Liquid chromatographic column joint

Abstract

The utility model discloses a liquid chromatographic column joint which comprises a column shell, a column cap is mounted at the upper end of the column shell, a middle joint is spirally connected to the inner side of the top end of a lower joint, an upper joint is spirally connected to the outer side of the middle joint, and a ball valve is fixedly connected to the end part of a rotating shaft of a knob. When the chromatographic column connector is used, the upper connector is screwed to clamp and fix a hose, the shifting plate is kneaded by fingers, the lower portion of the clamping piece is aligned with the clamping groove, the lower connector is pressed downwards to be attached to a column cap, and a contact pin at the bottom of the lower connector extrudes a plug, so that liquid in a water pipe can enter a chromatographic column; by means of the ball valve, after the connector is taken down, liquid in the hose cannot leak, under the action of the second spring, the clamping piece is combined with the clamping groove of the column cap, the sleeve connector can achieve fixation and free disassembly and assembly of the hose, opening and closing of the liquid and non-damage combination of the sleeve connector and the chromatographic column, and the sleeve connector has the advantages of being convenient to use and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic column accessories, in particular to a liquid chromatographic column joint. Background Art

[0002] With the continuous development of modern analytical science and technology, liquid chromatography technology has been widely used in chemical analysis, biomedicine, environmental protection and other fields. As the core equipment of liquid chromatography technology, the performance of liquid chromatograph directly affects the accuracy and reliability of the analysis results.

[0003] In liquid chromatographs, the column joint is a key component that connects the chromatographic column and the pump. Its function is to ensure that the sample flows smoothly between the chromatographic column and the pump. At the same time, it must have good sealing performance to prevent sample leakage.

[0004] The joints on the existing chromatographic columns are usually connected by screwing. During the frequent connection process, the threads will be worn, which will affect the sealing between the chromatographic column joint and the chromatographic column. In addition, the existing chromatographic column joints do not have the ability to open and close freely. Therefore, after the joints are removed, the residual liquid in the hose will leak out, causing pollution.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] In view of the problems in the related technology, the utility model proposes a liquid chromatography column connector to overcome the above technical problems existing in the existing related technology.

[0007] To this end, the specific technical solutions adopted by the utility model are as follows:

[0008] A liquid chromatography column joint, comprising a column shell, a column cap is installed on the upper end of the column shell, the top end of the column cap is slidably connected to a lower joint, the inner side of the top end of the lower joint is spirally connected to a middle joint, the outer side of the middle joint is spirally connected to an upper joint, a knob is rotatably installed on the outer side of the lower joint, a ball valve is fixedly connected to the end of the rotating shaft of the knob, a groove is provided on the inner side of the edge of the column cap, a clamping piece is rotatably installed on the outer side of the lower joint, a dial plate is fixedly connected to the top end of the clamping piece, and a second spring is installed between the clamping piece and the lower joint.

[0009] As a further solution of the utility model, an inner side of the top end of the column shell is provided with an internal thread, and a bottom end of the column cap is provided with an external thread, and the column cap is spirally connected to the column shell.

[0010] As a further solution of the utility model, a support plate is fixedly connected to the inner side of the column shell, a slide rod is slidably connected to the inner side of the support plate, a first spring is provided on the outer side of the slide rod, and a plug is fixedly connected to the top end of the slide rod.

[0011] As a further solution of the utility model, the bottom end of the first spring is fixedly connected to the support plate, and the top end of the first spring is fixedly connected to the plug.

[0012] As a further solution of the utility model, the lower joint, the middle joint and the upper joint are provided with a passage that passes through from top to bottom, and the inner upper part of the upper joint is arranged in an inverted cone shape.

[0013] As a further solution of the utility model, a passage is provided in the center of the ball valve, the ball valve is rotatably connected to the lower joint, and a contact pin is provided in the center of the bottom of the lower joint.

[0014] As a further solution of the utility model, the bottom end of the clamp is engaged with the inner wall of the clamp slot, and the clamp and the clamp slot are provided with two groups, and the two groups of the clamp are symmetrically arranged front and back.

