Pilot piston type stop valve adapted to perpendicular pipeline

Abstract

The invention discloses a pilot piston type stop valve adapted to a perpendicular pipeline. The pilot piston type stop valve comprises a valve body upper cover, a valve body medium sleeve, a valve body lower cover, a piston type valve element, a valve seat, a pilot valve and a buffer sleeve, wherein the valve body upper cover, the valve body medium sleeve and the valve body lower cover are connected in sequence from top to bottom; a guide sleeve is mounted in the valve body medium sleeve and is connected with the piston type valve element through ribbed plates; the ribbed plates are uniformly arranged in the radial direction; springs and the buffer sleeve are mounted in the piston type valve element; the springs are located above the buffer sleeve; the pilot valve is mounted on one side of the valve body upper cover; a piston type valve element cover is mounted above the guide sleeve and is connected with the pilot valve through a pilot pipe; a water inlet is formed in the lower part of the valve body lower cover; a water outlet is formed in the top of the valve body upper cover. The pilot piston type stop valve adopts the piston type valve element, so as to solve the problem that the pilot type stop valves cannot be used perpendicularly and expand the adaption range of the stop valves.

Description

【Technical field】 [0001] The invention relates to the technical field of shut-off valves, in particular to the technical field of pilot piston type shut-off valves suitable for vertical pipelines. 【Background technique】 [0002] The globe valve is an indispensable control element in the pipeline of the process industry, which is used to control the on-off of the fluid in the pipeline. At present, there are mainly two control methods for the opening and closing of globe valves: mechanical manual rotation and electric control. The opening and closing of mechanical manual rotary globe valves is slow; due to the complicated structure, electric globe valves increase in size and cost. In order to avoid the above disadvantages, a pilot-operated stop valve was invented. The existing pilot piston type stop valve controls the opening and closing of the pilot valve, and utilizes fluid pressure, piston gravity and spring force to realize the opening and closing of the main valve, which...

AI Technical Summary

Problems solved by technology

In order to ensure that the direction of piston movement is vertical, the existing valves of this type can only be installed in horizontal pipelines, and cannot be used in vertical or inclined pipelines

[0003] In the existing pilot-operated globe valves, the valve control part is generally placed outside the pipeline, and the control of the pilot valve generally adopts manual, electric, hydraulic and linkage driving methods, among which the speed of manual control is slow and the degree of automation is not high. However, other methods have the disadvantages of complicated mechanism and high energy consumption.

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