Water Conservancy - Wujin Hydraulic

Three Gorges

Project

The first domestically developed large-scale hydraulic complete equipment made its debut in a national strategic water conservancy project.

01 — PROJECT BACKGROUND

China's Greatest Water Conservancy Project

In 1999, the Three Gorges Project—the world's largest hydropower facility and a national strategic key project of China—selected our company as one of its critical equipment suppliers.

As a pioneer in China's hydraulic hoist industry, we were entrusted with supplying hydraulic hoists for the dam's flood discharge system, intake gates, and sediment discharge outlets.

The Three Gorges Dam, spanning the Yangtze River in Hubei Province, was designed to harness the power of one of the world's greatest rivers for flood control, clean energy generation, and navigation improvement.

02 — PROJECT SCALE

Engineering on an Unprecedented Scale

Our scope of work covered three critical systems of the dam—a

testament to our manufacturing capability and engineering expertise.

23

tunnels

Flood Discharge Tunnels

14

openings

Intake Openings

1999

year

Project Commenced

System	Quantity	Cylinder Bore	Rod Diameter	Stroke	Equipment
Flood Discharge Tunnels	23	650 mm	380 mm	11.29 m	QHSY Hydraulic Hoists
Intake Openings	14	710 mm	330 mm	15 m	QPKY Hydraulic Hoists
Sediment Discharge Outlets	3	630 mm	280 mm	6 m	QPPY II Hydraulic Hoists

System	Quantity	Flow	Pressure
System Integration	40	500 L/min	25 MPa

03 — OUR SOLUTION

Indigenous Innovation

Meets National-Grade

Demands

For the Three Gorges Project, we engineered and delivered two specialized

hydraulic hoist systems, each purpose-built for its specific operating conditions.

Rapid Intake Gates
QPKY Hydraulic Hoist

Designed for fast, reliable gate closure under extreme hydraulic pressure at both the left and right bank powerhouses.

Cylinder Bore 710 mm

Rod Diameter 330 mm

Stroke 15 m

Opening Force 4000 kN

Holding Force 8000 kN

Flood Discharge
QHSY Hydraulic Hoist
Built to handle the rigorous operating conditions of high-flow water release through 23 flood discharge tunnels.

Cylinder Bore 650 mm

Rod Diameter 380 mm

Stroke 11.29 m

Opening Force 4000 kN

Closing Force 1000 kN

VIDEO

See It in Action

04 — ACCEPTANCE & COMPLIANCE

Meeting the Highest Standards

The project was officially completed in June 2014 and successfully passed the final acceptance inspection.

Through independent third-party testing and verification, all products were confirmed to fully comply with national standards. The system has demonstrated stable operation and high operational efficiency, ensuring long-term compliance with all applicable regulatory requirements.

June 2014 – Three Gorges Dam Project Acceptance

Final acceptance inspection passed in June 2014

Third-party testing verification completed

Full compliance with national standards confirmed

Stable operation and high operational efficiency validated

Long-term regulatory compliance ensured

05 — PROJECT SIGNIFICANCE

A Milestone for China's

Heavy Engineering Sector

The successful delivery marked the first large-scale application of domestically manufactured hydraulic hoist equipment in a national strategic project.

This achievement demonstrated that Chinese-made heavy engineering equipment

could meet the most demanding specifications—paving the way for domestic

suppliers to compete for projects of national and global significance.