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

Abstract

The invention discloses a prefabricated directly-buried steam heat preservation pipe fitting and a production device thereof.The prefabricated directly-buried steam heat preservation pipe fitting comprises a connecting pipe B, an outer steel pipe and a working steel pipe, the connecting pipe B is composed of the outer steel pipe and the working steel pipe, the outer steel pipe is internally connected with the working steel pipe through a connecting column, and a connecting piece A is arranged at one end of the connecting pipe B; one side of the connecting piece A is in bolted connection with a connecting piece B, one side of the connecting piece B is connected with a connecting pipe A, connecting pieces are arranged on the two sides of the connecting pipe B, induction pieces are arranged on the inner sides of the connecting pieces, springs are connected to the outer sides of the connecting pieces, and one ends of the two springs are connected with a connecting block A and a connecting block B respectively. The sensing piece on one side of the connecting piece is driven to be tightly attached to the outer side of the outer steel pipe under the action of the spring, so that when water leakage occurs at the joint of the connecting pipe A and the connecting pipe B, the sensing piece timely knows the situation, the air pressure between the connecting block A and the connecting block B is detected through the air pressure sensor, and whether the pipeline leaks air or not is known.

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 fitting and a production device thereof. Background Art

[0002] Steam insulated pipes play a vital role in industrial production and life. It is a pipe used to transport high-temperature steam, mainly composed of an inner pipe, an insulation layer and an outer shell. The insulation materials of the outer shell of the pipe, such as aluminum silicate and glass wool, can reduce heat loss, improve the efficiency of steam transportation, reduce energy consumption, and also improve the efficiency of industrial production. Steam insulated pipes can also reduce environmental pollution to a certain extent. As a clean energy source, steam can replace raw energy sources such as coal and gas, reducing environmental pollution and energy waste.

[0003] The existing device will have the following problems when in use: when the steam insulation pipe is installed and connected, the connection is easily compressed and damaged, resulting in leakage at the connection, and it is difficult to detect the leakage in time, resulting in reduced performance of the steam insulation pipe and affecting the safety effect of the entire transportation system. Summary of the invention

[0004] The object of the present invention is to provide a prefabricated direct-buried steam insulation pipe fitting 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 fitting, comprising a connecting pipe B, an outer steel pipe, and a working steel pipe, wherein the connecting pipe B is composed of an outer steel pipe and a working steel pipe, wherein the outer steel pipe is connected to the working steel pipe through a connecting column, and a connecting piece A is provided at one end of the connecting pipe B, and a connecting piece A and a connecting piece B on the connecting pipe A are aligned with each other, and the connecting piece A and the connecting piece B are connected by bolts, so that the connecting pipe A is connected to the connecting pipe B, and the connecting pipe B is connected by bolts. One side of the connecting piece B is connected to a connecting pipe A, and both sides of the connecting pipe B are provided with connecting plates, the inner side of the connecting plate is provided with a sensing plate, and the outer side of the connecting plate is connected with a spring, and one end of the two groups of springs are respectively connected to a connecting block A and a connecting block B. Under the action of the spring, the sensing plate on one side of the connecting plate is driven to be close to the outer side of the outer steel pipe, so that when water leakage occurs at the connection between the connecting pipe A and the connecting pipe B, the sensing plate is promptly detected, and one side of the connecting block A and the connecting block B is provided with an extension block, and reinforcing ribs are provided in the extension block.

[0006] In a further embodiment, a thermal insulation material is provided between the outer steel pipe and the working steel pipe, and the thermal insulation material is made of polyurethane foam to improve the thermal insulation effect of the pipeline.

[0007] In a further embodiment, the sensing sheet is provided with an arc shape, and two groups of sensing sheets are arranged opposite to each other, so as to fit the connecting pipe A and the connecting pipe B, and leakage can be discovered in time when it occurs.

[0008] In a further embodiment, the connection block A is connected to the connection block B by means of mounting bolts, and the connection block A and the connection block B have the same structure.

[0009] In a further embodiment, the material of the extension block is set to rubber material, and the material of the reinforcement rib is set to alloy steel. The extension block is combined with the reinforcement rib to increase the strength of the connection, and the reinforcement rib evenly disperses the force.

[0010] In a further embodiment, an air pressure detection sensor is provided inside the connection block B, and the air pressure between the connection block A and the connection block B is detected by the air pressure sensor to understand whether the pipeline is leaking.

