Pressure and temperature regulating steam valve

Abstract

The pressure and temperature regulating steam valve comprises a valve body and a valve cover, a hollow cavity and a sleeve are arranged in the valve body, the upper end and the lower end of the sleeve are in sealing fit with the upper inner wall and the lower inner wall of the hollow cavity, a valve rod is arranged in the sleeve in a sleeved mode, and a sleeve boss and a sleeve groove are formed in the inner wall of the sleeve; a valve rod groove and a valve rod boss are arranged on the outer wall of the valve rod, when the valve is in a closed state, the cross section of the valve rod boss and the cross section of the sleeve boss are completely sealed by the valve rod boss, and when the valve is in an open state, the valve rod boss is in clearance fit with the sleeve groove. The valve rod groove is in clearance fit with the sleeve boss, the valve body is further connected with a branch pipe, and a steam cooling nozzle is arranged on the branch pipe in a bypass mode. The steam pressure and temperature can be accurately reduced, the adjusting range is large, and the phenomena of cavitation and blocking flow are eliminated.

Description

technical field [0001] The invention relates to the technical field of valve manufacturing, in particular to a pressure-regulating and temperature-regulating steam valve. Background technique [0002] With the wide application of thermal power, chemical boilers, and steam turbines, steam is often used for heating, heat tracing, or directly participating in reactions. However, steam boilers or steam turbines produce steam with fixed pressure and fixed temperature, and steam with several different pressures and steams are often required in use, so it is necessary to adjust the pressure and temperature of the generated steam according to the needs of the engineering site to achieve Different usage requirements. [0003] At the same time, because the medium is in a high-velocity gas state during temperature and pressure regulation, which is a typical cavitation condition with high pressure difference and large flow rate, the fluid is prone to cavitation and erosion on the regul...

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Problems solved by technology

[0003] At the same time, since the medium is in a high-speed gas state during temperature and pressure regulation, it is a typical cavitation condition with high pressure difference and large flow rate, and the fluid is prone to cavitation and erosion on the regulating element.

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