A new type of heat tracing reinforced composite pipe

Abstract

The present application belongs to the technical field of heat tracing pipe manufacturing, and particularly relates to a novel heat tracing and reinforcing composite pipe, which comprises a plastic core pipe, at least one heating type reinforcing tape layer and a plastic outer layer, the heating type reinforcing tape layer is wound outside the plastic core pipe, and the plastic outer layer is combined outside the heating type reinforcing tape layer; the heating type reinforcing tape layer comprises a plastic layer and reinforcing wires and electric heating wires arranged inside the plastic layer, at least one electric heating wire forms a heat tracing section, and at least one reinforcing wire forms a reinforcing section. In the present application, the electric heating wires are arranged in the reinforcing tape, and the electric heating wires are arranged when the reinforcing tape is wound, so that a special wire arranging unit is not needed. The electric heating wires can be arranged without increasing the plastic layer, the wall thickness of the core pipe and the total wall thickness of the RTP pipe, and the heat tracing composite pipe provided with the heating reinforcing tape is formed.

Description

Technical Field

[0001] This invention belongs to the field of heat tracing pipe manufacturing technology, specifically relating to a novel heat tracing reinforced composite pipe. Background Technology

[0002] Conventional heat tracing pipes have a separate heat tracing layer, which is usually arranged on the outer wall of the core pipe and is a separate layer between the reinforcing layer and the inner wall. The spiral winding angle of the heat tracing layer is generally 15°±10°, or 0° (i.e., arranged along the axial direction of the pipe).

[0003] In the prior art, such as the invention patent with patent application number CN201610884874.7 entitled "Intelligent Constant-Temperature Flexible Composite Oil Transmission Heat Tracing Pipeline and its Manufacturing Method", the technical solution is as follows: an intelligent constant-temperature flexible composite oil transmission heat tracing pipeline, which, from the inside out, includes an inner liner, a heat tracing tape, a reinforcing layer, an inner protective layer, an insulation layer, and an outer protective layer, wherein: a spiral groove is provided on the outer surface of the inner liner, the size of the heat tracing tape matches the size of the spiral groove, the heat tracing tape is wound and arranged in the spiral groove on the outer surface of the inner liner, the reinforcing layer covers the heat tracing tape and wraps the inner liner, the inner protective layer covers the outside of the reinforcing layer, the insulation layer covers the outside of the inner protective layer, and the outer protective layer covers the outside of the insulation layer.

[0004] The existing technology and the solutions of the aforementioned patents both involve adding a separate heat tracing layer outside the core tube. Because the heating wire is relatively thick (generally φ3-5mm in diameter), the heat tracing layer is relatively thick, which increases the total wall thickness of the pipe significantly compared to the pipe without heat tracing. This greatly increases the cost of the pipe and also makes it difficult to fill during the composite process, leaving traces of the filling process on the outer wall of the pipe (when the heat tracing layer is outside the reinforcement layer), or causing unevenness in the reinforcement layer, resulting in uneven local stress and affecting the mechanical properties of the reinforcement layer (when the heat tracing layer is inside the reinforcement layer). Summary of the Invention

[0005] In order to solve the above-mentioned problems in the existing technology, a new type of heat-tracing reinforced composite pipe that integrates the heat tracing tape and the reinforcing layer into one piece is proposed.

[0006] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows: A novel heat-tracing reinforced composite pipe includes a plastic core pipe, at least one heating-type reinforcing strip layer, and a plastic outer layer. The heating-type reinforcing strip is wound around the plastic core pipe to form the heating-type reinforcing strip layer, and the plastic outer layer is composited on the outside of the heating-type reinforcing strip layer. The heating-type reinforcing strip includes a plastic layer and reinforcing wires and heating wires located inside the plastic layer. At least one heating wire constitutes a heat-tracing section, and at least one reinforcing wire constitutes a reinforcing section.

[0007] Furthermore, the heat tracing section is a single section, which includes a single heating wire located between multiple reinforcing wires.

[0008] Furthermore, the heat tracing section is a single section, comprising multiple heating wires, and is located between multiple reinforcing wires.

