Cross-linked environment-friendly torsion-resistant low-smoke halogen-free cable

Abstract

The utility model discloses a cross-linked environment-friendly torsion-resistant low-smoke halogen-free cable, which belongs to the technical field of cables and comprises a cable core unit, a filling layer is coated outside the cable core unit, a plurality of grooves are formed in the outer wall of the filling layer in a sunken manner, a belting layer is arranged outside the filling layer, a space enclosed by the belting layer and the grooves forms an accommodating groove, and the accommodating groove is communicated with the cable core unit. An anti-twisting strip is installed in the containing groove in the length direction of the cable, the anti-twisting strip is made of a high-elastic material, the sectional area of the containing groove is larger than that of the anti-twisting strip, the anti-twisting strip abuts against the groove bottom wall of the groove and the belting layer, an inner lining layer is arranged outside the belting layer, an armor layer is arranged outside the inner lining layer, an outer sheath is arranged outside the armor layer, and the outer sheath is sleeved with the anti-twisting strip. The outer part of the outer sheath is provided with a wear-resistant layer, and the inner part of the outer sheath is provided with a plurality of anti-torsion steel wires. According to the utility model, the anti-torsion strips and the anti-torsion steel wires respectively carry out torsion resistance on the cable from the inner side and the outer side of the cable, and when the cable is pressed, the anti-torsion strips can generate elastic deformation so as to buffer pressure, so that the anti-pressure capability is strong.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular, to a cross-linked, environmentally friendly, torsion-resistant, low-smoke, halogen-free cable. Background Technology

[0002] Anti-torsion power cables are a special type of cable with excellent anti-torsion capabilities. Since continuous torsional motion greatly accelerates the aging of cables, anti-torsion power cables have emerged to address this need.

[0003] In existing technologies, compared to ordinary power cables, anti-torsion power cables prevent torsion by adding an anti-torsion steel wire to the center inside the filler strip. Multiple strands of metal conductors surround the anti-torsion steel wire, which effectively increases the cable's resistance to torsion and prevents the internal metal conductors from breaking due to excessive torsion. This arrangement can enhance the cable's torsion resistance to a certain extent. However, because the anti-torsion steel wire is located in the center of the cable, its anti-torsion effect is relatively strong at the center of the cable, while its anti-torsion effect near the outer sheath is quite limited. This makes the structure around the outer sheath of the cable susceptible to damage due to large torsional forces when the cable is subjected to torsional deformation, seriously affecting the normal use of the cable. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the external torsional resistance of cables is relatively weak in the prior art. Based on this, this utility model provides a cross-linked environmentally friendly torsional low-smoke halogen-free cable.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable, including a cable core unit, the cable core unit is covered with a filling layer, the outer wall of the filling layer is recessed to form multiple grooves, the filling layer is provided with a wrapping layer outside the filling layer, the space enclosed by the wrapping layer and the grooves forms a receiving groove, an anti-torsion strip is installed in the receiving groove along the length direction of the cable, the anti-torsion strip is made of a high elastic material, the cross-sectional area of ​​the receiving groove is larger than the cross-sectional area of ​​the anti-torsion strip, and the anti-torsion strip abuts against the bottom wall of the groove and the wrapping layer, the wrapping layer is provided with an inner lining layer outside the wrapping layer, the inner lining layer is provided with an armor layer outside the inner lining layer, the armor layer is provided with an outer sheath outside the armor layer, the outer sheath is provided with a wear-resistant layer outside the outer sheath, and multiple anti-torsion steel wires are provided inside the outer sheath.

[0006] Furthermore, the groove is an arc-shaped groove, and the anti-torsion strip has a circular cross-section.

[0007] Furthermore, there are four grooves and four cable core units, which are evenly distributed within the filling layer, and each groove is disposed between any two adjacent cable core units.

[0008] Furthermore, the groove opening is smoothly connected to the outer surface of the filling layer.

[0009] Furthermore, the anti-torsion strip is made of silicone material.

[0010] Furthermore, the cable core unit includes a conductor, a fire-resistant layer, and an insulation layer, wherein the fire-resistant layer is disposed outside the conductor, and the insulation layer is disposed outside the fire-resistant layer.

