CN201728123U

CN201728123U - Novel precision micro-burette

Info

Publication number: CN201728123U
Application number: CN2010202371501U
Authority: CN
Inventors: 刘怡卓; 王锦化; 张柳; 靳培培
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-17
Filing date: 2010-06-17
Publication date: 2011-02-02
Anticipated expiration: 2020-06-17

Abstract

The utility model relates to a novel precision micro-burette, which mainly comprises a graduated tube (1), a liquid feeding tube (2), an automatic zeroing sharp nozzle (3), a piston (6), a capillary sharp nozzle (8), a control valve (10) and a spherical funnel (11). The micro-burette is characterized in that the graduated tube (1) is parallel to the liquid feeding tube (2), the automatic zeroing sharp nozzle (3) is arranged at the top end of the graduated tube (1), a tee tube (5) is arranged at the lower end of the graduated tube (1), the lower end of the tee tube (5) is connected with the piston (6) by means of welding, a binding node (7) is welded at the lower end of the piston (6), and the capillary sharp nozzle (8) is sleeved at the lower end of the binding node (7). The right end of the tee tube (5) is connected with a bevel glass tube (9), the control valve (10) at the upper end of the bevel glass tube (9) is connected with the liquid feeding tube (2) by means of welding, and the spherical funnel (11) is welded at the upper end of the liquid feeding tube (2). The novel precision micro-burette realizes automatic zeroing for liquid feeding by the aid of the automatic zeroing sharp nozzle (3), and improves accuracy and precision titration by the aid of the capillary sharp nozzle (8).

Description

The novel precise microburet

Technical field

The utility model belongs to a kind of novel precise microburet of accurate measurement standard liquor capacity, and it is mainly used in the capacity analysis of medical detection, industrial and mining enterprises and R﹠D institution analytical test chamber, and the chemical analysis experiment of institution of higher learning.

Background technology

At present, the assay laboratory of institution of higher learning, medical detection department and industrial and mining enterprises, scientific research institution is still using classical 50mL acid buret in the mensuration of capacity analysis.Though the big volume burette of this classics is simple in structure, the chemical reagent consumption amount is big, and the discharging of waste liquid amount is many, the experimental cost height.

In recent years, more and more scholars has been carried out many very distinctive microminiaturized transformations at classical acid buret, make the research of capacity titration traceization obtain sizable progress:, to be the comparatively typical traceization mentality of designing of a class as liquid feeding, the titration double hose microburet of inventing for a small amount of titrimetry of using in the hospital preparation in Chinese patent 200520083270.X and 200820188698.4; Chinese patent 200820026864.0 is also with the research of constant buret traceization, and with the minimizing reagent dosage, but these achievements remain the shortcoming of fixing being difficult for; Chinese patent 200820008323.5 afterwards is transformed into more succinct needle tubing liquid feeding with microburet, has solved this problem, and has designed capillary point mouth and improved the degree of accuracy and the precision of titration.

More than research is that problems such as the classical buret waste of solution reagent, discharging of waste liquid amount are big have been made work highly significant, but these microburets still have following 5 problems to wait further solution in actual application:

1. complex structure, the cost of manufacture height in case damage, loses greatlyyer, and is unfavorable for being extensive use of;

2. liquid feeding repeatedly, operation is convenient inadequately;

3. easily produce bubble in liquid feeding and the titration, and more difficult emptying, this process is wasted a large amount of reagent;

4. artificially control zero point, accidentalia is more, has reduced precision;

5. the drop that oozes of bundle joint lower end point mouth place is bigger, brings bigger systematic error to mensuration.

Summary of the invention

In order to overcome the weak point of above-mentioned existing technology, but the utility model has designed the with low cost, easy to operate of a kind of extensive use, and precision and all suitable with the classical constant buret novel precise microburet of the degree of accuracy.

The purpose of this utility model can reach by following scheme: a kind of novel precise microburet, by graded tube, liquid-feeding tube, automatic zero-filling is put sharp mouth, barrel-shaped cup, three-way pipe, piston, Shu Jie, capillary point mouth, the oblique angle glass tube, control valve, spherical hopper and joint pin are formed, it is characterized in that: graded tube is parallel to liquid-feeding tube, the graded tube top has an automatic zero-filling to put sharp mouth, the graded tube upper end is welded with a barrel-shaped cup, there is a three-way pipe graded tube lower end, the lower end and the piston of three-way pipe join by welding manner, the piston lower end is welded with a Shu Jie, a capillary point of bundle joint lower end socket mouth; The right-hand member of three-way pipe and oblique angle glass tube join, the overcoat lower end of the upper end of oblique angle glass tube and control valve joins, the upper end of control valve overcoat and the lower end of liquid-feeding tube join with welding manner, the upper end of liquid-feeding tube is welded with a spherical hopper, and the liquid-feeding tube left side of spherical hopper lower end welds together by joint pin with the right side, upper end of barrel-shaped cup.

