Through the action of a vane pump, the hydraulic oil builds up pressure before it enters the bottom of the hydraulic cylinder. The oil flows through an oil filter, an explosion-proof electromagnetic directional valve, a throttle valve, a hydraulic control one-way valve, and a balance valve, which causes the cylinder's piston to rise, ultimately lifting the heavy load. The overflow valve regulates the oil's rated pressure, as it travels back to the oil tank via the explosion-proof electromagnetic directional valve. Meanwhile, the pressure gauge provides real-time pressure readings, allowing for constant monitoring during lifting operations.
When the hydraulic cylinder's piston moves downwards, signifying that the weight has dropped, the hydraulic oil flows through the explosion-proof electromagnetic directional valve into the upper end of the hydraulic cylinder. The return oil that comes from the lower end of the hydraulic cylinder is directed back to the oil tank through the balance valve, hydraulic control one-way valve, throttle valve, and explosion-proof electromagnetic directional valve. To guarantee a secure and dependable braking system, a balance valve is also placed on the return oil circuit. Its role is to balance the circuit and maintain pressure, ensuring that the descent speed does not alter due to heavy objects. Lastly, the throttle valve controls the flow and manages the descent speed to ensure a smooth operation.
To guarantee the reliability and safety of braking systems and prevent unwanted accidents, hydraulic control one-way valves, also known as hydraulic locks, have been incorporated to ensure a secure self-locking mechanism in the event of hydraulic pipeline ruptures. Additionally, an overload sound control alarm has been installed to differentiate between device malfunctioning or overloading. To maintain load increase or decrease, the explosion-proof electromagnetic directional valve can be reversed through the rotation of the motor using explosion-proof buttons. The delay timing is adjusted via the "LOGO" program to prevent the frequent motor-restart-induced phenomenon of rigid lifting and jamming, thus increasing the longevity of the system.
Scissor fork lifting platform
The cargo platform can be lifted and lowered easily by using a scissor type support frame and an oil cylinder system. The support frame expands and folds in tandem with the extension and contraction of the oil cylinder, providing safer and more efficient high-altitude operations. However, since the oil cylinder's expansion and contraction speed is regulated by the oil pump's flow rate, the speed is generally slow, set at 200mm/minute. Connecting the oil cylinder is a Φ6mm oil inlet pipe, so if the pipe breaks, the hydraulic oil can only flow back to the inlet via this limited diameter, resulting in a slow descent speed. Nonetheless, this designed system ensures that there is no damage or loss due to slow operations.
Disabled lifting platform
In order to provide more convenient travel and tourism options to people with disabilities, accessible elevators are now becoming a common feature in communities, hospitals, schools, hotels, public areas, and tourist spots. These elevators are placed beside the escalators and are designed in a way that wheelchair-bound individuals can easily enter and exit them. All that the disabled person needs to do is to press the help button located at both ends of the elevator, and the elevator operator will promptly start the automatic elevator. Installing accessible elevators in public places is a smart move as it allows people with disabilities or limited mobility to easily access different floors in buildings and enjoy their surroundings without any hindrance.