A buried pipe structure of ground source heat pump

Abstract

The present invention relates to the field of geothermal heat pump technology, and discloses a geothermal heat pump underground pipe structure, including: a geothermal heat pump water distributor, a buried pipe valve is provided at the water outlet of the geothermal heat pump water distributor, and one end of the buried pipe valve away from the geothermal heat pump water distributor is provided with two mutually connected buried pipe bodies, and a plurality of buried pipe inner support assemblies are provided between the two buried pipe bodies, which are used to support and separate the two buried pipe bodies when backfilling soil into the underground hole. The present invention allows the inner support airbag to gradually expand from the bottom of the well to the wellhead position, and the two buried pipe bodies are spread apart to maintain the spacing. The expansion of the inner support airbag can stably support and separate the two buried pipe bodies, ensuring that the distance between them remains unchanged during long-term use, which helps to maintain the heat exchange efficiency between the buried pipe bodies. Maintaining the appropriate spacing between the buried pipe bodies helps to optimize the heat exchange conditions, so that heat is more efficiently transferred between the soil and the pipeline.

Description

Technical Field

[0001] The present invention relates to the field of ground source heat pumps, and more particularly to a ground source heat pump buried pipe structure. Background Art

[0002] A geothermal heat pump is a device that transfers low-grade thermal energy to high-grade thermal energy by inputting a small amount of high-grade energy into shallow land energy. It usually uses rock, groundwater or surface water as a low-temperature heat source. When the geothermal heat pump unit is in operation, it does not consume or pollute water, and does not require boilers, cooling towers or sites for stacking fuel waste. It has significant environmental benefits. According to the different forms of geothermal energy exchange systems, geothermal heat pump systems are divided into buried pipe geothermal heat pump systems, groundwater geothermal heat pump systems and surface water geothermal heat pump systems.

[0003] Place the pre-treated pipe into the wellbore, pay attention to keep the gap between the pipe and the hole wall uniform, avoid partial over-tightening or over-loosening, connect the pipe to the water collector or water distributor at the wellhead, ensure tight connection and no leakage, adopt the layered backfilling method, compact layer by layer, ensure the backfill is uniform and without gaps;

[0004] However, during the process of backfilling the soil with buried pipes, the two buried pipes may contact each other due to stress. Due to the direct contact or close spacing between the buried pipes, heat is directly transferred between the buried pipes instead of heat exchange through the soil, which in turn causes a "thermal short circuit" phenomenon. Heat cannot be effectively absorbed or released by the soil, thereby reducing the thermal efficiency of the system. For this reason, we propose a buried pipe structure for a ground source heat pump. Summary of the invention

[0005] The present invention provides a buried pipe structure for a ground source heat pump, which solves the technical problem in the related art that direct contact or close spacing between the buried pipes leads to direct transfer of heat between the buried pipes, thereby causing a "thermal short circuit" phenomenon, and the heat cannot be effectively absorbed or released by the soil, thereby reducing the thermal efficiency of the system.

[0006] The present invention provides a ground-source heat pump buried pipe structure, comprising: a ground-source heat pump water distributor, a buried pipe valve is arranged at the water outlet of the ground-source heat pump water distributor, one end of the buried pipe valve away from the ground-source heat pump water distributor is provided with two mutually connected buried pipe bodies, one end of the buried pipe body deep underground is provided with a center positioning member, which is used to adjust the position of the end of the buried pipe body deep underground at the bottom of the borehole, and a plurality of buried pipe inner support components are arranged between the two buried pipe bodies, which are used to support and separate the two buried pipe bodies when backfilling soil into the underground borehole;

[0007] The buried pipe internal support assembly includes an internal support airbag, an airbag inner core is arranged inside the internal support airbag, an inflatable column is arranged above the airbag inner core, and a blasting wall area is arranged on the upper wall of the internal support airbag. The inflatable column is used to pierce the blasting wall area after being covered by backfill soil to make the internal support airbag explode in the soil.

