Self-expanding control method of fire hydrant based on Bernoulli's principle

Abstract

The invention discloses a self-stretching-contracting control method for a Bernoulli-principle-based fire hydrant. The self-stretching-contracting control method has the steps that a first valve is opened, and water flow enters a first high-pressure water outlet pipe through a water supply pipeline; water flow pushes a high-pressure water outlet pipe to move toward the water outlet end of the first high-pressure water outlet pipe, water and / or air in a water containing cavity enter / enters a water storage mechanism, the first high-pressure water outlet pipe communicates with a second high-pressure water outlet pipe, water flow enters the second high-pressure water outlet pipe, a second valve is opened, the water flow is discharged through the second valve through the second high-pressure water outlet pipe, an opening-closing mechanism is in a transition state, a telescopic water outlet pipe is still in a stretching state, but water stops flowing out from the telescopic water outlet pipe; the first valve is closed, and the water flow enters the water containing cavity; and the water flows pushes the second high-pressure water outlet pipe to move toward the water inlet end of the first high-pressure water outlet pipe, communicating of the first high-pressure water outlet pipe and the second high-pressure water outlet pipe is stopped, water stops flowing out from the second high-pressure water outlet pipe, water and / or air in the transition cavity enter / enters the water storage mechanism, the second high-pressure water outlet pipe contracts into the first high-pressure water outlet pipe, and the second valve is closed.

Description

technical field [0001] The invention relates to a telescopic method of fire fighting equipment, in particular to a telescopic method of a fire hydrant. Background technique [0002] While fire brings convenience to human beings, it also brings great disasters to human beings. Fire hydrant is a necessary fire-fighting facility in a city, which marks the development speed of a city. Fire-fighting facilities in cities are generally located above the ground, and often Crashed or even crashed by passing vehicles, the damaged fire hydrant will discharge a large amount of water, which not only affects urban traffic and urban beautification, but also wastes water resources. Fire rescue has brought huge threat to people's life and property safety. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the object of the present invention is to provide a telescopic method for fire hydrants. [0004] In order to realize the above-mentioned technical ...

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Problems solved by technology

[0002] While fire brings convenience to human beings, it also brings great disasters to human beings. Fire hydrant is a necessary fire-fighting facility in a city, which marks the development speed of a city. Fire-fighting facilities in cities are generally located above the ground, and often Crashed or even crashed by passing vehicles, the damaged fire hydrant will discharge a large amount of water, which not only affects urban traffic and urban beautification, but also wastes water resources. fire rescue, which poses a huge threat to the safety of people's lives and property

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