CN214897214U

CN214897214U - Chemical demonstration device

Info

Publication number: CN214897214U
Application number: CN202121351308.2U
Authority: CN
Inventors: 张才红
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-11-26
Anticipated expiration: 2031-06-17

Abstract

The utility model provides a chemistry presentation device relates to chemistry teaching field. The chemical demonstration device comprises a support frame and a drying tube, wherein the drying tube is arranged on the support frame, the extension direction of the drying tube is intersected with the horizontal plane, and a collecting bottle for collecting adsorption liquid is arranged below the drying tube. An object of the utility model is to provide a chemistry presentation device, its experiment progress that can accelerate the active carbon performance experiment improves the experimental effect, practices thrift simultaneously and tests raw and other materials, avoids extravagant.

Description

Chemical demonstration device

Technical Field

The utility model relates to a chemistry teaching field particularly, relates to chemistry presentation device.

Background

The activated carbon is prepared by pyrolyzing and activating carbon-containing raw materials such as wood, coal, petroleum coke and the like, has a developed pore structure, a larger specific surface area and abundant surface chemical groups, and is a general term for carbon materials with stronger specific adsorption capacity; activated carbon appears often in chemical teaching, the teacher of chemistry at present stage is when showing the performance of activated carbon for the student, the means that adopts usually is in directly placing the activated carbon in test tube or household utensils, introduce into pigmented liquid in test tube or household utensils afterwards, after a period of time of stewing, let the student observe the change of liquid colour, this experimental apparatus is comparatively simple, but the experimental time is long, the experimental effect is slow, in order to guarantee the significance of experimental phenomenon, need put in relatively abundant liquid and activated carbon, and to placing the activated carbon in test tube or household utensils, it has been polluted and has not had the way to put back to former splendid attire household utensils, also not have unnecessary household utensils splendid attire, can only directly abandon after the experiment completion, cause the waste.

In summary, we propose a chemical demonstration apparatus to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chemistry presentation device, its experiment progress that can accelerate the active carbon performance experiment improves the experimental effect, practices thrift simultaneously and tests raw and other materials, avoids extravagant.

The embodiment of the utility model is realized like this:

the chemical demonstration device comprises a support frame and a drying tube, wherein the drying tube is arranged on the support frame, the extension direction of the drying tube is intersected with the horizontal plane, and a collecting bottle for collecting adsorption liquid is arranged below the drying tube.

A drying tube is a device used in chemical experiments to dry or remove impurities from a gas (liquid). Usually, connectors are arranged at two ends for connecting a conduit, and a solid desiccant or an impurity removing agent is contained in the middle. When gas (liquid) flows into the drying tube from one end, impurities in the gas (liquid) are separated from the gas (liquid) due to chemical reaction with the drying agent or the impurity removing agent, and the relatively pure gas (liquid) flows out from the other end. A teacher places active carbon in a drying tube before class, then fixes the drying tube filled with the active carbon on a support frame, when demonstration is needed in the teaching process, places a collecting bottle at the lower side of the outlet end of the drying tube, slowly pours colored liquid into the inlet end of the drying tube, the colored liquid flows out from the outlet end of the drying tube through the adsorption of the active carbon and falls into the collecting bottle to complete the operation of the whole experiment, in the operation process, the colored liquid can be slowly placed in a small amount, the adsorbed and purified liquid falls into the collecting bottle, the color change can prove the adsorption effect of the active carbon, the experiment effect can be observed by the small amount of the colored liquid, the time is saved, the usage amount of the active carbon is prevented from being saved, and the residual active carbon which does not completely lose the effect can be kept in a demonstration device, the chemical demonstration device is used in the next experiment, so that the effect of saving raw materials is achieved, and it is worth explaining that one embodiment of the chemical demonstration device can also be used for demonstrating performance demonstration experiments of other drying agents or impurity removal agents.

In some embodiments of the present invention, the drying tube opening is provided with a rubber plug.

The rubber stopper is a sealing device used in chemical experiments, is made of rubber and is also called a rubber stopper, and it is worth explaining that the rubber stopper can be used at two ports in a drying tube; the two rubber plugs can be opened when the experiment is started, then the colored liquid is slowly poured into the drying tube, and the liquid directly flows into the collecting bottle below the outlet end of the drying tube after flowing through the drying tube.

