Directly buried steam heat preservation pipe

Abstract

The application discloses a direct-buried steam heat preservation pipe and relates to the field of steam heat preservation pipes, which comprises a working steel pipe and an outer protective steel pipe. The outer protective steel pipe is sleeved on the outer side of the working steel pipe to form a steel-sheathed steel heat preservation pipe structure. The working steel pipe and the outer side are covered with multiple groups of heat preservation layers, and the outer side of the heat preservation layer is covered with an aluminum foil reflection layer. An abutting joint is arranged at the abutting joint gap between two adjacent groups of heat preservation layers and aluminum foil reflection layers. The application can avoid the gap between multiple groups of heat preservation layers and aluminum foil reflection layers, can drive the heat preservation layer and the aluminum foil reflection layer to be closely covered on the outer side of the working steel pipe, and can effectively avoid heat loss. The application can effectively avoid the sliding deviation of multiple groups of heat preservation layers and aluminum foil reflection layers when being continuously wound on the surface of the working steel pipe, and can guarantee the tightness of the connection of multiple groups of heat preservation layers and aluminum foil reflection layers. Meanwhile, the application can effectively improve the stability of the interlayer structure formed by the outer protective steel pipe and the working steel pipe, and can improve the deformation resistance when the pipe is buried in the ground.

Description

Technical Field

[0001] This invention relates to the field of steam insulation pipes, and particularly to a direct-buried steam insulation pipe. Background Technology

[0002] With the continuous improvement of heating equipment, the installation of heating systems has greatly increased. Steam pipes are a common component in heating systems, serving to seal and transport steam while using insulation to reduce heat loss. The structure of a steam insulation pipe consists of three parts: an outer protective layer, an insulation layer, and a leak-proof layer. The outer protective layer is made of polyethylene jacket pipe, fiberglass, or other materials. Steam insulation pipes are suitable for transporting various media within a temperature range above 150℃. They are widely used in centralized heating and cooling systems, hot oil transportation, and insulation and cold preservation projects in industries such as heated rooms, cold storage, coal mines, petroleum, and chemical plants.

[0003] In existing direct-buried steam insulation pipes, the insulation layer is mostly laid by wrapping it around the outer wall of the pipe. During this process, due to the long length of the pipe, multiple sets of insulation blankets are required, which can easily create gaps between them, further affecting the insulation effect. After the insulation blankets are laid, during the installation of the outer pipe, the outer pipe can rub against the insulation layer, causing compression and misalignment, thus affecting the normal operation of the insulation layer. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a direct-buried steam insulation pipe.

[0005] To achieve the above objectives, this application provides the following technical solution: a direct-buried steam insulation pipe, comprising a working steel pipe and an outer protective steel pipe, wherein the outer protective steel pipe is sleeved on the outside of the working steel pipe to form a steel-clad steel insulation pipe structure, and the outside of the working steel pipe is covered with multiple sets of insulation layers, each of which is covered with an aluminum foil reflective layer.

[0006] A connecting piece is provided at the joint gap between two adjacent sets of the insulation layer and aluminum foil reflective layer. The connecting piece can be used to maintain the relative position of multiple sets of the insulation layer and aluminum foil reflective layer on the outer wall of the working steel pipe. The insulation layer, aluminum foil reflective layer and connecting piece are all located inside the interlayer between the working steel pipe and the outer protective steel pipe.

[0007] Furthermore, the docking component includes a positioning ring that covers the outer side of the aluminum foil reflective layer, and a partition plate is fixed in the inner cavity of the positioning ring. The partition plate extends to the outer side of the gap between the multiple sets of insulation layers and the aluminum foil reflective layer.

[0008] The top of the positioning ring is provided with a pair of docking strips, and a central arm is inserted into the docking strips. The two symmetrical legs of the central arm extend to the bottom of the docking strips, and an extension rod is fixed at the two symmetrical legs of the central arm. The docking strips and the positioning ring together form a space for the extension rod to slide. The central arm is provided with a limiting component that can dock with the insulation layer and the aluminum foil reflective layer.

