2results about How to "Avoid Metal Fatigue" patented technology

The application discloses a petroleum conveying pipeline backwashing valve and relates to the technical field of valves.The petroleum conveying pipeline backwashing valve comprises a connecting pipe provided with threaded caps at two ends, a mounting box, a switching mechanism arranged on the mounting box and used for switching the filtering area of a filter plate, a circular plate slidingly connected to the mounting box, a first L-shaped plate fixedly connected to the sidewall of the circular plate, a second L-shaped plate fixedly connected to the side of the first L-shaped plate away from the connecting pipe, and a switching block fixedly connected to the side of the mounting plate close to the circular plate.The petroleum conveying pipeline backwashing valve is used for switching and cleaning the working area and the cleaning area of the filter plate, and the water inlet and the water outlet do not need to be closed and opened for multiple times, so that the metal fatigue and the water hammer effect generated in the process of closing and opening the water inlet and the water outlet for multiple times are avoided.

The utility model discloses a stranding machine for cable production, and belongs to the technical field of cable production, the stranding machine comprises a housing, a first furling disc, a second furling disc, a third furling disc and a stranding cylinder, the housing is internally provided with an accommodating cavity, the accommodating cavity forms two through ports on the housing, and the first furling disc, the second furling disc, the third furling disc and the stranding cylinder are arranged in the housing. The first furling disc, the second furling disc, the third furling disc and the wire twisting barrel are sequentially arranged in the containing cavity in sequence, and a cable core of a cable sequentially penetrates through the first furling disc, the second furling disc, the third furling disc and the wire twisting barrel and is respectively located at a first furling position, a second furling position, a third furling position and a fourth furling position. Compared with the prior art, the cable folding device has the advantages that through the formed first folding position, the second folding position, the third folding position and the fourth folding position, gradual folding in the cable twisting process is achieved, and folding of each stage can bear the deformation stretching amount of part of cable cores; therefore, the peak stress is reduced, and the problems of wire core surface scratch and metal fatigue are effectively avoided.