In some embodiments of the present invention, the rubber stopper is a single-hole rubber stopper, and the single-hole rubber stopper is provided with a syringe.

The single-hole rubber stopper is the rubber stopper of only beating a hole in the middle of the rubber stopper, and the rubber stopper can punch through the hole puncher to insert the glass pipe and form connecting device, can derive gas or liquid in the sealed container, be worth explaining, this utility model embodiment, the detect reagent of experiment usefulness can be coloured gas, the syringe draws partly coloured gas in advance before the experiment, after starting the experiment, push down the syringe, coloured gas enters into the drying tube, flows through the adsorbent in the drying tube under the pressure of syringe, it is discharge from the exit end of drying tube to become not coloured gas finally.

In some embodiments of the present invention, the support frame includes a base, the base is provided with a main support, and the main support is provided with an adjusting frame in a longitudinal sliding manner.

The main support uses the cross to press from both sides with the alignment jig to be connected and fixed, is provided with the scale mark on the main support, can carry out the adjustment of height according to the actual experiment condition.

In some embodiments of the present invention, the drying tube is one of a single-ball drying tube and a double-ball drying tube.

The single-ball drying tube is a glass tube with a thick upper part and a thin lower part. The upper opening of the tube is round, which can be used to increase the mechanical strength. The lower part of the thick tube is provided with a bulb for storing the solid desiccant. The lower end of the ball is welded with a section of thin glass tube which is used for filling glass wool and is inserted into a cork to be fixed on a device to be dried. The straight two-ball drying tube has the appearance similar to that of the straight one-ball drying tube, and only one small ball is added to the thick tube, so that the two-ball drying tube is mainly used for storing glass wool or alkali stone wool and can also be used for storing different drying agents, and the absorption effect can be further improved.

In some embodiments of the present invention, the outlet end of the drying tube is provided with a first control valve.

The first control valve is a flow control valve, which is also called a 400X flow control valve, and is a multifunctional valve that controls flow by adopting a high-precision pilot mode. The valve is suitable for the pipeline of water distribution pipe which needs to control flow and pressure, keeps the preset flow unchanged, limits the overlarge flow to a preset value, and properly reduces the upstream high pressure, so that the flow of the downstream of the main valve is not influenced even if the pressure of the upstream of the main valve changes.

In some embodiments of the present invention, the outlet end of the drying tube is connected to a burette.

The burette is the main measuring apparatus used in the titration analysis method, and can be divided into two types: one is an acid burette and the other is a base burette. The lower end of the acid burette is provided with a glass piston, and can be filled with acidic or oxidative titration liquid, but can not be filled with alkaline titration liquid, because the alkaline titration liquid can lead the piston to be bonded with a piston sleeve and is difficult to rotate. The basic burette is used for containing alkaline solution, the lower end of the basic burette is connected with a rubber tube, glass beads are placed in the rubber tube to control the solution to flow out, and the lower end of the rubber tube is connected with a sharp-nose glass tube. All solutions capable of reacting with the rubber tube, such as potassium permanganate, iodine and the like, cannot be filled into the basic burette, and the burette can directly control the outflow of experimental liquid purified by the drying agent.

The utility model discloses an in some embodiments, including the stock solution bottle, inlet and liquid outlet have been seted up to above-mentioned stock solution bottle, and above-mentioned liquid outlet is connected with the water pump, and above-mentioned water pump output end is connected with the pipe, and above-mentioned pipe free end is connected with above-mentioned drying tube inlet end.

Before the experiment, through the required liquid that has the colour of inlet in to stock solution bottle, at the in-process of experiment, if need many times experiment can extract at any time, and need not all put into the experiment liquid before the experiment at every turn, can practice thrift some work load. In addition, the embodiment of the utility model provides an add the water pump, the water pump is the machinery of carrying liquid or making liquid pressure boost. The mechanical energy or other external energy of the prime motor is transmitted to liquid, so that the energy of the liquid is increased, the liquid is mainly used for conveying the liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, the liquid in the liquid storage bottle is pumped out by the water pump, and the liquid flows through the liquid outlet and the guide pipe and then enters the drying pipe to carry out corresponding experiments.