[0008] Furthermore, side support airbags that fit tightly with the outer walls of the two buried pipe bodies are fixedly provided on both sides of the inner support airbag, the two side support airbags are connected to the inner support airbag, and the two side support airbags are arc-shaped structures, a plurality of winding ropes are fixedly provided at one end of the side support airbag, a pull rope plate is fixedly provided at the other end of the plurality of winding ropes, and the winding ropes bypass the buried pipe body and are adhesively connected to the other end of the side support airbag through the pull rope plate.

[0009] Furthermore, the inner walls of the two side support airbags are fixedly provided with a plurality of detachable elastic bands, and one end of the plurality of detachable elastic bands away from the inner wall of the side support airbag is fixedly connected to the inner core of the airbag, so as to be used for pulling the two side support airbags away from the outer walls of the two buried pipe bodies after the inner support airbag explodes in the backfill soil.

[0010] Furthermore, a plurality of air outlet soft rubber tubes are provided at the air outlet end of the inner core of the airbag, and a plurality of tight-mouthed rubber films are fixedly provided inside the air outlet soft rubber tubes, and the diameter of the central holes of the plurality of tight-mouthed rubber films is smaller than the diameter of the air outlet end of the inner core of the airbag. At the same time, the plurality of tight-mouthed rubber films are elastic and are used to seal the opening of the pulled back air outlet soft rubber tubes.

[0011] Furthermore, the outer wall of the airbag inner core is provided with a plurality of air inlet holes, and a supporting air chamber opened in the wall panel of the airbag inner core is arranged inside the air inlet port of the air inlet hole. The airbag inner core is propped up by the expansion of the supporting air chamber and stands upright just below the blasting wall area on the inner supporting airbag.

[0012] Furthermore, the inflatable column includes several metal sheets glued to the outer wall of its top end, the several metal sheets are all fan-shaped structures, and the inflatable column is a conical structure. The inflatable column is interconnected with the supporting air chamber, the top of the inflatable column is lower than the blasting wall area and the two do not contact each other, and the thickness of the blasting wall area is smaller than the thickness of other areas on the inner support airbag.

[0013] Furthermore, the buried tube internal support assembly also includes an air supply pipe that passes through several internal support air bags in sequence, and the air supply pipe also passes through the inner core of the air bag in each internal support air bag. The outer wall of the air supply pipe is fixedly provided with several air supply heads that pass through the tight-mouthed rubber film and the air outlet soft rubber tube. The air supply heads of the air supply pipe correspond to the air outlet soft rubber tube one by one, and the air supply pipe is interconnected with the internal support air bag through the air outlet soft rubber tube.

[0014] Furthermore, a pulling cylinder head with a diameter larger than the diameter of the air outlet soft rubber tube is fixedly provided at one end of the air supply head away from the air supply pipe. The pulling cylinder head is reversely sleeved on the air outlet soft rubber tube and is used to pull back the air outlet soft rubber tube in the opposite direction when the air supply head is pulled out, so that it is tightened in the tight-mouthed rubber film to seal the inner support airbag.

[0015] Furthermore, the central positioning part includes a buried pipe protection head fixed on the U-shaped connecting head of the buried pipe body, the outer wall of the buried pipe protection head is provided with a contraction groove, an expansion ring is arranged in the contraction groove, and the expansion ring is in a folded shape, and the air inlet end of the expansion ring is provided with a ventilation pipe running through the buried pipe protection head, and the air inlet end of the ventilation pipe is provided with an air distribution chamber located inside the buried pipe protection head, and the air distribution chamber is interconnected with the expansion ring through the ventilation pipe.

[0016] Furthermore, one end of the air supply pipe away from the ground drilling hole is interconnected with the air distribution chamber. An inner air supply pipe is arranged inside the air distribution chamber to control the high-pressure gas to fill the air distribution chamber first, and then inflate the inner support airbag from bottom to top through the air supply head.

