Extra-high pressure automatic hydraulic reversing valve
A hydraulic reversing valve and ultra-high pressure technology, applied in the field of hydraulic valves, can solve the problems of inconvenient operation, high use frequency and high failure rate of the valve, and achieve the effect of reducing noise, improving service life and small size
Inactive Publication Date: 2012-11-14
袁平
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Problems solved by technology
[0002] At present, there are mainly manual ultra-high pressure reversing valves in China, but the valve is inconvenient to operate, and the operator must operate the handle to manually reversing and switch the oil passage, which is inefficient.
Secondly, the electromagnetic reversing valve is equipped with an electric control box to realize the oil channel switching of the hydraulic system. However, the valve core and the valve body are easily stuck when heated and expanded under high-temperature and high-pressure conditions, and the electromagnet cannot push the valve core, resulting in The electromagnet is easily burned out if it is energized for a long time, and the failure rate is high
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[0029] like Figures 1 to 16 As shown in the figure, the ultra-high pressure automatic hydraulic reversing valve of the present invention includes a valve body 1, a pressure regulating mechanism and a pressure gauge 2. On the seat 3, the connecting seat 3 communicates with the oil passage 28; the front wall of the valve body 1 is provided with an oil outlet A4 and an oil outlet B5, and the bottom of the valve body 1 is provided with an oil inlet port P6 and two oil return ports R7. The pressure mechanism includes a pressure regulating tube nut 15, a locking nut 16, a pressure regulating tube 17, a disc spring 18 and a disc spring rod 19. The bottom of the disc spring rod 19 is against the upper end of the control piston 14, and the disc spring rod 19 is sleeved with a disc spring. 18. The disc spring 18 is placed in the pressure regulating tube 17. The upper end of the disc spring rod 19 and the disc spring 18 are in close contact with the pressure regulating bolt 20 respectiv...
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The invention relates to an extra-high pressure automatic hydraulic reversing valve comprising a valve body, a pressure regulating mechanism and a pressure gauge, wherein both sides of the pressure regulating mechanism are respectively provided with a system unloading valve; a buffering mechanism is fixed on two oil return holes R; an oil inlet P, an oil outlet A and an oil outlet B are respectively provided with a filtering mechanism; three transverse piston cavities and a longitudinal piston cavity are arranged in the valve body; the three transverse piston cavities are respectively provided with a piston A, a piston B and a piston C; gaps are respectively arranged among the ends of the pistons; a control piston is arranged in the longitudinal piston cavity, the upper end of the controlpiston is in tight contact with the pressure regulating mechanism, and a gap is retained between the lower end of the control piston and the longitudinal piston cavity; the pressure regulating mechanism, the three transverse piston cavities and the longitudinal piston cavity are communicated by an oil channel arranged in the valve body, and the oil channel respectively leads to the oil inlet P, the oil outlet A, the oil outlet B and the oil return holes R. The extra-high pressure automatic hydraulic reversing valve has small size, light weight, direct pressure, adjustability, smooth reversionand no pressure difference.
Description
technical field [0001] The invention relates to a hydraulic valve, in particular to an ultra-high pressure automatic hydraulic reversing valve which can automatically change the pressure level up to 70MPa. Background technique [0002] At present, there are mainly manual ultra-high pressure reversing valves in China, but this valve is inconvenient to operate, and must be manually reversed by the operator operating the handle to switch the oil passage, which is inefficient. Secondly, the electromagnetic reversing valve is equipped with an electrical control box to realize the switching of oil passages in the hydraulic system. However, when the valve is used frequently, under high temperature and high pressure, the valve core and valve body are easily stuck due to thermal expansion, and the electromagnet cannot push the valve core, resulting in When the electromagnet is energized and excited for a long time, it is easy to burn out, and the failure rate is high. SUMMARY OF TH...
Claims
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IPC IPC(8): F15B13/02
Inventor 袁平
Owner 袁平