Fluoroplastic insulating high-temperature-resistant fireproof cable

Abstract

The utility model discloses a fluoroplastic insulating high-temperature-resistant fireproof cable, which comprises a cable core, the cable core comprises eight wire cores which are annularly distributed at equal intervals, each wire core is composed of an inner sheath and a conductor, a composite insulating outer layer is wrapped outside the cable core, the composite insulating outer layer is composed of a contact layer, a buffer layer and a reinforcing layer, and the contact layer is wrapped outside the buffer layer. A composite high-temperature-resistant layer is arranged outside the composite insulating outer layer, the composite high-temperature-resistant layer is composed of a high-temperature-resistant base material, a heat reflecting layer and a heat-resistant protective layer, and the composite high-temperature-resistant layer is wrapped with an outer sheath. The problems of cable stability, flame-retardant and fireproof performance, electrical performance, chemical corrosion resistance and large-current transmission capability in a high-temperature environment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a fluoroplastic insulated high temperature resistant and fireproof cable. Background Art

[0002] Fireproof cable, also known as cable with fireproof performance, is a common type of wire and cable. It is mainly divided into two types: fire-resistant cable and flame-retardant cable. Fireproof cable is widely used in crowded places such as buildings, subways, tunnels, high-rise buildings, etc. Its main purpose is to ensure that the power system can still operate normally when a fire occurs, and provide necessary lighting and communication support for personnel evacuation.

[0003] For example, the Chinese authorized patent "A Fireproof Cable" with announcement number CN209571256U includes a conductive cable core and an aluminum foil layer arranged outside the conductive cable core, and aluminum foil, a first flame retardant layer, an elastic buffer layer, a phase change temperature control layer, a second flame retardant layer and a wear-resistant layer are arranged outside the aluminum foil layer in sequence. Through the above scheme, the first flame retardant layer can prevent flame retardancy when the temperature of the aluminum foil rises to avoid the burning of the outer layer structure, and the elastic buffer layer can ensure the flexibility and pressure bearing capacity of the cable; the phase change temperature control layer can undergo phase change after the external temperature or internal temperature rises or decreases, and absorbs and releases heat during the phase change process, so that the cable has a certain temperature self-regulation ability.

[0004] Although the structure of the above-mentioned prior art is protected in a high temperature environment, the cable stability, electrical performance, chemical corrosion resistance and large current transmission capacity are poor, and therefore cannot meet existing needs. In this regard, we propose a fluoroplastic insulated high temperature resistant and fireproof cable. Utility Model Content

[0005] The purpose of the utility model is to provide a fluoroplastic insulated high temperature resistant fireproof cable to solve the problems of poor stability, flame retardant and fireproof performance, electrical performance, chemical corrosion resistance and large current transmission capacity of the cable in a high temperature environment proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fluoroplastic insulated high temperature resistant fireproof cable, comprising a cable core, the cable core comprising eight wire cores equidistantly distributed in a ring shape, the wire core consisting of an inner sheath and a conductor, the outside of the cable core is wrapped with a composite insulating outer layer, the composite insulating outer layer consists of a contact layer, a buffer layer and a reinforcement layer, the outside of the composite insulating outer layer is provided with a composite high temperature resistant layer, the composite high temperature resistant layer consists of a high temperature resistant substrate, a heat reflecting layer and a heat resistant protective layer, and the outside of the composite high temperature resistant layer is wrapped with an outer sheath.

[0007] Preferably, the inner sheath comprises an insulating inner layer and a shielding layer, and the insulating inner layer is extruded and wrapped around the outside of the conductor, and the shielding layer is in a mesh structure, and the shielding layer is evenly woven around the outside of the insulating inner layer.

[0008] Preferably, the conductor is formed by twisting multiple strands of tinned copper wires.

[0009] Preferably, the gap between the cable core and the wire core is filled with filler.

[0010] Preferably, the contact layer is extruded and wrapped around the outside of the cable core, the buffer layer is located outside the contact layer, and the buffer layer and the contact layer are extruded, and the reinforcement layer is located outside the buffer layer, and the buffer layer and the reinforcement layer are extruded.

[0011] Preferably, the high temperature resistant substrate is wrapped around the outside of the reinforcement layer, and the high temperature resistant substrate is adhered and fixed to the reinforcement layer, the heat reflecting layer is coated around the outside of the high temperature resistant substrate, and the heat resistant protective layer is extruded and wrapped around the outside of the heat reflecting layer.

[0012] Preferably, the thickness of the outer sheath is greater than the thickness of the composite insulating outer layer and the composite high temperature resistant layer.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The wire core of the utility model can maintain stable performance at a temperature of up to 200°C, is suitable for high temperature environments, and ensures good electrical conductivity, while the fluoroplastic insulation layer provides excellent electrical insulation performance, good flame retardancy, a small flame diffusion range, and less smoke generation, thereby improving the fire safety of the cable.

