Conductivity detection device

Abstract

The utility model relates to a conductivity detection device, which comprises an internal component and an external component arranged on the outer side of the internal component, and the internal component comprises a flow cell used for accommodating liquid to be detected; the first conductivity electrode and the second conductivity electrode are the same in structure and respectively comprise a disc part and a mounting part, the first conductivity electrode and the second conductivity electrode are respectively fixed at two ends of the flow cell through respective mounting parts, and the mounting parts are positioned on the inner side of the flow cell; the temperature sensor is arranged in the mounting part of the second conductivity electrode, an outer side surface hole is formed in the disc part of the second conductivity electrode, and the temperature sensor is inserted into the mounting part from the outer side surface hole; and the shielding type cable is electrically connected with the first conductivity electrode, the second conductivity electrode and the temperature sensor. According to the utility model, the non-contact installation mode of the temperature sensor is optimized, so that the accuracy and stability of conductivity measurement are improved, and the cleaning efficiency and the anti-interference capability of equipment are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the conductivity detection technical field especially is to point to a conductivity detection device. BACKGROUND

[0002] In the conductivity detection field, the existing conductivity detector flow cell has many problems and needs to be improved. On the one hand, the internal cavity dead volume of the traditional conductivity detector flow cell is large, which makes it difficult to clean and replace the mobile phase, and the sample is easily left, thereby causing problems such as large baseline noise, unstable output signal, and poor repeatability, which seriously affects the accuracy and reliability of the detection result. On the other hand, the measurement result of conductivity is significantly affected by temperature, and if temperature correction and correction are not performed, a large measurement error will be generated. However, some existing temperature compensation schemes also have defects. For example, in the patent with publication number CN212228862U, the PT100 temperature probe is directly in contact with the liquid, which not only may cause liquid leakage and contamination, but also has a small sealing gap that is difficult to clean, further increasing the risk of liquid contamination. In addition, in the patent with publication number CN219675896U, the temperature sensor is placed on the titanium alloy electrode and located outside the electrode fixing column, which is far away from the liquid in the detection flow path channel and has a small contact area with the electrode, resulting in unstable temperature detection and unable to accurately reflect the actual temperature in the detection flow path, thereby affecting the temperature compensation effect of conductivity. The existence of these problems limits the development of conductivity detection technology in application scenarios with high precision, high stability, and high repeatability requirements. SUMMARY

[0003] Therefore, the utility model wants to overcome the technical problems in the prior art and provide a conductivity detection device that improves the accuracy and stability of conductivity measurement by optimizing the non-contact installation method of the temperature sensor, and enhances the cleaning efficiency and the anti-interference ability of the equipment.

[0004] To solve the above technical problems, the utility model provides a conductivity detection device, characterized by: comprising an internal component and an external component arranged outside the internal component, the internal component comprising:

[0005] A flow cell for containing a liquid to be measured;

[0006] A first conductivity electrode and a second conductivity electrode, both having the same structure and comprising a disc part and a mounting part, the first conductivity electrode and the second conductivity electrode being fixed at both ends of the flow cell through their respective mounting parts, and the mounting part being located inside the flow cell;

[0007] A temperature sensor is arranged in the mounting portion of the second conductivity electrode, and an outer side hole is arranged on the disc portion of the second conductivity electrode, and the temperature sensor is inserted into the mounting portion from the outer side hole;

[0008] A shielded cable is electrically connected with the first conductivity electrode, the second conductivity electrode and the temperature sensor, and is used for receiving signals of the first conductivity electrode, the second conductivity electrode and the temperature sensor.

[0009] In an embodiment of the utility model, the axial extension length of the mounting portion is greater than the axial extension length of the disc portion.

[0010] In an embodiment of the utility model, the inner side of the first conductivity electrode is provided with a first gourd soldering sheet, and the inner side of the second conductivity electrode is provided with a second gourd soldering sheet, and the shielded cable is electrically connected with the first conductivity electrode and the second conductivity electrode through the first gourd soldering sheet and the second gourd soldering sheet respectively.

[0011] In an embodiment of the utility model, the first gourd soldering sheet is fixed on the inner side of the first conductivity electrode through a first countersunk screw, and the second gourd soldering sheet is fixed on the inner side of the second conductivity electrode through a first countersunk screw.

