Instrument of probing pressure intensity of gas in closed container

Abstract

The invention relates to the technical field of a teaching auxiliary apparatus, and specifically relates to an instrument of probing pressure intensity of gas in a closed container. The instrument ofprobing pressure intensity of gas in a closed container has the advantages of being convenient for pulling a pull bar, being relatively higher in measuring accuracy, being relatively higher in practicality, being convenient for recover the pressure intensity in the hollow cavity after usage of the instrument is completed, and being not easy to influence reuse of the instrument so as to improve theusage reliability of the instrument. The instrument of probing pressure intensity of gas in a closed container includes a box, an air pressure gauge, a piston, a connection board and a pull bar, wherein a communicating pipe is arranged at the bottom end of the box; the communicating pipe is communicated with the hollow cavity; the piston is fixed at the top end of the connection board; the top end of the pull bar is connected with the bottom end of the connection board; the air pressure gauge is arranged at the front side wall of the box; the measuring part of the air pressure gauge is arranged in the hollow cavity; the instrument of probing pressure intensity of gas in a closed container also includes a base plate, four groups of support bars, a servo motor, a belt, a threaded rod and ascrewed pipe; the top end of the threaded rod is connected with the bottom end of the pull bar; the bottom end of the screwed pipe is inserted into and threaded into the top end of the threaded pipe;a ventilation pipe is arranged at the right side wall of the box; and a shield cover is hinged to the right side wall of the ventilation pipe.

Description

technical field [0001] The invention relates to the technical field of teaching aids, in particular to a gas pressure explorer in a closed container. Background technique [0002] As we all know, the gas pressure probe in a closed container is a device that is convenient for students to understand relevant knowledge when teaching relevant knowledge, and is widely used in the field of teaching related knowledge; the existing gas pressure probe in a closed container includes a box, Barometer, piston, connecting plate and pull rod, the box is provided with a cavity, the bottom of the box is provided with a connecting pipe, and the connecting pipe communicates with the cavity, the connecting plate is located in the connecting pipe, the The piston is fixed on the top of the connecting plate, the top of the pull rod is connected to the bottom of the connecting plate, the air gauge is installed on the front side wall of the box, and the measuring part of the air gauge is located in...

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Problems solved by technology

[0002] As we all know, the gas pressure probe in a closed container is a device that is convenient for students to understand relevant knowledge when teaching relevant knowledge, and is widely used in the field of teaching related knowledge; the existing gas pressure probe in a closed container includes a box, Barometer, piston, connecting plate and pull rod, the box is provided with a cavity, the bottom of the box is provided with a connecting pipe, and the connecting pipe communicates with the cavity, the connecting plate is located in the connecting pipe, the The piston is fixed on the top of the connecting plate, the top of the pull rod is connected to the bottom of the connecting plate, the air gauge is installed on the front side wall of the box, and the measuring part of the air gauge is located in the cavity; this airtight container When the internal gas pressure probe is in use, pull the pull rod to discharge the gas in the cavity, thereby changing the air pressure in the cavity, and use the barometer to measure the air pressure in the cavity; however, the gas in this airtight container During the use of the pressure explorer, it is found that it is inconvenient to pull the pull rod, the measurement accuracy is low, and the practicability is low; moreover, it is not convenient to restore the air pressure in the cavity after use, and it is easy to affect its reuse. resulting in lower reliability

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