Knob-type two-way valve

Abstract

The invention specifically discloses a knob-type two-way valve comprising a valve body in which a cylindrical sunk inner cavity is formed. A rotating shaft is also rotatably connected tothe valve body, which is perpendicular to the center of the surface of revolution of the sunk inner cavity and inserted through the valve body. Steps are formed on the end of the rotating shaft that is close to the sunk inner cavity. A seal cartridge is arranged closely against the steps, which sleeves the rotating shaft and defines a circular-ring-shaped closed revolving oil cavity along with the sidewalls and bottom surface of the sunk inner cavity. The valve body is also provided with an oil inlet and an oil outlet; an oil feed aperture and an oil discharge aperture both communicating with the revolving oil cavity are formed in the seal cartridge. Two sliding flaps are connected to the rotating shaft are also arranged in the revolving oil cavity, which are dynamically sealed with both the seal cartridge and the sunk inner cavity. The two-way valve achieves normal open and normal close of the valve body by means of the rotating shaft; and compared with an existing valve, as the structure of the end face plugging connection for a valve deck is omitted, the sliding flaps may be avoided from the problem of leakage under high pressure of hydraulic oil.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a knob type two-way valve. Background technique [0002] Valves are the control components in the hydraulic system. They have the functions of cut-off, adjustment, flow diversion, anti-backflow, pressure stabilization, flow diversion, overflow and pressure relief, etc., and play a very important role in the hydraulic system. The working principle of the valve is to push the valve cover to move through the valve stem. The valve cover opens or closes the interface connecting the fluid in and out of the pipeline. The valve stem is sleeved with a spring to reset the valve stem, so that the valve is normally closed or normally open. [0003] The main technical difficulty of the valve is how to ensure the seal between the valve cover and the interface. At present, the common sealing structure on the market is the end face seal, that is, the end face of the valve cover seals th...

AI Technical Summary

Problems solved by technology

[0003] The main technical difficulty of the valve is how to ensure the seal between the valve cover and the interface. At present, the common sealing structure on the market is the end face seal, that is, the end face of the valve cover seals the interface. However, this structure can withstand too much pressure and the fluid The direction of the force acting on the bonnet is the moving direction of the bonnet. When the pressure at the fluid input end increases, the pressure difference with the fluid output end increases, which will easily cause a gap between the bonnet and the interface, resulting in valve leakage.

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