A geothermal extraction device

Abstract

The present invention relates to the field of geothermal energy technology, and its purpose is to provide a geothermal extraction device. This geothermal extraction device can extend the cold water heating time so that it can extract more geothermal energy, and the geothermal energy extraction efficiency is high. The above-mentioned geothermal extraction device includes: a mounting seat, a heat exchange component, a water pipe component and a plurality of heat conduction components; the heat exchange component is arranged in the mounting seat, which includes a plurality of spiral heat exchange tubes arranged in sequence from the inside to the outside, and two adjacent spiral heat exchange tubes are connected; the water pipe component includes an inlet pipe and an outlet pipe, the inlet pipe is connected to the outermost spiral heat exchange tube, and the outlet pipe is connected to the innermost spiral heat exchange tube; a plurality of heat conduction components are arranged on the mounting seat at intervals along the circumference of the mounting seat, and the heat conduction part of the heat conduction component is located on the outside of the mounting seat, and the heat exchange part is located on the inside of the mounting seat. The present invention solves the problem that the heating time of cold water in the device is short, the heat carried after heat exchange is relatively small, and the extraction efficiency of geothermal energy is low in the geothermal extraction device in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of geothermal energy technology, and in particular to a geothermal extraction device. Background Art

[0002] Geothermal extraction devices are devices that extract and utilize the heat stored in the earth's interior, collecting underground heat and converting it into usable heat or electricity. These devices work by using geothermal energy, such as heat from rock layers or groundwater, and utilizing the characteristics of geothermal energy. Geothermal extraction devices are of great significance in the field of renewable energy, contributing to sustainable energy supply, reducing dependence on traditional energy sources, and reducing the impact on the environment.

[0003] Existing geothermal extraction devices generally pump cold water into the device from the outside. During the circulation process, the cold water exchanges heat with the external geothermal energy through the pipe wall, thereby heating the cold water into hot water, and then the hot water is discharged from the device for storage or utilization, thereby realizing the extraction and utilization of geothermal energy. Since the water in the geothermal extraction device is continuously flowing, the heating time of the cold water in the device is short, the heat carried after the heat exchange is relatively small, and the extraction efficiency of geothermal energy is low. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the geothermal extraction device in the prior art, that is, the heating time of cold water in the device is short, the heat carried after heat exchange is relatively small, and the geothermal energy extraction efficiency is low, thereby providing a geothermal extraction device that can extend the heating time of cold water so that it can extract more thermal energy and has a higher geothermal energy extraction efficiency.

[0005] In order to solve the above problems, the present invention provides a geothermal extraction device, comprising:

[0006] Mounting seat;

[0007] A heat exchange component, the heat exchange component is arranged in the mounting seat, and comprises a plurality of spiral heat exchange tubes arranged in sequence from the inside to the outside, and two adjacent spiral heat exchange tubes are connected;

[0008] A water pipe assembly, the water pipe assembly comprising a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to the outermost one of the spiral heat exchange tubes, and the water outlet pipe is connected to the innermost one of the spiral heat exchange tubes;

[0009] A plurality of groups of heat-conducting components are arranged on the mounting seat at intervals along the circumference of the mounting seat, and the heat-conducting parts of the heat-conducting components are located outside the mounting seat, and the heat exchange parts are located inside the mounting seat.

[0010] Optionally, the heat exchange assembly includes a first spiral heat exchange tube, a second spiral heat exchange tube and a third spiral heat exchange tube arranged in sequence from the inside to the outside, the upper ends of the first spiral heat exchange tube and the second spiral heat exchange tube are connected through an upper connecting tube, the lower ends of the second spiral heat exchange tube and the third spiral heat exchange tube are connected through a lower connecting tube, the water inlet pipe is connected to the upper end of the third spiral heat exchange tube, and the water outlet pipe is connected to the lower end of the first spiral heat exchange tube.

[0011] Optionally, the heat conductive component includes: a first heat conductive member and a plurality of second heat conductive members, the first heat conductive member is arranged in the mounting seat and located outside the heat exchange component, the plurality of second heat conductive members are arranged at intervals along the height direction of the first heat conductive member, and one end of the second heat conductive member extends out of the outside of the mounting seat.

[0012] Optionally, a plurality of heat-conducting ring sheets are arranged on the second heat-conducting member.

