Mechanical hydraulic control reversing valve
A hydraulically controlled reversing valve, mechanical technology, applied in the direction of mechanical equipment, multi-way valves, valve devices, etc., can solve the problems of frequent switching of the main valve, and the main valve core stops at a certain position in the middle, so as to ensure stable operation Performance and reliability, fast response, small size
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Embodiment 1
[0061] The invention provides a mechanical hydraulic control reversing valve, such as figure 1 As shown, it includes a first adjustment mechanism, a second adjustment mechanism, a pilot valve sleeve 9, an oil chamber switching mechanism, a main valve core 19 and a main valve sleeve 21. One end of the pilot valve sleeve 9 is equipped with a first adjustment mechanism, so One end of the main valve sleeve 21 is installed with a second adjustment mechanism, the other end of the pilot valve sleeve 9 is connected to the other end of the main valve sleeve 21 and an installation chamber is formed inside, the oil chamber switching mechanism, the main valve core 19 are sequentially arranged in the installation chamber along the direction from the first adjustment mechanism to the second adjustment mechanism, a first accommodation space 30 is formed between the oil chamber switching mechanism and the first adjustment mechanism, and the oil chamber switching mechanism The first pilot cavi...
Embodiment 2
[0077] This embodiment is a preferred example of Embodiment 1.
[0078] Such as Figure 4 , Figure 5As shown, the valve block in this embodiment has a main oil source port, an auxiliary oil source port, a load port and an oil return port. When the oil pressure of the two oil sources is normal, the pilot spool 11 is in the closed state, and the main spool 19 is always at the leftmost position under the action of the main valve spring 26 and the oil pressure of the main spool spring cavity. At this time, the load oil port is connected with the main oil source oil port, and the main oil source supplies oil in the working state. When the oil supply pressure of the main oil source is lower than the second preset oil pressure, the pilot spool 11 opens, and the oil pressure of the main valve spool 19 in the left chamber of the main valve, the spring force of the main valve and the oil pressure in the spring chamber of the main spool Move down to the rightmost position under actio...
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