High-strength modified polyethylene anti-corrosion thermal insulation pipe

Abstract

The utility model discloses a high-strength modified polyethylene anti-corrosion thermal insulation pipe, which relates to the technical field of thermal insulation pipes and comprises a working steel pipe and an outer protective pipe, the outer protective pipe is movably sleeved outside the working steel pipe, the outer wall of the working steel pipe is coated with a polyethylene anti-corrosion layer, and the outer protective pipe is sleeved outside the polyethylene anti-corrosion layer. The outer protection pipe comprises a protection sleeve layer, a high-density polyethylene protection layer and a heat preservation layer. The beneficial effects of the utility model are that: through setting the connection relation of the outer protective pipe, the protective sleeve layer, the high density polyethylene protective layer, the thermal insulation layer, the polyethylene anticorrosive layer and the working steel pipe, dust, grease, dirt and other attachments on the surface of the working steel pipe are removed through the derusting equipment, and then the derusted working steel pipe is coated; the low-temperature modified polyethylene material is creatively used, high-density polyethylene and low-density polyethylene are combined to be processed into the protective layer, and the protective layer has the strength of the high-density polyethylene and the toughness of the low-density polyethylene and has relatively high environmental stress cracking resistance time.

Description

Technical Field

[0001] This utility model relates to the field of thermal insulation pipes, and in particular to a high-strength modified polyethylene anti-corrosion thermal insulation pipe. Background Technology

[0002] Pipeline transportation has become the fifth largest transportation industry in my country. Everyday energy consumption relies on pipelines for transport. Before use, pipelines must undergo anti-corrosion treatment to prevent corrosion and rupture. Damage to long-distance pipelines caused by pipeline breakage can lead to oil and gas leaks, resulting in significant economic losses for the country and its people. Therefore, research into optimizing pipeline anti-corrosion technology and processes is crucial for improving pipeline performance, extending service life, and increasing economic benefits for enterprises, thus preventing anti-corrosion layer failure. However, existing pipelines experience significant heat loss during transport, resulting in a relatively short service life. Therefore, a high-strength modified polyethylene anti-corrosion and heat-insulating pipe is proposed to address these issues. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing pipelines, such as significant heat loss and short service life during transportation, by proposing a high-strength modified polyethylene anti-corrosion and heat-insulating pipe to solve these problems.

[0004] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0005] A high-strength modified polyethylene anti-corrosion and heat-insulating pipe, comprising:

[0006] The system comprises a working steel pipe and an outer protective pipe, with the outer protective pipe movably sleeved outside the working steel pipe. The outer wall of the working steel pipe is coated with a polyethylene anti-corrosion layer, and the outer protective pipe is sleeved outside the polyethylene anti-corrosion layer. The outer protective pipe includes a protective sleeve layer, a high-density polyethylene protective layer, and an insulation layer. The insulation layer is made of rubber-plastic foam insulation material and is fixedly attached between the polyethylene anti-corrosion layer and the high-density polyethylene protective layer. The protective sleeve layer is movably sleeved outside the high-density polyethylene protective layer.

[0007] Preferably, the outer wall of the working steel pipe is movably fitted with a side-sealing sleeve, and the side-sealing sleeve has an inner edge fixedly provided inside, which is movably inserted into the inner cavity of the working steel pipe.

[0008] Preferably, the outer wall of the working steel pipe is provided with a steel pipe insertion hole, the outer wall of the side sealing sleeve is provided with a first connecting hole, the outer wall of the side sealing sleeve is provided with a first connecting rod, and one end of the first connecting rod passes through the steel pipe insertion hole and the first connecting hole, and the outer wall of the first connecting rod is threaded with a corresponding nut seat.

[0009] Preferably, a connecting sleeve is movably sleeved on the outer wall of the outer protective tube, a second connecting hole is provided on the outer wall of the connecting sleeve, an outer tube insertion hole is provided on the outer wall of the outer protective tube, the center lines of the outer tube insertion hole and the second connecting hole coincide, and a second connecting rod is inserted through the outer tube insertion hole and the second connecting hole.

