Seawater corrosion resistant pressure-balanced valve

Abstract

The invention aims at providing a seawater corrosion resistant pressure-balanced valve. The seawater corrosion resistant pressure-balanced valve comprises a valve seat, a valve core, an oil bag, a spring, a snap ferrule type three-way joint and a conical threaded pipe joint, wherein the slide valve type valve core and the valve seat form a radial seal through an O-shaped ring; the valve seat is seated inside a valve body, one end of the valve seat serves as a water inlet, and the other end of the valve seat and the O-shaped ring form a seal; an inlet of the valve is connected to the valve body through the conical threaded pipe joint; the opening of the pressure-balanced valve is realized in a manner that the pressure of an inlet of a slide valve is higher than that of a balancing port of the slide valve; the valve core of the pressure-balanced valve adopts a slide valve type direct-acting type structure, so that the pressure-balanced valve is high in responding speed and small in pressure overshoot. According to the seawater corrosion resistant pressure-balanced valve, the structure is novel and compact, the controllability of water charging / discharging of a system can be guaranteed, the vibration of the valve core is relatively low, the pressure of the inlet and an outlet is stable, the spring is immersed into oil of the oil bag, and thus, the seawater corrosion prevention for the spring is realized; the seawater corrosion resistant pressure-balanced valve has the advantages of low cost, easiness in mounting and the like.

Description

technical field [0001] The invention relates to a valve, in particular to a balance valve for underwater operation. Background technique [0002] With the deepening of human development and utilization of the ocean, the development of water hydraulic systems is getting better and better, which puts forward higher requirements for the structure and function of underwater manipulators. The seawater hydraulic buoyancy adjustment system has been successfully applied to underwater vehicles, and its working principle is as follows: figure 1 shown. according to figure 1 It can be obtained that the operation of the seawater pump in the buoyancy adjustment system controls the flow direction of the water medium through the reversing valve, so as to realize the filling and drainage of the pressure-resistant water tank in the buoyancy adjustment system, so as to change the weight of seawater in the water tank, and realize the water flow of the underwater vehicle. buoyancy. [0003] ...

AI Technical Summary

Problems solved by technology

The first type of pressure balance valve is sealed with a cone surface. The spring is corroded by seawater after working for a long time in the seawater medium, and it is prone to leakage.

The second type adopts rigid seal and the valve core is seriously damaged after long-term work. The spring is exposed to seawater, and the opening pressure accuracy of the valve decreases after being corroded by seawater.

Images