Middle pressure test technology and device for widebore pipeline construction

A large-diameter pipeline, pressure test technology, applied in hydraulic/pneumatic measurement, using liquid/vacuum for liquid tightness measurement, etc. Reduced installation and removal effort and hassle-free effect

Inactive Publication Date: 2007-12-26
XUZHOU INST OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this pressure test method is that the construction needs to be stopped during the pressure test, which affects the progress of the project

Method used

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  • Middle pressure test technology and device for widebore pipeline construction

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Embodiment Construction

[0019] With reference to Fig. 2, intermediate pressure test pipe of the present invention comprises steel pipe (1), the two ends of steel pipe (1) are welded integrally with transition joint (2), welds a steel clapboard (8) at the central position of steel pipe (1), Divide the steel pipe into two parts that are not connected. An H-shaped bypass pipe (6) is installed on the steel pipe, and two bypass valves (5) and two pressure gauges (4) are symmetrically installed on the bypass pipe (6). ), 2 exhaust valves (3) and a water injection pipe (9), also leave the manhole (8) of entering and leaving people on the steel pipe (1).

[0020] In this example, the first phase of the water supply project in Changzhou area was selected, the whole line is 36Km, and the DN1400 large-diameter steel cylinder prestressed concrete pipe with an effective length of 5m and a weight of 8t per section is used, referred to as PCCP pipe, so the pressure test steel pipe (1) Use 5m-long DN1400×14 steel pi...

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Abstract

The present invention is the intermediate pressure test technology and apparatus for large caliber pipeline construction. The pressure test apparatus consists of one steel pipe, steel partition board welded inside the steel pipe, H-shaped by-pass pipe, water injecting pipe mounted onto the by-pass pipe, by-pass valve, exhaust valve pressure gauge. The pressure test apparatus is connected via union with the pipeline to be pressure tested, the pipeline is injected with water to test leakage, and after test, water is exhausted and the steel partition board, by-pass pipe, etc. are eliminated. The present invention needs no interruption of the construction during pressure test and can speed engineering construction.

Description

technical field [0001] The invention belongs to the technical field of pressure testing. In particular, it relates to an intermediate pressure test technology and device for large-diameter pipeline construction. Background technique [0002] Taking Prestressed Concrete Cylinder Pipe (PCCP) as an example, the effective length of each section of the pipe is 5m, and the weight of each section is up to 8t. It is currently a large-diameter, high-pressure pipe widely used in the world. It consists of a pipe core embedded with a thin steel cylinder, prestressed steel wire wrapped around the pipe core, and a cement mortar protective layer outside the steel wire. The development and application of PCCP pipes has a history of more than half a century. At present, the output of the United States and France reaches hundreds of thousands of kilometers. Among them, the United States and Canada are the countries that promote the most prestressed steel cylinder concrete pipes in the world....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/02G01M3/02
Inventor 张宝军
Owner XUZHOU INST OF ARCHITECTURAL TECH
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