[0011] A production device for prefabricated direct-buried steam insulation pipe fittings, comprising a workbench, a transport roller, a mounting plate, an inner ring, an outer ring and a servo motor, wherein a water trough is provided on the workbench, a transport roller is installed on the workbench, a bracket is installed in the water trough, an outer ring is installed on the top of the bracket, a flushing head B and a blowing head B are installed on the inner ring wall of the outer ring, a mounting plate is installed on the workbench, a fixing rod is installed on the mounting plate, an inner ring is installed at one end of the fixing rod, a flushing head A and a blowing head A are installed on the outer ring wall of the inner ring, and the inner ring is located in the ring of the outer ring.

[0012] By adopting the above technical scheme, the insulation pipe is placed on the transport rollers installed on the workbench, and the servo motor is started to drive multiple groups of transport rollers to rotate, so as to transport the insulation pipe to the installation plate. The insulation pipe comes to the outer ring installed on the top of the bracket, and the outer ring is located outside the outer wall of the insulation pipe. The inner ring installed at one end of the fixed rod is located in the insulation pipe channel. The water pump installed on the main water pipe is started to transport the cooling water in the water tank through the water distribution pipe A and the water distribution pipe B to the flushing head B installed on the inner ring wall of the outer ring and the flushing head installed on the outer ring wall of the inner ring. The water sprayed at head A and flushing head B cools the outer wall of the insulation pipe, and the water sprayed at flushing head A cools the inner wall of the insulation pipe. By cooling the inner and outer walls of the insulation pipe at the same time, the cooling efficiency of the equipment on the insulation pipe fittings is improved. After water cooling, the fan is started again, and the air is blown out from the blowing heads B and blowing heads A in conjunction with the branch air ducts A and B to blow and cool the inner and outer walls of the insulation pipe, avoiding the influence of a single cooling method on the cooling effect of the insulation pipe and improving the cooling effect of the equipment on the insulation pipe fittings.

[0013] Preferably, a main water pipe is installed in the sink, a water pump is installed on the main water pipe, a filter is installed at one end of the main water pipe located in the sink, a water distribution pipe A and a water distribution pipe B are installed on the main water pipe, the other end of the water distribution pipe A is connected to the flushing head A on the inner ring, and the other end of the water distribution pipe B is connected to the flushing head B on the outer ring.

[0014] By adopting the above technical scheme, through the main water pipe installed in the water tank, in cooperation with the water pump installed on the main water pipe, the cooling water in the water tank is transported through the water distribution pipe A and the water distribution pipe B to the flushing head B installed on the inner ring wall of the outer ring and the flushing head A installed on the outer ring wall of the inner ring, respectively, to cool the inner and outer walls of the insulation pipe. Through the filter net installed at one end of the main water pipe, the cooling water can be filtered and reused, avoiding waste of water resources and improving the environmental protection and energy saving of the equipment.

[0015] Preferably, a fan is installed on the mounting plate, and branch air duct A and branch air duct B are installed on the main air duct on the fan, the other end of the branch air duct A is connected to the blowing head A on the inner ring, and the other end of the branch air duct B is connected to the blowing head B on the outer ring.

[0016] By adopting the above technical solution, the fan installed on the mounting plate cooperates with the branch air duct A and branch air duct B installed on the main air duct on the fan, so that air is blown out from the blowing head B and the blowing head A to blow and cool the inner and outer walls of the insulation pipe.

[0017] Preferably, a servo motor is installed on the workbench, the power shaft end of the servo motor is connected to the transport roller, and multiple groups of the transport rollers are connected by a conveyor belt.

[0018] By adopting the above technical solution, a servo motor installed on the workbench is started to rotate, which drives a group of transport rollers to rotate. Through the conveyor belt structure arranged between the multiple groups of transport rollers, the multiple groups of transport rollers are rotated to transport the insulation pipe.

[0019] Preferably, the transport rollers are provided in multiple groups, and limiting rings are installed at both ends of the transport rollers.

[0020] By adopting the above technical solution, the limiting rings installed at both ends of the transport roller can prevent the insulation pipe from being offset when moving.

[0021] Preferably, a heat preservation tube is placed on the transport roller, and a circuit controller is installed on the servo motor.