[0017] The beneficial effects of the present invention are:

[0018] The present invention makes the inner support airbag expand gradually from the bottom of the well to the wellhead, so as to expand and separate the two underground pipe bodies and keep the distance between them. The expansion of the inner support airbag can stably support and separate the two underground pipe bodies, ensuring that the distance between them remains unchanged during long-term use, which helps to maintain the heat exchange efficiency between the underground pipe bodies. Maintaining the appropriate distance between the underground pipe bodies helps to optimize the heat exchange conditions, so that the heat can be transferred between the soil and the pipe more efficiently.

[0019] After the inner support airbag expands to stably support and separate the two buried pipe bodies, the soil is backfilled into the well. When the backfill soil exceeds a certain thickness of the inner support airbag, the inner support airbag explodes in the soil. The rapid release of the gas in the inner support airbag will have a certain impact force on the surrounding soil. This impact force helps to compact the backfill soil and reduce the gaps in the soil, thereby increasing the compactness of the backfill soil. Backfill soil with higher compactness helps to improve the heat exchange efficiency between the buried pipe body and the soil. The compact soil can also better support the buried pipe body and reduce the risk of pipeline damage due to soil movement or settlement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the underground structure of the buried pipe of the present invention;

[0021] Figure 2 It is a schematic diagram of the expansion ring opening structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the inner support airbag of the present invention;

[0023] Figure 4The present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0024] Figure 5 It is a schematic diagram of the internal structure of the inner support airbag of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the airbag inner core of the present invention;

[0026] Figure 7 The present invention Figure 6 The enlarged schematic diagram of point B in the middle;

[0027] Figure 8 It is a schematic diagram of the internal cross-sectional structure of the airbag inner core of the present invention;

[0028] Fig. 9 The present invention Figure 8 Enlarged schematic diagram at point C in the middle.

[0029] In the figure: 11. Ground source heat pump water distributor; 12. Observation well support frame; 13. Buried pipe valve; 14. Buried pipe body; 2. Buried pipe inner support assembly; 21. Inner support air bag; 22. Air supply pipe; 23. Air supply inner pipe; 24. Earth pressure pull belt; 25. Side support air bag; 26. Air bag inner core; 27. Tube release elastic band; 28. Blasting wall area; 29. ​​Pull rope plate; 201. Winding rope; 202. Air outlet soft rubber tube; 203. Air inlet hole; 204. Inflatable column; 205. Air supply head; 206. Pull cylinder head; 207. Support air chamber; 208. Metal sheet; 209. Tightening rubber film; 3. Center positioning piece; 31. Buried pipe protection head; 32. Contraction groove; 33. Air distribution chamber; 34. Ventilation pipe; 35. Expansion ring. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0031] like Figure 1 - Fig. 9As shown, a ground source heat pump buried pipe structure comprises: a ground source heat pump water distributor 11, a buried pipe valve 13 is arranged at the water outlet of the ground source heat pump water distributor 11, observation well support frames 12 are arranged below both ends of the ground source heat pump water distributor 11, one end of the buried pipe valve 13 away from the ground source heat pump water distributor 11 is provided with two mutually connected buried pipe bodies 14, one end of the buried pipe body 14 deep into the ground is provided with a center positioning member 3, which is used to adjust the position of the end of the buried pipe body 14 deep into the ground at the bottom of the borehole, a plurality of buried pipe inner support assemblies 2 are arranged between the two buried pipe bodies 14, and the inflatable column 204 is used to support and separate the two buried pipe bodies 14 when backfilling the underground borehole;

[0032] Start the drilling equipment and drill according to the predetermined depth and diameter. During the drilling process, monitor the drilling progress and wellbore quality at any time to ensure that the wellbore verticality, roundness and aperture meet the requirements. Select a U-shaped buried pipe body 14 of suitable material and specification according to the design requirements, and place the pre-treated buried pipe body 14 into the wellbore. Pay attention to keeping the gap between the pipe and the hole wall uniform to avoid local over-tightening or over-loosening. If there is water in the hole, add corresponding weights to the lower part of the buried pipe body 14 according to the water level, and then insert the buried pipe body 14 into the hole under pressure maintenance. Connect the buried pipe body 14 to the ground source heat pump water distributor 11 at the wellhead to ensure that the connection is tight and leak-free using a suitable connection method.

