Thermal insulation structure of prefabricated directly-buried thermal insulation pipe and preparation device of thermal insulation structure

Abstract

The heat preservation structure comprises a working inner pipe, an outer protection steel pipe, a supporting frame and a blocking plate, the outer wall of the working inner pipe is wrapped with a steel wire mesh layer, a first heat preservation layer is arranged on the outer layer of the steel wire mesh layer, the outer wall of the first heat preservation layer is wrapped with a first glass fiber layer, and the outer wall of the first glass fiber layer is wrapped with a second glass fiber layer. The outer side of the first glass fiber layer is sleeved with a middle-layer steel pipe, the outer wall of the middle-layer steel pipe is wrapped with a reflecting layer, the outer wall of the reflecting layer is provided with a second heat preservation layer, the outer wall of the second heat preservation layer is wrapped with a second glass fiber layer, and the outer side of the second glass fiber layer is sleeved with an outer protection steel pipe. By arranging the two heat preservation layers and the two outer steel pipes, the heat preservation effect of the heat preservation pipe and the overall strength of the pipeline are improved, heat transfer between the pipelines can be avoided through the multiple sets of supporting frames arranged between the outer protection steel pipe and the working inner pipe in cooperation with the aluminum oxide ceramic blocks installed at the two ends of the supporting frames, the heat preservation effect is guaranteed, and meanwhile the supporting strength is provided.

Description

Technical Field

[0001] The invention relates to the relevant field of prefabricated direct-buried thermal insulation pipes, and in particular to a thermal insulation structure of a prefabricated direct-buried thermal insulation pipe and a preparation device thereof. Background Art

[0002] Prefabricated direct buried insulated pipes are widely used in liquid and gas transportation pipelines, chemical pipeline insulation projects, petroleum, chemical industry, central heating network, central air-conditioning ventilation ducts, municipal engineering, etc. High-temperature prefabricated direct buried insulated pipes are a kind of direct buried prefabricated insulated pipes with good thermal insulation performance, high safety and reliability, and low engineering cost. They effectively solve the insulation, sliding lubrication and waterproofing problems of prefabricated direct buried insulated pipes for high-temperature heat transmission at 130℃-600℃ in large city centralized heating.

[0003] The existing device has the following shortcomings when in use: the insulation structure of the prefabricated direct-buried insulation pipe generally only has a single layer between the outer pipe and the inner pipe, and the insulation effect and the overall strength of the pipe are not high. Summary of the invention

[0004] The object of the present invention is to provide an insulation structure of a prefabricated direct-buried insulation pipe and a preparation device thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an insulation structure of a prefabricated direct-buried insulated pipe, comprising a working inner pipe, an outer protective steel pipe, a support frame and a blocking plate, the outer wall of the working inner pipe is wrapped with a steel mesh layer, the outer layer of the steel mesh layer is provided with a first insulation layer, the outer wall of the first insulation layer is wrapped with a first glass fiber layer, the outer side of the first glass fiber layer is covered with a middle-layer steel pipe, the outer wall of the middle-layer steel pipe is wrapped with a reflective layer, the outer wall of the reflective layer is provided with a second insulation layer, the outer wall of the second insulation layer is wrapped with a second glass fiber layer, and the outer side of the second glass fiber layer is covered with an outer protective steel pipe.

[0006] By adopting the above technical scheme, the bearing capacity and strength of the working inner pipe are improved by the steel mesh layer wrapped around the outer wall of the working inner pipe, and the first insulation layer arranged on the outer layer of the steel mesh layer cooperates with the first glass fiber layer wrapped around the outer wall of the first insulation layer to play a heat insulation role, and the strength of the insulation pipe is increased by the middle steel pipe sheathed on the outside of the first glass fiber layer, and the overall strength and insulation effect of the insulation pipe are increased by the second insulation layer arranged between the middle steel pipe and the outer protective steel pipe, in cooperation with the reflective layer and the second glass fiber layer, and by arranging two insulation layers and two outer steel pipes, the insulation effect of the insulation pipe and the overall strength of the pipeline are improved.

[0007] Preferably, a support frame is provided between the outer protective steel pipe and the working inner pipe, alumina ceramic blocks are installed at both ends of the support frame, multiple groups of the support frames are provided, and the material of the support frames is metal.

[0008] By adopting the above technical solution, multiple sets of support frames are set between the outer protective steel pipe and the working inner pipe. The support frames are made of metal and provide support for the insulation pipe. Alumina ceramic blocks are installed at both ends of the support frames. The alumina ceramic blocks are made of insulating and hard materials and can avoid heat transfer between the pipes to ensure the insulation effect while providing support strength.