[0012] In an embodiment of the utility model, the flow cell is provided with an internal thread, and the mounting portion of the first conductivity electrode and the second conductivity electrode is provided with an external thread matched with the internal thread.

[0013] In an embodiment of the utility model, the external assembly comprises a first protective shell, a second protective shell, a first chuck joint and a second chuck joint, the first protective shell is connected with the second protective shell, the first protective shell and the second protective shell are fixed with a slotted end face for fixing the shielded cable, the first chuck joint is arranged on the second protective shell, and the second chuck joint is arranged on the first protective shell.

[0014] In an embodiment of the utility model, the external assembly further comprises a quick plug connector located at the end of the shielded cable and used for connecting external equipment and a measuring system.

[0015] In an embodiment of the utility model, the first protective shell and the second protective shell are connected together by locking screws, the first chuck joint is fixed on the second protective shell by a second countersunk screw, and the second chuck joint is fixed on the first protective shell by a countersunk screw.

[0016] In one embodiment of the present invention, a sealing ring a is provided between the first conductivity electrode and the second protective shell, and a sealing ring d is provided between the second protective shell and the first chuck connector; a sealing ring b is provided between the second conductivity electrode and the first protective shell, and a sealing ring c is provided between the first protective shell and the second chuck connector.

[0017] In one embodiment of the present invention, the external component further includes a first hose connector and a second hose connector, wherein a first connector sealing ring is provided between the first chuck connector and the first hose connector and is clamped by a second fixing clamp; a second connector sealing ring is provided between the second chuck connector and the second hose connector and is clamped by a second fixing clamp.

[0018] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0019] The conductivity detection device of this utility model achieves non-contact temperature measurement by installing a temperature sensor inside the outer hole of the second conductivity electrode, so that it does not come into direct contact with the liquid in the detection flow path, effectively avoiding the risk of liquid leakage and contamination. Moreover, the installation position of the temperature sensor, which is located inside the flow cell, reduces the distance between it and the detection flow path, increases the contact area, and improves the sensitivity and accuracy of temperature measurement. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the conductivity detection device in a preferred embodiment of the present invention;

[0022] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the conductivity detection device.

[0023] Figure 3 for Figure 1 A schematic diagram of the internal components of the conductivity detection device shown.

[0024] Figure 4 for Figure 1 A schematic diagram of the external structure of the conductivity detection device shown.

[0025] Figure 5 for Figure 1 The diagram shows the structure of the second conductivity electrode.

[0026] Figure 6 for Figure 5A structure diagram of a second conductivity electrode and a temperature sensor is shown.

[0027] Description of the drawings: 1, internal components; 11, flow cell; 12, first conductivity electrode; 13, second conductivity electrode; 131, mounting portion; 132, outer side hole; 133, disc portion; 14, temperature sensor; 15, first countersunk screw; 16, first gourd solder piece; 17, second gourd solder piece; 18, sealing ring a; 19, sealing ring b; 20, sealing ring c; 21, sealing ring d; 3, external components; 31, first protective shell; 32, second protective shell; 33, first chuck joint; 34, second chuck joint; 35, second countersunk screw; 36, locking screw; 37, shielded cable; 38, quick plug joint; 200, first fixed clamp; 210, second fixed clamp; 220, first hose joint; 230, second hose joint; 240, first joint sealing ring; 250, second joint sealing ring. DETAILED DESCRIPTION

[0028] The utility model will be further explained in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0029] Reference Figures 1-6 The utility model discloses a conductivity detection device, including internal components 1 and setting the external components 3 of internal components outside, internal components 1 includes:

[0030] Flow cell 11 is used for containing the liquid to be measured.

[0031] First conductivity electrode 12 and second conductivity electrode 13, both same structure and including disc portion 133 and mounting portion 131 respectively, first conductivity electrode 12 and second conductivity electrode 13 are fixed in the both ends of flow cell 11 respectively through the mounting portion 131 of each other, and the mounting portion 131 is located at the inside of flow cell 11.

[0032] Temperature sensor 14, temperature sensor 14 is arranged in the mounting portion 131 on the second conductivity electrode 13 connected with flow cell 11, the disc portion 133 of the second conductivity electrode 13 is provided with outer side hole 132, temperature sensor 14 is inserted into the mounting portion 131 from the outer side hole 132;The temperature sensor 14 in the utility model is PT100 temperature sensor, temperature sensor 14 can be inserted into the mounting portion 131 from the outer side hole 132 on the second conductivity electrode 13, so that temperature sensor 14 does not contact the liquid in the detection flow path, temperature sensor 14 is inserted into the mounting portion 131 of the second conductivity electrode 13 connected with flow cell 11, thereby being located in the inside of flow cell 11, compared with the patent with publication number CN219675896U, the distance from the detection flow path is closer.

