CN2575658Y - Industry analysing instrument with thermal insulation apparatus - Google Patents
Industry analysing instrument with thermal insulation apparatus Download PDFInfo
- Publication number
- CN2575658Y CN2575658Y CN 02280896 CN02280896U CN2575658Y CN 2575658 Y CN2575658 Y CN 2575658Y CN 02280896 CN02280896 CN 02280896 CN 02280896 U CN02280896 U CN 02280896U CN 2575658 Y CN2575658 Y CN 2575658Y
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- density
- arm
- balance
- utility
- model
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Abstract
The utility model relates to a density balance which comprises a weight tray on which weights are arranged. The utility model is characterized in that the left side of a fulcrum is provided with a weight arm, and the right side is provided with a density arm of which one end is hung with the weight tray; one end of the weight arm is hung with a measured object arranged in a container containing water; the density arm is provided with scales. The utility model can conveniently, quickly and directly give the density value of the measured object via the skillful combination of the lever principle and the floatage principle as well as the scaling process of the balance arms, so as to simplify the procedures of measuring object density. The utility model has the advantages of simple structure, convenient operation, high measuring precision and enlightening function, and can be widely used for dynamics experiments and teaching.
Description
Technical field: the utility model relates to a kind of Experiments of Machanics and central density balance of teaching of can be used for.
Background technology: density is an important physical quantity, no matter be technically or in teaching, all need the density of Measuring Object, and quality (using balance) and the volume (graduated cylinder) by the Measuring Object density of calculating object earlier normally.Come the method for density measurement more loaded down with trivial details with above-mentioned conventional apparatus, the density value of surveying need calculate just and can obtain, and also accurate inadequately.
Summary of the invention: the purpose of this utility model is the deficiency at common density survey instrument and measuring method, and has designed new tool one density balance of more simple, fast density measurement.Density balance is that lever principle and law of buoyancy are organically combined, and balance is transformed into compound measurer from simple measurer.For achieving the above object, the utility model adopts following technical proposals: density balance, comprise scale pan (4), and be placed with counterweight (7) on the scale pan (4), it is characterized in that: the left side of fulcrum (1) is provided with weight arm (2); The right side is provided with density arm (3), and the end of density arm (3) is outstanding scale pan (4), and the end of weight arm (2) hangs with measured object (5), and measured object (5) places water container (6), and described density arm (3) is provided with scale.
The utility model is by lever principle is combined with the ingenious of law of buoyancy, and the calibration of balance arm is handled, and can directly provide the density value of testee quickly and easily, thereby simplify the program of Measuring Object density greatly.Density balance is except the density value of Measuring Object easily, its a kind of especially novel teaching aid, and it in use can make the student be subjected to the education of creative thinking.Density balance is the ingenious result who combines of Archimedes's lever principle and the law of buoyancy, and this result has measured the density of object, as if the crown of assaying with density balance, then not only have and judge the true and false of crown, and can judge the gold content of golden rim the inside, judgement is qualitatively risen to quantitative measurement.Therefore, density balance is that Archimedes three is invented greatly, that is: lever principle, law of buoyancy, crown are identified the result of ingenious integrated application.This product structure is simple, easy to use, measuring accuracy is high, open people's intelligence, can be widely used in Experiments of Machanics and the teaching.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Specific embodiment:
With reference to Fig. 1, density balance comprises scale pan 4, is placed with counterweight 7 on the scale pan 4, it is characterized in that: the left side of fulcrum 1 is provided with weight arm 2; The right side is provided with density arm 3, and the end of density arm 3 is outstanding scale pan 4, and the end of weight arm 2 hangs with measured object 5, and measured object 5 places water container 6, and described density arm 3 is provided with scale.
Using method: at first, testee is placed the balance left side, and add counterweight on the balance right side, make the balance balance, then measured object is placed water fully, but do not contact the bottom of water container, allow it be subjected to buoyancy of water, at this moment, counterweight is moved to the fulcrum direction, when moving on to suitable position, balance will be again balance, this only is decided by the density p thing of measured object in position of balance again, if this, we just can be marked with numerical value according to the respective point of physical principle on the right arm of balance, and these numerical value can be represented the density of testee.Density value on the balance arm combines according to lever equilibrium condition and law of buoyancy and demarcates.Now be described below: the volume of testee is
, its suffered buoyancy in water is
So, the moment of object in water time moment outside water the time
, in view of the above, we just can for example exist in density arm (i.e. right arm among the figure) the subscript upper density value of balance
The place promptly
The place puts on 20, this means when counterweight to move to here and the measured object balance that places water, and the density of representing this measured object is 20 (density with water is 1), the length of density arm
Claims (1)
1, a kind of density balance comprises scale pan (4), is placed with counterweight (7) on the scale pan (4), it is characterized in that: the left side of fulcrum (1) is provided with weight arm (2); The right side is provided with density arm (3), and the end of density arm (3) is outstanding scale pan (4), and the end of weight arm (2) hangs with measured object (5), and measured object (5) places water container (6), and described density arm (3) is provided with scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02280896 CN2575658Y (en) | 2002-11-05 | 2002-11-05 | Industry analysing instrument with thermal insulation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02280896 CN2575658Y (en) | 2002-11-05 | 2002-11-05 | Industry analysing instrument with thermal insulation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2575658Y true CN2575658Y (en) | 2003-09-24 |
Family
ID=33743499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02280896 Expired - Fee Related CN2575658Y (en) | 2002-11-05 | 2002-11-05 | Industry analysing instrument with thermal insulation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2575658Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788737A (en) * | 2012-08-10 | 2012-11-21 | 毛陈 | Gravimeter |
| CN103364307A (en) * | 2013-08-07 | 2013-10-23 | 郑玉龙 | Rider-type solid-density measuring instrument |
| CN104897518A (en) * | 2015-06-15 | 2015-09-09 | 安徽华茂纺织股份有限公司 | Special device for detecting density of metal material |
| CN107084909A (en) * | 2017-05-15 | 2017-08-22 | 中国地质调查局西安地质调查中心 | A kind of convenient method and system for determining rock forming mineral density |
| CN109493698A (en) * | 2018-12-13 | 2019-03-19 | 中国农业大学烟台研究院 | A kind of physics teaching water flow measurement system |
-
2002
- 2002-11-05 CN CN 02280896 patent/CN2575658Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788737A (en) * | 2012-08-10 | 2012-11-21 | 毛陈 | Gravimeter |
| CN102788737B (en) * | 2012-08-10 | 2015-05-06 | 毛陈 | Gravimeter |
| CN103364307A (en) * | 2013-08-07 | 2013-10-23 | 郑玉龙 | Rider-type solid-density measuring instrument |
| CN104897518A (en) * | 2015-06-15 | 2015-09-09 | 安徽华茂纺织股份有限公司 | Special device for detecting density of metal material |
| CN107084909A (en) * | 2017-05-15 | 2017-08-22 | 中国地质调查局西安地质调查中心 | A kind of convenient method and system for determining rock forming mineral density |
| CN109493698A (en) * | 2018-12-13 | 2019-03-19 | 中国农业大学烟台研究院 | A kind of physics teaching water flow measurement system |
| CN109493698B (en) * | 2018-12-13 | 2021-05-28 | 中国农业大学烟台研究院 | Water flow measuring system for physics teaching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |