High-flame-retardant fireproof computer cable

Abstract

The utility model discloses a high flame-retardant fireproof computer cable, which comprises a cable core and an outer sheath wrapped on the outer layer of the cable core, the cable core comprises a plurality of wire cores, and the structure of each wire core comprises a conductor, a first wrapping tape, a sub-shielding layer, a second wrapping tape, a fireproof layer, an insulating layer and a tensile unit. The cable is reasonable in structural design, and has the following beneficial effects: the tensile unit is arranged between the sub-shielding layer and the second wrapping tape, so that the capability of resisting external force of the cable is improved, and the service life of the cable is prolonged; and meanwhile, the fireproof layer and the outer sheath are arranged in the cable for resisting fire, so that the fireproof performance of the cable is improved, and the cable can normally operate for more than 1.5 hours under the flame condition of 950-1000 DEG C.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a highly flame-retardant and fire-resistant computer cable. Background Art

[0002] Highly flame-retardant and fire-resistant computer cables are cables for electrical equipment. They consist of one or more insulated cores surrounded by a shielding layer and a protective layer. The primary function of computer cables is to transmit signals and data between electronic computers and automated instruments and meters. Their excellent shielding and interference resistance effectively prevent external electromagnetic interference and internal crosstalk, ensuring signal integrity and stability. Highly flame-retardant and fire-resistant computer cables are suitable for applications requiring high fire protection. They are widely used in monitoring and control computer systems or automated devices in sectors such as power generation, metallurgy, petroleum, chemical industry, mining, and subways, as well as in general industrial computer applications requiring flame retardancy and fire resistance. In particular, in the power supply circuits of critical facilities such as emergency power supplies, fire pumps, and elevator communication and signaling systems, highly flame-retardant and fire-resistant computer cables ensure continuity of power supply in the event of a fire, ensuring safe evacuation and firefighting. Existing technologies cannot meet this requirement.

[0003] As a new type of cable product, highly flame-retardant and fire-resistant computer cables have broad market demand and development prospects with the development and application of electronic computers and automation technologies. According to statistics, my country requires approximately 100 million kilometers of computer cables annually, but current domestic production capacity can only meet about half of this demand. Therefore, strengthening the research and development and production of computer cables, improving their quality and performance, and meeting market demand are key tasks facing the cable industry. With increased national investment in power, communications, rail transit, and new energy, the demand for and quality requirements for cable products are also increasing. The cable industry must adapt to market changes, accelerate technological innovation and product upgrades, and enhance product added value and competitiveness. Utility Model Content

[0004] The purpose of the utility model is to provide a highly flame-retardant and fire-resistant computer cable to solve the problem of insufficient fire resistance of computer cables in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present utility model provides a highly flame-retardant and fire-resistant computer cable, comprising a cable core and an outer sheath wrapped around the outer layer of the cable core, the cable core comprising a plurality of wire cores, the structure of the wire core being, from the inside to the outside, a conductor, a first wrapping tape, a sub-shielding layer, and a second wrapping tape; the wire core also comprises a fire-resistant layer, an insulating layer, and a tensile unit, the tensile unit being arranged between the sub-shielding layer and the second wrapping tape, and being wrapped and fixed by the second wrapping tape.

[0006] Furthermore, the structure of the outer sheath is, from inside to outside, the third wrapping tape, the overall shielding layer, the tensile component, the inner lining layer, the armor, the fourth wrapping tape, and the outer protective layer.

[0007] Furthermore, the fire-resistant layer and the insulating layer are arranged on the outer layer of the conductor, and the structure of the wire core from the inside to the outside is conductor, fire-resistant layer, insulating layer, first wrapping tape, sub-shielding layer, and second wrapping tape.

[0008] Furthermore, the number of the cores is 7, one of which is arranged at the center of the cable core, and the other 6 cores are arranged around the central core of the cable core.

[0009] Furthermore, the conductor is a copper conductor, which is formed by twisting multiple copper wires; the fire-resistant layer is an overlapping and wrapped synthetic mica tape; the insulating layer is a cross-linked polyolefin insulating layer; and the tensile unit is a steel wire rope tensile body.

[0010] Furthermore, the first wrapping tape is a polyester tape; the sub-shielding layer is a copper wire shield, and the braiding density of the copper wire is ≥80%; and the second wrapping tape is a polyester tape.

[0011] Furthermore, the third wrapping tape is a polyester tape; the overall shielding layer is a copper wire shield, and the braiding density of the copper wire is ≥80%; and the tensile component is a HDPE insulated tensile component.

