A low-temperature deformation-resistant heat tracing cable

Abstract

This utility model discloses a low-temperature deformation-resistant heat tracing cable, relating to the field of heat tracing cable technology. It includes a cable body comprising a heating core, which is circular and consists of two sets of heating cores. A conductive core is disposed between the two sets of heating cores, and a fixing sleeve covers the outer wall of the heating core. In this utility model, when the cable body is in operation, the heating core heats up due to energization. As the heat dissipates from the heating core, it gradually diffuses to the outside of the cable body, causing the entire cable body to heat up and thus heat pipes or tanks. During this process, the pressure-resistant sleeve provides pressure protection for the cable body. When the cable body is under pressure, the pressure-resistant sleeve uses its own elasticity to offset part of the pressure, reducing the impact of pressure on the heating core inside the cable body and preventing damage to the heating core. The insulating sleeve provides insulation to prevent leakage caused by pressure damage inside the cable body. The fixing sleeve facilitates the fixation of the heating core, ensuring stable heating after the heating core receives current.

Description

Technical Field

[0001] This utility model relates to the field of heat tracing cable technology, and in particular to a low-temperature deformation-resistant heat tracing cable. Background Technology

[0002] Heat tracing cables are energy-saving heating devices that use electrical energy to generate heat to maintain the temperature of flowing media in pipelines or storage tanks. They are widely used in processes such as petrochemicals, food processing, and pharmaceuticals that require maintaining the temperature of the medium. They are especially suitable for pipeline heat tracing and tank insulation. Compared with traditional steam or hot water heat tracing, heat tracing cables are more efficient and environmentally friendly. They do not produce greenhouse gases such as carbon dioxide during operation. Furthermore, the temperature of the heat tracing cable can be adjusted as needed to achieve different temperatures, making temperature regulation more sensitive. They do not need to be replaced during long-term operation and do not lose a large amount of heat to hot water or steam during heat tracing, thus avoiding heat waste. Finally, heat tracing cables have a long service life and are more convenient to use.

[0003] However, existing heat tracing cables have certain shortcomings:

[0004] First, since heat tracing cables are usually attached to the outer wall of pipes or tanks and are directly exposed to the air, if they are subjected to external pressure or other pressure, the cables will be damaged by pressure, affecting the heat tracing. Furthermore, if they are damaged by pressure, they are prone to leakage, causing the current to be conducted through the metal pipes.

[0005] Secondly, existing heat tracing cables are subject to large temperature variations during operation. Over time, the outer wall of the cable is prone to aging and damage, causing the cable to malfunction. Utility Model Content

[0006] The purpose of this application is to provide a low-temperature deformation-resistant heat tracing cable to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: a low-temperature deformation-resistant heat tracing cable, comprising a cable body, the cable body including a heating core, the heating core being circular, two sets of heating cores, a conductive core disposed between the two sets of heating cores, a fixing sleeve covering the outer wall of the heating core, a pressure-resistant sleeve disposed on the outer wall of the fixing sleeve, the fixing sleeve being adapted to the heating core and the conductive core, the pressure-resistant sleeve being adapted to the fixing sleeve, the fixing sleeve being made of insulating silicone material, the pressure-resistant sleeve being made of nitrile rubber material, the thickness of the pressure-resistant sleeve being greater than the thickness of the fixing sleeve, an insulating sleeve covering the outer wall of the pressure-resistant sleeve, the insulating sleeve being adapted to the pressure-resistant sleeve, the thickness of the insulating sleeve being less than the thickness of the pressure-resistant sleeve, the insulating sleeve being made of insulating rubber material.

[0008] Preferably, the insulating sleeve is provided with a reinforcing layer on the outside, and an explosion-proof layer is provided on the outside of the reinforcing layer. The reinforcing layer, the explosion-proof layer, and the insulating sleeve are compatible with each other, and the reinforcing layer, the explosion-proof layer, and the insulating sleeve have the same thickness.

