CN2312494Y - Model for demonstration of liquid pressure - Google Patents

Abstract

The utility model relates to a teaching tool for demonstrating liquid pressure toward the bottom of a vessel, which is composed of a long neck, a bottom-removing vessel, a flexible watertight membrane, a stand with enough weight and a weighing appliance, wherein, the watertight membrane is sealed at one end of the vessel fixed at the stand and the flexible watertight membrane on the vessel is engaged with the disk surface of the weighing appliance. The utility model has the advantages of direct variable situation demonstration for liquid pressure toward the bottom of the vessel, clearness, simple structure, convenient operation, and good teaching effect.

Description

The fluid pressure experimental provision

The utility model relates to demonstrate a kind of teaching aid of liquid to container bottom pressure.

, describe with the pressure of liquid to container bottom usually during fluid pressure in physics teaching, explanation, three kinds of situations are arranged in theory: 1/, liquid is to the pressure F＜liquid weight G of container bottom, and 2/, F＞G, 3/, F=G.But for many years, never have a kind of experimental provision, demonstrate out this several situations intuitively, just analyze explanation theoretically for observation; Consequently the student enforces one's memory, can not produce thinking in images, is admitted in theory, in fact can entertain the doubt attitude, when using this knowledge to deal with problems, tends to go wrong.

The purpose of this utility model is to remedy the deficiencies in the prior art part, and a kind of fluid pressure experimental provision teaching aid of demonstrating the container bottom effect is provided.

Can take following technical scheme to realize purpose.The fluid pressure experimental provision, it by long-neck, remove bottom utensil, flexible watertight film, the pallet of enough weight and weighing utensil constitute; The watertight film is encapsulated in an end of vessel, and vessel are fixed on flexible watertight film on the pallet, on it and the card of weighing utensil matches.

The relative prior art of the technical program has following advantage and effect:

Can directly demonstrate the situation of change of liquid to container bottom pressure, cheer and bright; Its simple structure, easy to operate; Have preferably and teach, learn effect.

In conjunction with the accompanying drawings, embodiment is described in further detail the content of the technical program.

Fig. 1 is a kind of structure demonstration synoptic diagram of fluid pressure experimental provision;

Fig. 2 is that other of device shown in Figure 1 plants the demonstration synoptic diagram.

Under the prerequisite that satisfies the said structure requirement, specific constructive form, amount of capacity as for fluid pressure experimental provision integral body, each funtion part, each zero member, connection between member, fixed form, position relation etc., all can be according to using needs, take the circumstances into consideration to set, they can both realize purpose, guarantee the usability and the effect of this fluid pressure experimental provision.

The long-neck of flexible watertight film in the encapsulation, remove bottom utensil, the container of constituent apparatus liquid; Long-neck, no bottom utensil can or go the flask at the end or other structure to constitute by the normal bottles of going to the end and pipe, bottle stopper assembling; Flexible watertight film can adopt rubber, plastics, rubber and plastic or other film waterproof, that certain intensity is arranged to constitute; Need by experiment, flexible watertight film can be encapsulated in the big end of vessel, also can be encapsulated in the small end of vessel.In order to show the weighing utensil of liquid, can adopt formations such as electronic scale or table scale or square position claim, as long as it has the card that matches with the container bottom plane to container bottom pressure size.The pallet of enough weight refers to that himself weight should be greater than the liquid weight of intending injecting, the influence of not injected liquid weight.Container is fixed on the support arm of pallet, promptly the weight of container matches with card at the bottom of bearing, also should make the flexible watertight film of container by pallet fully, and just in the contact, the reading of weighing this moment utensil is zero; When injecting liquid in container, liquid is out of shape at the bottom of oppressing flexible watertight film; Because pallet has enough weight, it can overcome the effect of deformation force, prevents by liquid deformation force jack-up or topples over, and keeps mutual due position, interactively, makes liquid act on the weighing utensil fully to the pressure of container bottom; The reading value of weighing utensil is the pressure size of liquid to container bottom.Weigh up inject the actual weight of liquid, compare with corresponding pressure reading value, just can obtain liquid to the variation relation between container bottom pressure and liquid weight.

Among the experimental provision of fluid pressure shown in the accompanying drawing embodiment, long-neck, go bottom utensil by going end conventional bottle 1, bottle stopper 2 and glass tube 3 to form, glass tube is ganged up in bottle stopper, and bottle stopper is contained in the oral area of end bottle.On demand, be encapsulated in the bottom of bottle or the upper port place formation container of oral area or glass tube with rubber diaphragm 6, it and electronic scale 4, iron stand 5 assemblings constitute experimental provisions.Under the state, when liquid level is positioned at certain, middle part of bottle, all can tests and obtain F=G shown in the accompanying drawing 1; When liquid level is positioned at certain of glass tube, all can tests and obtain F＞G; Under the state shown in Figure 2, when liquid level is in any position of bottle, all can tests and obtain F＜G.Complete is universal utensil, makes things convenient for, is easy to get, cheap.Its demonstration performance, result of use are good.

Claims (2)

1, a kind of fluid pressure experimental provision is characterized in that: it by long-neck, remove bottom utensil, flexible watertight film, the pallet of enough weight and weighing utensil constitute; The watertight film is encapsulated in an end of vessel, and vessel are fixed on flexible watertight film on the pallet, on it and the card of weighing utensil matches.

2, fluid pressure experimental provision as claimed in claim 1 is characterized in that: long-neck, go bottom utensil by going end conventional bottle, bottle stopper and glass tube are formed, and glass tube is ganged up in bottle stopper, and bottle stopper is contained in the oral area of end bottle.

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