Multichannel reversing valve preventing fault operation

Abstract

The invention discloses a multichannel reversing valve preventing fault operation. The multichannel reversing valve comprises a valve body and a valve core; the valve body is a barrel-shaped body, and the valve core is a cylindrical body; when the valve core is inserted into the valve body, the valve body is coaxial with the valve core; an oil inlet annular groove is formed in the inner circumferential surface of the valve body, and the oil inlet annular groove is communicated with an oil inlet; a long hole is formed in the valve core, and the length direction of the long hole is consistent with the axial direction of the valve core; the valve core can move along the axial direction of the valve body, and the valve core is sequentially switched among an oil inlet position, a middle maintaining position and an oil return position when moving in the axial direction from the left to the right; when the valve core is moved to the oil return position, the oil return valve is opened by the high-pressure oil in the oil inlet so as to realize the oil return. The multichannel reversing valve preventing the fault operation has advantages of no oil return when the valve core is operated by mistake, the safety and reliability of the multichannel valve are improved, and the like.

Description

technical field [0001] The invention relates to a multi-way reversing valve which prevents misoperation. Background technique [0002] The reversing valve is a valve that changes the on-off relationship of the oil passage connected to the valve body by means of the relative movement between the spool and the valve body. The multi-way reversing valve is a combined valve with more than two reversing valves as the main body. According to different work requirements, it can also be combined with auxiliary valves such as safety relief valve, check valve and oil filling valve. Compared with other types of valves, the multi-way reversing valve has the advantages of compact structure, small pressure loss, small sliding resistance, multiple functions, long life, and simple manufacture. [0003] Such as Figure 5-7 It is a multi-way valve in the prior art, which includes a valve body, a valve core and a back cover; the multi-way valve has three working states, namely, an oil inlet s...

AI Technical Summary

Problems solved by technology

If the multi-way valve of the prior art is adopted, even if the engine is stopped, once someone presses the multi-way valve by mistake, the working oil port A02 will quickly return oil, and at this time the lifting platform of the forklift, agricultural machinery or lift truck will be lowered quickly , the goods or staff will be damaged or injured during the rapid landing process, and there are certain potential safety hazards

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