CN213995928U

CN213995928U - Liquid-transfering gun

Info

Publication number: CN213995928U
Application number: CN202022781691.7U
Authority: CN
Inventors: 刘春杨; 宋媛媛
Original assignee: Tianjin Sheweisi Biotechnology Co ltd
Current assignee: Tianjin Sheweisi Biotechnology Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-08-20
Anticipated expiration: 2030-11-26

Abstract

The utility model provides a liquid-transfering gun, including the liquid-transfering gun body, at the liquid-transfering gun body, the liquid-transfering gun head, liquid-transfering gun body downside is connected with the connecting pipe, connecting pipe lower extreme opening part is connected with the liquid-transfering gun head, the liquid-transfering gun head upper end outside is the adapter sleeve, the inboard is the inner tube, the adapter sleeve cup joints in the inner tube outside, and the lower extreme connects the tip under the inner tube, the outside seal gasket that is equipped with of opening part circumference of inner tube, the inner tube stretches into in the connecting tube and through adapter sleeve and connecting pipe fixed connection together, seal gasket is buckled downwards and offsets with the connecting pipe inner wall. The utility model discloses beneficial effect: install the pipette head at the opening part of connecting pipe lower extreme, make adapter sleeve fixed connection on the connecting pipe outer wall, inside the inner tube stretched into the connecting pipe for seal gasket circumference downward sloping offsets with the connecting pipe inner wall, plays sealed effect, prevents to move the liquid completion back, and the remaining liquid of connecting pipe inner wall flows downwards, pollutes the external environment.

Description

Liquid-transfering gun

Technical Field

The utility model belongs to move the liquid equipment field, especially, relate to a liquid-transfering gun.

Background

Pipette guns are commonly used in laboratories as pipettors to remove small or minute amounts of liquid samples. However, the pipette head that present pipette most of adoption was pegged graft directly at pipette bottom link, perhaps passes through threaded connection lug connection at pipette bottom link, and these two kinds of connected modes all can have the problem that the liquid oozes and the not hard up problem of connection of pipette head, if remove the in-process or remove the back and place the period, have liquid to spill, then can make liquid extravagant, pollute external environment.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses aim at overcoming the shortcoming of the above-mentioned problem in the prior art, provide a liquid-transfering gun.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a pipette, includes the pipette body, pipette head, the inside liquid chamber that holds that is equipped with of pipette body, the top is equipped with presses the suction head, pipette body downside is connected with the connecting pipe, connecting pipe lower extreme opening part is connected with the pipette head, the upper end outside of pipette head is the adapter sleeve, and the inboard is the inner tube, the adapter sleeve cup joints in the inner tube outside, and the lower extreme is connected under the inner tube, the outside seal gasket that is equipped with of opening part circumference of inner tube, the inner tube stretches into in the connecting tube and is in the same place through adapter sleeve and connecting pipe fixed connection, seal gasket is buckled downwards and offsets with the connecting pipe inner wall.

Furthermore, an expansion part is arranged outwards in the circumferential direction in the middle of the connecting pipe.

Furthermore, a sealing gasket is arranged at the opening at the lower end of the connecting pipe.

Furthermore, the lower end of the connecting sleeve is provided with an external thread, the upper end of the connecting pipe is provided with an internal thread, and the connecting pipe and the connecting sleeve are fixedly connected together through a thread.

Furthermore, a filter layer is further arranged at the opening at the upper end of the inner pipe.

Furthermore, the inner wall of the connecting pipe is circumferentially and evenly provided with a plurality of limiting blocks at the upper side of the opening of the inner pipe.

Furthermore, the width of the sealing gasket is larger than the distance from the outer wall of the inner pipe to the inner wall of the connecting pipe.

Further, the lower end of the pipette tip is an outer tube connected with the inner tube, and an opening at the lower end of the outer tube is provided with an oblique opening.

Furthermore, the inner pipe, the outer pipe and the connecting sleeve are of an integrally formed structure.

