High-ground-temperature tunnel terrestrial heat recovery and storage system

Abstract

The invention relates to the technical field of heat recovery, in particular to a high-ground-temperature tunnel terrestrial heat recovery and storage system which comprises a hot flow water storage tank, a cold flow water storage tank and a heat exchanger. The terrestrial heat recovery system further comprises a return pipe and a plurality of heat storage pipes which are arranged in the tunnel lining, and the heat storage pipes are arranged in the length direction of the tunnel and all communicate with the return pipe. A flow direction control mechanism is further arranged in the tunnel lining, the flow direction control mechanism communicates with the heat storage pipes and the cold flow water storage tank, the flow direction control mechanism is used for controlling the flow direction of liquid in the heat storage pipes, control is conducted through the flow direction control mechanism, and hot water in the heat storage pipe A is conveyed to the hot flow heat storage tank through the flow direction control mechanism; and then water flow with the temperature lower than the set temperature in the heat storage pipe B is conveyed into the heat storage pipe A, the heating speed of the heat storage pipe A on liquid in the heat storage pipe A is increased, finally, cold water in the cold flow water storage tank is conveyed into the heat storage pipe B through the backflow pipe, and therefore the maximum heat conversion efficiency can be achieved.

Description

Technical Field

[0001] The present application relates to the field of heat recovery technology, and in particular to a high geothermal tunnel geothermal heat recovery and storage system. Background Art

[0002] Tunnel geothermal technology uses heat from underground tunnels to recover and utilize energy. The basic principle of tunnel geothermal utilization is to absorb heat conducted from the tunnel walls through a heat exchanger within the tunnel and convert it into usable thermal energy.

[0003] In the prior art (publication number CN202210704703.7, patent application titled "A Heat Exchange and Heat Recovery System"), cooling water flowing from a water storage tank into a tunnel heat exchange assembly is diverted into multiple countercurrent heat exchange tubes and multiple downstream heat exchange tubes through the cooperation of an upper manifold and a lower manifold. The cooling water in the countercurrent and downstream heat exchange tubes flows in opposite directions, causing the cooling water entering the countercurrent and downstream heat exchange tubes to flow in different directions within the tunnel lining, absorbing heat before finally being collected and discharged into a manifold. Furthermore, the multiple countercurrent and downstream heat exchange tubes are arranged crosswise along the length of the tunnel lining. This arrangement of downstream and countercurrent heat exchange tubes allows the cooling water flowing in different directions to evenly exchange heat within the tunnel lining, resulting in a more uniform temperature within the tunnel lining. In the process of implementing this technical solution, at least the following problems were discovered in the prior art.

[0004] The above patent can only reduce the temperature of the tunnel caused by geothermal heat. However, the cold water in the downstream heat exchange pipes and countercurrent heat exchangers is in a flowing state and stays in the tunnel lining for a short time, which cannot ensure that the cold water rises to a certain temperature. Ultimately, the temperature of the discharged hot water cannot achieve the purpose of heat recovery. Even if the cold water in the downstream heat exchange pipes and countercurrent heat exchangers is discharged after reaching a predetermined temperature, the geothermal unevenness will occur due to the long distance of the tunnel. This will cause the overall temperature rise process of the cold water in the lining to be very slow, resulting in low heat recovery efficiency. Summary of the Invention

[0005] This application aims to address at least one of the technical issues in the prior art: uneven geothermal heat distribution over long tunnels, which results in a very slow overall heating of the cold water within the lining and low heat recovery efficiency. To this end, this application proposes a geothermal heat recovery and storage system for high-temperature tunnels.

[0006] According to an embodiment of the present application, a high-temperature tunnel geothermal heat recovery and storage system includes a hot flow water storage tank, a cold flow water storage tank, and a heat exchanger. The hot flow water storage tank is connected to the liquid inlet of the pipe-side channel of the heat exchanger, and the cold flow water storage tank is connected to the liquid outlet of the pipe-side channel of the heat exchanger. The geothermal heat recovery system also includes a return pipe and a heat storage pipe arranged in the tunnel lining. Multiple heat storage pipes are arranged along the length of the tunnel, and the heat storage pipes are all connected to the return pipe. A flow direction control mechanism is also provided in the tunnel lining. The flow direction control mechanism is connected to multiple heat storage pipes and cold flow water storage tanks. The flow direction control mechanism is used to control the flow direction of the liquid in the heat storage pipes.

