Low-temperature impact-resistant CPVC cable protection pipe

Abstract

This application relates to the field of cable protection pipe technology, and in particular to a low-temperature impact-resistant CPVC cable protection pipe, which includes a protection pipe body, an insulation layer, and a circulation mechanism. An impact-resistant mechanism is fixedly connected to the inner side of the protection pipe body. A cable body is inserted through the insulation pipe body inside the impact-resistant mechanism. A heat exchange mechanism is fixedly connected to the outer surface of the insulation pipe body. The circulation mechanism is located at the top of the protection pipe. This technical solution, through its heat exchange, circulation, impact resistance, and heat recovery structure, combined with a composite insulation layer and a suitable heat exchange medium, efficiently absorbs solar energy and recovers waste heat from the cable, continuously insulating the protection pipe body day and night, resisting external impacts, preventing low-temperature embrittlement and cable overheating, adapting to different low-temperature environments, reducing heat loss and energy consumption, and solving the problems of existing CPVC cable protection pipes such as poor resistance to low temperatures, weak impact resistance, and limited adaptability.

Description

Technical Field

[0001] This application relates to the field of cable protection pipe technology, and in particular to a low-temperature impact resistant CPVC cable protection pipe. Background Technology

[0002] CPVC cable protection pipe, also known as buried high-voltage power cable chlorinated polyvinyl chloride (PVC-C) sleeve, is a rigid, solid-walled pipe made from PVC-C resin as the core raw material, supplemented with impact-resistant agents, stabilizers, and other functional additives, through a high-speed extrusion molding process. The inner and outer walls of this pipe are smooth and flat, and it is usually designed in a striking orange-red color. It has excellent insulation performance, mechanical compressive strength, and chemical corrosion resistance, and can effectively resist external mechanical impact, chemical media erosion, and high-voltage electric field interference. It is a key supporting pipe material for protecting cables from external damage and ensuring transmission stability in various projects such as power transmission and communication cable laying. In practical engineering applications, CPVC cable protection pipes are often exposed to the external environment. The core reason is that the construction conditions and functional requirements of some special scenarios limit the use of traditional buried laying methods. For example, street light cable laying projects on urban main roads and park squares, outdoor cable protection scenarios for new energy facilities such as 5G base stations and photovoltaic power stations, communication signal cable laying operations along highways and railways, and cable crossing projects for special structures such as bridges and rivers. In these application scenarios, cables need to be laid along the ground surface, supports, or structure surfaces. CPVC cable protection pipes, as the direct protective layer, are exposed to the outdoors. They must be able to adapt to the complex natural environment of sun, rain, wind and sand erosion, and ensure the safety and stability of cable transmission. Their weather resistance and UV resistance enable them to meet the basic working conditions of long-term exposed use. However, when CPVC cable protection pipes are applied in special areas with large diurnal temperature differences (such as plateaus, cold northern regions, and deserts), the inherent material properties lead to insufficient low-temperature resistance, a significant technical challenge. These areas experience strong sunlight and high ambient temperatures during the day, while temperatures drop rapidly at night due to lack of solar radiation. In some extreme areas, nighttime temperatures can drop below -20°C, creating a significant diurnal temperature cycle. Because CPVC material molecules are relatively rigid, low-temperature environments cause a significant decrease in pipe toughness and a significant increase in brittleness. At night, in low temperatures, the pipes not only struggle to withstand minor impacts and snowstorms, but also experience continuous internal stress accumulation due to thermal expansion and contraction caused by the diurnal temperature difference. Long-term cycles can lead to pipe wall cracks, loose joints, and even overall breakage, ultimately resulting in the loss of effective cable protection. In severe cases, this can cause power transmission failures or safety hazards. Existing CPVC technologies... Cable protection pipes lack targeted cold-resistant optimization design, and their low-temperature performance is difficult to adapt to the use needs of areas with large day-night temperature differences. The overall application has obvious defects and deficiencies. Therefore, it is urgent to carry out targeted improvement design to solve the problem of stable protection in low-temperature environments. Summary of the Invention

[0003] In order to improve the cold resistance and low temperature resistance of existing cable protection pipes in the exposed state, this application provides a low temperature impact resistant CPVC cable protection pipe.

