Lightweight PVC power pipe

Abstract

The utility model relates to PVC electric power pipe technical field especially light weight PVC electric power pipe, including pipe body, the pipe body is composed of inner tube, outer tube and spiral reinforcing rib, the inner side of a plurality of spiral reinforcing rib is fixedly connected with the outer wall of inner tube, the outer side of a plurality of spiral reinforcing rib is fixedly connected with the inner wall of outer tube. Through the cooperation between pipe body, inner tube, outer tube, spiral reinforcing rib and annular reinforcing rib, the three-layer structure is formed by material function differentiation+structure mechanics optimization system advantage, the three-grade design of inner tube filler weight reduction, hollow reinforcing rib layer structure enhancement, outer tube protection makes pipe material weight to reduce 30% 40% compared with traditional product, and the compression strength is improved, effectively avoid the problem that traditional PVC electric power pipe exists weight is big, this not only increases the transportation cost, also brings the problem of the inconvenience of construction installation.

Description

Technical Field

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

[0002] With the acceleration of urbanization and the continuous improvement of power infrastructure, the demand for power pipes is increasing. PVC power pipes are widely used in power engineering due to their good corrosion resistance, insulation and certain strength. For example, an impact-resistant C-PVC power pipe with application number "202420477958.9" includes an inner layer, an impact-resistant layer and an outer layer arranged from the inside to the outside.

[0003] However, although it can improve the overall impact resistance of the pipe, traditional PVC power pipes are heavy, which not only increases transportation costs but also makes construction and installation inconvenient. Traditional PVC power pipes cannot meet the usage requirements. Utility Model Content

[0004] The purpose of this invention is to solve the problem that traditional PVC power pipes are too heavy, which not only increases transportation costs but also causes inconvenience to construction and installation. Therefore, a lightweight PVC power pipe is proposed.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a lightweight PVC power pipe, including a pipe body, which is composed of an inner pipe, an outer pipe and spiral reinforcing ribs. The inner side of multiple spiral reinforcing ribs is fixedly connected to the outer wall of the inner pipe, and the outer side of multiple spiral reinforcing ribs is fixedly connected to the inner wall of the outer pipe. Annular reinforcing ribs are fixedly connected at the intersections of the spiral reinforcing ribs.

[0007] Preferably, the inner and outer walls of the annular reinforcing rib are fixedly connected to the inner tube and the outer tube, respectively.

[0008] This feature involves adding a reinforcing rib structure to the hollow gap between the inner and outer tubes. The annular reinforcing ribs provide uniform circumferential support, greatly improving the ring stiffness of the tube. The spiral reinforcing ribs form a shear force transmission structure under axial load, improving impact resistance.

[0009] Preferably, retaining rings are installed on the inner sides of both ends of the inner and outer tubes.

[0010] This feature involves installing retaining rings at both ends of the inner and outer tubes to prevent dust or impurities from entering the reinforcing ribs and affecting their use.

[0011] Preferably, the inner walls of both the left and right sides of the outer wall of the retaining ring are machined with hand-holding grooves.

[0012] This feature involves machining hand grooves on both sides of the retaining ring, which facilitates the insertion of the retaining ring into the gap between the inner and outer tubes.

[0013] Preferably, the retaining ring, spiral reinforcing rib, and annular reinforcing rib form a three-dimensional support structure.

[0014] Preferably, the plurality of annular reinforcing ribs are equidistantly distributed on the inner wall of the outer tube.

[0015] This feature achieves uniform support for the entire pipe body through the equidistant installation of annular reinforcing ribs.

