Armored data cable for desert use and preparation method thereof

Abstract

The present application discloses an armored data cable for desert use and a preparation method thereof, and relates to the technical field of data transmission cables. The armored data cable for desert use comprises: a sheath structure, the sheath structure is cylindrical, and the inside of the sheath structure has a hollow cavity, a first sheath layer; a steel belt armor, the steel belt armor is arranged on the inner side of the first sheath layer; a second sheath layer, the second sheath layer is arranged on the inner side of the steel belt armor; an aluminum belt armor, the aluminum belt armor is arranged on the inner side of the second sheath layer; a third sheath layer, the third sheath layer is arranged on the inner side of the aluminum belt armor; a cable core, the cable core is arranged in the cavity. The present application enhances the protection of the cable core by arranging two layers of armor in the sheath structure, and reduces the risk of data transmission interruption caused by rodent damage. At the same time, three layers of sheath layers are arranged inside and outside the two layers of armor, and the sheath layers are all made of insulating materials with low dielectric constants, which can reduce the external radiation of the steel belt armor and the aluminum belt armor and the internal interference to the cable core.

Description

Technical Field

[0001] The present application relates to the field of data transmission cables, and in particular to an armored data cable for use in deserts and a preparation method thereof. Background Art

[0002] In desert environments, the laying and use of data cables face huge challenges. First, most desert areas are dry and windy, and sand dunes move frequently, which can easily expose data cables that were originally buried under sand and rocks to the ground, making them easily damaged by people or animals. Secondly, the large temperature difference between day and night in desert areas can easily cause thermal expansion and contraction of sheath materials, resulting in inconsistent data transmission. Finally, rodents are active in desert areas, and the outer sheath is often severely gnawed, which reduces the protection of the outer sheath to the cable core, and even worse, causes cable breakage and data transmission interruption.

[0003] For example, the Chinese utility model patent with announcement number CN201508718U discloses a "power cable for desert solar photovoltaic power station", including at least two groups of insulating cores, inner sheaths, metal armor layers and outer sheaths, each group of insulating cores is composed of a conductor and an insulating layer arranged outside the conductor, the inner sheath is arranged outside the insulating core, the metal armor layer is arranged outside the inner sheath, and the outer sheath is arranged outside the metal armor layer, characterized in that a tape layer is arranged between the insulating core and the inner sheath. The utility model cable has the advantages of high and low temperature resistance, ozone resistance, UV resistance, microbial resistance, strong short-term overload capacity, large current carrying capacity, wear resistance, oil resistance, corrosion resistance, rat bite resistance, good mechanical properties and long service life. The cable can be recycled and is environmentally friendly. It can work in an environment with drastic temperature changes from -40°C to 125°C, and can meet the needs of solar power stations and photovoltaic power systems.

[0004] The above technical solution is a desert power cable. When it is implemented on a data transmission cable, the problem of internal crosstalk in the cable needs to be considered. At the same time, the above technical solution only has one layer of metal armor, which is not enough to protect the cable core, and it is easy to cause cable breakage and data transmission interruption. Summary of the invention

[0005] The purpose of the present application is to provide an armored data cable for use in deserts and a preparation method thereof, so as to solve the protection problem of existing data cables for use in deserts and ensure data transmission efficiency.

[0006] To achieve the above-mentioned purpose, the embodiment of the present application adopts the following technical scheme: an armored data cable for desert use, comprising: a sheath structure, the sheath structure is cylindrical, and has a hollow cavity inside the sheath structure, namely, a first sheath layer; a steel belt armor, the steel belt armor is arranged on the inner side of the first sheath layer; a second sheath layer, the second sheath layer is arranged on the inner side of the steel belt armor; an aluminum belt armor, the aluminum belt armor is arranged on the inner side of the second sheath layer; a third sheath layer, the third sheath layer is arranged on the inner side of the aluminum belt armor; a cable core, the cable core is arranged in the cavity, and the cable core comprises: a skeleton, the skeleton is cross-shaped, and the end of the skeleton is against the inner wall of the sheath structure, dividing the cavity into four independent accommodating parts; a twisted pair of wires, the twisted pair of wires is arranged in the accommodating part; wherein the first sheath layer, the second sheath layer and the third sheath layer are all made of insulating material with a low dielectric constant.

[0007] In the above technical scheme, the embodiment of the present application sets two layers of armor in the sheath structure to enhance the protection of the cable core and reduce the risk of data transmission interruption caused by rodent damage. At the same time, three layers of sheath are set inside and outside the two layers of armor, and the sheath layers are all made of insulating materials with low dielectric constants, which can reduce the external radiation of steel belt armor and aluminum belt armor and the internal interference to the cable core. Finally, the aluminum belt armor is set on the inner side of the steel belt armor, which can shield the cable core from external electromagnetic interference and block internal signal radiation.

