A direct buried polyurethane insulation pipe

Abstract

The present invention discloses a direct-buried polyurethane thermal insulation pipe, and relates to the technical field of thermal insulation pipes. The direct-buried polyurethane thermal insulation pipe comprises a thermal insulation pipe body buried in a groove, the side wall of each thermal insulation pipe body is sleeved with two groups of symmetrically arranged semicircular rings, and the number of each group of semicircular rings is two, the two semicircular rings are detachably connected by a first connecting mechanism, and the bottom of each group of semicircular rings is detachably connected with a base by a second connecting mechanism. The direct-buried polyurethane thermal insulation pipe is convenient for connecting two thermal insulation pipe bodies, and at the same time, it can ensure that the two thermal insulation pipe bodies are in a concentric state, and it is convenient to adjust the height of the two ends of the thermal insulation pipe body to ensure that it is in a horizontal state, so as to facilitate subsequent welding operations and ensure the quality of welding; when connecting, there is no need to turn the direction of the thermal insulation pipe body, so that the connection of the thermal insulation pipe body is more convenient and quick, and the efficiency of subsequent construction can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation pipes, in particular to a directly buried polyurethane thermal insulation pipe. Background Art

[0002] Direct buried polyurethane insulated pipe is a kind of pipeline insulation material. It consists of three parts: steel pipe, polyurethane foam layer and outer sheath. It is mainly used for underground pipelines for conveying fluid media. It is widely used in heating, refrigeration, petrochemical, fertilizer, food, pharmaceutical and other industries. The polyurethane foam layer is the main insulation material with good thermal insulation and corrosion resistance. It can effectively reduce pipeline heat loss and prevent condensation. Compared with ordinary steel pipes, polyurethane insulated steel pipes have advantages in thermal insulation performance, corrosion resistance and service life, so they have been widely used.

[0003] When existing direct-buried polyurethane insulated pipes are used, welding is usually required during the connection process after they are buried in the groove. However, during welding, it is not convenient to ensure that two adjacent sections of direct-buried polyurethane insulated pipes are in a concentric state, and it is not convenient to ensure that two adjacent sections of direct-buried polyurethane insulated pipes are in a horizontal position, which affects the efficiency and quality of welding. Summary of the invention

[0004] The purpose of the present invention is to provide a direct-buried polyurethane thermal insulation pipe to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a direct-buried polyurethane thermal insulation pipe, comprising a thermal insulation pipe body buried in a groove, the side wall sleeve of each of the thermal insulation pipe bodies is provided with two groups of symmetrically arranged semicircular rings, and the number of each group of semicircular rings is two, the two semicircular rings are detachably connected by a first connecting mechanism, and the bottom of each group of semicircular rings is detachably connected to a base by a second connecting mechanism, two symmetrically arranged first moving blocks are connected to the two sides of each base by a lifting mechanism, and the bottom of each first moving block is rotatably connected to a roller by a rotating mechanism, the side wall of each base is rotatably connected to a rotating disk, and the side wall of the rotating disk is fixedly connected to a connecting rod and a connecting pipe, the other end of the connecting pipe is fixedly connected to a conical sleeve, and the side wall of the connecting pipe is provided with a first limiting mechanism for limiting the connecting rod, the side wall of the base is provided with a second limiting mechanism for limiting the rotating disk, and the top of each group of semicircular rings is provided with a horizontal detection mechanism for detecting the horizontality.

[0006] Preferably, the first limiting mechanism includes a plurality of annular grooves arranged in an array on the side wall of the connecting rod, and a strip opening is provided on the side wall of the connecting tube, a limiting block is inserted in the strip opening, and the limiting block includes an inclined surface and a limiting surface, a push rod is fixedly connected to the top of the limiting block, and a first reset mechanism is provided between the limiting block and the connecting tube.

[0007] Preferably, the second limiting mechanism includes two symmetrically arranged limiting holes opened on the side wall of the rotating disk, and the side wall of the base is connected to the second movable block through the second reset mechanism, the side wall of the second movable block is fixedly connected to the limiting rod, and the limiting rod is inserted in the limiting hole.

