CN216678280U

CN216678280U - Liquid sampling device

Info

Publication number: CN216678280U
Application number: CN202120935275.XU
Authority: CN
Inventors: 曾炟; 汤体; 刘媛; 黄晖辉; 曾琼芳
Original assignee: Changsha Wormer Technology Co ltd
Current assignee: Changsha Wormer Technology Co ltd
Priority date: 2021-05-05
Filing date: 2021-05-05
Publication date: 2022-06-07
Anticipated expiration: 2031-05-05

Abstract

The utility model provides a liquid sample introduction device, which comprises an injector, wherein the injector comprises a needle tube, the interior of the needle tube is slidably connected with a piston, the injector is detachably connected with one side of a first push-pull mechanism, one side of the first push-pull mechanism is fixedly connected with one side of a second push-pull mechanism, a sample can be extracted from a sample bottle by the device and then transferred to other places or injected into a sample inlet of an analytical instrument, and a precise encoder is used for controlling when the piston of the injector moves, so that the liquid absorption and injection precision is precisely controlled, and the injector is convenient to install and dismantle.

Description

Liquid sampling device

Technical Field

The utility model relates to the technical field of experimental equipment, in particular to a liquid sampling device.

Background

At present, a liquid sample injector in the market generally adopts a motor to drive a motor screw rod to move through a gear, so that the movement of an injector is controlled, the whole precision is not high due to the large installation clearance of the gear, the gear is difficult to machine, and the installation is inconvenient.

In addition, the conventional liquid sampler needs to maintain the injector after being used for a period of time, so that the injector needs to be disassembled and assembled, and the common injector is assembled through threads or screws, so that the assembly and disassembly of the injector are troublesome, a large amount of time is consumed during operation, and the accuracy is not high during manual operation because the outer surface of the injector does not have directional data such as scales.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquid sample introduction device aiming at the problems that the liquid sample introduction device can accurately control the liquid suction and injection precision and is convenient to mount and dismount an injector and the like.

In order to achieve the purpose, the utility model provides the following technical scheme: a liquid sample introduction device comprises an injector, wherein the injector comprises a needle tube, the interior of the needle tube is connected with a piston in a sliding manner, the injector is detachably connected to one side of a first push-pull mechanism, and one side of the first push-pull mechanism is fixedly connected to one side of a second push-pull mechanism;

the second push-pull mechanism comprises a fixed seat, the upper end of the fixed seat is fixedly connected with a second motor, the output end of the second motor is coaxially connected to the upper end of a second lead screw, the lower end of the second lead screw is rotatably connected to the lower end of the fixed seat, the middle part of the fixed seat is slidably connected to one side of a second sliding block, the middle part of the second sliding block is in threaded connection with the middle part of the second lead screw, and the other side of the second sliding block is fixedly connected to one side of the first push-pull mechanism;

the middle part of the fixed seat is fixedly connected with a second slide rail, and the middle part of the second slide rail is connected to one side of the second slide block in a sliding manner;

the first push-pull mechanism comprises a push seat, the upper end of the push seat is fixedly connected with a first motor, the output end of the first motor is coaxially connected to the upper end of a first screw rod, the lower end of the first screw rod is rotatably connected to the lower end of the push seat, the middle of the push seat is slidably connected to one side of a first sliding block, and the middle of the first sliding block is in threaded connection with the middle of the first screw rod;

the middle part of the pushing seat is fixedly connected with a first sliding rail, the middle part of the first sliding rail is connected to one side of the first sliding block in a sliding manner, a needle cylinder fixing groove is formed in one side of the lower end of the pushing seat, and the needle cylinder fixing groove is detachably connected to the upper end of the needle tube;

an encoder is arranged at the upper end of the first motor;

a piston fixing groove is formed in one end of the first sliding block, and the piston fixing groove is internally detachably connected to the upper end of the piston

Compared with the prior art, the utility model has the beneficial effects that:

the device can draw out the sample from the sample bottle, shifts to other places or pours into analytical instrument's introduction port into again, has accurate encoder to control when the syringe piston motion to the precision of accurate control liquid absorption and injection, and make things convenient for installing in the dismantlement of syringe.

Drawings

FIG. 1 is a schematic diagram A of the external structure of the present invention;

FIG. 2 is a front view of the external structure of the present invention;

FIG. 3 is a side view of the external structure of the present invention;

fig. 4 is a schematic view B of the external structure of the present invention.

In the figure: 1. an injector; 11. a needle tube; 12. a piston; 2. a first push-pull mechanism; 21. a pushing seat; 211. a first slide rail; 212. a needle cylinder fixing groove; 22. a first motor; 221. an encoder; 23. a first lead screw; 24. a first slider; 241. a piston fixing groove; 3. a second push-pull mechanism; 31. a fixed seat; 311. a second slide rail; 32. a second motor; 33. a second screw rod; 34. and a second slider.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the utility model.