[0008] Further, according to an embodiment of the present application, the thickness of the first sheath layer, the second sheath layer and the third sheath layer is not less than 1.5 mm.

[0009] Further, according to an embodiment of the present application, the thickness of the steel strip armor is 0.5-0.8 mm.

[0010] Further, according to an embodiment of the present application, the thickness of the aluminum tape armor is 0.2-0.3 mm.

[0011] Furthermore, according to an embodiment of the present application, the skeleton is made of high-density PE material.

[0012] Further, according to an embodiment of the present application, the twisted pair wire is formed by two conductors twisted together, and the outer side of the conductor is wrapped with an insulating layer by extrusion.

[0013] Further, according to an embodiment of the present application, a plurality of water-blocking rings are arranged at intervals on the outside of the third sheath layer, the outside of the aluminum tape armor, the outside of the second sheath layer, and the outside of the steel tape armor.

[0014] Further, according to an embodiment of the present application, the spacing distance between the water blocking rings is 1-1.5 mm.

[0015] Further, according to an embodiment of the present application, the water-blocking ring is formed by water-blocking gel surrounding the third sheath layer, the aluminum tape armor, the second sheath layer or the steel tape armor.

[0016] Further, according to an embodiment of the present application, a shielding layer is provided between the sheath structure and the cable core.

[0017] In order to achieve the above-mentioned purpose, the embodiment of the present application also discloses a method for preparing an armored data cable for desert use, comprising the following steps:

[0018] Making twisted pair cables: prepare the raw material copper rod of the conductor, draw the copper rod, and then coat the copper wire with insulating material PE so that the outer side of the copper wire conductor is wrapped with an insulating layer; then, twist the two conductors with insulating layers into a twisted pair cable;

[0019] Making the cable core: Install four twisted pair cables in the accommodating cavity of the skeleton through a cabling machine to make a cable core;

[0020] Making the sheath structure: after covering the third sheath layer on the outside of the cable core, the aluminum tape armor, the second sheath layer, the steel tape armor and the first sheath layer are arranged in sequence.

[0021] Further, according to an embodiment of the present application, after completing the step of making the cable core, a shielding layer is wrapped around the outside of the cable core.

[0022] Further, according to an embodiment of the present application, in the step of making the sheath structure, a plurality of water-blocking rings are arranged at intervals on the outside of the third sheath layer, the outside of the aluminum strip armor, the outside of the second sheath layer, and the outside of the steel strip armor. The water-blocking rings are formed by water-blocking gel surrounding the third sheath layer, the aluminum strip armor, the second sheath layer or the steel strip armor.

[0023] Compared with the prior art, the present application has the following beneficial effects: the present application provides two layers of armor in the sheath structure to enhance the protection of the cable core and reduce the risk of data transmission interruption caused by rodent damage. At the same time, three layers of sheath are provided inside and outside the two layers of armor, and the sheath layers are all made of insulating materials with low dielectric constants, which can reduce the external radiation of the steel belt armor and the aluminum belt armor and the internal interference to the cable core. Finally, the aluminum belt armor is provided on the inner side of the steel belt armor, which can shield the cable core from external electromagnetic interference and block internal signal radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of an armored data cable for desert use in Example 1 of the present application.

[0026] Figure 2This is a schematic diagram of the structure of an armored data cable for desert use in Example 2 of the present application.

[0027] In the attached figure

[0028] 1. First sheath layer 2. Steel belt armor 3. Second sheath layer

[0029] 4. Aluminum tape armor 5. Third sheath layer 6. Frame

[0030] 7. Insulation layer 8. Conductor 9. Shielding layer DETAILED DESCRIPTION

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0035] [Example 1]

[0036] Figure 1 The specific structure of a desert armored data cable in this application is shown. Figure 1 As shown, the desert armored data cable described in this embodiment includes a sheath structure and a cable core. The sheath structure is a cylindrical structure with a hollow cavity inside, and the cable core is arranged in the cavity.

[0037] In the present application, in order to make the data cable more adaptable to the harsh environment of sandy deserts, the above-mentioned sheath structure includes, from the outside to the inside, a first sheath layer 1, a steel belt armor 2, a second sheath layer 3, an aluminum belt armor 4 and a third sheath layer 5. Among them, the first sheath layer 1, the second sheath layer 3 and the third sheath layer 5 are all made of insulating materials with low dielectric constants, and the thickness is not less than 1.5mm, the thickness of the steel belt armor 2 is 0.2-0.8mm, and the thickness of the aluminum belt armor is 0.2-0.3mm.

