Water hammer arresting check valve

• Main Authors: JIQIANG WANG, LIANCAI WU
• Format: Patent
• Language: English
• Published: 15.10.2003
• Edition: 7
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The utility model relates to a check valve eliminating water hammers, which is composed of a base ring, an elevating valve flap, a copper sleeve, a core body, an outer shell, a resistance nozzle and a rubber pad, wherein the outer shell is made of rust preventing cast iron materials, the central position of the outer shell is provided with the core body which is in an extended water drop shape, and a tip head points to a water outlet. The tip head position pointing to the water outlet is provided with the resistance nozzle which is provided with a through hole directly communicated with a post plug of the valve flap. Different resistance values can be obtained by changing the diameter of the post plug of the elevating valve flap and the hole diameter of the through hole of the resistance nozzle. The impact of a water pump and the resistance of the through hole of the resistance nozzle can be always kept in a critical equilibrium state. The copper sleeve matched with the post plug of the back surface of the elevating valve flap is arranged in a post plug chamber in the core body. The round base ring is arranged on the water inlet position of the check valve eliminating water hammers. The utility model can be used for eliminating or basically eliminating the water hammers in a pipeline when the water pump is turned on and turned off to effectively protect the pipeline and the water pump.