[0008] Preferably, the first resetting mechanism includes an L-shaped plate fixedly connected to the side wall of the connecting tube, and two symmetrically arranged first T-shaped guide rods are inserted into the side wall of the L-shaped plate, one end of the first T-shaped guide rod is fixed to the side wall of the limit block, and the side wall of each first T-shaped guide rod is sleeved with a first spring.

[0009] Preferably, the second reset mechanism includes two symmetrically arranged fixed blocks fixedly connected to the side walls of the base, and a second T-shaped guide rod is inserted into the side wall of each fixed block, one end of the second T-shaped guide rod is fixed to the side wall of the second movable block, and a second spring is sleeved on the side wall of each second T-shaped guide rod.

[0010] Preferably, the lifting mechanism includes two symmetrically arranged support blocks fixedly connected to the side walls of the base, and the bottom of one of the support blocks is fixedly connected to a fixed rod, the side wall of the fixed rod is sleeved with a moving tube, and the lower end of the moving tube is fixed to the top of the first moving block, the bottom of the other support block is rotatably connected to a threaded rod, and the side wall of the threaded rod is threadedly connected to a threaded tube, the lower end of the threaded tube is fixed to the top of the first moving block, and the upper end of the threaded rod is fixedly connected to a rocker.

[0011] Preferably, the rotating mechanism comprises two symmetrically arranged connecting blocks fixedly connected to the bottom of the first moving block, and the roller is rotatably connected to the side walls of the connecting blocks via a rotating shaft.

[0012] Preferably, the first connecting mechanism includes a first connecting plate fixedly connected to the top of each semicircular ring, and the two first connecting plates are detachably connected via a first bolt.

[0013] Preferably, the second connecting mechanism includes a second connecting plate fixedly connected to the side wall of the base, a third connecting plate is fixedly connected to the bottom of the semicircular ring, and the third connecting plate is detachably connected to the second connecting plate via a second bolt.

[0014] Preferably, the level detection mechanism comprises a mounting block fixedly connected to the top of each semicircular ring, and a level bubble is fixedly connected to the top of the mounting block.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This type of direct-buried polyurethane thermal insulation pipe, by setting a first limiting mechanism, etc., when it is necessary to connect the two thermal insulation pipe bodies, the connecting rod is inserted into the connecting pipe along the conical sleeve. When the end of the connecting rod abuts against the inclined surface, it can push the limiting block to move in the direction close to the L-shaped plate. At the same time, the first spring is compressed, so that the limiting block can slide on the side wall of the connecting rod. When the ends of the two semicircular rings abut against each other, the limiting block can be inserted into the annular groove under the action of the first spring, and the limiting surface abuts against the side wall of the annular groove for limiting, thereby facilitating the connection of the two thermal insulation pipe bodies and ensuring that the two thermal insulation pipe bodies are in a concentric state, thereby facilitating subsequent welding operations and ensuring the quality of welding; by setting a lifting mechanism, etc., after the two thermal insulation pipe bodies are connected, the thermal insulation pipe bodies are hoisted into the groove and the roller is in contact with the bottom of the groove, and the horizontal bubble is observed for adjustment. When adjusting, the rocker is turned, and the rotation of the rocker drives the rotation of the threaded rod, thereby The threaded pipe and the movable pipe are driven to move downward, and then the first movable block and the roller are driven to move downward. At this time, the height of the two ends of the insulation pipe body can be adjusted to ensure that it is in a horizontal state, thereby facilitating subsequent welding operations and ensuring the quality of welding; by setting a second limiting mechanism, when the two insulation pipe bodies are connected, when the connecting rods and the connecting pipes of the two adjacent insulation pipe bodies are not on the same side, the second movable block is pulled to move in the direction close to the fixed block, so that the limiting rod is withdrawn from the limiting hole, and at the same time, the second spring is compressed, and then the second movable block is released. At this time, under the action of the second spring, the limiting rod is abutted against the side wall of the rotating disk, and then the rotating disk is rotated 180 degrees. When the limiting rod is aligned with the other limiting hole, under the action of the second spring, the limiting rod is inserted into the limiting hole, and the rotating disk can be limited, so that the insulation pipe body does not need to be turned around, making the connection of the insulation pipe body more convenient and quick, and can improve the efficiency of subsequent construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the use state of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the overall structure of the present invention from another perspective;

[0020] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 5 for Figure 3A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at D in the middle;

[0024] Figure 8 for Figure 5 Schematic diagram of the enlarged structure at E in the middle.

