High-stability armored heating cable

Abstract

The invention relates to the technical field of armored heating cables, and provides a high-stability armored heating cable which comprises a heating wire and an insulating sleeve which is arranged outside the heating wire and forms an insulating wire core. When the positioning sleeve absorbs heat, heat energy can be guided into the heat storage cavity through the heat conduction rod, so that the expansion material is promoted to expand, the plug plate is pushed to enable cooling liquid to flow to the water flow groove for cooling, and the armored heating cable is prevented from losing efficacy at the extreme temperature; through the spiral water flow grooves, the contact area of cooling liquid and the positioning sleeve can be increased, turbulent flow is increased, the flowing uniformity is improved, and the heat exchange efficiency is improved; the temperature is reduced through the heat absorption dissolution reaction, the spare inner balloon is further arranged in the fractured micro balloon, and the cooling effect continues to be provided or the same time double cooling effect is achieved when the temperature rises next time; the insulating wire cores can be stabilized, the overall structural stability of the cable is improved, meanwhile, the excellent heat conduction performance is provided, and the stability and safety of the electrical performance are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of armored heating cables, and in particular to a high-stability armored heating cable. Background Art

[0002] Armored heating cable is an electric heating device widely used in environments that require long-term stable heating. Existing armored heating cables are usually composed of a conductor, an insulation layer, and an outer metal armor layer. However, these cables face significant safety hazards when encountering extreme working environment temperatures. Specifically, at excessively high working temperatures, the insulating material will gradually lose its important insulating properties, which may eventually cause the insulation layer to melt. In this case, the conductor inside the cable may directly contact the outside world, causing an electrical short circuit and causing damage to the cable itself. What's more serious is that sparks caused by electrical short circuits may cause fires, posing great safety risks to users and the surrounding environment. Therefore, how to effectively improve the stability and safety of armored heating cables in extreme temperature environments has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a high-stability armored heating cable to solve the technical problems mentioned in the above background technology.

[0004] The technical solution of the present invention is as follows: a high-stability armored heating cable, comprising a heating wire and an insulating sheath arranged outside the heating wire and forming an insulating core, a cable-forming tightening tie is arranged outside the insulating core, a metal armor is arranged outside the cable-forming tightening tie, an inner sheath is arranged outside the metal armor, and an outer sheath is arranged outside the inner sheath;

[0005] And, a support component is arranged outside the insulating core to support and fix it and promote heat conduction, and a protection component is arranged on the support component to cool down the insulating core when it is overheated.

[0006] Preferably, the support assembly includes a positioning sleeve which is sleeved on the outside of the insulating wire core, a triangular support plate is fixed to the outside of the positioning sleeve, a fastening frame is fixed to the side of the triangular support plate, a retaining plate is fixed to one end of the triangular support plate away from the fastening frame, and the outer wall of the retaining plate is in contact with the inner wall of the cabling tightening tie.

[0007] Preferably, the material of the support assembly includes but is not limited to metal material, wherein the inner wall of the positioning sleeve is provided with a plurality of grooves for increasing the heat conduction area.

[0008] Preferably, the protective component includes a temperature measuring cylinder arranged outside the positioning sleeve, a plug plate is provided inside the temperature measuring cylinder, a transmission pipe is fixedly connected to the outside of the temperature measuring cylinder, a water flow groove is opened inside the positioning sleeve, and one end of the transmission pipe away from the temperature measuring cylinder passes through the inner wall of the positioning sleeve and is connected to the inside of the water flow groove.

[0009] Preferably, the interior of the temperature measuring cylinder forms a hot chamber and a cold chamber through a plug plate, the interior of the cold chamber is filled with coolant, and the interior of the hot chamber is provided with a power component for pushing the plug plate to move in a directional manner and allowing the coolant to flow to the water flow trough through a transmission pipe.

[0010] Preferably, the power assembly includes a heat-conducting isolation ring fixed inside the heat cavity, the interior of the heat cavity forms a heat storage cavity and an installation cavity through the heat-conducting isolation ring, a heat-conducting rod is fixed to the outer wall of the temperature measuring tube, one end of the heat-conducting rod passes through the inner wall of the temperature measuring tube and extends to the interior of the heat storage cavity, the other end of the heat-conducting rod is fixed to the outer wall of the positioning sleeve, and an expansive material is fixed to the interior of the installation cavity, and one end of the expansive material is fixed to one side of the plug plate.

