A high tensile cable

Abstract

The utility model discloses a kind of high tensile resistance cable, from outside to inside including flame-retardant PVC outer sheath, double aluminium tape armoring layer, PE inner sheath, copper tape shielding layer, elastic support, polyvinyl chloride insulation layer, conductor;Flame-retardant PVC outer sheath is equipped with flexible heat insulation layer between double aluminium tape armoring layer, and the inner wall of flame-retardant PVC outer sheath is evenly distributed with axial reinforcing rib;Axial reinforcing rib and flexible heat insulation layer self-adapting cooperation.The utility model can significantly improve the protection ability and tensile resistance of internal core wire by axial reinforcing rib and two aluminium tape reverse winding.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cable manufacturing field especially relates to a high tensile resistance cable. BACKGROUND

[0002] The existing cable is generally composed of an outer sheath and an internal conductor. However, the tensile resistance and deformation resistance are insufficient after long-term use. The traditional armor layer is mainly single-wire material and is wound in one direction. When stressed, stress concentration easily occurs, which leads to the rupture or loosening of the armor layer. The internal core wire and the insulation layer are easily damaged. At the same time, the outer protective sheath is easily wrinkled or damaged when bent. The structural strength is not high, and it is difficult to adapt to complex environments such as high temperature and humidity. The overall service life is limited.

[0003] Therefore, a cable with high tensile resistance, strong deformation resistance and excellent comprehensive protection performance is provided to meet the use requirements in complex environments. SUMMARY

[0004] The utility model discloses a kind of high tensile resistance cables with stable structure, strong tensile resistance.

[0005] The utility model discloses a kind of high tensile resistance cables, including flame-retardant PVC outer sheath, double aluminum belt armor layer, PE inner sheath, copper band shielding layer, elastic support, polyvinyl chloride insulation layer, conductor from outside to inside;Flexible heat insulation layer is equipped between flame-retardant PVC outer sheath and double aluminum belt armor layer, and the inner wall of flame-retardant PVC outer sheath is uniformly distributed with axial reinforcing rib;Axial reinforcing rib and flexible heat insulation layer are self-adaptive cooperation.

[0006] Preferably, the double aluminum belt armor layer is formed by winding two aluminum belts, and the winding directions of the two aluminum belts are opposite.

[0007] Preferably, the elastic support has a triangular cross section, the elastic support has a receiving cavity in the center, one side of the receiving cavity in the axial direction has a notch, and an aluminum core is installed in the receiving cavity.

[0008] Preferably, the conductor is wrapped by the polyvinyl chloride insulation layer, and the elastic support is placed in the gap between the polyvinyl chloride insulation layer and the copper band shielding layer.

[0009] Preferably, the flexible heat insulation layer is made of polyurethane foam material, and has a thickness of 0.5-1mm.

[0010] Preferably, the axial reinforcing rib has a maximum height of 0.1-0.3mm in cross section.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1. The utility model discloses a double aluminium belt armoring layer, and the cross structure is formed by two opposite winding aluminium belts, which can effectively offset stress concentration, disperse tensile, extrusion or torsion external force, and avoid single aluminium belt fracture; the axial reinforcing rib and the flexible heat insulation layer are embedded and matched, which does not damage the flexibility and guarantees the flatness of the outer sheath, and the axial reinforcing rib can improve the pulling performance of the outer sheath to improve the pulling performance of the overall structure.

[0013] 2. A plurality of aluminium core bodies are arranged in the sheath, and the rigidity support of the internal aluminium core body can significantly enhance the extrusion resistance, bending resistance of the support and the tensile performance of the overall cable. DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the double aluminium belt armoring layer of the utility model.

[0016] Among them, 1 is a flame-retardant PVC outer sheath, 101 is an axial reinforcing rib, 2 is a double aluminium belt armoring layer, 201 is an aluminium belt, 3 is a PE inner sheath, 4 is a copper belt shielding layer, 5 is an elastic support, 501 is a containing cavity, 5011 is a notch, 6 is a polyvinyl chloride insulation layer, 7 is a conductor, 8 is a flexible heat insulation layer, and 9 is an aluminium core body. PREFERRED EMBODIMENT

[0017] The following specific embodiment illustrates the embodiment of the utility model, and the person skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.

[0018] It should be understood that, in the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the utility model product is usually placed, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "suspension" and the like do not mean that the components must be absolutely horizontal or suspended, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0019] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term "arrange", "install", "link", "connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through intermediate medium, can be two element inside intercommunication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model with specific circumstances.

