High-pressure connector of liquid chromatographic column

Abstract

The utility model discloses a liquid chromatographic column high pressure joint which comprises a joint main body, the outer side of the joint main body is provided with an external thread I, the external thread I is connected with a thread arranged on the outer side of a liquid chromatographic column, the joint main body is internally provided with a hose placing channel, and the middle part of the joint main body is provided with an air pressure sealing mechanism. An adjusting cavity is formed in the front end of the connector body, a movable seat is slidably mounted in the adjusting cavity, a spring is mounted at the rear end of the movable seat, and a hose fixing head is arranged at the front end of the movable seat. The adjusting cavity is matched with the spring and the moving seat, the length of the hose extending into the chromatographic column can be freely adjusted according to actual conditions, the runner hose can be clamped through the hose fixing head, displacement of the runner hose is avoided, the air pressure sealing mechanism is arranged, and after the runner hose is connected with the chromatographic column, air is inflated into the air pressure sealing mechanism, so that the air pressure sealing mechanism is sealed. The sealing air bag is expanded, sealing is completed, and the liquid leakage phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid chromatography, in particular to a liquid chromatography column high-pressure connector. Background Art

[0002] A liquid chromatography column connector is an interface used to connect a liquid chromatography column to other components of a liquid chromatography system. It is typically located at the end of the column and is used to tightly connect to the injector or other components of the liquid chromatography system, ensuring that the mobile phase and sample can flow smoothly through the column for analysis. Due to differences in column tubing, the length of the column tip can vary. Improper connection can result in dead volume or lead to leakage due to the length difference.

[0003] Existing high-pressure connectors for liquid chromatography columns are often directly connected to the chromatography column through threads, and the length of the flow hose extending into the chromatography column cannot be adjusted. In addition, the current connectors have poor sealing performance and the flow hose itself is not fixed. When pressure is generated, the hose position is easily offset, increasing the probability of dead volume or leakage. Based on this, further improvements are needed. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid chromatography column high-pressure connector, which has the advantages of good sealing and the ability to freely adjust the length of the hose inserted according to actual conditions, so as to solve the problem proposed in the above-mentioned background technology that the length of the flow channel hose inserted into the chromatography column cannot be adjusted, and the sealing is poor, which easily causes the hose position to shift.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a high-pressure connector for a liquid chromatography column, comprising a connector body, an external thread one being provided on the outside of the connector body, the external thread one being connected to a thread provided on the outside of the liquid chromatography column, a hose placement channel being provided inside the connector body, an air pressure sealing mechanism being provided in the middle of the connector body, an adjustment cavity being provided inside the front end of the connector body, a movable seat being slidably installed in the adjustment cavity, a spring being installed at the rear end of the movable seat, and a hose fixing head being provided at the front end of the movable seat;

[0006] The hose fixing head includes a fixed terminal and a connecting cylinder, the connecting cylinder is installed at the rear end of the fixed terminal, the fixed terminal and the connecting cylinder are divided into several equal parts by a rectangular notch, the outer side of the connecting cylinder is provided with a second external thread, and the outer side of the second external thread is provided with a fastening nut.

[0007] Preferably, a tightening auxiliary block is installed at the rear end of the joint body.

[0008] Preferably, the pneumatic sealing mechanism includes an air inlet, a one-way air valve is provided in the air inlet, the lower end of the one-way air valve is connected to an airway, the end of the airway is connected to a sealing airbag, and the sealing airbag is fixed on the outside of the front end of the joint body.

[0009] Preferably, a sealing ring is provided inside the movable seat.

[0010] Preferably, a clamping pad is fixed inside the front end of the fixed terminal.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the liquid chromatography column high-pressure connector can freely adjust the length of the hose extending into the chromatography column according to actual conditions through the adjustment cavity, the spring and the movable seat, thereby avoiding the generation of dead volume and liquid leakage; the flow channel hose can be clamped through the hose fixing head to avoid its displacement; and an air pressure sealing mechanism is provided. After the connection with the chromatography column is completed, gas is filled into the air pressure sealing mechanism to expand the sealing airbag and fill the entire connection space, thereby avoiding liquid leakage and having good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of the connector of the present utility model;

[0015] Figure 3 This is a schematic structural diagram of a hose fixing head of the present utility model;

[0016] Figure 4 This is a schematic diagram of the fixed terminal structure of the utility model.

[0017] Explanation of the reference numerals in the figure: 1. Connector body; 11. Tightening auxiliary block; 2. External thread one; 3. Hose placement channel; 4. Air pressure sealing mechanism; 41. Air inlet; 42. One-way air valve; 43. Airway; 44. Sealing airbag; 5. Adjusting chamber; 6. Spring; 7. Moving seat; 71. Sealing ring; 8. Hose fixing head; 81. Fixed terminal; 82. External thread two; 83. Fastening nut; 84. Connecting cylinder; 85. Clamping pad. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 4 , The utility model provides an embodiment: a liquid chromatography column high-pressure connector, characterized in that: it includes a connector body 1, a tightening auxiliary block 11 is installed at the rear end of the connector body 1, and an external thread 2 is provided on the outside of the connector body 1. By turning the tightening auxiliary block 11 with a wrench, the connector body 1 can be driven to rotate to achieve its connection with the liquid chromatography column, a hose placement channel 3 is provided inside the connector body 1, and the hose placement channel 3 is used to install a flow channel hose, an air pressure sealing mechanism 4 is provided in the middle of the connector body 1, an adjusting chamber 5 is provided inside the front end of the connector body 1, a movable seat 7 is slidably installed in the adjusting chamber 5, a spring 6 is installed at the rear end of the movable seat 7, a sealing ring 71 is provided inside the movable seat 7, and a hose fixing head 8 is provided at the front end of the movable seat 7;