[0022] By adopting the above technical solution, the circuit controller installed on the motor changes the rotation direction of the motor shaft by swapping the positive and negative poles of the DC motor power supply, thereby achieving the purpose of bidirectional alternating rotation of the motor shaft.

[0023] Compared with the prior art, the present invention has the following beneficial effects: Under the action of the spring, the sensing piece on one side of the connecting piece is driven to be close to the outside of the outer steel pipe, so that when water leakage occurs at the connection between the connecting pipe A and the connecting pipe B, the sensing piece will be timely detected, and the air pressure between the connecting block A and the connecting block B will be detected by the air pressure sensor to understand whether the pipeline is leaking, thereby improving the safety of pipeline use.

[0024] The strength of the connection is increased by using the extension block in conjunction with the reinforcement ribs. The reinforcement ribs evenly disperse the force so that the impact force is transmitted in a straight line along the reinforcement ribs, thereby avoiding damage to the connection.

[0025] By cooling the inner and outer walls of the insulated pipe at the same time, the cooling efficiency of the equipment on the insulated pipe fittings is improved.

[0026] By blowing air to cool the inner and outer walls of the insulated pipe, the cooling effect of the insulated pipe is prevented from being affected by a single cooling method, thereby improving the cooling effect of the equipment on the insulated pipe fittings. 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 structural schematic diagram of a connecting member A of the present invention; Figure 4 This is a schematic structural diagram of the connection block B 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 working structure of the production device of the present invention; Figure 8 It is a schematic diagram of the side structure of the production device of the present invention.

[0028] In the figure: 1. Connecting block A; 2. Mounting bolts; 3. Connecting plate; 4. Spring; 5. Induction plate; 6. Extension block; 7. Reinforcement ribs; 8. Outer steel pipe; 9. Working steel pipe; 10. Connecting piece A; 11. Connecting block B; 12. Insulating material; 13. Connecting pipe A; 14. Connecting piece B; 15. Connecting pipe B; 16. Connecting column; 17. Air pressure detection sensor. 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 1-3 An embodiment of the present invention is as follows: a prefabricated direct-buried steam insulation pipe fitting comprises a connecting pipe B15, an outer steel pipe 8 and a working steel pipe 9, wherein the connecting pipe B15 is composed of the outer steel pipe 8 and the working steel pipe 9, wherein the outer steel pipe 8 is connected to the working steel pipe 9 via a connecting column 16, wherein a connecting piece A10 is provided at one end of the connecting pipe B15, wherein a connecting piece B14 is bolted to one side of the connecting piece A10, wherein a connecting pipe A13 is connected to one side of the connecting piece B14, wherein the connecting pipe A13 is aligned with the connecting piece A10 and the connecting piece B14 on the connecting pipe B15, wherein the connecting piece A10 and the connecting piece B14 are connected via bolts, thereby connecting the connecting pipe A13 and the connecting pipe B15 are connected, wherein an insulation material 12 is provided between the outer steel pipe 8 and the working steel pipe 9, wherein the insulation material 12 is made of polyurethane foam to increase the insulation effect of the pipeline.

[0031] See also Figure 1-4 , both sides of the connecting pipe B15 are provided with connecting pieces 3, the inner side of the connecting piece 3 is provided with a sensing piece 5, the outer side of the connecting piece 3 is connected with a spring 4, one end of the two groups of the springs 4 are respectively connected with a connecting block A1 and a connecting block B11, the sensing piece 5 is provided with an arc shape, and the two groups of sensing pieces 5 are arranged oppositely, and under the action of the spring 4, the sensing piece 5 on one side of the connecting piece 3 is driven to be close to the outer side of the outer steel pipe 8, so that when there is a water leakage at the connection between the connecting pipe A13 and the connecting pipe B15, the sensing piece 5 is timely informed, the connecting block A1 and the connecting block B11 are connected by the mounting bolts 2, and the connecting block A1 and the connecting block B11 are fixedly installed by the mounting bolts 2, and the connecting The connection block A1 has the same structure as the connection block B11. An air pressure detection sensor 17 is arranged inside the connection block B11. The air pressure detection sensor 17 detects the air pressure between the connection block A1 and the connection block B11, so as to understand whether the pipeline is leaking, thereby improving the safety of pipeline use. An extension block 6 is arranged on one side of the connection block A1 and the connection block B11. A reinforcing rib 7 is arranged inside the extension block 6. The material of the extension block 6 is set to rubber material, and the material of the reinforcing rib 7 is set to alloy steel. The extension block 6 is matched with the reinforcing rib 7 to increase the strength of the connection. The reinforcing rib 7 evenly disperses the force, so that the impact force is transmitted in a straight line along the reinforcing rib 7, thereby avoiding damage to the connection.