[0009] Furthermore, the limiting component includes an inner rod, and the surfaces of the insulation layer and the aluminum foil reflective layer are provided with through holes that are adapted to the inner rod. A blocking protrusion is fixedly connected to the top of the inner rod, and two adjacent blocking protrusions are fixed together by a pressing rod.

[0010] Furthermore, the surface of the central arm is rotatably connected to a first linkage arm and a second linkage arm. The first linkage arm and the second linkage arm extend to the left and right sides of the central arm, respectively, and the ends of the first linkage arm and the second linkage arm are rotatably connected to the pressing rod through collars. During the insertion and removal of the pressing rod, the ends of the first linkage arm and the second linkage arm rotate on both sides of the central arm.

[0011] Furthermore, the surface of the positioning ring is provided with a docking channel, the through hole is located directly below the docking channel, and the inner connecting rod passes through the docking channel.

[0012] Furthermore, a guide seat is fixed to the outer surface of the positioning ring. The guide seat is hollow, and multiple balls are rotatably connected to the inner cavity of the guide seat. The balls abut against the inner wall of the outer protective steel pipe.

[0013] Furthermore, a barrier ring is slidably connected between the working steel pipe and the outer protective steel pipe, and multiple cards are fixed on the side of the barrier ring near the opening of the working steel pipe.

[0014] Furthermore, the surface of the positioning ring is fixed with multiple round rods, which are symmetrically distributed on both sides of the central arm. The mating strip is inserted into the round rods, and the top of the round rods is detachably connected to a limit cap.

[0015] Furthermore, the surface of the docking strip is provided with a receiving channel that is adapted to the central arm support leg.

[0016] Furthermore, the insulation layer is made of aluminum silicate.

[0017] In summary, the technical effects and advantages of this invention are as follows:

[0018] This invention avoids gaps between multiple insulation layers and aluminum foil reflective layers, ensuring they tightly cover the outside of the working steel pipe and effectively preventing heat loss. It also effectively prevents slippage and displacement of the insulation layers and aluminum foil reflective layers as they are successively rolled onto the surface of the working steel pipe, guaranteeing a tight connection between them. Simultaneously, it reinforces and supports the steel-cased steel insulation pipe structure formed by the working steel pipe and the outer protective steel pipe, effectively improving the stability of the sandwich structure and enhancing the overall stability of the steel-cased steel structure, thus increasing the pipeline's resistance to deformation when buried underground. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the working steel pipe, insulation layer, aluminum foil reflective layer, and docking parts of the present invention.

[0022] Figure 3 This is a schematic diagram of the connection structure of the working steel pipe, insulation layer and aluminum foil reflective layer of the present invention.

[0023] Figure 4 This is a schematic diagram of the docking component structure of the present invention.

[0024] Figure 5 This is a second-view structural schematic diagram of the docking component of the present invention.

[0025] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0026] Figure 7 This is a schematic diagram of the barrier ring and card structure of the present invention.

[0027] In the diagram: 1. Working steel pipe; 2. Outer protective steel pipe; 3. Insulation layer; 4. Aluminum foil reflective layer; 5. Positioning ring; 6. Separating plate; 7. Connecting strip; 8. Central arm; 9. Extension rod; 10. Inner connecting rod; 11. Barrier protrusion; 12. Pressing rod; 13. First linkage arm; 14. Second linkage arm; 15. Guide seat; 16. Ball bearing; 17. Connecting channel; 18. Limiting cover; 19. Reception channel; 20. Barrier ring; 21. Card. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: Reference Figure 1 , Figure 2 and Figure 3 The example shown is a direct-buried steam insulation pipe, which includes a working steel pipe 1 and an outer protective steel pipe 2. The outer protective steel pipe 2 is sleeved on the outside of the working steel pipe 1 to form a steel-clad steel insulation pipe structure. The working steel pipe 1 is covered with multiple sets of insulation layers 3, and each insulation layer 3 is covered with an aluminum foil reflective layer 4.