[0009] Furthermore, the heat tracing section is divided into multiple sections, each heat tracing section is a single electric heating wire, and each heat tracing section has a reinforcing section next to it, each reinforcing section being a single reinforcing wire.

[0010] Furthermore, the heat tracing section is divided into multiple sections, each heat tracing section includes multiple heating wires, and each heat tracing section has a reinforcing section next to it, each reinforcing section containing multiple reinforcing wires.

[0011] Furthermore, the reinforcing wire is made of non-metallic material, and the spacing between adjacent heating wires is the same as the spacing between adjacent reinforcing wires.

[0012] Furthermore, the reinforcing wire is made of metal, and the spacing between adjacent heat tracing sections and reinforcing sections is greater than or equal to 0 mm or equal to the spacing between adjacent reinforcing wires.

[0013] Furthermore, the thickness of the plastic layer is at least 1 mm greater than the outer diameter of the heating wire.

[0014] Furthermore, the heating wires in the heating-type reinforcing strip are not centrally located in the thickness direction, and the distance between the heating wires and one side of the plastic layer is greater than the distance between the heating wires and the other side of the plastic layer.

[0015] Furthermore, the heating wire is a bare wire, an enameled wire, or an insulated heating wire.

[0016] Furthermore, the heating wire with the insulating layer is a single strand or a multi-strand metal wire.

[0017] Furthermore, the diameter of the heating wire is 0.5mm to 3mm.

[0018] Furthermore, the heating-type reinforcing strip layer has at least two layers, with a plastic outer layer laminated to the outside of the outer heating-type reinforcing strip layer.

[0019] Furthermore, at least one non-heated reinforcing strip layer is wound around the heated reinforcing strip layer.

[0020] Furthermore, the plastic core tube is wrapped with at least one layer of non-heated reinforcing tape, and the non-heated reinforcing tape is wrapped with at least one layer of heated reinforcing tape.

[0021] Furthermore, the number of both non-heated and heated reinforcing strips is multiple and equal, with the multiple non-heated and heated reinforcing strips wound left and right.

[0022] Furthermore, the winding angle of the heated reinforcing tape layer is 54.7°±10°.

[0023] Furthermore, the outer plastic layer is filled with a thermal insulation material layer, and a plastic outer protective layer is laminated on the outer surface of the thermal insulation material layer.

[0024] Furthermore, the plastic core tube is spirally wound with three heating reinforcing strips and one non-heating reinforcing strip. The three heating reinforcing strips and one non-heating reinforcing strip form a heating reinforcing strip layer on the outside of the plastic core tube. The position of the heat tracing section in each heating reinforcing strip is different in the width of the reinforcing strip. The spacing of the heat tracing sections in the set of lengths formed by the three heating reinforcing strips and one non-heating reinforcing strip is consistent in the axial section of the tube.

[0025] The advantages of this invention are: 1. In this invention, the heating wire is placed in the reinforcing strip, and the heating wire is arranged when the reinforcing strip is wound, without the need for a special wire laying machine.

[0026] 2. In existing technologies, either a heat tracing wire groove is pre-reserved on the plastic core tube (which requires more material due to the thicker core tube wall and weakens the core tube's strength), or the heat tracing wire is directly wound around the core tube and then filled with plastic (which also increases the material required for the tube and the unit). This invention allows for the placement of the heating wire without adding an extra plastic layer, or increasing the core tube wall thickness or the total wall thickness of the RTP tube, thus forming a heat tracing composite tube with a heating enhancement strip.

[0027] 3. Existing heat tracing tapes are placed or cold-wound, resulting in gaps and reduced thermal efficiency. In contrast, the present invention produces the heating wire and reinforcing wire simultaneously on the tape-making equipment, ensuring excellent integration of the heating wire with each layer. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a new type of heat-tracing reinforced composite pipe.

[0029] Figure 2 This is a schematic diagram of another embodiment of the novel heat-tracing reinforced composite pipe.

[0030] Figure 3 This is a top view schematic diagram of a heated reinforcing strip.