[0009] Preferably, blocking plates are installed at both ends of the outer protective steel pipe, and the inner ring of the blocking plate is tightly connected to the outer wall of the working inner pipe.

[0010] By adopting the above technical solution, by installing plugging plates at both ends of the outer protective steel pipe, water can be effectively prevented from entering the insulation layer from both ends, reducing maintenance work and increasing the service life of the insulation pipe.

[0011] Preferably, an anti-rust layer is provided on the inner wall of the working inner tube.

[0012] By adopting the above technical solution, the anti-rust layer is provided on the inner wall of the working inner tube, thereby preventing the inner wall of the working inner tube from rusting, thereby ensuring the service life of the insulation tube.

[0013] Preferably, an anti-corrosion layer is provided on the outer wall of the outer protective steel pipe.

[0014] By adopting the above technical solution, the anti-corrosion layer is arranged on the outer wall of the outer protective steel pipe to avoid rust of the outer protective steel pipe and extend the service life of the insulation pipe.

[0015] Preferably, the first thermal insulation layer and the second thermal insulation layer are made of polyurethane or sponge.

[0016] A preparation device for the insulation structure of a prefabricated direct-buried insulation pipe comprises a shell, a gear ring, and an electric push rod. The shell is slidably connected to the gear ring, and electric push rods are installed on both sides of the gear ring. One end of the electric push rod is fixedly connected to a limit plate. The insulation pipe is placed inside two groups of shells, and the electric push rod is started to drive the limit plate to clamp and fix the insulation pipe. The rotating motor is started to drive the gear to rotate, and the gear drives the gear ring to rotate in the shell, so that the polyurethane foam inside the insulation pipe is evenly spread in the interlayer of the insulation pipe. The bottom of the shell is connected to a base, and the base is connected to a cutting frame. An electric telescopic rod is installed on the cutting frame, and the output end of the electric telescopic rod is fastened with a cutting blade. The electric telescopic rod on the cutting frame is started to drive the cutting blade to move in the slide groove, so that the cutting blade cuts the polyurethane foam connected to the head, thereby improving the preparation efficiency of the insulation pipe. A rotating gear is installed inside the base, and the rotating gear is meshed with teeth. The top of the teeth is connected to a mounting frame, and a head is installed on one side of the mounting frame. The servo motor is started to drive the rotating gear to rotate, and the rotating gear cooperates with the teeth to move the head, so that the head blocks one end of the insulation pipe.

[0017] In a further embodiment, a gear is meshed at the bottom of the gear ring, and a rotating motor is mounted on one side of the gear.

[0018] In a further embodiment, slide grooves are provided on both sides of the cutting frame, and the cutting blade is slidably connected with the cutting blade so that the cutting blade maintains linear motion.

[0019] In a further embodiment, a sealing gasket is provided on one side of the sealing head, and a servo motor is installed on one side of the rotating gear, and the sealing gasket improves the sealing performance of the sealing head during operation.

[0020] In a further embodiment, a connecting cylinder is connected to the interior of the gear ring, a guide rod is arranged in the connecting cylinder, and one end of the guide rod is fixedly connected to a limit plate to maintain the stability of the limit plate when moving.

[0021] In a further embodiment, the cutting frame is located between the shell and the head, a slot is provided on one side of the base, a mounting frame is provided inside the slot, and the mounting frame moves inside the slot.

[0022] Compared with the prior art, the present invention has the following beneficial effects: By providing two layers of insulation layers and two layers of outer steel pipes, the insulation effect of the insulation pipe and the overall strength of the pipeline are improved.

[0023] By setting up multiple sets of support frames between the outer protective steel pipe and the working inner pipe, and cooperating with the alumina ceramic blocks installed at both ends of the support frames, heat transfer between the pipes can be avoided to ensure the thermal insulation effect, while providing support strength.

[0024] The electric telescopic rod on the cutting frame is started to drive the cutting blade to move in the slide slot, so that the cutting blade cuts the polyurethane foam connected to the head, making it easy to quickly unload the prepared insulation pipe, thereby improving the preparation efficiency of the insulation pipe.

[0025] The rotating motor is started to drive the gear to rotate, and the gear drives the gear ring to rotate in the shell, so that the polyurethane foam inside the insulation pipe is evenly spread in the interlayer of the insulation pipe, thereby improving the insulation performance inside the insulation pipe and making the filling quality better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the thermal insulation pipe of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the thermal insulation pipe of the present invention with its port opened; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 It is a side structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of the overall structure of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the shell of the present invention; Figure 7 It is a schematic diagram of the structure of the cutting frame of the present invention; Figure 8 It is a schematic diagram of the head structure of the present invention.