[0038] In the above technical solution, the present application sets two layers of armor in the sheath structure to enhance the protection of the cable core and reduce the risk of data transmission interruption caused by rodent damage. At the same time, three layers of sheath are set inside and outside the two layers of armor, and the sheath layers are all made of insulating materials with low dielectric constants, which can reduce the external radiation of the steel belt armor 2 and the aluminum belt armor 4 and the internal interference to the cable core. Finally, the aluminum belt armor 4 is set on the inner side of the steel belt armor 2, which can shield the cable core from external electromagnetic interference and block internal signal radiation.

[0039] Secondly, the cable core includes a skeleton 6 and twisted wires. The skeleton 6 is cross-shaped, and its end is against the inner wall of the sheath structure, dividing the cavity in the sheath into four independent accommodating parts, in which the twisted wires are arranged. The skeleton 6 is made of high-density PE material, which has a low dielectric constant and can reduce crosstalk between the twisted wires.

[0040] The twisted pair is formed by twisting two conductors 8 together, and an insulating layer 7 is wrapped around the outside of the conductor 8 by extrusion. In this embodiment, the insulating layer 7 is made of a high-density PE material, which has a low dielectric constant and can prevent the conductors 8 from interfering with each other. At the same time, the PE material used in the insulating layer 7 also provides a certain protection function. The conductor 8 is made of 99.95% oxygen-free copper and has a high conductivity.

[0041] In order to make the first sheath layer 1, the steel tape armor 2, the second sheath layer 3, the aluminum tape armor 4 and the third sheath layer 5 fit closely, a plurality of water blocking rings can be arranged at intervals on the outside of the third sheath layer 5, the outside of the aluminum tape armor 4, the outside of the second sheath layer 3 and the outside of the steel tape armor 2. The water blocking rings are formed by water blocking gel surrounding the third sheath layer 5, the aluminum tape armor 4, the second sheath layer 3 or the steel tape armor 2. Preferably, the interval between the water blocking rings is 1-1.5m.

[0042] In this regard, by setting a water-blocking ring between the armor and the sheath layer, the armor and the sheath layer can be firmly bonded, reducing the space for expansion or contraction of the first sheath layer 1, the second sheath layer 3 and the third sheath layer 5, reducing the shrinkage rate of the first sheath layer 1, the second sheath layer 3 and the third sheath layer 5, and reducing the impact of the large temperature difference between day and night in desert areas.

[0043] Preferably, the gel strength of the selected water-blocking gel is 1000-1500Pa. The gel strength is tested by a flat plate rheometer. Within this gel strength range, the viscosity change rate of the water-blocking gel under multiple thermal cycle tests is small. The test steps of the multiple thermal cycle test are: put the water-blocking gel into a rotational viscometer for measurement, and measure the initial viscosity η0; then, put the water-blocking gel into an oven at 95°C and heat it for 8 hours, then cool it to 20°C (8 hours), and repeat this step 60 times. At this time, the viscosity of the water-blocking gel is measured to be η1. The viscosity change rate is calculated using the following formula:

[0044]

[0045] The test results are shown in Table 1.

[0046] Table 1

[0047] Example 1 Example 2 Example 3 Example 4 Example 5 Implementation 6 Comparative Example 1 Comparative Example 2 Gel strength (Pa) 1000 1100 1200 1300 1400 1500 900 800 Viscosity change rate (%) 24.3 22.8 21.5 20.4 19.1 18.9 37.9 47.6

[0048] [Example 2]

[0049] Figure 2 The specific structure of another armored data cable for desert use in this application is shown. Figure 2As shown, based on the first embodiment, a shielding layer 9 is provided between the sheath structure and the cable core in this embodiment, and the shielding layer 9 is made of metal foil, preferably aluminum foil. The metal foil is wrapped or coated on the outside of the cable core, and overlaps at the overlapped part of the wrapping or coating to ensure its shielding effect, and specifically in this embodiment, the overlap rate is greater than or equal to 25%.

[0050] The other structures in this embodiment are consistent with those in the first embodiment and have the same technical effects, and will not be described in detail here.

