A ground source heat pump ground loop down tube assembly

Abstract

The present application relates to the technical field of pipeline engineering, and particularly relates to a ground source heat pump buried pipe lowering assembly, which comprises a U-shaped pipe, further comprises a righting unit, the righting unit is provided with a plurality of righting units and is uniformly connected to the U-shaped pipe, the righting unit comprises two righting parts which are symmetrically distributed and detachably connected to the U-shaped pipe, at least two anti-floating parts are connected to the righting part, and a lifting part for changing the state of the anti-floating part and the righting part is connected to the anti-floating part. The righting unit can guide and protect the U-shaped pipe during the process of lowering the U-shaped pipe into the buried pipe hole, avoid the collision or friction between the U-shaped pipe and the wall of the buried pipe hole, and prevent damage, and the righting unit cooperates with the traction unit, so that the automatic centering function of the U-shaped pipe and the anti-floating function of the U-shaped pipe can be realized by only one drive, thereby reducing equipment investment and operation and maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of pipeline engineering technology, and in particular to a ground source heat pump buried pipe assembly. Background Technology

[0002] Ground source heat pump systems are widely used in building heating, cooling, and domestic hot water supply due to their core advantages of high efficiency, energy saving, environmental protection, and low carbon emissions. As the core carrier for heat exchange between the ground source heat pump system and the underground soil and rock, the quality of the buried pipes directly determines the system's heat exchange efficiency, operational stability, and service life.

[0003] When installing ground source heat pumps using vertical burial, the conventional process involves drilling in a designated area, lowering the buried pipe into the borehole, and then filling it with cement grout for fixation. However, the lowering and installation of buried pipes commonly suffers from the following problems: The entire construction process employs a multi-equipment, step-by-step operation mode, requiring specialized equipment with different functions to complete tasks such as pipe lowering, centering, and anti-buoyancy reinforcement. This results in poor coordination between equipment, cumbersome process connections, low construction efficiency, and increased costs. Furthermore, existing centralizers are typically designed with fixed dimensions and installed separately on two branch pipes of the buried pipe. This causes the two branch pipes to come into contact with each other during lowering. To prevent thermal short circuits, additional pipe clamps are needed to separate the two branch pipes. Gaps exist between the centralizer and the borehole wall, and the buried pipe may bend after being lowered to the required position, reducing the heat exchange efficiency of the buried pipe.

[0004] Therefore, there is an urgent need to provide a ground source heat pump buried pipe assembly with high equipment integration and precise positioning of buried pipes. Summary of the Invention

[0005] Therefore, it is necessary to provide a ground source heat pump buried pipe assembly to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a ground source heat pump buried pipe assembly, comprising: a U-shaped pipe, and further comprising a straightening unit, wherein multiple straightening units are provided and evenly connected to the U-shaped pipe, the straightening unit comprising two left-right symmetrically distributed and detachably connected to the U-shaped pipe, the straightening unit being connected to at least two anti-buoyancy parts, and the anti-buoyancy parts being connected to a lifting part for changing the state of the anti-buoyancy parts and the straightening parts.

[0007] The straightening part includes two symmetrically distributed semi-ring rods, and multiple circumferentially evenly distributed hinged connecting plates are hinged between the two semi-ring rods. In the initial state, the middle part of the hinged connecting plate is bent away from the U-shaped tube, and a buckle ring is detachably installed on the inner ring surface of the upper semi-ring rod.

[0008] The lifting part includes a lifting plate located at the upper end of the upper semi-ring rod, a traction rope installed between the lower end of the lifting plate and the anti-buoyancy part, and a baffle and a lifting part connected to the lower semi-ring rod on the lifting plate.

[0009] The ground source heat pump buried pipe assembly also includes a traction unit. Multiple traction units are provided and distributed circumferentially around the outer periphery of the U-shaped pipe. The traction unit is simultaneously slidably connected to multiple lifting plates in the same vertical direction. The traction unit lifts the multiple lifting plates sequentially from bottom to top.

[0010] In the initial state, the straightening unit protects the lowered U-shaped tube. After the U-shaped tube is lowered to the predetermined position, multiple traction units pull multiple lifting units. The lifting units not only control the straightening unit to change its state so that the U-shaped tube is automatically centered, but also drive the anti-buoyancy unit to insert and cooperate with the wall of the buried pipe hole.

