Teaching aid for verifying combustion condition and mass conservation

Abstract

The utility model relates to the technical field of teaching aids, in particular to a teaching aid for verifying combustion conditions and mass conservation, which comprises a frame body comprising an electronic scale; the experiment mechanism comprises an electric heating cup, and the electric heating cup is arranged on the upper surface of the tray; the clamping mechanism comprises a supporting frame, and the supporting frame is fixedly connected to the surface of the electronic scale. According to the experimental device, the plug and the test tube are connected in an inserted mode, the balloon, the iron wire and the plug are connected in an inserted mode, and the two ends of the rubber hose are connected with the test tube and the injector in an inserted mode respectively, so that the combustion condition and the mass conservation experiment can be conducted at the same time, and great convenience is brought to operation of people; the two ends of the first spring are fixedly connected with the first bolt and the first gasket, the first clamping plate is movably connected with the second clamping plate, the second bolt is movably connected with the first clamping plate and the second clamping plate, and the second bolt is in threaded connection with the nut, so that the test tube can be fixedly clamped at different heights.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching aids, in particular to a teaching aid for verifying combustion conditions and mass conservation. Background Art

[0002] Teaching aids are physical objects whose purpose is to spread science and technology and educate people. They are complete scientific and technological media and indispensable equipment in youth science and technology activities.

[0003] Chemistry is one of the important basic sciences. As a compulsory subject for students, it plays an important role in life and technological development. Experiments are an important means of learning chemistry. Among them, verifying combustion conditions and mass conservation is an extremely important one among many chemical experiments. It needs to be used frequently. However, when doing experiments to verify combustion conditions and mass conservation, we can only follow the experimental steps step by step, which is not only cumbersome but also a waste of time. At the same time, when doing experiments, we need to manually hold the test tube with a clamp, which poses a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to provide a teaching aid for verifying combustion conditions and mass conservation, so as to solve the problem in the above-mentioned background technology that the experiment can only be carried out step by step according to the experimental steps and that the test tube needs to be clamped manually with a handheld clamp when doing the experiment, which poses a safety hazard.

[0005] To achieve the above purpose, the utility model provides the following technical solution, a teaching aid for verifying combustion conditions and mass conservation, comprising:

[0006] The frame includes an electronic scale, the lower surface of the electronic scale is fixedly connected to a support leg, and the upper surface of the electronic scale is fixedly connected to a tray;

[0007] The experimental mechanism comprises an electric heating cup, which is arranged on the upper surface of a tray, wherein a test tube and a temperature sensor are arranged inside the electric heating cup, wherein a plug is plugged and connected to the upper end of the test tube, a balloon is plugged and connected to the surface of the plug, an iron wire is plugged and connected to the surface of the plug, a digital thermometer is fixedly connected to the upper end of the temperature sensor, a rubber hose is plugged and connected to the surface of the test tube, and a syringe is plugged and connected to the end of the rubber hose away from the test tube;

[0008] The clamping mechanism includes a supporting frame, which is fixedly connected to the surface of the electronic scale. The surface of the supporting frame is sleeved with a connecting ring, the surface of the connecting ring is threadedly connected with a first bolt, the surface of the first bolt is fixedly connected with a first spring, the end of the first spring away from the first bolt is movably connected with a first gasket, the surface of the connecting ring is fixedly connected with a connecting rod, the end of the connecting rod away from the connecting ring is fixedly connected with a first clamping plate, the surface of the first clamping plate is movably connected with a second clamping plate, the surface of the first clamping plate is movably connected with a second bolt, the surface of the second bolt is threadedly connected with a nut, the surface of the second bolt is sleeved with a second spring, and the surface of the second spring is fixedly connected with a second gasket.

[0009] Preferably, the supporting legs are cylindrical in shape and the tray is plate-shaped.

[0010] Preferably, the test tubes and the stoppers are in three groups, the test tubes are hollow inside, the stoppers are in a truncated cone shape, and the balloons are in two groups.

[0011] Preferably, the temperature sensor is in the shape of an elongated strip, the rubber hose and the syringe are in two groups, the rubber hose is hollow inside, and the two ends of the rubber hose are respectively plugged and connected to the surface of the test tube and the syringe.

