CN209254791U - A kind of drug detection liquid quantitative pipettor - Google Patents

Abstract

The utility model discloses a kind of drug detection liquid quantitative pipettors, it is related to liquid shifting equipment technical field, it includes graduated cylinder, piston is connected in graduated cylinder, and the upper surface of piston is fixedly connected with threaded rod, the top of threaded rod passes through the thread barrel that is fixedly connected of cover board inner wall upper surface and is fixedly connected with the lower surface of knob, and cover board is threaded in the outer surface of graduated cylinder, and the outer surface of support rod and threaded rod is socketed with the same spring.Drug detection liquid quantitative pipettor; pass through setting graduated cylinder, piston, support rod, threaded rod, cover board, thread barrel, knob, the first pipette, conduit, connecting tube, pipette, the second pipette, the first check valve, the first graduated scale, the second graduated scale, handle, the first neonychium and the second neonychium; to make researcher that the drug of different depth in container can be drawn onto pipette by turning knob, quantitative extraction is carried out so as to the drug to different depth in container.

Description

A kind of drug detection liquid quantitative pipettor

Technical field

The utility model relates to liquid shifting equipment technical field, specially a kind of drug detection liquid quantitative pipettor.

Background technique

Pipettor generally pipettes a small amount of or micro liquid using pipettor in the research in terms of carrying out analysis test. Pipettor can be divided into gas piston formula pipettor and external piston type pipettor according to principle.Gas piston formula pipettor is mainly used In standard liquid relief, external piston type pipettor is mainly for the treatment of the special liquids such as volatile, perishable and sticky.

During medical drugs manufacture, researcher needs to be sampled detection to the drug in preparation process, with Whether the effective component for observing drug is up to standard, and container is generally bigger when drug manufactures, and existing pipettor compares Progress liquid relief is extracted on the small surface layer that may only carry out, and liquid relief cannot be carried out among container and bottom, prevent researcher is from right Drug carries out layered weighting, to influence the result of drug detection.

Utility model content

(1) the technical issues of solving

In view of the deficiencies of the prior art, the utility model provides a kind of drug detection liquid quantitative pipettor, solves Existing pipettor is smaller may only to carry out surface layer and extracts to carry out liquid relief, cannot carry out liquid relief among container and bottom, Prevent researcher to drug carry out layered weighting, to influence drug testing result problem.

(2) technical solution

To achieve the above objectives, the technical scheme adopted by the utility model is that: a kind of drug detection liquid quantitative liquid relief Device, including graduated cylinder are connected with piston in the graduated cylinder, and the upper surface of piston is fixedly connected with threaded rod, the spiral shell The top of rasp bar passes through the thread barrel that cover board inner wall upper surface is fixedly connected and is fixedly connected with the lower surface of knob, and cover board spiral shell Line is connected to the outer surface of graduated cylinder, and the outer surface of the support rod and threaded rod is socketed with the same spring, and spring is upper Lower both ends are fixedly connected with the upper surface of the upper surface of cover board inner wall and piston respectively.

The lower surface of the graduated cylinder is connected with the top of the first pipette, and the bottom end of the first pipette passes through conduit It is connected with the top of connecting tube, the bottom end of the connecting tube is connected with the upper surface of pipette.

The bottom end of the pipette is provided with the second pipette, and the top of the second pipette passes through the following table of pipette Face simultaneously extends in pipette, is provided with the first check valve in second pipette, and the upper surface of the first check valve with The upper surface of second pipette is in the same plane, and the bottom end of second pipette is connected with the top of drain pipe, and And second one-way valve is provided in drain pipe.

Preferably, the graduated cylinder is made of transparent plastic, and the outer surface of graduated cylinder is provided with the first graduated scale.

Preferably, the pipette is made of transparent plastic material, and the outer surface of pipette is provided with the second scale Ruler.

Preferably, the left side of the pipette is provided with handle, and the outer surface of handle is fixedly connected with the first guarantor Protection pad, and the outer surface of the first neonychium is provided with anti-skid chequer.

Preferably, the outer surface of the knob is fixedly connected with the second neonychium, and the outer surface of the second neonychium is set It is equipped with anti-skid chequer.

Preferably, first check valve is identical with second one-way valve model, and the first check valve and second one-way valve Installation direction is opposite.

(3) beneficial effect

The utility model has the beneficial effects that:

1, drug detection liquid quantitative pipettor, by the way that graduated cylinder, piston, support rod, threaded rod, cover board, spiral shell is arranged Line cylinder, knob, the first pipette, conduit, connecting tube, pipette, the second pipette, the first check valve, the first graduated scale, second Graduated scale, handle, the first neonychium and the second neonychium, when need in container drug carry out layered weighting when It waits, since pipette is connected by conduit with graduated cylinder, moves freely pipette, while the outer surface of pipette is provided with Second graduation apparatus, so that researcher is observed that the second pipette slips into the depth below medical fluid, other graduated cylinder outer surface It is provided with the first graduated scale, researcher is made to be observed that the capacity for drawing medical fluid, so that researcher be made to pass through rotation rotation The drug of different depth in container can be drawn onto pipette by button, be determined so as to the drug to different depth in container Amount extracts.