[0025] In the figure: 1, groove; 2, first limiting mechanism; 201, annular groove; 202, strip opening; 203, limiting block; 204, inclined surface; 205, limiting surface; 206, pushing rod; 3, second limiting mechanism; 301, limiting hole; 302, second moving block; 303, limiting rod; 4, first reset mechanism; 401, L-shaped plate; 402, first T-shaped guide rod; 403, first spring; 5, second reset mechanism; 501, fixed block; 502, second T-shaped guide rod; 503, second spring; 6, lifting mechanism; 601, support block; 602, fixed rod; 603, moving tube; 604, lifting mechanism; 605, lifting mechanism; 606, lifting mechanism; 607, lifting mechanism; 608, lifting mechanism; 609, lifting mechanism; 610, lifting mechanism; 611, lifting mechanism; 612, lifting mechanism; 613, lifting mechanism; 614, lifting mechanism; 615, lifting mechanism; 616, lifting mechanism; 617, lifting mechanism; 618, lifting mechanism; 619, lifting mechanism; 620, lifting mechanism; 621, lifting mechanism; 622, lifting mechanism; 623, lifting mechanism; 624, lifting mechanism; 625, lifting mechanism; 626, lifting mechanism; 627, lifting mechanism; 628, lifting mechanism; 629, lifting mechanism; 630, lifting mechanism; 631, lifting mechanism; 632, lifting mechanism; 633, lifting mechanism; 634, lifting mechanism; 635, lifting mechanism; 636, lifting mechanism; 637, lifting mechanism; 638, lifting mechanism; 639, lifting mechanism; 640, lifting mechanism; 641, lifting mechanism; 642, lifting mechanism 04. Threaded pipe; 605. Threaded rod; 606. Rocker; 7. Rotating mechanism; 701. Connecting block; 702. Rotating shaft; 8. Level detection mechanism; 801. Mounting block; 802. Level bubble; 11. Insulation pipe body; 12. Semicircular ring; 13. First connecting mechanism; 1301. First connecting plate; 1302. First bolt; 14. Second connecting mechanism; 1401. Second connecting plate; 1402. Second bolt; 1403. Third connecting plate; 15. Base; 16. Rotating disk; 17. Connecting rod; 18. Connecting pipe; 19. Conical sleeve; 20. First moving block; 21. Roller. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-Figure 8The present invention provides a technical solution: a directly buried polyurethane thermal insulation pipe, comprising a thermal insulation pipe body 11 buried in a groove 1, the side wall of each thermal insulation pipe body 11 is sleeved with two groups of symmetrically arranged semicircular rings 12, and the number of each group of semicircular rings 12 is two, the two semicircular rings 12 are detachably connected by a first connecting mechanism 13, and the bottom of each group of semicircular rings 12 is detachably connected to a base 15 by a second connecting mechanism 14, the two sides of each base 15 are connected to two symmetrically arranged first moving blocks 20 by a lifting mechanism 6, and the bottom of each first moving block 20 is rotatably connected to a roller 21 by a rotating mechanism 7, the side wall of each base 15 is rotatably connected to a rotating disk 16, and the side wall of the rotating disk 16 is fixedly connected to a connecting rod 17 and a connecting pipe 18, and the connecting pipe 18 The other end is fixedly connected with a conical sleeve 19, and the side wall of the connecting pipe 18 is provided with a first limiting mechanism 2 for limiting the connecting rod 17, the side wall of the base 15 is provided with a second limiting mechanism 3 for limiting the rotating disk 16, and the top of each group of semicircular rings 12 is provided with a horizontal detection mechanism 8 for detecting the horizontality, which is convenient for connecting the two insulation pipe bodies 11. At the same time, it can ensure that the two insulation pipe bodies 11 are in a concentric state, and it is convenient to adjust the height of the two ends of the insulation pipe body 11 to ensure that it is in a horizontal state, thereby facilitating subsequent welding operations and ensuring the quality of welding; when connecting, there is no need to turn the direction of the insulation pipe body 11, which makes the connection of the insulation pipe body 11 more convenient and quick, and can improve the efficiency of subsequent construction.