[0033] The buried pipe inner support assembly 2 includes an inner support airbag 21, an airbag inner core 26 is arranged inside the inner support airbag 21, an inflatable column 204 is arranged above the airbag inner core 26, and an explosion wall area 28 is arranged on the upper wall of the inner support airbag 21, which is used to pierce the explosion wall area 28 after being covered by backfill soil to make the inner support airbag 21 explode in the soil;

[0034] After the underground pipe body 14 is fully inserted into the hole, the staff injects gas into the gas supply pipe 22 at the wellhead, so that the inner support airbag 21 gradually expands from the bottom of the well to the wellhead position, and the two underground pipe bodies 14 are expanded to maintain the distance. The expansion of the inner support airbag 21 can stably support and separate the two underground pipe bodies 14, ensuring that the distance between them remains unchanged during long-term use, which helps to maintain the heat exchange efficiency between the underground pipe bodies 14 and avoid performance degradation caused by changes in the pipe spacing. Maintaining the appropriate spacing between the underground pipe bodies 14 helps to optimize the heat exchange conditions and make the heat more efficiently transferred between the soil and the pipe.

[0035] After the inner support airbag 21 expands to stably support and separate the two buried pipe bodies 14, the soil is backfilled into the well. When the backfilled soil exceeds a certain thickness of the inner support airbag 21, the inflatable column 204 pierces the blasting wall area 28 under the squeezing of the soil on the inner support airbag 21, causing the inner support airbag 21 to explode in the soil. After piercing the inner support airbag 21, the rapid release of the gas in the inner support airbag 21 will produce a certain impact force on the surrounding soil. This impact force helps to compact the backfill soil and reduce the voids in the soil, thereby improving the compactness of the backfill soil. Backfill soil with higher compactness helps to improve the heat exchange efficiency between the buried pipe body 14 and the soil. The compact soil can also better support the buried pipe body 14 and reduce the risk of damage to the pipeline due to soil movement or settlement.

[0036] Side support airbags 25 that are closely attached to the outer walls of the two underground pipe bodies 14 are fixedly arranged on both sides of the inner support airbag 21. The two side support airbags 25 are connected to the inner support airbag 21, and the two side support airbags 25 are arc-shaped structures. A plurality of winding ropes 201 are fixedly arranged at one end of the side support airbag 25, and a pull rope plate 29 is fixedly arranged at the other end of the plurality of winding ropes 201. The winding ropes 201 bypass the underground pipe body 14 and are glued to the other end of the side support airbag 25 through the pull rope plate 29.

[0037] When the buried pipe body 14 is slowly sent into the wellhead, an inner support airbag 21 is installed every time a certain distance is sent, a plurality of winding ropes 201 are passed around the buried pipe body 14, and the pull rope plate 29 is glued to the other end of the side support airbag 25, so as to fix the entire inner support airbag 21.

[0038] The inner walls of the two side support airbags 25 are fixedly provided with a plurality of tube-detaching elastic bands 27, and one end of the plurality of tube-detaching elastic bands 27 away from the inner wall of the side support airbag 25 is fixedly connected to the airbag inner core 26, and is used to pull the two side support airbags 25 away from the outer walls of the two buried pipe bodies 14 after the inner support airbag 21 explodes in the backfill soil;

[0039] After the inner support airbag 21 is punctured, the slack side support airbag 25 is pulled toward the center through the resilience of several tube-detaching elastic bands 27, so that the pull rope plate 29 is separated from the adhesive surface of the side support airbag 25, and the slack inner support airbag 21 is completely contracted between the two buried pipe bodies 14 to reduce the contact area therewith, and the earth pressure pull belt 24 is fixed under the inner support airbag 21, and the earth pressure pull belt 24 is compressed by the soil to prevent displacement when the inner support airbag 21 is contracted.

