Pipe body inner wall flow sensing structure, hot rod structure and pipe body inner wall flow sensing device

Abstract

The utility model provides a technical scheme of a pipe body inner wall flow sensing structure, a hot rod structure and a pipe body inner wall flow sensing device. The flow sensing structure comprises a first frame body used for being arranged in an external pipe body, a ventilation structure is arranged on the first frame body, and the outer wall of the first frame body is used for being tightly attached to the inner wall of the external pipe body; the annular liquid collecting tank is arranged at the upper end of the first frame body and is used for receiving liquid which flows downwards due to condensation on the inner wall of an external pipe body; the liquid guide part is arranged on the first frame body, and one end of the liquid guide part is communicated with the annular liquid collecting tank; the runner is arranged at the lower end of the first frame body; the first magnetic part is arranged on the rotating wheel; dropping liquid at an outlet of the liquid guide part penetrates through the ventilation structure to fall onto the rotating wheel, and the rotating wheel is used for rotating under the action of the dropping liquid of the liquid guide part to drive the first magnetic part to rotate. According to the technical scheme, the flow state of the fluid on the inner wall of the closed pipe body can be converted into externally detectable physical factors, and induction monitoring of the flow state of the fluid on the inner wall of the outer pipe body is achieved.

Description

Technical Field

[0001] This utility model relates to a flow sensing structure, specifically a flow sensing structure for the inner wall of a pipe, belonging to the field of flow monitoring technology. This utility model also relates to a frozen soil heat pipe structure; and further relates to a flow sensing device for the inner wall of a pipe. Background Technology

[0002] With global warming, the stability of permafrost is crucial for its development and utilization, such as for roads, bridges, and buildings. Currently, permafrost is typically treated using heat pipes to make it freeze harder in winter and thaw more slowly in summer, thus maintaining a certain level of stability during the summer months.

[0003] Currently, all heat pipes are sealed structures, making it difficult to obtain information about the internal fluid flow from the outside, such as whether there is flow or the flow rate.

[0004] Therefore, how to provide a flow sensing structure for the inner wall of a pipe that can transform the flow state of the fluid inside the closed pipe into an externally detectable physical factor, and realize the sensing and monitoring of the flow state of the fluid inside the outer pipe, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to transform the fluid flow state inside the closed pipe into an externally detectable physical factor, so as to realize the sensing and monitoring of the fluid flow state inside the external pipe.

[0006] According to the first embodiment of this utility model, a flow sensing structure for the inner wall of a pipe is provided:

[0007] A flow sensing structure for the inner wall of a pipe includes: a first frame for mounting inside an outer pipe, the first frame having a venting structure, and the outer wall of the first frame for tightly fitting against the inner wall of the outer pipe; an annular liquid collecting groove at the upper end of the first frame for collecting liquid flowing down the inner wall of the outer pipe due to condensation; a liquid guiding section on the first frame, one end of the liquid guiding section communicating with the annular liquid collecting groove; a rotating wheel at the lower end of the first frame, the rotating wheel being located below the liquid guiding section; and a first magnetic part mounted on the rotating wheel; wherein, droplets at the outlet of the liquid guiding section pass through the venting structure and fall onto the rotating wheel, the rotating wheel rotating under the action of the droplets from the liquid guiding section, thereby driving the first magnetic part to rotate.

[0008] Furthermore, in a more preferred embodiment of this utility model, the rotating wheel includes: a rotating wheel body and a rotating shaft; the rotating wheel body is mounted on the first frame via the rotating shaft; the rotating wheel body is provided with a liquid-collecting tank, which is arranged in a circular array on the rotating wheel body, and the liquid-collecting tank is used to receive the dripping liquid from the liquid guiding part; wherein, the liquid-collecting tank receives the dripping liquid on one side of the rotating shaft, and discharges the dripping liquid when the liquid-collecting tank rotates to the other side of the rotating shaft.

[0009] Furthermore, in a more preferred embodiment of this utility model, the rotating body includes: a rotating body, which is cylindrical; a liquid-holding structure, wherein a plurality of liquid-holding structures are arranged in a ring array on the outer cylindrical wall of the rotating body, the liquid-holding structure having an arc-shaped external structure, the cross-sectional structure of the liquid-holding structure narrowing outward from one end near the rotating body, and the liquid-holding structure and the rotating body being an integral structural design; and a rotating body end cap, which is installed on both end faces of the rotating body; the rotating body end cap and the liquid-holding structure constitute the liquid-holding tank.

