Product Summary

The QPPY I Series hydraulic hoist is a gate-duty lifting system from Jiangsu Wujin Hydraulic Hoist Co., Ltd., a hydraulic equipment manufacturer founded in 1970. It is built for water conservancy, hydropower station, river regulation and flood control projects, where gates must be raised and lowered under high water pressure, high humidity and splash-water conditions.

The series is rated for a maximum lifting force of 2 × 5,000 kN and a maximum design stroke of 20 m. The body is carbon steel with anti-corrosion surface treatment, and each unit is supplied with matching hydraulic power station, control cabinet and stroke sensor so that lifting, control and position feedback are integrated as one system.

Key Features

• 2 × 5,000 kN maximum lifting force - handles heavy dam and sluice gates that must move against high water pressure.
• 20 m maximum design stroke - covers deep gate travel and wide water-level regulation ranges.
• Carbon steel body with anti-corrosion surface treatment - suited to outdoor, high-humidity and splash-water duty.
• Complete system integration - hydraulic power station, control cabinet and stroke sensor are matched as one hoisting package.
• Overload protection and stable lifting - supports flood control and power station safety operation.
• CPMS-JD absolute stroke sensor option - millimeter-level positioning with strong resistance to electromagnetic interference.

Technical Specifications

Models and Options

The QPPY I Series is the base configuration covered by this page: a double-cylinder arrangement rated at 2 × 5,000 kN with up to 20 m of design stroke. Within the series, the configuration is set per project:

• Lifting force and stroke are confirmed against the gate weight, opening height and water head of each intake or sluice.
• Operation can be specified as automatic or manual remote control, local on-site operation, or emergency manual operation.
• Position feedback can be delivered with the CPMS-JD absolute stroke sensor where millimeter-level indication is required.

Materials and Structure

The hoist is manufactured in carbon steel with an anti-corrosion surface treatment selected for permanently humid, splash-exposed gate chambers. Cylinder, power unit and control cabinet form one hydraulic circuit, with the stroke sensor mounted on the hoist to feed gate position back to the control system. Overload protection is built into the lifting circuit so that a blocked or jammed gate is not forced. For marine and offshore duty, the manufacturer also applies its independently developed ceramic piston rod technology, which is used in its marine hydraulic equipment.

Applications

QPPY I hydraulic hoists are used for lifting and lowering gates, water level regulation, flood prevention and dam safety control in:

• Hydropower station intake and spillway gates
• River sluice and barrage gates
• Navigation lock gates
• Coastal tide gates and flood control and drainage projects
• Marine engineering and river regulation structures

Customization

Each hoist is built to the project duty rather than from a fixed catalogue: lifting force within the 2 × 5,000 kN series rating, design stroke up to 20 m, choice of control mode, sensor integration, and anti-corrosion treatment level for the site environment. Complete system integration is available, covering hydraulic power station, control cabinet and stroke sensor, so the buyer receives one coordinated hoisting system. Manufacturing is covered by the manufacturer's ISO 9001 quality management system, ISO 14001 and ISO 45001 certificates.

Case Study

Hydropower dam gates - hydropower authority and large EPC contractor, 40 sets

Forty sets were delivered for dam gate opening and closing, flood control, water level regulation and power station safety operation. The heavy-load design, high anti-corrosion performance and overload protection keep the gates operating reliably under ultra-high water pressure.

FAQ

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