Cartridge rotary shock valve

Abstract

The invention provides a plug-in mounting type rotary cushion valve which comprises a valve body, a main valve core, a valve seat, a threaded sleeve, a first elastic piece and a pilot valve core; an oil port A and an oil port B are formed in the valve body; the main valve core is arranged in the valve body; a first circulation channel communicating with the oil port A and a second circulation channel communicating with the oil port B are formed in the main valve core; the valve seat is connected in the main valve core; one end of the threaded sleeve is fixedly connected with one end, far fromthe oil port A, of the valve body; an oil port T is formed in one side, far from the oil port A, of a threaded sleeve port of the threaded sleeve; the first elastic piece is arranged between the threaded sleeve and the valve seat; one end of the pilot valve core is in compression connection with the threaded sleeve port to separate the oil port T; the other end of the pilot valve core penetrates through the threaded sleeve and the first elastic piece and enters into the valve seat; and a gap circulation channel is formed between the pilot valve core and the valve seat. The plug-in mounting type rotary cushion valve is simpler and more compact in structure, more convenient to machine and lower in cost.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a plug-in rotary buffer valve, which is mainly used in small cranes, hydraulic cranes, rotary mechanisms and the like. Background technique [0002] In order to improve the work efficiency and the mobility of the whole machine in construction machinery, there is generally a slewing mechanism. For truck cranes, the slewing mechanism is even more indispensable. However, the truck crane has a large load inertia during slewing, frequent starting and braking, and harsh working conditions. Therefore, its hydraulic system requires reliable operation, especially when the slewing is starting and braking, there should be no large pressure shock. [0003] The prior art generally prevents overload by setting a rotary buffer valve. At present, there are two main types of slewing buffer valves for small and medium tonnage hydraulic truck cranes on the market: one uses double relief valves con...

AI Technical Summary

Problems solved by technology

However, the above two rotary buffer valves are composed of multiple valve parts, which are relatively bulky and costly, and are not suitable for widespread use on small cranes.

Images