[0010] Furthermore, in a more preferred embodiment of the present invention, the first magnetic part is disposed on the liquid-containing structure, and the first magnetic part is located on the side of the liquid-containing structure away from the rotating body.

[0011] Furthermore, in a more preferred embodiment of the present invention, the first magnetic part is disposed on the rotating end cover, and the first magnetic part is located on the side of the rotating end cover away from the rotating body.

[0012] Furthermore, as a more preferred embodiment of this utility model, in the rotating state, the first magnetic part generates a periodically changing magnetic field.

[0013] Furthermore, in a more preferred embodiment of the present invention, the number of the first magnetic parts is two or more, and the two or more first magnetic parts are arranged in a ring array on the rotating wheel.

[0014] Furthermore, in a more preferred embodiment of this utility model, the number of the ventilation structures is two or more.

[0015] Furthermore, in a more preferred embodiment of this utility model, the number of ventilation structures is one, and the first frame is a cylindrical structure.

[0016] Furthermore, in a more preferred embodiment of this utility model, a sealing ring structure for filling the sealing gap is provided on the outer wall of the first frame; preferably, the number of the sealing ring structures is two or more.

[0017] Furthermore, as a more preferred embodiment of this utility model, a first ring is provided on the upper end face of the first frame, the outer diameter of the first ring is smaller than the inner diameter of the inner wall of the external heat pipe, and the first ring and the upper end face of the first frame constitute the annular liquid collection tank.

[0018] Furthermore, in a more preferred embodiment of this utility model, the liquid guiding part is a conduit structure, and the liquid guiding part is fixedly mounted on the first frame.

[0019] Furthermore, as a more preferred embodiment of the present invention, it includes: a second magnetic part disposed on the first frame 1, the second magnetic part being located on one side of the first magnetic part, the second magnetic part being used to attract the first magnetic part and constrain the rotation state of the first magnetic part.

[0020] Furthermore, in a more preferred embodiment of the present invention, the second magnetic part is located directly below or directly above the rotation path of the first magnetic part.

[0021] Furthermore, in a more preferred embodiment of this utility model, the first torque generated by the adsorption force between the second magnetic part and the first magnetic part on the rotating wheel is less than the second torque generated by the fully loaded droplet on the rotating wheel.

[0022] According to a second embodiment of this utility model, a frozen soil heat pipe structure is provided:

[0023] A permafrost heat pipe structure includes: a heat pipe tube; and the aforementioned flow sensing structure disposed within the inner wall of the heat pipe tube.

[0024] According to a third embodiment of this utility model, a flow sensing device for the inner wall of a pipe is provided:

[0025] A flow sensing device for the inner wall of a pipe includes: the aforementioned flow sensing structure disposed inside the pipe body; and a magnetic field change monitoring sensor disposed outside the pipe body.

[0026] Furthermore, in a more preferred embodiment of this utility model, the magnetic field change monitoring sensor is a Hall sensor.

[0027] Compared with the prior art, the present application provides a solution for a flow sensing structure on the inner wall of a pipe, which realizes the detection and monitoring of the fluid flow state inside the outer pipe by setting the flow sensing structure on the inner wall of the pipe inside the outer pipe. Specifically, by placing the first frame inside the outer tube and ensuring its outer wall is tightly fitted to the inner wall of the outer tube, fluid inside the outer tube is prevented from flowing through the outer wall of the first frame, thus collecting all fluid flowing down the inner wall of the outer tube into an annular collection tank. Furthermore, the annular collection tank collects the fluid from the inner wall of the outer tube, and the collected fluid flows out from a designated location via a guide section. The fluid flowing out from the designated location drips downwards under gravity, acting on a rotating wheel, causing the wheel to rotate. Ultimately, the rotation of the wheel drives the first magnetic section to rotate, which rotates along a certain trajectory, causing regular fluctuations in the external magnetic field. This transforms the information about the falling motion of the fluid inside the outer tube into information about the periodic rotation of the magnetic field of the first magnetic section, making it possible to detect the fluid inside the sealed tube. The technical solution provided in this application can transform the flow state of the fluid inside the sealed tube into an externally detectable physical factor, enabling the sensing and monitoring of the flow state of the fluid inside the outer tube. Attached Figure Description

