CN110201731A - A kind of dropper - Google Patents

Abstract

The invention relates to the field of experimental instruments, and discloses a dropper, which includes a suction pipe and a core rod. There is a dripping port, the upper end of the straight barrel is provided with an injection port, the core rod includes a push rod and a piston which are sequentially connected from top to bottom, and the piston is dynamically sealed with the inner wall of the straight barrel. The beneficial effect of the invention is that it can realize the dripping of the organic matter with high viscosity and avoid the organic matter sticking to the inner wall of the dropper.

Description

a dropper

technical field

The invention relates to the field of experimental instruments, in particular to a dropper.

Background technique

It is difficult for some organic substances with high viscosity to be directly added to the solvent at room temperature, and it is difficult to dissolve quickly. The method of stirring while adding dropwise can speed up the dissolution. For example, polyoxyethylene sorbitan monooleate, referred to as Tween-80, becomes a jelly at low temperature, and it is difficult to dissolve quickly after mixing with water at room temperature. When dripping with a dropper, Tween-80 partly sticks to the wall of the dropper, making it difficult to control the amount of dripping, and the needle of the syringe is too small to absorb and drop Tween-80. At present, the main method is to put block-shaped Tween-80 directly into water and stir it with a magnetic stirrer to speed up the dissolution of Tween-80 in water, but the magnetic stirrer is expensive and some laboratories do not have it.

Contents of the invention

The technical problem to be solved by the present invention is: the existing experimental instruments, including droppers and syringes, are difficult to realize the dropwise addition of organic substances with high viscosity.

The solution that the present invention solves its technical problem is:

A dropper, comprising a suction tube and a core rod, the suction tube includes a straight part connected sequentially from top to bottom, and a tapered transition part, the lower end of the transition part is provided with a dripping port, the straight part The upper end is provided with an injection port, and the core rod includes a push rod and a piston connected in sequence from top to bottom, and the piston is dynamically sealed with the inner wall of the straight cylinder.

Optionally, the outer wall of the suction pipe is provided with a vertically arranged slide rail, and a connecting bar is slidably connected to the slide rail, and the upper part of the connecting bar is provided with a hollow groove opening outward, and also includes a nut And vertically set the screw rod, the screw rod is screwed with the nut, the outside of the nut is arranged in the hollow groove, the upper end of the screw rod is connected with the upper end of the push rod, and a loose buckle is also included , the live buckle is hinged to the straight barrel, and the live buckle is fastened to the connecting strip.

Further, the nut is provided with several main scale marks, the main scale marks are arranged in a circular array centered on the axis of the nut, and the connecting bar is provided with sub-scale marks.

Optionally, a push plate is fixed on the top of the push rod, and the threaded rod abuts against the lower side of the push plate.

Optionally, the material of the suction pipe is glass, the material of the connecting bar, the nut, the screw rod, the snap button, and the push rod are all plastic, and several protrusions are arranged on the outer surface of the connecting bar.

Optionally, a rubber anti-skid layer is provided on the hinge, and the rubber anti-skid layer abuts against the outer surface of the connecting strip.

In some embodiments, the piston is detachably connected to the injection port.

In some embodiments, scales are provided on the straight barrel.

The beneficial effect of the invention is that it can realize the dripping of organic matter with high viscosity and avoid the organic matter from sticking to the inner wall of the dropper.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings that need to be used in the description of the embodiments. Apparently, the described drawings are only some embodiments of the present invention, not all embodiments, and those skilled in the art can obtain other designs and drawings based on these drawings without creative work.

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

Fig. 2 is a sectional view of the present invention;

Fig. 3 is the top view of nut of the present invention;

Fig. 4 is a top view of the connection bar of the present invention.

Detailed ways

The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflicting with each other.

Fig. 1 to Fig. 4 are embodiments of the present invention, specifically:

A dropper, comprising a suction tube and a core rod, the suction tube includes a straight tube portion 11 sequentially connected from top to bottom, a tapered transition portion 12, the lower end of the transition portion 12 is provided with a dripping port, the The upper end of the straight barrel 11 is provided with an injection port, and the core rod includes a push rod 21 and a piston 22 connected in sequence from top to bottom, and the piston 22 is dynamically sealed with the inner wall of the straight barrel 11 .

The structure of the present application combines the advantages of the dropper and the syringe. The core rod is used to absorb and push the high-viscosity organic matter, which is relatively easy to absorb. When pushing, the piston 22 can push the organic matter on the inner wall of the straight cylinder 11 to avoid organic matter hanging on the straight cylinder. On the inner wall of part 11. A certain weight can be loaded on the top of the push rod 21 to realize automatic dripping, eliminating the need for manual operation. For example, a weight is placed on the top of the push rod 21. When the weight of the weight is appropriate, the push rod 21 can be slowly lowered pressure.

Further, a vertically arranged slide rail 13 is provided on the outer wall of the suction pipe, and a connecting bar 31 is slidably connected to the slide rail 13, and the upper part of the connecting bar 31 is provided with an empty groove opening outward, Also comprise nut 32 and vertically set screw mandrel 33, described screw mandrel 33 is screwed with described nut 32, and the outside of described nut 32 is arranged in the described hollow groove, and the upper end of described screw mandrel 33 and described pushing The upper ends of the rods 21 are connected together, and further include a snap button 34 hinged to the straight barrel portion 11 , and snapped to the connecting bar 31 .

