Pilot operated compound relief valve

Abstract

The invention discloses a pilot operated compound relief valve which comprises a valve body. The pilot operated compound relief valve is characterized in that the valve further comprises a main valve element and a pilot valve element, a flow inlet and a flow outlet are formed in the valve body, the main valve element is arranged in the valve body, a main valve spring connected with the inner wall of the valve body is arranged in the main valve element, the pilot valve element is arranged in the valve body space at the upper end of the main valve element, the outer circle of the pilot valve element is sleeved with a pilot valve spring connected with the inner wall of the valve body, a through hole capable of being communicated with the flow inlet is formed in one side of the main valve element, and the through hole runs through the position of the pilot valve element through a flow channel in the valve body. The pilot operated compound relief valve solves the problems that an overflow valve is complex in structure, a valve element is prone to damage, the service life is short, a good overflow effect cannot be achieved, the overflow valve operates independently and cannot be effectively controlled through other devices, and the pressure of a valve element cannot be adjusted, and the pilot operated compound relief valve is simple in structure, convenient to use and capable of overflowing rapidly and stably, and achieving remote control and adjusting.

Description

[0001] technical field [0002] The invention relates to a valve, in particular to a pilot relief valve. Background technique [0003] The relief valve is a hydraulic pressure control valve, which mainly plays the role of constant pressure relief, pressure stabilization, system unloading and safety protection in hydraulic equipment. In the metering pump throttling regulation system, the metering pump provides a constant flow. As the system pressure increases, the flow demand decreases. At this time, the relief valve is opened to make the excess flow overflow back to the oil tank, so as to ensure the inlet pressure of the relief valve, that is, the pressure at the pump outlet is constant (the valve port often opens with pressure fluctuations). Pressure stabilization function: The relief valve is connected in series on the oil return line, the relief valve generates back pressure, and the stability of the moving parts is increased. System unloading function: The remote cont...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the complex structure of the overflow valve in the prior art, the valve core is easily damaged, the service life is short, it cannot play a good overflow effect, and it operates alone, it cannot be effectively controlled by other equipment, and the pressure of the valve core cannot be adjusted. , the scope of application is small, the present invention provides a simple structure, easy to use, can quickly and stably overflow, and can realize remote control and adjust the pilot relief valve

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