In some embodiments of the invention, the conduit is a hose, the hose being provided with a second control valve.

The hose is characterized by flexibility, good flexibility, no blockage and stiffness; the weight is light, and the aperture consistency is good; the corrosion resistance and the high temperature resistance are good; the bending resistance, the tensile property and the side pressure resistance are strong; soft and smooth, and easy to thread, install and position. The addition of the hose enriches the way in which the conduit is installed. Meanwhile, a second control valve is arranged to further control the flow rate of the liquid.

In some embodiments of the present invention, the collecting bottle is provided with a waste liquid port, the waste liquid port is connected to a recycling pipe, and a free end of the recycling pipe is connected to the inlet.

Waste liquid mouth department is provided with the ooff valve, and the back is accomplished in the experiment, opens the ooff valve of waste liquid mouth department, and the waste liquid is via the recovery tube inflow inlet, gets into the stock solution bottle in, can recycle, is worth explaining, when retrieving the waste liquid volume in the stock solution bottle too much, the liquid colour for the experiment is when by the neutralization, can adjust through adding the colour reagent.

Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least: an object of the utility model is to provide a chemistry presentation device, its experiment progress that can accelerate the active carbon performance experiment improves the experimental effect, practices thrift simultaneously and tests raw and other materials, avoids extravagant.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a chemical demonstration apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a chemical demonstration apparatus according to another embodiment of the present invention;

fig. 3 is a cross-sectional view of the single-hole rubber stopper of fig. 2.

Icon: 1-base, 2-support frame, 3-drying tube, 4-collection bottle, 5-rubber stopper, 6-single hole rubber stopper, 7-injector, 8-main support, 9-adjusting frame, 10-single ball drying tube, 11-double ball drying tube, 12-first control valve, 13-burette, 14-liquid storage bottle, 15-liquid inlet, 16-liquid outlet, 17-water pump, 18-conduit, 19-hose, 20-second control valve, 21-waste liquid outlet, and 22-recovery tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1-3, an object of the present invention is to provide a chemical demonstration apparatus, which can accelerate the experiment progress of the activated carbon performance experiment, improve the experiment effect, save the experiment raw materials, and avoid waste.

Chemistry presentation device, including support frame 2 and drying tube 3, above-mentioned drying tube 3 is installed on above-mentioned support frame 2, and the extending direction and the horizontal plane of above-mentioned drying tube 3 intersect, and above-mentioned drying tube 3 below is provided with and is used for collecting the receiving flask 4 of adsorption liquid.

The principle of the utility model is as follows: activated carbon appears often in chemical teaching, the teacher of chemistry at present stage is when showing the performance of activated carbon for the student, the means of adopting usually is in directly placing the activated carbon in test tube or household utensils, leading-in pigmented liquid to test tube or household utensils afterwards, after a period of time of stewing, let the student observe the change of liquid colour, this experimental apparatus is comparatively simple, but the experimental time is long, the experimental effect is slow, in order to guarantee the significance of experimental phenomenon, need put in relatively abundant liquid and activated carbon, and to placing in the activated carbon of test tube or household utensils big, it has been polluted and has not had the way to put back to former splendid attire household utensils, also do not have unnecessary household utensils splendid attire, can only directly abandon after the experiment completion, cause the waste. The embodiment of the utility model provides an in, designed a new presentation device, can effectually utilize the raw and other materials of experiment many times, drying tube 3 is the equipment that is arranged in dry gas or detach impurity in the gas (liquid) in the chemistry experiment. Typically with connectors at both ends for connection to the conduit 18 and a solid desiccant or scavenger in the middle. When the gas (liquid) flows into the drying tube 3 from one end, the impurities of the gas (liquid) are separated from the gas (liquid) due to the chemical reaction between the impurities of the gas (liquid) and the drying agent or the impurity removing agent, and the relatively pure gas (liquid) flows out from the other end. A teacher places active carbon in a drying tube 3 before class, then fixes the drying tube 3 containing the active carbon on a support frame 2, the support frame 2 is provided with a notch, the drying tube 3 is placed in the notch and fixed, when demonstration is needed in the teaching process, a collecting bottle 4 is placed at the lower side of the outlet end of the drying tube 3, liquid with color is slowly poured into the inlet end of the drying tube 3, the liquid with color is adsorbed by the active carbon, flows out from the outlet end of the drying tube 3 and falls into the collecting bottle 4, the operation of the whole experiment is completed, in the operation process, the liquid with color can be slowly put in a small amount, the adsorbed and purified liquid falls into the collecting bottle 4, the adsorption effect of the active carbon can be proved if color changes, the experiment effect can be observed by the small amount of the liquid with color, time is saved, the use amount of the active carbon is prevented from being saved, the residual active carbon which does not lose the effect completely can be reserved in the demonstration device to be used in the next experiment, so that the effect of saving raw materials is achieved, and it is worth explaining that one embodiment of the chemical demonstration device can also be used for demonstrating the performance demonstration experiment of other drying agents or impurity removal agents.

