Composite steel reinforced coilable plastic continuous pipe

Abstract

The utility model discloses a composite steel reinforced coiled plastic continuous pipe which comprises a medium transmission layer, a polyester composite layer is arranged on the outer layer of the medium transmission layer, a steel wire reinforced layer is arranged on the outer layer of the polyester composite layer, and a protective layer is arranged on the outer layer of the steel wire reinforced layer. According to the continuous pipe, the terylene isolation layer is added between the medium transmission layer and the steel reinforcement layer for composite reinforcement, a prepreg tape surface heating and circumferential compression roller device is added, the temperature resistance and strength of the medium transmission layer are improved, the interlayer welding and compact strength are improved, and the problems that the inner pipe is softened, deformed, expanded and embedded into the reinforcement layer, so that the winding angle is changed, the structure is damaged and the service life is prolonged are solved. The coiled tubing has the advantages of being high in ring stiffness, good in rigidity, capable of being coiled, resistant to corrosion, resistant to external pressure, resistant to bending, resistant to torsion, resistant to stretching, resistant to compression and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of tubular products, more exactly, a kind of composite steel reinforced coiled plastic continuous pipe. BACKGROUND

[0002] The steel reinforced coiled plastic continuous pipe has the mechanical properties of traditional rigid pipe and the convenience of flexible pipe, can be coiled, and is convenient for transportation and storage;It has less number of joints, low risk of leakage, is particularly suitable for long-distance laying, and is fast to install;It is corrosion-resistant, high-pressure-resistant, has smooth inner wall, small frictional resistance, effectively reduces energy consumption of conveying, and is widely used in conveying of multiphase fluid, gaseous hydrocarbon, liquid hydrocarbon, oilfield chemicals and non-drinking water.

[0003] The conventional steel reinforced coiled plastic continuous pipe uses steel wire and steel cord material as the reinforcing layer, and the medium transmission layer uses polyethylene material, and the temperature resistance is generally not greater than 65 DEG C. Influenced by medium temperature and internal pressure, the medium transmission layer (inner tube) is easy to soften and deform, and is embedded in the reinforcing layer, causing the winding angle to change, and the structure to be damaged. At the same time, the adhesion between the layers is poor, and the continuous pipe is easy to separate, which affects the pressure-bearing capacity of the continuous pipe, and even causes the continuous pipe to fail due to bursting. SUMMARY

[0004] Therefore, it is necessary to provide a composite steel reinforced coiled plastic continuous pipe to solve the above technical problems.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A composite steel reinforced coiled plastic continuous pipe, characterized in that the composite steel reinforced coiled plastic continuous pipe comprises a medium transmission layer, an outer layer of the medium transmission layer is provided with a polyester composite layer, an outer layer of the polyester composite layer is provided with a steel wire reinforcing layer, and an outer layer of the steel wire reinforcing layer is provided with a protective layer.

[0007] As a preferred embodiment of the utility model, the medium transmission layer is made of polyethylene or heat-resistant polyethylene.

[0008] As a preferred embodiment of the utility model, the number of layers of the polyester composite layer is 2, and the polyester composite layer is formed by winding left and right pre-impregnated tapes.

[0009] As a preferred embodiment of the utility model, the pre-impregnated tape is made of polyester industrial filament, and the winding angle of the pre-impregnated tape is 45 DEG to 60 DEG.

[0010] As a preferred embodiment of the utility model, the number of layers of the steel wire reinforcing layer is even.

[0011] As a preferred embodiment of the utility model, the steel wire reinforcing layer is made of steel wire pre-impregnated tape,

[0012] In a preferred embodiment of this utility model, the protective layer is made of polyethylene.

[0013] In a preferred embodiment of this utility model, the thickness of the protective layer is 2.0 mm to 4.0 mm.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model provides a composite steel-reinforced coilable plastic continuous pipe. The continuous pipe adds a polyester isolation layer for composite reinforcement between the medium transmission layer and the steel reinforcement layer, and adds a prepreg tape surface heating and circumferential pressure roller device to improve the temperature resistance and strength of the medium transmission layer, enhance the interlayer welding and compaction strength, and solve the problem of the inner tube softening and deforming and expanding into the reinforcement layer, causing changes in the winding angle, structural damage, and leading to the continuous pipe bursting failure. It has the advantages of high ring stiffness, good rigidity, coilability, corrosion resistance, external pressure resistance, bending resistance, torsion resistance, tensile resistance, and compression resistance. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the composite steel-reinforced coilable plastic continuous tube of this utility model;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of section I of the composite steel-reinforced coilable plastic continuous tube;

[0019] The markings in the diagram are explained as follows: 1. Medium transport layer; 2. Polyester composite layer; 3. Steel wire reinforcement layer; 4. Protective layer. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] like Figure 1 and Figure 2 As shown, the composite steel-reinforced coilable plastic continuous pipe includes a medium transmission layer 1, an outer layer of polyester composite layer 2, an outer layer of steel wire reinforcement layer 3, and an outer layer of protective layer 4.

[0022] It should be noted that the medium transmission layer 1 is made of polyethylene or heat-resistant polyethylene, and can be single-layer or multi-layer co-extruded according to the working conditions.

[0023] The number of layers of the polyester composite layer 2 is 2, and the polyester composite layer 2 is formed by winding polyester prepreg tapes left and right. The polyester prepreg tape is made of polyester industrial filament, and the winding angle of the polyester prepreg tape is 45°-60°. Further, the polyester prepreg tape is made of a material band formed by mutually parallel continuous stranded twisted polyester ropes after being impregnated with molten modified polyethylene resin.

