Mute steam blow through valve

Abstract

The invention relates to a mute steam blow through valve which comprises a valve body, a hand wheel, a valve rod, a valve element, a valve rod cap, a press cap and a dual sealing assembly, wherein the lower end port of a valve cavity in the middle of the valve body is provided with a washer; the dual sealing assembly comprises a coiled spring, an upper graphite stainless steel sealing ring, a valve element sleeve and a lower graphite stainless steel sealing ring which are sequentially sleeved on the valve element and then loaded in the valve cavity in the middle of the valve body; the upper graphite stainless steel sealing ring and the lower graphite stainless steel sealing ring are respectively and tightly matched with the inner wall of the valve cavity in the middle of the valve body; the press cap is sleeved on the valve rod, and a cap bolt is fixed on the valve body; the lower end surface of the lower graphite stainless steel sealing ring is abutted against the washer, the lower end surface of the upper graphite stainless steel sealing ring is abutted against the valve element sleeve, and the lower end of the coiled spring is abutted against the upper graphite stainless steel sealing ring; the upper end of the coiled spring is abutted against the press cap; the valve rod cap is sleeved on the valve rod and connected with the outer wall of the press cap through a thread; and a nut is screwed at the upper end of the valve rod. The mute steam blow through valve has the advantages of good sealing property and long service life.

Description

technical field [0001] The invention relates to valves, in particular to a novel silent steam blow-off valve. Background technique [0002] In marine steam pipes, accessories, and steam turbine cylinders, there is a certain amount of steam-water mixture in the warm-up pipe, warm-up and shutdown. In order to blow off these steam-water mixtures to the hot well unit, a steam blow-off valve is required. In addition, when the current standard globe valve is blown off by steam, when the high-speed steam-water mixed flow flows through the valve, the airflow flows from the disc and the valve seat to the back of the valve, and a variety of unstable flows are generated near the valve port, such as jet flow. , Boundary layer separation flow, vortex flow, shock wave, etc. These unstable flows are the source of strong noise, and the blowing noise is large, causing noise pollution to the crew. For this reason, a new type of silent steam blowing valve is developed to solve this technical ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a silent steam blow-off valve to solve the problem of high blow-off noise of the original stop valve, and to recognize the mechanism of vibration and noise through the analysis of the principle, structure and noise of the steam blow-off valve , using theoretical analysis and calculation to design the blow-off valve, and through the comparative test with the original cut-off valve, under the specified steam flow and pressure, the newly developed silent steam blow-off valve can reduce the exhaust air noise by more than 8dB(A)

Images