Anti-bending and anti-fracture insulating crepe paper tube

Abstract

The utility model discloses an anti-bending and anti-fracture insulating crepe paper tube which comprises a tube body, the tube body is composed of a lining layer, a reinforcing layer and an outer protective layer, the inner wall of the tube body is provided with arc-shaped supporting ribs, the outer wall of the tube body is provided with annular grooves and air holes, and the surface of the outer protective layer is provided with rough textures. Bending stress is dispersed through the arc-shaped supporting ribs, internal pressure is released through the annular grooves and the air holes, the overall strength is improved through the reinforcing layer, and abrasion resistance and installation stability are enhanced through the outer protective layer. The anti-bending and anti-fracture performance of the insulation crepe paper tube can be remarkably improved, meanwhile, installation convenience and use reliability are optimized, and the insulation crepe paper tube is suitable for insulation protection of electrical equipment such as high-voltage cables and transformers.

Description

Technical Field

[0001] This utility model belongs to the field of electrical insulation materials technology, specifically an insulating wrinkled paper tube that is resistant to bending and breakage. Background Technology

[0002] In the fields of power equipment and electrical engineering, insulating corrugated paper tubes, as an important insulating material, are widely used in high-voltage electrical equipment such as transformers and reactors. Their main functions are to provide mechanical support and electrical insulation to ensure the safety and reliability of equipment under high voltage, high temperature, and complex working environments. However, existing insulating corrugated paper tubes have some significant technical problems in practical use, particularly in terms of bending resistance and fracture resistance. Because electrical equipment may be subjected to external forces or vibrations during transportation, installation, or operation, traditional insulating corrugated paper tubes are prone to bending or even breakage due to external stress concentration, leading to a decrease in insulation performance and potentially causing equipment failure or safety accidents. Furthermore, existing insulating corrugated paper tubes typically employ a single material structure design, making it difficult to achieve a good balance between flexibility and strength, further limiting their application effectiveness under complex working conditions. Therefore, improving the bending resistance and fracture resistance of insulating corrugated paper tubes has become an urgent technical challenge. Developing a corrugated paper tube that combines high strength, good flexibility, and excellent insulation performance is of great significance for improving the reliability and service life of electrical equipment. Utility Model Content

[0003] This utility model belongs to the field of insulating materials, and in particular relates to an insulating wrinkled paper tube that is resistant to bending and breakage.

[0004] In electrical equipment, insulating corrugated paper tubes are commonly used for insulation protection of high-voltage cables, transformers, and other equipment. However, in actual use, due to external mechanical stress or improper installation, insulating corrugated paper tubes are prone to bending and even breakage. This not only reduces their insulation performance but may also lead to equipment malfunctions. Existing insulating corrugated paper tubes often improve bending resistance by increasing their thickness, but this method increases material costs and does not fundamentally solve the problems of bending and breakage. Therefore, designing an insulating corrugated paper tube that can effectively resist bending and prevent breakage has become an urgent technical problem to be solved.

[0005] The purpose of this utility model embodiment is to provide an insulating wrinkled paper tube that is resistant to bending and breakage, in order to solve the problems mentioned in the background art.

[0006] This utility model embodiment is implemented as follows: an insulating wrinkled paper tube resistant to bending and breakage includes a tube body, which, from the inside out, includes an inner lining layer, a reinforcing layer, and an outer protective layer. The inner lining layer is made of a polymer insulating material, the reinforcing layer has a fiber braided structure, and the outer protective layer is an elastic coating layer; it also includes:

[0007] Multiple arc-shaped support ribs are provided on the inner wall of the tube, and the arc-shaped support ribs are distributed at intervals along the axial direction of the tube. Both ends of each arc-shaped support rib are fixedly connected to the inner wall of the tube, and the protrusion direction of the arc-shaped support ribs faces the central axis of the tube. Multiple annular grooves are provided on the outer wall of the tube, and the annular grooves are evenly distributed along the axial direction of the tube. Each annular groove has a vent hole at its bottom. The surface of the outer protective layer is provided with micron-level rough texture, and the depth of the rough texture is 0.1mm to 0.3mm. The rough texture can enhance the friction of the outer protective layer to reduce slippage during installation.

[0008] Preferably, the fiber weave structure of the reinforcing layer is a cross-weave, the included angle between the fibers is 60° to 120°, the diameter of the fibers is 0.2 mm to 0.5 mm, the density of the fiber weave structure is 10 to 20 fibers per square centimeter, and the fibers are made of high-strength glass fiber or carbon fiber material.

