Ion chromatography conductivity detector

Abstract

The utility model provides an ion chromatography conductivity detector which comprises a base, an electrode assembly and a gland, and the base is provided with a limiting hole; the electrode assembly comprises an electrode plate and a pressing core, at least part of the electrode plate is located in the limiting hole and attached to the inner wall face of the limiting hole, one end of the pressing core extends into the limiting hole to press the electrode plate, the electrode plate is provided with an electrode runner hole, the pressing core is provided with a pressing runner hole, and the electrode runner hole is communicated with the pressing runner hole. The electrode runner hole is coaxially aligned with the pressing runner hole; and the pressing cover is arranged outside the pressing core in a sleeving manner, presses the other end of the pressing core, and is fixedly connected with the base. According to the ion chromatography conductivity detector disclosed by the embodiment of the utility model, the concentricity of the runner hole can be ensured, eddy current is avoided, and the detection accuracy of the ion chromatography conductivity detector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ion chromatography analysis, in particular to an ion chromatography conductivity detector. Background Art

[0002] Conductivity detectors are the most common detectors used in ion chromatography.

[0003] The conductivity detector detects and quantifies ions by detecting changes in conductivity in the solution. The conductivity measured by the conductivity detector depends on the type and concentration of ions in the solution flowing through its flow channel. The change in conductivity is converted into an electrical signal and amplified and sent to a data acquisition system for further processing and analysis. In the conductivity detector of related technology, the flow channel through which the test solution flows is generally defined by electrodes and other components. The concentricity of the flow channel cannot be guaranteed, which directly affects the accuracy of the data and may even form eddy currents and affect the test results. Summary of the invention

[0004] The utility model aims to provide an ion chromatography conductivity detector. The flow channel hole of the ion chromatography conductivity detector has high concentricity, can avoid the formation of eddy currents, and has accurate detection result data.

[0005] According to the ion chromatography conductivity detector of the embodiment of the utility model, it includes a base, the base is provided with a limiting hole; an electrode assembly, the electrode assembly includes an electrode sheet and a pressing core, the electrode sheet is at least partially located in the limiting hole and fits with the inner wall surface of the limiting hole, one end of the pressing core extends into the limiting hole to press the electrode sheet, the electrode sheet is provided with an electrode flow channel hole, the pressing core is provided with a pressing flow channel hole, the electrode flow channel hole is coaxially aligned with the pressing flow channel hole; a pressure cover, the pressure cover is sleeved outside the pressing core and presses the other end of the pressing core, and is fixedly connected to the base.

[0006] According to the ion chromatography conductivity detector of the embodiment of the utility model, the electrode sheet and the compression core can be limited by the limiting holes, thereby preventing the electrode sheet and the compression core from moving and misaligning, ensuring the concentricity of the flow channel hole, avoiding eddy currents, and improving the detection accuracy of the ion chromatography conductivity detector.

[0007] According to some embodiments of the present invention, the electrode sheet includes a body and a wire head, the body is located in the limiting hole and the wire head extends out of the limiting hole.

[0008] According to some embodiments of the utility model, there are multiple electrode sheets, and the base is provided with multiple wire holes connected to the limiting holes, the multiple wire holes are arranged at intervals, and the wire heads are located in the wire holes.

[0009] According to some embodiments of the utility model, the other end of the pressing core is provided with a limiting portion, and the pressing cover is provided with a limiting groove that cooperates with the limiting portion.

[0010] According to some embodiments of the present invention, the limiting portion is formed in a polygonal column shape.

[0011] According to some embodiments of the present invention, the electrode assembly further includes a gasket, which is located in the limiting hole and disposed between adjacent electrode sheets.

[0012] According to some embodiments of the present utility model, the gasket is a special engineering plastic part, and the thickness of the gasket is 0.4mm-0.6mm.

[0013] According to some embodiments of the present invention, the gland is sleeved on the base and is threadedly connected to the base.

[0014] According to some embodiments of the utility model, the base includes a limiting column and a base head, the limiting hole is formed in the limiting column, the base head is formed with a base flow channel hole, and the electrode flow channel hole, the base flow channel hole and the clamping flow channel hole are coaxially aligned.