In an embodiment, please refer to fig. 1-4 again, a liquid sample injection apparatus includes an injector 1, the injector 1 includes a syringe 11, a piston 12 is slidably connected inside the syringe 11, the injector 1 is detachably connected to one side of a first push-pull mechanism 2, and one side of the first push-pull mechanism 2 is fixedly connected to one side of a second push-pull mechanism 3;

the second push-pull mechanism 3 comprises a fixed seat 31, the upper end of the fixed seat 31 is fixedly connected with a second motor 32, the output end of the second motor 32 is coaxially connected to the upper end of a second screw rod 33, the lower end of the second screw rod 33 is rotatably connected to the lower end of the fixed seat 31, the middle part of the fixed seat 31 is slidably connected to one side of a second slide block 34, the middle part of the second slide block 34 is in threaded connection with the middle part of the second screw rod 33, the other side of the second slide block 34 is fixedly connected to one side of the first push-pull mechanism 2, the second screw rod 33 is driven to rotate by the second motor 32, and the second screw rod 33 controls the up-down movement of the second slide block 34 through threaded fit;

the middle of the fixed seat 31 is fixedly connected with a second slide rail 311, the middle of the second slide rail 311 is slidably connected to one side of the second slider 34, and the design is to make the second slider 34 slide up and down along the direction of the second slide rail 311;

the first push-pull mechanism 2 comprises a push seat 21, the upper end of the push seat 21 is fixedly connected with a first motor 22, the output end of the first motor 22 is coaxially connected to the upper end of a first screw rod 23, the lower end of the first screw rod 23 is rotatably connected to the lower end of the push seat 21, the middle part of the push seat 21 is slidably connected to one side of a first sliding block 24, the middle part of the first sliding block 24 is in threaded connection with the middle part of the first screw rod 23, the first motor 22 drives the first screw rod 23 to rotate, and the first screw rod 23 controls the up-and-down movement of the first sliding block 24 through threaded fit;

the middle part of the pushing seat 21 is fixedly connected with a first sliding rail 211, the middle part of the first sliding rail 211 is slidably connected to one side of the first sliding block 24, one side of the lower end of the pushing seat 21 is provided with a syringe fixing groove 212, the syringe fixing groove 212 is detachably connected to the upper end of the needle tube 11, the first sliding block 24 can slide up and down in the direction of the first sliding rail 211 through the design, and the needle tube 11 can be easily installed, fixed and detached through the syringe fixing groove 212;

the upper end of the first motor 22 is provided with an encoder 221, and the design can be precisely controlled when the encoder controls the movement of the injector piston, so that the liquid suction and injection precision can be precisely controlled;

a piston fixing groove 241 is formed at one end of the first slider 24, and the piston fixing groove 241 is detachably connected to the upper end of the piston 12, so that the piston 12 can be easily installed, fixed and detached through the piston fixing groove 241.

The operation principle is as follows: firstly, a needle tube 11 of an injector 1 is installed in a needle tube fixing groove 212 of a pushing seat 21, the upper end of a piston 12 is installed in a piston fixing groove 241, a second motor 32 drives a second screw rod 33 to rotate after equipment is started, the second screw rod 33 controls the second sliding block 34 to move up and down through thread matching, the needle tube 11 moves up and down along with the needle tube, a first motor 22 is accurately controlled under the action of an encoder 221 to drive a first screw rod 23 to rotate, the first screw rod 23 controls the first sliding block 24 to move up and down through thread matching, the piston 12 moves up and down along with the first screw rod, and the needle tube 11 is matched with the piston 12, so that liquid sampling is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a liquid sampling device, includes syringe (1), syringe (1) includes needle tubing (11), the inside sliding connection piston (12) of needle tubing (11), its characterized in that: the injector (1) is detachably connected to one side of the first push-pull mechanism (2), and one side of the first push-pull mechanism (2) is fixedly connected to one side of the second push-pull mechanism (3);

the second push-pull mechanism (3) comprises a fixed seat (31), the upper end of the fixed seat (31) is fixedly connected with a second motor (32), the output end of the second motor (32) is coaxially connected to the upper end of a second screw rod (33), the lower end of the second screw rod (33) is rotatably connected to the lower end of the fixed seat (31), the middle of the fixed seat (31) is slidably connected to one side of a second sliding block (34), the middle of the second sliding block (34) is in threaded connection with the middle of the second screw rod (33), and the other side of the second sliding block (34) is fixedly connected to one side of the first push-pull mechanism (2);

the middle part of the fixed seat (31) is fixedly connected with a second sliding rail (311), and the middle part of the second sliding rail (311) is connected to one side of the second sliding block (34) in a sliding manner;

the first push-pull mechanism (2) comprises a push seat (21), the upper end of the push seat (21) is fixedly connected with a first motor (22), the output end of the first motor (22) is coaxially connected to the upper end of a first screw rod (23), the lower end of the first screw rod (23) is rotatably connected to the lower end of the push seat (21), the middle of the push seat (21) is slidably connected to one side of a first sliding block (24), and the middle of the first sliding block (24) is in threaded connection with the middle of the first screw rod (23);

the middle part of the pushing seat (21) is fixedly connected with a first sliding rail (211), the middle part of the first sliding rail (211) is connected to one side of the first sliding block (24) in a sliding manner, a needle cylinder fixing groove (212) is formed in one side of the lower end of the pushing seat (21), and the needle cylinder fixing groove (212) is detachably connected to the upper end of the needle tube (11);

an encoder (221) is arranged at the upper end of the first motor (22);

a piston fixing groove (241) is formed in one end of the first sliding block (24), and the piston fixing groove (241) is detachably connected to the upper end of the piston (12).