[0032] Working principle: align the connecting parts A10 and B14 on the connecting pipe A13 and the connecting pipe B15, connect the connecting parts A10 and B14 by bolts, so as to connect the connecting pipe A13 and the connecting pipe B15, install the connecting block A1 and the connecting block B11 on the outside of the connecting parts A10 and B14, and fix the connecting block A1 and the connecting block B11 by installing the bolts 2, so that the sensing piece 5 on one side of the connecting piece 3 is driven to be close to the outside of the outer steel pipe 8 under the action of the spring 4, so that when there is a water leakage at the connection between the connecting pipe A13 and the connecting pipe B15, the sensing piece 5 will know it in time, and the air pressure between the connecting block A1 and the connecting block B11 will be detected by the air pressure detection sensor 17, so as to know whether the pipeline is leaking, thereby improving the safety of pipeline use, and the strength of the connection is increased by the extension block 6 and the reinforcing rib 7, and the reinforcing rib 7 will evenly disperse the force.

[0033] See also Figure 5-8 A production device for prefabricated direct-buried steam insulation pipe fittings, comprising a workbench 101, a transport roller 103, a mounting plate 105, an inner ring 107, an outer ring 1016 and a servo motor 1023, wherein the workbench 101 is provided with a water tank 102, the workbench 101 is provided with a transport roller 103, a bracket 15 is installed in the water tank 102, an outer ring 1016 is installed at the top of the bracket 15, a flushing head B1018 and a blowing head B1017 are installed on the inner ring wall of the outer ring 1016, a mounting plate 105 is installed on the workbench 101, a fixing rod 106 is installed on the mounting plate 105, an inner ring 107 is installed at one end of the fixing rod 106, a flushing head A109 and a blowing head A108 are installed on the outer ring wall of the inner ring 107, and the inner ring 107 is located in the ring of the outer ring 1016.

[0034] The insulation pipe 1022 is placed on the transportation roller 103 through the transportation roller 103 installed on the workbench 101, and the servo motor 1023 is started to drive multiple groups of transportation rollers 103 to rotate, and the insulation pipe 1022 is transported to the installation plate 105. The insulation pipe 1022 comes to the outer ring 1016 installed on the top of the bracket 15. The outer ring 1016 is located outside the outer wall of the insulation pipe 1022. The inner ring 107 installed at one end of the fixing rod 106 is located in the channel of the insulation pipe 1022. The water pump 1021 installed on the main water pipe 1020 is started to transport the cooling water in the water tank 102 through the water distribution pipe A1010 and the water distribution pipe B1013, respectively, to the flushing head B1 installed on the inner ring wall of the outer ring 1016. 018 and the flushing head A109 installed on the outer ring wall of the inner ring ring 107, the water sprayed from the flushing head B1018 cools the outer wall of the insulation pipe 1022, and the water sprayed from the flushing head A109 cools the inner wall of the insulation pipe 1022. By cooling the inner and outer walls of the insulation pipe at the same time, the cooling efficiency of the equipment for the insulation pipe fittings is improved. After water cooling, the fan 1012 is started again, and the branch air duct A1011 and the branch air duct B1014 are cooperated to blow wind from the blowing head B1017 and the blowing head A108 to blow and cool the inner and outer walls of the insulation pipe, thereby avoiding a single cooling method affecting the cooling effect of the insulation pipe and improving the cooling effect of the equipment on the insulation pipe fittings.

[0035] A main water pipe 1020 is installed in the water tank 102, and a water pump 1021 is installed on the main water pipe 1020. A filter screen 1019 is installed at one end of the main water pipe 1020 located in the water tank 102. A water distribution pipe A1010 and a water distribution pipe B1013 are installed on the main water pipe 1020. The other end of the water distribution pipe A1010 is connected to the flushing head A109 on the inner ring 107, and the other end of the water distribution pipe B1013 is connected to the flushing head B1018 on the outer ring 1016.