[0011] Furthermore, the wrapping layer is made of mica tape wound around itself.

[0012] Furthermore, the inner lining is made of polyvinyl chloride or polyethylene material.

[0013] Furthermore, the outer sheath is made of cross-linked polyethylene material.

[0014] The beneficial effects of this utility model are as follows: The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable of this utility model uses anti-torsion strips and anti-torsion steel wires to resist torsion from both the inner and outer sides of the cable. This ensures that the inner core unit and the outer sheath and wear-resistant layer of the cable all have good anti-torsion properties, preventing damage to the core unit, outer sheath, and wear-resistant layer. In addition, the anti-torsion strip has good elasticity. When the cable is deformed under pressure, the anti-torsion strip can undergo elastic deformation to buffer the pressure. The relatively large accommodating groove provides sufficient deformation space for the anti-torsion strip, improving the response speed of the anti-torsion strip to buffer pressure during elastic deformation, thereby enhancing the cable's compressive strength. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a structural schematic diagram of the cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable of this utility model.

[0017] Among them, 1. Cable core unit, 11. Conductor, 12. Fire-resistant layer, 13. Insulation layer, 2. Filling layer, 3. Wrapping tape layer, 31. Receiving groove, 4. Anti-torsion strip, 5. Inner lining layer, 6. Armor layer, 7. Outer sheath, 8. Wear-resistant layer, 9. Anti-torsion steel wire. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] Please see Figure 1 This utility model provides a cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable, including multiple cable core units 1. The cable core unit 1 is covered with a filling layer 2. Multiple grooves are formed on the outer wall of the filling layer 2. A wrapping layer 3 is provided outside the filling layer 2. The space enclosed by the wrapping layer 3 and the grooves forms a receiving groove 31. An anti-torsion strip 4 is installed in the receiving groove 31 along the length of the cable. The anti-torsion strip 4 is made of a high elastic material. The cross-sectional area of ​​the receiving groove 31 is larger than the cross-sectional area of ​​the anti-torsion strip 4. The anti-torsion strip 4 abuts against the bottom wall of the groove 31 and the wrapping layer 3. An inner lining layer 5 is provided outside the wrapping layer 3. An armor layer 6 is provided outside the inner lining layer 5. An outer sheath 7 is provided outside the armor layer 6. A wear-resistant layer 8 is provided outside the outer sheath 7. Multiple anti-torsion steel wires 9 are provided inside the outer sheath 7. The multiple anti-torsion steel wires 9 are evenly arranged along the circumference of the outer sheath 7.

[0020] This utility model discloses a cross-linked, environmentally friendly, anti-torsion, low-smoke, halogen-free cable. The anti-torsion strip 4 and anti-torsion wire 9, made of high-elasticity material, possess excellent flexibility and toughness, ensuring the cable has both bending and torsional resistance. The anti-torsion strip 4 and anti-torsion wire 9 provide anti-torsion protection from both the inner and outer sides of the cable, ensuring good anti-torsion performance for the inner core unit 1 and the outer sheath 7 and wear-resistant layer 8, preventing damage to these components. Furthermore, the anti-torsion strip 4 exhibits good elasticity; when the cable is compressed and deformed, it can elastically deform to buffer the pressure. The relatively large accommodating groove 31 provides sufficient deformation space for the anti-torsion strip 4, improving its response speed during elastic deformation and thus enhancing the cable's compressive strength.

[0021] The cable core unit 1 includes a conductor 11, a fire-resistant layer 12, and an insulation layer 13. The fire-resistant layer 12 is disposed outside the conductor 11, and the insulation layer 13 is disposed outside the fire-resistant layer 12. In this embodiment, the conductor 11 is copper wire, and the fire-resistant layer 12 is made of a low-smoke halogen-free material to achieve good fire resistance. The insulation layer 13 is made of silicone material. As a preferred embodiment, there are four cable core units 1, which are evenly distributed within the filler layer 2.

[0022] The filling layer 2 has an overall circular structure, the grooves are arc-shaped grooves, and the anti-twist strip 4 has a circular cross-section. In this embodiment, the number of grooves is the same as the number of cable core units 1, which is also set to four. In a specific embodiment, each groove is set between any two adjacent cable core units 1, thus making full use of the space on the filling layer 2, which is staggered from the cable core units 1, resulting in a more compact structure.

