Flexible flow cell filter with protective structure

Abstract

The utility model discloses a flexible flow cell filter with protection structure belongs to flow cell protection technical field and filter field of chromatograph, including protection mechanism and two capillary tubes, one end of one capillary tube inserts the upper port of protection mechanism, one end of another capillary tube inserts the lower port of protection mechanism, the connection between capillary tube and protection mechanism, through protection mechanism and two capillary tubes direct welding fixed, and in capillary tube end part inserts the line pipe joint, has reduced the step of multiple connection joints in traditional mode, not only has reduced the skill requirement to operating personnel, has saved installation time, has promoted installation efficiency and convenience, simultaneously, integrated welding fixed and simple plug -in structure have reduced the connecting part greatly, have effectively reduced dead volume, avoided the stagnation, diffusion in sample transmission, has guaranteed the accuracy of detection result, and the mode of welding fixed makes the whole structure more stable.

Description

Technical Field

[0001] This utility model relates to the field of flow cell protection technology for chromatographs and the field of filters, specifically a flexible flow cell filter with a protective structure. Background Technology

[0002] During the operation of a chromatograph, the flow cell, as a core component, plays a crucial role in the stability and reliability of the entire chromatographic analysis system. The connection parts in front of the flow cell have a key impact on ensuring the normal operation of the flow cell and improving detection accuracy.

[0003] Currently, the most common devices on the market for connecting the flow cell to a chromatograph are usually stainless steel tubing or connecting an online filter to the tubing, and then connecting this assembly to the chromatograph. These connection methods either fail to provide protection or have some obvious defects: on the one hand, their connection structure is relatively complex, requiring multiple connections, making the installation process cumbersome, not only consuming installation time but also requiring a high level of skill from the operator. On the other hand, due to the numerous connection points, a certain amount of dead volume will be generated in the intermediate connection holes, which may cause sample retention and diffusion during transmission, affecting the accuracy and repeatability of the detection results and reducing the detection precision and sensitivity of the chromatograph. Utility Model Content

[0004] The purpose of this invention is to provide a flexible flow cell filter with a protective structure. The protective mechanism is directly welded to two capillary tubes, and a conduit connector is inserted at the end of the capillary tubes. This simplifies the connection structure and reduces the multiple connection steps required in traditional methods. This not only lowers the skill requirements for operators but also saves installation time, improving installation efficiency and convenience. Furthermore, the integrated welding and simple plug-in structure significantly reduces the number of connection points, effectively reducing dead volume and preventing sample retention and diffusion during transport, ensuring the accuracy of detection results and improving the detection precision and sensitivity of the chromatograph. In addition, the welding method makes the overall structure more stable, enhancing structural stability and reducing the impact of loose connections on the flow cell, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flexible flow pool filter with a protective structure, comprising a protective mechanism and two capillary tubes, wherein one end of one capillary tube is inserted into the upper port of the protective mechanism, and one end of the other capillary tube is inserted into the lower port of the protective mechanism, and the capillary tubes are connected to the protective mechanism.

[0006] The end of the capillary tube furthest from the protection mechanism is connected to a conduit connector.

[0007] Preferably, the protective mechanism includes an upper shell and a lower shell, with one end of each of the two capillaries passing through the upper shell and the lower shell respectively and connecting between the upper shell and the lower shell;

[0008] The upper shell is located at the outer end of the lower shell, and the upper shell and the lower shell are connected to each other.

[0009] Preferably, the top of the lower shell has a groove, and a filter screen plate is installed in the groove, the filter screen plate being fitted to the bottom of the upper shell.

[0010] Preferably, the upper shell includes an outer shell and a rotary joint, and the rotary joint and the outer shell are connected to each other.

[0011] Preferably, the lower end of the inner wall of the outer shell is threaded to the lower shell, the rotary joint is located in the inner cavity of the outer shell and is movably connected, and one of the capillaries is welded inside the rotary joint.

