PVC electrical conduit with external reinforcing ribs

Abstract

The utility model discloses an external reinforcing rib PVC electrical conduit, which comprises a core tube, a reinforcing outer tube is arranged on the surface of the core tube, external spiral reinforcing ribs are uniformly arranged on the surface of the reinforcing outer tube, the external spiral reinforcing ribs comprise thick spiral ribs and thin spiral ribs, and the thin spiral ribs are positioned between two adjacent thick spiral ribs; a flame-retardant inner pipe is arranged on the inner wall of the core pipe, and inner spiral reinforcing ribs are evenly arranged on the inner wall of the flame-retardant inner pipe. The reinforcing ribs of the three-dimensional structure are designed and are spiral, so that the axial structural strength is improved, the circumferential structural strength is also improved, and the compression resistance effect is improved; the outer spiral reinforcing rib comprises a thick spiral rib and a thin spiral rib, so that the surface area can be increased, the adhesive force with concrete is increased, and hollowing and cracking of the concrete are prevented; the friction resistance can be reduced by reducing the contact area between the internal spiral reinforcing ribs and the threading wire, the threading wire in the early stage and the threading wire in the later stage are convenient, the wiring difficulty is reduced, the flame retardant effect can be improved by arranging the ceramic coating, and the use is safer.

Description

Technical Field

[0001] This utility model relates to the field of PVC pipe technology, specifically to a reinforced PVC electrical conduit. Background Technology

[0002] PVC electrical conduit is a building insulation conduit made primarily of polyvinyl chloride resin, widely used in building electrical engineering. PVC electrical conduit comes in red and blue, used for laying high-voltage and low-voltage wires respectively, facilitating identification and maintenance, preventing electric shock hazards, and resolving interference issues between high-voltage and low-voltage wires. Common specifications include DN16-DN32, with different specifications suitable for different wiring scenarios and needs.

[0003] With increasing demands for aesthetic appeal in interior design, electrical wiring is now typically installed underground and within walls. Therefore, special attention must be paid to the compressive strength of PVC electrical conduits. Currently, the most popular type of electrical conduit on the market is a round tube with smooth inner and outer walls. Improving the compressive strength of this type of smooth-walled PVC conduit can only be achieved through material modifications, which is quite challenging. Some manufacturers are designing PVC electrical conduits with structurally enhanced compressive strength, among which reinforcing ribs are a good option. To meet market demand and improve structural strength, our company has also designed and proposed a new type of externally reinforced PVC electrical conduit. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an externally reinforced PVC electrical conduit to improve structural strength and compressive strength.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A reinforced PVC electrical conduit includes a core tube, a reinforcing outer tube on the surface of the core tube, and an outer spiral reinforcing rib evenly distributed on the surface of the outer tube. The outer spiral reinforcing rib includes coarse spiral ribs and fine spiral ribs, with the fine spiral ribs located between two adjacent coarse spiral ribs.

[0007] The inner wall of the core tube is provided with a flame-retardant inner tube, and the inner wall of the flame-retardant inner tube is uniformly provided with inner spiral reinforcing ribs.

[0008] Preferably, the reinforcing outer tube, the outer spiral reinforcing rib, the flame-retardant inner tube, and the inner spiral reinforcing rib are integrated with the core tube.

[0009] Preferably, the number of coarse spiral ribs is less than the number of fine spiral ribs, and the spacing between the coarse spiral ribs and the fine spiral ribs, as well as the distance between two adjacent fine spiral ribs, are equal.

[0010] Preferably, the coarse spiral ribs, fine spiral ribs, and inner spiral reinforcing ribs all have the same spiral direction and pitch.

[0011] Preferably, the inner spiral reinforcing rib is staggered with the outer spiral reinforcing rib, and the inner spiral reinforcing rib is located between two adjacent thin spiral ribs and between the thin spiral rib and the thick spiral rib.

[0012] Preferably, the inner wall of the flame-retardant inner tube and the surface of the inner spiral reinforcing rib are both provided with a ceramic coating.

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

[0014] (1) This utility model sets external spiral reinforcing ribs and internal spiral reinforcing ribs on the surface and inside of the core tube and the flame-retardant inner tube respectively. By designing a three-dimensional reinforcing rib that is spiral, it not only improves the axial structural strength but also the circumferential structural strength, thereby improving the compressive strength and achieving the purpose of improving structural strength and compressive strength.

[0015] (2) The external spiral reinforcing bar of this utility model includes coarse spiral bars and fine spiral bars. While improving compressive strength and structural strength, it can also increase surface area. During construction, it increases the adhesion to concrete in the underground and inside the wall, preventing concrete from hollowing and cracking.

[0016] (3) The flame-retardant inner tube of this utility model is provided with an inner spiral reinforcing rib, which can reduce frictional resistance by reducing the contact area with the wire, making it easier to thread the wire in the early stage and replace the wire later, reducing the difficulty of wiring. By setting a ceramic coating, the flame-retardant effect can be improved, making it safer to use. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A partial structural diagram of the corresponding position of the core tube.

