Flame-retardant and tensile shielding power line

Abstract

The utility model relates to the technical field of power transmission, electric signal control and communication transmission, and provides a flame-retardant and tensile shielding power line, which comprises an insulating wire core layer and a shielding tensile layer arranged outside the insulating wire core layer, the shielding tensile layer comprises a copper wire braid layer, an isolation layer, a steel wire braid layer, a second wrapping layer and a sheath layer which are sequentially arranged from inside to outside; and an isolating layer is arranged outside the copper wire braid layer through an extrusion process. According to the utility model, the defects in the prior art are overcome, the design is reasonable, the structure is compact, the irradiation low-smoke halogen-free cross-linked insulating layer, the inorganic flame-retardant paper filling layer and the irradiation low-smoke halogen-free cross-linked sheath layer are adopted, the flame-retardant performance of the cable is enhanced through the change of the structure, the tensile performance of the cable is enhanced through the steel wire braid layer, and the service life of the cable is prolonged. All components in the cable can be stably used for a long time in a special environment, meanwhile, the special performance of an original shielding power line is kept, and the product is suitable for being used in places such as buildings, subways, power plants, railways and automobiles.

Description

Technical Field

[0001] The utility model relates to the technical fields of power transmission, electric signal control and communication transmission, and in particular to a flame-retardant and tensile-resistant shielded power cord. Background Art

[0002] Although the existing shielded power cables can effectively provide signal control to devices in a stable and immobile place, the cable's tensile strength performance is greatly reduced in a frequently moving environment. The cable is damaged by external forces, the insulated core is not protected, and the signal and data transmission are out of control. Therefore, in order to enhance the stability and durability of the shielded power cable in mobile and harsh environments, it is necessary to improve the cable structure so that it can be used in more occasions. To this end, we propose a flame-retardant and tensile-resistant shielded power cable. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies of the prior art, the utility model provides a flame-retardant, tensile-resistant shielded power cord to solve the above-mentioned problems existing in the prior art.

[0005] (II) Technical solution

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a flame retardant, tensile-resistant shielded power cord, comprising an insulating wire core layer and a shielding tensile-resistant layer arranged outside the insulating wire core layer;

[0007] The shielding tensile layer includes a copper wire braided layer, an isolation layer, a steel wire braided layer, a second wrapping layer, and a sheath layer arranged in sequence from the inside to the outside;

[0008] An isolation layer is arranged outside the copper wire braided layer by an extrusion process, a steel wire braided layer is arranged outside the isolation layer, a second wrapping layer is wrapped around the outer wall of the steel wire braided layer, and a sheath layer is arranged outside the second wrapping layer by an extrusion process.

[0009] Furthermore, the copper wire braided layer is braided with copper wires having a diameter of 0.15 mm to 0.20 mm, and the braiding density is not less than 80%, thereby improving the shielding effect.

[0010] Furthermore, the materials of the isolation layer and the sheath layer are both irradiated low-smoke halogen-free cross-linked materials. The sheath layer needs to be irradiated to change the internal molecular structure of the material from a linear structure to a mesh structure to meet the requirement that the conductor operating temperature is 90°, while improving the wear resistance of the sheath layer.

[0011] Furthermore, the steel wire braided layer is braided with steel wires having a diameter of 0.20 mm and a braiding density of not less than 80%, thereby enhancing the tensile strength.

[0012] Furthermore, the second wrapping layer is made of polytetrafluoroethylene tape, which is corrosion-resistant, non-aging, flexible, and has high tensile strength, and tightly wraps the steel wire braided layer inside.

[0013] Furthermore, the insulated wire core layer includes a conductor layer, an insulating layer, a filling layer, and a first wrapping layer which are sequentially arranged from the inside to the outside;

[0014] The first wrapping layer is arranged inside the copper wire braided layer;

[0015] An insulating layer is arranged outside the conductor layer by an extrusion process, and the filling layer is arranged between the insulating layer and the first wrapping layer. The first wrapping layer tightly wraps the conductor layer, the insulating layer and the filling layer together by wrapping.

[0016] Furthermore, the conductor layer is a soft copper structure that complies with the Class 5 structure in GB / T3956.