[0040] The outlet end of the airbag inner core 26 is provided with a plurality of air outlet soft rubber tubes 202, and a plurality of tight-mouth rubber sheets 209 are fixedly provided inside the air outlet soft rubber tubes 202, and the diameter of the central holes of the plurality of tight-mouth rubber sheets 209 is smaller than the diameter of the outlet end of the airbag inner core 26, and the plurality of tight-mouth rubber sheets 209 are elastic and used to seal the pulled-back air outlet soft rubber tubes 202;

[0041] After all the inner support airbags 21 are inflated, as the air supply pipe 22 is pulled out, the air outlet soft rubber tube 202 is pulled back into the tight-mouthed rubber film 209 by the puller head 206, and the air outlet soft rubber tube 202 is tightly closed by a plurality of tight-mouthed rubber films 209 to prevent the inner support airbags 21 from deflation.

[0042] The outer wall of the airbag inner core 26 is provided with a plurality of air inlet holes 203, and the air inlet port of the air inlet hole 203 is provided with a supporting air chamber 207 opened in the wall plate of the airbag inner core 26. The airbag inner core 26 is supported by the expansion of the supporting air chamber 207 and stands upright just below the bursting wall area 28 on the inner supporting airbag 21;

[0043] The inner support airbag 21 is inflated through the air supply head 205 , and part of the air enters the support air chamber 207 through a plurality of air inlet holes 203 . As the support air chamber 207 and the inner support airbag 21 expand, the airbag inner core 26 stands directly below the blasting wall area 28 .

[0044] The inflatable column 204 includes a plurality of metal sheets 208 glued to the outer wall of the top end thereof. The plurality of metal sheets 208 are all fan-shaped structures, and the inflatable column 204 is a conical structure. The inflatable column 204 is interconnected with the supporting air chamber 207. The top end of the inflatable column 204 is lower than the blasting wall area 28 and the two do not contact each other. The thickness of the blasting wall area 28 is smaller than the thickness of other areas on the inner supporting airbag 21.

[0045] While the airbag inner core 26 is erected directly below the blasting wall area 28, the inflatable column 204 is also inflated and erected. When the backfill soil covers more than the inner support airbag 21, the sharp metal sheet 208 will contact the blasting wall area 28 under the pressure of the soil, thereby puncturing the blasting wall area 28. The rapid release of the gas in the inner support airbag 21 will produce a certain impact force on the surrounding soil, which helps to compact the backfill soil and reduce the voids in the soil.

[0046] The buried tube internal support assembly 2 also includes an air supply pipe 22 which passes through a plurality of internal support airbags 21 in sequence. The air supply pipe 22 also passes through the airbag inner core 26 in each internal support airbag 21. The outer wall of the air supply pipe 22 is fixedly provided with a plurality of air supply heads 205 which pass through the tight-mouthed rubber film 209 and the air outlet soft rubber tube 202. The air supply heads 205 of the air supply pipe 22 correspond one-to-one to the air outlet soft rubber tube 202, and the air supply pipe 22 is connected to the internal support airbag 21 through the air outlet soft rubber tube 202.

[0047] The end of the air supply head 205 away from the air supply pipe 22 is fixedly provided with a pull-up head 206 whose diameter is larger than the diameter of the air outlet soft rubber tube 202. The pull-up head 206 is reversely sleeved on the air outlet soft rubber tube 202, and is used to pull back the air outlet soft rubber tube 202 in the reverse direction when the air supply head 205 is withdrawn, and the air outlet soft rubber tube 202 is compressed in the tight-mouthed rubber film 209 to seal the inner support airbag 21. By injecting gas into the air supply pipe 22, the gas first fills the air chamber from the inner tube of the air supply inner tube 23 33, and then flows back to the air supply head 205 through the space between the air supply pipe 22 and the air supply inner tube 23, and enters the inner support airbag 21. When the air supply pipe 22 is pulled out, the air supply head 205 will be pulled out from the air outlet soft rubber tube 202, and the air outlet soft rubber tube 202 will be pulled back into the tight-mouthed rubber film 209 by the pulling tube head 206. The air outlet soft rubber tube 202 is tightly closed by a plurality of tight-mouthed rubber films 209 to prevent the inner support airbag 21 from deflating.