[0011] Preferably, the ground source heat pump buried pipe assembly also includes a grouting unit for backfilling cement slurry into the buried pipe hole, the grouting unit being detachably installed on the U-shaped pipe and passing through multiple straightening units.

[0012] Preferably, the traction unit includes a steel wire rope that is slidably connected to multiple lifting plates in the same vertical direction, and a traction ball is installed at the lower end of the steel wire rope.

[0013] Preferably, the grouting unit includes a limiting frame that is detachably installed at the lower end of the U-shaped tube. A limiting sleeve is installed on the limiting frame, and multiple grouting pipes that are threadedly connected to each other are provided on the limiting sleeve. The grouting pipe located at the bottom is threadedly connected to the limiting sleeve.

[0014] Preferably, the anti-buoyancy part includes an anti-buoyancy component installed at the lower end of the upper semi-ring rod via a hinge frame, and a sliding opening is provided on the outer ring surface of the semi-ring rod above the anti-buoyancy component.

[0015] Preferably, the partition includes two guide rods that slide through the lifting plate. The two guide rods are installed on the upper end of the corresponding semi-ring rods. The lifting plate has a through hole for threading a steel wire rope. The lifting plate has an arc-shaped sliding hole between the through hole and the guide rod. A partition arc rod is slidably connected in the arc-shaped sliding hole. The two partition arc rods are used to block the traction ball.

[0016] Preferably, the lower end of the arc-shaped sliding hole is provided with a movable through hole, and a fixing block one located in the movable through hole is installed at the lower end of the blocking arc rod. A return spring is installed on the fixing block one, and a fixing block two is installed at the end of the return spring away from the fixing block one. The fixing block two is fixedly connected to the lower end of the lifting plate.

[0017] Preferably, the lifting component includes a guide block installed on the side wall of the lifting plate, a lifting rod slidably passing through the guide block, the lifting rod having a T-shaped structure, a connecting block installed at the lower end of the lifting rod, the connecting block being fixedly connected to the outer ring surface of the lower semi-ring rod, and a connecting spring being installed between the upper end of the lifting rod and the upper end of the guide block.

[0018] Preferably, the anti-buoyancy component is composed of a flow guide frame and a soil-breaking blade welded together.

[0019] Preferably, the upper end of the guide rod has a placement opening for blocking the retraction of the arc rod.

[0020] In summary, the present invention has the following beneficial technical effects: 1. The straightening unit used in the present invention can guide and protect the U-shaped tube during the process of lowering the U-shaped tube into the burial hole, avoiding damage caused by collision or friction between the U-shaped tube and the hole wall. Furthermore, the straightening unit, in conjunction with the traction unit, can achieve the automatic centering function of the U-shaped tube and improve the anti-buoyancy function of the U-shaped tube with only one drive, reducing equipment investment and maintenance costs. The pipe laying assembly can realize multiple functions of U-shaped tube burial on one device, effectively improving the applicability and construction efficiency of the pipe laying assembly.

[0021] 2. The initial bending of the hinged connecting plate of the straightening unit used in this invention can prevent the U-shaped tube from colliding and rubbing against the wall of the buried pipe hole during the lowering process, effectively preventing pipe damage. In addition, the initial bending size of the hinged connecting plate is smaller than the size of the buried pipe hole, which facilitates the lowering of the U-shaped tube. At the same time, the snap ring separates and limits the two branches of the U-shaped tube, avoiding thermal short circuits during use from the source, and ensuring stable heat exchange effect of the buried pipe.

