Double-limitation connecting system for marine fiber reinforced composite pipe

A fiber-reinforced composite and connection system technology, which is applied in the field of double-limited connection systems for marine fiber-reinforced composite pipes, can solve problems such as low reliability and pipeline connection failure, and achieves improved reliability, reduced pre-pressure loss, and good application effects. Effect

Active Publication Date: 2017-12-15
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]The technical problem to be solved by the present invention is that the traditional mechanical compression joints are only fixed by clamping force, and the reliability is low. Once the pre-pressure is lost, the pipeline is easy to be pulled directly A double-restriction connection system suitable for marine fiber-reinforced composite pipes is proposed

Method used

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  • Double-limitation connecting system for marine fiber reinforced composite pipe
  • Double-limitation connecting system for marine fiber reinforced composite pipe
  • Double-limitation connecting system for marine fiber reinforced composite pipe

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1, this scheme is mainly aimed at fiber-reinforced thermoplastic composite pipes, refer to figure 1 , the main body of the composite pipe includes a fiber-wound reinforcement layer 12 in the middle of the pipe, a matrix outer protective layer 13 adhered to the outside of the reinforcement layer, and a matrix inner liner 11 adhered to the inside of the reinforcement layer; the material of the reinforcement layer 12 is capable of secondary processing The reinforcing fiber tape (glass fiber or carbon fiber) and thermoplastic matrix material (HDPE, PEEK, PEAK), the winding fiber of the reinforcing layer is wound symmetrically at the same positive and negative angles with the fiber reinforced tape prepreg tape (the angle is the winding direction of the fiber tape and the pipe Angle in the axial direction).

[0034] A new connection system for marine fiber-reinforced composite pipes, reference figure 1 , figure 2 , including the thickened pipe part 2 and the connec...

Embodiment 2

[0048] The difference between embodiment 2 and embodiment 1 is that the snap ring is only designed in the form of the second outer ring 7, and the anti-bending device is omitted. Refer to Figure 5-Figure 7 , the outer surface profile of the second outer ring 7 includes a front tapered portion 71 and a rear cylindrical portion 72, such as Figure 7 As shown, its inner surface profile is a three-section type, including a front section 73, a middle section 74, and a rear section 75. The inner diameters of the front section 73 and the rear section 75 remain unchanged, and are respectively in line with the first thickened layer 21 and the second thickened layer 22. The pipe sections match, the middle section 74 matches the outer contour of the second tapered transition section 24 so as to be closely connected, and the inner wall of the rear section 75 is provided with an ANSI standard internal thread that cooperates with the locking ring 4; the second outer sleeve The inner diamet...

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Abstract

The invention discloses a double-limitation connecting system for a marine fiber reinforced composite pipe. The double-limitation connecting system comprises a thickened pipe portion and a connecting portion; the thickened pipe portion is bonded with the composite pipe and comprises a first thickened layer and a second thickened layer arranged on the outer side of the back half section of the first thickened layer, and the composite pipe, the first thickened layer and the second thickened layer are in transition connection with one another through conical surfaces; the connecting portion comprises a clamping part, an inner spindle and a locking ring, the clamping part is arranged on the outer side of the thickened pipe portion, and a front-end plug of the inner spindle is inserted into the composite pipe and generates initial interference; the conical surface of the second thickened layer is matched with the conical surface of the corresponding portion of the clamping part, the thickened pipe portion is subjected to the axial geometric limitation and the friction force action generated on the contact surface under the action of external force, and then double limitation of clamping locking and mechanical clamping of the connecting portion on a pipeline and the thickened pipe portion is achieved; meanwhile, the two thickened layers effectively share the pipe body stress, and therefore the bearing capacity of the connecting system is significantly improved. The connecting system is high in structural strength and good in bearing performance and can be applied to deep-sea, high-temperature and complex using environments.

Description

technical field [0001] The invention relates to the technical field of marine fiber-reinforced composite pipe equipment, in particular to a double-restricted connection system for marine fiber-reinforced composite pipes used in high-pressure oil or water transportation. Background technique [0002] The offshore oil and gas industry is facing deeper waters and harsher transportation and installation environments. However, traditional steel pipelines are becoming more and more difficult to meet the needs of offshore oil and gas transportation due to their high density, high transportation and installation costs. In order to adapt to the new According to oil and gas transportation requirements, a variety of new marine pipelines have emerged one after another. Among them, marine flexible pipes, as a new type of pipeline with strong adaptability, high flexibility and light weight, can be applied to various pipelines and marine environments. [0003] Among the flexible pipes, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L23/024F16L21/08
CPCF16L21/08F16L23/024
Inventor 王树青陈天舒姚潞房石张常友季树彬
Owner OCEAN UNIV OF CHINA
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