A positive and negative pressure water hammer control valve group of airbag type ventilating and draining type

Abstract

The invention discloses an airbag type ventilation and drainage positive and negative pressure water hammer control valve group. The airbag type ventilation and drainage positive and negative pressure water hammer control valve group is arranged on an infusion pipeline or a container system and comprises a water hammer relief valve, a trace exhaust valve, a high-speed exhaust valve, a rear regulating valve, a negative pressure air suction valve, a manual venting and draining valve and a monitoring pressure gauge; the rear regulating valve is arranged at the outlet end of the high-speed exhaust valve; the water hammer relief valve is directly connected with the top or the lateral side of the negative pressure air suction valve through threads or a flange; the trace exhaust valve is connected with a hole which is formed in the front of the water hammer relief valve; the high-speed exhaust valve is directly connected with the top or the lateral side of the negative pressure air suction valve through threads or a flange; the negative pressure air suction valve is connected with the external infusion pipeline. According to the airbag type ventilation and drainage positive and negative pressure water hammer control valve group which is integrated and omni-directional, the structure is compact and firm, the conveying and the installation are convenient, the reliability is strong, the positive pressure water hammer can be relieved, the relief speed is high, and the water hammer of cavities collapsing due to the negative pressure can be inhibited.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an airbag type ventilating and draining type positive and negative pressure water hammer control valve group. Background technique [0002] Most of the existing water hammer relief valves are only of the discharge type, which can only relieve part of the positive pressure water hammer, but are powerless to bridge the water hammer caused by the negative pressure or called the negative pressure water hammer or the extreme water hammer. [0003] Water pipelines and pumping station systems are prone to a certain degree of negative pressure vacuum and bridging water hammer when the pump is stopped and the valve is opened or closed, or the valve is adjusted. Typical examples are the downstream of the check valve of the water outlet branch pipe of the water pump. After the pump is stopped, the check valve It is usually closed in two stages. In the initial stage, it usually closes 70-95% ...

AI Technical Summary

Problems solved by technology

Therefore, ordinary positive pressure water hammer protection equipment can only release the last positive pressure water hammer, and has almost no effect on the negative pressure and bridging water hammer in the previous stage. It only provides partial protection for the system, and the system still exists greater risk

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