Float type vacuum breaker valve

Abstract

The invention discloses a float ball type vacuum breaker valve comprising a valve body communicating with a vacuum system, a valve seat mounted on the valve body, and a guide sleeve for guiding a valve rod, wherein the guide sleeve is fastened on the valve seat. The valve seat is provided with an air intake. The valve rod runs through the guide sleeve and extends inside the valve body; and the front end of the valve rod is provided with a valve clack which is matched with the valve seat for sealing the air intake. The valve rod is fixedly connected with the valve clack to form a valve core component which is T-shaped. A spring is arranged between the guide sleeve and a spring seat. One end of the spring is in contact with the lower portion of the spring seat; and the other end is in contact with the upper portion of the guide sleeve. A cover is installed on the valve body. The cover is provided with a guide seat. The guide seat is provided with an air-liquid through hole. The float ball type vacuum breaker valve further comprises a float ball which is arranged inside the valve body. The float ball is connected with a guide rod; the guide rod is located inside a guide seat and is capable of sealing the air-liquid through hole. The combined valve can successfully solve the technical problem of the liquid leakage in the vacuum system, thereby preventing the dangerous liquid leaking outside the system to contaminate the external environment or endanger personal safety.

Description

technical field [0001] The invention relates to a floating ball type vacuum breaker valve on a vacuum system which is equipped with air suction, air release and liquid leakage prevention. Background technique [0002] The condenser system of a nuclear power plant requires a vacuum breaker valve with the functions of negative pressure suction, positive pressure exhaust and liquid leakage prevention. None of the existing breathing valves and float valves can meet the functional requirements. Although the breathing valve has the functions of negative pressure suction and positive pressure exhaust, it cannot prevent the leakage of liquid in the vacuum system. Once the dangerous liquid in the vacuum system leaks out, it will cause serious pollution to the external environment and waste the vacuum system. Liquid resources in . Although the float valve has the functions of positive pressure exhaust and liquid leakage prevention, it cannot meet the requirements of negative pressur...

AI Technical Summary

Problems solved by technology

None of the existing breathing valves and float valves can meet the functional requirements

Although the breathing valve has the functions of negative pressure suction and positive pressure exhaust, it cannot prevent the leakage of liquid in the vacuum system. Once the dangerous liquid in the vacuum system leaks out, it will cause serious pollution to the external environment and waste the vacuum system. Liquid resources in

Although the float valve has the functions of positive pressure exhaust and liquid leakage prevention, it cannot meet the requirements of negative pressure suction. Once the vacuum degree in the vacuum system is lower than the design requirements, it will cause damage to the equipment installed on the vacuum system, and even cause damage to the vacuum system. endanger personal safety

At present, there is no valve with the functions of negative pressure suction, positive pressure exhaust and liquid leakage prevention.

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