CN115051306A

CN115051306A - Cable sheath pipe and preparation method thereof

Info

Publication number: CN115051306A
Application number: CN202210639382.7A
Authority: CN
Inventors: 樊平燕; 丁昌杰; 石清云; 于惠博
Original assignee: Qingdao Zhongji Winning Composite Technology Co ltd
Current assignee: Qingdao Zhongji Winning Composite Technology Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-09-13
Anticipated expiration: 2042-06-07
Also published as: CN115051306B

Abstract

The invention discloses a cable sheath tube and a preparation method thereof. The cable sheath pipe comprises an outer functional layer, an outer continuous fiber reinforced structural layer, a hollow honeycomb structural layer, an inner continuous fiber reinforced structural layer and an inner functional layer from outside to inside in sequence. The hollow honeycomb structure layer is provided with a plurality of honeycomb holes, and the axial directions of the honeycomb holes are vertical to the axial direction of the cable sheath pipe. The cable sheath pipe provided by the invention can simultaneously have higher strength and lower weight.

Description

Cable sheath pipe and preparation method thereof

Technical Field

The invention relates to the technical field of electric power, in particular to a cable protective sleeve and a preparation method thereof.

Background

The rise of composite pipes has resulted from the composite materials providing the high strength and various functional properties of the pipes. In the field of power protective sleeves, in order to deal with the damage of external environments such as geology and the like to cables and the like, the protective sleeves need high-level strength, rigidity and functionality so as to avoid and reduce the damage of external factors to embedded cables.

Thus, the pipeline material needs to be modified to meet the requirements of the pipeline on weather resistance, flame retardance and the like. However, the existing power cable sheath pipelines are very thick and heavy due to pipeline reinforcement and rigidity increase, which affects construction.

Therefore, there is a need for a cable sheathing tube and a method of making the same that at least partially solves the above problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above problems, a first aspect of the present invention provides a cable sheathing tube, comprising:

an outer functional layer;

an outer continuous fiber reinforced structural layer located inboard of the outer functional layer;

the hollow honeycomb structure layer is positioned on the inner side of the outer continuous fiber reinforced structure layer, the hollow honeycomb structure layer is provided with a plurality of honeycomb holes, and the axial directions of the honeycomb holes are vertical to the axial direction of the cable sheath pipe;

an inner continuous fiber reinforced structural layer located inside the hollow honeycomb structural layer;

an inner functional layer located inside the inner continuous fiber reinforced structural layer.

The cable sheath pipe provided by the invention can simultaneously have higher strength and lower weight.

Optionally, both ends of the cell wall of the honeycomb cell are respectively connected to the inner continuous fiber reinforced structure layer and the outer continuous fiber reinforced structure layer by hot melting.

Optionally, the outer continuous fiber reinforced structure layer includes at least two layers of continuous fiber reinforced layers, the at least two layers of continuous fiber reinforced layers are arranged around the central axis of the cable sheath tube in a nested manner, the extending direction of the fibers in the continuous fiber reinforced layers is crossed with the axial direction of the cable sheath tube, and the extending direction of the fibers in the adjacent two layers of continuous fiber reinforced layers is crossed.

Optionally, the inner continuous fiber reinforced structure layer includes at least two layers of continuous fiber reinforced layers, the at least two layers of continuous fiber reinforced layers are arranged around the central axis of the cable sheath tube in a nested manner, the extending direction of the fibers in the continuous fiber reinforced layers is crossed with the axial direction of the cable sheath tube, and the extending direction of the fibers in the adjacent two layers of continuous fiber reinforced layers is crossed.

Optionally, the inner functional layer includes a prefabricated band, the prefabricated band surrounds the axial arrangement of the cable sheathing tube, and the extending direction of the prefabricated band intersects with the axial direction of the cable sheathing tube.

Optionally, the outer functional layer includes a prefabricated band, the prefabricated band surrounds the axial setting of cable sheathing pipe, just the extending direction of prefabricated band with the axial cross of cable sheathing pipe.

Optionally, an included angle between an extending direction of the prefabricated belt and an axial direction of the cable sheath tube is 3 to 87 °.

Optionally, an included angle between the extending direction of the fibers in the continuous fiber reinforced layer and the axial direction of the cable sheath tube is 3-87 °.

Optionally, the outer functional layer, the matrix resin in the outer continuous fiber reinforced structural layer, the hollow honeycomb structural layer, the matrix resin in the inner continuous fiber reinforced structural layer, and the inner functional layer are made of mutually soluble thermoplastic resins;

the outer functional layer, the outer continuous fiber reinforced structural layer, the hollow honeycomb structural layer, the inner continuous fiber reinforced structural layer and the inner functional layer are compounded into a whole through hot melting.

Optionally, the outer continuous fiber reinforced structural layer and the continuous fibers in the outer continuous fiber reinforced structural layer comprise at least one of glass fibers, basalt fibers, carbon fibers, aramid fibers and polyester fibers; and/or

The thermoplastic resin includes at least one of polypropylene, polyethylene, polyamide, polyketone, and polyethylene terephthalate.

The second aspect of the invention provides a preparation method of a cable sheath tube, which comprises the following steps:

extruding thermoplastic resin into a first prefabricated belt by an extruding device, winding the first prefabricated belt on the outer surface of a core mould at an angle of 3-87 degrees with the axial direction of the core mould, and performing hot melting compounding to form an inner functional layer;

hot-melting and winding a continuous fiber composite strip on the outer surface of the inner functional layer at an angle of 3-87 degrees between the fiber direction and the axial direction of the core mold to form a first continuous fiber reinforced layer;

hot-melting and winding a continuous fiber composite strip on the outer surface of the first continuous fiber reinforced layer at an angle of 3-87 degrees between the fiber orientation and the axial direction of the mandrel to form a second continuous fiber reinforced layer, wherein the extension directions of the fibers in the first continuous fiber reinforced layer and the second continuous fiber reinforced layer are crossed;

sleeving a hollow honeycomb structure layer outside the second continuous fiber reinforced layer, connecting the inner surface of the hollow honeycomb structure layer to the second continuous fiber reinforced layer in a hot melting manner, and enabling the axial direction of honeycomb holes of the hollow honeycomb structure layer to be vertical to the axial direction of the cable sheath pipe;

hot-melting and winding a continuous fiber composite strip on the outer surface of the hollow honeycomb structure layer at an angle of 3-87 degrees between the fiber direction and the axial direction of the core mold to form a third continuous fiber reinforced layer;

hot-melting a continuous fiber composite tape at an angle of 3-87 ° of fiber orientation to the axial direction of the mandrel around the outer surface of the third continuous fiber-reinforced layer to form a fourth continuous fiber-reinforced layer, and crossing the extending directions of the fibers in the third continuous fiber-reinforced layer and the fourth continuous fiber-reinforced layer;

and extruding the thermoplastic resin into a second prefabricated belt by an extruding device, winding the second prefabricated belt on the outer surface of the fourth continuous fiber reinforced layer at an angle of 3-87 degrees with the axial direction of the core mold, and performing hot melting compounding to form the outer functional layer.

The preparation method of the cable sheath tube provided by the invention has the similar technical effects as those of the cable sheath tube in the first aspect, is high in production efficiency, and is beneficial to continuous production.

Drawings

The following drawings of the present invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In the drawings:

fig. 1 is a partial perspective schematic view of a cable sheathing tube according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of a radial section of a cable sheathing tube according to a preferred embodiment of the present invention.

Description of reference numerals:

100: cable sheath 101: core mould

110: outer functional layer 111: second prefabricated belt

120: outer continuous fiber reinforced structural layer 121: third continuous fiber reinforced layer

122: fourth continuous fiber-reinforced layer 130: hollow honeycomb structure layer

131: honeycomb holes 140: inner continuous fiber reinforced structure layer

141: first continuous fiber-reinforced layer 142: second continuous fiber reinforced layer

150: inner functional layer 151: first prefabricated belt

AX: central axis a: first included angle

b: second angle c: third included angle

d: a fourth angle e: fifth angle

f: sixth angle

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the following description, a detailed description will be given in order to thoroughly understand the present invention. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. It is apparent that the implementation of the embodiments of the invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component". It is to be understood that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like are used herein for descriptive purposes and not limitation.

Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, an aspect of the present invention provides a cable sheathing tube 100, which is constructed in a multi-layered structure. Illustratively, the cable sheathing tube 100 includes, in order from the outside to the inside, an outer functional layer 110, an outer continuous fiber reinforced structural layer 120, a hollow honeycomb structural layer 130, an inner continuous fiber reinforced structural layer 140, and an inner functional layer 150.

The hollow honeycomb structure layer 130 is connected between the outer continuous fiber reinforced structure layer 120 and the inner continuous fiber reinforced structure layer 140, and has a plurality of honeycomb holes 131, and the axial direction of the honeycomb holes 131 is perpendicular to the axial direction of the cable sheathing tube 100. Wherein, the two ends of the cell wall of the honeycomb 131 are respectively connected to the inner continuous fiber reinforced structure layer 140 and the outer continuous fiber reinforced structure layer 120 by hot melting. Preferably, the hollow honeycomb layer 130 is made of thermoplastic resin so that it can be thermally fused with other structures. The hollow honeycomb structure layer 130 not only provides radial pressure resistance, but also has low density and light weight, thereby being beneficial to controlling the total weight of the cable sheathing tube 100.

The cable sheathing tube 100 according to the present invention can have both high strength and low weight.

Referring to fig. 1, the inner functional layer 150 and the outer functional layer 110 are both disposed around the axial direction of the cable sheathing tube 100, and both are preferably made of a prefabricated tape. The preform tape may be a tape made of a thermoplastic resin. The inner functional layer 150 and the outer functional layer 110 can provide functions of flame retardancy, weather resistance, protection, and the like to the cable sheathing tube 100.

Wherein, the prefabricated area is around the axial winding setting of cable sheathing pipe 100, and the extending direction of prefabricated area and the axial of cable sheathing pipe 100 are criss-cross. Preferably, the angle between the extending direction of the prefabricated tape and the axial direction of the cable sheathing tube 100 is 3 to 87 °. More preferably, the angle between the extending direction of the prefabricated tape and the axial direction of the cable sheathing tube 100 is 50 °. In other words, the angle between the extending direction of the preformed belt and the axial direction of the cable sheath tube 100 is an acute angle, and the corresponding obtuse angle is 93-177 °.

The outer and inner continuous fiber reinforced

structural layers

120, 140 each comprise at least two continuous fiber reinforced layers. Wherein the continuous fiber reinforced layer is configured as a tape or sheet compounded of a matrix resin and continuous fibers.

In a preferred embodiment, the outer functional layer 110, the matrix resin in the outer continuous fiber reinforced structural layer 120, the hollow honeycomb structural layer 130, the matrix resin in the inner continuous fiber reinforced structural layer 140 and the inner functional layer 150 are made of mutually soluble thermoplastic resins, so that the outer functional layer 110, the outer continuous fiber reinforced structural layer 120, the hollow honeycomb structural layer 130, the inner continuous fiber reinforced structural layer 140 and the inner functional layer 150 are thermally fused and compounded into a whole. More preferably, the mutually soluble thermoplastic resin may be at least one selected from the group consisting of polypropylene, polyethylene, polyamide, polyketone, and polyethylene terephthalate. Of course, other types of thermoplastic resins may be selected as long as they are compatible with each other.

Optionally, the continuous fibers in the outer continuous fiber reinforced structural layer 120 and the outer continuous fiber reinforced structural layer 120 include at least one of glass fibers, basalt fibers, carbon fibers, aramid fibers, and polyester fibers.

At least two continuous fiber reinforced layers of the inner continuous fiber reinforced structural layer 140 and the outer continuous fiber reinforced structural layer 120 are respectively arranged around the central axis AX of the cable sheathing tube 100 in a nested manner, the extending direction of the fibers in the continuous fiber reinforced layers is crossed with the axial direction of the cable sheathing tube 100, and the extending direction of the fibers in the two adjacent continuous fiber reinforced layers is crossed. Preferably, the acute angle between the extending direction of the fibers in the continuous fiber-reinforced layer and the axial direction of the cable sheathing tube 100 is 3 to 87 °. More preferably, the angle between the extending direction of the fibers in the continuous fiber-reinforced layer and the axial direction of the cable sheath tube 100 is 55 °. In other words, the extending direction of the fibers in the continuous fiber reinforced layer and the axial direction of the cable sheath tube 100 form an acute angle, and the corresponding obtuse angle is 93-177 °.

Thus, the strength of the cable sheathing tube 100 in both the axial direction and the radial direction can be improved by using the two continuous fiber reinforced layers wound in a cross manner.

Specifically, with continued reference to FIG. 1, the inner functional layer 150 includes a first preform strip 151. The first preform tape 151 is wound around the outer surface of the core mold 101 and heat-fused to form the inner functional layer 150. Wherein the first preformed band 151 forms a first angle a with the axial direction of the core mold 101. The first included angle a may be 3-87 °. Preferably, the first angle a is 50 °.

