Plastic-coated steel pipe capable of preventing plastic-coated layer from falling off

Abstract

The plastic-coated steel pipe capable of preventing the plastic-coated layer from falling off comprises a plastic-coated steel pipe body, the outer side wall of the plastic-coated steel pipe body is sleeved with two connecting pieces, the side walls of the two connecting pieces are provided with first installation grooves and second installation grooves, the two connecting pieces are connected with heat preservation sleeves in an inserted mode through the opposite first installation grooves, and the heat preservation sleeves are connected with the plastic-coated layer through the second installation grooves. Protective sleeves are inserted into the two connecting pieces through the opposite second mounting grooves; according to the plastic-coated steel pipe, the connecting pieces are arranged, so that the whole plastic-coated steel pipe adopts modular design, the heat preservation sleeve and the protective sleeve are connected with the plastic-coated steel pipe body through the connecting pieces, when the heat preservation sleeve or the protective sleeve is locally damaged, only the damaged part needs to be replaced, the whole plastic-coated steel pipe does not need to be replaced, and the maintenance cost is reduced. And by arranging the heat preservation sleeve and the protection sleeve, double protection is conducted on the plastic-coated steel pipe body, and the plastic-coated layer is effectively prevented from being damaged by external temperature difference changes, mechanical impact and other factors.

Description

Technical Field

[0001] This utility model relates to the field of steel pipes, and in particular to a plastic-coated steel pipe that prevents the plastic coating from peeling off. Background Technology

[0002] Plastic-coated steel pipe, a composite pipe combining the high strength of steel and the excellent corrosion resistance and wear resistance of plastic, is a steel-plastic composite pipe with a layer of plastic anti-corrosion coating fused to the inner surface of the steel pipe or to both the inner and outer surfaces through processes such as spraying, rolling, dipping, or suction. It is widely used in petroleum, chemical, natural gas, and water supply and drainage industries. During use, plastic-coated steel pipes are typically installed in fixed areas for long-term transport of liquids or gases. In this environment, large temperature variations can cause thermal expansion and contraction of the steel pipe and its plastic coating, leading to cracking and peeling.

[0003] In related technologies, a utility model patent with patent publication number CN221258142U proposes a plastic-coated steel pipe to prevent the plastic coating from peeling off. The pipe includes a steel pipe body, a vacuum groove on the inner wall of a protective sleeve, insulation cotton on the inner wall of the vacuum groove, multiple buffer grooves at equal intervals on the outer wall of the protective sleeve, an inner tube on the inner wall of the steel pipe body, multiple buffer pads fixed at equal intervals on the inner wall of the inner tube, and multiple protrusions fixed at equal intervals on the inner wall of the inner tube.

[0004] Based on the aforementioned prior art, the inventors, in conjunction with relevant technologies, discovered in practical applications that although this utility model solves the problem of large external temperature variations by using a protective sleeve to insulate the steel pipe, the protective sleeve may be damaged for various reasons during external use. Once damaged, it can no longer insulate the steel pipe, and the entire protective sleeve on the outside of the steel pipe needs to be replaced and re-welded when damaged, which greatly increases maintenance costs and time. Utility Model Content

[0005] To address the problem that existing protective sleeves require complete replacement and re-welding when damaged, increasing maintenance costs and time, this utility model provides a plastic-coated steel pipe that prevents the plastic coating from peeling off.

[0006] The present invention provides a plastic-coated steel pipe with anti-coating layer peeling, which adopts the following technical solution:

[0007] A plastic-coated steel pipe for preventing plastic coating peeling includes a plastic-coated steel pipe body. Two connectors are sleeved on the outer side wall of the plastic-coated steel pipe body. The side walls of the two connectors are provided with a first mounting groove and a second mounting groove. Insulation sleeves are inserted into the two connectors through the opposite first mounting grooves. Protective sleeves are inserted into the two connectors through the opposite second mounting grooves.

[0008] Furthermore, the interior of the insulation sleeve is provided with a vacuum layer and an insulation layer, wherein the inner diameter of the vacuum layer is smaller than the inner diameter of the insulation layer.

