Connecting piston of preparative chromatographic column

Abstract

The utility model relates to the technical field of connecting pistons, and discloses a preparative chromatographic column connecting piston which comprises a piston rod, a piston head is slidably connected to the inner wall of the piston rod, a containing groove is formed in the upper side face of the piston head, and a backing ring made of rubber is placed on the inner wall of the piston head located in the containing groove. The connector can be stored through the storage groove, the locking block on the positioning ring enters the locking groove from the locking hole to lock the positioning ring, the arc-shaped sealing ring can achieve the sealing effect, the connector is squeezed upwards under the elastic effect of the backing ring, stability of the positioning ring and the locking block is guaranteed, and the sealing effect of the connector is improved. The fixing rod is inserted into the piston head and enters the piston rod, the first sealing ring plays a sealing role, so that the locking rod is glued and inserted into the fixing rod, a positioning role can be played when glue is solidified, and the device is simple in installation mode, firm in fixation, not prone to loss and capable of preventing liquid leakage, enhancing the accuracy of experimental results and prolonging the service life of the chromatographic column.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting pistons, in particular to a connecting piston for a preparation type chromatography column. Background Art

[0002] Liquid chromatography separation technology is used to effectively separate mixture samples with multiple components. The core component is the liquid chromatography separation column. The separation principle is to dissolve the mixed component sample in a mobile phase. The mobile phase flows through the chromatographic packing filled in the chromatographic column at a certain flow rate under high pressure conditions. Due to the different adsorption forces of the chromatographic packing on different components, different components will flow through the chromatographic packing at different flow rates. The time when different components flow out of the chromatographic column and the content of each component are detected in the detector of the liquid chromatograph, thereby achieving the purpose of separation and detection.

[0003] The patent document with authorized announcement number CN204428896U discloses that the utility model discloses a chromatographic column piston, including a sieve plate, a distributor, a piston ring, a piston head, a joint, a pipeline and a piston rod connected in sequence, the piston head including a first end and a second end relative to each other, the first end being threadedly connected to the piston ring, the second end being provided with a groove, the piston head and the joint being respectively provided with a first center hole and a second center hole penetrating along their respective axes, the joint being threadedly connected to the piston head inside the groove, one end of the pipeline being threadedly connected to the joint, and the other end of the pipeline passing through the inside of the piston rod and extending to the outside of the piston rod, the multiple components of the above-mentioned chromatographic column piston are threadedly connected, one end of the pipeline is connected to the piston head through a separate joint, and the other end of the pipeline is led out from the piston rod. This unique lead-out method makes the stability better. Compared with the piston of the traditional dynamic axial compression column, the chromatographic column piston has a simple structure, is easy to replace vulnerable components, and has good durability.

[0004] The above devices are installed using threads during implementation, and the threads will wear out during use and maintenance, which may cause a loose seal. This can cause leakage in the chromatographic column, affecting the accuracy of experimental results and the service life of the chromatographic column. Utility Model Content

[0005] The present invention aims to provide a piston for connecting a preparative chromatography column, which solves the problem that the threads of the above devices, which are installed by threading during use and maintenance, may be worn and thus cause a loose seal. This can lead to leakage of the chromatography column, affecting the accuracy of experimental results and the service life of the chromatography column.

[0006] The cam is provided with a plurality of locking plates, and the locking plates are provided with a plurality of locking plates, the locking plates being provided with a plurality of locking plates at a rear end.

[0007] By adopting the above technical solution, the receiving groove can be used to store the joint, and the locking block on the positioning ring enters the locking groove from the locking hole to lock the positioning ring, and the arc-shaped sealing ring can play a sealing role, and under the elastic action of the gasket, it plays an upward squeezing role on the joint to ensure the stability of the positioning ring and the locking block, and the fixing rod is inserted into the piston head into the piston rod, and the first sealing ring plays a sealing role, so that the locking rod is coated with glue and inserted into the fixing rod, which can play a positioning role when the colloid solidifies. Its installation method is simple, the fixation is firm, and it is not easy to wear, prevents leakage, and enhances the accuracy of the experimental results and the service life of the chromatographic column.

[0008] Optionally, a pipeline is installed at the upper end of the joint, and an opening is provided on the outer wall above the piston rod, and the pipeline passes through the opening.

[0009] By adopting the above technical solution, the joint can fix the pipeline, and the pipeline passes through the opening, which is more stable and the pipeline installed with the joint is more convenient to disassemble.

[0010] Optionally, a distributor is placed between the piston head and the screen cylinder.

[0011] By adopting the above technical solution, the space between the piston head and the screen cylinder can be used to place the distributor.