Advantage of the present utility model is:

1. cost is low, and is easy and simple to handle, but wide popularization and application is analyzed experiment in microtitration;

2. spherical hopper and control valve can be regulated and control the liquid volume added of graded tube as required, realize a repeatedly titration of liquid feeding;

3. the oblique angle glass tube has improved the deficiency that 90 ° of bend pipes are easy to generate bubble, and having avoided wastes reagent because of the exhaust bubble, and has saved the time;

4. control the zero point when automatic zero-filling is put sharp mouth and realized liquid feeding effectively automatically, and the accidental error of avoiding manual operation to bring has improved the precision of titration;

5. capillary point mouth has reduced the volume and the flow velocity of drop effectively, has further improved the degree of accuracy and the precision of titration.

Description of drawings

Fig. 1 is the stereogram of novel precise microburet.

Each label declaration is as follows among Fig. 1:

(1) graded tube, (2) liquid-feeding tube, (3) automatic zero-filling are put sharp mouth, (4) barrel-shaped cup, (5) three-way pipe, (6) piston, (7) Shu Jie, (8) capillary point mouth, (9) oblique angle glass tube, (10) control valve, (11) spherical hopper, (12) joint pin.

The specific embodiment

Graded tube 1 is parallel to liquid-feeding tube 2, graded tube 1 is an internal diameter 1-4mm, the scale glass tube of minimum division value 0.01mL, graded tube 1 top has an automatic zero-filling to put sharp mouth 3, it is that glass tube by graded tube 1 upper end fuses the back and draws and form that automatic zero-filling is put sharp mouth 3, the sharp mouth mouth internal diameter that automatic zero-filling is put sharp mouth 3 is 1-2mm, automatic zero-filling is put sharp mouth 3 and is 100-150 ° of angle with graded tube 1, graded tube 1 upper end is welded with a barrel-shaped cup 4, there is a three-way pipe 5 graded tube 1 lower end, the lower end of three-way pipe 5 and piston 6 join by welding manner, piston 6 lower ends are welded with a bundle joint 7, a capillary point of bundle joint 7 lower end sockets mouth 8, capillary point mouth 8 is drawn through hot melt by plastic flexible pipe and forms; The right-hand member of three-way pipe 5 and oblique angle glass tube 9 join, oblique angle glass tube 9 is glass tubes that and graded tube 1 are 45 ° of angles, the overcoat lower end of the upper end of oblique angle glass tube 9 and control valve 10 joins, the upper end of control valve 10 overcoats and the lower end of liquid-feeding tube 2 join with welding manner, the upper end of liquid-feeding tube 2 is welded with a spherical hopper 11, and the right side, upper end of liquid-feeding tube 2 left sides of spherical hopper 11 lower ends and barrel-shaped cup 4 welds together by joint pin 12.

Claims

1. novel precise microburet, by graded tube (1), liquid-feeding tube (2), automatic zero-filling is put sharp mouth (3), barrel-shaped cup (4), three-way pipe (5), piston (6), Shu Jie (7), capillary point mouth (8), oblique angle glass tube (9), control valve (10), spherical hopper (11) and joint pin (12) are formed, it is characterized in that: graded tube (1) is parallel to liquid-feeding tube (2), graded tube (1) top has an automatic zero-filling to put sharp mouth (3), graded tube (1) upper end is welded with a barrel-shaped cup (4), there is a three-way pipe (5) graded tube (1) lower end, the lower end of three-way pipe (5) and piston (6) join by welding manner, piston (6) lower end is welded with a Shu Jie (7), a capillary point of Shu Jie (7) lower end socket mouth (8); The right-hand member of three-way pipe (5) and oblique angle glass tube (9) join, the overcoat lower end of the upper end of oblique angle glass tube (9) and control valve (10) joins, the upper end of control valve (10) overcoat and the lower end of liquid-feeding tube (2) join with welding manner, the upper end of liquid-feeding tube (2) is welded with a spherical hopper (11), and liquid-feeding tube (2) left side of spherical hopper (11) lower end welds together by joint pin (12) with the right side, upper end of barrel-shaped cup (4).

2. novel precise microburet according to claim 1, it is characterized in that: it is to fuse the back drawing by the glass tube on the graded tube (1) to form that automatic zero-filling is put sharp mouth (3), the sharp mouth mouth internal diameter that automatic zero-filling is put sharp mouth (3) is 1-2mm, and automatic zero-filling is put sharp mouth (3) and is 100-150 ° of angle with graded tube (1).

3. novel precise microburet according to claim 1 is characterized in that: oblique angle glass tube (9) is the glass tube that and graded tube (1) are 45 ° of angles.