CN214041286U

CN214041286U - Structure of sample injection system

Info

Publication number: CN214041286U
Application number: CN202022429014.9U
Authority: CN
Inventors: 李智; 诸葛鑫; 刘金涛
Original assignee: Zhixiang Biology Suzhou Co ltd
Current assignee: Zhixiang Biology Suzhou Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-08-24
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a structure of a sample feeding system, which comprises a three-dimensional motion system, an acquisition device arranged on the three-dimensional motion system and a transition device arranged beside a carrier platform, wherein the acquisition device comprises a suction type needle cylinder; the transition device comprises a transition table, the transition table is provided with a sample containing cavity and a cleaning cavity, the cleaning cavity is connected with the cleaning agent supply device through a cleaning pipeline, and the sample containing cavity can be communicated with the liquid storage device. Before the cylinder of acquisition device extracts liquid sample in the different test tubes, the cylinder extracts the cleaner from wasing the chamber, kicks into the sample appearance chamber with the cleaner again, so, not only the cylinder obtains wasing, and in addition, the sample appearance chamber also obtains wasing. The structure of the sample introduction system in the design cleans the needle cylinder and the sample containing cavity, and guarantees the accuracy of the detection result.

Description

Structure of sample injection system

Technical Field

The utility model relates to a chemical industry field, concretely relates to sampling system of liquid chromatograph.

Background

The hydraulic chromatograph is provided with a sample introduction system, a loading platform for positioning the test tube and a liquid storage device, wherein the sample introduction system transfers liquid in the test tube to the liquid storage device. The test tube provides different liquid, and in order to guarantee the accuracy of detection, the sampling system needs to be washed with the part of liquid contact before the sampling system obtains different liquid.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that: provides a structure of a sample introduction system with a cleaning function.

In order to solve the technical problem, the utility model provides a following technical scheme: the structure of a sample introduction system comprises a three-dimensional motion system, an acquisition device arranged on the three-dimensional motion system, and a transition device arranged beside a carrier platform, wherein the acquisition device comprises a suction type needle cylinder; the transition device comprises a transition table, the transition table is provided with a sample containing cavity and a cleaning cavity, the cleaning cavity is connected with the cleaning agent supply device through a cleaning pipeline, and the sample containing cavity can be communicated with the liquid storage device.

The needle cylinder of the acquisition device extracts a liquid sample from the test tube of the carrying platform, the needle cylinder is driven by the three-dimensional motion system to reach the upper part of the sample containing cavity, the sample is injected into the sample containing cavity, and the sample enters the liquid storage device again for inspection. Before liquid sample in other test tubes of extraction device's cylinder, the cylinder extracts the cleaner from wasing the chamber, injects the cleaner into sample appearance chamber again, so, not only the cylinder obtains wasing, and in addition, sample appearance chamber also obtains wasing, and the back is taken away to the cleaner in sample appearance chamber, and other samples of extraction in other test tubes can be followed to the cylinder to inject sample into sample appearance chamber, and the sample in the sample appearance chamber reentrants the reservoir.

Sampling system's structure, can wash cylinder and sample appearance chamber before acquireing different liquid sample, provide the guarantee for the accuracy of inspection result.

Drawings

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic structural diagram of a sample injection system.

The symbols in the drawings illustrate that:

10. an acquisition device; 11. a needle cylinder; 110. a needle portion; 12. a guide bar; 13. a device body; 14. a movable member; 151. a piston frame; 152. a piston; 153. a reset lever; 154. a first return spring; 16. a power element; 17. a bottom end cap; 18. a limiting member; 19. a second return spring;

20. a transition device; 21. a transition table; 22. a sample chamber; 23. a cleaning chamber; 231. a channel connected to a cleaning agent supply; 24. a middle rotator; 241. a first connector;

30. a cleaning agent supply device;

40. a reservoir; 41. a second connector;

50. a frame;

60. a test tube; 61. a jig.

Detailed Description

Referring to fig. 1, a sample injection system structure includes a three-dimensional motion system, an obtaining device 10 installed on the three-dimensional motion system, and a transition device 20 disposed beside a carrier, where the obtaining device includes a suction syringe 11; the transition device comprises a transition table 21, the transition table is provided with a sample containing cavity 22 and a cleaning cavity 23, the cleaning cavity is connected with a cleaning agent supply device 30 through a cleaning pipeline, and the sample containing cavity can be communicated with a liquid storage device 40.

The three-dimensional motion system is mounted on a frame 50 of the hydraulic chromatograph, can perform three-dimensional motion in an X axis direction, a Y axis direction and a Z axis direction, and is a motion system commonly used in the prior art.

The test tubes 60 containing different liquid samples are inserted into the insertion holes provided with the jigs 61, which are positioned on the carrier. Under the drive of the three-dimensional motion system, the acquisition device can be vertically and horizontally translated to the upper part of the test tube, then vertically descends, and samples are extracted from the test tube. The sample is then injected into the sample chamber 22 under the drive of the three-dimensional motion system. The sample in the sample volume then enters the reservoir 40. Before the needle cylinder extracts different samples, under the driving of the three-dimensional motion system, the needle part 110 of the needle cylinder extends into the cleaning cavity 23, and the cleaning agent firstly cleans the needle part; the cleaning agent is extracted from the needle cylinder, and the cleaning agent cleans the inner cavity of the needle cylinder. Under the drive of the three-dimensional motion system, the syringe injects the cleaning agent into the sample cavity, and the sample cavity is cleaned by the cleaning agent. In this way, the syringe 11 draws other samples from the test tube and injects them into the sample chamber 22 under the driving of the three-dimensional motion system, on the premise that the syringe and the sample chamber are clean.

