Composite pipe

A technology of composite pipes and pipes, which is applied in the field of pipes, can solve problems such as installation difficulties, and achieve the effects of improved ring rigidity, easy coiling, and convenient installation

Inactive Publication Date: 2019-07-02
李芳凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent combines the advantages of rigid pipes and flexible pipes. Using the combined effect of rigid and flexible pipes, the ring stiffness is high, but this kind of pipe contains rigid pipes, which is also difficult to install.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 10

[0063] A composite pipe, the composite pipe includes a reinforcing material layer and an outer protective layer, the inner diameter of the composite pipe is 250mm, the thickness of the inner lining layer is 15mm, and the thickness of the reinforcing material layer is 15mm. The reinforcement layer contains fiber-reinforced prepreg, and inside the reinforcement layer there is an outer protective layer made of polyether ketone ketone. The fiber-reinforced prepreg contains 5 parts by weight of epoxy resin and 5 parts by weight of reinforcement material, and the reinforcement material contains 10wt% glass fiber, 10wt% aramid fiber and 80wt% polyethylene fiber.

[0064] The method for manufacturing above-mentioned composite pipe comprises the steps:

[0065] The outer protective layer polyether ketone ketone is wrapped on the fiber fabric thermoplastic prepreg tape.

[0066] Coil the composite pipe and lay it on the pavement surface such as the seabed, mountains or deserts, bend th...

Embodiment 11

[0068] A composite pipe, the composite pipe includes a reinforcing material layer, the inner diameter of the composite pipe is 200mm, and the thickness of the reinforcing material layer is 15mm. The reinforcement layer contains fiber reinforced prepreg. The fiber-reinforced prepreg contains 3 parts by weight of epoxy resin and 7 parts by weight of reinforcement material, and the reinforcement material contains 10wt% glass fiber, 20wt% aramid fiber and 70wt% polyethylene fiber.

[0069] The method for manufacturing above-mentioned composite pipe comprises the steps:

[0070] Using a winding machine, the fiber-reinforced prepreg is hoop-wound on a mandrel.

[0071] Coil the composite pipe and lay it on the pavement surface such as the seabed, mountains or deserts, bend the pipe around all obstacle terrains; connect the joints of the composite pipe and fix the position; Flowing water solidifies the fiber reinforced prepreg. After testing, the ring stiffness is 1790kN / m.

Embodiment 12

[0073] A composite pipe, the composite pipe includes a reinforcing material layer, the inner diameter of the composite pipe is 25mm, and the thickness of the reinforcing material layer is 5mm. The reinforcement layer contains fiber reinforced prepreg. The fiber-reinforced prepreg contains 4 parts by weight of epoxy resin and 6 parts by weight of reinforcement material, and the reinforcement material contains 55wt% glass fiber and 45wt% polyethylene fiber.

[0074] The method for manufacturing above-mentioned composite pipe comprises the steps:

[0075] Using a winding machine, the fiber-reinforced prepreg is hoop-wound on a mandrel.

[0076] Coil the composite pipe and lay it on the pavement surface such as the seabed, mountains or deserts, bend the pipe around all obstacle terrains; connect the joints of the composite pipe and fix the position; Flowing water solidifies the fiber reinforced prepreg. After testing, the ring stiffness is 759kN / m.

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Abstract

The invention relates to a composite pipe comprising a reinforcing material layer. The thickness of the reinforcing material layer is 0.15 mm to 20 mm, the pipe inner diameter is 20 mm to 250 mm, thereinforcing material layer comprises fiber-reinforced prepreg, the fiber-reinforced prepreg comprises, by weight, 3-5 parts of resin and 5-7 parts of a reinforcing material; and except for the above-mentioned reinforcing material layer, the composite pipe can be further provided with an inner liner layer and an outer protective layer, the fiber-reinforced prepreg in the composite pipe is not curedbefore installation, running water at the temperature higher than or equal to 20 DEG C is led into the composite pipe during installation, or / and an infrared heater with the wavelength being 0.75 nmto 106 nm is used for heating, or / and a microwave generator is used for emitting microwaves being 900 MHz to 2450 MHz, and the fiber-reinforced prepreg can cure through the above methods. The composite pipe can be widely applied to the oil and gas pipeline industry, the ring rigidity of the composite pipe is good, and the characteristic of being easy to reel enables the composite pipe to be installed more conveniently.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to a composite pipe and its manufacturing and installation method. Background technique [0002] The flexible composite pipe has the advantages of fewer joints, convenient laying, fast and reliable connection, saving construction manpower and installation period, etc., and has been widely used in the oil and gas pipeline industry, especially the demanding submarine oil and gas pipeline. Although the flexible composite pipe is easy to install, it is generally desired that the pipe has a certain rigidity during use, which can withstand internal and external high pressure, and will not cause failure behaviors such as crushing and buckling. [0003] The existing technology is either a rigid pipe before laying, which is supplied in the form of a straight pipe, each length is between 6-12m, and there are many installation joints, and the reliability is low; or it is a flexible pipe before i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/128B29C53/56
CPCB29C53/56F16L9/128
Inventor 李芳凯
Owner 李芳凯
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