[0007] According to some embodiments of the present application, the flow direction control mechanism includes a flow storage tube, the outer wall of the flow storage tube is connected to the liquid outlet of the heat storage tube, and the outer wall of the flow storage tube is also connected to the heat flow water storage tank. Two pushing plates are provided inside the flow storage tube, and two liquid flow pushing mechanisms are provided outside the flow storage tube. The two liquid flow pushing mechanisms respectively control the two pushing plates to move along the length direction of the flow storage tube.

[0008] According to some embodiments of the present application, a support frame is provided on the outside of the fluid storage tube, and the liquid flow control mechanism includes a rope, the two ends of the rope respectively pass through the two ends of the fluid storage tube and are connected to the first push plate thereof, and one end of the rope passes through the second push plate thereof and is connected thereto in a sliding and sealing manner; The liquid flow control mechanism also includes a driving wheel rotatably mounted on the support frame and a rotary driver for controlling the driving wheel. The rotation of the driving wheel drives the push plate to move along the length direction of the fluid storage tube through the rope. The end of the fluid storage tube is also provided with a guide wheel for controlling the direction of the rope.

[0009] According to some embodiments of the present application, the push plate includes a plate body, which is arranged inside the flow storage tube and coaxially therewith. A wear-resistant ring is provided on the outer edge surface of the plate body, and the wear-resistant ring is symmetrically arranged along its radial surface. A first sealing ring is also provided on the outer edge surface of the plate body, and the first sealing ring is located between the two wear-resistant rings.

[0010] According to some embodiments of the present application, a through hole is provided on the plate body for the rope to pass through, and the through hole is parallel to the axis direction of the plate body, and a second sealing ring is provided on the inner wall of the through hole.

[0011] According to some embodiments of the present application, the return pipe is arranged above the tunnel lining, and the heat storage pipe and the flow direction control mechanism are distributed on both sides of the return pipe.

[0012] According to some embodiments of the present application, a first one-way valve is provided at the connection between the heat storage tube and the return tube, a solenoid valve is provided at the connection between the heat storage tube and the flow storage tube, and a temperature sensor is provided on the heat storage tube for detecting its internal temperature.

[0013] According to some embodiments of the present application, the outer wall of the flow storage tube is wrapped with a heat-conducting sleeve, and the heat-conducting sleeve is provided with multiple groups of heat pipes corresponding to the heat storage tube, and the heat pipes are attached to the outer wall of the heat storage tube.

[0014] According to some embodiments of the present application, the heat pipe is wound around the outer wall of the heat storage tube.

[0015] According to some embodiments of the present application, a flow guide pipe is further included, one end of the flow guide pipe is provided with a second one-way valve and is connected to the flow storage pipe on one side of the return pipe, the other end of the flow guide pipe is provided with a three-way pipe, the first liquid inlet of the three-way pipe is connected to the flow guide pipe, the second liquid inlet of the three-way pipe is provided with a third one-way valve and is connected to the flow storage pipe on the other side of the return pipe, and the liquid outlet of the three-way pipe is connected to the hot flow water storage tank.

[0016] The beneficial effects of the present application are as follows: through control by the flow direction control mechanism, the flow direction control mechanism transports the hot water in the heat storage tube A to the hot flow heat storage tank, and then transports the water flow in the heat storage tube B that is less than the predetermined temperature to the interior of the heat storage tube A, thereby increasing the heating rate of the liquid inside the heat storage tube A, and finally transports the cold water in the cold flow water storage tank to the interior of the heat storage tube B through the return pipe, thereby achieving the maximum heat conversion efficiency.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-temperature tunnel geothermal heat recovery and storage system according to an embodiment of the present application. Figure 1 ; Figure 2 is a schematic structural diagram of a return pipe, a heat storage pipe, and a flow direction control mechanism according to an embodiment of the present application; Figure 3 yes Figure 2 A magnified view of point A; Figure 4 is a side view of a return pipe, a heat storage pipe, and a flow direction control mechanism according to an embodiment of the present application; Figure 5 yes Figure 4 BB direction cross-sectional view; Figure 6 2 is a schematic diagram of the three-dimensional structure of a push plate according to an embodiment of the present application; Figure 7This is a schematic diagram of the three-dimensional exploded structure of the return pipe, heat storage pipe and flow direction control mechanism according to an embodiment of the present application; Figure 8 This is a schematic diagram of the three-dimensional structure of a high-temperature tunnel geothermal heat recovery and storage system according to an embodiment of the present application. Figure 2 .

