The YJGQ hydraulic rail clamp is a critical safety device designed to secure rail-mounted industrial equipment against wind-induced movement and emergency situations. With clamping forces ranging from 160 KN to 600 KN, the YJGQ series provides reliable storm protection for bridge cranes, gantry cranes, stacker-reclaimers, and other rail-mounted machinery in ports, steel mills, power plants, and heavy industrial facilities.
Featuring spring-applied, hydraulic-release operation, the YJGQ rail clamp automatically engages when hydraulic pressure is lost—ensuring your equipment remains secure during power failures, hydraulic system breaches, or emergency situations when you need security most.
Key Specifications at a Glance
| Parameter | Specification |
|---|---|
| Clamping Force Range | 160 – 600 KN |
| Models | YJGQ-16, YJGQ-20, YJGQ-25, YJGQ-31, YJGQ-40, YJGQ-60 |
| Working Pressure | 10-16 MPa (varies by model) |
| Operating Temperature | 0°C to +40°C |
| Power Supply | 3-phase AC380V, 50Hz |
| Control Voltage | AC220V, 50Hz |
| Rail Compatibility | Qu100, Qu80, Qu70, P50, Qu120 |
Why Choose YJGQ Hydraulic Rail Clamps?
1. Complete Storm Protection System
The YJGQ rail clamp is a cornerstone of comprehensive crane storm protection:
- Spring-applied fail-safe design engages automatically on pressure loss
- Multiple force ratings (160-600 KN) match different crane sizes
- Directly grips rail web for positive, slip-free anchoring
2. Flexible Force Options
The YJGQ series offers six force ratings to match your equipment:
- YJGQ-16: 160 KN – Light cranes, stacker-reclaimers
- YJGQ-20: 200 KN – Medium bridge cranes
- YJGQ-25: 250 KN – Heavy-duty gantry cranes
- YJGQ-31: 315 KN – Large gantry equipment
- YJGQ-40: 400 KN – Port gantry cranes
- YJGQ-60: 600 KN – Massive shipyard goliaths
3. Broad Rail Compatibility
YJGQ rail clamps accommodate standard industrial rail profiles:
- Qu100 (100 lb/yd rail)
- Qu80 (80 lb/yd rail)
- Qu70 (70 lb/yd rail)
- P50 (50 kg/m rail)
- Qu120 (120 lb/yd rail)
4. Anti-Slip Calculation
The anti-slip force is calculated using:
Fanti-slip = 2 × Clamping Force × μ
Where μ (friction coefficient) = 0.25 typically
Example: YJGQ-40 with 400 KN clamping force provides 200 KN anti-slip force
YJGQ Model Specifications
| Model | Clamping Force (KN) | A (mm) | B (mm) | C (mm) | E (mm) | H (mm) | L (mm) | Rail Compatibility |
|---|---|---|---|---|---|---|---|---|
| YJGQ-16 | 160 | 820 | 870 | 630 | 790 | >310 | 650 | Qu100, Qu80, Qu70, P50 |
| YJGQ-20 | 200 | 820 | 870 | 630 | 790 | >310 | 650 | Qu80, Qu100, Qu120 |
| YJGQ-25 | 250 | 930 | 890 | 720 | 835 | >380 | 650 | Qu80, Qu100, Qu120 |
| YJGQ-31 | 315 | 930 | 890 | 720 | 835 | >380 | 650 | Qu80, Qu100, Qu120 |
| YJGQ-40 | 400 | 1100 | 1100 | 830 | 1050 | >410 | 705 | Qu80, Qu100, Qu120 |
| YJGQ-60 | 600 | 1250 | 1250 | 830 | 1100 | >430 | 705 | Qu120 |
Note: All models require matching YZ(J) hydraulic station. See hydraulic station matching table below.
