There are various large and small equipment in the water plant, which participate in the entire production process of tap water. In recent years, with the increasingly stringent environmental requirements, the status of the sludge dewatering system in the water plant has become higher and higher. Its normal operation directly affects the normal operation of the entire water treatment process in the water plant.

In the sludge dewatering workshop, there is a third stage inclined conveyor of the sludge spiral conveying system, which suddenly malfunctioned, causing the entire sludge dewatering system to pause operation. When the maintenance personnel arrived at the scene, they found that it was caused by a broken connecting shaft between the reducer and the conveyor screw.

The primary task for repairing this equipment is to disassemble the components, including bolts, covers, and reduction motors, which have been successfully removed and sent to the machine repair workshop. However, the connecting shaft is very difficult to disassemble due to breakage. The construction personnel used a hydraulic jack to lift the machine repair equipment and remove the broken shaft in the reduction gearbox.

A hydraulic jack is a mechanical device that applies pressure to hydraulic oil manually, replacing a large capacity with a small capacity and expanding the contact area between the hydraulic oil and the sleeve to achieve uniform pressure diffusion and push the sleeve up. The advantage of a hydraulic jack lies in its strong force and the ability to quickly return under the action of its unique internal valve switch.