Electric plastic-coated steel pipe with good insulation effect

Abstract

The utility model discloses an electric power plastic-coated steel pipe with a good insulation effect, which relates to the technical field of plastic-coated steel pipes and comprises two steel pipe main bodies, the two steel pipe main bodies are connected through an insulation connecting piece, the insulation connecting piece is communicated with the two steel pipe main bodies, and insulation sleeve pieces are sleeved outside the steel pipe main bodies. The insulating sleeve piece is connected with the steel pipe main body through a plurality of metal fixing pieces, and a plastic coating layer is arranged outside the steel pipe main body; the plastic-coated layer arranged outside the steel pipe main body is used for primarily insulating a power cable in the steel pipe main body, the plastic insulating sleeve is sleeved outside the steel pipe main body so as to provide additional insulating protection, and meanwhile, an air insulating cavity is formed between the plastic insulating sleeve and the steel pipe main body, so that the insulating effect is improved. The air insulation cavity can further improve the insulation effect of the whole electric power plastic-coated steel pipe, and the service life of the whole electric power plastic-coated steel pipe can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic-coated steel pipes, in particular to an electric plastic-coated steel pipe with good insulation effect. Background Art

[0002] Plastic-coated steel pipe for power generation is a piping material used in power projects. It is coated with a plastic layer on both the inner and outer walls to enhance its corrosion resistance and insulation properties. This type of steel pipe is particularly suitable for underground power transmission lines, effectively protecting cables from environmental corrosion, extending their service life, and reducing maintenance costs. The plastic layer of plastic-coated steel pipe is typically made of materials such as polyethylene and polypropylene, which offer excellent chemical stability, corrosion resistance, and insulation properties. When selecting plastic-coated steel pipe for power generation, factors such as the coating's thickness, adhesion, temperature resistance, and compatibility with cable materials should be considered.

[0003] According to the authorization announcement number CN 214755338 U, the "electric plastic coating with good insulation effect" described herein comprises a tube body, a bump, a groove, and a ferrule. The tube body is connected to a bump at one end, and a groove corresponding to the bump is formed at the other end of the tube body. A ferrule is sleeved on the outer side of the tube body near the top edge of the groove. A mounting hole is provided through one end of the bump, a locking screw is provided in the mounting hole, and a locking nut is provided on the outer side of the end of the locking screw. The ferrule and the bump are fastened together by the locking screw, the locking nut, and the mounting hole. In other words, insulation is achieved only by the plastic coating layer.

[0004] Current designs of plastic-coated steel pipes for electric power transmission primarily rely on the plastic coating for insulation. However, over time and due to environmental influences, the plastic coating may age or peel. Once this occurs, the insulation performance of the plastic-coated steel pipe structure will be significantly reduced or even completely lost. This will not only affect the safe operation of the entire power system but may also lead to serious safety hazards and increased maintenance costs. To address this issue, we offer a plastic-coated steel pipe for electric power transmission with excellent insulation performance. Utility Model Content

[0005] The technical problem solved by the utility model is that the existing electric plastic-coated steel pipe structure is only insulated by the plastic coating layer. When it is used for a long time, the plastic coating layer ages or falls off, and the insulation performance of the electric plastic-coated steel pipe structure will disappear.

[0006] The utility model can be implemented by the following technical solutions: an electric plastic-coated steel pipe with good insulation effect, comprising two steel pipe bodies, the two steel pipe bodies being connected by an insulating connector, and the insulating connector being in communication with the two steel pipe bodies, the outer surface of the steel pipe bodies being provided with an insulating sleeve, the insulating sleeve being connected to the steel pipe bodies by a plurality of metal fixings, and the outer surface of the steel pipe bodies being provided with a plastic coating layer;

[0007] The insulating connector includes an insulating block, which is cylindrical and has sleeve grooves at both ends. One end of the two steel pipe bodies is respectively sleeved in the two end grooves of the insulating block.

[0008] A further technical improvement of the present invention is that the insulating sleeve comprises a plastic insulating sleeve, the plastic insulating sleeve is arranged on the outside of the steel pipe body, and the plastic insulating sleeve is connected to the steel pipe body through a plurality of metal fixings.

[0009] A further technical improvement of the present invention is that a threaded section is provided in the sleeve groove of the insulating block, one end of the plastic insulating sleeve is threadedly connected to the threaded section, and the plastic insulating sleeve is sleeved in the sleeve groove.