[0016] The lightweight PVC power pipe proposed in this utility model has the following advantages:

[0017] Through the coordination of the pipe body, inner pipe, outer pipe, spiral reinforcing ribs, and ring reinforcing ribs, the three-layer structure forms a system advantage through material function differentiation and structural mechanics optimization. The three-level design of inner pipe filler weight reduction, hollow reinforcing rib layer structure enhancement, and outer pipe protection reduces the weight of the pipe by 30%-40% compared to traditional products, while improving compressive strength. This effectively avoids the problem of the large weight of traditional PVC power pipes, which not only increases transportation costs but also brings inconvenience to construction and installation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the present utility model;

[0019] Figure 2 This utility model Figure 1 A schematic diagram of the structure excluding the outer tube;

[0020] Figure 3 This utility model Figure 2 A schematic diagram of the structure excluding the inner tube;

[0021] Figure 4 This utility model Figure 3 A schematic diagram of the structure with the retaining ring removed.

[0022] Figure 5 This utility model Figure 2 A schematic diagram of the structure viewed from below.

[0023] In the diagram: 1. Pipe body, 2. Inner pipe, 3. Outer pipe, 4. Retaining ring, 5. Hand groove, 6. Spiral reinforcing rib, 7. Annular reinforcing rib. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] See attached document Figure 1-5In this embodiment, a lightweight PVC power pipe includes a pipe body 1, which is composed of an inner pipe 2, an outer pipe 3, and spiral reinforcing ribs 6. The inner sides of multiple spiral reinforcing ribs 6 are fixedly connected to the outer wall of the inner pipe 2, and the outer sides of multiple spiral reinforcing ribs 6 are fixedly connected to the inner wall of the outer pipe 3. Annular reinforcing ribs 7 are fixedly connected at the intersections of the spiral reinforcing ribs 6. The inner and outer walls of the annular reinforcing ribs 7 are fixedly connected to the inner pipe 2 and the outer pipe 3, respectively. Retaining rings 4 are installed on the inner sides of the front and rear ends of the inner pipe 2 and the outer pipe 3. The retaining rings 4 can be installed by heat fusion or adhesive bonding, and can be removed by cutting with a knife if necessary. The inner walls of the left and right sides of the outer wall of the retaining rings 4 are machined with handle grooves 5, which facilitate the insertion of the retaining rings 4 into the gap between the inner pipe 2 and the outer pipe 3. The retaining rings 4, spiral reinforcing ribs 6, and annular reinforcing ribs 7 form a three-dimensional support structure, and multiple annular reinforcing ribs 7 are equidistantly distributed on the inner wall of the outer pipe 3.

[0026] The inner tube 2 and the retaining ring 4 are made of polyvinyl chloride resin as the base material, with 10%-30% by weight of lightweight filler (calcium carbonate / talc) added. They are formed into a composite tube through a blending modification process. The annular / spiral reinforcing ribs are evenly distributed at intervals to form a three-dimensional support structure. The material is polyvinyl chloride resin with 5%-10% carbon fiber added, which can greatly improve the strength and stiffness of the reinforcing ribs. The outer tube 3 is made of pure polyvinyl chloride resin extrusion with a surface roughness Ra≤1.6μm, forming a smooth and dense protective tube. The retaining ring 4 is used to prevent dust from entering the reinforcing ribs.

[0027] Working principle:

[0028] When this lightweight PVC power conduit is required for use, first follow the instructions... Figure 2 The production process is as shown in the figure. Specifically, in the production process, polyvinyl chloride resin and lightweight filler are first mixed in a certain proportion and added to an extruder to extrude the inner tube 2. Then, while extruding the inner tube 2, a hollow reinforcing rib layer is formed through a mold, namely the spiral reinforcing rib 6 and the annular reinforcing rib 7. Finally, the outer tube 4 is extruded to form a complete tube body 1.

[0029] The tube body 1 in this case adopts a sandwich composite structure design, which consists of an inner tube, a hollow reinforcing rib layer, and an outer tube, forming a functional system in synergy.

[0030] 1. Inner tube

[0031] Material characteristics: The inner tube 2 and the retaining ring 4 are made of polyvinyl chloride resin as the base material, with 10%-30% by weight of lightweight filler (calcium carbonate / talc) added, and are formed into a composite tube through a blending modification process.

