Polyurethane insulated steel pipe

Abstract

The utility model belongs to the technical field of heat -preserving steel pipe, and disclose a kind of polyurethane heat -preserving steel pipe, including steel pipe body, two steel pipe bodies are equipped, the outer surface of two steel pipe bodies is all sleeved with the protective layer of polyethylene material, the protective layer is filled with the heat -preserving layer of polyurethane foam material between steel pipe body, the connecting place of two steel pipe bodies is jointly sleeved with heat -preserving pipe one and heat -preserving pipe two, the outer surface of heat -preserving pipe one is fixedly connected with two connecting plates one, the utility model is connected with the cooperation of connecting plate one, connecting plate two and quick release rod by being set quick release assembly, the quick disassembly and reuse of pipeline connecting place are realized, and mechanical locking structure is formed by inserting rod, push block and push rod in quick release assembly, when overhauling, push block is pressed to compress reset spring, so that push rod is separated from rod groove, and heat -preserving pipe can be separated, without damaging overall heat -preserving layer, greatly improve installation efficiency, reduce operation and maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of thermal insulation steel pipe technology, specifically a polyurethane thermal insulation steel pipe. Background Technology

[0002] Polyurethane insulated steel pipes are steel pipes that have undergone insulation processing to ensure that the internal temperature and surface temperature of the working steel pipe meet or reach the required usage temperature under different working environments and external media. Insulated pipes are widely used in liquid and gas transmission networks, chemical pipeline insulation projects, petroleum, chemical, district heating networks, central air conditioning ventilation ducts, municipal engineering, etc.

[0003] Meanwhile, the patent specification with application number CN208153966U discloses a polyurethane insulated steel pipe, "including a working steel pipe, both ends of which extend to the outside of a polyethylene protective pipe. Hollow collars are fitted on both ends of the working steel pipe. Cotton cloth rings with their inner edges in contact with the outer edges of the working steel pipe are fixedly installed on the inner edges of the collars. Multiple water outlet holes are evenly distributed on the inner edges of the collars. A water injection pipe communicating with the inside of the collars is installed on the outer edges of the collars. Multiple fixing plates that contact the outer edges of the polyethylene protective pipe are fixedly installed on the side of the collars facing the end face of the polyethylene protective pipe. The fixing plates are connected to the polyethylene protective pipe by bolts."

[0004] In the use of existing polyurethane insulated steel pipes, the pipe connections mostly adopt an integral insulation structure. The integral insulation layer can only be disassembled after being damaged during maintenance, resulting in the need for reconstruction after maintenance, which is costly and inefficient. Secondly, the traditional structure does not have a three-layer composite design of anti-corrosion layer, protective layer and insulation layer. It relies on a single structure to achieve the insulation function, which is insufficient in complex environments. Especially in environments with large temperature differences, a single structure cannot meet the multiple requirements of anti-corrosion, protection and insulation at the same time.

[0005] Therefore, a polyurethane insulated steel pipe is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a polyurethane insulated steel pipe, which has the advantages of significantly improving installation efficiency, reducing operation and maintenance costs, and significantly improving the corrosion resistance, impact resistance, and insulation reliability of the steel pipe.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a polyurethane insulated steel pipe, comprising a steel pipe body, wherein two steel pipe bodies are provided, and the outer surfaces of both steel pipe bodies are fitted with a protective layer of polyethylene material. A polyurethane foam insulation layer is filled between the protective layer and the steel pipe body. Insulation pipe one and insulation pipe two are fitted together at the connection of the two steel pipe bodies. Two connecting plates one are fixedly connected to the outer surface of insulation pipe one, and two connecting plates two are fixedly connected to the outer surface of insulation pipe two. Correspondingly, connecting plates one and connecting plates two are provided with quick-release components.

[0008] Preferably, the outer surfaces of both steel pipe bodies are coated with an anti-corrosion coating.

[0009] Preferably, both the first insulation pipe and the second insulation pipe are semi-circular.