[0009] Preferably, the cross-sectional shape of the arc-shaped support rib is semi-circular, the height of the arc-shaped support rib is 1 / 10 to 1 / 8 of the inner diameter of the tube, the material of the arc-shaped support rib is flexible polyurethane material, and the surface of the arc-shaped support rib is coated with a thermally conductive coating, which can quickly conduct the heat generated inside the tube to the outer wall.

[0010] Preferably, the width of the annular groove is 1 / 20 to 1 / 15 of the outer diameter of the tube body, the depth of the annular groove is 1 / 5 to 1 / 4 of the tube body wall thickness, the diameter of the vent hole is 0.5 mm to 1 mm, the distribution density of the vent hole is 5 to 8 per square centimeter, and the vent hole can effectively release the gas pressure inside the tube body.

[0011] Preferably, the elastic coating layer of the outer protective layer is made of silicone rubber material, the thickness of the elastic coating layer is 0.5mm to 1mm, and the surface rough texture of the elastic coating layer is formed by laser engraving process, with the spacing of the rough texture being 0.2mm to 0.5mm.

[0012] Preferably, both ends of the tube are provided with detachable end caps, the inner side of the end cap is provided with a sealing ring, the sealing ring is made of fluororubber, the end cap is connected to the tube through a threaded structure, and the outer side of the end cap is provided with anti-slip texture.

[0013] Preferably, a fluorescent marking strip is provided on the outer wall of the tube body. The fluorescent marking strip extends along the axial direction of the tube body and has a width of 5mm to 10mm. The fluorescent marking strip can improve the visibility of the tube body in low light environment.

[0014] The beneficial effects of the insulating wrinkled paper tube that is resistant to bending and breakage provided by this embodiment of the utility model are:

[0015] This invention effectively disperses externally applied bending stress by incorporating arc-shaped support ribs on the inner wall of the tube, significantly improving the tube's bending resistance. Simultaneously, the annular groove and vent design on the outer wall release internal pressure during installation or use, preventing rupture due to gas accumulation. Furthermore, the fiber-woven structure of the reinforcing layer further enhances the overall strength of the tube, while the elastic coating and rough texture of the outer protective layer improve wear resistance and installation stability. In summary, this invention, through multi-layered structural design and functional optimization, achieves a comprehensive improvement in bending resistance, breakage prevention, and ease of installation while ensuring insulation performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the anti-bending and anti-breakage insulating wrinkled paper tube provided in this embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the central tube.

[0018] The attached diagram is labeled as follows: 1. Pipe body; 2. Inner lining layer; 3. Reinforcing layer; 4. Outer protective layer; 5. Arc-shaped support rib; 6. Annular groove; 7. Ventilation hole; 8. Rough texture; 9. End cap; 10. Sealing ring; 11. Anti-slip texture; 12. Fluorescent marking strip. Detailed Implementation

[0019] This utility model provides an insulating corrugated paper tube that is resistant to bending and breakage. Its structural design and functional optimization can significantly improve the performance of the tube in electrical equipment. The following is in conjunction with the appendix... Figure 1 To be continued Figure 2 The specific embodiments of this utility model are described in detail with reference to the component numbers marked in the accompanying drawings. Figure 1 As shown, the overall structure of the insulating corrugated paper tube includes a tube body 1, which is provided with an inner lining layer 2, a reinforcing layer 3, and an outer protective layer 4 from the inside out. In addition, the inner wall of the tube body 1 is provided with multiple arc-shaped support ribs 5, and the outer wall is provided with an annular groove 6 and a vent hole 7. The surface of the outer protective layer 4 has a rough texture 8. The tube body 1 is also equipped with end caps 9 at both ends. The inner side of the end cap 9 is provided with a sealing ring 10, and the outer side is provided with anti-slip texture 11. At the same time, a fluorescent marking strip 12 is provided on the outer wall of the tube body 1.