[0011] Preferably, a micro-balloon is arranged inside the coolant, an inner balloon is arranged inside the micro-balloon, and the interiors of the micro-balloon and the inner balloon are both filled with ammonium chloride powder.

[0012] Preferably, the internal structure of the water flow groove is spiral, and the water flow groove is not connected to the plurality of grooves.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The positioning sleeve of the present invention can absorb heat and introduce heat energy into the heat storage chamber through the heat-conducting rod, which makes the expansive material expand and pushes the plug plate to make the coolant flow to the water flow groove for cooling, thus preventing the armored heating cable from failing under extreme temperatures. When the temperature returns to normal, the expansive material recovers and absorbs the coolant back, thus ensuring the stability, safety and reliability of the cable in harsh environments.

[0015] 2. The present invention can increase the contact area between the coolant and the positioning sleeve, increase the occurrence of turbulence, improve flow uniformity and increase heat exchange efficiency through the spiral water flow groove, thereby significantly enhancing the cooling effect.

[0016] 3. The present invention can automatically trigger a cooling reaction when the temperature of the coolant rises, which is energy-saving and efficient. The temperature is lowered by an endothermic dissolution reaction. A spare inner balloon is also provided in the ruptured micro-balloon to continue to provide a cooling effect or double the cooling effect the next time the temperature rises.

[0017] 4. The present invention can stabilize the insulating core and improve the overall structural stability of the cable, preventing the cable from loosening under external force or temperature changes. At the same time, it provides excellent thermal conductivity, further increases the heat conduction area, effectively reduces the temperature of the heating part of the cable, and ensures the stability and safety of the electrical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the plane structure proposed by the present invention;

[0020] Figure 2 A schematic diagram of the three-dimensional structure proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the support assembly structure proposed by the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the temperature measuring tube proposed by the present invention;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the positioning sleeve proposed by the present invention;

[0024] Figure 6 This is a schematic diagram of the cross-sectional planar structure of the micro-balloon proposed by the present invention.

[0025] In the figure: 1. heating wire; 2. insulating sleeve; 3. cabling tie; 4. metal armor; 5. inner sheath; 6. outer sheath; 7. support assembly; 71. positioning sleeve; 711. groove; 72. triangular support plate; 73. retaining plate; 74. fastening frame; 8. protection assembly; 81. temperature measuring tube; 82. heat conducting rod; 83. heat conducting isolation ring; 84. micro balloon; 841. ammonium chloride powder; 842. inner balloon; 85. expansive material; 86. plug plate; 87. coolant; 88. transmission pipe; 89. water flow trough. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] Armored heating cables are a type of electric heating equipment widely used in environments that require long-term stable heating. Existing armored heating cables are usually composed of a conductor, an insulation layer, and an outer metal armor layer. However, these cables face significant safety hazards when encountering extreme operating environment temperatures. Specifically, under excessively high operating temperatures, the insulation material will gradually lose its important insulating properties, and may eventually cause the insulation layer to melt. In this case, the conductor inside the cable may directly contact the outside world, causing an electrical short circuit, resulting in damage to the cable itself. More seriously, sparks caused by electrical short circuits may cause fires, posing great safety risks to users and the surrounding environment. Please refer to Figure 1-Figure 6 This embodiment provides a high-stability armored heating cable, including a heating wire 1 and an insulating sleeve 2 arranged on the outside of the heating wire 1 and forming an insulating core, a cabling tie 3 is arranged on the outside of the insulating core, a metal armor 4 is arranged on the outside of the cabling tie 3, an inner sheath 5 is arranged on the outside of the metal armor 4, and an outer sheath 6 is arranged on the outside of the inner sheath 5. The heating wire 1 is the core part of the heating cable and is responsible for generating heat. The heating wire is made of a high-resistance material. When current passes through, electrical energy is converted into thermal energy. The insulating sleeve 2 is wrapped around the outside of the heating wire 1 to isolate and protect it from short circuits or leakage. It is made of high-temperature resistant and chemically resistant materials to ensure the safety and stability of the cable. The cabling tie 3 plays a role in tightly fixing the various parts of the cable, increasing the mechanical strength of the cable, and providing a certain pulling force to prevent the cable from loosening or twisting during use. The main function of the metal armor 4 is to protect the cable from external mechanical damage, enhance the durability of the cable, and prevent damage to the cable caused by external force compression or pulling. The armor material uses metal materials such as steel wire and copper wire, and has strong compression and tensile properties. The inner sheath 5 is located outside the metal armor 4 and is made of a polymer material that is resistant to high temperatures and chemicals. It is used to further protect the metal armor 4 from corrosion and ensure the service life of the cable in harsh environments. The outer sheath 6 is the outermost layer of the cable. It is responsible for protecting the cable from chemicals, moisture, ultraviolet rays and other possible external injuries in the environment. It has good weather resistance, wear resistance and waterproofness, and ensures the long-term reliability of the cable in harsh environments. The multi-layer protection structure allows the cable to work stably under conditions of high temperature, strong current, high voltage, etc. and is not easily damaged.