[0036] Through the main water pipe 1020 installed in the water tank 102, in cooperation with the water pump 1021 installed on the main water pipe 1020, the cooling water in the water tank 102 is transported through the branch water pipe A1010 and the branch water pipe B1013 to the flushing head B1018 installed on the inner ring wall of the outer ring ring 1016 and the flushing head A109 installed on the outer ring wall of the inner ring ring 107, respectively, to cool the inner and outer walls of the insulation pipe. Through the filter net 1019 installed at one end of the main water pipe 1020, the cooling water can be filtered and reused, avoiding waste of water resources and improving the environmental protection and energy saving of the equipment.

[0037] A fan 1012 is installed on the mounting plate 105, and a branch air duct A1011 and a branch air duct B1014 are installed on the main air duct on the fan 1012. The other end of the branch air duct A1011 is connected to the blowing head A108 on the inner ring 107, and the other end of the branch air duct B1014 is connected to the blowing head B1017 on the outer ring 1016.

[0038] Through the fan 1012 installed on the mounting plate 105, in cooperation with the branch air duct A1011 and the branch air duct B1014 installed on the main air duct on the fan 1012, wind is blown out from the blowing head B1017 and the blowing head A108 to blow and cool the inner and outer walls of the insulation pipe.

[0039] A servo motor 1023 is installed on the workbench 101 , and a power shaft end of the servo motor 1023 is connected to a transport roller 103 , and a plurality of groups of transport rollers 103 are connected by a conveyor belt.

[0040] By starting the servo motor 1023 installed on the workbench 101 to rotate, a group of transport rollers 103 are driven to rotate, and through the conveyor belt structure arranged between the multiple groups of transport rollers 103, the multiple groups of transport rollers 103 are rotated to transport the insulation pipe 1022.

[0041] The transport rollers 103 are provided in multiple groups, and limit rings 104 are installed at both ends of the transport rollers 103 .

[0042] The limiting rings 104 installed at both ends of the transport roller 103 can prevent the insulation pipe 1022 from deviating when moving.

[0043] A heat preservation tube 1022 is placed on the transport roller 103 , and a circuit controller is installed on the servo motor 1023 .

[0044] The circuit controller installed on the motor changes the positive and negative poles of the DC motor power supply to change the rotation direction of the motor shaft, thereby achieving the purpose of bidirectional alternating rotation of the motor shaft.

[0045] Working principle: The insulation tube 1022 is placed on the transportation roller 103 through the transportation roller 103 installed on the workbench 101, and a group of transportation rollers 103 are driven to rotate by starting the servo motor 1023. The conveyor belt structure arranged between the multiple groups of transportation rollers 103 makes the multiple groups of transportation rollers 103 rotate to transport the insulation tube 1022. The insulation tube 1022 is transported to the installation plate 105, and the insulation tube 1022 comes to the outer ring 1016 installed on the top of the bracket 15. The outer ring 1016 is located outside the outer wall of the insulation tube 1022, and the inner ring 107 installed at one end of the fixing rod 106 is located in the channel of the insulation tube 1022. The water pump 1021 installed on the main water pipe 1020 is started to pump the cooling water in the water tank 102 through the water distribution pipe A1010 and the water distribution pipe B101. 3. Transport them to the flushing head B1018 installed on the inner wall of the outer ring 1016 and the flushing head A109 installed on the outer wall of the inner ring 107 respectively. The water sprayed from the flushing head B1018 cools the outer wall of the insulation pipe 1022, and the water sprayed from the flushing head A109 cools the inner wall of the insulation pipe 1022. By cooling the inner and outer walls of the insulation pipe at the same time, the cooling efficiency of the equipment for the insulation pipe fittings is improved. After water cooling, start the fan 1012 again, cooperate with the branch air duct A1011 and the branch air duct B1014, so that wind is blown out from the blowing head B1017 and the blowing head A108 to blow and cool the inner and outer walls of the insulation pipe, avoiding the influence of a single cooling method on the cooling effect of the insulation pipe, and improving the cooling effect of the equipment on the insulation pipe fittings.