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

[0016] The utility model is provided with a column shell, a column cap, a lower joint, a middle joint, an upper joint, a knob, a ball valve, a clamping piece, etc. When the chromatographic column joint is in use, the middle joint is screwed with a wrench to combine with the lower joint, the hose is placed on the upper outer side of the middle joint, and then the upper joint is screwed to clamp the hose, after pinching the paddle with fingers, aligning the lower part of the clamping piece with the slot position, pressing down the lower joint to fit with the column cap, and the contact pin at the bottom of the lower joint squeezes the plug, so that the liquid in the water pipe can enter the chromatographic column, and the ball valve is driven to move by turning the knob, and the ball valve can prevent the liquid in the hose from leaking after the joint is removed, and under the action of the second spring, the clamping piece is combined with the slot of the column cap, thereby ensuring the combination of the lower joint and the column cap, and the joint set can realize the fixation of the hose, free disassembly and assembly, opening and closing of the liquid, and non-destructive combination with the chromatographic column, and the joint set has the advantages of convenient use and extended service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of a liquid chromatography column joint according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the installation structure of a plug of a liquid chromatography column joint according to an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the installation structure of a ball valve and a knob of a liquid chromatography column connector according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the combination of a clamping member and a second spring of a liquid chromatography column connector according to an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the installation structure of a middle joint and an upper joint of a liquid chromatography column joint according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Column shell; 2. Column cap; 3. Internal thread; 4. External thread; 5. Support plate; 6. Slide rod; 7. First spring; 8. Plug; 9. Slot; 10. Clamp; 11. Plate; 12. Lower joint; 13. Knob; 14. Ball valve; 15. Middle joint; 16. Upper joint; 17. Second spring. DETAILED DESCRIPTION

[0025] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] According to an embodiment of the utility model, a liquid chromatography column connector is provided.

[0027] Please refer to the instruction manual Figure 1-5 According to an embodiment of the utility model, a liquid chromatography column joint comprises a column shell 1, a column cap 2 is installed on the upper end of the column shell 1, a lower joint 12 is slidably connected to the top of the column cap 2, a middle joint 15 is spirally connected to the inner side of the top of the lower joint 12, an upper joint 16 is spirally connected to the outer side of the middle joint 15, a knob 13 is rotatably installed on the outer side of the lower joint 12, a ball valve 14 is fixedly connected to the end of the rotating shaft of the knob 13, a card slot 9 is provided on the inner side of the edge of the column cap 2, a clamping member 10 is rotatably installed on the outer side of the lower joint 12, a dial plate 11 is fixedly connected to the top of the clamping member 10, and a second spring 17 is installed between the clamping member 10 and the lower joint 12.

[0028] When the chromatographic column connector is in use, the middle connector 15 is screwed with a wrench to combine with the lower connector 12, the hose is placed on the upper outer side of the middle connector 15, and then the upper connector 16 is screwed to clamp the hose, after pinching the paddle 11 with fingers, aligning the lower part of the clamping member 10 with the position of the clamping slot 9, the lower connector 12 is pressed down to fit with the column cap 2, and the contact pin at the bottom of the lower connector 12 squeezes the plug 8, so that the liquid in the water pipe can enter the chromatographic column, and the ball valve 14 is driven to move by turning the knob 13, and the ball valve 14 can prevent the liquid in the hose from leaking after the connector is removed.

[0029] In one embodiment, please refer to the attached specification Figure 1-5 As a further solution of the utility model, an inner side of the top end of the column shell 1 is provided with an internal thread 3, and a bottom end of the column cap 2 is provided with an external thread 4, and the column cap 2 is spirally connected to the column shell 1.

[0030] The column cap 2 can be combined with the column housing 1 by screwing the column cap 2 .

[0031] In another embodiment, please refer to the attached specification Figure 1-5 As a further solution of the utility model, a support plate 5 is fixedly connected to the inner side of the column shell 1, a slide rod 6 is slidably connected to the inner side of the support plate 5, a first spring 7 is provided on the outer side of the slide rod 6, a plug 8 is fixedly connected to the top end of the slide rod 6, the bottom end of the first spring 7 is fixedly connected to the support plate 5, and the top end of the first spring 7 is fixedly connected to the plug 8.

[0032] Under the action of the first spring 7, the plug 8 is combined with the column cap 2 to achieve rapid sealing.

