Low dead volume double seal capillary joint for liquid chromatography

Abstract

The utility model discloses a kind of low dead volume double sealing capillary joint for liquid chromatography, it is related to capillary joint technical field, including joint main body, the one end of joint main body is fixed with extension pipe, by the outer wall of sealing sleeve and the inner wall of joint main body matching installation, make and sealing pad fixed with sealing sleeve install inside joint main body, thus make outer pipe and the inner wall of joint main body perfect fit, in turn improve the sealing property between joint main body and outer pipe while reducing dead volume, by sealing ring is installed in the outer wall of joint main body, make sealing ring the outer wall of sealing sleeve and the inner wall of joint main body junction place protection installation, while reinforcing the fastening of sealing between outer pipe and joint main body, and with sealing ring fixed square board and one side of joint main body adhere, make square board one side fixed square outer wall and the inner wall of joint main body matching installation, it is convenient for device to capillary joint double sealing installation.

Description

Technical Field

[0001] This utility model relates to the field of capillary connector technology, specifically a low dead volume double-sealed capillary connector for liquid chromatography. Background Technology

[0002] The low dead volume double-sealed capillary connector for liquid chromatography is a capillary connector with low dead volume and double sealing effect used in liquid chromatography.

[0003] Based on the above, the inventors have discovered that: currently, there are many capillary connectors for liquid chromatography on the market, but when ordinary capillary connectors for liquid chromatography are connected to external pipelines, it is very easy to cause poor depth matching between the external pipeline and the connector, thus causing the pipeline to penetrate deep into the interior of the connector, resulting in an increase in dead volume, which seriously affects the normal use of the device. Therefore, in view of this, the inventors have studied and improved the existing structure to provide a low dead volume double-sealed capillary connector for liquid chromatography, in order to achieve a more practical purpose. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a low dead volume double-sealed capillary connector for liquid chromatography, comprising a connector body, an extension tube fixed to one end of the connector body, a sealing mechanism on the inner wall of the connector body, and a reinforcing mechanism on the outer wall of the sealing mechanism.

[0006] The sealing mechanism includes:

[0007] A sealing sleeve is provided, the outer wall of which matches the inner wall of the connector body. A sealing gasket is fixed on the inner wall of the sealing sleeve and is located inside the connector body.

[0008] As a preferred embodiment of this utility model, a connecting block is fixed to the outer wall of the sealing sleeve, the outer wall of the connecting block is matched with the inner wall of the connector body, the inner wall of the connecting block is provided with an insertion post, and the outer wall of the insertion post is sleeved with the top end of the connector body.

[0009] As a preferred embodiment of this utility model, the outer wall of the connecting block is slidably provided with a concave plate, the concave plate is disposed at the top of the connector body, and the inner wall of the concave plate is matched with the top of the insertion post.

[0010] As a preferred embodiment of this utility model, a limiting plate slides on the top of the concave plate, and the limiting plate is disposed at the top of the connector body.

[0011] As a preferred embodiment of this utility model, the reinforcement mechanism includes:

[0012] A sealing ring is disposed at one end of the sealing sleeve, and the sealing ring is disposed on the outer wall of the connector body.

[0013] As a preferred embodiment of this utility model, the outer wall of the sealing ring is fixed with two square plates, and a block is fixed on one side of each of the two square plates. The outer walls of the two blocks are matched with the inner walls of the connector body.

[0014] As a preferred embodiment of this utility model, the inner wall thread of the limiting plate has two studs, and the bottom ends of the two studs are connected to the inner wall thread of the connector body.

[0015] The beneficial effects of this utility model are:

[0016] 1. In this solution, the outer wall of the sealing sleeve is fitted to the inner wall of the connector body, allowing the sealing gasket, which is fixed to the sealing sleeve, to be installed inside the connector body. The connecting block, fixed to the outer wall of the sealing sleeve, engages with the inner wall of the connector body. The outer wall of the insert pin is fitted onto the top of the connector body until the bottom of the insert pin aligns with the inner wall of the connecting block, ensuring the connecting block is securely installed on the inner wall of the connector body. A concave plate slides along the outer wall of the connector body, protecting one side of the connecting block, and its inner wall engages with the top of the insert pin. To install, slide the limiting plate on the top of the concave plate until the bottom of the limiting plate abuts against the top of the connector body. Use the outer walls of the two studs to thread onto the inner wall of the limiting plate, so that the bottom of the studs is threaded onto the inner wall of the connector body. This effectively reinforces the sealing sleeve and ensures a stable installation on the inner wall of the connector body. It also facilitates the installation of the external pipe after it is fitted onto the inner wall of the sealing sleeve, allowing it to abut against one end of the sealing gasket. This ensures a perfect fit between the external pipe and the inner wall of the connector body, thereby improving the sealing performance between the connector body and the external pipe while reducing dead volume.

[0017] 2. In this solution, the sealing ring is installed on the outer wall of the connector body, so that the sealing ring protects the connection between the outer wall of the sealing sleeve and the inner wall of the connector body. At the same time, it strengthens the tightness of the seal between the external pipe and the connector body. The square plate fixed with the sealing ring is attached to one side of the connector body, so that the outer wall of the square block fixed on one side of the square plate matches the inner wall of the connector body. This facilitates the double sealing installation of the capillary connector. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a low dead volume double-sealed capillary connector for liquid chromatography according to this utility model;

[0020] Figure 2 This is a schematic diagram of the sealing mechanism of a low dead volume double-sealed capillary connector for liquid chromatography according to this utility model.

[0021] Figure 3 This is a schematic diagram of the separation structure of the sealing sleeve and the main body of a low dead volume double-sealed capillary connector for liquid chromatography according to this utility model.

[0022] Figure 4 This is a schematic diagram of the separation structure between the concave plate and the column insert of a low dead volume double-sealed capillary connector for liquid chromatography according to this utility model.

[0023] Figure 5 This is a schematic diagram of the reinforcement mechanism of a low dead volume double-sealed capillary connector for liquid chromatography according to this utility model.

[0024] In the diagram: 1. Connector body; 2. Extension tube; 3. Sealing mechanism; 31. Sealing sleeve; 32. Sealing gasket; 33. Connecting block; 34. Insert post; 35. Concave plate; 4. Reinforcing mechanism; 41. Sealing ring; 42. Square plate; 43. Square block; 5. Limiting plate; 6. Stud. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Example: Figures 1-5 As shown, this utility model provides a low dead volume double-sealed capillary connector for liquid chromatography, including a connector body 1, an extension tube 2 fixed to one end of the connector body 1, a sealing mechanism 3 provided on the inner wall of the connector body 1, and a reinforcing mechanism 4 provided on the outer wall of the sealing mechanism 3.

[0027] Sealing mechanism 3 includes:

[0028] A sealing sleeve 31 is provided, the outer wall of which matches the inner wall of the connector body 1. A sealing gasket 32 ​​is fixed on the inner wall of the sealing sleeve 31 and is located inside the connector body 1. A connecting block 33 is fixed on the outer wall of the sealing sleeve 31 and matches the inner wall of the connector body 1. An insertion post 34 is provided on the inner wall of the connecting block 33 and is fitted onto the top end of the connector body 1. A concave plate 35 is slidably provided on the outer wall of the connecting block 33 and is located at the top end of the connector body 1. The inner wall of the concave plate 35 matches the top end of the insertion post 34.

[0029] As attached Figure 1As shown, the top of the concave plate 35 slides on a limiting plate 5. The limiting plate 5 is located at the top of the connector body 1. The inner wall of the limiting plate 5 has two studs 6. The bottom ends of the two studs 6 are connected to the inner wall of the connector body 1, which facilitates the normal use of the device.

[0030] As attached Figure 1 and Figure 5 As shown, the reinforcement mechanism 4 includes:

[0031] A sealing ring 41 is provided at one end of the sealing sleeve 31 and on the outer wall of the connector body 1. Two square plates 42 are fixed to the outer wall of the sealing ring 41. A block 43 is fixed to one side of each of the two square plates 42. The outer walls of the two blocks 43 are matched with the inner wall of the connector body 1, which facilitates the double sealing installation of the capillary connector.