[0009] Furthermore, the thickness of the vacuum layer is 0.1-0.2 mm.

[0010] Furthermore, the outer wall of the protective sleeve is integrally formed with a first driving slope, and the inner wall corresponding to the second mounting groove is formed with a second driving slope, and the first driving slope can be engaged with the second driving slope.

[0011] Furthermore, the protective sleeve is an aluminum tube or a galvanized iron tube.

[0012] Furthermore, the insulation layer is made of mineral wool or polyurethane foam.

[0013] Furthermore, the connector has a first mounting groove and a second mounting groove on both sides of its sidewall.

[0014] In summary, the beneficial effects of this utility model are as follows:

[0015] This utility model adopts a modular design by incorporating connectors. The insulation sleeve and protective sleeve are connected to the plastic-coated steel pipe body via these connectors. When the insulation sleeve or protective sleeve is partially damaged, only the damaged part needs to be replaced, eliminating the need for complete replacement and reducing maintenance costs. The insulation sleeve and protective sleeve provide double protection for the plastic-coated steel pipe body, effectively preventing damage to the coating layer from external temperature changes, mechanical impacts, and other factors. By incorporating a vacuum layer and an insulation layer inside the insulation sleeve, external temperature changes can be effectively isolated, preventing the coating layer from peeling off due to thermal expansion and contraction. The inclusion of a first and second driving inclined surface reinforces both the connection between the protective sleeve and the connectors, as well as the connection between the insulation sleeve and the connectors at both ends. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the present invention from the right side.

[0018] Figure 3 This utility model Figure 2 Enlarged schematic diagram of structure A in the middle;

[0019] Figure 4 This is a cross-sectional view of the thermal insulation sleeve of this utility model.

[0020] As shown in the figure: 1-Plastic coated steel pipe body, 2-Connector, 3-First mounting groove, 4-Second mounting groove, 5-Insulation sleeve, 51-Vacuum layer, 52-Insulation layer, 6-Protective sleeve, 61-First driving inclined surface, 62-Second driving inclined surface. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 The present invention will be further described in detail below:

[0022] This utility model discloses a plastic-coated steel pipe that prevents the plastic coating from peeling off, such as... Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a plastic-coated steel pipe for preventing the plastic coating from peeling off, comprising a plastic-coated steel pipe body 1. Two connectors 2 are sleeved on the outer wall of the plastic-coated steel pipe body 1. The side walls of the two connectors 2 have a first mounting groove 3 and a second mounting groove 4. Insulating sleeves 5 are inserted into the two connectors 2 through the opposing first mounting grooves 3, and protective sleeves 6 are inserted into the two connectors 2 through the opposing second mounting grooves 4. In this embodiment, the specific structure of the connectors 2 is as follows: Figure 3 As shown, the connector 2 has a first mounting groove 3 and a second mounting groove 4 on both sides of its sidewall. Multiple connectors 2 can be used to connect multiple insulation sleeves 5 and protective sleeves 6. Furthermore, by changing the position of the connectors 2, insulation sleeves 5 and protective sleeves 6 of different lengths can be accommodated. The two ends of the insulation sleeve 5 are tightly inserted into the first mounting groove 3 via an interference fit, and the two ends of the protective sleeve 6 are tightly inserted into the second mounting groove 4 via an interference fit. By using the connectors 2, a modular design is adopted, connecting the insulation sleeves 5 and protective sleeves 6 to the plastic-coated steel pipe body 1. When a part of the insulation sleeve 5 or protective sleeve 6 is damaged, only the damaged part needs to be replaced, eliminating the need for complete replacement and reducing maintenance costs. The insulation sleeves 5 and protective sleeves 6 provide double protection for the plastic-coated steel pipe body 1, effectively preventing damage to the plastic coating caused by external temperature changes, mechanical impacts, and other factors. Preferably, the protective sleeve 6 is an aluminum pipe or a galvanized iron pipe.

