A solenoid valve box oil circuit switching device

Abstract

A solenoid valve box oil circuit switching device solves the problem of large leakage in the existing oil circuit switching device, so that the main and backup oil supply sources of the solenoid valve box do not mix oil with each other, and is suitable for aerospace, ships, petrochemicals Oil circuit control of various pipeline systems in many industries. The invention includes an integrated valve block, two hydraulic control one-way valves, two one-way valves and one electromagnetic ball valve; the hydraulic control one-way valve, one-way valve and electromagnetic ball valve are all seat structures. The two hydraulically controlled one-way valves are installed on the pressure oil inlet and the oil return inlet of the integrated valve block by screw insertion, and the two one-way valves are installed on the pressure oil outlet and the oil return inlet of the integrated valve block by screw insertion. Back to the oil outlet. The invention has extremely low internal leakage, and can effectively prevent the main and backup oil supply sources of the electromagnetic valve box from being oily with each other.

Description

technical field [0001] The invention relates to an oil circuit switching device for an electromagnetic valve box, in particular to an oil circuit switching device for a main and a backup oil source of an electromagnetic valve box. Background technique [0002] In aerospace, shipbuilding, petrochemical and other related industries, hydraulic valves are widely used in various pipeline systems, and solenoid valve boxes are also widely used as centralized control equipment for hydraulic valves. In order to ensure the normal operation of the solenoid valve box, two oil sources are usually provided for the solenoid valve box. The circuit switching device can realize remote control switching of the oil supply source of the solenoid valve box. At present, oil circuit switching devices at home and abroad usually use a two-position six-way spool valve to realize the switching function of the oil circuit. There are also many patented technologies for the spool valve, such as the "a ki...

AI Technical Summary

Problems solved by technology

At present, oil circuit switching devices at home and abroad usually use a two-position six-way spool valve to realize the switching function of the oil circuit. There are also many patented technologies for the spool valve, such as the "a kind of Spool type directional valve" utility model, patent number 201410468869 disclosed "a spool type directional valve" invention patent, patent number 201420329025 disclosed "a spool type directional valve" utility model, patent number 201420202645 disclosed The main disadvantage of this spool valve type oil circuit switching device is: the internal leakage of the spool valve type directional valve is large, which leads to oil leakage between the two oil supply sources; in addition, The fit gap between the spool of the spool valve and the valve body is very small, and the small impurity particles in the oil are likely to cause the spool to be stuck. Therefore, the anti-pollution ability of this oil circuit switching device is not strong

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