[0004] This application provides a low-temperature impact-resistant CPVC cable protection pipe, which adopts the following technical solution: it includes a protection pipe body, an insulation layer, and a circulation mechanism. An impact-resistant mechanism is fixedly connected to the inner side of the protection pipe body. A cable body is inserted inside the insulation pipe body, located inside the impact-resistant mechanism. A heat exchange mechanism is fixedly connected to the outer surface of the insulation pipe body. The circulation mechanism is located at the top of the protection pipe and is connected to both the heat exchange mechanism and the impact-resistant mechanism. The insulation layer is disposed inside the insulation main pipe and the circulation mechanism for heat preservation. The heat exchange mechanism includes an outer heat exchange tube and an inner heat exchange component. The outer heat exchange tube is sleeved and fixed to the outside of the protective tube body. A first heat exchange arc plate is integrally formed on the top of the outer heat exchange tube. A secondary heat exchange component is fixedly connected to the top of the first heat exchange arc plate. The top of the first heat exchange arc plate has first area-increasing corrugated grooves arranged at equal intervals along an arc shape. The surface of the first area-increasing corrugated grooves of the first heat exchange arc plate is coated with a black chrome coating. The inner heat exchange component is disposed inside the insulation tube body and located outside the impact-resistant mechanism. Heat exchange medium fluid flows inside the outer heat exchange tube, the secondary heat exchange component, the circulation mechanism, and the impact-resistant mechanism. The outer heat exchange tube is connected to the secondary heat exchange component and the circulation mechanism. The black chrome coating absorbs light energy to heat the fluid medium. The heat exchange fluid of this protective tube can be industrial-grade ethylene glycol aqueous solution, food-grade propylene glycol aqueous solution, or an ethylene glycol-propylene glycol (1:1) mixture, wherein the industrial-grade ethylene glycol aqueous solution contains ≥99.5%... The first type is a propylene glycol solution prepared with ethylene glycol and pure water. Concentrations of 30%, 40%, and 50% correspond to freezing points of -12℃, -22℃, and -35℃, respectively, with a specific heat capacity of 2.8-3.2 kJ / (kg·℃). It is suitable for long-term operation in cold regions ranging from -30℃ to 5℃. When using this solution, 0.1%-0.3% borax or nitrite compound agents should be added to inhibit slight corrosion. The second type is a food-grade propylene glycol aqueous solution prepared with ≥99.0% propylene glycol and pure water. Concentrations of 30%, 40%, and 50% correspond to freezing points of -10℃, -18℃, and -28℃, respectively, with a specific heat capacity of 3.0-3.3 kJ / (kg·℃). It has extremely low corrosiveness and lower toxicity than ethylene glycol, requiring no additional corrosion inhibitors. It is suitable for environments with high safety requirements (such as near residential areas) ranging from -25℃ to 5℃. The third type is a 1:1 ethylene glycol-propylene glycol mixture. It is prepared by mixing ethylene glycol, propylene glycol and pure water in proportions. The freezing points of 40% and 50% total concentrations are -25℃ and -38℃, respectively, and the specific heat capacity is 3.0-3.1 kJ / (kg·℃). It combines excellent antifreeze properties with low corrosion resistance. The amount of corrosion inhibitor can be halved. It is suitable for extreme low temperature scenarios in extremely cold regions from -35℃ to 5℃. The three fluids can be flexibly selected according to the actual low temperature environment, safety requirements and operating conditions. By reasonably adjusting the concentration and supporting protective measures, a stable antifreeze heat exchange effect can be achieved.

[0005] Optionally, the internal heat exchange component includes an inner tube, which is disposed inside the insulation layer within the protective tube body. A cavity is formed between the inner tube and the insulation layer of the insulation tube body. A protective tube heating capillary coil is fixedly connected inside the cavity. The input end of the protective tube heating capillary coil is connected to the circulation mechanism, and the protective tube heating capillary coil is connected to the impact-resistant mechanism.

[0006] Optionally, the secondary heat exchange assembly includes a threaded interface, which is located at both ends of the top of the first heat exchange arc plate. A threaded connector is threaded to the inner side of the threaded interface. A straight pipe is fixedly connected to the top of the threaded connector. A secondary heat exchange tube is fixedly connected to the top of the straight pipe. A second heat exchange arc plate is integrally formed on the top of the outer surface of the secondary heat exchange tube. A second area-increasing corrugated groove is evenly spaced along the arc on the top of the second heat exchange arc plate. The surface of the second area-increasing corrugated groove of the second heat exchange arc plate is also coated with a black chrome coating. The bottom of the secondary heat exchange tube is connected to the outer heat exchange tube through the threaded interface, and the top of the secondary heat exchange tube is connected to the circulation mechanism through a connecting pipe.

[0007] Optionally, the circulation mechanism includes an insulated tank, with an insulation layer disposed on the inner wall of the tank. One side of the bottom of the circulation mechanism is connected to a secondary heat exchanger via a connecting pipe. A circulation pump is fixedly connected to one side of the bottom of the insulated tank. A capillary delivery pipe is fixedly connected to the output end of the circulation pump. The output end of the capillary delivery pipe is connected to the input end of the protective tube heating capillary coil. A capillary return pipe is fixedly connected to the output end of the protective tube heating capillary coil. The output end of the capillary return pipe is connected to the insulated tank. An electric heating coil is fixedly connected inside the insulated tube. During application... During the day, the first heat exchange arc plate on the outer heat exchange tube and the second heat exchange arc plate on the auxiliary heat exchange tube are exposed to sunlight, heating the fluid medium inside them. The corrugated design of the first and second corrugated grooves further increases the area exposed to sunlight for the black chrome coating, thus improving the effectiveness of absorbing sunlight and heating the fluid medium. Since the outer and auxiliary heat exchange tubes are located at the bottom, while the insulation tank is at a higher position, the low-temperature fluid inside the insulation tank flows downwards into the outer and auxiliary heat exchange tubes. The heated fluid continuously rises and enters the interior of the insulation tank, thus storing the heat absorbed by the outer and auxiliary heat exchange tubes into the tank. In areas with large diurnal temperature variations, the fluid is efficiently heated during the day and the temperature is stored inside the tank. At night, a circulation pump is activated to slowly transport the heat from inside the tank to the protective heating capillary coil via a capillary tube, transferring the heat into the inner tube to assist in heating and improve its resistance to cold and low temperatures. Excess fluid can then be returned through a capillary return tube. The fluid flows back into the insulation tank. After the pre-stored high temperature inside the insulation tank is consumed, the electric heating coil can be activated to heat the fluid and achieve circulation. During normal use, because the protective tube body has an insulation layer and its capillary flow rate is slow, it can ensure that the temperature can remain inside the inner tube for a long time. During normal use, the electric heating coil is only needed to be activated in extreme cases where the temperature is particularly low. In most cases, its solar thermal energy can provide heat energy for insulation and cold resistance. During use, temperature sensors can be installed inside the protective tube body and the insulation tank to assist in temperature detection and achieve heat exchange and insulation treatment.

[0008] Optionally, the bottom of the heat-insulating tank is fixedly connected to a heat-insulating tube, which is sleeved on the outer surface of the capillary delivery tube and the capillary return tube. The heat-insulating tube can insulate the capillary delivery tube and the capillary return tube, preventing heat loss from the capillary delivery tube and the capillary return tube.

