CN2172677Y

CN2172677Y - Sampling burette for dosing liquid

Info

Publication number: CN2172677Y
Application number: CN 93238513
Authority: CN
Inventors: 李恒光; 陈淑华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-15
Filing date: 1993-04-15
Publication date: 1994-07-27
Anticipated expiration: 2003-04-15

Abstract

The utility model provides a sampling burette for dosing liquid, which is characterized in that the utility model comprises a scale casing tube which has a one-way air intake and measuring scales, a liquid column tube which is arranged in the scale casing tube and has a liquid column liquid filling pool used for filling the indicating liquid, and a bottle jack catheter which can be extended into a reagent bottle and is arranged on the lower end of the scale casing tube. One end of the liquid column tube is sealed, and the other end of the liquid column tube is opened. The periphery of the bottle mouth catheter is sealed with the reagent bottle. One end of a capillary tube is inserted into a bottle mouth sleeve and extended into the reagent bottle along the bottle mouth catheter, and a control valve is arranged on the other end of the capillary tube which is extended out of the bottle mouth catheter. A gas hole which is communicated with the reagent bottle is arranged on the bottle mouth catheter. The utility model has the advantages of positive pressure sampling, high measurement accuracy, high safety, and convenient use.

Description

Sampling burette for dosing liquid

The utility model relates to a kind of titration kit, particularly be a kind of quantitative liquid sampling titration kit.

General chemical laboratory, common lab, laboratory or control laboratory uses graduated cylinder, measuring cup in large quantities, moves glass wares such as (suction) liquid pipe, extracting formula sampler both at home and abroad at present, and these utensils not only use inconvenience, nor enough safety.As semi-automatic acid base titration Guan Jun solution is poured into or is pressed in the graded tube, normal pressure titration again, solution has individual transfer process like this, and must be exposed in the air.

In view of above reason, the purpose of this utility model is can replace above utensil in order to provide a kind of, quantitative liquid sampling titration kit esy to use, safe and reliable, simple in structure, that the scope of application is wide.

The scale casing that contains metering scale that contains unidirectional air inlet is arranged in the utility model, place end sealing in the scale casing and other end opening and the liquid column pipe of the liquid-injecting liquid-containing pool that can adorn indicator solution is arranged, the lower end of scale casing has can be stretched in the reagent bottle and bottleneck conduit peripheral and the reagent bottle sealing, capillary one end is through in the bottleneck conduit and along the bottleneck conduit and stretches in the reagent bottle, capillary stretches out on the outer end of conduit control valve, and the pore (referring to Fig. 1) that communicates with reagent bottle is arranged on the Bottle mouth sleeve.

Check valve (referring to Fig. 1) is arranged on the unidirectional air inlet on the above-mentioned scale casing, make that gas is irreversible to be entered in the body.

On the above-mentioned scale casing pressure-regulating valve is arranged, (referring to Fig. 1) can regulate liquid-column height to required scale.

Above-mentioned scale casing has connecting portion on the lower end, there is the connecting hole (referring to Fig. 2) of the sealing that matches with connecting portion on the scale casing lower end upper end of bottleneck conduit, easily removable and washable, dry, install, be easy to processing, and a scale casing can be with addition of several bottleneck conduits of worker, cost reduces, also be easy to collection, be easy to clean and use wider.

The utility model places and is air-tight state on the reagent bottle, pressurize to the scale casing inside irreversible by unidirectional air inlet during sampling, fluid column in the liquid column pipe volume that (simultaneously air pressure make the liquid reagent bottle in enter capillary) indicates pressure and will be taken a sample by conversion pressure one-tenth that thereupon rises, liquid-column height can be controlled by control valve, open control valve and can emit liquid quantitatively, carry out malleation sampling or titration.Its measuring principle:

According to gas law: dv=kd 1/ (p)

∴

V＝∫kd 1/(p)

V＝K（ 1/(P2) － 1/(P1) ）

Pressure after the P2--pressurization

Pressure before the P1--pressurization

Amount of liquid that V--gets

Compare with existing sampler etc., the utlity model has following advantage:

1., accurate measurement.Calculate by the gas law formula is approximate,, can reach the purpose of accurate measurement again through the experiment calibrated scale.Scope according to sampling amount can process series of products.