[0027] In the figure: 1. working inner pipe; 2. anti-rust layer; 3. steel wire mesh layer; 4. first thermal insulation layer; 5. first glass fiber layer; 6. middle steel pipe; 7. reflection layer; 8. second thermal insulation layer; 9. second glass fiber layer; 10. outer protective steel pipe; 11. anti-corrosion layer; 12. support frame; 13. alumina ceramic block; 14. blocking plate.

[0028] 101. Shell; 102. Gear ring; 103. Connecting tube; 104. Electric push rod; 105. Limiting plate; 106. Guide rod; 107. Gear; 108. Base; 109. Cutting frame; 1010. Electric telescopic rod; 1011. Slide; 1012. Cutting blade; 1013. Head; 1014. Rotating gear; 1015. Gear; 1016. Mounting frame. 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 1-4 An embodiment of the present invention is as follows: an insulation structure of a prefabricated direct-buried insulated pipe, comprising a working inner pipe 1, an outer protective steel pipe 10, a support frame 12 and a blocking plate 14, the outer wall of the working inner pipe 1 is wrapped with a steel mesh layer 3, the outer layer of the steel mesh layer 3 is provided with a first insulation layer 4, the outer wall of the first insulation layer 4 is wrapped with a first glass fiber layer 5, the outer side of the first glass fiber layer 5 is sleeved with a middle layer steel pipe 6, the outer wall of the middle layer steel pipe 6 is wrapped with a reflective layer 7, the outer wall of the reflective layer 7 is provided with a second insulation layer 8, the outer wall of the second insulation layer 8 is wrapped with a second glass fiber layer 9, and the outer side of the second glass fiber layer 9 is sleeved with an outer protective steel pipe 10.

[0031] The steel wire mesh layer 3 wrapped around the outer wall of the working inner pipe 1 improves the bearing capacity and strength of the working inner pipe 1. The first thermal insulation layer 4 arranged on the outer layer of the steel wire mesh layer 3 cooperates with the first glass fiber layer 5 wrapped around the outer wall of the first thermal insulation layer 4 to achieve heat insulation and heat preservation. The middle steel pipe 6 sheathed on the outside of the first glass fiber layer 5 increases the strength of the thermal insulation pipe. The second thermal insulation layer 8 arranged between the middle steel pipe 6 and the outer protective steel pipe 10 cooperates with the reflective layer 7 and the second glass fiber layer 9 to increase the overall strength and thermal insulation effect of the thermal insulation pipe. By arranging two thermal insulation layers and two outer steel pipes, the thermal insulation effect of the thermal insulation pipe and the overall strength of the pipeline are improved.

[0032] A support frame 12 is arranged between the outer protective steel pipe 10 and the working inner pipe 1 , and alumina ceramic blocks 13 are installed at both ends of the support frame 12 . The support frame 12 is provided with multiple groups, and the material of the support frame 12 is metal.

[0033] A plurality of support frames 12 are arranged between the outer protective steel pipe 10 and the working inner pipe 1. The support frames 12 are made of metal and provide support for the insulation pipe. Alumina ceramic blocks 13 are installed at both ends of the support frames 12. The alumina ceramic blocks 13 are made of heat-insulating and hard material and can avoid heat transfer between pipes to ensure insulation effect while providing support strength.

[0034] Blocking plates 14 are installed at both ends of the outer protective steel pipe 10 , and the inner ring of the blocking plate 14 is tightly connected to the outer wall of the working inner pipe 1 .

[0035] By installing blocking plates 14 at both ends of the outer protective steel pipe 10, water can be effectively prevented from entering the insulation layer from both ends, reducing maintenance work and increasing the service life of the insulation pipe.

[0036] An anti-rust layer 2 is provided on the inner wall of the working inner tube 1 .

[0037] The anti-rust layer 2 provided on the inner wall of the working inner tube 1 prevents the inner wall of the working inner tube 1 from being corroded, thereby ensuring the service life of the thermal insulation tube.

[0038] An anti-corrosion layer 11 is provided on the outer wall of the outer protective steel pipe 10 .

[0039] The anti-corrosion layer 11 provided on the outer wall of the outer protective steel pipe 10 can prevent the outer protective steel pipe 10 from rusting, thereby extending the service life of the thermal insulation pipe.

[0040] The first thermal insulation layer 4 and the second thermal insulation layer 8 are made of polyurethane or sponge.

