Pre-buried pipeline anti-freezing device and method

Abstract

The invention provides a pre-buried pipeline anti-freezing device and method, and belongs to the technical field of construction production, and the pre-buried pipeline anti-freezing device comprises a pipeline heating device and a hot air supply device; the pipeline heating device comprises an air inlet end straight pipe, an air outlet end straight pipe and a middle section air pipe; an air inlet pipe is arranged on the side wall of the upper part of the air inlet end straight pipe; an air outlet pipe is arranged on the side wall of the upper part of the air outlet end straight pipe; an air inlet port and an air outlet port of the middle-section air pipe are communicated with the air outlet end of the air inlet end straight pipe through a first bent pipe and are communicated with the air inlet end of the air outlet end straight pipe through a second bent pipe respectively; the hot air supply device comprises a hot air generation device, a heat supply pipeline arranged at a hot air generation opening of the hot air generation device and a heat supply return pipe arranged at an air return opening of the hot air generation device. The problem that in the prior art, an effective scheme which can be operated on the earth surface, is not affected by the underground soil environment and has a good anti-freezing effect on the pre-buried pipeline is lacked can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction production, and more specifically, to a pre-buried pipeline antifreeze device and method. Background Art

[0002] In extremely cold regions, most outdoor pipes are buried in the soil. Due to special reasons, such as insufficient burial depth during construction and abnormally cold weather, the liquid in the pipes can easily freeze and swell, becoming unable to flow, which has a huge impact on production and life.

[0003] There are currently two main antifreeze treatment methods for pre-buried pipes. One is to directly wrap a layer of insulating foam on the outside of the pipe. The disadvantage is that it is passive antifreeze. If encountering special extreme weather, the liquid in the pipe is very easy to freeze, affecting the safe operation of the pipe. The other is to attach electric heating wire to the pipe and convert electrical energy (resistance) into thermal energy. The disadvantage is that the energy utilization rate is low, and because it is buried in the soil, the humidity is high, and the resistance wire is easy to rust. The longer the time, the worse the heating effect on the pipe.

[0004] In summary, there is currently a lack of an effective solution that can be operated on the surface, is not affected by the underground soil environment, and has a good antifreeze effect on pre-buried pipelines. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a pre-buried pipe antifreeze device and method to solve the problem in the prior art that there is a lack of an effective solution that can be operated on the surface, is not affected by the underground soil environment, and has a good antifreeze effect on the pre-buried pipe.

[0006] The present invention provides a pre-buried pipeline antifreeze device, comprising a pipeline heating device and a hot air supply device; wherein the pipeline heating device comprises an air inlet end straight pipe, an air outlet end straight pipe and a middle section air duct which are all arranged along the length direction of the pre-buried pipeline and are parallel to each other; wherein,

[0007] One end of the straight tube at the air inlet end is a sealed end, and the other end is an air outlet end, and an air inlet pipe is arranged on the upper side wall of the straight tube at the air inlet end; one end of the straight tube at the air outlet end is an air inlet end, and the other end is a sealed end, and an air outlet pipe is arranged on the upper side wall of the straight tube at the air outlet end;

[0008] The air inlet port and the air outlet port of the middle air duct are respectively connected to the air outlet end of the air inlet end straight pipe through the first elbow pipe and connected to the air inlet end of the air outlet end straight pipe through the second elbow pipe;

[0009] The hot air supply device comprises a hot air generating device, a heat supply pipe arranged at a hot air generating port of the hot air generating device, and a heat supply return pipe arranged at a return air port of the hot air generating device;

[0010] The heat delivery pipe is connected to the air inlet pipe;

[0011] The heat supply return pipe is connected to the air outlet pipe.

[0012] In addition, a preferred solution is that the middle section of the air duct is a zigzag tube formed by at least two parallel straight air duct tubes connected in series via a third bend tube.

[0013] In addition, a preferred solution is that the port of the first bent pipe and the air inlet port of the middle air duct, the port of the first bent pipe and the air outlet end of the straight pipe at the air inlet end, the port of the second bent pipe and the air outlet port of the middle air duct, the port of the second bent pipe and the air inlet end of the straight pipe at the air outlet end, and the port of the straight pipe of the air duct and the port of the third bent pipe are all connected by internal threads.

