A tensile resistant insulated cable

Abstract

The utility model relates to the technical field of insulated cable, and disclose a kind of tensile resistance insulated cable, the tensile resistance insulated cable, including conductor unit and honeycomb support framework, the conductor unit is formed by surrounding a central reinforcing core with multiple interlaced filling layers, the conductor unit is arranged in the central chamber inside honeycomb support framework, each chamber of the honeycomb support framework is regular hexagon, the modified butyl rubber filling strip is arranged in the inside of honeycomb support framework side wall.The tensile resistance insulated cable, through the composite structure design of central reinforcing core and interlaced filling layer, make conductor unit when bearing tensile force can evenly disperse stress, reduce local concentration, to realize the promotion of overall tensile strength, through the design of honeycomb framework, aerogel filling and matrix composite, compared with the single solid structure of traditional insulation layer, while guaranteeing insulation performance, make the tensile deformation ability of insulation layer, temperature resistance are all improved.

Description

Technical Field

[0001] This utility model relates to the field of insulated cable technology, specifically to a tensile-resistant insulated cable. Background Technology

[0002] Insulated cables, as a key component in the fields of power transmission and signal communication, are widely used in industries such as energy, transportation, construction, and industrial automation. With the increasing demands of modern engineering on cable laying environment, span length, and mechanical performance, especially in special scenarios such as bridges, mines, and offshore platforms, cables not only need to have stable electrical insulation performance, but also need to withstand large tensile, bending, and vibration loads. Therefore, tensile performance has become an important indicator for measuring cable reliability.

[0003] Currently, most insulated cables on the market use a single solid insulation layer or a simple multi-layer sheath structure. Their tensile strength mainly depends on the conductor material itself or the outer sheath reinforcement layer. When subjected to large tensile forces, this structure is prone to stress concentration, which may cause cracks, deformation or even breakage of the insulation layer, thereby reducing the service life and safety of the cable.

[0004] In view of this, we propose a tensile-resistant insulated cable. Utility Model Content

[0005] The purpose of this invention is to provide a tensile-resistant insulated cable to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A tensile-resistant insulated cable includes conductor units and a honeycomb-shaped support skeleton. The conductor unit is formed by multiple interstrand filler layers twisted together around a central reinforcing core. The conductor unit is disposed inside the central cavity of the honeycomb-shaped support skeleton. Each cavity of the honeycomb-shaped support skeleton is a regular hexagon. Modified butyl rubber filler strips are disposed inside the sidewalls of the honeycomb-shaped support skeleton. Aerogel heat-insulating particles are filled inside the edge cavities of the honeycomb-shaped support skeleton. An insulation layer is covered on the outside of the honeycomb-shaped support skeleton. The insulation layer is a three-layer co-extruded structure consisting of an inner elastic layer, a middle adhesive layer, and an outer tear-resistant layer. The inner elastic layer is directly covered on the outside of the honeycomb-shaped support skeleton. The middle adhesive layer is located between the inner elastic layer and the outer tear-resistant layer. The outer tear-resistant layer is located outside the middle adhesive layer. An insulating matrix is ​​filled between the outside of the honeycomb-shaped support skeleton and the inner elastic layer. The insulating matrix is ​​thermally fused with the inner elastic layer. The material of the insulating matrix is ​​silane cross-linked polyethylene.

[0007] In a further embodiment, the central reinforcing core is a composite core formed by pultrusion molding of basalt fiber and modified epoxy resin.

[0008] In a further embodiment, the diameter of the central reinforcing core is 4.0 mm to 5.5 mm.

[0009] In a further embodiment, the interstitial filling layer comprises six layers.

[0010] In a further embodiment, the modified butyl rubber filler strip, aerogel insulation particles, and insulating matrix are each provided in six sets, and the six sets of the modified butyl rubber filler strip, aerogel insulation particles, and insulating matrix are arranged in an equally spaced circular array with the center of the circular cross-section of the central reinforcing core as the array center.

