3results about How to "Security threat" patented technology

The present application relates to nuclear power drainage system construction technical field, specifically relates to a kind of drainage tunnel water filling method and jacking cap removal method, wherein the drainage tunnel water filling method includes the following steps: SA1, water is injected into siphon well until the water level in siphon well is higher than the highest point of tunnel entrance;Continue to inject water into siphon well until the water level in siphon well reaches the preset water level, the preset water level is higher than sea level;SA2, hole is opened on jacking cap or the pipeline reserved on jacking cap is opened, wait for the water level in siphon well to be flush with sea level, complete the water filling of tunnel.The present application can overcome the deficiency that there is still a large pressure difference on both sides of jacking cap after the tunnel is water-filled by the existing tunnel water filling method, and there is a hidden danger that a diver or diving equipment is sucked into the inside of tunnel by negative pressure.

This application relates to an integrated assembly and spot welding process, belonging to the field of welding technology. The production process includes the following steps: Step 101: A steel pipe alignment device is used to position two steel pipes, keeping their axes aligned, thus forming a weld between them; Step 102: A weld positioning device is used to position the weld between the two steel pipes; Step 103: A laser welding machine is used, with at least two laser welding machines spaced apart around the perimeter of the steel pipes, to weld the weld seam; Step 104: An adjustment device is used to quickly adjust the laser welding machines to the weld seam between the two steel pipes. This application eliminates the need for manual welding, prevents sparks and spatter from posing a safety threat to workers, improves the positioning efficiency of the steel pipes, and thus increases the welding speed.

This utility model relates to the field of crash barrier technology and discloses a prefabricated crash barrier template, including a base with an installation position; a combination component for rapid casting of the crash barrier, the combination component including a first template, a second template, a first connecting plate, and a second connecting plate, the first template and the second template being connected to the base by fasteners, the ends of the first template and the second template having openings, the second connecting plate being disposed on the second template, the first connecting plate being disposed on the first template, and the corresponding second connecting plate being connected to the first template and the second template by fasteners, one end of the first template and the second template having a connection port, so that the first template and the second template do not need to be removed after casting, the connecting block is embedded in the template opening and fixed by bolts to fix the first template and the second template; the energy-absorbing component and the abutment plate work together to enhance the impact resistance of the template and allow for the reuse of the template.