[0022] 3. The synergistic effect of the traction unit and the lifting part adopted in this invention allows the U-shaped tube to be lowered to the predetermined position of the buried pipe hole. The traction unit pulls the lifting part upward to lift the semi-ring rod located below and pushes the hinged connecting plate. Multiple hinged connecting plates abut against the wall of the buried pipe hole, realizing the function of automatic centering of the U-shaped tube and ensuring installation accuracy. At the same time, the anti-buoyancy part is inserted and cooperates with the wall of the buried pipe hole during the lifting action, which significantly enhances the overall anti-buoyancy strength and anti-displacement ability of the pipeline after it is lowered, avoids the pipeline bending or displacement, and ensures long-term stability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown; Figure 2 A front view of the invention is shown; Figure 3 A cross-sectional view of the present invention is shown; Figure 4 A schematic diagram of the structure of the uprighting part, the anti-buoyancy part, and the lifting part of the present invention is shown; Figure 5 A schematic diagram of the structure of the uprighting part and the anti-buoyancy part of the present invention is shown; Figure 6 This invention includes a schematic diagram of the structure of a semi-ring rod, an anti-buoyancy section, a lifting section, and a traction unit. Figure 7 A schematic diagram of the structure of the U-shaped pipe and grouting unit of the present invention is shown; Figure 8 A schematic diagram of the operation of the wire rope driven anti-buoyancy component and hinged connecting plate of the present invention is shown.

[0025] The above-mentioned attached drawings include the following reference numerals: 1. U-shaped tube; 2. Straightening unit; 20. Straightening part; 200. Semi-ring rod; 201. Hinge connecting plate; 202. Snap ring; 21. Anti-buoyancy part; 210. Anti-buoyancy component; 211. Sliding opening; 22. Lifting part; 220. Lifting plate; 221. Traction rope; 222. Guide rod; 223. Through hole; 224. Partition arc rod; 225. Return spring; 226. Guide block; 227. Lifting rod; 228. Connecting block; 229. Connecting spring; 3. Traction unit; 30. Steel wire rope; 31. Traction ball; 4. Grouting unit; 40. Limiting frame; 41. Limiting sleeve; 42. Grouting pipe. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] See Figures 1-3 A ground source heat pump buried pipe assembly includes a U-shaped pipe 1, which is an existing buried pipe. The bend of the U-shaped pipe 1 is integrally formed with a tapered connecting structure, and the two channels at the upper end of the tapered connecting structure of the U-shaped pipe 1 form two branch pipes.

[0028] In practice, existing drilling machines are used to drill holes for the buried pipe at the planned locations, and then water is injected into the holes.

[0029] See Figure 1 , Figure 4 and Figure 7 The ground source heat pump buried pipe assembly also includes multiple straightening units 2 that are evenly connected to the U-shaped pipe 1. The grouting unit 4 passes through multiple straightening units 2. Each straightening unit 2 includes two left-right symmetrically distributed and detachably connected straightening parts 20 to the U-shaped pipe 1. At least two anti-buoyancy parts 21 are connected to the straightening parts 20. The anti-buoyancy parts 21 are connected to the lifting parts 22 for changing the state of the anti-buoyancy parts 21 and the straightening parts 20.

[0030] See Figure 1 , Figure 2 and Figure 6 The ground source heat pump buried pipe assembly also includes multiple traction units 3 arranged circumferentially around the outer periphery of the U-shaped pipe 1. The traction units 3 are connected to multiple corresponding lifting parts 22. After the U-shaped pipe 1 is lowered to the predetermined position of the buried pipe hole, the multiple traction units 3 pull the multiple lifting parts 22. The lifting parts 22 control the straightening part 20 to change its state, so that the U-shaped pipe 1 is automatically centered. The lifting parts 22 drive the anti-buoyancy part 21 to insert and cooperate with the wall of the buried pipe hole, thereby improving the overall anti-buoyancy strength and anti-displacement ability of the lowered U-shaped pipe 1 and ensuring the effect of the buried pipe.

[0031] See Figure 7 The ground source heat pump buried pipe assembly also includes a grouting unit 4 for backfilling cement slurry into the buried pipe hole. The grouting unit 4 is detachably installed on the U-shaped pipe 1. The grouting unit 4 includes a limiting frame 40 detachably installed at the lower end of the U-shaped pipe 1. A limiting sleeve 41 is installed on the limiting frame 40. Multiple grouting pipes 42 are provided on the limiting sleeve 41 and are threadedly connected to each other. The grouting pipe 42 located at the bottom is threadedly connected to the limiting sleeve 41.

