting a light source and a receiver; The flow cell cover is provided with a plurality of electrode mounting holes, which correspond to the chambers not provided with the light source mounting holes and the receiver mounting holes, for mounting different electrodes.

2. The micro-flow cell as described in claim 1, characterized in that: Two sides of each chamber are respectively provided with a chamber sample inlet and a chamber sample outlet, the height of the chamber sample inlet is a, the height of the chamber sample outlet is b, a<b, and the chamber sample inlet and the chamber sample outlet of adjacent chambers are communicated with each other.

3. A micro-flow cell as described in claim 2, characterized in that: The bottom of each of the chambers is provided with at least one reverse emptying port, and the reverse emptying ports of adjacent chambers are communicated with each other.

4. A micro-flow cell as described in claim 1, characterized in that: The flow cell cover is provided with an electrode mounting seat in the electrode mounting hole, and the electrode mounting seat is connected with the electrode mounting hole through threads.

5. A micro-flow cell as described in any one of claims 1-4, characterized in that: The flow cell base is integrally formed, the flow cell base is provided with a first sealing ring at the top of each chamber, and the flow cell cover is provided with at least one second sealing ring in the electrode mounting hole.

6. A water quality testing device, characterized in that, comprising: The micro flow cell as described in any one of claims 1 to 5, and a plurality of electrodes, light sources and light source receivers, wherein the electrodes are mounted in the electrode mounting holes, and the light sources and the light source receivers are respectively mounted in the light source mounting holes and the light source receiver mounting holes.

7. The water quality testing device as described in claim 6, characterized in that: Four chambers are arranged inside the micro flow cell, which are sequentially a first chamber, a second chamber, a third chamber and a fourth chamber from the chamber communicated with the sample inlet to the chamber communicated with the sample outlet. The fourth chamber is circumferentially provided with a plurality of light source mounting holes and light source receiver mounting holes for mounting the light sources and the light source receivers.

8. The water quality testing device as described in claim 7, characterized in that: The light sources are provided with a CODUV light source, a turbidity light source and a colorimetric light source. The light source receivers are provided with a first CODUV light source receiver, a second CODUV light source receiver, a first colorimetric light source receiver, a second colorimetric light source receiver and a turbidity light source receiver, wherein the second CODUV light source receiver and the second colorimetric light source receiver serve as light source references for the CODUV light source and the colorimetric light source respectively.

9. A water quality testing device as described in claim 8, characterized in that: Three light source mounting holes are provided, for respectively mounting the three types of light sources, and five light source receiver mounting holes are provided, for respectively mounting the five types of light source receivers; making the CODUV light source opposite to the first CODUV light source receiver and perpendicular to the second CODUV light source receiver; the colorimetric light source is opposite to the first colorimetric light source receiver and perpendicular to the second colorimetric light source receiver; the turbidity light source is perpendicular to the turbidity light source receiver.

10. A water quality testing device as described in claim 7, characterized in that: The electrodes are provided with an EC electrode, a pH electrode and an OPR electrode, which are respectively mounted in the electrode mounting holes at the tops of the first chamber, the second chamber and the third chamber.

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