Integrated experimental device for inspecting multiple properties of gas in batches

Abstract

The utility model relates to an integrated experimental device for inspecting multiple properties of gas in batches, and belongs to the technical field of gas property inspection. The experimental device comprises a test tube rack, three sheep tubules and a rotary chassis, wherein a plurality of small test tubes are rotationally mounted on the outer side of the test tube rack; the three sheep tubules can be mounted in the test tube rack from the top, a plurality of three-way valves are mounted on the three sheep tubules, and the three-way valves are communicated with the small test tubes through rubber tubes; the rotary chassis is mounted at the bottom of the test tube rack. The three-way valves on the three sheep tubules can be connected with two groups of small test tubes at the same time, the gas flow direction is controlled through the three-way valves on the three sheep tubules, the reaction tubules and the property test tubules are fixed through the test tube rack, the device can be conveniently assembled in a laboratory in advance and then carried to a classroom for a demonstration experiment, and the classroom time is saved; meanwhile, the test tube rack can rotate through the bottom rotating chassis, so that students can conveniently observe various properties of the gas step by step, and disorder caused by simultaneous inspection of multiple properties and mutual reaction interference among substances are avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of gas property testing, in particular to an experimental device for integrally testing multiple properties of gas in batches. BACKGROUND

[0002] In high school chemistry teaching, the preparation and property testing experiments of toxic gases such as chlorine, sulfur dioxide and ammonia are usually simple. The experimental device design about these gases in the People's Education Press (PEP) teaching material is relatively basic, and the main reasons are as follows: 1. Safety problem: these gases are toxic, and related experiments are usually avoided in teaching; 2. Experimental complexity: gas property testing involves multiple experimental steps, and the instrument is complex to assemble and consumes a lot of classroom time; 3. Gas tightness problem: the traditional device has poor gas tightness, which may cause toxic gas leakage and environmental pollution; 4. Portability problem: the traditional device is large in size and is not convenient to carry to the classroom for demonstration experiments.

[0003] Chlorine, sulfur dioxide and ammonia have multiple properties, and when exploring their multiple properties, the traditional experimental device will face problems such as complex instrument assembly, time-consuming operation and so on. The latest simple device on the market is not conducive to liquid loading, cleaning and observation, etc., cannot test multiple properties in one device at a time, cannot exclude the mutual influence between substances, and cannot observe multiple experimental phenomena at a time. Experimental phenomena are fleeting, and students have to choose one over the other, which is not conducive to the principle of gradual progress in classroom teaching.

[0004] Therefore, in order to improve this phenomenon, the application provides an experimental device for integrally testing multiple properties of gas in batches. CONTENT OF THE INVENTION

[0005] Therefore, the application provides an experimental device for integrally testing multiple properties of gas in batches, which solves the problems of not being suitable for liquid loading, cleaning and observation, etc.

[0006] The application provides an experimental device for integrally testing multiple properties of gas in batches, which comprises:

[0007] A test tube rack is rotatably installed on the outer side of the test tube rack.

[0008] A three-goat test tube can be installed from the top into the test tube rack, and a plurality of three-way valves are installed on the three-goat test tube, and the three-way valves are communicated with a plurality of small test tubes through rubber pipes.

[0009] A rotating base is installed at the bottom of the test tube rack.

[0010] The three-way valve on the three-goat small tube can be connected with two groups of small test tubes at the same time, each small test tube is fixed on the test tube rack, the gas flow is controlled through the three-way valve on the three-goat small tube, the reaction small tube and the property test small tube are fixed through the test tube rack, the device can be assembled in the laboratory in advance and then carried to the classroom for demonstration experiment, so that the classroom time is saved, meanwhile, the test tube rack can be rotated through the bottom rotating disc, so that students can observe the properties of the gas step by step, and the confusion when multiple properties are tested at the same time and the interference between substances are avoided, and the integrated device is small in size and saves reagents.

[0011] Preferably, a partition plate is arranged in the middle of the test tube rack, and the test tube rack is divided into an upper cavity and a lower cavity through the partition plate.

[0012] Preferably, the upper cavity and the lower cavity are two-side-opened along the partition plate, or one-side-opened along the partition plate.