[0029] Example 2

[0030] On the basis of Example 1, Figure 2-Figure 3As shown, a support assembly 7 is arranged outside the insulating core to support and fix it and promote heat conduction. When fixing the insulating core, a positioning sleeve 71 is sleeved outside the insulating core. The support assembly 7 includes a positioning sleeve 71 sleeved outside the insulating core, a triangular support plate 72 is fixed outside the positioning sleeve 71, a fastening frame 74 is fixed on the side of the triangular support plate 72, and a retaining plate 73 is fixed at one end of the triangular support plate 72 away from the fastening frame 74. The outer wall of the retaining plate 73 is in contact with the inner wall of the cable tightening belt 3. The positioning sleeve 71 is sleeved outside the insulating core, and the triangular support plate 72 and the fastening frame 74 fix and reinforce the positioning sleeve 71 through their retaining structure, so that the structure of the overall cable is more solid and more stable. The retaining plate 73 is in contact with the inner wall of the cable tightening belt 3, which can further ensure that the cable will not loosen when subjected to external force or working temperature changes, thereby ensuring the stability of the insulating core in the cable and avoiding the degradation of electrical performance caused by the instability of the insulating core.

[0031] The material of the support component 7 includes but is not limited to metal material, wherein the inner wall of the positioning sleeve 71 is provided with a plurality of grooves 711 for increasing the heat conduction area. The material of the support component 7 is selected as metal material, which has high thermal conductivity and can effectively conduct heat, thereby conducting heat from the insulating wire core to the outside to prevent the wire core from being damaged due to overheating. The presence of the groove 711 increases the contact surface, which can more effectively conduct the heat around the heating wire 1 and reduce the heat accumulation of the heating wire 1.