Compared with the prior art, the utility model discloses following advantage has:

the pipette head of the pipette gun is arranged at the opening of the lower end of the connecting pipe, so that the connecting sleeve is fixedly connected to the outer wall of the connecting pipe, the inner pipe extends into the connecting pipe, a sealing gasket connected with the opening end of the upper end of the inner pipe is downwards inclined along the circumferential direction of the inner pipe and is abutted against the inner wall of the connecting pipe, the connection between the connecting pipe and the pipette head is sealed inside the connecting pipe, and residual liquid on the inner wall of the connecting pipe flows downwards to pollute the external environment after pipetting is prevented; after the liquid transfer gun head is installed, a sample is absorbed, the pressing suction head on the upper side of the liquid transfer gun body is pressed, the sample is absorbed through the liquid transfer gun head and enters the liquid storage cavity through the connecting pipe, and therefore liquid taking is convenient and operation is simple; the pipette tip is convenient to install, not easy to fall off from the connecting pipe, free of liquid leakage and safer.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a pipette according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

Description of reference numerals:

1-a pipette body; 2-pressing the suction head; 3-connecting pipe; 4-pipette tips; 41-inner tube; 42-connecting sleeves; 43-an outer tube; 5-a sealing gasket; 6-a filter layer; 7-a sealing gasket; and 8, a limiting block.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 and 2, a pipette, includes a pipette body 1, the pipette body 1, a pipette head 4, a liquid storage cavity is provided inside the pipette body 1, a pressing suction head 2 is provided at the top, a connection pipe 3 is connected to the lower side of the pipette body 1, the opening of the lower end of the connection pipe 3 is connected to the pipette head 4, a connection sleeve 42 is provided on the outer side of the upper end of the pipette head 4, an inner pipe 41 is provided on the inner side, the connection sleeve 42 is sleeved on the outer side of the inner pipe 41, the lower end of the connection sleeve is connected to the lower end of the inner pipe 41, a sealing gasket 7 is provided circumferentially and outwardly at the opening of the inner pipe 41, the inner pipe 41 extends into the connection pipe 3 and is fixedly connected to the connection pipe 3 through the connection sleeve 42, and the sealing gasket 7 is bent downwardly and abuts against the inner wall of the connection pipe 3. In this embodiment, the sealing gasket 7 is disposed along the opening circumference at the end of the inner tube 41 on the upper side of the pipette tip 4, and when the pipette tip 4 is mounted and the inner tube 41 is inserted into the connecting tube 3, the sealing gasket 7 is inclined due to the blocking deformation of the lower opening of the connecting tube 3 and abuts against the inner wall of the connecting tube 3, so as to seal the connection between the connecting tube 3 and the pipette tip 4 inside the connecting tube 3, and prevent the residual liquid on the inner wall of the connecting tube 3 from flowing downward to pollute the external environment after the pipetting is completed.

In this embodiment, the gasket 7 is made of rubber and is deformable.

The expansion part is arranged outwards in the middle of the connecting pipe 3 in the circumferential direction, when liquid suction force is large, liquid suction is fast, the liquid entering the liquid storage cavity is slow, redundant liquid can enter the expansion part for temporary storage, and the buffer space of the solution is increased.

A sealing gasket 5 is arranged at the lower end opening of the connecting pipe 3, when the inner pipe 41 of the pipette tip 4 extends from the lower end opening of the connecting pipe 3, a sealing mode is formed between the lower end opening of the connecting pipe 3 and the inner pipe 41, and liquid in the connecting pipe 3 is prevented from leaking into an area between the inner pipe 41 and the connecting sleeve 42.

The lower end of the connecting sleeve 42 is provided with an external thread, the upper end of the connecting pipe 3 is provided with an internal thread, and the connecting pipe 3 and the connecting sleeve 42 are fixedly connected together through a thread.

The opening at the upper end of the inner pipe 41 is also provided with a filter layer 6 for filtering impurities in the sucked liquid.

In this embodiment, the pipette tip 4 is made of polypropylene, when the inner tube 41 extends upwards into the connecting tube 3, the connecting sleeve 42 is screwed at the same time, and is connected to the lower end of the connecting tube 3 through a screw thread, if the pushing force for moving the inner tube 41 upwards is too large, that is, the pushing force acting on the outer tube 43 is too large, the inner tube 41 will continue to move upwards after the connecting sleeve 42 is installed in place, and finally the connecting sleeve 42 will deform. In order to prevent the phenomenon that the inner pipe 41 is deformed by the excessive thrust, a plurality of limiting blocks 8 are uniformly arranged on the inner wall of the connecting pipe 3 at the upper side of the opening of the inner pipe 41 in the circumferential direction, so that the inner pipe 41 is limited, and meanwhile, the residual liquid on the inner wall of the connecting pipe 3 is not prevented from flowing into the region formed by the sealing gasket 7 and the inner wall of the connecting pipe 3.

