CN2111135U

CN2111135U - Double-layer flask

Info

Publication number: CN2111135U
Application number: CN 91226284
Authority: CN
Inventors: 冉隆飞
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-10-02
Filing date: 1991-10-02
Publication date: 1992-07-29

Abstract

The utility model discloses a double-layer flask which is glassware required by laboratories of schools of all levels, other laboratories and testing laboratories. The utility model adopts a double-layer structure. A small flask is arranged in a large flask. Only the circumferences of the opening of the two flasks are connected (like the insulating glass liner of a thermos flask). A circular glass nozzle and a scoop shaped glass nozzle both communicated with the included layer of the two flasks are respectively arranged on the left side and the right side of the upper end of the neck of the large flask. Experiments of thermal expansion and fountains, etc. can be effectively and conveniently demonstrated through the utility model for primary schools. A series of relative experiments, such as boiling heat, boiling point, pressure intensity, etc. can be demonstrated for secondary schools. The drying, melting and heating of the substance can proceed according to the required temperature, avoiding the substance scorching resulting from the excessive high temperature. The double-layer flask can be flexibly applied to other laboratories and testing laboratories according to functions of the double-layer flask and requirements.

Description

Double-layer flask

The utility model relates to a kind of Double-layer flask.

The utility model belongs to school and college laboratories such as primary school, middle school and other laboratories, the required glassware in laboratory.It adopts double-layer structural, makes its some function that constantly has existing flask, the function that also has existing flask and do not had and the experiment effect that is beyond one's reach.Can better demonstrate the heat expansion fountain experiment in primary school; In the middle school, about the chapters and sections of relation of boiling point, pressure, temperature, boiling heat etc. also have existing instrument the experiment effect that can't show; Also can apply in a flexible way it according to its needs in other laboratory.

The utility model is similar with existing flask substantially in appearance.As shown in drawings: difference is that Double-layer flask adopts double-layer structural, be made of (3), (4) two flasks that vary in size, two flasks only link together (as glass liner of thermos) around bottleneck and the and arranged on left and right sides near bottle mouth position connects a tubular glass mouth (1) respectively on the neck of (3) big flask, a spoon shape glass mouth (2) communicates with the interlayer of big or small two flasks.Spoon shape glass mouth actinal surface is a shade below the flask actinal surface, and the edge of spoon shape mouth should polish flat as the gas collection bottleneck.Spoon shape mouth mainly is to be used for to liquid substances such as interlayer pourings.Also it can be built with frosted glass plate in order to increase the pressure in the interlayer or to prevent that valuable gases from running away from here, or it be filled in cotton mass etc.Tubular glass mouth can connect sleeve pipe and derive steam system distilled water or derive other gas, and also can clamping conduit simultaneously with clip, jam-pack spoon shape mouth increases interlayer pressure.The also available stopper plug of the bottleneck of certain little flask (4) gets up to increase internal pressure.Also available conduit is derived gas inside and with thermometer measure internal liquid temperature.

Compare with existing flask, Double-layer flask can reduce by a tank when doing the heat expansion fountain experiment; In experiment, can not go out the cast-in-place water that goes down yet and make flask be subjected to buoyancy and tiltedly fall; The teacher can also take on the other hand the Double-layer flask that is equipped with, and takes cup that boiling water is housed to fall boiling water by spoon shape mouth in interlayer on the other hand, while predominately say, do.Fountain can be moved in whole classroom, make all interesting fountains of clear view of each student.Owing to be heated, the duration that is heated, experiment effect have also just changed to some extent.When relevant chapters and sections such as explanation pass, middle school boiling point, pressure, boiling heat, can be fixed on the iron clamp of iron stand equally.Owing to can make to show different phenomenons simultaneously, the student just is readily appreciated that, grasps the content of courses as long as conscientiously observe.Boiling with water is an example: begin to find that the water in the water little flask of boiling (4) then can not seethe with excitement in the interlayer, though temperature has 100 ℃; If resemble say previously increase interlayer pressure, then the water in the interlayer has not seethed with excitement, the water in the little flask has then seethed with excitement, but temperature still is 100 ℃.Get up at mouth plug, have different phenomenons again little flask.In heating, dry or when melting certain material, can Yin Wendu not too high and burnt, because water is arranged in the interlayer, temperature only may be in 100 ℃.At this moment it is standby also can simultaneously the steam of interlayer to be made distilled water.Certainly the liquid of also available change interlayer different boiling reaches the needed temperature of the material that is heated, dries, melts.In other laboratory, laboratory,, can bring many conveniences too as long as can apply in a flexible way.

Accompanying drawing belongs to general signal picture, (1) expression tubular glass mouth in the picture; (2) table is opened a spoonful shape glass mouth; (3) represent that big flask (4) represents little flask; (5) the little flask mouth of expression.Its all parameter is all identical with existing big or small flask, and interlayer can be according to its its size of needs flexible design.

In order to realize this Double-layer flask, as long as some relevant modes of making glass liner of thermos are got up with the mode reasonable combination of making existing flask.

Claims

A kind of flask is characterized in that being made of two flasks that vary in size, the little flask of cover in the big flask, and two flask bottlenecks link together, and near the left and right sides of bottle mouth position tubular glass mouth and spoon shape glass mouth are arranged respectively in big flask neck upper end.