[0023] like Figure 4 As shown, the insulation sleeve 5 has a vacuum layer 51 and an insulation layer 52 inside, and the inner diameter of the vacuum layer 51 is smaller than the inner diameter of the insulation layer 52; in this embodiment, the specific structure of the insulation sleeve 5 is as follows. Figure 4 As shown, by providing a vacuum layer 51 and an insulation layer 52 inside the insulation sleeve 5, external temperature changes can be effectively isolated, preventing the plastic coating from peeling off due to thermal expansion and contraction. Preferably, the thickness of the vacuum layer 51 is 0.1-0.2 mm. Preferably, the insulation layer 52 is made of mineral wool or polyurethane foam.

[0024] like Figure 3 As shown, the outer wall of the protective sleeve 6 is integrally formed with a first driving slope 61, and the corresponding inner wall of the second mounting groove 4 is formed with a second driving slope 62. The first driving slope 61 can be engaged with the second driving slope 62. In this embodiment, by setting the first driving slope 61 and the second driving slope 62, the connection between the protective sleeve 6 and the connector 2 is made more stable. It is worth noting that both ends of the protective sleeve 6 are engaged with the connector 2 through the second driving slope 62. This not only prevents the protective sleeve 6 from falling off, but also strengthens the connection between the insulation sleeve 5 and the connectors 2 at both ends.

[0025] The implementation principle of this utility model embodiment is as follows:

[0026] During connection, firstly, two connectors 2 are fitted onto the outer surface of the plastic-coated steel pipe body 1. First, one end of the insulation sleeve 5 is inserted into the first mounting groove 3 of one connector 2. Then, one end of the protective sleeve 6 is inserted into the second mounting groove 4 of the same connector 2. Finally, the other connector 2 is connected to the insulation sleeve 5 and the protective sleeve 6. When the protective sleeve 6 is inserted into the second mounting groove 4, the first driving inclined surface 61 and the second driving inclined surface 62 will form a snap-fit ​​connection, making the connection between the protective sleeve 6 and the connector 2 more stable.

[0027] When a section of the insulation sleeve 5 or the protective sleeve 6 is damaged, a new insulation sleeve 5 or the protective sleeve 6 can be reinstalled through the connector 2.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plastic-coated steel pipe for preventing the plastic coating from peeling off, comprising a plastic-coated steel pipe body (1), characterized in that: The outer wall of the plastic-coated steel pipe body (1) is fitted with two connectors (2). The side walls of the two connectors (2) are provided with a first mounting groove (3) and a second mounting groove (4). The two connectors (2) are connected to the insulation sleeve (5) through the opposite first mounting groove (3). The two connectors (2) are connected to the protective sleeve (6) through the opposite second mounting groove (4).

2. The plastic-coated steel pipe for preventing plastic coating peeling according to claim 1, characterized in that: The insulation sleeve (5) has a vacuum layer (51) and an insulation layer (52) inside, and the inner diameter of the vacuum layer (51) is smaller than the inner diameter of the insulation layer (52).

3. A plastic-coated steel pipe for preventing plastic coating peeling according to claim 2, characterized in that: The thickness of the vacuum layer (51) is 0.1-0.2 mm.

4. A plastic-coated steel pipe for preventing plastic coating peeling according to claim 2, characterized in that: The outer wall of the protective sleeve (6) is integrally formed with a first driving slope (61), and the inner wall of the second mounting groove (4) is formed with a second driving slope (62). The first driving slope (61) can be engaged with the second driving slope (62).

5. A plastic-coated steel pipe for preventing plastic coating peeling according to claim 1, characterized in that: The protective sleeve (6) is an aluminum tube or a galvanized iron tube.

6. A plastic-coated steel pipe for preventing plastic coating peeling according to claim 2, characterized in that: The insulation layer (52) is made of mineral wool or polyurethane foam.

7. A plastic-coated steel pipe for preventing plastic coating peeling according to claim 1, characterized in that: The connector (2) has a first mounting groove (3) and a second mounting groove (4) on both sides of its sidewall.

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