The inner continuous fiber reinforced structural layer 140 includes a first continuous fiber reinforced layer 141 and a second continuous fiber reinforced layer 142, and the extending directions of the continuous fibers in the first continuous fiber reinforced layer 141 and the second continuous fiber reinforced layer 142 are crossed.

A first continuous fiber reinforcement layer 141 is arranged around the axial direction of the cable sheathing tube 100 on the outer surface of the inner functional layer 150. And the continuous fibers in the first continuous fiber reinforced layer 141 run at a second angle b to the axial direction of the mandrel 101. The second included angle b may be 3-87 °. Preferably, the second angle b is 55 °.

A second continuous fiber-reinforced layer 142 is disposed on the outer surface of the first continuous fiber-reinforced layer 141 around the axial direction of the cable sheathing tube 100. And the continuous fibers in the second continuous fiber reinforced layer 142 run at a third angle c to the axial direction of the mandrel 101. The third angle c may be 3-87. Preferably, the third angle c is 55 °. The hollow honeycomb structure layer 130 is sleeved on the outer surface of the second continuous fiber reinforced layer 142.

The outer continuous fiber reinforced structural layer 120 includes a third continuous fiber reinforced layer 121 and a fourth continuous fiber reinforced layer 122, and the extending directions of the continuous fibers in the third continuous fiber reinforced layer 121 and the fourth continuous fiber reinforced layer 122 are crossed.

A third continuous fibrous reinforcement layer 121 is disposed on the outer surface of the hollow honeycomb layer 130 around the axial direction of the cable sheath tube 100. And the continuous fibers in the third continuous fiber reinforcement layer 121 run at a fourth angle d to the axial direction of the mandrel 101. The fourth included angle d may be 3-87 °. Preferably, the fourth angle d is 55 °.

A fourth continuous fiber reinforcement layer 122 is disposed on the outer surface of the third continuous fiber reinforcement layer 121 around the axial direction of the cable sheathing tube 100. And the continuous fibers in the fourth continuous fiber reinforcement layer 122 run at a fifth angle e to the axial direction of the mandrel 101. The fifth included angle e may be 3-87 °. Preferably, the fifth angle e is 55 °.

The outer functional layer 110 includes a second preform strip 111. The second preform tape 111 is wound around the outer surface of the fourth continuous fiber-reinforced layer 122 and is heat-fused to form the outer functional layer 110. Wherein the second preform strip 111 forms a sixth angle f with the axial direction of the core mould 101. The sixth included angle f may be 3-87 °. Preferably, the sixth angle f is 50 °.

Another aspect of the present invention further provides a method for preparing the cable sheathing tube 100.

Step 1: the thermoplastic resin is extruded into the first preform tape 151 by an extrusion apparatus. The first preform tape 151 is wound around the outer surface of the core mold 101. The first preform band 151 extends at an angle of 3-87 deg. to the axial direction of the core mould 101. Alternatively, the winding angle of the first preform tape 151 is 3 to 87 °. And then hot melt lamination to form the inner functional layer 150.

Step 2: a continuous fiber composite tape is hot-melt wound around the outer surface of the inner functional layer 150 to form a first continuous fiber reinforced layer 141. Wherein the continuous fibers of the second continuous fiber reinforced layer 142 run at an angle of 3-87 degrees to the axial direction of the mandrel 101. Alternatively, the winding angle of the continuous fiber composite tape in this step is 3 to 87 °.

And step 3: the continuous fiber composite tape is hot-melt wound on the outer surface of the first continuous fiber-reinforced layer 141 to form the second continuous fiber-reinforced layer 142. Wherein the continuous fibers of the second continuous fiber reinforced layer 142 run at an angle of 3-87 degrees to the axial direction of the mandrel 101. Alternatively, the winding angle of the continuous fiber composite tape in this step is 3 to 87 °.

And 4, step 4: the hollow honeycomb structure layer 130 is sleeved outside the second continuous fiber reinforced layer 142, the inner surface of the hollow honeycomb structure layer 130 is connected to the second continuous fiber reinforced layer 142 in a hot melting manner, and the axial direction of the honeycomb holes 131 of the hollow honeycomb structure layer 130 is perpendicular to the axial direction of the cable sheath tube 100.

And 5: the continuous fiber composite tape is hot-melt wound around the outer surface of the hollow honeycomb structural layer 130 to form a third continuous fiber reinforced layer 121. Wherein the continuous fibers of the third continuous fibrous reinforcement layer 121 run at an angle of 3-87 degrees to the axial direction of the mandrel 101. Alternatively, the winding angle of the continuous fiber composite tape in this step is 3 to 87 °.