[0032] Core function:

[0033] Basic functional guarantee: The polyvinyl chloride resin body provides excellent electrical insulation properties (volume resistivity ≥ 1×10⁻⁶). 13The Ω·cm) and chemical corrosion resistance (no change after ≥96h in acid and alkali solutions) meet the core requirements for power cable protection.

[0034] Lightweight design: The addition of lightweight fillers reduces the material density, achieving a 20%-30% weight optimization while maintaining tensile strength.

[0035] Interface bonding: The inner tube and the hollow tube form a chemical bonding interface through melt co-extrusion, ensuring effective load transfer between the tubes.

[0036] 2. Hollow reinforcing rib layer

[0037] Spatial structure: The ring / spiral reinforcing ribs are evenly distributed at intervals to form a three-dimensional support structure. The material is polyvinyl chloride resin with 5%-10% carbon fiber added, which can greatly improve the strength and stiffness of the reinforcing ribs.

[0038] Mechanical strengthening mechanism:

[0039] Improved compressive strength: The annular reinforcing rib 7 provides uniform circumferential support, greatly improving the ring stiffness of the pipe; the spiral reinforcing rib 6 forms a shear force transmission structure under axial load, improving impact resistance.

[0040] Weight optimization: The hollow structure reduces material usage by 50%-60%, and compared to solid pipe walls, the weight of pipes of the same specifications is reduced by 35%-45%.

[0041] 3. Outer tube

[0042] Surface characteristics: The outer tube 3 is made of pure polyvinyl chloride resin extrusion, with a surface roughness Ra≤1.6μm, forming a smooth and dense protective tube.

[0043] Engineering application value:

[0044] Construction convenience: The smooth surface reduces the coefficient of friction of the pipe, reduces the resistance to threading, and improves construction efficiency.

[0045] Environmental adaptability: The outer tube has no filler added, maintaining the original weather resistance of PVC and resisting external environmental erosion such as ultraviolet rays and humidity.

[0046] The three-layer structure leverages material function differentiation and structural mechanics optimization to create system advantages. The three-level design—inner tube filler weight reduction, hollow reinforcing rib structure enhancement, and outer tube protection—reduces the weight of the pipe by 30%-40% compared to traditional products, while simultaneously increasing compressive strength. This effectively avoids the problem of excessive weight associated with traditional PVC power pipes, which not only increases transportation costs but also brings inconvenience to construction and installation.

[0047] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A lightweight PVC power pipe, comprising a pipe body (1), characterized in that: The tube body (1) is composed of an inner tube (2), an outer tube (3) and spiral reinforcing ribs (6). The inner side of multiple spiral reinforcing ribs (6) is fixedly connected to the outer wall of the inner tube (2), and the outer side of multiple spiral reinforcing ribs (6) is fixedly connected to the inner wall of the outer tube (3). Annular reinforcing ribs (7) are fixedly connected at the intersection of the spiral reinforcing ribs (6).

2. The lightweight PVC electrical power tube according to claim 1, characterized in that: The inner and outer walls of the annular reinforcing rib (7) are fixedly connected to the inner tube (2) and the outer tube (3), respectively.

3. The lightweight PVC electrical power tube according to claim 1, wherein: The inner tube (2) and the outer tube (3) are fitted with retaining rings (4) on the inner sides of their front and rear ends.

4. The lightweight PVC electrical power tube according to claim 3, characterized in that: The inner walls of the left and right sides of the outer wall of the retaining ring (4) are all machined with handle grooves (5).

5. The lightweight PVC electrical power tube according to claim 4, characterized in that: The retaining ring (4), spiral reinforcing rib (6) and annular reinforcing rib (7) form a three-dimensional support structure.

6. The lightweight PVC electrical power tube of claim 1, wherein: The multiple annular reinforcing ribs (7) are equidistantly distributed on the inner wall of the outer tube (3).

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