Multi-channel connecting joint for liquid phase instrument

Abstract

The utility model discloses a multi-channel connecting joint for a liquid phase instrument, and particularly relates to the technical field of liquid phase instrument parts, the multi-channel connecting joint comprises a chromatographic column connecting pipe, a switching main pipe, a middle opening and closing pipe and a tail opening and closing pipe; the chromatographic column connecting pipe is rotationally connected with the end part of the transfer main pipe in a sleeving manner, a first liquid passing opening is formed in the chromatographic column connecting pipe, and a first liquid outlet pipe is arranged in the rotating range of the first liquid passing opening; the transfer main pipe is rotationally sleeved with the middle opening and closing pipe, a second liquid passing opening is formed in the middle opening and closing pipe, and a second liquid outlet pipe is arranged within the rotating range of the second liquid passing opening; and the tail opening and closing pipe is rotationally arranged in the hollow interior of the transfer main pipe in a penetrating mode, the end of the tail opening and closing pipe is detachably connected with the middle opening and closing pipe, a third liquid passing opening is formed in the tail opening and closing pipe, and the third liquid passing opening is correspondingly arranged and communicated with the third liquid outlet pipe. According to the multi-channel connector, connections between a chromatographic column and different detectors can be replaced under the condition that a pump is not cut off, so that the experiment process is not influenced.

Description

Technical Field

[0001] This application relates to the technical field of liquid chromatography instrument parts, and in particular to a multi-channel connector for liquid chromatography instruments. Background Technology

[0002] The chromatographic column (inside the column oven) is often connected to the detector. Due to the needs of the detection work, it is often necessary to connect the chromatographic column to different detectors. During the connection, sometimes it is a one-to-one connection, sometimes a one-to-two connection, or sometimes a one-to-three connection. In the above connection process, it is often necessary to stop the pump, which can easily affect the progress of the experiment.

[0003] Therefore, setting up the connection between different detectors and chromatographic columns in order to achieve the desired results while the instrument is in operation is a problem that researchers urgently need to solve. Utility Model Content

[0004] This invention provides a multi-channel connector for liquid chromatography instruments, which allows for the replacement of connections between chromatographic columns and different detectors without interrupting the pump, thus not affecting the experimental process.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A multi-channel connector for a liquid chromatography instrument includes a column connection tube, a transfer main tube, an intermediate start / stop tube, and a final start / stop tube.

[0007] The ends of the chromatographic column connecting tube and the transfer main tube are rotatably sleeved together. The chromatographic column connecting tube is provided with a No. 1 liquid inlet, and a No. 1 liquid outlet is provided within the rotation range of the No. 1 liquid inlet. The middle opening and closing tube is rotatably sleeved on the transfer main tube. The middle opening and closing tube is provided with a No. 2 liquid inlet, and a No. 2 liquid outlet is provided within the rotation range of the No. 2 liquid inlet. The final opening and closing tube is rotatably inserted into the hollow interior of the transfer main tube, and its end is detachably connected to the middle opening and closing tube. The final opening and closing tube is provided with a No. 3 liquid inlet, which is correspondingly connected to the No. 3 liquid outlet.

[0008] The connection between the chromatographic column and different detectors is achieved by coordinating the column connecting tube, the transfer main tube, the middle opening and closing tube, and the final opening and closing tube to control the opening and closing of the first liquid inlet, the second liquid inlet, and the third liquid inlet.

[0009] Preferably, the inner end of the adapter tube is provided with a fixing protrusion ring, and correspondingly, the side end of the chromatographic column connecting tube is provided with a groove that matches the fixing protrusion ring.

[0010] Preferably, the outer end of the central opening and closing tube is provided with a positioning ring, and correspondingly, the inner end of the transfer main tube is provided with a positioning slide rail adapted to the positioning ring.

[0011] Preferably, the inner end of the middle opening and closing tube is provided with a fixing sleeve, the fixing sleeve is provided with threads, and the end of the final opening and closing tube is provided with a threaded section that matches the threads.

[0012] Among them, after the end-opening and closing pipe is connected by threads and a fixed sleeve, the connection between the second liquid inlet and the second liquid outlet pipe can be controlled by rotating the middle opening and closing pipe alone.

[0013] As a preferred option, a rubber sealing ring is provided at the connection between the transfer main pipe and the final opening / closing pipe.

[0014] The rubber sealing ring mainly serves to prevent water leakage.

[0015] Preferably, a retaining ring is provided on the end-opening / closing pipe.

[0016] The main function of the clamping ring is to fit tightly against the inside of the transfer main pipe so that the No. 3 liquid inlet can be connected to the No. 3 liquid outlet pipe.

[0017] Preferably, the end of the unopening / closing pipe facing away from the main transfer pipe is provided with a rotating handle.

