Capillary connection structure for liquid phase systems

Abstract

This utility model provides a capillary connection structure for a liquid phase system, belonging to the field of capillary connection technology. It includes a connector, and further includes: a limiting component, which is located at one end of the connector and includes a connector disposed inside the connector. A limiting groove is formed on the connector near the connector, and a limiting block is connected to the connector near the limiting groove, with the limiting block movably connected to the limiting groove; and a reinforcing component, which is located at one end of the connector and used to reinforce the connection between the connector and the connector. The reinforcing component includes a fixing plate connected to one end of the connector. By setting the limiting component, when the connector is installed to one end of the connector via a threaded connection, the cooperation of the limiting groove and the limiting block effectively limits the maximum depth to which the connector is inserted into the connector, preventing over-installation of the connector and thus preventing excessive compression of the retaining sleeve inside the connector, which helps improve the stability of the capillary body during use.

Description

Technical Field

[0001] This utility model relates to the field of capillary connection technology, and in particular to a capillary connection structure for liquid phase systems. Background Technology

[0002] In a liquid chromatography system, the capillary connection structure refers to the piping system consisting of small tubing and its matching connectors and seals used to connect the various components of the system, as well as the inlet and outlet of the chromatographic column.

[0003] Existing capillary connection structures for liquid chromatography systems can minimize the voids inside the connector through a conical sealing structure, preventing sample retention or diffusion at the connection point, ensuring that sample components enter the detector in their original state after separation by the chromatographic column, and reducing problems such as peak broadening and peak tailing.

[0004] However, in practical applications, existing capillary connection structures for liquid systems typically use the threads between the connector and the fitting to provide clamping force to the ferrule, causing the ferrule to deform and fix the capillary. However, during the installation of the connector, it is easy to over-install, resulting in excessive compression of the ferrule. This causes excessive pressure on the tube wall, leading to localized indentations and wrinkles in the tube wall, shrinkage of the inner diameter, or even blockage of the flow path, which is detrimental to improving the stability of the capillary during use.

[0005] Therefore, this application provides a capillary connection structure for liquid phase systems to meet the requirements. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a capillary connection structure for liquid phase systems.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a capillary connection structure for a liquid phase system, including a connector, and further comprising:

[0008] A limiting component is provided, which is located at one end of the connector. The limiting component includes a connector disposed inside the connector. A limiting groove is formed on one end of the connector near the connector. A limiting block is connected to one side of the connector near the limiting groove. The limiting block is movably connected to the limiting groove.

[0009] A reinforcing component is placed at one end of the connector and is used to reinforce the connection between the connector and the connector. The reinforcing component includes a fixing plate connected to one end of the connector. A snap-fit ​​bead is provided on the inner side of the fixing plate. A snap-fit ​​groove is provided on the side of the limiting groove near the snap-fit ​​bead. The limiting block is connected to the snap-fit ​​bead through the snap-fit ​​groove.

[0010] Furthermore, a retaining sleeve is provided inside the connector on the side near the connector.

[0011] The beneficial effects of adopting the above-mentioned further solution are: on the one hand, it fixes the outer wall of the capillary body to prevent it from being blown out by high pressure, and on the other hand, it forms a metal seal with the joint.

[0012] Furthermore, the sleeve and connector are internally provided with a capillary body, which is connected to the connector.

[0013] The beneficial effect of adopting the above-mentioned further solution is that after the ferrule fixes the capillary body, the capillary body is aligned with the groove on the connector, ensuring the continuity of the infusion passage.

[0014] Furthermore, an inner groove is provided on the side of the fixing plate near the snap-fit ​​bead, and the snap-fit ​​bead is movably connected to the inner groove.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the snap-fit ​​bead retracts inside the inner groove, preventing the snap-fit ​​bead from blocking the limit block from being inserted into the limit groove. At the same time, the diameter of both sides of the inner groove is smaller than the diameter of the fixing plate, preventing the fixing plate from separating from the inner groove.