[0015] According to some embodiments of the utility model, a pressing boss is provided at the other end of the pressing core, and the pressing boss is pressed between the limiting column and the pressure cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 An exploded view of an ion chromatography conductivity detector according to an embodiment of the utility model;

[0018] Figure 2 is a cross-sectional view of an ion chromatography conductivity detector according to an embodiment of the utility model;

[0019] Figure 3 It is a schematic structural diagram of an electrode sheet of an ion chromatography conductivity detector according to an embodiment of the utility model;

[0020] Figure 4 It is a structural schematic diagram of a gland of an ion chromatography conductivity detector according to an embodiment of the utility model;

[0021] Figure 5It is a structural schematic diagram of a compression core of an ion chromatography conductivity detector according to an embodiment of the utility model;

[0022] Figure 6 is a cross-sectional view of a compression core of an ion chromatography conductivity detector according to an embodiment of the utility model;

[0023] Figure 7 It is a structural schematic diagram of a base of an ion chromatography conductivity detector according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 100: ion chromatography conductivity detector;

[0026] 10: base, 11: limiting column, 12: limiting hole, 13: wire hole, 14: base head, 15: base flow channel hole;

[0027] 20: electrode sheet, 21: body, 22: lead head, 23: electrode flow channel hole, 24: first electrode sheet, 25: second electrode sheet, 26: gasket, 27: gasket flow channel hole;

[0028] 30: pressing core, 31: pressing flow channel hole, 32: pressing boss, 33: limiting part;

[0029] 40: pressure cover, 41: limiting groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0034] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0035] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0036] Combination Figure 1-Figure 7 As shown, according to an embodiment of the utility model, the ion chromatography conductivity detector 100 includes a base 10, an electrode assembly and a pressure cover 40. The base 10 is provided with a limiting hole 12. The electrode assembly includes an electrode sheet 20 and a pressing core 30. The electrode sheet 20 is at least partially located in the limiting hole 12 and is in contact with the inner wall surface of the limiting hole 12. One end of the pressing core 30 extends into the limiting hole 12 to press the electrode sheet 20. The electrode sheet 20 is provided with an electrode flow channel hole 23. The pressing core 30 is provided with a pressing flow channel hole 31. The electrode flow channel hole 23 is coaxially aligned with the pressing flow channel hole 31. The pressure cover 40 is sleeved on the outside of the pressing core 30 and presses the other end of the pressing core 30, and is fixedly connected to the base 10.

[0037] Therefore, according to the chromatographic conductivity detector 100 of the embodiment of the utility model, the electrode assembly is at least partially located in the limiting hole 12, and the electrode assembly can be limited by the limiting hole 12 to prevent it from being dislocated. Specifically, the electrode assembly may include an electrode sheet 20 and a compression core 30, and the electrode sheet 20 is at least partially located in the limiting hole 12. The shape of the inner wall surface of the limiting portion 33 can be at least partially adapted to the shape of the electrode sheet 20. When the electrode sheet 20 is placed in the limiting hole 12, the electrode sheet 20 can fit with the inner wall surface of the limiting hole 12 to prevent the electrode sheet 20 from being dislocated. In this way, the limiting hole 12 can not only limit the installation position of the electrode sheet 20, but also limit it to avoid movement and dislocation during the installation process, which may cause dislocation of the electrode flow channel hole 23.

[0038] One end of the pressing core 30 can extend into the limiting hole 12, wherein the electrode sheet 20 has an electrode flow channel hole 23, and the pressing core 30 has a pressing flow channel hole 31. When the pressing core 30 is installed in the limiting hole 12, the electrode flow channel hole 23 is coaxially aligned with the pressing flow channel hole 31. The limiting hole 12 can also limit the pressing core 30 to prevent it from moving, so as to maintain the concentricity of the electrode flow channel hole 23 and the pressing flow channel hole 31. During the installation process, the electrode sheet 20 and the pressing core 30 can be placed in the limiting hole 12 in turn, and the pressing core 30 can be pressed by the pressing cover 40. The pressing cover 40 can be sleeved on the pressing core 30 and fixedly connected to the base 10, thereby realizing the installation of the ion chromatography conductivity detector 100, so that the electrode sheet 20 and the pressing core 30 are installed between the base 10 and the pressing cover 40, ensuring the stability and reliability of its installation structure and the coaxiality of the electrode flow channel hole 23 and the pressing flow channel hole 31, preventing the formation of eddy currents, and improving the detection accuracy of the ion chromatography conductivity detector 100.

[0039] In some embodiments of the present invention, Figure 2-Figure 3 As shown, the electrode sheet 20 may include a body 21 and a lead 22, wherein the body 21 is located in the limiting hole 12 and the lead 22 extends out of the limiting hole 12, so that the body 21 can be limited by the limiting hole 12 to limit the electrode sheet 20 and prevent it from moving out of position, and the lead 22 can extend out of the limiting hole 12 to facilitate electrical connection with external components. Figure 3 In the example shown, the main body 21 of the electrode sheet 20 can be formed as a circular sheet structure, the electrode flow channel hole 23 is formed on the main body 21, and the shape of the limiting hole 12 is adapted to the shape of the main body 21, so that the electrode sheet 20 can be limited to prevent the electrode flow channel hole 23 from being misplaced during installation.