[0010] Preferably, the quick-release assembly includes two quick-release rods. One end of both the first connecting plate and the second connecting plate is provided with a circular groove for use with the two quick-release rods. Insert rods are movably inserted into the inner surfaces of the two quick-release rods. Push blocks are fixedly connected to one end of each of the two insert rods located inside the quick-release rods. Four push rods are slidably connected to the outer surfaces of the two push blocks. The inner surfaces of the two circular grooves on the second connecting plate are provided with rod grooves for use with the four push rods. The four push rods pass through the corresponding quick-release rods and extend into the corresponding rod grooves. Return springs are fixedly connected to the bottom ends of the two push blocks. The bottom ends of the two return springs are fixedly connected to the lower inner walls of the two quick-release rods, respectively.

[0011] Preferably, the top of each of the two quick-release levers is provided with an anti-accidental contact groove, and the top of each of the two anti-accidental contact grooves is connected with a sealing cap by an interference fit. Both sealing caps are made of rubber.

[0012] Preferably, both push blocks are frustum-shaped, and four limiting grooves are provided on the outer surface of both push blocks. One end of each push rod is fixedly connected to a limiting block that cooperates with the limiting groove.

[0013] Preferably, the outer surfaces of the two push blocks are fixedly connected to two sliders, and the inner surfaces of the two quick-release rods are provided with grooves that cooperate with the two sliders.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting up a quick-release assembly, achieves rapid disassembly and reuse of pipe connections through the cooperation of connecting plate one, connecting plate two, and quick-release rod. The quick-release assembly forms a mechanical locking structure through the insertion rod, push block, and push rod. During maintenance, pressing the push block compresses the reset spring, causing the push rod to disengage from the rod groove, thus separating the insulation pipe without damaging the overall insulation layer, greatly improving installation efficiency and reducing maintenance costs.

[0016] 2. This utility model adopts a three-layer composite structure design of anti-corrosion coating, protective layer and heat insulation layer. Under the synergistic effect of each layer, the anti-corrosion coating on the outer surface of the steel pipe body provides a chemical barrier, the polyethylene protective layer forms a physical protective layer, and the polyurethane foam insulation layer is tightly filled between the protective layer and the steel pipe body to achieve efficient heat insulation. This allows the steel pipe body to maintain stable performance in complex environments, significantly improving the corrosion resistance, impact resistance and heat insulation reliability of the steel pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 3 This utility model Figure 1 Enlarged schematic diagram of the structure at point B;

[0020] Figure 4 This is a schematic diagram showing the structural disassembly of insulation pipe one and insulation pipe two of this utility model;

[0021] Figure 5 This is a cross-sectional view of the quick-release rod and a schematic diagram showing the disassembly of the quick-release rod and the sealing cover structure of this utility model;

[0022] Figure 6 This is a schematic diagram showing the disassembled push block and push rod structure of this utility model.

[0023] In the diagram: 1. Protective layer; 2. Insulation layer; 3. Steel pipe body; 4. Anti-corrosion coating; 5. Insulation pipe one; 6. Insulation pipe two; 7. Connecting plate one; 8. Connecting plate two;

[0024] 9. Quick-release assembly; 91. Quick-release lever; 92. Circular groove; 93. Lever groove; 94. Insert lever;

[0025] 95. Push block; 951. Push rod; 952. Slider; 953. Limiting block; 954. Limiting groove;

[0026] 96. Return spring; 97. Slide groove; 98. Anti-accidental contact groove; 99. Sealing cover. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 6 As shown, this utility model provides a polyurethane insulated steel pipe, including a steel pipe body 3, of which two steel pipe bodies 3 are provided. The outer surface of each steel pipe body 3 is covered with a polyethylene protective layer 1. A polyurethane foam insulation layer 2 is filled between the protective layer 1 and the steel pipe body 3. Through the layered design of the protective layer 1 and the insulation layer 2, the polyethylene protective layer 1 can resist external impact, and the polyurethane insulation layer 2 can achieve efficient heat insulation. The combination of the two gives the steel pipe excellent protection and heat insulation performance. The connection between the two steel pipe bodies 3 is jointly covered with an insulation pipe 1 5 and an insulation pipe 2 6. The outer surface of the insulation pipe 1 5 is fixedly connected with two connecting plates 1 7, and the outer surface of the insulation pipe 2 6 is fixedly connected with two connecting plates 2 8. The corresponding connecting plates 1 7 and connecting plates 2 8 are provided with quick-release components 9.

