A ground circulation heating device with double hollow sucker rods

Abstract

This invention relates to the field of heating equipment technology. It provides a double-hollow sucker rod ground circulation heating device, including a heat exchange shell, a jacket, a burner mounting pipe, a chimney, a heat exchange coil, an auxiliary heating mechanism, and a dust blowing mechanism. The inner wall of the heat exchange shell has a jacket, and the outer wall of the jacket has a water inlet and a drain outlet. The burner mounting pipe is fixedly and connected to the heat exchange shell. A chimney is installed on the side wall of the heat exchange shell and is connected to the heat exchange shell. The heat exchange coil is fixedly installed inside the heat exchange shell, with both ends extending out of the heat exchange shell. The auxiliary heating mechanism is located inside the heat exchange shell for auxiliary heating of the heat exchange coil. The dust blowing mechanism is located inside the heat exchange shell. This technical solution addresses the problem of low heating efficiency in existing double-hollow sucker rod heating devices.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, specifically to a ground circulation heating device with double hollow sucker rods. Background Technology

[0002] In the field of oil extraction, the difficulty of extracting heavy oil, high-pour-point oil, and high-wax oil reservoirs is increasing year by year. Due to their high viscosity and high pour point, these crude oils are prone to problems such as poor fluidity, tubing wax buildup, and high lifting resistance during extraction. This not only leads to decreased pumping efficiency and reduced well production but also easily causes mechanical failures such as wax jamming, rod breakage, and rod detachment, increasing well maintenance costs and severely restricting the efficient development and utilization of these reservoirs. To solve these problems, the industry widely adopts heating and viscosity reduction technology, which lowers the viscosity of crude oil by increasing its temperature and improving fluidity. Among these technologies, the double hollow sucker rod circulating heating process has become one of the mainstream technologies in the field of heavy oil thermal recovery due to its advantages such as targeted heating and minimal contamination of the oil reservoir.

[0003] However, in existing double-hollow oil pumping equipment, the basic structure of its heating device is to connect the burner to the heating chamber, heat the water in the heating chamber through the burner, and then export the water from the heating chamber to achieve heat exchange. This heat exchange method is fast and direct, but the heat exchange efficiency is poor. A large amount of heat in the exhaust gas at the end of the burner is emitted as exhaust gas, causing air pollution and energy waste. Moreover, the heat exchange tube is set in the heat transfer liquid. During heat exchange, the heat needs to be conducted into the liquid first, and then the heat needs to be conducted to the outside through the heat exchange tube, which reduces the heat exchange efficiency. Summary of the Invention

[0004] To overcome the above-mentioned defects, the present invention provides a ground circulation heating device for double hollow sucker rods, which solves the technical problem of low heating efficiency of existing double hollow sucker rod devices.

[0005] According to one aspect, at least one embodiment of the present invention provides a double hollow sucker rod ground circulation heating device, including a heat exchange shell, a jacket, a burner mounting pipe, a chimney, a heat exchange coil, an auxiliary heating mechanism, and a dust blowing mechanism. The jacket is provided on the inner wall of the heat exchange shell, and a water inlet and a drain outlet are provided on the outer wall of the jacket. The burner mounting pipe is fixedly and connected to the heat exchange shell. The chimney is installed on the side wall of the heat exchange shell and is connected to the heat exchange shell. The heat exchange coil is fixedly installed inside the heat exchange shell, with both ends of the heat exchange coil extending out of the heat exchange shell. The auxiliary heating mechanism is provided inside the heat exchange shell for auxiliary heating of the heat exchange coil. The dust blowing mechanism is provided inside the heat exchange shell for dust blowing treatment of the heat exchange coil and the inner wall of the heat exchange shell. A lifting ring is fixedly provided on the top side wall of the heat exchange shell, and a support block is fixedly provided on the bottom side wall of the heat exchange shell.

