Unlock instant, AI-driven research and patent intelligence for your innovation.

Improved foam block buoyancy test demonstration device

A demonstration device and foam block technology, applied in the field of experimental devices, can solve problems such as low success rate of experiments, pulling off plasticine and pulleys, and test errors, so as to make the experimental process easier, reduce frictional resistance, and shorten the experimental time. Effect

Inactive Publication Date: 2020-10-02
兰如根
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-made equipment according to the requirements of the book is not effective in this experiment, and the success rate of the experiment is low. The problems here are:
[0003] ①. Plasticine fixing problem: In the sink, the plasticine is difficult to fix in the water, the plasticine is not firmly attached to the bottom of the container, and it is easy to pull the plasticine and the pulley together
[0004] ②. The size of the water tank: To make the dynamometer measure the tensile force on the foam block, a relatively deep water tank is needed. If a large water tank is used, water will be wasted. The mud is not easy to be placed at the bottom of the bottle, the space is narrow, and the rope operation is more difficult
[0005] ③. The problem of threading and pressing the rope: the rope is easy to come out of the groove of the pulley. In the sink, it is difficult to thread the rope in the gap under the pulley. The thread falls off, and it is even more difficult to press the rope into the groove of the pulley.
It is not easy to thread and press the rope at the bottom of the tank with water, and it takes a lot of effort to thread the rope repeatedly
[0006] ④. Mutual interference between the rope of the pull-up dynamometer and the pull-down foam block: When the dynamometer is pulled up, the angle of inclination formed by only one pulley is small, and the rope of the pull-up dynamometer and the foam block pulled down Blocks collide with each other and interfere with each other, resulting in test errors
[0007] The experimental teaching is limited by time, in a hurry, due to the equipment, the experiment is hastily done, the experimental demonstration becomes an explanation experiment, and the experimental effect is not achieved.
In short, the success rate of the experiment is low, but the simple experiment is troublesome.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improved foam block buoyancy test demonstration device
  • Improved foam block buoyancy test demonstration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the size of the sink and the foam block, fix two one-leg pulleys at the bottom of the frame at an interval of 3 cm to 8 cm, connect the foam block and the dynamometer with a rope, and lean the rope against the groove on the bottom surface of the single-leg pulley, and put the frame vertically Immerse in a flat tank to test for buoyancy.

[0027] The water tank is filled with four-fifths of water, and the water level changes before and after the foam is immersed in water are recorded at the same time. Use a buoyancy test frame to test buoyancy, build it outside the tank, and then immerse it in the tank for testing.

[0028] Rope pressure: solve the problem of difficult threading. Wearing the rope becomes fast pressing the rope. On the buoyancy test frame, the rope connecting the foam block and the dynamometer is quickly inserted into the groove on the bottom surface of the single-leg pulley through the rope guide rod. Even if the rope is detached during th...

Embodiment 2

[0034] The front side of the side bar of the frame is aligned with the groove of the pulley. As long as the rope is lifted up against the side bar of the frame, the rope enters the groove of the pulley, that is, the side bar of the frame replaces the rope guide next to the single-leg pulley.

[0035] Other same example 1. Other parts not described are similar to the previous specific implementation methods and examples, and will not be repeated in detail.

[0036] Build outside the sink, test in the sink. The design is simple, the operation is convenient, the experimental process is made difficult, the experimental time is greatly shortened, the success rate is high, the production is simple, the cost is low, it can be used repeatedly, and the teaching demonstration is more effective.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An improved foam block buoyancy test demonstration device is composed of a frame, single-foot pulleys, a rope guide rod, a hook, a foam block, a rope, a dynamometer and a flat water tank. A buoyancy test frame is used for testing the foam block buoyancy; a pulley is disengaged from bottom of water tank, the single-foot pulleys are fixed on a cross rod at the bottom end of the frame; a rope for connecting the foam block and the dynamometer is quickly positioned in a groove in the bottom surface of the single-foot pulley through the rope guide rod, the two single-foot pulleys are separated, andthe rope is wound into a U shape, so that the problem of interference caused by friction and collision between a lifting rope connected with the dynamometer and the foam block is prevented, and the problems that plasticine is difficult to fix and string are solved; the frame is vertically immersed into a water tank for testing, water saving demonstrating is carried out, and buoyancy is tested; constructing is carried out outside the water tank, and testing is carried out in the water tank; the device is simple in design, convenient to operate, short in experiment time, high in success rate, simple to manufacture, low in cost, reusable and more effective in teaching demonstration.

Description

Technical field: [0001] The invention belongs to an experimental device, in particular to an improved foam block buoyancy test demonstration device. Background technique: [0002] The content of the buoyancy test in Unit 1, Lesson 5, and Lesson 5 of the second volume of the textbook for the fifth grade of science in the textbook. A test designed to reveal how much buoyancy a floating block of foam experiences when submerged in water, or a test of the buoyancy of blocks of foam of different sizes immersed in water. It is known that the larger the volume of an object immersed in water, the greater the amount of water it displaces and the greater the buoyant force it receives. The textbook provides a method of sticking the pulley with plasticine at the bottom of the tank and changing the direction of the pulling force to test the buoyancy of the foam block immersed in water. There is no matching experimental equipment in the laboratory and on the market. The self-made equipme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/12
CPCG09B23/12
Inventor 兰如根
Owner 兰如根