[0009] Preferably, the outer walls of the fixing sleeve, the pressure-resistant sleeve, the insulating sleeve, and the reinforcing layer are all provided with equally spaced heat-conducting holes, which are adapted to the fixing sleeve, the pressure-resistant sleeve, the insulating sleeve, and the reinforcing layer, respectively, and the heat-conducting holes of the fixing sleeve, the pressure-resistant sleeve, the insulating sleeve, and the reinforcing layer correspond to each other.

[0010] Preferably, the explosion-proof layer is a fiberglass woven layer, and the reinforcing layer is an EPDM rubber layer.

[0011] Preferably, the outer wall of the explosion-proof layer is covered with a wear-resistant layer, the wear-resistant layer is compatible with the explosion-proof layer, the wear-resistant layer is made of styrene-butadiene rubber, and the outer wall of the wear-resistant layer is wrapped with a nylon fiber mesh compatible with it.

[0012] Preferably, the cable body is provided with a connection end at both ends, and the outer wall of the connection end is provided with a power supply busbar adapted to it at both ends.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] 1. In this utility model, when the cable body is working, the heating core heats up due to the power supply, and the conductive core conducts the current, so that the two heating cores heat up simultaneously. As the heat dissipated by the heating core gradually diffuses to the outside of the cable body, the entire cable body begins to heat up, thereby providing heat tracing for pipes or tanks. During this process, the pressure-resistant sleeve inside the cable body provides pressure protection for the cable body. When the cable body is under pressure, the pressure-resistant sleeve offsets part of the pressure through its own elasticity, reducing the impact of pressure on the heating core inside the cable body and preventing damage to the heating core. The insulating sleeve provides insulation to prevent leakage caused by pressure damage inside the cable body. The fixing sleeve facilitates the fixing of the heating core, ensuring that the heating core heats up stably after receiving current.

[0015] 2. In this utility model, during the operation of the cable body, the reinforcing layer further strengthens the internal insulating sleeve, pressure-resistant sleeve, and other components, enhancing their protective and pressure-resistant performance. The explosion-proof layer binds and wraps the cable outer sheath through a glass fiber braided layer, enhancing tensile and bending performance and preventing cable cracking. The heat-conducting holes facilitate the rapid transfer of heat from the heating core to the outside of the cable for heat tracing, preventing the fixing sleeve, pressure-resistant sleeve, insulating sleeve, and reinforcing layer from blocking heat. The wear-resistant layer protects the cable body, improving the wear resistance of the outer wall of the cable body and preventing external wear of the cable body during long-term operation. The nylon fiber mesh further improves the wear resistance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main body's external structure in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the internal structure of the cable body in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the connection end structure in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the reinforcing layer and explosion-proof layer structure in the embodiments of this application.

[0021] In the diagram: 1. Cable body; 2. Heating core; 3. Conductive core; 4. Fixing sleeve; 5. Pressure-resistant sleeve; 6. Insulating sleeve; 7. Reinforcing layer; 8. Explosion-proof layer; 9. Heat-conducting hole; 10. Wear-resistant layer; 11. Connection end; 12. Power supply busbar. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Reference Figure 1-4 The low-temperature deformation-resistant heat tracing cable shown includes a cable body 1, which includes a heating core 2. The heating core 2 is circular and there are two sets of heating cores 2. A conductive core 3 is arranged between the two sets of heating cores 2. The outer wall of the heating core 2 is covered with a fixing sleeve 4. A pressure-resistant sleeve 5 is arranged on the outer wall of the fixing sleeve 4. The fixing sleeve 4 is adapted to the heating core 2 and the conductive core 3. The pressure-resistant sleeve 5 is adapted to the fixing sleeve 4. The fixing sleeve 4 is made of insulating silicone, and the pressure-resistant sleeve 5 is made of nitrile rubber. The thickness of the pressure-resistant sleeve 5 is greater than the thickness of the fixing sleeve 4. An insulating sleeve 6 is covered on the outer wall of the pressure-resistant sleeve 5. The insulating sleeve 6 is adapted to the pressure-resistant sleeve 5. The thickness of the insulating sleeve 6 is less than the thickness of the pressure-resistant sleeve 5. The insulating sleeve 6 is made of insulating rubber. Both ends of the cable body 1 are provided with a connecting end 11. Both ends of the outer wall of the connecting end 11 are provided with a power supply busbar 12 adapted to it.

