Liquid-leakage-proof connector for connecting liquid chromatographic column

Abstract

The utility model discloses a liquid chromatographic column connection liquid leakage prevention connector, and particularly relates to the technical field of liquid chromatographs, the liquid chromatographic column connection liquid leakage prevention connector comprises a hollow connector body, a leakage stopping valve is arranged in the connector body, and the leakage stopping valve comprises an elastic spring, a piston block and a push rod; the piston block is slidably arranged in the hollow interior of the connector body, one end of the elastic spring is fixed to the piston block, and the other end of the elastic spring is fixed to the bottom end of the inner side of the connector body. A sliding groove matched with the push rod to slide is formed in the side, close to the liquid inlet end of the chromatographic column, of the connector body, the push rod is fixed to the piston block, and a liquid channel is formed in the middle of the push rod. And the liquid through pipe is communicated with the joint body. The liquid-leakage-proof connector for connecting the liquid chromatographic column has the advantage that a liquid channel entering the chromatographic column can be cut off after liquid leakage, so that a worker can conveniently replace and maintain the liquid in time.

Description

Technical Field

[0001] This application relates to the technical field of liquid chromatographs, and particularly to a leak-proof connector for connecting a liquid chromatography column. Background Art

[0002] Liquid phase workers are most exposed to the mobile phase, which is the main source of various problems in liquid chromatography. The two most common faults in liquid chromatographs are blockage and leakage. Regarding leakage: When the chromatographic tube and pipeline are connected, leakage often occurs because the connection between the Peek head and the Peek pipeline and the chromatographic column becomes loose, or the Peek head and the Peek pipeline become detached due to an increase in chromatographic pressure.

[0003] After leakage occurs, the liquid accumulates at the chromatographic column head, causing pressure fluctuations and affecting the stability and accuracy of the system. Therefore, it is urgent for staff to design a leak-proof connector that is convenient for detecting leakage to avoid problems such as instrument damage or interference with the experimental process that may be caused by leakage. Utility Model Content

[0004] The utility model provides a leak-proof connector for connecting a liquid chromatography column, which has the advantage that after leakage, the liquid channel entering the chromatographic column can be cut off, facilitating timely replacement and repair by the staff.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A leak-proof connector for connecting a liquid chromatography column includes a hollow connector body. A leak-proof valve is provided inside the connector body, and the leak-proof valve includes an elastic spring, a piston block, and a push rod.

[0007] The piston block is slidably disposed inside the hollow of the connector body. One end of the elastic spring is fixed to the piston block, and the other end is fixed to the inner bottom end of the connector body. A sliding groove for the push rod to slide is provided on one side of the connector body close to the liquid inlet end of the chromatographic column. The push rod is fixed to the piston block, and a liquid channel is provided in the middle of the push rod. A liquid through pipe is communicated with the connector body.

[0008] Among them, by installing the leak-proof valve, when the connector body becomes disconnected from the liquid inlet end of the chromatographic column, resulting in leakage, the piston block can block the liquid inlet of the liquid through pipe to prevent the mobile phase from leaking out.

[0009] Preferably, the connector body is provided with a threaded section, and the connector body is fixedly connected to the liquid inlet end of the chromatographic column by screwing.

[0010] Preferably, a liquid through hole is provided on one side of the push rod close to the piston block.

[0011] Preferably, the connection point of the liquid through pipe and the connector body is located at the bottom end of the hollow part of the connector body.

[0012] Preferably, connectors are screwed and installed at both the liquid inlet end and the liquid outlet end of the chromatographic column, and the two connectors are connected through a liquid pipe.

[0013] Preferably, the connection point of the liquid pipe and the connector is located in the middle of the hollow part of the connector.

[0014] Compared with the prior art, the advantages or beneficial effects of the technical solution of this application include:

[0015] 1. By installing a leak-proof valve, when the connector is disconnected from the liquid inlet end of the chromatographic column and causes liquid leakage, the piston block can block the liquid inlet of the liquid pipe to prevent the mobile phase from leaking out.

[0016] 2. When the staff observes that there is no liquid flow at the liquid inlet port or the liquid outlet port of the chromatographic column, it can be solved by replacing the leak-proof connector, making the operation and maintenance process more convenient and avoiding damage such as instrument short-circuit caused by liquid leakage. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure schematic diagram of a leak-proof connector for connecting a liquid chromatographic column;

[0018] Figure 2 It is a cross-sectional structure schematic diagram of a leak-proof connector for connecting a liquid chromatographic column (in the unconnected state);

[0019] Figure 3 It is a cross-sectional structure schematic diagram of a leak-proof connector for connecting a liquid chromatographic column (in the connected state);

[0020] Figure 4 It is a connection schematic diagram of a leak-proof connector for connecting a liquid chromatographic column and a chromatographic column.

[0021] In the figure: 1. Connector body, 2. Elastic spring, 3. Liquid pipe, 4. Piston block, 5. Liquid through hole, 6. Threaded section, 7. Push rod, 8. Liquid pipe. Detailed Embodiments

[0022] The following will combine the drawings and embodiments to detail the implementation manner of this application, so as to fully understand how this application uses technical means to solve technical problems and the implementation process of achieving corresponding technical effects and implement accordingly. Each feature in the embodiments of this application can be combined with each other without conflict, and the formed technical solutions are all within the protection scope of this application.