[0041] Working principle: The steel wire mesh layer 3 wrapped around the outer wall of the working inner tube 1 improves the bearing capacity and strength of the working inner tube 1. The first insulation layer 4 arranged on the outer layer of the steel wire mesh layer 3 cooperates with the first glass fiber layer 5 wrapped around the outer wall of the first insulation layer 4 to achieve heat insulation. The middle steel pipe 6 set on the outside of the first glass fiber layer 5 increases the strength of the insulation pipe. The second insulation layer 8 arranged between the middle steel pipe 6 and the outer protective steel pipe 10 cooperates with the reflective layer 7 and the second glass fiber layer 9 to increase the overall strength and insulation effect of the insulation pipe. By setting two insulation layers and two The outer layer of steel pipe improves the insulation effect of the insulation pipe and the overall strength of the pipe. Multiple groups of support frames 12 are arranged between the outer protective steel pipe 10 and the working inner pipe 1. The support frames 12 are made of metal and provide support for the insulation pipe. Alumina ceramic blocks 13 are installed at both ends of the support frames 12. The alumina ceramic blocks 13 are made of heat-insulating and hard materials, which can avoid heat transfer between pipes to ensure insulation effect and provide support strength. Plug plates 14 are installed at both ends of the outer protective steel pipe 10 to effectively prevent water from entering the insulation layer from both ends, reduce maintenance work, and increase the service life of the insulation pipe.

[0042] See also Figure 4-8 A preparation device for a prefabricated direct-buried insulation pipe insulation structure comprises a shell 101, a gear ring 102, and an electric push rod 104. The shell 101 is slidably connected to the gear ring 102. Both sides of the gear ring 102 are installed with electric push rods 104. One end of the electric push rod 104 is fixedly connected to a limit plate 105. The insulation pipe is placed inside the two groups of shells 101. The electric push rod 104 is started to drive the limit plate 105 to clamp and fix the insulation pipe. The bottom of the shell 101 is connected to a base 108. A gear 107 is meshed at the bottom of the ring gear 102, and a rotating motor is installed on one side of the gear 107. The rotating motor is started to drive the gear 107 to rotate, and the gear 107 drives the ring gear 102 to rotate in the shell 101, so that the polyurethane foam inside the insulation pipe is evenly spread in the interlayer of the insulation pipe. The inside of the ring gear 102 is connected to a connecting tube 103, and a guide rod 106 is arranged in the connecting tube 103. One end of the guide rod 106 is fixedly connected to the limit plate 105 to maintain the stability of the limit plate 105 when moving.

[0043] The base 108 is connected to a cutting frame 109, and an electric telescopic rod 1010 is installed on the cutting frame 109. The output end of the electric telescopic rod 1010 is fastened to a cutting blade 1012. The electric telescopic rod 1010 on the cutting frame 109 is started to drive the cutting blade 1012 to move in the slide groove 1011, so that the cutting blade 1012 cuts the polyurethane foam connected to the head 1013, thereby improving the preparation efficiency of the insulation pipe. The two sides of the cutting frame 109 are provided with slide grooves 1011, and the cutting blade 1012 is slidably connected to the cutting blade 1012, so that the cutting blade 1012 maintains a linear motion. A rotating gear 1014 is installed inside the base 108, and the rotating gear 1014 is meshed with teeth 1015. The top of the teeth 1015 is connected to a mounting frame 1016, and a head 1013 is installed on one side of the mounting frame 1016. A sealing gasket is provided on one side of the head 1013. A servo motor is installed on one side of the rotating gear 1014. The servo motor is started to drive the rotating gear 1014 to rotate. The rotating gear 1014 cooperates with the teeth 1015 to move the head 1013, so that the head 1013 blocks one end of the insulation pipe. The sealing gasket improves the sealing performance of the head 1013 during operation. The cutting frame 109 is located between the shell 101 and the head 1013. A notch is opened on one side of the base 108, and a mounting frame 1016 is provided inside the notch. The mounting frame 1016 moves inside the notch.

[0044] Working principle: place the insulation pipe inside the two groups of shells 101, start the electric push rod 104 to drive the limit plate 105 to clamp and fix the insulation pipe, start the servo motor to drive the rotating gear 1014 to rotate, and the rotating gear 1014 cooperates with the teeth 1015 to move the head 1013, so that the head 1013 blocks one end of the insulation pipe. At this time, the polyurethane foam can be transported to the inside of the insulation pipe. During transportation, start the rotating motor to drive the gear 107 to rotate, and the gear 107 drives the gear ring 102 to rotate in the shell 101, so that the polyurethane foam inside the insulation pipe is evenly spread in the interlayer of the insulation pipe. After filling, the polyurethane foam is formed, and the electric telescopic rod 1010 on the cutting frame 109 is started to drive the cutting blade 1012 to move in the slide groove 1011, so that the cutting blade 1012 cuts the polyurethane foam connected to the head 1013, thereby improving the preparation efficiency of the insulation pipe.