[0028] Figure 1 This is an overall structural diagram of the flow sensing structure on the inner wall of the pipe in an embodiment of this utility model;

[0029] Figure 2 This is a structural diagram of the first frame in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the rotary wheel in an embodiment of this utility model;

[0031] Figure 4 This is a structural diagram of the wheel body in an embodiment of this utility model;

[0032] Figure 5 This is a schematic diagram showing the first magnetic part disposed on the rotating wheel in an embodiment of the present invention;

[0033] Figure 6 This is a three-dimensional view of the flow sensing structure on the inner wall of the pipe in an embodiment of this utility model;

[0034] Figure 7 This is a three-dimensional exploded view of the internal structure of the rotor in an embodiment of this utility model;

[0035] Figure 8 This is a schematic diagram showing the position of the second magnetic part in an embodiment of this utility model.

[0036] Figure label:

[0037] Heating pipe A; First frame 1; Ventilation structure 101; Sealing ring structure 102; First ring 103; Annular liquid collection tank 2; Liquid guiding part 3; Rotating wheel 4; Rotating wheel body 401; Rotating body 401a; Liquid holding structure 401b; Rotating body end cap 401c; Rotating shaft 402; Liquid holding tank 403; First magnetic part 501; Second magnetic part 502. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0040] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0042] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0043] According to the first embodiment of this utility model, a flow sensing structure for the inner wall of a pipe is provided:

[0044] A flow sensing structure for the inner wall of a pipe includes: a first frame 1 for mounting inside an outer pipe, the first frame 1 having a venting structure 101, the outer wall of the first frame 1 being tightly fitted to the inner wall of the outer pipe; an annular liquid collecting groove 2 mounted on the upper end of the first frame 1, the annular liquid collecting groove 2 being used to collect liquid flowing down the inner wall of the outer pipe due to condensation; a liquid guiding part 3 mounted on the first frame 1, one end of the liquid guiding part 3 being connected to the annular liquid collecting groove 2; a rotating wheel 4 mounted on the lower end of the first frame 1, the rotating wheel 4 being located below the liquid guiding part 3; and a first magnetic part 501 mounted on the rotating wheel 4; wherein, the droplets at the outlet of the liquid guiding part 3 pass through the venting structure 101 and fall onto the rotating wheel 4, the rotating wheel 4 being used to rotate under the action of the droplets from the liquid guiding part 3, thereby driving the first magnetic part 501 to rotate.

[0045] This application provides a technical solution for a flow sensing structure on the inner wall of a pipe. In this solution, by placing the flow sensing structure on the inner wall of the pipe inside the outer pipe, the flow state of the fluid inside the outer pipe can be detected and monitored. Specifically, by placing the first frame inside the outer tube and ensuring its outer wall is tightly fitted to the inner wall of the outer tube, fluid inside the outer tube is prevented from flowing through the outer wall of the first frame, thus collecting all fluid flowing down the inner wall of the outer tube into an annular collection tank. Furthermore, the annular collection tank collects the fluid from the inner wall of the outer tube, and the collected fluid flows out from a designated location via a guide section. The fluid flowing out from the designated location drips downwards under gravity, acting on a rotating wheel, causing the wheel to rotate. Ultimately, the rotation of the wheel drives the first magnetic section to rotate, which rotates along a certain trajectory, causing regular fluctuations in the external magnetic field. This transforms the information about the falling motion of the fluid inside the outer tube into information about the periodic rotation of the magnetic field of the first magnetic section, making it possible to detect the fluid inside the sealed tube. The technical solution provided in this application can transform the flow state of the fluid inside the sealed tube into an externally detectable physical factor, enabling the sensing and monitoring of the flow state of the fluid inside the outer tube.

[0046] It should be noted that in one application scenario of this application, the outer tube is a heat pipe.

[0047] Specifically, in this embodiment of the present invention, the rotating wheel 4 includes: a rotating wheel body 401 and a rotating shaft 402; the rotating wheel body 401 is mounted on the first frame 1 via the rotating shaft 402; the rotating wheel body 401 is provided with a liquid-collecting tank 403, which is arranged in a circular array on the rotating wheel body 401, and the liquid-collecting tank 403 is used to receive the dripping liquid from the liquid guiding part 3; wherein, the liquid-collecting tank 403 receives the dripping liquid on one side of the rotating shaft 402, and discharges the dripping liquid when the liquid-collecting tank 403 rotates to the other side of the rotating shaft 402.