[0006] Preferably, the auxiliary heating mechanism includes heater tubes and an air inlet pipe. A plurality of heater tubes are fixedly disposed inside the heat exchange housing. One end of each heater tube extends out of the heat exchange housing, and a mounting plate is fixedly disposed between the other ends of each heater tube. A connecting pipe is disposed between the plurality of heater tubes. The air inlet pipe passes through the side wall of the heat exchange housing and is connected to the heater tubes.

[0007] Furthermore, the dust blowing mechanism includes a moving block, a first gear, a first telescopic tube, a moving mechanism, and an angle adjustment mechanism. The moving block is slidably disposed on the inner top wall of the heat exchange shell. The side wall of the moving block has multiple dust blowing grooves. The first gear is rotatably disposed in the dust blowing grooves. A nozzle is installed on the side wall of the first gear. The first telescopic tube is disposed through the side wall of the heat exchange shell. One end of the first telescopic tube passes through the side wall of the moving block and communicates with the nozzle. The moving mechanism is disposed on the moving block and is used to drive the moving block to move within the heat exchange shell. The angle adjustment mechanism is disposed on the moving block and is used to adjust the position of the nozzle.

[0008] Furthermore, the moving mechanism includes a threaded rod, a guide rod, and a first motor. The threaded rod is rotatably disposed within the heat exchange housing and passes through the moving block via a threaded connection. The guide rod is fixedly disposed within the heat exchange housing, passes through the moving block, and is slidably connected to the moving block. The first motor is mounted on the heat exchange housing, and its output end is fixedly connected to the threaded rod.

[0009] Furthermore, the angle adjustment mechanism includes an arc-shaped rack, a second gear, and a first rotating mechanism. An arc-shaped first cavity is provided inside the moving block, and the arc-shaped rack is slidably disposed in the first cavity. The arc-shaped rack meshes with the first gear. The second gear is rotatably disposed in the first cavity and meshes with the arc-shaped rack. The first rotating mechanism is disposed on the moving block and is used to drive the second gear to rotate.

[0010] Based on the above scheme, the first rotating mechanism includes a drive port, a splined opening, a splined rod, and a reciprocating rotating mechanism. The drive port is located on the moving block, the splined opening is located on the second gear, the splined rod is rotatably disposed within the heat exchange housing, the splined rod passes through the drive port and the splined opening, the splined rod is slidably connected to the inner wall of the splined opening, and the reciprocating rotating mechanism is disposed between the heat exchange housing and the splined rod for driving the splined rod to reciprocate.

[0011] Based on the above scheme, the reciprocating rotation mechanism includes an adjusting housing, a third rack, and a hydraulic rod. The adjusting housing is fixedly installed inside the heat exchange housing. A third gear is rotatably installed inside the adjusting housing and is fixedly connected to the spline rod. The third rack is slidably installed inside the adjusting housing and meshes with the third gear. The hydraulic rod is installed on the adjusting housing, and the output end of the hydraulic rod is fixedly connected to the third rack. The guide rod, the threaded rod, and both ends of the spline rod are fitted with second telescopic tubes. The two ends of the second telescopic tubes are fixedly connected to the moving block and the inner wall of the heat exchange housing, respectively.

