CN201812404U

CN201812404U - Osmosis demonstration device

Info

Publication number: CN201812404U
Application number: CN2010205908373U
Authority: CN
Inventors: 冯芝华
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-22
Filing date: 2010-10-22
Publication date: 2011-04-27
Anticipated expiration: 2020-10-22

Abstract

The utility model relates to an osmosis demonstration device which comprises a base (5), a U-shaped tube, two graded tubes (3) and two funnels (1), wherein the U-shaped tube is arranged on the base (5); the graded tube (3) and the funnel (1) at the left side are connected with the graded tube (3) and the funnel (1) at the right side by the U-shaped tube; the bottom of each graded tube (3) is provided with a switch (4); the middle section of the U-shaped tube is further provided with an impermeable membrane (6) and a semi-permeable membrane (7); a handle for controlling the impermeable membrane (6) and the semi-permeable membrane (7) to swing is arranged outside the U-shaped tube; and a floating mark (2) is arranged in each graded tube (3). The osmosis demonstration device has the advantages of being simple in operation process, obvious osmosis effect, precise observation result, short demonstration time and multiple demonstration functions, further, the floating marks in a brilliant color can facilitate the observation process.

Description

A kind of osmosis apparatus for demonstrating

Technical field

The utility model relates to a kind of technical field of high school biology teaching aid, is specifically related to a kind of osmosis apparatus for demonstrating.

Background technology

In the bioconversion medium, often do biomembranous chemosmotic experiment now, this experiment can also be used for many fields such as medical science, agricultural and industry manufacturing.In biology laboratory or classroom instruction, the funnel and the beaker that often adopt long-neck to stand upside down, the oral area of long neck funnel is put semi-permeable diaphragm, in the bucket body of long neck funnel, fill concentration and be 30% sucrose solution, its liquid level can stretch into 1 centimetre of neck, in beaker, contain supernatant water, long neck funnel is inverted in the beaker, and make the water surface in the beaker not have long-neck to fall the bucket body portion of funnel, with concentration is that 30% sucrose solution liquid level flushes, because there are concentration difference in the downside of semi-permeable diaphragm and the upside of semi-permeable diaphragm, clear water permeates in bucket body, and the liquid level in the bucket body rises.At this moment, can observe the amount of rising by its neck, just clear water sees through the amount of semi-permeable diaphragm.This experimental provision, though mechanism is simple,, inconvenient operation, the student is difficult for grasping, and it is slow that experimental result draws speed, and the difficult observation of the rising of the water surface, and it is bad to be used for the class demonstration effect.

The Chinese patent publication number is CN200998669, the utility model patent instructions that open day is on January 2nd, 2008 discloses a kind of " simple and easy permeability test pipe ", this utility model is made of transfer pipet, connect " y " shape pipe in the lower end of transfer pipet, and the tube chamber of transfer pipet is connected with the tube chamber of " y " shape pipe, semi-permeable diaphragm on suit on the end opening of " y " shape pipe, and fix with bounding wire, fill concentration and be 30% aqueous sucrose solution in " y " shape pipe, stifled on the side pipe mouth of " y " shape pipe have a rubber plug.This simple and easy permeability test pipe, not only simple in structure, and since little, the structure of volume be fixed as one, so make more convenient to operate and be easy to carry.But this utility model lacks necessary mark, be unfavorable for that the student observes in the classroom, and the effect of observation is more single, is unfavorable for that the student understands chemosmotic occurring principle on the whole.

The utility model content

The purpose of this utility model be single at existing simple and easy permeability test pipe demonstration DeGrain, observing effect, be unfavorable for deficiencies such as the student understands, a kind of osmosis apparatus for demonstrating that effect is obviously clear and definite, observing effect is various, the student understands principle easily of demonstrating is provided.

The purpose of this utility model realizes by following technological means: a kind of osmosis apparatus for demonstrating, include base, the U type pipe that base is placed above, and by each graduated tube and funnel of one about U type pipe connection setting, the bottom of graduated tube also is provided with switch, the stage casing of described U type pipe also is provided with impermeable membrane and semi-permeable diaphragm, also is provided with the handle of control impermeable membrane and semi-permeable diaphragm swing in the outside of U type pipe.

The inside of described graduated tube also is provided with buoy.

Compared with prior art the utlity model has following tangible advantage: this osmosis apparatus for demonstrating is simple to operate, and the osmosis effect is obvious, and the result of observation is very accurate, it is shorter to demonstrate the used time, demo function is various, and, be convenient to more observe by the buoy of bright-colored.The utility model is very easy to be understood principle by the student on the whole, is easy to accept classroom instruction knowledge.

Description of drawings

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

Among the figure, 1-funnel, 2-buoy, 3-graduated tube, 4-switch, 5-base, 6-impermeable membrane, 7-semi-permeable diaphragm.

Embodiment

Below in conjunction with description of drawings and embodiment the utility model is described in further detail:

A kind of osmosis apparatus for demonstrating as shown in Figure 1, include base 5, the U type pipe that base 5 is placed above, and by each graduated tube 3 and funnel 1 of one about U type pipe connection setting, the bottom of graduated tube 3 also is provided with switch 4, the stage casing of described U type pipe also is provided with impermeable membrane 6 and semi-permeable diaphragm 7, also is provided with the handle of control impermeable membrane 6 and semi-permeable diaphragm 7 swings in the outside of U type pipe.The utility model is when concrete the use, can at first select impermeable membrane 6 to use, promptly, contained clear water in the funnel 1 of one end, contained certain density sucrose solution in the funnel 1 of the other end, opened the switch 4 at two ends then, after observation a period of time, can find, the liquid level at two ends can not produce any variation, then, selects to use instead semi-permeable diaphragm 7 by the swing of handle, and, by handle impermeable membrane 6 swing is removed, observe a period of time again after, can find, contain liquid level in the graduated tube 3 of sucrose solution slowly rising, promptly observe chemosmotic generation.Deng do not test entirely finish after, semi-permeable diaphragm 7 also can also be swung and be removed, the graduated tube 3 at two ends is linked up fully, soon, the liquid level at two ends can be equal fully.The utility model is very easy to be understood principle by the student on the whole, is easy to accept classroom instruction knowledge.

The inside of described graduated tube 3 also is provided with buoy 2.Be provided with like this, strengthened observing effect of the present utility model, buoy 2 can be set to have the foam of bright-colored or plastics etc. and make.

In a word, the utility model provide a kind of simple to operate, observe osmosis apparatus for demonstrating clear and definite, that the demonstration time is short.The above; it only is a part of embodiment of the present utility model; protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.

Claims

1. osmosis apparatus for demonstrating, include base (5), the U type pipe that base (5) is placed above, and by each graduated tube (3) and funnel (1) of one about U type pipe connection setting, the bottom of graduated tube (3) also is provided with switch (4), it is characterized in that: the stage casing of described U type pipe also is provided with impermeable membrane (6) and semi-permeable diaphragm (7), also is provided with the handle of control impermeable membrane (6) and semi-permeable diaphragm (7) swing in the outside of U type pipe.

2. a kind of osmosis apparatus for demonstrating according to claim 1 is characterized in that: the inside of described graduated tube (3) also is provided with buoy (2).