External pretreatment and installation method of ground source heat pump buried pipe

Abstract

The invention discloses an external pretreatment structure of a ground source heat pump buried pipe and a mounting method thereof.The external pretreatment structure comprises a pipe body, the outer surface of the pipe body is coated with a wear-resistant coating, the outer side of the wear-resistant coating is coated with a corrosion-resistant coating, a first protective sleeve is fixedly assembled on the outer side of the pipe body, and a second protective sleeve is arranged on the outer side of the first protective sleeve; a supporting net is fixedly connected between the first protective sleeve and the second protective sleeve. According to the external pretreatment structure of the ground source heat pump buried pipe, the outer surface of the pipe body is firstly coated with the abrasion-resistant coating, the coating is made of polyurethane materials, good abrasion resistance is achieved, abrasion of soil particles to the pipe body can be effectively resisted, and therefore the service life of the pipe body is prolonged; the corrosion-resistant coating is further smeared, the polyethylene material is adopted, and the coating has excellent corrosion resistance and can effectively prevent underground water or other chemical substances from corroding the pipe body.

Description

Technical Field

[0001] The invention relates to the technical field of buried pipe structures, and in particular to an external pretreatment method of a buried pipe of a ground source heat pump and an installation method thereof. Background Art

[0002] As energy utilization and environmental protection are increasingly valued, geothermal heat pumps, as an efficient and environmentally friendly heating and cooling technology, have been widely used in the construction field. Geothermal heat pumps achieve energy conversion and utilization by exchanging heat with soil or groundwater through buried pipes. However, due to the long-term underground burial of buried pipes, they are affected by a variety of factors such as wear of soil particles, erosion of groundwater, and soil pressure, and their service life and performance stability face severe challenges.

[0003] Existing ground source heat pump buried pipes usually adopt a single pipe body structure, with only an anti-corrosion coating on the outer layer. The lack of sufficient protective measures makes the pipe body susceptible to wear and corrosion, thus affecting the overall performance and service life of the ground source heat pump system. In addition, during the installation of the buried pipe, due to the complex and changeable soil environment, the existing fixing methods often cannot ensure the stability and safety of the pipe body. Summary of the invention

[0004] The purpose of the present invention is to provide an external pretreatment method for a ground source heat pump buried pipe and an installation method thereof, so as to solve the problem raised in the above background technology that the existing ground source heat pump buried pipes usually adopt a single pipe body structure, and the outer layer is only coated with an anti-corrosion coating, lacking sufficient protective measures, resulting in the pipe body being susceptible to wear and corrosion, thereby affecting the overall performance and service life of the ground source heat pump system. In addition, during the installation of the buried pipe, due to the complex and changeable soil environment, the existing fixing method is often difficult to ensure the stability and safety of the pipe body.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an external pretreatment structure of a buried pipe of a ground source heat pump, comprising a pipe body, the outer surface of the pipe body being coated with a wear-resistant coating, the outer side of the wear-resistant coating being coated with a corrosion-resistant coating, the outer side of the pipe body being fixedly equipped with a protective sleeve 1, the outer side of the protective sleeve 1 being provided with a protective sleeve 2, a supporting net being fixedly connected between the protective sleeve 1 and the protective sleeve 2, an external frame 1 and an external frame 2 being provided on the outer side of the protective sleeve 2, a clamping plate being fixedly connected at the top and bottom positions of one side of the external frame 2, a clamping slot being provided at the top and bottom positions of one side of the external frame 1, one side of the clamping plate extending through the interior of the clamping slot and being clamped in the clamping slot, a limited position being provided at the center of one end of the clamping plate A slot, a fixing slot is provided at the top and bottom positions of one end of the card plate, a connecting plate is fixedly connected to one side of the slot, a limiting rod is fixedly connected to the center of one side of the connecting plate, one side of the limiting rod penetrates into the interior of the limiting slot and is clamped in the limiting slot, a fixing plate is fixedly connected to the top and bottom of one end of the connecting plate, one side of the fixing plate penetrates into the interior of the fixing slot and is clamped in the fixing slot, a plurality of arc grooves are provided at one end position of the limiting slot corresponding to the interior of the card plate, a plurality of elastic clips are movably assembled at one side position of the limiting rod surface, one side of the elastic clip penetrates into the interior of the arc groove and is clamped in the arc groove, the external frame 1 and the external frame 2 as well as the protective sleeve 1 and the protective sleeve 2 are all made of thermally conductive plastic.

