Heat supply overhead hot water thermal insulation pipe

Abstract

The utility model relates to the field of heat preservation pipelines, and discloses a heat supply overhead hot water heat preservation pipe which comprises a steel pipe, a heat preservation layer is fixedly arranged on the steel pipe in the axial direction, a connecting external thread is arranged at one end of the steel pipe in the axial direction, a limiting ring is arranged at one end, close to the connecting external thread, of the steel pipe in a sleeved mode, and a plurality of guide blocks are fixedly arranged on the limiting ring in the circumferential direction. Mounting grooves are axially formed in the ends, deviating from the guide blocks, of the steel pipes, a plurality of guide grooves communicating with the mounting grooves are formed in the steel pipes, and the guide grooves correspond to the guide blocks one to one; the steel pipe is provided with a limiting assembly for limiting the limiting ring, and a connecting internal thread matched with the connecting external thread is arranged in the mounting groove. The coaxiality between the adjacent steel pipes can be guaranteed, and the probability of deflection of the adjacent steel pipes can be reduced conveniently.

Description

Technical Field

[0001] The utility model relates to the field of heat-insulating pipes, in particular to an overhead hot water heat-insulating pipe for heating. Background Art

[0002] Overhead hot water insulation pipe is an insulation pipe used to transport hot water or other heat media. Its structural feature is that the insulation pipe is installed overhead and does not touch the ground or wall. This pipe is usually composed of working steel pipe, insulation layer and protective layer. The main advantages of overhead hot water insulation pipe include: good insulation effect, small footprint, full use of effective space above the ground, reduced ground construction costs, and easy maintenance. Since the pipeline is installed overhead, it is also convenient for regular inspection and maintenance.

[0003] Overhead hot water insulation pipes are widely used in urban heating, industrial production and civil hot water, especially in some occasions where long-distance hot water transportation is required, overhead hot water insulation pipes are more widely used.

[0004] With regard to the above-mentioned related technologies, hot water insulation pipes are usually connected by welding or threaded connection. However, the hot water insulation pipes are relatively long. When the installers connect the two hot water insulation pipes, it is difficult to ensure the coaxiality of the two hot water insulation pipes, which makes the insulation pipes prone to deflection during installation. The deflected insulation pipes are prone to leakage and other quality and safety problems after long-term use, which reduces the service life of the pipes. Utility Model Content

[0005] In order to reduce the probability of deflection of pipeline connections and improve the quality of pipeline connections, the present application provides an overhead hot water insulation pipe for heating.

[0006] The present application provides a heating overhead hot water insulation pipe, which adopts the following technical solution:

[0007] A heating overhead hot water insulation pipe comprises a steel pipe, wherein the steel pipe is fixedly provided with an insulation layer along the axial direction, a connecting external thread is provided at one end of the steel pipe along the axial direction, a limiting ring is sleeved at one end of the steel pipe close to the connecting external thread, and a plurality of guide blocks are fixedly provided on the limiting ring along the circumferential direction; an installation groove is provided along the axial direction at one end of the steel pipe away from the guide block, the steel pipe is provided with a plurality of guide grooves connected with the installation groove, and the guide grooves correspond to the guide blocks one by one; the steel pipe is provided with a limiting assembly for limiting the limiting ring, and a connecting internal thread matched with the connecting external thread is provided in the installing groove.

[0008] By adopting the above technical scheme, when installing the insulation pipe, the limit ring is inserted into the installation groove of the adjacent steel pipe, so that the guide block corresponds to the guide groove, the steel pipe is pushed manually, and the limit assembly limits the limit ring, so that the steel pipe drives the limit ring to move along the axial direction of the steel pipe, and the guide block is inserted into the corresponding guide groove. When the end of the guide block close to the connecting external thread collides with the adjacent steel pipe, the steel pipe is continued to be pushed manually to make the connecting internal thread correspond to the connecting external thread, and the steel pipe is rotated manually to connect the two steel pipes to be connected through the connecting internal thread and the connecting external thread, which is beneficial to ensure the coaxiality between the adjacent steel pipes and reduce the probability of deviation of the adjacent steel pipes.

[0009] Optionally, the inner ring of the limit ring is fixedly provided with a plurality of limit blocks along the circumferential direction, and the steel pipe is provided with a plurality of limit grooves corresponding to the limit blocks along the circumferential direction, and the limit blocks are respectively located in the corresponding limit grooves and are slidably connected to the steel pipe.