[0032] In practice, the limiting frame 40 is installed on the tapered connecting structure of the U-shaped tube 1. The limiting frame 40 also fixes the limiting sleeve 41 on the U-shaped tube 1. The limiting sleeve 41 has threaded teeth inside and a through hole on its bottom wall. Then, a grouting pipe 42 is selected, and its lower end is covered with a sealing film that can be broken by air pressure. Then, it is threadedly connected to the limiting sleeve 41. The grouting pipe 42 is then connected to existing linear drive equipment (such as hydraulic push rod, electric slider, pneumatic push rod, etc.). Alternatively, the grouting pipe 42 can be connected to the lifting mechanism on the drilling machine. The lifting mechanism drives the grouting pipe 42 to move downward. The grouting pipe 42 drives the tapered connecting structure on the U-shaped tube 1 into the buried pipe hole. The tapered connecting structure drives the two branch pipes of the U-shaped tube 1 into the buried pipe hole. When the lifting mechanism drives the grouting pipe 42 into the buried pipe hole, the lifting mechanism stops working.

[0033] See Figure 4 , Figure 5 and Figure 7The straightening part 20 includes two symmetrically distributed semi-ring rods 200. Multiple circumferentially evenly distributed hinged connecting plates 201 are hinged between the two semi-ring rods 200. In the initial state, the middle part of the hinged connecting plate 201 is bent away from the U-shaped tube 1. A buckle ring 202 is detachably installed on the inner ring surface of the upper semi-ring rod 200.

[0034] In practice, the length of the grouting pipe 42 is matched with the spacing between two adjacent straightening units 2. After the first grouting pipe 42 enters the buried pipe hole, a straightening part 20 is selected, and the snap ring 202 is snapped onto a branch pipe of the U-shaped pipe 1. Then, the snap ring 202 is fixedly connected to the corresponding semi-ring rod 200 with bolts or existing snap fasteners to achieve the function of fixed connection between the branch pipe and the semi-ring rod 200. Subsequently, another straightening part 20 is selected, and the installation steps of the snap ring 202 are repeated to fix the other straightening part 20 to another branch pipe of the U-shaped pipe 1. Then, the two upper semi-ring rods 20 are... The two semi-circular rods 200 below and 0 are aligned and fixedly connected by bolts to realize the function of fixing the straightening unit 2 to the U-shaped tube 1. The two semi-circular rods 200 at the same height are spliced ​​into a complete ring with an outer diameter smaller than the buried pipe hole. The multiple hinged connecting plates 201 in the two straightening parts 20 are evenly distributed in the circumference, and the bending range in the initial state is smaller than the hole diameter of the buried pipe hole. The multiple bent hinged connecting plates 201 effectively avoid collision and friction between the U-shaped tube 1 and the hole wall of the buried pipe hole, avoid damage to the U-shaped tube 1, and do not affect the lowering of the U-shaped tube 1, thus realizing the function of the straightening part 20 protecting the U-shaped tube 1.

[0035] Two locking rings 202 separate and limit the two branch pipes on the U-shaped tube 1, effectively preventing thermal short circuits during use of the U-shaped tube 1 and ensuring the performance of the U-shaped tube 1.

[0036] See Figure 4 and Figure 5 The lifting part 22 includes a lifting plate 220 disposed at the upper end of the upper semi-ring rod 200. The lifting plate 220 is provided with a partition, which includes two guide rods 222 that slide through the lifting plate 220. The two guide rods 222 are installed at the upper end of the corresponding semi-ring rod 200, and the two guide rods 222 fix the lifting plate 220 to the semi-ring rod 200.

[0037] See Figure 1 , Figure 4 , Figure 5 and Figure 7The traction unit 3 is slidably connected to multiple lifting plates 220 in the same vertical direction. The traction unit 3 lifts the multiple lifting plates 220 sequentially from bottom to top. The traction unit 3 includes a steel wire rope 30 that is slidably connected to multiple lifting plates 220 in the same vertical direction. A traction ball 31 is installed at the lower end of the steel wire rope 30. The lifting plates 220 are provided with through holes 223 for threading the steel wire rope 30.

[0038] In actual operation, while the two straightening parts 20 are fixedly connected to the U-shaped tube 1, the semi-ring rod 200 limits the lifting plate 220 through the two guide rods 222. Then, multiple steel wire ropes 30 are passed through the through hole 223 from the lower end of the corresponding lifting plate 220. At this time, the traction ball 31 is located below the lifting plate 220.

