CN215029030U

CN215029030U - Liquid transfer device for experiments

Info

Publication number: CN215029030U
Application number: CN202120775055.5U
Authority: CN
Inventors: 武婧; 吴研; 蔡佳洁; 刘家碧; 董洪成; 朱文涛; 沈昊翀; 李怡
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-12-07
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a liquid-transfering device for experiments, including pipette, pipette's rear end has bobbin and one end and the communicating breather pipe in external world through three-way pipe joint intercommunication, is equipped with the pneumatic valve on the breather pipe, is equipped with the piston rod in the bobbin, is equipped with the rubber ring of laminating mutually with the inner wall of bobbin on the front end of piston rod, and the rear end stretches out the bobbin and is equipped with an annular pull handle. The utility model provides a how can carry out the technical problem who takes of moving of liquid conveniently and accurately, have convenient to use, extract efficient, low in labor strength and advantage such as accuracy height.

Description

Liquid transfer device for experiments

Technical Field

The utility model belongs to the technical field of experimental device technique and specifically relates to indicate a liquid-transfering device for experiments.

Background

During the course of the experiment, it is often necessary to remove a corresponding amount of liquid formulation. In the prior art, the liquid is moved by using a pipette, and obviously, the following defects exist: firstly, the liquid is extracted by repeatedly squeezing and placing the aurilaves, so that the labor intensity is high, the extraction efficiency is low, and the phenomenon that the liquid is sprayed into the aurilaves due to too large squeezing force is easy to occur, so that the liquid is inconvenient to use and short in service life; the second is that the fine adjustment of the amount of displacement is performed by the operator controlling the tightness between the index finger of the right hand and the nozzle of the pipette, which results in low accuracy of the amount of displacement.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is how to conveniently and accurately move the liquid agent.

For solving the technical problem, the utility model provides a liquid-transfering device for experiments, including pipette, pipette's rear end has bobbin and one end and the communicating breather pipe in external world through three-way pipe joint intercommunication, be equipped with the pneumatic valve on the breather pipe, be equipped with the piston rod in the bobbin, be equipped with on the front end of piston rod with the rubber ring that the inner wall of bobbin laminated mutually, and the rear end stretches out the bobbin is equipped with an annular pull handle.

In one embodiment of the invention, the rearward end of the barrel is inwardly encircled by a resilient flange that engages the piston rod.

In an embodiment of the present invention, the end of the vent pipe communicating with the outside is detachably connected to an annular seat, and the annular seat is provided with a filter screen.

In an embodiment of the present invention, the annular seat is connected with an end of the vent pipe, which is in communication with the outside.

In an embodiment of the present invention, the filter screen is concave in a sphere.

In one embodiment of the present invention, the filter screen is made of stainless steel material.

In one embodiment of the present invention, the annular pull handle is covered with an anti-slip rubber pad.

In one embodiment of the present invention, the sidewall of the tube barrel is provided with a pair of symmetrically arranged clamping seats protruding radially outward.

In one embodiment of the invention, the tube is made of a transparent material.

In one embodiment of the present invention, the pipette is a double layer structure.

Compared with the prior art, the technical scheme of the utility model have following advantage:

1. the liquid is extracted by adopting the needle cylinder type piston structure, so that the labor intensity is reduced, and the convenience and the extraction efficiency of use are improved.

2. The liquid volume in the pipette can be accurately controlled by operating the air valve through the structure that the air valve is arranged on the air pipe with one end communicated with the outside and the other end communicated with the pipette, so that the accuracy of the volume to be moved is effectively improved.

Drawings

In order to make the content of the invention more clearly understood, the invention will now be described in further detail with reference to specific embodiments thereof, in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of the present invention;

The specification reference numbers indicate: 1. the pipette comprises a pipette, 2, a tee pipe joint, 3, a pipe barrel, 4, a vent pipe, 5, an air valve, 6, a piston rod, 7, a rubber ring, 8 and an annular pull handle.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1, the liquid transfer device for experiments comprises a pipette 1, wherein the rear end of the pipette 1 is communicated with a tube barrel 3 and a vent tube 4 with one end communicated with the outside through a tee tube connector 2, the vent tube 4 is provided with an air valve 5, the tube barrel 3 is internally provided with a piston rod 6, the front end of the piston rod 6 is provided with a rubber ring 7 attached to the inner wall of the tube barrel 3, and the rear end of the piston rod extends out of the tube barrel 3 and is provided with an annular pull handle 8. Through this kind of structure, under the cooperation of syringe formula piston structure and pneumatic valve 5 for this liquid-transfering device has realized conveniently and accurately carrying out the technological effect that the liquid was got of transferring.