[0012] The beneficial effects of the embodiments of the present invention are as follows: 1. In this invention, by setting up the burner mounting pipe and the heat exchange coil, the flue gas from the burner can be introduced into the heat exchange shell, and crude oil can be introduced into the heat exchange coil. Thus, heat exchange between the flue gas and the crude oil can be achieved through the heat exchange coil, which facilitates the heating of the crude oil. The crude oil can be directly heated by the flue gas, which improves the heat exchange efficiency. At the same time, the excess heat in the flue gas can heat the water in the jacket, thereby improving the heat recovery efficiency. 2. In this invention, by setting up an auxiliary heating mechanism, high-temperature gas can be introduced into the heater tube through the air inlet pipe, thereby facilitating auxiliary heating of crude oil through the contact between the heater tube and the heat exchange coil, thereby improving heating efficiency; 3. In this invention, by setting up a dust blowing mechanism, after heat exchange is completed, dust can be blown at different positions on the heat exchange coil and the inner wall of the heat exchange shell by moving the nozzle and adjusting the angle. This facilitates the discharge of the dust adhering to the inner wall of the heat exchange shell and the surface of the heat exchange coil through the chimney, thereby improving the subsequent heating efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a ground circulation heating device with double hollow sucker rods according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the heat exchange shell in the embodiment; Figure 3 for Figure 1A schematic diagram of the heat exchange shell cross-section in the embodiment; Figure 4 for Figure 1 A schematic diagram of the auxiliary heating mechanism in the embodiment; Figure 5 for Figure 1 A schematic diagram of the heat exchange coil structure in the embodiment; Figure 6 for Figure 1 A cross-sectional structural schematic diagram of the dust blowing mechanism in the embodiment; Figure 7 for Figure 1 A cross-sectional structural schematic diagram of the reciprocating rotation mechanism in the embodiment; Figure 8 for Figure 1 A schematic diagram of the moving mechanism in the embodiment; Figure 9 for Figure 1 The embodiment is shown in the structural schematic diagram of the cross-section of the moving block.

[0015] In the diagram: 1. Heat exchanger shell; 2. Jacket; 3. Water inlet; 4. Drain outlet; 5. Burner mounting pipe; 6. Chimney; 7. Heat exchanger coil; 8. Heater tube; 9. Air inlet pipe; 10. Moving block; 11. First gear; 12. Nozzle; 13. First telescopic pipe; 14. Threaded rod; 15. Guide rod; 16. First motor; 17. Arc rack; 18. Second gear; 19. Drive port; 20. Splined port; 21. Splined rod; 22. Adjusting shell; 23. Third gear; 24. Third rack; 25. Hydraulic rod; 26. Lifting ring; 27. Support block. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0016] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0017] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 the present invention.

[0020] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] like Figures 1-9The diagram illustrates a double-hollow sucker rod ground circulation heating device according to an embodiment of the present invention. It includes a heat exchange shell 1, a jacket 2, a burner mounting pipe 5, a chimney 6, a heat exchange coil 7, an auxiliary heating mechanism, and a dust blowing mechanism. The jacket 2 is provided on the inner wall of the heat exchange shell 1, and a water inlet 3 and a drain outlet 4 are provided on the outer wall of the jacket 2. The burner mounting pipe 5 is fixedly and connected to the heat exchange shell 1. A chimney 6 is installed on the side wall of the heat exchange shell 1 and is connected to the heat exchange shell 1. The heat exchange coil 7 is fixedly installed inside the heat exchange shell 1, with both ends extending out of the heat exchange shell 1. The auxiliary heating mechanism is located inside the heat exchange shell 1 and is used for heat exchange... The coil 7 provides auxiliary heating. A dust blowing mechanism is installed inside the heat exchange shell 1 to blow dust from the heat exchange coil 7 and the inner wall of the heat exchange shell 1. A lifting ring 26 is fixedly installed on the top side wall of the heat exchange shell 1, and a support block 27 is fixedly installed on the bottom side wall of the heat exchange shell 1. The flue gas from the burner can be introduced into the heat exchange shell 1, and crude oil can be introduced into the heat exchange coil 7. Thus, heat exchange between the flue gas and crude oil can be achieved through the heat exchange coil 7, which facilitates the heating of crude oil. The crude oil can be directly heated by the flue gas, which improves the heat exchange efficiency. At the same time, the excess heat in the flue gas can heat the water in the jacket 2, thereby improving the heat recovery efficiency.

[0022] Reference Figures 1-5 The auxiliary heating mechanism includes heater tubes 8 and air inlet pipes 9. Multiple heater tubes 8 are fixedly installed inside the heat exchange shell 1. One end of each heater tube 8 extends out of the heat exchange shell 1, and a mounting plate is fixedly installed between the other ends of each heater tube 8. Connecting pipes connect the multiple heater tubes 8. The air inlet pipe 9 passes through the side wall of the heat exchange shell 1 and is connected to the heater tubes 8. Specifically, high-temperature gas can be introduced into the heater tubes 8 through the air inlet pipe 9, which facilitates auxiliary heating of crude oil through the contact between the heater tubes 8 and the heat exchange coil 7, thereby improving heating efficiency.

