Prefabricated directly-buried steam thermal insulation pipe and production device thereof

Abstract

The invention discloses a prefabricated directly-buried steam thermal insulation pipe and a production device thereof.The prefabricated directly-buried steam thermal insulation pipe comprises a protective layer, an outer steel pipe and an outer supporting ring, the outer steel pipe is arranged in the protective layer, a guide strip is slidably connected to the interior of the outer steel pipe, the outer supporting ring is connected to one side of the guide strip, and a supporting rod is connected to the interior of the outer supporting ring; one end of the supporting rod is connected with an inner supporting ring, an inner steel pipe is arranged in the inner supporting ring, a sealing cover is embedded in one end of the outer steel pipe, and a fixing bolt is arranged on the sealing cover. The outer supporting ring and the inner supporting ring are pushed into the position between the inner steel pipe and the outer steel pipe, the pipeline strength is improved for the inner steel pipe and the outer steel pipe, the positions of the outer supporting ring and the inner supporting ring in the pipeline can be adjusted according to the length of the pipeline, welding is avoided, and the convenience of pipeline construction is improved.

Description

Technical Field

[0001] The invention relates to the field related to steam insulation pipes, and in particular to a prefabricated direct-buried steam insulation pipe and a production device thereof. Background Art

[0002] Steam pipe insulation plays a vital role in industrial production. The steam pipe system is a core component in many factories and facilities, responsible for transporting high-temperature and high-pressure steam, supplying energy and driving various mechanical equipment. Insulated steam pipes can effectively reduce the risk of scalding and fire accidents. If high-temperature steam is not insulated during transportation, it is easy to cause the surface temperature of the pipe to be too high. Once people touch it by mistake or the surrounding environment conditions are poor, it may cause scalding or fire. Through reasonable insulation measures, the surface temperature of the pipe can be effectively reduced, safety hazards can be reduced, and the safety of personnel and equipment can be guaranteed.

[0003] The existing devices will encounter the following problems when in use: after direct burial, the pipeline is subjected to soil pressure and ground dynamic loads, and needs to be equipped with sufficient supports. However, the supports usually need to be welded to the inside of the pipeline, which makes processing difficult, and the placement of the supports cannot be adjusted according to the length of the pipeline, which increases the cost investment. Secondly, both ends of the pipeline filled with insulation material are exposed to the outside before construction, and are easily corroded by the environment, which reduces the insulation effect. Summary of the invention

[0004] The object of the present invention is to provide a prefabricated direct-buried steam insulation pipe and a production device thereof 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 prefabricated direct-buried steam insulation pipe, comprising a protective layer, an outer steel pipe, and an outer supporting ring, the outer steel pipe is arranged inside the protective layer, the inner part of the outer steel pipe is slidably connected with a guide strip, one side of the guide strip is connected to the outer supporting ring, the outer supporting ring is connected to a supporting rod, one end of the supporting rod is connected to the inner supporting ring, the inner steel pipe is arranged inside the inner supporting ring, the guide block on the inner supporting ring is aligned with the guide groove, and the guide strip on the outer supporting ring is aligned with the groove on the outer steel pipe, so that the outer supporting ring and the inner supporting ring are pushed into between the inner steel pipe and the outer steel pipe, so as to increase the pipeline strength for the inner steel pipe and the outer steel pipe, and the positions of the outer supporting ring and the inner supporting ring inside the pipeline can be adjusted according to the length of the pipeline, so as to avoid welding and increase the convenience of pipeline construction, and a sealing cover is embedded at one end of the outer steel pipe, and a fixing bolt is arranged on the sealing cover, and the sealing cover is inserted into one end of the pipeline to protect the internal polyurethane foam.

[0006] In a further embodiment, guide blocks are evenly arranged on the inner surface of the inner support ring, guide grooves are arranged on the outer side of the inner steel pipe, and the guide blocks are slidably connected to the guide grooves to facilitate the connection between the inner support ring and the inner steel pipe.

[0007] In a further embodiment, a sealing ring is provided inside the cover, and the fixing bolt passes through the sealing ring, so that the fixing bolt fixes the sealing ring to prevent the sealing ring from being deformed and displaced, thereby reducing the sealing performance.

[0008] In a further embodiment, a heat-insulating layer is provided between the outer steel pipe and the inner steel pipe, and the heat-insulating layer is filled with polyurethane foam.

