Rapid unfreezing device for outdoor pipeline

Abstract

The invention relates to the technical field of pipeline anti-freezing and unfreezing, in particular to an outdoor pipeline quick unfreezing device which comprises a lower cover body and an upper cover body which are fastened through a lower fixing ring, an upper fixing ring and bolts and nuts, and a top cover is arranged at the top of the outdoor pipeline quick unfreezing device. A heat preservation skin, heat preservation cotton, a graphene heating plate and a spiral guide plate are sequentially arranged in an inner cavity, the upper cover body fan heater is connected with an air inlet pipe through a first pipe set, the lower cover body is provided with an air outlet pipe, a temperature measuring probe is arranged in the cavity, the graphene heating plate is fixed to an installation block with an electrode slice through a spring, and the upper cover body and the lower cover body are matched with sealing semi-rings. The graphene electric heating and hot air spiral auxiliary heating mode is adopted, the heat preservation performance is good, temperature control is accurate, installation is convenient and fast, no open fire exists, safety is higher, the defects of an existing mode are efficiently overcome, adaptability is high, and the labor cost and the operation period are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of pipeline antifreeze and thawing technology, and in particular to a rapid thawing device for outdoor pipelines. Background Technology

[0002] Outdoor pipeline rapid thawing devices are specialized equipment used in industrial and civil fields to melt frozen media and restore the fluid transport function of outdoor pipelines that are prone to freezing in low-temperature environments. Their core function is to quickly thaw the pipeline when the internal media (such as water or chemicals) freezes due to low temperatures, blocking the transport path. This is achieved through specific heating or temperature control methods, ensuring the continuous and stable operation of the pipeline system and preventing equipment downtime and system failures caused by pipeline freezing. They are particularly indispensable in scenarios with high requirements for pipeline reliability, such as industrial production and energy supply.

[0003] Currently, existing outdoor pipeline thawing devices and methods mostly revolve around passive protection and localized heating. During the pipeline laying phase, the pipeline is usually wrapped with an insulation layer to reduce the impact of the low-temperature environment on the internal medium temperature and delay freezing. Once the pipeline freezes, the existing treatment methods mainly rely on manual heating. This involves manually identifying the frozen section, removing the external insulation layer in that area, and using equipment such as temperature detectors and ultrasonic detectors to confirm the location and degree of freezing within the pipeline. Then, external heating methods such as open flame heating or electric heating tape wrapping are used to heat the frozen section. Through heat conduction, the frozen medium inside the pipeline gradually melts, and the insulation layer is re-laid after the thawing operation is completed.

[0004] However, existing outdoor pipeline thawing methods and devices have many shortcomings, making it difficult to meet the needs of efficient and safe thawing in industrial production. Especially in low-temperature winter environments, after the turbine is shut down, the outdoor pipelines from the chemical dosing room to the plant, even with insulation layers, are still highly susceptible to freezing due to the continuous impact of low ambient temperatures and uneven heat dissipation in the pipelines. Using existing methods, a large amount of manpower is required to locate and inspect the frozen pipe sections. The process of removing the insulation layer, conducting instrument tests, and subsequently re-laying the insulation layer is cumbersome, not only consuming a lot of time and significantly extending the pipeline thawing and system recovery cycle, but also significantly increasing labor costs. At the same time, open flame heating poses significant safety hazards, easily leading to excessively high local temperatures in the pipelines, causing deformation, aging, and even risks such as media leakage and fire. Furthermore, the uncertainty of the thawing process can affect the safe startup of the unit.

[0005] Therefore, it is necessary to provide a new rapid thawing device for outdoor pipelines to solve the above-mentioned technical problems. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides an outdoor pipeline rapid defrosting device.

