Quick connecting device for liquid adding pipeline and sample adding needle

Abstract

A quick connecting device for a liquid adding pipeline and a sample adding needle relates to the technical field of connecting devices and comprises the liquid adding pipeline, the liquid adding pipeline is inserted into a pipeline joint, one end of the pipeline joint is screwed with an internal thread at one end of a quick replacement joint through an external thread, and a mounting groove is formed in the outer wall of the other end of the quick replacement joint; the mounting groove is in contact connection with one end of the clamping ring, the other end of the quick-change connector is inserted into the fixed quick connector, quick connection threads are arranged outside the fixed quick connector, the fixed quick connector is screwed with the inner wall of the clamping ring through the quick connection threads, and the other end of the fixed quick connector is screwed with the sampling needle through external threads. According to the utility model, the quick connection thread is arranged outside the fixed quick connector, and the fixed quick connector is screwed with the inner wall of the clamping ring through the quick connection thread, so that the sampling needle can be quickly disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of connection devices, in particular to a quick connection device for a liquid adding pipeline and a sample adding needle. Background Art

[0002] In many fully automatic solid phase extraction instruments, the connection between the sample injection needle and the liquid injection pipeline is troublesome, and the process of replacing the sample injection needle consumes a lot of time. Utility Model Content

[0003] The utility model provides a quick connection device for a liquid adding pipeline and a sample adding needle.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A quick connection device for a liquid adding pipeline and a sample adding needle comprises a liquid adding pipeline, which is inserted into a pipeline joint, one end of the pipeline joint is screwed to the internal thread of one end of a quick-change joint through an external thread, an installation groove is provided on the outer wall of the other end of the quick-change joint, the installation groove is in contact with and connected to one end of a clamping ring, the other end of the quick-change joint is inserted into a fixed quick joint, a quick-connect thread is provided on the outside of the fixed quick joint, the fixed quick joint is screwed to the inner wall of the clamping ring through the quick-connect thread, and the other end of the fixed quick joint is screwed to the sample adding needle through an external thread.

[0006] A further preferred solution of the present invention is that a passage is provided among the liquid adding pipeline, the pipeline connector, the quick-change connector, the fixed quick connector and the sample adding needle.

[0007] A further preferred solution of the present invention is that a circular sealing gasket is installed at the screw connection position between the fixed quick connector and the sample addition needle.

[0008] A further preferred solution of the present invention is that a conical sealing gasket is provided at the internal thread of the quick-change joint, the liquid adding pipeline passes through the conical sealing gasket, and the outer wall of the conical sealing gasket contacts and cooperates with the inner wall of the pipeline joint.

[0009] The utility model has the following benefits:

[0010] 1. The utility model solves the problem of fixing the liquid adding pipeline by making the outer wall of the conical sealing gasket contact and cooperate with the inner wall of the pipeline joint, so that the pipeline joint and the quick-change joint can be screwed together to fix the liquid adding pipeline, which is more reliable.

[0011] 2. The utility model provides a quick-connect thread on the outside of the fixed quick connector, and the fixed quick connector is screwed to the inner wall of the clamping ring through the quick-connect thread, so that the sampling needle can be quickly disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1This is a schematic diagram of the main structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present utility model;

[0014] Figure 3 This is a schematic diagram of the enlarged structure of part A of the present utility model;

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the fixed quick connector of the present utility model;

[0016] In the figure: 1 sample injection needle, 2 fixed quick connector, 3 clamping ring, 4 quick change connector, 5 pipeline connector, 6 liquid injection pipeline, 7 conical sealing gasket, 8 round sealing gasket. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] according to Figure 1-3 As shown, a quick connection device for a liquid adding pipeline and a sample adding needle includes a liquid adding pipeline 6, which is inserted into a pipeline connector 5, one end of the pipeline connector 5 is screwed to the internal thread of one end of a quick-change connector 4 through an external thread, and an installation groove is provided on the outer wall of the other end of the quick-change connector 4, and the installation groove is in contact with and connected to one end of a clamping ring 3, and the other end of the quick-change connector 4 is inserted into a fixed quick connector 2, and a quick-connect thread 9 is provided on the outside of the fixed quick connector 2, and the fixed quick connector 2 is screwed to the inner wall of the clamping ring 3 through the quick-connect thread 9, and the other end of the fixed quick connector 2 is screwed to the sample adding needle 1 through an external thread.

[0019] A passage is provided between the liquid adding pipeline 6 , the pipeline connector 5 , the quick change connector 4 , the fixed quick connector 2 and the sample adding needle 1 .

[0020] A circular sealing gasket 8 is installed at the screw connection position between the fixed quick connector 2 and the sample injection needle 1 .

[0021] A conical sealing gasket 7 is provided at the internal thread of the quick-change joint 4 , and the liquid-adding pipeline 6 passes through the conical sealing gasket 7 . The outer wall of the conical sealing gasket 7 contacts and cooperates with the inner wall of the pipeline joint 5 .

[0022] Working principle: By making the outer wall of the conical sealing gasket 7 contact and cooperate with the inner wall of the pipe joint 5, the pipe joint 5 is screwed with the quick-change joint 4, so that the liquid adding pipe 6 can be fixed more reliably. The quick-connect thread 9 is provided on the outside of the fixed quick joint 2, and the fixed quick joint 2 is screwed with the inner wall of the clamping ring 3 through the quick-connect thread 9, so that the sampling needle can be quickly disassembled.

[0023] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quick connection device for a liquid adding pipeline and a sample adding needle, characterized by: The invention comprises a liquid adding pipeline (6), the liquid adding pipeline (6) is inserted into the pipeline joint (5), one end of the pipeline joint (5) is screwed to the internal thread of one end of the quick change joint (4) through an external thread, the other end of the quick change joint (4) is provided with a mounting groove on the outer wall, the mounting groove is in contact with one end of the clamping ring (3), the other end of the quick change joint (4) is inserted into the fixed quick joint (2), the fixed quick joint (2) is provided with a quick connection thread (9), the fixed quick joint (2) is screwed to the inner wall of the clamping ring (3) through the quick connection thread (9), and the other end of the fixed quick joint (2) is screwed to the sample addition needle (1) through an external thread.

2. A quick connection device for a liquid adding pipeline and a sample adding needle according to claim 1, characterized in that: A passage is provided between the liquid adding pipeline (6), the pipeline connector (5), the quick-change connector (4), the fixed quick connector (2) and the sample adding needle (1).

3. The quick connection device for a liquid adding pipeline and a sample adding needle according to claim 1, characterized in that: A circular sealing gasket (8) is installed at the screw connection position between the fixed quick connector (2) and the sample injection needle (1).

4. The quick connection device for a liquid adding pipeline and a sample adding needle according to claim 1, characterized in that: A conical sealing gasket (7) is provided at the internal thread of the quick-change joint (4), the liquid-adding pipeline (6) passes through the conical sealing gasket (7), and the outer wall of the conical sealing gasket (7) contacts and cooperates with the inner wall of the pipeline joint (5).

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