[0020] Firstly Figure 2 Based on this, the layered structure of the pipe body 1 and the functional principles of each part are described in detail. The inner lining layer 2 of the pipe body 1 is made of a high-polymer insulating material. This type of material has excellent electrical insulation and heat resistance properties, effectively isolating the internal current from contact with the external environment, thus ensuring the basic function of the pipe body 1 as an insulating protection component in equipment such as high-voltage cables or transformers. The thickness of the inner lining layer 2 is adjusted according to the needs of the actual application scenario, usually between 0.5mm and 1mm, to ensure that the insulation performance requirements are met without increasing the overall weight due to excessive thickness. The reinforcing layer 3 is located on the outside of the inner lining layer 2. Its fiber braiding structure is achieved through cross-weaving, with the included angle between the fibers set between 60° and 120°. This design allows the fiber braiding structure to form a uniform distribution when subjected to external stress, thereby avoiding cracking problems caused by local stress concentration. The diameter of the fiber filaments is preferably 0.2 mm to 0.5 mm, with a density of 10 to 20 filaments per square centimeter. High-strength glass fiber or carbon fiber can be used, as these materials possess high tensile strength and fatigue resistance, further enhancing the overall rigidity and bending resistance of the tube body 1. The outer protective layer 4 is an elastic coating made of silicone rubber, with a thickness of 0.5 mm to 1 mm. It provides good cushioning under external mechanical impact or friction, while also possessing certain waterproof and corrosion-resistant properties. The surface of the outer protective layer 4 is formed with micron-level rough texture 8 through laser engraving, such as... Figure 2 As shown, the depth of the rough texture 8 is 0.1mm to 0.3mm and the spacing is 0.2mm to 0.5mm. This design not only improves the friction of the outer protective layer 4, but also effectively reduces the sliding phenomenon during installation, thereby improving the convenience and stability of installation.

[0021] Next, combine Figure 2 and Figure 1This document details the design of the arc-shaped support ribs 5 and the principle behind their enhanced bending resistance. The arc-shaped support ribs 5 are spaced apart along the axial direction of the tube body 1, with both ends of each rib fixedly connected to the inner wall of the tube body 1. Their cross-sectional shape is semi-circular, with the convex direction facing the central axis of the tube body 1. The height of the arc-shaped support ribs 5 is 1 / 10 to 1 / 8 of the inner diameter of the tube body 1. They are made of flexible polyurethane material, which possesses good elasticity and toughness, allowing for appropriate deformation under external bending stress. This absorbs and disperses stress, preventing direct stress on the inner wall of the tube body 1 and thus avoiding cracking. Furthermore, the surface of the arc-shaped support ribs 5 is coated with a thermally conductive coating. This coating rapidly conducts heat generated inside the tube body 1 due to electrical operation to the outer wall, which is then dissipated into the surrounding environment through the outer protective layer 4, thereby reducing the internal temperature of the tube body 1 and extending its service life. The distribution density of the arc-shaped support ribs 5 can be adjusted according to the actual usage scenario of the tube body 1. Typically, 3 to 5 arc-shaped support ribs 5 are set per 10cm length to ensure sufficient bending resistance under different working conditions.

[0022] The design of the annular groove 6 and the vent 7 on the outer wall of the tube 1, and their specific structure and functional implementation principle are as follows. Figure 2 As shown, the annular grooves 6 are uniformly distributed along the axial direction of the tube body 1, with a width of 1 / 20 to 1 / 15 of the outer diameter of the tube body 1 and a depth of 1 / 5 to 1 / 4 of the wall thickness of the tube body 1. This design can create a stress-relieving area under external force, avoiding localized cracking caused by stress concentration. Meanwhile, the vent holes 7 at the bottom of the annular grooves 6 have a diameter of 0.5 mm to 1 mm and a distribution density of 5 to 8 per square centimeter. In practical applications, when gas pressure increases inside the tube body 1 due to changes in air pressure or temperature rise, the vent holes 7 can promptly release the gas, thus avoiding the risk of cracking due to gas accumulation. Furthermore, the presence of the vent holes 7 can improve the airflow between the inside and outside of the tube body 1, aiding in heat dissipation and keeping the interior dry, thereby further improving the insulation performance of the tube body 1.

[0023] The specific structure and functional implementation principle of the end caps 9 at both ends of the tube body 1 are as follows: Figure 2 As shown. The end cap 9 is connected to the pipe body 1 via a threaded structure, facilitating disassembly and replacement. A sealing ring 10 is provided on the inner side of the end cap 9. The sealing ring 10 is made of fluororubber, a material with excellent high-temperature resistance and corrosion resistance, maintaining a good sealing effect even in extreme environments. The outer side of the end cap 9 is provided with anti-slip textures 11. The design of the anti-slip textures 11 improves the operator's grip stability when installing or removing the end cap 9, thereby reducing operational errors caused by slippage. Furthermore, the sealing ring 10 of the end cap 9 also prevents external dust, moisture, and other impurities from entering the pipe body 1, further ensuring the insulation performance and service life of the pipe body 1.

[0024] Finally, regarding the fluorescent marking strip 12 on the outer wall of the tube 1, its specific design and functional principle are as follows: The fluorescent marking strip 12 extends along the axial direction of the tube 1, with a width of 5mm to 10mm, and is made of a fluorescent material with good luminescent properties. In low-light environments, such as at night or in poorly lit equipment rooms, the fluorescent marking strip 12 can significantly improve the visibility of the tube 1, thereby facilitating operators to quickly locate and identify the position of the tube 1, reducing safety hazards caused by misoperation. Furthermore, the color and brightness of the fluorescent marking strip 12 can be customized according to actual needs to adapt to different working environments.

