32 results about "Large elbow" patented technology

The invention relates to a location device for large elbow and the processing method for the clipboard. The location device comprises bottom plate and several clipboards. Clipboards are fixed with the bottom plate. The clipboard comprises bottom part, left wing and right wing. The whole is in V-shape and the left wing is symmetric to the right wing. Circles set by any symmetric points on inner sides of two wings are coincidence with the cross section of large elbow which is set at two points. The machining method is that the clapboard is produced by adopting marking and cutting method on steel plate. The clipboard produced by the method has performances of automatic centering and automatic aligning welding line and makes the motion track of concave welding line of workpeice is changed into circle track. It solves difficult location problem in automatic welding for large elbow. The method provides a simple and easy production method for producing clipboards of location device for large elbow. The produced clipboard is provided with simple structure and low producing cost.

The invention discloses a specific assembling method of a tool for forming the large elbow. The tool comprises four H-shaped steel, wherein a plurality of steel plates are respectively connected onto each H-shaped steel, the number of the steel plates is determined according to elbow parameters including external diameter, bending angle and linear segment length which are required by elbow forming, a round hole is formed in each steel plate, the diameter of the round hole equals to the external diameter of the elbow to be installed and formed, the two ends of each H-shaped steel are respectively connected with a ring plate, and a backing ring is connected onto the external diameter of each ring plate; and a method for specifically installing the tool for forming the elbow comprises steps of horizontal reference plane determining, H-shaped steel 1 and H-shaped steel 2 installing, steel plate installing, H-shaped steel 3 and H-shaped steel 4 installing and backing ring installing. By the tool, the forming technical problem of large pipelines with cross sections which are formed by installing and welding steel pipes of a plurality round straight pipes, omega-shaped straight pipes, polygonal straight pipes and the like is solved, and the tool for forming the large elbow is simple in structure, is convenient to install, can be repeatedly used, has higher precision and can satisfy design requirements during the practical application.

The invention discloses a large elbow structure of an axially floating type recirculation annular combustion chamber, which belongs to the field of aerodynamics, and specifically relates to the field of miniature recirculation annular combustion chambers, in order to solve the existing problem that the self-regulation cannot be realized according to different working conditions of the engine. The temperature defect of the inner wall of the large elbow includes a diffuser assembly, a flame tube assembly, and a turbine guide assembly. The diffuser assembly is provided with a plurality of elastic supports, and the gap between the elastic support and the flame tube assembly is A large curved pipe is provided, and the large curved pipe is fixed on the turbine guide assembly, and a cooling gap is formed between the large curved pipe and the flame tube assembly. The large elbow and the flame tube assembly are set separately, and at the same time, the elastic support is in surface contact with the large elbow, so that a cooling gap is formed between the large elbow and the flame tube assembly. The cooling air entering different gap values ​​is different, and the cooling effect is different. The effect of independently adjusting the temperature of the inner wall of the big bend is realized, and the service life of the big bend is increased at the same time.

The invention discloses a double-walled large elbow. The double-walled large elbow comprises an inner wall component and an outer wall component which are arranged inside and outside in sequence. The inlet ends of the inner wall assembly and the outer wall assembly are connected to form a supporting structure, which is used to support the diffuser in the axial direction, and then the inlet end of the double-walled large elbow is axially limited by the diffuser. , and at the same time make the inlet end of the double-walled large elbow have free thermal expansion along the radial direction. The supporting structure is also used to support the outlet of the flame tube, so that the outlet of the flame tube is sealed and connected with the double-walled large elbow, and at the same time, the outlet of the flame tube has free thermal expansion along the axial direction. The outlet ends of the outer wall assembly and the inner wall assembly are connected to form an open overlapping structure, so that the inner wall assembly has free thermal expansion in the axial and radial directions, and the extension portion of the outlet end of the outer wall assembly forms a fixed structure. The fixing structure is also used to support the guide so that the guide has free thermal expansion in the axial direction.