High-temperature-resistant heating cable

Abstract

The utility model relates to the technical field of heating cables, in particular to a high-temperature-resistant heating cable which comprises a cable sheath, a cable conductor and an inner sheath, a heating cable breakage-proof structure is arranged on the outer side of the inner sheath, and the heating cable breakage-proof structure comprises a connecting wire, a carbon fiber heating ring and a telescopic cavity. The outer side of the inner sheath is fixedly sleeved with a plurality of carbon fiber heating rings, and the inner sides of the carbon fiber heating rings are fixedly connected with connecting wires. According to the high-temperature-resistant heating cable, the end part of the carbon fiber heating ring passes through the inner sheath through the connecting wire, so that a certain amount of movable controllable space is reserved to reduce the extrusion on the carbon fiber heating ring, and the situation that the sheath of the cable is punctured by the raised position of the carbon fiber is reduced; the cable structure on the inner side can be protected to be intact while heat is transmitted outwards, the telescopic cavity is used for reserving space to reduce damage caused by extrusion, and the using effect of the high-temperature-resistant heating cable is improved.

Description

Technical Field

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

[0002] Heating cables are mainly used for heating in daily life, plant cultivation, pipe insulation, etc. Heating cables are made of single or multiple alloy heating wires as heat sources, high-purity, high-temperature, fused crystalline magnesium oxide as thermal insulators, and seamless continuous stainless steel or copper tubes as sheaths. They are manufactured using special production processes. In the north, the weather is cold in winter, and snow cannot be cleared in time, which is easy to accumulate and increase the load of the load, which is easy to cause harm. In order to avoid these dangers, heating cables are needed for heating to avoid excessive snow and ice accumulation.

[0003] For example, the authorization announcement number "CN219999627U" is named a high-temperature resistant heating cable. Although the heating efficiency is improved by equidistantly arranged heating nodes, and multiple heating nodes are arranged in parallel, the heating nodes are used to achieve cable heating and improve the service life of the cable. However, the existing high-temperature resistant heating cables use carbon fiber heating wires wound on the surface of the silicone rubber sheath, and then the carbon fiber heating wires are connected to the internal conductor. The carbon fiber heating wires are softly wound and will deform along with the heating cable itself when the heating cable is squeezed or pressed by external force. Therefore, the carbon fiber heating wires will often bend during use, and a relatively protruding protrusion will appear at the bending position of the bent carbon fiber. The existing high-temperature resistant heating cables all use an outer protective rubber sheath tightly wrapped around the outside of the carbon fiber heating wire. Therefore, as the heating cable is heated, due to the principle of thermal expansion and contraction, the rubber sheath will expand and squeeze inward. The squeezed sheath is easily punctured and damaged by the bent and protruding carbon fiber heating wire, thereby causing the carbon fiber heating wire to be exposed, which directly affects the use effect of the high-temperature resistant heating cable.

[0004] At the same time, two parallel conductors pass through the interior of the high-temperature resistant heating cable, and a certain current will flow inside the conductors. The distance between two adjacent parallel conductors is relatively small. Therefore, when the high-temperature resistant heating cable is used for a long time, the inner sheath inside the heating cable will age and deform, and the supporting effect of the inner sheath will also decrease. In this way, the two conductors lose their firm supporting force, and the conductors are prone to contact and close to each other, causing short circuits or heat accumulation, the risk of burning and leakage, and greatly reducing the safety of the use of high-temperature resistant heating cables. Utility Model Content

[0005] The utility model aims to solve the problems of poor use effect and unsafe use of high temperature resistant heating cables, and proposes a high temperature resistant heating cable.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature resistant heating cable, comprising a cable sheath, a cable conductor and an inner sheath, the outer side of the inner sheath is provided with a heating cable anti-damage structure, the heating cable anti-damage structure comprises a connecting wire, a carbon fiber heating ring and a telescopic cavity, a plurality of carbon fiber heating rings are fixedly sleeved on the outer side of the inner sheath, a connecting wire is fixedly connected to the inner side of the carbon fiber heating ring, the other ends of the two connecting wires are fixedly connected to the cable conductor, a heating layer is fixedly installed on the outer side of the carbon fiber heating ring, a telescopic cavity is fixedly opened on the outer side of the heating layer, a plurality of pads are fixedly connected to the outer wall of the heating layer, and the outer sides of the plurality of pads are movably connected to the inside of the telescopic cavity.

