Demonstration teaching aid for hydrogen chemical property teaching

Abstract

The utility model discloses a demonstration teaching aid for hydrogen chemical property teaching, and relates to the technical field of demonstration teaching aids. Comprising a display support, a Kipp generator is arranged on the side face of the display support, a limiting plate is fixedly connected to the top of the display support, a positioning plate is attached to the side face of the limiting plate, a positioning groove is formed in the side face of the positioning plate, and a sealing block, a first base and a second base are clamped in the positioning groove; the upper end of the first base is fixedly connected with a stainless steel sharp nozzle; the two positioning plates are spliced and combined at the top of the display support, the sealing block, the first base and the second base are clamped and fixed, the sealing block, the first base and the second base are matched in a grouping mode, and the T-shaped guide pipe and the rubber pipe are combined and connected. The teaching aid can carry out various teaching experiments such as a combustion test, a collection test and a copper oxide reduction test, so that the flexibility of hydrogen chemical property teaching demonstration in a classroom is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of demonstration teaching aids, in particular to a demonstration teaching aid for teaching the chemical properties of hydrogen. Background Art

[0002] Hydrogen is the lightest known gas in the world. Its density is extremely low, only 1 / 14 of that of air. At standard atmospheric pressure and 0°C, the density of hydrogen is 0.0899 g / L. Hydrogen production and application are widely used in the chemical industry, so demonstrating the properties of hydrogen is an important part of chemistry instruction.

[0003] In the prior art, in chemistry teaching, demonstrations of hydrogen-related properties include various experiments such as hydrogen combustion and hydrogen reduction of copper oxide. Common experimental methods often use a combination of various experimental instruments such as test tubes and alcohol lamps for demonstration, which requires a large amount of instruments. Demonstrations in the classroom require the carrying of multiple instruments, making teaching demonstrations inconvenient and inflexible. Utility Model Content

[0004] The utility model provides a demonstration teaching aid for teaching the chemical properties of hydrogen, so as to solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a demonstration teaching aid for teaching the chemical properties of hydrogen, comprising a display stand, a Kipp generator being provided on the side of the display stand;

[0006] The top of the display stand is fixedly connected to a limit plate, a positioning plate is attached to the side of the limit plate, a positioning groove is formed on the side of the positioning plate, a sealing block, a first base and a second base are clamped in the positioning groove, a stainless steel nozzle is fixedly connected to the upper end of the first base, a spiral copper wire is embedded in the outside of the stainless steel nozzle, an experimental test tube is embedded in the outside of the first base, a test tube pad is clamped at the opening of the experimental test tube, and a glass tube is inserted into the interior of the second base;

[0007] An air guide tube is provided at the output end of the Kipp generator, and the end of the air guide tube is connected to a T-shaped catheter via a rubber tube, and a water stop clamp is clamped on the outside of the rubber tube.

[0008] Furthermore, the limiting plate is arranged in an L shape, and two limiting plates are provided, and the two limiting plates are symmetrically arranged on the front and rear sides of the display bracket.

[0009] Furthermore, two positioning plates are symmetrically arranged front to back, and the two positioning plates are tightly fitted between the two limiting plates.

[0010] Furthermore, the positioning groove is configured to be semicircular, and the positioning groove is opened on the opposite surfaces of the two positioning plates. There are at least three groups of positioning grooves arranged opposite to each other, and the sealing block, the first base and the second base are respectively clamped between each group of positioning grooves.

[0011] Furthermore, the first base and the second base are both hollowed out, the stainless steel nozzle is connected to the T-shaped tube through the first base, and the glass tube passes through the second base and extends to the bottom of the limit plate and is connected to the T-shaped tube through a rubber tube.

[0012] Furthermore, a paddle is embedded in the lower surface of the test tube pad, one end of the paddle extends to the outside of the test tube pad, and the test tube pad and the paddle are connected via a damping shaft.

[0013] Compared with the prior art, the present invention provides a demonstration teaching aid for teaching the chemical properties of hydrogen, which has the following beneficial effects:

[0014] This hydrogen chemical properties teaching demonstration aid comprises two positioning plates spliced ​​and assembled on the top of a display stand, which clamp and fix a sealing block, a first base, and a second base. By grouping and coordinating the sealing block, the first base, and the second base, and connecting them with a T-shaped conduit and a rubber tube, the aid can be used for various teaching experiments, such as a combustion test, a collection test, and a copper oxide reduction test, thereby improving the flexibility of hydrogen chemical properties teaching demonstrations in the classroom. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the positioning plate structure of the utility model;

