Air cylinder type injection valve

Abstract

The invention provides an air cylinder-type jet valve, which comprises a valve seat, a valve head seat, a valve plug and a valve head. The valve seat is fixedly connected with the valve head seat, and the valve plug and the valve head can move relative to the valve head seat. The valve plug is arranged inside an air cylinder in a sliding way. The air cylinder-type jet valve also comprises a valve spud and a nozzle holder. The nozzle holder is fixedly connected with the valve seat, and then the nozzle holder and the valve seat are fixed on the front end of a jet beam. The valve seat extends inside the valve spud through the jet beam. The valve spud seat is fixed on the back end of the jet beam. The invention is opened and closed through the movement of a piston; the valve head is under the floating state to ensure that the valve head is aligned automatically and is reliably sealed when the valve head touches the valve seat. The requirement for the pressure of the air supply is reduced; even when the pressure of the oil source is high, the air supply can not be treated specially. Excluding valve spud, the entire jet valve can be taken out from the front end of the jet beam. Accordingly, the invention is overhauled conveniently and the service life of the invention is long.

Description

technical field [0001] The invention relates to a spray valve, in particular to a spray valve used as a process lubricating cooling system on a nonferrous metal processing plate, strip and foil rolling mill. Background technique [0002] Usually the valve is installed in the injection beam body, and the driving element of the valve can move between the open and closed positions according to the application. The traditional injection valve is used in the pressure accumulation type injection system. The valve body structure includes a control room, the injection medium is input into the control room, and the injection valve is installed on one side of the control room, and its outlet is connected with the throttling injection channel. The injection medium is in the The accumulation in the control chamber forms a high pressure, and when the injection valve is opened, the high-pressure medium is ejected from the injection channel. [0003] At present, in the domestic non-ferrou...

AI Technical Summary

Problems solved by technology

From a structural point of view, the thin-film injection valve relies on the movement of the diaphragm to realize the switch and seal. During use, due to assembly or diaphragm damage, the switch failure and poor sealing often occur, and rolling oil will escape into the compressed air and follow the compression. Air enters the air valve, causing waste and pollution of rolling oil

If the rolling oil has impurities, it will also cause the air valve to not work properly

Therefore, due to its structure, processing and assembly, film materials and other reasons, the performance and life of the thin-film jet valve are difficult to meet the requirements of the roll cooling control.

[0004] In order to replace this thin-film injection valve, the applicant applied for a cylinder-type injection valve with the patent number ZL200620125640 on December 4, 2006, which has greatly improved performance and service life, but it needs to be disassembled and repaired from the rear end of the injection beam

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