[0012] Preferably, a limiting block is integrally formed on the top of the inner cavity of the outer shell, and a locking interface is opened on the surface of the rotary joint at the position corresponding to the limiting block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model provides a flexible flow cell filter with a protective structure. The protective mechanism is directly welded to two capillary tubes, and a conduit connector is inserted into the end of the capillary tubes. This simplifies the connection structure and reduces the number of connection steps required in traditional methods. This not only reduces the skill requirements for operators but also saves installation time and improves installation efficiency and convenience. At the same time, the integrated welding and simple plug-in structure significantly reduces the number of connection points, effectively reducing dead volume and avoiding sample retention and diffusion during transmission. This ensures the accuracy of detection results and improves the detection precision and sensitivity of the chromatograph. In addition, the welding method makes the overall structure more stable, enhances structural stability, and reduces the impact of loose connections on the flow cell.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial schematic diagram of the outer shell structure of this utility model;

[0018] Figure 3This is a partial cross-sectional view of the outer shell and lower shell structure of this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the protection mechanism and conduit connector structure of this utility model.

[0020] The following are the labels in the diagram: 1. Protective mechanism; 11. Upper shell; 111. Outer shell; 112. Rotary joint; 12. Lower shell; 2. Capillary tube; 3. Conduit connector; 4. Groove; 5. Filter screen plate; 6. Limiting block; 7. Snap-fit ​​interface. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides, for example Figures 1-4 The flexible flow cell filter with protective structure shown includes a protective mechanism 1 and two capillary tubes 2. One end of one capillary tube 2 is inserted into the upper port of the protective mechanism 1, and one end of the other capillary tube 2 is inserted into the lower port of the protective mechanism 1. The capillary tubes 2 are connected to the protective mechanism 1.

[0023] The end of the capillary tube 2 away from the protection mechanism 1 is connected to a conduit connector 3. The blade ring on the surface of the conduit connector 3 can be set as a separate or integrated connection.

[0024] The flexible flow tank filter with a protective structure consists of a protective mechanism 1 and two capillary tubes 2. One capillary tube 2 is inserted into the upper port of the protective mechanism 1, and the other is inserted into the lower port. The capillary tube 2 is connected to the protective mechanism 1. This connection can be fixed by welding or by other means, such as threaded connection, welding with a conduit connector, quick snap-fit, Luer connection, and riveting. As long as the capillary tube 2 can be connected to the protective mechanism 1, the selected connection method can be selected according to the actual needs of the staff. The end of the capillary tube 2 away from the protective mechanism 1 is connected to a conduit connector 3. The protective mechanism 1 forms a protective wrap around the capillary tube 2, and the conduit connector 3 connects the capillary tube 2 to the external pipeline.

[0025] Welding ensures a secure connection between the capillary tube 2 and the protective mechanism 1, preventing loosening or detachment due to vibration during use. It also eliminates the need for multiple connectors, simplifying the connection process and facilitating the installation of the flexible flow cell filter with protective structure. The plug-in conduit connector 3 facilitates quick connection and disassembly of the capillary tube 2 to external pipelines, improving the efficiency of device installation and maintenance. The protective mechanism 1 reduces the risk of damage to the capillary tube 2 due to external forces.

[0026] The protective mechanism 1 includes an upper shell 11 and a lower shell 12, with one end of each of the two capillaries 2 passing through the upper shell 11 and the lower shell 12 respectively and connecting the upper shell 11 and the lower shell 12.

[0027] The upper shell 11 is located at the outer end of the lower shell 12, and the upper shell 11 and the lower shell 12 are connected to each other.

[0028] The upper shell 11 and the lower shell 12 can be detachably assembled by means of threaded connection, while providing fixed support for the upper and lower ends of the capillary tube 2. At the same time, other methods can be used to connect the upper shell 11 and the lower shell 12, such as (through threaded connection, welding with conduit joint, quick snap-fit, Luer connection and riveting, etc., as long as the capillary tube 2 and the protection mechanism 1 can be connected, the selected connection method can be selected according to the actual needs of the staff).

[0029] The threaded connection makes the protection mechanism 1 easy to disassemble, facilitating the inspection and maintenance of the internal structure or capillary tube 2; the separate design of the upper shell 11 and the lower shell 12, combined with the welded and fixed capillary tube 2, not only ensures the stability of the overall structure, but also improves the maintenance flexibility of the device, avoiding the need for overall replacement due to local damage.

[0030] The upper shell 11 and the lower shell 12 can also be set to polygonal or other shapes, depending on the actual operation of the staff. In this utility model, they are set to be circular. At the same time, the size and length of the capillary 2 can also be set according to the actual use. The capillary 2 can be lengthened.

