Surge protection relief valve

Abstract

The invention provides a surge protection relief valve, which comprises a main valve and a pilot valve, wherein the pilot valve is positioned above the main valve; an outlet valve seat and an inlet valve seat are fixed in a cavity of a pilot valve body at an interval; and a valve shaft is connected with a pilot valve spring arranged on one side of the pilot valve. A central cavity of the pilot valve is communicated with an air chamber in the main valve by an air chamber pipe, while a rear cavity is communicated with the outlet side of the main valve by an outlet pipe. An inner core of a main valve body has an olive shape; a fixed sleeve is fixed at an inlet flange of the main valve body; and a valve seat of the main valve is pressed together with the fixed sleeve. A guide sleeve is fixed on an inner hole on the outlet side of the main valve body; the tail part of a fusiform valve clack is inserted into the guide sleeve; and the conical sealing surface of the front part of the valve clack can be sealed with the valve seat. The inner cavity of the valve clack is combined with the inner core of the main valve body to form the air chamber in the main valve. The surge protection relief valve induces the pressure of a pipeline by the mechanical pilot valve to control the movement of the valve clack of the main valve so as to realize accurate opening, fast relief and the elimination of pressure peaks during the occurrence of surges in the pipeline and play a role in safely and reliably protecting pipeline equipment.

Description

technical field [0001] The invention relates to a pressure relief valve for protecting long-distance pipelines, in particular to a water hammer protection pressure relief valve. Background technique [0002] The water hammer pressure relief valve is a pressure relief valve that can deal with water hammer, eliminate pressure peaks, and effectively protect the safe and stable operation of pipelines. The propagation of the water shock wave in the pipeline superimposes the pressurized value on the original hydraulic pressure, causing local overpressure and vibration of the pipeline, resulting in pipeline rupture, damage to equipment, and threat to pipeline operation safety. In order to effectively prevent the occurrence of water hammer pressure peaks and ensure the safe operation of long-distance pipelines, long-distance pipelines must have a complete pressure relief system. In addition to using regulating valves to adjust the pressure of inbound and outbound stations and pressu...

AI Technical Summary

Problems solved by technology

Due to the limitation of the flow channel structure, the angle relief valve provides a small amount of relief, and the noise is relatively large; the pressure relief structure with auxiliary mechanisms is complicated, and there are many control mechanisms, which not only has high cost, but also reduces the protection system of the pressure relief valve. reliability

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