[0007] The outdoor pipeline rapid defrosting device provided by this invention includes: a lower cover body, an upper cover body on top of the lower cover body, a lower fixing ring fixedly connected to the outer wall of the top of the lower cover body, an upper fixing ring fixedly connected to the outer wall of the bottom of the upper cover body, and a top cover rotatably connected to the top of the upper cover body; both the lower and upper cover bodies have cavities inside, and an insulation skin is fixedly connected inside the cavity. Insulation cotton is provided on the outer wall of the insulation skin, and the insulation cotton is fixedly connected to the upper and lower cover bodies by rivets. A graphene heating plate is fixedly connected to the inner wall of the insulation skin, and a semi-cylindrical groove is provided on the inner side of the graphene heating plate. A spiral guide plate is provided on the inner side of the cylindrical groove. The two semi-cylindrical grooves are detachably and fixedly connected to the lower cover and the upper cover, respectively. A heater is fixedly connected to the top of the upper cover, and an air inlet pipe is fixedly connected to the inside of the upper cover. One end of the air inlet pipe passes through the insulation cotton, insulation skin, and graphene heating plate in sequence and is inserted into the cavity. The other end of the air inlet pipe extends out from the top of the upper cover and is connected to the heater through the first pipe assembly. An air outlet pipe is fixedly connected to the inside of the lower cover. One end of the air outlet pipe is inserted into the cavity through the insulation cotton, insulation skin, and graphene heating plate. The other end of the air outlet pipe extends out from one side of the lower cover. A temperature probe is installed in the cavity, located inside the insulation skin.

[0008] Preferably, both the lower and upper fixing rings have multiple sets of through mounting holes. Bolts are inserted into the mounting holes from top to bottom, and nuts are threaded to the bottom of the bolts. The nuts are located below the lower fixing ring and abut against the lower surface of the lower fixing ring. The lower fixing ring and the upper fixing ring are fastened together by the cooperation of the bolts and nuts.

[0009] Preferably, the spiral guide plate is composed of multiple upper spiral plates and multiple lower spiral plates. The upper spiral plates are fixedly connected to the semi-cylindrical grooves on the inner side of the upper cover body, and the lower spiral plates are fixedly connected to the semi-cylindrical grooves on the inner side of the lower cover body. The upper and lower spiral plates are connected end to end to form a complete spiral guide channel. The two bottom ends of the upper spiral plates are respectively fixedly connected with inserts, and the two top ends of the lower spiral plates are respectively provided with slots. The inserts and slots are inserted and matched.

[0010] Preferably, the first pipe assembly consists of a first valve body and an air outlet pipe. The air outlet pipe is fixedly connected to the output end of the heater, and the two ends of the first valve body are fixedly connected to the air outlet pipe and the air inlet pipe respectively through flange rings.

[0011] Preferably, the end of the air outlet pipe away from the lower cover is fixedly connected to a second valve body via a flange ring, and the end of the second valve body away from the air outlet pipe is fixedly connected to an exhaust pipe via a flange ring.

[0012] Preferably, both ends of the upper and lower cover are equipped with sealing semi-rings for sealing against the outer wall of the outdoor pipe.

[0013] Preferably, a limiting plate is fixedly connected to the side of the upper cover away from its rotatable connection with the top cover, and the limiting plate is used to limit the position of the top cover.

[0014] Preferably, both the upper and lower covers are made of stainless steel.

[0015] Preferably, an installation block is fixedly connected to the interior of one end of both the upper and lower covers, and the installation block is fixedly connected to the graphene heating plate; an electrode sheet for conductive connection with the graphene heating plate is slidably connected to the interior of the two opposing sides of the installation blocks.

[0016] Preferably, springs are symmetrically arranged inside the mounting block. One end of the spring is fixedly connected to the electrode plate, and the other end of the spring is fixedly connected to the inner wall of the mounting block. The spring always has an elastic force to drive the electrode plate fixed to it to move closer to another electrode plate.