[0021] In combination with the above-mentioned structural features, when the utility model is working, the length of the hose extending into the chromatographic column can be freely adjusted according to actual conditions by adjusting the cavity 5 in conjunction with the spring 6 and the movable seat 7. The flow channel hose can be clamped by the hose fixing head 8 to prevent it from displacement, and an air pressure sealing mechanism 4 is provided to increase the connection sealing and avoid leakage.

[0022] See also Figure 1-Figure 4 The hose fixing head 8 includes a fixed terminal 81 and a connecting cylinder 84. The connecting cylinder 84 is installed at the rear end of the fixed terminal 81. The fixed terminal 81 and the connecting cylinder 84 are divided into several equal parts by a rectangular notch. The outer side of the connecting cylinder 84 is provided with an external thread 82. The outer side of the external thread 82 is provided with a fastening nut 83. A clamping pad 85 is fixed inside the front end of the fixed terminal 81.

[0023] In combination with the above-mentioned structural features, when the present invention is in operation, after the flow hose is passed through the hose placement channel 3, it is inserted into the fixed terminal 81 from the connecting cylinder 84, and then the fastening nut 83 is rotated clockwise to move it closer to the front end of the fixed terminal 81, pressing the clamping pad 85 inward, thereby fixing the flow hose.

[0024] See also Figure 1-Figure 4 The air pressure sealing mechanism 4 includes an air inlet 41, a one-way air valve 42 is provided in the air inlet 41, the lower end of the one-way air valve 42 is connected to an air passage 43, the end of the air passage 43 is connected to a sealing air bag 44, and the sealing air bag 44 is fixed to the outside of the front end of the joint body 1;

[0025] Combined with the above structural features, when the present invention is working, after the connector is connected to the chromatographic column, gas is injected into the air pressure sealing mechanism 4 through the air inlet 41 to expand the sealing airbag 44 and fill the entire connection space, thereby avoiding leakage and achieving good sealing performance.

[0026] Working principle: When the present invention is in use, the length of the hose extending into the chromatographic column can be freely adjusted according to actual conditions by adjusting the cavity 5 in conjunction with the spring 6 and the movable seat 7. When in use, after the flow hose is passed through the hose placement channel 3, it is passed into the fixed terminal 81 from the connecting column 84, and then the fastening nut 83 is rotated clockwise to make it move closer to the front end of the fixed terminal 81, pressing the clamping pad 85 inward, thereby fixing the flow hose, and then inserting the hose fixing head 8 into the movable seat 7, and then connecting the joint body 1 to the chromatographic column. When connecting, the hose fixing head 8 is inserted into the interior of the chromatographic column, and the auxiliary block 11 is tightened by a wrench to drive the joint body 1 to rotate, thereby realizing its connection with the liquid chromatography column. When the hose contacts the chromatographic column, it will move backward and will no longer continue to extend into the chromatographic column, so that the length of the hose extending into the chromatographic column is always maintained at an appropriate degree, which is highly practical.

[0027] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A liquid chromatography column high pressure connector, characterized in that: The invention comprises a joint body (1), wherein an external thread (2) is provided on the outside of the joint body (1), wherein the external thread (2) is connected to a thread provided on the outside of a liquid chromatography column, wherein a hose placement channel (3) is provided inside the joint body (1), wherein an air pressure sealing mechanism (4) is provided in the middle of the joint body (1), wherein an adjustment cavity (5) is provided inside the front end of the joint body (1), wherein a movable seat (7) is slidably installed in the adjustment cavity (5), wherein a spring (6) is installed at the rear end of the movable seat (7), and wherein a hose fixing head (8) is provided at the front end of the movable seat (7); The hose fixing head (8) comprises a fixed terminal (81) and a connecting column (84), wherein the connecting column (84) is mounted at the rear end of the fixed terminal (81), and the fixed terminal (81) and the connecting column (84) are divided into several equal parts by a rectangular notch, and the outer side of the connecting column (84) is provided with a second external thread (82), and the outer side of the second external thread (82) is provided with a fastening nut (83).

2. A liquid chromatography column high pressure connector according to claim 1, characterized in that: A tightening auxiliary block (11) is installed at the rear end of the joint body (1).

3. The liquid chromatography column high-pressure connector according to claim 1, characterized in that: The air pressure sealing mechanism (4) includes an air inlet (41), a one-way air valve (42) is provided in the air inlet (41), the lower end of the one-way air valve (42) is connected to an air passage (43), the end of the air passage (43) is connected to a sealing air bag (44), and the sealing air bag (44) is fixed to the outside of the front end of the joint body (1).

4. The liquid chromatography column high-pressure connector according to claim 1, characterized in that: A sealing ring (71) is provided inside the movable seat (7).

5. The liquid chromatography column high-pressure connector according to claim 1, characterized in that: A clamping pad (85) is fixed inside the front end of the fixed terminal (81).

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