[0051] [Example 3]

[0052] This embodiment discloses a method for preparing an armored data cable for use in deserts, comprising the following steps:

[0053] a) Making a twisted pair: preparing a raw material copper rod of the conductor 8, drawing the copper rod, and then coating the copper wire with an insulating material PE so that the outer side of the copper wire conductor 8 is wrapped with an insulating layer 7; then, twisting two conductors 8 with the insulating layer 7 into a twisted pair;

[0054] b) Making a cable core: installing four twisted pair cables in the accommodating cavity of the skeleton 6 by a cabling machine to make a cable core;

[0055] c) Making a sheath structure: After the third sheath layer 5 is coated on the outside of the cable core, an aluminum tape armor 4, a second sheath layer 3, a steel tape armor 2 and a first sheath layer 1 are sequentially arranged.

[0056] Furthermore, after the step of manufacturing the cable core is completed, a shielding layer 9 may be wrapped around the outer side of the cable core.

[0057] Furthermore, in the step of manufacturing the sheath structure, a plurality of water-blocking rings can be arranged at intervals on the outside of the third sheath layer 5, the outside of the aluminum strip armor 4, the outside of the second sheath layer 3, and the outside of the steel strip armor 2. The water-blocking rings are formed by water-blocking gel surrounding the third sheath layer 5, the aluminum strip armor 4, the second sheath layer 3 or the steel strip armor 2.

[0058] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. An armored data cable for desert use, characterized in that: include: The sheath structure is cylindrical and has a hollow cavity inside. a first sheath layer; Steel belt armor, the steel belt armor is arranged on the inner side of the first sheath layer; a second sheath layer, the second sheath layer being arranged on the inner side of the steel belt armor; Aluminum tape armor, the aluminum tape armor is arranged on the inner side of the second sheath layer; A third sheath layer, the third sheath layer is arranged on the inner side of the aluminum tape armor; A cable core, wherein the cable core is arranged in the cavity, and the cable core comprises: A frame, the frame is cross-shaped, and the end of the frame is against the inner wall of the sheath structure, dividing the cavity into four independent accommodating parts; A twisted pair of wires, the twisted pair of wires being arranged in the accommodation portion; Wherein, the first sheath layer, the second sheath layer and the third sheath layer are all made of insulating materials with low dielectric constant; The twisted pair wire is formed by twisting two conductors together, and the outer side of the conductor is wrapped with an insulating layer by extrusion; A plurality of water blocking rings are arranged at intervals on the outside of the third sheath layer, the outside of the aluminum tape armor, the outside of the second sheath layer, and the outside of the steel tape armor.

2. The desert armored data cable according to claim 1, characterized in that: The thickness of the first sheath layer, the second sheath layer and the third sheath layer is not less than 1.5 mm.

3. The desert armored data cable according to claim 1, characterized in that: The thickness of the steel belt armor is 0.5-0.8 mm.

4. The desert armored data cable according to claim 1, characterized in that: The thickness of the aluminum tape armor is 0.2-0.3 mm.

5. The desert armored data cable according to claim 1, characterized in that: The frame is made of high-density PE material.

6. The desert armored data cable according to claim 1, characterized in that: The interval between the water blocking rings is 1-1.5 mm.

7. The desert armored data cable according to claim 1, characterized in that: The water-blocking ring is formed by water-blocking gel surrounding the third sheath layer, the aluminum tape armor, the second sheath layer or the steel tape armor.

8. The desert armored data cable according to claim 1, characterized in that: A shielding layer is arranged between the sheath structure and the cable core.

9. A method for preparing a desert armored data cable as claimed in claim 1, characterized in that: The following steps are involved: Making twisted pair cables: prepare the raw material copper rod of the conductor, draw the copper rod, and then coat the copper wire with insulating material PE so that the outer side of the copper wire conductor is wrapped with an insulating layer; then, twist the two conductors with insulating layers into a twisted pair cable; Making the cable core: Install four twisted pair cables in the accommodating cavity of the skeleton through a cabling machine to make a cable core; Making the sheath structure: after covering the third sheath layer on the outside of the cable core, the aluminum tape armor, the second sheath layer, the steel tape armor and the first sheath layer are arranged in sequence.

10. The method for preparing a desert armored data cable according to claim 9, characterized in that: After completing the cable core manufacturing step, a shielding layer is wrapped around the outside of the cable core.

11. The method for preparing a desert armored data cable according to claim 9, characterized in that: In the step of making the sheath structure, multiple water-blocking rings are arranged at intervals on the outside of the third sheath layer, the outside of the aluminum strip armor, the outside of the second sheath layer, and the outside of the steel strip armor. The water-blocking rings are formed by water-blocking gel surrounding the third sheath layer, the aluminum strip armor, the second sheath layer or the steel strip armor.

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