[0039] Then, the next grouting pipe 42 is threaded onto the grouting pipe 42 that has entered the buried pipe hole. The lifting mechanism is then connected to the grouting pipe 42 that has not entered the buried pipe hole. The lifting mechanism is then started, and the lifting mechanism drives the grouting pipe 42 to continue moving into the buried pipe hole, thereby continuing to push the U-shaped pipe 1 into the buried pipe hole until the grouting pipe 42 enters the buried pipe hole. After that, the operation of the lifting mechanism is stopped.

[0040] The steps of fixing the two straightening parts 20 to the U-shaped pipe 1, passing the steel wire rope 30 through the lifting plate 220, splicing the grouting pipe 42, and the lifting mechanism driving the U-shaped pipe 1 into the buried pipe hole through the grouting pipe 42 are repeated until the lower end of the U-shaped pipe 1 enters the preset position of the buried pipe hole.

[0041] See Figure 1 and Figures 4-6 The lifting plate 220 has an arc-shaped sliding hole between the through hole 223 and the guide rod 222. A partition arc rod 224 is slidably connected in the arc-shaped sliding hole. The two partition arc rods 224 are used to block the traction ball 31. A movable through hole is opened at the lower end of the arc-shaped sliding hole. A fixing block 1 located in the movable through hole is installed at the lower end of the partition arc rod 224. A return spring 225 is installed on the fixing block 1. A fixing block 2 is installed at the end of the return spring 225 away from the fixing block 1. The fixing block 2 is fixedly connected to the lower end of the lifting plate 220. An opening for the partition arc rod 224 to retract is opened at the upper end of the guide rod 222.

[0042] In actual operation, the lifting plate 220 is initially located at the lower end of the guide rod 222. The ends of the two blocking arc rods 224 on the lifting plate 220 away from the two guide rods 222 are located in the through hole 223, which realizes the function of blocking the traction ball 31. The return spring 225 is in a stretched state. After the U-shaped tube 1 enters the preset position of the buried pipe hole, the upper ends of the multiple steel wire ropes 30 passing through multiple lifting plates 220 are connected to the existing winch. The U-shaped tube entering the buried pipe hole is then clamped by the existing clamping equipment. 1. Clamp and limit the U-shaped tube 1 to prevent it from moving out of the buried pipe hole. Start the winch. The winch drives the four wire ropes 30 to wind up. The wire ropes 30 drive the traction ball 31 to rise. The traction ball 31 moves upward from the bottom of the buried pipe hole. The traction ball 31 lifts the multiple lifting plates 220 from bottom to top in sequence. The traction ball 31 moves into the through hole 223 of the corresponding lifting plate 220 and pushes the two partition arc rods 224. The two partition arc rods 224 drive the lifting plate 220 to slide upward on the two guide rods 222.

[0043] See Figure 1 and Figures 4-6 The lifting plate 220 is also provided with a lifting member connected to the lower semi-ring rod 200. The lifting member includes a guide block 226 installed on the side wall of the lifting plate 220. A lifting rod 227 is slidably passed through the guide block 226. The lifting rod 227 has a T-shaped structure. A connecting block 228 is installed at the lower end of the lifting rod 227. The connecting block 228 is fixedly connected to the outer ring surface of the lower semi-ring rod 200. A connecting spring 229 is installed between the upper end of the lifting rod 227 and the upper end of the guide block 226.

[0044] In specific operation, when multiple lifting plates 220 in the same straightening unit 2 move upward, the multiple lifting plates 220 drive multiple connecting springs 229 to move upward through multiple guide blocks 226. The elastic force provided by the connecting springs 229 is greater than the weight of the lower semi-ring rods 200. The multiple upward-moving connecting springs 229 drive the two lower semi-ring rods 200 to move upward through multiple lifting rods 227 and corresponding connecting blocks 228. The two lower semi-ring rods 200 simultaneously push multiple hinged connecting plates 201, causing them to continue to bend away from the U-shaped tube 1. The multiple bent hinged connecting plates 201 simultaneously contact the wall of the buried pipe hole and correct the position of the U-shaped tube 1 (e.g., Figure 8 As shown in the figure, the U-shaped tube 1 is automatically centered in the center of the buried pipe hole. The water in the buried pipe hole provides buoyancy to the U-shaped tube 1, and the position of the U-shaped tube 1 can be changed without using a large force.