[0010] By adopting the above technical solution, when adjacent steel pipes are butt-jointed, the limit block is located in the limit groove, and the steel pipe limits the limit ring through the limit block and the limit groove. When the guide block is aligned with the guide groove of the adjacent steel pipe, the probability of the limit ring rotating can be reduced, and the connection of adjacent steel pipes is more convenient.

[0011] Optionally, the limiting assembly includes a retaining ring and a limiting spring, the retaining ring is sleeved on the steel pipe and fixedly connected to the steel pipe, the limiting spring is sleeved on the steel pipe, and the two connecting ends of the limiting spring are respectively fixedly connected to the retaining ring and the limiting ring.

[0012] By adopting the above technical scheme, when a person manually pushes the steel pipe to move axially, the retaining ring limits the limit ring through the limit spring, so that the limit ring can move with the steel pipe, which is convenient for achieving the effect of limiting the limit ring; when the guide block collides with the adjacent steel pipe, the person manually continues to push the steel pipe, and the adjacent steel pipe and the retaining ring cooperate to squeeze the limit spring, causing the limit spring to undergo elastic deformation, and as the steel pipe continues to move, the limit block separates from the limit groove, avoiding interference between the limit block and the steel pipe, thereby ensuring that the two adjacent steel pipes can be connected normally.

[0013] Optionally, a first flange is fixedly provided at one end of the steel pipe close to the limiting ring, and a plurality of arc-shaped holes are opened axially on the first flange; a second flange is fixedly provided at the end of the steel pipe away from the limiting ring, and a plurality of threaded holes are opened axially on the second flange, and the threaded holes correspond one-to-one to the arc-shaped holes.

[0014] By adopting the above technical solution, when adjacent steel pipes are connected by connecting external threads and connecting internal threads, the distance between the first flange and the second flange of the adjacent steel pipe gradually decreases until the first flange conflicts with the second flange. The arc-shaped strip holes are beneficial to reducing the probability of the first flange blocking the threaded holes, thereby ensuring that the first flange and the second flange can be locked by bolts.

[0015] Optionally, a sealing groove is formed at one end of the first flange away from the limiting ring, and a sealing ring is fixedly provided on the first flange, and the sealing ring is arranged in the sealing groove.

[0016] By adopting the above technical solution, when the first flange and the second flange are in tight contact, the first flange and the second flange cooperate to squeeze the sealing ring, causing the sealing ring to deform and fill the gap between the first flange and the second flange, thereby achieving the effect of sealing the connection between adjacent steel pipes.

[0017] Optionally, the first flange is provided with an installation assembly, which includes a first connecting ring, a second connecting ring, a first locking plate, a second locking plate, a locking pin and a handle, the first connecting ring is hinged to the second connecting ring, the first locking plate is fixedly connected to the first connecting ring, the second locking plate is fixedly connected to the second connecting ring and corresponds to the first locking plate, the locking pin is rotatably connected to the first locking plate, the end of the locking pin facing away from the first locking plate is provided with a locking external thread, the second locking plate is provided with a locking groove corresponding to the locking pin, and the handle is threadedly connected to the locking pin via the locking external thread.

[0018] By adopting the above technical scheme, the first flange is made to contact with the first connecting ring, and the second connecting ring is rotated manually to make the second connecting ring contact with the first flange. The square locking pin is rotated toward the second locking plate to make the locking pin enter the locking groove. The handle is rotated around the axis of the locking pin to move toward the second locking plate and make the handle contact with the second locking plate. The installer does not need to carry installation tools such as wrenches and bolts when installing at high altitude, and the installation of the insulation pipe is more convenient.

[0019] Optionally, both the first connecting ring and the second connecting ring are provided with a receiving groove, and both the first connecting ring and the second connecting ring are rotatably connected to a plurality of transmission shafts in a circumferential direction, and the transmission shafts are evenly distributed in the receiving groove.

[0020] By adopting the above technical solution, when the insulation pipe is installed, the first flange is in conflict with the transmission shaft. When the steel pipe is rotated, the transmission shaft can convert sliding friction into rolling friction, which is beneficial to reduce the resistance of the steel pipe rotation and facilitate the effect of rotating the steel pipe.

[0021] Optionally, the locking pin sleeve is provided with a locking spring, and two ends of the locking spring along the length direction are respectively in contact with the first locking plate and the handle.

