Thread plug-in mounting type pilot overflow valve capable of conducting pressurizing
A technology of pilot-operated relief valve and threaded cartridge, which is applied in the direction of fluid pressure actuating device, valve detail, valve device, etc., and can solve the problems that the relief valve cannot be changed to adjust the power output and affect the working efficiency of hydraulic machinery.
Pending Publication Date: 2021-04-20
NANYUE FUEL INJECTION SYST CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to solve the disadvantage that the existing hydraulic system overflow valve cannot adjust the power output according to the load change, which seriously affects the working efficiency of hydraulic machinery, and provides a new type of pressurized threaded plug-in pilot relief valve
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Embodiment Construction
[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0015] see figure 1 , the pressurized threaded cartridge pilot relief valve shown in the figure includes pilot valve parts and relief valve parts.
[0016] The overflow valve component includes a valve sleeve 9 and a main valve core 10 slidingly arranged in the valve sleeve 9. A damping hole 10a axially penetrating through the entire main valve core 10 is arranged in the main valve core 10; There is a high-pressure oil oil inlet A, and a circle of relief valve oil return port B is arranged at the lower part of the sleeve wall of the valve sleeve 9, and the relief valve oil return port B is connected to the oil tank through an oil pipe.
[0017] Pilot valve components include a valve body 4 and a pressure regulating body part installed in the valve body 4 from top to bottom, a pressure regulating spring 17 and a pilot valve core 16. The lower ...
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The invention discloses a thread plug-in mounting type pilot overflow valve capable of conducting pressurizing. The thread plug-in mounting type pilot overflow valve comprises a pilot valve component and an overflow valve component. The pilot valve component comprises a valve body, a pressure regulating body component, a pressure regulating spring and a pilot valve element, the pressure regulating body component, the pressure regulating spring and the pilot valve element are installed in the valve body, the pressure regulating body component comprises a pressure regulating screw and a boosting piston, and the boosting piston is connected with the pilot valve element through the pressure regulating spring. A pilot oil port and a pilot valve oil return port are formed in the valve body, the pilot valve oil return port is connected with an oil tank through an oil pipe, and a cavity in the upper portion of the boosting piston communicates with a pilot oil way through the pilot oil port. When the pressure of a system needs to be increased, an equipment operator inputs a pressurization signal to open a hydraulic valve connected with the pilot oil port, pilot oil enters the cavity in the upper portion of the boosting piston through the pilot oil port, the boosting piston is pushed to move downwards, the set pressure of the pressure adjusting spring rises, and the pilot valve is in a high-pressure set state; and the thread plug-in mounting type pilot overflow valve capable of conducting pressurizing adjusts the working pressure according to different working conditions.
Description
technical field [0001] The invention relates to the technical field of relief valves, in particular to a pressurized threaded plug-in pilot relief valve. Background technique [0002] At present, hydraulic machinery, especially construction machinery, has a harsh working environment, large load changes, and severe impacts in the hydraulic system during the working process. As a pressure stabilization, overflow, and safety protection component, the overflow valve is used in many routes of the hydraulic system. The existing overflow valve cannot adjust the power output according to the load change, which seriously affects the working efficiency of the hydraulic machine. Contents of the invention [0003] The purpose of the present invention is to solve the disadvantage that the existing hydraulic system overflow valve cannot adjust the power output according to the load change, which seriously affects the working efficiency of the hydraulic machine, and provides a new type o...
Claims
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IPC IPC(8): F15B13/02F15B20/00F16K31/363
Inventor 欧阳玲湘易斌邓飞黄民备龙美彪刘小军
Owner NANYUE FUEL INJECTION SYST CO LTD