[0013] Optionally, the mounting base includes: an upper cover, a cylinder and a lower cover, the upper cover is arranged at the top end of the cylinder, and the upper cover is provided with a first through hole for the water inlet pipe and the water outlet pipe to pass through, the side wall of the cylinder is provided with a second through hole for the second heat conductor to pass through, and the lower cover is arranged at the bottom end of the cylinder.

[0014] Optionally, it further includes an insertion rod assembly, which includes a central insertion rod arranged at the center position of the lower cover and edge insertion rods arranged around the central insertion rod.

[0015] Optionally, the ends of the central insertion rod and the edge insertion rod away from the mounting seat are pointed.

[0016] Optionally, the insertion rod assembly also includes: a driving member and a transmission mechanism, the driving member is arranged in the lower cover, the transmission mechanism includes a center transmission gear and an edge transmission gear, the center transmission gear is arranged on the center insertion rod and connected to the driving end of the driving member, and the edge transmission gear is arranged on the edge insertion rod and meshes with the center transmission gear.

[0017] Optionally, a heat insulating sleeve is also provided on the outside of the water outlet pipe.

[0018] Optionally, a pumping member is also provided on the water outlet pipe.

[0019] The present invention has the following advantages:

[0020] 1. The geothermal extraction device provided by the present invention comprises: a mounting seat, a heat exchange assembly, a water pipe assembly and a plurality of heat conduction assemblies. The heat exchange assembly is arranged in the mounting seat, and comprises a plurality of spiral heat exchange tubes arranged in sequence from the inside to the outside, and two adjacent spiral heat exchange tubes are connected. The water pipe assembly comprises an inlet pipe and an outlet pipe, the inlet pipe is connected to the outermost spiral heat exchange tube, and the outlet pipe is connected to the innermost spiral heat exchange tube. The plurality of heat conduction assemblies are arranged in the mounting seat at intervals along the circumference of the mounting seat, and the heat conduction part of the heat conduction assembly is located outside the mounting seat, and the heat exchange part is located inside the mounting seat. Cold water enters the outermost spiral heat exchange tube from the inlet pipe, and then circulates in a plurality of spiral heat exchange tubes in sequence, and finally is discharged from the innermost spiral heat exchange tube through the outlet pipe. When the cold water circulates in the spiral heat exchange tube, the heat conduction assembly can conduct the external geothermal energy to the heat exchange part through the heat conduction part, and heat exchange is performed with the cold water in the spiral heat exchange tube, and the cold water is heated, so as to realize the extraction and utilization of geothermal energy. Since the spiral heat exchange tube can extend the water flow path and multiple spiral heat exchange tubes are provided, the circulation time of cold water in the mounting base can be increased, thereby extending the heating time, heating to a higher temperature, extracting more thermal energy, and achieving higher efficiency in the extraction and utilization of geothermal energy.

[0021] 2. The geothermal extraction device provided by the present invention comprises a heat conducting component including: a first heat conducting component and a plurality of second heat conducting components, wherein the first heat conducting component is arranged in a mounting seat and located outside the heat exchange component, and the plurality of second heat conducting components are arranged at intervals along the height direction of the first heat conducting component, and one end of the second heat conducting component extends outside the mounting seat. Geothermal energy is extracted from the outside of the mounting seat by the plurality of second heat conducting components and transferred to the first heat conducting component, and the first heat conducting component can exchange heat with the spiral heat exchange tube to heat the cold water. The plurality of second heat conducting components can increase the heating area and extract more geothermal energy.

[0022] 3. In the geothermal extraction device provided by the present invention, a plurality of heat-conducting ring sheets are arranged on the second heat-conducting member. The arrangement of the heat-conducting ring sheets can further increase the heating area and improve the geothermal energy extraction efficiency.

[0023] 4. The geothermal extraction device provided by the present invention also includes a rod assembly, which includes a central rod arranged at the center of the lower cover and edge rods arranged around the central rod. The ends of the central rod and the edge rods away from the mounting seat are pointed. The central rod and the edge rods are provided to facilitate the insertion of the device into the soil for stable installation.

[0024] 5. The geothermal extraction device provided by the present invention, the rod assembly also includes: a driving member and a transmission mechanism, the driving member is arranged in the lower cover, the transmission mechanism includes a central transmission gear and an edge transmission gear, the central transmission gear is arranged on the central rod and connected to the driving end of the driving member, and the edge transmission gear is arranged on the edge rod and meshes with the central transmission gear. The driving member drives each transmission gear to rotate, thereby driving the central rod and the edge rod to rotate and drill into the soil, so as to realize quick and convenient installation of the device.