[0022] By adopting the above technical solution, when the handle moves toward the second locking plate, the handle and the first locking plate cooperate to squeeze the locking spring, causing the locking spring to undergo elastic deformation. The reaction force of the locking spring can reduce the probability of the handle loosening, which is beneficial to ensuring the stability of the connection between the mounting assembly and the first flange.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When installing the insulation pipe, insert the limit ring into the installation groove of the adjacent steel pipe, make the guide block correspond to the guide groove, push the steel pipe manually, and the limit assembly limits the limit ring, so that the steel pipe drives the limit ring to move along the axial direction of the steel pipe, and the guide block is inserted into the corresponding guide groove. When the end of the guide block close to the connecting external thread conflicts with the adjacent steel pipe, continue to push the steel pipe manually to make the connecting internal thread correspond to the connecting external thread, and rotate the steel pipe manually to connect the two steel pipes to be connected through the connecting internal thread and the connecting external thread, which is conducive to ensuring the coaxiality between the adjacent steel pipes and reducing the probability of deflection of the adjacent steel pipes;

[0025] 2. When the adjacent steel pipes are butt-jointed, the limit block is located in the limit groove, and the steel pipe limits the limit ring through the limit block and the limit groove. When the guide block is aligned with the guide groove of the adjacent steel pipe, the probability of the limit ring rotating can be reduced, and the connection of the adjacent steel pipes is more convenient;

[0026] 3. When the steel pipe is pushed axially by hand, the retaining ring limits the limit ring through the limit spring, so that the limit ring can move with the steel pipe, which is convenient for achieving the effect of limiting the limit ring; when the guide block conflicts with the adjacent steel pipe, the steel pipe continues to be pushed by hand, and the adjacent steel pipe and the retaining ring cooperate to squeeze the limit spring, causing the limit spring to undergo elastic deformation. As the steel pipe continues to move, the limit block is separated from the limit groove, avoiding interference between the limit block and the steel pipe, and ensuring that the two adjacent steel pipes can be connected normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic diagram of the overall structure of an overhead hot water insulation pipe for heating.

[0028] Figure 2 Schematic diagram to highlight the position of the guide block and the limit block.

[0029] Figure 3 Schematic diagram to highlight the position of the receiving groove and the transmission shaft.

[0030] Figure 4 The schematic diagram is intended to highlight the positions of the first locking plate and the second locking plate.

[0031] Explanation of the accompanying drawings: 1. Steel pipe; 2. Insulation layer; 3. Limiting ring; 4. Limiting assembly; 5. First flange; 6. Second flange; 7. Mounting assembly; 11. Connecting external thread; 12. Mounting groove; 13. Guide groove; 14. Connecting internal thread; 15. Limiting groove; 31. Guide block; 32. Limiting block; 41. Retaining ring; 42. Limiting spring; 51. Arc-shaped strip hole; 52. Sealing groove; 53. Sealing ring; 61. Threaded hole; 71. First connecting ring; 72. Second connecting ring; 73. First locking plate; 74. Second locking plate; 75. Locking pin; 76. Handle; 77. Locking external thread; 78. Locking groove; 79. Locking spring; 771. Receiving groove; 772. Drive shaft. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0033] The embodiment of the present application discloses an overhead hot water insulation pipe for heating.

[0034] Reference Figure 1 and Figure 2 A heating overhead hot water insulation pipe comprises a steel pipe 1, and the steel pipe 1 is fixedly provided with an insulation layer 2 along the axial direction. When installing adjacent insulation pipes, a connecting external thread 11 is provided at one end of the steel pipe 1 along the axial direction, a limiting ring 3 is sleeved at one end of the steel pipe 1 close to the connecting external thread 11, and a first flange 5 is fixed at one end of the steel pipe 1 close to the limiting ring 3. An installation groove 12 is provided along the axial direction at one end of the steel pipe 1 away from the guide block 31, and the limiting ring 3 is inserted into the installation groove 12 of the adjacent steel pipe 1.

[0035] Reference Figure 1 and Figure 2 The steel pipe 1 is provided with a limit assembly 4, which includes a retaining ring 41 and a limit spring 42. The retaining ring 41 is sleeved on the steel pipe 1 and fixedly connected to the steel pipe 1. The limit spring 42 is sleeved on the steel pipe 1. The two connecting ends of the limit spring 42 are respectively fixedly connected to the retaining ring 41 and the limit ring 3. When the steel pipe 1 is pushed by hand to move axially, the retaining ring 41 limits the limit ring 3 through the limit spring 42, so that the limit ring 3 can move with the steel pipe 1.

