CN201893051U

CN201893051U - Multifunctional thermal expansion and cold contraction demonstrator

Info

Publication number: CN201893051U
Application number: CN2010205662509U
Authority: CN
Inventors: 洪剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-19
Filing date: 2010-10-19
Publication date: 2011-07-06
Anticipated expiration: 2020-10-19

Abstract

The utility model discloses a multifunctional thermal expansion and cold contraction demonstrator, and aims at intuitively and conveniently demonstrating thermal expansion and cold contraction phenomenon of solid, gas and liquid, and ensuring that students can clearly and intuitively observe the thermal expansion and cold contraction phenomenon of solid, gas and liquid. The multifunctional thermal expansion and cold contraction demonstrator comprises a support body, a piston pump, a fixed seat, an alcohol lamp, a glass tube and a graduated ruler, wherein the piston pump and the fixed seat are oppositely arranged; the alcohol lamp is arranged right below the piston pump and the fixed seat; the glass tube is connected with the outlet of the piston pump and is vertically placed beside the graduated ruler after being bent; and liquid with color is arranged in the piston pump and the glass tube. With the adoption of the multifunctional thermal expansion and cold contraction demonstrator, the thermal expansion and cold contraction phenomenon of solid, gas and liquid can be demonstrated on one instrument; meanwhile, the thermal expansion and cold contraction phenomenon can be intuitively and clearly observed and known by the students in a short time.

Description

Multi-functional heat expansion shrinkage demonstration device

Technical field

The utility model relates to instruments used for education, specially refers to the multi-functional heat expansion shrinkage demonstration device that uses in primary school's " nature ", the education of " science " course.

Background technology

The expand with heat and contract with cold teaching of part knowledge of object is arranged in primary school's " nature ", " science " teaching material.Five grades volume two science of religion section version teaching material is exactly that guiding student is probed into liquid, gas, solid expansion and contraction property for the 30-38 page, having designed three experiments in the book probes into respectively the object phenomenon of expanding with heat and contract with cold, prepare the different equipment of three covers, and the demonstration solid when expanding with heat and contract with cold the time spent longer, can't see the overall process of expanding with heat and contract with cold; Demonstration liquid will be assembled device when gas expands with heat and contract with cold, and the time spent is also longer, and is not easy the situation of expanding with heat and contract with cold the different metal solid, and solid, liquid, the gas speed degree of expanding with heat and contract with cold compares.

Summary of the invention

For demonstrating the phenomenon of expanding with heat and contract with cold of solid, gas and liquid intuitively, easily, make students can observe the phenomenon of expanding with heat and contract with cold of solid, gas and liquid clear on a covering device, intuitively, the utility model proposes a kind of multi-functional heat expansion shrinkage demonstration device.The multi-functional heat expansion shrinkage of the utility model demonstration device comprises support body, piston pump, holder, spirit lamp, glass tube and rule, wherein, piston pump and holder are oppositely arranged, spirit lamp be placed on piston pump and holder under, glass tube connects the piston delivery side of pump and vertically be placed on the rule next door after bending, and colored liquid is housed in piston pump and glass tube.Adopt the multi-functional heat expansion shrinkage of the utility model demonstration device can on an instrument, demonstrate the phenomenon of expanding with heat and contract with cold of solid, gas and liquid, and can intuitively, clearly allow observation of students and understand the phenomenon of expanding with heat and contract with cold of solid, gas and liquid within a short period of time.

Description of drawings

Accompanying drawing 1 is the expand with heat and contract with cold embodiment synoptic diagram of phenomenon of the multi-functional heat expansion shrinkage of the utility model demonstration device demonstration liquid or gas;

Accompanying drawing 2 is demonstrated the embodiment synoptic diagram of the phenomenon of fixedly expanding with heat and contract with cold for the multi-functional heat expansion shrinkage of the utility model demonstration device.

Below in conjunction with the drawings and specific embodiments the multi-functional heat expansion shrinkage of the utility model demonstration device is further described.