[0025] 6. The geothermal extraction device provided by the present invention is also provided with a heat insulating sleeve on the outside of the water outlet pipe to prevent heat loss of hot water during the circulation of the water outlet pipe and reduce the utilization rate of geothermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic diagram of a geothermal extraction device according to the present invention;

[0028] Figure 2 A schematic diagram of the geothermal extraction device of the present invention from another perspective;

[0029] Figure 3 It is a schematic diagram of the rod assembly in the geothermal extraction device of the present invention;

[0030] Figure 4 It is a schematic diagram of the connection between the heat conducting component and the mounting base in the geothermal extraction device of the present invention;

[0031] Figure 5 It is a schematic diagram of the connection of the heat conducting components in the geothermal extraction device of the present invention;

[0032] Figure 6 It is a schematic diagram of the connection of the heat exchange components in the geothermal extraction device of the present invention.

[0033] Description of reference numerals:

[0034] 1. Mounting seat, 11. Upper cover, 12. Cylinder, 13. Lower cover;

[0035] 2. heat exchange assembly, 21. first spiral heat exchange tube, 22. second spiral heat exchange tube, 23. third spiral heat exchange tube, 24. upper connecting tube, 25. lower connecting tube;

[0036] 31. water inlet pipe, 32. water outlet pipe, 33. thermal insulation sleeve, 34. water pumping part;

[0037] 4. heat-conducting component, 41. first heat-conducting member, 42. second heat-conducting member, 43. heat-conducting ring sheet;

[0038] 5. Rod assembly, 51. Center rod, 52. Edge rod, 53. Driving member, 54. Center transmission gear, 55. Edge transmission gear. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] like Figure 1 , Figure 2 As shown, it is a preferred embodiment of the geothermal extraction device of the present invention, which is mainly used to extract underground geothermal energy for subsequent use. Moreover, the geothermal extraction device can prolong the cold water heating time so that it can extract more geothermal energy and reach a higher heating temperature, and the geothermal energy extraction efficiency is higher.

[0044] The above-mentioned geothermal extraction device includes: a mounting seat 1, a heat exchange component 2, a water pipe component and a plurality of heat conduction components 4. The heat exchange component 2 is arranged in the mounting seat 1, and the heat exchange component 2 includes a plurality of spiral heat exchange tubes arranged in sequence from the inside to the outside, and two adjacent spiral heat exchange tubes are connected. The water pipe component includes an inlet pipe 31 and an outlet pipe 32, the inlet pipe 31 is connected to the outermost spiral heat exchange tube, and the outlet pipe 32 is connected to the innermost spiral heat exchange tube. The inlet pipe 31 supplies cold water from the outside into the heat exchange component 2. When the cold water circulates in the spiral heat exchange tube, it absorbs heat and is gradually heated, and then is discharged from the device through the outlet pipe 32. The plurality of heat conduction components 4 are arranged on the mounting seat 1 at intervals along the circumference of the mounting seat 1. The heat conduction part of the heat conduction component 4 is located on the outside of the mounting seat 1, and the heat exchange part is located on the inside of the mounting seat 1. The heat transfer part is used to extract geothermal energy from the surrounding environment, that is, the heat transfer part absorbs the heat in the geothermal energy, and then transfers it to the heat exchange part. The heat exchange part exchanges heat with the cold water in the spiral heat exchange tube to heat the cold water. The specific use process of the geothermal extraction device is as follows: cold water enters the outermost spiral heat exchange tube from the water inlet pipe 31, and then circulates in multiple spiral heat exchange tubes in sequence. While the cold water circulates in the spiral heat exchange tube, the heat transfer part absorbs the external geothermal energy and conducts it to the heat exchange part. The heat exchange part absorbs heat, and the higher temperature will exchange heat with the cold water in the spiral heat exchange tube to heat the cold water. The heated hot water is discharged from the innermost spiral heat exchange tube through the outlet pipe 32 to realize the extraction and utilization of geothermal energy. Compared with the existing straight tube, the spiral heat exchange tube can not only extend the water flow path, but also increase the heat exchange area, so that the cold water is given a longer heating time, can absorb more heat, and be heated to a higher temperature. In addition, multiple spiral heat exchange tubes are provided to further extend the water flow path, prolong the cold water heating time, and facilitate the absorption and extraction of more thermal energy. Therefore, the device has a higher geothermal energy extraction efficiency.