[0045] See Figure 1 and Figures 4-6A traction rope 221 is installed between the lower end of the lifting plate 220 and the anti-buoyancy part 21. The anti-buoyancy part 21 includes an anti-buoyancy component 210 installed at the lower end of the upper semi-ring rod 200 via a hinge frame. The anti-buoyancy component 210 is composed of a flow guide frame and a soil-breaking blade welded together. The flow guide frame is fixedly connected to the traction rope 221. The flow guide frame has a triangular prism structure, and multiple circular holes for fluid flow are opened on both side walls. A sliding opening 211 is opened on the outer ring surface of the semi-ring rod 200 above the anti-buoyancy component 210.

[0046] In practice, while the U-shaped pipe 1 is automatically centered, multiple lifting plates 220 drive multiple anti-buoyancy components 210 to rotate along the corresponding hinged frame away from the U-shaped pipe 1 via multiple traction ropes 221. That is, the guide frame and the soil-breaking blade rotate, and the soil-breaking blades on the multiple anti-buoyancy components 210 break through the wall of the buried pipe hole and gradually insert into the soil (e.g., Figure 8 As shown in the figure, it effectively improves the connection strength between the straightening part 20 and the buried pipe hole, provides effective anti-buoyancy and anti-displacement capabilities for the U-shaped pipe 1, avoids the bending phenomenon of the U-shaped pipe 1 entering the buried pipe hole, and ensures the heat exchange effect of the buried pipe. At the same time, multiple guide frames are in a horizontal state with their openings facing upwards. The lower end of the guide frame has a conical structure, which does not affect the discharge of water in the buried pipe hole and the rise of cement slurry during grouting. Cement slurry can also enter the guide frame through multiple circular holes, effectively increasing the connection strength between the anti-buoyancy part 210 and the cement slurry.

[0047] The lifting plate 220 continues to move upward to the placement opening of the guide rod 222. The tensioned return spring 225 returns to its original position and drives the partition arc rod 224 to slide in the arc-shaped sliding hole through the fixing block. The end of the partition arc rod 224 near the guide rod 222 moves into the placement opening, and the end of the partition arc rod 224 away from the guide rod 222 moves into the arc-shaped sliding hole, thereby releasing the limit on the traction ball 31, making it easier for the traction ball 31 to pass through the through hole 223 and separate from the lifting plate 220. The placement opening limits the partition arc rod 224 to prevent the lifting plate 220 from resetting downward, thereby preventing the U-shaped tube 1 from moving again after centering. If the lifting plate 220 has not moved to the placement opening after the U-shaped tube 1 is automatically centered, the lifting plate 220 can squeeze the connecting spring 229 to ensure that the lifting plate 220 can move to the placement opening.

[0048] The winch continuously winds up multiple wire ropes 30, which in turn push multiple lifting plates 220 above via traction balls 31, achieving the function of automatically centering the U-shaped tube 1 from bottom to top. This also improves the anti-buoyancy capacity of the U-shaped tube 1 in sections, thereby improving the overall anti-buoyancy strength of the U-shaped tube 1. This effectively reduces the use of equipment, lowers construction costs, and improves the applicability and construction efficiency of the lowering assembly, until the multiple wire ropes 30 drive the corresponding traction balls 31 to separate from all the lifting plates 220, and the lowering of the U-shaped tube 1 is completed.

[0049] Connect the output pipe of the existing grouting machine to the uppermost grouting pipe 42. The grouting machine injects cement slurry into the grouting pipe 42 and discharges it from the lower end of the lowermost grouting pipe 42 into the buried pipe hole. The cement slurry gradually fills the buried pipe hole from the lower end and squeezes the water out of the buried pipe hole until the cement slurry overflows from the upper end of the buried pipe hole. Then stop the cement slurry injection and wait for the cement slurry to solidify. The underground pipe laying operation is then completed.