[0028] See also Figure 6 and Figure 7 The first limiting mechanism 2 includes a plurality of annular grooves 201 arranged in an array on the side wall of the connecting rod 17, and a strip opening 202 is provided on the side wall of the connecting pipe 18, a limiting block 203 is inserted in the strip opening 202, and the limiting block 203 includes an inclined surface 204 and a limiting surface 205, a push rod 206 is fixedly connected to the top of the limiting block 203, and a first reset mechanism 4 is provided between the limiting block 203 and the connecting pipe 18. When it is necessary to connect the two insulation pipe bodies 11, the connecting rod 17 is inserted into the connecting pipe 18 along the conical sleeve 19, and when the end of the connecting rod 17 When it abuts against the inclined surface 204, it can push the limit block 203 to move towards the direction close to the L-shaped plate 401, so that the limit block 203 can slide on the side wall of the connecting rod 17. When the ends of the two semicircular rings 12 abut against each other, the limit block 203 can be inserted into the annular groove 201 under the action of the first reset mechanism 4, and the limit surface 205 abuts against the side wall of the annular groove 201 for limiting, thereby facilitating the connection of the two insulation pipe bodies 11, and can ensure that the two insulation pipe bodies 11 are in a concentric state, thereby facilitating subsequent welding operations and ensuring the quality of welding.

[0029] See also Figure 7The second limiting mechanism 3 includes two symmetrically arranged limiting holes 301 opened on the side wall of the rotating disk 16, and the side wall of the base 15 is connected to the second moving block 302 through the second reset mechanism 5, and the side wall of the second moving block 302 is fixedly connected to the limiting rod 303, and the limiting rod 303 is inserted into the limiting hole 301. When the two insulation pipe bodies 11 are connected, when the connecting rods 17 and the connecting pipes 18 of the two adjacent insulation pipe bodies 11 are not on the same side, the second moving block 302 is pulled to move in the direction close to the fixed block 501, so that the limiting rod 303 moves from the limiting hole 301 to the fixed block 501. 301, then, release the second moving block 302, at this time, under the action of the second reset mechanism 5, the limiting rod 303 is abutted against the side wall of the rotating disk 16, and then, the rotating disk 16 is rotated one hundred and eighty degrees. When the limiting rod 303 is aligned with another limiting hole 301, under the action of the second reset mechanism 5, the limiting rod 303 is inserted into the limiting hole 301, which can limit the rotating disk 16, thereby eliminating the need to turn the direction of the insulation pipe body 11, making the connection of the insulation pipe body 11 more convenient and quick, and improving the efficiency of subsequent construction.

[0030] See also Figure 7 The first reset mechanism 4 includes an L-shaped plate 401 fixedly connected to the side wall of the connecting tube 18, and two symmetrically arranged first T-shaped guide rods 402 are inserted into the side wall of the L-shaped plate 401, one end of the first T-shaped guide rod 402 is fixed to the side wall of the limit block 203, and the side wall of each first T-shaped guide rod 402 is sleeved with a first spring 403, which guides and resets the movement of the limit block 203.

[0031] See also Figure 7 The second reset mechanism 5 includes two symmetrically arranged fixed blocks 501 fixedly connected to the side wall of the base 15, and a second T-shaped guide rod 502 is inserted into the side wall of each fixed block 501, one end of the second T-shaped guide rod 502 is fixed to the side wall of the second movable block 302, and a second spring 503 is sleeved on the side wall of each second T-shaped guide rod 502, which guides and resets the movement of the second movable block 302.

[0032] See also Figure 6The lifting mechanism 6 includes two symmetrically arranged support blocks 601 fixedly connected to the side walls of the base 15, and the bottom of one of the support blocks 601 is fixedly connected to a fixed rod 602, the side wall of the fixed rod 602 is sleeved with a moving tube 603, and the lower end of the moving tube 603 is fixed to the top of the first moving block 20, and the bottom of the other support block 601 is rotatably connected to a threaded rod 605, and the side wall of the threaded rod 605 is threadedly connected to a threaded tube 604, the lower end of the threaded tube 604 is fixed to the top of the first moving block 20, and the upper end of the threaded rod 605 is fixed to the upper end of the threaded rod 605. A rocker 606 is fixedly connected to the end. After the two insulation pipe bodies 11 are connected, the insulation pipe body 11 is hoisted into the groove 1 and the roller 21 is in contact with the bottom of the groove 1. The rocker 606 is turned. The rotation of the rocker 606 drives the threaded rod 605 to rotate, thereby driving the threaded pipe 604 and the movable pipe 603 to move downward, and then driving the first movable block 20 and the roller 21 to move downward. At this time, the height of the two ends of the insulation pipe body 11 can be adjusted to ensure that it is in a horizontal state, which is convenient for subsequent welding operations and ensures the quality of welding.

