Frozen soil roadbed hot rod

Abstract

The utility model discloses a frozen soil roadbed heating rod which comprises a hollow main pipe, liquid ammonia is filled in the main pipe, a plurality of detachable condensation teeth are arranged in the circumferential direction of the main pipe, the condensation teeth are communicated with the interior of the main pipe, and a stabilizing ball and a liquid storage bin are sequentially arranged at the lower end of the main pipe. By arranging the detachable condensation teeth and the heat conduction pipes, a certain number of condensation teeth or heat conduction pipes can be installed according to the geographical environment and the temperature environment, cost is saved, and meanwhile the good cooling effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat rods, in particular to a heat rod for frozen soil roadbed. Background Art

[0002] The heat rod is a highly efficient heat-conducting device made of seamless carbon steel pipe, buried five meters underground with two meters exposed. It features unique one-way heat transfer: heat can only be transferred from the lower end to the upper end, not in the reverse direction. In winter, the working medium in the heat pipe changes from liquid to gas, dissipating the heat within the pipe; in summer, the heat rod ceases operation.

[0003] The upper portion of the heat rod (heat release section) is equipped with fins, while the lower portion (heat absorption section) is buried directly in the permafrost. In the permafrost zone of the Qinghai-Tibet Railway, the ambient temperature remains lower than the permafrost surrounding the heat absorption section for extended periods. The liquid working fluid in the heat rod absorbs heat from the permafrost and evaporates into gas. Driven by the pressure differential within the tube, the vapor flows upward along the central channel of the heat rod to the upper portion. Upon encountering the cooler tube wall, it releases its latent heat of vaporization and condenses into liquid. Under the influence of gravity, the vapor flows back along the tube wall to the heat absorption section, where it evaporates again. This cycle continuously transfers cold energy from the natural atmosphere to the permafrost in the foundation. Due to the one-way heat transfer characteristic of the heat rod, summer heat from the atmosphere is prevented from transferring through the rod to the permafrost.

[0004] The heat rods' unidirectional cooling function allows them to store a large amount of cold in the permafrost layer in winter, preventing it from melting in summer and forming a "permafrost layer" that strengthens the permafrost. However, existing heat rods are fixed structures, which have limitations in their use in different environments, making them less effective. Utility Model Content

[0005] The purpose of the utility model is to provide a frozen soil roadbed heat rod, which can increase or reduce the components of the heat rod according to different geographical environments and temperature conditions, so as to effectively prevent the railway and highway with frozen soil as the roadbed from thawing and sinking during operation.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A frozen soil roadbed heat rod comprises a hollow main pipe filled with liquid ammonia or other media, a plurality of detachable condensation teeth are arranged around the circumference, the condensation teeth are connected to the interior of the main pipe, and a stabilizing ball and a liquid storage tank are arranged in sequence at the lower end of the main pipe.

[0008] In a specific embodiment, the condensation teeth are condensation tubes or condensation sheets, and can also be designed into tooth-like structures to increase the contact surface with the air.

[0009] In a specific embodiment, the condenser tube includes a hollow threaded section, one end of which is fixedly connected to the hollow inner tube, and the other end is obliquely connected to the main tube, so as to facilitate the rapid flow of liquefied ammonia in the condenser tube into the main tube.

[0010] In a specific embodiment, the condensing sheet includes a hollow threaded section, one end of which is fixedly connected to a hollow sector sheet, and the other end is obliquely connected to the main pipe, so as to facilitate the rapid flow of liquefied ammonia in the condensing sheet into the main pipe.

[0011] In a specific embodiment, the inner wall of the sector piece is provided with a guide groove, and under the action of the guide groove, the liquefied liquid ammonia can quickly flow into the main pipe.

[0012] In a specific embodiment, the main pipe includes a hollow liquid ammonia pipe, which is evenly provided with insertion holes and is wrapped with a main pipe protective sleeve on the outside to prevent substances in the soil from corroding the main pipe and causing liquid ammonia leakage.

[0013] In a specific embodiment, a plurality of detachable heat-conducting pipes are provided on the main pipe between the stabilizing ball and the liquid storage tank, and the heat-conducting pipes are communicated with the main pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The condensing teeth and heat conducting pipes of the present invention are both detachable, so a certain amount of condensing teeth and heat conducting pipes can be installed according to the geographical environment and temperature environment, which saves costs and has a good cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the main body of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the condenser tube of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the condenser sheet of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the fan-shaped piece of the utility model;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the connection between the main pipe and the condensing teeth of the utility model;

[0022] Figure 7 This is a structural diagram of the second embodiment of the present utility model.

[0023] In the figure: 1. main pipe, 2. condensing teeth, 3. liquid storage tank, 4. protective shell, 5. threaded section, 6. insertion hole, 7. liquid ammonia pipe, 8. main pipe protective cover, 9. inner pipe, 10. guide groove, 11. fan-shaped piece, 12. stabilizing ball, 13. heat pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example 1:

[0026] See also Figure 1-Figure 7 A frozen soil roadbed heat rod comprises a hollow main pipe 1 filled with a medium such as liquid ammonia, though methane or carbon dioxide can also be used. Multiple insertion holes 6 are evenly and obliquely arranged around the circumference of the main pipe. Each insertion hole 6 is equipped with condensation teeth 2, which communicate with the interior of the main pipe 1. This allows for a specific number of condensation teeth 2 to be installed on the main pipe 1, depending on the geographical and temperature environment. If the frozen soil is not strong enough, more condensation teeth 2 can be installed. If the frozen soil of a highway or railway subgrade is strong enough, fewer condensation teeth 2 can be installed, saving costs. If no condensation teeth 2 are installed on the insertion holes 6, a sealing cap is used to prevent liquid ammonia leakage.

