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Method for manufacturing pressure backfilling type pipeline

A manufacturing method and pipeline technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of high requirements and complexity of pipelines, and achieve the effect of shortening excavation time and strong applicability

Active Publication Date: 2014-11-12
SINOHYDRO BEREAU 10 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this construction method has higher requirements on the pipeline, which not only needs to match a larger pressure, but also needs to withstand more complicated stress conditions, which puts forward higher requirements for the pipeline

Method used

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  • Method for manufacturing pressure backfilling type pipeline
  • Method for manufacturing pressure backfilling type pipeline
  • Method for manufacturing pressure backfilling type pipeline

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Experimental program
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Embodiment Construction

[0029] The manufacturing method of the pressure backfill type pipeline of the present invention comprises the following steps:

[0030] Step 1: Pipe Prefabrication

[0031] Scribe the steel plate so that there is only one longitudinal weld line in a section of pipe, and the longitudinal weld lines of adjacent pipe sections should be staggered by more than 300mm.

[0032] After scribing, mark the pipe segment, segment, block number, water flow direction, horizontal and vertical center line, groove angle and cutting line and other symbols.

[0033] Cutting and beveling of the steel plate after scribing. Arc cutting is not allowed. When the thickness of the steel plate is not greater than 22mm, a single "V" groove is used. When the thickness of the steel plate is greater than or greater than 22mm, the weld bevel is symmetrical "X" ” type groove to achieve accurate positioning of the steel plate in subsequent welding;

[0034] Step 2: Winding into a Tube

[0035] The steel plat...

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Abstract

The invention discloses a method for manufacturing a pressure backfilling type pipeline. The method for manufacturing the pressure backfilling type pipeline comprises the following steps that firstly, the pipeline is prefabricated, wherein after steel plates are marked, the steel plates are cut, and chamfering is conducted; secondly, the steel plates are coiled into pipes in a cold coiling mode; thirdly, pipes and connected and welded, wherein coiled single-section pipes are placed on multiple supporting rollers on a trolley to be connected, and after preheating, the pipes are connected through electric-arc welding or union melt welding; fourthly, anticorrosion treatment is conducted, wherein anti-rust pretreatment is conducted on the surfaces of the pipes through a shot blasting method, and then anti-corrosion treatment is conducted. In this way, the method for manufacturing the pressure backfilling type pipeline can be effectively applied to flexible embedding; the pipeline is allowed to deform freely in the backfilling process, so that stress is released; in addition, the practicability is high, and the method is suitable for the environment with broken rock, a thick covering layer and uneven terrain.

Description

technical field [0001] The invention relates to the technical field of pipeline production, in particular to a production method of a pressure backfill pipeline. Background technique [0002] With the continuous improvement of people's living standards, there are more and more various infrastructures, such as power stations, etc. Although this infrastructure is for human services, in order to realize such infrastructure, it is often necessary to carry out pipeline construction. The required pipelines are used to realize the transportation and transportation of water, lines, etc., but as people gradually pay attention to the environment, they also hope that this kind of infrastructure can reduce the impact on the environment as much as possible. Moreover, in pipeline construction, due to The environment is complex, the terrain is uneven, and the height is uneven, which also puts forward higher and higher requirements for the construction of buried pipes. [0003] In order to...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00F16L9/02
Inventor 吴方明胡湛军杜学泽喻广平刘仕发王治烘王强
Owner SINOHYDRO BEREAU 10 CO LTD
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