Gas power vacuum generating unit and using method

Abstract

The invention discloses a gas power vacuum generating unit and a using method. The gas power vacuum generating unit has the advantages that a system only consumes gas power, through the passage design of a two-position five-way (four-way) electromagnetic valve and a normally-open pneumatic valve, the pneumatic valve and a vacuum suction gas source are staggered, and therefore the pressure requirement of a gas source is lowered. The two-position five-way (four-way) electromagnetic valve is controlled to be powered off, a normally-open pneumatic valve cylinder overcomes the pressure of a spring cavity, the valve is closed, connection with a sucked cavity is cut off, a gas source pipeline of a vacuum generator is in an open circuit, and the whole unit is in a non-suction state. After the two-position five-way (four-way) electromagnetic valve is powered on, gas flows to the vacuum generator to serve as the power gas source for vacuum suction, the normally-open pneumatic valve cylinder communicates with the atmosphere without pressure, under the action of spring force, the pneumatic valve is opened, the sucked cavity is connected, and normal vacuum suction can be achieved. The whole gas circuit structure is simple and reasonable and can be widely applied to the vacuumizing fields of water pump starting, MBR water producing pipes and the like.

Description

technical field [0001] The invention relates to the technical field of pneumatic units, in particular to a gas-powered vacuum generator unit and a method for using it. Background technique [0002] 1. Pump start [0003] When the water pump is stopped and started, the impeller part must be submerged in water, otherwise it cannot start and work normally when pumping air. The usual design is to install the pump below the liquid level of the pumped medium. When the liquid level of the pumped medium is lower than the ground, it is necessary to dig a foundation pit and make a foundation to install the pump. [0004] In order to reduce the cost of civil construction and reduce the difficulty of maintenance operations under the foundation pit, when the pump is installed on the ground and can pump the pumped medium below the ground level, it is necessary to partially vacuum the pump impeller chamber so that the pipeline is pumped. The liquid level of the suction medium rises and ...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a gas-powered vacuum generator set, which has the advantages of low energy consumption, easy operation by users, and convenient maintenance in the later stage, and solves the problems of high energy consumption, large amount of maintenance, and inconvenient use by users. The problem

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