[0013] Preferably, a lower test tube hole is arranged at the middle position of the partition plate, and the lower test tube hole is located directly below the test tube hole, and the bottom of the three-goat small tube can be placed in the lower test tube hole after being penetrated from the test tube hole.

[0014] Preferably, the position where the inner side of the test tube hole contacts the three-goat small tube is provided with rubber.

[0015] Preferably, the position where the lower test tube hole contacts the three-goat small tube is provided with rubber.

[0016] Preferably, the outer side of the three-goat small tube is provided with three groups of three-way valves, one end of the three-way valve is communicated with the three-goat small tube, and the other two ends are communicated with the small test tubes on the same side through rubber tubes.

[0017] Preferably, the three groups of three-way valves are distributed equidistantly on the outside of the three-goat small tube.

[0018] Preferably, six groups of small test tubes are arranged, and the six groups of small test tubes are installed on the outer side of the test tube rack through the rubber tube, and the six groups of small test tubes are provided with rotating spaces between each other.

[0019] Preferably, a balloon is installed on each small test tube.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The present application has the effects of integrity and portability: the six-rib test tube rack fixes the reaction device (i.e. the three-goat small tube) and the property test device (i.e. the small test tube), which is convenient for assembling the device in the laboratory in advance and then carrying it to the classroom for demonstration experiment, so that the classroom time is saved;

[0022] 2. The application has the effect of miniaturization: the three-goat small tube and the small test tube are placed on the test tube rack, the integrated design has the effect of small volume and easy observation, and the reagent can be saved and the experimental cost can be saved;

[0023] 3. The application has the effect of step-by-step observation: each small test tube is fixed on each face of the six-sided test tube rack, the gas flow is controlled through the three-way valve on the three-goat small tube, which facilitates students to observe the properties of the gas step by step, avoids confusion when multiple properties are tested at the same time, and avoids interference between substances, and the experiment has high precision and safety;

[0024] 4. The application adopts transparent design: the six-sided test tube rack is hollow designed, which is convenient for observing the experimental phenomena in the reaction container and the small test tube;

[0025] 5. The application is efficient and environmentally friendly: the experimental operation is simple, the phenomenon is obvious, the time consumption is short, the reagent consumption is small, and the whole process is carried out in a closed system without pollution;

[0026] 6. The application has multifunctionality: the device is not only suitable for teacher demonstration experiment, but also can be used for student group experiment, and is suitable for preparation and property testing of various toxic gases;

[0027] 7. The application is easy to wash and liquid injection: the three-goat small tube, the small test tube, the test tube rack and the rotating bottom plate and the like structure are detachably installed, which is easy to split, and is beneficial to the dropping of reagent and the washing of instrument. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the application or the prior art. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0029] Figure 1 The structure diagram of the experimental device for batch-by-batch testing of multiple properties of gas of the application;

[0030] Figure 2 The structure diagram of the test tube rack of the application;

[0031] Figure 3 The structure diagram of the three-goat small tube of the application.

[0032] Explanation of the drawings:

[0033] 1. Three-goat small tube;

[0034] 101. Three-way valve;

[0035] 2. Test tube rack;

[0036] 201, lower cavity; 202, partition; 203, upper cavity; 204, rubber tube; 205, rubber skin; 206, test tube hole;

[0037] 3, rotating base plate;

[0038] 4, rubber tube;

[0039] 5, small test tube;

[0040] 501, balloon. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0042] Firstly, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0043] Secondly, it should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and other terms indicating the direction or position relationship are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] Embodiment 1

[0045] Referring to Figure 1 The embodiment of the present application provides an experimental device for integrated batch testing of multiple properties of gas, which comprises three goat test tubes 1, a test tube rack 2, a rotating base plate 3, a rubber tube 4 and a small test tube 5, and their positional relationship is as follows: the rotating base plate 3 is installed at the bottom of the test tube rack 2, the test tube rack 2 can rotate relative to the rotating base plate 3, the three goat test tubes 1 are loaded into the test tube rack 2 from the top of the test tube rack 2; the small test tube 5 is detachably installed on the outside of the test tube rack 2 through the rubber tube 204, and the three goat test tubes 1 and the small test tube 5 are communicated through the rubber tube 4.