[0019] In the diagram: 1. Core tube; 2. Reinforced outer tube; 3. Outer spiral reinforcing rib; 301. Coarse spiral rib; 302. Fine spiral rib; 4. Flame-retardant inner tube; 5. Inner spiral reinforcing rib; 6. Ceramic coating. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-2 As shown, this utility model provides a technical solution: a reinforced PVC electrical conduit, comprising a core tube 1, a reinforcing outer tube 2 disposed on the surface of the core tube 1, and a flame-retardant inner tube 4 disposed on the inner wall of the core tube 1. Flame retardants such as aluminum hydroxide are added to the PVC material of the flame-retardant inner tube 4 to improve the fireproof and flame-retardant effect.

[0022] The surface of the outer tube 2 is uniformly provided with outer spiral reinforcing ribs 3. The outer spiral reinforcing ribs 3 include coarse spiral ribs 301 and fine spiral ribs 302. The fine spiral ribs 302 are located between two adjacent coarse spiral ribs 301. The number of coarse spiral ribs 301 is less than the number of fine spiral ribs 302. The spacing between coarse spiral ribs 301 and fine spiral ribs 302 and the distance between two adjacent fine spiral ribs 302 are equal.

[0023] The inner wall of the flame-retardant inner tube 4 is uniformly provided with inner spiral reinforcing ribs 5. The direction of rotation and pitch of the coarse spiral ribs 301, the fine spiral ribs 302 and the inner spiral reinforcing ribs 5 are the same. The inner spiral reinforcing ribs 5 are staggered with the outer spiral reinforcing ribs 3, and the inner spiral reinforcing ribs 5 are located between two adjacent fine spiral ribs 302 and between the fine spiral ribs 302 and the coarse spiral ribs 301.

[0024] The inner wall of the flame-retardant inner tube 4 and the surface of the inner spiral reinforcing rib 5 are both provided with a ceramic coating 6. The outer reinforcing tube 2, the outer spiral reinforcing rib 3, the flame-retardant inner tube 4 and the inner spiral reinforcing rib 5 are integrated with the core tube 1 and are extruded together during production, which facilitates efficient production.

[0025] Working principle:

[0026] The outer spiral reinforcing rib 3 and the inner spiral reinforcing rib 5 are designed with a three-dimensional structure and are spiral in shape, which can effectively improve the axial and circumferential structural strength, thereby improving the compressive strength. The outer spiral reinforcing rib 3 includes a coarse spiral rib 301 and a fine spiral rib 302, which increases the roughness and increases the surface area. During construction, it increases the adhesion to concrete in the underground and wall, which can effectively prevent concrete hollowing and cracking. The inner spiral reinforcing rib 5 reduces the contact area with the wire, which can reduce the frictional resistance, facilitate the initial wire pulling and the later wire replacement, and reduce the difficulty of wiring. The flame-retardant inner tube 4 and the ceramic coating 6 can improve the flame-retardant effect and make it safer to use.

[0027] It should be noted that, in this document, terms such as “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.

[0028] 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.

Claims

1. A reinforced PVC electrical conduit, comprising a core tube (1), characterized in that: The core tube (1) is provided with a reinforcing outer tube (2), and the surface of the reinforcing outer tube (2) is uniformly provided with an outer spiral reinforcing rib (3). The outer spiral reinforcing rib (3) includes a coarse spiral rib (301) and a fine spiral rib (302). The fine spiral rib (302) is located between two adjacent coarse spiral ribs (301). The inner wall of the core tube (1) is provided with a flame-retardant inner tube (4), and the inner wall of the flame-retardant inner tube (4) is uniformly provided with inner spiral reinforcing ribs (5).

2. The externally reinforced PVC electrical conduit according to claim 1, characterized in that: The outer reinforcing tube (2), outer spiral reinforcing rib (3), flame-retardant inner tube (4) and inner spiral reinforcing rib (5) are integrated with the core tube (1).

3. The externally reinforced PVC electrical conduit according to claim 1, characterized in that: The number of coarse spiral ribs (301) is less than the number of fine spiral ribs (302), and the spacing between the coarse spiral ribs (301) and the fine spiral ribs (302) and the distance between two adjacent fine spiral ribs (302) are equal.

4. The externally reinforced PVC electrical conduit according to claim 1, characterized in that: The coarse spiral rib (301), the fine spiral rib (302), and the inner spiral reinforcing rib (5) all have the same spiral direction and pitch.

5. The externally reinforced PVC electrical conduit according to claim 1, characterized in that: The inner spiral reinforcing rib (5) is offset from the outer spiral reinforcing rib (3), and the inner spiral reinforcing rib (5) is located between two adjacent thin spiral ribs (302) and between the thin spiral rib (302) and the thick spiral rib (301).

6. The externally reinforced PVC electrical conduit according to claim 1, characterized in that: The inner wall of the flame-retardant inner tube (4) and the surface of the inner spiral reinforcing rib (5) are both provided with a ceramic coating (6).

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