Heat-conducting pressure-resistant enhanced MPP (modified polypropylene) pipe

Abstract

The utility model relates to the technical field of MPP pipes, and discloses a heat-conducting pressure-resistant enhanced MPP pipe which comprises an outer pipe and an inner pipe, a filling layer is arranged between the outer pipe and the inner pipe, and the outer pipe is provided with outer ripples distributed in the radial direction of the outer pipe; a center pipe is arranged at the center of the inner side of the inner pipe, a plurality of heat conduction supporting pieces distributed in the radial direction of the center pipe are evenly distributed in the circumferential direction of the center pipe, and the heat conduction supporting pieces sequentially penetrate through the inner pipe, the filling layer and the pipe wall at the wave trough of the outer corrugation. The problems that in the prior art, the inner and outer compression resistance of a pipe body of an MPP pipe is poor, heat is accumulated together, and heat dissipation is inconvenient are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of MPP pipes, in particular to a heat-conducting and pressure-resistant enhanced MPP pipe. Background Art

[0002] MPP pipe, also known as MPP power cable protection pipe, usually uses modified polypropylene as the main raw material. Due to the harsh operating environment, the cable protection pipe needs to enhance the plastic material to have higher ring stiffness to resist external loads. At the same time, the cable in the pipe will generate more heat when energized, causing heat accumulation in the pipe, which requires heat dissipation.

[0003] When the existing MPP tube structure is sheathed on the outside of the cable, the compressive performance inside and outside the tube is poor. Since the cables are piled up inside the tube, the heat is accumulated together and it is not easy to dissipate heat, which reduces the life of the cable. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a heat-conducting and pressure-resistant enhanced MPP pipe to solve the problems in the prior art of poor pressure resistance inside and outside the MPP pipe body and heat accumulation that is inconvenient for heat dissipation.

[0005] The utility model solves the above technical problems through the following technical means: a heat-conducting and pressure-resistant enhanced MPP pipe, comprising an outer pipe and an inner pipe, a filling layer is provided between the outer pipe and the inner pipe, the outer pipe is provided with outer corrugations distributed along the radial direction of the outer pipe; a central pipe is provided at the inner center of the inner pipe, and a plurality of heat-conducting support plates distributed along the radial direction of the central pipe are evenly distributed on the central pipe in the circumferential direction, and the heat-conducting support plates pass through the inner pipe, the filling layer, the outer pipe and the pipe wall at the trough of the outer corrugation in sequence.

[0006] Optionally, the crest of the outer corrugation is a hollow structure. The outer corrugation of the hollow structure plays a buffering role. At the same time, the outer corrugation distributed along the radial direction of the outer pipe reduces the friction contact area, thereby reducing the wear caused by laying the pipeline.

[0007] Optionally, the central tube and the thermally conductive support sheet are integrally formed from thermally conductive polypropylene. This integral formation forms the "inner skeleton" of the MPP tube, ensuring the mechanical strength of the tube while also ensuring the heat dissipation capability of the tube.

[0008] Optionally, the thermal conductivity of the thermally conductive grade polypropylene material is not less than 5W / (m·K), to further ensure heat dissipation capability.

[0009] Optionally, the central tube is provided with a plurality of through holes, and the heat-conducting support sheet is provided with a plurality of through slots. By providing the through holes and through slots, the heat generated between the separated cables can be circulated, and the heat generated by each cable is quickly transferred to the outside of the tube body through the heat-conducting support sheet, without causing excessive local heat.

[0010] Optionally, the filling layer is filled with a heat-conducting and pressure-resistant material, so that the filling layer has heat-conducting and pressure-resistant functions.

[0011] Optionally, the heat-conducting and pressure-resistant material comprises graphene particles and glass fibers. The addition of graphene particles allows the heat-conducting and pressure-resistant material to have excellent thermal conductivity, while the addition of glass fibers allows the heat-conducting and pressure-resistant material to have sufficient mechanical strength.

