A kind of air-to-air exhaust steam regulating valve

Abstract

The invention relates to an air steam exhaust regulating valve. The air steam exhaust regulating valve comprises a valve body (7), a valve base (5), a sleeve (8), a valve core rod (9), a valve cover (11), a combined packing (12), support vertical columns (30), an anti-rotation baffle (29), a driving part and the like, wherein the valve core rod (9) is of an integrated structure, the lower end of the valve base (5) is fixedly installed at the valve body (7), and the upper end of the sleeve (8) is fixedly installed on the valve body (7); the upper end part of the valve base (5) and the lower endpart of the sleeve (8) are tightly attached to the shrink part of the valve body (7), and a plurality of throttling holes are evenly distributed on the peripheral walls of the valve base (5) and thesleeve (8); and the valve core rod (9) is connected with the driving part through an adjusting and connecting device in a spherical hinge joint mode. A three-stage throttling structure of the hangingporous sleeve, the integrated valve core rod and the separation porous type vale base is adopted, the problems that the sealing surface of the air steam exhaust valve is easy to crack, the valve is difficult to maintain after cracking, the vibration of the valve is large, the noise is large, and leak is prone to occur are solved, so that the safety is improved, and the service life of the valve isprolonged.

Description

technical field [0001] The application relates to the field of valves, in particular to an air-to-air exhaust steam regulating valve. Background technique [0002] The air-to-air exhaust valve is installed on the firing pipeline of the steam-collecting box of the superheater of the power plant boiler. As a valve that directly discharges excess steam to the atmosphere, it is commonly used in the two working conditions of the boiler just starting and shutting down. During normal operation, when the boiler pressure rises and the boiler safety door is not expected to operate, the air-to-air exhaust valve can be used to reduce the pressure. The working condition of the air exhaust valve is very bad. It often discharges a mixture of steam and water when it is started, and it discharges high-temperature and high-pressure steam under full pressure in the working state. [0003] Generally, the air exhaust valve adopts a stop valve, and the valve seat is directly welded on the valve ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, this application provides an air-to-air exhaust regulating valve, which adopts a three-stage throttling structure that is used in conjunction with a porous sleeve and a porous valve seat, and solves the problem that the sealing surface of the air-to-air exhaust valve is easy to crack , Difficult to repair after cracking, large valve vibration, high noise, easy to leak and other problems, achieved the technical effect of improving service life and reducing maintenance costs

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