A double-layer shielding protection tube and a preparation method thereof

Abstract

A double-layer shielding protective tube and a preparation method thereof. The double-layer shielding sleeve tube comprises a sheet fabric, the sheet fabric has a first wall and a second wall, and comprises a weft unit, a first warp and a second warp. The weft unit comprises a plurality of loop-shaped band groups, each of which extends along the weft direction. Each of the loop-shaped band groups comprises oppositely arranged first and second parts. The first warp is interwoven with the first part to form the first wall, and the second warp is interwoven with the second part to form the second wall. At least one of the weft unit, the first warp and the second warp is made of conductive material. The shielding layer is formed by weaving the conductive material, so that the sheet fabric has good electrical shielding property, thereby realizing the electromagnetic shielding effect. The first warp, the second warp and the loop-shaped band groups are interwoven to form the first wall and the second wall of the sheet fabric, respectively. The warp and the weft unit form a compact double-layer cylindrical structure, which has good integrity and can protect slender objects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage cable protection pipes, in particular to a double-layer shielding protection pipe and a preparation method thereof. BACKGROUND

[0002] In new energy vehicles, high-voltage wiring harness is a cable that transmits electrical energy. High-voltage wiring harness is usually used to connect battery packs, electric drive systems and other high-voltage equipment. Due to the particularity of high-voltage electrical energy, when current passes through the cable, a magnetic field is formed around the cable. This magnetic field can have a negative impact on the performance and safety of new energy vehicles. The electromagnetic radiation of high-voltage wiring harness can interfere with the communication systems inside the vehicle, such as radio communication, Bluetooth connection, etc., thereby causing a decrease in communication quality or loss of connection. In these cases, these magnetic fields can interfere with nearby electronic devices, communication systems and other sensitive equipment, thereby affecting their performance. Therefore, when designing and arranging high-voltage cables, appropriate shielding and interference control measures should be taken to ensure electromagnetic compatibility and normal operation of the equipment. SUMMARY

[0003] The present application provides a double-layer shielding protection pipe and a preparation method thereof, which can improve the compactness of the protection sleeve, improve its shielding and anti-interference performance, and ensure electromagnetic compatibility and normal operation of the equipment.

[0004] According to a first aspect, the present application provides a double-layer shielding protection pipe, comprising a sheet fabric formed by interlacing yarns, the sheet fabric is wound to form a cylindrical structure with an opening; the sheet fabric has a first wall and a second wall, the first wall is wound to form a containing cavity for wrapping an elongated object, and the sheet fabric comprises:

[0005] a weft yarn unit, the weft yarn unit comprises a plurality of loop-shaped band groups, each loop-shaped band group extends in the weft direction, and a plurality of loop-shaped band groups are arranged in the warp direction in sequence, each loop-shaped band group comprises a first part and a second part arranged in opposite parallel;

[0006] a first warp yarn, the first warp yarn passes through a plurality of loop-shaped band groups along the warp direction, and alternately passes around the inside and outside of the first part in sequence, and interweaves with the first part to form the first wall;

[0007] and a second warp yarn, the second warp yarn passes through a plurality of loop-shaped band groups along the warp direction, and alternately passes around the inside and outside of the second part in sequence, and interweaves with the second part to form the second wall;

[0008] wherein at least one of the first warp yarn, the second warp yarn and the weft yarn unit is made of conductive material.

[0009] In one embodiment, the first warp yarns include a plurality of first loop segments and first winding segments, the first loop segments are arranged between two adjacent first winding segments to connect the two adjacent first winding segments into an integral structure, each of the first winding segments passes through a plurality of the loop belt groups, and each of the first winding segments alternately passes through the inner side and the outer side of the first parts in sequence; the second warp yarns include a plurality of second loop segments and second winding segments, the second loop segments are arranged between two adjacent second winding segments to connect the two adjacent second winding segments into an integral structure, each of the second winding segments passes through a plurality of the loop belt groups, and each of the second winding segments alternately passes through the inner side and the outer side of the second parts in sequence.

[0010] In one embodiment, the cross sections of two adjacent first winding segments along the weft direction are located on different sides of the first parts; the cross sections of two adjacent second winding segments along the weft direction are located on different sides of the second parts.

[0011] In one embodiment, the plurality of loop belt groups are arranged in parallel and do not overlap.

[0012] In one embodiment, the loop belt groups include at least one loop belt; each of the loop belts includes monofilament fibers and / or multifilament fibers with different linear densities.

[0013] In one embodiment, the weft length of adjacent loop belts is the same.

[0014] In one embodiment, the materials of the first warp yarns, the second warp yarns, and the weft yarn units are all different, at least one of the first warp yarns, the second warp yarns, and the weft yarn units is a conductive material, and at least one of the first warp yarns, the second warp yarns, and the weft yarn units is a fiber material.

[0015] In one embodiment, the material of the first warp yarns is a conductive material; the material of the weft yarn units is a PET transparent fiber material; the material of the second warp yarns is a high polymer fiber material; the conductive material includes at least one of tinned copper wire, copper foil wire, stainless steel wire, and conductive fiber; the high polymer fiber material includes at least one of aramid fiber, glass fiber, chopped carbon fiber, and PTFE; the conductive material has a plurality of different wire diameters, including 0.05 mm, 0.10 mm, 0.20 mm, 0.25 mm, and 0.30 mm; the high polymer fiber includes single fiber filaments or fiber multifilaments with different linear densities, including 75D, 150D, 300D, 600D, and 1200D.

[0016] According to a second aspect, the present application provides a preparation method of a double-layer shielding protection tube, including:

[0017] A plurality of loop-shaped belt groups are provided, and the loop-shaped belt groups include a first part and a second part arranged in relative parallelism;

[0018] A plurality of the loop-shaped belt groups are arranged in sequence along the warp direction to form a weft unit;

[0019] A first warp yarn and a second warp yarn are provided;

[0020] The first warp yarn is alternately threaded through the first part in sequence along the warp direction, and interwoven with the first part to form a first wall;

[0021] The second warp yarn is alternately threaded through the second part in sequence along the warp direction, and interwoven with the second part to form a second wall;

[0022] Thus, the weft unit, the first warp yarn and the second warp yarn are interwoven to form a sheet-shaped fabric;

[0023] The sheet-shaped fabric is wound and formed into a tubular structure with an opening, and the first wall encloses to form a containing cavity for wrapping an elongated object.

[0024] In one embodiment, one of the first warp yarn and the second warp yarn is provided, the first warp yarn is alternately threaded through the first part to form a first winding segment, and the first warp yarn is pulled back at the outermost loop-shaped belt group to form a first loop-shaped segment, and the cycle is repeated until the weaving is completed; the second warp yarn is alternately threaded through the second part to form a second winding segment, and the second warp yarn is pulled back at the outermost loop-shaped belt group to form a second loop-shaped segment, and the cycle is repeated until the weaving is completed.

[0025] According to the double-layer shielding protection tube in one of the above embodiments, the first warp yarn and the second warp yarn are arranged in the first part and the second part of the loop-shaped belt group, and interwoven to form the first wall and the second wall of the sheet-shaped fabric, respectively, so that the weft unit, the first warp yarn and the second warp yarn form a compact double-layer tubular structure with good integrity, which can protect the elongated object. Since at least one of the weft unit, the first warp yarn and the second warp yarn is made of conductive material, the shielding layer is woven by the conductive material, so that the sheet-shaped fabric has good electrical shielding property, thereby realizing electromagnetic shielding effect. By interweaving the first warp yarn, the second warp yarn and the weft unit into an integrated structure, which is different from the traditional textile layer and metal layer which are separately woven and then spliced by post-processing such as sewing and welding, the post-processing process can be reduced, thereby reducing the manufacturing cost. The sheet-shaped fabric can be wound into a tubular structure with an opening, which can facilitate the maintenance and replacement of the elongated object, and further reduce the cost in the production and use process. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure diagram of a first wall of a sheet fabric in an embodiment;

[0027] Figure 2 Structure diagram of a second wall of a sheet fabric in an embodiment;

