A cold-resistant and highly flexible PVC power pipe

Abstract

The present invention belongs to the technical field of electric power pipes, and specifically relates to a cold-resistant and highly flexible PVC electric power pipe, comprising an electric power pipe main pipe, the ends of the electric power pipe main pipe are connected to a pipe welding structure, a flexible pipe is arranged on one side of the pipe welding structure, a pile position strip is arranged on the side of the electric power pipe main pipe, retaining rings are arranged on both ends of the electric power pipe main pipe, a plug is arranged on the outer side of the retaining ring, a raised ring is arranged at the end of the plug, a plurality of support strips are arranged on the inner side of the electric power pipe main pipe, and a threading inner pipe is arranged at the end of the support strip. An antifreeze protective layer is arranged on the outer side of the flexible pipe. The present invention increases the structural connection strength, prevents cold air from penetrating and freezing from the bottom, and can also play a role in cooling in summer, improves the fastening effect and sealing, and limits the bending angle, thereby protecting the internal cables and preventing excessive bending.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power pipes, and in particular relates to a cold-resistant and highly flexible PVC electric power pipe. Background Art

[0002] PVC power pipe is a modified PVC pipe with special properties. It is mainly used as a sheath pipe for power cables. It can replace the steel pipes and asbestos cement pipes currently used in the power system. During construction, the outside of the pipe does not need to be reinforced with other materials, but can be directly backfilled with sand and mud. However, the power pipe has a high hardness. The laying of the pipe needs to consider the toughness and bending degree of the pipe itself, and then plan the route for placing the pipe groove on site to avoid the situation where the pipe cannot be connected due to toughness problems after it is placed. This situation also requires special treatment, which is more troublesome. At the same time, the pipe connection needs to be moved with hot melt equipment, which is more inconvenient. Summary of the invention

[0003] The purpose of the present invention is to provide a cold-resistant and highly flexible PVC electric power pipe, which can increase the structural connection strength and prevent cold air from penetrating from the bottom and freezing. At the same time, it can also play a role in cooling in summer, improve the fastening effect and sealing, and limit the bending angle, thereby protecting the internal cables and preventing excessive bending.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A cold-resistant and highly flexible PVC electric power pipe comprises an electric power pipe main pipe, the ends of the electric power pipe main pipe are connected with pipe welding structures, a flexible pipe is arranged on one side of the pipe welding structure, a pile position strip is arranged on the side of the electric power pipe main pipe, retaining rings are arranged on both ends of the electric power pipe main pipe, an insert is arranged on the outer side of the retaining ring, a raised ring is arranged on the end of the insert, a plurality of support strips are arranged on the inner side of the electric power pipe main pipe, and a threading inner pipe is arranged at the end of the support strip.

[0006] The outer side of the flexible pipe is provided with an antifreeze protection layer, the inner side of the antifreeze protection layer is provided with a hard pipe, the side of the hard pipe is connected with a soft pipe, and the side of the hard pipe at the end is fixedly connected with a connecting pipe.

[0007] A dissolving heating wire is arranged on the inner side of the pipeline welding structure, the end of the dissolving heating wire is connected to an energized contact core, and the outer side of the energized contact core is connected to a metal fixing sheet.

[0008] The main pipeline of the power pipe is fixedly connected to the pile position bar, the retaining ring is located on the outer surface of both ends of the main pipeline of the power pipe, and has a square cross-sectional shape, the retaining ring is fixedly connected to the insert pipe, and a melt groove is provided on the surface of the insert pipe, and the insert pipe is fixedly connected to the raised ring.

[0009] The main pipeline of the power pipe is fixedly connected to the support bar, and the support bar is fixedly connected to the wire threading inner tube. The wire threading inner tube is eccentrically arranged on the inner side of the main pipeline of the power pipe, and the inner side of the main pipeline of the power pipe is tangent to the outer side of the wire threading inner tube. The support bars extend from the inner side of the main pipeline of the power pipe to the outer side of the wire threading inner tube in multiple places, and the support bars are of different lengths and have intervals. The inner side of the end of the support bar interval is fixedly connected to a liquid sealing plate, and the space enclosed by the support bar and the liquid sealing plate is filled with liquid.

