What potential safety hazards may arise when using vertical circulation equipment, and how can they be addressed?

When using Vertical circulation equipment At times, due to various uncertainties, certain safety concerns may arise during operations. In summary, the main points are as follows:

① Loss of control and overspeed. During lifting operations, if the brake fails, or if the gear teeth, shaft, key, or pin of the reducer breaks, or if the hoisting rope slips severely or snaps, the crane will lose control and its operating speed will exceed the limit.

② Terminal overtravel. When the leveling control circuit malfunctions and the car reaches the top or bottom floor, it may overshoot its normal position or continue running, resulting in up-and-down jerking.

③ Operation failure. When the speed limiter malfunctions, or when the motor is connected with either correct or incorrect phase sequence, the hoisting system is said to be operating under fault conditions.

④ Sudden cessation of movement. Due to Vertical circulation equipment In the event of a control system failure or a grid power outage, the hoisting system will shut down abruptly.

In order to protect Vertical circulation equipment To ensure the safety of parked vehicles and prevent accidents, it is necessary to design and select various safety mechanisms. In light of the aforementioned safety hazards, the primary safety strategies employed in vertical circulation systems are as follows:

① Overspeed protection system: speed governor, safety gear.

② Bottom buffer device: Buffer device.

③ Protective devices for when the working position exceeds the upper and lower limits: forced deceleration switch, limit switch at the terminal, limit switch at the terminal.

④ Phase-loss in the power supply system and phase-loss protection device: phase-sequence protection relay.

⑤ To enable emergency stoppage, a manual crank has been installed on the traction unit, allowing the crane to be moved manually.

Haiyue Technology Group Co., Ltd. was established in July 2014 with a registered capital of RMB 180 million. Headquartered at the Midea Cai Zhi Center in Guanshanhu District, Guiyang City, Guizhou Province, the company is a group‑managed enterprise comprising three core business segments: intelligent multi‑level parking garage construction, real estate development, and the construction industry. In accordance with the Group’s strategic plan: Vertical circulation equipment The research, development, and construction of intelligent multi‑level parking garages will serve as the Group’s primary strategic focus following its innovation‑driven transformation, with the aim of pursuing an IPO.