[0028] Figure 3 Structure side view of a sheet fabric in an embodiment;

[0029] Figure 4 From top to bottom cross-sectional view of a sheet fabric in an embodiment;

[0030] Figure 5 Structure diagram of a cylindrical structure in which a sheet fabric is wound in an embodiment;

[0031] Figure 6 Structure side view of a cylindrical structure in which a sheet fabric is wound in an embodiment;

[0032] Wherein: 100, sheet fabric, 110, first wall, 120, second wall, 130, weft unit, 131, loop belt group, 1311, first part, 1312, second part, 140, first warp, 141, first loop section, 142, first winding section, 150, second warp, 151, second loop section, 152, second winding section, 160, accommodating cavity. DETAILED DESCRIPTION

[0033] The application will be further described in detail by specific embodiments with reference to the accompanying drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art, who can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0034] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing one embodiment, and do not mean that the composition and / or order is necessary.

[0035] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and have no technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connections (couplings).

[0036] Reference Figures 1-6 The application provides a double-layer shielding protective sleeve, which is wrapped around an elongated element to be protected, such as a pipe or a wire harness (cable). The protective sleeve includes a sheet fabric 100 formed by interlacing yarns, the sheet fabric 100 having a first wall 110 and a second wall 120, comprising a weft unit 130, a first warp 140 and a second warp 150, the weft unit 130 comprising a plurality of loop-shaped band groups 131, each of the loop-shaped band groups 131 extending in the weft direction, and a plurality of the loop-shaped band groups 131 being arranged in parallel and not overlapping in the warp direction, each of the loop-shaped band groups 131 comprising a first portion 1311 and a second portion 1312 arranged oppositely, the first warp 140 passing through a plurality of the loop-shaped band groups 131 in the warp direction and alternately winding around the inside and outside of the first portion 1311 in sequence, interlacing with the first portion 1311 to form the first wall 110, and the second warp 150 passing through a plurality of the loop-shaped band groups 131 in the warp direction and alternately winding around the inside and outside of the second portion 1312 in sequence, interlacing with the second portion 1312 to form the second wall 120.

[0037] It should be further noted that in this application, since the first wall 110 can be wrapped to form a containing cavity 160 to accommodate the protected elongated object, the direction in which the first wall 110 is located is defined as the inside, i.e. the inside of the first portion 1311 is the side close to the containing cavity 160, and the outside is the side away from the containing cavity 160. Similarly, the inside of the second portion 1312 is the side close to the containing cavity, and the outside is the side away from the containing cavity 160.

[0038] By arranging the weft unit 130 as a plurality of loop-shaped band groups 131, and arranging the first warp 140 and the second warp 150 on the first portion 1311 and the second portion 1312 of the loop-shaped band groups 131, i.e. on the inside and outside of the loop-shaped band groups 131, an inside-outside double-layer structure is formed, making the overall structure of the sleeve more compact and close, improving the integrity of the double-layer shielding protective sleeve, reducing the displacement between the first warp 140, the second warp 150 and the loop-shaped band groups 131, and further improving the shielding protection effect of the entire protective sleeve.

[0039] Further, at least one of the weft yarn unit 130, the first warp yarn 140 and the second warp yarn 150 is made of conductive material, and at least one of the weft yarn unit 130, the first warp yarn 140 and the second warp yarn 150 is made of fiber material, and the conductive material and the fiber material are used for weaving to form a shielding layer, the conductive material enables the sheet-shaped fabric 100 to have good electrical shielding property, and the fiber material effectively reduces the mass of the sheet-shaped fabric 100 while ensuring the shielding effect and improving the softness of the sheet-shaped fabric 100; by interweaving the first warp yarn 140, the second warp yarn 150 and the weft yarn unit 130 into an integrated structure, which is different from the traditional textile layer and metal layer which are separately woven and then spliced by post-processing such as sewing and welding, the post-processing process can be reduced, thereby reducing the manufacturing cost.

[0040] Further, the cylindrical structure has an opening, which facilitates the maintenance and replacement of the elongated object, and further reduces the cost in the production and use processes.