In some embodiments of the present invention, the opening of the drying tube 3 is provided with a rubber plug 5.

In the above embodiment, the rubber plug 5 is a sealing device used in chemical experiments, and is made of rubber, also called a rubber plug, and it is worth explaining that the rubber plug 5 can be used at both ports in the drying tube 3, when the device of an embodiment of the present invention is used for experiments, the rubber plug 5 at the inlet end is firstly opened, the liquid with color is poured in, after standing for a period of time, the rubber plug 5 at the outlet end is opened, the filtered liquid is poured in the collecting bottle 4, and experimental observation is performed; it is also possible to open both rubber stoppers 5 at the beginning of the experiment and then slowly pour the colored liquid into the drying tube 3, where the liquid flows through the drying tube 3 and then directly into the collection bottle 4 below the outlet end of the drying tube 3.

In some embodiments of the present invention, the rubber stopper 5 is a single-hole rubber stopper 6, and the single-hole rubber stopper 6 is provided with an injector 7.

In the above embodiment, the single-hole rubber stopper 6 is the rubber stopper 5 with only one hole formed in the middle of the rubber stopper 5, the rubber stopper 5 can be punched by a puncher, and a glass tube is inserted to form a connecting device, so that gas or liquid in the sealed container can be led out, and the syringe 7 is a common medical appliance. As early as the 15 th century, kathler, italian, proposed the principle of the injector 7. Mainly uses a needle to extract or inject gas or liquid, the embodiment of the utility model is added with an injector 7, before teaching experiment explanation, firstly, the injector 7 is used for extracting experiment liquid, the injector 7 is inserted into the punched hole, when the test is ready to start, the injector 7 is pushed down, and the test liquid with color is injected into the drying tube 3, it is worth mentioning that, when the syringe 7 starts to inject the liquid, the outlet end of the drying tube 3 needs to be opened by the rubber stopper 5, in addition, in the embodiment of the utility model, the testing reagent for the experiment can be colored gas, the injector 7 extracts a part of the colored gas before the experiment, after the experiment is started, the injector 7 is pressed down, the colored gas enters the drying tube 3, the gas that has passed through the adsorbent in the drying tube 3 under the pressure of the injector 7 and finally turned to be colorless is discharged from the outlet end of the drying tube 3.

In some embodiments of the present invention, the supporting frame 2 includes a base 1, the base 1 is provided with a main support 8, and the main support 8 is provided with an adjusting frame 9 in a longitudinal sliding manner.

In the above embodiment, the main support 8 is vertically disposed on the base 1, the main support 8 and the adjusting bracket 9 are connected and fixed by using a cross clamp, and the main support 8 is provided with scale marks, so that the height can be adjusted according to actual experimental conditions.

In some embodiments of the present invention, the drying tube 3 is one of a single-ball drying tube 10 and a double-ball drying tube 11.

In the above embodiment, the single ball drying duct 10 is straight and the ball drying duct 3 is a glass tube having a thick upper part and a thin lower part. The upper opening of the tube is round, which can be used to increase the mechanical strength. The lower part of the thick tube is provided with a bulb for storing the solid desiccant. The lower end of the ball is welded with a section of thin glass tube which is used for filling glass wool and is inserted into a cork to be fixed on a device to be dried. The straight two-ball drying tube 3 is similar to the straight one-ball drying tube 3 in appearance, only a small ball bubble is added on the thick tube, and the two-ball drying tube is mainly used for storing glass wool or alkali stone wool and can also be used for storing different drying agents, so that the absorption effect can be further improved.