[0020] icon: 1-heat exchanger; 2-hot flow water storage tank; 3-cold flow water storage tank; 4-return pipe; 5-heat storage pipe; 51-first one-way valve; 52-solenoid valve; 53-temperature sensor; 6-flow control mechanism; 61-flow storage pipe; 611-support frame; 612-guide wheel; 62-push plate; 621-plate body; 622-wear-resistant ring; 623-first sealing ring; 624-second sealing ring; 63-liquid flow pushing mechanism; 631-rope; 632-drive wheel; 633-rotary drive; 7-thermal sleeve; 71-heat pipe; 8-flow guide pipe; 81-tee pipe; 82-second one-way valve; 83-third one-way valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0022] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0026] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0027] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] A high geothermal tunnel geothermal heat recovery and storage system according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0030] The first aspect of the present invention proposes a high-temperature tunnel geothermal heat recovery and storage system. Figure 1 As shown, it includes a hot flow water storage tank 2, a cold flow water storage tank 3 and a heat exchanger 1. The hot flow water storage tank 2 is connected to the liquid inlet of the tube-side channel of the heat exchanger 1, and the cold flow water storage tank 3 is connected to the liquid outlet of the tube-side channel of the heat exchanger 1. The geothermal heat recovery system also includes a return pipe 4 and a heat storage pipe 5 arranged in the tunnel lining. A plurality of heat storage pipes 5 are arranged along the length of the tunnel, and all of the heat storage pipes 5 are connected to the return pipe 4. A flow direction control mechanism 6 is also provided in the tunnel lining. The flow direction control mechanism 6 is connected to the multiple heat storage tubes 5 and the cold flow water storage tank 3 . The flow direction control mechanism 6 is used to control the flow direction of the liquid in the heat storage tubes 5 .

[0031] In this embodiment, the hot flow water storage tank 2 receives hot water from the liquid inlet of the tube-side channel of the heat exchanger 1 and then discharges it from its liquid outlet to the cold flow water storage pipe. The liquid inlet and liquid outlet of the shell-side channel of the heat exchanger 1 are connected to the external water network and are used to heat the fluid passing through the shell-side channel of the heat exchanger 1. The fluid is water in this example. The heated water can be used in a targeted manner according to its temperature, for example, as heating water or bathing water. The working principle of the geothermal heat recovery and storage system in a high-temperature tunnel is as follows: the cold flow water storage tank 3 transports cooling water to the interior of multiple thermal storage tubes 5 through the return pipe 4. The cooling water in the thermal storage tubes 5 absorbs a large amount of geothermal heat within the tunnel lining and completes the temperature increase. However, due to the long distance of the tunnel, the geothermal heat is uneven, which will cause the thermal storage tubes 5 distributed at different lengths of the tunnel to be heated unevenly. For example, the temperature of thermal storage tube 5 A can reach 90°C, but the temperature of thermal storage tube 5 B can only reach 50°C. To solve the above problem, the flow direction control mechanism 6 can be used to control the flow direction control mechanism 6. The flow direction control mechanism 6 transfers the hot water in the heat storage tube A 5 to the hot flow heat storage tank, and then transfers the water in the heat storage tube B 5 that is less than the set temperature to the inside of the heat storage tube A 5, thereby increasing the heating speed of the liquid inside the heat storage tube A 5. Finally, the cold water in the cold flow water storage tank 3 is transferred to the inside of the heat storage tube B 5 through the return pipe 4, thereby achieving the maximum heat conversion efficiency. As an implementation method, Figure 2 、 Figure 4 and Figure 5 As shown, further: The flow direction control mechanism 6 includes a flow storage tube 61, the outer wall of the flow storage tube 61 is connected to the liquid outlet of the heat storage tube 5, and the outer wall of the flow storage tube 61 is also connected to the heat flow water storage tank 2. Two pushing plates 62 are provided inside the flow storage tube 61, and two liquid flow pushing mechanisms 63 are provided outside the flow storage tube 61. The two liquid flow pushing mechanisms 63 respectively control the two pushing plates 62 to move along the length direction of the flow storage tube 61.