[0017] Compared with related technologies, the outdoor pipeline rapid defrosting device provided by the present invention has the following beneficial effects: Dual heating design significantly improves defrosting efficiency: This invention employs a dual heating mode combining graphene electric heating and hot air spiral auxiliary heating. The graphene heating plate features rapid heating and high heat conduction efficiency, allowing for direct, close-range heat transfer to the pipeline. The spiral guide plate creates a circumferential spiral flow of hot air, extending the contact time between the hot air and the pipeline and ensuring heating uniformity. Simultaneously, the hot air heats up after heat exchange with the graphene heating plate, further enhancing the heating effect. Compared to existing single-layer open flame or electric heating, this dual-layer heating method significantly improves the defrosting speed, effectively shortening the overall defrosting cycle of the pipeline.

[0018] Easy to install and operate, reducing labor costs and work cycle: The device adopts a split-type snap-fit ​​structure. During installation, simply snap the lower cover and upper cover onto the frozen pipe and tighten them with bolts and nuts to complete the fixation. This eliminates the need for tedious manual inspection of the freezing location and degree, significantly reducing manual operation steps. Disassembly is as simple as loosening the nuts to disassemble the device, which is reusable. Compared to the multi-step manual operation of existing thawing methods, this device effectively saves manpower, reduces labor costs, and significantly shortens the operation cycle of pipe thawing and system restoration.

[0019] Flameless heating mode improves operational safety and reliability: This invention employs a flameless operation mode that combines electric heating and hot air heating throughout the entire process, completely avoiding problems such as excessively high local temperatures in pipelines, pipeline deformation and aging, and media leakage caused by existing open flame heating methods. At the same time, it eliminates the safety hazard of fire caused by open flames. The precise temperature control of the graphene heating plate and the stainless steel cover further avoid the risk of equipment failure during the heating process, improving the overall safety and reliability of pipeline defrosting operations in outdoor low-temperature environments.

[0020] Precise temperature control and heat retention optimize heating performance: Temperature probes are installed inside the device cavity to accurately monitor the temperature of the heating area in real time. This allows staff to adjust the heating power and hot air volume according to actual thawing needs, avoiding energy waste and pipe damage caused by blind heating. At the same time, the insulation cotton is firmly fixed with rivets, forming a double-layer insulation structure with the insulation skin. This effectively reduces heat loss from the cavity to the outside, achieving heat storage, ensuring stable temperature in the heating area, further optimizing the heating effect, and improving energy utilization efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the outdoor pipeline rapid defrosting device provided by the present invention; Figure 2 for Figure 1 The diagram shows the structure after the cover is opened; Figure 3 for Figure 2 One of the schematic diagrams of the cross-sectional structure of the upper cover shown; Figure 4 for Figure 3 The diagram shows the structure. Figure 5 for Figure 2 The second schematic diagram of the cross-sectional structure of the upper cover plate shown; Figure 6 for Figure 5 The diagram shows the structure of the mounting block. Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of the mounting block shown; Figure 8 for Figure 4 The diagram shows the structure of the bottom of the upper spiral plate.