[0017] Furthermore, the material of the insulating layer is a low-smoke halogen-free radiation cross-linked polyolefin material. The insulating layer needs to be irradiated to change the internal molecular structure of the material from a linear structure to a mesh structure, thereby increasing the normal operating temperature of the conductor from 70° to 90°, thereby improving heat resistance.

[0018] Furthermore, the filling layer is composed of an inorganic paper rope filling material, which is used to fill the cable densely and roundly.

[0019] Furthermore, the material of the first wrapping layer is a non-hygroscopic polyester film material.

[0020] (III) Beneficial effects

[0021] The embodiment of the utility model provides a flame retardant and tensile resistant shielded power cord.

[0022] Beneficial effects:

[0023] Irradiated low-smoke halogen-free cross-linked insulation layer, inorganic flame-retardant paper filling layer, irradiated low-smoke halogen-free cross-linked sheath layer. The change in structure enhances the flame retardant properties of the cable. The steel wire braided layer enhances the tensile properties of the cable. All components in the cable can meet the requirements of stable and long-term use in special environments while maintaining the unique properties of the original shielded power cord. The product is suitable for use in buildings, subways, power plants, railways, automobiles and other places. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional schematic diagram of the overall structure of the utility model;

[0025] In the figure: 1. Conductor layer; 2. Insulation layer; 3. Filling layer; 4. First winding layer; 5. Copper wire braided layer; 6. Isolation layer; 7. Steel wire braided layer; 8. Second winding layer; 9. Sheath layer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Refer to the attached Figure 1 , a flame retardant, tensile-resistant shielded power cord, comprising an insulating wire core layer and a shielding tensile-resistant layer arranged outside the insulating wire core layer;

[0028] The shielding tensile layer includes a copper wire braided layer 5, an isolation layer 6, a steel wire braided layer 7, a second wrapping layer 8, and a sheath layer 9 arranged in sequence from the inside to the outside;

[0029] An isolation layer 6 is provided on the outside of the copper wire braided layer 5 through an extrusion process, a steel wire braided layer 7 is provided on the outside of the isolation layer 6, a second wrapping layer 8 is wrapped around the outer wall of the steel wire braided layer 7, and a sheath layer 9 is provided on the outside of the second wrapping layer 8 through an extrusion process, thereby improving the overall tensile strength of the power cord.

[0030] In this embodiment, the copper wire braided layer 5 is braided with copper wires having a diameter of 0.15 mm to 0.20 mm, and the braiding density is not less than 80%, thereby improving the shielding effect;

[0031] Preferably, the copper wire braided layer 5 is braided with round copper wires with a diameter of 0.15 mm to further enhance the shielding effect.

[0032] In this embodiment, the materials of the isolation layer 6 and the sheath layer 9 are both irradiated low-smoke halogen-free cross-linked materials. The sheath layer 9 needs to be irradiated to change the internal molecular structure of the material (the irradiation belongs to the prior art and is not described in detail in this article), from a linear structure to a mesh structure, so as to adapt to the requirement that the conductor operating temperature is 90°, while improving the wear resistance of the sheath layer 9.

[0033] In this embodiment, the steel wire braided layer 7 is braided with steel wires having a diameter of 0.20 mm and a braiding density of not less than 80%, thereby enhancing the tensile strength.

[0034] In this embodiment, the second wrapping layer 8 is made of polytetrafluoroethylene tape, which is corrosion-resistant, non-aging, flexible, and has high tensile strength, and tightly wraps the steel wire braided layer 7 inside.

[0035] In this embodiment, the insulated wire core layer includes a conductor layer 1, an insulating layer 2, a filling layer 3, and a first wrapping layer 4 arranged in sequence from the inside to the outside;

[0036] The first wrapping layer 4 is arranged inside the copper wire braiding layer 5;

[0037] The conductor layer 1 is provided with an insulating layer 2 on its outside by an extrusion process, the filling layer 3 is provided between the insulating layer 2 and the first wrapping layer 4, and the first wrapping layer 4 wraps the conductor layer 1, the insulating layer 2 and the filling layer 3 tightly together by wrapping;

[0038] The conductor layer 1 is a plurality of wire bundles twisted together.