[0023] It should be clear that the embodiments described below are only a part of the embodiments of this application, rather than all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application. Embodiment

[0024] As Figures 1 - 4 shown, a leak-proof connector for connecting a liquid chromatography column includes a hollow connector body 1. A leak-proof valve is provided inside the connector body 1. The leak-proof valve includes an elastic spring 2, a piston block 4, and a push rod 7.

[0025] The piston block 4 is slidably arranged inside the hollow of the connector body 1. One end of the elastic spring 2 is fixed to the piston block 4, and the other end is fixed to the inner bottom end of the connector body 1. A chute for sliding the push rod 7 is provided on one side of the connector body 1 close to the liquid inlet end of the chromatography column. The push rod 7 is fixed to the piston block 4, and a liquid channel is provided in the middle of the push rod 7. A liquid through pipe 3 is communicated with the connector body 1.

[0026] The working principle of the leak-proof valve is as follows:

[0027] As Figure 2 shown, it is the state when the connector body 1 is not connected to the liquid inlet end of the chromatography column. In this state, the elastic spring 2 applies a thrust to the piston block 4, so that the piston block 4 is located at the bottommost end of the inner cavity of the connector body 1. At the same time, the connection point between the liquid through pipe 3 and the connector body 1 is just blocked by the side end of the piston block 4, so the mobile phase cannot enter the chromatography column from the push rod 7.

[0028] As Figure 3 shown, it is the state when the connector body 1 is connected to the liquid inlet end of the chromatography column. In this state, after the connector body 1 is screwed in, the push rod 7 contracts after being abutted by the liquid inlet end of the chromatography column, and its upper end squeezes the elastic spring 2, and the piston block 4 also moves upward. At this time, the side end of the piston block 4 no longer blocks the liquid outlet of the liquid through pipe 3, so the mobile phase can smoothly enter the chromatography column from the liquid through hole 5 on the push rod 7.

[0029] When the connector becomes loose or falls off for a long time, since the push rod 7 is no longer tightly abutted against the liquid inlet end of the chromatography column, under the action of the elastic spring 2, the piston block 4 moves downward (taking Figure 2 ... as an example) until the liquid outlet of the liquid through pipe 3 is blocked, so as to prevent the mobile phase from leaking out from the liquid outlet of the push rod 7 and the liquid inlet port of the chromatography column, forming a leak. In actual application, how much distance the piston block moves downward to block the liquid outlet of the liquid through pipe 3 (that is, how much distance the connector body becomes loose or disengages) can be pre-designed according to the actual situation.

[0030] As Figure 1As shown, the joint body 1 is provided with a threaded section 6, and the joint body 1 is screwed and fixed to the liquid inlet end of the chromatographic column. The connection between the joint body 1 and the liquid inlet end of the chromatographic column is through a threaded connection, which has stronger adaptability and can be directly matched with the ports of existing chromatographic columns on the market.

[0031] As Figure 2 shown, a liquid passage hole 5 is provided on one side of the push rod 7 close to the piston block 4.

[0032] As Figure 4 shown, joint bodies 1 are screwed and installed at both the liquid inlet end and the liquid outlet end of the chromatographic column, and the two joint bodies 1 are connected through a liquid connection pipe 8.

[0033] As Figure 4 shown, when the liquid inlet end of the chromatographic column is blocked, the mobile phase will enter the liquid connection pipe 8 for buffering to avoid excessive pressure at the end of the chromatographic column.

Claims

1. A leak-proof connector for connecting a liquid chromatography column, comprising a hollow connector body (1), characterized in that, A leak-proof valve is provided inside the joint body (1), and the leak-proof valve includes an elastic spring (2), a piston block (4), and a push rod (7). The piston block (4) is slidably disposed inside the hollow joint body (1). One end of the elastic spring (2) is fixed to the piston block (4), and the other end is fixed to the inner bottom end of the joint body (1). A chute for sliding the push rod (7) is provided on one side of the joint body (1) close to the liquid inlet end of the chromatographic column. The push rod (7) is fixed to the piston block (4), and a liquid passage is provided in the middle of the push rod (7). The liquid connection pipe (3) is communicated with the joint body (1).

2. The leak-proof liquid joint for connecting a liquid chromatography column according to claim 1, wherein The joint body (1) is provided with a threaded section (6), and the joint body (1) is screwed and fixed to the liquid inlet end of the chromatographic column.

3. A leak-proof connector for connecting a liquid chromatography column according to claim 1, characterized in that, A liquid through hole (5) is provided on the side of the push rod (7) close to the piston block (4).

4. A leak-proof joint for connecting a liquid chromatography column according to claim 1, characterized in that, The connection point of the liquid connection pipe (3) and the joint body (1) is located at the bottom end of the hollow part of the joint body (1).

5. The leak-proof liquid connection joint for a liquid chromatography column according to claim 2, characterized in that, The joint body (1) is screwed and installed at both the liquid inlet end and the liquid outlet end of the chromatographic column, and the two joint bodies (1) are communicated through a liquid connection pipe (8).

6. A leak-proof joint for connecting a liquid chromatography column according to claim 5, characterized in that, The connection point of the liquid connection pipe (8) and the joint body (1) is located in the middle of the hollow part of the joint body (1).

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