[0009] In a further embodiment, a connecting hole is provided on the outer side of the outer support ring, and the fixing bolt is connected to the outer support ring through the connecting hole, so as to avoid displacement of the outer support ring at the port and reduce the use effect.

[0010] In a further embodiment, a through hole is provided inside the cover, and a sealing gasket is provided inside the through hole to prevent the polyurethane foam inside from being corroded.

[0011] A production device for prefabricated direct-buried steam insulation pipes, comprising a device base, a placement plate, an auxiliary platform, a bracket, an arc frame and a cutting knife structure, wherein ramp platforms are respectively installed at both ends of the device base, and auxiliary rollers are rotatably installed on the ramp platforms. A bracket is installed on the device base, and a limit rod is installed on the bracket. An arc frame is placed in the bracket, and a circular track is opened on the outer wall of the arc frame. One end of the limit rod is slidably connected to the circular track. A telescopic rod is installed on the inner ring wall of the arc frame, and a cutting knife structure is installed on one end of the telescopic rod. A gear ring is arranged on the outer wall of the arc frame, and a motor A is installed on the device base. A power gear roller is installed on the power shaft end of the motor A, and the power gear roller is meshed with the gear ring.

[0012] By adopting the above technical scheme, the ramp platforms installed at both ends of the device base cooperate with the auxiliary rollers rotatably installed on the ramp platforms, so that the insulation pipe is moved to the device base through the ramp platforms, and the insulation pipe is placed on the placement plate to cooperate with the auxiliary platform, and the limiting rods installed on the bracket are slidably connected with the circular track provided on the outer wall of the arc frame, so that the insulation pipe passes through the arc frame, and then the two ends of the insulation pipe are clamped and fixed, and the telescopic rod installed on the inner ring wall of the arc frame is extended by starting, so that the cutting knife structure installed at one end of the telescopic rod is driven to move toward the insulation pipe, and the cutting knife structure is started to cut the insulation pipe at the same time, and the motor A installed on the device base is started to drive the power gear roller installed on the power shaft end of the motor A to rotate, because the power gear roller is engaged with the gear ring provided on the outer wall of the arc frame, so that the arc frame is rotated, and the cutting knife structure is driven to rotate, and the cutting operation of the entire insulation pipe is completed. After the cutting is completed, the insulation pipe is unloaded through the ramp platform, which improves the accuracy of the insulation pipe production and cutting, facilitates the loading and unloading of the staff, reduces the workload of the staff, and improves the production efficiency of the insulation pipe.

[0013] Preferably, a placement plate is installed on the table top of the base of the device, a motor B is installed in the placement plate, a gear is installed on the power shaft end of the motor B, the gear is meshed with a toothed plate installed in the placement plate, and a clamping fixing plate is installed on the toothed plate.

[0014] By adopting the above technical solution, the placement plate installed on the base table of the device is used to start the forward and reverse rotation of the motor B installed in the placement plate, so that the gear installed on the power shaft end of the motor B rotates forward and reverse, and the matching gear engages with the toothed plate installed in the placement plate, thereby driving the two sets of clamping and fixing plates to move relative to each other, clamping and fixing the insulation pipe, preventing the insulation pipe from moving during the cutting operation, and ensuring the accuracy of the insulation pipe during production and cutting.

[0015] Preferably, a dust collection box is installed on the circular arc frame, and the dust collection box is connected to the dust collection hole opened on the inner ring wall of the circular arc frame.

[0016] By adopting the above technical solution, a dust box is installed on the arc frame, the fan in the dust box is started, and the dust box is connected to the dust hole opened on the inner ring wall of the arc frame. The dust generated when the insulation pipe is cut is sucked into the dust box through the dust hole, and the dust is collected by the filter net in the dust box to prevent the dust from floating in the air to pollute the environment and affect the health of the workers.

[0017] Preferably, an auxiliary table is installed on the table top of the device base, and an auxiliary roller is rotatably installed on the auxiliary table.

[0018] By adopting the above technical solution, the auxiliary table installed on the table top of the device base cooperates with the auxiliary rollers rotatably installed on the auxiliary table to facilitate the movement of the insulation pipe through the arc frame.

[0019] Preferably, the cutting blade structure includes a blade support, a blade motor and a cutting blade.

