Lift converging multiway valve

Abstract

A lift converging multiway valve belongs to the technical field of forklift multiway valves, and comprises an oil inlet and return valve plate and an oil inlet valve plate, wherein a lift converging valve plate, an inclined valve plate and an accessory valve plate are coordinately arranged between the oil inlet and return valve plate and the oil inlet valve plate, the oil inlet and return valve plate and the lift converging valve plate are arranged into an integral structure, a speed limit valve is arranged on the oil inlet and return valve plate, a lift valve rod is coordinately arranged in the lift converging valve plate, an oil channel and a group of oil ports are coordinately arranged in the multiway valve, an oil inlet check valve is coordinately arranged on the oil channel, and a safety valve is coordinately arranged at one side of the oil inlet and return valve plate. The double-pump working state is only applied when a forklift doorframe is lifted, for other motions of the doorframe, only one pump is required to work, the other pump unloads at low pressure, the normal lift motion of a forklift is ensured, the energy consumption loss of an engine or a motor is also decreased, the use of an oil pipe of a system is reduced, the lift converging multiway valve has a simple structure, the utilization rate of a valve body is improved, the manufacture costs of the valve and a pipeline can be saved, the pressure loss of the valve body can also be reduced, so an energy-saving effect is realized.

Description

technical field [0001] The invention belongs to the technical field of forklift multi-way valves, and in particular relates to a confluent lifting multi-way valve with advanced structure, large flow rate, relatively low cost and good energy-saving effect. Background technique [0002] At present, the vast majority of forklift multi-way valves below 6-25T in China are double-pump confluence quantitative open-type multi-way valves. Since the flow required for the forklift mast to rise is the maximum value, the system design selects double-pump confluence according to the maximum flow. The engine or electric motor power used is also sized for the maximum value. When the gantry tilts or moves sideways, the required flow rate is only 30% to 45% of the maximum flow rate, but the multi-way valve is also in the state of confluence, and the flow rate to the tilting cylinder and the sideshifting cylinder is much greater than the required flow rate (national standards stipulate gantry...

AI Technical Summary

Problems solved by technology

When the gantry tilts or moves sideways, the required flow rate is only 30% to 45% of the maximum flow rate, but the multi-way valve is also in the state of confluence, and the flow rate to the tilting cylinder and the sideshifting cylinder is much greater than the required flow rate (national standards stipulate gantry tilting time), so it is necessary to throttle on the multi-way valve to overflow part of the flow, resulting in a large loss of energy consumption

Images