A Multifunctional Screw-in Cartridge Valve with Adjustable Opening and Closing Characteristics

Abstract

The invention discloses a multifunctional threaded cartridge valve with adjustable opening and closing characteristics. The threaded cartridge valve mainly includes: a valve sleeve, a valve core, a threaded connector, a main spring, an embedded adjustment device, a sealing ring and Retaining ring assembly; the valve sleeve, spool, threaded connector, main spring, sealing ring and retaining ring together constitute a basic type of threaded cartridge valve, which is used as an oil inlet in a system configuration The oil inlet resistance state is adjusted by the above-mentioned embedded adjustment device, so as to obtain different opening and closing characteristics, and meet the requirements of different opening and closing characteristics of the oil inlet resistance under different working conditions in the actual application of the system.

Description

technical field [0001] The invention relates to the technical field of a novel threaded cartridge valve, in particular, it is a multifunctional threaded cartridge valve with adjustable opening and closing characteristics. Background technique [0002] At present, hydraulic cartridge valves have been widely used and are being innovated and developed. Among them, in the two-way cartridge valve control (hereinafter referred to as ISO CV) according to the "minimum liquid resistance principle" and "decomposed hydraulic circuit design", the pilot control circuit is adopted The innovative four-way circuit combination and functional valve block controlling the main stage of four seat valves are beginning to replace the electro-hydraulic directional valve (spool valve main stage) combination based on ISO4401 medium and large size (NG16-32) plate connection on a large scale circuits and valve blocks. [0003] However, most of the existing ISO CV product samples at home and abroad, es...

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Problems solved by technology

[0009] In the existing circuit system mainly composed of two-way cartridge valves conforming to the ISO7368 standard, that is, cover plate cartridge valves, the opening and closing characteristics of the oil inlet resistance are adjusted by adding control elements in the pilot network, such as damping, small and micro Throttling elements, etc., or by adding mechanical adjustment devices, such as setting an adjustment rod on the top, etc., but this will directly cause a substantial increase in product volume and processing costs, and such measures cannot be adjusted in actual working conditions. The spring force on the spool, and the spring force plays a vital role in the opening and closing characteristics, so the adjustment effect is relatively limited

[0010] In addition, the existing ISO7789-compliant threaded cartridge valves on the market have the main characteristics of complex structure and diversified functions. They are mainly used in pilot control systems and control circuits with auxiliary functions, and are rarely used in main circuit control. Even Logic elements of certain specifications are also limited by relatively small flow capacity and single structure, especially as a replacement for the oil inlet resistance of the original circuit composed of cover-type cartridge valves, which cannot be used for opening and closing characteristics. Individual occasions with adjustment needs

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