Screw Hoist

Screw Hoist

Screw hoist is a medium & small lifting device that realizes gate lifting and lowering via meshing transmission between screw rod and nut. It is widely adopted for the control of sluice gates and weir gates in water conservancy and municipal engineering projects.


Based on driving modes, it can be divided into manual type, electric type and combined manual-electric type.

Specifications


Reliable Core Transmission: Adopts rigid transmission structure with meshed screw and nut. Power transmission is direct with no slipping risk, ensuring stable and controllable opening & closing operation.

Excellent Positioning Accuracy: The screw moves along a fixed linear track. Combined with travel limit devices, it enables precise control of gate lifting positions with tiny error margin.

Compact & Simplified Structure :Mainly composed of drive unit, reduction mechanism, screw rod, nut and frame. Fewer components lead to small overall size and low occupation of installation space.


Fast & Convenient Installation: Complicated foundation construction is not required; the frame features simple fixing methods. Medium & small units can be installed and commissioned manually to shorten construction periods.

Flexible Driving Options :Three drive modes available: manual, electric and manual-electric dual-purpose, suitable for sites with or without power supply.

Reliable Emergency Operation:All electric models are equipped with hand crank mechanisms. Manual operation is available during sudden power outages or motor failures to meet emergency gate control requirements.



Low Maintenance Cost: Screw and nut are the main wearing parts; only regular lubrication is needed with minimal maintenance workload.

Complete Safety Protection: Standard upper and lower travel limit switches prevent over-travel operation. Selected models are fitted with overload protection to avoid equipment damage caused by excessive load.



Strong Environmental Adaptability :Electrical components reach IP54 or higher protection grade, adapting to humid and dusty conventional working conditions in water conservancy projects.

Easy Operation: Manual models deliver low cranking resistance; electric models feature simple control panels. No professional skills required for regular operators.

Wide Gate Compatibility: Perfectly matched with various medium and small gates including flat gates and cast iron steel gates, with strong universal applicability.


Item

Parameter Description

Rated Lifting Capacity

Multiple models available from 0.5t to 60t

Nominal Screw Diameter

φ30mm~φ160mm

Standard Lifting Stroke

0.5m~8m, extended stroke customizable

Lifting Speed

0.8~1.2m/min

Rated Motor Power

0.75kW~15kW

Motor Voltage

380V three-phase industrial power supply

Protection Class

IP54, waterproof and dustproof for outdoor use

Transmission Type

Worm and worm wheel reduction drive

Self-locking Performance

Holds the gate at any position without sliding after shutdown

Limit Device

Dual upper and lower travel limit switches

Ambient Operating Temperature

-20℃~+60℃


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