[0007] Preferably, an insulating layer is fixedly sleeved inside the cable sheath, a protective sleeve is fixedly sleeved inside the insulating layer, and the inner side of the protective sleeve is movably connected to the outside of the telescopic cavity.

[0008] Preferably, the two cable conductors are fixedly connected to the inner side of the inner sheath, and the outer walls of the two cable conductors are fixedly provided with an anti-contact short-circuit structure;

[0009] The anti-contact short circuit structure includes an arc support, a reinforcement block and a partition layer;

[0010] The two partition layers are fixedly sleeved on the outer wall of the cable conductor, two arc supports are fixedly connected to the two sides of the two partition layers, the inner sides of the two arc supports are arranged oppositely, and multiple reinforcement blocks are fixedly installed on the outer walls of the two arc supports.

[0011] Preferably, a plurality of control cores are fixedly sleeved on the inner side of the inner sheath, a plurality of control core conductors are fixedly connected inside the plurality of control cores, and the plurality of control cores are arranged parallel to each other.

[0012] Preferably, a plurality of control cores are fixedly sleeved on the inner side of the inner sheath, a plurality of control core conductors are fixedly connected inside the plurality of control cores, and the plurality of control cores are arranged parallel to each other.

[0013] Preferably, the two cable conductors are arranged parallel to each other, the plurality of spacers are equidistantly arranged circumferentially along the outer side of the inner sheath, and the plurality of carbon fiber heating rings are equidistantly distributed on the outer side of the inner sheath.

[0014] The utility model proposes a high-temperature resistant heating cable, which has the beneficial effect of: the end of the carbon fiber heating ring is passed through the inner sheath through the connecting wire, which also reserves a certain amount of movable controllable space to reduce the extrusion of the carbon fiber heating ring, thereby reducing the situation where the carbon fiber protrusions pierce the cable sheath, and can protect the inner cable structure intact while transmitting heat to the outside, and utilizes the telescopic cavity to reserve space to reduce the damage caused by extrusion, thereby improving the use effect of the high-temperature resistant heating cable.

[0015] The arc support is made of two relatively arranged epoxy resin materials with arcs. The two relatively arc supports are respectively supported on the outside of different cable conductors. In this way, the arc support can separate the two cable conductors to prevent the contact short circuit between the conductors over time. The reinforcement block can increase the compression and tensile strength of the arc support itself, and separates different cable conductors to prevent contact short circuit, thereby improving the safety of high temperature resistant heating cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 A front cross-sectional schematic diagram of

[0018] Figure 3 for Figure 1 A side cross-sectional schematic diagram of

[0019] Figure 4 for Figure 2 Enlarged cross-sectional view of part A in the middle;

[0020] Figure 5 for Figure 2 Enlarged cross-sectional view of part B in the middle;

[0021] Figure 6 for Figure 3 Enlarged schematic diagram of part C in the middle.

[0022] In the figure: 1. cable sheath, 2. cable conductor, 3. inner sheath, 4. heating cable anti-damage structure, 41. connecting wire, 42. carbon fiber heating ring, 43. heating layer, 44. telescopic cavity, 45. pad, 5. anti-contact short circuit structure, 51. arc support, 52. reinforcement block, 53. partition layer, 6. protective cover, 7. insulation layer, 81. control core, 82. control core conductor. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings:

[0024] See also Figure 1-6A high temperature resistant heating cable comprises a cable sheath 1, a cable conductor 2 and an inner sheath 3. A heating cable anti-damage structure 4 is arranged on the outer side of the inner sheath 3. The heating cable anti-damage structure 4 comprises a connecting wire 41, a carbon fiber heating coil 42 and a telescopic cavity 44. A plurality of carbon fiber heating coils 42 are fixedly sleeved on the outer side of the inner sheath 3. The carbon fiber heating coils 42 are made of carbon fiber and bent into a hexagonal frame by metal copper. The carbon fiber heating coils 42 are then wound around the outer side of the frame. The ends of the carbon fiber heating coils 42 pass through the inner sheath 3 through the connecting wire 41 and are connected to the cable conductor 2.

