CN205517830U

CN205517830U - Multipurpose microtitration device

Info

Publication number: CN205517830U
Application number: CN201620109158.7U
Authority: CN
Inventors: 高向阳; 高峰伟; 朱盈蕊; 高遒竹; 张小燕; 王翠
Original assignee: Zhengzhou University of Science and Technology
Current assignee: Zhengzhou University of Science and Technology
Priority date: 2016-02-03
Filing date: 2016-02-03
Publication date: 2016-08-31
Anticipated expiration: 2026-02-03

Abstract

The utility model provides a multipurpose microtitration device, is including having the buret of scale, and the rubber rubber tube is connected to the buret upper end, establishes ball shape glass ball in the middle of the rubber rubber tube, and the size of ball shape glass ball suiting with rubber rubber tube internal diameter, port in close contact with on ball shape glass ball bottom surface and the buret. The utility model provides a multipurpose microtitration device, simple manufacture, with low costs, usable ball shape glass ball accurate control titer body and function volume keeps port in close contact with on ball shape glass ball and the buret around titrating, prevent the buret in the liquid level error takes place, guarantee measurement accuracy, and can not the gassing, but the acid -base is dual -purpose, can be used as the pipette, facilitates the use, practices thrift reagent, it is 10 times high to titrate the ordinary buret of ratio of precision.

Description

A kind of multipurpose device of mini-burette

Technical field

This utility model belongs to experimental apparatus technical field, is specifically related to a kind of multipurpose device of mini-burette.

Background technology

nullWhen experiment needs to use a certain amount of experiment liquid，Typically this liquid is initially charged with in burette，Again it is instilled in the container equipped with liquid to be measured，Owing to currently used acid buret and base buret can only be used alone，Can not exchange，And all there is certain problem，Bubble is easily produced such as base buret，Acid buret piston easily bonds，Cannot ensure to titrate the precision of liquid，And currently used burette internal diameter is bigger，Easily waste reagent，Patent CN200620029829.5 provides a kind of high-precision multifunctional environmental protection titrating device，Ball is inhaled at burette upper end set amount，Precision is higher，And reagent can be saved greatly，But it in use finds，Quantitatively inhale the problem being difficult to return to original state after ball uses the easiest extruding for a long time，Quantitatively inhale easy generation after the summer spent by ball aging，Cause inconvenient operation，Even can not use，And the bubble produced is difficult to discharge，Experiment is made to there is certain error.

Summary of the invention

The purpose of this utility model is that provides a kind of multipurpose device of mini-burette for solving the deficiencies in the prior art.

The purpose of this utility model realizes with following technical proposals:

A kind of multipurpose device of mini-burette, including carrying graduated burette, burette upper end connects rubber hose, sets spheroidal glass bead in the middle of rubber hose, the size of spheroidal glass bead adapts with rubber hose internal diameter, and spheroidal glass bead bottom surface is in close contact with burette upper port.

The internal orifice dimension of described burette lower end is 0.01-1mm, and the internal diameter at other positions is 1.5-5mm.

Burette is made up of glass tubing and the titrating head being contained in glass tubing lower end, and titrating head upper end inwall and glass tubing lower end outer wall are taper fit, and the internal orifice dimension of titrating head is 0.01-1mm, and the internal diameter of glass tubing is 1.5-5mm.

Described glass tubing lower end is frosting.

Burette lower end sets protection set.

Described titrating head is syringe needle.

Matching with burette lower end in protection set upper side, protects the sheathed inner chamber that can accommodate experiment liquid.

The multipurpose device of mini-burette that this utility model provides, makes simple, low cost, available spheroidal glass bead accurately controls to titrate volume, keep spheroidal glass bead to be in close contact with burette upper port before and after titration, prevent liquid level generation error in burette, it is ensured that certainty of measurement, and bubble will not be produced, can soda acid dual-purpose, can be used as pipet, convenient use, saving reagent, the titration common burette of ratio of precision is high 10 times.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of the protected set of this utility model band；

Fig. 3 be this utility model titrating head be the structural representation of syringe needle；

Fig. 4 is the protected set of this utility model band and the structural representation of inner chamber.