[0010] The antifreeze protective layer is wrapped around the outer side of the flexible pipe, the hard pipe and the soft pipe, the outer layer of the antifreeze protective layer is evenly coated with a waterproof glue paint layer, the inner side of the antifreeze protective layer is provided with a cavity, and the inner side of the cavity is filled with liquid, the inner side of the antifreeze protective layer is bonded with a sound insulation cotton layer, and the sound insulation cotton layer and the antifreeze protective layer are an integrated structure.

[0011] The inner side surfaces of both ends of the pipe welding structure are fixedly connected with clamping ring blocks, the inner side surfaces of the clamping ring blocks are provided with contact grooves, the side surfaces of the contact grooves are fixedly connected with inner sleeve rings, and the cross-sectional shape of the inner sleeve rings is "L"-shaped, and the outer side of the inner sleeve rings is sleeved with dissolved material rings, and the dissolved material rings are easily dissolved and deformed when heated.

[0012] Inner block annular grooves are provided on the inner sides of both ends of the pipe welding structure, and the surface of the inner block annular grooves is fixedly connected to the clamping ring block. An insulating metal plate is provided on the inner side surface of the pipe welding structure, and threading holes are provided on the side surface of the insulating metal plate. The surface of the insulating metal plate is fixedly connected with equidistantly distributed tube baffles, and the end of the tube baffle is in a diamond shape protruding on both sides, and the tube baffles are distributed in a ring shape on the inner side surface of the insulating metal plate.

[0013] The top surface of the pipe welding structure is fixedly connected to a power-carrying plug-in disk, and the surface of the power-carrying plug-in disk is provided with an alignment groove. The inner side surface of the alignment groove is fixedly connected to an insulating fixing ring, and the insulating fixing ring is fixedly connected to the metal fixing plate. The insulating metal plate is a double-layer structure, and the dissolving heating wire is located on the inner side surfaces of the two layers of the insulating metal plates. The dissolving heating wire is distributed inside the insulating metal plate in an "S" shape as a whole.

[0014] The cross-sectional surface of the hard pipe is provided with four symmetrically distributed ring grooves, the inner side surface of the ring groove is snap-connected with a slot ring, the slot ring is fixedly connected to the soft pipe, the inner side surface of the hard pipe is fixedly connected with a spacer strut, and the inner side surface of the spacer strut is fixedly connected with a wire threading tube.

[0015] The technical effects achieved by the present invention are:

[0016] According to the present invention, after placing the main pipeline of the power pipe, the main pipeline of the power pipe is placed in a groove for arranging pipelines, the pile bars on both sides of the main pipeline of the power pipe are in contact with the ground in the groove, thereby preventing the main pipeline of the power pipe from rolling. In addition, the molten material clamping groove on the surface of the insertion pipe is used to fill the melted material, and the material is clamped after cooling, thereby increasing the strength of the structural connection.

[0017] In the present invention, since the liquid sealed between the support strip and the sealing plate inside the main pipeline of the power pipe, i.e., the antifreeze liquid, is mostly distributed at the bottom of the main pipeline of the power pipe, when the pipeline is arranged, the weight of the built-in liquid is utilized to correct the direction of the pipeline, and at the same time, the cable placed inside the threading inner pipe is separated from the external cold air by the antifreeze liquid between the support strip and the sealing plate, so as to prevent the cold air from penetrating from the bottom and freezing, and at the same time, it can also play a role in cooling in summer.