[0016] Furthermore, a push plate is provided on the outer side of the fixed plate, and a slider is connected to the side of the fixed plate near the push plate. The push plate is slidably connected to the fixed plate through the slider.

[0017] The beneficial effect of adopting the above-mentioned further solution is that: pushing the push plate moves it to the outside of the snap-fit ​​bead, and the push plate pushes the snap-fit ​​bead to snap into the inside of the snap-fit ​​groove, ensuring the stability of the snap-fit ​​bead snapping into the snap-fit ​​groove.

[0018] Furthermore, the slider is provided with an anti-slip coating.

[0019] The beneficial effect of adopting the above-mentioned further solution is that it prevents the push plate from sliding on the fixed plate due to accidental vibration, which helps to further improve the stability of the connection between the connector and the joint.

[0020] Furthermore, a knob is connected to the end of the connector away from the joint.

[0021] The beneficial effects of adopting the above-mentioned further solution are: rotating the knob increases the friction between the knob and the hand, making it easier to drive the threaded connector to be installed inside the joint, which helps to improve installation efficiency.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] 1. By setting a limiting component, when the connector is installed to one end of the joint by means of a threaded connection, the cooperation between the limiting groove and the limiting block can effectively limit the maximum depth of the connector inside the joint, avoiding over-installation of the connector and thus preventing it from excessively squeezing the ferrule inside the joint. This solves the problem that if the connector is over-installed, the ferrule will easily exert excessive pressure on the tube wall, which may lead to local dents and wrinkles in the tube wall, or even reduce the inner diameter and block the flow path. This is beneficial to improving the stability of the capillary body during use.

[0024] 2. By setting up a reinforcement component, since a limiting groove is opened at one end of the connector, the number of turns of the inner thread groove of the connector is reduced accordingly, which leads to a decrease in the connection stability between the connector and the connector. To address this issue, a fixing plate is welded to one end of the connector. When the limiting block is inserted into the limiting groove, the locking bead inside the fixing plate will simultaneously lock into the locking groove, thereby enhancing the connection stability between the connector and the connector and preventing accidental detachment. Attached Figure Description

[0025] Figure 1 This is a front view of the capillary connection structure of the present invention for a liquid phase system;

[0026] Figure 2 This is a structural diagram of the limiting component in the capillary connection structure for liquid phase systems according to this utility model;

[0027] Figure 3 This is a side sectional view of the connector in the capillary connection structure for liquid phase systems according to this utility model.

[0028] Figure 4 This is a structural diagram of the connector in the capillary connection structure for liquid phase systems according to this utility model;

[0029] Figure 5 This is a structural diagram of the fixing plate in the capillary connection structure for liquid phase systems according to this utility model.

[0030] Figure Labels

[0031] 1. Connector;

[0032] 2. Limiting component; 21. Connector; 22. Limiting groove; 23. Limiting block; 24. Sleeve; 25. Capillary body; 26. Knob;

[0033] 3. Reinforcing components; 31. Fixing plate; 32. Snap-fit ​​beads; 33. Snap-fit ​​groove; 34. Push plate; 35. Inner groove; 36. Slider; 37. Anti-slip coating. Detailed Implementation

[0034] 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.

[0035] like Figures 1-5 As shown, this utility model provides a technical solution: a capillary connection structure for a liquid phase system, including a connector 1, and further comprising:

[0036] like Figures 1-4 As shown, the limiting component 2 is located at one end of the connector 1. The limiting component 2 includes a connector 21 disposed inside the connector 1. A limiting groove 22 is formed on one end of the connector 1 near the connector 21. A limiting block 23 is connected to one side of the connector 21 near the limiting groove 22. The limiting block 23 is movably connected to the limiting groove 22.