[0012] Furthermore, the inner lining layer is a halogen-free, low-smoke, flame-retardant thermoplastic polyolefin sheath; the armor is a steel belt armor; the fourth wrapping tape is a low-smoke, halogen-free, highly flame-retardant tape; and the outer protective layer is a silicone rubber sheath.

[0013] Furthermore, the tensile component is a tooth-shaped component, the inner layer of which is a smooth surface, and the outer layer is provided with teeth protruding evenly outward.

[0014] Furthermore, the armor is a double-layer gap-wrapped galvanized steel strip.

[0015] To sum up, the device structure of the present invention is reasonably designed, and the use of the technical solution of the present invention has the following beneficial effects: the present invention is provided with a tensile unit between the sub-shielding layer and the second wrapping tape, which increases the cable's ability to resist external forces and extends the service life of the cable; at the same time, a fire-resistant layer and an outer sheath are provided in the cable for fire resistance, thereby improving the fire resistance of the cable so that the cable can maintain normal operation for more than 1.5 hours under flame conditions of 950-1000°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model highly flame-retardant and fire-resistant computer cable;

[0017] Explanation of the accompanying figures: 1-conductor; 2-fire-resistant layer; 3-insulating layer; 4-tensile unit; 5-first tape; 6-sub-shielding layer; 7-second tape; 8-third tape; 9-total shielding layer; 10-tensile component; 11-inner lining layer; 12-armor; 13-fourth tape; 14-outer protective layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0019] In this utility model, for a clearer description, the following explanation is made: the observer faces the Figure 1 For observation, the left front side of the observer is set as front, the right rear side of the observer is set as rear, the left rear side of the observer is set as left, the right front side of the observer is set as right, the top of the observer is set as top, and the bottom of the observer is set as bottom. It should be noted that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and so on in the text indicate the direction or position relationship based on the direction or position relationship set in the drawings, which is only for the convenience of clearly describing the present invention, and does not indicate or imply that the structure or component referred to must have a specific direction or be constructed in a specific direction. Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarifying or simplifying the description, and cannot be understood as indicating or implying relative importance or quantity.

[0020] See also Figure 1 The utility model provides a highly flame-retardant and fire-resistant computer cable, comprising a cable core and an outer sheath wrapped around the outer layer of the cable core. The cable core comprises a plurality of wire cores, and the structure of the wire core is, from the inside to the outside, a conductor 1, a first wrapping tape 5, a sub-shielding layer 6, and a second wrapping tape 7; the wire core also comprises a fire-resistant layer 2, an insulating layer 3, and a tensile unit 4. The tensile unit 4 is arranged between the sub-shielding layer 6 and the second wrapping tape 7, and is wrapped and fixed by the second wrapping tape 7.

[0021] The present invention provides a tensile strength unit 4 between the sub-shielding layer 6 and the second wrapping tape 7. This unit strengthens the cable's overall structure, improving its ability to withstand external forces and thus extending its service life. The cable also features a fire-resistant layer, allowing it to maintain normal operation for more than 1.5 hours under flame conditions of 950-1000°C.

[0022] As a preferred embodiment of the present invention, the structure of the outer sheath is, from inside to outside, the third wrapping tape 8, the overall shielding layer 9, the tensile component 10, the inner lining layer 11, the armor 12, the fourth wrapping tape 13, and the outer protective layer 14.

[0023] Specifically, the fire-resistant layer 2 and the insulating layer 3 are arranged on the outer layer of the conductor 1, and the structure of the core is conductor 1, fire-resistant layer 2, insulating layer 3, first wrapping tape 5, sub-shielding layer 6, and second wrapping tape 7 from inside to outside.

[0024] Specifically, the number of the cores is 7, one of which is arranged at the center of the cable core, and the other 6 cores are arranged around the central core of the cable core.

[0025] Specifically, the conductor 1 is a copper conductor, which is formed by twisting multiple copper wires; the fire-resistant layer 2 is an overlapping and wrapped synthetic mica tape; the insulating layer 3 is a cross-linked polyolefin insulating layer; and the tensile unit 4 is a steel wire rope tensile body.

[0026] The conductor 1 is formed by twisting multiple copper wires, has good mechanical properties, and can withstand various physical impacts and wear.

[0027] The fire-resistant layer 2 is wrapped with overlapping synthetic mica tapes, which has a high heat resistance level and unique fire-resistant properties. It can reach Class A fire resistance level and can maintain normal operation for more than 1.5 hours under flame conditions of 950-1000℃.