[0020] By adopting the above technical solution, the cutting blade structure includes a blade bracket, a blade motor and a cutting blade. The blade motor on the blade bracket is started, and the blade motor drives the cutting blade to rotate to cut the insulation pipe.

[0021] Preferably, the top surfaces of the placement plate and the auxiliary table are on the same horizontal plane.

[0022] By adopting the above technical solution, the top surfaces of the placement plate and the auxiliary table are on the same horizontal plane, ensuring that the insulation pipes are at the same horizontal height.

[0023] Compared with the prior art, the present invention has the following beneficial effects: Push the outer support ring and the inner support ring between the inner steel pipe and the outer steel pipe to increase the strength of the inner and outer steel pipes. The positions of the outer support ring and the inner support ring inside the pipe can be adjusted according to the length of the pipe to avoid welding and increase the convenience of pipe construction.

[0024] The sealing cap is inserted into one end of the pipe, and the sealing ring and the sealing gasket are used to improve the sealing performance of the sealing cap on one end of the pipe, thereby preventing the internal polyurethane foam from being eroded and maintaining the thermal insulation performance of the polyurethane foam.

[0025] The accuracy of cutting during the production of thermal insulation pipes is improved, which makes it easier for workers to load and unload materials, reduces their workload, and improves the production efficiency of thermal insulation pipes.

[0026] The dust generated when the insulation pipe is cut can be collected to prevent the dust from floating in the air and polluting the environment and affecting the health of the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the structure of the inner support ring of the present invention; Figure 4 It is a schematic diagram of the protective cover structure of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the production device of the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the production device of the present invention; Figure 7 It is a schematic diagram of the side structure of the production device of the present invention; Figure 8 It is an enlarged schematic diagram of the fixed structure of the production device of the present invention.

[0028] In the figure: 1. protective layer; 2. outer steel pipe; 3. guide strip; 4. outer support ring; 5. support rod; 6. inner support ring; 7. inner steel pipe; 8. guide block; 9. fixing bolt; 10. insulation layer; 11. guide groove; 12. connecting hole; 13. sealing ring; 14. through hole; 15. sealing cover. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] See also Figure 1-3An embodiment of the present invention is as follows: a prefabricated direct-buried steam insulation pipe comprises a protective layer 1, an outer steel pipe 2, and an outer support ring 4. The outer steel pipe 2 is arranged inside the protective layer 1, and the inner part of the outer steel pipe 2 is slidably connected with a guide bar 3, one side of the guide bar 3 is connected with the outer support ring 4, the outer support ring 4 is connected with a support rod 5, one end of the support rod 5 is connected with an inner support ring 6, an inner steel pipe 7 is arranged inside the inner support ring 6, and guide blocks 8 are evenly arranged on the inner surface of the inner support ring 6, a guide groove 11 is arranged on the outer side of the inner steel pipe 7, and the guide block 8 is slidably connected with the guide groove 11, and the guide block 8 on the inner support ring 6 is aligned with the guide groove 1 1. The guide strip 3 on the outer support ring 4 is aligned with the groove on the outer steel pipe 2, so that the outer support ring 4 and the inner support ring 6 are pushed into between the inner steel pipe 7 and the outer steel pipe 2, so as to increase the pipeline strength of the inner steel pipe 7 and the outer steel pipe 2. The positions of the outer support ring 4 and the inner support ring 6 inside the pipeline can be adjusted according to the length of the pipeline, so as to avoid welding and increase the convenience of pipeline construction. A connecting hole 12 is provided on the outer side of the outer support ring 4, and the fixing bolt 9 is connected to the outer support ring 4 through the connecting hole 12. The outer support ring 4 is fixed by the fixing bolt 9 and the connecting hole 12, so as to avoid the movement of the outer support ring 4 and improve the use stability of the outer support ring 4 and the inner support ring 6.

[0031] See also Figure 1-4 A cover 15 is embedded at one end of the outer steel pipe 2, and a fixing bolt 9 is provided on the cover 15. A sealing ring 13 is provided inside the cover 15, and the fixing bolt 9 penetrates the sealing ring 13. The fixing bolt 9 fixes the cover 15 to prevent the sealing ring 13 from being displaced, thereby reducing the sealing effect. A thermal insulation layer 10 is provided between the outer steel pipe 2 and the inner steel pipe 7, and the thermal insulation layer 10 is filled with polyurethane foam. A through hole 14 is provided inside the cover 15, and a sealing gasket is provided inside the through hole 14. The sealing ring 13 and the sealing gasket are provided to improve the sealing performance of the cover 15 to one end of the pipeline, thereby preventing the thermal insulation layer 10 from being affected by moisture, causing corrosion of the polyurethane foam, and reducing the thermal insulation performance.