[0009] Optionally, a mounting bracket is installed on one side of the heat-insulating tank by screws, and a mounting plate is welded to the rear side of the mounting bracket. Mounting holes are provided at the four corners of the mounting plate. The mounting holes are countersunk holes. The mounting bracket and the mounting plate cooperate to mount the heat-insulating tank on the top of the heat exchange mechanism. During use, the first heat exchange arc plate can be positioned on the sun-facing side. Both the first and second heat exchange arc plates are made of aluminum alloy with high thermal conductivity.

[0010] Optionally, the impact-resistant mechanism includes a cable heat absorption group and a buffer module. The buffer module is arranged in a ring at equal intervals and fixedly connected to the inside of the inner tube. The cable heat absorption group is located in the middle of the protective tube body, and the outer side of the cable heat absorption group is connected to the inner side of the buffer module.

[0011] Optionally, the buffer module includes side plates, which are arranged in a ring at equal intervals and fixedly connected to the inner wall of the inner tube. Buffer springs are arranged in a linear arrangement at equal intervals on the inner side of the side plates. A connecting plate is fixedly connected to the inner side of the buffer springs. The inner side of the connecting plate is fixedly connected to the outer surface of the cable heat absorption group. Dampers are fixedly connected to both ends of the connecting plate, and the end of the damper away from the connecting plate is fixedly connected to both ends of the side plates.

[0012] Optionally, the cable heat absorption assembly includes a cable heat conduit, which is fixedly connected to the inner sides of the connecting plate. The inner side of the cable heat conduit is fitted to the outer surface of the cable body. An inner heat exchange capillary coil is fixedly connected inside the cable heat conduit. Several capillary connecting tubes are evenly spaced at the top of the inner heat exchange capillary coil. The outer ends of the capillary connecting tubes are connected to the protective tube heating capillary coil. During application, the temperature of the cable body surface can reach between 40°C and 90°C. At this time, the cable heat conduit is sleeved on the cable body. The surface can help absorb the heat of the cable body and transfer it to the heat exchange fluid medium inside the inner heat exchange capillary coil. At this time, the temperature of the heat exchange fluid medium is relatively high. When its temperature is higher than that of the fluid inside the outer protective tube used for insulation and cold resistance, the high temperature at the bottom can be transmitted upward to the inner heat exchange capillary coil of the protective tube to protect the main body of the protective tube. At the same time, it can also adaptively absorb and conduct heat to reduce the temperature of the cable. The overall design of external solar heating and internal cable body surface temperature heat exchange can provide good cold resistance for the insulation tube body in areas with large day and night temperature differences.

[0013] Optionally, the insulation layer includes a first insulation layer and a second insulation layer. The first insulation layer is fixedly connected to the inner wall of the insulation tank and the inner wall of the protective tube body. The second insulation layer is fixedly connected to the inner side of the first insulation layer. A waterproof silicone layer is provided on the inner side of the second insulation layer. The first insulation layer is made of polyimide and the second insulation layer is made of aerogel.

[0014] In summary, this application includes the following beneficial technical effects: During the application of this technical solution, by setting up a heat exchange mechanism and a circulation mechanism, combined with a heat exchange arc plate coated with black chrome and corrugated grooves with increased area, it is possible to efficiently capture solar energy and convert it into heat energy during use. The heat is stored in the heat-insulating tank through natural circulation. When the temperature drops at night, the stored heat energy is circulated to the main body of the protective tube by a circulation pump through the heat exchange medium. Combined with the heat insulation effect of the composite heat insulation layer and the heat insulation tube covering it, heat loss is reduced and the internal temperature of the protective tube is maintained stably. Multiple adaptable heat exchange media can cope with different low-temperature environments, avoid freezing and ensure smooth circulation. The electric heating coil serves as a backup heating device to further ensure the heat preservation requirements under extreme low temperatures. This effectively solves the problem of insufficient low-temperature resistance of existing CPVC cable protective tubes, which are prone to damage due to low-temperature embrittlement in areas with large day-night temperature differences. Moreover, it does not require continuous external energy, and the energy utilization efficiency is significantly improved. During the application of this technical solution, by setting up an impact-resistant mechanism and a cable heat absorption-related structure, the system effectively absorbs external impacts such as collisions and snowstorms through the cooperation of buffer springs and dampers, reducing the impact on the main body of the protective tube and the internal cable, and ensuring structural integrity. At the same time, the cable heat conduit is attached to the cable body, which can promptly dissipate the heat generated by the cable during operation and transfer it to the medium in the internal heat exchange capillary coil. On the one hand, this prevents the cable from becoming too hot due to heat accumulation, thus affecting its operational stability and achieving efficient heat dissipation. On the other hand, the recovered waste heat participates in the insulation cycle of the main body of the protective tube, working synergistically with solar heat to further improve the cold resistance. This design not only strengthens the impact resistance of the protective tube but also makes full use of the cable's waste heat, reducing the start-up frequency of the backup heating device. While improving the reliability of protection, it further optimizes energy utilization efficiency and solves the problems of weak impact resistance at low temperatures and difficulty in balancing cable heat dissipation and insulation in existing technologies for CPVC cable protective tubes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a bottom-view structural diagram of an embodiment of this application; Figure 3This is a side view of the protective tube body, heat exchange mechanism, and impact resistance mechanism in the embodiments of this application; Figure 4 This is a schematic diagram of the heat exchange mechanism and the impact resistance mechanism in their disassembled state in the embodiments of this application; Figure 5 This is a schematic diagram of the cross-sectional state of the heat exchange mechanism in the embodiments of this application; Figure 6 This is a schematic diagram of the disassembled structure of the protective tube body and the impact-resistant mechanism in the embodiments of this application; Figure 7 This is a bottom view of the circulation mechanism in an embodiment of this application; Figure 8 This is an embodiment of the present application. Figure 6 A magnified structural diagram at point A; Figure 9 This is an embodiment of the present application. Figure 7 A magnified structural diagram at point B; Figure 10 This is an embodiment of the present application. Figure 7 A magnified structural diagram at point C; Figure 11 This is a schematic diagram of the insulation layer structure in an embodiment of this application.