[0006] Preferably, a heat-conducting filling layer is provided inside the supporting net, the wear-resistant coating is made of polyurethane, and the corrosion-resistant coating is made of polyethylene.

[0007] Preferably, a plurality of anti-slip balls are fixedly connected to the inner walls of the external frame 1 and the external frame 2, and the inner sides of the anti-slip balls are in close contact with the outer side of the protective sleeve 2.

[0008] Preferably, a groove is provided at the center of one end of the fixing plate, and one side of the top and bottom of the fixing plate is designed to be in an arc shape.

[0009] Preferably, a sealing gasket 1 and a sealing gasket 2 are fixedly connected to opposite ends of the external frame 1 and the external frame 2, respectively, and the sealing gasket 1 and the sealing gasket 2 are in close contact with each other.

[0010] Preferably, a water diversion groove is provided on one side of the external frame 1 and the external frame 2 opposite to each other, and auxiliary pull rods are fixedly installed on both sides of the water diversion groove on the one side of the external frame 1 and the external frame 2 opposite to each other.

[0011] A method for installing an external pretreatment structure of a ground source heat pump buried pipe comprises the following steps:

[0012] Step 1: After the pipe body is manufactured, a wear-resistant coating is first applied on its outer surface. The wear-resistant coating is made of polyurethane and has good wear resistance. It can protect the pipe body from the wear of soil particles. A corrosion-resistant coating is applied on the outside of the wear-resistant coating. The corrosion-resistant coating is made of polyethylene and has excellent corrosion resistance. It can effectively prevent groundwater or other chemicals from corroding the pipe body.

[0013] Step 2: Fix and assemble protective sleeve 1 on the outside of the tube body. The protective sleeves together further protect the tube body. Set protective sleeve 2 on the outside of protective sleeve 1, and fix a support net between the two. A thermal conductive filling layer, such as thermal conductive sand material, can be set inside the support net to enhance the stability and thermal conductivity of the structure.

[0014] Step three, set external frame one and external frame two on the outside of protective sleeve two, and the two are connected by a clamping plate and a clamping slot. The limit slot on the clamping plate cooperates with the limit rod on the connecting plate to ensure a stable connection between the external frames. At the same time, the clamping connection between the fixing plate and the fixing slot further enhances the stability of the connection. The groove and arc design on the fixing plate facilitate docking with the fixing slot. The clamping connection between the elastic clamp and the arc groove provides an additional fixing effect to prevent the clamping plate from loosening during use. Then, fix the clamping plate with bolts.

