Hydraulic water conservancy equipment is gradually eliminating the traditional dam type in the treatment of small and medium-sized rivers in China, and is widely used. Due to the advantages of high installation and construction efficiency, convenient operation and good effect of water retaining and flood discharge, Hydraulic steel dam It has become a good choice for farmland irrigation and water conservancy, urban landscape water conservancy construction and other projects.
Influenced by the hydrological characteristics and flood characteristics of the river, its necessary functional characteristics are: there are enough flood outlets in flood season; Flexible hoisting operation, combined with flood forecasting, dispatching and dispatching; Try not to raise the flood level in the upstream during the flood season to avoid the flood control pressure in the upstream; Long service life, reliable structure, impact resistance and abrasion resistance of water retaining and discharging structures.
As a water retaining structure, steel dam has a history of more than 100 years. The steel dam face plate is connected with the components by welding or bolts. It makes full use of the high strength and flexibility of steel, so that the dam body has good integrity and flexibility, and can better adapt to the deformation requirements of water bodies. This is a very advanced new dam technology. The mechanical principle of dump truck does not need to worry about sediment deposition. Its mechanical structure can easily wash away the garbage on the water surface, which is conducive to keeping the river clean.
At the same time, in hilly areas, the riverbed is relatively narrow, especially in cities with limited layout space on both banks. Hydraulic lifting dam The number of buildings and river courses shall be minimized, the land occupation and excavation scope shall be reduced, and the plane layout shall be compact and reasonable. The main flood discharge structures shall be arranged in the main river channel of the river course, and the layout of the main river channel shall be orthogonal to the flow direction, so as to greatly reduce the impact on the changes and flow of the original river course. And these requirements, our Hydraulic dam The equipment can be easily competent.
Hoist It can be said to be the power core of a hydraulic lift dam. We will be more cautious and careful in the construction and installation of related projects. This is the foundation for the operation of the lifting dam equipment. Once there is some negligence in the installation, it may lead to abnormal operation conditions such as jamming, sliding, failure to open and close, and semi open and close. At that time, they will have to rework and repair, waste manpower and material resources, and delay the operation time. After years of experience in installation and construction, here are a few screw type Installation of hoist Precautions, to provide you with a little help and reference.
Install the hoist according to the gate opening and closing center line, and align the center so that the vertical and horizontal center line deviation is not more than plus or minus 3mm, and the elevation deviation is not more than plus or minus 5mm. Then pour the second phase concrete or connect with the embedded steel plate. Ensure that the foundation plane is 180o, and the contact area between the lifting base and the foundation layout plane should be greater than 90%; The spiral axis shall be perpendicular to the horizontal plane measured on the gate platform; It shall be perpendicular to the text of the lifting lug hole to avoid the inclination of the screw; Cause local stress and parts damage.
The installation of hoist electrical equipment shall meet the requirements of drawings and instructions, and all electrical equipment shall be reliably grounded. The installation of hoist foundation must be stable and safe. The concrete of foundation and foundation components shall be poured according to the drawings. When the concrete strength cannot reach the design strength, it is not allowed to remove and replace the temporary support of the hoist, nor to conduct commissioning. Place the crane in the installation position. Place the limit plate on the screw, screw the screw into the hoist from the lower part of the beam, and set the upper limit plate when the screw is exposed from the upper part of the hoist. The lower part of the screw is connected with the gate. After the installation of each hoist, clean the hoist, repair the damaged protective paint, and add lubricating grease.