In some embodiments of the present invention, the outlet end of the drying pipe 3 is provided with a first control valve 12.

In the above embodiment, the first control valve 12 is a flow control valve, which is also called a 400X flow control valve, and is a multifunctional valve that controls flow by adopting a high-precision pilot manner. The valve is suitable for the pipeline of water distribution pipe which needs to control flow and pressure, keeps the preset flow unchanged, limits the overlarge flow to a preset value, and properly reduces the upstream high pressure, so that the flow of the downstream of the main valve is not influenced even if the pressure of the upstream of the main valve changes. The connection mode is divided into a flange type and a thread type; and (4) welding. The control and regulation modes are automatic and manual. The time of experiment liquid in drying tube 3 can be controlled in the interpolation of first control valve 12 to and the speed and the flow that liquid flows out, and is less when experiment liquid volume, puts into the interior unobvious time of receiving flask 4, can slow down the velocity of flow, directly lets the student observe the liquid that drips.

In some embodiments of the present invention, the outlet end of the drying tube 3 is connected to a burette 13.

In the above embodiment, the burette 13 is the main measuring device for the titration analysis, and can be divided into two types: one is an acid burette 13 and the other is a base burette 13. The lower end of the acid burette 13 is provided with a glass piston which can be filled with acidic or oxidative titration liquid, but can not be filled with alkaline titration liquid, because the alkaline titration liquid can lead the piston to be bonded with a piston sleeve and is difficult to rotate. The basic burette 13 is used for containing alkaline solution, the lower end of the basic burette is connected with a rubber tube, glass beads are placed in the rubber tube to control the solution to flow out, and the lower end of the rubber tube is connected with a sharp-nose glass tube. All solutions capable of reacting with the rubber tube, such as potassium permanganate, iodine and the like, cannot be filled into the basic burette 13, and the burette 13 can directly control the outflow volume of the experimental liquid purified by the drying agent.

The utility model discloses an in some embodiments, including stock solution bottle 14, inlet 15 and liquid outlet 16 have been seted up to above-mentioned stock solution bottle 14, and above-mentioned liquid outlet 16 is connected with water pump 17, and above-mentioned water pump 17 output end is connected with pipe 18, and above-mentioned 18 free ends of pipe are connected with 3 feed liquor ends of above-mentioned drying tube.

In the above-mentioned embodiment, before the experiment, inject the required colored liquid that has of experiment into stock solution bottle 14 through inlet 15, at the in-process of experiment, if need a lot of experiments can extract at any time, and need not all put into experiment liquid before the experiment at every turn, can practice thrift a part work load. In addition, the water pump 17 is added in the embodiment of the utility model, and the water pump 17 is a machine for conveying liquid or pressurizing liquid. The mechanical energy or other external energy of the prime motor is transmitted to the liquid, so that the energy of the liquid is increased, the liquid is mainly used for conveying the liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, the water pump 17 pumps out the liquid in the liquid storage bottle 14, and the liquid flows through the liquid outlet 16 and the conduit 18 and then enters the drying pipe 3 for corresponding experiments.

In some embodiments of the present invention, the conduit 18 is a hose 19, and the hose 19 is provided with a second control valve 20.

In the above embodiment, the hose 19 is most characterized by flexibility, good flexibility, no blocking and stiffness; the weight is light, and the aperture consistency is good; the corrosion resistance and the high temperature resistance are good; the bending resistance, the tensile property and the side pressure resistance are strong; soft and smooth, and easy to thread, install and position. The addition of the hose 19 enriches the way in which the conduit 18 is installed. A second control valve 20 is also provided to further control the flow rate of the liquid.

In some embodiments of the present invention, the collecting bottle 4 is provided with a waste liquid port 21, the waste liquid port 21 is connected to a recycling pipe 22, and a free end of the recycling pipe 22 is connected to the liquid inlet 15.

In the above embodiment, the waste liquid port 21 is provided with a switch valve, after the experiment is completed, the switch valve at the waste liquid port 21 is opened, and the waste liquid flows into the liquid inlet 15 via the recovery pipe 22 and enters the liquid storage bottle 14, so that the waste liquid can be recycled.