[0015] Step 4: Anti-skid balls are fixed to the inner walls of the external frame 1 and the external frame 2 to ensure that they fit tightly with the outer side of the protective sleeve 2 to prevent sliding. Sealing pads 1 and 2 are respectively provided at the opposite ends of the external frame 1 and the external frame 2. When the two fit tightly, the sealing pads can effectively prevent groundwater or other liquids from penetrating into the structure. Water diversion grooves are provided on the opposite sides of the external frame 1 and the external frame 2 to guide the infiltrated water flow and avoid water accumulation inside the structure. When backfilling around the buried pipe, backfill materials with good thermal conductivity, such as gravel and thermal conductive soil, are used to improve the thermal conductivity between the soil and the pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The external pretreatment structure of the buried pipe of the ground source heat pump is firstly applied with a wear-resistant coating on the outer surface of the pipe body. The coating is made of polyurethane and has good wear resistance. It can effectively resist the wear of soil particles on the pipe body, thereby extending the service life of the pipe body. On the outside of the wear-resistant coating, the present invention further applies a corrosion-resistant coating. The polyethylene material is used. This coating has excellent corrosion resistance and can effectively prevent the erosion of the pipe body by groundwater or other chemicals, thereby ensuring the stable operation of the pipe body in a complex underground environment. By fixing and assembling protective sleeve one and protective sleeve two on the outside of the pipe body and arranging a supporting net between the two, the present invention constructs a solid protective layer, which significantly enhances the overall structural stability of the buried pipe. The thermal conductive filling layer (thermal conductive sand) arranged inside the supporting net not only further enhances the stability of the structure The external frame 1 and the external frame 2 are connected by means of the clamping method of the clamping plate and the clamping groove, and the limit groove, the limit rod, the fixing groove and the fixing plate are cooperated to realize the stable connection between the buried pipe and the external frame, and the loosening and displacement of the buried pipe during installation and use are effectively prevented. The anti-slip balls on the inner walls of the external frame 1 and the external frame 2 fit tightly with the outer side of the protective sleeve 2, effectively preventing the sliding between the external frame and the protective sleeve, and further enhancing the stability of the structure. The setting of the sealing pad 1 and the sealing pad 2 ensures the tight fit between the external frame 1 and the external frame 2, effectively preventing groundwater or other liquids from penetrating into the structure, and ensuring the safe operation of the buried pipe. The design of the water diversion trough can timely guide the infiltrated water flow to avoid the accumulation of water inside the structure, and further improve the waterproof performance of the buried pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0020] Figure 3 For the present invention Figure 2 A is a partial enlarged schematic diagram;

[0021] Figure 4 For the present invention Figure 2 A partial enlarged schematic diagram of B in the middle;

[0022] Figure 5 It is a structural stereogram of the card board of the present invention;

[0023] Figure 6 It is a structural stereogram of the fixing plate of the present invention.

[0024] In the figure: 1. tube body; 2. wear-resistant coating; 3. corrosion-resistant coating; 4. protective sleeve 1; 5. protective sleeve 2; 6. support net; 7. thermal conductive filling layer; 8. external frame 1; 9. external frame 2; 10. anti-slip ball; 11. slot; 12. card plate; 13. limit slot; 14. fixed slot; 15. fixed plate; 16. limit rod; 17. arc slot; 18. elastic clip; 19. sealing gasket 1; 20. sealing gasket 2; 21. water diversion groove; 22. connecting plate; 23. groove; 24. auxiliary pull rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-6 The present invention provides a technical solution: an external pretreatment structure of a buried pipe of a ground source heat pump, comprising a pipe body 1, the outer surface of the pipe body 1 is coated with a wear-resistant coating 2, the outer side of the wear-resistant coating 2 is coated with a corrosion-resistant coating 3, a protective sleeve 1 4 is fixedly assembled on the outer side of the pipe body 1, a protective sleeve 2 5 is arranged on the outer side of the protective sleeve 1 4, a supporting net 6 is fixedly connected between the protective sleeve 1 4 and the protective sleeve 2 5, an external frame 1 8 and an external frame 2 9 are arranged on the outer side of the protective sleeve 2 5, a clamping plate 12 is fixedly connected to the top position and the bottom position of one side of the external frame 2 9, a clamping groove 11 is opened at the top position and the bottom position of one side of the external frame 8, one side of the clamping plate 12 penetrates into the interior of the clamping groove 11 and is clamped with the clamping groove 11, and a clamping plate 12 is opened at the center of one end of the clamping plate 12 There is a limiting groove 13, and fixing grooves 14 are provided at the top and bottom positions of one end of the card plate 12. A connecting plate 22 is fixedly connected to one side of the card slot 11, and a limiting rod 16 is fixedly connected to the center of one side of the connecting plate 22. One side of the limiting rod 16 penetrates into the interior of the limiting groove 13 and is clamped with the limiting groove 13. A fixing plate 15 is fixedly connected to the top and bottom of one end of the connecting plate 22. One side of the fixing plate 15 penetrates into the interior of the fixing groove 14 and is clamped with the fixing groove 14. A plurality of arc grooves 17 are provided at one end position of the card plate 12 corresponding to the limiting groove 13. A plurality of elastic clips 18 are movably assembled at one side position of the surface of the limiting rod 16. One side of the elastic clip 18 penetrates into the interior of the arc groove 17 and is clamped with the arc groove 17.

