Archimedes principle experiment demonstration device

Abstract

The utility model relates to the technical field of teaching aids, and particularly discloses an Archimedes principle experiment demonstration device which comprises a spring dynamometer, a weight, an overflow cup, a water receiving cup and a supporting frame, the supporting frame is of a rectangular frame structure, a bottom plate is arranged at the bottom of the supporting frame, and a pulling plate and an object placing plate are arranged in the supporting frame from top to bottom. The spring dynamometer comprises a first spring dynamometer and a second spring dynamometer, a fixed pulley is arranged on the pulling plate, the upper end of the first spring dynamometer is matched with the fixed pulley through a first pulling rope, and the second spring dynamometer is connected with the pulling plate through a second pulling rope. The overflow cup is located at the upper end of the storage plate and located below the first spring dynamometer, the weight is hung at the lower end of the first spring dynamometer, the water receiving cup is hung at the lower end of the second spring dynamometer, an overflow pipe is connected to the side wall of the overflow cup, and a water outlet of the overflow pipe is located at the upper end of the water receiving cup.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching aids, in particular to an Archimedes principle experiment demonstration device. Background Art

[0002] The definition of Archimedes' principle is: an object immersed in a stationary fluid (gas or liquid) is subject to a buoyant force equal to the weight of the fluid displaced by the object, directed vertically upward and passing through the centroid of the displaced fluid, that is, Ffloat = Gliddisplace = mliddisplace g = gVdisplaceρliquid (Vdisplace represents the volume of the liquid displaced by the object).

[0003] In order to verify this principle, in the physics teaching process, it is necessary to proceed step by step and use a spring dynamometer to measure the weight of the metal block before and after it is immersed in water, as well as the weight of the overflowing water. The operation is cumbersome and time-consuming. Utility Model Content

[0004] The utility model aims at the above-mentioned deficiencies in the prior art and provides an Archimedes principle experiment demonstration device. The height of a heavy object can be controlled by pulling a rope so that required data can be measured by two spring dynamometers. The operation is simple and quick, operation steps are saved, the probability of error is reduced, time is saved, and experimental efficiency is improved. During the experiment, the numerical value changes of the spring dynamometer can be observed more intuitively, which is more intuitive and vivid.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An Archimedes principle experiment demonstration device comprises a spring dynamometer, a weight, an overflow cup, a water receiving cup and a support frame, wherein the support frame is a rectangular frame structure, a bottom plate is provided at the bottom of the support frame, a pull plate and a storage plate are provided in the support frame from top to bottom, the spring dynamometer comprises a first spring dynamometer and a second spring dynamometer, a fixed pulley is provided on the pull plate, the upper end of the first spring dynamometer cooperates with the fixed pulley through a first pull rope, the second spring dynamometer is connected to the pull plate through a second pull rope, the overflow cup is located at the upper end of the storage plate and below the first spring dynamometer, the weight is suspended at the lower end of the first spring dynamometer, the water receiving cup is suspended at the lower end of the second spring dynamometer, an overflow pipe is connected to the side wall of the overflow cup, and a water outlet of the overflow pipe is located at the upper end of the water receiving cup.

[0007] Preferably, a backing plate is provided between the pulling plate and the storage plate, and the first spring dynamometer and the second spring dynamometer lean against one side of the backing plate.

[0008] Preferably, a positioning groove for placing the overflow cup is provided at the upper end of the storage plate.

[0009] Preferably, a positioning plate is provided on one side of the backing plate, a positioning hole is vertically provided on the positioning plate, a guide cylinder is provided at one end of the first pull rope, and a positioning pin cooperating with the positioning hole is provided in the guide cylinder.

[0010] Preferably, the upper end of the positioning plate is provided with a wire sleeve that cooperates with the pull rope.

[0011] Preferably, one end of the guide cylinder is connected to a protective sleeve, one end of the positioning pin is provided with an end cap, a spring connecting the end cap and the guide cylinder is provided in the protective sleeve, and a pull rod is connected to the side wall of the end cap.

[0012] Preferably, a guardrail connected to the bottom plate is provided on the outer side of the water receiving cup.

[0013] Preferably, the overflow cup is made of transparent material.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model can measure the required data through two spring dynamometers only by pulling the rope to control the height of the weight. The operation is simple and quick, which saves operation steps, reduces the probability of error, saves time and improves experimental efficiency. During the experiment, the numerical changes of the spring dynamometer can be observed more intuitively, which is more intuitive and vivid.