[0036] Reference Figure 2 and Figure 3 The inner ring of the limit ring 3 is fixed with a plurality of limit blocks 32 along the circumferential direction, and the steel pipe 1 is provided with a plurality of limit grooves 15 corresponding to the limit blocks 32 along the circumferential direction. The limit blocks 32 are respectively located in the corresponding limit grooves 15 and are slidably connected to the steel pipe 1. The limit ring 3 is fixed with a plurality of guide blocks 31 along the circumferential direction; the steel pipe 1 is provided with a plurality of guide grooves 13 connected to the installation grooves 12, and the guide grooves 13 correspond to the guide blocks 31 one by one.

[0037] Reference Figure 2 and Figure 3 When the adjacent steel pipes 1 are connected, the steel pipe 1 is rotated manually, the limiting block 32 is located in the limiting groove 15, and the steel pipe 1 limits the limiting ring 3 through the limiting block 32 and the limiting groove 15, so that the steel pipe 1 can drive the limiting ring 3 to rotate together. When the guide block 31 is aligned with the guide groove 13 of the adjacent steel pipe 1, the probability of the limiting ring 3 rotating can be reduced, and the adjacent steel pipes 1 can be connected more conveniently.

[0038] Reference Figure 3 and Figure 4 , the steel pipe 1 is pushed manually, and the limiting assembly 4 limits the limiting ring 3, so that the steel pipe 1 drives the limiting ring 3 to move along the axial direction of the adjacent steel pipe 1, and the guide block 31 is inserted into the corresponding guide groove 13. A first flange 5 is fixedly provided at one end of the steel pipe 1 close to the limiting ring 3, and the first flange 5 is provided with a mounting assembly 7, which includes a first connecting ring 71 and a second connecting ring 72, and the first connecting ring 71 is hinged with the second connecting ring 72.

[0039] Reference Figure 2 and Figure 3 , the first flange 5 is in conflict with the first connecting ring 71, and the second connecting ring 72 is manually rotated to make the second connecting ring 72 conflict with the first flange 5. The steel pipe 1 is pushed manually until the end of the guide block 31 close to the connecting external thread 11 conflicts with the adjacent steel pipe 1, and the mounting groove 12 is provided with a connecting internal thread 14 adapted to the connecting external thread 11, so that the connecting internal thread 14 corresponds to the connecting external thread 11.

[0040] Reference Figure 2 and Figure 3 , the person continues to push the steel pipe 1, and the adjacent steel pipes 1 cooperate with the retaining ring 41 to squeeze the limit spring 42, causing the limit spring 42 to undergo elastic deformation. The length of the limit groove 15 is less than the maximum deformation of the limit spring 42. As the steel pipe 1 continues to move, the limit block 32 separates from the limit groove 15, avoiding interference between the limit block 32 and the steel pipe 1, and ensuring that the adjacent two steel pipes 1 can be connected normally.

[0041] Reference Figure 3 and Figure 4 After the limit block 32 is separated from the limit groove 15, the steel pipe 1 is rotated manually so that the two steel pipes 1 to be connected are connected through the connecting internal thread 14 and the connecting external thread 11, which is beneficial to ensure the coaxiality between adjacent steel pipes 1 and reduce the probability of deflection of adjacent steel pipes 1.

[0042] Reference Figure 3 and Figure 4 The first connecting ring 71 and the second connecting ring 72 are both provided with a receiving groove 771 . The first connecting ring 71 and the second connecting ring 72 are both rotatably connected with a plurality of transmission shafts 772 . The transmission shafts 772 are evenly distributed in the receiving groove 771 .

[0043] Reference Figure 3 and Figure 4 When the insulation pipe is installed, the first flange 5 conflicts with the transmission shaft 772. When the steel pipe 1 is rotated, the transmission shaft 772 can convert the sliding friction into rolling friction, which can reduce the resistance of the steel pipe 1 to rotation and make it more convenient to rotate the steel pipe 1.