The bottom of transition platform 21 is equipped with well turning 24, and well turning is equipped with the transfer chamber, is equipped with a plurality of first connectors 241 on the well turning, and one of them first connector is connected with cleaner recovery vessel, and a plurality of second connectors 41 on other first connectors and the reservoir 40 pass through the pipeline butt joint one by one. The second connector is provided with an electromagnetic valve, different samples enter the liquid storage device through different first connectors and second connectors, for example, one sample enters the liquid storage device through one first connector, a corresponding pipeline and a corresponding second connector, at the moment, the electromagnetic valve in the corresponding second connector is opened, the electromagnetic valves in other second connectors are closed, and the sample is pumped into the liquid storage device under the action of the pump in the liquid storage device. When it is desired to pump out the cleaning agent which first enters the sample chamber 22 and then flows into the central swivel 24, the pump in the cleaning agent recovery reservoir operates to evacuate the cleaning agent in the sample chamber and the central swivel.

The acquiring device 10 comprises a device body 13 fixed on a guide rod 12, a movable piece 14 movably matched on the guide rod, and a piston assembly connected with the movable piece, wherein the guide rod is installed on a three-dimensional motion system, the piston assembly comprises a piston frame 151, a piston 152 installed on the piston frame and matched with the suction type needle cylinder 11, a reset rod 153 installed on the piston frame, and a first reset spring 154 abutted against the reset rod, the reset rod is movably inserted into the device body, and the first reset spring is arranged at the bottom of the device body; the movable member is connected to the power element 16. Under the drive of the power element, the piston frame 151 descends, the piston 152 and the reset rod 153 descend, and the reset rod compresses the first reset spring 154; after the power element releases the piston frame, the first return spring drives the piston frame to ascend and return, the piston ascends and returns, the needle cylinder 11 is vacuumized, and a sample is extracted. Because the first return spring is adopted, the power element can be a simple pneumatic element, such as a cylinder with unidirectional motion, and the pneumatic element is inflated when going forward and deflated when returning. As a modification, the guide rod 12 is provided with a second return spring 19, which is located between the movable member and the apparatus body.

The bottom of the device body 13 is provided with a bottom end cap 17 in which the first return spring 154 is mounted.

The piston frame 151 is cross-shaped, two reset rods 153 are arranged on the left side and the right side of the piston frame, the top of the piston frame is connected with the movable piece 14, and the bottom of the piston frame is connected with the piston 152; suction syringe 11 is fitted into device body 13, and needle portion 110 of the syringe protrudes downward from the device body.

The bottom end of the guide rod 12 is provided with a stopper 18 through which the needle portion 110 of the needle cylinder passes downward. The locating part has the guard action to needle portion, and in addition, when needle portion extraction sample or jet-out sample, the locating part supports and presses the top at the test tube or the top of transition platform 21, so, on the locating part, perhaps, can set up pressure sensor between locating part and the guide arm, pressure sensor is connected with the controller, and Z axial telecontrol equipment in the three-dimensional moving system can be controlled to the controller. When the limiting part is pressed against the top end of the test tube or the top of the transition table 21, the pressure sensor senses that the Z-axis moving device stops acting.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The structure of a sample feeding system comprises a three-dimensional motion system, an acquisition device (10) arranged on the three-dimensional motion system and a transition device (20) arranged beside a carrier, wherein the acquisition device comprises a suction type needle cylinder (11); the method is characterized in that: the transition device comprises a transition table (21), the transition table is provided with a sample containing cavity (22) and a cleaning cavity (23), the cleaning cavity is connected with a cleaning agent supply device (30) through a cleaning pipeline, and the sample containing cavity can be communicated with a liquid storage device (40).

2. The structure of the sample injection system of claim 1, wherein: the acquisition device (10) comprises a device body (13) fixed on a guide rod (12), a movable piece (14) movably matched on the guide rod, and a piston assembly connected with the movable piece, wherein the guide rod is installed on a three-dimensional motion system, the piston assembly comprises a piston frame (151), a piston (152) installed on the piston frame and matched with the suction type needle cylinder (11), a reset rod (153) installed on the piston frame, and a first reset spring (154) abutted against the reset rod, the reset rod is movably inserted into the device body, and the first reset spring is arranged at the bottom of the device body; the movable member is connected with a power element (16).

3. The structure of the sample injection system of claim 2, wherein: the bottom of the device body (13) is provided with a bottom end cover (17), and the first return spring (154) is installed in the bottom end cover.

4. The structure of the sample injection system of claim 2, wherein: the piston frame (151) is in a cross shape, the two reset rods (153) are arranged on the left side and the right side of the piston frame, the top of the piston frame is connected with the movable piece (14), and the bottom of the piston frame is connected with the piston (152); a suction type cylinder (11) is fitted in the device body (13), and a needle part (110) of the cylinder protrudes downward from the device body.

5. The structure of the sample injection system of claim 4, wherein: the bottom end of the guide rod (12) is provided with a limiting piece (18), and the needle part (110) of the needle cylinder penetrates through the limiting piece downwards.