YJGQ - 25 Hydraulic Rail Clamp is a type of windproof and positioning equipment in the YJGQ series hydraulic rail clamps. It is widely used in outdoor rail - mounted machinery. The following is a detailed introduction based on its parameters, characteristics, working principles and other aspects:
Core Parameters
| Parameter Category | Specific Content |
|---|---|
| Performance Parameters | Its rated clamping force is 250kN. According to the calculation formula of anti - slip force (anti - slip force = 2×clamping force×friction coefficient, and the friction coefficient μ is generally 0.25), its anti - slip force can reach 125kN. It is specially matched with QU120 rails to meet the windproof and positioning needs of medium and large - scale rail machinery. |
| Structural Parameters | Its external dimension parameters are fixed. The dimensions of A, B, and C are 930mm, 890mm, and 720mm respectively. The connecting hole specification is 8 - Φ30, the dimension of E is 835mm, F is 97mm, G and H are both 93mm, J is more than 380mm, and L is 650mm. |
| Electrical and Environmental Parameters | The ambient temperature suitable for work is -20℃ ~ +50℃. The driving power of the matching hydraulic station is three - phase AC 380V 50Hz, the control power supply is AC 220V 50Hz, and the power supply of the limit switch is AC 125 - 250V. It adopts an intermittent working system, which is suitable for short - time action and low - frequency operation scenarios. |
Key Characteristics
Reliable floating structure: The clamp body adopts a floating design, with a horizontal floating distance of ±20mm and a vertical floating distance of ±10mm - ±20mm. This structure can adapt to the slight deviation of the rail during the operation of the machinery and ensure that the clamp can always firmly fit the rail.
Comprehensive protection design: It has an anti - corrosion design, which can resist the erosion of harsh outdoor environments and prolong the service life. It is also equipped with a release limit switch, which can form interlocking protection with the traveling mechanism of the crane. If the clamp is not fully released, the crane cannot start traveling, avoiding mechanical failures.
Emergency manual operation: The matching hydraulic station is equipped with a manual pump. When the power is cut off unexpectedly and the hydraulic system fails to work, the manual pump can be used to manually release the clamp, improving the emergency handling capacity of the equipment.
Working PrincipleThis rail clamp adopts the normally closed design of spring clamping and hydraulic release:
Clamping state: When the outdoor rail crane and other host equipment stop running, the hydraulic system loses pressure. The spring in the clamp releases elastic force, driving the clamp mechanism to act, so that the clamp firmly clamps the QU120 rail, forming a reliable windproof and anti - displacement protection for the equipment.
Release state: When the host needs to start traveling, the hydraulic station is first activated. The hydraulic oil enters the cylinder, pushing the piston to compress the spring, and then the clamp is driven to open. After the clamp is fully opened, the limit switch is triggered. At this time, the traveling circuit of the host is connected, and the host can start traveling smoothly. During the traveling process, the hydraulic system maintains a stable pressure to keep the clamp in the open state.
Matching and Application Scenarios
Matching accessories: It needs to be used with the YZ(J)-13-4 hydraulic station. The end flange connection method is adopted between components, which is firm and stable and convenient for later disassembly and maintenance.
Main application scenarios: It is mainly used for windproof braking of outdoor rail cranes, self - propelled crane trolleys, etc. It can also realize the positioning braking of belt conveyor unloading trucks, preventing the equipment from sliding or swinging due to strong winds and other external forces in both working and non - working states.
