Self-operated regulating valve for boiler gas pipeline

Abstract

The invention relates to a self-operated regulating valve for a boiler gas pipeline. The self-operated regulating valve comprises a main body, an electromagnetic induction module, a piezoelectric transmitter, a controller and a pulse current generator, and is characterized in that an electromagnetic induction coil, the piezoelectric transmitter, the pulse current generator and the controller are additionally arranged on the existing self-operated regulating valve; and when a boiler combustor is closed or the upstream/downstream pipeline pressure of the self-operated regulating valve fluctuates, axial pulse electromagnetic force is applied to a valve element through the electromagnetic induction coil, and the response speed and the regulating stability of the regulating valve are improved.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a self-operated regulating valve for boiler gas pipelines. Background technique [0002] At present, as an important device for pressure control, self-operated regulating valves are widely used in gas pipelines, including boiler gas pipelines. The structure of the existing self-operated regulating valve is as follows: figure 1 shown. The existing self-operated regulating valve relies on the resultant force generated by the regulating spring, the pressure pipe before the valve, the pressure pipe after the valve, the tray and other components to change the relative position of the valve core, thereby controlling the flow of gas. When the existing self-operated regulating valve is used in the boiler gas pipeline, due to the mechanical inertia of the regulating spring, tray and other components, the response speed is slower than that of the boiler burner. When the boiler burner ...

AI Technical Summary

Problems solved by technology

When the existing self-operated regulating valve is used in the boiler gas pipeline, due to the mechanical inertia of the regulating spring, tray and other components, the response speed is slower than that of the boiler burner. When the boiler burner is closed and the boiler stops burning, the valve core usually delays for about 3s In this process, the gas will continue to enter the downstream pipeline of the self-operated regulating valve, causing the pressure of the downstream pipeline to rise instantaneously, which brings certain safety hazards. During the normal operation of the boiler, the upstream gas of the self-operated regulating valve The coupling of pressure fluctuations and the hysteresis of self-operated regulating valve adjustment will bring huge unstable factors to the adjustment of gas pressure

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