[0024] The number of layers of the steel wire reinforcing layer 3 is even. The steel wire reinforcing layer 3 is made of steel wire prepreg tape, and the steel wire prepreg tape is made of a material band formed by mutually parallel steel wires (steel cords, steel ropes) after being impregnated with molten modified polyethylene resin.

[0025] The protective layer 4 is made of polyethylene. The thickness of the protective layer 4 is 2.0mm-4.0mm, which plays a role of protecting the reinforcing layer.

[0026] The manufacturing method of the composite steel-reinforced coiled plastic continuous pipe will be described below.

[0027] Step S1, preparing the medium transmission layer 1. The inner diameter of the composite pipe is 50mm, the design pressure is 20MPa, and the medium transmission layer 1 is high-density polyethylene PE5003D-B produced by Shanghai Petrochemical Co., Ltd.

[0028] Step S2, preparing the polyester composite layer 2. The material of the polyester composite layer 2 is polyester industrial filament, the linear density is 6000dtex, and 4-stranded twisted ropes are prepared, and then the polyester prepreg tape with a width of 62.5mm and a thickness of 1.7mm is prepared by an extrusion banding device. The polyester composite layer 2 is two layers, which are wound left and right on the medium transmission layer 1 by a winding device, and the winding angle is 50°. Before winding, a hot air gun is used to heat the inner surface of the polyester prepreg tape and the outer surface of the medium transmission layer or the already wound tape. After winding the polyester composite layer 2, a circumferential pressure roller device is used to roll the surface of the polyester composite layer with constant pressure, so as to increase the interlayer fusion and compactness.

[0029] Step S3, preparing the steel wire reinforcing layer 3. The material of the steel wire reinforcing layer 3 is steel cord, and the diameter of the steel cord is 1.39mm. Then, a steel wire prepreg tape with a width of 60.5mm and a thickness of 1.6mm is prepared by an extrusion banding device. The steel wire reinforcing layer 2 is four layers, which are wound left and right on the polyester composite layer by a winding device, and the winding angle is 55°. Before winding, a hot air gun is used to heat the inner surface of the steel wire prepreg tape and the outer surface of the wound tape. During the winding process of the steel wire reinforcing layer 3, a carbon medium wave heating facility is used to heat the steel wire reinforcing layer 3, so as to increase the interlayer adhesion. Then, a circumferential pressure roller device is used to roll the surface of the wound steel wire reinforcing layer with constant pressure, so as to increase the interlayer fusion and compactness.

[0030] Step S4, a protective layer 4 is prepared, the material is high-density polyethylene PE5003D-B of Shanghai Petrochemical, and the protective layer is extruded outside the reinforcing layer, and the thickness of the layer is 3.0 mm.

[0031] The composite steel-reinforced coiled plastic continuous pipe has the following advantages:

[0032] 1. The polyester composite layer is added, the surface of the medium transmission layer is softened and deformed and is embedded in the reinforcing layer due to the influence of the medium temperature and pressure, thereby causing the continuous pipe to burst and fail;

[0033] 2. The continuous pipe is heated and surface-rolled between layers, the bonding strength of the continuous pipe is improved, and the temperature resistance of the continuous pipe is improved to a certain extent;

[0034] 3. The continuous pipe is effectively bonded between layers, the inner and outer layers are melted into one, the slippage between layers is overcome, and the anti-slippage ability of the buckling joint is effectively improved;

[0035] 4. The continuous pipe is effectively bonded between layers, the ring stiffness of the continuous pipe is improved, and the bending resistance, torsion resistance, tensile resistance and external concentrated load resistance of the continuous pipe are improved, the requirements for winding and unwinding are reduced, and the number of repeated uses of the continuous pipe is increased.

[0036] Obviously, the above-described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application.

Claims

1. A composite steel reinforced spoolable plastic continuous pipe, characterized by, The composite steel reinforced coiled plastic continuous pipe comprises a medium transmission layer (1), an outer layer of the medium transmission layer (1) is provided with a polyester composite layer (2), an outer layer of the polyester composite layer (2) is provided with a steel wire reinforced layer (3), and an outer layer of the steel wire reinforced layer (3) is provided with a protective layer (4).

2. The composite steel reinforced spoolable plastic continuous tube of claim 1, wherein, The medium transmission layer (1) is made of polyethylene or heat-resistant polyethylene.

3. The composite steel reinforced spoolable plastic continuous tube of claim 1, wherein, The number of layers of the polyester composite layer (2) is 2, and the polyester composite layer (2) is formed by winding polyester prepreg tapes on the left and right.

4. The composite steel reinforced spoolable plastic continuous tube of claim 3, wherein, The polyester prepreg tape is made of polyester industrial filament, and the winding angle of the polyester prepreg tape is 45-60 degrees.

5. The composite steel reinforced spoolable plastic continuous tube of claim 1, wherein, The number of layers of the steel wire reinforced layer (3) is even.

6. The composite steel reinforced spoolable plastic continuous tube of claim 1, wherein, The steel wire reinforced layer (3) is made of steel wire prepreg tape.

7. The composite steel reinforced spoolable plastic continuous tube of claim 1, wherein, The protective layer (4) is made of polyethylene.

8. The composite steel reinforced spoolable plastic continuous tube of claim 7, wherein, The thickness of the protective layer (4) is 2.0-4.0 mm.

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