[0012] Preferably, the connecting ring is ring-shaped, and the connecting ring is in four groups, and the first gasket acts on the surface of the support frame through the connecting ring, the first bolt and the first spring.

[0013] Preferably, the connecting rod is in the shape of a round rod, and the nut consists of three parts, one part of the nut is in the shape of a cylinder, and the other two parts of the nut are both in the shape of a round rod.

[0014] Preferably, the second gasket is in the shape of a circular ring, and the first clamping plate and the second clamping plate act on the surface of the test tube through the second bolt, the nut, the second spring and the second gasket.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. By setting the electric heating cup on the surface of the electronic scale, the change of the experimental mass can be observed at any time to achieve the purpose of verifying the conservation of mass. By placing the temperature sensor and the digital thermometer inside the electric heating cup, the change of the experimental temperature can be observed at any time to achieve the purpose of measuring the ignition point of white phosphorus. Through the plug-in connection between the plug and the test tube, the plug-in connection between the balloon, the iron wire and the plug, and the plug-in connection between the two ends of the rubber hose and the test tube and the syringe respectively, the combustion condition and the conservation of mass experiment can be carried out simultaneously, which greatly facilitates people's operation.

[0017] 2. The support frame and the connecting ring can be fixed by the threaded connection between the connecting ring and the first bolt, and the fixed connection between the two ends of the first spring and the first bolt and the first gasket, so that the test tube can be fixed at different heights. The first clamping plate and the second clamping plate are connected flexibly, the second bolt and the first clamping plate and the second clamping plate are connected flexibly, and the second bolt and the nut are connected flexibly. As the nut rotates, the first clamping plate and the second clamping plate are gradually compressed to clamp the test tube. The second spring, the second gasket and the second bolt are connected flexibly, and as the nut rotates in the opposite direction, the first clamping plate and the second clamping plate are separated by the force of the second spring, so as to achieve the purpose of loosening the test tube, and the test tube can be fixedly clamped at different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view stereoscopic schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a bottom-up stereoscopic schematic diagram of the structure of the utility model;

[0020] Figure 3 It is a schematic diagram of a three-dimensional partial cross-section of the structure of the electric heating cup of the utility model;

[0021] Figure 4 It is a partial three-dimensional structural schematic diagram of the support frame of the utility model;

[0022] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 6 For this utility model Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0024] In the figure: 1. electronic scale; 11. supporting leg; 12. tray; 2. electric heating cup; 21. test tube; 22. stopper; 23. balloon; 24. iron wire; 25. temperature sensor; 26. digital thermometer; 27. rubber hose; 28. syringe; 3. supporting frame; 31. connecting ring; 32. first bolt; 33. first spring; 34. first gasket; 35. connecting rod; 36. first clamp; 37. second clamp; 38. second bolt; 39. nut; 310. second spring; 311. second gasket. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-6 , an embodiment provided by the utility model:

[0027] A teaching aid for verifying combustion conditions and mass conservation, comprising:

[0028] The frame includes an electronic scale 1, a support leg 11 is fixedly connected to the lower surface of the electronic scale 1, and the support leg 11 plays a supporting role for the electronic scale 1, and a tray 12 is fixedly connected to the upper surface of the electronic scale 1;

[0029] The experimental mechanism includes an electric heating cup 2, which is arranged on the upper surface of a tray 12. A test tube 21 and a temperature sensor 25 are arranged inside the electric heating cup 2. The test tube 21 and the temperature sensor 25 are suspended for experiments. A plug 22 is plugged and connected to the upper end of the test tube 21. The plug 22 seals the test tube 21. A balloon 23 is plugged and connected to the surface of the plug 22. The balloon 23 is used to prevent gas leakage during the experiment. An iron wire 24 is plugged and connected to the surface of the plug 22. The iron wire 24 has two functions, one is to fix red phosphorus and white phosphorus, and the other is to react with a CuSO4 solution. A digital thermometer 26 is fixedly connected to the upper end of the temperature sensor 25. A rubber hose 27 is plugged and connected to the surface of the test tube 21. A syringe 28 is plugged and connected to the end of the rubber hose 27 away from the test tube 21.