[0030] During the use of this direct-buried steam insulation pipe, the steel-cased steel insulation pipe structure formed by the working steel pipe 1 and the outer protective steel pipe 2 can be used for long-distance transportation of high-temperature and low-temperature media, and has good waterproof and heat insulation performance. In areas with high groundwater levels, groundwater does not affect the normal operation of the direct-buried steam pipeline. The insulation layer 3 ensures the heat insulation performance of the entire direct-buried steam insulation pipe, reduces heat loss, and is suitable for transporting various media in the range above 150℃. The aluminum foil reflective layer 4 has flame-retardant, corrosion-resistant, heat-insulating, and sound-absorbing effects. In the process of protecting the insulation layer 3 and the working steel pipe 1, it can reduce the noise when the medium flows inside the working steel pipe 1.

[0031] A connecting piece is provided at the joint gap between two adjacent sets of insulation layers 3 and aluminum foil reflective layers 4. The connecting piece can be used to maintain the relative position of multiple sets of insulation layers 3 and aluminum foil reflective layers 4 on the outer wall of the working steel pipe 1. The insulation layers 3, aluminum foil reflective layers 4 and the connecting piece are all located inside the interlayer between the working steel pipe 1 and the outer protective steel pipe 2.

[0032] like Figure 2 , Figure 4 and Figure 5 As shown, the docking component includes a positioning ring 5, which covers the outside of the aluminum foil reflective layer 4. A partition plate 6 is fixed inside the positioning ring 5. When the insulation layer 3 and the aluminum foil reflective layer 4 cover the outside of the working steel pipe 1, the partition plate 6 extends to the outside of the gaps between the multiple sets of insulation layers 3 and aluminum foil reflective layers 4. Through the combined arrangement of multiple insulation layers 3, aluminum foil reflective layers 4, and the docking component, gaps between the multiple sets of insulation layers 3 and aluminum foil reflective layers 4 can be avoided. This ensures that the insulation layers 3 and aluminum foil reflective layers 4 tightly cover the outside of the working steel pipe 1, effectively preventing heat loss and improving the insulation effect.

[0033] A pair of mating strips 7 are provided at the top of the positioning ring 5. A central arm 8 is inserted into the mating strip 7. Two symmetrical legs of the central arm 8 extend to the bottom of the mating strips 7, and extension rods 9 are fixed to the two symmetrical legs of the central arm 8. The mating strips 7 and the positioning ring 5 together form a space for the extension rods 9 to slide. The central arm 8 is provided with a limiting component that can mate with the insulation layer 3 and the aluminum foil reflective layer 4. During the installation of the outer protective steel pipe 2, the limiting component can effectively prevent the insulation layer 3 and the aluminum foil reflective layer 4 from being squeezed and slipped by the outer protective steel pipe 2, thus ensuring the stability of the insulation layer 3 and the aluminum foil reflective layer 4.

[0034] like Figure 1 , Figure 4 and Figure 5 As shown, the limiting component includes an inner connecting rod 10. The surfaces of the insulation layer 3 and the aluminum foil reflective layer 4 are each provided with through holes adapted to the inner connecting rod 10. The inner connecting rod 10 can be inserted into the inside of the through holes. A blocking protrusion 11 is fixedly connected to the top of the inner connecting rod 10. Two adjacent blocking protrusions 11 are fixed together by a pressing rod 12. The pressing rod 12 can control the synchronous lifting and lowering of a pair of blocking protrusions 11 and the inner connecting rod 10. Furthermore, it can complete the limiting docking of two adjacent insulation layers 3 and aluminum foil reflective layers 4, ensuring that the ends of the insulation layers 3 and aluminum foil reflective layers 4 abut against the separating plate 6. This effectively avoids the phenomenon of sliding and shifting when multiple sets of insulation layers 3 and aluminum foil reflective layers 4 are successively rolled onto the surface of the working steel pipe 1, ensuring the tightness of the connection between multiple sets of insulation layers 3 and aluminum foil reflective layers 4.

[0035] Example 2: As Figure 4 , Figure 5 As shown, the surface of the central arm 8 is rotatably connected to a first linkage arm 13 and a second linkage arm 14. The first linkage arm 13 and the second linkage arm 14 extend to the left and right sides of the central arm 8, respectively. The ends of the first linkage arm 13 and the second linkage arm 14 are rotatably connected to the pressing rod 12 through collars. During the process of inserting and removing the pressing rod 12, the ends of the first linkage arm 13 and the second linkage arm 14 rotate on both sides of the central arm 8.