[0020] As Figures 1-2 shown, a kind of high tensile cable, including flame-retardant PVC outer sheath 1, double aluminium tape armoring layer 2, PE inner sheath 3, copper tape shield layer 4, elastic support 5, polyvinyl chloride insulation layer 6, conductor 7 from outside to inside;Flame-retardant PVC outer sheath 1 with double aluminium tape armoring layer 2 between being equipped with flexible thermal barrier 8, and the inner wall of flame-retardant PVC outer sheath 1 evenly distributed with axial reinforcing rib 101;Axial reinforcing rib 101 with flexible thermal barrier 8 self-adapting cooperation.

[0021] As Figure 2 shown, double aluminium tape armoring layer 2 is formed by two aluminium tapes 201 winding, and the winding direction of two aluminium tapes 201 is opposite, and the two aluminium tapes 201 are reversely wound to form cross structure, which can offset the stress concentration problem when winding in single direction;When cable is subjected to tensile, extrusion or external force of distortion, the aluminium tape reversely wound can disperse stress by mutual restraint, avoid single aluminium tape to break or come loose due to unidirectional stress, significantly improve the protection ability of armoring layer to internal core wire.

[0022] As Figure 1 shown, the cross section of elastic support 5 is similar to triangle, and the center of elastic support 5 is provided with accommodating cavity 501, one side of the axial direction of accommodating cavity 501 is provided with notch 5011, and aluminum core 9 is installed in accommodating cavity 501;Elastic support can significantly enhance the extrusion resistance, bending resistance of cable, when cable is subjected to external force impact or heavy load compression, can effectively protect internal core wire and insulation layer from being damaged;At the same time, aluminum core has the characteristics of light weight and high strength, which can not excessively increase the weight of cable, and can improve the structural strength of cable through the synergistic effect of similar triangular elastic support.

[0023] As Figure 1 shown, conductor 7 is wrapped by polyvinyl chloride insulation layer 6, and elastic support 5 is arranged in the gap between polyvinyl chloride insulation layer and copper tape shield layer, and polyvinyl chloride insulation layer prevents conductor from electric leakage, short circuit or interference with other components.

[0024] As Figure 1 shown, flexible thermal barrier 8 is made of polyurethane foam material, and the thickness is 0.5-1mm, and the flexible thermal barrier made of polyurethane foam material has good elasticity and buffering property, which can provide moderate flexibility to adapt to cable bending.

[0025] As shown in Figure 1 The maximum height of the axial reinforcing rib 101 is 0.1-0.3mm, and the height of the axial reinforcing rib is limited to 0.1-0.3mm, which can ensure the flatness of the outer wall of the flame-retardant PVC outer sheath without destroying the overall flexibility of the inner flexible thermal insulation layer and without deformation and the like after being embedded in the inner flexible thermal insulation layer.

[0026] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the concept and scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design concept of the present application shall fall within the protection scope of the present application, and the technical content claimed by the present application has been fully recorded in the claims.

Claims

1. A high tensile strength cable, characterized in that, From the outside in, it includes a flame-retardant PVC outer sheath, a double aluminum strip armor layer, a PE inner sheath, a copper strip shielding layer, an elastic support component, a polyvinyl chloride insulation layer, and a conductor; a flexible heat insulation layer is provided between the flame-retardant PVC outer sheath and the double aluminum strip armor layer, and axial reinforcing ribs are evenly distributed on the inner wall of the flame-retardant PVC outer sheath; the axial reinforcing ribs and the flexible heat insulation layer are adaptively matched.

2. The high tensile strength cable according to claim 1, characterized in that, The double aluminum strip armor layer is formed by winding two aluminum strips in opposite directions.

3. The high tensile strength cable according to claim 1, characterized in that, The elastic support has a triangular cross-section and a cavity at its center. The cavity has a notch on one axial side and an aluminum core is installed inside the cavity.

4. A high tensile strength cable according to claim 1, characterized in that, The conductor is wrapped with a polyvinyl chloride insulation layer, and the elastic support is placed in the gap between the polyvinyl chloride insulation layer and the copper strip shielding layer.

5. A high tensile strength cable according to claim 1, characterized in that, The flexible insulation layer is made of polyurethane foam material with a thickness of 0.5-1mm.

6. A high tensile strength cable according to claim 1, characterized in that, The maximum height of the cross-section of the axial stiffener is 0.1-0.3 mm.

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