CN2593184Y

CN2593184Y - Liquid density measuring instument

Info

Publication number: CN2593184Y
Application number: CN 02290448
Authority: CN
Inventors: 黎鹏; 张毅
Original assignee: Wuhan No 11 Middle School
Current assignee: Wuhan No 11 Middle School
Priority date: 2002-12-19
Filing date: 2002-12-19
Publication date: 2003-12-17
Anticipated expiration: 2012-12-19

Abstract

The utility model relates to a density measuring instrument, particularly a liquid density measuring instrument. The utility model is characterized in that the utility model is composed of two containers with bottle stoppers and two graduated measuring pipes, wherein the measuring pipes can thread through the bottle stoppers to be inserted in the bottom of the containers; the two containers are connected by a three-way pipe, and the other end of the three-way pipe is connected with a rubber ball; then, the upper end of the rubber ball is provided with a control valve. The utility model can more conveniently and accurately measure the density of any liquids so as to fetch up the shortage of the ordinary density meter. The utility model can solve the problem of measuring a small amount of liquid (usually 10 ml) and the liquid with the larger density. A light meter and a heavy meter of the original density meter are combined into a whole, which can fill up the blank that a special instrument can measure a small amount of liquid and the liquid with the larger density. Simultaneously, the utility model can also enlarge the measuring range of the liquid density. The utility model can detect the purity of various liquids, such as alcohol purity detecting operations, gasoline purity detecting operations, etc.

Description

The fluid density tester

Technical field

The utility model relates to a kind of instrument of density measurement, particularly a kind of liquid density measurement tester.

Background technology

Measuring fluid density has experimental method and densimeter method, and it is more loaded down with trivial details usually to measure fluid density with experimental method; Densitometer is an instrumentation of measuring fluid density, it is that equilibrium principle when suspending according to object is made, but there are four big defectives in it: the one, and densitometer is suspended, liquid to be measured must surpass a certain amount of (needing the hundreds of milliliter usually), then can't measure the liquid that is less than this amount; The 2nd, to the liquid (as mercury) of big density, densitometer can not suspend, thus also can't measure, the 3rd, densitometer is divided into light table and heavy table, is used for measuring density respectively less than water with greater than the fluid density of water, and different liquids is measured makes troubles; The 4th, existing densitometric measurement range is less (gently shows heavily to show at 1.000-2.000 unit: gram/cubic centimetre) at 0.700-1.000.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of liquid density measurement tester, and it is less that it has solved existing densimeter measurement scope, operates loaded down with trivial details problem.

The technical solution of the utility model is achieved in that it is made up of the measuring tube of two band containers of bottle stoppers and two band scales, measurement is passed bottle stopper and is inserted container bottom, two containers connect by three-way pipe, and the three-way pipe other end is connected to rubber ball, and operation valve is equipped with in the rubber ball upper end.Described container preferably adopts vial, and testing tube preferably adopts glass tube.

The utility model is made according to the fluid column equilibrium principle, increases or reduce the pressure difference at fluid column two ends, and liquid height will change, when fluid column is static, pressure difference Δ P=ρ gh (be fluid density, h is the fluid column height), to different liquids,, ρ is arranged then if keep pressure difference Δ P identical ₁h ₁=ρ ₂h ₂So I expect using relative method, promptly measure the density of testing liquid according to the liquid of known density.

The utility model is as the instrumentation of measuring fluid density, utilize relative method can measure any density of liquid more convenient and exactly, remedied the deficiency of common density meter, solved the mensuration problem of small amount of liquid (common 10 milliliters) and big density liquid, original densitometric light table and heavily the table unite two into one, fill up the blank of the instrumentation of measuring small amount of liquid and big density fluid volume density, also increased the measurement range (all available this instrument of nearly all fluid density is measured) of fluid density greatly.The purity that also can detect various liquid as: detect the true and false of wine, whether seep water in the gasoline etc.Its design is ingenious, makes simply, has stronger science and practicality.

Description of drawings

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

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As shown in Figure 1, hard respectively straight cutting is gone into a glass tube C who has scale in two sealed glass bottle A, B, insert at the bottom of A, the B bottle glass tube C lower end, the upper end communicates with atmosphere by rubber stopper, in two bottles, be respectively charged into the titer H (liquid of known density, as water) and liquid I to be measured, with a threeway D two bottles of upper ends of A, B air is partly coupled together, when in bottle, charging into air, identical all the time with the pressure that keeps two bottles of liquid level upper air, promptly keep in two glass tubes fluid column two ends pressure difference identical, according to ρ _{To be measured}H _{To be measured}=ρ _MarkH _Mark, get ρ _{To be measured}=(h _Mark/ h _{To be measured}) ρ _MarkIf, read liquid in two glass tubes of a certain state and annotate highly, can measure the density of testing liquid.

Concrete measuring process is as follows:

1, opens bottle stopper to be measured, liquid to be measured is injected bottle to be measured (liquid is minimum to reach 10 milliliters), good seal piston.

2, with the rubber ball of band valve, give two bottles of inflations, treat that titer rises to be above standard and stop inflation behind the scale.

3, slowly open valve, when the standard liquid level of allowing is got back to the master scale place, valve-off (keeping this moment h to become).

4, read the high h of fluid column to be measured

5, by ρ _{To be measured}=(h _Mark/ h _{To be measured}) ρ _Mark, can measure the density of liquid to be measured.

Claims

1, a kind of fluid density tester, it is characterized in that: it is made up of the container of two band bottle stoppers and the measuring tube of two band scales, measures and passes bottle stopper insertion container bottom, and two containers connect by three-way pipe, the three-way pipe other end is connected to rubber ball, and operation valve is equipped with in the rubber ball upper end.

2, according to a kind of fluid density tester of claim 1, it is characterized in that: described container is a vial.

3, according to a kind of fluid density tester of claim 1, it is characterized in that: testing tube is a glass tube.