CN212120039U

CN212120039U - Anti-pollution gun head

Info

Publication number: CN212120039U
Application number: CN202020060625.8U
Authority: CN
Inventors: 汤夏安; 邓业成; 何光勇; 郭婷婷
Original assignee: Guangxi Normal University
Current assignee: Guangxi Normal University
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-12-11
Anticipated expiration: 2030-01-13

Abstract

The utility model relates to an anti-pollution rifle head, including the rifle head body this internal being equipped with of rifle head prevents this internal liquid refluence of rifle head or the anti-pollution mechanism of pollution pipetting gun that upwards splashes. The utility model has the advantages that: prevent to pollute liquid-transfering gun because liquid refluence or upwards splash when imbibition speed is too fast, liquid-transfering gun is put horizontally and liquid-transfering gun drops.

Description

Anti-pollution gun head

Technical Field

The utility model relates to a test equipment field, concretely relates to anti-pollution rifle head.

Background

The pipette tip is a matching device of the pipette, and is the basis for the pipette to complete the basic functions. The use of pipette tips for the transfer of liquids and even small amounts of solids in aseptic operations is routine during aseptic operations. Although various regulations for the standard operation of the pipette have been issued and implemented to prevent contamination during operation, some factors such as fatigue inevitably cause irregular operations such as excessively fast pipette speed, horizontal placement of the pipette, and dropping of the pipette during practical experiments. When the situations occur, the liquid-transferring gun contacts with the transferred liquid to cause pollution to the liquid-transferring gun, and the liquid-transferring gun is not suitable for high-temperature and high-pressure sterilization operation, so that the disinfection of the liquid-transferring gun once the liquid-transferring gun is polluted is a complicated process, and a large amount of time and energy of experimenters are required to be occupied. Therefore, the gun head for preventing liquid from flowing backwards or splashing upwards to pollute the pipette has high practical significance.

At present, the invention of a pollution-proof gun head is not limited. Such as:

the Chinese patent publication No. CN201361552Y discloses an anti-pollution pipette tip, wherein a bending section is added on a tube body of the pipette tip, so that the upper and lower parts of the pipette tip are not on the same vertical line to prevent pollution. However, the chinese patent publication No. CN201361552Y changes the structure of the pipette tip, and therefore, the processing of the pipette tip can be completed by changing the processing mold.

Chinese patent publication No. CN205340841U discloses an anti-pollution pipette tip, which adds a back-suction prevention conical opening plug at the upper end of the pipette tip to block liquid by using the acute angle plug wall of the downward-protruding back-suction prevention plug to prevent back suction. Chinese patent publication No. CN208032607U discloses a pipette tip with a built-in anti-reverse suction flap, which prevents liquid from flowing backwards to prevent contamination by two anti-reverse suction flaps perpendicular to the liquid flow direction. Although the two Chinese patent publications CN205340841U and CN208032607U have a certain anti-suck back effect, the liquid still can be polluted by the fact that the anti-suck back device is in direct contact with the pipette.

The Chinese patent publication number is: CN203971972U discloses an anti-pollution pipette tip, which is anti-pollution by adding a cylindrical small cover with holes on the upper end of the pipette tip. However, the chinese patent publication No. CN203971972U has two disadvantages: one small cover is not easy to clean and can not be replaced, so that the gun head can not be recycled for sterilization; the small cover of the gun is protruded upwards to suddenly suck excessive liquid, and the excessive liquid is accumulated on the cover, namely the excessive liquid is contacted with the gun to pollute the gun.

SUMMERY OF THE UTILITY MODEL

In summary, in order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing an anti-pollution gun head.

The utility model provides an above-mentioned technical problem's technical scheme as follows: an anti-pollution gun head comprises a gun head body, wherein an anti-pollution mechanism for preventing liquid in the gun head body from flowing backwards or splashing upwards to pollute a pipette is arranged in the gun head body.

The utility model has the advantages that: prevent to pollute liquid-transfering gun because liquid refluence or upwards splash when imbibition speed is too fast, liquid-transfering gun is put horizontally and liquid-transfering gun drops.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

further, the anti-pollution mechanism comprises a first interlayer and a second interlayer which block liquid in the gun head body from flowing backwards or splashing upwards; the first interlayer is of a round table-shaped hollow structure with an opening upper end and a large upper part and a small lower part and is fixed on the inner wall of the upper part of the gun head body;

the second interlayer is of a cylindrical or truncated cone-shaped hollow structure with a large upper part and a small lower part, the upper end of the second interlayer is fixed at the lower end of the first interlayer and is communicated with the interior of the first interlayer, the lower end of the second interlayer is arranged in a closed manner, and a gap is reserved between the second interlayer and the inner wall of the gun head body; and a lower air hole which enables negative pressure to be formed in the gun head body through a liquid transferring gun so as to adsorb liquid is formed in the side wall of the second interlayer.