[0012] Beneficial effects of the utility model:

[0013] This utility model improves the thermal conductivity of the entire tube by forming a heat-conducting, pressure-resistant filling layer between the inner and outer tubes. Combined with the central tube and the heat-conducting support sheet that sequentially passes through the inner tube and the filling layer, the thermal conductivity of the tube interior can be further improved, resulting in excellent thermal conductivity throughout the tube. Heat generated by the cables can be circulated through the through holes and slots and quickly transferred to the outside of the tube via the heat-conducting support sheet without causing excessive localized heat. Simultaneously, the central tube and the heat-conducting support sheet are integrally formed to form the "inner skeleton" of the entire MPP tube, ensuring the mechanical strength of the tube. The use of heat-conducting-grade polypropylene ensures the heat dissipation capacity of the "inner skeleton." BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the tube of the present utility model.

[0016] Among them, 1 is outer tube, 11 is outer corrugation, 2 is inner tube, 3 is filling layer, 4 is center tube, 41 is heat conductive support plate, 411 is through groove, and 42 is through hole. DETAILED DESCRIPTION

[0017] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and are only schematic diagrams, not actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the dimensions of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0018] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", "front", "back", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the figures. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0019] like Figure 1-Figure 2 As shown, a heat-conducting, pressure-resistant, enhanced MPP pipe of the present invention comprises an outer pipe 1 and an inner pipe 2, a filling layer 3 is provided between the outer pipe 1 and the inner pipe 2, and the outer pipe 1 is provided with an outer corrugation 11 distributed radially along the outer pipe 1; a central pipe 4 is provided at the inner center of the inner pipe 2, and the central pipe 4 is evenly distributed with a plurality of heat-conducting support plates 41 distributed radially along the central pipe 4 in the circumferential direction, and the heat-conducting support plates 41 sequentially penetrate the inner pipe 2, the filling layer 3, the outer pipe 1 and the pipe wall at the trough of the outer corrugation 11.

[0020] In this embodiment, the thermal conductive support plate 41 is made of thermal conductive grade polypropylene material, the inner tube 2 and the outer tube 2 are made of modified polypropylene material, and the filling layer 3 is made of thermal conductive and pressure-resistant material with polyethylene as the base material. The above materials all have thermal fusion properties, and the inner tube 2, the filling layer 3, the outer tube 1, and the thermal conductive support plate 41 are all fixedly connected by thermal fusion.

[0021] In this embodiment, the crests of the outer corrugations 11 are hollow structures. The outer corrugations 11 are configured as hollow structures, which can reduce the use of raw materials. The buffering effect of the hollow structure can better protect the inner tube 2. In addition, the outer corrugations 11 distributed radially along the outer tube 1, while improving the impact resistance and pressure resistance, can also play a protective role when the power cable is laid in the underground pipeline. Specifically, due to the traction of the machine, the MPP pipe inevitably rubs against the underground sand or soil. The outer corrugations 11 distributed radially along the outer tube 1 reduce the above-mentioned friction contact area, thereby reducing the wear on the pipeline. In extreme cases, even if the crests of the outer corrugations 11 are damaged, it will not affect the inner tube 2.

[0022] In this embodiment, the central tube 4 and the thermally conductive support sheet 41 are made of thermally conductive polypropylene and are integrally molded. The thermal conductivity of the thermally conductive polypropylene material is not less than 5 W / (m·K). The central tube 4 and the thermally conductive support sheet 41 are integrally molded, forming the "inner skeleton" of the entire MPP tube, ensuring the mechanical strength of the tube. The use of thermally conductive polypropylene also ensures the heat dissipation capability of the tube. For example, the thermally conductive polypropylene material is enhanced by adding thermally conductive fillers, such as one or more metal oxides (magnesium oxide, aluminum oxide), metal hydroxides (magnesium hydroxide, aluminum hydroxide), or metal foam (iron foam), to the polypropylene material to improve its thermal conductivity while maintaining both rigidity and toughness. Thermally conductive polypropylene is also commercially available, such as RTP Company's 100 Series thermally conductive PP.