[0016] Reference numerals: 1. Protective pipe body; 2. Insulation layer; 21. First insulation layer; 22. Second insulation layer; 3. Circulation mechanism; 31. Insulation tank; 32. Circulation pump; 33. Capillary delivery pipe; 34. Capillary return pipe; 35. Covered insulation pipe; 36. Mounting bracket; 37. Mounting plate; 38. Mounting hole; 4. Cable body; 5. Heat exchange mechanism; 51. Outer heat exchange pipe; 52. Inner heat exchange assembly; 521. Inner pipe; 522. Cavity; 523. Protective pipe heating capillary coil; 53. First heat exchange... 54. Arc plate; 55. Corrugated groove added to the first area; 55. Secondary heat exchange component; 551. Threaded interface; 552. Straight pipe; 553. Secondary heat exchange tube; 554. Secondary heat exchange arc plate; 555. Corrugated groove added to the second area; 556. Threaded joint; 6. Impact-resistant mechanism; 61. Cable heat absorption assembly; 611. Cable heat conduit; 612. Internal heat exchange capillary coil; 613. Capillary connecting pipe; 62. Buffer module; 621. Side plate; 622. Buffer spring; 623. Connecting plate; 624. Damper. Detailed Implementation

[0017] The following is in conjunction with the appendix Figures 1-11 This application will be described in further detail.

[0018] This application discloses a low-temperature impact-resistant CPVC cable protection pipe. For example... Figures 1-11As shown, it includes a protective pipe body 1, an insulation layer 2, and a circulation mechanism 3. An impact-resistant mechanism 6 is fixedly connected to the inner side of the protective pipe body 1. A cable body 4 is inserted inside the insulation pipe body, located inside the impact-resistant mechanism 6. A heat exchange mechanism 5 is fixedly connected to the outer surface of the insulation pipe body. The circulation mechanism 3 is located at the top of the protective pipe and is connected to both the heat exchange mechanism 5 and the impact-resistant mechanism 6. The insulation layer 2 is located inside the insulation main pipe and the circulation mechanism 3 for heat preservation. The heat exchange mechanism 5 includes an outer heat exchange tube 51 and an inner heat exchange component 52. The outer heat exchange tube 51 is sleeved and fixed to the outside of the protective tube body 1. A first heat exchange arc plate 53 is integrally formed on the top of the outer heat exchange tube 51. A secondary heat exchange component 55 is fixedly connected to the top of the first heat exchange arc plate 53. The top of the first heat exchange arc plate 53 has first area-increasing corrugated grooves 54 arranged at equal intervals along an arc shape. The surface of the first area-increasing corrugated grooves 54 of the first heat exchange arc plate 53 is coated with a black chrome coating. The inner heat exchange component 52 is disposed inside the insulation tube body and located outside the impact-resistant mechanism 6. The outer heat exchange tube 51, the secondary heat exchange component 55, the circulation mechanism 3, and the impact-resistant mechanism 6 are all included. The internal components of mechanism 6 contain a heat exchange medium. The outer heat exchange tube 51 is connected to the circulation mechanism 3 via the auxiliary heat exchange component 55. During application, this device, through the installation of a protective tube body 1, insulation layer 2, circulation mechanism 3, impact-resistant mechanism 6, heat exchange mechanism 5, and cable body 4, achieves low-temperature impact resistance and stable protection. During the day, when sunlight shines on the first heat exchange arc plate 53 of the heat exchange mechanism 5, the corrugated groove 54 on its surface increases the light-receiving area. The black chrome coating efficiently absorbs light energy and converts it into heat energy, which is transferred to the heat exchange medium inside the outer heat exchange tube 51. The low-temperature heat exchange medium is heated and its density is reduced inside the outer heat exchange tube 51. The heat generated by the cable body 4 during operation is transferred through the heat exchange path around the impact-resistant mechanism 6, working in synergy with the solar-heated heat exchange medium to further increase the heat storage capacity. At night, when the ambient temperature drops, the circulation mechanism 3 transports the stored high-temperature heat exchange medium to the inside of the protective pipe body 1. The heat is released through the flow of the heat exchange medium, maintaining a stable internal temperature for the protective pipe body 1 and preventing performance degradation due to low temperatures. The outer heat exchange pipe 51 is fitted over the outside of the protective pipe body 1. To ensure heat exchange efficiency and provide external protection, the interconnected design of the auxiliary heat exchange component 55 and the circulation mechanism 3 ensures smooth circulation of the heat exchange medium. The increased corrugated groove 54 in the first area, combined with the black chrome coating, significantly improves solar energy utilization efficiency. The insulation layer 2 continuously blocks heat loss. The impact-resistant mechanism 6 provides structural protection for the main body of the protective tube 1 and the cable body 4 throughout the entire process, preventing damage caused by external impacts. Through the coordinated operation of the heat exchange mechanism 5 and the circulation mechanism 3, this device efficiently utilizes solar energy to heat and store the heat exchange medium. Combined with the heat insulation effect of the insulation layer 2, it effectively improves the low-temperature resistance of the main body of the protective tube 1, solving the problem of traditional CPVC cable protection tubes being prone to brittleness and damage in low-temperature environments. At the same time, the reasonable structural design ensures heat exchange efficiency and structural stability, extends the service life of the protective tube, and ensures the safe operation of the cable body 4 in complex environments.