Detailed description of the invention

The multipurpose device of mini-burette that this utility model provides, as shown in Figure 1, including carrying graduated burette 2, burette 2 is made with transparent material, and lower end is tapered, and burette upper end connects rubber hose 1, spheroidal glass bead 3 is set in the middle of rubber hose 1, the size of spheroidal glass bead adapts with rubber hose internal diameter, and more than burette 2 upper port 7 internal diameter, spheroidal glass bead 3 bottom surface is in close contact with burette upper port 7；During use, can be by extruding glass bead 3 from side, ear washing bulb is utilized to draw liquid, then extruding glass bead 3, liquid level is made to drop to required scale, and continue to extrude glass bead, start to be titrated to experiment to terminate, glass bead it is pressed down against before and after titration, holding glass bead is in close contact with burette upper port, and in eliminating burette, liquid level occurs error due to glass bead titration front and back position difference, and glass bead is necessary for spheroidal, before and after ensureing extruding, to account for burette volume identical for glass bead, improves reading accuracy；Owing to glass bead 3 is in burette 2 upper end, therefore this utility model can soda acid dual-purpose, being alternatively arranged as pipette and pipet and use, and be not easy to produce bubble, even if producing bubble, being relatively easy to discharge；When rubber hose or glass bead go wrong, it is convenient for changing.

Preferably, the internal orifice dimension of burette lower end is 0.01-1mm, and the internal diameter at other positions is 1.5-5mm；As shown in Figure 3, burette is made up of glass tubing and the titrating head being contained in glass tubing lower end, titrating head can be syringe needle or the titrating head of special processing, titrating head 6 upper end inwall and glass tubing lower end outer wall are taper fit, glass tubing lower end is frosting, more closely cooperating with titrating head, the internal orifice dimension of titrating head is 0.01-1mm, and the internal diameter of glass tubing is 1.5-5mm；As shown in Figure 2 and Figure 4; burette 2 lower end sets protection set 4; match with burette lower end in protection set upper side; protect the sheathed inner chamber 5 that can accommodate experiment liquid; protection set can use the transparent materials such as glass, lucite or rigid plastics, the shape of protection set can be taper ampuliform, circular ampuliform or other arbitrary shapes；If protection set is only used for protecting the lower end of burette, then protection set is just not necessarily with the inner chamber that can accommodate liquid to be measured.

Claims

1. a multipurpose device of mini-burette, including carrying graduated burette, it is characterized in that: burette upper end connects rubber hose, spheroidal glass bead is set in the middle of rubber hose, the size of spheroidal glass bead adapts with rubber hose internal diameter, and spheroidal glass bead bottom surface is in close contact with burette upper port.

2. multipurpose device of mini-burette as claimed in claim 1, it is characterised in that: the internal orifice dimension of described burette lower end is 0.01-1mm, and the internal diameter at other positions is 1.5-5mm.

3. multipurpose device of mini-burette as claimed in claim 1, it is characterized in that: burette is made up of glass tubing and the titrating head being contained in glass tubing lower end, titrating head upper end inwall and glass tubing lower end outer wall are taper fit, the internal orifice dimension of titrating head is 0.01-1mm, and the internal diameter of glass tubing is 1.5-5mm.

4. multipurpose device of mini-burette as claimed in claim 3, it is characterised in that: described glass tubing lower end is frosting.

5. the multipurpose device of mini-burette as described in claim 1 or 4, it is characterised in that: burette lower end sets protection set.

6. multipurpose device of mini-burette as claimed in claim 3, it is characterised in that: described titrating head is syringe needle.

7. multipurpose device of mini-burette as claimed in claim 5, it is characterised in that: matching with burette lower end in protection set upper side, protects the sheathed inner chamber that can accommodate experiment liquid.