[0029] Specifically, the outer surfaces of both steel pipe bodies 3 are coated with an anti-corrosion coating 4. The anti-corrosion coating 4 can effectively prevent the steel pipe body 3 from contacting external corrosive media, improve the corrosion resistance of the steel pipe, and extend its service life.

[0030] like Figures 1 to 6 As shown, both the insulation pipe 5 and the insulation pipe 6 are semi-circular. The semi-circular structure of the insulation pipe 5 and the insulation pipe 6 facilitates the formation of a complete annular insulation layer 2 at the pipe connection, and is easy to disassemble and install, meeting maintenance needs.

[0031] Furthermore, the quick-release assembly 9 includes two quick-release levers 91. One end of both the connecting plate 7 and the connecting plate 8 has a circular groove 92 that mates with the two quick-release levers 91. Insert rods 94 are movably inserted into the inner surfaces of both quick-release levers 91. Push blocks 95 are fixedly connected to one end of each of the two insert rods 94 located within the quick-release lever 91. Four push rods 951 are slidably connected to the outer surfaces of both push blocks 95. The inner surfaces of the two circular grooves 92 on the connecting plate 8 are each provided with a groove that mates with the four push rods 951. The rod groove 93 has four push rods 951 that pass through the corresponding quick-release rods 91 and extend into the corresponding rod groove 93. The bottom ends of the two push blocks 95 are fixedly connected to the return springs 96. The bottom ends of the two return springs 96 are fixedly connected to the lower inner walls of the two quick-release rods 91, which realizes the quick locking and separation of the connecting plate 1 7 and the connecting plate 2 8. Through the cooperation of the push blocks 95, push rods 951 and rod groove 93, the disassembly and assembly of the insulation pipe 1 5 and the insulation pipe 2 6 can be completed conveniently, improving the construction and maintenance efficiency.

[0032] like Figures 1 to 6 As shown, the top of each of the two quick-release levers 91 is provided with an anti-accidental contact groove 98. The top of each of the two anti-accidental contact grooves 98 is connected to a sealing cover 99 by an interference fit. Both sealing covers 99 are made of rubber. The anti-accidental contact grooves 98 and sealing covers 99 can prevent the quick-release assembly 9 from being accidentally operated due to contact. At the same time, the sealing covers 99 can effectively prevent dust and moisture from entering the quick-release levers 91, ensuring the stable operation of the quick-release assembly 9.

[0033] It is worth noting that both push blocks 95 are frustum-shaped, and four limiting grooves 954 are provided on the outer surface of both push blocks 95. One end of each push rod 951 is fixedly connected to a limiting block 953 that works in conjunction with the limiting groove 954. The cooperation between the frustum-shaped push block 95, the limiting groove 954, and the limiting block 953 can limit the movement trajectory of the push rod 951, ensuring that the push rod 951 is accurately inserted into the rod groove 93 and improving the reliability of the quick-release assembly 9 locking.

[0034] like Figures 1 to 6 As shown, two sliders 952 are fixedly connected to the outer surfaces of the two push blocks 95. The inner surfaces of the two quick-release rods 91 are provided with grooves 97 that cooperate with the two sliders 952. The cooperation between the sliders 952 and the grooves 97 provides guidance for the movement of the push blocks 95, so that the push blocks 95 can slide smoothly in the quick-release rods 91, ensuring the smooth operation of the quick-release assembly 9.