[0044] Reference Figure 3 and Figure 4 The end of the steel pipe 1 away from the limiting ring 3 is fixed with a second flange 6, the end of the first flange 5 away from the limiting ring 3 is provided with a sealing groove 52, and the first flange 5 is fixed with a sealing ring 53, and the sealing ring 53 is arranged in the sealing groove 52. When the first flange 5 and the second flange 6 are in close contact, the first flange 5 and the second flange 6 cooperate to squeeze the sealing ring 53, so that the sealing ring 53 is deformed to fill the gap between the first flange 5 and the second flange 6, so as to achieve the effect of sealing the connection between the adjacent steel pipes 1.

[0045] Reference Figure 1 and Figure 2 The first flange 5 is provided with a plurality of arc-shaped strip holes 51 along the axial direction, and the second flange 6 is provided with a plurality of threaded holes 61 along the axial direction, and the threaded holes 61 correspond to the arc-shaped strip holes 51 one by one. When adjacent steel pipes 1 are connected by connecting external threads 11 and connecting internal threads 14, the distance between the first flange 5 and the second flange 6 of the adjacent steel pipe 1 gradually decreases until the first flange 5 and the second flange 6 collide with each other. The rotation of the steel pipe 1 will change the relative position of the first flange 5 and the second flange 6. The arc-shaped strip holes 51 can reduce the probability of the first flange 5 blocking the threaded holes 61, and ensure that the first flange 5 and the second flange 6 can be locked by bolts.

[0046] Reference Figure 3 and Figure 4 The mounting assembly 7 also includes a first locking plate 73, a second locking plate 74, a locking pin 75 and a handle 76. The first locking plate 73 is fixedly connected to the first connecting ring 71, the second locking plate 74 is fixedly connected to the second connecting ring 72 and corresponds to the first locking plate 73, the locking pin 75 is rotatably connected to the first locking plate 73, and the locking pin 75 is rotated toward the square close to the second locking plate 74 by hand.

[0047] Reference Figure 3 and Figure 4The second locking plate 74 is provided with a locking groove 78 corresponding to the locking pin 75, so that the locking pin 75 enters the locking groove 78, and the locking pin 75 is provided with a locking external thread 77 at one end away from the first locking plate 73, and the handle 76 is threadedly connected with the locking pin 75 through the locking external thread 77. The handle 76 is manually rotated around the axis of the locking pin 75 to move the handle 76 toward the second locking plate 74, and the handle 76 is tightly in contact with the second locking plate 74. The installer does not need to carry installation tools such as wrenches and bolts when installing at high altitude, and it is more convenient to install the thermal insulation pipe.

[0048] Reference Figure 3 and Figure 4 The locking pin 75 is sleeved with a locking spring 79, and the two ends of the locking spring 79 along the length direction respectively contact the first locking plate 73 and the handle 76. When the handle 76 moves toward the second locking plate 74, the handle 76 cooperates with the first locking plate 73 to squeeze the locking spring 79, so that the locking spring 79 undergoes elastic deformation. The reaction force of the locking spring 79 can reduce the probability of the handle 76 loosening, and can ensure the stability of the connection between the mounting assembly 7 and the first flange 5.

[0049] The implementation principle of an overhead hot water insulated pipe for heating according to an embodiment of the present application is as follows: when installing adjacent insulated pipes, insert the limit ring 3 into the installation groove 12 of the adjacent steel pipe 1. When the steel pipe 1 is pushed axially by hand, the retaining ring 41 limits the limit ring 3 through the limit spring 42, so that the limit ring 3 can move with the steel pipe 1. The steel pipe 1 is pushed by hand, and the limit assembly 4 limits the limit ring 3, so that the steel pipe 1 drives the limit ring 3 to move axially along the adjacent steel pipe 1, and inserts the guide block 31 into the corresponding guide groove 13. The steel pipe 1 is continuously pushed by hand, and the end of the guide block 31 close to the connecting external thread 11 conflicts with the adjacent steel pipe 1, so that the connecting internal thread 14 corresponds to the connecting external thread 11.