[0018] The present invention ensures the flexibility of the flexible pipe part so that the flexible pipe can be changed according to the shape of the groove. The part where the hard pipe and the soft pipe are connected is relatively weak. The sandwich structure formed by combining multiple materials of the anti-freeze protection layer is adopted to prevent the noise generated by water flowing through the flexible pipe from escaping outward, the sound insulation cotton layer is used to absorb the sound, and the outermost smooth waterproof material is used to reflect the noise into the pipe, thereby reducing the noise transmission.

[0019] According to the present invention, after the contact groove on the side of the clamping ring solid block contacts the raised ring at the end of the insert tube, the dissolved material ring of the solvent will be squeezed outward, and the raised ring and the contact groove will be matched, and the dissolved dissolved material ring will be used as an adhesive to connect the raised ring and the contact groove, thereby improving the fastening effect and sealing performance.

[0020] In the present invention, the dissolving heating wire contacts the dissolving material ring, and a plug of corresponding shape is inserted into the power plug disk to energize the power contact core in the insulating solid ring. When the dissolving heating wire is energized, the heat generated by the power dissolving heating wire melts the dissolving material ring, and squeezes the power pipe main pipeline and the pipeline welding structure close to each other, so that the melted dissolving material ring fills the connection gap and is bonded together.

[0021] The present invention, through the combination of the power pipe main pipe and the flexible pipe, allows the power pipe main pipe to bend when the pipe groove is arranged. The bending part of the pipe changes the bending angle of the entire flexible pipe by changing the overall deformation of the soft pipe through the mutual cooperation between the hard pipe and the soft pipe. When digging the groove for arranging the pipe, there is no need to estimate the maximum bending angle of the pipe. At the same time, the bending angle of the flexible pipe part is limited based on the mutual contact between the hard pipes, thereby protecting the internal cables and preventing excessive bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1is a schematic diagram of a front three-dimensional structure provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the main pipeline structure of the power pipe provided by an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the flexible pipeline structure provided by an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the cross-sectional structure of the antifreeze protection layer provided by an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the pipe welding structure provided by an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the internal structure of the pipeline welding structure provided by an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of the connection structure of the dissolving heating wire provided in an embodiment of the present invention;

[0029] Figure 8 It is a schematic diagram of a hard pipe connection structure provided by an embodiment of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. The main pipeline of the power pipe; 2. The pipeline welding structure; 3. The antifreeze protection layer; 4. The pile position strip; 5. The retaining ring; 6. The insert pipe; 7. The melt clamping groove; 8. The raised ring; 9. The support strip; 10. The sealing plate; 11. The inner tube for threading; 12. The flexible pipe; 13. The hard pipe; 14. The soft pipe; 15. The connecting pipe; 16. The power plug-in disk; 17. The alignment groove; 18. The insulating fixing ring; 19. The inner sleeve ring; 20. The dissolving electric heating wire; 21. The pipe baffle; 22. The clamping ring fixing block; 23. The contact groove; 24. The dissolving material ring; 25. The inner block ring groove; 26. The threading hole; 27. The heat-insulating metal plate; 28. The power contact core; 29. ​​The metal fixing sheet; 30. The ring groove; 31. The clamping groove ring; 32. The threading pipe; 33. The spacing support rod. DETAILED DESCRIPTION

[0032] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0033] like Figure 1-8As shown, a cold-resistant and highly flexible PVC electric pipe comprises an electric pipe main pipe 1, the ends of the electric pipe main pipe 1 are connected with a pipe welding structure 2, a flexible pipe 12 is arranged on one side of the pipe welding structure 2, a pile position strip 4 is arranged on the side of the electric pipe main pipe 1, retaining rings 5 ​​are arranged on the ends of both sides of the electric pipe main pipe 1, a plug 6 is arranged on the outer side of the retaining ring 5, a raised ring 8 is arranged on the end of the plug 6, a plurality of support strips 9 are arranged on the inner side of the electric pipe main pipe 1, and a threading inner pipe 11 is arranged at the end of the support strip 9.