[0023] In this embodiment, the central tube 4 is provided with a plurality of through holes 42, and the heat-conducting support sheet 41 is provided with a plurality of through slots 411. The through holes 42 and through slots 411 allow heat generated between the separated cables to flow freely. The heat generated by each cable is quickly transferred to the outside of the tube body through the heat-conducting support sheet 41, without causing excessive localized heat.

[0024] In this embodiment, filling layer 3 is filled with a thermally conductive, pressure-resistant material comprising graphene particles and glass fibers. For example, the thermally conductive, pressure-resistant material is based on polyethylene. The addition of graphene particles imparts excellent thermal conductivity to the thermally conductive, pressure-resistant material, while the addition of glass fibers imparts sufficient mechanical strength.

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

[0026] When the heat-conductive and pressure-resistant enhanced MPP pipe of the present invention is in use, the cables in the pipe body are separated by the central pipe 4 and the heat-conductive support sheet 41. By forming a heat-conductive and pressure-resistant filling layer 3 between the inner pipe 1 and the outer pipe 2, the thermal conductivity of the entire pipe body is improved. In conjunction with the central pipe 4 and the heat-conductive support sheet 41 that passes through the inner pipe 2 and the filling layer 3 in sequence, the thermal conductivity of the inside of the pipe body can be further improved, so that the entire pipe body has good thermal conductivity. The heat generated by each cable can be circulated through the through hole 42 and the through groove 411, and quickly transferred to the outside of the pipe body through the heat-conductive support sheet 41 without the occurrence of excessive local heat.

[0027] Furthermore, the radially distributed outer corrugations 11 along the outer tube 1 reduce the frictional contact area between the MPP tube and underground gravel or soil during installation, thereby reducing wear on the tube. Supported by the filling layer 3 and the thermally conductive support sheet 41, the outer tube 1 with its outer corrugations 11 offers enhanced resistance to external pressure shocks.

[0028] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalent substitutions shall be encompassed by the claims of the present invention. The techniques, shapes, and structural portions not described in detail in the present invention are well known.

Claims

1. A heat-conducting and pressure-resistant enhanced MPP pipe, comprising an outer pipe (1) and an inner pipe (2), characterized in that: A filling layer (3) is provided between the outer tube (1) and the inner tube (2); the outer tube (1) is provided with an outer corrugation (11) distributed radially along the outer tube (1); a central tube (4) is provided at the inner center of the inner tube (2); the central tube (4) is evenly distributed with a plurality of heat-conducting support sheets (41) distributed radially along the central tube (4) in the circumferential direction; the heat-conducting support sheets (41) sequentially penetrate the inner tube (2), the filling layer (3), the outer tube (1) and the tube wall at the trough of the outer corrugation (11).

2. The thermally conductive and pressure-resistant enhanced MPP pipe according to claim 1, characterized in that: The crest of the outer corrugation (11) is a hollow structure.

3. The thermally conductive and pressure-resistant enhanced MPP pipe according to claim 1, characterized in that: The central tube (4) and the heat-conducting support plate (41) are made of heat-conducting grade polypropylene material and are integrally formed.

4. The thermally conductive and pressure-resistant enhanced MPP pipe according to claim 3, characterized in that: The thermal conductivity of the thermal conductive grade polypropylene material is not less than 5W / (m·K).

5. The thermally conductive and pressure-resistant enhanced MPP pipe according to claim 1, characterized in that: The central tube (4) is provided with a plurality of through holes (42), and the heat-conducting support plate (41) is provided with a plurality of through slots (411).

6. The thermally conductive and pressure-resistant enhanced MPP pipe according to claim 1, characterized in that: The filling layer (3) is filled with heat-conducting and pressure-resistant material.

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