[0027] The condensation tooth 2 can adopt a variety of structures. In a specific embodiment, the condensation tooth 2 is a condensation tube, including a hollow threaded section 5, one end of the threaded section 5 is fixedly connected to a hollow inner tube 9, and the other end is connected to the main tube 1 through a tube hole 6.

[0028] In a specific embodiment, the condensing teeth 2 are condensing sheets, which include a hollow threaded section 5, one end of which is fixedly connected to a hollow sector-shaped sheet 11, and the other end of which is connected to the main pipe 1 through a pipe insertion hole 6. The inner wall of the sector-shaped sheet 11 is provided with a guide groove 10 to facilitate the flow of liquefied liquid ammonia in the sector-shaped sheet 11.

[0029] The insertion hole 6 is provided with a thread matching the threaded section 5 , and the threaded section 5 is sleeved with a sealing ring to prevent liquid ammonia leakage after connection.

[0030] The outer surface of the main pipe 1 is covered with a main pipe protective sleeve 8 to prevent soil corrosion and liquid ammonia leakage. The inner pipe 9 of the condenser pipe and the sector-shaped pieces 11 of the condenser sheet are both wrapped with a protective outer shell 4. Both the main pipe protective sleeve 8 and the protective outer shell 4 effectively prevent soil corrosion and liquid ammonia leakage from the main pipe or condenser teeth 2.

[0031] The lower end of the main pipe 1 is provided with a stabilizing ball 12 and a liquid storage tank 3 in sequence. The stabilizing ball 12 is a hollow sphere, and the inner cavity of the sphere is connected to the interior of the main pipe 1. When the utility model is vertically buried in frozen soil, the stabilizing ball 12 plays a certain stabilizing role and can effectively prevent the utility model from tilting.

[0032] Example 2

[0033] like Figure 1 As shown, to increase the effective area of ​​the heat rod and improve the strength of the frozen soil, one or more annular, detachable heat pipes 13 are installed on the main pipe 1 between the stabilizing ball 12 and the liquid storage tank 3. The heat pipes 13 are connected to the interior of the main pipe 1 through a conduit. The heat pipes 13 include an annular, hollow heat-conducting ring and a hollow mounting pipe for connecting to the main pipe. The mounting pipe is detachably connected between the main pipe 1 and the heat-conducting ring. This design facilitates the installation of the heat rod in frozen soil.

[0034] During use, the present invention is buried as a whole in frozen soil, with the portion below the stabilizing ball 12 buried in the permafrost layer, and the portion above the stabilizing ball 12 buried in the freeze-thaw layer or the replacement layer (the portion exposed above the ground is prior art and is not shown). When installing the present invention, first insert the main pipe 1 and the main pipe protective sleeve 8 into the stratum (if a heat pipe 13 is required, the heat pipe 13 is placed on the main pipe). The soil is compacted with a compacting device every 30 cm of filling. Since the condensing teeth 2 and the heat pipe 13 are removable, the soil is inserted into the condensing teeth 2 or the heat pipe 13 is installed every 30 cm of filling, and then the soil is compacted (with weak frost heave or no frost heave filler on the top) until the installation is complete. The number of condensing teeth 2 and heat pipes 13 installed can be determined according to the installation location of the heat rod or the temperature of the frozen soil.

[0035] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A frozen soil roadbed heat rod, characterized in that: The invention comprises a hollow main pipe (1), wherein the main pipe (1) is filled with liquid ammonia and a plurality of detachable condensation teeth (2) are arranged around the main pipe. A stabilizing ball (12) and a liquid storage tank (3) are sequentially arranged at the lower end of the main pipe (1).

2. A frozen soil roadbed heat rod according to claim 1, characterized in that: The condensation teeth (2) are condensation tubes or condensation sheets.

3. A frozen soil roadbed heat rod according to claim 2, characterized in that: The condenser tube comprises a hollow threaded section (5), one end of the threaded section (5) is fixedly connected to a hollow inner tube (9), and the other end is connected to the main tube (1).

4. The frozen soil roadbed heat rod according to claim 2, characterized in that: The condensing plate comprises a hollow threaded section (5), one end of the threaded section (5) is fixedly connected to a hollow sector-shaped plate (11), and the other end is connected to the main pipe (1).

5. The frozen soil roadbed heat rod according to claim 4, characterized in that: The inner wall of the sector-shaped piece (11) is provided with a guide groove (10).

6. The frozen soil roadbed heat rod according to claim 1, characterized in that: The main pipe (1) comprises a hollow liquid ammonia pipe (7), the liquid ammonia pipe (7) is evenly provided with pipe insertion holes (6), and the outer side is wrapped with a main pipe protective sleeve (8).

7. The frozen soil roadbed heat rod according to claim 1, characterized in that: A plurality of detachable heat-conducting pipes (13) are provided on the main pipe (1) between the stabilizing ball (12) and the liquid storage tank (3), and the heat-conducting pipes (13) are in communication with the main pipe (1).

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