[0011] In a further embodiment, the inner elastic layer is made of TPE-E thermoplastic elastomer, and the thickness of the inner elastic layer is 0.3 mm to 0.5 mm; the middle adhesive layer is made of maleic anhydride-grafted polyethylene, and the thickness of the middle adhesive layer is 0.1 mm to 0.2 mm; the outer tear-resistant layer is made of aramid short fiber reinforced polypropylene containing 20% ​​aramid short fibers, and the thickness of the outer tear-resistant layer is 1.5 mm to 2.0 mm.

[0012] In a further embodiment, the aerogel insulating particles have a particle size of 50 nm to 100 nm.

[0013] Compared with the prior art, the present invention provides a tensile-resistant insulated cable with the following advantages: 1. In order to improve the tensile strength of the cable, this tensile-resistant insulated cable adopts a composite structure design of central reinforcing core and inter-strand filling layer. This allows the conductor unit to evenly distribute stress when subjected to tensile force, reducing local concentration and thus improving the overall tensile strength. Through the design of honeycomb skeleton, aerogel filling and matrix composite, compared with the traditional single solid structure of insulation layer, the tensile deformation resistance and temperature resistance of insulation layer are improved while ensuring insulation performance.

[0014] 2. In order to maintain stable insulation performance under tensile deformation, this tensile-resistant insulated cable uses a combination of a honeycomb support skeleton and an insulation matrix, along with a three-layer protective structure consisting of an inner elastic layer, a middle adhesive layer, and an outer tear-resistant layer. This effectively buffers the impact of cable deformation on the insulation layer, prevents cracks from forming and spreading, and thus achieves the effect of maintaining good insulation performance even under large tensile deformation. Attached Figure Description

[0015] Fig. 1 This is a schematic diagram of the overall cross-sectional structure of this utility model; Fig. 2 This is a schematic diagram of the overall partition cross-sectional structure of this utility model; Fig. 3 This is an exploded view of the overall cross-sectional structure of this utility model.

[0016] Explanation of icon numbers: 1. Central reinforcing core; 2. Interstrand filling layer; 3. Honeycomb support skeleton; 4. Modified butyl rubber filler strip; 5. Aerogel insulation particles; 6. Inner elastic layer; 7. Middle adhesive layer; 8. Outer tear-resistant layer; 9. Insulating matrix. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0019] Please see Figs. 1-3 This utility model provides a technical solution: A tensile-resistant insulated cable includes a conductor unit formed by six interstrand filler layers 2 twisted together around a central reinforcing core 1, and a honeycomb support frame 3. The diameter of the central reinforcing core 1 is 4.0 mm to 5.5 mm. The central reinforcing core 1 is a composite core formed by pultrusion molding of basalt fiber and modified epoxy resin. Six interstrand filler layers 2 are provided. The conductor unit is located inside the central cavity of the honeycomb support frame 3. Each cavity of the honeycomb support frame 3 is a regular hexagon. Modified butyl rubber filler strips 4 are provided inside the sidewalls of the honeycomb support frame 3. Aerogel insulating particles 5 are filled inside the edge cavities of the honeycomb support frame 3. The particle size of the aerogel insulating particles 5 is 50 nm to 100 nm. The honeycomb support frame 3 is covered with an insulation layer, which is a three-layer co-extruded structure consisting of an inner elastic layer 6, a middle adhesive layer 7, and an outer tear-resistant layer 8. The material of the inner elastic layer 6 is TPE-E thermoplastic elastomer, and the thickness of the inner elastic layer 6 is 0.3 μm. The thickness of the middle adhesive layer 7 is 0.1mm to 0.2mm. The outer tear-resistant layer 8 is made of aramid short fiber reinforced polypropylene containing 20% ​​aramid short fiber. The thickness of the outer tear-resistant layer 8 is 1.5mm to 2.0mm. The inner elastic layer 6 directly covers the outside of the honeycomb support skeleton 3. The middle adhesive layer 7 is located between the inner elastic layer 6 and the outer tear-resistant layer 8. The outer tear-resistant layer 8 is located outside the middle adhesive layer 7. The gap between the outside of the honeycomb support skeleton 3 and the inner elastic layer 6 is filled with an insulating substrate 9. The insulating substrate 9 and the inner elastic layer 6 are thermally fused. The insulating substrate 9 is made of silane cross-linked polyethylene. Compared with the traditional single solid structure of the insulation layer, while ensuring the insulation performance, the tensile deformation resistance and temperature resistance of the insulation layer are improved. It effectively buffers the influence of cable body deformation on the insulation layer, prevents crack generation and propagation, and thus achieves the effect of maintaining good insulation performance even under large tensile deformation.