[0025] A connecting wire 41 is fixedly connected to the inner side of the carbon fiber heating coil 42, and the other ends of the two connecting wires 41 are fixedly connected to the cable conductor 2. A heating layer 43 is fixedly installed on the outer side of the carbon fiber heating coil 42, and a telescopic cavity 44 is fixedly opened on the outer side of the heating layer 43. The telescopic cavity 44 is opened outside the heating layer 43. Therefore, when the carbon fiber heating coil 42 is connected to the power supply and starts to generate heat, the increase in heat temperature will cause the heating layer 43 to expand and squeeze outward and inward through the principle of thermal expansion and contraction. The telescopic cavity 44 reserved in advance on the outside provides space for buffering and expansion of the expanded heating layer 43, thereby reserving a certain amount of movable controllable space to reduce the extrusion of the carbon fiber heating coil 42, thereby reducing the situation where the carbon fiber protrusions pierce the cable sheath 1. The outer wall of the heating layer 43 is fixedly connected with a plurality of pads 45, and the pads 45 are made of a plurality of equidistantly distributed rubber protrusions.

[0026] The pads 45 are used to support the telescopic cavity 44 and the internal heating layer 43. The outer sides of the multiple pads 45 are movably connected to the inner side of the telescopic cavity 44. The inner side of the cable sheath 1 is fixedly sleeved with an insulating layer 7. The insulating layer 7 is wrapped with a high-temperature resistant and waterproof insulating metal aluminum foil layer and surrounds the outer side of the protective sleeve 6 to improve the service life of the high-temperature resistant heating cable. The inner side of the insulating layer 7 is fixedly sleeved with a protective sleeve 6. The protective sleeve 6 is made of a strong, wear-resistant and heat-resistant PVC material that can withstand higher temperatures. The protective sleeve 6 surrounds the outer side of the telescopic cavity 44, which can transmit heat to the outside while protecting the inner cable structure intact. The inner side of the protective sleeve 6 is movably connected to the outer side of the telescopic cavity 44.

[0027] The carbon fiber heating coil 42 is made of carbon fiber and bent into a hexagonal frame by metal copper. The carbon fiber heating coil 42 is then wrapped around the outside of the frame. The end of the carbon fiber heating coil 42 passes through the inner sheath 3 through the connecting line 41. The telescopic cavity 44 is opened on the outside of the heating layer 43. Therefore, when the carbon fiber heating coil 42 is connected to the power supply and starts to heat up, the increase in heat temperature will cause the heating layer 43 to expand and squeeze outward and inward through the principle of thermal expansion and contraction. The telescopic cavity 44 reserved in advance on the outside provides buffering and telescopic space for the expanded heating layer 43, which also reserves a certain amount of movable controllable space to reduce the extrusion of the carbon fiber heating coil 42, thereby reducing the situation where the protruding position of the carbon fiber pierces the cable sheath 1. The protective cover 6 is made of strong, wear-resistant and heat-resistant PVC material that can withstand higher temperatures. The protective cover 6 surrounds the outside of the telescopic cavity 44, which can transmit heat to the outside while protecting the inner cable structure intact. The telescopic cavity is used to reserve space to reduce damage caused by extrusion, thereby improving the use effect of the high-temperature resistant heating cable.