[0017] In the figure: 1. Display bracket; 11. Limit plate; 12. Positioning plate; 13. Positioning groove; 14. Sealing block; 15. First base; 16. Second base; 17. Stainless steel nozzle; 18. Spiral copper wire; 19. Experimental test tube; 110. Test tube pad; 11001. Pick; 111. Glass catheter; 2. Kipp generator; 21. Air guide tube; 22. Rubber tube; 23. T-shaped catheter; 24. Water stop clamp. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-2 The present invention discloses a demonstration teaching aid for teaching the chemical properties of hydrogen, comprising a display stand 1, a Kipp generator 2 being arranged on the side of the display stand 1; a limit plate 11 being fixedly connected to the top of the display stand 1, a positioning plate 12 being attached to the side of the limit plate 11, a positioning groove 13 being provided on the side of the positioning plate 12, a sealing block 14, a first base 15 and a second base 16 being clamped in the positioning groove 13, a stainless steel nozzle 17 being fixedly connected to the upper end of the first base 15, a spiral copper wire 18 being nested on the outside of the stainless steel nozzle 17, an experimental test tube 19 being nested on the outside of the first base 15, a test tube pad 110 being clamped at the opening of the experimental test tube 19, a glass tube 111 being inserted into the interior of the second base 16; an air guide tube 21 being provided at the output end of the Kipp generator 2, the end of the air guide tube 21 being connected to a T-shaped tube 23 through a rubber tube 22, the outer portion of the rubber tube 22 being clamped with a water stop clamp 24.

[0020] Specifically, the limiting plate 11 is arranged in an L shape, and there are two limiting plates 11, which are symmetrically arranged on the front and back sides of the display bracket 1; the positioning plates 12 are symmetrically arranged on the front and back sides, and the two positioning plates 12 are tightly fitted between the two limiting plates 11.

[0021] In this embodiment, two positioning plates 12 are assembled to form the desktop structure of the demonstration teaching aid. The assembled positioning plates 12 are limited by the limiting plates 11 on the front and rear sides. The positioning plates 12 can slide off from between the limiting plates 11 on the left and right sides, making it easy to disassemble and assemble.

[0022] Specifically, the positioning groove 13 is set to be semicircular, and the positioning groove 13 is opened on the opposite surfaces of the two positioning plates 12. There are at least three groups of the positioning grooves 13 arranged opposite to each other, and the sealing block 14, the first base 15 and the second base 16 are respectively clamped between each group of positioning grooves 13.

[0023] In this embodiment, the positioning plate 12 is clamped on the outside of the sealing block 14 , the first base 15 and the second base 16 by splicing, thereby fixing the sealing block 14 , the first base 15 or the second base 16 .

[0024] Specifically, the first base 15 and the second base 16 are both hollowed out, the stainless steel nozzle 17 is connected to the T-shaped tube 23 through the first base 15, and the glass tube 111 passes through the second base 16 and extends to the bottom of the limit plate 11 and is connected to the T-shaped tube 23 through the rubber tube 22.

[0025] In this embodiment, the arrangement of the T-shaped tube 23 and the rubber tube 22 serves to connect the first base 15, the second base 16 and the Kipp generator 2 in combination. The output end of the Kipp generator 2 is connected to one end of the T-shaped tube 23 through the air guide tube 21 and the rubber tube 22, thereby connecting to the stainless steel nozzle 17 at the upper end of the T-shaped tube 23. The other end of the T-shaped tube 23 is connected to the glass tube 111 through another rubber tube 22. The outside of the above-mentioned rubber tubes 22 are all clamped with water stop clamps 24, which play a control role in the on-off of the connecting parts of various parts of the air guide passage.

[0026] Specifically, a paddle 11001 is embedded in the lower surface of the test tube pad 110 , one end of the paddle 11001 extends to the outside of the test tube pad 110 , and the test tube pad 110 and the paddle 11001 are connected via a damping shaft.

[0027] In this embodiment, the experimental test tube 19 is inverted on the outside of the first base 15. When the pick 11001 is attached to the bottom of the test tube pad 110, the test tube pad 110 is completely attached to the surface of the positioning plate 12. When the pick 11001 is turned outward, one end of the test tube pad 110 is propped up, forming a gap between the experimental test tube 19 and the positioning plate 12.

[0028] When in use, the first base 15 is clamped in the positioning groove 13 on the leftmost side of the positioning plate 12, the second base 16 is clamped in the positioning groove 13 on the rightmost side, and the sealing block 14 is clamped in the remaining positioning grooves 13. Another positioning plate 12 is spliced ​​on the side of the positioning plate 12 so that the positioning grooves 13 on the two positioning plates 12 are opposite to each other. The assembled positioning plate 12 is slid from the left or right side of the display bracket 1 between the two limit plates 11 and supported by the display bracket 1. The Kipp generator 2 is placed on the left side of the display bracket 1. The air guide tube 21 is connected to the left port of the T-shaped tube 23 through a rubber tube 22. The right port of the T-shaped tube 23 is connected to the glass tube 111 through another rubber tube 22. A water stop clamp 24 is clamped on each of the two rubber tubes 22. The left side of the two water stop clamps 24 is marked as K1 and the right side is marked as K2.

