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YJGQ-20 Series Hydraulic Rail Clamp Brake
Product Overview The YJGQ-20 is a compact, single-acting hydraulic rail clamp of the YJGQ family - the light-duty counterpart of ZYTJX-250 . Same working principle (disc-spring apply, hydraulic release, NC fail-safe, jaw-grips-rail-head), scaled down for light-to-medium-duty rail-mounted...
Description
Product Overview
The YJGQ-20 is a compact, single-acting hydraulic rail clamp of the YJGQ family - the light-duty counterpart of ZYTJX-250. Same working principle (disc-spring apply, hydraulic release, NC fail-safe, jaw-grips-rail-head), scaled down for light-to-medium-duty rail-mounted equipment:
Light gantry cranes & portal frames - small legs, limited mounting space
Rail-mounted gantry (RMG) stackers & transfer cars - yard automation
Tunnel boring / underground haulage & gallery tracks - no electric actuator allowed
Shipyard / dock light gantries & maintenance runways
Slope maintenance cars & inspection trolleys - grade anti-creep
Pipeline / utility trench / tube-gallery track equipment
Installation and dimensions
Technical Specifications
| Parameter | Value |
|---|---|
| Model | YJGQ-20 (20 = 20kN class nominal clamping force) |
| Device Type | Hydraulic rail clamp (parking / anti-slip anchor) - NOT a service brake |
| Clamping Force | 20 kN per unit (typical, disc-spring preload; confirm per rail head & friction) |
| Actuation | Disc-spring apply (NC) / Hydraulic pressure release |
| Fail-Safe | Power-off / pressure-loss / hose-burst → jaws lock |
| Release Pressure | ~10–16 MPa (configurable with spring pack) |
| Hydraulic Supply | External power pack (single line) or manual hand pump for emergency release |
| Engage Time | ≤0.5 s (spring-driven, pressure-off) |
| Release Time | ~1–2 s (hydraulic) |
| Jaw / Rail Fit | Fits standard rail head (e.g. QU70 / QU80 / 50kg rail; specify rail type) |
| Holding Duration | Hours to days, zero energy (spring-held, no creep) |
| Options | Limit switches (clamped/released), Ex d coil on solenoid valve, corrosion paint, low-temp seals, manual-release hand pump |
| Ambient Temp. | -20°C ~ +40°C (std), -40°C low-temp kit available |
| Standards Ref. | GB/T crane design code (rail clamp / anti-slip); in-house type test |
| Mounting | Bolt-on to bogie / leg / carriage; left & right handed pairs |
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