Flexible shielding carbon fiber heating cable

Abstract

The utility model relates to a flexible shielding carbon fiber heating cable, which belongs to the technical field of cables, and comprises a cable main body and an outer protective sleeve used for providing protection for the cable main body, the cable main body is formed by winding a plurality of composite resistor cores, the surface of the cable main body is coated with an insulating layer, the surface of each composite resistor core is coated with a shielding layer, and the outer protective sleeve is sleeved with a sheath. The composite resistor core is composed of a plurality of alloy resistance wires and carbon fibers, and the carbon fibers and the alloy resistance wires are arranged in parallel. The heating cable has the effects of improving the safety of the heating cable and prolonging the service life of the heating cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a flexible shielded carbon fiber heating cable. Background Art

[0002] A heating cable is made into a cable structure, uses electricity as energy, and conducts electricity to generate heat by using an alloy resistance wire or a carbon fiber heating element for far-infrared. However, it is found in the actual production process that the heating cable made of alloy resistance wire has a slow heating rate, and is prone to aging and decay problems during the heating process, resulting in a relatively short service life of the heating cable; while the heating cable made of a carbon fiber heating element for far-infrared, due to the poor conductivity of the carbon fiber material, is prone to local overheating of the cable and overall heating of the wire, and the ignition point of the carbon fiber heating element is relatively low, resulting in the situation that the wire is prone to spontaneous combustion when a failure occurs. Content of the Utility Model

[0003] In order to improve the safety of the heating cable and thus extend the service life of the heating cable, the present application provides a flexible shielded carbon fiber heating cable.

[0004] A flexible shielded carbon fiber heating cable provided by the present application adopts the following technical solutions:

[0005] A flexible shielded carbon fiber heating cable includes a cable main body and an outer protective sleeve for providing protection to the cable main body. The cable main body is wound by a plurality of composite resistance cores. An insulating layer is coated on the surface of the cable main body. A shielding layer is coated on the surface of the composite resistance core. The composite resistance core is composed of a plurality of strands of alloy resistance wires and carbon fibers, and the carbon fibers are arranged in parallel with the alloy resistance wires.

[0006] By adopting the above technical solutions, through the setting of the composite resistance core composed of alloy resistance wires and carbon fibers, compared with the heating cable made of alloy resistance wires, the heating rate of the heating cable is accelerated. Compared with the heating cable made of carbon fibers, the situation of local overheating of the heating cable and overall heating of the wire is not easy to occur. The heating cable in the present application takes into account the advantages of the alloy resistance wire heating cable and the carbon fiber heating cable, improves the safety of the heating cable while extending the service life of the heating cable.

[0007] Preferably, conductors are provided at both ends of the cable main body. The conductors at both ends of the cable main body cooperate to supply power to the cable main body. The conductors are coated in the outer protective sleeve, and the diameter of the outer protective sleeve for coating the cable main body gradually increases in the direction towards the conductors.

[0008] By adopting the above technical solution, the wires at both ends of the cable body cooperate to supply power to the cable body. The diameter of the outer protective sleeve of the cable body increases sequentially in the direction towards the wires according to the diameters of the cable body and the wires, which can ensure the protective performance of the outer protective sleeve while reducing production costs.

[0009] Preferably, support rings are sleeved on both the cable body and the wires. The support rings are located on both sides of the connection between the wires and the cable body. The outer wall of the support ring fits with the inner wall of the outer protective sleeve. The support ring is used to provide support for the cable body or the wires.

[0010] By adopting the above technical solution, since the connection between the cable body and the wires is exposed, the support ring can provide support for the cable body or the wires, so that the connection between the cable body and the wires is not easily in contact with the outer protective sleeve, which can improve the service life of the heating cable to a certain extent.

[0011] Preferably, the support ring includes a connecting ring and an inner friction ring. The inner friction ring is arranged in a U shape. A friction fitting groove for fitting the end of the inner friction ring is formed on the side wall of the connecting ring. The inner wall of the inner friction ring fits with the cable body or the wires.