[0019] Please refer to Figures 1-8The impact-resistant mechanism 6 includes a cable heat absorption group 61 and a buffer module 62. The buffer module 62 is arranged in a ring at equal intervals and fixedly connected to the inside of the inner tube 521. The cable heat absorption group 61 is located in the middle of the protective tube body 1. The outer side of the cable heat absorption group 61 is connected to the inner side of the buffer module 62. The buffer module 62 includes a side plate 621, which is arranged in a ring at equal intervals and fixedly connected to the inner wall of the inner tube 521. Buffer springs 622 are arranged linearly at equal intervals and fixedly connected to the inner side of the side plate 621. A connecting plate 623 is fixedly connected to the inner side of the buffer spring 622. The inner side of the connecting plate 623 is fixedly connected to the outer surface of the cable heat absorption group 61. Dampers 6 are fixedly connected to both ends of the connecting plate 623. 24. The end of the damper 624 away from the connecting plate 623 is fixedly connected to both ends of the side plate 621. The cable heat absorption group 61 includes a cable heat conduit 611, which is fixedly connected to the inner side of the connecting plate 623. The inner side of the cable heat conduit 611 is attached to the outer surface of the cable body 4. An inner heat exchange capillary coil 612 is fixedly connected inside the cable heat conduit 611. Several capillary connecting tubes 613 are evenly spaced at the top of the inner heat exchange capillary coil 612. The outer end of the capillary connecting tube 613 is connected to the heating capillary coil 523 of the protective tube. The insulation layer 2 includes a first insulation layer 21 and a second insulation layer 22. The first insulation layer 21 is fixedly connected to the inner wall of the insulation tank 31 and the protective tube 523. On the inner wall of the pipe body 1, the second thermal insulation layer 22 is fixedly connected to the inner side of the first thermal insulation layer 21. A waterproof silicone layer is provided on the inner side of the second thermal insulation layer 22. The first thermal insulation layer 21 is made of polyimide, and the second thermal insulation layer 22 is made of aerogel. During application, this device, through the installation of the impact-resistant mechanism 6 and the insulation layer 2, simultaneously achieves impact protection, cable waste heat recovery, and efficient insulation functions. When the protective pipe body 1 is subjected to external collisions or wind and snow pressure, the buffer spring 622 of the buffer module 62 deforms, actively absorbing the impact energy. The dampers 624 at both ends of the connecting plate 623 synchronously buffer the rebound force of the spring 622, preventing secondary impacts from occurring. The impact affects the structure, but the cable heat absorption group 61 maintains its stability through its connection with the buffer module 62, ensuring uninterrupted heat transfer. The cable heat conduit 611 of the cable heat absorption group 61 is attached to the cable body 4, which can capture the heat generated during cable operation in a timely manner and transfer it to the outer inner heat exchange capillary coil 612. Then, it is transported to the protective tube heating capillary coil 523 through the capillary connecting pipe 613 to participate in the overall heat exchange cycle. The first thermal insulation layer 21 of the insulation layer 2 is made of polyimide, and the second thermal insulation layer 22 is made of aerogel. The two layers work together to block heat loss. The waterproof silicone layer inside the second thermal insulation layer 22 prevents external moisture from intruding and avoids affecting the thermal insulation performance.This design allows the impact-resistant mechanism 6 to resist external impacts and protect the integrity of the protective tube body 1 and the cable body 4. Simultaneously, through the cooperation of the cable heat conduit 611 and the internal heat exchange capillary coil 612, it effectively recovers waste heat from the cable, providing additional thermal energy for insulation. The composite insulation layer 2, composed of polyimide and aerogel, significantly improves the insulation effect and reduces heat loss. The waterproof silicone layer further ensures the long-term stability of the insulation layer 2. The synergistic effect of these three elements enhances the impact resistance of the protective tube, improves insulation efficiency and reliability, reduces the risk of damage to the tube due to increased brittleness at low temperatures, and fully utilizes the cable's waste heat to reduce energy consumption, ensuring stable operation of the cable body 4 at suitable temperatures.

[0020] Please refer to Figures 1-6 and Figure 8The circulation mechanism 3 includes an insulated tank 31. An insulation layer 2 is disposed on the inner wall of the insulated tank 31. The bottom side of the circulation mechanism 3 is connected to a secondary heat exchanger tube 553 via a connecting pipe. A circulation pump 32 is fixedly connected to the bottom side of the insulated tank 31. A capillary delivery tube 33 is fixedly connected to the output end of the circulation pump 32. The output end of the capillary delivery tube 33 is connected to the input end of the protective tube heating capillary coil 523. A capillary return tube 34 is fixedly connected to the output end of the protective tube heating capillary coil 523. The output end of the capillary return tube 34 is connected to the insulated tank 31. An electric heating coil is fixedly connected inside the insulation tube. The bottom of the insulated tank 31 is fixedly... A heat-insulating tube 35 is connected to the outer surface of the capillary delivery tube 33 and the capillary return tube 34. A mounting bracket 36 is screwed onto one side of the heat-insulating tank 31. A mounting plate 37 is welded to the rear of the mounting bracket 36. Mounting holes 38 are provided at each of the four corners of the mounting plate 37. These mounting holes 38 are countersunk holes. During application, this device, through the circulation mechanism 3 and related components, enables efficient storage, stable delivery, and continuous replenishment of thermal energy. The mounting bracket 36 and the mounting plate 37 work together to securely mount the heat-insulating tank 31. The countersunk hole design of the mounting holes 38 facilitates overall fixation and ensures the stability of the circulation mechanism 3. During use, the structure remains stable. During the day, the heated heat exchange medium enters the insulation tank 31 through the connecting pipe. The insulation layer 2 on the inner wall of the insulation tank 31 reduces heat loss and effectively stores heat energy. At night, when the temperature drops, the circulating pump 32 starts, transporting the high-temperature heat exchange medium in the insulation tank 31 to the protective heating capillary coil 523 through the capillary delivery pipe 33. After releasing heat, the medium returns to the insulation tank 31 through the capillary return pipe 34, forming a closed-loop circulation. The insulation pipe 35, wrapped around the capillary delivery pipe 33 and the capillary return pipe 34, prevents heat loss during transport, further improving heat exchange efficiency. When the heat energy stored in the insulation tank 31... Once consumed, the electric heating coil activates to heat the medium inside the tank, continuously providing heat to the main body of the protective tube 1, ensuring uninterrupted insulation. This design allows the circulation mechanism 3 to efficiently store the heat collected during the day and precisely deliver the heat to the parts requiring insulation at night through controllable circulation. The electric heating coil is designed to handle extreme low-temperature scenarios, ensuring continuous insulation under different operating conditions. The application of the insulation tube 35 reduces heat loss during the heat transfer process and improves energy utilization efficiency. At the same time, the stable installation of the insulation tank 31 ensures the long-term reliability of the circulation mechanism 3, providing continuous and stable support for the low-temperature resistance performance of the main body of the protective tube 1.