[0045] Furthermore, the mounting base 1 includes: an upper cover 11, a cylinder 12 and a lower cover 13. The cylinder 12 is cylindrical, and a heat exchange component 2 is arranged inside, and a second through hole is provided on the side wall of the cylinder 12. The upper cover 11 is arranged at the top of the cylinder 12, and the upper cover 11 is provided with a first through hole for the water inlet pipe 31 and the water outlet pipe 32 to pass through. The water inlet pipe 31 and the water outlet pipe 32 pass through the first through hole into the cylinder 12 and are connected to the heat exchange component 2. The lower cover 13 is arranged at the bottom end of the cylinder 12. In this embodiment, the connection method of the upper cover 11 and the lower cover 13 to the cylinder 12 is a detachable connection. Specifically, the upper cover 11 and the lower cover 13 are threadedly connected to the cylinder 12.

[0046] The water inlet pipe 31 in the water pipe assembly is used to deliver external cold water into the heat exchange assembly 2, and the water outlet pipe 32 is used to discharge the heated hot water from the heat exchange assembly 2. Among them, a pumping member 34 is also provided on the water outlet pipe 32. In this embodiment, the pumping member 34 is preferably a water pump, which is used to extract water flow to realize water circulation. In addition, a heat insulation sleeve 33 is also provided on the outer side of the water outlet pipe 32 for heat preservation. Since the heated hot water flows in the water outlet pipe 32, in order to prevent the hot water from causing heat loss when flowing in the water outlet pipe 32, a heat insulation sleeve 33 is provided on the outer wall of the water outlet pipe 32 for heat preservation, thereby reducing heat consumption and loss and ensuring heat extraction efficiency.

[0047] Further, such as Figure 6 As shown, in this embodiment, the heat exchange component 2 includes a first spiral heat exchange tube 21, a second spiral heat exchange tube 22 and a third spiral heat exchange tube 23 arranged in sequence from the inside to the outside. The first spiral heat exchange tube 21, the second spiral heat exchange tube 22 and the third spiral heat exchange tube 23 are similar in appearance, but the size gradually increases, which is equivalent to the second spiral heat exchange tube 22 surrounding the outside of the first spiral heat exchange tube 21, and the third spiral heat exchange tube 23 surrounding the outside of the second spiral heat exchange tube 22. The spiral heat exchange tube is made of a material with good thermal conductivity to facilitate heat exchange between the internal cold water and the heat conduction component 4. The upper ends of the first spiral heat exchange tube 21 and the second spiral heat exchange tube 22 are connected through an upper connecting tube 24, and the lower ends of the second spiral heat exchange tube 22 and the third spiral heat exchange tube 23 are connected through a lower connecting tube 25, ensuring that water can flow smoothly between the first spiral heat exchange tube 21, the second spiral heat exchange tube 22 and the third spiral heat exchange tube 23. The water inlet pipe 31 is connected to the upper end of the third spiral heat exchange tube 23, and the water outlet pipe 32 is connected to the lower end of the first spiral heat exchange tube 21. The flow path of water in the heat exchange assembly 2 is: the water enters from the upper end of the third spiral heat exchange tube 23, flows from top to bottom in the third spiral heat exchange tube 23, then enters the second spiral heat exchange tube 22 through the lower connecting pipe 25, flows from bottom to top in the second spiral heat exchange tube 22, then enters the first spiral heat exchange tube 21 through the upper connecting pipe 24, flows from top to bottom in the first spiral heat exchange tube 21, and then is discharged through the water outlet pipe 32. The heat exchange assembly 2 of this structure greatly prolongs the flow path of the water flow, thereby prolonging the heating time of the water flow, and can extract more geothermal energy.

[0048] In other embodiments, the number of the spiral heat exchange tubes may also be two, four, etc. The number of connection points between adjacent spiral heat exchange tubes may also be two or more.