[0032] In this embodiment, after the liquid inside the heat storage tube 5 reaches a predetermined temperature, it is discharged into the interior of the flow storage tube 61. The liquid flow control mechanism controls the two push plates 62 to move from left to right along the length of the flow storage tube 61, pushing the liquid inside the flow storage tube 61 into the interior of the heat flow water storage tank 2. Due to the uneven geothermal conditions over a long tunnel, the heat storage pipes 5 distributed at different lengths of the tunnel may be heated unevenly. For example, the temperature of heat storage pipe A may reach 90°C, but the temperature of heat storage pipe B may only reach 50°C. The specific solution to the above problem is as follows. In order to fully explain the liquid flow control, the two push plates 62 are described as the first push plate 62 and the second push plate, respectively, and the heat storage tube C 5 is introduced here for reference; the A, B, and C heat storage tubes 5 are connected to the outer wall of the flow storage tube 61 in order from left to right. After the liquid in the heat storage tube C 5 has not reached the predetermined temperature and is discharged into the interior of the flow storage tube 61, and the heat storage tube A 5 needs to be replenished with liquid, the first push plate 62 at the far right end is controlled by the liquid flow pushing mechanism 63 to move from right to left along the length of the flow storage tube 61. The movement direction of the first push plate 62 is toward the connection point between the flow storage tube 61 and the heat storage tube A 5. The first push plate 62 squeezes the liquid so that it is injected into the interior of the heat storage tube A 5. When the liquid inside the C heat storage tube 5 does not reach the predetermined temperature and is discharged into the flow storage tube 61, and the B heat storage tube 5 needs to be replenished with liquid, the liquid port control mechanism controls its second push plate 62 to be located to the left of the connection point between the flow storage tube 61 and the B heat storage tube 5. At this time, when one push plate 62 is moving toward the connection point between the flow storage tube 61 and the B heat storage tube 5, the liquid inside the flow storage tube 61 will be injected into the B heat storage tube 5.

[0033] As an implementation method, Figure 3 As shown, further: A support frame 611 is provided on the outside of the reservoir tube 61. The flow control mechanism includes a rope 631. The two ends of the rope 631 pass through the two ends of the reservoir tube 61 and are connected to the first push plate 62. One end of the rope 631 passes through the second push plate 62 and is connected to the second push plate in a sliding and sealing manner. The liquid flow control mechanism also includes a driving wheel 632 rotatably mounted on the support frame 611 and a rotary driver 633 for controlling the driving wheel 632. The rotation of the driving wheel 632 drives the push plate 62 to move along the length of the fluid storage tube 61 via the rope 631. A guide wheel 612 is further provided at the end of the fluid storage tube 61 for controlling the direction of the rope 631 .

[0034] In this embodiment, the liquid flow control mechanism starts to work, and the rotary driver 633 controls the driving wheel 632 to rotate. The driving wheel 632 drives the pusher 631 to move along the length of the reservoir tube 61, thereby achieving the purpose of pushing the liquid in the reservoir tube 61 and controlling the flow direction. The driving wheel 632 and the guide wheel 612 are preferably sheaves, and the rope 631 is inserted into the groove of the sheave; The rotation driver 633 is preferably a servo motor, and the output shaft of the servo motor is in driving connection with the driving wheel 632 .

[0035] As an implementation method, Figure 6 As shown, further: The push plate 62 includes a plate body 621, which is arranged inside the flow storage tube 61 and coaxially therewith. A wear-resistant ring 622 is provided on the outer edge surface of the plate body 621, and the wear-resistant ring 622 is symmetrically arranged along its radial plane. A first sealing ring 623 is also provided on the outer edge surface of the plate body 621, and the first sealing ring 623 is located between the two wear-resistant rings 622.

[0036] In this embodiment, the plate body 621 is used to push the liquid inside the flow storage tube 61 and separate the space on both sides thereof; the wear-resistant ring 622 provides guidance and support for the plate body 621 and absorbs radial loads; at the same time, it can prevent the plate body 621 from contacting the metal of the inner wall of the flow storage tube 61. The first sealing ring 623 forms a dynamic seal to prevent the two sides of the plate body 621 from being connected.

[0037] As an implementation method, Figure 6 As shown, further: The plate body 621 is provided with a through hole for the rope 631 to pass through, and the through hole is parallel to the axis direction of the plate body 621 , and a second sealing ring 624 is provided on the inner wall of the through hole.

