Hydraulic lifting dam It is a kind of integrated steel structure and hydraulic drive lifting device to form a complete set of movable hoist system. Its main purpose is to raise the dam to retain water, lower the dam to discharge flood according to the actual demand. This time, I will introduce the characteristics of the hydraulic lift dam and how to maintain it.
1、 Its structure is simple and uncomplicated, so it is convenient to build, and the construction period is short, saving money.
2、 The system is flexible and can realize automatic operation without additional human management.
3、 The hydraulic condition is superior. The dam can basically maintain the original riverbed, and can discharge flood, sediment, pebbles and floating objects accumulated in the upstream without blocking the water. At the same time, it can adjust the overflow of dam height at will, and control the upstream water level and discharge.
4、 Good durability, as long as more attention is paid to the dam sector structure and Hydraulic system Maintenance of.
5、 Wide range of applications: water conservancy irrigation, hydropower generation, urban landscaping, etc. Especially for the cascade development of urban rivers, it can form a wide water surface, increase the urban scenery right belt, and easily form a waterfall landscape on the dam body, which can effectively improve the ecological and cultural environment.
In terms of maintenance, Hydraulic dam Before use, place it flat on the ground, and inject hydraulic oil by installing the support oil filter trolley. The oil level is about 3cm below the edge of the observation port, and the oil level of the split push rod should be within 5cm from the oil tank cover plate. Connect the power supply, let the piston rod reciprocate several times, and then replenish the oil before normal use; High pressure oil pipe must be fixed with soft material cushion to prevent abrasion and fracture of oil pipe; Replace the used hydraulic oil once a year, or determine the replacement cycle according to the frequency of use; If it is not applicable for a long time, it is necessary to check the insulation of the motor and confirm whether the rotation direction of the motor is correct before reuse.
Let's talk about the lower hydraulic lift dam, which is a new type of movable dam. Its mechanical structure is scientific, and its disadvantages are optimized while maintaining the advantages of the traditional movable dam.
The advantages are as follows: it is not afraid of siltation; Not affected by floating objects. It has the characteristics of rubber dam controllable, close to the riverbed without blocking water. It has the characteristics of automatic control of flap gate dam and arbitrary maintenance of water level height. The dam structure is firm and durable, and the ability to resist flood impact is strong.
Lower hydraulic lift dam is a new type of movable dam with scientific mechanical structure. It keeps the advantages of traditional movable dam and optimizes its disadvantages.
The advantages are as follows: it is not afraid of siltation; Not affected by floating objects. It has the characteristics of rubber dam controllable, close to the riverbed without blocking water. It has the characteristics of automatic control of flap gate dam and arbitrary maintenance of water level height. The dam structure is firm and durable, and the ability to resist flood impact is strong.
The other is flap gate dam
Advantages: low cost, simple structure, short construction period, convenient management and operation; It can be automatically adjusted according to the upstream water level.
Disadvantages: It can not withstand the impact of catastrophic floods and is easily destroyed by floods. It is easy to be blocked by floating objects or silted up by mud and sand at the upstream, so that the automatic flap can not be turned, affecting the safety of flood control. After the flood, the flap door is stuck by foreign matters when it is closed again, unable to work normally for water storage, and the upstream floating objects can not be cleaned, making the river course messy.
Three types are rubber dam
This is the active dam technology that is widely used in the world at present.
Advantages: simple structure, large dam span, light deadweight, good seismic performance, close to the riverbed without blocking water, and beautiful dam type.
Disadvantages: poor safety and reliability, short service life, easy damage of dam bag, difficult management and operation.