[0034] An antifreeze protection layer 3 is arranged on the outside of the flexible pipe 12, a hard pipe 13 is arranged on the inside of the antifreeze protection layer 3, a soft pipe 14 is connected to the side of the hard pipe 13, and a connecting pipe 15 is fixedly connected to the side of the hard pipe 13 at the end.

[0035] A dissolving heating wire 20 is arranged inside the pipe welding structure 2 , and an electric contact core 28 is connected to the end of the dissolving heating wire 20 , and a metal fixing sheet 29 is connected to the outer side of the electric contact core 28 .

[0036] See attached Figure 2 The power pipe main pipeline 1 is fixedly connected to the pile position strip 4, the retaining ring 5 is located on the outer surface of both ends of the power pipe main pipeline 1, and the cross-sectional shape is square, the retaining ring 5 is fixedly connected to the insert pipe 6, and a molten material card groove 7 is opened on the surface of the insert pipe 6, and the insert pipe 6 is fixedly connected to the raised ring 8. It can be seen from the above structure that after placing the power pipe main pipeline 1 and placing the power pipe main pipeline 1 into the groove for arranging the pipeline, the pile position strips 4 on both sides of the power pipe main pipeline 1 are in contact with the ground in the groove, so as to prevent the power pipe main pipeline 1 from rolling. In addition, the molten material card groove 7 on the surface of the insert pipe 6 is used to fill the melted material, and realize the card engagement after cooling, thereby increasing the structural connection strength.

[0037] See attached Figure 2 The main pipeline 1 of the power pipe is fixedly connected to the support bar 9, and the support bar 9 is fixedly connected to the inner tube 11 of the threading wire. The inner tube 11 of the threading wire is eccentrically arranged on the inner side of the main pipeline 1 of the power pipe, and the inner side of the main pipeline 1 of the power pipe is tangent to the outer side of the inner tube 11 of the threading wire. A plurality of support bars 9 extend from the inner side of the main pipeline 1 of the power pipe to the outer side of the inner tube 11 of the threading wire, and the support bars 9 are of different lengths and have intervals. The inner side of the end of the interval of the support bar 9 is fixedly connected with a sealing plate 10, and the space enclosed by the support bar 9 and the sealing plate 10 It is filled with liquid. It can be seen from the above structure that the liquid sealed between the support bar 9 and the sealing plate 10 inside the power pipe main pipeline 1, that is, the antifreeze, is mostly distributed at the bottom of the power pipe main pipeline 1. When arranging the pipeline, the weight of the built-in liquid is used to correct the direction of the pipeline. At the same time, the cable placed inside the threading inner tube 11 is separated from the external cold air by the antifreeze between the support bar 9 and the sealing plate 10, preventing the cold air from penetrating from the bottom and freezing, and it can also play a role in cooling in summer.

[0038] See attached Figure 3 and Figure 4 The antifreeze protection layer 3 is wrapped around the outer side surfaces of the flexible pipe 12, the hard pipe 13 and the soft pipe 14, the outer layer of the antifreeze protection layer 3 is evenly coated with a waterproof glue paint layer, the inner side of the antifreeze protection layer 3 is provided with a cavity, and the inner side of the cavity is filled with liquid, the inner side of the antifreeze protection layer 3 is bonded with a sound insulation cotton layer, and the sound insulation cotton layer and the antifreeze protection layer 3 are an integrated structure. It can be seen from the above structure that in order to ensure the flexibility of the pipe part of the flexible pipe 12, the flexible pipe 12 can be changed according to the shape of the groove removed, and the part where the hard pipe 13 and the soft pipe 14 are connected is relatively weak. The sandwich structure formed by a combination of multiple materials of the antifreeze protection layer 3 is adopted to prevent the noise generated by water flowing through the flexible pipe 12 from dissipating outward, the sound insulation cotton layer is used to absorb the sound, and the outermost smooth waterproof material is used to reflect the noise into the pipe to reduce the noise transmission.

