Preheating mechanism, conductivity detector and ion chromatograph

Abstract

The utility model provides a preheating mechanism, a conductivity detector and an ion chromatograph, and the preheating mechanism comprises a preheating support which is configured to be distributed along a first direction, and in the first direction, the preheating support is provided with a groove; and the preheating pipe is configured to be coiled in the groove, and the two sides of the preheating pipe are connected with the preheating supports correspondingly. The groove is formed in the preheating support in the first direction, the preheating pipe is wound on the preheating support through the groove, the length of the preheating pipe can be increased in a winding mode, the function of buffering pressure is achieved, more space can be saved, the total heating area is increased, and the preheating effect is more obvious.

Description

Technical Field

[0001] This application relates to the technical field of ion chromatographs, and more particularly, to a preheating mechanism, a conductivity detector, and an ion chromatograph. Background Art

[0002] Ion chromatography is a liquid chromatography method for analyzing anions and cations, and conductivity detection has become the most important detection method in ion chromatography due to its wide linear range, good selectivity, simple structure, and easy automatic operation.

[0003] In related technologies, an internal preheating structure is generally required in an ion chromatograph to maintain the stable operation of its components at a constant temperature. Therefore, there is an urgent need for a preheating structure to improve the preheating effect. Summary of the Utility Model

[0004] The purpose of this application is to provide a preheating mechanism, a conductivity detector, and an ion chromatograph, which can play a role in buffering pressure, save space, and have a more obvious preheating effect.

[0005] In a first aspect, an embodiment of this application provides a preheating mechanism, including: a preheating bracket configured to be distributed along a first direction, and in the first direction, the preheating bracket is configured with a groove; a preheating tube configured to be coiled around the groove, and both sides of the preheating tube are respectively connected to the preheating bracket.

[0006] In the above implementation process, the preheating bracket is provided with a groove along the first direction, and the preheating tube is coiled around the preheating bracket through the groove. By using a coiled method, the length of the preheating tube can be increased, which can play a role in buffering pressure, save more space, increase the total heating area, and make the preheating effect more obvious.

[0007] In some embodiments, the preheating bracket includes an arc section and a flat section, and the arc section is connected to the flat section to form a semi-cylindrical shape. This is beneficial to realizing the coiling of the preheating tube. At the same time, the semi-cylindrical preheating bracket can reduce the energy consumption of heating, increase the conduction efficiency, and be able to quickly heat up.

[0008] In some embodiments, a part of the structure of the flat section is recessed in the direction close to the arc section to form a plurality of the grooves. This can ensure that the preheating tube is coiled around the preheating bracket in sequence along the first direction, increase the length of the preheating pipeline, play a role in buffering pressure, and at the same time increase the total heating area, making the preheating effect more obvious.

[0009] In some embodiments, the center distance between two adjacent grooves is configured to be the same. This can ensure that the distance between the preheating tubes coiled around two adjacent grooves remains constant, and at the same time can make the preheating tubes all contact the conduction medium, increase the contact area, and improve the conduction efficiency.

[0010] In some embodiments, the distance between the centers of two adjacent grooves is twice the diameter of the groove. It can not only fix the preheating tube through the grooves, ensure that the distance between the preheating tubes coiled around two adjacent grooves remains constant, enable the conduction medium to directly contact the preheating tube, increase the contact area, and thus increase the conduction efficiency.

[0011] In some embodiments, the diameter of the groove is the same as the diameter of the preheating tube. It can make the groove just snap onto the preheating tube, play a role in fixing the preheating tube, and is convenient for installation and fixation.

[0012] In some embodiments, one end of the preheating bracket is provided with a first tube-passing hole, and the other end is provided with a second tube-passing hole. One end of the preheating tube passes through the first tube-passing hole, coils around the groove along the first direction, and then exits from the second tube-passing hole.