[0040] In some embodiments of the present invention, there may be multiple electrode sheets 20. It should be noted that multiple here refers to two or more. The specific number of electrode sheets 20 can be set as needed. Figure 1 In the example shown, the electrode sheet 20 can be two, namely a first electrode sheet 24 and a second electrode sheet 25, wherein the first electrode sheet 24 and the second electrode sheet 25 are at least partially located in the limiting hole 12, the two electrode flow channel holes 23 of the first electrode sheet 24 and the second electrode sheet 25 are coaxially aligned, and the clamping core 30 can clamp the two electrode sheets 20.

[0041] Combination Figure 1-2 and Figure 7As shown, the base 10 is provided with a plurality of wire holes 13 connected with the limiting hole 12, and the plurality of wire holes 13 are arranged at intervals, and the wire heads 22 are located in the wire holes 13. Specifically, the wire heads 22 can pass through the wire holes 13 to extend out of the limiting hole 12, wherein the wire heads 22 can be formed on the side walls of the limiting hole 12, and can penetrate the side walls of the limiting hole 12 away from the base head 14 along the axial direction of the limiting hole 12. When the electrode sheet 20 is located in the limiting hole 12, the wire heads 22 of the electrode sheet 20 are located in the wire holes 13, which not only facilitates the connection between the wire heads 22 and the outside, but also can limit the wire heads 22 through the wire holes 13, so as to further limit the electrode sheet 20.

[0042] There can be multiple wire holes 13, and multiple wire heads 22 of multiple electrode sheets 20 can be located in the multiple wire holes 13 respectively. The multiple wire holes 13 are staggered, so that the multiple wire heads 22 can be staggered to prevent the multiple electrode sheets 20 from short-circuiting.

[0043] In some embodiments of the utility model, Figure 7 As shown, the base 10 may include a limiting column 11 and a base head 14, the limiting hole 12 is formed in the limiting column 11, the base head 14 is formed with a base flow channel hole 15, the electrode flow channel hole 23, the base flow channel hole 15 and the clamping flow channel hole 31 are coaxially aligned, thereby ensuring the concentricity of the ion chromatography conductivity detector 100.

[0044] Specifically, the limiting column 11 is formed on the base head 14, and when the electrode sheet 20 and the pressing core 30 are installed in the limiting hole 12, the electrode flow channel hole 23, the base flow channel hole 15 and the pressing flow channel hole 31 correspond to each other and are coaxially aligned. Figure 1 and Figure 2 Combination Figure 7 In the example shown, the base flow channel hole 15 corresponds to the position of the limiting hole 12. In the axial cross section perpendicular to the limiting hole 12, the base flow channel hole 15 is located inside the limiting hole 12, thereby further ensuring the coaxiality of the electrode flow channel hole 23, the clamping flow channel hole 31 and the base flow channel hole 15.

[0045] In some embodiments of the utility model, Figure 2 , Figure 5-Figure 6 As shown, a clamping boss 32 is provided at the other end of the clamping core 30, and the clamping boss 32 is clamped between the limiting column 11 and the pressure cover 40. Specifically, the clamping boss 32 can be extended along the circumference of the clamping core 30. When one end of the clamping core 30 is installed in the limiting hole 12, the clamping boss 32 stops at the limiting column 11. The clamping boss 32 can be clamped between the limiting column 11 and the pressure cover 40 through the pressure cover 40 to achieve the clamping and fixing of the clamping core 30. A sealing buffer can be provided between the clamping boss 32 and the limiting column 11, which is not only conducive to the clamping and fixing of the clamping core 30, but also can play a sealing role.

[0046] In some embodiments of the utility model, Figure 4 and Figure 6 As shown, a limiting portion 33 is further provided at the other end of the pressing core 30, and a limiting groove 41 cooperating with the limiting portion 33 is provided on the pressing cover 40. Through the cooperation of the limiting portion 33 and the limiting groove 41, the pressing core 30 can be further limited to prevent the pressing core 30 from rotating, so as to facilitate installation and improve structural stability. Optionally, the limiting portion 33 can be formed into a polygonal column, and the structure of the limiting groove 41 is compatible with the limiting portion 33. The edges of the polygonal column can play a limiting role. In this way, when the limiting portion 33 is located in the limiting groove 41, the pressing core 30 can be prevented from rotating relative to the pressing cover 40 during the installation structure. For example, the limiting portion 33 can be formed into a triangular prism, a pentagonal prism, etc. Figure 5 In the example shown, the limiting portion 33 can be formed as a square head, which has a simple structure and can achieve a limiting rotation function. Of course, it can be understood that the limiting portion 33 can also be other shapes as long as it can cooperate with the limiting groove 41 to play a limiting role.

