Multi-layer co-extrusion composite pipe

Abstract

The utility model relates to the technical field of composite pipes, in particular to a multi-layer co-extrusion composite pipe which comprises an inner structure layer, the inner structure layer comprises a stretch-proof layer, a mounting groove is formed in the stretch-proof layer, a plurality of length stretching belts are fixedly connected between the inner walls of the mounting groove, and the length stretching belts are arranged in the mounting groove. The length stretching belts are uniformly distributed in the mounting groove, a plurality of expansion stretching belts are arranged in the mounting groove, the expansion stretching belts are uniformly distributed in the mounting groove, and the length stretching belts and the expansion stretching belts are distributed in a mutually crossed manner; the outer surface of the stretch-proof layer is fixedly connected with a blocking layer, the outer surface of the inner structure layer is provided with a middle structure layer, the middle structure layer comprises a compression-resistant layer, and the outer surface of the blocking layer is fixedly connected with a compression-resistant layer. The stretch-proof control cable is reasonable in structure and has a better stretch-proof effect.

Description

Technical Field

[0001] The utility model relates to the field of composite pipes, in particular to a multi-layer co-extruded composite pipe. Background Art

[0002] Pipes are widely used in many industries, and their performance is crucial. Traditional single-layer pipes have limitations in mechanical properties, chemical stability, and barrier properties. Early composite pipes also have process defects and poor performance balance. The market demand for high-performance and environmentally friendly pipes is increasing, and multi-layer co-extruded composite pipes have come into being.

[0003] Existing pipes usually do not have good ductility when in use. For example, when transporting oil and gas, the oil and gas will generate pressure when transported in the pipeline. Especially in cases of pressure changes, pipe bending, complex laying terrain, etc., the pipe will be subjected to tensile force, which can easily cause the pipe to break, resulting in oil and gas leakage and pollution accidents. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a multi-layer co-extruded composite pipe.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a multi-layer co-extruded composite tube, comprising an inner structural layer, the inner structural layer comprising a stretch-resistant layer, an installation groove being opened inside the stretch-resistant layer, a length stretching belt being fixedly connected between the inner walls of the installation groove, the number of the length stretching belts being multiple, and the length stretching belts being evenly distributed inside the installation groove, an expansion stretching belt being arranged inside the installation groove, the number of the expansion stretching belts being multiple, and the expansion stretching belts being evenly distributed inside the installation groove, the length stretching belts and the expansion stretching belts being cross-distributed with each other, and a barrier layer being fixedly connected to the outer surface of the stretch-resistant layer.

[0006] As a further description of the above technical solution:

[0007] An intermediate structural layer is provided on the outer surface of the inner structural layer, and the intermediate structural layer includes a pressure-resistant layer.

[0008] As a further description of the above technical solution:

[0009] The outer surface of the barrier layer is fixedly connected with a pressure-resistant layer, and the interior of the pressure-resistant layer is provided with a plurality of pressure-resistant grooves.

[0010] As a further description of the above technical solution:

[0011] The outer surface of the pressure-resistant layer is fixedly connected with an antistatic layer, and the interior of the antistatic layer is provided with grooves, and the number of the grooves is multiple.

[0012] As a further description of the above technical solution:

[0013] An outer structural layer is provided on the outer surface of the intermediate structural layer, and the outer structural layer includes an explosion-proof layer.

[0014] As a further description of the above technical solution:

[0015] The outer surface of the antistatic layer is fixedly connected to an explosion-proof layer, and the outer surface of the explosion-proof layer is fixedly connected to a fireproof layer.

[0016] The utility model has the following beneficial effects:

[0017] Compared with the existing technology, this multi-layer co-extruded composite pipe has a stretch-resistant layer, an expansion stretching belt and a length stretching belt. The expansion stretching belt can make the stretch-resistant layer have a certain outward expansion deformation, and the length stretching belt makes the stretch-resistant layer have a certain length stretching. The combination of the expansion stretching belt and the length stretching belt makes the stretch-resistant layer have better stretching resistance, thereby making the composite pipe have better stretch resistance. Compared with existing pipes, this multi-layer co-extruded composite pipe has better stretching resistance.

[0018] Compared with the prior art, the multi-layer co-extruded composite tube has an antistatic layer and grooves, and the multiple grooves enable the antistatic layer to form a mesh structure, thereby reducing material consumption without affecting the conductive performance of the antistatic layer.

[0019] Compared with the prior art, the multi-layer co-extruded composite pipe has a pressure-resistant layer and a pressure-resistant groove, and the cross-sectional shape of the pressure-resistant groove is triangular, so that the pressure-resistant layer can have stronger pressure resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a multi-layer co-extruded composite tube proposed by the present invention;

[0021] Figure 2 This is a cross-sectional view of the overall structure of a multi-layer co-extruded composite tube proposed by the present invention;

[0022] Figure 3 A multi-layer co-extruded composite pipe proposed by the utility model Figure 2 A magnified view of the structure at point A;

[0023] Figure 4 This is a cross-sectional view from another perspective of the overall structure of a multi-layer co-extruded composite tube proposed by the present invention;

[0024] Figure 5 A multi-layer co-extruded composite pipe proposed by the utility model Figure 4 A magnified view of the structure at point B.

[0025] Legend:

[0026] 1. Inner structural layer; 11. Stretch-resistant layer; 12. Installation groove; 13. Expansion stretch belt; 14. Length stretch belt; 15. Barrier layer; 2. Intermediate structural layer; 21. Pressure-resistant layer; 22. Pressure-resistant groove; 23. Anti-static layer; 24. Groove; 3. Outer structural layer; 31. Explosion-proof layer; 32. Fireproof layer. DETAILED DESCRIPTION

[0027] The present invention is further described below with reference to the accompanying drawings and specific embodiments to facilitate understanding of the present invention. The methods used in the present invention are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.