[0016] 2. The utility model can control the submerged volume of the heavy object by pulling the rope, and the rope is conveniently fixed by the positioning pin, which facilitates the measurement of multiple sets of data, greatly improves the detection efficiency, and makes the operation more convenient.

[0017] 3. The utility model can protect the water cup by means of the guardrail to prevent the water cup from swinging, thereby improving safety.

[0018] 4. The utility model can fix the pull rope at different positions through the positioning plate, and the sliding cooperation between the positioning pin and the guide cylinder can increase the convenience of opening the positioning pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 is a structural schematic diagram of the support frame;

[0021] Figure 3 It is a structural schematic diagram of the overflow cup;

[0022] Figure 4 is a cross-sectional view of the locking mechanism;

[0023] Figure 5 is a structural schematic diagram of a positioning plate;

[0024] In the figure: 1-support frame; 101-pull plate; 102-fixed pulley; 103-positioning hole; 104-positioning plate; 105-back plate; 106-storage plate; 107-positioning groove; 108-bottom plate; 109-guardrail; 110-wire sleeve; 2-first pull rope; 201-positioning pin; 202-guide cylinder; 203-protective sleeve; 204-pull rod; 205-end cap; 206-spring; 3-first spring dynamometer; 4-overflow cup; 401-overflow pipe; 5-water receiving cup; 6-second spring dynamometer; 601-second pull rope; 7-weight. 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] like Figure 1 As shown, an Archimedes principle experimental demonstration device includes a spring 206 dynamometer, a weight 7, an overflow cup 4, a water receiving cup 5 and a support frame 1, as shown in FIG. Figure 2 As shown, the support frame 1 is a rectangular frame structure, and a bottom plate 108 is provided at the bottom of the support frame 1 for support. A pull plate 101 and a storage plate 106 are provided from top to bottom in the support frame 1. The spring 206 dynamometer includes a first spring 206 dynamometer 3 and a second spring 206 dynamometer 6. A fixed pulley 102 is provided on the pull plate 101. The upper end of the first spring 206 dynamometer 3 cooperates with the fixed pulley 102 through a first pull rope 2. By pulling the first pull rope 2, the first spring 206 dynamometer 3 can be lifted upward. The second spring 206 dynamometer 6 is connected to the pull plate 101 through a second pull rope 601. The overflow cup 4 is located at the upper end of the storage plate 106 and below the first spring 206 dynamometer 3. The weight 7 is suspended at the lower end of the first spring 206 dynamometer 3. The first spring 206 dynamometer 3 is released downward, so that the weight 7 can be immersed in the water of the overflow cup 4. The water receiving cup 5 is suspended at the lower end of the second spring 206 dynamometer 6, as shown in FIG. Figure 3 As shown, an overflow pipe 401 is connected to the side wall of the overflow cup 4 , and a water outlet of the overflow pipe 401 is located at the upper end of the water receiving cup 5 , so that water flowing out of the overflow cup 4 is immersed in the water receiving cup 5 .

[0027] A support plate 105 is provided between the pull plate 101 and the storage plate 106. The first spring 206 dynamometer 3 and the second spring 206 dynamometer 6 lean against one side of the support plate 105, which can prevent the first spring 206 dynamometer 3 and the second spring 206 dynamometer 6 from swinging, thereby improving the stability of use.

[0028] The upper end of the storage plate 106 is provided with a positioning groove 107 for placing the overflow cup 4, which can prevent the overflow cup 4 from sliding and improve the safety of use.

[0029] A positioning plate 104 is provided on one side of the support plate 105, and a positioning hole 103 is vertically provided on the positioning plate 104. A guide cylinder 202 is provided at one end of the first pull rope 2, and a positioning pin 201 cooperating with the positioning hole 103 is provided in the guide cylinder 202. The positioning pin 201 cooperates with the positioning hole 103 to fix the pull rope, so as to realize the position positioning of the first spring 206 and the dynamometer 3. Figure 5 As shown, the upper end of the positioning plate 104 is provided with a wire sleeve 110 that cooperates with the pull rope, which can cooperate with the guide cylinder 202 to limit the end of the pull rope, and ensure that only the pull rope moves up and down, thereby improving the firmness of the cooperation between the positioning pin 201 and the positioning hole 103.