The beneficial effect of adopting the further scheme is that: the first interlayer and the second interlayer are arranged, so that liquid can be prevented from flowing backwards or splashing upwards to pollute the pipette on the premise of not influencing the liquid suction.

Further, the lower air holes penetrate through the side wall of the second interlayer, and the lower air holes are arranged obliquely upwards in the direction from the inner side to the outer side of the second interlayer.

The beneficial effect of adopting the further scheme is that: the lower air hole can not only ventilate and suck liquid, but also isolate the liquid flow.

Further, the anti-pollution mechanism also comprises a liquid blocking plate for blocking liquid in the second interlayer from flowing backwards or splashing upwards to pollute the pipette; the liquid blocking plate is fixed at an upper end opening of the first interlayer.

The beneficial effect of adopting the further scheme is that: the first interlayer and the second interlayer are the second protection, namely, even if liquid enters the first interlayer and the second interlayer and is under the action of the liquid blocking plate, the liquid can be prevented from flowing backwards or splashing upwards to pollute the liquid transfer gun.

Further, an upper air hole for communicating the first interlayer with the interior of the gun head body is formed in the outer edge of the liquid blocking plate.

The beneficial effect of adopting the further scheme is that: ensuring normal air intake to suck liquid.

Drawings

Fig. 1 is a front view of a first embodiment of the present invention;

FIG. 2 is an enlarged view A of FIG. 1;

fig. 3 is a front view of a second embodiment of the present invention;

fig. 4 is an enlarged view B of fig. 3.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the gun head comprises a gun head body, 2, a first interlayer, 3, a second interlayer, 4, a lower air hole, 5, a liquid blocking plate, 6 and an upper air hole.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example one

As shown in fig. 1, the anti-pollution gun head comprises a gun head body 1, wherein an anti-pollution mechanism for preventing liquid in the gun head body 1 from flowing backwards or splashing upwards to pollute the pipette is arranged in the gun head body 1. As shown in fig. 2, the anti-pollution mechanism comprises a first interlayer 2 and a second interlayer 3 which block the liquid in the lance head body 1 from flowing backwards or splashing upwards. The first interlayer 2 is of a round table-shaped hollow structure with an open upper end and a large upper part and a small lower part, and is fixed on the inner wall of the upper part of the gun head body 1. The second interlayer 3 is a cylindrical or truncated cone-shaped hollow structure with a large upper part and a small lower part, the upper end of the second interlayer is fixed at the lower end of the first interlayer 2 and is communicated with the interior of the first interlayer 2, the lower end of the second interlayer is arranged in a closed manner, and a gap is reserved between the second interlayer 3 and the inner wall of the gun head body 1. And the side wall of the second interlayer 3 is provided with a lower air hole 4 which enables negative pressure to be formed in the gun head body 1 through a liquid transfer gun so as to adsorb liquid, the lower air hole 4 penetrates through the side wall of the second interlayer 3, and the lower air hole 4 is obliquely arranged upwards in the direction from the inner side to the outer side of the second interlayer 3. The anti-pollution mechanism further comprises a liquid blocking plate 5 for blocking liquid in the second interlayer 3 from flowing backwards or splashing upwards to pollute the pipette. The liquid blocking plate 5 is fixed at an upper end opening of the first interlayer 2, and an upper air hole 6 which is used for communicating the first interlayer 2 and the interior of the gun head body 1 up and down is formed in the outer edge of the liquid blocking plate.

