At present, there are many kinds of expansion screws on the market, their uses are also different. In many buildings, rough installation will directly affect the use of expansion screws. Often because of improper installation, the fixing effect of expansion screw will be reduced, such as a long time, loosening so on. Now I would like to introduce how to install the expansion screws commonly used in elevator industry, curtain wall industry, nuclear power industry rail transit industry

Type 1: sleeve expansion screw

We can often see this kind of expansion screw, whether it is hardware stores our family installation of air conditioning, clothing rope, etc. We often install it like this: after drilling the hole, we insert the expansion screw into the hole, then tighten the screw.

But in the design of casing expansion screw, we are required to achieve the most Good results, then we need to different materials of casing expansion screws, size gaskets nuts according to the concrete of different materials; then, we need to the appropriate drill bit according to the diameter of the casing, the general manufacturer will give the relevant installation parameters; thirdly, we need to drill holes, because of the particularity of the casing expansion screws, we need to be perpendicular to the concrete as far as possible Drill a hole 10 mm deeper than the expansion screw on the soil surface, the drill bit can be pushed back forth several times to achieve the hole wall integrity; fourth, hole cleaning, in the actual construction site, few workers will go to clean the hole, other residual concrete in the hole will greatly affect the anchoring effect of the casing expansion wire installation. We need to use a fine wooden stick, brush special hole cleaner to put the hole in Fifth, after cleaning the hole, we need to insert the casing expansion wire into the hole. As the casing screw are tightly bonded, we need to knock the casing. Please note that when installing the expansion screw of the casing, few people will use to knock the casing. Knocking the casing can make the expansion screw to a large extent The final anchoring effect of the wire is very good, when tightening the nut, it is easy to expand the casing; sixth, after knocking, we can install the objects we need to carry, such as steel plate, bracket, etc., after installation, we use the torque wrench to tighten the nut. Such an installation process is complete.

The second kind: screw expansion screw

the structure, we can easily see that the difference between this expansion screw the upper sleeve expansion screw lies in the expansion part. The sleeve is expanded by combining the taper of the sleeve the screw, the vehicle repair depends on the expansion plate embedded at the bottom of the screw. If the steel bar is short, the installation effect can be affected if the screw is inserted into the bottom of the steel bar, the installation effect can be affected if the screw is short. Now that we understand the screw type, that is, the structure of the expansion screw for vehicle repair, let's understand the installation process:

Elevator expansion screw installation after understanding will be simple easy.