[0010] A further technical improvement of the present invention is that an air insulation cavity is formed between the plastic insulation sleeve and the steel pipe body, and a plurality of metal fixings are sequentially arranged in the air insulation cavity.

[0011] A further technical improvement of the present invention is that each metal fixing part includes a metal ring, multiple metal ring fixing sleeves are arranged outside the steel pipe body, and multiple metal rings are arranged in sequence along the length direction of the steel pipe body, and the outer parts of the multiple metal rings are fixedly connected to the inner wall of the plastic insulating sleeve.

[0012] A further technical improvement of the present invention is that both ends of the two plastic insulating sleeves are provided with mounting rings, and the two mounting rings are respectively provided with multiple docking grooves and multiple docking joints, the multiple docking grooves respectively correspond to the multiple docking joints, and the docking grooves are adapted to the docking joints.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The plastic coating layer provided on the outside of the steel pipe body provides preliminary insulation for the power cables inside the steel pipe body, and the plastic insulation sleeve is provided on the outside of the steel pipe body to provide additional insulation protection. At the same time, an air insulation cavity is formed between the plastic insulation sleeve and the steel pipe body. The air insulation cavity can further improve the insulation effect of the entire electric plastic-coated steel pipe and also increase the service life of the entire electric plastic-coated steel pipe;

[0015] (2) A threaded section is provided in the sleeve groove of the insulating block, and one end of the plastic insulating sleeve is threadedly connected to the threaded section to ensure that the plastic insulating sleeve can be firmly sleeved in the sleeve groove, thereby enhancing the reliability of the connection; multiple metal rings are sequentially arranged along the length direction of the steel pipe body, and the outer portions of the multiple metal rings are fixedly connected to the inner wall of the plastic insulating sleeve to ensure the stability of the overall structure;

[0016] (3) Multiple docking grooves correspond to multiple docking joints respectively, and the docking grooves are adapted to the docking joints, thereby achieving precise docking and connection between the two plastic insulating sleeves. Through this design, it can be ensured that the electric plastic-coated steel pipe has good insulation performance and structural stability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the insulating block of the present utility model.

[0021] In the figure: 1. Steel pipe body; 2. Insulation block; 3. Socket groove; 4. Plastic insulation sleeve; 5. Threaded section; 6. Air insulation cavity; 7. Metal ring; 8. Mounting ring; 9. Docking groove; 10. Docking joint. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0023] See also Figure 1-Figure 3 As shown, the present invention proposes a plastic-coated electric power steel pipe with excellent insulation performance. The plastic-coated electric power steel pipe comprises two steel pipe bodies 1, which are interconnected by an insulating connector. The insulating connector maintains good connectivity with the two steel pipe bodies 1. To further enhance insulation, an insulating sleeve is sheathed around the outer surface of the steel pipe bodies 1. This insulating sleeve is securely connected to the steel pipe bodies 1 via multiple metal fasteners. The outer surface of the steel pipe bodies 1 is coated with a plastic coating.

[0024] Specifically, the insulating connector includes an insulating block 2, which is cylindrical in design and has socket grooves 3 at both ends of the insulating block 2. One end of the two steel pipe bodies 1 is respectively socketed into the socket grooves 3 at both ends of the insulating block 2 to achieve connection.

[0025] The insulation kit includes a plastic insulating sleeve 4, which fits over the steel pipe body 1 to provide additional insulation protection. The sleeve 4 is securely connected to the steel pipe body 1 via multiple metal fasteners. To further enhance the reliability of the connection, a threaded section 5 is provided within the socket groove 3 of the insulating block 2. One end of the sleeve 4 is threadedly engaged with the threaded section 5, ensuring that the sleeve 4 is securely fitted within the socket groove 3.

[0026] In order to form an effective air insulation cavity 6, an air insulation cavity 6 is formed between the plastic insulation sleeve 4 and the steel pipe body 1, and multiple metal fixings are arranged in the air insulation cavity 6 in sequence to ensure the uniformity and reliability of the insulation effect; the air insulation cavity 6 can further improve the insulation effect of the entire electric plastic-coated steel pipe.

[0027] Each metal fixing member includes a metal ring 7. Multiple metal rings 7 are fixedly sleeved on the outside of the steel pipe body 1, and multiple metal rings 7 are arranged in sequence along the length of the steel pipe body 1. To further improve the fixing effect, the outer parts of the multiple metal rings 7 are fixedly connected to the inner wall of the plastic insulating sleeve 4 to ensure the stability of the overall structure.