[0028] Reference Figure 1-5 The present invention provides a multi-layer co-extruded composite pipe, comprising an inner structural layer 1, comprising a stretch-resistant layer 11 made of polyethylene. A mounting groove 12 is defined within the stretch-resistant layer 11, wherein a plurality of stretching bands 14 are fixedly connected to the inner walls of the mounting groove 12 and are evenly distributed within the mounting groove 12. Furthermore, a plurality of expansion stretching bands 13 are disposed within the mounting groove 12 and are evenly distributed within the mounting groove 12. The expansion stretching bands 13 are intersectingly distributed with the expansion stretching bands 13. The expansion stretching bands 13 can impart a certain amount of outward expansion deformation to the stretch-resistant layer 11, while the length stretching bands 14 impart a certain amount of length stretch to the stretch-resistant layer 11. The combination of the expansion stretching bands 13 and the length stretching bands 14 provides the stretch-resistant layer 11 with a better stretch resistance. Furthermore, a barrier layer 15 is fixedly connected to the outer surface of the stretch-resistant layer 11.

[0029] The outer surface of the inner structural layer 1 is provided with an intermediate structural layer 2, which includes a pressure-resistant layer 21. The pressure-resistant layer 21 is made of polypropylene and can withstand a certain amount of pressure and external impact to ensure the structural integrity of the pipe during the oil and gas transportation process. The outer surface of the barrier layer 15 is fixedly connected to the pressure-resistant layer 21. The pressure-resistant layer 21 has a plurality of pressure-resistant grooves 22 formed therein. The cross-sectional shape of the pressure-resistant grooves 22 is triangular, which can make the pressure-resistant layer 21 have a stronger pressure resistance. The outer surface of the pressure-resistant layer 21 is fixedly connected to an anti-static layer 23. The anti-static layer 23 is made of polyimide and has a plurality of grooves 24 formed therein. The plurality of grooves 24 form a mesh structure for the anti-static layer 23, which reduces the material consumption without affecting the conductive performance of the anti-static layer 23.

[0030] The outer surface of the intermediate structural layer 2 is provided with an outer structural layer 3, which includes an explosion-proof layer 31. The explosion-proof layer 31 is made of aluminum foil, which can restrain the explosive energy and prevent the pipeline from rupturing and causing more serious consequences. The outer surface of the antistatic layer 23 is fixedly connected to the explosion-proof layer 31. The outer surface of the explosion-proof layer 31 is fixedly connected to the fireproof layer 32. The fireproof layer 32 is made of magnesium hydroxide, which absorbs a large amount of heat when heated and decomposes to produce metal oxides and water. The water produced by the decomposition absorbs heat, and the water vapor produced can dilute the oxygen concentration in the combustion area, thereby providing a flame retardant effect.

[0031] Working principle:

[0032] The expansion stretching tape can make the stretch-resistant layer have a certain outward expansion deformation, and the length stretching tape makes the stretch-resistant layer have a certain length stretching. The combination of the expansion stretching tape and the length stretching tape makes the stretch-resistant layer have better stretch resistance, thereby making the composite pipe have better stretch resistance.

[0033] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] However, the above description is merely a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A multi-layer co-extruded composite pipe, comprising an inner structural layer (1), characterized in that: The inner structural layer (1) comprises a stretch-resistant layer (11), a mounting groove (12) is provided inside the stretch-resistant layer (11), a length stretching belt (14) is fixedly connected between the inner walls of the mounting groove (12), the number of the length stretching belts (14) is multiple, and the length stretching belts (14) are evenly distributed inside the mounting groove (12), an expansion stretching belt (13) is provided inside the mounting groove (12), the number of the expansion stretching belts (13) is multiple, and the expansion stretching belts (13) are evenly distributed inside the mounting groove (12), the length stretching belts (14) and the expansion stretching belts (13) are cross-distributed with each other, and a barrier layer (15) is fixedly connected to the outer surface of the stretch-resistant layer (11).

2. The multi-layer co-extruded composite pipe according to claim 1, characterized in that: An intermediate structural layer (2) is provided on the outer surface of the inner structural layer (1), and the intermediate structural layer (2) includes a pressure-resistant layer (21).

3. The multi-layer co-extruded composite pipe according to claim 2, characterized in that: The outer surface of the barrier layer (15) is fixedly connected to the pressure-resistant layer (21), and the interior of the pressure-resistant layer (21) is provided with pressure-resistant grooves (22), and the number of the pressure-resistant grooves (22) is multiple.

4. The multi-layer co-extruded composite pipe according to claim 3, characterized in that: The outer surface of the pressure-resistant layer (21) is fixedly connected with an antistatic layer (23), and the interior of the antistatic layer (23) is provided with grooves (24), and the number of the grooves (24) is multiple.

5. The multi-layer co-extruded composite pipe according to claim 4, characterized in that: An outer structural layer (3) is provided on the outer surface of the intermediate structural layer (2), and the outer structural layer (3) includes an explosion-proof layer (31).

6. The multi-layer co-extruded composite pipe according to claim 5, characterized in that: The outer surface of the antistatic layer (23) is fixedly connected to an explosion-proof layer (31), and the outer surface of the explosion-proof layer (31) is fixedly connected to a fireproof layer (32).

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