[0027] Preferably, the external frame 1 8 and the external frame 2 9 as well as the protective sleeve 1 4 and the protective sleeve 2 5 are all made of thermally conductive plastic.

[0028] Preferably, a heat-conducting filling layer 7 is provided inside the support net 6, the wear-resistant coating 2 is made of polyurethane, which has good wear resistance, and the corrosion-resistant coating 3 is made of polyethylene, which has excellent corrosion resistance.

[0029] Preferably, a plurality of anti-skid balls 10 are fixedly connected to the inner walls of the external frame 1 8 and the external frame 2 9 , and the inner sides of the anti-skid balls 10 are in close contact with the outer sides of the protective sleeve 2 5 .

[0030] Preferably, a groove 23 is provided at the center of one end of the fixing plate 15, and one side of the top and bottom of the fixing plate 15 is designed to be in an arc shape.

[0031] Preferably, a sealing gasket 19 and a sealing gasket 20 are fixedly connected to opposite ends of the external frame 1 8 and the external frame 2 9 respectively, and the sealing gasket 1 19 and the sealing gasket 2 20 are tightly attached to each other.

[0032] Preferably, a water diversion groove 21 is provided on the opposite side of the external frame 1 8 and the external frame 2 9, and auxiliary pull rods 24 are fixedly installed on both sides of the water diversion groove 21 on the opposite side of the external frame 1 8 and the external frame 2 9, which can facilitate the user to disassemble the external frame 1 8 and the external frame 2 9, thereby facilitating the operation.

[0033] Preferably, a method for installing an external pretreatment structure of a buried pipe of a ground source heat pump comprises the following steps:

[0034] Step 1: After the pipe body 1 is manufactured, a wear-resistant coating 2 is first applied on its outer surface. The wear-resistant coating 2 is made of polyurethane and has good wear resistance. It can protect the pipe body 1 from the wear of soil particles. A corrosion-resistant coating 3 is applied on the outside of the wear-resistant coating 2. The corrosion-resistant coating 3 is made of polyethylene and has excellent corrosion resistance. It can effectively prevent the erosion of the pipe body 1 by groundwater or other chemicals.

[0035] Step 2: A protective sleeve 4 is fixedly assembled on the outside of the tube body 1. The protective sleeve 4 serves to further protect the tube body 1. A protective sleeve 2 5 is arranged on the outside of the protective sleeve 4, and a support net 6 is fixedly connected between the two. A thermal conductive filling layer 7, such as thermal conductive sand material, can be arranged inside the support net 6 to enhance the stability and thermal conductivity of the structure.

[0036] Step three, an external frame 1 8 and an external frame 2 9 are set on the outside of the protective sleeve 2 5, and the two are connected by a clamping plate 12 and a clamping groove 11. The limiting groove 13 on the clamping plate 12 cooperates with the limiting rod 16 on the connecting plate 22 to ensure a stable connection between the external frames. At the same time, the clamping of the fixing plate 15 and the fixing groove 14 further enhances the stability of the connection. The groove 23 and the arc design on the fixing plate 15 facilitate docking with the fixing groove 14. The clamping of the elastic clamp 18 and the arc groove 17 provides an additional fixing effect to prevent the clamping plate 12 from loosening during use. Then, the clamping plate 12 is fixed by bolts. The design of the bolts can facilitate the user to disassemble and assemble the external structure.

[0037] Step 4. Anti-skid balls 10 are fixed to the inner walls of the external frame 1 8 and the external frame 2 9 to ensure that they fit tightly with the outer side of the protective sleeve 2 5 to prevent sliding. The opposite ends of the external frame 1 8 and the external frame 2 9 are respectively provided with sealing gaskets 19 and 20. When the two fit tightly, the sealing gaskets can effectively prevent groundwater or other liquids from penetrating into the structure. A water diversion ditch 21 is provided on the opposite side of the external frame 1 8 and the external frame 2 9 to guide the infiltrated water flow and avoid water accumulation inside the structure. When backfilling around the buried pipe, backfill materials with good thermal conductivity, such as gravel and thermal conductive soil, are used to improve the thermal conductivity between the soil and the pipeline.