[0030] To ensure the convenience of opening, Figure 4 As shown, a protective sleeve 203 is connected to one end of the guide cylinder 202, an end cap 205 is provided at one end of the positioning pin 201, a spring 206 connecting the end cap 205 and the guide cylinder 202 is provided in the protective sleeve 203, a pull rod 204 is connected to the side wall of the end cap 205, and the positioning pin 201 can slide with the guide cylinder 202 to improve the convenience of plugging and unplugging. Under the action of the spring 206, the positioning pin 201 can maintain a locked state. Due to the action of the wire sleeve 110, the pull rope is inclined outward and the pulling resistance is large. Therefore, it can be opened by only pulling the positioning pin 201. One hand fixes the guide cylinder 202, and the other hand pulls the positioning pin 201 to open it. After letting go, the positioning pin 201 is reset under the action of the spring 206.

[0031] A guardrail 109 connected to the bottom plate 108 is disposed on the outside of the water receiving cup 5. The diameter of the guardrail 109 is larger than that of the water receiving cup 5 and does not contact the water receiving cup 5, but can prevent foreign objects from touching the water receiving cup 5 and prevent the water receiving cup 5 from shaking.

[0032] The overflow cup 4 is made of transparent glass and filled with water, and the water surface just reaches the water inlet of the overflow pipe 401. During the experiment, firstly, the height of the first spring 206 dynamometer 3 is raised, and the weight 7 is hung at the lower end of the first spring 206 dynamometer 3, and the reading F1 of the first spring 206 dynamometer 3 is recorded. At the same time, the water receiving cup 5 is hung at the lower end of the second spring 206 dynamometer 6, and the reading F2 of the second spring 206 dynamometer 6 is recorded. The positioning pin 201 is opened, and the weight 7 is released downward to immerse the weight 7 in the water, and the positioning pin 201 is fixed with the positioning hole 103. At this time, the water flow overflows from the overflow pipe 401 into the water receiving cup 5. After the overflow pipe 401 no longer overflows, the reading F3 of the first spring 206 dynamometer 3 and the reading F4 of the first spring 206 dynamometer 3 are recorded. Finally, the size of F1-F3 and F2-F4 is verified, and the Archimedean principle can be verified.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An Archimedes principle experimental demonstration device, comprising a spring dynamometer, a weight, an overflow cup and a water receiving cup, characterized in that: It also includes a support frame, which is a rectangular frame structure. The bottom of the support frame is provided with a base plate. A pull plate and a storage plate are arranged from top to bottom in the support frame. The spring dynamometer includes a first spring dynamometer and a second spring dynamometer. A fixed pulley is provided on the pull plate. The upper end of the first spring dynamometer cooperates with the fixed pulley through a first pull rope. The second spring dynamometer is connected to the pull plate through a second pull rope. The overflow cup is located at the upper end of the storage plate and below the first spring dynamometer. The weight is suspended at the lower end of the first spring dynamometer. The water receiving cup is suspended at the lower end of the second spring dynamometer. An overflow pipe is connected to the side wall of the overflow cup. The water outlet of the overflow pipe is located at the upper end of the water receiving cup.

2. The Archimedes principle experimental demonstration device according to claim 1, characterized in that: A backing plate is provided between the pulling plate and the storage plate, and the first spring dynamometer and the second spring dynamometer lean against one side of the backing plate.

3. The Archimedes principle experimental demonstration device according to claim 1, characterized in that: The upper end of the storage plate is provided with a positioning groove for placing the overflow cup.

4. The Archimedes principle experimental demonstration device according to claim 2, characterized in that: A positioning plate is provided at one side of the backing plate, a positioning hole is vertically provided on the positioning plate, a guide cylinder is provided at one end of the first pull rope, and a positioning pin matched with the positioning hole is provided in the guide cylinder.

5. The Archimedes principle experimental demonstration device according to claim 4, characterized in that: The upper end of the positioning plate is provided with a wire sleeve matched with the pull rope.

6. The Archimedes principle experimental demonstration device according to claim 5, characterized in that: One end of the guide cylinder is connected with a protective sleeve, one end of the positioning pin is provided with an end cap, a spring connecting the end cap and the guide cylinder is provided in the protective sleeve, and a pull rod is connected to the side wall of the end cap.

7. The Archimedes principle experimental demonstration device according to claim 1, characterized in that: A guardrail connected to the bottom plate is arranged on the outer side of the water receiving cup.

8. The Archimedes principle experimental demonstration device according to claim 1, characterized in that: The overflow cup is made of transparent material.

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