Multi-stage logic unloading valve and hydraulic system
An unloading valve and logic technology, applied in the field of hydraulic system, can solve the problems of short service life of unloading valve and easy damage of hydraulic system, and achieve the effect of improving service life, protecting hydraulic system and reducing impact.
Active Publication Date: 2018-07-17
青岛海德马克智能装备有限公司
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[0005] The purpose of the present invention is to provide a multi-stage logic unloading valve and a hydraulic system, so as to alleviate the technical problems of the unloading valve in the traditional hydraulic system, which have a short service life and the hydraulic system is easily damaged
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[0041] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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The invention provides a multistage logic unloading valve and a hydraulic system, and relates to the technical field of hydraulic systems. The multistage logic unloading valve comprises a shell provided with an oil inlet and an oil outlet, a pressure relief cartridge valve, a discharge cartridge valve and a pilot cartridge valve, which are arranged in the shell and is communicated with each other, a proportional overflow valve, an electronic amplifier electrically connected with the proportional overflow valve, an electromagnetic reversing valve, a pressure sensor arranged in an oil inlet cavity of the discharge cartridge valve and a controller eclectically connected with the pressure sensor. The hydraulic system comprises the multistage logic unloading valve. According to the multistage logic unloading valve and the hydraulic system provided by the invention, the hydraulic system is unloaded in a manner of first pressure relief and then discharge, thereby solving the technical defects of short service life of the unloading valve in the traditional hydraulic system and proneness of the hydraulic system to damage, and effectively reducing the impact caused when the cartridge valve with a large drift diameter, thus therefore the service life of the cartridge valve with the large drift diameter is prolonged, and the hydraulic system is protected.
Description
technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a multi-stage logic unloading valve and a hydraulic system. Background technique [0002] Hydraulic systems are generally equipped with unloading valves; among them, in hydraulic systems with high pressure and large flow, large diameter cartridge valves are usually used to realize the discharge. [0003] However, the traditional large-diameter cartridge valve does not have a pressure relief process, but directly releases pressure and flow through a large opening; in this way, when the inlet and outlet of the main oil circuit are connected, the impact on the cartridge valve is too large, which greatly reduces the pressure on the cartridge valve. The service life of the large diameter cartridge valve will be shortened, and at the same time, the hydraulic system will be damaged due to impact. [0004] To sum up, how to overcome the above-mentioned defects of the tradition...
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IPC IPC(8): F15B20/00F15B13/02
CPCF15B13/024F15B20/00
Inventor 王安基
Owner 青岛海德马克智能装备有限公司