[0023] Furthermore, the groove opening is smoothly connected to the outer surface of the filling layer 2 to eliminate the damage to the wrapping layer 3 caused by the sharp edges of the groove.

[0024] In this embodiment, the anti-torsion strip 4 is made of silicone material. Silicone has high elasticity and excellent physical properties, and can undergo large deformation under external force to buffer the pressure. It can also quickly return to its original shape after the external force is removed. It is reliable and has high stability.

[0025] The wrapping layer 3 is wound around the outside of the filler layer 2, and the wrapping layer 3 presses the anti-twist strip 4 into the groove, thereby sealing and fixing the anti-twist strip 4, which is beneficial for subsequent processing. In addition, in this embodiment, the wrapping layer 3 is made of mica tape, which can play a role in heat insulation and improve the fire resistance of the cable.

[0026] The inner liner 5 is used to protect the strap layer 3, preventing it from loosening and being damaged by external machinery. In this embodiment, the inner liner 5 is particularly effective in preventing the armor layer 6 from damaging the strap layer 3. The inner liner 5 is made of polyvinyl chloride or polyethylene.

[0027] Armor layer 6 significantly enhances the tensile and compressive strength of the cable, extending its service life. Simultaneously, armor layer 6 provides excellent shielding, improving the cable's anti-interference performance and ensuring operational stability. Armor layer 6 is either a steel braided layer or an aluminum braided layer.

[0028] The outer sheath 7 is made of cross-linked polyethylene (XLPE). Compared to ordinary polyethylene, XLPE is less prone to degradation and aging during long-term use, thus extending the cable's service life. XLPE is also a recyclable material, enabling resource recycling, reducing waste and environmental pollution, and making it more environmentally friendly.

[0029] The wear-resistant layer 8 is made of wear-resistant material. In this embodiment, the wear-resistant layer 8 is made of polyurethane material. Polyurethane has excellent wear resistance and can resist mechanical action such as friction and scratching, thereby reducing wear on the cable surface.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cross-linked, environmentally friendly, torsion-resistant, low-smoke, halogen-free cable, comprising a core unit, wherein the core unit is externally covered with a filler layer, characterized in that: Multiple grooves are recessed on the outer wall of the filler layer. A wrapping layer is provided outside the filler layer. The space enclosed by the wrapping layer and the grooves forms a receiving groove. An anti-twist strip is installed in the receiving groove along the length of the cable. The anti-twist strip is made of a high-elasticity material. The cross-sectional area of ​​the receiving groove is larger than the cross-sectional area of ​​the anti-twist strip. The anti-twist strip abuts against the bottom wall of the groove and the wrapping layer. An inner lining layer is provided outside the wrapping layer. An armor layer is provided outside the inner lining layer. An outer sheath is provided outside the armor layer. A wear-resistant layer is provided outside the outer sheath. Multiple anti-twist steel wires are provided inside the outer sheath.

2. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in claim 1, characterized in that: The groove is an arc-shaped groove, and the anti-torsion strip has a circular cross-section.

3. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in claim 2, characterized in that: There are four grooves and four cable core units. The four cable core units are evenly distributed in the filling layer, and each groove is disposed between any two adjacent cable core units.

4. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in claim 2, characterized in that: The groove opening and the outer surface of the filling layer are smoothly connected.

5. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in claim 1, characterized in that: The anti-torsion strip is made of silicone material.

6. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in any one of claims 1-5, characterized in that: The cable core unit includes a conductor, a fire-resistant layer, and an insulation layer. The fire-resistant layer is disposed outside the conductor, and the insulation layer is disposed outside the fire-resistant layer.

7. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in any one of claims 1-5, characterized in that: The wrapping layer is made of mica tape wound around itself.

8. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in any one of claims 1-5, characterized in that: The inner lining is made of polyvinyl chloride or polyethylene.

9. The cross-linked environmentally friendly anti-torsion low-smoke halogen-free cable as described in any one of claims 1-5, characterized in that: The outer sheath is made of cross-linked polyethylene material.

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