[0020] In one embodiment of this utility model, the diameter of the central reinforcing core 1 is 5.0 mm, the thickness of the inner elastic layer 6 is 0.4 mm, the thickness of the middle adhesive layer 7 is 0.15 mm, the thickness of the outer tear-resistant layer 8 is 1.75 mm, and the particle size of the aerogel heat insulation particles 5 is 70 nm.

[0021] In one embodiment of this utility model, six sets of modified butyl rubber filler strips 4, aerogel heat insulation particles 5 and insulating matrix 9 are provided, and the six sets of modified butyl rubber filler strips 4, aerogel heat insulation particles 5 and insulating matrix 9 are arranged in an equally spaced circular array with the center of the circular cross-section of the central reinforcing core 1 as the array center, so that the stress dispersion effect of the regular hexagonal honeycomb is optimal.

[0022] All standard parts used in this application can be purchased from the market and will not be described in detail here.

[0023] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A tensile-resistant insulated cable, characterized in that, The device includes a conductor unit and a honeycomb support frame (3). The conductor unit is formed by multiple interstrand filling layers (2) twisted together around a central reinforcing core (1). The conductor unit is located inside the central cavity of the honeycomb support frame (3). Modified butyl rubber filling strips (4) are provided inside the sidewalls of the honeycomb support frame (3). Aerogel insulating particles (5) are filled inside the edge cavities of the honeycomb support frame (3). The honeycomb support frame (3) is covered with an insulating layer. It is a three-layer co-extruded structure consisting of an inner elastic layer (6), a middle adhesive layer (7), and an outer tear-resistant layer (8). The inner elastic layer (6) is directly wrapped around the outside of the honeycomb support skeleton (3). The middle adhesive layer (7) is located between the inner elastic layer (6) and the outer tear-resistant layer (8). The outer tear-resistant layer (8) is located outside the middle adhesive layer (7). The gap between the outside of the honeycomb support skeleton (3) and the inner elastic layer (6) is filled with an insulating substrate (9). The insulating substrate (9) and the inner elastic layer (6) are thermally fused.

2. The tensile-resistant insulated cable according to claim 1, characterized in that: The central reinforcing core (1) is a composite core formed by pultrusion of basalt fiber and modified epoxy resin.

3. The tensile-resistant insulated cable according to claim 2, characterized in that: The diameter of the central reinforcing core (1) is 4.0 mm to 5.5 mm.

4. The tensile-resistant insulated cable according to claim 1, characterized in that: The interstitial filling layer (2) has six layers.

5. The tensile-resistant insulated cable according to claim 1, characterized in that: The modified butyl rubber filler strip (4), aerogel heat insulation particles (5) and insulating matrix (9) are provided in multiple sets, and the multiple sets of the modified butyl rubber filler strip (4), aerogel heat insulation particles (5) and insulating matrix (9) are arranged in a circular array with equal spacing, with the center of the circular cross-section of the central reinforcing core (1) as the array center.

6. The tensile-resistant insulated cable according to claim 1, characterized in that: The thickness of the inner elastic layer (6) is 0.3 mm to 0.5 mm, the thickness of the middle adhesive layer (7) is 0.1 mm to 0.2 mm, and the thickness of the outer tear-resistant layer (8) is 1.5 mm to 2.0 mm.

7. The tensile-resistant insulated cable according to claim 1, characterized in that: The aerogel insulating particles (5) have a particle size of 50 nm to 100 nm.

Images