[0025] In summary, this invention, through multi-layered structural design and functional optimization, achieves a comprehensive improvement in bending resistance, breakage prevention, and ease of installation while ensuring insulation performance. In practical applications, such as during the installation of high-voltage cables, this insulating corrugated paper tube effectively resists bending and breakage caused by external mechanical stress and improper operation. Simultaneously, the design of the vent 7 and annular groove 6 releases internal pressure, avoiding the risk of rupture due to gas accumulation. Furthermore, the rough texture 8 of the outer protective layer 4 and the anti-slip texture 11 of the end cap 9 significantly improve the stability and convenience during installation, while the fluorescent marking strip 12 enhances the visibility of the tube 1 in low-light environments. Therefore, the insulating corrugated paper tube of this invention has broad application prospects and significant practical value in electrical equipment.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bend-resistant and break-resistant insulating corrugated paper tube, comprising a tube body (1), characterized in that, The tube body (1) includes, from the inside out, an inner lining layer (2), a reinforcing layer (3), and an outer protective layer (4). The inner lining layer (2) is made of a polymer insulating material, the reinforcing layer (3) is a fiber braided structure, and the outer protective layer (4) is an elastic coating layer. It also includes a plurality of arc-shaped support ribs (5) set on the inner wall of the tube body (1). The arc-shaped support ribs (5) are distributed at intervals along the axial direction of the tube body (1), and both ends of each arc-shaped support rib (5) are fixedly connected to the inner wall of the tube body (1). The protrusion direction of the arc-shaped support ribs (5) is towards the central axis of the tube body (1). A plurality of annular grooves (6) are provided on the outer wall of the tube body (1). The annular grooves (6) are evenly distributed along the axial direction of the tube body (1), and each annular groove (6) has a vent hole (7) at its bottom. The surface of the outer protective layer (4) is provided with micron-level rough texture (8), and the depth of the rough texture (8) is 0.1 mm to 0.3 mm.

2. The anti-bending and anti-breakage insulating wrinkled paper tube according to claim 1, characterized in that, The reinforcing layer (3) has a cross-woven fiber structure with an angle between the fibers of 60° to 120°, a diameter of 0.2 mm to 0.5 mm, and a fiber weaving density of 10 to 20 fibers per square centimeter. The fibers are made of high-strength glass fiber or carbon fiber.

3. The anti-bending and anti-breakage insulating wrinkled paper tube according to claim 2, characterized in that, The cross-sectional shape of the arc-shaped support rib (5) is semi-circular. The height of the arc-shaped support rib (5) is 1 / 10 to 1 / 8 of the inner diameter of the tube (1). The material of the arc-shaped support rib (5) is flexible polyurethane material, and the surface of the arc-shaped support rib (5) is coated with a thermally conductive coating.

4. The anti-bending and anti-breakage insulating wrinkled paper tube according to claim 3, characterized in that, The width of the annular groove (6) is 1 / 20 to 1 / 15 of the outer diameter of the tube body (1), the depth of the annular groove (6) is 1 / 5 to 1 / 4 of the wall thickness of the tube body (1), the diameter of the vent hole (7) is 0.5 mm to 1 mm, and the distribution density of the vent hole (7) is 5 to 8 per square centimeter.

5. The anti-bending and anti-breakage insulating wrinkled paper tube according to claim 4, characterized in that, The outer protective layer (4) has an elastic coating layer made of silicone rubber material. The thickness of the elastic coating layer is 0.5 mm to 1 mm. The surface rough texture (8) of the elastic coating layer is formed by laser engraving process. The spacing of the rough texture (8) is 0.2 mm to 0.5 mm.

6. The anti-bending and anti-breakage insulating wrinkled paper tube according to claim 5, characterized in that, Both ends of the tube body (1) are provided with detachable end caps (9). A sealing ring (10) is provided on the inner side of the end cap (9). The sealing ring (10) is made of fluororubber. The end cap (9) is connected to the tube body (1) through a threaded structure. Anti-slip texture (11) is provided on the outer side of the end cap (9).

7. The anti-bending and anti-breakage insulating wrinkled paper tube according to claim 6, characterized in that, A fluorescent identification strip (12) is provided on the outer wall of the tube (1). The fluorescent identification strip (12) extends along the axial direction of the tube (1) and the width of the fluorescent identification strip (12) is 5 mm to 10 mm.

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