[0014] In addition, a preferred solution is that the pipeline heating device also includes a double-layer insulation pipe sleeve sleeved on the outer side wall of the embedded pipeline; an air inlet end straight pipe fixing groove, an air outlet end straight pipe fixing groove and a middle section air duct fixing groove are arranged in the interlayer of the double-layer insulation pipe sleeve;

[0015] The straight pipe at the air inlet end, the straight pipe at the air outlet end and the middle section air duct are respectively arranged in the straight pipe fixing groove at the air inlet end, the straight pipe fixing groove at the air outlet end and the middle section air duct fixing groove.

[0016] In addition, a preferred solution is that, in the interlayer of the double-layer insulation pipe sleeve, insulation fillers are provided between the straight pipe fixing groove at the air inlet end and the straight pipe fixing groove at the air outlet end, between the straight pipe fixing groove at the air outlet end and the middle air duct fixing groove, and between the straight pipe fixing groove at the air inlet end and the middle air duct fixing groove.

[0017] In addition, a preferred solution is that a zipper is provided on the thermal insulation pipe sleeve along the length direction of the embedded pipe.

[0018] In addition, a preferred solution is that movable tie ties are provided on both end sleeves of the thermal insulation pipe sleeve.

[0019] In addition, a preferred solution is that the heat supply pipe and the hot air generating port of the hot air generating device, the heat supply pipe and the air inlet pipe, the heat supply return pipe and the return air port of the hot air generating device, and the heat supply return pipe and the air outlet pipe are all connected by connecting threads.

[0020] In addition, a preferred solution is that the hot air generating device is a hot air blower; and a temperature controller is provided on the hot air generating device.

[0021] The present invention provides a method for preventing freezing of pre-buried pipes, which uses the pre-buried pipe antifreeze device as described above to prevent freezing of the pre-buried pipes, and comprises the following steps:

[0022] Step S1, surrounding the pipeline heating device on the outer side wall of the pre-buried pipeline, and connecting the hot air supply device to the pipeline heating device;

[0023] Step S2, the hot air supply device is operated, the hot air generated by the hot air supply device is sent into the pipe heating device through the heat supply pipe, the hot air in the pipe heating device flows back to the hot air supply device through the heat supply return pipe, a hot air circulation is formed between the hot air supply device and the pipe heating device, and the pre-buried pipe is heated and anti-freeze treated by the hot air circulated in the pipe heating device.

[0024] It can be seen from the above technical scheme that the pre-buried pipe antifreeze device and method provided by the present invention, through the structural design of the pipe heating device and the hot air supply device, the pipe heating device is arranged on the outer wall of the pre-buried pipe, and the pipe heating device is connected to the hot air supply device located on the surface through the air inlet pipe and the air outlet pipe. The operation process is completed by controlling the hot air supply device arranged on the surface, thereby realizing the surface antifreeze operation; the hot air generated by the hot air supply device enters the pipe heating device through the heat supply pipe, and is then sent back to the hot air supply device through the heat return pipe, forming a hot air circulation, saving energy; the circulating heat flow in the pipe heating device is used to heat and antifreeze the pre-buried pipe, and the heating and antifreeze effect is good; and it is not affected by the underground environment, and can effectively solve the problem of freezing and swelling of the pipe liquid.

[0025] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0027] Figure 1 Schematic diagram of the structure of the pre-buried pipeline antifreeze device according to an embodiment of the present invention;

[0028] Figure 2 is a side cross-sectional view of a pipeline heating device according to an embodiment of the present invention;

[0029] Figure 3is a schematic structural diagram of a middle section air duct according to an embodiment of the present invention;

[0030] Figure 4 The figure is a flow chart of a method for antifreezing a pre-buried pipeline according to an embodiment of the present invention.

[0031] In the accompanying drawings, 1-pipe heating device, 11-air inlet straight pipe, 111-sealed end of the air inlet straight pipe, 12-air outlet straight pipe, 121-sealed end of the air outlet straight pipe, 13-middle section air duct, 131-air duct straight pipe, 132-third elbow, 14-air inlet pipe, 15-air outlet pipe, 16-first elbow, 17-second elbow, 18-insulation pipe sleeve, 181-air inlet straight pipe fixing groove, 182-air outlet straight pipe fixing groove, 183-middle section air duct fixing groove, 184-insulation filler, 185-zipper, 186-flexible cable tie, 21-hot air generating device, 22-heat delivery pipe, 23-heat delivery return pipe, 3-buried pipe, 4-inner thread, 5-connecting thread, 6-thermostat, 7-power supply.