[0031] Figure 4 This is a schematic diagram of the end face structure of the first type of heated reinforced strip layer.

[0032] Figure 5 This is a schematic diagram of the end face structure of the second type of heated reinforced strip layer.

[0033] Figure 6 This is a schematic diagram of the end face structure of heating-type reinforced strip layer method three.

[0034] Figure 7 This is a schematic diagram of the end face structure of the fourth heating-type reinforced strip layer method.

[0035] Figure 8 This is a schematic diagram showing the spacing between the heating wire and the reinforcing wire.

[0036] Figure 9 This is a schematic diagram showing the positional relationship between the plastic layer and the heating wire.

[0037] Figure 10 This is a schematic diagram of the electric heating wire structure.

[0038] Figure 11 This is a schematic diagram of another embodiment of the electric heating wire structure.

[0039] Figure 12 This is a schematic diagram showing the distribution of heating wires wound around a plastic core tube with a heating-type reinforcing strip layer.

[0040] In the attached image: 1-Plastic core tube, 2-Heating reinforcing strip layer, 3-Plastic outer layer, 4-Heating reinforcing strip, 5-Plastic layer, 6-Reinforcing wire, 7-Heating wire, 8-Heating section, 9-Reinforcing section, 10-Single strand wire, 11-Multi-strand metal wire, 12-Insulation layer, 13-Non-Heating reinforcing strip layer, 14-Insulation material layer, 15-Plastic outer protective layer, 16-Non-Heating reinforcing strip. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this invention, it should be noted that the terms "upper," "vertical," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Example 1 like Figure 1 and Figure 3 As shown, a novel heat-tracing reinforced composite pipe includes a plastic core pipe 1, at least one heating-type reinforcing strip layer 2, and a plastic outer layer 3. The heating-type reinforcing strip 4 is wound around the plastic core pipe 1 to form the heating-type reinforcing strip layer 2, and the plastic outer layer 3 is composited around the heating-type reinforcing strip layer 2. The heating-type reinforcing strip 4 includes a plastic layer 5 and reinforcing wires 6 and heating wires 7 located inside the plastic layer 5. At least one heating wire 7 constitutes a heat-tracing section 8, and at least one reinforcing wire 6 constitutes a reinforcing section 9. The heat-tracing section 8 and the reinforcing section 9 are spaced apart. An external power supply and controller are connected to the heat-tracing composite pipe using existing technology. For example, if the heat-tracing composite pipe has three sets of heating wires, the three sets of heating wires are twisted together by peeling off the plastic outer layer 3 from one end of the heat-tracing composite pipe, and the plastic outer layer 3 is peeled off from another end, connecting one of the three-phase power supplies from the controller.

[0047] Each layer of heated reinforcing strip 2 may contain multiple heated reinforcing strips 4, or may include heated reinforcing strips 4 and non-heated reinforcing strips 16.

[0048] This invention places the heating wire within the reinforcing strip, and the heating wire is positioned during the winding of the reinforcing strip, eliminating the need for a dedicated wire-laying unit. Existing technologies either pre-reserve a groove for the heating wire in the plastic core tube 1 (which requires more material due to the thicker core tube wall and compromises its strength) or directly wind the heating wire and then fill the groove with plastic (also increasing the material required for the tube and requiring additional equipment). This invention allows the heating wire to be placed without adding an extra plastic layer 5, or increasing the core tube wall thickness or the total wall thickness of the RTP tube, forming a composite heat tracing tube with a heating reinforcing strip. Existing heat tracing tapes are placed or cold-wound, resulting in gaps and reduced thermal efficiency. In contrast, because the heating wire and reinforcing wire 6 are produced simultaneously on the tape-making equipment, the heating wire has excellent overall bonding with each layer.