[0023] Reference Figures 6-9The dust blowing mechanism includes a movable block 10, a first gear 11, a first telescopic tube 13, a moving mechanism, and an angle adjustment mechanism. The movable block 10 is slidably mounted on the inner top wall of the heat exchange shell 1. Multiple dust blowing grooves are formed on the side wall of the movable block 10. The first gear 11 is rotatably mounted within the dust blowing grooves. A nozzle 12 is mounted on the side wall of the first gear 11. The first telescopic tube 13 passes through the side wall of the heat exchange shell 1, with one end passing through the side wall of the movable block 10 and communicating with the nozzle 12. The moving mechanism is mounted on the movable block 10 and is used to drive the movable block 10 to move within the heat exchange shell 1. The angle adjustment mechanism is mounted on the movable block 10 and is used to adjust the position of the nozzle 12. The moving mechanism includes a threaded rod 14, a guide rod 15, and a first motor. 16. The threaded rod 14 is rotatably disposed inside the heat exchange housing 1. The threaded rod 14 passes through the moving block 10 through a threaded engagement. The guide rod 15 is fixedly disposed inside the heat exchange housing 1. The guide rod 15 passes through the moving block 10 and is slidably connected to the moving block 10. The first motor 16 is mounted on the heat exchange housing 1. The output end of the first motor 16 is fixedly connected to the threaded rod 14. Specifically, after the heat exchange is completed, the moving block 10 and the nozzle 12 can be moved inside the heat exchange housing 1 by the operation of the moving mechanism. At the same time, the movement of the nozzle 12 can blow dust from different positions on the heat exchange coil 7 and the inner wall of the heat exchange housing 1, thereby facilitating the discharge of the dust adhering to the inner wall of the heat exchange housing 1 and the surface of the heat exchange coil 7 through the chimney 6, thereby improving the subsequent heating efficiency.

[0024] Reference Figures 6-9The angle adjustment mechanism includes an arc-shaped rack 17, a second gear 18, and a first rotating mechanism. An arc-shaped first cavity is formed within the moving block 10. The arc-shaped rack 17 is slidably disposed within the first cavity and meshes with the first gear 11. The second gear 18 is rotatably disposed within the first cavity and meshes with the arc-shaped rack 17. The first rotating mechanism is mounted on the moving block 10 and drives the second gear 18 to rotate. The first rotating mechanism includes a drive port 19, a splined port 20, a splined rod 21, and a reciprocating rotating mechanism. A drive port 19 is located on the movable block 10, and a splined port 20 is located on the second gear 18. A splined rod 21 is rotatably mounted inside the heat exchange housing 1, passing through the drive port 19 and the splined port 20. The splined rod 21 is slidably connected to the inner wall of the splined port 20. A reciprocating rotation mechanism is located between the heat exchange housing 1 and the splined rod 21 to drive the splined rod 21 to reciprocate. The reciprocating rotation mechanism includes an adjusting housing 22, a third rack 24, and a hydraulic rod 25. The adjusting housing 22 is fixedly mounted inside the heat exchange housing 1, and a rotatable mechanism is rotatably mounted inside the adjusting housing 22. The third gear 23 is fixedly connected to the splined rod 21. The third rack 24 is slidably disposed inside the adjusting housing 22 and meshes with the third gear 23. The hydraulic rod 25 is mounted on the adjusting housing 22, and its output end is fixedly connected to the third rack 24. The guide rod 15, the threaded rod 14, and both ends of the splined rod 21 are fitted with second telescopic tubes. The two ends of the second telescopic tubes are fixedly connected to the moving block 10 and the inner wall of the heat exchange housing 1, respectively. Specifically, the operation of the hydraulic rod 25 can be achieved by the third rack 24 in the adjusting housing. The nozzle 12 moves back and forth within the body 22. Simultaneously, the meshing of the third rack 24 with the third gear 23 drives the third gear 23 and the spline rod 21 to rotate. Furthermore, the sliding fit between the spline rod 21 and the inner wall of the spline opening 20 drives the second gear 18 to rotate. At the same time, the meshing of the second gear 18 with the arc-shaped rack 17 and the meshing of the arc-shaped rack 17 with the first gear 11 drives the first gear 11 to rotate back and forth and adjusts the angle of the nozzle 12, thereby facilitating dust blowing at different positions of the heat exchange shell 1 and the heat exchange coil 7.

