Plastic-coated PVC (polyvinyl chloride) wire pipe with multi-layer protection

Abstract

The utility model relates to the technical field of cable protection, and discloses a multi-layer protection plastic-coated PVC wire pipe, which comprises a metal hose, a buffer layer, a flame-retardant layer and a sheath are sequentially arranged outside the metal hose from inside to outside, an insulating layer is arranged inside the metal hose, a central column is arranged at the center of the interior of the insulating layer, and the central column is connected with the metal hose. The side surface of the central column is fixedly connected with a plurality of barrier strips connected to the inner wall of the insulating layer. According to the utility model, the central column is matched with the barrier strips to divide the interior of the metal hose into five accommodating cavities, so that the cables do not influence each other in the metal hose, the insulating layer is arranged to effectively prevent the occurrence of current leakage or short circuit phenomenon, the buffer layer can further improve the anti-pressure ability of the wire pipe, and the wire pipe is safer and more practical.

Description

Technical Field

[0001] This utility model relates to the field of cable protection technology, specifically a multi-layered protective PVC-coated conduit. Background Technology

[0002] PVC-coated conduit, also known as PVC-coated metal flexible conduit, is a type of protective conduit for electrical wires and cables. It is made by coating the walls of stainless steel or galvanized metal flexible conduits with a layer of polyvinyl chloride (PVC) material suitable for cables, following the contours of the conduit's core. This structure gives it excellent properties such as light weight, good flexibility, high connection strength with accessories, and good electrical performance. It is widely used in industries such as power, chemical, metallurgy, light industry, and machinery, primarily for protecting electrical wires, cables, and signal lines in automated instruments. During production and processing, cables can be threaded into the conduit and fitted with appropriate connectors to achieve the purpose of protecting the cables.

[0003] While traditional PVC-coated conduit can protect wires and cables from damage by the external environment to some extent, its compressive strength and insulation performance are often insufficient when facing extreme environments or special application scenarios. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing PVC-coated conduits have insufficient compressive strength and insulation performance when facing extreme environments or special application scenarios.

[0005] To solve the above problems, the technical solution of this utility model is: a multi-layer protective PVC-coated conduit, including a metal flexible conduit, wherein the outer surface of the metal flexible conduit is provided with a buffer layer, a flame-retardant layer and a sheath from the inside to the outside, and the inner surface of the metal flexible conduit is provided with an insulation layer, wherein a central post is provided at the center of the insulation layer, and a plurality of baffles connected to the inner wall of the insulation layer are fixed to the side of the central post.

[0006] Furthermore, the buffer layer has several through holes in the middle, and the buffer layer is made of plastic.

[0007] Furthermore, the sheath includes a sheath body, the outer side of which is provided with a corrosion-resistant layer and an anti-ultraviolet layer. The sheath body is made of PVC, the corrosion-resistant layer is made of CPE, and the anti-ultraviolet layer is made of PVC with added ultraviolet stabilizers.

[0008] Furthermore, the multiple baffles are integrally formed with the central column and are made of the same material, namely a flexible rubber material with flame-retardant properties.

[0009] Furthermore, the insulating layer is made of XLPE material.

[0010] Furthermore, the end of the baffle is fixed to the inner wall of the insulation layer with an adhesive.

[0011] Furthermore, there are five baffles, which divide the interior of the metal hose into five identical cavities for storing cables.

[0012] The advantages of this utility model compared with the existing technology are as follows: This utility model divides the interior of the metal hose into five accommodating chambers by using a central column and a baffle, so that the cables do not affect each other inside the metal hose. The insulation layer effectively prevents current leakage or short circuits, and the buffer layer further enhances the pressure resistance of the conduit. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present invention.

[0014] Figure 2 This is a structural diagram of the buffer layer of this utility model.

[0015] Figure 3 This is a structural diagram of the sheath of this utility model.

