Whereas Hydraulic hoist It has many advantages such as simple structure, compact layout, large bearing capacity, convenient speed regulation and commutation, smooth operation, easy automatic control, etc. It is appropriate to select hydraulic pressure in hydropower project construction Hoist Significant engineering benefits can be obtained. As mentioned above, hydraulic hoists are mainly used for radial gates, miter gates, fast gates and high head, large capacity deep hole gates.
With regard to surface or deep hole radial gates, under the circumstances of large orifice and large opening force, especially the environment where the door closing force is required because the door cannot be closed by its own weight, the hydraulic opening and closing secrets are easier to meet the use requirements than winch hoists or other types of hoists, and the synchronization problem is also easy to handle, which can also simplify the hydraulic installation and reduce the civil engineering investment, And the equipment in the link appears harmonious and beautiful, Hydraulic system The project benefits are relatively obvious. For example, the surface outlet arc type service gate of the overflow dam adopts a hydraulic hoist, which saves the overhead hoist working bridge on the dam crest, and the dam surface is compact and does not affect the traffic; In terms of project investment, although the unit price of hydraulic hoist is relatively high, its weight is relatively light, and the investment in civil engineering is reduced. Table 3 is based on the cost of 1993 Hydraulic hoist Compared with the economy of the two plans of winch hoist, the total cost of the two plans is not much different. However, the hydraulic hoist plan has many advantages, such as reliable work, safe hoisting, convenient construction, flexible driving, and convenient intensive control. The overall engineering benefit of the hydraulic hoist is better than that of winch hoist.
With regard to the miter gate, slot gate and filling and discharging service gate of the ship lock, the installation of hydraulic hoists is relatively convenient, and it is also convenient to realize the automatic control of the ship lock. Among them, the lock chamber of the ship lock is 190m long, 23m wide, 3.5m deep above the sill, 12.5m high water head, and the hydraulic hoist has a good operating environment, meeting the navigation requirements of the main shipping line in Guangxi. Its successful operation has provided precious experience for the use of hydraulic hoists in Guangxi shipping projects.
For fast gates or high head, large capacity deep hole gates, it is assumed that hydraulic hoists are used, which have complex layout, large volume, large components, and Hoist gate Generally, the door can be closed only when it is intensified. Some layouts are more difficult to deal with. Assuming that hydraulic hoists are used, it is relatively easy to meet the requirements of speed regulation and large capacity. Moreover, the double acting hydraulic hoists have a fast closing time, which can meet the requirements of door closing force, and can reduce the investment in gate amplification. Plane quick gate of powerhouse intake, orifice size (width × Height) is 8.2m × 14.1m, the planned water head is 48m, the required opening force is 8000kN, and the closing force is 6000kN. For such a super large fast gate, if winch or other types of hoists are selected, it is very difficult to meet the requirements of the plan and use. However, the use of hydraulic hoists has handled a major difficulty for the project construction, and has obtained relatively obvious engineering benefits.