[0012] By adopting the above technical solution, the support ring is formed by buckling the connecting ring and the inner friction ring. The inner friction ring with an appropriate inner diameter is selected to be buckled with the connecting ring, so that the inner wall of the inner friction ring fits with the cable body or the wires. The inner diameter of the support ring can be changed by replacing the inner friction ring, which improves the reliability of providing support for the cable body or the wires through the support ring.

[0013] Preferably, a notch is formed on the inner friction ring.

[0014] By adopting the above technical solution, through the setting of the notch, it is convenient for the installation of the inner friction ring, and there is no displacement relative to the cable body or the wires during the installation process of the inner friction ring.

[0015] Preferably, both the cable body and the outer protective sleeve for covering the cable body are arranged in a spring shape.

[0016] By adopting the above technical solution, the heating cable is used to heat objects. The greater the resistance, the better the heating efficiency. And the resistance of the heating cable is related to the length of the heating cable. Therefore, by arranging both the cable body and the outer protective sleeve for covering the cable body in a spring shape, the length of the cable body can be increased in a limited space, thereby improving the reliability of the heating of the heating cable in this application.

[0017] Preferably, both the outer protective sleeve and the insulating layer are made of fluoroplastics.

[0018] By adopting the above technical solution, fluoroplastics have excellent high-temperature resistance. Because fluoroplastics have a relatively high melting point and glass transition temperature, they are not easily deformed, aged, or softened when used in high-temperature environments. While improving the safety of the heating cable, the service life of the heating cable is extended. In addition, fluoroplastics also have excellent insulation performance and can be used in special environments such as high voltage and high frequency without causing current leakage or dielectric breakdown, further extending the service life of the heating cable.

[0019] Preferably, the shielding layer is made of an aluminum foil coating.

[0020] By adopting the above technical solution, the shielding layer composed of an aluminum foil coating can form a thin film on the outer surface of the composite resistance core, enabling the heating cable to suppress the radiation and interference of electromagnetic waves to a certain extent, thus achieving a shielding effect and extending the service life of the heating cable to a certain extent.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By providing a composite resistance core composed of alloy resistance wires and carbon fibers, compared with a heating cable made of alloy resistance wires, the heating rate of the heating cable is increased. Compared with a heating cable made of carbon fibers, local overheating and overall heating of the wire are less likely to occur. The heating cable in the present application combines the advantages of alloy resistance wire heating cables and carbon fiber heating cables, improving the safety of the heating cable while extending its service life.

[0023] 2. Fluoroplastics have excellent high-temperature resistance. Because fluoroplastics have a relatively high melting point and glass transition temperature, they are not easily deformed, aged, or softened when used in high-temperature environments. While improving the safety of the heating cable, the service life of the heating cable is extended. In addition, fluoroplastics also have excellent insulation performance and can be used in special environments such as high voltage and high frequency without causing current leakage or dielectric breakdown, further extending the service life of the heating cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 is a schematic cross-sectional view of the cable body in an embodiment of the present application.

[0026] Figure 3 is a schematic diagram of the structure at the connection between the cable body and the wire in an embodiment of the present application.

[0027] Description of reference numerals: 1. Cable body; 11. Composite resistance core; 2. Outer protective sleeve; 3. Insulating layer; 4. Shielding layer; 5. Conductive wire; 6. Support ring; 61. Connecting ring; 62. Inner friction ring; 621. Notch; 63. Reducing fitting groove; 64. Friction fitting groove. Detailed implementation mode

[0028] The following will further describe the present utility model in detail with reference to the attached Figures 1-3 drawings.

