Pipe hoist sub-arm

Abstract

The invention relates to an underground pipeline of a medium and small pipe hoist machine, in particular to an auxiliary hoist arm for the maintenance and cover pavement in a large caliber pipeline or the pavement of the underground pitch of the large caliber pipeline. The invention includes a supporting arm (1) with the A-typed structure, a swing oil cylinder (2), and a supporting leg (3); the upper end of the supporting arm (1) is articulated with a hoist arm (4) of the pipe hoist machine; the lower end of the supporting arm (1) is articulated with the supporting leg (3); one end of the swing oil cylinder (2) is articulated with the hoist arm (4) while the other end is articulated with the supporting arm (1). By the swing oil cylinder (2), the supporting leg (3) arranged at the lower end of the supporting arm (1) is supported on the ground. The hoist weight is commonly supported by matching with the hoist arm (4). The invention has the capability improving the hoist weight of the medium and small pipe hoist machine by matching with the hoist arm (4), can meet the requirements of the maintenance and cover pavement operation of the large caliber long-transportation pipeline and the pavement of the large caliber pipeline, and has the advantages of good stability, simple structure, convenient application, low cost, etc.

Description

1. Technical field: [0001] The invention belongs to the field of engineering machinery, in particular to an auxiliary boom used for maintenance and covering of pipelines below the ground by a medium and small-sized pipelayer, especially for large-diameter pipelines; it can also be used for large-diameter pipelines in trenches below the ground road laying. 2. Background technology: [0002] In recent years, oil and gas pipeline transportation projects have developed rapidly, and large-diameter long-distance pipelines have been launched continuously. Since most of the long-distance pipelines are underground, their working environment is very harsh, and the anti-corrosion layer on the surface of the pipeline needs to be maintained and re-covered every once in a while. The pipeline that has been laid is hoisted again, the anti-corrosion layer on the surface of the pipeline is removed, and then covered again. However, the price of large-tonnage pipelayers is relatively high. If...

AI Technical Summary

Problems solved by technology

However, the price of large-tonnage pipelayers is relatively high. If the construction period is short, a large number of large-tonnage pipelayers will be required, which will greatly increase the equipment investment cost of the construction company; otherwise, the construction progress will be seriously affected.

Images