[0031] The top of the lower shell 12 is provided with a groove 4, and a filter screen plate 5 is installed in the groove 4. The filter screen plate 5 is integrally connected to the bottom of the upper shell 11 or snapped on, or it is placed flat in the groove 4 and fits against the upper shell 11 and the lower shell 12 respectively.

[0032] A filter screen plate 5 is installed in the groove 4 at the top of the lower shell 12. The filter screen plate 5 fits snugly against the bottom of the upper shell 11. Other connection methods can also be used, such as (the filter screen plate 5 can be integrally connected with the lower shell 12 or the upper shell 11, by quick snap-fit, by Luer connection, and by riveting, etc.). When the fluid passes through the protection mechanism 1, it needs to be filtered by the filter screen plate 5 before flowing. The position of the groove 4 is to provide a limiting function for the filter screen plate 5. At the same time, the position of the groove can also be used to place the filter screen plate flat or to install the filter screen plate 5 by clamping. The choice can be made according to actual needs.

[0033] The filter screen plate 5 can filter the fluid passing through, remove impurities, prevent impurities from entering the capillary tube 2 and causing blockage, and protect the flow pool, thus enhancing the protective function of the device for fluid transportation. The filter screen plate 5 is attached to the bottom of the upper shell 11 to ensure that the fluid must pass through the filter screen plate 5, ensuring the reliability of the filtration effect.

[0034] The upper shell 11 includes an outer shell 111 and a rotary joint 112. The rotary joint 112 and the outer shell 111 are connected to each other. The upper shell 11 is composed of the outer shell 111 and the rotary joint 112. The two are movably connected and can move or rotate relative to each other to form a double-layer nested structure. The movably connected outer shell 111 and rotary joint 112 enable the upper shell 11 to have an adjustment function, which can prevent the outer shell 111 from driving the rotary joint 112 to rotate synchronously during rotation, thereby preventing the capillary 2 from kinking or breaking and enhancing the protection of the internal capillary 2.

[0035] The lower end of the inner wall of the outer shell 111 is threaded to the lower shell 12. The rotary joint 112 is located in the inner cavity of the outer shell 111 and is movably connected. Other connection methods can also be used (such as the rotary joint 112 and the outer shell 111 being integrated into a single structure or welded to it through a conduit connector, through a quick snap-fit, through a Luer connection, or through riveting, etc., as long as the connection between the outer shell 111 and the rotary joint 112 can be achieved, the selected connection method can be selected according to the actual needs of the staff). One of the capillary tubes 2 is welded inside the rotary joint 112. The threaded connection between the outer shell 111 and the lower shell 12 ensures the overall stability of the protective mechanism 1. The capillary tube 2 is welded and fixed to the rotary joint 112 to ensure that the capillary tube 2 will not break during the adjustment of the outer shell 111, thus taking into account both the overall adjustment flexibility and structural stability of the protective mechanism 1.

[0036] The top of the inner cavity of the outer shell 111 is integrally formed with a limiting block 6. The surface of the rotary joint 112 is provided with a locking interface 7 at the position corresponding to the limiting block 6. Through the cooperation of the limiting block 6 and the locking interface 7, the rotary joint 112 can be prevented from falling out of the outer shell 111. When the outer shell 111 is rotated and adjusted between itself and the lower shell 12, the safety of the movable connection between the rotary joint 112 and the outer shell 111 is ensured. This allows the outer shell 111 to be rotated and adjusted, while avoiding the synchronous rotation of the rotary joint 112.

[0037] In practical use, one end of a capillary tube 2 is welded and fixed inside the rotary joint 112 of the upper shell 11 of the protection mechanism 1, and the other end is connected to the conduit joint 3 and connected to the external upstream pipeline through a plug-in method. One end of another capillary tube 2 is welded and fixed on the lower shell 12, and the other end is also plugged into the conduit joint 3 and connected to the external downstream pipeline. Then, the filter screen plate 5 in the groove 4 at the top of the lower shell 12 is installed in place. The outer shell 111 of the upper shell 11 is put on the outside of the rotary joint 112, so that the limiting block 6 at the top of the inner cavity of the outer shell 111 is embedded in the snap-fit ​​interface 7 on the surface of the rotary joint 112. Then, the upper shell 11 and the lower shell 12 are fixed through the threaded connection between the lower end of the inner wall of the outer shell 111 and the lower shell 12. At this time, the filter screen plate 5 is tightly attached to the bottom of the upper shell 11.