[0049] Example 2 like Figure 1 and Figure 3 As shown, a novel heat-tracing reinforced composite pipe includes a plastic core pipe 1, at least one heating-type reinforcing strip layer 2, and a plastic outer layer 3. The heating-type reinforcing strip 4 is wound around the plastic core pipe 1 to form the heating-type reinforcing strip layer 2, and the plastic outer layer 3 is composited around the heating-type reinforcing strip layer 2. The heating-type reinforcing strip 4 includes a plastic layer 5 and reinforcing wires 6 and heating wires 7 located inside the plastic layer 5. At least one heating wire 7 constitutes a heat-tracing section 8, and at least one reinforcing wire 6 constitutes a reinforcing section 9. The heat-tracing section 8 and the reinforcing section 9 are spaced apart. An external power supply and controller are connected to the heat-tracing composite pipe using existing technology. For example, if the heat-tracing composite pipe has three sets of heating wires, the three sets of heating wires are twisted together by peeling off the plastic outer layer 3 from one end of the heat-tracing composite pipe, and the plastic outer layer 3 is peeled off from another end, connecting one of the three-phase power supplies from the controller.

[0050] Each layer of heated reinforcing strip 2 may contain multiple heated reinforcing strips 4, or may include heated reinforcing strips 4 and non-heated reinforcing strips 16.

[0051] like Figure 4 As shown, the heat tracing section 8 can be a single segment, comprising a single heating wire 7 located between multiple reinforcing wires 6. This structure does not affect the reinforcement performance. However, the heating power is low; increasing the power would only require increasing the diameter of the heating wire 7, resulting in a thicker reinforcement strip with a significantly different diameter from the reinforcing wires 6, which would negatively impact the performance of the pipe reinforcement layer.

[0052] like Figure 5As shown, the heat tracing section 8 can also be a single section, comprising multiple heating wires 7, located between multiple reinforcing wires 6. This structure can achieve high heating power using small-diameter heating wires 7. However, the pipe reinforcement will be somewhat lacking, affecting the pipe's pressure resistance (uneven stress). This is because the tensile strength of the heating wires 7 cannot withstand the internal pressure of the pipe. In terms of width, the heat tracing section 8 will continuously occupy a portion of the reinforcing strip, so this section will become a weak point in the pressure-bearing area. Even with multi-layer winding, although there is some overall reinforcement, there will always be places lacking reinforcing wires 6. The weak points in the pipe's pressure resistance become uncertain, and under continuous working pressure, the weak points will be gradually damaged layer by layer.

[0053] like Figure 6 As shown, the heat tracing section 8 can also be multiple sections, each consisting of a single heating wire 7. Each heat tracing section 8 is accompanied by a reinforcing section 9, each consisting of a single reinforcing wire 6. This structure can balance reinforcement performance with ensuring uniform heating of the pipe. However, when connecting the power supply or controller later, it is difficult to distinguish between them. Different colored heating wires 7 must be used for identification. For example, three heating reinforcement strips 4 are set outside the plastic core tube 1. The heating wires 7 used in the same heating reinforcement strip 4 are of the same color, but the colors of the heating wires 7 in the three heating reinforcement strips 4 are different. That is, the heating reinforcement strip layer 2 of the heat tracing composite pipe contains three heating reinforcement strips 4 of different colors.

[0054] like Figure 7 As shown, the heat tracing section 8 can also be multiple sections, each including multiple heating wires 7. Each heat tracing section 8 is accompanied by a reinforcing section 9, and each reinforcing section 9 contains multiple reinforcing wires 6. This structure allows for increased heating power using smaller wire diameters while ensuring the uniformity of the pipe's pressure resistance. The heating wires 7 between different reinforcing sections can also be distinguished by color for easy grouping and connection to the power supply and controller later.

[0055] In the heating type reinforcing strip 4, the reinforcing wire 6 is made of non-metallic material (such as polyester filament, aramid filament, etc.). The distance between adjacent heating sections 8 and reinforcing sections 9 is greater than or equal to 0 mm or equal to the distance between adjacent reinforcing wires 6. It is not necessary to leave a wide gap between the heating wire 7 and the non-metallic reinforcing wire.

[0056] For non-metallic heating reinforcing strips, since they are not conductors, the heat tracing section 8 consisting of adjacent heating wires and multiple heating wires can be arranged with the same spacing as the reinforcing wires, or they can be set close together.