After the gun head body 1 is installed on a liquid-transfering gun, negative pressure is formed in the gun head body 1 under the action of the liquid-transfering gun through the upper air hole 6 and the lower air hole 4, and then liquid enters the gun head body 1 to suck the gun head body 1. When liquid in the gun head body 1 accidentally happens, such as the liquid suction speed is too fast, the liquid-transfering gun is horizontally arranged, the liquid-transfering gun drops, and the like, the liquid-transfering gun can be prevented from flowing backwards or splashing upwards to pollute the liquid-transfering gun under the action of the anti-pollution mechanism, and the following description is respectively given:

liquid backflow prevention: when the pipette is horizontally arranged or the position of the pipette is abnormal, the liquid in the pipette head body 1 flows back towards the direction of the pipette. When liquid refluences, it can not continue to flow backwards and contact with the liquid-transfering gun outside rifle head body 1 under first interlayer 2 and the 3 blocks of second interlayer: the liquids have a certain cohesion with each other, and the lower air holes 4 are designed as fine holes with small radial sizes and are obliquely arranged, so that the liquids cannot normally pass through the lower air holes 4 and enter the second partition layer 3. Even if liquid can pass through the lower air hole 4 to enter the second interlayer 3 when the liquid is more, and a buffer chamber formed inside the first interlayer 2 and the second interlayer 3 can store certain liquid under the action of the liquid blocking plate 5, the upper air hole 6 and the lower air hole 4 are designed into fine holes with smaller radial sizes, and the liquid cannot pass through the upper air hole 6 under the influence of mutual cohesion and then is stored in the buffer chamber formed inside the first interlayer 2 and the second interlayer 3. The anti-pollution mechanism has the double effects of preventing liquid from flowing backwards, reliably preventing the liquid from flowing backwards and effectively preventing the liquid from flowing backwards to pollute the pipette.

Preventing liquid from splashing: when the pipette accidentally happens such as the imbibition speed is too fast or the pipette drops, the liquid in the gun head body 1 can splash towards the pipette, the splashed liquid can not continuously splash out of the gun head body 1 and contact with the pipette under the blocking of the first interlayer 2 and the second interlayer 3, the outer side walls of the first interlayer 2 and the second interlayer 3 are conical, the lower air hole 4 is designed into a small pore with a small radial size and is obliquely arranged, the splashed liquid gathered on the outer side walls of the first interlayer 2 and the second interlayer 3 can rapidly fall down, and more liquid gathered on the outer side walls of the first interlayer 2 and the second interlayer 3 can be prevented from entering the buffer chambers formed inside the first interlayer 2 and the second interlayer 3 through the lower air hole 4. Similarly, even if more liquid collects on the outer side walls of the first barrier layer 2 and the second barrier layer 3, the liquid entering the buffer chamber through the lower air hole 4 will be stored in the buffer chamber. Therefore, the anti-pollution mechanism also has the double effects of preventing liquid from splashing, reliably preventing the liquid from splashing and effectively preventing the liquid from splashing to pollute the pipette.

Example two

As shown in fig. 3 and 4, the second partition layer 3 is designed into a cylindrical hollow structure, and other parts are consistent with the embodiment, so that the liquid in the gun head body 1 can be prevented from flowing backwards or splashing upwards to pollute the pipette, and the principle is consistent with the embodiment.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-pollution gun head comprises a gun head body (1), and is characterized in that an anti-pollution mechanism for preventing liquid in the gun head body (1) from flowing backwards or splashing upwards to pollute a pipette is arranged in the gun head body (1);

the anti-pollution mechanism comprises a first interlayer (2) and a second interlayer (3) which block liquid in the gun head body (1) from flowing backwards or splashing upwards; the first interlayer (2) is of a truncated cone-shaped hollow structure with an open upper end and a large upper part and a small lower part, and is fixed on the inner wall of the upper part of the gun head body (1);

the second interlayer (3) is of a cylindrical or truncated cone-shaped hollow structure with a large upper part and a small lower part, the upper end of the second interlayer is fixed at the lower end of the first interlayer (2) and is communicated with the interior of the first interlayer (2), the lower end of the second interlayer is closed, and a gap is reserved between the second interlayer (3) and the inner wall of the gun head body (1); and a lower air hole (4) which enables the gun head body (1) to form negative pressure through a liquid transferring gun so as to adsorb liquid is arranged on the side wall of the second interlayer (3).

2. The anti-fouling lance head according to claim 1, wherein the lower air holes (4) extend through a side wall of the second barrier layer (3), and the lower air holes (4) are arranged obliquely upwards in a direction from inside to outside the second barrier layer (3).

3. The anti-pollution gun head according to claim 1 or 2, wherein the anti-pollution mechanism further comprises a liquid blocking plate (5) for blocking the liquid in the second barrier layer (3) from flowing backwards or splashing upwards to pollute the pipette; the liquid blocking plate (5) is fixed at an upper end opening of the first interlayer (2).

4. An anti-pollution lance head according to claim 3, wherein an upper air hole (6) communicating the first partition (2) with the interior of the lance head body (1) is provided at the outer edge of the liquid barrier (5).