[0048] It should be noted that in this embodiment, the rotor body is mounted on the first frame via a rotating shaft, enabling the rotor to rotate on the first frame. Furthermore, the liquid-collecting tanks are arranged in a ring array on the rotor body, ensuring that regardless of the rotor's rotation angle, the dripping liquid acts on the rotor, achieving complete collection of the liquid dripping from the guide section. Furthermore, when the liquid-collecting tank rotates to the other side with the rotor body, the dripping liquid is discharged from the tank. This ensures that at any given moment, the rotor can rotate in real time due to the gravitational difference in the dripping liquid on both sides of the rotating shaft. This achieves complete sensing and monitoring of the fluid inside the external pipe.

[0049] Specifically, in this embodiment of the present invention, the rotating body 401 includes: a rotating body 401a, which is cylindrical; a liquid-holding structure 401b, wherein a plurality of liquid-holding structures 401b are arranged in a ring array on the outer circular wall of the rotating body 401a, the liquid-holding structure 401b having an arc-shaped external structure, the cross-sectional structure of the liquid-holding structure 401b narrowing outward from one end near the rotating body 401a, and the liquid-holding structure 401b and the rotating body 401a being an integral structural design; and a rotating body end cap 401c, which is installed on both end faces of the rotating body 401a; the rotating body end cap 401c and the liquid-holding structure 401b constitute the liquid-holding tank 403.

[0050] It should be noted that by setting a liquid-holding structure in a ring on the rotating body, and by ensuring a tight fit between the rotating body's end cap and the liquid-holding structure, a liquid-holding tank is formed. This solution is relatively simple to manufacture and easy to install and maintain.

[0051] Specifically, in this embodiment of the present invention, the first magnetic part 501 is disposed on the liquid-containing structure 401b, and the first magnetic part 501 is located on the side of the liquid-containing structure 401b away from the rotating body 401a.

[0052] Specifically, in this embodiment of the present invention, the first magnetic part 501 is disposed on the rotating end cover 401c, and the first magnetic part 501 is located on the side of the rotating end cover 401c away from the rotating body 401a.

[0053] It should be noted that in the two embodiments described above, the first magnetic part is located in different positions. In the first embodiment, the first magnetic part is located on the side / end of the liquid-containing structure away from the rotating body, and the annular path of the first magnetic part is the largest, resulting in a more obvious change in the magnetic field. In the second embodiment, the first magnetic part is located at the end of the rotating body cap away from the rotating body, and the first magnetic part does not occupy the radial space of the rotating wheel body, so that the entire scheme can be set in a tube with a smaller diameter.

[0054] Specifically, in this embodiment of the invention, the first magnetic part 501 generates a periodically changing magnetic field in the rotating state.

[0055] It should be noted that when the flow rate of the dripping fluid is large, the speed of the impeller is fast, the change cycle of the first magnetic part is fast, and the speed of the fluid detected externally is large.

[0056] Specifically, in this embodiment of the present invention, the number of the first magnetic parts 501 is two or more, and the two or more first magnetic parts 501 are arranged in a ring array on the rotating wheel 4.

[0057] Specifically, in this embodiment of the invention, the number of ventilation structures 101 is two or more.

[0058] Specifically, in this embodiment of the utility model, the number of ventilation structures 101 is one, and the first frame 1 has a cylindrical structure.

[0059] Specifically, in this embodiment of the present invention, a sealing ring structure 102 for filling the sealing gap is provided on the outer wall of the first frame 1.

[0060] Specifically, in this embodiment of the invention, the number of sealing ring structures 102 is two or more.

[0061] Specifically, in this embodiment of the present invention, a first ring 103 is provided on the upper end face of the first frame 1. The outer diameter of the first ring 103 is smaller than the inner diameter of the inner wall of the external heat pipe. The first ring 103 and the upper end face of the first frame 1 constitute the annular liquid collection tank 2.

[0062] Specifically, in this embodiment of the present invention, the liquid guiding part 3 is a conduit structure, and the liquid guiding part 3 is fixedly mounted on the first frame 1.

[0063] Specifically, in this embodiment of the utility model, it includes: a second magnetic part 502 disposed on the first frame 1, the second magnetic part 502 being located on one side of the first magnetic part 501, the second magnetic part 502 being used to attract the first magnetic part 501 and constrain the rotation state of the first magnetic part 501.