[0057] Alternatively, the reinforcing wire 6 may be made of metal (such as steel wire, steel cord, etc.). Figure 8As shown, the spacing between adjacent heating sections 8 and reinforcing sections 9 is greater than or equal to 1 mm. This is primarily to prevent short circuits between the heating wire 7 and the metal reinforcing wire 6. It also allows the spacing between adjacent heating wires to be greater than the distance between adjacent reinforcing wires 6.

[0058] The thickness of the plastic layer 5 is more than 1 mm greater than the outer diameter of the heating wire 7. The purpose is to prevent interlayer short circuits in the heating wire 7 during the hot-melt bonding process when the two layers of heating-type reinforcing tape 2 are wrapped around the pipe.

[0059] like Figure 9 As shown, the heating wire 7 in the heating-type reinforcing strip 4 is not centrally located in the thickness direction. The distance between the heating wire 7 and one side of the plastic layer 5 is greater than the distance between the heating wire 7 and the other side of the plastic layer 5, that is, one side is thicker than the other. When the tube is wound, the two sides with the thicker distance come into contact. The purpose is to further increase the spacing between the two layers of heating wire 7 to prevent short circuits.

[0060] The heating wire 7 is a bare wire (such as bare copper wire, copper-nickel wire, nickel-chromium wire, iron-chromium wire, manganese-copper wire, etc.), enameled wire, or heating wire 7 with insulation layer 12.

[0061] like Figure 10 and Figure 11 As shown, the heating wire 7 with insulation layer 12 is a single strand 10 or a multi-strand metal wire 11. If the heating wire 7 with its own insulation layer 12 is used, then no gap is needed between the heating wire 7 and the reinforcing wire 6. The diameter of the heating wire 7 is 0.5 mm to 3 mm.

[0062] like Figure 1 As shown, the heating-type reinforcing strip layer 2 has at least two layers, and a plastic outer layer 3 is laminated to the outside of the outer heating-type reinforcing strip layer 2.

[0063] As another structure, such as Figure 2 As shown, at least one layer of non-heated reinforcing tape 13 is wound around the heated reinforcing tape 2.

[0064] Alternatively, in another structure, the plastic core tube 1 is wound with at least one layer of non-heated reinforcing tape 13, and the non-heated reinforcing tape 13 is wound with at least one layer of heated reinforcing tape 2.

[0065] The number of unheated reinforcing strip layers 13 and heated reinforcing strip layers 2 are both multiple and equal, and the multiple layers of unheated reinforcing strip layers 13 and heated reinforcing strip layers 2 are wound left and right. The purpose of winding them left and right is to ensure that the pipe does not rotate along the axis during the pipe production process.

[0066] The winding angle of the heated reinforcing tape layer 2 is 54.7°±10°.

[0067] The outer plastic layer 3 is filled with an insulation material layer 14, and the insulation material layer 14 is coated with a plastic outer protective layer 15.

[0068] like Figure 12 As shown, the plastic core tube 1 is spirally wound with three heated reinforcing strips 4 and one non-heated reinforcing strip 16. These three heated reinforcing strips 4 and one non-heated reinforcing strip 16 form a heated reinforcing strip layer 2 around the plastic core tube 1. The positions of the heat-tracing segments 8 within each heated reinforcing strip 4 differ in width. The heat-tracing segments 8 within the set of lengths 4 formed by the three heated reinforcing strips and one non-heated reinforcing strip 16 are spaced evenly on the axial cross-section of the tube. Here, "evenly spaced" means that the spacing between each heat-tracing segment 8 is exactly the same, or approximately the same, with a difference not exceeding ten percent.

[0069] For a heat tracing composite pipe formed by winding four reinforcing strips (with the existing number of winding strips), the heat tracing segments 8 on each of the four reinforcing strips are arranged in different positions along the width of the reinforcing strip. When viewed as a whole along the pipe axis, there are three heating reinforcing strips 4 among the four reinforcing strips, and the three heat tracing segments 8 among them are better arranged in a basically uniform manner along the length formed by the four reinforcing strips.