2, drug detection liquid quantitative pipettor is layered by setting drain pipe and second one-way valve when to medical fluid After sampling, researcher reversely turns knob, makes that piston moves downward, and piston moves downward makes to generate positive pressure in graduated cylinder, thus Medical fluid in pipette is squeezed out into pipette by second one-way valve and drain pipe, so that researcher be facilitated to be moved to medical fluid In corresponding test container.

3, drug detection liquid quantitative pipettor, by the way that spring is arranged, so that researcher is rotating counterclockwise rotation When button, since the elastic force of spring can avoid grinding to one downward power of piston to slow down the speed that piston moves up Study carefully personnel and turn the excessive medical fluid of the too fast attraction of knob, so that medical fluid be avoided to generate waste.

Detailed description of the invention

Fig. 1 is the schematic diagram of the section structure that the utility model is faced；

Fig. 2 is the structural schematic diagram that the utility model is faced；

Fig. 3 is the enlarged structure schematic diagram at the utility model A1；

Fig. 4 is the enlarged structure schematic diagram at the utility model A2.

In figure: 1 graduated cylinder, 2 pistons, 3 support rods, 4 threaded rods, 5 cover boards, 6 thread barrels, 7 knobs, 8 springs, 9 first imbibitions Pipe, 10 conduits, 11 connecting tubes, 12 pipettes, 13 second pipette, 14 first check valves, 15 drain pipes, 16 second one-way valves, 17 first graduated scales, 18 second graduated scales, 19 handles, 20 first neonychiums, 21 second neonychiums.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figs 1-4, the utility model provides a kind of technical solution: a kind of drug detection liquid quantitative pipettor, Including graduated cylinder 1, graduated cylinder 1 is made of transparent plastic, and the outer surface of graduated cylinder 1 is provided with the first graduated scale 17, passes through setting the One graduated scale 17, so that researcher is observed that the mobile distance of piston 2, so as to be pushed away according to 2 moving distance of piston The capacity of 12 interior suction priming liquid of pipette is calculated, is connected with piston 2 in graduated cylinder 1, and the upper surface of piston 2 is fixedly connected There is threaded rod 4, by the way that threaded rod 4 is arranged, allowing researcher by threaded rod 4, slowly band piston 2 is moved, thus Researcher is facilitated to grasp the uptake of medical fluid, the top of threaded rod 4 passes through the thread barrel that 5 inner wall upper surface of cover board is fixedly connected 6 are fixedly connected with the lower surface of knob 7, and the outer surface of knob 7 is fixedly connected with the second neonychium 21, and the second neonychium 21 Outer surface be provided with anti-skid chequer, by be arranged the second neonychium 21, due to the outer surface of the second neonychium 21 be provided with it is anti-skidding Line, so that researcher is more convenient to turn knob 7, and cover board 5 is threaded in the outer surface of graduated cylinder 1, support rod 3 and screw thread The outer surface of bar 4 is socketed with the same spring 8, and the upper and lower ends of spring 8 respectively with the upper surface of 5 inner wall of cover board and piston 2 upper surface is fixedly connected, by the way that spring 8 is arranged, so that researcher is when rotating counterclockwise knob 7, due to spring 8 Elastic force researcher can be avoided to turn knob 7 to slow down the speed that piston 2 moves up to 2 one downward power of piston It is too fast to attract excessive medical fluid, so that medical fluid be avoided to generate waste.

The lower surface of graduated cylinder 1 is connected with the top of the first pipette 9, and the bottom end of the first pipette 9 passes through conduit 10 are connected with the top of connecting tube 11, and the bottom end of connecting tube 11 is connected with the upper surface of pipette 12, and pipette 12 is Bright plastic material is made, and the outer surface of pipette 12 is provided with the second graduated scale 18, by the way that the second graduated scale 18 is arranged, makes The mobile dynamic medical fluid liquid level distance below of the second pipette 13 can be observed according to the second graduated scale 18 by obtaining researcher, thus Researcher is facilitated to carry out stratified sampling.

