Dual-drive hydraulic power unit used by hydraulic elevator

Abstract

The invention discloses a dual-drive hydraulic power unit used by a hydraulic elevator. The dual drive hydraulic power unit comprises a hydraulic power unit tank which is connected with the oil-way of the lifting cylinder of an elevator. The cover plate of the power unit tank is provided with an oil pump which is connected with the hydraulic manifold block of the lifting cylinder of the elevator through an output line, the oil-way in the hydraulic manifold block is sequentially jointed with a first manual drive oil-way and a first hydraulic circuit through a one-way valve, the manual drive oil-way of the hydraulic manifold block is jointed with a manual pump, and hydraulic circuits of the hydraulic manifold block are respectively provided with a control oil pump, a solenoid valve, a manual valve and a throttle valve. The solenoid valve is used for regulating the pressure of the manual pump oil-way. The dual drive hydraulic power unit adds a manual drive oil-way for the hydraulic power unit which provides power to the hydraulic elevator, and enables the hydraulic power unit of the hydraulic elevator to have dual-drive capabilities. By the dual-drive oil-ways of the hydraulic pump, the lifting cylinder of the elevator can be driven alone to lift a loading platform, and accidents due to the stopping of the hydraulic power unit caused by sudden power failure or power outage are avoided.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to a mechanism for providing power for a hydraulic lift, in particular to a double-drive hydraulic pump station for a hydraulic lift. Background technique [0002] In the hydraulic lift in the prior art, the hydraulic power pump station usually provides pressure oil for the lifting mechanism, which sends the pressure oil to the lifting cylinders of the hydraulic lift at all levels through the hydraulic control mechanism and hydraulic pipelines, so that the piston rod of the lifting cylinder moves telescopically. , to push the loading platform of the elevator up and down to complete the loading and unloading of the goods. Since most of the existing hydraulic pump stations that provide power for hydraulic lifts use electric motors (motors) as the source of oil pump drive, the mechanism of the hydraulic pump station installs each valve and its supporting components outside t...

AI Technical Summary

Problems solved by technology

Since most of the existing hydraulic pump stations that provide power for hydraulic lifts use electric motors (motors) as the source of oil pump drive, the mechanism of the hydraulic pump station installs each valve and its supporting components outside the integrated oil circuit board, or Layer upon layer, the hydraulic pump station is bulky, complex in structure, and difficult to maintain

Especially when the load of the elevator rises upwards, a sudden power failure or power failure will often cause the hydraulic pump station to stop running, and the loading and unloading work cannot be continued, so that the lifting platform stopped in mid-air is in a state of out of control, which is extremely dangerous. It may lead to the occurrence of safety accidents, thus bringing great unsafe factors to the hydraulic lift, resulting in the lack of competitiveness of the hydraulic lift in the market, and also adversely affecting the development direction of the hydraulic lift in the loading and unloading industry

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