[0013] In the above implementation process, the preheating tube is coiled around the groove, and both ends of the preheating tube respectively exit from the first tube-passing hole and the second tube-passing hole. It can not only fix the preheating tube to prevent the preheating tube from spreading out from the preheating bracket, but also save space by coiling the preheating tube around the preheating bracket, increase the length of the preheating tube, play a role in buffering pressure, increase the heating area, and make the preheating effect more obvious.

[0014] In some embodiments, the preheating bracket is made of copper. By using copper with a higher thermal conductivity coefficient for the preheating bracket, the amount of material used for the preheating bracket itself is small, which can reduce the energy consumption for heating. Its high thermal conductivity coefficient increases the conduction efficiency and can quickly raise the temperature.

[0015] In a second aspect, the present application also provides a conductivity detector, including the preheating mechanism as described in any one of the above.

[0016] In a third aspect, the present application also provides an ion chromatograph, including the conductivity detector as described above.

[0017] Other features and advantages of the present application will be described in the subsequent specification, or some features and advantages can be inferred from the specification or determined without doubt, or can be known by implementing the above technologies of the present application.

[0018] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of the preheating mechanism provided for the embodiments of the present application;

[0021] Figure 2 Structural schematic diagram of the preheating bracket of the preheating mechanism provided for the embodiments of the present application.

[0022] Reference numerals: 100, preheating bracket; 101, groove; 102, flat section; 103, arc section; 104, first pipe-passing hole; 105, second pipe-passing hole; 200, preheating pipe. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. The components of the embodiments of the present application usually described and illustrated in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] In the present application, terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0025] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific situations.

[0026] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more. Embodiment

[0028] Ion chromatography is a type of high-performance liquid chromatography, so it is also called high-performance ion chromatography or modern ion chromatography. The main difference from traditional ion exchange chromatography columns is that the resin has a very high cross-linking degree and a low exchange capacity, the injection volume is very small, and the eluent is usually delivered by a piston pump and an on-line automatic continuous conductivity detection of the eluent is usually carried out. Separating and determining common anions is the specialty of ion chromatography. When a sample is injected, the determination results of 7 common ions can be obtained within about 20 minutes, which cannot be achieved by other analytical means. For the determination of cations, ion chromatography does not show superiority compared with AAS and ICP methods.

[0029] Ion chromatography is mainly used for the analysis of environmental samples, including anions and cations in surface water, drinking water, rainwater, domestic sewage and industrial wastewater, acid deposition, and atmospheric particulate matter, and the analysis of trace impurities in water and reagents related to the microelectronics industry.

[0030] The components of ion chromatography generally need to work stably at a constant temperature. Therefore, before normal analysis, the eluent of ion chromatography needs to be heated to a constant and stable temperature, that is, to ensure the normal working temperature range of the components. So generally ion chromatography needs to be preheated and can work normally only after the temperature is stable. Preheating is particularly important.

[0031] During the design process, the inventor found that in the prior art, the pipeline is generally wound around the column or directly placed in the groove, and the conduction medium is potting glue or air. The columnar structure itself will absorb heat and consume energy, resulting in slow heat conduction efficiency. There is no fixed notch, so the installation is inconvenient. The temperature of the inner wall of the heat conduction part where the pipeline fits and the outer wall of the non-fitting part is uneven, and the required space for placing in the groove is large.

[0032] In view of this, as Figure 1 - Figure 2As shown, in a first aspect, an embodiment of the present application provides a preheating mechanism, including: a preheating bracket 100, which is configured to be distributed in a first direction, and in the first direction, the preheating bracket 100 is configured with a groove 101; a preheating pipe 200, which is configured to be coiled around the groove 101, and both sides of the preheating pipe 200 are respectively connected to the preheating bracket 100.