The bottom end of pipette 12 is provided with the second pipette 13, and the top of the second pipette 13 passes through pipette 12 Lower surface simultaneously extends in pipette 12, and the left side of pipette 12 is provided with handle 19, by the way that handle 19 is arranged, so that research Personnel can hold pipette 12 by handle 19, to facilitate researcher that pipette 12 is protruded into the container that drug is held It is interior, and the outer surface of handle 19 is fixedly connected with the first neonychium 20, and the outer surface of the first neonychium 20 be provided with it is anti- Line is slided, is provided with the first check valve 14 in the second pipette 13, by the way that the first check valve 14 is arranged, so that the sample in pipette 12 Product will not be spread out when moving out liquid level to be come, to complete the quantitative sampling of medical fluid, and the upper table of the first check valve 14 Face and the upper surface of the second pipette 13 are in the same plane, and the bottom end of the second pipette 13 is connected with the top of drain pipe 15 It is logical, and second one-way valve 16 is provided in drain pipe 15, by the way that second one-way valve 16 is arranged, so that 2 amount of moving downward of piston Positive pressure is generated in cylinder 1, so that the medical fluid in pipette 12 is squeezed out into pipette 12 by second one-way valve 16 and drain pipe 15, from And facilitate researcher that medical fluid is moved in corresponding test container, 16 model phase of the first check valve 14 and second one-way valve Together, and the first check valve 14 is opposite with 16 installation direction of second one-way valve.

The operating procedure of the utility model are as follows:

S1, when need in container drug carry out layered weighting when, researcher first pass through conduit 10 will First pipette 9 is connected with connecting tube 11, then holds handle 19 and protrudes into pipette 12 in the container that drug is held, so After watch the second graduated scale 18, so that the second pipette 13 is moved to the designated position below medical fluid；

S2, then researcher grasps graduated cylinder 1, turns knob 7 counterclockwise with hand, while observing 2 lower surface of piston Position on locating first graduation mark, knob 7 turns counterclockwise drives threaded rod 4 to rotate counterclockwise, and threaded rod 4 rotates counterclockwise While band piston 2 move upwards, piston 2, which moves upwards, to be made to generate negative pressure in graduated cylinder 1, and pipette 12 is connected with graduated cylinder 1 Logical, so that medical fluid is drawn onto pipette 12, when 2 lower surface of piston is located at required extraction medical fluid capacity, researcher stops twisting Dynamic knob 7；

S3, after to medical fluid Stratified Sampling, researcher holds the vertical removing pharmaceutical producs of pipette 12 to by handle 19 Container, then move to above corresponding test container, then researcher reversely turns knob 7, transports piston 2 downwards Dynamic, piston 2, which moves downward, to be made to generate positive pressure in graduated cylinder 1, so that the medical fluid in pipette 12 is passed through second one-way valve 16 and row Liquid pipe 15 squeezes out pipette 12.

Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, It should be included within the scope of protection of this utility model.

Claims (6)

1. a kind of drug detection liquid quantitative pipettor, including graduated cylinder (1), it is characterised in that: activity connects in the graduated cylinder (1) It is connected to piston (2), and the upper surface of piston (2) is fixedly connected with threaded rod (4), the top of the threaded rod (4) passes through lid The thread barrel (6) that plate (5) inner wall upper surface is fixedly connected is fixedly connected with the lower surface of knob (7), and cover board (5) screw thread connects Connecing the outer surface in graduated cylinder (1), the outer surface of the support rod (3) and threaded rod (4) is socketed with the same spring (8), and The upper and lower ends of spring (8) are fixedly connected with the upper surface of the upper surface of cover board (5) inner wall and piston (2) respectively；

The lower surface of the graduated cylinder (1) is connected with the top of the first pipette (9), and the bottom end of the first pipette (9) is logical It crosses conduit (10) to be connected with the top of connecting tube (11), the bottom end of the connecting tube (11) and the upper surface phase of pipette (12) Connection；

The bottom end of the pipette (12) is provided with the second pipette (13), and the top of the second pipette (13) passes through liquid relief It manages the lower surface of (12) and extends in pipette (12), be provided with the first check valve (14) in second pipette (13), And the upper surface of the first check valve (14) and the upper surface of the second pipette (13) are in the same plane, second imbibition The bottom end of pipe (13) is connected with the top of drain pipe (15), and is provided with second one-way valve (16) in drain pipe (15).

2. a kind of drug detection liquid quantitative pipettor according to claim 1, it is characterised in that: the graduated cylinder (1) It is made of transparent plastic, and the outer surface of graduated cylinder (1) is provided with the first graduated scale (17).

3. a kind of drug detection liquid quantitative pipettor according to claim 1, it is characterised in that: the pipette (12) it is made of transparent plastic material, and the outer surface of pipette (12) is provided with the second graduated scale (18).

4. a kind of drug detection liquid quantitative pipettor according to claim 1, it is characterised in that: the pipette (12) left side is provided with handle (19), and the outer surface of handle (19) is fixedly connected with the first neonychium (20), and The outer surface of first neonychium (20) is provided with anti-skid chequer.

5. a kind of drug detection liquid quantitative pipettor according to claim 1, it is characterised in that: the knob (7) Outer surface be fixedly connected with the second neonychium (21), and the outer surface of the second neonychium (21) is provided with anti-skid chequer.

6. a kind of drug detection liquid quantitative pipettor according to claim 1, it is characterised in that: described first is unidirectional Valve (14) is identical with second one-way valve (16) model, and the first check valve (14) and second one-way valve (16) installation direction phase Instead.