[0033] See also Figure 6 The rotating mechanism 7 includes two symmetrically arranged connecting blocks 701 fixedly connected to the bottom of the first moving block 20, and the roller 21 is rotatably connected to the side wall of the connecting block 701 through a rotating shaft 702 to ensure the normal rotation of the roller 21.

[0034] See also Figure 4 The first connecting mechanism 13 includes a first connecting plate 1301 fixedly connected to the top of each semicircular ring 12, and the two first connecting plates 1301 are detachably connected by a first bolt 1302, so as to facilitate the installation and removal of the two semicircular rings 12.

[0035] See also Figure 4 The second connecting mechanism 14 includes a second connecting plate 1401 fixedly connected to the side wall of the base 15, and a third connecting plate 1403 is fixedly connected to the bottom of the semicircular ring 12, and the third connecting plate 1403 and the second connecting plate 1401 are detachably connected by a second bolt 1402, which facilitates the installation and disassembly of the semicircular ring 12 and the base 15.

[0036] See also Figure 4 and Figure 5 The level detection mechanism 8 includes a mounting block 801 fixedly connected to the top of each semicircular ring 12, and a level bubble 802 is fixedly connected to the top of the mounting block 801. Adjustment is performed by observing the level bubble 802, which is more convenient and quick to use.

[0037] Working principle: When in use, when it is necessary to connect the two insulation pipe bodies 11, the connecting rod 17 is inserted into the connecting pipe 18 along the tapered sleeve 19. When the end of the connecting rod 17 abuts against the inclined surface 204, the limiting block 203 can be pushed to move in the direction close to the L-shaped plate 401. At the same time, the first spring 403 is compressed, so that the limiting block 203 can slide on the side wall of the connecting rod 17. When the ends of the two semicircular rings 12 abut against each other, the limiting block 203 can be inserted into the annular groove 201 under the action of the first spring 403, and the limiting surface 205 abuts against the side wall of the annular groove 201 for limiting, thereby facilitating the connection of the two insulation pipe bodies 11, and ensuring that the two insulation pipe bodies 11 are in a concentric state, thereby facilitating subsequent welding operations and ensuring the quality of welding.

[0038] After the two insulation pipe bodies 11 are connected, the insulation pipe body 11 is hoisted into the groove 1 and the roller 21 is in contact with the bottom of the groove 1, and the level bubble 802 is observed for adjustment. When adjusting, the rocker 606 is turned, and the rotation of the rocker 606 drives the rotation of the threaded rod 605, thereby driving the threaded pipe 604 and the moving pipe 603 to move downward, and then driving the first moving block 20 and the roller 21 to move downward. At this time, the height of the two ends of the insulation pipe body 11 can be adjusted to ensure that it is in a horizontal state, thereby facilitating subsequent welding operations and ensuring the quality of welding;

[0039] When the second locking cam 303 is in the process of being moved, the locking cam 303 is released and the locking cam 303 is in the process of being moved.

[0040] After the welding is completed, the first bolt 1302 and the second bolt 1402 are removed, so that the two semicircular rings 12 and the base 15 are removed for subsequent use.

