Basic Requirements for Gate and Rake Mechanisms Used in Operation of Gate and Rake Equipment

Featuring advantages such as ease of automation and remote operation, the capacity reaches up to 8000 kN or more, and the stroke exceeds 12 meters. They are divided into single-acting and double-acting types based on their working characteristics. The former applies pressure oil to the cylinder's piston rod chamber during gate lifting, while the gate's own weight closes it. The latter applies pressure oil to both the cylinder's piston rod chamber and the piston chamber, allowing the piston rod to withstand tension or pressure, achieving the purpose of opening or closing the gate. In terms of cylinder quantity, there are single-point and double-point hydraulic hoists, with the latter requiring synchronized stroke of two cylinders to ensure smooth lifting of the double-point gate. There are various types of hydraulic hoists based on their configuration, including fixed, floating, vertical swing, and horizontal swing. Mobile hoists consist of lifting mechanisms, moving mechanisms, gate frames, power supply units, operator cabins, and mechanical rooms; the gate frame also features a rotating crane or a single-beam crane as a secondary hook. They come in various styles such as gate-type, semi-gate-type, bridge-type, trolley-type, and single-track electric hoists; in addition, there are those using truck or crawler cranes as mobile hoists. These hoists can be categorized into single-direction and double-direction types based on their mobility range. The former is suitable for gates where the lifting centerline is on the same axis in the plane, while the latter is suitable for gates with lifting centerlines on multiple axes. Mobile hoists can lift gates using segmented pull rods, or automatically hook or unhook gates using an automatic挂钩梁. They can travel along straight or curved tracks.

Hoisting machinery used for operating gates and silt traps. Basic requirements for hoisting machinery include:

① Operations: Safe and Reliable

②Easy operation and maintenance

③Simple structure, compact size, lightweight, and aesthetically pleasing.

④ Low cost of construction and maintenance.