Closures are used for various large-scale water supply and drainage, as well as hydraulic and water conservancy projects. They are designed to control the lifting and lowering of large and medium-sized cast iron and steel gates to achieve the purpose of opening and closing.
The Screw Actuator is one of Zhaohua Hydromechanical's leading products, primarily used in hydroelectric power and water conservancy projects, municipal construction, water supply and drainage, aquaculture, and agricultural water conservancy projects. The product range includes screw-type actuators and winch-type actuators.
Available screw-type gate valves include: LQ hand-cranked screw gate valve (2T-20T), LQ hand-electric screw gate valve (3T-50T), LQ side-tilt screw gate valve (0.5T-3T), LQ hand-push screw gate valve (0.5T-2T), LQ handwheel screw gate valve (0.5T-2T), and LQ dual-hoist hand-electric dual-use gate valve (2-50T).
Screw Actuated Gate Valves: Utilizing spiral screw transmission, these valves can control the vertical movement (such as gates, weir gates, valves) or rotational movement (like butterfly valves, rotating weir gates) of the actuated equipment, thereby achieving the opening and closing of valves or gates. The mechanism is compact and rational, featuring high actuation force and a complete series. They are widely used in waterworks, sewage treatment plants, various water supply and drainage projects, and in the lifting and adjustment of gates, weirs, sludge valves, and other equipment in hydraulic and hydroelectric projects.
Manual (handwheel, hand-crank) and electric (hand/electric dual) control types are available. Utilizing helical screw transmission, it can control the up and down movement (such as sluice gates, weir gates, and gate valves) or rotational movement (like butterfly valves, rotating weir gates) of the activated machinery, thereby achieving the opening and closing of valves or gates. The mechanism is compact and rational, with high lifting force, a complete range, and is widely used in waterworks, sewage treatment plants, various water supply and drainage projects, and hydraulic and hydroelectric projects for the lifting and adjustment of gates, weir gates, sludge valves, and other equipment.
Operation Procedure for Dual-Use Flashlight Switching Machine
1. Inspect the dual-purpose switchgear's power distribution equipment operation, close the main power switch, and immediately activate the backup power source upon power outage, performing the power switch as required.
2. Check for phase loss in the three-phase power supply and ensure the voltage meets the requirements.
3. Check the power switch inside the control box, verify the power indicator, and sequentially open and close the gates in the direction indicated.
4. In cases of issues such as dual-purpose flashlight door card jamming, heavy opening and closing, overloading of the opening and closing machine, stalling, or abnormal noises from the gate or opening and closing machine, it is imperative to stop and inspect immediately to eliminate any faults.
5. In the event of a brake slip when stopping at a certain height, emergency measures should be taken to force the brake.
6. During the operation of the dual-use flashlight opening and closing machine, add oil by tightening the oil level indicator and refueling once every 20 meters of lift height exceeded.
7. In the event of an unexpected stop, first disconnect the power, identify the cause, rectify the fault, and then resume operation.
8. Do not adjust the braking equipment or tighten the fixed screws when the gate is in the open position.
