A thin-umbrella type railway rod insulator

Abstract

The utility model relates to insulator technical field discloses a thin umbrella type railway rod insulator, including the core rod for supporting integral structure, a plurality of groups of umbrella skirts are fixedly connected to the core rod outside, and the spacing between the plurality of groups of umbrella skirts is same, the first connecting fitting and second connecting fitting are fixedly connected to the both ends of core rod, this insulator adopts the core rod made of basalt fiber reinforced polyimide composite material, the thin umbrella type umbrella skirt made of graphene modified high temperature vulcanized silica rubber and titanium alloy connecting fitting, keeps the light weight advantage of thin umbrella type structure, improves the mechanical strength, the ageing resistance, the insulation performance and the corrosion resistance of insulator significantly, prolongs its service life in complex railway environment, has very high practical value.

Description

Technical Field

[0001] This utility model relates to the field of insulator technology, specifically to a thin umbrella-shaped railway rod insulator. Background Technology

[0002] As a key component of railway electrification systems, railway insulators directly affect the safe and stable operation of the system. Although existing thin umbrella-type railway rod insulators have achieved lightweighting in structure, the traditional materials used are no longer sufficient to meet the increasingly stringent requirements of railway operating environments in terms of mechanical strength, aging resistance, and insulation performance. Traditional core rods mostly use glass fiber reinforced epoxy resin, which is prone to aging under long-term high temperature and high humidity environments, resulting in a significant decrease in mechanical strength; the high-temperature vulcanized silicone rubber commonly used in sheds has poor flashover resistance and is prone to cracking under extreme temperature differences; the connecting hardware is mostly hot-dip galvanized steel, which is heavy and has limited corrosion resistance, affecting the overall service life of the insulator.

[0003] Therefore, those skilled in the art provide a thin umbrella-shaped railway rod insulator to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a thin umbrella-shaped railway rod insulator to solve the problem of insufficient material performance in existing thin umbrella-shaped railway rod insulators.

[0005] This utility model provides the following technical solution: a thin umbrella-shaped railway rod insulator, including a core rod for supporting the overall structure, a plurality of sets of umbrella skirts fixedly connected to the outside of the core rod, and the plurality of sets of umbrella skirts are spaced at the same distance, and a first connecting hardware and a second connecting hardware are fixedly connected to both ends of the core rod.

[0006] As a preferred embodiment of the above technical solution, the thin umbrella-shaped skirt is made of graphene-modified high-temperature vulcanized silicone rubber material, and the amount of graphene added in the graphene-modified high-temperature vulcanized silicone rubber is 0.5%-2%.

[0007] As a preferred embodiment of the above technical solution, the first and second connecting fittings are made of titanium alloy material, and the connecting fittings are fixedly connected to the mandrel by nano-level adhesive.

[0008] As a preferred embodiment of the above technical solution, the volume fraction of basalt fiber in the mandrel is 50%-60%.

[0009] As a preferred embodiment of the above technical solution, the thickness of the thin umbrella-shaped skirt is 1.2-2.5mm, and the maximum diameter is 90-140mm.

[0010] As a preferred embodiment of the above technical solution, the spacing between two adjacent thin umbrella-shaped skirts is 1 / 4 to 1 / 3 of the maximum diameter of the thin umbrella-shaped skirt.

[0011] As a preferred embodiment of the above technical solution, the mandrel has a diameter of 18-28mm and a length of 700-1400mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The mandrel of this invention is made of basalt fiber reinforced polyimide composite material, which has higher mechanical strength, wider temperature range and lighter weight than traditional materials, and can maintain stable support and insulation performance for a long time in extreme railway environments. Based on the above-mentioned beneficial effects, the umbrella skirt of this utility model uses graphene-modified high-temperature vulcanized silicone rubber, which significantly improves the insulation performance, aging resistance and flashover resistance, extends the service life of the umbrella skirt and reduces maintenance costs.

[0013] The connecting fittings are made of titanium alloy and combined with nano-grade adhesives, which reduces weight while improving the corrosion resistance and connection strength of the connection points, thus enhancing the overall reliability of the insulator. The combination of material innovation and a thin umbrella-shaped structural design achieves a better balance between lightweight, high strength, and high insulation performance, meeting the development needs of modern high-speed railways and increasingly complex environments. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a thin umbrella-shaped railway rod insulator; Figure 2 A schematic diagram of the cross-sectional structure of a thin umbrella-shaped railway rod insulator; Figure 3 A schematic diagram of the top structure of a thin umbrella-shaped railway rod insulator; Figure 4 This is a schematic diagram of the bottom structure of a thin umbrella-shaped railway rod insulator.

[0015] In the diagram: 1. Core rod; 2. Thin umbrella-shaped skirt; 3. First connecting hardware; 4. Second connecting hardware. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please see Figures 1-2As shown, this utility model provides a technical solution: a thin umbrella-shaped railway rod insulator, including a core rod 1 for supporting the overall structure, a plurality of umbrella skirts 2 fixedly connected to the outside of the core rod 1, and the spacing between the plurality of umbrella skirts 2 is the same, and a first connecting hardware 3 and a second connecting hardware 4 are fixedly connected to both ends of the core rod 1.