[0012] Optionally, two sealing grooves are provided on the outer wall of the piston head, and second sealing rings are respectively clamped on the inner wall of the piston head located inside the two sealing grooves.

[0013] By adopting the above technical solution, the two second sealing rings can achieve a sealing effect between the piston head and the cylinder.

[0014] Optionally, a PTFE gasket is placed between the piston head and the piston rod, and the fixing rod slides through the PTFE gasket.

[0015] By adopting the above technical solution, the PTFE gasket can play a role of barrier sealing between the piston head and the piston rod.

[0016] Optionally, the fixing rod, locking rod and locking block are made of steel.

[0017] By adopting the above technical solution, the fixing rod, the locking rod and the locking block are made of steel, thereby achieving a better fixing effect.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] The technical solution of the present application can receive the joint through the receiving groove, and the locking block on the positioning ring enters the locking groove from the locking hole to lock the positioning ring, and the arc-shaped sealing ring can seal, and under the elastic action of the gasket, it squeezes the joint upward to ensure the stability of the positioning ring and the locking block, and the fixing rod is inserted into the piston head into the piston rod, and the first sealing ring plays a sealing role, so that the locking rod is coated with glue and inserted into the fixing rod, which can play a positioning role when the colloid solidifies. Its installation method is simple, the fixation is firm, and it is not easy to wear, prevents leakage, and enhances the accuracy of the experimental results and the service life of the chromatographic column. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 This is a front view schematic diagram of the connection piston of the preparative chromatographic column of the utility model;

[0022] Figure 2 This is a front view of a partial cross-sectional view of a connecting piston of a preparative chromatography column of the present invention;

[0023] Figure 3 The utility model is a preparative chromatographic column connecting piston Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a bottom view schematic diagram of the positioning ring of the preparative chromatography column connected to the piston of the utility model;

[0025] Figure 5 This is a top view of the piston head of the preparative chromatographic column connected to the piston of the utility model.

[0026] In the figure: 1. Piston rod; 2. Piston head; 3. First sealing ring; 4. Screen cylinder; 5. Fixing rod; 6. Locking rod; 7. Positioning ring; 8. Locking block; 9. Arc sealing ring; 10. Locking hole; 11. PTFE gasket; 12. Distributor; 13. Second sealing ring; 14. Opening; 15. Pipeline; 16. Gasket; 17. Connector. DETAILED DESCRIPTION

[0027] See also Figure 1-5 The utility model provides a technical solution: a preparative chromatography column connecting piston, comprising a piston rod 1, the inner wall of the piston rod 1 is slidably connected to a piston head 2, the upper side of the piston head 2 is provided with a receiving groove, a gasket 16 is placed on the inner wall of the piston head 2 located inside the receiving groove, the gasket 16 is made of rubber, the upper end of the gasket 16 abuts against a joint 17, the upper end of the joint 17 abuts against a positioning ring 7, a locking groove is provided on the upper side of the piston head 2, and a locking hole 10 is provided on the upper side of the piston head 2 located above the locking groove. The inner wall of the piston head 2 located inside the locking groove is slidably connected with a locking block 8 and an arc-shaped sealing ring 9. The locking block 8 is the same size as the locking hole 10. The lower end of the piston head 2 is provided with a first sealing ring 3, and the lower end of the first sealing ring 3 is provided with a screen cylinder 4. Four groups of fixing rods 5 are slidably penetrated through the inner wall of the screen cylinder 4, and the four groups of fixing rods 5 are slidably penetrated into the inner wall of the piston rod 1. Four groups of locking rods 6 are slidably penetrated through the inner wall of the piston rod 1. The four groups of locking rods 6 are respectively slidably penetrated through the four groups of fixing rods 5 and extend to the inner wall of the piston rod 1;

[0028] A PTFE gasket 11 is placed between the piston head 2 and the piston rod 1, and the fixing rod 5 slides through the PTFE gasket 11. A distributor 12 is placed between the piston head 2 and the screen cylinder 4. The fixing rod 5, the locking rod 6 and the locking block 8 are made of steel.

[0029] In the technical solution of the present invention, the receiving groove can be used to receive the joint 17, and the locking block 8 on the positioning ring 7 enters the locking groove from the locking hole 10 to lock the positioning ring 7, and the arc-shaped sealing ring 9 can play a sealing role, and under the elastic action of the gasket 16, the joint 17 is squeezed upward to ensure the stability of the positioning ring 7 and the locking block 8, and the fixing rod 5 is inserted into the piston head 2 into the piston rod 1, and the first sealing ring 3 plays a sealing role, so that the locking rod 6 is coated with glue and inserted into the fixing rod 5, which can play a positioning role when the colloid solidifies. Its installation method is simple, firmly fixed, and not easy to wear, preventing leakage, enhancing the accuracy of the experimental results and the service life of the chromatographic column.