[0038] In this embodiment, the second sealing ring 624 and the rope 631 form a dynamic seal, which prevents the two sides of the plate 621 from being connected, allowing the liquid to flow along the through holes opened on the plate 621.

[0039] As an implementation method, Figure 1 As shown, further: The return pipe 4 is arranged above the tunnel lining, and the heat storage pipe 5 and the flow direction control mechanism 6 are distributed on both sides of the return pipe 4.

[0040] In this embodiment, the distributed arrangement of the heat storage tubes 5 can avoid the uneven geothermal conditions over a long distance in the tunnel to the greatest extent possible, so that locations with higher temperatures can be heated quickly, thereby accelerating the rate at which the liquid injected into the return pipe 4 is heated.

[0041] As an implementation method, Figure 2 and Figure 4 As shown, further: A first one-way valve 51 is provided at the connection between the heat storage tube 5 and the return tube 4 , a solenoid valve 52 is provided at the connection between the heat storage tube 5 and the flow storage tube 61 , and a temperature sensor 53 is provided on the heat storage tube 5 for detecting the internal temperature thereof.

[0042] In this embodiment, the first one-way valve 51 is used to prevent the liquid inside the heat storage tube 5 from flowing back into the return pipe 4. The temperature sensor 53 is electrically connected to the controller. When the temperature sensor 53 detects that the liquid inside the heat storage tube 5 reaches the temperature, it sends a signal to the controller. The controller can open the solenoid valve 52 corresponding to the liquid outlet of the heat storage tube 5, so that the liquid inside the heat storage tube 5 is discharged into the interior of the flow storage tube 61.

[0043] As an implementation method, Figure 7 As shown, further: The outer wall of the flow storage tube 61 is wrapped with a heat-conducting sleeve 7, and the heat-conducting sleeve 7 is provided with a plurality of heat pipes 71 corresponding to the heat storage tube 5, and the heat pipes 71 are attached to the outer wall of the heat storage tube 5; The heat pipe 71 is wound around the outer wall of the heat storage tube 5 .

[0044] In this embodiment, the thermal sleeve 7 is made of a material with high thermal conductivity, such as copper, but not limited thereto. The thermal sleeve 7 transmits the ground heat generated at the location of the flow storage tube 61 to the heat pipe 71, and finally the heat pipe 71 transfers the heat to the interior of the plurality of heat storage tubes 5 through heat transfer. The heat pipe 71 can increase the heat conduction area by winding around the heat storage tube 5.

[0045] As an implementation method, Figure 8 As shown, further: It also includes a guide pipe 8, one end of which is provided with a second one-way valve 82 and is connected to the flow storage pipe 61 on one side of the return pipe 4, and the other end of the guide pipe 8 is provided with a three-way pipe 81, a first liquid inlet of the three-way pipe 81 is connected to the guide pipe 8, a second liquid inlet of the three-way pipe 81 is provided with a third one-way valve 83, and is connected to the flow storage pipe 61 on the other side of the return pipe 4, and a liquid outlet of the three-way pipe 81 is connected to the hot flow water storage tank 2.

[0046] In this embodiment, the liquid inside the flow storage tubes 61 on both sides of the return tube 4 can be uniformly transported to the inside of the hot flow water storage tank 2 through the guidance of the guide tube 8. The functions of the second one-way valve 82 and the third one-way valve 83 are both to prevent the liquid in the guide tube 8 and the three-way tube 81 from flowing back to the inside of the corresponding flow storage tube 61.

[0047] The liquid inlets and liquid outlets of the hot flow water storage tank 2 and the cold flow water storage tank 3 are both provided with water pumps for inputting and outputting the liquid flow.

[0048] The above are merely examples of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may be subject to various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0049] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A high-temperature tunnel geothermal heat recovery and storage system, comprising a hot flow water storage tank (2), a cold flow water storage tank (3) and a heat exchanger (1), wherein the hot flow water storage tank (2) is connected to a liquid inlet of a pipe-side channel of the heat exchanger (1), and the cold flow water storage tank (3) is connected to a liquid outlet of a pipe-side channel of the heat exchanger (1); It is characterized by: It also includes a return pipe (4) and a heat storage pipe (5) arranged in the tunnel lining, wherein a plurality of heat storage pipes (5) are arranged along the length direction of the tunnel, and the heat storage pipes (5) are all connected to the return pipe (4); A flow direction control mechanism (6) is also provided in the tunnel lining. The flow direction control mechanism (6) is connected to the plurality of heat storage tubes (5) and the cold flow water storage tank (3). The flow direction control mechanism (6) is used to control the flow direction of the liquid in the heat storage tubes (5).

