Pressure balance valve for hot scarfing machine

Abstract

The invention relates to a pressure balance valve for a hot scarfing machine. The valve is composed of a valve body, a valve cover, a nozzle and a diaphragm assembly, wherein the diaphragm assembly is composed of a diaphragm, a sealing copper plate and a diaphragm pressing plate, a central threaded interface of the valve body is a medium outlet, one end of the nozzle extends into the central threaded interface of the valve body, and a gasket is arranged at the joint between the nozzle and the valve body to ensure the sealing of the nozzle and the valve body; the diaphragm assembly is arranged at the other end of the nozzle, the edge of the diaphragm is attached to the valve body, the sealing copper plate is arranged at the attaching position of the diaphragm and the valve body, the valve body is covered with the valve cover, the valve cover is fixed to the valve body through hexagon bolts, and therefore it is guaranteed that the pressure balance valve is sealed and free of leakage; and the diaphragm divides the valve body, the valve cover and the nozzle into three cavities, namely a medium upstream cavity, a control air source cavity and a discharge cavity. The valve has the remarkable advantages of compact structure, sensitive adjustment, wide application range, large flow and durability.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a pressure balance valve with sensitive adjustment, wide application range, large flow rate and durability, which is used for flame cleaning machines. Background technique [0002] Thanks to the strong demand for high-end cold-rolled sheets such as automotive sheets and home appliance sheets in industries such as home appliances, automobiles, and metal packaging, the application of flame cleaning machines in major domestic steel mills has sprung up. The flame cleaning machine uses flame to remove the 2.5-4.5mm surface of the slab, leaving a bright mirror-like surface, thereby improving the surface quality of the slab, which is the key to the quality certification of high-end cold-rolled sheets such as automobile sheets and home appliance sheets. [0003] During the cleaning process of the flame cleaning machine, the burner is attached to the surface of the slab. Howeve...

AI Technical Summary

Problems solved by technology

Generally, the balance valve is equipped with a pressure regulating spring, and an additional spring force is required during the pressure balance process of exhaust or suffocation, and the sensitivity is limited.

[0006] 2. Large instantaneous flow

During the cleaning process of the flame cleaning machine, the burner is in the process of high-frequency sinusoidal periodic fluctuations that stick to the surface of the slab and slightly detached from the surface of the slab. The diaphragm and sealing parts have high vibration frequency, are easily damaged, and have a short life.

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