[0010] Preferably, an extension sleeve is fixedly provided on the outer wall of the connecting sleeve, and one end of the side-sealing sleeve is movably inserted into the extension sleeve.

[0011] Preferably, the outer wall of the extension sleeve is provided with a sliding groove, and the outer wall of the side-sealed sleeve is fixedly provided with a slider, and the outer end of the slider is movably engaged in the sliding groove.

[0012] Preferably, a connecting block is fixedly provided on the outer wall of the slider, and a circular hole is opened on the outer wall of the connecting block, and a positioning screw is movably inserted into the inner wall of the circular hole.

[0013] Preferably, the outer wall of the extension sleeve is provided with positioning holes, and multiple sets of positioning holes are provided, with one end of the positioning screw being threaded into the corresponding positioning hole.

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

[0015] 1. In this utility model, by setting up the connection relationship between the outer protective pipe, the protective sleeve layer, the high-density polyethylene protective layer, the insulation layer, the polyethylene anti-corrosion layer, and the working steel pipe, dust, grease, and dirt on the surface of the working steel pipe can be removed by rust removal equipment. The rust-removed working steel pipe is then coated. Through the innovative use of low-temperature modified polyethylene material, high-density and low-density polyethylene are combined to form a protective layer, possessing both the strength of high-density polyethylene and the toughness of low-density polyethylene. It has strong resistance to environmental stress cracking and employs a secondary melting process. The process involves first melting polyethylene, thermosensitive resin, elastomer, and initiator, followed by a second melting with the addition of antioxidants, UV absorbers, and silanes. After compounding and extrusion, a cross-linking reaction occurs. Compared to traditional materials, the tensile strength can reach over 21 MPa, and the resistance to environmental stress cracking can be improved by over 30%. This process addresses the issue of traditional materials exhibiting strong brittleness at low temperatures, which easily leads to quality problems. It improves product quality, extends service life, and ensures safe material transport. Furthermore, the outer protective tube insulates the working steel pipe, promoting its use in low-temperature environments.

[0016] 2. In this utility model, by setting the connection relationship of the side sealing sleeve, the connecting sleeve, and the extension sleeve, the side sealing sleeve, the connecting sleeve, and the extension sleeve are wrapped and fitted around the edges of the outer protective pipe and the working steel pipe, thus protecting the edges of the outer protective pipe and the working steel pipe, ensuring the integrity and performance of the outer protective pipe and the working steel pipe, and preventing damage to the outer protective pipe and the working steel pipe due to friction, scratches, or impacts during transportation, installation, and use. Furthermore, by fitting the side sealing sleeve, the connecting sleeve, and the extension sleeve around the outer protective pipe and the working steel pipe, the gap between the outer protective pipe and the working steel pipe is blocked and sealed, which facilitates the insulation effect between the outer protective pipe and the working steel pipe and reduces heat loss. Moreover, by pulling the side sealing sleeve, the slider can be moved, which facilitates the self-adjustment of the side sealing sleeve's position and improves its adaptability to use. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the dispersed structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the radial cross-section structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the side-sealed sleeve structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the connecting sleeve structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the slide groove structure of this utility model.

[0025] The numbers in the diagram are as follows: 1. Outer protective tube; 101. Outer tube insertion hole; 1011. Protective sleeve layer; 1012. High-density polyethylene protective layer; 1013. Insulation layer; 1014. Polyethylene anti-corrosion layer; 2. Working steel pipe; 201. Steel pipe insertion hole; 3. Side sealing sleeve; 301. Inner edge; 302. First connecting hole; 303. First connecting rod; 304. Sliding block; 305. Connecting block; 306. Positioning screw; 4. Connecting sleeve; 401. Second connecting hole; 402. Second connecting rod; 403. Extension sleeve; 404. Slide groove; 405. Positioning hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example: This example provides a high-strength modified polyethylene anti-corrosion and heat-insulating pipe. See [link / reference]. Figure 1-6 Specifically, including:

[0028] The system consists of a working steel pipe 2 and an outer protective pipe 1, with the outer protective pipe 1 movably fitted over the working steel pipe 2. The outer wall of the working steel pipe 2 is coated with a polyethylene anti-corrosion layer 1014. Dust, grease, and dirt are removed from the surface of the working steel pipe 2 using rust removal equipment. The rust-removed working steel pipe 2 is then coated with the polyethylene anti-corrosion layer 1014. The outer protective pipe 1 is fitted over the polyethylene anti-corrosion layer 1014 and includes a protective sleeve layer 1011, a high-density polyethylene protective layer 1012, and an insulation layer 1013. The insulation layer 1013 is made of rubber-plastic foam insulation material and is fixedly attached between the polyethylene anti-corrosion layer 1014 and the high-density polyethylene protective layer 1012. The protective sleeve layer 1011 is movably fitted over the high-density polyethylene protective layer. In addition to 1012, by innovatively using low-temperature modified polyethylene materials, high-density and low-density polyethylene are combined to form a protective layer. This layer combines the strength of high-density polyethylene with the toughness of low-density polyethylene, exhibiting strong resistance to environmental stress cracking. Furthermore, a two-stage melting process is employed, where polyethylene, thermosensitive resin, elastomer, and initiator are melted once, and then antioxidants, UV absorbers, and silanes are added for a second melting. After compounding and extrusion, a cross-linking reaction occurs. Compared to traditional materials, the tensile strength can reach over 21 MPa, and the resistance to environmental stress cracking can be improved by more than 30%. This addresses the issue of traditional materials exhibiting strong brittleness at low temperatures, which easily leads to quality problems, thereby improving product quality, extending service life, and ensuring safe material transportation.

[0029] The outer wall of the working steel pipe 2 is movably fitted with a side sealing sleeve 3, and the inside of the side sealing sleeve 3 is fixedly provided with an inner edge 301, which is movably inserted into the inner cavity of the working steel pipe 2 to wrap and protect the edge of the working steel pipe 2, ensuring the integrity and performance of the steel pipe, and preventing the steel pipe from being damaged by friction, scratches or impacts during transportation, installation and use.

[0030] The outer wall of the working steel pipe 2 has a steel pipe insertion hole 201, and the outer wall of the side sealing sleeve 3 has a first connecting hole 302. The outer wall of the side sealing sleeve 3 is provided with a first connecting rod 303, and one end of the first connecting rod 303 passes through the steel pipe insertion hole 201 and the first connecting hole 302. The outer wall of the first connecting rod 303 is threaded with a corresponding nut seat. By passing the first connecting rod 303 through the first connecting hole 302 and the steel pipe insertion hole 201, and then tightening the nut seat on the first connecting rod 303, the side sealing sleeve 3 is installed and fixed on the working steel pipe 2.

[0031] A connecting sleeve 4 is movably sleeved on the outer wall of the outer protective tube 1, which serves to wrap and protect the outer wall of the outer protective tube 1. A second connecting hole 401 is opened on the outer wall of the connecting sleeve 4, and an outer tube insertion hole 101 is opened on the outer wall of the outer protective tube 1. The center lines of the outer tube insertion hole 101 and the second connecting hole 401 coincide, and a second connecting rod 402 is inserted through the outer tube insertion hole 101 and the second connecting hole 401. In use, by passing the second connecting rod 402 through the outer tube insertion hole 101 and the second connecting hole 401, and tightening the nut seat on the outer wall of the second connecting rod 402, the connecting sleeve 4 is fixed on the outer protective tube 1, thus protecting the edge of the outer protective tube 1.

[0032] An extension sleeve 403 is fixedly installed on the outer wall of the connecting sleeve 4. One end of the side sealing sleeve 3 is movably inserted into the extension sleeve 403. The side sealing sleeve 3, the connecting sleeve 4, and the extension sleeve 403 are fitted over the outer protective pipe 1 and the working steel pipe 2, blocking and sealing the gap between the outer protective pipe 1 and the working steel pipe 2, which helps to improve the insulation effect between the outer protective pipe 1 and the working steel pipe 2 and reduce heat loss.

[0033] The outer wall of the extension sleeve 403 is provided with a sliding groove 404, and the outer wall of the side-sealing sleeve 3 is fixedly provided with a slider 304, and the outer end of the slider 304 is movably engaged in the sliding groove 404. The slider 304 restricts the sliding within the sliding groove 404, thereby limiting the range of movement of the side-sealing sleeve 3. This makes it easy to adjust the use according to the length difference between the outer protective tube 1 and the working steel tube 2, thus improving its applicability.

