Multifunctional thermal expansion experiment instrument

A technology of thermal expansion and experimental instrument, applied in the direction of thermal expansion coefficient of materials, etc., can solve the problems of long duration of experiment and insignificant thermal expansion of objects, and achieve the effect of improving the measurement range, increasing the intuitive feeling, and the structure of the equipment is simple.

Inactive Publication Date: 2020-04-10
GUANGXI UNIV FOR NATITIES
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Problems solved by technology

The disadvantage of these devices is that the thermal expansion of the object is not obvious, the experiment lasts for a long time, and only simple observation and demonstration can be carried out.

Method used

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  • Multifunctional thermal expansion experiment instrument
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Embodiment Construction

[0021] Based on the analysis of the needs and current situation of scientific and educational instruments in primary and middle schools at all levels, the present invention aims at the experimental principle of thermal expansion of objects, and converts the thermal expansion of objects into pointer angle changes, which is different from existing detection methods and overcomes the existing problems. It has the disadvantages of low precision in direct measurement of thermal expansion, and poor intuition that the naked eye cannot detect small volume changes. The specific structure of the instrument is:

[0022] like figure 1 and figure 2 Shown, a kind of multifunctional thermal expansion tester, comprises U-shaped support 5, on a vertical rod of U-shaped support 5, horizontally holds object 4 to be tested, is the light weight aluminum rod of 80 centimeters long, and the aluminum rod One end leans against another vertical bar of the U-shaped bracket 5, so that it can only expa...

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Abstract

The invention relates to a multifunctional thermal expansion experiment instrument. The instrument comprises a U-shaped bracket, a detected object is horizontally held on a vertical rod of the U-shaped bracket, and one end of the detected object abuts against another vertical rod of the U-shaped bracket, a heat source is arranged below the detected object close to one side of the U-shaped bracket,a support with a semicircular dial is arranged outside the U-shaped bracket, a groove is arranged at the top end of the support, an L-shaped metal wire is arranged in the groove, the horizontal partof the metal wire is placed in the groove and is in close contact with the detected object, the vertical part of the L-shaped metal wire is parallel to the plane where the semicircular dial is located, and the diameter of the L-shaped metal wire is larger than that of the groove. According to the invention, tiny volume change of the detected object when the detected object is heated and expanded is visually displayed through needle deflection or the change of a calibrated scale and a thermochromic material, and quantitative calculation can be carried out. The instrument is simple to use, convenient for primary and secondary school students to operate, intuitive and vivid in phenomenon, and low in cost, and is convenient for batch production and large-area popularization and application.

Description

technical field [0001] The invention relates to the technical field of experimental equipment, in particular to a thermal expansion experiment instrument. Background technique [0002] Thermal phenomena are closely related to the temperature change of objects. For metal and non-metal materials at high temperature, their thermal expansion coefficients are very small, and it is difficult to directly observe the physical process with the eyes. It is necessary to use a professional thermal expansion coefficient tester to measure the expansion during the heating process. and shrinkage properties. [0003] Existing thermal expansion experiment measurement principles and devices are mainly divided into the following types: (1) optical methods, including optical lever dilatometers, optical interference dilatometers; (2) electrical methods, including inductive dilatometers, capacitive dilatometers Dilatometer; (3) mechanical method, including dial gauge dilatometer, lever dilatomete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/16
CPCG01N25/16
Inventor 李耀俊
Owner GUANGXI UNIV FOR NATITIES
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