[0030] In addition, the PTFE gasket 11 can serve as a barrier and seal for the piston head 2 and the piston rod 1, and the space between the piston head 2 and the screen cylinder 4 can serve as a placement for the distributor 12. The fixing rod 5, the locking rod 6 and the locking block 8 are made of steel, so that a better fixing effect can be achieved.

[0031] In the technical solution of the present utility model, Figure 1 As shown, a pipeline 15 is installed at the upper end of the joint 17, and an opening 14 is opened on the outer wall above the piston rod 1. The pipeline 15 passes through the opening 14. The joint 17 can fix the pipeline 15. The pipeline 15 passing through the opening 14 has better stability, and the pipeline 15 installed with the joint 17 is more convenient to disassemble.

[0032] In the technical solution of the present utility model, Figure 1 and Figure 2 As shown, the outer wall of the piston head 2 is provided with two sealing grooves, and the inner wall of the piston head 2 located inside the two sealing grooves is respectively clamped with second sealing rings 13. The two second sealing rings 13 can play a sealing role between the piston head 2 and the column.

[0033] When in use, first, the receiving groove can be used to receive the joint 17, and the locking block 8 on the positioning ring 7 enters the locking groove from the locking hole 10 to lock the positioning ring 7, and the arc-shaped sealing ring 9 can play a sealing role, and under the elastic action of the gasket 16, the joint 17 is squeezed upward to ensure the stability of the positioning ring 7 and the locking block 8, and the fixing rod 5 is inserted into the piston head 2 into the piston rod 1, and the first sealing ring 3 plays a sealing role, so that the locking rod 6 is glued and inserted into the fixing rod 5, which can play a positioning role when the colloid solidifies. The method is simple, firmly fixed, not easy to wear, prevents leakage, enhances the accuracy of experimental results and the service life of the chromatographic column, and the joint 17 can fix the pipeline 15, and the pipeline 15 passes through the opening 14, which is more stable, and the pipeline 15 installed by the joint 17 is more convenient to disassemble, and the space between the piston head 2 and the sieve cylinder 4 can serve as a placement for the distributor 12, the two second sealing rings 13 can seal between the piston head 2 and the column, and the PTFE gasket 11 can block and seal the piston head 2 and the piston rod 1.

Claims

1. A preparative chromatographic column connecting piston, characterized in that: The invention comprises a piston rod (1), wherein the inner wall of the piston rod (1) is slidably connected to a piston head (2), a receiving groove is provided on the upper side of the piston head (2), a gasket (16) is placed on the inner wall of the piston head (2) inside the receiving groove, the gasket (16) is made of rubber, the upper end of the gasket (16) abuts against a joint (17), the upper end of the joint (17) abuts against a positioning ring (7), a locking groove is provided on the upper side of the piston head (2), a locking hole (10) is provided on the upper side of the piston head (2) above the locking groove, and the inner wall of the piston head (2) inside the locking groove is provided with a locking hole (10). The wall is slidably connected with a locking block (8) and an arc-shaped sealing ring (9), the locking block (8) is the same size as the locking hole (10), the lower end of the piston head (2) is provided with a first sealing ring (3), the lower end of the first sealing ring (3) is provided with a screen cylinder (4), the inner wall of the screen cylinder (4) is slidably penetrated with four groups of fixing rods (5), and the four groups of fixing rods (5) are slidably penetrated into the inner wall of the piston rod (1), the inner wall of the piston rod (1) is slidably penetrated with four groups of locking rods (6), and the four groups of locking rods (6) are respectively slidably penetrated through the four groups of fixing rods (5) and extend to the inner wall of the piston rod (1).

2. The preparative chromatographic column connecting piston according to claim 1, wherein A pipeline (15) is installed at the upper end of the joint (17), and an opening (14) is opened on the outer wall above the piston rod (1), and the pipeline (15) passes through the opening (14).

3. The preparative chromatographic column connecting piston according to claim 1, wherein A distributor (12) is placed between the piston head (2) and the screen cylinder (4).

4. The preparative chromatography column connecting piston according to claim 1, characterized in that Two sealing grooves are formed on the outer wall of the piston head (2), and second sealing rings (13) are respectively clamped on the inner wall of the piston head (2) located inside the two sealing grooves.

5. The preparative chromatography column connecting piston according to claim 1, characterized in that, A PTFE gasket (11) is placed between the piston head (2) and the piston rod (1), and the fixing rod (5) slides through the PTFE gasket (11).

6. The preparative chromatography column connecting piston according to claim 1, characterized in that The fixing rod (5), the locking rod (6) and the locking block (8) are made of steel.

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