[0029] An embodiment of the present application discloses a flexible shielded carbon fiber heating cable. Referring to Figure 1 and Figure 2 , it includes a cable body 1 and an outer protective sleeve 2 for protecting the cable body 1. The cable body 1 is wound by a plurality of composite resistance cores 11. An insulating layer 3 is coated on the surface of the cable body 1. Both the outer protective sleeve 2 and the insulating layer 3 are made of fluoroplastics. Fluoroplastics itself is inert and not easy to chemically react with other substances, thus having excellent corrosion resistance; fluoroplastics also has excellent high-temperature resistance. Because fluoroplastics has a high melting point and glass transition temperature, it is not easy to deform, age or soften when used in a high-temperature environment. While improving the safety of the heating cable, it extends the service life of the heating cable; in addition, fluoroplastics has excellent insulation performance and can be used in special environments such as high voltage and high frequency without causing current leakage or dielectric breakdown, further extending the service life of the heating cable. A shielding layer 4 is coated on the surface of the composite resistance core 11. The shielding layer 4 is made of an aluminum foil coating. The shielding layer 4 can form a thin film on the outer layer of the surface of the composite resistance core 11, so that the heating cable can suppress the radiation and interference of electromagnetic waves to a certain extent, thus achieving a shielding effect.

[0030] Referring to Figure 1 and Figure 2 , the composite resistance core 11 is composed of a plurality of alloy resistance wires and carbon fibers. The carbon fibers and the alloy resistance wires are arranged in parallel. The number of the alloy resistance wires and the carbon fibers can vary according to the actual application scenario. Through the setting of the composite resistance core 11 composed of alloy resistance wires and carbon fibers, compared with the heating cable made of alloy resistance wires, the heating rate is accelerated. Compared with the heating cable made of carbon fibers, it is not easy to have local overheating and the overall heating of the cable. The heating cable in the present application combines the advantages of the heating cable made of alloy resistance wires and the heating cable made of carbon fibers, while improving the safety of the heating cable, it extends the service life of the heating cable.

[0031] Referring to Figure 1The cable main body 1 and the outer protective sleeve 2 for covering the cable main body 1 are arranged in a spring shape. The heating cable is used to heat objects. The greater the resistance, the better the heating efficiency. And the size of the resistance of the heating cable is related to the length of the heating cable. Therefore, through the above settings, the length of the cable main body 1 can be increased in a limited space, thereby improving the reliability of the heating of the heating cable in this application.

[0032] Referring to Figure 1 , conductors 5 are provided at both ends of the cable main body 1. The surface of the conductor 5 is easily covered with a shielding layer 4. The conductors 5 at both ends of the cable main body 1 cooperate to supply power to the cable main body 1. The conductor 5 is covered in the outer protective sleeve 2. Since the diameter of the cable main body 1 after covering the shielding layer 4 is still smaller than the diameter of the conductor 5, the diameter of the outer protective sleeve 2 for covering the cable main body 1 increases sequentially in the direction towards the conductor 5. This shape can be achieved by hot stamping, which ensures the protective performance of the outer protective sleeve 2 while reducing production costs.

[0033] Referring to Figure 1 and Figure 3 , during the connection process of the cable main body 1 and the conductor 5, the shielding layer 4 needs to be cut off first, and then the composite resistance core 11 is wound around the core of the conductor 5 and fixed by welding to improve the connection strength between the cable main body 1 and the conductor 5; since the connection part between the cable main body 1 and the conductor 5 is exposed, support rings 6 can be provided on both sides of the connection part between the cable main body 1 and the conductor 5. The support ring 6 is sleeved on the cable main body 1 or the conductor 5, and the outer wall of the support ring 6 is in contact with the inner wall of the outer protective sleeve 2. The support ring 6 is used to provide support for the cable main body 1 or the conductor 5, so that the connection part between the cable main body 1 and the conductor 5 is not easily in contact with the outer protective sleeve 2, which can improve the service life of the heating cable to a certain extent.

