CN215353517U

CN215353517U - Liquid transfer gun head for sucking viscous liquid

Info

Publication number: CN215353517U
Application number: CN202120985124.5U
Authority: CN
Inventors: 吴昊
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-12-31
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a pipette tip for sucking viscous liquid, which comprises a tip body, wherein a suction port of the tip body adopts a large-caliber blunt port, the lower end of the tip body is a pot-shaped part, the outer wall of the tip body is connected with a 'guy' -shaped convex scale mark parallel to the upper end of a connecting part, the inner wall of the tip body is provided with an anti-adsorption layer formed by spraying inorganic nano-particles, and the tip body is made of an environment-friendly material. The utility model adopts the large-caliber blunt port as the suction part contacted with the liquid, and can effectively reduce the pressure when sucking the viscous liquid; the scale marks can help the user to intuitively obtain the information of the absorbed liquid; the anti-adsorption layer on the inner wall of the gun head body can effectively reduce liquid residues, so that the volume of the ejected liquid is more accurate; the application of the environment-friendly material reduces the pollution caused by the plastic gun head.

Description

Liquid transfer gun head for sucking viscous liquid

Technical Field

The utility model relates to the technical field of experimental tools, in particular to a pipette tip for sucking viscous liquid.

Background

The liquid-transfering gun is a liquid-transfering equipment commonly used in biological or chemical field, and the general gun head matched with the liquid-transfering gun can well implement the goal of sucking non-viscous liquid. However, when viscous liquid is sucked, the phenomenon that the liquid is difficult to suck due to large resistance and the liquid is adhered to the wall of the gun head can occur in the common gun head because the caliber of the gun head is small, so that the operation is inconvenient, the volume of the liquid to be moved is inaccurate, and the experiment is influenced.

In order to solve the problem of difficulty in sucking liquid, a common treatment mode in a laboratory is to manually cut off a gun head to enlarge the caliber. However, the fracture of the gun head is not flat due to manual shearing, and the gun head may crack due to uneven stress. Meanwhile, the shortened gun head cannot correspond to the maximum range of the pipette gun, and liquid is easily sucked into the gun. Although the method for obtaining the relationship between the absorbed liquid and the lost volume by adopting manual experiment correction can accurately measure the volume of the actually discharged liquid, the actual operation is very troublesome, reagent waste can be caused, and the obtained relationship cannot be completely applicable to a pipette which is not used for a long time and different pipettes and brings errors inevitably.

In prior art, absorb the section with the rifle head and set up to the round platform form, and the diameter of suction port end is greater than the diameter of the other end, increases the area of contact when absorbing viscous liquid, when loosening pipettor push down the switch, treats that the viscous liquid that absorbs passes through the flow increase of suction port, has avoided because viscous liquid blocks up on the suction port for viscous liquid can be relatively during from the leisurely being absorbed to the rifle head. However, in actual operation, because the diameter of the suction end is larger than that of the other end, liquid sucked into the liquid storage section of the gun head is easy to drop automatically after the piston reaches a set scale, and the phenomenon is particularly obvious when a small amount of liquid is sucked.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pipette tip which is simple and convenient to use and can accurately suck viscous liquid.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a liquid-transfering gun rifle head for absorbing viscous liquid, includes the rifle head body, and the suction inlet of rifle head body adopts the diameter to be 5-7 mm's blunt mouthful as the front end of heavy-calibre, and rifle head body lower extreme is close to suction inlet department and is the outstanding pot form portion of outside inflation, rifle head body outer wall connection has the scale mark parallel with rifle head body connecting portion upper end, and the absorption layer is prevented that rifle head body inner wall connection special material made, and rifle head body material is environmental protection material.

Further, the upper end of the gun head body is a connecting part connected with the liquid-transfering gun, and the lower end of the gun head body is a suction part contacted with liquid. The connecting part is in threaded connection or inserted connection with the pipette.

Further, the specification of the gun head body is 1 mL.

Further, the inner diameter of the connecting portion was 8 mm.

Furthermore, the pot-shaped part is provided with a hollow column, and the hollow column is connected with the pot-shaped part by at least two connecting rods.

Furthermore, the scale marks are convex lines on the outer wall.

Furthermore, the scale mark is of a 'caray' type.

Furthermore, the anti-adsorption layer is formed by spraying inorganic nano particles, and the inorganic nano particles can be selected from nano silicon dioxide, nano titanium dioxide, nano zinc oxide or nano ferrite.

Further, the particle size of the inorganic nano particles of the adsorption prevention layer is 45-90 mm.

Further, the environment-friendly material is ethylene-vinyl acetate copolymer.

The utility model has the beneficial effects that:

the large-caliber blunt port is used as the front end, so that the problems of large resistance and difficulty in suction when viscous liquid is sucked are solved, the large caliber is provided, and the phenomenon that liquid is easy to drip because a suction port at the lower end is larger than that at the upper end is avoided. The hollow column can divide the liquid into an inner part and an outer part, so that the diameters of the pipe orifices of the three parts are consistent as much as possible, the local resistance loss of the pipe from a large caliber to a small caliber is reduced, and the liquid is easier to absorb. Meanwhile, the inner wall of the gun head body is coated with an anti-adsorption layer consisting of inorganic nano particles, so that viscous liquid adsorbed on the inner wall of the gun head body after being blown by the pipette can be effectively reduced. The outer wall of the gun head body is provided with scale marks, so that an operator can visually see the volume of the absorbed liquid, the problem that the volume of the liquid measured by the quality of the liquid transferring gun is inaccurate can be effectively avoided, and experimental errors are reduced. In addition, the gun head body can be made of environment-friendly materials, so that the environmental pollution caused by the plastic gun head is reduced. The gun head is simple and convenient in structure, can be produced in batch, is suitable for absorbing viscous liquid, and can well meet the requirements of operators.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

fig. 2 is a schematic overall structure view of another view angle in embodiment 1 of the present invention;

FIG. 3 is a schematic view showing the overall structure of embodiment 2 and embodiment 3 of the present invention;

fig. 4 is an overall structural diagram of another viewing angle in embodiment 2 and embodiment 3 of the present invention.