[0049] Further, such as Figure 4 , Figure 5As shown, the heat-conducting component 4 includes: a first heat-conducting member 41 and a plurality of second heat-conducting members 42. The first heat-conducting member 41 and the second heat-conducting member 42 should also have good thermal conductivity. The axial direction of the first heat-conducting member 41 is parallel to the height direction of the mounting seat 1. The first heat-conducting member 41 is arranged in the mounting seat 1 and is located outside the heat exchange component 2, that is, the first heat-conducting member 41 is located between the side wall of the cylinder 12 and the third spiral heat exchange tube 23. The first heat-conducting member 41 is also a heat exchange part, which is used to exchange heat with the cold water in the heat exchange component 2. The plurality of second heat-conducting members 42 are arranged at intervals along the height direction of the first heat-conducting member 41, and the axial direction of the first heat-conducting member 41 is perpendicular to the axial direction of the second heat-conducting member 42. One end of the second heat-conducting member 42 extends out of the outside of the mounting seat 1 through the second through hole on the side wall of the cylinder 12. The second heat-conducting member 42 is also a heat-conducting part, which is used to extract and absorb geothermal energy and transfer it to the first heat-conducting member 41. Specifically, in this embodiment, seven second heat conducting members 42 are disposed on each first heat conducting member 41 , and the seven second heat conducting members 42 are evenly disposed on the first heat conducting member 41 .

[0050] In other embodiments, the number of the second heat conducting members 42 may also be two, four, ten, etc.

[0051] Furthermore, a plurality of heat-conducting ring sheets 43 are provided on the second heat-conducting member 42. The heat-conducting ring sheets 43 are annular thin sheets with good heat-conducting performance. The heat-receiving area can be increased by providing the heat-conducting ring sheets 43, thereby accelerating the efficiency of geothermal energy extraction.

[0052] In this embodiment, the number of the heat-conducting components 4 is four groups, which are evenly spaced around the mounting base 1 in the circumferential direction, and four first heat-conducting components 41 surround the outer circumference of the heat-exchange component 2 .

[0053] In other embodiments, the number of the heat-conducting components 4 may also be two groups, six groups, etc.

[0054] In other embodiments, the first heat conductor 41 may also be located on the inner side of the heat exchange component 2 , that is, the first heat conductor 41 may be disposed on the inner side of the innermost spiral heat exchange tube in the heat exchange component 2 .

[0055] Further, such as Figure 3 As shown, the geothermal extraction device further includes a rod assembly 5, which includes a central rod 51 disposed at the center of the lower cover 13 and edge rods 52 disposed around the central rod 51. By providing the central rod 51 and the edge rods 52, it is convenient to insert the device into the soil for installation and fixation. Specifically, in this embodiment, three edge rods 52 are disposed around the central rod 51.

[0056] In addition, the ends of the central insertion rod 51 and the edge insertion rod 52 away from the mounting seat 1 are pointed. The pointed ends can improve the soil breaking ability of the central insertion rod 51 and the edge insertion rod 52, making it easier to insert them into the soil.

[0057] In other embodiments, four or six edge rods 52 may be provided, or the center rod 51 may not be provided, and the device may be installed and fixed directly by the edge rods 52 .

[0058] The rod assembly 5 also includes: a driving member 53 and a transmission mechanism. The driving member 53 is arranged in the lower cover 13, and is preferably a motor. The transmission mechanism is arranged in the lower cover 13, and includes a central transmission gear 54 and an edge transmission gear 55. The central transmission gear 54 is arranged on the central rod 51 and is connected to the driving end of the driving member 53. The edge transmission gear 55 is arranged on the edge rod 52 and meshes with the central transmission gear 54. When the motor drives the central transmission gear 54 to rotate, it can synchronously drive each edge transmission gear 55 to transmit, and then the central rod 51 and the edge rod 52 will rotate, and quickly insert into the soil to achieve the fixation of the device.

[0059] In other embodiments, the rod assembly 5 may not be provided, and the mounting base 1 may be directly placed on the ground.