[0018] Compared with the prior art, the advantages or beneficial effects of the technical solution of this application include:

[0019] 1. By controlling the flow of the mobile phase between the main transfer pipe, the intermediate opening / closing pipe, and the final opening / closing pipe, as well as between the first, second, and third outlet pipes, the flow direction of the mobile phase can be controlled, enabling individual or simultaneous connection between the chromatographic column and different detectors. In all of the above processes, it is not necessary to stop the pump, increasing the convenience of experimental operation.

[0020] 2. By controlling the flow direction of the mobile phase through the aforementioned multi-channel connection joints, researchers can avoid contact with the organic phase when stopping the pump and reconnecting it. This reduces the likelihood of researchers coming into contact with hazardous materials. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of a multi-channel connector for a liquid phase instrument;

[0022] Figure 2 This is a top view of a multi-channel connector for a liquid phase instrument.

[0023] Figure 3 This is a cross-sectional view of a multi-channel connector for a liquid chromatography instrument.

[0024] Figure 4 for Figure 3 Enlarged view of part A in the image.

[0025] In the diagram: 1. Rotating handle, 2. End-opening / closing tube, 3. No. 3 liquid outlet tube, 4. No. 2 liquid outlet tube, 5. No. 1 liquid outlet tube, 6. Adapter main tube, 7. Chromatographic column connecting tube, 8. Fixing convex ring, 9. No. 1 liquid inlet, 10. Thread, 11. Fixing sleeve, 12. Positioning ring, 13. Positioning slide rail, 14. No. 3 liquid inlet, 15. Clamping ring, 16. Rubber sealing ring, 17. Middle-opening / closing tube, 18. No. 2 liquid inlet. Detailed Implementation

[0026] The following detailed description of the embodiments of this application, in conjunction with the accompanying drawings, will provide a thorough understanding of how this application uses technical means to solve technical problems and achieve corresponding technical effects, enabling its implementation. The embodiments of this application and the various features within them can be combined with each other without conflict, and all resulting technical solutions are within the protection scope of this application.

[0027] It should be clearly stated that the embodiments described below are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. Example

[0028] This embodiment provides a detailed explanation of the multi-channel connection connector solution:

[0029] like Figure 1-4 As shown, a multi-channel connector for a liquid chromatography instrument includes a column connecting tube 7, a transfer main tube 6, a middle opening / closing tube 17, and a final opening / closing tube 2. The ends of the column connecting tube 7 and the transfer main tube 6 are rotatably sleeved together. The column connecting tube 7 is provided with a first liquid inlet 9, and a first liquid outlet tube 5 is provided within the rotation range of the first liquid inlet 9. The middle opening / closing tube 17 is rotatably sleeved on the transfer main tube 6, and a second liquid inlet 18 is provided on the middle opening / closing tube 17. A second liquid outlet tube 4 is provided within the rotation range of the second liquid inlet 18. The final opening / closing tube 2 is rotatably inserted into the hollow interior of the transfer main tube 6, and its end is detachably connected to the middle opening / closing tube 17. The final opening / closing tube 2 is provided with a third liquid inlet 14, which is correspondingly connected to the third liquid outlet tube 3.

[0030] The inner end of the adapter tube 6 is provided with a fixing protrusion ring 8, and correspondingly, the side end of the chromatographic column connecting tube 7 is provided with a groove that matches the fixing protrusion ring 8.

[0031] The outer end of the central opening and closing pipe 17 is provided with a positioning ring 12, and correspondingly, the inner end of the transfer main pipe 6 is provided with a positioning slide rail 13 that is adapted to the positioning ring 12.

[0032] The inner end of the middle opening and closing tube 17 is provided with a fixing sleeve 11, and the fixing sleeve 11 is provided with a thread 10. The end of the end opening and closing tube 2 is provided with a threaded section that matches the thread 10.

[0033] The working principle and connection relationship of the column connecting tube 7, the transfer main tube 6, the intermediate opening / closing tube 17, and the final opening / closing tube 2 are as follows:

[0034] When using this multi-channel connector, the following connections with the detector can be achieved:

[0035] 1. The chromatographic column is only connected to detector 1.

[0036] by Figure 3 For example, to achieve this state, the column connecting tube 7 needs to be rotated so that its side end has a first liquid inlet 9 connected to a first liquid outlet 5. Simultaneously, after the end-to-end tube 2 is rotated into the fixed sleeve 11, the middle-to-end tube 17 is rotated so that the second liquid inlet 18 on the middle-to-end tube 17 is not connected to the second liquid outlet 4 (misaligned). At the same time, after rotating the end-to-end tube 2 to separate it from the fixed sleeve 11, the end-to-end tube 2 is rotated again so that its third liquid inlet 14 and third liquid outlet 3 are not connected. (In practical applications, it is sufficient that the third liquid inlet 14 and third liquid outlet 3 are not connected; it is not necessary to rotate the end-to-end tube 2 to separate it from the fixed sleeve 11).