The width of the sealing gasket 7 is larger than the distance between the outer wall of the inner tube 41 and the inner wall of the connecting tube 3, so that the sealing gasket 7 is in a downward inclined state when entering the connecting tube 3.

The lower end of the pipette tip 4 is an outer tube 43 connected with the inner tube 41, and an opening at the lower end of the outer tube 43 is provided with an oblique opening, so that the pipette tip can suck liquid by adopting the oblique opening, and is more convenient to suck.

The inner pipe 41, the outer pipe 43 and the connecting sleeve 42 are of an integrally formed structure, and installation is convenient and fast.

The pipette tip 4 is transparent, so that the liquid suction condition and the liquid leakage condition at the opening at the lower end of the connecting pipe 3 can be observed conveniently at any time.

The working process of the embodiment is as follows:

install pipette head 4 at the opening part of connecting pipe 3 lower extreme, make adapter sleeve 42 fixed connection on the outer wall of connecting pipe 3, inner tube 41 stretches into inside and support at stopper 8 department of connecting pipe 3, seal gasket 7 that is connected with the open end of inner tube 41 along 41 circumference downward sloping of inner tube, and offset with the 3 inner walls of connecting pipe, connect inside 3 of connecting pipe to sealing the connection between connecting pipe 3 and the pipette head 4, prevent to move the liquid completion back, the remaining liquid of the 3 inner walls of connecting pipe flows downwards, pollute the external environment.

After the pipette head 4 is installed, imbibition is carried out on a sample, the pressing suction head 2 on the upper side of the pipette body 1 is pressed, the sample is sucked through the pipette head 4, and the sample enters the liquid storage cavity through the connecting pipe 3.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipette, characterized by: comprises a liquid-transfering gun body (1), a liquid-transfering gun head (4) and a liquid-transfering gun body (1), a liquid storage cavity is arranged in the pipette body (1), a pressing suction head (2) is arranged at the top of the pipette body, the lower side of the liquid-transfering gun body (1) is connected with a connecting pipe (3), the opening at the lower end of the connecting pipe (3) is connected with a liquid-transfering gun head (4), the outer side of the upper end of the liquid-transfering gun head (4) is provided with a connecting sleeve (42), the inner side is provided with an inner pipe (41), the connecting sleeve (42) is sleeved on the outer side of the inner pipe (41), the lower end of the inner tube (41) is connected with the lower end part of the inner tube, a sealing gasket (7) is arranged at the opening of the inner tube (41) outwards along the circumferential direction, the inner pipe (41) extends into the connecting pipe (3) and is fixedly connected with the connecting pipe (3) through a connecting sleeve (42), the sealing gasket (7) is bent downwards and is propped against the inner wall of the connecting pipe (3).

2. The pipette gun of claim 1, wherein: and an expansion part is arranged outwards in the circumferential direction in the middle of the connecting pipe (3).

3. The pipette gun of claim 1, wherein: and a sealing gasket (5) is arranged at the opening at the lower end of the connecting pipe (3).

4. The pipette gun of claim 1, wherein: the connecting sleeve is characterized in that an external thread is arranged at the lower end of the connecting sleeve (42), an internal thread is arranged at the upper end of the connecting pipe (3), and the connecting pipe (3) and the connecting sleeve (42) are fixedly connected together through the thread.

5. The pipette gun of claim 1, wherein: and a filter layer (6) is also arranged at the opening at the upper end of the inner pipe (41).

6. The pipette gun of claim 1, wherein: the inner wall of the connecting pipe (3) is positioned at the upper side of the opening of the inner pipe (41) and is circumferentially and uniformly provided with a plurality of limiting blocks (8).

7. The pipette gun of claim 1, wherein: the width of the sealing gasket (7) is larger than the distance between the outer wall of the inner pipe (41) and the inner wall of the connecting pipe (3).

8. The pipette gun of claim 1, wherein: the lower end of the pipette tip (4) is an outer tube (43) connected with the inner tube (41), and an opening at the lower end of the outer tube (43) is provided with an oblique opening.

9. The pipette gun of claim 8, wherein: the inner pipe (41), the outer pipe (43) and the connecting sleeve (42) are of an integrally formed structure.