In a preferred embodiment of the present invention, the rear end of the barrel 3 is inwardly surrounded by an elastic flange which is engaged with the piston rod 6, so that the barrel 3 can be effectively prevented from slipping down without applying force, thereby improving the safety of use.

In a preferred embodiment of the present invention, the end of the vent pipe 4 communicating with the outside is connected with an annular seat through a screw, and the annular seat is provided with a filter screen, so that dust can be effectively prevented from entering the liquid agent to cause liquid agent pollution.

In a preferred embodiment of the present invention, the filter screen is concave in the shape of a sphere and made of stainless steel, which effectively prolongs the service life of the filter screen.

In a preferred embodiment of the present invention, the annular pull handle 8 is covered with a rubber mat to prevent slipping, so that the user can operate the piston rod 6 conveniently.

In a preferred embodiment of the present invention, a pair of symmetrically disposed holders are provided on the sidewall of the barrel 3 in a radially outwardly protruding manner, so that the user can hold the pipetting device.

In a preferred embodiment of the invention, the barrel 3 is made of a transparent material, so that the arrangement is convenient for the user to observe the position of the piston rod 6.

In a preferred embodiment of the present invention, the pipette 1 is of a double-layered construction, so that the temperature effect on the liquid formulation is reduced.

The working principle is as follows: when in use, the valve on the vent pipe 4 is closed, then the front end of the pipette 1 is extended downwards and vertically into a container for containing the liquid to be extracted, the user then grips the barrel 3 with one hand, pulls the piston rod 6 with the other hand in a direction away from the pipette 1, in this process, the liquid in the container is sucked into the pipette 1, and when the amount of the liquid sucked in reaches the graduation mark of the required amount of the liquid to be removed and is higher than the graduation mark of the required amount of the liquid to be removed, the air valve 5 is opened, the air valve 5 is closed when the liquid level of the liquid agent in the pipette 1 is lowered to the graduation line of the required displacement, then, the liquid transfer device is moved to bring the tip of the pipette 1 into contact with the side wall of the receiving container in an inclined downward direction, the user pushes the piston rod 6 to move in a direction approaching the pipette 1, the liquid agent flows from the pipette 1 into the receiving container, and the liquid agent is transferred to the receiving container and then the liquid agent is removed from the liquid transfer device.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims

1. The liquid transfer device for the experiment is characterized by comprising a pipette, wherein the rear end of the pipette is communicated with a pipe barrel and a vent pipe with one end communicated with the outside through a three-way pipe joint, the vent pipe is provided with an air valve, the pipe barrel is internally provided with a piston rod, the front end of the piston rod is provided with a rubber ring which is attached to the inner wall of the pipe barrel, and the rear end of the piston rod extends out of the pipe barrel and is provided with an annular pull handle.

2. Pipetting device for experiments according to claim 1, characterised in that the rear end of the barrel is inwardly annularly provided with a resilient flange which abuts the piston rod.

3. A liquid transfer device for experiments according to claim 1, wherein one end of the vent pipe which is communicated with the outside is detachably connected with an annular seat, and a filter screen is arranged on the annular seat.

4. The laboratory pipetting device of claim 3, wherein the annular seat is threadedly connected to an end of the vent tube communicating with the outside.

5. Pipetting device for experiments according to claim 3, characterised in that the sieve is spherically concave.

6. Pipetting device for experiments according to claim 3, characterised in that the sieve is made of stainless steel material.

7. The laboratory pipetting device of claim 1, wherein the ring-shaped pull handle is coated with a non-slip rubber mat.

8. The laboratory pipetting device according to claim 1, wherein the side wall of the barrel is provided with a pair of symmetrically arranged holders projecting radially outwards.

9. Pipette device for experiments according to claim 1, characterised in that the barrel is made of a transparent material.

10. Pipette device for experiments according to claim 1, characterised in that the pipette is of double-layer construction.