[0036] By setting a first linkage arm 13 and a second linkage arm 14 to connect the pressing rod 12, and by connecting the first linkage arm 13 and the second linkage arm 14 through a central arm 8, the pressing rod 12, the blocking protrusion 11 and the inner connecting rod 10 can be effectively prevented from falling off.

[0037] The first linkage arm 13, the second linkage arm 14, and the middle arm 8 form a three-point positioning structure. When the outer protective steel pipe 2 is sleeved on the outside of the working steel pipe 1, the top of the middle arm 8 abuts against the inner wall of the outer protective steel pipe 2 to form a support structure. The three-point positioning structure formed by the first linkage arm 13, the second linkage arm 14, and the middle arm 8 has a reinforcing and supporting effect, which can effectively improve the stability of the sandwich structure formed by the outer protective steel pipe 2 and the working steel pipe 1, and also improve the stability of the steel-cased steel structure and enhance the deformation resistance of the pipeline when buried underground.

[0038] like Figure 4 , Figure 5 As shown, the positioning ring 5 has a docking channel 17 on its surface, and a through hole is located directly below the docking channel 17. The inner connecting rod 10 passes through the docking channel 17. The purpose of having the docking channel 17 is to facilitate the operator to pull the positioning ring 5, making manual operation easier and preventing slippage during the pulling process, so as to facilitate the smooth sliding of the positioning ring 5.

[0039] like Figure 4 , Figure 5 As shown, a guide seat 15 is fixed to the outer surface of the positioning ring 5. The guide seat 15 is hollow, and multiple balls 16 are rotatably connected to the inner cavity of the guide seat 15. The balls 16 abut against the inner wall of the outer protective steel pipe 2. When the outer protective steel pipe 2 is sleeved on the outside of the working steel pipe 1, the inner wall of the outer protective steel pipe 2 slides and contacts the balls 16. The purpose of providing the guide seat 15 and the balls 16 is to facilitate the smooth sliding of the outer protective steel pipe 2, reduce the feeling of jamming during the sliding process, and facilitate the operator to smoothly push the outer protective steel pipe 2.

[0040] like Figure 2 , Figure 7 As shown, a barrier ring 20 is slidably connected at the interlayer between the working steel pipe 1 and the outer protective steel pipe 2. Multiple clips 21 are fixed to the side of the barrier ring 20 near the opening of the working steel pipe 1. After multiple sets of insulation layers 3 and aluminum foil reflective layers 4 are rolled up and the outer protective steel pipe 2 is fitted onto its outer side, the barrier ring 20 can be slidably inserted into the interlayer inside the working steel pipe 1 and the outer protective steel pipe 2. The barrier ring 20 keeps the interior of the interlayer sealed, preventing moisture from getting into the insulation layers 3 and aluminum foil reflective layers 4, thus further ensuring the insulation effect of the insulation layer 3 inside the interlayer. The clips 21 are provided to facilitate the sliding of the barrier ring 20, making it easy to install and remove.

[0041] like Figure 4 , Figure 5As shown, multiple round rods are fixed on the surface of the positioning ring 5. The round rods are symmetrically distributed on both sides of the central arm 8. The connecting strip 7 is inserted into the round rods, and the top of the round rods is detachably connected to the limit cover 18. The connecting strip 7 and the positioning ring 5 are detachable. By removing the limit cover 18 located at the top of the round rod, the connecting strip 7 can be separated from the round rod, so as to facilitate the disassembly of the central arm 8 and the components located on both sides of it, which has the advantage of convenient operation.

[0042] The surface of the docking bar 7 is provided with a receiving channel 19 that is adapted to the support leg of the central arm 8. During the installation of the docking bar 7, the receiving channel 19 on the surface of the docking bar 7 can pass through the central arm 8 to complete the docking installation of the docking bar 7 and the round rod, so that the extension rod 9 is located inside the channel formed by the docking bar 7 and the positioning ring 5, which has a limiting effect on the central arm 8.