[0032] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0033] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0034] In view of the problem that the above-mentioned prior art lacks an effective solution that can be operated on the surface, is not affected by the underground soil environment, and has a good antifreeze effect on the pre-buried pipes, a pre-buried pipe antifreeze device and method are proposed.

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] In order to illustrate the pre-buried pipeline antifreeze device and method provided by the present invention, Figure 1 The structure of the pre-buried pipeline antifreeze device according to an embodiment of the present invention is shown; Figure 2 The side cross-sectional structure of the pipeline heating device according to an embodiment of the present invention is shown; Figure 3 The structure of the middle section air duct according to an embodiment of the present invention is shown; Figure 4 The flowchart of the pre-buried pipeline antifreezing method according to an embodiment of the present invention is shown.

[0037] like Figures 1 to 4 As shown together, the pre-buried pipeline antifreeze device provided by the present invention includes a pipeline heating device 1 and a hot air supply device; wherein,

[0038] The pipe heating device includes an air inlet straight pipe 11, an air outlet straight pipe 12 and a middle section air pipe 13 which are arranged along the length direction of the pre-buried pipe 3 and are parallel to each other; wherein,

[0039] One end of the air inlet straight tube 11 is a sealed end 111, and the other end is an air outlet end. An air inlet pipe 14 is provided on the upper side wall of the air inlet straight tube 11; one end of the air outlet straight tube 12 is an air inlet end, and the other end is a sealed end 121. An air outlet pipe 15 is provided on the upper side wall of the air outlet straight tube 12;

[0040] The air inlet port and the air outlet port of the middle air duct 13 are respectively connected to the air outlet end of the air inlet end straight pipe 11 through the first elbow 16 and connected to the air inlet end of the air outlet end straight pipe 12 through the second elbow 17;

[0041] The hot air supply device includes a hot air generating device 21, a heat supply pipe 22 arranged at the hot air generating port of the hot air generating device 21, and a heat supply return pipe 23 arranged at the return air port of the hot air generating device 21;

[0042] The heat supply pipe 22 is connected to the air inlet pipe 14 ; the heat supply return pipe 23 is connected to the air outlet pipe 15 .

[0043] Specifically, the straight pipe 11 at the air inlet end and the straight pipe 12 at the air outlet end are preferably arranged at the top of the embedded pipe 3, and the top ends of the air inlet pipe 14 and the air outlet pipe 15 extend out of the ground where the embedded pipe 3 is located, so as to facilitate the connection of the air inlet pipe 14 and the air outlet pipe 15 with the hot air supply device.

[0044] Through the structural design of the pipeline heating device 1 and the hot air supply device, the pipeline heating device 1 is arranged on the outer side wall of the pre-buried pipeline 3, and the pipeline heating device 1 is connected to the hot air supply device located on the surface through the air inlet pipe 14 and the air outlet pipe 15. The operation process is completed by controlling the hot air supply device arranged on the surface, thereby realizing the surface antifreeze operation; the hot air generated by the hot air supply device enters the pipeline heating device 1 through the heat supply pipe 22, and is then sent back to the hot air supply device through the heat return pipe 23, forming a hot air circulation, saving energy; the pre-buried pipeline 3 is heated and antifreeze treated by utilizing the circulating heat flow in the pipeline heating device 1, and the heating antifreeze effect is good; and it is not affected by the underground environment, and can effectively solve the problem of frozen expansion of pipeline liquid.

[0045] As a preferred solution of the present invention, the middle section air duct 13 is a zigzag pipe formed by at least two parallel straight air duct pipes 131 connected in series via a third curved pipe 132 .

[0046] Specifically, the hot air entering from the air inlet pipe 14 enters into the zigzag middle section air duct 13 through the first bend pipe 16, then enters into the air outlet straight pipe 12 through the second bend pipe 17, and finally flows out of the pipe heating device 1 through the air outlet pipe 15. Hot air flows through each air duct straight pipe 131, thereby uniformly heating the side wall of the embedded pipe 3 to prevent the pipe liquid from freezing and swelling.