[0032] Working principle: align the guide block 8 on the inner support ring 6 with the guide groove 11, and align the guide strip 3 on the outer support ring 4 with the groove on the outer steel pipe 2, so as to push the outer support ring 4 and the inner support ring 6 into between the inner steel pipe 7 and the outer steel pipe 2, so as to increase the pipeline strength for the inner steel pipe 7 and the outer steel pipe 2. The positions of the outer support ring 4 and the inner support ring 6 inside the pipeline can be adjusted according to the length of the pipeline, so as to avoid welding and increase the convenience of pipeline construction. The polyurethane foam is filled into the interior of the insulation layer 10. At this time, the cover 15 is inserted into one end of the pipeline, and the outer support ring 4 is fixed by the fixing bolts 9 and the connecting holes 12, so as to prevent the outer support ring 4 from moving. The sealing ring 13 and the sealing gasket are provided to improve the sealing performance of the cover 15 to one end of the pipeline, so as to prevent the internal polyurethane foam from being eroded.

[0033] See also Figure 5-8 A production device for prefabricated direct-buried steam insulation pipes, comprising a device base 101, a placement plate 104, an auxiliary table 106, a bracket 107, an arc frame 1010 and a cutting knife structure 1014, wherein both ends of the device base 101 are respectively provided with a ramp table 102, an auxiliary roller 103 is rotatably mounted on the ramp table 102, a bracket 107 is installed on the device base 101, a limit rod 108 is installed on the bracket 107, an arc frame 1010 is placed in the bracket 107, and the arc frame 1010 is placed in the bracket 107. A circular track 109 is provided on the outer wall of 10, one end of the limit rod 108 is slidably connected to the circular track 109, a telescopic rod 1013 is installed on the inner ring wall of the arc frame 1010, one end of the telescopic rod 1013 is installed with a cutting knife structure 1014, a gear ring 1015 is provided on the outer wall of the arc frame 1010, a motor A1016 is installed on the device base 101, a power gear roller 1017 is installed on the power shaft end of the motor A1016, and the power gear roller 1017 is meshed with the gear ring 1015.

[0034] The ramp platform 102 installed at both ends of the device base 101 cooperates with the auxiliary roller 103 rotatably installed on the ramp platform 102, so that the insulation pipe is moved to the device base 101 through the ramp platform 102, and the insulation pipe is placed on the placement plate 104 to cooperate with the auxiliary platform 106. The limiting rod 108 installed on the bracket 107 is slidably connected with the circular track 109 opened on the outer wall of the arc frame 1010, so that the insulation pipe passes through the arc frame 1010, and then the two ends of the insulation pipe are clamped and fixed, and the telescopic rod 1013 installed on the inner ring wall of the arc frame 1010 is extended by starting, driving the cutting knife structure 1014 installed at one end of the telescopic rod 1013 to move toward the insulation pipe. At the same time, the cutting knife structure 1014 is started to cut the insulation pipe. By starting the motor A1016 installed on the base 101 of the device, the power gear roller 1017 installed on the power shaft end of the motor A1016 is driven to rotate. Because the power gear roller 1017 is engaged with the gear ring 1015 set on the outer wall of the arc frame 1010, the arc frame 1010 is rotated, driving the cutting knife structure 1014 to rotate, completing the cutting operation of the entire insulation pipe. After cutting, the insulation pipe is unloaded through the ramp platform 102, which improves the accuracy of the insulation pipe production cutting, facilitates the loading and unloading of workers, reduces the workload of workers, and improves the production efficiency of the insulation pipe.

[0035] A placement plate 104 is installed on the table top of the device base 101, and a motor B1018 is installed in the placement plate 104. A gear 1019 is installed on the power shaft end of the motor B1018. The gear 1019 is meshed with a tooth plate 1020 installed in the placement plate 104, and a clamping fixing plate 105 is installed on the tooth plate 1020.