[0037] like Figures 1-5 As shown, the reinforcing component 3 is placed at one end of the connector 1 and is used to reinforce the connection between the connector 1 and the connector 21. The reinforcing component 3 includes a fixing plate 31 connected to one end of the connector 1. A snap-fit ​​bead 32 is provided on the inner side of the fixing plate 31. A snap-fit ​​groove 33 is provided on the side of the limiting groove 22 near the snap-fit ​​bead 32. The limiting block 23 is connected to the snap-fit ​​bead 32 through the snap-fit ​​groove 33. By threading the connector 21 onto one end of the connector 1, the limiting groove 22 and the limiting block 23 cooperate to limit the maximum depth of the connector 21 installed inside the connector 1, preventing the connector 21 from being over-installed and over-pressing the retaining sleeve 24 inside the connector 1, thus solving the problem of the connector 21 being unable to fully compress. Over-installation can lead to excessive pressure on the tube wall from the ferrule, causing localized indentations and wrinkles, reducing the inner diameter, or even blocking the flow path. This helps improve the stability of the capillary body 25 during use. Because a limiting groove 22 is provided at one end of the connector 1, the number of turns of the inner thread groove of the connector 1 is reduced, resulting in an unstable connection between the connector 21 and the connector 1. At this time, by welding the fixing plate 31 to one end of the connector 21, when the limiting block 23 is engaged inside the limiting groove 22, the locking bead 32 inside the fixing plate 31 is engaged inside the locking groove 33, thereby increasing the stability of the connection between the connector 21 and the connector 1 and preventing the connector 21 from accidentally falling off.

[0038] Furthermore, such as Figure 2As shown, a retainer 24 is provided inside the connector 1 on the side near the connector 21. By installing the retainer 24 inside the connector 1, when the connector 21 squeezes the retainer 24, the retainer 24 is squeezed and deformed. On the one hand, it fixes the outer wall of the capillary body 25 to prevent it from being pushed out by high pressure, and on the other hand, it forms a metal seal with the connector 1.

[0039] Furthermore, such as Figure 2 As shown, the capillary body 25 is provided inside the sleeve 24 and the connector 21. The capillary body 25 is connected to the connector 1. By inserting the capillary body 25 into the sleeve 24 and the connector 21, after the sleeve 24 fixes the capillary body 25, the capillary body 25 is aligned with the groove on the connector 1 to ensure the connection of the infusion passage.

[0040] Furthermore, such as Figure 5 As shown, an inner groove 35 is provided on the side of the fixing plate 31 near the snap-fit ​​bead 32. The snap-fit ​​bead 32 is movably connected to the inner groove 35. By forming a circular array of inner grooves 35 on the fixing plate 31, the snap-fit ​​bead 32 moves inside the inner groove 35. When the limiting block 23 contacts the snap-fit ​​bead 32, the snap-fit ​​bead 32 retracts inside the inner groove 35 to prevent the snap-fit ​​bead 32 from blocking the limiting block 23 from being inserted into the limiting groove 22. At the same time, the diameter of the two sides of the inner groove 35 is smaller than the diameter of the fixing plate 31 to prevent the fixing plate 31 from separating from the inner groove 35.

[0041] Furthermore, such as Figure 5 As shown, a push plate 34 is provided on the outer side of the fixed plate 31. A slider 36 is connected to the side of the fixed plate 31 near the push plate 34. The push plate 34 is slidably connected to the fixed plate 31 through the slider 36. By opening a groove on the push plate 34 that matches the slider 36, the slider 36 and the groove cooperate to limit the path of one end of the push plate 34. Pushing the push plate 34 causes it to move to the outer side of the snap-fit ​​bead 32. The push plate 34 pushes the snap-fit ​​bead 32 to snap into the inside of the snap-fit ​​groove 33, ensuring the stability of the snap-fit ​​bead 32 snapping into the snap-fit ​​groove 33.

[0042] Furthermore, such as Figure 5 As shown, the slider 36 is provided with an anti-slip coating 37. By spraying the anti-slip coating 37 onto the slider 36, the anti-slip coating 37 increases the friction between the slider 36 and the push plate 34, preventing the push plate 34 from sliding on the fixed plate 31 due to accidental vibration, which is beneficial to further improve the stability of the connection between the connector 21 and the joint 1.

