How To Prevent Expansion Bolts From Breaking During Use

 Expansion bolts may break during use. Although the probability of this happening is very small, it is possible. How to prevent expansion bolts from breaking when we use them?

Expansion bolt is a special threaded connection used to fix pipeline supports/hangers/brackets or equipment on walls, floors, and columns.
Fixation principle of expansion screw: The fixation of expansion screw is to use the inclination of the shape to promote the expansion to generate friction and grip force, so as to achieve the fixing effect. One end of the screw is threaded, and the other end has a degree of taper. There is a steel sheet on the outside, and there are several cuts in the half of the iron sheet cylinder. Put them together into the hole made on the wall, and then lock the nut. The nut pulls the screw outward, and pulls the vertebra into the steel sheet cylinder. The steel sheet circle The cylinder is expanded, so it is tightly fixed on the wall, and is generally used for fastening of protective fences, awnings, air conditioners, etc. on cement, bricks and other materials. However, its fixation is not very reliable. If the load has a large vibration, it may loosen, so it is not recommended to install ceiling fans, etc.
The principle of the expansion bolt is to drive the expansion bolt into the hole on the ground or the wall, then use a wrench to tighten the nut on the expansion bolt, the bolt goes out, but the outer metal sleeve does not move, so the big head under the bolt will move The metal sleeve expands to make it fill the entire hole. At this time, the expansion bolt cannot be pulled out.

1. Select expansion bolts produced by supporting factories.
2. When assembling the expansion cover, use a torque wrench and tighten it according to the specified standard to prevent the torque from being too large or too small.
3. During each maintenance, the newly replaced expansion bolts should be inspected. Pay attention to whether there are cracks or dents on the head of the bolt, the guide part, and each part of the thread, and whether the tooth shape and pitch of the thread are abnormal.
4. Every time you run 12,000km for secondary maintenance, you should remove the engine oil pan and check the use of the engine bearings. If you find that the gap between individual bearings is too large, you should replace them, and you should also replace the expansion bolts at the same time. If you find that the engine is not running smoothly or makes abnormal noise during normal operation, you should also stop and check in time.

The above is the method to prevent expansion bolts from breaking, that is, we need to pay attention to the maintenance of bolts and use qualified bolts in normal times.