[0038] In summary: the external pretreatment structure of the buried pipe of the ground source heat pump is firstly applied with a wear-resistant coating 2 on the outer surface of the pipe body 1. The coating is made of polyurethane and has good wear resistance. It can effectively resist the wear of soil particles on the pipe body 1, thereby extending the service life of the pipe body 1. On the outside of the wear-resistant coating 2, the present invention further applies a corrosion-resistant coating 3, which is made of polyethylene. This coating has excellent corrosion resistance and can effectively prevent the erosion of the pipe body 1 by groundwater or other chemicals, thereby ensuring the stable operation of the pipe body 1 in a complex underground environment. By fixing and assembling a protective sleeve 4 and a protective sleeve 2 5 on the outside of the pipe body 1 and arranging a support net 6 therebetween, the present invention constructs a solid protective layer, which significantly enhances the overall structural stability of the buried pipe. The thermal conductive filling layer 7 (thermal conductive sand) arranged inside the support net 6 not only further enhances the stability of the structure, but also The thermal conductivity of the entire structure can be improved. The external frame 1 8 and the external frame 2 9 are connected by the clamping method of the clamping plate 12 and the clamping groove 11. In combination with the limit groove 13, the limit rod 16, the fixing groove 14 and the fixing plate 15, a stable connection between the buried pipe and the external frame is achieved, which effectively prevents the loosening and displacement of the buried pipe during installation and use. The anti-slip balls 10 on the inner walls of the external frame 1 8 and the external frame 2 9 fit tightly with the outer side of the protective sleeve 2 5, which effectively prevents sliding between the external frame and the protective sleeve, further enhancing the stability of the structure. The setting of the sealing pad 19 and the sealing pad 20 ensures a tight fit between the external frame 1 8 and the external frame 2 9, effectively preventing groundwater or other liquids from penetrating into the structure, and ensuring the safe operation of the buried pipe. The design of the water diversion trough 21 can timely guide the infiltrated water flow to avoid water accumulation inside the structure, further improving the waterproof performance of the buried pipe.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external pretreatment structure of a ground source heat pump buried pipe, comprising a pipe body (1), characterized in that: The outer surface of the tube body (1) is coated with a wear-resistant coating (2), and the outer side of the wear-resistant coating (2) is coated with a corrosion-resistant coating (3). The outer side of the tube body (1) is fixedly equipped with a protective sleeve (4), and the outer side of the protective sleeve (4) is provided with a protective sleeve (5). A support net (6) is fixedly connected between the protective sleeve (4) and the protective sleeve (5). The outer side of the protective sleeve (5) is provided with an external frame (8) and an external frame (9). A clamping plate (12) is fixedly connected at the top position and the bottom position of one side of the external frame (9). A clamping groove (11) is provided at the top position and the bottom position of one side of the external frame (8). One side of the clamping plate (12) penetrates into the interior of the clamping groove (11) and is clamped with the clamping groove (11). A limiting groove (13) is provided at the center of one end of the clamping plate (12). A fixing groove (14) is provided at the top and bottom of the end, a connecting plate (22) is fixedly connected to one side of the clamping groove (11), a limiting rod (16) is fixedly connected to the center of one side of the connecting plate (22), one side of the limiting rod (16) penetrates into the inside of the limiting groove (13) and is clamped with the limiting groove (13), a fixing plate (15) is fixedly connected to the top and bottom of one end of the connecting plate (22), one side of the fixing plate (15) penetrates into the inside of the fixing groove (14) and is clamped with the fixing groove (14), a plurality of arc grooves (17) are provided in the inside of the clamping plate (12) corresponding to the position near one end of the limiting groove (13), a plurality of elastic clamps (18) are movably assembled at the position near one side of the surface of the limiting rod (16), one side of the elastic clamp (18) penetrates into the inside of the arc groove (17) and is clamped with the arc groove (17).

2. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: The external frame 1 (8) and the external frame 2 (9) as well as the protective sleeve 1 (4) and the protective sleeve 2 (5) are all made of heat-conducting plastic.

3. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: A heat-conducting filling layer (7) is arranged inside the supporting net (6), the material used for the wear-resistant coating (2) is polyurethane, and the material used for the corrosion-resistant coating (3) is polyethylene.

4. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: The inner walls of the external frame 1 (8) and the external frame 2 (9) are fixedly connected with a plurality of anti-skid balls (10), and the inner sides of the anti-skid balls (10) are in close contact with the outer sides of the protective sleeve 2 (5).

5. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: A groove (23) is provided at the center of one end of the fixing plate (15), and one side of the top and bottom of the fixing plate (15) is designed to be in an arc shape.

6. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: The opposite ends of the external frame 1 (8) and the external frame 2 (9) are respectively fixedly connected with a sealing gasket 1 (19) and a sealing gasket 2 (20), and the sealing gasket 1 (19) and the sealing gasket 2 (20) are tightly attached to each other.

7. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: A water diversion groove (21) is provided on the opposite sides of the external frame 1 (8) and the external frame 2 (9), and auxiliary pull rods (24) are fixedly installed on both sides of the water diversion groove (21) on the opposite sides of the external frame 1 (8) and the external frame 2 (9).

8. The external pretreatment structure of the buried pipe of a ground source heat pump according to claim 1, characterized in that: A bolt is threadedly connected to one side of the top of the external frame (8), and the bottom of the bolt penetrates into the interior of the clamping plate (12) and is threadedly connected to the clamping plate (12).

9. The method for installing the external pretreatment structure of the buried pipe of a ground source heat pump according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: After the pipe body (1) is manufactured, a wear-resistant coating (2) is first applied to its outer surface. The wear-resistant coating (2) is made of polyurethane and has good wear resistance, protecting the pipe body (1) from wear by soil particles. A corrosion-resistant coating (3) is applied to the outer side of the wear-resistant coating (2). The corrosion-resistant coating (3) is made of polyethylene and has excellent corrosion resistance, preventing the pipe body (1) from being corroded by groundwater or other chemicals. Step 2: A protective sleeve 1 (4) is fixedly assembled on the outer side of the tube body (1), and the protective sleeve 1 (4) plays a role in further protecting the tube body (1). A protective sleeve 2 (5) is arranged on the outer side of the protective sleeve 1 (4), and a support net (6) is fixedly connected between the two. A heat-conducting filling layer (7), such as a heat-conducting sand material, is arranged inside the support net (6) to enhance the stability and heat-conducting performance of the structure; Step three, an external frame one (8) and an external frame two (9) are arranged on the outside of the protective sleeve two (5), and the two are connected by a clamping plate (12) and a clamping groove (11). The limiting groove (13) on the clamping plate (12) cooperates with the limiting rod (16) on the connecting plate (22) to ensure a stable connection between the external frames. At the same time, the clamping of the fixing plate (15) and the fixing groove (14) further enhances the stability of the connection. The groove (23) and arc design on the fixing plate (15) facilitate docking with the fixing groove (14). The clamping of the elastic clamp (18) and the arc groove (17) provides an additional fixing effect to prevent the clamping plate (12) from loosening during use. Then, the clamping plate (12) is fixed by bolts; Step 4: Anti-skid balls (10) are fixed to the inner walls of the external frame 1 (8) and the external frame 2 (9) to ensure that they are tightly fitted to the outer side of the protective sleeve 2 (5) to prevent sliding. The opposite ends of the external frame 1 (8) and the external frame 2 (9) are respectively provided with a sealing gasket 1 (19) and a sealing gasket 2 (20). When the two are tightly fitted, the sealing gaskets effectively prevent groundwater or other liquids from penetrating into the structure. The opposite sides of the external frame 1 (8) and the external frame 2 (9) are provided with a water diversion groove (21) to guide the infiltrated water flow and avoid water accumulation in the structure. When backfilling around the buried pipe, backfill materials with good thermal conductivity, such as gravel and thermal conductive soil, are used to improve the thermal conductivity between the soil and the pipe.

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