A high-pressure large-displacement safety relief valve

Abstract

The invention discloses a high-pressure large-displacement safety relief valve which comprises a valve body, a valve cover and a jacking component; the valve body is provided with a relief hole; the relief hole is internally provided with a valve clack; the valve clack is provided with a center hole matched with the relief hole; the two ends of the valve body is provided with an air inlet and an air outlet respectively; the air inlet, the relief hole, the center hole and the air outlet are sequentially communicated with one another; the valve cover is internally provided with a first spring; the jacking component is arranged in the valve body and comprises a supporting seat connected with the bottom of the first spring and an ejector pin used for blocking the center hole; the supporting seat is at least partially arranged on the top of the air inlet; and the tail end of the ejector pin is in an arch shape. For the high-pressure large-displacement safety relief valve provided by the invention, main sealing is in a spherical hard sealing structure type, is in line contact and can reduce a valve rod axial acting force required for sealing; the high-pressure large-displacement safety relief valve has a compact structure, can reduce valve surface damages caused by sagging of impurities and accords with the refractory requirement; and after ball sealing abrasion, the sealing surfacecan move downward along the sealing spherical surface, automatically realizes compensation and improves the sealing reliability of the main valve surface.

Description

Technical field [0001] The invention relates to the field of valves for ships' high-pressure air systems, in particular to a high-pressure and large-displacement safety relief valve. Background technique [0002] The safety relief valve is a safety valve installed on a pressure vessel or valve cavity. When the medium pressure of the pipeline valve rises above the allowable value, the valve opens to relieve the pressure in the middle cavity. When the pressure drops to the allowable value When, the valve automatically closes again. [0003] The safety relief valve used on active submarines is essentially the back pressure valve in the high-pressure air drying filter device. Due to the working principle of the back pressure valve, it is not suitable for use as a safety relief valve. In actual use, it is found that its sealing performance is poor and reliable Sex does not meet the system requirements. At the same time, the material of the main parts of the back pressure valve has lim...

AI Technical Summary

Problems solved by technology

[0003] The safety relief valve used on active submarines is essentially a back pressure valve in a high-pressure air drying filter device. Due to the working principle of the back pressure valve, it is not suitable for use as a safety relief valve. In actual use, it is found that its sealing performance is poor and reliable. The performance does not meet the system requirements

At the same time, the corrosion resistance of the main parts of the back pressure valve is limited, which cannot meet the conditions of submarine use

Images