[0033] Shielded cable 37 is connected with the first conductivity electrode 12, the second conductivity electrode 13 and the temperature sensor 14;For receiving the signal of the first conductivity electrode 12, the second conductivity electrode 13 and the temperature sensor 14.

[0034] It should be noted that the axial extension length of the mounting portion 131 of the second conductivity electrode 13 installed therein is greater than the axial length of the disc portion 133 of the second conductivity electrode 13. This design can increase the contact area of the temperature sensor 14 and the second conductivity electrode 13, improve the accuracy and stability of temperature measurement, and this structure optimization can more accurately reflect the temperature change in the detection flow path, and provide more reliable temperature compensation basis for conductivity measurement.

[0035] Further, the inner side of the first conductivity electrode 12 is provided with a first gourd soldering piece 17;The inner side of the second conductivity electrode 13 is provided with a second gourd soldering piece 16, and the shielded cable 37 is respectively electrically connected with the first conductivity electrode 12 and the second conductivity electrode 13 through the first gourd soldering piece 17 and the second gourd soldering piece 16. By arranging gourd soldering piece on the inner side of the electrode, and welding the two ends of the lead to the gourd soldering piece and the shielded cable 37 respectively, the shielded cable 37 is connected with the electrode, the stable transmission of signal and the reliable connection of electrode are realized, this design reduces signal interference, improves the anti-interference ability of the measurement system, at the same time, simplifies the assembly process, enhances the reliability and maintainability of the equipment.

[0036] The first gourd welding piece 17 in this embodiment is fixed on the inner side of the first conductivity electrode 12 by the first countersunk screw 15, and the second gourd welding piece 16 is fixed on the inner side of the second conductivity electrode 13 by the first countersunk screw 15. The fixation of the first gourd welding piece 17 and the second gourd welding piece 16 by the first countersunk screw 15 ensures the firmness and stability of the connection, which can effectively prevent the gourd welding piece from loosening during the measurement process, thereby ensuring the stability of signal transmission and further improving the reliability and measurement accuracy of the equipment.

[0037] The flow cell 11 in this embodiment is provided with an internal thread, and the first conductivity electrode 12 and the second conductivity electrode 13 are provided with an external thread matched with the internal thread, in particular, the external thread is arranged on the mounting portion 131 of the second conductivity electrode 13. By adopting threaded connection between the flow cell 11 and the first conductivity electrode 12 and the second conductivity electrode 13, the quick installation and disassembly of the electrodes are realized, and the sealing and reliability of the connection are improved. This design not only simplifies the assembly process, but also reduces the risk of liquid leakage, enhances the stability and service life of the equipment.

[0038] The external component 3 includes a first protective shell 31, a second protective shell 32, a first chuck joint 33, and a second chuck joint 34. The first protective shell 31 is connected with the second protective shell 32, and the first protective shell 31 and the second protective shell 32 are fixed with a slotted end face for fixing the shielded cable 37 in the slot. The first chuck joint 33 is arranged on the second protective shell 32, and the second chuck joint 34 is arranged on the first protective shell 31. By arranging the first protective shell 31 and the second protective shell 32 and slotting the first protective shell 31 and the second protective shell 32 to fix the shielded cable 37, the compact design of the external component 3 and the stable fixation of the cable are realized. This design reduces the influence of external interference on the measurement signal, and improves the overall structural stability of the equipment.

[0039] In addition, the external component 3 also includes a quick connector 38 located at the end of the shielded cable 37 for connecting external equipment and the measurement system. The quick connector 38 realizes the quick connection and disconnection of the equipment with the external measurement system or equipment, which improves the flexibility and portability of the equipment, and facilitates quick switching and use in different application scenarios, further improving the practicality of the equipment.

[0040] During installation, the first protective shell 31 and the second protective shell 32 are connected together using locking screws 36; the first chuck joint 33 is fixed on the second protective shell 32 by a second countersunk screw 35; and the second chuck joint 34 is fixed on the first protective shell 31 by a second countersunk screw 35.

