Expansion bolt is a special threaded connector, mainly used for the fixing and connection of steel structure, the connection has the advantages of strong bearing capacity, easy installation, safety and reliability, etc., and has been widely used. Let's take a look at the precautions about expansion bolts.
First of all, it is necessary to select a suitable expansion bolt model, and select according to the load and use environment according to the need to achieve a good fixing effect.
Secondly, before installing the expansion bolts, the installation position needs to be cleaned and polished to ensure the flatness and cleanliness of the contact surface. The expansion bolt is then inserted into the hole, the nut is tightened as needed, and epoxy encapsulant is injected at the same time, which enhances the shear strength and environmental performance of the connection point. Rotate the nut step by step within the torque range specified by the expansion bolt, and do not tighten the nut too much at one time, so as not to affect the expansion effect and connection quality.
After installation, the tightness of the expansion bolt should be tested to avoid potential safety hazards caused by too loose or too tight tightening. There are two detection methods: one is to pre-prepare a penetration or liquid-filled hole at the top of the end of the threaded expansion bolt, and the inspector connects the valve joint to the liquid-filled hole, applies a torque on the nut, and fills the steel bar with water or air to check whether the installation site is leaking or leaking. The second is to use a special torque tool to detect, according to the specified torque value, rotate the nut in a counterclockwise direction to detect whether the error between the torque of the loose nut and the specified torque value range meets the requirements of the specification. Only when it is certain that it is correct, can the equipment be put into use in time, and pay attention to daily maintenance, keep the expansion bolt tight, and ensure the service life.
Finally, remind everyone that when selecting and installing expansion bolts, we must pay attention to safety, operate in strict accordance with the specifications, and consult technicians in time if there is any unclear place. At the same time, the condition of the fixing parts should be checked regularly, and faults should be detected and dealt with in advance to avoid greater safety hazards.
In short, for the installation of expansion bolts, it is necessary to choose the appropriate model, pay attention to cleaning and tightening strength, timely detection, and maintain service life. In the process of use, it is necessary to pay attention to safety and keep the equipment in good condition. In this way, we can achieve better use effect and long-term safety performance of expansion bolts.