[0028] The insulation layer 3 is made of cross-linked polyolefin insulation material. Cross-linked polyolefin insulation is a new type of environmentally friendly material with the characteristics of high temperature resistance, halogen-free, low smoke, flame retardancy, etc. It has good heat resistance and radiation resistance and a longer service life.

[0029] The tensile unit 4 is a steel wire rope tensile body, which can increase the overall structure of the cable and improve its ability to resist external forces, thereby extending the service life of the cable.

[0030] Specifically, the first wrapping tape 5 is a polyester tape; the sub-shielding layer 6 is a copper wire shield with a braid density of ≥80%; the second wrapping tape 7 is a polyester tape. Specifically, the third wrapping tape 8 is a polyester tape; the overall shielding layer 9 is a copper wire shield with a braid density of ≥80%; and the tensile component 10 is an HDPE insulated tensile component. Specifically, the tensile component 10 is a tooth-shaped component with a smooth inner layer and uniformly protruding teeth on the outer layer.

[0031] The first wrapping tape 5 is made of polyester tape, which effectively isolates and protects the wire core from damage.

[0032] The sub-shielding layer 6 is braided with copper wires, with a braiding density of ≥80%, mainly to prevent interference caused by electrostatic interference, electromagnetic induction and crosstalk induction, and ensure normal operation of system transmission.

[0033] The second wrapping tape 7 is made of polyester tape, which effectively isolates the copper wire shield from damage.

[0034] The third wrapping tape 8 is made of polyester tape to effectively protect the wire core from damage.

[0035] The overall shielding layer 9 is braided with copper wires, with a braiding density of ≥80%, mainly to prevent interference caused by electrostatic interference, electromagnetic induction, and crosstalk induction, and to ensure normal operation of the system transmission.

[0036] The tensile component 10 is made of a toothed component made of HDPE insulation material. Due to its special structural design and material, it has excellent tensile performance. The tensile unit 4 can increase the overall structure of the cable and improve its ability to resist external forces, thereby extending the service life of the cable.

[0037] Specifically, the inner lining 11 is a halogen-free, low-smoke, flame-retardant thermoplastic polyolefin sheath; the armor 12 is a steel tape armor; the fourth wrapping tape 13 is a low-smoke, halogen-free, highly flame-retardant tape; and the outer protective layer 14 is a silicone rubber sheath. Specifically, the armor 12 is a double-layer, gap-wound galvanized steel tape.

[0038] The inner lining layer 11 is made of halogen-free, low-smoke, flame-retardant thermoplastic polyolefin sheath material to effectively protect the cable core from damage by the metal of the armor 12 , which is extruded by machine during production.

[0039] Armor 12 is wrapped with double-layer gaps of galvanized steel tape, which increases the mechanical strength of the cable, improves its corrosion resistance, increases its tensile strength and compressive strength, and the mechanical protection extends its service life.

[0040] The fourth wrapping tape 13 is wrapped with low-smoke halogen-free, highly flame-retardant tape. Low-smoke halogen-free, highly flame-retardant tape is a highly flame-retardant tape that can quickly self-extinguish when exposed to a fire source, effectively curbing the spread of fire and providing flame retardant insulation.

[0041] The outer protective layer 14 is made of silicone rubber sheath material, which has good high temperature resistance, low temperature resistance, weather resistance and insulation performance, good mechanical properties, corrosion resistance and low temperature flexibility, etc., ensuring the normal operation of the cable and extending the service life of the cable.

[0042] The utility model highly flame-retardant and fire-resistant computer cable is mainly composed of a conductor 1, a fire-resistant layer 2, an insulating layer 3, a sub-shielding layer 6, a total shielding layer 9, an armor 12, and tensile components 10. It is suitable for signal transmission of electronic computer systems, monitoring circuits, and automation control systems in lines with an AC frequency of 50Hz and a rated voltage of 300 / 500V, as well as for connecting cables for connection of detection instruments and meters. The sub-shielding layer 6 and the total shielding layer 9 of the cable effectively reduce mutual crosstalk and external interference between circuits, prevent interference caused by static electricity, electromagnetic induction, and crosstalk induction, and ensure the normal operation of system transmission. It can withstand large external mechanical forces, has strong anti-electromagnetic interference capabilities, is highly flame-retardant, and the cable can be directly buried underground. The main features of the utility model cable are as follows:

[0043] 1. High flame retardancy

[0044] It has higher flame retardant properties and can inhibit the spread of flames under certain conditions. The cable can effectively limit the spread of fire in the event of a fire. After the cable leaves the fire source, the flame and residual burns will quickly extinguish, ensuring the safety of electricity use.

