The nut block is connected to the nut block welded to the inner side of the upper and lower flanges of the screen box, and is machined into an internally threaded hole with a length of cylindrical section. After the screw passes from the side of the steel frame through the cylindrical section of the nut block, the internal thread is screwed and fastened. This connection extends the length of the screw and improves fatigue resistance. It should be mentioned that if the nut block is machined into a full thread, or the nut block is placed in the reverse position, the end of the thread is in the shear plane, which is incorrectly designed. If the screw and the nut block are not concentric, When equipped with interference, it is easy to cause fatigue fracture of the root of the thread (in the shear plane) under the action of alternating shear. Bolt thick pad connection If it is difficult to guarantee the concentricity of the screw and nut block, or if the above-mentioned method cannot be adopted due to the structural limitation of the special-shaped steel pipe support pipe, the pad can be thickened on the side of the bolt head to extend the bolt length. The bolt holes of the blue bolts are appropriately enlarged to be able to be freely loaded into the bolts, and the holes facing the thick mats are processed in accordance with the normal fitting of the bolts, and the bolts are freely assembled in position without interference, and the gap is matched by the hand feeling, and the thick pads are spot-welded and tightened tightly. Firmware and solder the thick pads. As shown in Figure 7. For the same reason, it is also OK to place a thick pad on the side of the steel frame. In this way, concentric assembly is achieved for the coupled members of different sizes and sizes, and the fatigue resistance is also improved. In addition, in order to increase the friction between the flanges, a long strip of steel can be added to change the friction surface from 1 to 2.3.4. Surface quality requires that the surface of the fastener is not allowed to have scratches such as scratches and bumps. It must be treated with anti-corrosion treatment and must have a performance level mark. Vacuum Glass For Passive House
The passive room requires very low building energy consumption (annual heating or cooling demand per unit area ≤ 15kwh-2a-1), and the external windows of the building are required to have excellent daylighting, thermal insulation, thermal insulation and sealing performance. If required, the U value of heat transfer coefficient of external window shall be ≤ 0.8W / (M2·K). Building glass accounts for about 70% of the area of the outer window and plays a major role in the daylighting, thermal insulation and thermal insulation performance of the outer window. Therefore, the passive room has high requirements for window glass. ICESUN vacuum glass has a series of obvious advantages including long lifespan, wide application fields, super sound proof performance and good anti condensation, which makes vacuum glass for passive house widely praised. Besides, ICESUN also can provide high quality Safety Vacuum Glass for other buildings, such as Vacuum Glass For Greenhouse, Vacuum Glass For Sun Room and so on.
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