[0028] To facilitate installation and connection, mounting rings 8 are provided at both ends of the two plastic insulating sleeves 4. Each mounting ring 8 is provided with a plurality of docking grooves 9 and a plurality of docking joints 10. The multiple docking grooves 9 correspond to the multiple docking joints 10, and the docking grooves 9 and the docking joints 10 are adapted to each other, thereby achieving precise docking and connection between the two plastic insulating sleeves 4. This design ensures that the electric power plastic-coated steel pipe has excellent insulation performance and structural stability during use.

[0029] When the present invention is in use, the plastic coating layer provided on the outside of the steel pipe body 1 provides preliminary insulation for the power cables inside the steel pipe body 1, and the plastic insulation sleeve 4 is sleeved on the outside of the steel pipe body 1 to provide additional insulation protection. At the same time, an air insulation cavity 6 is formed between the plastic insulation sleeve 4 and the steel pipe body 1. The air insulation cavity 6 can further improve the insulation effect of the entire electric plastic-coated steel pipe.

[0030] A threaded section 5 is provided in the sleeve groove 3 of the insulating block 2, and one end of the plastic insulating sleeve 4 is threadedly connected to the threaded section 5, ensuring that the plastic insulating sleeve 4 can be firmly sleeved in the sleeve groove 3, thereby enhancing the reliability of the connection; multiple metal rings 7 are sequentially arranged along the length direction of the steel pipe body 1, and the outer portions of the multiple metal rings 7 are fixedly connected to the inner wall of the plastic insulating sleeve 4 to ensure the stability of the overall structure;

[0031] Multiple docking grooves 9 correspond to multiple docking joints 10 respectively, and the docking grooves 9 are adapted to the docking joints 10, thereby achieving precise docking and connection between the two plastic insulating sleeves 4. Through this design, it can be ensured that the electric plastic-coated steel pipe has good insulation performance and structural stability during use.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A power plastic-coated steel pipe with good insulation effect, characterized in that: The invention comprises two steel pipe bodies (1), the two steel pipe bodies (1) are connected by an insulating connector, and the insulating connector is in communication with the two steel pipe bodies (1); an insulating sleeve is provided on the outside of the steel pipe bodies (1); the insulating sleeve is connected to the steel pipe bodies (1) by a plurality of metal fixings; and the steel pipe bodies (1) are provided with a plastic coating layer. The insulating connector comprises an insulating block (2), the insulating block (2) is arranged in a cylindrical shape, and both ends of the insulating block (2) are provided with sleeve grooves (3), and one end of the two steel pipe bodies (1) is respectively inserted into the sleeve grooves (3) at both ends of the insulating block (2).

2. The electric plastic-coated steel pipe with good insulation effect according to claim 1 is characterized in that: The insulating sleeve comprises a plastic insulating sleeve (4), which is sleeved on the outside of the steel pipe body (1), and the plastic insulating sleeve (4) is connected to the steel pipe body (1) via a plurality of metal fixings.

3. The electric plastic-coated steel pipe with good insulation effect according to claim 2 is characterized in that: A threaded section (5) is provided in the sleeve groove (3) of the insulating block (2), one end of the plastic insulating sleeve (4) is threadedly connected to the threaded section (5), and the plastic insulating sleeve (4) is sleeved in the sleeve groove (3).

4. The electric power plastic-coated steel pipe with good insulation effect according to claim 2, characterized in that: An air insulation cavity (6) is formed between the plastic insulation sleeve (4) and the steel pipe body (1), and a plurality of metal fixings are sequentially arranged in the air insulation cavity (6).

5. The electric plastic-coated steel pipe with good insulation effect according to claim 2, characterized in that: Each metal fixing part comprises a metal ring (7), wherein a plurality of metal rings (7) are fixedly sleeved outside the steel pipe body (1), and the plurality of metal rings (7) are sequentially arranged along the length direction of the steel pipe body (1), and the exterior of the plurality of metal rings (7) is fixedly connected to the inner wall of the plastic insulating sleeve (4).

6. The electric plastic-coated steel pipe with good insulation effect according to claim 2, characterized in that: Both ends of the two plastic insulating sleeves (4) are provided with mounting rings (8), and the two mounting rings (8) are respectively provided with a plurality of docking grooves (9) and a plurality of docking joints (10), the plurality of docking grooves (9) respectively correspond to the plurality of docking joints (10), and the docking grooves (9) and the docking joints (10) are adapted to each other.

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