[0039] See attached Figure 5 The inner side surfaces of both ends of the pipe welding structure 2 are fixedly connected with a clamping ring block 22, and a contact groove 23 is opened on the inner side surface of the clamping ring block 22. The side surface of the contact groove 23 is fixedly connected with an inner sleeve ring 19, and the cross-sectional shape of the inner sleeve ring 19 is "L"-shaped. The outer side of the inner sleeve ring 19 is sleeved with a dissolved material ring 24, and the dissolved material ring 24 is easily dissolved and deformed when heated. It can be seen from the above structure that after the contact groove 23 on the side of the clamping ring block 22 contacts the raised ring 8 at the end of the insert pipe 6, the dissolved material ring 24 of the dissolved liquid will be squeezed outward, and the raised ring 8 and the contact groove 23 are matched, and the dissolved dissolved material ring 24 is used as an adhesive to connect the raised ring 8 with the contact groove 23, thereby improving the fastening effect and sealing performance.

[0040] See attached Figure 6 Inner block annular grooves 25 are provided on the inner sides of both ends of the pipe welding structure 2, and the surfaces of the inner block annular grooves 25 are fixedly connected to the clamping ring fixed block 22. An insulating metal plate 27 is provided on the inner side surface of the pipe welding structure 2, and threading holes 26 are provided on the side surfaces of the insulating metal plate 27. The surface of the insulating metal plate 27 is fixedly connected with equidistantly distributed pipe baffles 21, and the ends of the pipe baffles 21 are diamond-shaped and protrude on both sides. The pipe baffles 21 are distributed in a ring shape on the inner side surface of the insulating metal plate 27. It can be seen from the above structure that when the cables pass through the pipe welding structure 2, the cables for different purposes are distinguished by the pipe baffles 21 on the inner side of the pipe welding structure 2.

[0041] See attached Figure 7The top surface of the pipe welding structure 2 is fixedly connected with a power-on plug-in disk 16, and a positioning groove 17 is opened on the surface of the power-on plug-in disk 16. The inner side of the positioning groove 17 is fixedly connected with an insulating fixing ring 18, and the insulating fixing ring 18 is fixedly connected to the metal fixing plate 29. The heat-insulating metal plate 27 is a double-layer structure, and the dissolving heating wire 20 is located on the inner side of the two layers of heat-insulating metal plates 27. The dissolving heating wire 20 is distributed in an "S" shape inside the heat-insulating metal plate 27 as a whole. It can be seen from the above structure that the dissolving heating wire 20 contacts the dissolving material ring 24, and a plug of corresponding shape is inserted into the power-on plug-in disk 16 to energize the power contact core 28 in the insulating fixing ring 18. When the dissolving heating wire 20 is energized, the heat generated will melt the dissolving material ring 24, and squeeze the power pipe main pipeline 1 and the pipe welding structure 2 close to each other, so that the melted dissolving material ring 24 fills the connection gap and is bonded together.

[0042] See attached Figure 8 The cross-sectional surface of the hard pipe 13 is provided with four symmetrically distributed ring grooves 30, the inner side surface of the ring groove 30 is engaged with a groove ring 31, the groove ring 31 is fixedly connected to the soft pipe 14, the inner side surface of the hard pipe 13 is fixedly connected with a spacing strut 33, and the inner side surface of the spacing strut 33 is fixedly connected with a threading tube 32. It can be seen from the above structure that through the combination of the power pipe main pipe 1 and the flexible pipe 12, the power pipe main pipe 1 is bent by arranging the pipe groove, and the bending part of the pipe is changed by the mutual cooperation between the hard pipe 13 and the soft pipe 14, and the bending angle of the entire flexible pipe 12 is changed by changing the overall deformation of the soft pipe 14. When digging the groove for arranging the pipe, there is no need to estimate according to the maximum bending angle of the pipe. At the same time, the bending angle of the flexible pipe 12 is based on the mutual contact between the hard pipes 13, and the bending angle is limited, thereby protecting the internal cables and preventing excessive bending.

