The ZYTJX250 series hydraulic rail clamp is a normally - closed, spring - actuated, hydraulic - released rail - clamping device, designed for outdoor rail - mounted cranes and port machinery to provide reliable wind - proof and anti - slip braking during operation and parking, featuring a floating connection structure, double - guide - wheel anti - derailment design, and safety interlock protection. Below is a detailed breakdown of its core parameters, structural features, working principles, applications, common faults, and maintenance guidelines.
Core Technical Parameters
| Parameter | ZYTJX250 Standard Value |
|---|---|
| Rated anti - slip force | 250 kN |
| Applicable rail models | P38, P43, P50, QU70, QU80, QU100, QU120 |
| Working pressure | 16 MPa (hydraulic release) |
| Hydraulic station power | 0.75-1.5 kW (3 - phase AC380V 50Hz) |
| Control voltage | AC220V 50Hz or 3 - phase AC380V 50Hz |
| Clamping force source | Disc springs (fail - safe normally - closed) |
| Guide wheel protection | Double - guide - wheel anti - derailment |
| Limit switch | IP65, for interlock with traveling mechanism |
| Working environment | -20℃ to +50℃, salt - fog - resistant |
| Mounting method | Horizontal end - face flange |
| Weight | ~280-300 kg |
| Compliance standard | JB/T 10917-2008 |
Key Structural & Design Features
Fail - Safe Normally - Closed Design
Disc springs provide the main clamping force; the clamp is released by hydraulic pressure. In case of power/hydraulic failure, the disc springs instantly clamp the rail to prevent wind - induced movement.
The floating connection between the clamp base and the support accommodates rail deviation (±5 mm) during crane travel, ensuring stable clamping.
Anti - Derailment & Interlock Safety
Double guide wheels prevent the clamp from 脱离 the rail during clamping/release, improving operational stability.
An IP65 - rated limit switch confirms the release position and interlocks with the crane traveling mechanism, allowing the crane to move only when fully released.
Hydraulic Release & Manual Backup
Hydraulic cylinders drive the release, with low noise and stable action. The hydraulic station is equipped with a manual pump for emergency release during power failure, facilitating maintenance.
Corrosion - Resistant & Durable
The clamp body and fasteners are treated with anti - corrosion coating; the friction lining is salt - fog - and wear - resistant, suitable for coastal port and outdoor harsh environments.
Working Principle
It operates in the disc - spring clamping + hydraulic release + interlock protection mode:
Clamping State (Power - Off/Wind - Proof): When the crane stops or loses power/hydraulic pressure, disc springs push the clamp jaws to clamp the rail, generating a 250 kN anti - slip force to prevent wind - induced displacement.
Release State (Operation): When the crane is ready to move, the hydraulic station starts, and hydraulic oil pushes the piston to compress the disc springs, separating the jaws from the rail. The limit switch sends a release - in - place signal, and the traveling mechanism can start.
Emergency & Manual Release: In case of power/hydraulic failure, the disc springs clamp the rail automatically. The manual pump on the hydraulic station can be used to release the clamp for maintenance.
Typical Applications
It is mainly installed on the traveling mechanisms of outdoor rail - mounted cranes, such as gantry cranes, quayside container cranes, ship - to - shore cranes, and belt conveyor unloading carts, providing wind - proof braking during operation and auxiliary anti - slip protection during long - term parking. It is suitable for cranes with a rated load of 100-300 t and is often used in combination with wind - resistant cables and anchoring devices for double safety.
