Hydraulic control directional control valve
A technology of hydraulically controlled reversing valve and pilot reversing valve, which is applied in mining equipment, earthwork drilling, mine roof support, etc. Less source, compact and reasonable structure
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[0017] Figure 1 to Figure 4 A specific embodiment of the invention is shown in which figure 1 It is a structural schematic diagram of the present invention; figure 2 yes figure 1 A-direction view; image 3 yes figure 1 B direction view; Figure 4 yes figure 1 C direction view.
[0018] This embodiment is a hydraulic reversing valve used in a downhole hydraulic support, see Figure 1 to Figure 4 As shown, it includes a valve body 1; two large-flow main control valves 2 and five medium-flow pilot control valves 3 with operating mechanisms 31 are arranged in the valve body; two large-flow main control valves are adjacently arranged side by side, and five The medium flow pilot directional control valves are arranged adjacently and side by side.
[0019] The valve body includes seven sockets 11 provided with internal thread areas; the main control valves with large flows and the pilot reversing valves with medium flow are equipped with cartridge-type spool assemblies 4 wi...
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