[0024] With the above structure: when the cable body 1 is working, the heating core 2 heats up due to the power supply, and the conductive core 3 conducts the current, so that the two heating cores 2 heat up simultaneously. As the heat dissipated by the heating core 2 gradually diffuses to the outside of the cable body 1, the entire cable body 1 begins to heat up, thereby providing heat tracing for pipes or tanks. During this process, the pressure-resistant sleeve 5 inside the cable body 1 provides pressure-resistant protection for the cable body 1. When the cable body 1 is under pressure, the pressure-resistant sleeve 5 offsets part of the pressure through its own elasticity, reducing the impact of pressure on the heating core 2 inside the cable body 1 and preventing damage to the heating core 2. The insulating sleeve 6 provides insulation to prevent leakage caused by damage to the inside of the cable body 1 due to pressure. The fixing sleeve 4 facilitates the fixing of the heating core 2, ensuring that the heating core 2 heats up stably after receiving current.

[0025] like Figure 4 As shown, an insulating sleeve 6 is provided with a reinforcing layer 7 outside, and an explosion-proof layer 8 is provided outside the reinforcing layer 7. The reinforcing layer 7, the explosion-proof layer 8, and the insulating sleeve 6 are compatible with each other. The reinforcing layer 7, the explosion-proof layer 8, and the insulating sleeve 6 have the same thickness. The explosion-proof layer 8 is a glass fiber braided layer, and the reinforcing layer 7 is a EPDM rubber layer. During the operation of the cable body 1, the reinforcing layer 7 further strengthens the internal components such as the insulating sleeve 6 and the pressure-resistant sleeve 5, enhancing their protective and pressure-resistant performance. The explosion-proof layer 8 binds and wraps the cable outer sheath through the glass fiber braided layer, enhancing its tensile and bending performance and preventing the cable from cracking.

[0026] like Figure 4 As shown, the outer walls of the fixing sleeve 4, the pressure-resistant sleeve 5, the insulating sleeve 6, and the reinforcing layer 7 are all provided with heat-conducting holes 9 distributed at equal intervals. The heat-conducting holes 9 are adapted to the fixing sleeve 4, the pressure-resistant sleeve 5, the insulating sleeve 6, and the reinforcing layer 7, respectively. The heat-conducting holes 9 of the fixing sleeve 4, the pressure-resistant sleeve 5, the insulating sleeve 6, and the reinforcing layer 7 correspond to each other. The heat-conducting holes 9 facilitate the heating core 2 to quickly transfer heat to the outside of the cable for heat tracing, and prevent the fixing sleeve 4, the pressure-resistant sleeve 5, the insulating sleeve 6, and the reinforcing layer 7 from blocking the heat.

[0027] like Figure 4 As shown, the outer wall of the explosion-proof layer 8 is covered with a wear-resistant layer 10, which is compatible with the explosion-proof layer 8. The wear-resistant layer 10 is made of styrene-butadiene rubber, and a nylon fiber mesh compatible with it is wrapped around the outer wall of the wear-resistant layer 10. The wear-resistant layer 10 protects the cable body 1, improves the wear resistance of the outer wall of the cable body 1, and prevents the cable body 1 from being worn on the outside during long-term operation. The nylon fiber mesh further improves the wear resistance.

[0028] The working principle of this practical application is as follows:

[0029] When the cable body 1 is working, the heating core 2 heats up due to the power supply, and the conductive core 3 conducts the current, so that the two heating cores 2 heat up simultaneously. As the heat dissipated by the heating core 2 gradually diffuses to the outside of the cable body 1, the entire cable body 1 begins to heat up, thereby providing heat tracing for pipes or tanks. During this process, the pressure-resistant sleeve 5 inside the cable body 1 provides pressure-resistant protection for the cable body 1. When the cable body 1 is under pressure, the pressure-resistant sleeve 5 offsets part of the pressure through its own elasticity, reducing the impact of pressure on the heating core 2 inside the cable body 1 and preventing damage to the heating core 2. The insulating sleeve 6 provides insulation to prevent leakage caused by damage inside the cable body 1 due to pressure. The fixing sleeve 4 facilitates the fixing of the heating core 2, ensuring that the heating core 2 heats up stably after receiving current.

