What are the hazards of improper design of curtain wall electric window opener

What are the hazards of improper design of curtain wall electric window opener?

1. The aluminum alloy material used for the opening window, according to the curtain wall industry standard process and structural safety requirements, a complete set of opening window frame and window sash should be assembled into an integrated unit structure in the factory by corner code. When checking and dealing with problems in specific projects, it is often seen that the opening frame of some projects does not adopt corner production process, Alternatively, the four edges of the frame material are transported to the project site as bulk materials, and the installation of the opening frame is completed in bulk through the site. The aluminum alloy fan frame that only opens the window is produced by the process of corner assembly in the workshop. Since then, the corners of the opening frame of the project are often misaligned, light leakage (transparent), and the inner diameter of the frame is changed. In addition, the combined size between the aluminum alloy fan frame and the frame of the opening window is changed, the stress condition of the relevant stainless steel hardware is changed, and the gap of the closing lock point is changed, resulting in the change of specific methods, etc, This series of changes may cause the overall fall of the opening window sash.

2. The opening hardware used to open the window of the curtain wall generally has two parts. The first is the open load-bearing stainless steel hinge structure, and the second is the lock structure with safety closing function. If the purchase of one part of the structure of these two parts is improper, it will be determined that there is a problem in the structure of the open window sash.

① Material selection: the stainless steel opening hinge should be made of stainless steel. If the material selection is not seriously inspected and accepted, or the supplied material is indeed made of stainless steel and the hinge structure has defects (cracks that can never be seen carefully), it will lead to bolt corrosion and gradually obvious cracks within the project life cycle;

② In terms of safety: the lock point of the opening window should be a surplus point structure (at least 2 points). Up to now, some projects also adopt the most general single point structure (commonly known as the seven character handle). In fact, the material of this structure is die cast aluminum, which has only one single claw, It often falls off and loses safety function because of the performance of bearing external force and imperfect installation; In addition, some projects adopt hinge suspension structure on the opening mode. In fact, the material of this structure is die cast aluminum. The density of the material casting is enough or has not been subject to rigorous structural stress calculation. Within the service life cycle of the curtain wall, due to the fracture of the hinge, the whole opening window sash may fall.

3. If the curtain wall of a project is opened and the window sash is opened, up to now, we may notice how many there are no supporting plates on the top of the opening window sash. This problem should never happen. Since the release of China's technical code for glass curtain wall engineering jgj102, there have been strict requirements for the setting of supporting plates, so there is no more to say here, Perhaps the top of some open sash glass is indeed provided with a supporting plate structure, but the structural cantilever length of the supporting plate does not drag the innermost piece of glass. It is still the glass structure of this open sash. We are in a state that we are not safe and may fall in real time.

4. In some glass curtain wall projects, the construction drawings of the consultant and the construction unit were deepened in the bidding process, and the safety measures of setting edge sealing around the opening glass were comprehensively adopted. However, due to poor consideration of the structure and lack of production experience in specific workshops, the safety edge sealing structure could not achieve real safety, Since the structural sealant is used for the bonding of insulating glass and the structure for aluminum alloy bonding are never in the same plane and straight line, the glass will have potential safety hazards of falling.

5. Some project renderings are indeed very beautiful. If you open the construction process drawings, you can never see the existence of potential safety hazards. If you open them twice, the glass curtain wall of the whole project not only adopts large and small pieces of specific glass, but also large and small pieces of window sash glass. For this kind of structure, there may be hidden dangers of glass falling in real time.

6. Some projects may never know how to solve the structural safety problem of opening the window sash, so they simply bond the glass plate to the aluminum alloy opening sash frame without thinking. Knowing that this structure is never safe, it can be done. Moreover, if some projects are installed according to the expression of the construction drawing, the opening frame materials used will never be installed, so they can not meet the long-term weather sealing performance. In other words, due to improper consideration, not only the safety problems, but also the functionality will be affected.