3results about How to "Improve splicing strength" patented technology

The invention provides a catheter, which at least comprises a polymer layer, the polymer layer at least comprises a transition structure, the transition structure is a tubular structure, the transition structure comprises a single material area and a mixed material area, any one continuous closed area in the single material area is called as a first sub-area, and any one continuous closed area in the mixed material area is called as a second sub-area. Any one continuous closed area in the mixed material area is called as a second sub-area, any section of the transition structure in the axial direction comprises at least one second sub-area, and the starting section or the ending section of the transition structure comprises at least one first sub-area and at least one second sub-area; the edge of one end of the mixed material area is an inclined surface which forms an inclination angle with the axial direction of the conduit, and the edge of the other end is a right-angle surface perpendicular to the axial direction of the conduit.

A coiled material splicing device comprises a machine table, a feeding mechanism, a conveying mechanism and a splicing mechanism, and the feeding mechanism, the conveying mechanism and the splicing mechanism are arranged on the machine table. The conveying mechanism and the feeding mechanism are arranged side by side, a conveying path is formed between the conveying mechanism and the feeding mechanism, and a coiled material on the feeding mechanism bypasses the conveying mechanism along the conveying path; the splicing mechanism is located between the feeding mechanism and the conveying mechanism, the splicing mechanism is located below the conveying path, the splicing mechanism comprises a splicing platform, a plurality of adsorption holes are formed in the splicing platform in a penetrating mode, the adsorption holes can be communicated with a vacuum device, and the splicing platform is used for adsorbing the coiled materials. According to the coiled material splicing device, new coiled materials and old coiled materials can be spliced and fixed conveniently, operation is convenient and fast, splicing efficiency is high, splicing can be completed by one person, manpower is reduced, and splicing strength can be improved.

The application belongs to the technical field of bridge engineering, and particularly relates to a shear key formwork device for segment splicing box girder. The structure of the shear key formwork device comprises a head formwork unit, an opening hole arranged on the head formwork unit, a protruding shell arranged on the head formwork unit and covering the opening hole and used for being inserted into the opening hole on the adjacent head formwork unit or the box girder concrete body, and a tensioning opening hole arranged on the head formwork unit and used for penetrating through the steel strand. The beneficial effects of the application at least include that the shear key formwork is used in pairs, one of which inserts the protruding shell into the box girder concrete body as the female die part of the shear key, and the other exposes the protruding shell as the male die part of the shear key, so that the segment splicing box girder is formed together with the complete shear key structure, and the splicing and installation operation is more convenient and efficient.