【正文】 losely adheres to the wall of the pipe。 a gas filling tube passes through the balloons, which can fill in welding protective gas to the cavity formed by the pipe wall after the two balloons are expanded。 an exhaust pipe also passes through the balloons, and the gas in the cavity can be exhausted to the outside by the exhaust pipe. When butt welding of pipe fittings is performed, the two balloons are respectively arranged at both sides of a joint, and the two balloons are charged by gas through the expandable tubular。 the bulge and the inner wall of the pipe press closely, and an independent cavity can be formed with the pipe wall。 welding protective gas is charged into the cavity by the gas filling tube, meanwhile the air in the cavity is exhausted by the exhaust pipe。 when the cavity is pletely filled with welding protective gas, welding can be performed. The protection device of the invention has the advantages that, not only is the amount of the welding protective gas greatly reduced, air emptying time before welding and gas filling time of the welding protective gas are also greatly reduced, therefore welding efficiency is improved.101323068A本發(fā)明涉及一種降低焊接變形的側(cè)向頂出機構(gòu)，按照本發(fā)明提供的技術(shù)方案，在導滑座上開設有，在滑槽內(nèi)滑動連接有若干滑塊，所述滑塊的內(nèi)壁面圍成倒錐狀的凹腔，在該凹腔內(nèi)插接有與其吻合的壓塊，所述壓塊下段呈倒錐狀的桿狀體，在導滑座上端面開設有限位凹陷，并在導滑座上設有蓋板，在蓋板上設有嵌入限位凹陷內(nèi)的防脫銷，在蓋板上開設有通孔，汽缸連接軸的底端部穿過該通孔連接在壓塊的頂端部。本發(fā)明使用時，可使工件的焊接變形區(qū)域預受力，當焊接完成后工件變形可明顯變小，提高工件焊接品質(zhì)并降低焊接廢品率。The invention relates to a lateral ejection mechanism used to reduce welding deformation. According to the technical proposal provided by the invention, a sliding chute is arranged on a slide guiding seat。 a plurality of sliders are slide connected in the sliding chute。 the internal walls of the sliders forms an inversed conical recessed cavity, and a press piece matched with the recessed cavity is inserted in the recessed cavity。 the lower section of the press piece is an inversed conical rod like body。 a stop depression is arranged on the upper end face of the slide guiding seat, and a cover plate is arranged on the slide guiding seat。 a disconnection preventing pin embedded in the stop depression is arranged on the cover plate。 a through hole is arranged on the cover plate。 the bottom end of a cylinder connecting shaft passes through the through hole and is connected with the top of the press piece. The lateral ejection mechanism has the advantages that, during use, the welding deformation area of a workpiece receives force in advance, and when welding is pletely, workpiece deformation is obviously reduced。 workpiece welding quality is improved, and welding reject rate is reduced.101323069A本發(fā)明公開了全互換快裝塔節(jié)連接耳板焊接工裝，其結(jié)構(gòu)包括機架和定位裝置，所述的機架上方設置定位裝置，所述的定位裝置包括箱形板、加強板、主弦桿定位板、連接耳板定位板，所述的箱形板呈“I”形，設置于機架上，主弦桿放置于箱形板的兩側(cè)內(nèi)凹處，所述的箱形板的兩側(cè)的上下端頭設置有定位托架，而定位托架外側(cè)表面分別設置有主弦桿定位板、連接耳板定位板。本發(fā)明的全互換快裝塔節(jié)連接耳板焊接工裝，提高裝配質(zhì)量、降低變形超差、解決運輸困難、提高工作效率、實現(xiàn)高效互換的主弦桿連接耳板焊接工裝。The invention discloses a fullinterchange fastassembly tower section connecting ear plate welding tooling, prising a frame and a positioning device。 the positioning device is arranged above the frame。 the positioning device prises a box plate, a reinforcing plate, a plurality of main chord locating plates and a plurality of connecting ear plate locating plates。 the box plate is Ishaped and is arranged on the frame。 the main chord is arranged on the inner concave part at both sides of the box plate。 a plurality of positioning brackets are arranged at the upper ends and the lower ends of the two sides of the box plate。 the external surfaces of the positioning brackets are respectively provided with the main chord locating plates and the connecting ear plate locating plates. The fullinterchange fastassembly tower section connecting ear plate welding tooling of the invention has the advantages of improved assembly quality, reduced deformation overproof, solution to transportation difficulty, and improved work efficiency, and the high efficient interchangeable main chord connecting ear plate welding tooling is realized