[0034] A connecting block 305 is fixedly installed on the outer wall of the slider 304. A circular hole is opened on the outer wall of the connecting block 305, and a positioning screw 306 is movably inserted into the inner wall of the circular hole. A positioning hole 405 is opened on the outer wall of the extension sleeve 403, and multiple sets of positioning holes 405 are provided. One end of the positioning screw 306 is threaded into the corresponding positioning hole 405. When the side sealing sleeve 3 moves to the corresponding position, the circular hole on the connecting block 305 is aligned with the corresponding positioning hole 405. The positioning screw 306 passes through the circular hole and is inserted into the corresponding positioning hole 405. By rotating the positioning screw 306, the positioning screw 306 is tightened in the positioning hole 405, thereby fixing the position of the slider 304, and thus fixing the position of the side sealing sleeve 3. This further improves the stability between the side sealing sleeve 3 and the connecting sleeve 4, and facilitates the extension of the position between the side sealing sleeve 3 and the connecting sleeve 4 according to subsequent installation needs.

[0035] Specifically, the working principle and operation method of this utility model are as follows:

[0036] The surface of the working steel pipe 2 is cleaned of dust, grease, and dirt using rust removal equipment. After rust removal, the working steel pipe 2 is coated with a polyethylene anti-corrosion layer 1014. The outer protective pipe 1 is fitted over the polyethylene anti-corrosion layer 1014. Through the innovative use of low-temperature modified polyethylene material, high-density and low-density polyethylene are combined to form a protective layer that combines the strength of high-density polyethylene with the toughness of low-density polyethylene, exhibiting strong resistance to environmental stress cracking. Furthermore, a two-stage melting process is employed, melting polyethylene, heat-sensitive resin, elastomer, and initiator in one step, followed by the addition of antioxidants and UV stabilizers. The absorbent and silane and other additives are melted twice, and cross-linking reaction occurs after compounding and extrusion. Compared with traditional materials, the tensile strength can reach more than 21 MPa, and the environmental stress cracking resistance can be improved by more than 30%. It improves the phenomenon that traditional materials are highly brittle in low-temperature environments and are prone to quality problems, improves product quality, extends service life and ensures safe material transportation. The outer protective pipe 1 includes a protective sleeve layer 1011, a high-density polyethylene protective layer 1012 and a heat insulation layer 1013. The heat insulation layer 1013 is made of rubber and plastic foam insulation material, which wraps and insulates the working steel pipe 2 to promote use in low-temperature environments.