Claims

1. A heat-tracing reinforced composite pipe, characterized in that: It includes a plastic core tube (1), at least one heating reinforcing strip layer (2) and a plastic outer layer (3). The heating reinforcing strip (4) is wound around the plastic core tube (1) to form the heating reinforcing strip layer (2). The plastic outer layer (3) is composited on the outside of the heating reinforcing strip layer (2). The heating reinforcing strip (4) includes a plastic layer (5) and reinforcing wires (6) and heating wires (7) located inside the plastic layer (5). At least one heating wire (7) constitutes a heat tracing section (8), and at least one reinforcing wire (6) constitutes a reinforcing section (9). The plastic core tube (1) is spirally wound with 3 heating reinforcing strips (4) and 1 non-heating reinforcing strip (16). The 3 heating reinforcing strips (4) and 1 non-heating reinforcing strip (16) form a heating reinforcing strip layer (2) on the outside of the plastic core tube (1). The position of the heat tracing section (8) in each heating reinforcing strip (4) is different in its reinforcing strip width. The heat tracing section (8) in a set of lengths formed by the 3 heating reinforcing strips (4) and 1 non-heating reinforcing strip (16) has the same spacing on the axial section of the tube.

2. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating reinforcement strip (4) has a heating section (8) which includes a single heating wire (7) located between multiple reinforcement wires (6).

3. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating-type reinforcing strip (4) has a heating section (8) which includes multiple heating wires (7) and is located between multiple reinforcing wires (6).

4. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating type reinforcing strip (4) has multiple heating sections (8), each heating section (8) is a single electric heating wire (7), and each heating section (8) has a reinforcing section (9) next to it, each reinforcing section (9) is a single reinforcing wire (6).

5. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating reinforcement strip (4) has multiple heating sections (8), each heating section (8) includes multiple heating wires (7), each heating section (8) has a reinforcement section (9) next to it, and each reinforcement section (9) includes multiple reinforcement wires (6).

6. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The reinforcing wire (6) in the heating type reinforcing strip (4) is made of non-metallic material, and the distance between adjacent heat tracing sections (8) and reinforcing sections (9) is greater than or equal to 0 mm or equal to the distance between adjacent reinforcing wires (6).

7. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The reinforcing wire (6) in the heating type reinforcing strip (4) is made of metal, and the distance between adjacent heat tracing sections (8) and reinforcing sections (9) is greater than or equal to 1 mm.

8. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The thickness of the heating type reinforcing strip (4) is more than 1 mm greater than the outer diameter of the heating wire (7).

9. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating wire (7) in the heating type reinforcing strip (4) is not centered in the thickness direction, and the distance between the heating wire (7) and one side of the plastic layer (5) is greater than the distance between the heating wire (7) and the other side of the plastic layer (5).

10. A heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating wire (7) in the heating type reinforcing strip (4) is a bare wire, an enameled wire, or a heating wire (7) with an insulation layer (12).

11. A heat-tracing reinforced composite pipe according to claim 10, characterized in that: The heating wire (7) with insulation layer (12) in the heating type reinforcing strip (4) is a single strand (10) or a multi-strand metal wire (11).

12. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating type reinforcing strip (4) has an electric heating wire (7) with a diameter of 0.5 mm to 3 mm.

13. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating-type reinforcing strip (2) has at least two layers, with a plastic outer layer (3) composited on the outside of the outer heating-type reinforcing strip (2).

14. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heated reinforcing strip (2) is wrapped with at least one non-heated reinforcing strip (13).

15. A heat-tracing reinforced composite pipe according to claim 1, characterized in that: The plastic core tube (1) is wrapped with at least one layer of non-heated reinforcing tape (13), and the non-heated reinforcing tape (13) is wrapped with at least one layer of heated reinforcing tape (2).

16. The heat-tracing reinforced composite pipe according to claim 1, characterized in that: The heating type reinforcing strip layer (2) has a winding angle of 54.7°±10°.

17. A heat-tracing reinforced composite pipe according to claim 1, characterized in that: The outer plastic layer (3) is filled with a thermal insulation material layer (14), and the thermal insulation material layer (14) is coated with a plastic outer protective layer (15).

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