[0015] 2. The utility model is provided with a composite insulating outer layer, and the contact layer is made of XLPE material, which can effectively isolate the cable core from the outside world, prevent current leakage, and improve the electrical performance of the cable; the buffer layer is made of rubber-based composite material, which can effectively buffer and disperse the stress and pressure of the outside world on the cable, enhance the mechanical properties of the cable, and extend the service life of the cable; the reinforcement layer is made of fluoroplastics, which can effectively resist erosion and damage from the external environment, improve the environmental resistance of the cable, and ensure that the cable can operate stably under various environmental conditions.

[0016] 3. The utility model is provided with a composite high-temperature resistant layer. Through the combined effect of the inner high-temperature resistant base material and the outer heat-resistant protective layer, the cable can operate stably for a long time in a high-temperature environment, thereby extending the service life of the cable; the middle heat-reflecting layer can effectively reflect external heat sources, reduce the conduction of heat to the inside of the cable, and reduce the safety hazards caused by overheating of the cable; by adjusting the thickness and performance of each layer of material, the composite high-temperature resistant layer can adapt to cable application scenarios with different temperatures and different mechanical strength requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the wire core of the utility model;

[0020] Figure 4 This is a schematic diagram of the composite insulation outer layer structure of the utility model;

[0021] Figure 5 It is a schematic diagram of the composite high temperature resistant layer structure of the utility model.

[0022] In the figure: 1. cable core; 2. wire core; 21. inner sheath; 211. insulating inner layer; 212. shielding layer; 22. conductor; 3. filler; 4. composite insulating outer layer; 41. contact layer; 42. buffer layer; 43. reinforcement layer; 5. composite high temperature resistant layer; 51. high temperature resistant substrate; 52. heat reflecting layer; 53. heat resistant protective layer; 6. outer sheath. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-5 The utility model provides an embodiment: a fluoroplastic insulated high temperature resistant fireproof cable, comprising a cable core 1, the cable core 1 comprising eight ring-shaped and equidistantly distributed wire cores 2, the wire core 2 consisting of an inner sheath 21 and a conductor 22, the cable core 1 is wrapped with a composite insulating outer layer 4 on the outside, the composite insulating outer layer 4 consists of a contact layer 41, a buffer layer 42 and a reinforcement layer 43, a composite high temperature resistant layer 5 is arranged on the outside of the composite insulating outer layer 4, the composite high temperature resistant layer 5 consists of a high temperature resistant substrate 51, a heat reflecting layer 52 and a heat resistant protective layer 53, and the composite high temperature resistant layer 5 is wrapped with an outer sheath 6 on the outside.

[0025] The cable core 1 can maintain stable performance at temperatures up to 200°C and is suitable for high temperature environments, ensuring good electrical conductivity. The composite insulating outer layer 4 can effectively isolate the cable core from the outside world, prevent current leakage, and improve the electrical performance of the cable. The composite high temperature resistant layer 5 can effectively reduce the temperature rise rate of the cable in a high temperature environment, maintain the stability of the internal structure of the cable, and improve the high temperature resistance of the cable.

[0026] See also Figure 3The inner sheath 21 includes an insulating inner layer 211 and a shielding layer 212, and the insulating inner layer 211 is extruded and wrapped on the outside of the conductor 22. The shielding layer 212 has a mesh structure and is evenly woven on the outside of the insulating inner layer 211. The insulating inner layer 211 is extruded from a fluoroplastic insulating material with an oxygen index greater than 30 and a temperature resistance of 200 degrees. The thickness of the insulating layer is 0.3~0.5MM, ensuring that the insulation performance can be maintained stably in a high temperature environment. The shielding layer 212 is a soft metal wire, which is evenly woven on the insulating inner layer by a braiding machine to reduce electromagnetic interference.

[0027] See also Figure 2 and Figure 3 The conductor 22 is made of multiple strands of tinned copper wires twisted together and is led out from a high-purity oxygen-free copper rod, which ensures the electrical conductivity of the cable. The outer diameter of the conductor: The outer diameter of the conductor ranges from 0.4 to 2.0MM, ensuring good electrical conductivity and mechanical strength.

[0028] See also Figure 1 and Figure 2 The gap between the cable core 1 and the wire core 2 is filled with filler 3, which is a natural resin that can effectively isolate the conductor inside the cable from the external environment, prevent current leakage and arc discharge, thereby greatly reducing the risk of equipment failure and accidents, ensuring the stable operation of the cable and maintaining stable performance in high temperature environments. This allows them to withstand the heat generated by the cable when transmitting electricity and prevent the cable from being damaged due to overheating.

