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Ductile iron pipes for jacking construction

A ductile iron pipe and jacking technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problem of improving the productivity and cost of ductile iron pipe jacking, limiting the use of socket-type ductile iron pipe jacking, Ribs and flanges are not easy to be automatically welded, so as to reduce the welding area, reduce production costs and save material costs

Active Publication Date: 2019-02-01
XINXING DUCTILE IRON PIPES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor weldability of ductile iron and the difficulty of automatic welding of ribs and flanges, the productivity and cost of ductile iron pipe jacking have been improved, and the use of socket-type ductile iron pipe jacking has been limited.

Method used

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  • Ductile iron pipes for jacking construction
  • Ductile iron pipes for jacking construction
  • Ductile iron pipes for jacking construction

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] Such as figure 1 As shown, the ductile iron pipe used for jacking construction in the present invention includes a ductile iron pipe body 11, one end of the ductile iron pipe body 11 is a socket 111, and the other end is a socket 112, and the outer wall of the end of the ductile iron pipe body 11 close to the socket 112 Fixed with backstop ring 12 and push mechanism 13, such as figure 2 , 3 As shown, the pushing mechanism 13 includes a cylinder body 131 and a pushing flange 132, and the pushing flange 132, cylinder body 131, and backstop ring 12 are sequentially arranged from the outside to the inside, and the cylinder body 131 and the backstop ring 12 are closely attached.

[0018] The pushing mechanism 13 also includes at least three ribs 133. The cylinder 131 and the pushing flange 132 constituting the pushing mechanism 13 can be split. On the body 11, the two halves of the cylinder are butt welded to each other, and then welded together with the push flange 132. ...

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Abstract

A nodular cast iron pipe for jacking construction comprises a nodular cast iron pipe body. A bellmouth and a spigot are arranged at one end and the other end of the nodular cast iron pipe body respectively, a retaining ring and a jacking mechanism are fixed on the outer wall of one end, close to the spigot, of the nodular cast iron pipe body, the jacking mechanism comprises a barrel and a jacking flange, the jacking flange, the barrel and the retaining ring are sequentially arranged from outside to inside, and the barrel and the retaining ring are in close fit. Production efficiency of the nodular cast iron pipe is improved greatly, production cost is lowered, and reliability is improved.

Description

technical field [0001] The invention relates to a cast pipe, in particular to a socket type nodular cast iron pipe. Background technique [0002] Socket-type ductile iron pipes have the advantages of good mechanical properties, high interface reliability, good corrosion resistance, and long service life. They are widely used in industrial sectors such as urban construction water and gas transmission. Laying requires the excavation of trenches. With the large-scale development of urban construction, people put forward higher requirements for the living environment. The laying of some pipelines needs to pass through densely populated areas, and it is not allowed to dig trenches on the ground. , railways, rivers or ground buildings, etc., it is impossible to lay trenches on the ground to lay pipelines. In order to facilitate construction, the current excavation-free pipeline jacking construction method has become the main means of urban pipeline construction. Existing ductile...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02
CPCF16L9/02
Inventor 李军申勇刘俊锋徐军谷兴海左超张涛朱盼车蕾
Owner XINXING DUCTILE IRON PIPES CO LTD
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