Sleeper prestress single-end tensioning machine head

Abstract

The invention discloses a sleeper prestress single-end tensioning machine head, and belongs to the technical field of sleeper prestress tensioning. The sleeper prestress single-end tensioning machine head comprises a shell, two parallel center-penetrating jacks are arranged at the rear end of the shell, a force sensor and a displacement sensor are arranged on each center-penetrating jack, a main pull rod penetrates through each center-penetrating jack, two nut screwing mechanisms are further arranged at the front portion of the shell, and a through straight channel is formed from a screwing head to the rear ends of the nut screwing mechanisms; the ends of the main pull rods are provided with expansion structures; and a pull rod connecting mechanism is further arranged between each nut screwing mechanism and the corresponding main pull rod and connected with a displacement mechanism with the movement direction perpendicular to the corresponding main pull rod. The sleeper prestress single-end tensioning machine head is specially designed for sleeper tensioning, two sleeper steel bars can be tensioned at the same time, use is convenient, the tensioning force value and the tensioning elongation value can be read synchronously, and the machine head is beneficial for improving the operation quality and efficiency.

Description

technical field [0001] The invention relates to a sleeper prestressed single-end tensioning machine head, which belongs to the technical field of sleeper prestressed tensioning. Background technique [0002] With the increasing development of railway system traffic, the application of prestressed concrete sleepers has increased dramatically. The sleeper is an important stress-bearing component of the track system under the load of the train. It bears various forces from the rail and elastically transmits the force to the ballast bed, which can effectively maintain the gauge, direction and position of the track. At present, most of the sleepers laid in our country are concrete sleepers. In the sleeper production process, sleeper prestress tension is an important factor affecting the quality of sleeper processing. The spiral rib steel wire of the prestressed concrete sleeper is affected by various factors during the prestressing process, and there is a phenomenon of non-unif...

AI Technical Summary

Problems solved by technology

Inaccurate control of sleeper tendon stress and prestressed tension elongation is the main cause of cracks in the prestressed structure, excessive deformation of the prestressed structure, and structural failure or scrapping

In addition, the existing tensioning equipment is more cumbersome to operate when used for sleeper tensioning, and it is inconvenient to use

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