[0035] Working principle and process: When the two steel pipe bodies 3 are connected, the insulation pipe 1 5 and the insulation pipe 2 6 are respectively sleeved on the connection point, so that the connecting plate 1 7 and the connecting plate 2 8 are aligned. Press the insertion rod 94, and the insertion rod 94 drives the push block 95 to move downward. Under the action of the limiting block 953 and the limiting groove 954, the push rod 951 can be retracted into the quick release rod 91. Then the quick release rod 91 can be inserted into the circular groove 92 of the connecting plate 1 7 and the connecting plate 2 8.

[0036] Once the quick-release lever 91 reaches the appropriate position, release the insertion lever 94. Under the elastic force of the spring, the push block 95 rises, allowing the push block 95 to move the push rod 951 out of the quick-release lever 91 and insert it into the rod groove 93. This locks the insulation pipe 1 5 and the insulation pipe 2 6 together, thus completing the insulation and fixing at the connection of the two steel pipe bodies 3. Throughout the process, the anti-corrosion coating 4, the protective layer 1, and the insulation layer 2 play the roles of anti-corrosion, protection, and insulation, respectively. All components work together to ensure the normal use of the polyurethane insulated steel pipe.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polyurethane insulated steel pipe, comprising a steel pipe body (3), characterized in that: Two steel pipe bodies (3) are provided. The outer surfaces of the two steel pipe bodies (3) are covered with a protective layer (1) made of polyethylene material. A polyurethane foam insulation layer (2) is filled between the protective layer (1) and the steel pipe body (3). The connection between the two steel pipe bodies (3) is covered with a first insulation pipe (5) and a second insulation pipe (6). The outer surface of the first insulation pipe (5) is fixedly connected with two first connecting plates (7). The outer surface of the second insulation pipe (6) is fixedly connected with two second connecting plates (8). The first connecting plate (7) and the second connecting plate (8) are provided with quick-release components (9).

2. The polyurethane insulated steel pipe according to claim 1, characterized in that: The outer surfaces of both steel pipe bodies (3) are coated with an anti-corrosion coating (4).

3. The polyurethane insulated steel pipe according to claim 1, characterized in that: Both the first insulation pipe (5) and the second insulation pipe (6) are semi-circular.

4. The polyurethane insulated steel pipe according to claim 1, characterized in that: The quick-release assembly (9) includes two quick-release rods (91). One end of both the connecting plate one (7) and the connecting plate two (8) has a circular groove (92) for use with the two quick-release rods (91). Insert rods (94) are movably inserted into the inner surfaces of both quick-release rods (91). Push blocks (95) are fixedly connected to one end of each of the two insert rods (94) located within the quick-release rods (91). Four push rods are slidably connected to the outer surfaces of both push blocks (95). 951), the inner surfaces of the two circular grooves (92) on the connecting plate 2 (8) are provided with rod grooves (93) for use with the four push rods (951). The four push rods (951) pass through the corresponding quick release rods (91) and extend into the corresponding rod grooves (93). The bottom ends of the two push blocks (95) are fixedly connected with return springs (96). The bottom ends of the two return springs (96) are fixedly connected to the lower inner walls of the two quick release rods (91).

5. A polyurethane insulated steel pipe according to claim 4, characterized in that: Both quick-release levers (91) have anti-accidental contact grooves (98) at their top ends, and both anti-accidental contact grooves (98) are connected to sealing caps (99) by interference fit at their top ends. Both sealing caps (99) are made of rubber.

6. A polyurethane insulated steel pipe according to claim 4, characterized in that: Both push blocks (95) are frustum-shaped, and four limiting grooves (954) are provided on the outer surface of both push blocks (95). One end of each push rod (951) is fixedly connected to a limiting block (953) that is used in conjunction with the limiting groove (954).

7. A polyurethane insulated steel pipe according to claim 4, characterized in that: Two sliders (952) are fixedly connected to the outer surfaces of the two push blocks (95), and the inner surfaces of the two quick release rods (91) are provided with grooves (97) that cooperate with the two sliders (952).

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