[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 fitting, comprising a connecting pipe B (15), an outer steel pipe (8), and a working steel pipe (9), characterized in that: The connecting pipe B (15) is composed of an outer steel pipe (8) and a working steel pipe (9). The outer steel pipe (8) is connected to the working steel pipe (9) via a connecting column (16). A connecting piece A (10) is provided at one end of the connecting pipe B (15). A connecting piece B (14) is bolted to one side of the connecting piece A (10). One side of the connecting piece B (14) is connected to the connecting pipe A (13). Connecting plates (3) are provided on both sides of the connecting pipe B (15). An induction plate (5) is provided on the inner side of the connecting plate (3). A spring (4) is connected to the outer side of the connecting plate (3). One end of the two groups of springs (4) are respectively connected to a connecting block A (1) and a connecting block B (11). An extension block (6) is provided on one side of the connecting block A (1) and the connecting block B (11). A reinforcing rib (7) is provided inside the extension block (6).

2. The prefabricated direct buried steam insulation pipe fitting according to claim 1 is characterized in that: A heat-insulating material (12) is provided between the outer steel pipe (8) and the working steel pipe (9), and the heat-insulating material (12) is made of polyurethane foam.

3. The prefabricated direct buried steam insulation pipe fitting according to claim 1 is characterized in that: The induction sheets (5) are arranged in an arc shape, and two groups of induction sheets (5) are arranged opposite to each other.

4. The prefabricated direct buried steam insulation pipe fitting according to claim 1, characterized in that: The connecting block A (1) and the connecting block B (11) are connected by means of mounting bolts (2); the connecting block A (1) and the connecting block B (11) have the same structure.

5. The prefabricated direct buried steam insulation pipe fitting according to claim 1 is characterized in that: The material of the extension block (6) is set to be rubber material, and the material of the reinforcing rib (7) is set to be alloy steel; an air pressure detection sensor (17) is arranged inside the connection block B (11).

6. A production device for prefabricated direct buried steam insulation pipe fittings, characterized in that: The invention comprises a prefabricated direct-buried steam insulation pipe fitting according to any one of claims 1 to 5, comprising a workbench (101), a transport roller (103), a mounting plate (105), an inner ring (107), an outer ring (1016) and a servo motor (1023), wherein a water tank (102) is arranged on the workbench (101), a transport roller (103) is mounted on the workbench (101), a bracket (1015) is mounted in the water tank (102), and an outer ring (1016) is mounted on the top of the bracket (1015). 6), a flushing head B (1018) and a blowing head B (1017) are mounted on the inner ring wall of the outer ring (1016), a mounting plate (105) is mounted on the workbench (101), a fixing rod (106) is mounted on the mounting plate (105), an inner ring (107) is mounted on one end of the fixing rod (106), a flushing head A (109) and a blowing head A (108) are mounted on the outer ring wall of the inner ring (107), and the inner ring (107) is located in the ring of the outer ring (1016).

7. The production device of prefabricated direct buried steam insulation pipe fittings according to claim 6 is characterized in that: A main water pipe (1020) is installed in the water tank (102), a water pump (1021) is installed on the main water pipe (1020), a filter (1019) is installed on one end of the main water pipe (1020) located in the water tank (102), a water distribution pipe A (1010) and a water distribution pipe B (1013) are installed on the main water pipe (1020), the other end of the water distribution pipe A (1010) is connected to a flushing head A (109) on the inner ring (107), and the other end of the water distribution pipe B (1013) is connected to a flushing head B (1018) on the outer ring (1016).

8. The production device of prefabricated direct buried steam insulation pipe fittings according to claim 6 is characterized in that: A fan (1012) is installed on the mounting plate (105); a branch air duct A (1011) and a branch air duct B (1014) are installed on the main air duct on the fan (1012); the other end of the branch air duct A (1011) is connected to a blow head A (108) on the inner ring (107); and the other end of the branch air duct B (1014) is connected to a blow head B (1017) on the outer ring (1016).

9. The production device of prefabricated direct buried steam insulation pipe fittings according to claim 6, characterized in that: A servo motor (1023) is installed on the workbench (101); a power shaft end of the servo motor (1023) is connected to a transport roller (103); and a plurality of groups of transport rollers (103) are connected via a conveyor belt.

10. The production device of prefabricated direct buried steam insulation pipe fittings according to claim 6, characterized in that: The transport rollers (103) are provided in multiple groups, and limit rings (104) are installed at both ends of the transport rollers (103); a heat preservation tube (1022) is placed on the transport rollers (103), and a circuit controller is installed on the servo motor (1023).

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