[0047] It should be noted that the number of straight air ducts 131 included in the middle air duct 13 can be determined according to the area of ​​the outer wall of the actual pre-buried pipeline 3, and the present invention does not make any special limitation on this.

[0048] As a preferred solution of the present invention, the port of the first curved pipe 16 and the air inlet port of the middle air duct 13, the port of the first curved pipe 16 and the air outlet end of the straight pipe 11 at the air inlet end, the port of the second curved pipe 17 and the air outlet port of the middle air duct 13, the port of the second curved pipe 17 and the air inlet end of the straight pipe 12 at the air outlet end, and the port of the straight duct 131 and the port of the third curved pipe 132 are all connected by an inner thread 4.

[0049] Specifically, the two ports of the first curved pipe 16 are respectively connected to the air inlet port of the middle air duct 13 and the air outlet end of the air inlet end straight pipe 11. In order to facilitate the disassembly and assembly between the middle air duct 13 and the air inlet end straight pipe 11, they are connected by providing an inner thread 4. Similarly, the two ports of the second curved pipe 17 are respectively connected to the air outlet port of the middle air duct 13 and the air inlet end of the air outlet end straight pipe 12. In order to facilitate the disassembly and assembly between the middle air duct 13 and the air outlet end straight pipe 12, they are connected by providing an inner thread 4. Similarly, in order to facilitate the disassembly between the air duct straight pipes 131 constituting the middle air duct 13, the third curved pipe 132 used for connecting the air duct straight pipes 131 in series is also connected to the port of the air duct straight pipe 131 by an inner thread 4.

[0050] As a preferred embodiment of the present invention, the pipe heating device 1 further comprises a double-layer heat-insulating pipe sleeve 18 sleeved on the outer wall of the pre-buried pipe 3; an air inlet end straight pipe fixing groove 181, an air outlet end straight pipe fixing groove 182 and a middle section air duct fixing groove 183 are arranged in the interlayer of the double-layer heat-insulating pipe sleeve 18;

[0051] The air inlet straight pipe 11, the air outlet straight pipe 12 and the middle section air pipe 13 are respectively arranged in the air inlet straight pipe fixing groove 181, the air outlet straight pipe fixing groove 182 and the middle section air pipe fixing groove 183.

[0052] Specifically, the embedded pipe 3 can be insulated by setting a double-layer insulation pipe sleeve 18, and the straight pipe fixing groove 181 at the air end, the straight pipe fixing groove 182 at the air outlet end and the middle air duct fixing groove 183 are used to facilitate the installation of the straight pipe 11 at the air inlet end, the straight pipe 12 at the air outlet end and the middle air duct 13 in the insulation pipe sleeve 18, thereby insulating the hot air circulating in the straight pipe 11 at the air inlet end, the straight pipe 12 at the air outlet end and the middle air duct 13.

[0053] As a preferred solution of the present invention, thermal insulation fillers 184 are provided in the interlayer of the double-layer thermal insulation pipe sleeve 18, between the straight pipe fixing groove 181 at the air inlet end and the straight pipe fixing groove 182 at the air outlet end, between the straight pipe fixing groove 182 at the air outlet end and the middle air duct fixing groove 183, and between the straight pipe fixing groove 181 at the air inlet end and the middle air duct fixing groove 13.

[0054] Specifically, by providing the insulation filler 184, the gaps between the air inlet end straight pipe fixing groove 181, the air outlet end straight pipe fixing groove 182 and the middle section air duct fixing groove 183 in the insulation pipe sleeve 18 are insulated, so that the insulation effect is better.

[0055] As a preferred solution of the present invention, a zipper 185 is provided on the heat-insulating pipe sleeve 18 along the length direction of the pre-buried pipe 3. The zipper 185 is provided to facilitate the installation and removal of the heat-insulating pipe sleeve 18 on the pre-buried pipe 3.

[0056] As a preferred solution of the present invention, a flexible tie 186 is provided on both end sleeves of the thermal insulation pipe sleeve 18. The flexible tie 186 makes the two ends of the thermal insulation pipe sleeve 18 close and seal the two ends of the embedded pipeline 3 to increase the thermal insulation effect.