[0041] Preferably, a sealing ring a 18 is arranged between the first conductivity electrode 12 and the second protective shell 32, a sealing ring d 21 is arranged between the second protective shell 32 and the first chuck joint 33; a sealing ring b 19 is arranged between the second conductivity electrode 13 and the first protective shell 31, and a sealing ring c 20 is arranged between the first protective shell 31 and the second chuck joint 34, so as to achieve better sealing between the inner assembly 1 and the outer assembly 3.

[0042] The outer assembly 3 in the embodiment further comprises a first hose joint 220 and a second hose joint 230, a first joint sealing ring 240 is arranged between the first chuck joint 33 and the first hose joint 220, and the first hose joint 220 is clamped by a first fixing clamp 200. A second joint sealing ring 250 is arranged between the second chuck joint 34 and the second hose joint 230, and the second hose joint 230 is clamped by a second fixing clamp 210. The first hose joint 220 and the second hose joint 230 are connected with hoses for introducing and discharging liquid, and such a design not only reduces the risk of liquid leakage, but also improves the reliability of the equipment under high pressure or complex working conditions, and ensures the stable operation of the measurement system.

[0043] Obviously, the above embodiment is only an example for the purpose of clarity, and is not a limitation on the implementation. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the implementations. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An electrical conductivity detection device, characterized by: The internal component includes: A flow cell for containing a liquid to be measured; A first conductivity electrode and a second conductivity electrode, both of which have the same structure and include a disc part and a mounting part, the first conductivity electrode and the second conductivity electrode are fixed at both ends of the flow cell through the respective mounting parts, and the mounting parts are located inside the flow cell; A temperature sensor, which is arranged in the mounting part of the second conductivity electrode, and an outer side hole is provided on the disc part of the second conductivity electrode, and the temperature sensor is inserted into the mounting part from the outer side hole; A shielded cable line is electrically connected with the first conductivity electrode, the second conductivity electrode and the temperature sensor, and is used for receiving signals of the first conductivity electrode, the second conductivity electrode and the temperature sensor.

2. The conductivity detection device of claim 1, wherein: The axial extension length of the mounting part is greater than the axial extension length of the disc part.

3. The conductivity detection device of claim 1, wherein: The inner side of the first conductivity electrode is provided with a first gourd solder piece, and the inner side of the second conductivity electrode is provided with a second gourd solder piece, and the shielded cable line is electrically connected with the first conductivity electrode and the second conductivity electrode through the first gourd solder piece and the second gourd solder piece respectively.

4. The conductivity detection device of claim 3, wherein: The first gourd solder piece is fixed on the inner side of the first conductivity electrode through a first countersunk screw, and the second gourd solder piece is fixed on the inner side of the second conductivity electrode through a second countersunk screw.

5. The conductivity detection device of claim 1, wherein: The flow cell is provided with an internal thread, and the mounting parts of the first conductivity electrode and the second conductivity electrode are provided with external threads matched with the internal thread.

6. The conductivity detection device of claim 1, wherein: The external component includes a first protective shell, a second protective shell, a first chuck joint and a second chuck joint, the first protective shell is connected with the second protective shell, the first protective shell and the second protective shell are fixed with a slotted end face for fixing the shielded cable line, the first chuck joint is arranged on the second protective shell, and the second chuck joint is arranged on the first protective shell.

7. The conductivity detection device of claim 1, wherein: The external component further includes a quick plug connector located at the end of the shielded cable line, which is used for connecting external equipment and a measurement system.

8. The conductivity detection device of claim 6, wherein: The first protective shell and the second protective shell are connected together by locking screws, the first chuck joint is fixed on the second protective shell by a second countersunk screw, and the second chuck joint is fixed on the first protective shell by a second countersunk screw.

9. The conductivity detection device of claim 6, wherein: A sealing ring is arranged between the first conductivity electrode and the second protective shell, a sealing ring is arranged between the second protective shell and the first chuck joint, a sealing ring is arranged between the second conductivity electrode and the first protective shell, and a sealing ring is arranged between the first protective shell and the second chuck joint.

10. A conductivity detection device according to claim 9, characterised in that: The external component further includes a first hose joint and a second hose joint, a first joint sealing ring is arranged between the first chuck joint and the first hose joint, and is clamped by a second fixing clamp, and a second joint sealing ring is arranged between the second chuck joint and the second hose joint, and is clamped by a second fixing clamp.

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