Claims

1. A directly buried polyurethane thermal insulation pipe, comprising a thermal insulation pipe body (11) buried in a groove (1), characterized in that: The side wall of each of the heat-insulating pipe bodies (11) is sleeved with two groups of symmetrically arranged semicircular rings (12), and the number of each group of semicircular rings (12) is two. The two semicircular rings (12) are detachably connected via a first connecting mechanism (13), and the bottom of each group of semicircular rings (12) is detachably connected to a base (15) via a second connecting mechanism (14). Two sides of each of the bases (15) are connected to two symmetrically arranged first moving blocks (20) via a lifting mechanism (6), and the bottom of each first moving block (20) is rotatably connected to a roller (21) via a rotating mechanism (7). The side wall of each base (15) is rotatably connected to a rotating disk (16), and the side wall of the rotating disk (16) is fixedly connected to a connecting rod (17) and a connecting tube (18), the other end of the connecting tube (18) is fixedly connected to a conical sleeve (19), and the side wall of the connecting tube (18) is provided with a first limiting mechanism (2) for limiting the connecting rod (17), the side wall of the base (15) is provided with a second limiting mechanism (3) for limiting the rotating disk (16), and the top of each group of semicircular rings (12) is provided with a level detection mechanism (8) for detecting the level; The first limiting mechanism (2) comprises a plurality of annular grooves (201) arranged in an array and opened on the side wall of the connecting rod (17), and a strip-shaped opening (202) is opened on the side wall of the connecting tube (18), a limiting block (203) is inserted into the strip-shaped opening (202), and the limiting block (203) comprises an inclined surface (204) and a limiting surface (205), a push rod (206) is fixedly connected to the top of the limiting block (203), and a first reset mechanism (4) is arranged between the limiting block (203) and the connecting tube (18), and the second limiting mechanism (3) comprises a plurality of annular grooves (201) arranged on the side wall of the connecting rod (17), and a strip-shaped opening (202) is opened on the side wall of the connecting tube (18), a limiting block (203) is inserted into the strip-shaped opening (202), and the limiting block (203) comprises an inclined surface (204) and a limiting surface (205), a push rod (206) is fixedly connected to the top of the limiting block (203), and a first reset mechanism (4) is arranged between the limiting block (203) and the connecting tube (18), and the second limiting mechanism (3) comprises a The first resetting mechanism (4) comprises an L-shaped plate (401) fixedly connected to the side wall of the connecting tube (18), and two symmetrically arranged first T-shaped guide rods (402) are inserted into the side wall of the L-shaped plate (401), and one end of the first T-shaped guide rod (402) is connected to the side wall of the limiting block (203). The second resetting mechanism (5) comprises two symmetrically arranged fixed blocks (501) fixedly connected to the side wall of the base (15), and a second T-shaped guide rod (502) is inserted into the side wall of each fixed block (501), one end of the second T-shaped guide rod (502) is fixed to the side wall of the second movable block (302), and a second spring (503) is sleeved on the side wall of each second T-shaped guide rod (502), and the lifting mechanism (6) comprises two symmetrically arranged fixed blocks (501) fixedly connected to the side wall of the base (15). A support block (601), wherein the bottom of one of the support blocks (601) is fixedly connected to a fixed rod (602), the side wall of the fixed rod (602) is sleeved with a moving tube (603), and the lower end of the moving tube (603) is fixed to the top of the first moving block (20); the bottom of the other support block (601) is rotatably connected to a threaded rod (605), and the side wall of the threaded rod (605) is threadedly connected to a threaded tube (604), the lower end of the threaded tube (604) is fixed to the top of the first moving block (20), and the upper end of the threaded rod (605) is fixedly connected to a rocker (606).

2. A directly buried polyurethane thermal insulation pipe according to claim 1, characterized in that: The rotating mechanism (7) comprises two symmetrically arranged connecting blocks (701) fixedly connected to the bottom of the first moving block (20), and the roller (21) is rotatably connected to the side wall of the connecting block (701) via a rotating shaft (702).

3. A directly buried polyurethane thermal insulation pipe according to claim 1, characterized in that: The first connection mechanism (13) comprises a first connection plate (1301) fixedly connected to the top of each semicircular ring (12), and the two first connection plates (1301) are detachably connected via a first bolt (1302).

4. A directly buried polyurethane thermal insulation pipe according to claim 1, characterized in that: The second connection mechanism (14) comprises a second connection plate (1401) fixedly connected to the side wall of the base (15); a third connection plate (1403) is fixedly connected to the bottom of the semicircular ring (12); and the third connection plate (1403) is detachably connected to the second connection plate (1401) via a second bolt (1402).

5. The direct buried polyurethane thermal insulation pipe according to claim 1, characterized in that: The level detection mechanism (8) comprises a mounting block (801) fixedly connected to the top of each semicircular ring (12), and a level bubble (802) is fixedly connected to the top of the mounting block (801).

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