[0033] Exemplarily, the first direction includes but is not limited to the left-right direction. The length distribution direction of the preheating bracket 100 is the first direction. The preheating pipe 200 can be snap-connected through the groove 101 on the preheating bracket 100 to ensure that the preheating pipe 200 is connected to the preheating bracket 100. The length of the preheating bracket 100 is not specifically limited and can be set according to actual situations, and no specific limitation is made here.

[0034] In the above implementation process, the preheating bracket 100 is provided with a groove 101 in the first direction, and the preheating pipe 200 is coiled around the preheating bracket 100 through the groove 101. By adopting a coiled manner, it can increase the length of the preheating pipe 200, play a role in buffering pressure, save more space, increase the total heating area, and make the preheating effect more obvious.

[0035] As Figure 2 shown, the preheating bracket 100 includes an arc section 103 and a flat section 102. The arc section 103 is connected to the flat section 102 to form a semi-cylindrical shape. Of course, in other embodiments, the preheating bracket 100 can also be set as a cylindrical shape. The groove 101 is coiled around the preheating bracket 100. When the preheating pipe 200 is coiled around the preheating bracket 100 through the groove 101, the groove 101 can completely accommodate the preheating pipe 200, that is, the diameter of the preheating pipe 200 is not greater than the cross-sectional size of the groove 101, so that the preheating pipe 200 does not protrude out of the groove 101. Of course, it can also be that the diameter of the preheating pipe 200 is greater than the cross-sectional size of the groove 101, so that a part of the structure of the preheating pipe 200 protrudes out of the groove 101. This is beneficial to realize the coiling of the preheating pipe 200. At the same time, the semi-cylindrical preheating bracket 100 can reduce the energy consumption of heating, increase the conduction efficiency, and can quickly heat up.

[0036] In some embodiments, a part of the structure of the flat section 102 is recessed in the direction close to the arc section 103 to form a plurality of the grooves 101. This can ensure that the preheating pipe 200 is coiled around the preheating bracket 100 in sequence along the first direction, increase the length of the preheating pipe 200, play a role in buffering pressure, and at the same time increase the total heating area, making the preheating effect more obvious.

[0037] In some embodiments, the center distance between two adjacent ones of the grooves 101 is configured to be the same. For example, the center distance between two adjacent ones of the grooves 101 is configured to be 4.4 mm. This can ensure that the spacing between the preheating tubes 200 wound around two adjacent grooves 101 remains constant. At the same time, it can enable the preheating tubes 200 to all come into contact with the conduction medium, increasing the contact area and improving the conduction efficiency.

[0038] In some embodiments, the center distance between two adjacent ones of the grooves 101 is twice the diameter of the groove 101. For example, the diameter of the groove 101 is configured to be 2.2 mm. It can not only fix the preheating tube 200 through the groove 101, ensure that the spacing between the preheating tubes 200 wound around two adjacent grooves 101 remains constant, but also enable the conduction medium to directly contact the preheating tube 200, increasing the contact area and thus increasing the conduction efficiency.

[0039] In some embodiments, the diameter of the groove 101 is the same as the diameter of the preheating tube 200. This can enable the groove 101 to just snap onto the preheating tube 200, playing a role in fixing the preheating tube 200, and the installation and fixation are convenient.

[0040] Please refer to Figure 1 again. One end of the preheating bracket 100 is configured with a first tube-passing hole 104, and the other end thereof is configured with a second tube-passing hole 105. One end of the preheating tube 200 penetrates into the first tube-passing hole 104, winds around the groove 101 along the first direction, and then is led out from the second tube-passing hole 105.

[0041] In the above implementation process, the preheating tube 200 winds around the groove 101, and both ends of the preheating tube 200 are respectively led out from the first tube-passing hole 104 and the second tube-passing hole 105. This can not only fix the preheating tube 200, prevent the preheating tube 200 from spreading out from the preheating bracket 100, but also save space by winding the preheating tube 200 around the preheating bracket 100, increase the length of the preheating tube 200, play a role in buffering pressure, increase the heating area, and make the preheating effect more obvious.

