Instrument for exploring relationship between pressure and flow rate

Abstract

The invention discloses an instrument for exploring the relationship between pressure and a flow rate. The instrument for exploring the relationship between the pressure and the flow rate is characterized by being a plastic pipe with the length of 1m to 3m. A mesh bag is bound at the tail end of the plastic pipe. A balancing weight is further bound at the tail end of the plastic pipe. A pulling rope is tied on the balancing block. After the structure is adopted, one side of the plastic pipe is held by one hand so as to enable an opening of the plastic pipe to be close to light and small objects such as paper scraps and unaerated balloons which are arranged on a tabletop, the other hand holds the other side of the plastic pipe and rapidly shakes the plastic pipe, and due to the facts that the air flow rate at the position of the opening of the plastic pipe is high and the pressure at the position of the opening of the plastic pipe is small, the light and small objects are sucked into the pipe, move and are collected to the mesh bag. The instrument for exploring the relationship between the pressure and the flow rate has the advantages that visibility is large by shaking the plastic pipe for a test, and interests of students are high; due to the facts that the pipe is longer and the balancing weight is further arranged, shaking is fast, an effect is good, and a test success rate is high; even if the superficial area of one unaerated balloon is larger than the cross-sectional area of the pipe, the balloon can successfully enter the mesh bag; the instrument is simple in structure, low in cost, remarkable in effect and easy to popularize.

Description

[0001] technical field [0002] The invention relates to a physical mechanics teaching instrument, in particular to an instrument for exploring the relationship between pressure and flow velocity. [0003] Background technique [0004] The existing middle school experiment on the relationship between pressure and flow velocity is a key experiment, and there are many experimental methods, but there is a lack of large-scale, attractive to students, low cost, and effective experimental methods. [0005] Contents of the invention [0006] The purpose of the present invention is to provide a large-scale, highly attractive to students, low cost and good effect exploring instrument for the relationship between pressure and flow velocity. [0007] The technical solution adopted in the present invention is: an instrument for exploring the relationship between pressure and flow velocity, which is characterized in that it is a plastic tube with a length of 1 to 3 meters. [0008]...

AI Technical Summary

Problems solved by technology

[0004] The experiment on the relationship between pressure and flow velocity in existing middle schools is a key experiment, and there are many experimental methods, but there is a lack of large-scale, attractive to students, low cost, and effective experimental methods

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