Step 6: the continuous fiber composite tape is heat-melted and wound around the outer surface of the third continuous fiber reinforced layer 121 to form a fourth continuous fiber reinforced layer 122. Wherein the continuous fibers of the fourth continuous fibrous reinforcement layer 122 run at an angle of 3 to 87 degrees from the axial direction of the mandrel 101. Alternatively, the winding angle of the continuous fiber composite tape in this step is 3 to 87 °.

And 7: the thermoplastic resin is extruded into the second preform tape 111 by an extrusion apparatus. The second preform strip 111 is wound around the outer surface of the fourth continuous fibre reinforcement layer 122. The second preform strip 111 extends at an angle of 3-87 deg. to the axial direction of the core mould 101. Alternatively, the second preform strip 111 is wound at an angle of 3 to 87 °. And then hot melt compounded to form the outer functional layer 110.

The preparation method of the cable sheath tube 100 according to the present invention has high production efficiency, and is advantageous for continuous production.

The flows and steps described in all the preferred embodiments described above are only examples. Unless an adverse effect occurs, various processing operations may be performed in a different order from the order of the above-described flow. The above-mentioned steps of the flow can be added, combined or deleted according to the actual requirement.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and the invention is not limited to the above embodiments, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the invention as claimed.

Claims

1. A cable sheathing tube, comprising:

an outer functional layer;

an outer continuous fiber reinforced structural layer located on an inner side of the outer functional layer;

an inner functional layer located inboard of the inner continuous fiber reinforced structural layer.

2. The cable sheathing tube according to claim 1, wherein the cell walls of the honeycomb cells are heat-fused at both ends to the inner and outer continuous fiber reinforced structural layers, respectively.

3. The cable sheathing tube according to claim 1, wherein the outer continuous fiber reinforced structural layer comprises at least two continuous fiber reinforced layers, at least two of the continuous fiber reinforced layers being arranged in a nested arrangement around a central axis of the cable sheathing tube, the extending direction of the fibers in the continuous fiber reinforced layers being transverse to the axial direction of the cable sheathing tube, and the extending direction of the fibers in two adjacent continuous fiber reinforced layers being transverse to each other.

4. The cable sheathing tube according to claim 1, wherein the inner continuous fiber reinforced structural layer comprises at least two continuous fiber reinforced layers, at least two of the continuous fiber reinforced layers being arranged in a nested arrangement around a central axis of the cable sheathing tube, the direction of extension of the fibers in the continuous fiber reinforced layers being transverse to the axial direction of the cable sheathing tube, and the direction of extension of the fibers in two adjacent continuous fiber reinforced layers being transverse to each other.

5. The cable sheathing tube according to claim 1, wherein the inner functional layer comprises a preformed tape disposed around an axial direction of the cable sheathing tube, and an extending direction of the preformed tape crosses the axial direction of the cable sheathing tube.

6. The cable sheathing tube according to claim 1, wherein the outer functional layer comprises a preformed tape disposed around an axial direction of the cable sheathing tube, and an extending direction of the preformed tape crosses the axial direction of the cable sheathing tube.

7. The cable sheathing tube according to claim 5 or 6, wherein an angle between an extending direction of the preform tape and an axial direction of the cable sheathing tube is 3 to 87 °.

8. The cable sheathing tube according to claim 3 or 4, wherein the angle between the direction of extension of the fibres in the continuous fibre-reinforced layer and the axial direction of the cable sheathing tube is 3 to 87 °.

9. The cable sheathing tube according to any one of claims 1 to 6,

the outer functional layer, the matrix resin in the outer continuous fiber reinforced structural layer, the hollow honeycomb structural layer, the matrix resin in the inner continuous fiber reinforced structural layer and the inner functional layer are made of mutually soluble thermoplastic resin;

10. The cable sheathing tube according to claim 9,

the outer continuous fiber reinforced structure layer and the continuous fibers in the outer continuous fiber reinforced structure layer comprise at least one of glass fibers, basalt fibers, carbon fibers, aramid fibers and polyester fibers; and/or

11. The preparation method of the cable sheath pipe is characterized by comprising the following steps:

hot-melt winding a continuous fiber composite tape around an outer surface of the third continuous fiber-reinforced layer with a fiber orientation at an angle of 3 to 87 ° from an axial direction of the core mold to form a fourth continuous fiber-reinforced layer and intersect extension directions of fibers in the third and fourth continuous fiber-reinforced layers;