[0021] Please refer to Figures 1-6The internal heat exchange assembly 52 includes an inner tube 521, which is disposed inside the insulation layer 2 within the protective tube body 1. A cavity 522 is formed between the inner tube 521 and the insulation layer 2 of the insulation tube body. A protective tube heating capillary coil 523 is fixedly connected inside the cavity 522. The input end of the protective tube heating capillary coil 523 is connected to the circulation mechanism 3, and the protective tube heating capillary coil 523 is connected to the impact-resistant mechanism 6. The secondary heat exchange assembly 55 includes a threaded interface 551, which is located at both ends of the top of the first heat exchange arc plate 53. A threaded connector 556 is threadedly connected to the inner side of the threaded interface 551. A straight tube 552 is fixedly connected to the top of the threaded connector 556, and a secondary heat exchange tube 55 is fixedly connected to the top of the straight tube 552. 3. A second heat exchange arc plate 554 is integrally formed on the top of the outer surface of the auxiliary heat exchange tube 553. The top of the second heat exchange arc plate 554 has second area-increasing corrugated grooves 555 arranged at equal intervals along an arc shape. The surface of the second area-increasing corrugated grooves 555 of the second heat exchange arc plate 554 is also coated with a black chrome coating. The bottom of the auxiliary heat exchange tube 553 is connected to the outer heat exchange tube 51 through a threaded interface 551, and the top of the auxiliary heat exchange tube 553 is connected to the circulation mechanism 3 through a connecting pipe. During the application of this device, by setting the inner heat exchange component 52 and the auxiliary heat exchange component 55, it can fully utilize solar energy to achieve heat exchange and insulation. During the daytime, when sunlight shines, the second heat exchange arc plate 554 of the auxiliary heat exchange component 55 and the first heat exchange arc plate 53 jointly receive sunlight. The second corrugated groove 555 with increased area and the first corrugated groove 54 on the surface of the heat exchanger expand the light-receiving contact range. The black chrome coating on the groove surface can efficiently absorb light energy and convert it into heat energy, which is transferred to the heat exchange medium inside the auxiliary heat exchanger tube 553 and the heat exchanger outer tube 51, respectively, so as to raise the temperature of the medium. The cavity 522 between the inner tube 521 of the inner heat exchanger assembly 52 and the insulation layer 2 provides installation space for the protective tube heating capillary coil 523. When the circulation mechanism 3 delivers the heat exchange medium, the protective tube heating capillary coil 523 can evenly distribute the medium and transfer heat. The auxiliary heat exchanger tube 553 is connected to the heat exchanger outer tube 51 through the straight tube 552 and the threaded interface 551, so that the heated medium from both places can be collected and transported to the circulation through the connecting pipe. Mechanism 3, and the connection design between the protective tube heating capillary coil 523, the circulation mechanism 3, and the impact-resistant mechanism 6, ensures that the heated medium can continuously flow through the interior of the protective tube body 1, achieving effective heat transfer. This structural design allows the heat exchange medium to fully absorb the heat energy converted from solar energy during the flow process, and then transfer the heat to the protective tube body 1 through the internal heat exchange component 52, raising the temperature of the protective tube body 1 and avoiding the impact of low temperature environment. At the same time, the setting of double heat exchange arc plate and double corrugated groove enhances the solar energy absorption efficiency, and the application of black chrome coating further improves the heat energy conversion effect, making the heat exchange process more efficient, providing stable heat preservation protection for the protective tube body 1, reducing structural damage caused by excessively low temperature, and ensuring the normal use of the protective tube.

