Portal frame

About: Portal frame is a research topic. Over the lifetime, 1778 publications have been published within this topic receiving 7210 citations.

Analysis of the value and position of the extreme bending moment and the contraflexure point for the design of the single-span portal frame with hinged connection and a gable roof

Abstract: In accordance with the Technical Specification for Steel Structure of Lightweight Buildings with Gabled Frames,the value and position of the extreme bending moment in the oblique beam of the portal frame as well as the contraflexure point are calculated and analyzed.The results provide theoretical support for simplifying the designing procedure of portal frames.

Multifunctional portal frame welding overturning rack fixture

Abstract: The utility model discloses a multifunctional portal frame welding overturning rack fixture comprising an overturning bracket, wherein an inverted T-shaped rack is fixedly installed on the overturning bracket, an isolating sleeve is installed on the T-shaped rack in a sliding manner, symmetrical rib plates are connected on the isolating sleeve, and stop dogs are connected on the lower surfaces of the rib plates; and threads are processed on the T-shaped rack, nuts are screwed in the threads, and the isolating sleeve can freely rotate and slide on the T-shaped rack. The multifunctional portal frame welding overturning rack fixture disclosed by the utility model is simple in structure and is capable of effectively fixing various portal frames when welding portal frames with different model numbers so as to better overturn the portal frames, and the multifunctional portal frame welding overturning rack fixture is simple and convenient to use, thereby meeting the welding technical demands of forklift portal frames of different tonnages, saving the manufacturing occasion and space and also saving a large number of manufacturing materials.

Tire tread handling device

Abstract: The utility model relates to a tire tread handling device belongs to tire machinery. Be equipped with the louver car, its characterized in that, the portal frame is installed to louver car top, installs the tractor on the guide rail of portal frame, and elevating system is installed to the tractor below, and elevating system's below hinge has the sucking disc device, and tread feed frame is installed to the portal frame opposite side.

Longmen posture stone material line machine

Abstract: The utility model discloses a longmen posture stone material line machine, parallel and be convex portal frame crossbeam including convex main workstation, portal frame pillar with main workstation, portal frame crossbeam one side level is provided with the processing seat that can follow its horizontal migration, is provided with the horizontal migration mechanism that is used for driving its horizontal migration between processing and the portal frame crossbeam The utility model has the advantages of simple structure, low cost, high, the convenient operation safety of machining precision, main workstation adopts convexly for this line machine can carry out lines processing to convex stone material, solves the problem of the unable processing circular arc stone material of current line machine, will process the seat moreover and install on the portal frame crossbeam parallel with main workstation, makes the utility model discloses the structure is more stable, can process more large -scale stone material, can avoid simultaneously the not hard up problem that influences the machining precision of transmission, solve the processing emery wheel and the problem that the dislocation influences the machining precision and causes the production accident easily easily appears when high -speed the operation

Analysis of the retaining and protection mechanism of double-row cantilever piles

Abstract: The retaining and protection mechanism, structural distribution and internal forces of doublerow cantilever piles are studied and discussed on the basis of engineering practice Based on a series of reasonable assumptions, the supporting structure is considered as the portalrigid frame,and the pile top bending moment and shear force are calculated, which provide a theoretical guidance for the design of spacing between front and back piles and the embedded depth The designing and constructing process of a certain project using doublerow piles as supporting structure is introduced In this project, observation point is sited on the top beam to measure the maximum deformation of the side of foundation The results show that doublerow cantilever piles have many advantages—smaller displacement and bending moment and convenience in the construction as well