[0047] In some embodiments of the utility model, Figure 1-Figure 2 As shown, the electrode assembly also includes a gasket 26, which is located in the limiting hole 12 and is arranged between adjacent electrode sheets 20. The gasket 26 can be used to space adjacent gaskets 26, wherein the gasket 26 can be formed with a gasket flow channel hole 27, and the gasket flow channel hole 27 is coaxially aligned with the electrode flow channel hole 23. In some specific examples of the utility model, the electrode flow channel hole 23, the gasket flow channel hole 27, the portion of the compression flow channel hole 31 connected to the electrode flow channel hole 23, and the portion of the base flow channel hole 15 connected to the electrode flow channel hole 23 are coaxially arranged with the same diameter to further avoid the formation of eddy currents and affect the accuracy of the measurement data.

[0048] Optionally, the gasket 26 is a special engineering plastic part, for example, the gasket 26 can be made of a harder engineering plastic peek material. This material has high strength and small deformation, and after assembly, it can ensure that the distance between the gaskets 26 and the aperture of the flow channel hole will not change significantly. The thickness of the gasket 26 can be 0.4mm-0.6mm, for example, the thickness of the gasket 26 can be 0.4mm, 0.45mm, 0.5mm, 0.6mm. The thinner the thickness of the gasket 26, the smaller the distance between the electrode sheets 20, the smaller the volume of the conductivity detector 100, and the higher the sensitivity.

[0049] For the electrode sheet 20, the electrode sheet 20 can be made of stainless steel, for example, the electrode sheet 20 can be a 316 stainless steel piece with a thickness of 0.5 mm. The electrode flow channel hole 23 can adopt a special manufacturing process to ensure the cylindricity and smoothness of the flow channel, thereby improving the measurement accuracy. The electrode flow channel hole 23 can be passivated before use to ensure long-term stability.

[0050] In some embodiments of the utility model, the gland 40 is sleeved on the base 10 and is threadedly connected to the base 10. The gland 40 is screwed and fixed by the screws, which can not only ensure that the gasket 26 and the electrode sheet 20 are evenly stressed, but also further ensure that the flow channel hole will not be misaligned. Figure 1 and Figure 2 As shown, the limiting column 11 may be formed with an external thread, and the pressure cover 40 may be threadedly connected to the limiting column 11 .

[0051] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An ion chromatography conductivity detector, characterized in that: include: A base, wherein the base is provided with a limiting hole; An electrode assembly, the electrode assembly comprising an electrode sheet and a pressing core, the electrode sheet is at least partially located in the limiting hole and fits with the inner wall surface of the limiting hole, one end of the pressing core extends into the limiting hole to press the electrode sheet, the electrode sheet is provided with an electrode flow channel hole, the pressing core is provided with a pressing flow channel hole, and the electrode flow channel hole is coaxially aligned with the pressing flow channel hole; A pressure cover is sleeved outside the pressing core and presses the other end of the pressing core, and is fixedly connected to the base.

2. The ion chromatography conductivity detector according to claim 1, characterized in that: The electrode sheet comprises a body and a lead head, wherein the body is located in the limiting hole and the lead head extends out of the limiting hole.

3. The ion chromatography conductivity detector according to claim 2, characterized in that: There are a plurality of electrode sheets, and the base is provided with a plurality of wire holes connected with the limiting holes, the plurality of wire holes are arranged at intervals, and the wire heads are located in the wire holes.

4. The ion chromatography conductivity detector according to claim 1, characterized in that: The other end of the pressing core is provided with a limiting portion, and the pressing cover is provided with a limiting groove matched with the limiting portion.

5. The ion chromatography conductivity detector according to claim 4, characterized in that: The limiting portion is formed in a polygonal column shape.

6. The ion chromatography conductivity detector according to claim 1, characterized in that: The electrode assembly further includes a gasket, which is located in the limiting hole and arranged between adjacent electrode sheets.

7. The ion chromatography conductivity detector according to claim 6, characterized in that: The gasket is a special engineering plastic part, and the thickness of the gasket is 0.4mm-0.6mm.

8. The ion chromatography conductivity detector according to claim 1, characterized in that: The gland is sleeved on the base and is threadedly connected to the base.

9. The ion chromatography conductivity detector according to claim 1, characterized in that: The base includes a limiting column and a base head, the limiting hole is formed in the limiting column, the base head is formed with a base flow channel hole, and the electrode flow channel hole, the base flow channel hole and the pressing flow channel hole are coaxially aligned.

10. The ion chromatography conductivity detector according to claim 9, characterized in that: A pressing boss is provided at the other end of the pressing core, and the pressing boss is pressed between the limiting column and the pressure cover.

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