During use, the loose buckle 34 is fastened and connected with the connecting bar 31, and the nut 32 is rotated. Due to the restriction of the empty groove and the connecting bar 31, the position of the nut 32 in the up and down direction remains unchanged, and the screw mandrel 33 drives the push rod 21 to move up and down. Because the nut 32 rotates once a week, the displacement of the screw mandrel 33 is certain, so the volume of suction or dripping is also certain. With this structure, quantitative suction or dripping can be realized, only need to calculate the number of cycles that the nut 32 rotates, without Reading and estimation are carried out on the straight part 11 to improve the accuracy of suction and dripping. When needs dripping, the nut 32 can be rotated under the condition that the loose buckle 34 is fastened to the connecting strip 31, or the screw mandrel 33 or the push rod 21 Force is applied from above to press the screw mandrel 33 and the push rod 21 downward, and at the same time, the connecting bar 31 also slides downward along the slide rail.

Optionally, the nut 32 is provided with several main scale marks 320 , and the main scale marks 320 are arranged in a circular array centered on the axis of the nut 32 , and the connecting bar 31 is provided with sub-scale marks 310 . According to the relative positions of the main scale mark 320 and the sub-scale mark 310, the number and angle of rotation of the nut 32 can be easily judged, combined with the amount of medicine absorbed by the nut 32 for one rotation, the actual amount of medicine absorbed can be accurately calculated.

A push plate 23 is fixed on the top of the push rod 21 , and the threaded rod 33 abuts against the lower side of the push plate 23 . When screw mandrel 33 moves upwards, push plate 23 is jacked up, drives push rod 21 to move upwards, exerts pressure on push plate 23, push rod 21 and screw mandrel 33 are all pressed down. This structure is a structure that simply realizes quantitative suction. If quantitative dripping is also to be realized, the push plate 23 and the screw rod 33 can be rotatably connected.

Optionally, the material of the suction pipe is glass, the material of the connecting bar 31, the nut 32, the screw mandrel 33, the snap button 34, and the push rod 21 are all plastics, and the outer surface of the connecting bar 31 is provided with Several bumps. The cost of making connecting strip 31, nut 32, screw mandrel 33, push rod 21 with plastics is relatively low, and when snapping, the frictional force between the connecting strip 31 of plastics and the loose buckle 34 is bigger, fastens easily.

Optionally, a rubber anti-skid layer is provided on the hinge 34 , and the rubber anti-skid layer abuts against the outer surface of the connecting strip 31 . This structure can further increase the frictional force between the connecting strip 31 and the loose buckle 34 .

In some embodiments, the piston 22 is detachably connected to the injection port. Liquid can be added to the suction tube from the filling port.

In some embodiments, a scale is provided on the straight barrel portion 11 . Easy to read.

The preferred embodiments of the present invention have been described in detail above, but the invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent modifications or replacements without violating the spirit of the present invention. These equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (8)

1. A dropper, characterized in that: it comprises a suction tube and a core rod, and the suction tube comprises a straight tube portion (11) connected successively from top to bottom, a tapered transition portion (12), and the transition portion The lower end of (12) is provided with dripping mouth, and the upper end of described straight tube part (11) is provided with injection port, and described core rod comprises push rod (21) and piston (22) that are connected successively from top to bottom, and described The piston (22) is dynamically sealed with the inner wall of the straight cylinder portion (11). 2. A kind of dropper according to claim 1, characterized in that: a vertically arranged slide rail (13) is provided on the outer wall of the suction pipe, and a connecting link is slidably connected in the slide rail (13). Bar (31), the top of described connecting bar (31) is provided with the hollow groove of opening outwards, also comprises nut (32) and vertically sets screw mandrel (33), and described screw mandrel (33) and described nut (32) screw connection, the outside of the nut (32) is arranged in the hollow groove, the upper end of the screw rod (33) is connected with the upper end of the push rod (21), and a snap button (34) is also included. , the movable button (34) is hinged to the straight barrel portion (11), and the movable button (34) is fastened to the connecting strip (31). 3. A kind of dropper according to claim 2, characterized in that: the nut (32) is provided with several main scale marks (320), and the main scale mark (320) is connected with the nut (32) The axis of the axis is set in a central circular array, and the connecting bar (31) is provided with a secondary scale mark (310). 4. A dropper according to claim 2, characterized in that: the top of the push rod (21) is fixed with a push plate (23), and the screw rod (33) and the push plate (23) ) under the abutment. 5. A dropper according to claim 2, characterized in that: the suction pipe is made of glass, and the connecting strip (31), nut (32), screw rod (33), snap button (34) ), the material of the push rod (21) is plastics, and the outer surface of the connecting strip (31) is provided with some protrusions. 6. A dropper according to claim 2, characterized in that: the slip button (34) is provided with a rubber anti-slip layer, and the rubber anti-slip layer abuts against the outer surface of the connecting strip (31) . 7. The dropper according to claim 1, characterized in that: the piston (22) is detachably connected to the injection port. 8. The dropper according to claim 1, characterized in that: a scale is provided on the straight tube portion (11).