[0038] During the fluid transport process, the fluid enters the protection mechanism 1 from the upstream pipeline through the capillary tube 2. First, it passes through the filter screen plate 5 at the top of the lower shell 12 to filter impurities, preventing impurities from clogging the capillary tube 2 and protecting the flow pool. The filtered fluid is then transported to the downstream pipeline through another capillary tube 2.

[0039] When maintenance or replacement of parts is required, the outer shell 111 can be rotated. Since the outer shell 111 and the rotary joint 112 are movably connected, the rotation of the outer shell 111 will not drive the rotary joint 112 to rotate synchronously, thereby preventing the capillary tube 2 from twisting or breaking due to torsional force. The cooperation between the limit block 6 and the locking interface 7 ensures that the rotary joint 112 will not fall off from the outer shell 111 during the rotation process, ensuring adjustment safety. Thus, the upper shell 11 and the lower shell 12 can be quickly separated, allowing for cleaning or replacement of the filter screen plate 5, and also for checking the welding condition of the capillary tube 2. If different pipe sizes need to be adapted, the capillary tube 2 of the corresponding size and length can be replaced according to actual needs. The shape of the outer shell 111 and the lower shell 12 (such as polygonal, cylindrical, etc.) can also be adjusted as needed.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible flow cell filter with a protective structure, characterized in that: It includes a protective mechanism (1) and two capillary tubes (2), one end of which is inserted into the upper port of the protective mechanism (1) and the other end of which is inserted into the lower port of the protective mechanism (1). The capillary tubes (2) are connected to the protective mechanism (1). The end of the capillary tube (2) away from the protection mechanism (1) is connected to a wire pipe connector (3).

2. The flexible flow cell filter with protective structure according to claim 1, characterized in that: The protective mechanism (1) includes an upper shell (11) and a lower shell (12), with one end of each of the two capillaries (2) passing through the upper shell (11) and the lower shell (12) respectively and connecting to the upper shell (11) and the lower shell (12); The upper shell (11) is located at the outer end of the lower shell (12), and the upper shell (11) and the lower shell (12) are connected to each other.

3. The flexible flow cell filter with protective structure according to claim 2, characterized in that: The top of the lower shell (12) is provided with a groove (4), and a filter screen plate (5) is installed in the groove (4). The filter screen plate (5) is attached to the bottom of the upper shell (11).

4. The flexible flow cell filter with protective structure according to claim 3, characterized in that: The upper shell (11) includes an outer shell (111) and a rotary joint (112), which are connected to each other.

5. The flexible flow cell filter with protective structure according to claim 4, characterized in that: The lower end of the inner wall of the outer shell (111) is connected to the lower shell (12), and the rotary joint (112) is located in the inner cavity of the outer shell (111) and is movably connected. One of the capillaries (2) is welded to the inside of the rotary joint (112).

6. The flexible flow cell filter with protective structure according to claim 5, characterized in that: The top of the inner cavity of the outer shell (111) is integrally formed with a limiting block (6), and the surface of the rotary joint (112) is provided with a card interface (7) at the position corresponding to the limiting block (6).

7. The flexible flow cell filter with protective structure according to claim 1, characterized in that: The surface blade ring of the conduit connector 3 can be configured as a separate or integrated connection.

8. The flexible flow cell filter with protective structure according to claim 1, characterized in that: The connection between the capillary tube (2) and the protective mechanism (1) is by welding, threaded connection, quick snap-fit, Luer connection, or riveting.

9. The flexible flow cell filter with protective structure according to claim 2, characterized in that: The connection between the upper shell (11) and the lower shell (12) is a threaded connection, a quick snap connection, a Luer connection, or a riveting connection.

10. The flexible flow cell filter with protective structure according to claim 3, characterized in that: The filter screen plate (5) is integrally connected to the bottom of the upper shell (11) or snapped on, or it is placed flat in the groove (4) and fitted to the upper shell (11) and the lower shell (12) respectively.

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