[0046] Referring to Figure 3The top of the three-goat small tube 1 is provided with a plug, and in the subsequent experimental process, a syringe can be inserted into the three-goat small tube 1 from the plug. Three sets of three-way valves 101 are installed at equal intervals on the outer side of the three-goat small tube 1 close to the top. One of the openings of the three-way valve 101 communicates with the three-goat small tube 1, and the other two openings are respectively connected to the small test tubes 5 located on the same side through rubber tubes 4.

[0047] It should be noted that, as shown in Figure 1 , an outlet (not shown in the figure) is arranged on the three-goat small tube 1 close to the port and above the three-way valve 101. The outlet is used to connect a balloon to prevent the device from having excessive pressure and to use the contained lime for tail gas treatment.

[0048] Referring to Figure 2 , the test tube rack 2 is in the shape of a hexagonal prism or other cylindrical and columnar shapes, and is hollow inside. A partition plate 202 is arranged in the middle, and the test tube rack 2 can be divided into an upper cavity 203 and a lower cavity 201 by the partition plate 202. It should be noted that the upper cavity 203 and the lower cavity 201 can be through along the direction of the partition plate 202, so that the upper cavity 203 and the lower cavity 201 are open on both sides, which is convenient for students to observe from both sides. Or it is open on one side along the partition plate 202. The present application does not limit the opening setting, but only gives two selection methods, of which the two-side opening is the most preferred.

[0049] Specifically, the partition plate 202 is horizontally arranged and parallel to the rotating base 3. The upper cavity 203 is used to place the three-goat small tube 1, and the lower cavity 201 can be used to store alcohol lamps. During the experiment, if it is necessary to heat the small test tubes 5, the alcohol lamp can be taken out and placed above the rotating base 3. By slightly adjusting the angle of the small test tubes 5, the bottom of the small test tubes 5 can be in contact with the alcohol lamp flame.

[0050] Specifically, a test tube hole 206 is arranged at the middle position of the top of the test tube rack 2. The three-goat small tube 1 can enter the upper cavity 203 from the test tube hole 206, and rubber can be arranged on the inner side of the test tube hole 206 to protect the three-goat small tube 1 entering the test tube hole 206.

[0051] Specifically, a lower test tube hole is arranged at the middle position of the partition plate 202 and directly below the test tube hole 206, and a rubber skin 205 is arranged on the lower test tube hole. The bottom of the three-goat small tube 1 entering the upper cavity 203 can be placed on the rubber skin 205, which can support and protect the three-goat small tube 1.

[0052] Exemplarily, six 45-degree inclined rubber-coated clamping tubes 204 are mounted on the outer side of the test tube rack 2, and each rubber-coated clamping tube 204 is clamped with a small test tube 5. Adjacent small test tubes 5 have a rotating gap to avoid touching each other during rotation. The inner part of the rubber-coated clamping tube 204 is provided with rubber at the position in contact with the small test tube 5 for protecting the small test tube. The small test tube 5 can rotate in the corresponding rubber-coated clamping tube 204, so that it can contact the alcohol lamp located on the top of the rotating base 3.

[0053] Referring to Figure 1 and Figure 2 , the top plate of the rotating base 3 directly contacts the test tube rack 2, and the bottom is a rotating part. The top plate can drive the test tube rack 2 to rotate relative to the rotating part, which is convenient for students to observe each small test tube during the experiment.

[0054] Referring to Figure 1 , a balloon 501 is mounted on each small test tube 5 for subsequent experiment of loading soda lime.

[0055] Embodiment 2

[0056] This embodiment is aimed at the experimental device for integrated batch testing of multiple properties of gas according to the present application. The experimental steps are as follows:

[0057] 1. Experimental instruments: three sheep test tubes 1, six-edge test tube rack 2, small test tubes 5, rubber tubes 4, syringes, inflators, alcohol lamps, and rotatable bases 3.

[0058] 2. Three kinds of experimental reagents required for experiments:

[0059] Experimental reagents required for experiments on sulfur dioxide: concentrated sulfuric acid, sodium sulfite, purple litmus solution, magenta solution, acidic KMnO4 solution, sodium sulfide solution, barium chloride solution, sodium hydroxide solution, and soda lime.