[0043] The working principle of the present invention is as follows: first, through the combination of the power pipe main pipeline 1 and the flexible pipeline 12, the power pipe main pipeline 1 is bent along the bend of the pipe groove. The bending part of the pipeline is changed by the cooperation between the hard pipeline 13 and the soft pipeline 14, and the bending angle of the entire flexible pipeline 12 is changed by changing the overall deformation of the soft pipeline 14. After the power pipe main pipeline 1 is placed in the groove for arranging the pipeline, the pile position bars 4 on both sides of the power pipe main pipeline 1 are in contact with the ground in the groove, so as to prevent the power pipe main pipeline 1 from rolling. In addition, due to the liquid sealed between the internal support bar 9 and the sealing plate 10 of the power pipe main pipeline 1, that is, the antifreeze liquid, the antifreeze liquid is mostly distributed at the bottom of the power pipe main pipeline 1. When arranging the pipeline, the built-in liquid weight is used to correct the direction of the pipeline. When connecting two power pipe main pipelines 1 or connecting When connecting the power pipe main pipeline 1 and the flexible pipeline 12, first put the side of the pipeline welding structure 2 on the outside of the plug 6 at the end of the power pipe main pipeline 1, and let the raised ring 8 at the end of the plug 6 squeeze the dissolved material ring 24 on the outside of the inner sleeve ring 19, and let the dissolved heating wire 20 contact with the dissolved material ring 24, and use a plug of corresponding shape to insert it into the power plug disk 16, and energize the powered contact core 28 in the insulating fixed ring 18. When the dissolved heating wire 20 is energized, the heat generated will melt the dissolved material ring 24, and squeeze the power pipe main pipeline 1 and the pipeline welding structure 2 close to each other, and then stop heating. At this time, the squeezed and melted dissolved material ring 24 will overflow along the outer side of the plug 6, and then fill the molten material slot 7, and block the remaining gap between the plug 6 and the inner sleeve ring 19, and wait for the dissolved material ring 24 to re-solidify after natural cooling, and the fixation is completed.

[0044] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A cold-resistant and highly flexible PVC power pipe, comprising a power pipe main pipeline (1), characterized in that: The ends of the power pipe main pipe (1) are connected to a pipe welding structure (2), a flexible pipe (12) is arranged on one side of the pipe welding structure (2), a pile position strip (4) is arranged on the side of the power pipe main pipe (1), retaining rings (5) are arranged on both ends of the power pipe main pipe (1), an insert pipe (6) is arranged on the outer side of the retaining ring (5), a raised ring (8) is arranged at the end of the insert pipe (6), a plurality of support strips (9) are arranged on the inner side of the power pipe main pipe (1), and a threading inner pipe (11) is arranged at the end of each support strip (9); An antifreeze protection layer (3) is arranged on the outside of the flexible pipe (12), a hard pipe (13) is arranged on the inside of the antifreeze protection layer (3), a soft pipe (14) is connected to the side of the hard pipe (13), and a connecting pipe (15) is fixedly connected to the side of the hard pipe (13) at the end; A dissolving heating wire (20) is arranged on the inner side of the pipe welding structure (2), the end of the dissolving heating wire (20) is connected to an electric contact core (28), and the outer side of the electric contact core (28) is connected to a metal fixing sheet (29).

2. The cold-resistant and highly flexible PVC power pipe according to claim 1, characterized in that: The main pipe of the power pipe (1) is fixedly connected to the pile position strip (4); the retaining ring (5) is located on the outer surface of both ends of the main pipe of the power pipe (1) and has a square cross-sectional shape; the retaining ring (5) is fixedly connected to the insert pipe (6); a melt retaining groove (7) is provided on the surface of the insert pipe (6); and the insert pipe (6) is fixedly connected to the raised ring (8).