[0048] The central positioning member 3 includes a buried pipe protection head 31 fixed on the U-shaped connecting head of the buried pipe body 14. A contraction groove 32 is provided on the outer wall of the buried pipe protection head 31. An expansion ring 35 is arranged in the contraction groove 32, and the expansion ring 35 is folded. A ventilation pipe 34 running through the buried pipe protection head 31 is arranged at the air inlet end of the expansion ring 35. An air distribution chamber 33 located inside the buried pipe protection head 31 is arranged at the air inlet end of the ventilation pipe 34, and the air distribution chamber 33 is connected with the expansion ring 35 through the ventilation pipe 34.

[0049] One end of the air supply pipe 22 away from the ground drilling hole is connected to the air distribution chamber 33. The air distribution chamber 33 is provided with an air supply inner pipe 23 for controlling the high-pressure gas to first fill the air distribution chamber 33 and then inflate the inner support airbag 21 from bottom to top through the air supply head 205.

[0050] After the gas enters the gas distribution chamber 33, the expansion ring 35 expands at the bottom of the well as the gas increases. The expansion of the expansion ring 35 squeezes the surroundings, so that the buried pipe protection head 31 can be located at the center of the bottom of the well.

[0051] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A ground source heat pump buried pipe structure, include: A ground source heat pump water distributor (11), wherein a water outlet of the ground source heat pump water distributor (11) is provided with a buried pipe valve (13), and one end of the buried pipe valve (13) away from the ground source heat pump water distributor (11) is provided with two mutually connected buried pipe bodies (14), characterized in that one end of the buried pipe body (14) that penetrates underground is provided with a center positioning member (3) for adjusting the position of the other end of the buried pipe body (14) that penetrates underground at the bottom of a borehole, and a plurality of buried pipe inner support assemblies (2) are provided between the two buried pipe bodies (14) for supporting and separating the two buried pipe bodies (14) when backfilling soil into the underground borehole; The buried pipe inner support assembly (2) comprises an inner support airbag (21), an airbag inner core (26) is arranged inside the inner support airbag (21), an inflatable column (204) is arranged above the airbag inner core (26), and an upper wall of the inner support airbag (21) is provided with a blasting wall area (28), and the inflatable column (204) is used to puncture the blasting wall area (28) after being covered by backfill soil, so that the inner support airbag (21) explodes in the soil.

2. A ground source heat pump buried pipe structure according to claim 1, characterized in that: Side support airbags (25) that are tightly fitted to the outer walls of the two underground pipe bodies (14) are fixedly arranged on both sides of the inner support airbag (21); the two side support airbags (25) are in communication with the inner support airbag (21); and the two side support airbags (25) are arc-shaped structures; a plurality of winding ropes (201) are fixedly arranged at one end of the side support airbag (25); a pull rope plate (29) is fixedly arranged at the other end of the plurality of winding ropes (201); and the winding ropes (201) bypass the underground pipe body (14) and are adhesively connected to the other end of the side support airbag (25) through the pull rope plate (29).

3. A ground source heat pump buried pipe structure according to claim 2, characterized in that: The inner walls of the two side support airbags (25) are fixedly provided with a plurality of tube-detaching elastic bands (27); one end of the plurality of tube-detaching elastic bands (27) away from the inner wall of the side support airbag (25) is fixedly connected to the airbag inner core (26) and is used to pull the two side support airbags (25) away from the outer walls of the two buried pipe bodies (14) after the inner support airbag (21) explodes in the backfill soil.