[0036] Through the placement plate 104 installed on the table top of the device base 101, the motor B1018 installed in the placement plate 104 is started to rotate forward and reverse, so that the gear 1019 installed on the power shaft end of the motor B1018 rotates forward and reverse, and the gear 1019 is engaged with the toothed plate 1020 installed in the placement plate 104, thereby driving the two sets of clamping and fixing plates 105 to move relative to each other, clamping and fixing the insulation pipe, avoiding the insulation pipe from moving during the cutting operation, and ensuring the accuracy of the insulation pipe during production and cutting.

[0037] A dust collection box 1012 is installed on the arc frame 1010 , and the dust collection box 1012 is connected to a dust collection hole 1011 opened on the inner ring wall of the arc frame 1010 .

[0038] By using the dust box 1012 installed on the arc frame 1010, the fan in the dust box 1012 is started, and the dust box 1012 is connected to the dust hole 1011 opened on the inner ring wall of the arc frame 1010. The dust generated when the insulation pipe is cut is sucked into the dust box 1012 through the dust hole 1011, and the dust is collected by the filter net in the dust box 1012 to prevent the dust from floating in the air and polluting the environment and affecting the health of the workers.

[0039] An auxiliary table 106 is installed on the table top of the device base 101, and an auxiliary roller is rotatably installed on the auxiliary table 106.

[0040] The auxiliary table 106 installed on the tabletop of the device base 101 cooperates with the auxiliary rollers rotatably installed on the auxiliary table 106 to facilitate the movement of the insulation pipe through the arc frame 1010.

[0041] The cutting blade structure 1014 includes a blade support, a blade motor and a cutting blade.

[0042] The cutting blade structure 1014 includes a blade support, a blade motor and a cutting blade. When the blade motor on the blade support is started, the blade motor drives the cutting blade to rotate and cut the insulation pipe.

[0043] The top surfaces of the placement plate 104 and the auxiliary table 106 are on the same horizontal plane.

[0044] The top surfaces of the placement plate 104 and the auxiliary platform 106 are on the same horizontal plane, ensuring that the insulation pipes are at the same horizontal height.

[0045] Working principle: The ramp platform 102 installed at both ends of the device base 101 cooperates with the auxiliary roller 103 rotatably installed on the ramp platform 102 to move the insulation pipe to the device base 101 through the ramp platform 102, and the insulation pipe is placed on the placement plate 104 to cooperate with the auxiliary platform 106, so that the insulation pipe passes through the arc frame 1010, passes through the placement plate 104 installed on the table top of the device base 101, and starts the motor B1018 installed in the placement plate 104 to rotate forward and reverse, so that the gear 1019 installed on the power shaft end of the motor B1018 rotates forward and reverse, and cooperates with the gear 1019 and The toothed plate 1020 installed in the placement plate 104 is meshed, thereby driving the two sets of clamping and fixing plates 105 to move relative to each other, clamping and fixing the insulation pipe to prevent the insulation pipe from moving during the cutting operation, ensuring the accuracy of the insulation pipe production and cutting. Then, after clamping and fixing the two ends of the insulation pipe, the telescopic rod 1013 installed on the inner ring wall of the arc frame 1010 is started to extend, driving the cutting knife structure 1014 installed at one end of the telescopic rod 1013 to move toward the insulation pipe, and at the same time starting the cutting knife structure 1014 to cut the insulation pipe, through the limit installed on the bracket 107 The rod 108 is slidably connected with the circular track 109 provided on the outer wall of the arc frame 1010, and plays a role of supporting and limiting the arc frame 1010. By starting the motor A1016 installed on the base 101 of the device, the power gear roller 1017 installed on the power shaft end of the motor A1016 is driven to rotate. Because the power gear roller 1017 is engaged with the gear ring 1015 provided on the outer wall of the arc frame 1010, the arc frame 1010 is rotated, driving the cutting knife structure 1014 to rotate, completing the cutting operation of the entire insulation pipe. After the cutting is completed, the insulation pipe passes through the ramp 102 is used for cutting, which improves the accuracy of the insulation pipe production and cutting, facilitates the loading and unloading of materials by the workers, reduces the workload of the workers, and improves the production efficiency of the insulation pipe. The fan in the dust box 1012 is started, and the dust box 1012 is connected with the dust hole 1011 opened on the inner ring wall of the arc frame 1010. The dust generated when the insulation pipe is cut is sucked into the dust box 1012 from the dust hole 1011, and the filter net in the dust box 1012 is used to collect the dust to prevent the dust from floating in the air to pollute the environment and affect the health of the workers.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A prefabricated direct-buried steam insulation pipe, comprising a protective layer (1), an outer steel pipe (2), and an outer support ring (4), characterized in that: An outer steel tube (2) is arranged inside the protective layer (1), a guide bar (3) is slidably connected inside the outer steel tube (2), an outer support ring (4) is connected to one side of the guide bar (3), a support rod (5) is connected inside the outer support ring (4), one end of the support rod (5) is connected to the inner support ring (6), an inner steel tube (7) is arranged inside the inner support ring (6), a cover (15) is embedded at one end of the outer steel tube (2), and a fixing bolt (9) is arranged on the cover (15).