[0022] The diagram is labeled as follows: 1. Lower cover; 2. Upper cover; 3. Lower fixing ring; 4. Upper fixing ring; 5. Top cover; 6. Cavity; 7. Insulation skin; 8. Insulation cotton; 9. Graphene heating plate; 10. Spiral guide plate; 11. Warm air blower; 12. Air inlet pipe; 13. Air outlet pipe; 14. Mounting hole; 15. Bolt; 16. Nut; 17. Upper spiral plate; 18. Lower spiral plate; 19. First valve body; 20. Air outlet pipe; 21. Flange ring; 22. Second valve body; 23. Exhaust pipe; 25. Sealing half ring; 26. Limiting plate; 27. Mounting block; 28. Electrode plate; 29. ​​Spring; 30. Temperature probe; 31. Insert block; 32. Slot. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] like Figures 1 to 8 As shown, an outdoor pipe rapid defrosting device includes: a lower cover 1, an upper cover 2 on top of the lower cover 1, a lower fixing ring 3 fixedly connected to the outer wall of the top of the lower cover 1, an upper fixing ring 4 fixedly connected to the outer wall of the bottom of the upper cover 2, and a top cover 5 rotatably connected to the top of the upper cover 2; both the lower cover 1 and the upper cover 2 have cavities 6 inside, an insulation skin 7 fixedly connected inside the cavity 6, insulation cotton 8 on the outer wall of the insulation skin 7, and the insulation cotton 8 fixedly connected to the upper cover 2 and the lower cover 1 by rivets; a graphene heating plate 9 fixedly connected to the inner wall of the insulation skin 7, and a semi-cylindrical groove 24 on the inner side of the graphene heating plate 9. A spiral guide plate 10 is provided on the inner side of the cylindrical groove 24. The two semi-cylindrical grooves 24 are detachably and fixedly connected to the lower cover 1 and the upper cover 2, respectively. A heater 11 is fixedly connected to the top of the upper cover 2, and an air inlet pipe 12 is fixedly connected to the inside of the upper cover 2. One end of the air inlet pipe 12 passes through the insulation cotton 8, the insulation skin 7, and the graphene heating plate 9 in sequence and is inserted into the cavity 6. The other end of the air inlet pipe 12 extends out from the top of the upper cover 2 and is connected to the heater 11 through the first pipe assembly. An air outlet pipe 13 is fixedly connected to the inside of the lower cover 1. One end of the air outlet pipe 13 is inserted into the cavity 6 through the insulation cotton 8, the insulation skin 7, and the graphene heating plate 9. The other end of the air outlet pipe 13 extends out from one side of the lower cover 1. A temperature probe 30 is provided in the cavity 6, and the temperature probe 30 is located inside the insulation skin 7.

[0026] It should be noted that: the upper cover 2 and the lower cover 1 are made of stainless steel, which has good structural strength, corrosion resistance and thermal conductivity, and is suitable for complex low-temperature outdoor working environments; the sealing half ring 25 is made of elastic sealing material, which can fit tightly against the outer wall of the pipe to achieve a seal between the device and the pipe and reduce the leakage of heat from the cavity 6 to the outside; the limiting plate 26 can limit the position of the rotating and opened top cover 5 to prevent the top cover 5 from rotating excessively and causing damage to the components. The top cover 5 is designed to protect the internal components such as the heater 11 and the air inlet pipe 12 and facilitate inspection and maintenance; the multiple sets of mounting holes 14 of the lower fixing ring 3 and the upper fixing ring 4 are evenly distributed in a ring. The cooperation of the bolts 15 and the nuts 16 can achieve a firm fastening between the lower cover 1 and the upper cover 2 and ensure the fit between the device and the pipe; A mirror-reflective film is applied to the outer side of the graphene heating plate 9 to reflect the heat source of the graphene heating plate.

[0027] like Figures 2 to 5 , Figure 8 As shown, both the lower fixing ring 3 and the upper fixing ring 4 have multiple sets of through mounting holes 14. Bolts 15 are inserted into the interior of the mounting holes 14 from top to bottom. Nuts 16 are threaded to the bottom of the bolts 15. The nuts 16 are located below the lower fixing ring 3 and abut against the lower surface of the lower fixing ring 3. The lower fixing ring 3 and the upper fixing ring 4 are fastened together by the cooperation of the bolts 15 and the nuts 16. The spiral guide plate 10 consists of multiple upper spiral plates 17 and multiple lower spiral plates 18. The upper spiral plates 17 are fixedly connected to the semi-cylindrical grooves 24 on the inner side of the upper cover 2, and the lower spiral plates 18 are fixedly connected to the semi-cylindrical grooves 24 on the inner side of the lower cover 1. The upper spiral plates 17 and lower spiral plates 18 are connected end to end to form a complete spiral guide channel. The two bottom ends of the upper spiral plates 17 are respectively fixedly connected to the inserts 31, and the two top ends of the lower spiral plates 18 are respectively provided with slots 32. The inserts 31 and slots 32 are inserted and matched to achieve precise docking of the spiral guide channel and avoid air leakage. After the upper cover 1 and lower cover 2 of the defrosting device are assembled by bolts 15 and nuts 16, the upper spiral plates 17 and lower spiral plates 18 of the internal air duct are inserted into place. The first pipe assembly consists of a first valve body 19 and an air outlet pipe 20. The air outlet pipe 20 is fixedly connected to the output end of the heater 11. The two ends of the first valve body 19 are fixedly connected to the air outlet pipe 20 and the air inlet pipe 12 respectively via flange rings 21. The end of the air outlet pipe 13 away from the lower cover 1 is fixedly connected to a second valve body 22 via flange ring 21. The end of the second valve body 22 away from the air outlet pipe 13 is fixedly connected to an exhaust pipe 23 via flange ring 21.