[0045] 2. Fire resistance

[0046] The high temperature resistance level is high and can reach Class A fire resistance level (950-1000℃). When the cable encounters a fire, it can protect the conductor from damage, thereby extending the service life of the cable. It has excellent high temperature resistance and combustion resistance and can function in extreme environments.

[0047] 3. Tensile properties

[0048] The tensile unit can increase the overall structure of the cable and improve its ability to resist external forces, thereby extending the service life of the cable.

[0049] 4. Anti-electromagnetic interference

[0050] Highly flame-retardant and fire-resistant computer cables use copper wire braided sub-shield and copper wire braided overall shielding, which can effectively resist electromagnetic interference and ensure stable signal transmission. They have good resistance to electric and magnetic field interference and can effectively prevent interference between adjacent wires. This is especially important for stable information transmission that requires no difference in industrial environments.

[0051] 5. Mechanical protection and corrosion resistance

[0052] The metal sheath of armored computer cable can provide good mechanical protection and resist external physical damage and pressure. This protection is crucial for cables in harsh environments and can extend the service life of the cable. The mechanical protection layer of the armored cable can also improve its corrosion resistance, which is a significant advantage for cables used in environments with more chemicals.

[0053] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A highly flame-retardant and fire-resistant computer cable, comprising a cable core and an outer sheath wrapped around the outer layer of the cable core, characterized in that: The cable core includes several wire cores, and the structure of the wire core from the inside to the outside is a conductor, a first tape, a sub-shielding layer, and a second tape; the wire core also includes a fire-resistant layer, an insulating layer, and a tensile unit. The tensile unit is arranged between the sub-shielding layer and the second tape, and is wrapped and fixed by the second tape.

2. The highly flame-retardant and fire-resistant computer cable according to claim 1, characterized in that: The structure of the outer sheath from inside to outside is the third wrapping tape, the overall shielding layer, the tensile component, the inner lining layer, the armor, the fourth wrapping tape, and the outer protective layer.

3. The highly flame-retardant and fire-resistant computer cable according to claim 2, characterized in that: The fire-resistant layer and the insulating layer are arranged on the outer layer of the conductor, and the structure of the wire core from the inside to the outside is conductor, fire-resistant layer, insulating layer, first wrapping tape, sub-shielding layer, and second wrapping tape.

4. The highly flame-retardant and fire-resistant computer cable according to claim 3, characterized in that: The number of the cores is 7, one of which is arranged at the center of the cable core, and the other 6 cores are arranged around the central core of the cable core.

5. A highly flame-retardant and fire-resistant computer cable according to any one of claims 1 to 4, characterized in that: The conductor is a copper conductor formed by twisting multiple copper wires; the fire-resistant layer is an overlapping and wrapped synthetic mica tape; the insulating layer is a cross-linked polyolefin insulating layer; and the tensile unit is a steel wire rope tensile body.

6. A highly flame-retardant and fire-resistant computer cable according to any one of claims 1 to 4, characterized in that: The first wrapping tape is a polyester tape; the sub-shielding layer is a copper wire shield, and the braiding density of the copper wire is ≥80%; and the second wrapping tape is a polyester tape.

7. A highly flame-retardant and fire-resistant computer cable according to any one of claims 2 to 4, characterized in that: The third wrapping tape is a polyester tape; the overall shielding layer is a copper wire shield, and the braiding density of the copper wire is ≥80%; and the tensile component is an HDPE insulated tensile component.

8. A highly flame-retardant and fire-resistant computer cable according to any one of claims 2 to 4, characterized in that: The inner lining layer is a halogen-free, low-smoke, flame-retardant thermoplastic polyolefin sheath; the armor is a steel belt armor; the fourth wrapping tape is a low-smoke, halogen-free, highly flame-retardant tape; and the outer protective layer is a silicone rubber sheath.

9. The highly flame-retardant and fire-resistant computer cable according to claim 7, characterized in that: The tensile component is a tooth-shaped component, the inner layer of which is a smooth surface and the outer layer is provided with teeth protruding evenly outward.

10. The highly flame-retardant and fire-resistant computer cable according to claim 8, characterized in that: The armor is a double-layer gap-wrapped galvanized steel strip.

Images