[0050] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The embodiments described in this specific embodiment are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A ground source heat pump buried pipe assembly, comprising a U-shaped pipe, characterized in that, Also includes: The straightening unit is provided in multiple and evenly connected to the U-shaped tube. The straightening unit includes two straightening parts that are symmetrically distributed on the left and right and detachably connected to the U-shaped tube. At least two anti-buoyancy parts are connected to the straightening parts, and lifting parts are connected to the anti-buoyancy parts. The straightening part includes two symmetrically distributed semi-ring rods, with multiple hinged connecting plates hinged between the two semi-ring rods. In the initial state, the middle part of the hinged connecting plate is bent away from the U-shaped tube, and a buckle ring is detachably installed on the inner ring surface of the upper semi-ring rod. The lifting part includes a lifting plate located at the upper end of the upper semi-ring rod, a traction rope installed between the lower end of the lifting plate and the anti-buoyancy part, and a baffle and a lifting part connected to the lower semi-ring rod on the lifting plate. The traction unit is provided in multiple ways. The traction unit is simultaneously slidably connected to multiple lifting plates in the same vertical direction. The traction unit lifts the multiple lifting plates sequentially from bottom to top. In the initial state, the straightening unit protects the lowered U-shaped tube. After the U-shaped tube is lowered to the predetermined position, multiple traction units pull multiple lifting units. The lifting units not only control the straightening unit to change its state so that the U-shaped tube is automatically centered, but also drive the anti-buoyancy unit to insert and cooperate with the wall of the buried pipe hole.

2. The ground source heat pump buried pipe assembly according to claim 1, characterized in that: It also includes a grouting unit for backfilling cement slurry into the buried pipe hole, the grouting unit being detachably installed on the U-shaped pipe and passing through multiple straightening units.

3. The ground source heat pump buried pipe assembly according to claim 1, characterized in that: The traction unit includes steel wire ropes that are simultaneously slidably connected to multiple lifting plates in the same vertical direction, and traction balls are installed at the lower ends of the steel wire ropes.

4. The ground source heat pump buried pipe assembly according to claim 2, characterized in that: The grouting unit includes a detachable limiting frame installed at the lower end of the U-shaped tube. A limiting sleeve is installed on the limiting frame, and multiple grouting pipes are threadedly connected to each other on the limiting sleeve. The grouting pipe at the bottom is threadedly connected to the limiting sleeve.

5. The ground source heat pump buried pipe assembly according to claim 1, characterized in that: The anti-buoyancy part includes an anti-buoyancy component installed at the lower end of the upper semi-ring rod via a hinge frame, and a sliding opening is provided on the outer ring surface of the semi-ring rod above the anti-buoyancy component.

6. The ground source heat pump buried pipe assembly according to claim 3, characterized in that: The partition includes two guide rods that slide through the lifting plate. The two guide rods are installed on the upper end of the corresponding semi-ring rods. The lifting plate has a through hole for threading a steel wire rope. The lifting plate has an arc-shaped sliding hole between the through hole and the guide rod. A partition arc rod is slidably connected in the arc-shaped sliding hole. The two partition arc rods are used to block the traction ball.

7. The ground source heat pump buried pipe assembly according to claim 6, characterized in that: The lower end of the arc-shaped sliding hole is provided with a movable through hole. A fixed block 1 located in the movable through hole is installed at the lower end of the blocking arc rod. A return spring is installed on the fixed block 1. A fixed block 2 is installed at the end of the return spring away from the fixed block 1. The fixed block 2 is fixedly connected to the lower end of the lifting plate.

8. The ground source heat pump buried pipe assembly according to claim 1, characterized in that: The lifting component includes a guide block installed on the side wall of the lifting plate, a lifting rod slidably passing through the guide block, the lifting rod having a T-shaped structure, a connecting block installed at the lower end of the lifting rod, the connecting block being fixedly connected to the outer ring surface of the lower semi-ring rod, and a connecting spring installed between the upper end of the lifting rod and the upper end of the guide block.

9. A ground source heat pump buried pipe assembly according to claim 5, characterized in that: The anti-buoyancy component is composed of a flow guide frame and a soil-breaking blade welded together.

10. A ground source heat pump buried pipe assembly according to claim 6, characterized in that: The upper end of the guide rod has an opening for placing the arc rod to prevent it from retracting.

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