[0043] Furthermore, such as Figure 4As shown, a knob 26 is connected to one end of the connector 21 away from the joint 1. By welding the knob 26 to one end of the connector 21, the capillary body 25 can be inserted into the inside of the knob 26. Rotating the knob 26 increases the friction between the knob 26 and the hand, which facilitates the threaded installation of the connector 21 into the inside of the joint 1, thereby improving the installation efficiency.

[0044] Working principle: such as Figures 1-5 As shown, first, the connector 21 and the ferrule 24 are fitted onto the capillary body 25. Then, the capillary body 25, the ferrule 24, and the connector 21 are pushed into the connector 1. The knob 26 is rotated, causing the connector 21 to rotate and be threaded into the connector 1. Afterward, the limiting block 23 engages with the limiting groove 22, limiting the maximum depth of the connector 21 inside the connector 1 to prevent over-installation and excessive compression of the ferrule 24 inside the connector 1. During the movement of the limiting block 23, the retaining bead 32 is pushed and retracted. Retracted inside the inner groove 35, when the limiting block 23 is engaged inside the limiting groove 22, the locking bead 32 is engaged inside the locking groove 33 by gravity, thereby increasing the stability of the connection between the connector 21 and the connector 1 and preventing the connector 21 and the connector 1 from accidentally falling off. Then, the push plate 34 is pushed to slide along the slider 36, and the push plate 34 pushes the locking bead 32 to engage inside the locking groove 33, ensuring the stability of the engagement between the locking bead 32 and the locking groove 33. The anti-slip coating 37 increases the friction between the slider 36 and the push plate 34, preventing the push plate 34 from accidentally vibrating and sliding on the fixed plate 31.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. Capillary connection structure for liquid phase systems comprising a joint (1), characterised in that, Also includes: A limiting component (2) is placed at one end of a connector (1). The limiting component (2) includes a connector (21) disposed inside the connector (1). A limiting groove (22) is provided on one end of the connector (1) near the connector (21). A limiting block (23) is connected to one side of the connector (21) near the limiting groove (22). The limiting block (23) is movably connected to the limiting groove (22). A reinforcing component (3) is placed at one end of the connector (1) and is used to reinforce the connection between the connector (1) and the connector (21). The reinforcing component (3) includes a fixing plate (31) connected to one end of the connector (1). A snap-fit ​​bead (32) is provided on the inner side of the fixing plate (31). A snap-fit ​​groove (33) is provided on the side of the limiting groove (22) near the snap-fit ​​bead (32). The limiting block (23) is connected to the snap-fit ​​bead (32) through the snap-fit ​​groove (33).

2. The capillary connection structure for a liquid phase system according to claim 1, wherein A retainer (24) is provided inside the connector (1) on the side near the connector (21).

3. The capillary connection structure for a liquid phase system according to claim 2, wherein The sleeve (24) and the connector (21) are provided with a capillary body (25), which is connected to the connector (1).

4. The capillary connection structure for a liquid phase system according to claim 1, wherein An inner groove (35) is provided on the side of the fixing plate (31) near the snap-fit ​​bead (32), and the snap-fit ​​bead (32) is movably connected to the inner groove (35).

5. The capillary connection structure for a liquid phase system according to claim 1, wherein A push plate (34) is provided on the outer side of the fixed plate (31), and a slider (36) is connected to the side of the fixed plate (31) near the push plate (34). The push plate (34) is slidably connected to the fixed plate (31) through the slider (36).

6. The capillary connection structure for a liquid phase system according to claim 5, wherein The slider (36) is provided with an anti-slip coating (37).

7. The capillary connection structure for a liquid phase system according to claim 1, wherein A knob (26) is connected to the end of the connector (21) away from the joint (1).

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