Reduplicative positioning hydraulic machine control device

Abstract

The utility model relates to a control device for repeatedly in place hydraulic equipment, which is composed of a two-position two-way oil return rotary valve, a double control one-way valve and a hydraulic control one-way valve. The lower chamber of the oil cylinder of the device is provided with a low-pressure accumulator, and the upper chamber of the oil cylinder is provided with a high-pressure accumulator. The operating handle is placed in a handle pipe seat, which is provided with a universal coupling capable of controlling the oil return rotary valve, and a power arm for driving the oil pump is fixed on the handle pipe seat. Because the present invention has high and low-pressure accumulators, when the high-pressure accumulator releases energy to the upper chamber of the oil cylinder and the pressure drop piston is in place, the oil in the lower chamber enters the low-pressure accumulator to store energy and is used to lift the piston again. It realizes full hydraulic automatic position, and there is no oil leakage problem at the breathing port of the fuel tank. The control device composed of oil return rotary valve and two one-way valves has reliable sealing on time. The pump and valve are jointly controlled, and the operating handle can make the oil pump arbitrarily supply oil to the upper and lower chambers of the oil cylinder, realizing repeated positioning without load.

Description

technical field [0001] The invention relates to a hydraulic implement control device for jacking loads. Background technique [0002] The disclosed 991152379 "hydraulic jacking equipment automatic device" and 001133020 "automatic hydraulic jack" have the following disadvantages: the stored energy is difficult to achieve no-load repeated positioning; The one-way valve realizes the control, and its sealing is difficult; the automatic positioning of the oil cylinder, on the one hand, relies on the spring force to lift the piston in place, and quickly absorbs oil from the oil tank, and on the other hand, it relies on the accumulator to release energy, and the pressure drop of the piston reaches (recovery) Position, quickly drain oil to the fuel tank, a large amount of oil quickly enters and exits from the fuel tank, and its breathing port is required to be particularly unblocked. When the machine is turned upside down, oil cannot escape from the breathing port, resulting in comp...

AI Technical Summary

Problems solved by technology

[0002] The disclosed 991152379 "hydraulic jacking equipment automatic device" and 001133020 "automatic hydraulic jack" have the following disadvantages: the stored energy is difficult to achieve no-load repeated positioning; The one-way valve realizes the control, and its sealing is difficult; the automatic positioning of the oil cylinder, on the one hand, relies on the spring force to lift the piston in place, and quickly absorbs oil from the oil tank, and on the other hand, it relies on the accumulator to release energy, and the pressure drop of the piston reaches (recovery) position, quickly drain oil to the fuel tank, a large amount of oil enters and exits quickly from the fuel tank, and its breathing port is required to be particularly unblocked. When the machine is turned upside down, oil cannot escape from the breathing port, resulting in complicated disposal

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