[0041] In a specific but non-limiting embodiment, the first warp yarn 140 includes a plurality of first loop segments 141 and first winding segments 142, the first loop segments 141 are arranged between adjacent two first winding segments 142 to connect the adjacent first winding segments 142 into an integrated structure, each of the first winding segments 142 passes through a plurality of the loop belt groups 131, and each first winding segment 142 alternately passes through the inner side and the outer side of a plurality of the first parts 1311 in sequence, by interweaving the first warp yarn 140 and the plurality of loop belt groups 131 along the weft direction, the structure can be compact and the gap displacement can be reduced.

[0042] Specifically, a plurality of loop belt groups 131 extending along the weft direction are uniformly distributed along the warp direction, one yarn can be selected as the first warp yarn 140, which is first interwoven (or woven) with the plurality of loop belt groups 131 along the warp direction from one end of the loop belt group 131 in sequence until the other end of the loop belt group 131 is interwoven (or woven), then the first warp yarn 140 is pulled back (or folded back) to form a first loop segment 141, and then the first warp yarn 140 is interwoven (or woven) with the loop belt group 131 in sequence until the interweaving (or weaving) with the first loop belt group 131 is completed, and then the first warp yarn 140 is pulled back (or folded back) to form another first loop segment 141, and the above steps are repeated until the interweaving (or weaving) is completed, by arranging the first yarn 140 as one, the integrity can be further improved and the displacement can be reduced.

[0043] It can be understood that the loop-shaped band group 131 is an integral structure, the length of which in the weft direction determines the final length of the weft direction of the sheet-shaped fabric 100, the number of the loop-shaped band groups 131 and the size of each loop-shaped band group 131 in the warp direction determine the final length of the warp direction of the sheet-shaped fabric 100, and the end of the weaving means that the first warp yarn 140 is woven along the length of the weft direction of the loop-shaped band group 131, so that the loop-shaped band group 131 meeting the size requirements can be directly produced according to the size of the actual protective sleeve.

[0044] In a specific but non-limiting embodiment, the second warp yarn 150 comprises a plurality of second loop-shaped segments 151 and second winding segments 152, the second loop-shaped segments 151 are arranged between two adjacent second winding segments 152 to connect the two adjacent second winding segments 152 into an integral structure, each second winding segment 152 passes through a plurality of loop-shaped band groups 131, and each second winding segment 152 alternately passes through the inner side and the outer side of the second part 1312 in sequence.

[0045] Further, the second warp yarn 150 also interweaves (weaves) with the second part 1312 in the manner of providing a yarn, and the specific implementation manner is similar to the passing manner of the first warp yarn 140.

[0046] In a specific but non-limiting embodiment, the passing manner of two adjacent first winding segments 142 through the first part 1311 is different, the passing manner of two adjacent second winding segments 152 through the second part 1312 is different, and the passing manner of the first winding segment 142 through the first part 1311 is the same as or different from the passing manner of the second winding segment 152 through the opposite second part 1312.

[0047] Specifically, the cross sections of two adjacent first winding segments 142 in the weft direction are located on different sides of the first part 1311, and the cross sections of two adjacent second winding segments 152 in the weft direction are located on different sides of the second part 1312.

[0048] Further, in order to facilitate the description, and according to the fact that the sheet fabric 100 can be laid flat, it is specified that the first wall 110 is arranged above, and the second wall 120 is arranged below, i.e. the first part 1311 is arranged above, and the second part 1312 is arranged below (the inner side is arranged above, and the outer side is arranged below), when interlacing (or weaving), the first warp yarn 140 adopts a weaving mode of one high and one low from top to bottom, i.e. from above or below the first part 1311 of the first loop-shaped band group 131, then from below or above the first part 1311 of the second loop-shaped band group 132, then from above or below the first part 1311 of the third loop-shaped band group 131, and so on, the position (including above or below) of the first warp yarn 140 passing through the first part 1311 of the adjacent two loop-shaped band groups 131 is different, and the position (including above or below) of the first warp yarn 140 passing through the first part 1311 of the same loop-shaped band group 131 when the first warp yarn 140 is pulled back (or folded back) and continues to weave is different from the last first wire segment 142. Similarly, the second warp yarn 150 passes through the second part 1312 in a similar manner to the first warp yarn 140, but the position (including above or below) of passing through the first part 1311 or the second part 1312 at the same loop-shaped band group 131 can be the same or different, so that the weft yarn unit 130 and the first warp yarn 140 and the second warp yarn 150 are closely combined, the gap is reduced, the coverage area of the protection is improved, and the shielding or anti-interference effect is improved.