[0043] like Figure 2 , Figure 3 As shown, the insulation layer 3 is made of aluminum silicate. The insulation blanket supported by aluminum silicate covers the surface of the working steel pipe. Aluminum silicate has good crack resistance, shock resistance and heat preservation performance. In addition, aluminum silicate is a non-combustible material. It can be rapidly cooled and heated within the temperature range without the insulation layer 3 cracking, falling off or burning. It is suitable for the long-term working condition of the steam insulation pipe.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A direct-buried steam insulation pipe, comprising a working steel pipe (1) and an outer protective steel pipe (2), wherein the outer protective steel pipe (2) is sleeved on the outside of the working steel pipe (1) to form a steel-cased steel insulation pipe structure, characterized in that: The working steel pipe (1) is covered with multiple sets of insulation layers (3), and the outer side of each insulation layer (3) is covered with an aluminum foil reflective layer (4). A connecting piece is provided at the joint gap between two adjacent sets of the insulation layer (3) and aluminum foil reflective layer (4). The connecting piece can be used to maintain the relative position of multiple sets of the insulation layer (3) and aluminum foil reflective layer (4) on the outer wall of the working steel pipe (1). The insulation layer (3), aluminum foil reflective layer (4) and connecting piece are all located inside the interlayer between the working steel pipe (1) and the outer protective steel pipe (2). The docking component includes a positioning ring (5), which covers the outside of the aluminum foil reflective layer (4), and a partition plate (6) is fixed in the inner cavity of the positioning ring (5). The partition plate (6) extends to the outside of the gap between the multiple sets of insulation layers (3) and aluminum foil reflective layer (4). The top of the positioning ring (5) is provided with a pair of docking strips (7), and a central arm (8) is inserted into the docking strips (7). The two symmetrical legs of the central arm (8) extend to the bottom of the docking strips (7), and an extension rod (9) is fixed at the two symmetrical legs of the central arm (8). The docking strips (7) and the positioning ring (5) together form a space for the extension rod (9) to slide. The central arm (8) is provided with a limiting member that can dock with the insulation layer (3) and the aluminum foil reflective layer (4). The limiting component includes an inner rod (10). The surfaces of the insulation layer (3) and the aluminum foil reflective layer (4) are provided with through holes that are compatible with the inner rod (10). The top of the inner rod (10) is fixedly connected to a blocking protrusion (11). Two adjacent blocking protrusions (11) are fixed together by a pressing rod (12). The surface of the central arm (8) is rotatably connected to a first linkage arm (13) and a second linkage arm (14). The first linkage arm (13) and the second linkage arm (14) extend to the left and right sides of the central arm (8), respectively. The ends of the first linkage arm (13) and the second linkage arm (14) are rotatably connected to the pressing rod (12) through a collar. During the process of inserting and removing the pressing rod (12), the ends of the first linkage arm (13) and the second linkage arm (14) rotate on both sides of the central arm (8).

2. The direct-buried steam insulation pipe according to claim 1, characterized in that: The positioning ring (5) has a docking channel (17) on its surface, the through hole is located directly below the docking channel (17), and the inner connecting rod (10) passes through the docking channel (17).

3. The direct-buried steam insulation pipe according to claim 1, characterized in that: The outer surface of the positioning ring (5) is fixed with a guide seat (15). The guide seat (15) is hollow and the inner cavity of the guide seat (15) is rotatably connected with multiple balls (16). The balls (16) abut against the inner wall of the outer protective steel pipe (2).

4. The direct-buried steam insulation pipe according to claim 1, characterized in that: A barrier ring (20) is slidably connected between the working steel pipe (1) and the outer protective steel pipe (2). Multiple cards (21) are fixed on the side of the barrier ring (20) near the opening of the working steel pipe (1).

5. The direct-buried steam insulation pipe according to claim 1, characterized in that: The surface of the positioning ring (5) is fixed with multiple round rods, which are symmetrically distributed on both sides of the central arm (8). The connecting strip (7) is inserted into the round rods, and the top of the round rods is detachably connected to the limit cap (18).

6. The direct-buried steam insulation pipe according to claim 1, characterized in that: The surface of the docking bar (7) is provided with a receiving channel (19) that is adapted to the support leg of the central arm (8).

7. The direct-buried steam insulation pipe according to claim 1, characterized in that: The insulation layer (3) is made of aluminum silicate.

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