[0032] Working principle: In use, the outer wall of the sealing sleeve 31 is matched and installed with the inner wall of the connector body 1, so that the sealing gasket 32, which is fixed to the sealing sleeve 31, is installed inside the connector body 1, and the connecting block 33, which is fixed to the outer wall of the sealing sleeve 31, is engaged with the inner wall of the connector body 1. The outer wall of the insert post 34 is fitted onto the top of the connector body 1 until the bottom end of the insert post 34 is matched and installed with the inner wall of the connecting block 33, so that the connecting block 33 is securely installed on the inner wall of the connector body 1. The concave plate 35 slides along the outer wall of the connector body 1, so that the concave plate 35 protects one side of the connecting block 33, and the inner wall of the concave plate 35 is engaged with the top end of the insert post 34. The limiting plate 5 slides on the top end of the concave plate 35 until the bottom end of the limiting plate 5 abuts against the top end of the connector body 1. The outer walls of the two studs 6 are threaded with the inner wall of the limiting plate 5 respectively, so that the threads are engaged. The bottom end of column 6 is threaded onto the inner wall of the connector body 1, thereby effectively reinforcing the sealing sleeve 31 and ensuring its stable installation on the inner wall of the connector body 1. This also facilitates the installation of the external pipe and the inner wall of the sealing sleeve 31, allowing them to abut against one end of the sealing gasket 32. This ensures a perfect fit between the external pipe and the inner wall of the connector body 1, improving the sealing performance between the connector body 1 and the external pipe while reducing dead volume. The sealing ring 41 is installed on the outer wall of the connector body 1, protecting the connection between the outer wall of the sealing sleeve 31 and the inner wall of the connector body 1. This also strengthens the tightness of the seal between the external pipe and the connector body 1. Furthermore, the square plate 42, fixed to the sealing ring 41, fits against one side of the connector body 1, allowing the outer wall of the square block 43 fixed to one side of the square plate 42 to match the inner wall of the connector body 1, facilitating the double sealing installation of the capillary connector.

[0033] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low dead volume double-sealed capillary connector for liquid chromatography, comprising a connector body (1), wherein an extension tube (2) is fixed to one end of the connector body (1), characterized in that, The inner wall of the connector body (1) is provided with a sealing mechanism (3), and the outer wall of the sealing mechanism (3) is provided with a reinforcing mechanism (4). The sealing mechanism (3) includes: A sealing sleeve (31) is provided with its outer wall matching the inner wall of the connector body (1). A sealing gasket (32) is fixed on the inner wall of the sealing sleeve (31). The sealing gasket (32) is located inside the connector body (1).

2. The low dead volume double-sealed capillary connector for liquid chromatography according to claim 1, characterized in that, The outer wall of the sealing sleeve (31) is fixed with a connecting block (33), the outer wall of the connecting block (33) is matched with the inner wall of the connector body (1), the inner wall of the connecting block (33) is provided with a plug (34), and the outer wall of the plug (34) is sleeved with the top end of the connector body (1).

3. The low dead volume double-sealed capillary connector for liquid chromatography according to claim 2, characterized in that, The outer wall of the connecting block (33) has a sliding concave plate (35), which is located at the top of the connector body (1). The inner wall of the concave plate (35) is matched with the top of the insertion post (34).

4. The low dead volume double-sealed capillary connector for liquid chromatography according to claim 3, characterized in that, A limiting plate (5) slides on the top of the concave plate (35), and the limiting plate (5) is located on the top of the connector body (1).

5. A low dead volume double-sealed capillary connector for liquid chromatography according to claim 1, characterized in that, The reinforcement mechanism (4) includes: A sealing ring (41) is provided at one end of a sealing sleeve (31) and the sealing ring (41) is provided on the outer wall of the connector body (1).

6. A low dead volume double-sealed capillary connector for liquid chromatography according to claim 5, characterized in that, Two square plates (42) are fixed to the outer wall of the sealing ring (41), and a block (43) is fixed to one side of each of the two square plates (42). The outer walls of the two blocks (43) are matched with the inner wall of the connector body (1).

7. A low dead volume double-sealed capillary connector for liquid chromatography according to claim 4, characterized in that, The inner wall thread of the limiting plate (5) has two studs (6), and the bottom ends of the two studs (6) are connected to the inner wall thread of the connector body (1).

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