[0025] In this embodiment, during use, the operator can introduce the flue gas from the burner into the heat exchange housing 1, and simultaneously introduce crude oil into the heat exchange coil 7. This allows for heat exchange between the flue gas and crude oil through the heat exchange coil 7, facilitating the heating of the crude oil. Direct heating of the crude oil via flue gas improves heat exchange efficiency. Excess heat in the flue gas can also heat the water in the jacket 2, improving heat recovery efficiency. Simultaneously, the operator can introduce high-temperature gas into the heater tube 8 through the air inlet pipe 9, facilitating auxiliary heating of the crude oil through contact between the heater tube 8 and the heat exchange coil 7, thereby improving heating efficiency. After heat exchange is complete, the operator controls the first motor 16 to operate. The operation of the first motor 16 drives the threaded rod 14 to rotate. Simultaneously, the threaded engagement between the threaded rod 14 and the moving block 10 moves the moving block 10 and the nozzle 12, supplying gas to the nozzle 12 through the first telescopic pipe 13. The movement of the nozzle 12 can blow dust from different locations on the inner wall of the heat exchange coil 7 and the heat exchange shell 1, facilitating the discharge of dust adhering to the inner wall of the heat exchange shell 1 and the surface of the heat exchange coil 7 through the chimney 6, thereby improving subsequent heating efficiency. Simultaneously, the operator controls the hydraulic rod 25, which moves the third rack 24 reciprocally within the adjusting housing 22. The meshing of the third rack 24 with the third gear 23 drives the third gear 23 and the spline rod 21 to rotate. Furthermore, the sliding engagement between the spline rod 21 and the inner wall of the spline opening 20 drives the second gear 18 to rotate. The meshing of the second gear 18 with the arc-shaped rack 17 and the arc-shaped rack 17 with the first gear 11 drives the first gear 11 to rotate reciprocally and adjust the angle of the nozzle 12, thus facilitating dust blowing from different locations on the heat exchange shell 1 and the heat exchange coil 7, thereby improving subsequent heat exchange efficiency.

[0026] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A ground circulation heating device with double hollow sucker rods, comprising a heat exchange shell (1), characterized in that, Also includes: The jacket (2) is provided on the inner wall of the heat exchange shell (1), and the outer wall of the jacket (2) is provided with a water inlet (3) and a drain outlet (4). Burner mounting pipe (5), which is fixed and connected to the heat exchange shell (1); Chimney (6), the chimney (6) is installed on the side wall of the heat exchange shell (1), and the chimney (6) is connected to the heat exchange shell (1); Heat exchange coil (7), the heat exchange coil (7) is fixedly installed inside the heat exchange shell (1), and both ends of the heat exchange coil (7) extend out of the heat exchange shell (1). An auxiliary heating mechanism is provided inside the heat exchange shell (1) for auxiliary heating of the heat exchange coil (7); A dust blowing mechanism is provided inside the heat exchange shell (1) for blowing dust from the heat exchange coil (7) and the inner wall of the heat exchange shell (1).