[0032] Example 3

[0033] On the basis of Example 2, Figure 4-Figure 5As shown, the existing armored heating cable is usually composed of a conductor, an insulating layer and an outer metal armor layer. However, these cables face significant safety hazards when encountering extreme working environment temperatures. Specifically, at too high working temperatures, the insulating material will gradually lose its important insulating properties, which may eventually cause the insulating layer to melt. In this case, the conductor inside the cable may directly contact the outside world, causing an electrical short circuit and causing damage to the cable itself. More seriously, sparks caused by electrical short circuits may cause fires, posing great safety risks to users and the surrounding environment. In order to effectively improve the stability and safety of the armored heating cable in extreme temperature environments, the following settings are made: a protective component 8 for overheating and cooling the insulated wire core is provided on the support component 7, and the protective component 8 includes a temperature measuring cylinder 81 arranged outside the positioning sleeve 71, and a plug plate 86 is arranged inside the temperature measuring cylinder 81. The outside of the temperature measuring cylinder 81 is fixedly connected with a transmission pipe 88, and a water flow groove 89 is opened inside the positioning sleeve 71. The end of the transmission pipe 88 away from the temperature measuring cylinder 81 passes through the inner wall of the positioning sleeve 71 and is connected to the inside of the water flow groove 89. The interior of the temperature measuring tube 81 forms a hot cavity and a cold cavity through the plug plate 86, and the interior of the cold cavity is filled with coolant 87. The interior of the hot cavity is provided with a power component for pushing the plug plate 86 to move in a directional manner and allowing the coolant 87 to flow to the water flow groove 89 through the transmission pipe 88. The power component includes a heat-conducting isolating ring 83 fixed inside the hot cavity. The interior of the hot cavity is formed with a heat storage cavity and an installation cavity through the heat-conducting isolating ring 83. A heat-conducting rod 82 is fixed to the outer wall of the temperature measuring tube 81. One end of the heat-conducting rod 82 passes through the inner wall of the temperature measuring tube 81 and extends to the interior of the heat storage cavity. The material of the heat-conducting rod 82 and the heat-conducting isolating ring 83 includes but is not limited to metal materials. The other end of the heat-conducting rod 82 is fixed to the outer wall of the positioning sleeve 71. An expansive material 85 is fixed to the interior of the installation cavity, and one end of the expansive material 85 is fixed to one side of the plug plate 86. When the heating wire 1 generates heat, the positioning sleeve 71 will absorb heat energy simultaneously. If the temperature exceeds the set value, the heat energy in the positioning sleeve 71 will be introduced into the heat storage chamber through the heat conducting rod 82, causing the expansive material 85 in the heat storage chamber to expand due to the excessively high temperature. The expansive material 85 pushes the plug plate 86 to move in the temperature measuring tube 81, thereby prompting the coolant 87 to flow through the transmission pipe 88 to the water flow groove 89 set inside the positioning sleeve 71. The internal structure of the water flow groove 89 is spiral, which cools the insulated wire core to prevent the insulation layer from melting, thereby ensuring that the armored heating cable can still maintain stability and safety in extreme temperature environments, effectively improving its reliability and durability in various harsh environments. When the temperature returns to normal, the expansive material 85 gradually recovers and pulls the plug plate 86. The movement of the plug plate 86 has an adsorption force, which then absorbs the coolant 87 back into the temperature measuring tube 81.

[0034] The internal structure of the water flow groove 89 is spiral, and the water flow groove 89 is not connected to the plurality of grooves 711. The spiral water flow groove 89 significantly enhances the cooling effect by increasing the contact area between the coolant 87 and the positioning sleeve 71, increasing the occurrence of turbulence, improving the flow uniformity, and improving the heat exchange efficiency. Specifically, since the water flow flows along the spiral curve, the contact time and contact area between the water flow and the groove wall will increase, which can more effectively remove heat from the cable or equipment, thereby improving the heat exchange efficiency. The spiral water flow groove 89 will cause the turbulence or turbulence effect of the water flow, which can avoid the laminar flow of the water flow (i.e., the smooth flow). The turbulence increases the disturbance of the water flow and enhances the heat exchange between the water and the groove wall. The turbulent flow can make it difficult for the water flow to form a thermal boundary layer, thereby improving the cooling effect. The spiral structure helps to maintain the uniformity of the water flow through the constantly changing direction of the water flow, avoids the water flow velocity being too low or stagnant in certain areas, and ensures the consistency and stability of the cooling effect. The spiral design can guide the water flow to move along a curved trajectory, which usually leads to an increase in flow rate. In this case, the water flow with a higher flow rate can absorb and remove heat more effectively. In addition, the spiral flow can also increase the kinetic energy of the fluid, further promoting heat exchange. The spiral water flow groove 89 can also maximize the heat conduction efficiency by designing a tortuous path so that the coolant 87 gradually forms laminar flow or turbulent changes when flowing through the water flow groove 89. Compared with straight-line flow, turbulence in spiral flow reduces the accumulation of temperature differences and ensures that the coolant 87 removes heat more quickly.