[0029] See also Figure 4 The contact layer 41 is extruded and wrapped on the outside of the cable core 1, the buffer layer 42 is located on the outside of the contact layer 41, and the buffer layer 42 and the contact layer 41 are extruded, the reinforcement layer 43 is located on the outside of the buffer layer 42, and the buffer layer 42 and the reinforcement layer 43 are extruded, the contact layer 41 is made of cross-linked polyethylene, which has excellent electrical properties, heat resistance and mechanical properties; the buffer layer 42 is a rubber-based composite material, which mainly buffers and disperses the external stress and pressure on the cable; the reinforcement layer 43 is a fluoroplastic, which has a high chemical stability and chemical corrosion resistance, ensuring that the cable can still maintain stable operation in harsh chemical environments.

[0030] See also Figure 5The high temperature resistant substrate 51 is wrapped around the outside of the reinforcement layer 43, and the high temperature resistant substrate 51 is adhered and fixed to the reinforcement layer 43, the heat reflecting layer 52 is coated on the outside of the high temperature resistant substrate 51, and the heat resistant protective layer 53 is extruded and wrapped around the outside of the heat reflecting layer 52. The high temperature resistant substrate 51 is alumina ceramic, which directly contacts the insulating layer, provides preliminary high temperature protection, and can maintain stable physical and chemical properties under long-term high temperature environment; the heat reflecting layer 52 is a ceramic coating, which effectively reflects external heat sources, reduces the conduction of heat to the inside of the cable, and effectively reduces the surface temperature of the cable, and the thickness of the heat reflecting layer should be thin enough to ensure good heat reflection effect while avoiding increasing the overall diameter of the cable; the heat resistant protective layer 53 is polyimide, which has good heat resistance, weather resistance and chemical stability.

[0031] The thickness of the outer sheath 6 is greater than the thickness of the composite insulation outer layer 4 and the composite high temperature resistant layer 5. The outer sheath 6 is made of fluoroplastic and can maintain stable performance under high temperature conditions. Fluoroplastic has a high limiting oxygen index, which means it is difficult to burn and can effectively prevent the cable from further combustion in a fire. It is inert to all chemicals and solvents and can maintain its excellent performance even under high temperature and pressure.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A fluoroplastic insulated high temperature resistant fireproof cable, comprising a cable core (1), characterized in that: The cable core (1) comprises eight wire cores (2) equidistantly distributed in a ring shape, the wire core (2) comprising an inner sheath (21) and a conductor (22), the outside of the cable core (1) being wrapped with a composite insulating outer layer (4), the composite insulating outer layer (4) being composed of a contact layer (41), a buffer layer (42) and a reinforcement layer (43), the outside of the composite insulating outer layer (4) being provided with a composite high temperature resistant layer (5), the composite high temperature resistant layer (5) being composed of a high temperature resistant base material (51), a heat reflecting layer (52) and a heat resistant protective layer (53), and the outside of the composite high temperature resistant layer (5) being wrapped with an outer sheath (6).

2. A fluoroplastic insulated high temperature resistant fireproof cable according to claim 1, characterized in that: The inner sheath (21) comprises an insulating inner layer (211) and a shielding layer (212), wherein the insulating inner layer (211) is extruded and wrapped around the outside of the conductor (22), the shielding layer (212) is in a mesh structure, and the shielding layer (212) is evenly woven around the outside of the insulating inner layer (211).

3. A fluoroplastic insulated high temperature resistant fireproof cable according to claim 2, characterized in that: The conductor (22) is formed by twisting a plurality of tinned copper wires.

4. A fluoroplastic insulated high temperature resistant fireproof cable according to claim 1, characterized in that: The gap between the cable core (1) and the wire core (2) is filled with a filler (3).

5. A fluoroplastic insulated high temperature resistant fireproof cable according to claim 1, characterized in that: The contact layer (41) is extruded and wrapped around the outside of the cable core (1); the buffer layer (42) is located outside the contact layer (41), and the buffer layer (42) and the contact layer (41) are extruded; and the reinforcement layer (43) is located outside the buffer layer (42), and the buffer layer (42) and the reinforcement layer (43) are extruded.

6. A fluoroplastic insulated high temperature resistant fireproof cable according to claim 1, characterized in that: The high temperature resistant substrate (51) is wrapped around the outside of the reinforcement layer (43), and the high temperature resistant substrate (51) and the reinforcement layer (43) are bonded and fixed, the heat reflection layer (52) is coated around the outside of the high temperature resistant substrate (51), and the heat resistant protective layer (53) is extruded and wrapped around the outside of the heat reflection layer (52).

7. A fluoroplastic insulated high temperature resistant fireproof cable according to claim 1, characterized in that: The thickness of the outer sheath (6) is greater than the thickness of the composite insulating outer layer (4) and the composite high temperature resistant layer (5).

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