2. The ground circulation heating device with double hollow sucker rods according to claim 1, characterized in that, The auxiliary heating mechanism includes: Heater tube (8), a plurality of heater tubes (8) are fixedly arranged inside the heat exchange shell (1), one end of the heater tube (8) extends out of the heat exchange shell (1), an mounting plate is fixedly arranged between the other ends of the heater tubes (8), and a connecting pipe is arranged between the plurality of heater tubes (8); An air inlet pipe (9) is provided through the side wall of the heat exchange housing (1) and is connected to the heater tube (8).

3. A ground circulation heating device with double hollow sucker rods according to claim 2, characterized in that, The dust blowing mechanism includes: A movable block (10) is slidably disposed on the inner top wall of the heat exchange housing (1), and a plurality of dust blowing grooves are provided on the side wall of the movable block (10). The first gear (11) is rotatably disposed in the dust blowing groove, and a nozzle (12) is installed on the side wall of the first gear (11). The first telescopic tube (13) is disposed through the side wall of the heat exchange shell (1), and one end of the first telescopic tube (13) passes through the side wall of the moving block (10) and is connected to the nozzle (12). A moving mechanism is provided on the moving block (10) for driving the moving block (10) to move within the heat exchange housing (1); An angle adjustment mechanism is provided on the moving block (10) for adjusting the position of the nozzle (12).

4. A ground circulation heating device with double hollow sucker rods according to claim 3, characterized in that, The mobile mechanism includes: A threaded rod (14) is rotatably disposed inside the heat exchange housing (1), and the threaded rod (14) passes through the moving block (10) through a threaded engagement. Guide rod (15), the guide rod (15) is fixedly installed in the heat exchange shell (1), the guide rod (15) passes through the moving block (10) and is slidably connected to the moving block (10); The first motor (16) is mounted on the heat exchange housing (1), and the output end of the first motor (16) is fixedly connected to the threaded rod (14).

5. A ground circulation heating device with double hollow sucker rods according to claim 4, characterized in that, The angle adjustment mechanism includes: The arc-shaped rack (17) is provided in the moving block (10) with an arc-shaped first cavity. The arc-shaped rack (17) is slidably disposed in the first cavity and meshes with the first gear (11). The second gear (18) is rotatably disposed in the first cavity and meshes with the arc-shaped rack (17); A first rotating mechanism is disposed on the moving block (10) and is used to drive the second gear (18) to rotate.

6. A ground circulation heating device with double hollow sucker rods according to claim 5, characterized in that, The first rotating mechanism includes: A drive port (19) is provided on the movable block (10); Spline opening (20), the spline opening (20) is opened on the second gear (18); Spline rod (21), the spline rod (21) is rotatably disposed in the heat exchange housing (1), the spline rod (21) passes through the drive port (19) and the spline port (20), and the spline rod (21) is slidably connected to the inner wall of the spline port (20); A reciprocating rotation mechanism is provided between the heat exchange shell (1) and the spline rod (21) for driving the spline rod (21) to reciprocate.

7. A ground circulation heating device with double hollow sucker rods according to claim 6, characterized in that, The reciprocating rotation mechanism includes: An adjusting housing (22) is fixedly installed inside the heat exchange housing (1). A third gear (23) is rotatably installed inside the adjusting housing (22). The third gear (23) is fixedly connected to the spline rod (21). The third rack (24) is slidably disposed in the adjusting housing (22) and meshes with the third gear (23); A hydraulic rod (25) is mounted on the adjusting housing (22), and the output end of the hydraulic rod (25) is fixedly connected to the third rack (24).

8. A ground circulation heating device with double hollow sucker rods according to claim 7, characterized in that, The guide rod (15), the threaded rod (14) and the spline rod (21) are each fitted with a second telescopic tube, and the two ends of the second telescopic tube are respectively fixedly connected to the inner wall of the moving block (10) and the heat exchange shell (1).

9. A ground circulation heating device with double hollow sucker rods according to claim 8, characterized in that, The heat exchange shell (1) is fixedly provided with a lifting ring (26) on the top side wall.

10. A ground circulation heating device with double hollow sucker rods according to claim 9, characterized in that, The bottom side wall of the heat exchange shell (1) is fixedly provided with a support block (27).

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