[0018] Core rod 1, as the supporting core of the overall structure, provides a stable skeleton for the insulator, ensuring its stable support for components such as the contact network in the complex environment of railways and resisting the influence of external forces such as vibration and wind. It can not only ensure sufficient insulation distance to effectively block the current leakage path, but also reduce the accumulation of pollutants such as rainwater and dust on the surface, improving the flashover resistance. The first connecting hardware 3 and the second connecting hardware 4 at both ends of core rod 1, together with titanium alloy and nano-grade adhesive, can achieve a firm connection with the contact network support and other equipment in the railway electrification system, ensuring the overall installation stability of the insulator and avoiding the impact of loose connections on the safe operation of the system.

[0019] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, the first connecting fitting 3 and the second connecting fitting 4 are made of titanium alloy, and the connecting fittings are fixedly connected to the mandrel 1 by nano-level adhesive.

[0020] Compared to traditional high-temperature vulcanized silicone rubber, it is less prone to cracking under extreme temperature differences and can better cope with complex conditions such as temperature fluctuations in the railway environment. The addition of graphene increases the volume resistivity of the umbrella skirt 2 material by 1-2 orders of magnitude and reduces the dielectric loss tangent by more than 30%. At the same time, its aging resistance is enhanced. After 1000 hours of heat aging test at 150℃, the tensile strength retention rate is still above 90%, and the surface hydrophobicity is excellent, with the flashover voltage increased by 20%-30%.

[0021] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, the first connecting fitting 3 and the second connecting fitting 4 are made of titanium alloy, and the connecting fittings are fixedly connected to the mandrel 1 by nano-level adhesive.

[0022] The titanium alloy connecting hardware is made of TC4 titanium alloy, which has a density of only about 60% of that of hot-dip galvanized steel, a tensile strength of over 900MPa, and excellent corrosion resistance. No obvious corrosion was observed in the salt spray test after 1000 hours.

[0023] The nano-grade adhesive uses nano-alumina modified epoxy resin adhesive, which has a shear strength of over 30MPa, ensuring a firm connection between the fittings and the mandrel, and also has good resistance to high and low temperatures.

[0024] As one implementation method in this embodiment, please refer to Figures 1-2As shown, the volume fraction of basalt fiber in mandrel 1 is 50%-60%.

[0025] Basalt fiber has higher strength and temperature resistance than glass fiber. When combined with a polyimide matrix, it can maintain good mechanical properties in a temperature range of -200℃ to 260℃, with a bending strength of over 800MPa, which is significantly better than traditional glass fiber reinforced epoxy resin mandrels.

[0026] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, the umbrella skirt 2 has a thickness of 1.2-2.5mm and a maximum diameter of 90-140mm.

[0027] Compared to the traditional thin umbrella structure, it is further thinned, achieving a better lightweight effect while ensuring the insulation distance.

[0028] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, the spacing between two adjacent umbrella skirts 2 is 1 / 4 to 1 / 3 of the maximum diameter of the umbrella skirt 2.

[0029] By combining the self-cleaning properties of graphene-modified materials, the accumulation of pollutants can be reduced more effectively, thus improving the pollution resistance of insulators.

[0030] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, the diameter of mandrel 1 is 18-28mm and the length is 700-1400mm.

[0031] It is adaptable to the installation requirements of different railway electrification systems, and its weight is 15%-20% lighter than that of traditional mandrels within the same size.

[0032] Working principle: In the manufacturing process, basalt fiber and polyimide resin are first wound into a core rod through a winding molding process. Then, graphene and high-temperature vulcanized silicone rubber are mixed and then injection molded to form several umbrella skirts on the outside of the core rod. Finally, the first and second TC4 titanium alloy connecting fittings are fixed to both ends of the core rod with nano-alumina modified epoxy resin adhesive. After curing, the finished product is obtained. In use, it is connected to the contact wire support and other equipment in the railway electrification system through the connecting fittings at both ends, which can achieve stable support and reliable insulation of the contact wire under various complex climatic conditions.

[0033] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A thin umbrella-shaped railway rod insulator, characterized in that: Includes a core rod (1) for supporting the overall structure, with several sets of thin umbrella-shaped skirts (2) fixedly connected to the outside of the core rod (1), and the spacing between the several sets of thin umbrella-shaped skirts (2) is the same. The core rod (1) is fixedly connected to a first connecting hardware (3) and a second connecting hardware (4) at both ends. The thin umbrella-shaped skirt (2) is made of graphene-modified high-temperature vulcanized silicone rubber material; The first connecting fitting (3) and the second connecting fitting (4) are made of titanium alloy material, and the connecting fitting and the mandrel (1) are fixedly connected by nano-level adhesive.

2. The thin umbrella-shaped railway rod insulator according to claim 1, characterized in that: The thickness of the thin umbrella-shaped skirt (2) is 1.2-2.5mm, and the maximum diameter is 90-140mm.

3. A thin umbrella-shaped railway rod insulator according to claim 1, characterized in that: The distance between two adjacent thin umbrella-shaped skirts (2) is 1 / 4 to 1 / 3 of the maximum diameter of the thin umbrella-shaped skirt (2).

4. A thin umbrella-shaped railway rod insulator according to claim 1, characterized in that: The core rod (1) has a diameter of 18-28 mm and a length of 700-1400 mm.

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