[0057] As a preferred solution of the present invention, the heat supply pipe 22 and the hot air generating port of the hot air generating device 21, the heat supply pipe 22 and the air inlet pipe 14, the heat supply return pipe 23 and the air return port of the hot air generating device 21, and the heat supply return pipe 23 and the air outlet pipe 15 are all connected by connecting threads 5. The connecting threads 5 make it easier to disassemble and assemble the hot air generating device 21 and the pipe heating device 1.

[0058] As a preferred embodiment of the present invention, the hot air generating device 21 is a hot air blower, and a temperature controller 6 is provided on the hot air generating device. The hot air generating device 21 is preferably, but not limited to, a hot air blower, and the hot air blower is connected to a power source 7, and the hot air generating device 21 is adjusted to maintain a set temperature by providing the temperature controller 6.

[0059] The method for preventing freezing of pre-buried pipes provided by the present invention is characterized in that the pre-buried pipes 3 are prevented from freezing by using the pre-buried pipes anti-freezing device provided by the present invention as described above, comprising the following steps:

[0060] Step S1, surround the pipeline heating device 1 on the outer side wall of the pre-buried pipeline 3, and connect the hot air supply device to the pipeline heating device 1;

[0061] Step S2, the hot air supply device 21 is operated, the hot air generated by the hot air supply device 21 is sent into the pipe heating device 1 through the heat supply pipe 22, the hot air in the pipe heating device 1 flows back to the hot air supply device through the heat return pipe 23, a hot air circulation is formed between the hot air supply device and the pipe heating device 1, and the embedded pipe 3 is heated and antifreeze treated by the hot air circulated in the pipe heating device 1.

[0062] Specifically, first, the air inlet straight pipe 11, the air outlet straight pipe 12, and the air duct straight pipe 131 constituting the middle air duct 13 are correspondingly inserted into the air end straight pipe fixing groove 181, the air outlet straight pipe fixing groove 182, and the middle air duct fixing groove 183 of the thermal insulation sleeve 18, and the two ends of the first curved pipe 16 are respectively connected to the air inlet straight pipe 11 and the middle air duct 13 through the inner thread 4, and the two ends of the second curved pipe 17 are respectively connected to the middle air duct 13 and the air outlet straight pipe 12 through the inner thread 4, and the two ends of the third curved pipe 132 are connected to the air duct straight pipe 131 constituting the middle air duct 13 through the inner thread 4, so that the air end straight pipe 11, the air outlet straight pipe 12 2 and the middle section air duct 13 form a folded line integral air duct; then, the installed pipe heating device 1 is wrapped around the embedded pipe 3 to be wrapped, and it is closed into a set by the zipper 185; then the heat supply pipe 22 and the heat supply return pipe 23 are respectively connected to the air inlet pipe 14 and the air outlet pipe 15 through the connecting thread 5; finally, the power is turned on, so that the hot air blower blows hot air to the pipe heating device 1, and the thermostat 6 displays the temperature in real time. The airflow of the heating return pipe 23 is returned to the hot air blower for recycling. On the one hand, it has the effect of preventing the pipe from freezing, and on the other hand, it saves energy by recycling the hot air, and the frozen embedded pipe 3 is melted.

[0063] It can be seen from the above specific embodiments that the pre-buried pipe antifreeze device and method provided by the present invention, through the structural design of the pipe heating device and the hot air supply device, the pipe heating device is arranged on the outer wall of the pre-buried pipe, and the pipe heating device is connected to the hot air supply device located on the surface through the air inlet pipe and the air outlet pipe, and the operation process is completed by controlling the hot air supply device arranged on the surface, thereby realizing the surface antifreeze operation; the hot air generated by the hot air supply device enters the pipe heating device through the heat supply pipe, and is then sent back to the hot air supply device through the heat return pipe, forming a hot air circulation, saving energy; the circulating heat flow in the pipe heating device is used to heat the pre-buried pipe for antifreeze treatment, and the heating antifreeze effect is good; and it is not affected by the underground environment, and can effectively solve the problem of freezing and swelling of the pipe liquid.