[0037] In use, the side-sealing sleeve 3 is fitted onto the edge of the working steel pipe 2, the first connecting rod 303 is passed through the first connecting hole 302 and the steel pipe insertion hole 201, and the nut seat sleeve is tightened onto the first connecting rod 303, thus fixing the side-sealing sleeve 3 onto the working steel pipe 2. The connecting sleeve 4 is fitted onto the edge of the outer protective pipe 1. The second connecting rod 402 is passed through the outer pipe insertion hole 101 and the second connecting hole 401, and the nut seat is tightened onto the outer wall of the second connecting rod 402, thus fixing the connecting sleeve 4 onto the outer protective pipe 1. This provides protection for the edges of the outer protective pipe 1 and the working steel pipe 2, ensuring the integrity and performance of the outer protective pipe 1 and the working steel pipe 2, and preventing damage to the outer protective pipe 1 and the working steel pipe 2 due to friction, scratches, or impacts during transportation, installation, and use. The side-sealing sleeve 3, the connecting sleeve 4, and the extension sleeve 403 are fitted onto the outer protective pipe 1 and the working steel pipe 2. The gap between the outer protective tube 1 and the working steel tube 2 is sealed to improve the insulation effect between the outer protective tube 1 and the working steel tube 2 and reduce heat loss. In use, the side sealing sleeve 3 is pulled to move the slider 304, which can be adjusted to improve the use position of the side sealing sleeve 3 and improve the adaptability of use. When the side sealing sleeve 3 moves to the corresponding position, the round hole on the connecting block 305 is aligned with the corresponding positioning hole 405. The positioning screw 306 passes through the round hole and is inserted into the corresponding positioning hole 405. By rotating the positioning screw 306, the positioning screw 306 is tightened in the positioning hole 405, thereby fixing the position of the slider 304 and fixing the position of the side sealing sleeve 3. This further improves the stability between the side sealing sleeve 3 and the connecting sleeve 4 and makes it convenient to extend the position between the side sealing sleeve 3 and the connecting sleeve 4 according to the installation needs.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-strength modified polyethylene anti-corrosion and heat-insulating pipe, comprising a working steel pipe (2) and an outer protective pipe (1), wherein the outer protective pipe (1) is movably sleeved outside the working steel pipe (2), characterized in that: The outer wall of the working steel pipe (2) is coated with a polyethylene anti-corrosion layer (1014). The outer protective pipe (1) is sleeved on the polyethylene anti-corrosion layer (1014). The outer protective pipe (1) includes a protective sleeve layer (1011), a high-density polyethylene protective layer (1012), and a heat insulation layer (1013). The heat insulation layer (1013) is made of rubber and plastic foam insulation material. The heat insulation layer (1013) is fixedly attached between the polyethylene anti-corrosion layer (1014) and the high-density polyethylene protective layer (1012). The protective sleeve layer (1011) is movably sleeved on the outside of the high-density polyethylene protective layer (1012).

2. The high-strength modified polyethylene anticorrosive and heat-insulating pipe according to claim 1, characterized in that: The outer wall of the working steel pipe (2) is movably fitted with a side-sealing sleeve (3), and the inside of the side-sealing sleeve (3) is fixedly provided with an inner edge (301), which is movably inserted into the inner cavity of the working steel pipe (2).

3. The high-strength modified polyethylene anticorrosive and heat-insulating pipe according to claim 2, characterized in that: The outer wall of the working steel pipe (2) is provided with a steel pipe insertion hole (201), the outer wall of the side-sealing sleeve (3) is provided with a first connecting hole (302), the outer wall of the side-sealing sleeve (3) is provided with a first connecting rod (303), and one end of the first connecting rod (303) passes through the steel pipe insertion hole (201) and the first connecting hole (302). The outer wall of the first connecting rod (303) is threaded with a corresponding nut seat.

4. The high-strength modified polyethylene anticorrosive and heat-insulating pipe according to claim 3, characterized in that: The outer protective tube (1) is movably sleeved with a connecting sleeve (4), the outer wall of the connecting sleeve (4) is provided with a second connecting hole (401), the outer wall of the outer protective tube (1) is provided with an outer tube insertion hole (101), the center lines of the outer tube insertion hole (101) and the second connecting hole (401) coincide, and a second connecting rod (402) is inserted through the outer tube insertion hole (101) and the second connecting hole (401).

5. The high-strength modified polyethylene anti-corrosion and heat-insulating pipe according to claim 4, characterized in that: An extension sleeve (403) is fixedly provided on the outer wall of the connecting sleeve (4), and one end of the side-sealing sleeve (3) is movably inserted into the extension sleeve (403).

6. The high-strength modified polyethylene anticorrosive and heat-insulating pipe according to claim 5, characterized in that: The outer wall of the extension sleeve (403) is provided with a sliding groove (404), and the outer wall of the side-sealed sleeve (3) is fixedly provided with a slider (304), and the outer end of the slider (304) is movably engaged in the sliding groove (404).

7. The high-strength modified polyethylene anticorrosive and heat-insulating pipe according to claim 6, characterized in that: A connecting block (305) is fixedly provided on the outer wall of the slider (304). A circular hole is provided on the outer wall of the connecting block (305), and a positioning screw (306) is movably inserted into the inner wall of the circular hole.

8. The high-strength modified polyethylene anticorrosive and heat-insulating pipe according to claim 7, characterized in that: The outer wall of the extension sleeve (403) is provided with positioning holes (405), and multiple sets of positioning holes (405) are provided. One end of the positioning screw (306) is threaded into the corresponding positioning hole (405).

Images