[0060] The following is a description of the use of the geothermal extraction device provided in this embodiment:

[0061] First, start the driving member 53 (motor) to drive the center plug 51 and the edge plug 52 to rotate, quickly insert them into the soil, and complete the fixation of the device. Then, cold water is supplied to the heat exchange assembly 2 through the water inlet pipe 31, and the water flow is driven to flow through the third spiral heat exchange tube 23, the second spiral heat exchange tube 22 and the first spiral heat exchange tube 21 through the pumping member 34. During the circulation process, the second heat-conducting member 42 and the heat-conducting ring sheet 43 arranged thereon absorb geothermal energy and conduct the geothermal energy to the first heat-conducting member 41. When there is a temperature difference between the high-temperature first heat-conducting member 41 outside the spiral heat exchange tube and the internal cold water, heat exchange will occur, and the cold water will be heated and heated. The heated hot water will be discharged from the water outlet pipe 32 carrying the geothermal energy.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A geothermal extraction device, characterized in that: include: Mounting seat (1); A heat exchange component (2), the heat exchange component (2) being arranged in the mounting seat (1), comprising a plurality of spiral heat exchange tubes arranged in sequence from the inside to the outside, and two adjacent spiral heat exchange tubes being connected; A water pipe assembly, the water pipe assembly comprising a water inlet pipe (31) and a water outlet pipe (32), the water inlet pipe (31) being connected to the outermost one of the spiral heat exchange tubes, and the water outlet pipe (32) being connected to the innermost one of the spiral heat exchange tubes; A plurality of groups of heat-conducting components (4), the plurality of groups of heat-conducting components (4) being arranged on the mounting seat (1) at intervals along the circumference of the mounting seat (1), and the heat-conducting parts of the heat-conducting components (4) being located outside the mounting seat (1) and the heat-exchanging parts being located inside the mounting seat (1); The heat-conducting component (4) comprises: a first heat-conducting member (41) and a plurality of second heat-conducting members (42); the first heat-conducting member (41) is arranged in the mounting seat (1) and is located outside the heat exchange component (2); the plurality of second heat-conducting members (42) are arranged at intervals along the height direction of the first heat-conducting member (41), and one end of the second heat-conducting member (42) extends outside the mounting seat (1); and the second heat-conducting member (42) is provided with a plurality of heat-conducting ring sheets (43).

2. The geothermal extraction device according to claim 1, characterized in that: The heat exchange assembly (2) comprises a first spiral heat exchange tube (21), a second spiral heat exchange tube (22) and a third spiral heat exchange tube (23) which are arranged in sequence from the inside to the outside; the upper ends of the first spiral heat exchange tube (21) and the second spiral heat exchange tube (22) are connected via an upper connecting tube (24); the lower ends of the second spiral heat exchange tube (22) and the third spiral heat exchange tube (23) are connected via a lower connecting tube (25); the water inlet pipe (31) is connected to the upper end of the third spiral heat exchange tube (23); and the water outlet pipe (32) is connected to the lower end of the first spiral heat exchange tube (21).

3. The geothermal extraction device according to claim 1, characterized in that: The mounting base (1) comprises an upper cover (11), a cylinder (12) and a lower cover (13); the upper cover (11) is arranged at the top end of the cylinder (12), and the upper cover (11) is provided with a first through hole for the water inlet pipe (31) and the water outlet pipe (32) to pass through; the side wall of the cylinder (12) is provided with a second through hole for the second heat conducting member (42) to pass through; and the lower cover (13) is arranged at the bottom end of the cylinder (12).

4. The geothermal extraction device according to claim 3, characterized in that: It also comprises an insertion rod assembly (5), wherein the insertion rod assembly (5) comprises a central insertion rod (51) arranged at the center of the lower cover (13) and edge insertion rods (52) arranged around the central insertion rod (51).

5. The geothermal extraction device according to claim 4, characterized in that: The ends of the central insertion rod (51) and the edge insertion rod (52) that are away from the mounting seat (1) are pointed.

6. The geothermal extraction device according to claim 4, characterized in that: The insertion rod assembly (5) further comprises: a driving member (53) and a transmission mechanism, wherein the driving member (53) is arranged in the lower cover (13), and the transmission mechanism comprises a central transmission gear (54) and an edge transmission gear (55), wherein the central transmission gear (54) is arranged on the central insertion rod (51) and is connected to the driving end of the driving member (53), and the edge transmission gear (55) is arranged on the edge insertion rod (52) and is meshed with the central transmission gear (54).

7. The geothermal extraction device according to any one of claims 1 to 6, characterized in that: The outer side of the water outlet pipe (32) is also provided with a heat insulation sleeve (33).

8. The geothermal extraction device according to any one of claims 1 to 6, characterized in that: The water outlet pipe (32) is also provided with a water pumping member (34).

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