Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method

Detection vehicle for static load test of single pile in foundation piles

The invention discloses a detection vehicle for a static load test of a single pile in foundation piles. The detection vehicle comprises a bearing vehicle (8), a crane (2), a pile pressing machine (1), a pressure-measuring pedestal (9) and a lifting jack (11), wherein a pressure-measuring main beam (3) is arranged on a chassis of the bearing vehicle (8); the pressure-measuring pedestal (9) is arranged in the middle of the pressure-measuring main beam (3); the pile pressing machine (1) and the lifting jack (11) which are positioned on the front and rear of the pressure-measuring pedestal (9) are respectively arranged on the pressure-measuring main beam (3); a square beam (14) and a bearing leg (4) are arranged at two ends of the chassis of the bearing vehicle (8); a bearing leg cylinder (12) is connected to the bearing leg (4); two sides of the pressure-measuring main beam (3) are hinged with a pressure-measuring supporting beam (5); and a pressure-measuring supporting beam cylinder (13) ...

Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method

The present invention relates to inert gas protected automatic narrow gap tungsten electrode welding process for large thick pipe with diameter over 325 mm and thickness over 40 mm. The automatic welding process includes forming combining chamfer in the opposite ends to be welded before welding, bottoming welding, single layer filling welding, and covering welding in linear or swinging weld pass. The process has less filled deposited metal, low welding cost, high welding efficiency and other advantages.