Embodiment

Accompanying drawing 1 is the expand with heat and contract with cold embodiment synoptic diagram of phenomenon of the multi-functional heat expansion shrinkage of the utility model demonstration device demonstration liquid or gas, and among the figure, 1 is support body, and 2 is piston pump, and 3 is holder, and 4 is spirit lamp, and 5 is glass tube, and 6 is rule.As seen from the figure, the multi-functional heat expansion shrinkage of the utility model demonstration device comprises support body 1, piston pump 2, holder 3, spirit lamp 4, glass tube 6 and rule 6, wherein, piston pump and holder are oppositely arranged, spirit lamp be placed on piston pump and holder under, glass tube connects the piston delivery side of pump and vertically be placed on the rule next door after bending, and colored liquid is housed in piston pump and glass tube.So-called piston pump is actually the utensil that is similar to syringe one class, and an end is a liquid outlet, and the other end is a piston, and under the effect of pressure, piston can be moved to the left, and extruding liquid raises the position of liquid in the glass tube that vertically is placed on the rule next door.

Expanding with heat and contract with cold during phenomenon of demonstration liquid or gas, liquid or gas need be contained in another piston pump, and an end of liquid outlet is fixed on the holder 3 after airtight, there is an end of piston to be close on the piston of piston pump 2, promptly the piston of two piston pumps closely contacts.At this moment, light spirit lamp 4, the piston pump that liquid or gas are housed is heated under the burning of flame, and the liquid of the inside or gas also are heated, and along with the volumetric expansion of liquid or gas, the piston that promotes piston pump is moved to the left, the piston that also promptly promotes to be fixed on the piston pump on the support body is moved to the left, extruding liquid raises the position of liquid in the glass tube that vertically is placed on the rule next door, observes the thermal expansion phenomenon of liquid or gas thus.After treating that the liquid of piston pump the inside or gas are heated to a certain degree, extinguish spirit lamp, the liquid or the gas of piston pump the inside are cooled, and volume shrinks, because the effect of vacuum, the piston of the piston pump of loading liquid or gas can move right.At this moment, can not move right thereupon,, can observe the cold shrinkage phenomenon of liquid or gas from the gap between the piston of two piston pumps though be fixed on the piston of the piston pump on the support body.

Accompanying drawing 2 is the expand with heat and contract with cold embodiment synoptic diagram of phenomenon of the multi-functional heat expansion shrinkage of the utility model demonstration device demonstration solid.Expanding with heat and contract with cold during phenomenon of demonstration solid, one end of slender type solid need be fixed on the holder 3, the other end is close on the piston of the piston pump 2 that is fixed on the support body, at this moment, lights spirit lamp 4, the slender type solid is heated under the burning of flame, the volumetric expansion of solid, the piston that promotion is fixed on the piston pump on the support body is moved to the left, extruding liquid, the position of liquid in the glass tube that vertically is placed on the rule next door raise, observe the thermal expansion phenomenon of solid thus.Extinguish spirit lamp, the slender type solid is cooled, and volume shrinks, and length can shorten, and at this moment, can not move right though be fixed on the piston of the piston pump on the support body thereupon, from the gap between solid and the piston, can observe the cold shrinkage phenomenon of solid.

Obviously, for the piston pump of expand with heat and contract with cold phenomenon piston pump and loading liquid or the gas of observing solid, gas and liquid removed preferably by glass preparation.

In addition, according to the speed of rule numeral variation and the number of division of rising, can compare the phenomenon of expanding with heat and contract with cold of solid, liquid, three kinds of materials of gas easily, relatively its speed and degree of expanding with heat and contract with cold and changing during demonstration; The speed and the degree of expanding with heat and contract with cold and changing that can also more different solids.

Claims

1. multi-functional heat expansion shrinkage demonstration device, it is characterized in that: this multi-functional heat expansion shrinkage demonstration device, comprise: support body, piston pump, holder, spirit lamp, glass tube and rule, wherein, piston pump and holder are oppositely arranged, spirit lamp be placed on piston pump and holder under, glass tube connects the piston delivery side of pump and also vertically be placed on the rule next door after bending, and colored liquid is housed in piston pump and glass tube.