Introduction to the inspection of the nodes of steel structure space frame

Introduction to the inspection of the nodes of steel structure space frame

What are the inspections of nodes of steel structure space frame?

Inspection I. Inspection of connection plate

①Check whether the specification of connection plate (especially thin thickness) is in accordance with regulations;

② Check its flatness with a scale as a level ruler;

③Accurately measure the reduction of specifications due to bolt holes, etc;

④Check that there are no gaps, partially broken and other damage.

Inspection Ⅱ: For the bolt connection, you can use the estimation, hammer knocking close combination of ways to check. And with a torque wrench (when the wrench to do a certain torque, containing sound, light labeling of the wrench) on the tightening of the bolts to carry out a review, especially in the high-strength bolts connected to each other should be carefully checked. In addition, the diameter of the bolt, the number of sorting method should also be checked one by one.

Inspection Ⅲ: Electric welding joint is widely used at this stage, and there are many safety accidents, so its defects should be checked. There are many types of defects in the weld, such as cracks, air holes, welding holes, incomplete penetration, air welding, misopening, arc pits, etc

Inspection Ⅳ: Check the weld defects, you can use ultrasonic flaw detector or radiation detector inspection. In the internal defects of the weld to carry out flaw detection before carrying out the appearance of quality inspection.

Inspection Ⅴ: The weld surface quality inspection can be estimated or with 10 times high magnification, when there are objections, the choice of magnetic particle flaw detection or penetration rubbing. If the weld shape quality does not meet the requirements of the provisions, need to carry out repair.

Inspection Ⅵ: The size of the weld is generally measured accurately with the weld inspection ruler. Weld inspection ruler by the main ruler, commonly used ruler and height ruler standard composition, can be used to accurately measure the weld welding original material weld perspective, gap, displacement, weld height, weld height, weld total width and fillet weld height.