[0022] The implementation principle of a low-temperature impact-resistant CPVC cable protection pipe according to this application embodiment is as follows: When using this technical solution, firstly, the heat preservation tank 31 is fixed by mounting bracket 36 and mounting plate 37. The first heat exchange arc plate 53 faces the sun. The surfaces of the first heat exchange arc plate 53 and the second heat exchange arc plate 554 are coated with black chrome coating and have corrugated grooves to increase area. The buffer module 62 inside the main body 1 of the protection pipe is fixed by the side plate 621. The cable heat absorption group 61's cable heat conduit 611 is attached to the cable body 4. The inner heat exchange capillary coil 612 is connected to the heating capillary coil 523 of the protection pipe through the capillary connecting pipe 613, forming a complete internal heat exchange path. Then, according to the usage scenario, a suitable heat exchange medium is selected and injected into the internal flow channels of the outer heat exchange tube 51, the auxiliary heat exchange tube 553, the circulation mechanism 3, and the impact-resistant mechanism 6 to complete the process. Before commissioning, during operation, sunlight shines on the first heat exchange arc plate 53 and the second heat exchange arc plate 554. The black chrome coating absorbs light energy and converts it into heat energy. The corrugated grooves increase the area of ​​light reception, which improves the heating efficiency of the heat exchange medium. The low-temperature heat exchange medium flows downward into the outer heat exchange tube 51 and the auxiliary heat exchange tube 553. After being heated, the density decreases and it floats upward into the heat preservation tank 31. The heat energy is stored through natural circulation. The heat preservation layer 2 on the inner wall of the heat preservation tank 31 is composed of the first heat preservation layer 21, the second heat preservation layer 22 and the waterproof silicone layer, which reduces the heat loss in the tank. At the same time, the heat generated by the cable body 4 is continuously absorbed by the cable heat conduit 611 and transferred to the heat exchange medium in the inner heat exchange capillary coil 612, realizing the output and temporary storage of cable heat and avoiding the cable body 4 from overheating due to heat accumulation. As the ambient temperature drops at night, when the temperature sensor inside the protective tube body 1 detects that the temperature is below the set value, the circulation pump 32 is activated. The high-temperature heat exchange medium stored in the insulation tank 31 is then transported through the capillary delivery tube 33 to the protective tube heating capillary coil 523. During the flow of the medium, heat is released to maintain a stable internal temperature for the protective tube body 1. At this time, the residual heat from the cable temporarily stored in the inner heat exchange capillary coil 612 is also transferred to the protective tube heating capillary coil 523 along with the circulating heat exchange medium. This heat, combined with the solar heat stored in the insulation tank 31, further enhances the insulation effect inside the protective tube body 1. The insulation tube 35 is then fitted around the capillary delivery tube 33 and the capillary return tube 34. To prevent heat loss during transport, the heat-exchanged medium flows back to the insulation tank 31 through the capillary return pipe 34, forming a closed loop. If the heat energy stored in the insulation tank 31 is exhausted and the temperature sensor in the insulation tank 31 detects a continuous drop in temperature, the electric heating coil is activated to heat the medium, ensuring that the insulation requirements are continuously met. When the protective tube body 1 is subjected to external impact or wind and snow pressure, the buffer spring 622 of the buffer module 62 deforms to absorb the impact force, and the damper 624 buffers the rebound force of the spring 622. The cable heat absorption group 61 maintains structural stability through its connection with the buffer module 62, while continuously playing a role in heat transfer. This technical solution utilizes a heat exchange mechanism 5 to absorb solar energy and recover waste heat from the cable, combined with a circulation mechanism 3 to store and transport heat energy, providing continuous insulation for the protective tube body 1. The cable heat pipe 611, attached to the cable body 4, dissipates heat, preventing the cable from overheating due to heat accumulation and achieving heat dissipation. Simultaneously, the dissipated heat is transferred to the medium in the internal heat exchange capillary coil 612. At night, when the temperature drops, the medium circulates and participates in the insulation of the protective tube body 1, further enhancing its cold resistance. Three heat exchange media are suitable for different low-temperature environments, preventing freezing and ensuring stable circulation. The double-layer insulation layer 2 and the covering insulation pipe 35 reduce heat loss, maintaining the internal temperature of the protective tube body 1 at CPVC. Within the material's tolerance range, the design avoids the decrease in pipe toughness and the increase in brittleness caused by low temperatures, and solves problems such as pipe wall cracks, loosening of joints, and breakage. The material selection, coating design, and corrugated groove structure of the first heat exchange arc plate 53 and the second heat exchange arc plate 554 synergistically improve solar heating efficiency, ensuring that the daytime heat storage meets the nighttime insulation needs without relying on a continuous external energy supply. The cable waste heat recovery structure fully utilizes the heat generated by the cable operation to supplement the heat energy required for insulation, reducing the start-up frequency of the electric heating coil and improving energy utilization efficiency. The impact-resistant mechanism 6, through the buffer spring 622 and... The damper 624 enhances the impact resistance of the protective tube body 1, solving the problem of increased brittleness of the tube at low temperatures, which makes it susceptible to damage from external forces. It ensures the structural integrity of the protective tube body 1 and protects the cable body 4, preventing power transmission failures. The insulation layer 2 works in concert to reduce heat loss, extend insulation duration, and reduce energy consumption. The circulation mechanism 3 combines natural and forced circulation, with an electric heating coil as a backup heating device, ensuring insulation requirements under different working conditions. It adapts to complex environmental changes in areas with large day-night temperature differences, avoiding the accumulation of thermal expansion and contraction stress caused by day-night temperature differences in traditional CPVC pipes, and reducing the risk of pipe damage.

[0023] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-temperature impact-resistant CPVC cable protection pipe, characterized in that; The device includes a protective pipe body (1), an insulation layer (2), and a circulation mechanism (3). An impact-resistant mechanism (6) is fixedly connected to the inner side of the protective pipe body (1). A cable body (4) is installed inside the insulation pipe body, located inside the impact-resistant mechanism (6). A heat exchange mechanism (5) is fixedly connected to the outer surface of the insulation pipe body. The circulation mechanism (3) is located at the top of the protective pipe. The circulation mechanism (3) is connected to the heat exchange mechanism (5) and the impact-resistant mechanism (6) respectively. The insulation layer (2) is installed inside the insulation main pipe and the circulation mechanism (3) for heat preservation. The heat exchange mechanism (5) includes an outer heat exchange tube (51) and an inner heat exchange component (52). The outer heat exchange tube (51) is sleeved and fixed on the outside of the protective tube body (1). The top of the outer heat exchange tube (51) is integrally formed with a first heat exchange arc plate (53). The top of the first heat exchange arc plate (53) is fixedly connected with a secondary heat exchange component (55). The top of the first heat exchange arc plate (53) is provided with first area-increasing corrugated grooves (54) arranged at equal intervals along an arc. The surface of the first area-increasing corrugated grooves (54) of the first heat exchange arc plate (53) is coated with a black chrome coating. The inner heat exchange component (52) is located inside the heat insulation tube body and outside the impact-resistant mechanism (6). The heat exchange medium fluid flows inside the outer heat exchange tube (51), the secondary heat exchange component (55), the circulation mechanism (3), and the impact-resistant mechanism (6). The outer heat exchange tube (51) is connected to the circulation mechanism (3) through the secondary heat exchange component (55).