[0050] The person continues to push the steel pipe 1 by hand, and the adjacent steel pipes 1 cooperate with the retaining ring 41 to squeeze the limit spring 42, causing the limit spring 42 to undergo elastic deformation. The length of the limit groove 15 is less than the maximum deformation of the limit spring 42. As the steel pipe 1 continues to move, the limit block 32 separates from the limit groove 15, avoiding interference between the limit block 32 and the steel pipe 1, thereby ensuring that the two adjacent steel pipes 1 can be connected normally. After the limit block 32 separates from the limit groove 15, the person rotates the steel pipe 1 by hand, so that the two steel pipes 1 to be connected are connected through the connecting internal thread 14 and the connecting external thread 11, which is conducive to ensuring the coaxiality between the adjacent steel pipes 1 and reducing the probability of the adjacent steel pipes 1 being deflected.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heating overhead hot water insulation pipe, comprising a steel pipe (1), characterized in that: The steel pipe (1) is fixedly provided with an insulation layer (2) along the circumferential direction; a connecting external thread (11) is provided at one end of the steel pipe (1) along the axial direction; a limiting ring (3) is sleeved on one end of the steel pipe (1) close to the connecting external thread (11); a plurality of guide blocks (31) are fixedly provided on the limiting ring (3) along the circumferential direction; a mounting groove (12) is provided along the axial direction at one end of the steel pipe (1) away from the guide block (31); a plurality of guide grooves (13) connected to the mounting groove (12) are provided on the steel pipe (1), and the guide grooves (13) correspond to the guide blocks (31) one by one; a limiting assembly (4) for limiting the limiting ring (3) is provided on the steel pipe (1); a connecting internal thread (14) matching the connecting external thread (11) is provided in the mounting groove (12).

2. The overhead hot water insulation pipe for heating according to claim 1, characterized in that: The limiting assembly (4) comprises a retaining ring (41) and a limiting spring (42); the retaining ring (41) is sleeved on the steel pipe (1) and fixedly connected to the steel pipe (1); the limiting spring (42) is sleeved on the steel pipe (1); and two connecting ends of the limiting spring (42) are fixedly connected to the retaining ring (41) and the limiting ring (3), respectively.

3. The overhead hot water insulation pipe for heating according to claim 1, characterized in that: The inner ring of the limit ring (3) is fixedly provided with a plurality of limit blocks (32) along the circumferential direction, and the steel pipe (1) is provided with a plurality of limit grooves (15) corresponding to the limit blocks (32) along the circumferential direction. The limit blocks (32) are respectively located in the corresponding limit grooves (15) and are slidably connected to the steel pipe (1).

4. The overhead hot water insulation pipe for heating according to claim 1, characterized in that: A first flange (5) is fixedly provided at one end of the steel pipe (1) close to the limiting ring (3), and a plurality of arc-shaped strip holes (51) are opened in the axial direction on the first flange (5); a second flange (6) is fixedly provided at one end of the steel pipe (1) away from the limiting ring (3), and a plurality of threaded holes (61) are opened in the axial direction on the second flange (6), and the threaded holes (61) correspond to the arc-shaped strip holes (51) one by one.

5. The overhead hot water insulation pipe for heating according to claim 4, characterized in that: A sealing groove (52) is provided at one end of the first flange (5) away from the limiting ring (3), and a sealing ring (53) is fixedly provided on the first flange (5), and the sealing ring (53) is arranged in the sealing groove (52).

6. The overhead hot water insulation pipe for heating according to claim 4, characterized in that: The first flange (5) is provided with a mounting assembly (7), which comprises a first connecting ring (71), a second connecting ring (72), a first locking plate (73), a second locking plate (74), a locking pin (75) and a handle (76). The first connecting ring (71) is hinged with the second connecting ring (72), the first locking plate (73) is fixedly connected with the first connecting ring (71), the second locking plate (74) is fixedly connected with the second connecting ring (72) and corresponds to the first locking plate (73), the locking pin (75) is rotatably connected with the first locking plate (73), a locking external thread (77) is provided at one end of the locking pin (75) away from the first locking plate (73), the second locking plate (74) is provided with a locking groove (78) corresponding to the locking pin (75), and the handle (76) is threadedly connected with the locking pin (75) via the locking external thread (77).

7. The overhead hot water insulation pipe for heating according to claim 6, characterized in that: The first connecting ring (71) and the second connecting ring (72) are both provided with a receiving groove (771), and the first connecting ring (71) and the second connecting ring (72) are both rotatably connected to a plurality of transmission shafts (772) along the circumferential direction, and the transmission shafts (772) are evenly distributed in the receiving groove (771).

8. The overhead hot water insulation pipe for heating according to claim 6, characterized in that: The locking pin (75) is sleeved with a locking spring (79), and the two ends of the locking spring (79) along the length direction are respectively in conflict with the first locking plate (73) and the handle (76).

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