Unlock instant, AI-driven research and patent intelligence for your innovation.

Non-excavation breaking cutter for flexible pipeline replacement

A flexible pipeline, non-excavation technology, applied in the direction of pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of difficult replacement of underground pipelines, increased maintenance costs, large fracturing tools, etc., to achieve connection design Convenient, quick and cost-saving effect

Inactive Publication Date: 2020-02-21
POWERCHINA HUADONG ENG COPORATION LTD
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to a much higher maintenance cost of underground pipelines compared to open-air pipelines
[0003] In order to overcome the difficulty of replacing underground pipelines, the method of trenchless pipeline replacement has been proposed.
Traditional non-excavation pipeline replacement is mostly used in rigid pipelines, and this type of non-excavation technology is not only an external traction device, but also a power device for the rupturing tool, which results in a relatively large fracturing tool
However, there are currently no rupturing tools specifically designed to serve flexible pipes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-excavation breaking cutter for flexible pipeline replacement
  • Non-excavation breaking cutter for flexible pipeline replacement
  • Non-excavation breaking cutter for flexible pipeline replacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Single-knife Trenchless Flexible Pipeline Replacement for Cracked Knives

[0033] Such as Figure 1-2 As shown, the single-knife non-excavation flexible pipe replacement rupture tool is composed of a tool body 1, a blade 2 and a pulling end 3. At the same time, a blade mounting slot is reserved on the tool body 1, and two blade fixing holes 11 and 12 are opened. Two steel cable fixing holes 13, 14 and a pulling end connection hole 15. Wherein, the tool body 1 has a hollow cylinder shape with a gradual cross section. The gradual cylindrical shape enables the tool to stretch the broken pipeline while breaking the original pipeline 4, so as to pull in the new pipeline. The hollow feature enables the steel cable 6 for pulling the tool to be inserted and fixed with a bolt, and also allows the trailing end of the tool to be inserted and connected with a bolt. The arrangement of the blade 2 adopts a single-knife arrangement and is a replaceable blade, which can b...

Embodiment 2

[0039] Example 2: Replacement of broken knives for double-knife trenchless flexible pipelines

[0040] Such as Figure 7-8As shown, the double-knife non-excavation flexible pipe replacement rupture tool is composed of a tool body 1, a blade 2 and a pulling end 3. At the same time, two blade mounting slots and 2 pairs of blade fixing holes are reserved on the tool body 1. Each pair of blades The fixing holes include 2 blade fixing holes 11, 12, two blade mounting grooves are arranged on both sides of the blade body 1, and the included angle is 180°; two steel cable fixing holes 13, 14 and a Trailing end connection hole 15. Wherein, the tool body has a hollow cylinder shape with a gradual cross section. The gradual cylindrical shape enables the tool to stretch the broken pipeline while breaking the original pipeline 4, so as to pull in the new pipeline. The hollow feature allows the wire cable used to pull the tool to be inserted and bolted, and also allows the trailing end o...

Embodiment 3

[0041] Example 3: Three-blade non-excavation flexible pipeline replacement for broken blades

[0042] Such as Figure 9-10 As shown, the three-knife non-excavation flexible pipeline replacement tool is composed of a tool body 1, a blade 2 and a pulling end 3. At the same time, three blade mounting slots are reserved on the tool body, and 3 pairs of blade fixing holes are fixed. The holes include two blade fixing holes 11, 12, three blade mounting grooves are evenly distributed on the blade body 1 along the circumference, and the included angle is 120°; there are also two steel cable fixing holes 13, 14 and a pulling end on the cutter body 1 Connection hole 15. Wherein, the tool body 1 has a hollow cylinder shape with a gradual cross section. The gradual cylinder shape enables the cutter to stretch the broken pipeline while breaking the original pipeline 4, so that the new pipeline 5 can be pulled in. The hollow feature allows the wire cable used to pull the tool to be inser...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a non-excavation breaking cutter for flexible pipeline replacement. A cutter main body is in a hollow cylindrical shape with gradually varied cross sections; and the cutter expands an original pipeline while breaking because of a gradually varied cylindrical shape so as to facilitate pulling-in of a new pipeline. The hollow character allows a steel cable used for drawing the cutter to be extended and fixed by a bolt, meanwhile, allows a cutter drawing end to be extended and connected by a plug pin. A cutter blade is a replaceable cutter blade; and when the cutter bladeis dulled or damaged, the cutter blade can be replaced conveniently and quickly at any time without replacing the overall cutter. The cutter blade can be arranged as a single-cutter type, a double-cutter type or a three-cutter type, which is selected according to the characteristics of diameter, material and the like of a pipeline. The drawing end is a detachable part and is connected with the cutter main body by the plug pin so as to facilitate the detachment of the drawing end; and after the drawing end is detached, the new pipeline is connected with the cutter main body by the plug pin after being screwed through screw threads, so that the new pipeline is prevented from being screwed.

Description

technical field [0001] The invention relates to the field of non-excavation technology, in particular to a non-excavation flexible pipe replacement rupture tool. Background technique [0002] After the 1980s, flexible drainage pipes have been widely used in domestic water supply and drainage pipes due to their obvious advantages such as light weight, corrosion resistance, easy installation, and low water flow resistance. In recent years, it has been found that in areas with poor geological conditions, weak strata and coastal areas, such pipelines have serious structural defects such as deformation and collapse soon after they are buried. Because the underground pipeline is buried underground for a long time, when the pipeline itself has a problem, it needs to be excavated according to the traditional method before it can be overhauled, maintained and replaced. This results in a much higher maintenance cost for underground pipelines compared to open-air pipelines. [0003] ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/028F16L1/06
CPCF16L1/028F16L1/06
Inventor 黄雷钟伟斌金诚唐睿马孝春李子明罗汉罗健邹小强潘奇
Owner POWERCHINA HUADONG ENG COPORATION LTD