[0064] It should be noted that the second magnetic part has an attractive force on the first magnetic part due to the attraction between opposite poles. Under the action of the second magnetic part, when each of the first magnetic parts rotates to be closest to the second magnetic part, it experiences rotational resistance under the attraction force of the second magnetic part, thus making it difficult for the rotor to rotate. The rotor only rotates when the gravitational force of the dripping liquid / liquid on the rotor is greater than the rotational resistance, thereby achieving accurate statistics of the flow rate on the inner wall of the tube.

[0065] Specifically, in this embodiment of the invention, the second magnetic part 502 is located directly below or directly above the rotation path of the first magnetic part 501.

[0066] Specifically, in this embodiment of the invention, the first torque generated by the adsorption force of the second magnetic part 502 and the first magnetic part 501 on the rotating wheel 4 is less than the second torque generated by the fully loaded droplet on the rotating wheel 4.

[0067] It should be noted that, under the condition that the first torque is less than the second torque, once the liquid-collecting tank on the rotor is full of dripping liquid, the rotor will rotate under the influence of gravity, causing the liquid to fall downwards and be discharged from the rotor. The first magnetic part of the closest second magnetic part on the rotor will rotate away, and the next first magnetic part will be attracted by the second magnetic part. The rotor, in this new angular state, will remain relatively stationary with respect to either the first frame or the second magnetic part, thus catching new dripping liquid. This design allows for more accurate and precise measurement of dripping flow by the flow sensing structure on the inner wall of the pipe.

[0068] According to a second embodiment of this utility model, a frozen soil heat pipe structure is provided:

[0069] A frozen soil heat pipe structure includes: a heat pipe A; and the aforementioned flow sensing structure disposed within the inner wall of the heat pipe A.

[0070] This application provides a technical solution for a frozen soil heat pipe structure. In this technical solution, a flow sensing structure is installed inside the frozen soil heat pipe to detect and monitor the fluid flow state inside the pipe.

[0071] According to a third embodiment of this utility model, a flow sensing device for the inner wall of a pipe is provided:

[0072] A flow sensing device for the inner wall of a pipe includes: the aforementioned flow sensing structure disposed inside the pipe body; and a magnetic field change monitoring sensor disposed outside the pipe body.

[0073] This application provides a technical solution for a flow sensing device on the inner wall of a pipe. In this technical solution, the flow rate on the inner wall of the pipe is monitored by setting an inner wall flow sensing structure inside the pipe and setting a magnetic field change monitoring sensor outside the pipe.

[0074] It should be noted that by conducting large-scale drip flow experiments on fluids in different phase transition states under different scenarios, the relationship between magnetic field strength, change period, change rate and fluid flow rate can be analyzed and summarized; thus, accurate monitoring of the flow rate on the inner wall of the pipe can be achieved.

[0075] Specifically, in this embodiment of the invention, the magnetic field change monitoring sensor is a Hall sensor.

[0076] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flow sensing structure for the inner wall of a pipe, characterized in that, The application relates to a pipe wall flow sensing structure. The pipe wall flow sensing structure comprises: a first frame (1) arranged in an outer pipe body, wherein a ventilation structure (101) is arranged on the first frame (1), and an outer wall of the first frame (1) is used for closely abutting an inner wall of the outer pipe body; a ring-shaped liquid collecting groove (2) arranged on an upper end of the first frame (1), wherein the ring-shaped liquid collecting groove (2) is used for receiving liquid condensed and flowing downward from the inner wall of the outer pipe body; a liquid guide part (3) arranged on the first frame (1), wherein one end of the liquid guide part (3) is communicated with the ring-shaped liquid collecting groove (2); a rotating wheel (4) arranged on a lower end of the first frame (1), wherein the rotating wheel (4) is located below the liquid guide part (3); a first magnetic part (501) arranged on the rotating wheel (4); 2. The tube inner wall flow sensing structure according to claim 1, wherein, wherein liquid drops at an outlet of the liquid guide part (3) fall on the rotating wheel (4) through the ventilation structure (101), and the rotating wheel (4) is used for rotating under the action of the liquid drops of the liquid guide part (3) to drive the first magnetic part (501) to rotate. The rotating wheel (4) comprises: a rotating wheel body (401) and a rotating shaft (402); the rotating wheel body (401) is arranged on the first frame (1) through the rotating shaft (402); the rotating wheel body (401) is provided with a liquid containing groove (403), wherein the liquid containing groove (403) is arranged in an annular array on the rotating wheel body (401), and the liquid containing groove (403) is used for receiving liquid drops of the liquid guide part (3); wherein the liquid containing groove (403) receives liquid drops on one side of the rotating shaft (402), and the liquid containing groove (403) discharges liquid drops when rotating to the other side of the rotating shaft (402).