[0030] The clamping mechanism includes a support frame 3, which is fixedly connected to the surface of the electronic scale 1. A connecting ring 31 is sleeved on the surface of the support frame 3. A first bolt 32 is threadedly connected to the surface of the connecting ring 31. A first spring 33 is fixedly connected to the surface of the first bolt 32. An end of the first spring 33 away from the first bolt 32 is movably connected to a first gasket 34. The first spring 33 is squeezed by rotating the first bolt 32 to clamp the support frame 3. A connecting rod 35 is fixedly connected to the surface of the connecting ring 31. An end of the connecting rod 35 away from the connecting ring 31 is fixedly connected to a first clamping plate 36. A second clamping plate 37 is movably connected to the surface of the first clamping plate 36. The second clamping plate 37 can rotate around the connection. A second bolt 38 is movably connected to the surface of the first clamping plate 36. A nut 39 is threadedly connected to the surface of the second bolt 38. A second spring 310 is sleeved on the surface of the second bolt 38. A second gasket 311 is fixedly connected to the surface of the second spring 310. The first clamping plate 36 and the second clamping plate 37 are brought close to clamp the test tube 21 by rotating the nut 39.

[0031] Furthermore, the support legs 11 are cylindrical in shape, the support legs 11 support the electronic scale 1 , and the tray 12 is plate-shaped.

[0032] Furthermore, the test tube 21 and the plug 22 are both in three groups. The inside of the test tube 21 is hollow. The plug 22 seals the test tube 21. The plug 22 is in a truncated cone shape. The balloon 23 is in two groups. The function of the balloon 23 is to prevent gas leakage during the experiment.

[0033] Furthermore, the temperature sensor 25 is in the shape of a long strip, and is used to sense and transmit the temperature for display on the digital thermometer 26. The rubber hose 27 and the syringe 28 are each in two groups. The rubber hose 27 is hollow inside, and the two ends of the rubber hose 27 are respectively plugged and connected to the surface of the test tube 21 and the syringe 28, and the liquid is transported to the inside of the test tube 21 through the rubber hose 27 and the syringe 28.

[0034] Furthermore, the connecting ring 31 is ring-shaped, and the connecting ring 31 is sleeved on the surface of the support frame 3 for fixing. The connecting ring 31 is in four groups. The first gasket 34 acts on the surface of the support frame 3 through the connecting ring 31, the first bolt 32 and the first spring 33. By rotating the first bolt 32, the first spring 33 and the first gasket 34 are pushed forward and squeezed on the surface of the support frame 3, thereby playing a fixing role.

[0035] Furthermore, the connecting rod 35 is in the shape of a round rod, the nut 39 is composed of three parts, one part of the nut 39 is in the shape of a cylinder, and the other two parts of the nut 39 are both in the shape of a round rod, and the second clamping plate 37 can rotate around the connection between the first clamping plate 36 and the second clamping plate 37.

[0036] Furthermore, the second gasket 311 is in a circular ring shape, and the first clamping plate 36 and the second clamping plate 37 act on the surface of the test tube 21 through the second bolt 38, the nut 39, the second spring 310 and the second gasket 311. By rotating the nut 39, the first clamping plate 36 and the second clamping plate 37 are brought close to each other, thereby clamping the test tube 21. The function of the second spring 310 is to rotate the nut 39 in the opposite direction when the test tube 21 needs to be removed, and the second spring 310 will rebound to push the second clamping plate 37 back to its original position.

[0037] Working principle: Before the experiment begins, place each group of test tubes 21 between the first clamping plate 36 and the second clamping plate 37, turn the nut 39 until the test tube 21 is clamped, move up and down through the connecting rod 35 to reach a suitable position, and turn the first bolt 32 to fix the connecting ring 31.