2., safe and reliable.Especially volatile to those, meet air easily decompose, easily oxidation, facile hydrolysis, severe corrosive, concentrated acid, concentrated base are arranged, virulent inflammable and explosive liquid chemical reagent avoids during sampling that human body sucks, the skin contact, can not use ventilating kitchen, but the secluding air sampling.

3., can be used as titration uses.Can avoid shifting and being exposed in the air, use but also can do anhydrous titration.

4., extremely easy to use.The general reagent Packaging Bottle almost is the same, can by the bottleneck size, take advantage of liquid what, get the scope processing of liquid measure, every kind of reagent or reagent bottle only need dispose a secondary sampler, get empty one bottle and are installed on new one bottle again.Only need in the time of quantitatively the indication fluid column is transferred to required scale, corrosion-resistant.

5., with low cost, simple in structure, handling ease.And can utilize the original reagent Packaging Bottle.Can adopt pure glass material to make.

6., applied widely.All units that relates to chemicals, reagent all can adopt, and as chemical, medical and health department, the big or small laboratory of industrial and mining enterprises, control laboratory, laboratory etc. are all configurable.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model overall structure schematic diagram

Fig. 2 is the utility model separate type schematic diagram

Embodiment 1:

Fig. 1 has provided the utility model monolithic construction schematic diagram.Unidirectional air inlet 2 is arranged on the scale casing 1, regulate mouth 3.On the unidirectional air inlet 2 check valve 4 is housed, the other end of check valve 4 can with add balloon 5 and be connected.Regulate on the mouth 3 control valve 6 is housed.Control valve 6 can adopt the rubber tip on the base buret to replace also useable glass two logical pistons or can special control valve.Liquid column pipe 7 places in the scale casing 1 and scale casing 1 is stretched out in its upper end, adds a cover 8 placed on it and sealings (time spent can load onto check valve in liquid column pipe 7 upper ends so that emptying or adding indicator solution).Liquid column pipe 7 other ends be opening and on have fluid column to take advantage of liquid pool 9.Capillary 10 1 ends pass the bottleneck conduit 11 of scale casing bottom and can stretch into the bottom of reagent bottle 12 and the other end is equipped with control valve 13.Control valve 13 can adopt glass two logical piston or base buret rubber tip.There is the pore 14 that communicates with the reagent pipe lower end of bottleneck conduit 11.

During use, bottleneck conduit of the present utility model stretched into the reagent bottleneck and with sealing ring 15 sealing.

Embodiment 2:

Fig. 2 has provided the utility model separate type and has implemented illustration.Present embodiment 2 basic with embodiment 1 with, not existing together be scale casing 16 with bottleneck conduit 17 is to be equipped with by thereon connecting portion 18 and connecting hole 19 standard grounds respectively.

Claims

1, quantitative liquid sampling titration kit, it is characterized in that having in the described titration kit scale casing that contains metering scale that contains unidirectional air inlet, place end sealing in the scale casing and other end opening and the liquid column pipe of the liquid-injecting liquid-containing pool that can adorn indicator solution is arranged, the lower end of bottleneck has can be stretched in the reagent bottle and bottleneck conduit peripheral and the reagent bottle sealing, capillary one end is through in the bottleneck conduit and along the bottleneck conduit and stretches in the reagent bottle, capillary stretches out on the outer end of bottleneck conduit control valve, and the pore that communicates with reagent bottle is arranged on the bottleneck conduit.

2, quantitative liquid sampling titration kit as claimed in claim 1 is characterized in that on the unidirectional air inlet on the described scale casing check valve being housed.

3, quantitative liquid sampling titration kit as claimed in claim 1 is characterized in that on the described scale casing pressure-regulating valve being arranged.

4, quantitative liquid as claimed in claim 1 sampling titration kit is characterized in that on the described scale casing lower end connecting portion being arranged, and there is the connecting hole of the sealing that matches with connecting portion on the scale casing lower end upper end of bottleneck conduit.