[0035] Example 4

[0036] On the basis of Example 3, Figure 6As shown, a micro-balloon 84 is arranged inside the coolant 87, and an inner balloon 842 is arranged inside the micro-balloon 84. The insides of the micro-balloon 84 and the inner balloon 842 are filled with ammonium chloride powder 841. The ammonium chloride powder 841 is an endothermic reaction during the dissolution process, that is, it needs to absorb heat from the surrounding environment to break its crystal structure, thereby reducing the temperature of the coolant 87. If the temperature of the coolant 87 cannot achieve the cooling of the positioning sleeve 71, the temperature of the coolant 87 will increase. As the temperature of the coolant 87 increases, the movement of the gas molecules in the micro-balloon 84 is accelerated, resulting in an increase in the volume of the gas, and the micro-balloon 84 expands. When the expansion reaches a certain degree, the elasticity of the balloon material cannot withstand it, resulting in the rupture of the micro-balloon 84. After the micro-balloon 84 ruptures, the ammonium chloride powder 841 mixes with the coolant 87. The dissolution process of ammonium chloride is an endothermic reaction. This reaction absorbs the heat of the coolant 87, thereby reducing the temperature of the coolant 87 and achieving a cooling effect. There is also an inner balloon 842 inside the micro-balloon 84, which is also filled with ammonium chloride powder 841. When the micro-balloon 84 bursts, the inner balloon 842 inside it will form an individual to be used for the next cooling or double blasting cooling.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-stability armored heating cable, comprising a heating wire (1) and an insulating sheath (2) arranged outside the heating wire (1) and forming an insulating wire core, characterized in that: A cabling tie (3) is arranged outside the insulating wire core, a metal armor (4) is arranged outside the cabling tie (3), an inner sheath (5) is arranged outside the metal armor (4), and an outer sheath (6) is arranged outside the inner sheath (5); Also, a support component (7) is arranged outside the insulating wire core to support and fix it and promote heat conduction, and a protection component (8) is arranged on the support component (7) to cool down the insulating wire core in case of overheating.

2. A high stability armored heating cable according to claim 1, characterized in that: The support assembly (7) comprises a positioning sleeve (71) sleeved on the outside of the insulating wire core, a triangular support plate (72) is fixed to the outside of the positioning sleeve (71), a fastening frame (74) is fixed to the side of the triangular support plate (72), a retaining plate (73) is fixed to one end of the triangular support plate (72) away from the fastening frame (74), and the outer wall of the retaining plate (73) is in contact with the inner wall of the cabling fastening belt (3).

3. A high stability armored heating cable according to claim 1, characterized in that: The material of the support assembly (7) includes but is not limited to metal material, wherein the inner wall of the positioning sleeve (71) is provided with a plurality of grooves (711) for increasing the heat conduction area.

4. A high stability armored heating cable according to claim 1, characterized in that: The protection component (8) comprises a temperature measuring tube (81) arranged outside the positioning sleeve (71), a plug plate (86) is arranged inside the temperature measuring tube (81), a transmission pipe (88) is fixedly connected to the outside of the temperature measuring tube (81), a water flow groove (89) is opened inside the positioning sleeve (71), and one end of the transmission pipe (88) away from the temperature measuring tube (81) passes through the inner wall of the positioning sleeve (71) and is connected to the inside of the water flow groove (89).

5. A high stability armored heating cable according to claim 4, characterized in that: The interior of the temperature measuring cylinder (81) is formed into a hot chamber and a cold chamber through a plug plate (86); the interior of the cold chamber is filled with a cooling liquid (87); and the interior of the hot chamber is provided with a power component for pushing the plug plate (86) to move in a directional manner and allowing the cooling liquid (87) to flow to the water flow groove (89) through a transmission pipe (88).

6. A high stability armored heating cable according to claim 5, characterized in that: The power assembly comprises a heat-conducting isolating ring (83) fixed inside the heat cavity, the inside of the heat cavity forms a heat storage cavity and a mounting cavity through the heat-conducting isolating ring (83), a heat-conducting rod (82) is fixed to the outer wall of the temperature measuring tube (81), one end of the heat-conducting rod (82) penetrates the inner wall of the temperature measuring tube (81) and extends to the inside of the heat storage cavity, the other end of the heat-conducting rod (82) is fixed to the outer wall of the positioning sleeve (71), and an expansion material (85) is fixed to the inside of the mounting cavity, and one end of the expansion material (85) is fixed to one side of the plug plate (86).

7. A high stability armored heating cable according to claim 5, characterized in that: A micro-balloon (84) is arranged inside the cooling liquid (87), an inner balloon (842) is arranged inside the micro-balloon (84), and the insides of the micro-balloon (84) and the inner balloon (842) are both filled with ammonium chloride powder (841).

8. A high stability armored heating cable according to claim 4, characterized in that: The internal structure of the water flow groove (89) is spiral, and the water flow groove (89) is not connected to the plurality of grooves (711).

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