[0038] A set of syringes 28 are used to inject CuSO4 solution into one of the test tubes 21 to react with the corresponding iron wires 24. After the reaction is completed, the value change of the electronic scale 1 is observed. At the same time, red phosphorus and white phosphorus are fixedly inserted into the corresponding test tubes 21 with a set of iron wires 24 respectively. The test tubes 21 are sealed with stoppers 22. Water is added to the electric heating cup 2 and heated until the white phosphorus stops burning and heating. The value on the digital thermometer 26 is observed and recorded. Then, another set of syringes 28 are used to inject water into the test tube 21 containing white phosphorus until the white phosphorus is completely submerged. The condition of the white phosphorus is observed. At the same time, the red phosphorus is ignited with a high-energy laser pen for a comparative experiment. During this period, the value change displayed on the electronic scale 1 is observed. After the experiment is completed, the nut 39 is rotated in the opposite direction, and the test tube 21 is removed for subsequent cleaning.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A teaching aid for verifying combustion conditions and mass conservation, characterized in that: include: The frame comprises an electronic scale (1), the lower surface of the electronic scale (1) being fixedly connected to a support leg (11), and the upper surface of the electronic scale (1) being fixedly connected to a tray (12); The experimental device comprises an electric heating cup (2), wherein the electric heating cup (2) is arranged on the upper surface of a tray (12), a test tube (21) and a temperature sensor (25) are arranged inside the electric heating cup (2), a plug (22) is plugged and connected to the upper end of the test tube (21), a balloon (23) is plugged and connected to the surface of the plug (22), an iron wire (24) is plugged and connected to the surface of the plug (22), a digital thermometer (26) is fixedly connected to the upper end of the temperature sensor (25), a rubber hose (27) is plugged and connected to the surface of the test tube (21), and a syringe (28) is plugged and connected to the end of the rubber hose (27) away from the test tube (21); The clamping mechanism comprises a support frame (3), wherein the support frame (3) is fixedly connected to the surface of the electronic scale (1), a connecting ring (31) is sleeved on the surface of the support frame (3), a first bolt (32) is threadedly connected to the surface of the connecting ring (31), a first spring (33) is fixedly connected to the surface of the first bolt (32), an end of the first spring (33) away from the first bolt (32) is movably connected to a first gasket (34), a connecting rod (35) is fixedly connected to the surface of the connecting ring (31), an end of the connecting rod (35) away from the connecting ring (31) is fixedly connected to a first clamping plate (36), a second clamping plate (37) is movably connected to the surface of the first clamping plate (36), a second bolt (38) is movably connected to the surface of the second bolt (38) is threadedly connected to a nut (39), a second spring (310) is sleeved on the surface of the second bolt (38), and a second gasket (311) is fixedly connected to the surface of the second spring (310).

2. A teaching aid for verifying combustion conditions and mass conservation according to claim 1, characterized in that: The supporting legs (11) are cylindrical in shape, and the tray (12) is plate-shaped.

3. A teaching aid for verifying combustion conditions and mass conservation according to claim 1, characterized in that: The test tubes (21) and the plugs (22) are both in groups of three. The test tubes (21) are hollow inside, the plugs (22) are in the shape of a truncated cone, and the balloons (23) are in two groups.

4. A teaching aid for verifying combustion conditions and mass conservation according to claim 1, characterized in that: The temperature sensor (25) is in the shape of a long strip. The rubber hose (27) and the syringe (28) are both in two groups. The rubber hose (27) is hollow inside. The two ends of the rubber hose (27) are respectively plugged and connected to the surface of the test tube (21) and the syringe (28).

5. A teaching aid for verifying combustion conditions and mass conservation according to claim 1, characterized in that: The connecting ring (31) is ring-shaped and is in four groups. The first gasket (34) acts on the surface of the support frame (3) through the connecting ring (31), the first bolt (32) and the first spring (33).

6. A teaching aid for verifying combustion conditions and mass conservation according to claim 1, characterized in that: The connecting rod (35) is in the shape of a round rod, and the nut (39) is composed of three parts, one part of the nut (39) is in the shape of a cylinder, and the other two parts of the nut (39) are both in the shape of a round rod.

7. A teaching aid for verifying combustion conditions and mass conservation according to claim 1, characterized in that: The second gasket (311) is in the shape of a circular ring, and the first clamping plate (36) and the second clamping plate (37) act on the surface of the test tube (21) through the second bolt (38), the nut (39), the second spring (310) and the second gasket (311).

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