2. The prefabricated direct buried steam insulation pipe according to claim 1 is characterized in that: The inner surface of the inner support ring (6) is evenly provided with guide blocks (8), the outer side of the inner steel pipe (7) is provided with a guide groove (11), and the guide block (8) is slidably connected to the guide groove (11).

3. The prefabricated direct buried steam insulation pipe according to claim 1 is characterized in that: A sealing ring (13) is provided inside the sealing cover (15), and the fixing bolt (9) passes through the sealing ring (13).

4. The prefabricated direct buried steam insulation pipe according to claim 1 is characterized in that: A thermal insulation layer (10) is provided between the outer steel pipe (2) and the inner steel pipe (7), and the thermal insulation layer (10) is filled with polyurethane foam.

5. The prefabricated direct buried steam insulation pipe according to claim 1 is characterized in that: The outer side of the outer support ring (4) is provided with a connection hole (12), and the fixing bolt (9) is connected to the outer support ring (4) through the connection hole (12); the interior of the cover (15) is provided with a through hole (14), and the interior of the through hole (14) is provided with a sealing gasket.

6. A production device for prefabricated direct buried steam insulation pipe, characterized in that: A prefabricated direct-buried steam insulation pipe according to claims 1 to 5 is used, comprising a device base (101), a placement plate (104), an auxiliary table (106), a bracket (107), an arc frame (1010) and a cutting knife structure (1014), wherein ramp tables (102) are respectively installed at both ends of the device base (101), an auxiliary roller (103) is rotatably installed on the ramp table (102), a bracket (107) is installed on the device base (101), a limit rod (108) is installed on the bracket (107), an arc frame (1010) is placed in the bracket (107), and the arc A circular track (109) is provided on the outer wall of the frame (1010); one end of the limit rod (108) is slidably connected to the circular track (109); a telescopic rod (1013) is installed on the inner ring wall of the arc frame (1010); a cutting knife structure (1014) is installed on one end of the telescopic rod (1013); a gear ring (1015) is provided on the outer wall of the arc frame (1010); a motor A (1016) is installed on the device base (101); a power gear roller (1017) is installed on the power shaft end of the motor A (1016); and the power gear roller (1017) is meshed with the gear ring (1015).

7. The production device of a prefabricated direct-buried steam insulation pipe according to claim 6 is characterized in that: A placement plate (104) is installed on the table top of the device base (101), a motor B (1018) is installed in the placement plate (104), a gear (1019) is installed at the end of the power shaft of the motor B (1018), the gear (1019) is meshed with a toothed plate (1020) installed in the placement plate (104), and a clamping fixing plate (105) is installed on the toothed plate (1020).

8. The production device of a prefabricated direct-buried steam insulation pipe according to claim 6 is characterized in that: A dust collection box (1012) is installed on the circular arc frame (1010), and the dust collection box (1012) is connected to a dust collection hole (1011) opened on the inner ring wall of the circular arc frame (1010).

9. The production device of a prefabricated direct-buried steam insulation pipe according to claim 7, characterized in that: An auxiliary table (106) is installed on the table top of the device base (101), and an auxiliary roller is rotatably installed on the auxiliary table (106); the top surface of the placement plate (104) and the auxiliary table (106) are on the same horizontal plane.

10. The production device of a prefabricated direct-buried steam insulation pipe according to claim 6, characterized in that: The cutting blade structure (1014) comprises a blade support, a blade motor and a cutting blade.

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