[0028] See also Figure 1-6 The two cable conductors 2 are fixedly connected to the inner side of the inner sheath 3. The outer walls of the two cable conductors 2 are fixedly provided with an anti-contact short-circuit structure 5. The anti-contact short-circuit structure 5 includes an arc-shaped support 51, a reinforcement block 52 and a partition layer 53. The two partition layers 53 are fixedly sleeved on the outer wall of the cable conductor 2. The partition layer 53 is made of artificial rubber material. The partition layer 53 is wrapped around the outside of two different cable conductors 2 to play an insulating and isolating effect. Two arc-shaped supports 51 are fixedly connected to the two sides of the two partition layers 53. The inner sides of the two arc-shaped supports 51 are fixedly connected to the inner sides of the two arc-shaped supports 51. The arc supports 51 are arranged oppositely, and are made of two epoxy resin materials with curvatures arranged oppositely. The two opposite arc supports 51 are respectively supported on the outside of different cable conductors 2, so that the arc supports 51 can separate the two cable conductors 2 to prevent the contact and short circuit between the conductors from occurring due to the increase in the use time. The reinforcement blocks 52 are made of a plurality of high-strength nickel-iron alloys connected to the outer walls of the arc supports 51. The reinforcement blocks 52 can improve the compression and tensile strength of the arc supports 51 themselves. A plurality of reinforcement blocks 52 are fixedly installed on the outer walls of the two arc supports 51;

[0029] The partition layer 53 is made of artificial rubber material, and the partition layer 53 is wrapped around the outside of two different cable conductors 2, which can play the role of insulation and partition. The arc support 51 is made of two relatively arranged epoxy resin materials with curvature, and the two relatively arc supports 51 are respectively supported on the outside of different cable conductors 2, so that the arc support 51 can separate the two cable conductors 2 to prevent the contact short circuit between the conductors due to the increase of use time. The reinforcement block 52 is made of a plurality of high-strength nickel-iron alloys connected to the outer wall of the arc support 51. The reinforcement block 52 can improve the compression and tensile strength of the arc support 51 itself, and utilizes the separation between different cable conductors to prevent contact short circuit, thereby improving the safety of high temperature resistant heating cables.

[0030] See also Figure 1-6 A plurality of control cores 81 are fixedly sleeved on the inner side of the inner sheath 3, and a plurality of control core conductors 82 are fixedly connected inside the plurality of control cores 81. The control cores 81 are technical means already available at this stage. The heating cable and the external control device are connected through a plurality of control cores 81 and control core conductors 82 wrapped inside the inner sheath 3. The plurality of control cores 81 are arranged parallel to each other, the inner wall of the protective sheath 6 is movably connected to the outer sides of a plurality of pads 45, the inner side of the heating layer 43 is movably connected to the outer wall of the inner sheath 3, the two cable conductors 2 are arranged parallel to each other, the plurality of pads 45 are equidistantly arranged in a circle along the outer side of the inner sheath 3, and a plurality of carbon fiber heating rings 42 are equidistantly distributed on the outer side of the inner sheath 3.

[0031] Working principle:

[0032] When using high temperature resistant heating cables to install in outdoor houses or locations prone to freezing and snowing for heating work:

[0033] The pressure-resistant and heat-resistant structure of high-temperature resistant heating cable:

[0034] The carbon fiber heating ring 42 is made of carbon fiber and bent into a hexagonal frame by metal copper, and then the carbon fiber heating ring 42 is wrapped around the outside of the frame. The end of the carbon fiber heating ring 42 passes through the inner sheath 3 through the connecting line 41. The telescopic cavity 44 is opened on the outside of the heating layer 43. Therefore, when the carbon fiber heating ring 42 is connected to the power supply and starts to heat up, the increase in heat temperature will cause the heating layer 43 to expand and squeeze to the outside and inside through the principle of thermal expansion and contraction. The telescopic cavity 44 reserved in advance on the outside provides space for buffering and expansion of the expanded heating layer 43, which also reserves a certain amount of movable controllable space to reduce the extrusion of the carbon fiber heating ring 42, thereby reducing the situation where the protruding position of the carbon fiber pierces the cable sheath 1. The protective cover 6 is made of a strong, wear-resistant and heat-resistant PVC material that can withstand higher temperatures. The protective cover 6 surrounds the outside of the telescopic cavity 44, which can transmit heat to the outside while protecting the inner cable structure intact.