3. The pipe wall flow sensing structure according to claim 2, wherein: the rotating wheel body (401) comprises: a rotating body (401a) in a cylindrical shape; a liquid containing structure (401b), wherein a plurality of liquid containing structures (401b) are arranged in an annular array on an outer circular wall of the rotating body (401a), the outer shape structure of the liquid containing structure (401b) is designed in an arc shape, the cross-sectional structure of the liquid containing structure (401b) is narrowed outward from one end close to the rotating body (401a), and the liquid containing structure (401b) and the rotating body (401a) are designed in an integral structure; a rotating body end cover (401c) mounted on two end faces of the rotating body (401a); and the rotating body end cover (401c) and the liquid containing structure (401b) constitute the liquid containing groove (403).

4. The pipe wall flow sensing structure according to claim 3, wherein: the first magnetic part (501) is arranged on the liquid containing structure (401b), and the first magnetic part (501) is located on a side of the liquid containing structure (401b) away from the rotating body (401a); or the first magnetic part (501) is arranged on the rotating body end cover (401c), and the first magnetic part (501) is located on a side of the rotating body end cover (401c) away from the rotating body (401a).

5. The pipe inner wall flow sensing structure according to claim 4, wherein, In the rotating state, the first magnetic part (501) generates a periodically changing magnetic field.

6. The pipe inner wall flow sensing structure according to claim 5, wherein, The number of the first magnetic part (501) is two or more, and the two or more first magnetic parts (501) are arranged in a ring array on the rotating wheel (4).

7. The tube inner wall flow sensing structure according to any one of claims 1 to 6, characterized in that, The number of the vent structure (101) is two or more; or The number of the vent structure (101) is one, and the first frame (1) is a cylindrical structure.

8. The pipe inner wall flow sensing structure according to any one of claims 1 to 6, wherein, A sealing ring structure (102) for filling the sealing gap is arranged on the outer wall of the first frame (1).

9. The pipe inner wall flow sensing structure according to claim 8, wherein, The number of the sealing ring structure (102) is two or more.

10. The pipe inner wall flow sensing structure according to any one of claims 1 to 6, wherein, A first ring body (103) is arranged on the upper end surface of the first frame (1), the outer diameter of the first ring body (103) is smaller than the inner diameter of the outer heat pipe inner wall, and the first ring body (103) and the upper end surface of the first frame (1) form the ring-shaped liquid collecting groove (2).

11. The pipe inner wall flow sensing structure according to claim 10, wherein, The liquid guide part (3) is a catheter structure, and the liquid guide part (3) is fixedly arranged on the first frame (1).

12. The tubular wall flow sensor structure of any one of claims 1 to 6, wherein, Comprising: A second magnetic part (502) arranged on the first frame (1), the second magnetic part (502) is located on one side of the first magnetic part (501), and the second magnetic part (502) is used for adsorbing the first magnetic part (501) to constrain the rotating state of the first magnetic part (501).

13. The pipe inner wall flow sensing structure according to claim 12, wherein, The second magnetic part (502) is located directly below or directly above the rotating path of the first magnetic part (501).

14. The pipe inner wall flow sensing structure according to claim 12, wherein, The adsorption force between the second magnetic part (502) and the first magnetic part (501) is less than the second moment of force generated by the full load liquid on the rotating wheel (4).

15. A frozen earth heat rod structure, characterized by, Comprising: A heat rod pipe (A); The pipe inner wall flow sensing structure according to any one of claims 1 to 14 arranged in the heat rod pipe (A).

16. A flow sensing device for the interior wall of a pipe, characterized by Comprising: The pipe inner wall flow sensing structure according to any one of claims 1 to 14 arranged inside the pipe body; A magnetic field change monitoring sensor arranged outside the pipe body.

17. The tubular wall flow sensor apparatus of claim 16, wherein, The magnetic field change monitoring sensor is a Hall sensor.

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