In the figure: 1-connecting portion, 2-rifle head body, 3-scale mark, 4-pot form portion, 5-anti-adsorption layer, 6-suction inlet, 7-connecting rod, 8-cavity post.

Detailed Description

The utility model will be described in further detail below with reference to the drawings in an embodiment of the utility model.

Example 1

The utility model provides a liquid-transfering gun rifle head for absorbing viscous liquid, includes rifle head body 2, and the suction inlet 6 of rifle head body 2 adopts the diameter to be 5-7 mm's blunt mouthful, and 2 lower extremes of rifle head body are close to suction inlet department and are the outstanding pot portion 4 of outside inflation, and 2 outer wall connections of rifle head body have scale mark 3, and the inner wall connection has prevents adsorbed layer 5.

Furthermore, according to the pipette head for sucking viscous liquid, the scale lines 3 are "guiy" shaped convex lines, and the scale lines 3 are sprayed, engraved or hot-pressed on the outer wall of the pipette head body.

Further, in the pipette head for absorbing the viscous liquid, the adsorption prevention layer 5 is formed by spraying inorganic nanoparticles.

Further, in the pipette tip for absorbing the viscous liquid, the inorganic nanoparticles are nano silicon dioxide, nano titanium dioxide, nano zinc oxide or nano ferrite, and the particle size is 45-90 nm.

Further, according to the pipette tip for sucking the viscous liquid, the tip body 2 is made of an environment-friendly material.

Further, according to the pipette tip for sucking the viscous liquid, the environment-friendly material is made of ethylene-vinyl acetate copolymer.

Example 2

Example 2 a pipette tip for aspirating viscous liquids according to the utility model is further defined on the basis of example 1.

The pipette head for sucking the viscous liquid further comprises a hollow column 8 and a connecting rod 7, the hollow column 8 with two open ends is connected in the middle of the pot-shaped part 4, and the connecting rod 7 connects the hollow column 8 with the pot-shaped part 4.

Example 3

The connecting part 1 is a hollow cylinder with the inner diameter of 8mm and is matched with the muzzle of a conventional liquid-transfering gun. The specification of the gun head body 2 is 1mL, the gun head body is made of an environment-friendly material ethylene-vinyl acetate copolymer, and the gun head body can be directly made through a mould in actual production. The scale mark 3 is "guy" type, is the projecting line on rifle head body 2 outer wall, and the volume of helping the user to see the absorption solution directly perceivedly. The middle of the scale mark 3 is penetrated by a straight line and is divided into a long line and a short line. The long line is one third of the inner diameter of the gun head body, the short line is one sixth of the inner diameter of the gun head body, and the long lines and the short lines are alternately arranged. The long line at the lowest end indicates 100uL, the difference in volume of solution between adjacent long lines is 100uL, the lowest end of the connecting part 1 is 1000uL, the short line is located between two long lines, and the difference in volume of solution between adjacent long and short lines is 50 uL. The suction port 6 adopts a blunt port with a large caliber, which can reduce the resistance when sucking liquid, the caliber is 5-7mm, the pot-shaped part 4 not only provides the suction port with a larger caliber, but also avoids the phenomenon that the liquid is easy to drip because the diameter of the lower port is larger than that of the upper end. The inner wall of the gun head body 2 is connected with an anti-adsorption layer 5, so that the adsorption of viscous liquid on the inner wall of the gun head body 2 can be effectively reduced, the accuracy of the volume of the blown liquid is improved, the anti-adsorption layer 5 is formed by spraying inorganic nano particles, and the optional inorganic nano particles comprise nano silicon dioxide, nano titanium dioxide, nano zinc oxide, nano ferrite, and the particle size of the sprayed inorganic nano particles is 45-90 mm. The hollow column 8 and the connecting rod 7 are sprayed with anti-adsorption layers on the inner wall and the outer wall.

Claims

1. The utility model provides a liquid-transfering gun rifle head for drawing viscous liquid, includes rifle head body, its characterized in that: the suction port of the gun head body adopts a large-caliber blunt port with the diameter of 5-7mm, the lower end of the gun head body close to the suction port is a pot-shaped part which expands outwards and protrudes, the outer wall of the gun head body is connected with scale marks, and the inner wall of the gun head body is connected with an anti-adsorption layer.

2. A pipette tip for aspirating viscous liquids according to claim 1, characterized in that: the kettle-shaped part is connected with the hollow column with two open ends in the middle, and the connecting rod connects the hollow column with the kettle-shaped part.

3. A pipette tip for aspirating viscous liquids according to claim 1, characterized in that: the scale lines are 'guiy' -shaped convex lines, and the scale lines are sprayed, carved or hot-pressed on the outer wall of the gun head body.

4. A pipette tip for aspirating viscous liquids according to claim 1, characterized in that: the adsorption-resistant layer is formed by spraying inorganic nano particles.

5. A pipette tip for aspirating viscous liquids according to claim 4, characterized in that: the inorganic nano-particles are nano-silicon dioxide, nano-titanium dioxide, nano-zinc oxide or nano-ferrite, and the particle size is 45-90 nm.

6. A pipette tip for aspirating viscous liquids according to claim 1, characterized in that: the gun head body is made of environment-friendly materials.

7. A pipette tip for aspirating viscous liquids according to claim 6, characterized in that: the environment-friendly material is made of ethylene-vinyl acetate copolymer.