[0028] It should be noted that: the insulation cotton 8 is evenly fixed to the inner wall of the cavity 6 between the upper cover 2 and the lower cover 1 by multiple sets of rivets, the connection is firm and not easy to fall off. The insulation skin 7 and the insulation cotton 8 form a double-layer insulation structure, which greatly reduces the heat loss in the cavity 6. The mounting block 27 provides stable installation support for the graphene heating plate 9. The spring 29 inside it always has the elastic force to drive the electrode plates 28 to move in opposite directions, which can ensure the tight fit of the two electrode plates 28, realize the stable conductivity of the graphene heating plate 9, avoid heating failure due to poor contact of the electrode plates 28, and the sliding design of the electrode plates 28 can be used to make fine adjustments to the position when the device is fastened.

[0029] like Figures 2 to 7 As shown, both ends of the upper cover 2 and the lower cover 1 are equipped with sealing semi-rings 25 for sealing against the outer wall of the outdoor pipe. A limiting plate 26 is fixedly connected to the side of the upper cover 2 away from its rotatable connection with the top cover 5, and the limiting plate 26 is used to limit the top cover 5. Both the upper cover 2 and the lower cover 1 are made of stainless steel. An installation block 27 is fixedly connected to the inside of one end of the upper cover 2 and the lower cover 1. The installation block 27 is fixedly connected to the graphene heating plate 9. An electrode plate 28 for conductive connection with the graphene heating plate 9 is slidably connected to the inside of the two opposing sides of the two installation blocks 27. Springs 29 are symmetrically arranged inside the installation blocks 27. One end of the spring 29 is fixedly connected to the electrode plate 28, and the other end of the spring 29 is fixedly connected to the inner wall of the installation block 27. The spring 29 always has an elastic force to drive the electrode plate 28 fixed to it to move closer to the other electrode plate 28.

[0030] It should be noted that: the first valve body 19 and the second valve body 22 can respectively realize the on / off control of the air inlet and outlet passages, which is convenient for adjusting the delivery and discharge of hot air according to the defrosting needs. The connection method of the flange ring 21 makes the disassembly and assembly between the pipes more convenient. The upper spiral plate 17 and the lower spiral plate 18 of the spiral guide plate 10 are precisely connected end to end after the device is fastened, forming a continuous spiral guide channel, which can extend the residence time of the hot air output by the heater 11 in the cavity 6, so that the hot air can fully exchange heat with the graphene heating plate 9, and at the same time, the hot air can be blown evenly in a spiral along the circumference of the pipe to ensure the uniformity of pipe heating. The temperature probe 30 is set close to the inside of the insulation skin 7, which can accurately detect the actual heating temperature in the cavity 6, providing accurate temperature data for the control of heating power and air volume of heater 11, and avoiding excessive local temperature in the pipe.

