CN200945435Y

CN200945435Y - Anti-leakage anti-block acid-base common using piston type burette

Info

Publication number: CN200945435Y
Application number: CN 200620074340
Authority: CN
Inventors: 顾晓春
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-30
Filing date: 2006-06-30
Publication date: 2007-09-12
Anticipated expiration: 2016-06-30

Abstract

An anti-leakage anti-block acid-base common using piston type burette consists of a burette, a triple valve and an injector. On the top of the burette (1) made of glass or acid-proof and alkali-proof plastics is arranged the triple valve (2). On one side of the valve is arranged a control switch (3), on the other side is arranged an air inlet port (4), on the upper end is arranged a fluid feeding port (5). Connected with the air inlet port is a plastic flexible tube (6), the other end of the tube is joined with the injector (7). This utility model overcomes the disadvantages of the prior dropper that the acid and the alkali can not be filled in the same tube, which is accompanied by easy leakage and block. This utility model has the advantages of compatibility between acid and alkali, convenience and safety, simple manufacture, convenient operation and low cost.

Description

Leakproof is anti-blocking, the shared piston type buret of soda acid

Technical field

The utility model belongs to instrument field, more particularly a kind of chemical apparatuses that is used for acid base titration.

Background technology

The buret that uses generally is divided into two kinds at present: a kind of is the acid buret that the lower end has glass piston, be used to hold acids solution or oxidizing solution: another kind is a base buret, be used to hold bases solution, its lower end connects one section rubber tube, in put a bead, the rubber tube lower end connects a tip glass tube again.The former can not hold bases solution, in order to avoid glass piston is corroded; The latter can not hold acids and oxidizing solution, in order to avoid to the rubber tube corrosion, so two kinds of burets can not be used with.And, when using acid buret, tend to cause in the titration process piston leakage or stop up because vaseline is smeared the sharp mouth place piston that causes on the high side because of the vaseline of smearing between piston and piston groove inwall is on the low side, thereby make troubles to the operator, influenced the raising of conventional efficient, and when using base buret, have influence on the accuracy of experimental result often because drip nozzle implication bubble is wayward.So far the end sees that the buret that mutual dual-purpose is arranged occurs.

Summary of the invention

The purpose of this utility model is to solve above-mentioned deficiency, and the buret that a kind of leakproof is anti-blocking, soda acid is shared is provided.

Technical solution of the present utility model: the utility model is made up of buret, triple valve, syringe, it is characterized in that: triple valve is housed in the buret upper end, valve one side is a gauge tap, opposite side is an air inlet, the valve upper end is a filling opening, be connected to plastic flexible pipe on the air inlet, the flexible pipe other end is connected with syringe.

Advantage of the present utility model: because utilization air pressure balance principle, adopt the operation of piston driving, so there are not problems such as leakage, obstruction, and it is can soda acid shared, have convenient and safe characteristics, can improve conventional efficient and result's accuracy effectively, manufacture craft is simple, easy to operate, with low cost, using value is arranged.

Be further elaborated below in conjunction with accompanying drawing.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model;

Inner front view, b schematic diagram when accompanying drawing 2a is the utility model triple valve liquid feeding;

Inner front view, b schematic diagram when accompanying drawing 3a is the utility model triple valve dropping liquid.

Specific embodiments

Referring to figure, on buret (1) top that glass or acid and alkali-resistance plastics are made triple valve (2) is housed, valve one side is gauge tap (3), opposite side is air inlet (4), the valve upper end is filling opening (5), is connected to plastic flexible pipe (6) on the air inlet, and the flexible pipe other end is connected with syringe (7), be shaped on scale (8) on the buret, the buret lower end has cap sleeve (9).

Using method: rotary valve switch during liquid feeding (seeing Fig. 2 b) makes filling opening (5) be communicated with following hole and (sees Fig. 2 a), then toward filling opening (5) liquid feeding.During titration, rotary valve switch (seeing Fig. 3 b), the hole is communicated with air inlet (4), and (see Fig. 3 a), remove cap sleeve (9), slowly the push-and-pull syringe piston is regulated the titration initial position, begins titration then, and slowly the pushing syringe piston drips titrating solution.

Claims

1, a kind of leakproof is anti-blocking, the shared piston type buret of soda acid, form by buret, triple valve, syringe, it is characterized in that: triple valve (2) is housed on buret (1) top that glass or acid and alkali-resistance plastics are made, valve one side is gauge tap (3), and opposite side is air inlet (4), and the valve upper end is filling opening (5), be connected to plastic flexible pipe (6) on the air inlet, the flexible pipe other end is connected with syringe (7).

2, by anti-blocking, the shared piston type buret of soda acid of the described leakproof of claim 1, it is characterized in that: be shaped on scale (8) on the buret, the buret lower end has cap sleeve (9).