[0042] In some embodiments, the preheating bracket 100 is made of copper. By using copper with a higher thermal conductivity coefficient for the preheating bracket 100, the preheating bracket 100 uses less material itself, can reduce the energy consumption for heating, and its high thermal conductivity coefficient increases the conduction efficiency and can quickly heat up.

[0043] In a second aspect, the present application further provides a conductivity detector, including the preheating mechanism as described above.

[0044] The conductivity detector further includes a detection cell and a heat conduction block. After the detection cell is connected to the preheating mechanism to form an integral body, the integral structure is assembled on the heat conduction block, and then a conduction medium is potted in the inner cavity of the heat conduction block to remove the gaps inside the heat conduction block. The conduction medium can be air or a filler (such as potting glue, etc.). The filler has high fluidity and becomes a high-strength solid after potting. It can not only conduct energy to make the temperature conduction faster, but also fix the detection cell and the preheating mechanism.

[0045] In a third aspect, the present application further provides an ion chromatograph, including the conductivity detector as described above.

[0046] Among them, the working process of the ion chromatograph is as follows: The infusion pump transports the mobile phase to the analysis system at a stable flow rate (or pressure). Before the chromatographic column, the sample is introduced through an injector. The mobile phase brings the sample into the chromatographic column. Each component is separated in the chromatographic column and then flows to the conductivity detector in sequence with the mobile phase. For a suppressed ion chromatograph, an additional suppression system is added before the conductivity detector, that is, another high-pressure infusion pump transports the regeneration liquid to the suppressor. In the suppressor, the background conductivity of the mobile phase is reduced, and then the effluent is introduced into the conductivity detector. The detected signal is sent to the data system for recording, processing, or storage.

[0047] In all embodiments of the present application, "large" and "small" are relative, "many" and "few" are relative, and "up" and "down" are relative. For the expression methods of such relative terms, the embodiments of the present application will not elaborate further.

[0048] It should be understood that throughout the specification, the phrases "in this embodiment", "in the embodiments of the present application", or "as an optional implementation manner" mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the phrases "in this embodiment", "in the embodiments of the present application", or "as an optional implementation manner" that appear throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0049] In various embodiments of the present application, it should be understood that the magnitudes of the sequence numbers of the above processes do not necessarily mean the inevitable sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0050] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A preheating mechanism, characterized in that, Comprising: A preheating bracket, which is configured to be distributed along a first direction, and in the first direction, the preheating bracket is configured with grooves; A preheating tube, which is configured to be coiled in the grooves, and both sides of the preheating tube are respectively connected to the preheating bracket.

2. The preheating mechanism according to claim 1, characterized in that, The preheating bracket includes an arc section and a flat section, and the arc section is connected to the flat section to form a semi-cylindrical shape.

3. The preheating mechanism according to claim 2, wherein, Part of the structure of the flat section is recessed in a direction close to the arc section to form a plurality of the grooves.

4. The preheating mechanism according to claim 3, wherein, The center distance between two adjacent grooves is configured to be the same.

5. The preheating mechanism according to claim 3 or 4, characterized in that, The center distance between two adjacent grooves is twice the diameter of the grooves.

6. The preheating mechanism according to claim 5, characterized in that, The diameter of the grooves is the same as the diameter of the preheating tube.

7. The preheating mechanism according to claim 1, characterized in that, One end of the preheating bracket is configured with a first tube-passing hole, and the other end is configured with a second tube-passing hole. One end of the preheating tube penetrates into the first tube-passing hole, coils around the grooves along the first direction, and then is led out from the second tube-passing hole.

8. The preheating mechanism according to claim 1, characterized in that, The preheating bracket is made of copper.

9. A conductivity detector, characterized in that, Comprising the preheating mechanism according to any one of claims 1-8.

10. An ion chromatograph, characterized in that, Comprising the conductivity detector according to claim 9.

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