[0035] Safety improvement structure of high temperature resistant heating cable:

[0036] The partition layer 53 is made of artificial rubber material, and the partition layer 53 is wrapped around the outside of two different cable conductors 2, which can play the role of insulation and partition. The arc support 51 is made of two relatively arranged epoxy resin materials with arcs. The two relatively arc supports 51 are respectively supported on the outside of different cable conductors 2, so that the arc support 51 can separate the two cable conductors 2 to prevent the occurrence of contact and short circuit between the conductors due to the increase in use time. The reinforcement block 52 is made of a plurality of high-strength nickel-iron alloys connected to the outer wall of the arc support 51. The reinforcement block 52 can improve the compression and tensile strength of the arc support 51 itself.

[0037] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A high temperature resistant heating cable, comprising a cable sheath (1), a cable conductor (2) and an inner sheath (3), characterized in that: A heating cable anti-breakage structure (4) is provided on the outer side of the inner sheath (3), and the heating cable anti-breakage structure (4) comprises a connecting wire (41), a carbon fiber heating coil (42) and a telescopic cavity (44); a plurality of carbon fiber heating coils (42) are fixedly sleeved on the outer side of the inner sheath (3); a connecting wire (41) is fixedly connected to the inner side of the carbon fiber heating coil (42); the other ends of the two connecting wires (41) are fixedly connected to the cable conductor (2); a heating layer (43) is fixedly installed on the outer side of the carbon fiber heating coil (42); a telescopic cavity (44) is fixedly opened on the outer side of the heating layer (43); a plurality of pads (45) are fixedly connected to the outer wall of the heating layer (43); the outer sides of the plurality of pads (45) are movably connected to the inside of the telescopic cavity (44).

2. A high temperature resistant heating cable according to claim 1, characterized in that: An insulating layer (7) is fixedly sleeved inside the cable sheath (1), a protective sleeve (6) is fixedly sleeved inside the insulating layer (7), and the inner side of the protective sleeve (6) is movably connected to the outside of the telescopic cavity (44).

3. A high temperature resistant heating cable according to claim 1, characterized in that: The two cable conductors (2) are fixedly connected to the inner side of the inner sheath (3), and the outer walls of the two cable conductors (2) are fixedly provided with an anti-contact short-circuit structure (5); The anti-contact short circuit structure (5) comprises an arc support (51), a reinforcement block (52) and a partition layer (53); The two partition layers (53) are fixedly sleeved on the outer wall of the cable conductor (2), two arc-shaped supports (51) are fixedly connected to the two sides of the two partition layers (53), the inner sides of the two arc-shaped supports (51) are arranged opposite to each other, and a plurality of reinforcement blocks (52) are fixedly installed on the outer walls of the two arc-shaped supports (51).

4. A high temperature resistant heating cable according to claim 1, characterized in that: A plurality of control cores (81) are fixedly sleeved on the inner side of the inner sheath (3), a plurality of control core conductors (82) are fixedly connected inside the plurality of control cores (81), and the plurality of control cores (81) are arranged parallel to each other.

5. A high temperature resistant heating cable according to claim 2, characterized in that: The inner wall of the protective sleeve (6) is movably connected to the outer sides of the plurality of cushion blocks (45), and the inner side of the heating layer (43) is movably connected to the outer wall of the inner protective sleeve (3).

6. A high temperature resistant heating cable according to claim 1, characterized in that: The two cable conductors (2) are arranged parallel to each other, the plurality of spacers (45) are arranged equidistantly from each other along the outer side of the inner sheath (3), and the plurality of carbon fiber heating rings (42) are distributed equidistantly on the outer side of the inner sheath (3).

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