[0045] 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 thermal insulation pipe insulation structure, comprising a working inner pipe (1), an outer protective steel pipe (10), a support frame (12) and a blocking plate (14), characterized in that: The outer wall of the working inner tube (1) is wrapped with a steel wire mesh layer (3), the outer layer of the steel wire mesh layer (3) is provided with a first thermal insulation layer (4), the outer wall of the first thermal insulation layer (4) is wrapped with a first glass fiber layer (5), the outer side of the first glass fiber layer (5) is sheathed with a middle layer steel pipe (6), the outer wall of the middle layer steel pipe (6) is sheathed with a reflective layer (7), the outer wall of the reflective layer (7) is provided with a second thermal insulation layer (8), the outer wall of the second thermal insulation layer (8) is sheathed with a second glass fiber layer (9), and the outer side of the second glass fiber layer (9) is sheathed with an outer protective steel pipe (10).

2. The insulation structure of a prefabricated direct-buried insulation pipe according to claim 1 is characterized in that: A support frame (12) is provided between the outer protective steel pipe (10) and the working inner pipe (1), and alumina ceramic blocks (13) are installed at both ends of the support frame (12). The support frame (12) is provided with a plurality of groups, and the material of the support frame (12) is metal.

3. The insulation structure of a prefabricated direct-buried insulation pipe according to claim 1 is characterized in that: Blocking plates (14) are installed at both ends of the outer protective steel pipe (10), and the inner ring of the blocking plate (14) is tightly connected to the outer wall of the working inner pipe (1).

4. The insulation structure of a prefabricated direct-buried insulation pipe according to claim 1 is characterized in that: An anti-rust layer (2) is provided on the inner wall of the working inner tube (1); and an anti-corrosion layer (11) is provided on the outer wall of the outer protective steel tube (10).

5. The insulation structure of a prefabricated direct-buried insulation pipe according to claim 1 is characterized in that: The first thermal insulation layer (4) and the second thermal insulation layer (8) are made of polyurethane or sponge. A preparation device for an insulation structure of a prefabricated direct-buried insulation pipe, using the insulation structure of a prefabricated direct-buried insulation pipe according to claims 1-5, comprising a shell (101), a gear ring (102), and an electric push rod (104), characterized in that: the shell (101) is slidably connected to the inside of the shell (101), the electric push rods (104) are installed on both sides of the inside of the gear ring (102), one end of the electric push rod (104) is fixedly connected to a limit plate (105), and the bottom of the shell (101) is connected to a base (108 ), the base (108) is connected to a cutting frame (109), the cutting frame (109) is mounted with an electric telescopic rod (1010), the output end of the electric telescopic rod (1010) is fastened with a cutting blade (1012), a rotating gear (1014) is mounted inside the base (108), the rotating gear (1014) is meshed with teeth (1015), the top of the teeth (1015) is connected to a mounting frame (1016), and a sealing head (1013) is mounted on one side of the mounting frame (1016).

6. The device for preparing the insulation structure of the prefabricated direct-buried insulation pipe according to claim 6 is characterized in that: A gear (107) is meshed at the bottom of the gear ring (102), and a rotating motor is installed on one side of the gear (107); a connecting tube (103) is connected to the inside of the gear ring (102), a guide rod (106) is arranged in the connecting tube (103), and one end of the guide rod (106) is fixedly connected to a limiting plate (105).

7. The device for preparing the insulation structure of the prefabricated direct-buried insulation pipe according to claim 6 is characterized by: Slide grooves (1011) are provided on both sides of the cutting frame (109), and the cutting blade (1012) is slidably connected to the cutting blade (1012).

8. The device for preparing the insulation structure of the prefabricated direct-buried insulation pipe according to claim 6, characterized in that: A sealing gasket is provided on one side of the sealing head (1013), and a servo motor is installed on one side of the rotating gear (1014).

9. The device for preparing the insulation structure of the prefabricated direct-buried insulation pipe according to claim 6, characterized in that: The cutting frame (109) is located between the shell (101) and the sealing head (1013); a notch is provided on one side of the base (108); and a mounting frame (1016) is provided inside the notch.

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