3. The cold-resistant and highly flexible PVC power pipe according to claim 1, characterized in that: The power pipe main pipe (1) is fixedly connected to the support bar (9), and the support bar (9) is fixedly connected to the threading inner pipe (11). The threading inner pipe (11) is eccentrically arranged on the inner side of the power pipe main pipe (1), and the inner side of the power pipe main pipe (1) is tangent to the outer side of the threading inner pipe (11). The support bars (9) extend from the inner side of the power pipe main pipe (1) to the outer side of the threading inner pipe (11) at multiple locations, and the support bars (9) are of different lengths and have intervals. The inner side of the interval end of the support bar (9) is fixedly connected to a liquid sealing plate (10), and the space enclosed by the support bar (9) and the liquid sealing plate (10) is filled with liquid.

4. The cold-resistant and highly flexible PVC power pipe according to claim 1, characterized in that: The antifreeze protection layer (3) is wrapped around the outer side surfaces of the flexible pipe (12), the hard pipe (13) and the soft pipe (14); the outer layer of the antifreeze protection layer (3) is evenly coated with a waterproof glue paint layer; a cavity is provided on the inner side of the antifreeze protection layer (3), and the inner side of the cavity is filled with liquid; a sound insulation cotton layer is bonded to the inner side surface of the antifreeze protection layer (3), and the sound insulation cotton layer and the antifreeze protection layer (3) are an integrated structure.

5. The cold-resistant and highly flexible PVC power pipe according to claim 1, characterized in that: The inner side surfaces of both ends of the pipe welding structure (2) are fixedly connected with clamping ring blocks (22), the inner side surfaces of the clamping ring blocks (22) are provided with contact grooves (23), the side surfaces of the contact grooves (23) are fixedly connected with inner sleeve rings (19), and the cross-sectional shape of the inner sleeve ring (19) is "L" shaped, and the outer side of the inner sleeve ring (19) is sleeved with a dissolved material ring (24), and the dissolved material ring (24) is easily dissolved and deformed when heated.

6. The cold-resistant and highly flexible PVC power pipe according to claim 1, characterized in that: The inner sides of both ends of the pipe welding structure (2) are provided with inner block annular grooves (25), the surfaces of the inner block annular grooves (25) are fixedly connected to the clamping ring block (22), the inner side surface of the pipe welding structure (2) is provided with a heat-insulating metal plate (27), the side surface of the heat-insulating metal plate (27) is provided with threading holes (26), the surface of the heat-insulating metal plate (27) is fixedly connected with equidistantly distributed pipe baffles (21), the ends of the pipe baffles (21) are in a rhombus shape and protrude on both sides, and the pipe baffles (21) are distributed in a ring shape on the inner side surface of the heat-insulating metal plate (27).

7. The cold-resistant and highly flexible PVC power pipe according to claim 6, characterized in that: The top surface of the pipe welding structure (2) is fixedly connected to a power plug disk (16), the surface of the power plug disk (16) is provided with a positioning groove (17), the inner side surface of the positioning groove (17) is fixedly connected to an insulating fixing ring (18), the insulating fixing ring (18) is fixedly connected to a metal fixing plate (29), the heat-insulating metal plate (27) is a double-layer structure, the dissolving heating wire (20) is located on the inner side surfaces of the two layers of the heat-insulating metal plate (27), and the dissolving heating wire (20) is distributed inside the heat-insulating metal plate (27) in an "S" shape as a whole.

8. The cold-resistant and highly flexible PVC power pipe according to claim 4, characterized in that: The cross-sectional surface of the hard pipe (13) is provided with four symmetrically distributed ring grooves (30), the inner side surface of the ring groove (30) is snap-connected with a slot ring (31), the slot ring (31) is fixedly connected to the soft pipe (14), the inner side surface of the hard pipe (13) is fixedly connected with a spacing support rod (33), and the inner side surface of the spacing support rod (33) is fixedly connected with a threading tube (32).

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