1. Welding deformation should be strictly controlled in the on-site assembly of cast iron gate:

(1) Welders engaged in field installation welds must hold useful passing certificates;

(2) Nondestructive testing personnel must hold the qualification certificate issued by the national professional section, and the weld quality assessment shall be conducted by the inspection personnel of Grade Ⅱ or above;

(3) Each batch of welding data must have the product quality certificate and application copy, and sampling inspection;

(4) The appearance reflection and non-destructive inspection of all welds shall be carried out in accordance with the rules of "Manufacturing Device and Acceptance Standard for Steel Gate of Water Conservancy and Hydropower Engineering" (DL/T5018-94). In addition to conforming to the above standard rules, the spot check rate of non-destructive weld testing must also follow the supervision's designation, spot check prone to defects;

(5) In the process of construction, it is necessary to comply with the supervision instructions to effectively eliminate the welding reaction force.

2, the device support hinge seat, use the hoist to lift the hinged seat aiming embedded bolts, first set aside four hole screw holes (upper, lower, left and right one each) do not tighten, reflect on the gap between the hinged base and the chassis, adjust the position of the hinged seat, finally tighten the four hole bolts, after the hinged seat device, strictly reflect on the coaxiality of the two hinged seats, adjust each other to meet the standard requirements.

3. The entry slot for the lower half of the door leaf should be fixed with a zipper hoist before the arm assembly.

4. Connect the entry slot of the arm crane with the hinge shaft first, and then connect with the door leaf through the connecting bolt. After the left and right arms are installed, reflect on the size of the device, and weld after passing the size.