[0016] As shown in the figure: 1. Metal flexible hose; 2. Buffer layer; 3. Flame retardant layer; 4. Sheath; 4.1. Sheath body; 4.2. Corrosion resistant layer; 4.3. UV resistant layer; 5. Insulation layer; 6. Center post; 7. Stop bar. Detailed Implementation

[0017] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 3 As shown, a multi-layered protective PVC-coated conduit includes a metal flexible tube 1. The metal flexible tube 1 has a buffer layer 2, a flame-retardant layer 3, and a sheath 4 arranged sequentially from the inside to the outside. The buffer layer is made of plastic and has several through holes in the middle. The sheath 4 includes a sheath body 4.1. The outer side of the sheath body 4.1 is provided with a corrosion-resistant layer 4.2 and an anti-ultraviolet layer 4.3. The sheath body 4.1 is made of PVC, the corrosion-resistant layer 4.2 is made of CPE, and the anti-ultraviolet layer 4.3 is made of PVC with added ultraviolet stabilizers.

[0019] like Figure 1As shown, the metal flexible hose 1 has an internal insulation layer 5 made of XLPE material, and a central post 6 is located at the center of the internal part. Five baffles 7 are fixed to the side of the central post 6 and connected to the inner wall of the insulation layer 5. The five baffles 7 are integrally formed with the central post 6 and are made of the same material, which is a flexible rubber material with flame retardant properties. The ends of the baffles 7 are fixed to the inner wall of the insulation layer 5 by adhesive. The five baffles 7 divide the interior of the metal flexible hose 1 into five identical cavities for storing cables.

[0020] In practical use, the central column 6, together with the baffle 7, divides the interior of the metal hose 1 into five accommodating chambers, ensuring that the cables do not interfere with each other within the metal hose 1 and guaranteeing stable cable transmission within the conduit. The insulation layer 5 enhances the insulation performance between the cable and the metal hose 1, effectively preventing current leakage or short circuits. Simultaneously, the metal hose 1 increases the mechanical strength of the conduit, preventing damage caused by external pressure or impact. The flame-retardant layer 5 improves the fire resistance of the conduit, effectively preventing the spread of fire. The buffer layer 2 further enhances the conduit's compressive strength. The sheath body 4.1, corrosion-resistant layer 4.2, and UV-resistant layer 4.3 protect the conduit from external environmental corrosion, such as ultraviolet rays, rainwater, acids, and alkalis.

[0021] The multi-layer protective PVC-coated wire conduit of the present invention achieves comprehensive protection for wires and cables through the multi-layer structure, improving the mechanical strength, wear resistance, corrosion resistance and fire retardant performance of the wire conduit. The inner insulation layer effectively prevents current leakage or short circuits, and the buffer layer further enhances the conduit's compressive strength.

[0022] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0025] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-layered protective PVC-coated conduit, comprising a flexible metal conduit (1), characterized in that: The metal hose (1) is provided with a buffer layer (2), a flame retardant layer (3) and a sheath (4) from the inside to the outside. The metal hose (1) is provided with an insulation layer (5) inside. A central post (6) is provided at the center of the insulation layer (5). Multiple baffles (7) connected to the inner wall of the insulation layer (5) are fixed to the side of the central post (6).

2. The multi-layer protective PVC-coated conduit according to claim 1, characterized in that: The buffer layer (2) has several through holes in the middle.

3. The multi-layer protective PVC-coated conduit according to claim 1, characterized in that: The sheath (4) includes a sheath body (4.1), and the outer side of the sheath body (4.1) is provided with a corrosion-resistant layer (4.2) and an anti-ultraviolet layer (4.3).

4. The multi-layer protective PVC-coated conduit according to claim 1, characterized in that: Multiple baffles (7) are integrally formed with the central column (6) and are made of the same material, which is a flexible rubber material with flame-retardant properties.

5. The multi-layer protective PVC-coated conduit according to claim 4, characterized in that: The end of the baffle (7) is fixed to the inner wall of the insulating layer (5) by an adhesive.

6. The multi-layer protective PVC-coated conduit according to claim 5, characterized in that: The five baffles (7) divide the interior of the metal hose (1) into five identical cavities for storing cables.

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