[0060] Experimental reagents required for experiments on chlorine gas: potassium permanganate, concentrated hydrochloric acid, fresh flowers, red paper, solution with purple litmus, sodium hydroxide solution with phenolphthalein, sodium sulfide solution, and ferrous chloride solution.

[0061] Experimental reagents required for experiments on ammonia gas: concentrated ammonia water, manganese dioxide, water solution with phenolphthalein, copper sulfate solution, concentrated hydrochloric acid, and copper oxide solid.

[0062] 3. Experimental steps, phenomena, and conclusions; the present application is applicable to all gases with multiple properties such as chlorine gas, ammonia gas, and sulfur dioxide. Taking the testing of sulfur dioxide as an example:

[0063] ①Preparation: a little lime in the balloon 501, used to absorb excess sulfur dioxide, while preventing the pressure in the small tube 1 reactor too large; connected to the device, check the air tightness; 5 g of Na2SO3 powder in the small tube 1, respectively, 1 ml of purple litmus solution, 1 ml of acid potassium permanganate solution, 1 ml of magenta solution, 1 ml of sodium sulfide solution, 1 ml of barium chloride solution, 1 ml of barium chloride and sodium hydroxide mixed solution into six groups of small test tube 5, syringe suction good H2SO4 inserted into the rubber plug, and then the rubber plug in the top of the small tube 1; so as to carry on six groups of experiments, respectively, the six groups in the table below.

[0064] ②Start experiment: push the syringe, about 15 ml and 70% of concentrated H2SO4 push into the small tube 1 after observation.

[0065] ③Experimental phenomena and conclusions:

[0066]

[0067] ④Notes: the rate of concentrated sulfuric acid drop is not too fast. The concentration of magenta solution is not too large, through the experiment, found that 0.1% of the magenta solution is more appropriate.

[0068] During the experiment, students can manually rotate the test tube rack 2, so that the test tube rack 2 rotates, students do not need to walk back and forth to observe the changes in the solution in each small test tube 5.

[0069] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, rather than limit them; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated experimental apparatus for batch testing of multiple properties of gases, characterized in that, include: Test tube rack (2), with several small test tubes (5) rotatably mounted on its outer side; The three-sheep tube (1) can be installed from the top into the test tube rack (2). Several three-way valves (101) are installed on the three-sheep tube (1). The three-way valves (101) are connected to several small test tubes (5) through rubber tubes (4). The rotating base (3) is installed at the bottom of the test tube rack (2).

2. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 1, characterized in that, The test tube rack (2) is provided with a partition (202) in the middle, and is divided into an upper cavity (203) and a lower cavity (201) by the partition (202). The upper cavity (203) is connected to the test tube hole (206) opened at the top of the test tube rack (2).

3. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 2, characterized in that, The upper cavity (203) and the lower cavity (201) can be connected through the partition (202) to form openings on both sides, or to form an opening on one side along the partition (202).

4. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 2, characterized in that, The partition (202) has a lower test tube hole in the middle position. The lower test tube hole is located directly below the test tube hole (206). The bottom of the three sheep tube (1) can pass through the test tube hole (206) and be placed in the lower test tube hole.

5. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 4, characterized in that, Rubber is provided on the inner side of the test tube hole (206) where it contacts the three sheep tube (1).

6. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 4, characterized in that, A rubber sheet (205) is provided at the position where the lower test tube hole contacts the three-sheep tube.

7. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 1, characterized in that, The outer side of the three-sheep tube (1) is provided with three sets of three-way valves (101). One end of the three-way valve (101) is connected to the three-sheep tube (1), and the other two ends are connected to the small test tube (5) located on the same side through the rubber tube (4).

8. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 7, characterized in that, The three sets of three-way valves (101) are evenly distributed on the outside of the three-way tube (1).

9. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 7, characterized in that, There are six sets of small test tubes (5), all of which are installed on the outside of the test tube rack (2) by rubber-coated tube clips (204), and there is rotation space between each pair of the six sets of small test tubes (5).

10. The integrated experimental apparatus for batch testing of multiple properties of gases according to claim 1, characterized in that, Each of the small test tubes (5) is equipped with a balloon (501).

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