[0064] As described above, the pre-buried pipe antifreeze device and method according to the present invention are described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the pre-buried pipe antifreeze device and method according to the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A pre-buried pipeline antifreeze device, characterized in that: It includes a pipeline heating device and a hot air supply device; wherein, The pipeline heating device comprises an air inlet straight pipe, an air outlet straight pipe and a middle section air duct which are arranged along the length direction of the pre-buried pipeline and are parallel to each other; wherein, One end of the straight tube at the air inlet end is a sealed end, and the other end is an air outlet end, and an air inlet pipe is arranged on the upper side wall of the straight tube at the air inlet end; one end of the straight tube at the air outlet end is an air inlet end, and the other end is a sealed end, and an air outlet pipe is arranged on the upper side wall of the straight tube at the air outlet end; The air inlet port and the air outlet port of the middle air duct are respectively connected to the air outlet end of the air inlet end straight pipe through the first elbow pipe and connected to the air inlet end of the air outlet end straight pipe through the second elbow pipe; The hot air supply device comprises a hot air generating device, a heat supply pipe arranged at a hot air generating port of the hot air generating device, and a heat supply return pipe arranged at a return air port of the hot air generating device; The heat delivery pipe is connected to the air inlet pipe; The heat supply return pipe is connected to the air outlet pipe.

2. The pre-buried pipeline antifreeze device according to claim 1, characterized in that: The middle section of the air duct is a zigzag pipe formed by at least two parallel straight air duct pipes connected in series via a third bend pipe.

3. The pre-buried pipeline antifreeze device according to claim 2, characterized in that: The port of the first curved pipe and the air inlet port of the middle air duct, the port of the first curved pipe and the air outlet end of the straight pipe at the air inlet end, the port of the second curved pipe and the air outlet port of the middle air duct, the port of the second curved pipe and the air inlet end of the straight pipe at the air outlet end, and the port of the straight pipe of the air duct and the port of the third curved pipe are all connected by internal threads.

4. The pre-buried pipeline antifreeze device according to claim 1, characterized in that: The pipeline heating device also includes a double-layer insulation pipe sleeve sleeved on the outer wall of the pre-buried pipeline; an air inlet end straight pipe fixing groove, an air outlet end straight pipe fixing groove and a middle section air duct fixing groove are arranged in the interlayer of the double-layer insulation pipe sleeve; The straight pipe at the air inlet end, the straight pipe at the air outlet end and the middle section air duct are respectively arranged in the straight pipe fixing groove at the air inlet end, the straight pipe fixing groove at the air outlet end and the middle section air duct fixing groove.

5. The pre-buried pipeline antifreeze device according to claim 4, characterized in that: In the interlayer of the double-layer insulation pipe sleeve, insulation fillers are arranged between the straight pipe fixing groove at the air inlet end and the straight pipe fixing groove at the air outlet end, between the straight pipe fixing groove at the air outlet end and the middle air duct fixing groove, and between the straight pipe fixing groove at the air inlet end and the middle air duct fixing groove.

6. The pre-buried pipeline antifreeze device according to claim 4, characterized in that: A zipper is arranged on the thermal insulation pipe sleeve along the length direction of the pre-buried pipeline.

7. The pre-buried pipeline antifreeze device according to claim 4, characterized in that: Both end sleeve openings of the thermal insulation pipe sleeve are provided with flexible tie ties.

8. The pre-buried pipeline antifreeze device according to claim 1, characterized in that: The heat supply pipe and the hot air generating port of the hot air generating device, the heat supply pipe and the air inlet pipe, the heat supply return pipe and the air return port of the hot air generating device, and the heat supply return pipe and the air outlet pipe are all connected by connecting threads.

9. The pre-buried pipeline antifreeze device according to claim 1, characterized in that: The hot air generating device is a hot air blower; A temperature controller is arranged on the hot air generating device.

10. A method for preventing freezing of preburied pipelines, characterized in that: The method of antifreezing the pre-buried pipeline using the pre-buried pipeline antifreeze device according to any one of claims 1 to 9 comprises the following steps: Step S1, surrounding the pipeline heating device on the outer side wall of the pre-buried pipeline, and connecting the hot air supply device to the pipeline heating device; Step S2, the hot air supply device is operated, the hot air generated by the hot air supply device is sent into the pipe heating device through the heat supply pipe, the hot air in the pipe heating device flows back to the hot air supply device through the heat supply return pipe, a hot air circulation is formed between the hot air supply device and the pipe heating device, and the pre-buried pipe is heated and anti-freeze treated by the hot air circulated in the pipe heating device.

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