Hydraulic Station Matching
| Rail Clamp Model | YJGQ-16 | YJGQ-20 | YJGQ-25 | YJGQ-31 | YJGQ-40 | YJGQ-60 |
|---|---|---|---|---|---|---|
| Rail Models | Qu100, Qu80, Qu70, P50 | Qu80, Qu100, Qu120 | Qu120 | |||
| Hydraulic Station | YZ(J)-13-4 | YZ(J)-10-6 | YZ(J)-13-6 | YZ(J)-14-9 | YZ(J)-15-10 | |
How YJGQ Rail Clamps Work
Storm Protection Mode (Clamped)
In the clamped position:
- Spring force pushes clamping jaws against the rail web
- Mechanical grip prevents any horizontal crane movement
- Wind forces cannot shift the secured crane
- System remains clamped even during complete power loss
Operational Mode (Released)
When the crane needs to move:
- Hydraulic pressure (10-16 MPa) is applied to the clamp cylinder
- Hydraulic force overcomes spring force
- Clamping jaws release from the rail
- Crane can travel freely
Primary Applications
Bridge & Gantry Cranes
The primary application for YJGQ rail clamps is bridge cranes and gantry cranes in industrial facilities, warehouses, and manufacturing plants. The clamp provides critical storm protection for these expensive pieces of equipment.
Port Terminal Equipment
In port terminals, YJGQ clamps secure rubber-tyred gantry (RTG) cranes, mobile harbor cranes, and shipyard equipment against typhoons and high winds.
Stacker-Reclaimers
Stacker-reclaimer machines in coal yards, ore stockpiles, and bulk terminals use YJGQ rail clamps to prevent wind-induced movement that could damage conveyor systems or the machines themselves.
Steel Mills & Heavy Industry
In steel mills and heavy industrial facilities, YJGQ clamps secure equipment during maintenance operations and provide emergency stopping capability.
YJGQ vs YDGZ-40: Choosing the Right Rail Clamp
| Feature | YJGQ Series | YDGZ-40 |
|---|---|---|
| Clamping Force | 160 – 600 KN (variable) | 400 KN (fixed) |
| Models | 6 models | Single model |
| Hydraulic Pressure | 10-16 MPa | 8 MPa |
| Weight | 180-500 kg | 1110 kg |
| Rail Compatibility | Multiple profiles | CR73, CR89, CR105, UIC60 |
| Best For | Versatile, multiple crane sizes | Large STS cranes, heavy gantries |
Choose YJGQ when: You need flexibility with multiple force ratings to match different crane sizes, or when lighter weight and lower hydraulic pressure requirements simplify your system.
Choose YDGZ-40 when: You need maximum clamping force (400 KN fixed) for the largest port cranes and ship-to-shore equipment, or when the heavier, more robust construction is needed for extreme conditions.
Frequently Asked Questions
How do I select the right YJGQ model for my crane?
What happens if hydraulic pressure is lost during a storm?
What hydraulic station do I need for YJGQ clamps?
Can YJGQ clamps be retrofitted to older cranes?
What maintenance does YJGQ require?
Related Products & Storm Protection System
Complete your crane storm protection system with these complementary products:
- YDGZ-40 Heavy Duty Hydraulic Rail Clamp – Maximum force option (400 KN) for largest cranes
- YLBZ Series Hydraulic Wheel Side Brake – Wheel tread braking for drive wheel arrestment
- YFX Electric Hydraulic Windproof Iron Wedge Brake – Wedge-type wheel brake for additional arrestment
- YWZ4 Series Electric Hydraulic Drum Brakes – Hoist and travel brakes for crane applications
Request a Quote for YJGQ Hydraulic Rail Clamps
Get the storm protection your rail-mounted equipment demands. Our engineering team can help you select the optimal YJGQ model based on your crane specifications, rail profile, and local wind load requirements.
Contact us today to discuss your storm protection requirements, request dimensional drawings, or receive a detailed quotation for YJGQ hydraulic rail clamps and complete brake systems.