[0049] In a specific but non-limiting embodiment, the loop-shaped band group 131 includes at least one loop-shaped band, and adjacent loop-shaped bands have the same or different number of lines D.

[0050] Specifically, adjacent loop-shaped bands have the same number of lines D, and the loop-shaped bands arranged at intervals also have the same number of lines D, adjacent loop-shaped bands have different numbers of lines D, and the numbers of lines D of all loop-shaped bands in the same loop-shaped band group 131 can also be different.

[0051] In a specific but non-limiting embodiment, the loop-shaped band group 131 includes a plurality of loop-shaped bands, and the plurality of loop-shaped bands are arranged in the warp direction to form the loop-shaped band group 131.

[0052] Of course, in other embodiments, at least two of the plurality of loop-shaped bands are arranged from top to bottom, i.e. one loop-shaped band is arranged in another loop-shaped band.

[0053] In a specific but non-limiting embodiment, the loop-shaped band includes monofilament fibers and / or multifilament fibers with different numbers of lines D.

[0054] Specifically, the same circle-shaped belt can be made of monofilament fibers, can be made of a plurality of monofilament fibers with the same number of lines D, and can also be made of monofilament fibers or multifilament fibers with different numbers of lines D. Preferably, the circle-shaped belt at least includes multifilament fibers, which can reduce the gap, increase the coverage area of the protective sleeve, and make the shielding and anti-interference effect better.

[0055] In a specific but non-limiting embodiment, the materials of the first warp yarn 140, the second warp yarn 150 and the weft yarn unit are all different.

[0056] In a specific but non-limiting embodiment, the material of the first warp yarn 140 is a conductive material; the material of the weft yarn unit 130 is a PET transparent fiber; and the material of the second warp yarn 150 is a high molecular fiber.

[0057] In a specific but non-limiting embodiment, the conductive material includes at least one of tinned copper wire, copper foil wire, stainless steel wire and conductive fiber; and the high molecular fiber includes at least one of aramid fiber, glass fiber, chopped carbon fiber and PTFE. The use of wear-resistant materials can make the sheet-shaped fabric 100 and the later-shaped coiled cylindrical structure have excellent wear resistance, so that they can be used in high wear environments for a long time, effectively prolonging their service life.

[0058] In a specific but non-limiting embodiment, the conductive material has a plurality of different wire diameters, including 0.05mm, 0.10mm, 0.20mm, 0.25mm and 0.30mm; and the high molecular fiber includes a single fiber filament or a fiber multifilament with different numbers of lines D, including 75D, 150D, 300D, 600D and 1200D.

[0059] In a specific but non-limiting embodiment, the sheet-shaped fabric 100 can be coiled to form a hollow cylindrical structure, so that the first wall 110 forms a containing cavity 160 wrapping an elongated object, thereby wrapping and protecting the elongated object. The sheet-shaped fabric 100 has two opposite free edges extending along the axial direction of the cylindrical structure, the free edges are curved along the radial direction of the cylindrical structure, and overlap each other to form the coiled structure. Under the action of an external force, the free edges can be converted from the mutually overlapping coiled structure to a mutually separated open state, and the free edges return to the cylindrical structure after the external force is removed.