2. The low-temperature impact-resistant CPVC cable protection pipe according to claim 1, characterized in that: The internal heat exchange component (52) includes an inner tube (521), which is located inside the insulation layer (2) of the protective tube body (1). A cavity (522) is provided between the inner tube (521) and the insulation layer (2) of the insulation tube body. A protective tube heating capillary coil (523) is fixedly connected inside the cavity (522). The input end of the protective tube heating capillary coil (523) is connected to the circulation mechanism (3). The protective tube heating capillary coil (523) is connected to the impact resistance mechanism (6).

3. The low-temperature impact-resistant CPVC cable protection pipe according to claim 2, characterized in that: The secondary heat exchange assembly (55) includes a threaded interface (551), which is located at both ends of the top of the first heat exchange arc plate (53). The inner side of the threaded interface (551) is threaded with a threaded connector (556). A straight pipe (552) is fixedly connected to the top of the threaded connector (556). A secondary heat exchange tube (553) is fixedly connected to the top of the straight pipe (552). A second heat exchange arc plate (554) is integrally formed on the top of the outer surface of the secondary heat exchange tube (553). A second area-increasing corrugated groove (555) is equally spaced along the arc on the top of the second heat exchange arc plate (554). The surface of the second area-increasing corrugated groove (555) of the second heat exchange arc plate (554) is also coated with a black chrome coating. The bottom of the secondary heat exchange tube (553) is connected to the heat exchange outer tube (51) through the threaded interface (551). The top of the secondary heat exchange tube (553) is connected to the circulation mechanism (3) through the connecting pipe.

4. The low-temperature impact-resistant CPVC cable protection pipe according to claim 3, characterized in that: The circulation mechanism (3) includes a heat preservation tank (31). The heat preservation layer (2) inside the circulation mechanism (3) is disposed on the inner wall of the heat preservation tank (31). The bottom side of the circulation mechanism (3) is connected to the auxiliary heat exchange tube (553) through a connecting pipe. A circulation pump (32) is fixedly connected to the bottom side of the heat preservation tank (31). A capillary conveying tube (33) is fixedly connected to the output end of the circulation pump (32). The output end of the capillary conveying tube (33) is connected to the input end of the protective tube heating capillary coil (523). A capillary return tube (34) is fixedly connected to the output end of the protective tube heating capillary coil (523). The output end of the capillary return tube (34) is connected to the heat preservation tank (31). An electric heating coil is fixedly connected inside the heat preservation tube.

5. The low-temperature impact-resistant CPVC cable protection pipe according to claim 4, characterized in that: The bottom of the heat preservation tank (31) is fixedly connected to a heat preservation tube (35), which is sleeved on the outer surface of the capillary delivery tube (33) and the capillary return tube (34).

6. The low-temperature impact-resistant CPVC cable protection pipe according to claim 5, characterized in that: The heat preservation tank (31) is mounted with a mounting bracket (36) by screws on one side. A mounting plate (37) is welded to the rear side of the mounting bracket (36). Mounting holes (38) are provided at the four corners of the mounting plate (37). The mounting holes (38) are countersunk holes.

7. The low-temperature impact-resistant CPVC cable protection pipe according to claim 6, characterized in that: The impact-resistant mechanism (6) includes a cable heat absorption group (61) and a buffer module (62). The buffer module (62) is arranged in a ring at equal intervals and fixedly connected to the inside of the inner tube (521). The cable heat absorption group (61) is located in the middle of the protective tube body (1). The outer side of the cable heat absorption group (61) is connected to the inner side of the buffer module (62).

8. The low-temperature impact-resistant CPVC cable protection pipe according to claim 7, characterized in that: The buffer module (62) includes a side plate (621). The side plates (621) are arranged in a ring at equal intervals and fixedly connected to the inner wall of the inner tube (521). Buffer springs (622) are arranged in a linear arrangement at equal intervals on the inner side of the side plates (621). A connecting plate (623) is fixedly connected to the inner side of the buffer springs (622). The inner side of the connecting plate (623) is fixedly connected to the outer surface of the cable heat absorption group (61). Dampers (624) are fixedly connected to both ends of the connecting plate (623). The end of the damper (624) away from the connecting plate (623) is fixedly connected to both ends of the side plate (621).

9. A low-temperature impact-resistant CPVC cable protection pipe according to claim 7, characterized in that: The cable heat absorption assembly (61) includes a cable heat conduit (611), which is fixedly connected to the inner side of the connecting plate (623). The inner side of the cable heat conduit (611) is attached to the outer surface of the cable body (4). An inner heat exchange capillary coil (612) is fixedly connected inside the cable heat conduit (611). Several capillary connecting tubes (613) are provided at equal intervals on the top of the inner heat exchange capillary coil (612). The outer end of the capillary connecting tube (613) is connected to the protective tube heating capillary coil (523).

10. A low-temperature impact-resistant CPVC cable protection pipe according to claim 9, characterized in that: The insulation layer (2) includes a first insulation layer (21) and a second insulation layer (22). The first insulation layer (21) is fixedly connected to the inner wall of the insulation tank (31) and the inner wall of the protective tube body (1). The second insulation layer (22) is fixedly connected to the inner side of the first insulation layer (21). The inner side of the second insulation layer (22) is provided with a waterproof silicone layer. The first insulation layer (21) is made of polyimide material, and the second insulation layer (22) is made of aerogel material.

Images