Pilot bidirectional double-disc high-pressure gate valve

Abstract

The invention relates to a high-pressure gate valve which can realize pilot pressure relief and can be used bidirectionally. The gate valve comprises a valve core component, wherein the valve core component comprises a guide valve core; the guide valve core is fixedly connected with a valve rod; the valve core component also comprises a left pilot valve core and a right pilot valve core; the pilot valve cores can be axially and movably mounted on the side surface of the guide valve core; a through hole is formed in the guide valve core; a back pressure spring is arranged in the through hole; the two ends of the back pressure spring respectively act on the inner side surfaces of the left and right pilot valve cores; bulges are arranged on the outer side surfaces of the pilot valve cores; the bulges are arranged in grooves in the inner side surface of a gate plate in a matched manner; an elastic member is arranged between the outer surface of each bulge and the inner wall of the corresponding groove; a pressure relief hole is formed in the gate plate; a pressure guide hole is formed in each pilot valve core; a communication hole is formed in the guide valve core, and a chamber is communicated with the through hole via the communication hole; and the elastic member is longitudinally compressed so that the through hole, the pressure guide holes and the pressure relief hole are communicated. The gate valve is a high-pressure gate valve which can realize pilot pressure relief and can be used bidirectionally.

Description

technical field [0001] The invention relates to a valve, in particular to a high-pressure gate valve with bi-directional double discs and a pilot pressure relief function. Background technique [0002] After searching in the patent search and service system of the China Intellectual Property Office, the applicant found a utility model patent (notification number: 202914787U) entitled "Pressure-sealed pilot-operated ultra-high pressure gate valve". Relying on pressure-tight pilot-operated ultra-high pressure gate valve, this gate valve is equipped with a valve core assembly driven by a valve stem. One end of the valve core body of the valve core assembly is fixedly connected with a damping plate with a damping hole, and the other end is set There is a main valve core that slides on the inner wall of the valve core, and a pilot valve is arranged between the damping plate and the main valve core. The pilot valve is composed of a pilot valve stem and a pilot valve core, which is...

AI Technical Summary

Problems solved by technology

Although the ultra-high pressure gate valve can reduce the pressure difference between the inlet and outlet of the valve through the pilot valve, so that the gate valve can be opened and closed easily, but due to structural limitations, this high-pressure gate valve can only be used for one-way closure, that is, the high-pressure medium can only Flow from the inlet joint of the gate valve to the outlet joint, let the valve cut off in the forward direction, but not reversely let the high-pressure medium flow from the outlet joint to the inlet joint, let the valve cut off in the reverse direction, so this pilot high-pressure gate valve has certain advantages in use. limitation

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