[0033] In one embodiment, please refer to the attached specification Figure 1-5 As a further solution of the utility model, the lower joint 12, the middle joint 15 and the upper joint 16 are provided with a vertically penetrating passage, and the inner upper part of the upper joint 16 is arranged in an inverted cone shape.

[0034] After the hose is connected to the connector, the liquid inside can be injected into the chromatographic column.

[0035] In another embodiment, please refer to the attached specification Figure 1-5 As a further solution of the utility model, a passage is provided in the center of the ball valve 14 , the ball valve 14 is rotatably connected to the lower joint 12 , and a contact pin is provided in the center of the bottom of the lower joint 12 .

[0036] The ball valve can be moved by turning the knob 13 to open and close the lower joint 12 .

[0037] In one embodiment, please refer to the attached specification Figure 1-5As a further solution of the utility model, the bottom end of the card member 10 is engaged with the inner wall of the card slot 9, and the card member 10 and the card slot 9 are each provided with two groups, and the two groups of the card members 10 are symmetrically arranged front and back.

[0038] The combination of the two sets of clamps 10 and the clamping slots 9 can ensure that the lower connector 12 and the column cap 2 are stably combined.

[0039] When in use, when this set of chromatographic column connector is used, the middle connector 15 is screwed with a wrench to combine with the lower connector 12, the hose is placed on the upper outer side of the middle connector 15, and then the upper connector 16 is screwed to clamp the hose, after pinching the paddle 11 with fingers, align the lower part of the clamping piece 10 with the position of the clamping slot 9, press down the lower connector 12 to fit with the column cap 2, and the contact pin at the bottom of the lower connector 12 squeezes the plug 8, so that the liquid in the water pipe can enter the chromatographic column, and the ball valve 14 is driven to move by turning the knob 13. The ball valve 14 can prevent the liquid in the hose from leaking after the connector is removed. Under the action of the second spring 17, the clamping piece 10 is combined with the clamping slot 9 of the column cap 2, thereby ensuring the combination of the lower connector 12 and the column cap 2.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid chromatography column connector, comprising a column housing (1), characterized in that: A column cap (2) is installed at the upper end of the column shell (1), the top end of the column cap (2) is slidably connected to a lower joint (12), the inner side of the top end of the lower joint (12) is spirally connected to a middle joint (15), the outer side of the middle joint (15) is spirally connected to an upper joint (16), a knob (13) is rotatably installed on the outer side of the lower joint (12), the end of the rotating shaft of the knob (13) is fixedly connected to a ball valve (14), a clamping groove (9) is provided on the inner side of the edge of the column cap (2), a clamping member (10) is rotatably installed on the outer side of the lower joint (12), the top end of the clamping member (10) is fixedly connected to a dial plate (11), and a second spring (17) is installed between the clamping member (10) and the lower joint (12).

2. A liquid chromatography column connector according to claim 1, characterized in that: An internal thread (3) is provided on the inner side of the top end of the column shell (1), an external thread (4) is provided on the bottom end of the column cap (2), and the column cap (2) is spirally connected to the column shell (1).

3. A liquid chromatography column connector according to claim 1, characterized in that: A support plate (5) is fixedly connected to the inner side of the column shell (1), a slide rod (6) is slidably connected to the inner side of the support plate (5), a first spring (7) is provided on the outer side of the slide rod (6), and a plug (8) is fixedly connected to the top end of the slide rod (6).

4. A liquid chromatography column connector according to claim 3, characterized in that: The bottom end of the first spring (7) is fixedly connected to the support plate (5), and the top end of the first spring (7) is fixedly connected to the plug (8).

5. A liquid chromatography column connector according to claim 1, characterized in that: The lower joint (12), the middle joint (15) and the upper joint (16) are provided with a channel penetrating from top to bottom, and the inner upper part of the upper joint (16) is arranged in an inverted cone shape.

6. A liquid chromatography column connector according to claim 1, characterized in that: A passage is provided in the center of the ball valve (14), the ball valve (14) is rotatably connected to the lower joint (12), and a contact pin is provided in the center of the bottom of the lower joint (12).

7. A liquid chromatography column connector according to claim 1, characterized in that: The bottom end of the clamp (10) is clamped with the inner wall of the clamp slot (9), and the clamp (10) and the clamp slot (9) are each provided with two groups, and the two groups of the clamp (10) are symmetrically arranged front and back.

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