[0060] The application also provides a preparation method of a double-layer shielding protective tube, comprising:

[0061] A plurality of circle-shaped belt groups 131 are provided, the circle-shaped belt group 131 includes a first part 1311 and a second part 1312 arranged in opposite parallel directions;

[0062] A plurality of said loop-shaped band groups 131 are sequentially and evenly arranged along the warp direction to form a weft unit 130;

[0063] A first warp yarn 140 and a second warp yarn 150 are provided;

[0064] The first warp yarn 140 is arranged along the warp direction through a plurality of said loop-shaped band groups 131, and is alternately and sequentially wound around the inner side and the outer side of said first part 1311, and is interwoven with said first part 1311 to form a first wall 110;

[0065] The second warp yarn 150 is arranged along the warp direction through a plurality of said loop-shaped band groups 131, and is alternately and sequentially wound around the inner side and the outer side of said second part 1312, and is interwoven with said second part 1312 to form a second wall 120;

[0066] Thus, said weft unit 130, first warp yarn 140 and second warp yarn 150 are interwoven to form a sheet-shaped fabric 100;

[0067] The sheet-shaped fabric 100 is wound and formed into a cylindrical structure with an opening, so that said first wall 110 encloses a containing cavity 160 for wrapping an elongated object, and the elongated object is arranged in said containing cavity 160 during use to protect the elongated object.

[0068] Further, one said first warp yarn 140 and one said second warp yarn 150 are provided, said first warp yarn 140 is alternately and sequentially arranged through said first part 1311 to form a first winding segment 142, said first warp yarn 140 is pulled back at the outermost said loop-shaped band group 131 to form a first loop-shaped segment 141, and the cycle is repeated until the weaving is completed; said second warp yarn 150 is alternately and sequentially arranged through said second part 1312 to form a second winding segment 152, said second warp yarn 150 is pulled back at the outermost said loop-shaped band group 131 to form a second loop-shaped segment 151, and the cycle is repeated until the weaving is completed.

[0069] Further, said second warp yarn 150 is provided by a high molecular fiber, said first warp yarn 140 is provided by a conductive material, and said weft unit 130 is provided by a PET transparent fiber.

[0070] Further, a plurality of conductive materials with different diameters are provided, and a plurality of high molecular fibers or PET transparent fibers with different D numbers of single and / or multiple fibers are provided.

[0071] The above application of specific examples to illustrate the present invention, is only used to help understand the present invention, and does not limit the present invention. For the skilled in the art to which the present invention belongs, according to the idea of the present invention, several simple deductions, deformation or replacement can be made.

Claims

1. A double-layer shielded protective tube, characterized in that, The sheet fabric includes a sheet-like fabric formed by interlacing yarns, the sheet-like fabric having a first wall and a second wall, capable of being rolled up and enclosed to form an open tubular structure, such that the first wall encloses and forms a receiving cavity for enclosing an elongated object, the sheet fabric comprising: The weft unit includes multiple integral loop tape groups, each loop tape group extending along the weft direction, and the multiple loop tape groups are arranged parallel to each other along the warp direction without overlapping. Each loop tape group includes a first part and a second part arranged relatively parallel to each other. A first warp yarn is interwoven with multiple looped belt groups and interwoven cyclically along the weft direction. The first warp yarn includes multiple first looped segments and first winding segments. The first looped segments are arranged between two adjacent first winding segments to connect adjacent first winding segments into a single structure. A first warp yarn is alternately wound along the warp direction from the first part of the looped belt group at one end to the first part of the looped belt group at the other end to form the first winding segment. The first warp yarn is pulled back to form the first looped segment. Then, the first warp yarn is interwoven with the looped belt groups in sequence until the interweaving with the first looped belt group is completed. Then, it is pulled back to form another first looped segment. The above steps are repeated until the interweaving is completed and the first wall is formed by interweaving with the first part. And a second warp yarn, which interweaves with multiple looped belt groups and interweaves cyclically along the weft direction; the second warp yarn includes multiple second looped segments and second winding segments, the second looped segments being disposed between two adjacent second winding segments to connect adjacent second winding segments into a single structure; a second warp yarn is alternately wound along the warp direction from the second part of the looped belt group at one end to the second part of the looped belt group at the other end to form the second winding segment, the second warp yarn is pulled back to form the second looped segment, and then the second warp yarn is interweaved with the looped belt group in sequence until the interweaving with the first looped belt group is completed, and then pulled back to form another second looped segment, and the above steps are repeated until the interweaving is completed, and the second wall is formed by interweaving with the second part; The materials of the first warp yarn, the second warp yarn, and the weft yarn unit include at least fiber materials and conductive materials.

