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Large-diameter underwater water pipeline floating device and method

A large-diameter technology for water pipelines, applied in pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., can solve problems such as increased construction costs, large impact of wind and waves, and inconvenient construction, and reduce the total time , the effect of reducing the number and reducing the impact

Active Publication Date: 2019-08-13
CHINA COMM 2ND NAVIGATIONAL BUREAU 3RD ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the single-section connections of underwater HDPE pipes are all connected by stainless steel flanges, firstly, the construction cost will be increased and the construction time will be prolonged. In addition, the stainless steel flanges of the two underwater HDPE pipes will have a great impact on receiving wind and waves, making construction inconvenient and high cost

Method used

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  • Large-diameter underwater water pipeline floating device and method
  • Large-diameter underwater water pipeline floating device and method
  • Large-diameter underwater water pipeline floating device and method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and an embodiment of a power plant's underwater circulating cooling water supply pipe.

[0043] The water intake pipe of the circulating cooling water supply pipeline of a power plant is spliced ​​by HDPE pipes with an inner diameter of 2.6m. Two pipelines are set up with a total length of about 825m. The average excavation depth of the foundation trench 10 is about 7m, and the excavation width at the bottom is 11m. The excavation slope is 1:2. The length of the east line of the sea water intake is about 200m.

[0044] Such as Figure 1 to Figure 6 As shown, this embodiment includes connecting 10 HDPE pipes 1 with a standard length of 6m to form a section of water delivery pipeline with a length of 60m, and 23.3 HDPE pipes 1 to form a section of water delivery pipeline with a length of 140m. Water pipes, multiple counterweights 2 and multiple airbags 3, multiple counter...

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Abstract

The invention discloses a floating transportation device and method for major diameter underwater water pipes. The floating transportation device for the major diameter underwater water pipes comprises the water pipes with lengths being 54-60 m and 138-140 m correspondingly, multiple balancing weights, and multiple air bags; the multiple balancing weights are fixed on the water pipes at intervals,head plates are separately fixed on the end heads of two ends of one of the water pipes, the multiple air bags are arranged along the two longitudinal sides of the water pipes at intervals, and multiple beams of I-shaped steel are connected end to end and are separately fixed under two sides of the middle portions of the balancing weights arranged at intervals. The method for the major diameter underwater water pipes comprises the following steps that (1), HDPE pipes are connected in a welded mode and the balancing weights are installed; (2), the head plates are installed and a closed water test is carried out; (3), the water pipes float and the air bags are installed; (4), the water pipes are flooded with water and sink; and (5), the air bags are deflated and the water pipes are immersed. According to the floating transportation device and method for the major diameter underwater water pipes, the quantity of stainless steel flanges and the cost of the construction material are reduced greatly, total time of butt joint of water stainless steel flanges is reduced, the cost of underwater construction of the water pipes is reduced, the construction period is shortened, and construction efficiency is enhanced.

Description

technical field [0001] The invention relates to an underwater pipeline transportation and lowering device, in particular to an underwater transportation device for a large-diameter underwater water pipeline and an underwater lowering and positioning connection method, belonging to the technical field of underwater pipeline construction. Background technique [0002] Large-diameter underwater water delivery pipeline refers to a pipeline with a diameter greater than 1.5m. The pipeline is made of high-density polyethylene (hereinafter referred to as HDPE) winding. The melting point of HDPE pipe is about 130°C, and the relative density is 0.941~0.960. It has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, good mechanical strength; dielectric properties, environmental stress cracking resistance are also good, it is a new type of underwater Pipe laying materials. The length of a single HDPE pipe is 6m. During engineering use, such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L1/24F16L1/16F16L1/235
CPCF16L1/161F16L1/163F16L1/165F16L1/235F16L1/24
Inventor 刘功鑫吴开锐丁红波茅宇文国峰
Owner CHINA COMM 2ND NAVIGATIONAL BUREAU 3RD ENG
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