Pilot-operated type overflow valve with pressure resisting function

Abstract

The invention discloses a pilot-operated type overflow valve with a pressure resisting function. The pilot-operated type overflow valve comprises an oil inlet, an oil outlet, a main valve seat, a main valve element, a damping hole, a valve body, a main valve spring, a valve deck, a remote control port, a pilot-operated valve seat, a pressure adjusting spring, an adjusting screw and a pressure adjusting hand wheel. The valve body is provided with the oil inlet. The oil outlet is formed in the lower end of the valve body. The main valve seat is arranged at the upper end of the oil outlet. The main valve element is arranged at the upper left end of the main valve seat. The main valve spring is arranged at the upper end of the main valve seat. The damping hole is formed in the upper right end of the main valve seat. The valve deck is arranged at the upper end of the valve body. The remote control port is formed in the upper end of the valve deck. The pressure adjusting hand wheel is arranged at the upper left end of the valve body. The adjusting screw is fixed to the right end of the pressure adjusting hand wheel. The pressure adjusting spring is arranged at the right end of the adjusting screw. The pilot-operated valve seat is arranged at the right end of the pressure adjusting spring. The pilot-operated type overflow valve has the beneficial effects that the damping effect is good, noise is low, the pressure adjusting range is wide, and actions are sensitive.

Description

technical field [0001] The invention belongs to the technical field of general machinery, and in particular relates to a pilot relief valve with pressure-resistant function. Background technique [0002] 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. Relief valves generally have two structures: direct-acting relief valve and pilot relief valve. In practical applications, it is generally used as an unloading valve, as a remote pressure regulating valve, as a high and low pressure multi-stage control valve, as a sequence valve, and used to generate back pressure (in series on the oil return line). With the continuous development of society, people's requirements for relief valves are getting higher and higher, and many types of relief valves have appeared on the market. [0003] However, the current overflow valve has seriou...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a pilot-operated relief valve with anti-pressure function, so as to solve the problems in the above-mentioned background technology that the current relief valve has serious vibration, high noise, small pressure regulation range and insufficient sensitivity of action

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