2. The double-layer shielded protective tube according to claim 1, characterized in that, The ways in which two adjacent first winding segments pass through the first part are different; the ways in which two adjacent second winding segments pass through the second part are different; the ways in which the first winding segment passes through the first part and the ways in which the second winding segment passes through the opposite second part are the same or different.

3. The double-layer shielded protective tube according to claim 1, characterized in that, The coiled belt group includes at least one coiled belt, and adjacent coiled belts in the same coiled belt group have the same or different line counts; each coiled belt includes monofilament fibers and / or multifilament fibers with different line counts.

4. A double-layer shielded protective tube according to claim 3, characterized in that, The latitudinal lengths of adjacent circular strips are the same.

5. A double-layer shielded protective tube according to claim 1, characterized in that, The materials of the first warp yarn, the second warp yarn, and the weft yarn unit are all different.

6. A double-layer shielded protective tube according to claim 5, characterized in that, The first warp yarn is made of a conductive material; the weft yarn unit is made of PET transparent fiber material; the second warp yarn is made of a polymer fiber material; the conductive material includes at least one of tin-plated copper wire, copper foil wire, stainless steel wire, and conductive fiber; the polymer fiber material includes at least one of aramid, glass fiber, chopped carbon fiber, and PTFE; the conductive material has various wire diameters, including 0.05mm, 0.10mm, 0.20mm, 0.25mm, and 0.30mm; the polymer fiber includes single fiber filaments or multifilaments with different denier counts, including 75D, 150D, 300D, 600D, and 1200D.

7. A method for preparing a double-layer shielded protective tube, characterized in that, include: Multiple integrally structured coiled belt assemblies are provided, each coiled belt assembly comprising a first part and a second part disposed opposite to each other; Multiple circular tape groups are arranged evenly along the warp direction to form a weft yarn unit; Provide one first warp yarn and one second warp yarn; The first warp yarn includes multiple first loop segments and first winding segments. The first loop segments are arranged between two adjacent first winding segments to connect adjacent first winding segments into a single structure. A first warp yarn is alternately wound along the warp direction from the first part of the loop tape group at one end to the first part of the loop tape group at the other end to form the first winding segment. The first warp yarn is pulled back to form the first loop segment. Then, the first warp yarn is interwoven with the loop tape group in sequence until the interweaving with the first loop tape group is completed. Then, it is pulled back to form another first loop segment. The above steps are repeated until the interweaving is completed and the first wall is formed by interweaving with the first part. The second warp yarn includes multiple second loop segments and second winding segments. The second loop segments are arranged between two adjacent second winding segments to connect adjacent second winding segments into a single structure. A second warp yarn is alternately wound along the warp direction from the second part of the loop tape group at one end to the second part of the loop tape group at the other end to form a second winding segment. The second warp yarn is pulled back to form a second loop segment. Then, the second warp yarn is interwoven with the loop tape group in sequence until the interweaving with the first loop tape group is completed. Then, it is pulled back to form another second loop segment. The above steps are repeated until the interweaving is completed and the second part is interwoven to form a second wall. Thus, the weft yarn unit, the first warp yarn, and the second warp yarn interweave to form a sheet-like fabric; the materials of the first warp yarn, the second warp yarn, and the weft yarn unit include at least fibrous materials and conductive materials; The sheet fabric is wound and shaped to form an open cylindrical structure, so that the first wall encloses and forms a cavity for containing a slender object.

8. The method for preparing a double-layer shielded protective tube according to claim 7, characterized in that, The second warp yarn is provided with polymer fibers, the first warp yarn is provided with conductive materials, and the weft yarn unit is provided with PET transparent fibers; It also includes conductive materials with multiple different wire diameters; We offer polymer fibers or PET transparent fibers formed from single and / or multiple fibers with different line denier (D) numbers.

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