[0029] ① When conducting a hydrogen combustion experiment: remove K1, and let the Kipp generator 2 output hydrogen. The hydrogen is passed into the stainless steel tip 17 through the T-shaped conduit 23 and is led out from the stainless steel tip 17. Introduce a fire source at the outlet of the stainless steel tip 17, ignite the hydrogen, and observe the color of the flame;

[0030] At the same time, as a combustion control experiment: during the assembly process, N first bases 15 and two second bases 16 are installed to form N groups of control experimental structures. At the same time, each group of first bases 15 and second bases 16 is connected to a Kipp generator 2. By diluting the reagent in each Kipp generator 2 with different amounts of sulfuric acid, different colors of flames are formed at the opening of the stainless steel tip 17.

[0031] ② When conducting a hydrogen reduction copper oxide experiment: clamp the spiral copper wire 18 with a crucible clamp and ablate and heat it with an alcohol lamp to form copper oxide on the surface of the copper wire. The oxidized spiral copper wire 18 is nested outside the stainless steel tip 17. After turning the pick 11001 outside, the experimental test tube 19 is buckled outside the stainless steel tip 17. After hydrogen is passed into the stainless steel tip 17, the black copper oxide on the surface of the spiral copper wire 18 is observed to change in color to copper red;

[0032] In addition, the hydrogen gas drawn out through the glass conduit 111 can also be subjected to a purity test.

[0033] In summary, the demonstration teaching aid for teaching the chemical properties of hydrogen is provided with two positioning plates 12 that are spliced ​​and assembled on the top of the display bracket 1, which clamps and fixes the sealing block 14, the first base 15 and the second base 16. Through the grouping and coordination of the sealing block 14, the first base 15 and the second base 16, and the combined connection of the T-shaped conduit 23 and the rubber tube 22, the teaching aid can be used to carry out various teaching experiments such as combustion test, collection test and copper oxide reduction test, thereby improving the flexibility of teaching demonstrations of the chemical properties of hydrogen in the classroom.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A teaching aid for demonstrating the chemical properties of hydrogen, comprising a display stand (1), characterized in that: A Kipp generator (2) is provided on the side of the display stand (1); The top of the display bracket (1) is fixedly connected to a limit plate (11), a positioning plate (12) is attached to the side of the limit plate (11), a positioning groove (13) is provided on the side of the positioning plate (12), a sealing block (14), a first base (15) and a second base (16) are clamped in the positioning groove (13), a stainless steel tip (17) is fixedly connected to the upper end of the first base (15), a spiral copper wire (18) is embedded in the outside of the stainless steel tip (17), an experimental test tube (19) is embedded in the outside of the first base (15), a test tube pad (110) is clamped at the opening of the experimental test tube (19), and a glass tube (111) is inserted into the inside of the second base (16); An air guide tube (21) is provided at the output end of the Kipp generator (2), and the end of the air guide tube (21) is connected to a T-shaped conduit (23) via a rubber tube (22), and a water stop clamp (24) is provided on the outside of the rubber tube (22).

2. A demonstration teaching aid for teaching the chemical properties of hydrogen according to claim 1, characterized in that: The limiting plate (11) is arranged in an L-shape, and two limiting plates (11) are provided. The two limiting plates (11) are symmetrically arranged on the front and rear sides of the display bracket (1).

3. A demonstration teaching aid for teaching the chemical properties of hydrogen according to claim 2, characterized in that: Two positioning plates (12) are symmetrically arranged front and back, and the two positioning plates (12) are tightly fitted between the two limiting plates (11).

4. The hydrogen chemical properties teaching demonstration aid according to claim 1, characterized in that: The positioning groove (13) is configured to be semicircular. The positioning groove (13) is provided on opposite surfaces of the two positioning plates (12). There are at least three groups of the positioning grooves (13) arranged opposite to each other. The sealing block (14), the first base (15) and the second base (16) are respectively clamped and arranged between the positioning grooves (13) of each group.

5. The teaching aid for demonstrating the chemical properties of hydrogen according to claim 1, characterized in that: The first base (15) and the second base (16) are both configured to be hollow, the stainless steel tip (17) is connected to the T-shaped conduit (23) via the first base (15), and the glass conduit (111) passes through the second base (16), extends to below the limit plate (11), and is connected to the T-shaped conduit (23) via a rubber tube (22).

6. The teaching aid for demonstrating the chemical properties of hydrogen according to claim 1, characterized in that: A paddle (11001) is embedded in the lower surface of the test tube pad (110), one end of the paddle (11001) extends to the outside of the test tube pad (110), and the test tube pad (110) and the paddle (11001) are connected via a damping shaft.

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