Expansion screw introduction

Updated:17-09-2020
Summary:

Expansion screws use wedge-shaped slope to promote expa […]

Expansion screws use wedge-shaped slope to promote expansion to generate frictional binding force to achieve the effect of fixing. Expansion screws are flat after use due to small drilling, large tension, and can be removed at will if they are not used, and the advantages of keeping the wall flat are significant. , Widely used in various decoration occasions, entered the domestic market in 2013, suitable for concrete embedding related operations. Such as: building curtain walls, interior decoration, air conditioning, lighting, advertising billboards, TV wall hangings, bathroom (kitchenware) water and electricity, monitors and other related industries and fields. Next, the editor of Xianji.com will introduce to you how to make expansion screws? Installation precautions, working principle, scope of use, grade classification, advantages, compression resistance, detection methods and specifications and models.

   Expansion screws use wedge-shaped slope to promote expansion and generate frictional binding force to achieve a fixed effect. Its working principle is: the expansion screw is composed of a screw and an expansion tube. The tail of the screw is cone-shaped, and the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outwards, and the conical part moves through the axial movement of the thread, thereby forming a large positive pressure on the outer peripheral surface of the expansion tube, and the angle of the cone is small, so that the wall and the expansion tube Frictional self-locking is formed between the cone and the cone to achieve a fixed effect. But how should we use expansion screws? How to install plastic expansion screws, and do the lamb nail sleeves go in or screw in? For these more common content about plastic expansion screws, today the editor of Xianji will introduce to you in detail.

  In fact, the installation method of plastic expansion screws is very simple. The tools needed are electric drills, drills, hammers, screwdrivers, etc. Choose a drill with the same size as the outer diameter of the plastic expansion screw. The depth of the hole is 2mm deeper than the total length of the plastic expansion screw. After the hole is drilled, the plastic expansion screw sleeve is driven in. Then use a screwdriver to tighten the screws and lock the items to be installed. The hammer type is hammered in, the others are screwed in. You can look at the installation diagram of plastic expansion screws to get a better understanding. However, there are some things to pay attention to when installing plastic expansion screws:

   Expansion screw, expansion bolt, screw, bolt

       1. Punching depth: The relevant information describes the length of the expansion tube, but I found that this depth is not enough during the specific construction, which may be related to the amount of debris in the hole, so you'd better be 5 mm deeper than the length of the expansion tube about. As long as you are greater than or equal to the length of the expansion pipe, the length of the expansion bolts left in the ground is equal to or less than the length of the expansion pipe.

  2. The requirement of expansion bolts on the ground is of course the harder the better, it also depends on the force of the object you need to fix. Installed in concrete (C13-15), the force strength is five times that of bricks.

  3. After a M6/8/10/12 expansion bolt is correctly installed in the concrete, its most undesirable maximum static force is 120/170/320/510 kg respectively.

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