2. The high geothermal tunnel geothermal heat recovery and storage system according to claim 1, characterized in that: The flow direction control mechanism (6) includes a flow storage tube (61), the outer wall of the flow storage tube (61) is connected to the liquid outlet of the heat storage tube (5), and the outer wall of the flow storage tube (61) is also connected to the heat flow water storage tank (2). Two push plates (62) are provided inside the flow storage tube (61), and two liquid flow push mechanisms (63) are provided outside the flow storage tube (61). The two liquid flow push mechanisms (63) respectively control the two push plates (62) to move along the length direction of the flow storage tube (61).

3. The high geothermal tunnel geothermal heat recovery and storage system according to claim 2, characterized in that: A support frame (611) is provided outside the fluid storage tube (61), and the liquid flow control mechanism includes a rope (631). Two ends of the rope (631) respectively pass through the two ends of the fluid storage tube (61) and are connected to one push plate (62) thereof, and one end of the rope (631) passes through the second push plate (62) thereof and is connected thereto in a sliding and sealing manner. The liquid flow control mechanism further includes a driving wheel (632) rotatably mounted on the support frame (611) and a rotary driver (633) for controlling the driving wheel (632). The driving wheel (632) rotates to drive the push plate (62) to move along the length direction of the fluid storage tube (61) via the rope (631). The end of the fluid storage tube (61) is also provided with a guide wheel (612) for controlling the direction of the rope (631).

4. The high geothermal tunnel geothermal heat recovery and storage system according to claim 3, characterized in that: The push plate (62) includes a plate body (621), which is arranged inside the flow storage tube (61) and coaxially therewith. The outer edge surface of the plate body (621) is provided with a wear-resistant ring (622), and the wear-resistant ring (622) is symmetrically arranged along its radial surface. The outer edge surface of the plate body (621) is also provided with a first sealing ring (623), and the first sealing ring (623) is located between the two wear-resistant rings (622).

5. The high geothermal tunnel geothermal heat recovery and storage system according to claim 4, characterized in that: The plate body (621) is provided with a through hole for the rope (631) to pass through, and the through hole is parallel to the axial direction of the plate body (621), and a second sealing ring (624) is provided on the inner wall of the through hole.

6. A high geothermal tunnel geothermal heat recovery and storage system according to claim 1 or 2, characterized in that: The return pipe (4) is arranged above the tunnel lining, and the heat storage pipe (5) and the flow direction control mechanism (6) are distributed on both sides of the return pipe (4).

7. The high geothermal tunnel geothermal heat recovery and storage system according to claim 6, characterized in that: A first one-way valve (51) is provided at the connection point between the heat storage tube (5) and the return tube (4), a solenoid valve (52) is provided at the connection point between the heat storage tube (5) and the flow storage tube (61), and a temperature sensor (53) for detecting the internal temperature of the heat storage tube (5) is provided on the heat storage tube (5).

8. The high geothermal tunnel geothermal heat recovery and storage system according to claim 6, characterized in that: The outer wall of the flow storage tube (61) is wrapped with a heat-conducting sleeve (7), and a plurality of heat pipes (71) corresponding to the heat storage tube (5) are provided on the heat-conducting sleeve (7), and the heat pipes (71) are attached to the outer wall of the heat storage tube (5).

9. The high geothermal tunnel geothermal heat recovery and storage system according to claim 8, characterized in that: The heat pipe (71) is wound around the outer wall of the heat storage pipe (5).

10. The high geothermal tunnel geothermal heat recovery and storage system according to claim 6, characterized in that: The invention also includes a flow guide pipe (8), one end of which is provided with a second one-way valve (82) and is communicated with the flow storage pipe (61) on one side of the return pipe (4), and the other end of which is provided with a three-way pipe (81), a first liquid inlet of the three-way pipe (81) being communicated with the flow guide pipe (8), a second liquid inlet of the three-way pipe (81) being provided with a third one-way valve (83) and being communicated with the flow storage pipe (61) on the other side of the return pipe (4), and a liquid outlet of the three-way pipe (81) being communicated with the heat flow water storage tank (2).

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