[0039] In this embodiment, the number of insulating layers 2 is 7, and the outer walls of adjacent insulating layers 2 abut against each other. There are 6 filling layers 3, which are evenly distributed in the gap between the insulating layer 2 and the first winding layer 4. The outer wall of the filling layer 3 abuts against the outer wall of the adjacent insulating layer 2 and the inner wall of the first winding layer 4, thereby improving the strength of the power cord.

[0040] In this embodiment, the conductor layer 1 is a soft copper structure that complies with the fifth type of structure in GB / T3956.

[0041] In this embodiment, the material of the insulating layer 2 is a low-smoke halogen-free radiation cross-linked polyolefin material. The insulating layer 2 needs to be irradiated to change the internal molecular structure of the material from a linear structure to a mesh structure, thereby increasing the normal operating temperature of the conductor from 70° to 90°, thereby improving heat resistance.

[0042] In this embodiment, the filling layer 3 is made of an inorganic paper rope filling material, which is used to fill the cable densely and roundly.

[0043] In this embodiment, the material of the first wrapping layer 4 is a non-hygroscopic polyester film material, which increases heat resistance, toughness and corrosion resistance.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flame-retardant, tensile-resistant shielded power cord, characterized in that: It includes an insulating wire core layer and a shielding tensile layer arranged outside the insulating wire core layer; The shielding tensile layer comprises a copper wire braided layer (5), an isolation layer (6), a steel wire braided layer (7), a second wrapping layer (8), and a sheath layer (9) which are arranged in sequence from the inside to the outside; An isolation layer (6) is provided on the outside of the copper wire braided layer (5) by means of an extrusion process, a steel wire braided layer (7) is provided on the outside of the isolation layer (6), a second wrapping layer (8) is wrapped around the outer wall of the steel wire braided layer (7), and a sheath layer (9) is provided on the outside of the second wrapping layer (8) by means of an extrusion process.

2. The flame-retardant, tensile-resistant shielded power cable according to claim 1, characterized in that: The copper wire braided layer (5) is braided with copper wires having a diameter of 0.15 mm to 0.20 mm, and the braiding density is not less than 80%.

3. The flame-retardant, tensile-resistant shielded power cable according to claim 1, characterized in that: The materials of the isolation layer (6) and the sheath layer (9) are both irradiated low-smoke halogen-free cross-linked materials.

4. The flame-retardant, tensile-resistant shielded power cable according to claim 1, characterized in that: The steel wire braided layer (7) is braided with steel wires having a diameter of 0.20 mm, and the braiding density is not less than 80%.

5. The flame-retardant, tensile-resistant shielded power cable according to claim 1, characterized in that: The second wrapping layer (8) is made of polytetrafluoroethylene tape.

6. The flame-retardant, tensile-resistant shielded power cord according to claim 1, characterized in that: The insulated wire core layer comprises a conductor layer (1), an insulating layer (2), a filling layer (3), and a first wrapping layer (4) which are arranged in sequence from the inside to the outside; The first wrapping layer (4) is arranged inside the copper wire braided layer (5); The conductor layer (1) is provided with an insulating layer (2) on the outside by means of an extrusion process, the filling layer (3) is provided between the insulating layer (2) and the first wrapping layer (4), and the first wrapping layer (4) tightly wraps the conductor layer (1), the insulating layer (2), and the filling layer (3) together by means of wrapping.

7. The flame-retardant, tensile-resistant shielded power cable according to claim 6, characterized in that: The conductor layer (1) is a soft copper structure that complies with the fifth type of structure in GB / T3956.

8. The flame-retardant, tensile-resistant shielded power cord according to claim 6, characterized in that: The material of the insulating layer (2) is a low-smoke, halogen-free, radiation-cross-linked polyolefin material.

9. The flame-retardant, tensile-resistant shielded power cord according to claim 6, characterized in that: The filling layer (3) is made of inorganic paper rope filling material and is used to fill the cable densely and roundly.

10. The flame-retardant, tensile-resistant shielded power cable according to claim 6, characterized in that: The material of the first wrapping layer (4) is a non-hygroscopic polyester film material.

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