[0034] Referring to Figure 3 , the support ring 6 may include a connecting ring 61, a reducing ring, and an inner friction ring 62. The reducing ring and the inner friction ring 62 are both arranged in a U shape. One side of the connecting ring 61 is provided with a reducing fitting groove 63 for fitting the end of the reducing ring, and the other side of the connecting ring 61 is provided with a friction fitting groove 64 for fitting the end of the inner friction ring 62. Then, in the actual use process, a reducing ring with an adapted outer diameter and an inner friction ring 62 with an adapted inner diameter can be selected to be buckled with the connecting ring 61, so that the outer wall of the reducing ring can be attached to the outer protective sleeve, and the inner wall of the inner friction ring 62 can be attached to the cable main body 1 or the conductor 5. The inner and outer diameters of the support ring 6 can be changed by replacing the reducing ring and the inner friction ring 62, which improves the reliability of providing support for the cable main body 1 or the conductor 5 by the support ring 6; in the embodiment of this application, the outer wall of the connecting ring 61 is attached to the inner wall of the outer protective sleeve 2, and there is no need to additionally increase a reducing ring.

[0035] Referring to Figure 3, a notch 621 is formed on the inner friction ring 62. During the installation process of the inner friction ring 62, it can be fixed to the cable body 1 or the wire 5 by a clamping method. Then, the connecting ring 61 is moved into the friction fitting groove 64 at the opening of the inner friction ring 62. The inner friction ring 62 is not prone to displacement relative to the cable body 1 or the wire 5, improving the reliability of providing support for the cable body 1 or the wire 5 through the support ring 6. In addition, it is convenient for the installation of the inner friction ring 62.

[0036] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A flexible shielded carbon fiber heating cable, characterized in that, It includes a cable body (1) and an outer protective sleeve (2) for providing protection to the cable body (1). The cable body (1) is wound by a plurality of composite resistance cores (11). The surface of the cable body (1) is coated with an insulating layer (3). The surface of the composite resistance core (11) is coated with a shielding layer (4). The composite resistance core (11) is composed of a plurality of strands of alloy resistance wires and carbon fibers, and the carbon fibers are arranged in parallel with the alloy resistance wires.

2. The flexible shielding carbon fiber heating cable according to claim 1, characterized in that, Both ends of the cable body (1) are provided with conductors (5). The conductors (5) at both ends of the cable body (1) cooperate to supply power to the cable body (1). The conductors (5) are coated in the outer protective sleeve (2). The diameter of the outer protective sleeve (2) for coating the cable body (1) gradually increases in the direction towards the conductors (5).

3. The flexible shielding carbon fiber heating cable according to claim 2, wherein Support rings (6) are sleeved on both the cable body (1) and the conductors (5). The support rings (6) are located on both sides of the connection between the conductors (5) and the cable body (1). The outer wall of the support ring (6) is in contact with the inner wall of the outer protective sleeve (2). The support ring (6) is used to provide support to the cable body (1) or the conductors (5).

4. The flexible shielding carbon fiber heating cable according to claim 3, characterized in that, The support ring (6) includes a connecting ring (61) and an inner friction ring (62). The inner friction ring (62) is arranged in a U shape. A friction fitting groove (64) for fitting the end of the inner friction ring (62) is formed on the side wall of the connecting ring (61). The inner wall of the inner friction ring (62) is in contact with the cable body (1) or the conductors (5).

5. The flexible shielding carbon fiber heating cable according to claim 4, wherein, A notch (621) is formed on the inner friction ring (62).

6. The flexible shielding carbon fiber heating cable according to claim 1, wherein Both the cable body (1) and the outer protective sleeve (2) for coating the cable body (1) are arranged in a spring shape.

7. The flexible shielding carbon fiber heating cable according to claim 1, characterized in that, Both the outer protective sleeve (2) and the insulating layer (3) are made of fluoroplastic material.

8. The flexible shielding carbon fiber heating cable according to claim 1, characterized in that, The shielding layer (4) is made of an aluminum foil coating.

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