[0031] The working principle of this invention is as follows: Installation, fixing, and sealing: First, remove the insulation layer from the outer wall of the pipe to be thawed. Then, fasten the split lower cover 1 and upper cover 2 onto the lower and upper parts of the frozen pipe section, respectively, so that the pipe is embedded between them. The upper spiral plate 17 and lower spiral plate 18 fit against the frozen pipe to form a spiral air duct. The elastic sealing semi-ring 25 is squeezed and fits tightly against the outer wall of the pipe, achieving a sealed fit between the device and the pipe. Then, insert the bolts 15 from top to bottom into the evenly distributed annular mounting holes 14 of the lower fixing ring 3 and upper fixing ring 4, and tighten the nuts 16 to securely fasten both, ensuring that the entire device tightly hugs the frozen pipe section. The basic installation can be completed by a single person, making the operation convenient and efficient.

[0032] System startup and preheating: After the device is fixed, the circuit is closed and the heater 11 on the top of the upper cover 2 is started. The hot air output by the heater 11 is sent into the cavity 6 through the first pipe group (first valve body 19, air outlet pipe 20) and the air inlet pipe 12. At the same time, the passage of the air outlet pipe 13 is controlled by the second valve body 22, so that the hot air quickly replaces the cold air in the cavity 6, forming a positive pressure environment in the cavity 6, effectively preventing the infiltration of external cold air, and laying a solid foundation for subsequent heating. The graphene heating system is started at the same time. The spring 29 in the mounting block 27 drives the electrode plates 28 to stick together with the elastic force, ensuring the stable conduction of the graphene heating plate 9 circuit and starting the preheating.

[0033] Dual heating and constant temperature control: After being powered on, the graphene heating plate 9 heats up rapidly and acts directly on the outer wall of the pipe through close-range heat conduction, achieving core electric heating. Simultaneously, the hot air continuously delivered by the heater 11 flows through a spiral guide channel formed by the connection of the upper spiral plate 17 and the lower spiral plate 18, extending the residence time of the hot air in the cavity 6. After sufficient heat exchange with the graphene heating plate 9, the air heats up and is evenly spirally blown along the circumference of the pipe, forming a dual heating mode of "graphene electric heating + hot air auxiliary heating". A temperature probe 30, placed in the spiral guide channel and close to the pipe, detects the heating temperature in real time and feeds it back to the temperature control device. The temperature control device, in conjunction with the graphene heating plate 9 and the heater 11, maintains the temperature of the graphene heating plate 9 stably at around 50℃, achieving precise constant temperature heating and preventing localized overheating damage to the pipe. During this process, the double-layer insulation structure composed of the insulation skin 7 and the insulation cotton 8, combined with the device's sealing design, significantly reduces heat loss and improves heating efficiency.

[0034] Thawing Completion and Disassembly: Under the dual heating and constant temperature insulation effects, the frozen medium inside the pipeline melts rapidly, restoring the pipeline's fluid transport function and ensuring the safe startup of the unit. After thawing, first turn off the temperature control device and stop the graphene heating plate 9 and the warm air blower 11. After the device cools down naturally, loosen bolts 15 and nuts 16, and disassemble the lower cover 1 and upper cover 2 to complete the disassembly of the device. It can be transferred to other frozen pipe sections for reuse without the need for subsequent insulation restoration, further saving operating time and labor costs.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rapid defrosting device for outdoor pipes, characterized in that, include: The lower cover (1) is provided with an upper cover (2) at the top of the lower cover (1). A lower fixing ring (3) is fixedly connected to the outer wall of the top of the lower cover (1). An upper fixing ring (4) is fixedly connected to the outer wall of the bottom of the upper cover (2). A top cover (5) is rotatably connected to the top of the upper cover (2). Both the lower cover (1) and the upper cover (2) have cavities (6) inside. An insulation skin (7) is fixedly connected inside the cavity (6). An insulation cotton (8) is provided on the outer wall of the insulation skin (7). The insulation cotton (8) is fixedly connected to the upper cover (2) and the lower cover (1) by rivets. The insulation cotton (8) is fixedly connected to the upper cover (2) and the lower cover (1) by rivets. A graphene heating plate (9) is fixedly connected to the inner wall of the insulation skin (7). A semi-cylindrical groove (24) is provided on the inner side of the graphene heating plate (9). The inner wall of the cover is provided with a spiral guide plate (10), and the two semi-cylindrical grooves (24) are detachably fixedly connected to the lower cover (1) and the upper cover (2) respectively; a heater (11) is fixedly connected to the top of the upper cover (2), and an air inlet pipe (12) is fixedly connected inside the upper cover (2). One end of the air inlet pipe (12) passes through the insulation cotton (8), the insulation skin (7) and the graphene heating plate (9) in sequence and is inserted into the cavity (6). The other end of the air inlet pipe (12) extends out from the top of the upper cover (2) and is connected to the heater (11) through the first pipe group; an air outlet pipe (13) is fixedly connected inside the lower cover (1). One end of the air outlet pipe (13) is inserted into the cavity (6) through the insulation cotton (8), the insulation skin (7) and the graphene heating plate (9), and the other end of the air outlet pipe (13) extends out from one side of the lower cover (1). A temperature probe (30) is installed inside the cavity (6), and the temperature probe (30) is located inside the insulation skin (7).

2. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, Both the lower fixing ring (3) and the upper fixing ring (4) have multiple sets of through mounting holes (14). Bolts (15) are inserted into the mounting holes (14) from top to bottom. Nuts (16) are threaded to the bottom of the bolts (15). Nuts (16) are located below the lower fixing ring (3) and abut against the lower surface of the lower fixing ring (3). The lower fixing ring (3) and the upper fixing ring (4) are fastened together by the cooperation of the bolts (15) and the nuts (16).

3. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, The spiral guide plate (10) is composed of multiple upper spiral plates (17) and multiple lower spiral plates (18). The upper spiral plates (17) are fixedly connected to the semi-cylindrical groove (24) on the inner side of the upper cover (2), and the lower spiral plates (18) are fixedly connected to the semi-cylindrical groove (24) on the inner side of the lower cover (1). The upper spiral plates (17) and the lower spiral plates (18) are connected end to end to form a complete spiral guide channel. The two bottom ends of the upper spiral plates (17) are respectively fixedly connected with inserts (31), and the two top ends of the lower spiral plates (18) are respectively provided with slots (32). The inserts (31) and slots (32) are inserted and matched.

4. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, The first pipe assembly consists of a first valve body (19) and an air outlet pipe (20). The air outlet pipe (20) is fixedly connected to the output end of the heater (11). The two ends of the first valve body (19) are fixedly connected to the air outlet pipe (20) and the air inlet pipe (12) respectively through flange rings (21).

5. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, The end of the air outlet pipe (13) away from the lower cover (1) is fixedly connected to the second valve body (22) via the flange ring (21), and the end of the second valve body (22) away from the air outlet pipe (13) is fixedly connected to the exhaust pipe (23) via the flange ring (21).

6. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, Both ends of the upper cover (2) and the lower cover (1) are equipped with sealing half rings (25) for sealing against the outer wall of the outdoor pipe.

7. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, A limiting plate (26) is fixedly connected to the side of the upper cover (2) away from the side that is rotatably connected to the top cover (5). The limiting plate (26) is used to limit the top cover (5).

8. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, Both the upper cover (2) and the lower cover (1) are made of stainless steel.

9. The outdoor pipeline rapid defrosting device according to claim 1, characterized in that, An installation block (27) is fixedly connected to one end of both the upper cover (2) and the lower cover (1), and the installation block (27) is fixedly connected to the graphene heating plate (9); an electrode sheet (28) for conductive connection with the graphene heating plate (9) is slidably connected to the opposite side of both installation blocks (27).

10. The outdoor pipeline rapid defrosting device according to claim 9, characterized in that, Springs (29) are symmetrically arranged inside the mounting block (27). One end of the spring (29) is fixedly connected to the electrode plate (28), and the other end of the spring (29) is fixedly connected to the inner wall of the mounting block (27). The spring (29) always has an elastic force to drive the electrode plate (28) fixed to it to approach another electrode plate (28).

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