4. The ground source heat pump buried pipe structure according to claim 1, characterized in that: The air outlet end of the airbag inner core (26) is provided with a plurality of air outlet soft rubber tubes (202), and a plurality of tight-mouth rubber sheets (209) are fixedly provided inside the air outlet soft rubber tube (202), and the diameter of the central hole of the plurality of tight-mouth rubber sheets (209) is smaller than the diameter of the air outlet end of the airbag inner core (26), and the plurality of tight-mouth rubber sheets (209) are elastic and are used to seal the air outlet soft rubber tube (202) that is pulled back.

5. The ground source heat pump buried pipe structure according to claim 1, characterized in that: The outer wall of the airbag inner core (26) is provided with a plurality of air inlet holes (203), and the air inlet port of the air inlet hole (203) is provided with a supporting air chamber (207) opened in the wall plate of the airbag inner core (26). The airbag inner core (26) is propped up by the expansion of the supporting air chamber (207) and stands upright just below the bursting wall area (28) on the inner supporting airbag (21).

6. The ground source heat pump buried pipe structure according to claim 5, characterized in that: The inflatable column (204) comprises a plurality of metal sheets (208) glued to the outer wall of the top end thereof, the plurality of metal sheets (208) are all fan-shaped structures, and the inflatable column (204) is a conical structure, the inflatable column (204) is interconnected with the supporting air chamber (207), the top end of the inflatable column (204) is lower than the blasting wall area (28) and the two are not in contact with each other, and the thickness of the blasting wall area (28) is smaller than the thickness of other areas on the inner supporting airbag (21).

7. The ground source heat pump buried pipe structure according to claim 4, characterized in that: The buried tube inner support assembly (2) further comprises an air supply pipe (22) which passes through the plurality of inner support air bags (21) in sequence, the air supply pipe (22) also passing through the air bag inner core (26) in each inner support air bag (21), the outer wall of the air supply pipe (22) is fixedly provided with a plurality of air supply heads (205) which pass through the tight-mouthed rubber film (209) and the air outlet soft rubber tube (202), the air supply heads (205) of the air supply pipe (22) correspond to the air outlet soft rubber tube (202) one by one, and the air supply pipe (22) is connected to the inner support air bag (21) through the air outlet soft rubber tube (202).

8. The ground source heat pump buried pipe structure according to claim 7, characterized in that: A cylinder puller head (206) having a diameter larger than that of the air outlet soft rubber tube (202) is fixedly provided at one end of the air supply head (205) away from the air supply pipe (22); the cylinder puller head (206) is reversely sleeved on the air outlet soft rubber tube (202) and is used to pull the air outlet soft rubber tube (202) back in the opposite direction when the air supply head (205) is withdrawn so as to shrink the air outlet soft rubber tube (202) in the tight-mouthed rubber film (209) to seal the inner support airbag (21).

9. The ground source heat pump buried pipe structure according to claim 7, characterized in that: The central positioning member (3) comprises a buried pipe protection head (31) fixed on a U-shaped connector of a buried pipe body (14); a contraction groove (32) is provided on an outer wall of the buried pipe protection head (31); an expansion ring (35) is provided in the contraction groove (32); and the expansion ring (35) is in a folded shape; a vent pipe (34) penetrating the buried pipe protection head (31) is provided at an air inlet end of the expansion ring (35); an air distribution chamber (33) located inside the buried pipe protection head (31) is provided at an air inlet end of the vent pipe (34); and the air distribution chamber (33) is communicated with the expansion ring (35) via the vent pipe (34).

10. The ground source heat pump buried pipe structure according to claim 9, characterized in that: The end of the air supply pipe (22) away from the ground drilling hole is communicated with the air distribution chamber (33), and the air distribution chamber (33) is provided with an air supply inner pipe (23) for controlling the high-pressure gas to first fill the air distribution chamber (33) and then inflate the inner support airbag (21) from bottom to top through the air supply head (205).

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