Cartridge valve cover plate device

Abstract

The invention provides a cartridge valve cover plate device. The cartridge valve cover plate device comprises a cover plate body, a threaded cartridge type hydraulic reversing valve, an external control oil way and an internal control oil way; the cover plate body is provided with the threaded cartridge type hydraulic reversing valve, and the internal control oil way is arranged in the cover platebody; the external control oil way comprises an X pilot control oil way; and the internal control oil way comprises a first hole channel, a Z1 pilot control oil way, a Z2 valve element locking oil way and a Y oil drainage opening oil way. When pilot control oil is fed back to a port a of the threaded cartridge type hydraulic reversing valve through the Z1 pilot control oil way through a port X ofa bottom plate of the valve body, a valve element of the threaded cartridge type hydraulic reversing valve is located at the left position, at the moment, a port I communicates with a port III, and aport AB of a main oil way is communicated; when pilot control oil is not given, the threaded cartridge type hydraulic reversing valve returns to the original position, the main valve element of the main oil way is pressed on the valve seat to cut off an opening AB of the main oil way, the pressure maintaining effect is achieved, the damage rate of the hydraulic control one-way valve is effectively reduced, and the cartridge valve cover plate device has the advantages of being resistant to impact, small in leakage amount, capable of effectively maintaining pressure and long in service life.

Description

technical field [0001] The invention belongs to the technical field of hydraulic equipment, and in particular relates to a cartridge valve cover plate device with a reliable pressure maintaining function. Background technique [0002] The hydraulically controlled one-way valve of the cooling bed hydraulic station ensures that the oil circuit is opened when the cooling bed rises, and the oil return circuit of the hydraulically controlled one-way valve is closed after the cooling bed rises to the upper limit, which maintains the pressure of the oil cylinder and prevents the cooling bed from falling. [0003] At present, the hydraulically controlled one-way valve core of the cooling bed hydraulic station is a built-in valve block, which does not have strong impact resistance. Due to the harsh working environment on site, the hydraulic control check valve often has damage to the spring and broken valve core during use, which cannot realize the pressure maintaining function of th...

AI Technical Summary

Problems solved by technology

Due to the harsh working environment on site, the hydraulic control check valve often has damage to the spring and broken valve core during use, which cannot realize the pressure maintaining function of the oil cylinder, causing the cooling bed to automatically drop when it rises to the upper limit, resulting in the billet hanging post bending deformation

Not only does it cause great damage to the cooling bed equipment, but it also has a serious impact on the quality of the billet

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