[0037] 2. The chromatographic column is only connected to detector 2.

[0038] Similarly, when only the detector 2 needs to be connected, first rotate the column connecting tube 7 until it is not connected to the first outlet tube 5. Then, drive the second liquid inlet 18 on the middle opening and closing tube 17 through the end opening and closing tube 2 to connect it to the second outlet tube 4. At the same time, ensure that the third liquid inlet 14 on the end opening and closing tube 2 is not connected to the third outlet tube 3.

[0039] 3. The chromatographic column is only connected to detector 3.

[0040] In this case, simply rotate the connection between the No. 3 liquid inlet 14 and the No. 3 liquid outlet 3. Meanwhile, the column connection tube 7 and the central opening / closing tube 17 are both closed as described above.

[0041] Similarly, following the steps above, it is possible to achieve either the connection of all chromatographic columns and detectors 1-3, or the connection of any two of the chromatographic columns and detectors 1-3.

[0042] like Figure 4As shown, a rubber sealing ring 16 is provided at the connection between the transfer main pipe 6 and the end-opening / closing pipe 2. The main function of the rubber sealing ring 16 is to prevent leakage of the mobile phase. However, due to its rubber material, it does not affect the sliding between the end-opening / closing pipe 2 and the transfer main pipe 6 (it can be pushed in or pulled out with a little force, so that the No. 3 liquid inlet and the No. 3 liquid outlet pipe are connected).

[0043] In this embodiment, the unopening and closing pipe 2 is provided with a clamping ring 15.

[0044] In this embodiment, a rotating handle 1 is provided at one end of the unopening / closing pipe 2 facing away from the transfer main pipe 6.

[0045] In this multi-channel connection connector, such as Figure 3 and Figure 4 As shown, since there is a gap between the second liquid inlet 18 and the second liquid outlet 4, a pipe with an arc-shaped opening can be connected to the second liquid inlet 18. Similarly, the third liquid inlet 14 is also connected to this type of pipe. However, since the first liquid inlet 9 and the first liquid outlet are fitted together, the first liquid outlet does not need to be connected separately.

Claims

1. A multi-channel connector for a liquid chromatography instrument, characterized in that, It includes a column connection tube (7), a transfer tube (6), an inlet / outlet tube (17), and an outlet / outlet tube (2). The ends of the column connecting tube (7) and the transfer tube (6) are rotatably connected. The column connecting tube (7) is provided with a first liquid inlet (9). A first liquid outlet (5) is provided within the rotation range of the first liquid inlet (9). The middle opening and closing tube (17) is rotatably connected to the transfer tube (6). The middle opening and closing tube (17) is provided with a second liquid inlet (18). A second liquid outlet (4) is provided within the rotation range of the second liquid inlet (18). The end opening and closing tube (2) is rotatably inserted into the hollow interior of the transfer tube (6). The end of the tube is detachably connected to the middle opening and closing tube (17). The end opening and closing tube (2) is provided with a third liquid inlet (14). The third liquid inlet (14) is correspondingly connected to the third liquid outlet (3).

2. The multi-channel connector for a liquid chromatography instrument according to claim 1, characterized in that, The inner end of the adapter tube (6) is provided with a fixing protrusion (8), and correspondingly, the side end of the chromatographic column connecting tube (7) is provided with a groove that matches the fixing protrusion (8).

3. A multi-channel connector for a liquid chromatography instrument according to claim 1, characterized in that, The outer end of the central opening and closing pipe (17) is provided with a positioning ring (12), and correspondingly, the inner end of the transfer main pipe (6) is provided with a positioning slide rail (13) that is adapted to the positioning ring (12).

4. A multi-channel connector for a liquid chromatography instrument according to claim 1, characterized in that, The inner end of the middle opening and closing tube (17) is provided with a fixed sleeve (11), and the fixed sleeve (11) is provided with a thread (10). The end of the end opening and closing tube (2) is provided with a threaded section that matches the thread (10).

5. A multi-channel connector for a liquid chromatography instrument according to claim 1, characterized in that, A rubber sealing ring (16) is provided at the connection between the transfer main pipe (6) and the end-to-end pipe (2).

6. A multi-channel connector for a liquid chromatography instrument according to claim 1, characterized in that, The end-closing pipe (2) is equipped with a clamping ring (15).

7. A multi-channel connector for a liquid chromatography instrument according to claim 1, characterized in that, The end of the end-to-end pipe (2) facing away from the main transfer pipe (6) is provided with a rotating handle (1).

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