[0030] During the operation of the cable body 1, the reinforcing layer 7 further strengthens the internal components such as the insulating sleeve 6 and the pressure-resistant sleeve 5, enhancing their protective and pressure-resistant properties. The explosion-proof layer 8 binds and wraps the cable outer sheath through the glass fiber braided layer, enhancing tensile and bending properties and preventing cable cracking. The heat conduction hole 9 facilitates the rapid transfer of heat from the heating core 2 to the outside of the cable for heat tracing, preventing the fixing sleeve 4, pressure-resistant sleeve 5, insulating sleeve 6, and reinforcing layer 7 from blocking heat. The wear-resistant layer 10 protects the cable body 1, improving the wear resistance of the outer wall of the cable body 1 and preventing external wear of the cable body 1 during long-term operation. The nylon fiber mesh further improves the wear resistance.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low temperature resistant deformation heat tracing cable comprising a cable body (1), characterized in that: The cable body (1) includes a heating core (2), which is circular. There are two sets of heating cores (2), and a conductive core (3) is provided between the two sets of heating cores (2). The outer wall of the heating core (2) is covered with a fixing sleeve (4), and the outer wall of the fixing sleeve (4) is provided with a pressure-resistant sleeve (5). The fixing sleeve (4) is adapted to the heating core (2) and the conductive core (3), and the pressure-resistant sleeve (5) is adapted to the fixing sleeve (4). The fixing sleeve (4) is made of insulating silicone, and the pressure-resistant sleeve (5) is made of nitrile rubber. The thickness of the pressure-resistant sleeve (5) is greater than the thickness of the fixing sleeve (4). The outer wall of the pressure-resistant sleeve (5) is covered with an insulating sleeve (6), which is adapted to the pressure-resistant sleeve (5). The thickness of the insulating sleeve (6) is less than the thickness of the pressure-resistant sleeve (5), and the insulating sleeve (6) is made of insulating rubber.

2. A cryogenic resistant, shape-stable heat trace cable according to claim 1, wherein: The insulating sleeve (6) is provided with a reinforcing layer (7) on the outside, and an explosion-proof layer (8) is provided on the outside of the reinforcing layer (7). The reinforcing layer (7), the explosion-proof layer (8), and the insulating sleeve (6) are compatible with each other, and the reinforcing layer (7), the explosion-proof layer (8), and the insulating sleeve (6) have the same thickness.

3. A cryogenic resistant shape-stable heat trace cable according to claim 2, wherein: The outer walls of the fixed sleeve (4), the pressure-resistant sleeve (5), the insulating sleeve (6), and the reinforcing layer (7) are all provided with heat-conducting holes (9) distributed at equal intervals. The heat-conducting holes (9) are adapted to the fixed sleeve (4), the pressure-resistant sleeve (5), the insulating sleeve (6), and the reinforcing layer (7), respectively. The heat-conducting holes (9) of the fixed sleeve (4), the pressure-resistant sleeve (5), the insulating sleeve (6), and the reinforcing layer (7) correspond to each other.

4. A cryogenic resistant, shape stable heat trace cable according to claim 2, wherein: The explosion-proof layer (8) is a glass fiber woven layer, and the reinforcing layer (7) is a EPDM rubber layer.

5. A cryogenic resistant shape-stable heat trace cable according to claim 2, wherein: The outer wall of the explosion-proof layer (8) is covered with a wear-resistant layer (10), which is compatible with the explosion-proof layer (8). The wear-resistant layer (10) is made of styrene-butadiene rubber, and the outer wall of the wear-resistant layer (10) is wrapped with a nylon fiber mesh compatible with it.

6. A cryogenic resistant shape-stable heat trace cable according to claim 1, wherein: The cable body (1) is provided with a connection end (11) at both ends, and the outer walls of the connection end (11) are provided with a power supply bus (12) that is compatible with it.

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