To sum up, the utility model provides a chemistry presentation device, it has following beneficial effect at least: activated carbon appears often in chemical teaching, the teacher of chemistry at present stage is when showing the performance of activated carbon for the student, the means of adopting usually is in directly placing the activated carbon in test tube or household utensils, leading-in pigmented liquid to test tube or household utensils afterwards, after a period of time of stewing, let the student observe the change of liquid colour, this experimental apparatus is comparatively simple, but the experimental time is long, the experimental effect is slow, in order to guarantee the significance of experimental phenomenon, need put in relatively abundant liquid and activated carbon, and to placing in the activated carbon of test tube or household utensils big, it has been polluted and has not had the way to put back to former splendid attire household utensils, also do not have unnecessary household utensils splendid attire, can only directly abandon after the experiment completion, cause the waste. The embodiment of the utility model provides an in, designed a new presentation device, can effectually utilize the raw and other materials of experiment many times, drying tube 3 is the equipment that is arranged in dry gas or detach impurity in the gas (liquid) in the chemistry experiment. Typically with connectors at both ends for connection to the conduit 18 and a solid desiccant or scavenger in the middle. When the gas (liquid) flows into the drying tube 3 from one end, the impurities of the gas (liquid) are separated from the gas (liquid) due to the chemical reaction between the impurities of the gas (liquid) and the drying agent or the impurity removing agent, and the relatively pure gas (liquid) flows out from the other end. A teacher places active carbon in a drying tube 3 before class, then fixes the drying tube 3 containing the active carbon on a support frame 2, the support frame 2 is provided with a notch, the drying tube 3 is placed in the notch and fixed, when demonstration is needed in the teaching process, a collecting bottle 4 is placed at the lower side of the outlet end of the drying tube 3, liquid with color is slowly poured into the inlet end of the drying tube 3, the liquid with color is adsorbed by the active carbon, flows out from the outlet end of the drying tube 3 and falls into the collecting bottle 4, the operation of the whole experiment is completed, in the operation process, the liquid with color can be slowly put in a small amount, the adsorbed and purified liquid falls into the collecting bottle 4, the adsorption effect of the active carbon can be proved if color changes, the experiment effect can be observed by the small amount of the liquid with color, time is saved, the use amount of the active carbon is prevented from being saved, the residual active carbon which does not lose the effect completely can be reserved in the demonstration device to be used in the next experiment, so that the effect of saving raw materials is achieved, and it is worth explaining that one embodiment of the chemical demonstration device can also be used for demonstrating the performance demonstration experiment of other drying agents or impurity removal agents.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Chemistry presentation device, its characterized in that, including support frame and drying tube, the drying tube install in on the support frame, just the extending direction and the horizontal plane of drying tube are crossing, the drying tube below is provided with the receiving flask that is used for collecting the adsorption liquid.

2. The chemical demonstration device of claim 1 wherein a rubber plug is provided at the opening of the drying tube.

3. The chemical demonstration device of claim 2 wherein the rubber plug is a single hole rubber plug with a syringe disposed thereon.

4. The chemical demonstration device of claim 1 wherein the support frame comprises a base provided with a main support provided with an adjustment bracket that slides longitudinally.

5. The chemical demonstration device of claim 1 wherein the drying tube is one of a single-bulb drying tube and a double-bulb drying tube.

6. The chemical demonstration device of claim 5 wherein the drying tube outlet end is provided with a first control valve.

7. The chemical demonstration device of claim 5 wherein a burette is connected to the outlet end of the drying tube.

8. The chemical demonstration device of claim 1, comprising a liquid storage bottle, wherein the liquid storage bottle is provided with a liquid inlet and a liquid outlet, the liquid outlet is connected with a water pump, the output end of the water pump is connected with a conduit, and the free end of the conduit is connected with the liquid inlet end of the drying tube.

9. The chemical demonstration device of claim 8 wherein the conduit is a hose, the hose being provided with a second control valve.

10. The chemical demonstration device according to claim 8 wherein the collection bottle is provided with a waste liquid port connected to a recovery tube, the free end of the recovery tube being connected to the liquid inlet.