A demonstration teaching of buoyancy in water

Abstract

The invention discloses a water buoyancy demonstration teaching instrument. The teaching instrument comprises a base; a closed container and a pressurization pipe are fixedly mounted on the two sidesof the top of the base respectively; a sliding groove is formed in the top of the pressurization pipe; a guide pipe is connected to the pressurization pipe; one end of the guide pipe extends to the pressurization pipe; the other end of the guide pipe extends into the closed container; a rotating disc is rotationally mounted at the top of the pressurization pipe; a screw rod is fixedly mounted at the bottom of the rotating disc; the screw rod is sleeved with a sliding plate in a threaded manner; brackets are fixedly mounted on the two sides of the bottom of the sliding plate; the same piston plate is fixedly mounted at the bottom ends of the two brackets; the sliding plate and the piston plate are both mounted in the sliding groove in a sliding mode; a plurality of grooves are formed in thetop of the pressurization pipe; and sliding rods are mounted in the grooves in the sliding mode. The rotating disc is rotated to drive the piston plate to move; a pressure value of air in the closedcontainer can be adjusted when the piston plate moves up and down in the sliding groove; and the position of the rotating disc can be fixed, so that the change of the pressure in the closed containerdue to the fact that the rotating disc is mistakenly touched is avoided.

Description

technical field [0001] The invention relates to the technical field of teaching instruments, in particular to a demonstration teaching of buoyancy in water. Background technique [0002] The teaching practice of buoyancy in middle school physics generally adopts the way of preaching to impart knowledge to students. Students can only passively accept it in a force-feeding manner. The theory cannot be connected with practice, and the teaching effect is poor. There are also some buoyancy demonstration devices in the prior art, which can only simply demonstrate the relationship between gravity and buoyancy, and the phenomenon demonstrated is relatively dull. After retrieval, the patent document with application number 201310652561.5 discloses a buoyancy teaching demonstration instrument. The demonstrator includes a transparent airtight container, which is filled with liquid. There is a gap between the liquid level of the liquid and the top of the airtight container. There is a...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a buoyancy demonstration teaching in water, which can effectively solve the problem of inconvenient adjustment of the pressure in the columnar container in the background technology, and can fix the pressure value after the pressure in the columnar container is adjusted properly, and the operation is more convenient

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