Self-cleaning anti-icing coating structure for electrified railway contact net

Abstract

The utility model provides a self-cleaning anti-icing coating structure for an electrified railway contact network, which belongs to the technical field of railway contact networks, and comprises a bottom coating and a surface coating which are coated on the railway contact network, the bottom coating is directly coated on the surface of a contact network lead, and the surface coating is coated on the surface of the bottom coating. According to the utility model, on the premise of keeping extremely high conductivity, the ice coating amount of the overhead line system under extremely cold conditions can be effectively reduced, and the icing force of an ice layer on the surface of the overhead line system can be greatly reduced, so that the problems of ice coating prevention and easy ice shedding of the overhead line system can be effectively solved on the premise of not influencing the normal operation of a train, and the service life of the overhead line system is prolonged. And moreover, the investment of manpower and material resources is reduced, high-altitude operation is avoided, and safety is provided.

Description

Technical Field

[0001] This utility model belongs to the field of railway catenary technology, specifically relating to a self-cleaning anti-icing coating structure for electrified railway catenary. Background Technology

[0002] The overhead contact line is the only special transmission line in the electric traction power supply system that supplies power to electric locomotives. It is erected above the track via supports and cantilever arms. The contact line is constantly exposed to various natural environments and is highly susceptible to external factors such as climate and terrain. In recent years, due to changes in the natural environment, icing of the contact line has become frequent. After icing, the pantograph's current-collecting performance decreases, reducing the safety and reliability of the contact line. It causes severe mechanical wear and arcing erosion on the contact wire, frequently resulting in electric arcs that prevent trains from drawing current normally. It can also cause contact line galloping and insulator flashover, leading to short circuits and even pantograph-contact line accidents. This can result in partial or large-scale shutdowns of railway operations, further exacerbating the disaster and seriously affecting railway safety.

[0003] Current contact network anti-icing and de-icing devices mainly use heaters, snow scrapers, and other equipment to heat or scrape away the ice accumulated on the contact network. For example, Chinese patent literature, publication number CN115693570A, publication date February 3, 2023, entitled "Anti-icing and De-icing Device, Spacer, Insulator and System," provides an anti-icing and de-icing device for fixed installation between two components at different potentials in an overhead line or electric railway contact network. This device includes a cylindrical cam mechanism and insulating components connected in series. The cylindrical cam mechanism includes a base, a motor, a reduction mechanism, a cylindrical cam, a contact member, and a telescopic part. The contact surface between the cylindrical cam and the contact member is provided with a stepped section. When the contact member crosses the stepped section of the contact surface of the cylindrical cam, the displacement of the telescopic part changes abruptly due to the telescopic motion. This causes a sudden change in the tension and / or gravitational potential energy between two components with different potentials in the overhead line tower system or the electric railway contact network tower system. The sudden change in potential energy causes the overhead line or electric railway contact network to vibrate and shake off the ice, thus achieving the purpose of anti-icing and de-icing.

[0004] However, there are some problems in practical applications. For example, the de-icing effect of the device may be affected in severe weather. The maintenance and upkeep of the de-icing equipment also require a lot of manpower and resources. The de-icing device needs to operate at heights, so there are certain safety risks. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a self-cleaning anti-icing coating structure for electrified railway contact networks. This structure effectively reduces the amount of ice forming on the contact network under extremely cold conditions while maintaining extremely high conductivity, significantly reducing the icing force on the contact network surface. This effectively solves the problems of anti-icing and easy de-icing of the contact network without affecting normal train operation. Furthermore, it reduces the investment of manpower and resources for equipment maintenance and avoids high-altitude operations, thus providing safety.

[0006] This utility model is achieved through the following technical solution:

[0007] A self-cleaning anti-icing coating structure for electrified railway contact networks is characterized in that: the self-cleaning anti-icing coating structure includes a base coating and a top coating coated on the railway contact network, wherein the base coating is directly coated on the surface of the contact network conductor, and the top coating is coated on the surface of the base coating.

[0008] Furthermore, the thickness of the base coating is not less than 120µm, and the surface of the base coating has a roughness of 10-30µm.

[0009] Furthermore, the thickness of the surface coating is 10-30µm.

[0010] Furthermore, the total thickness of the self-cleaning anti-icing coating structure is not less than 130µm.

[0011] Furthermore, the conductivity of the self-cleaning anti-icing coating structure is not less than 5000 uS / m.

[0012] Furthermore, the abrasion resistance (1000g / 1000 rpm) of the self-cleaning anti-icing coating structure is no more than 50mg.

[0013] Furthermore, the icing force (horizontal tensile force of ice layer) of the self-cleaning anti-icing coating structure is no greater than 20N.

[0014] Furthermore, the water contact angle of the self-cleaning anti-icing coating structure is not less than 150°, and the water roll-off angle is not more than 10°.

[0015] Furthermore, the flame retardancy rating of the self-cleaning anti-icing coating structure is not lower than B1.

[0016] Furthermore, the base coating is one of epoxy resin coating, polyurethane coating, polysiloxane coating, and fluorosilicone modified resin coating; the top coating is one of epoxy resin coating, polyurethane coating, polysiloxane coating, and fluorosilicone modified resin coating.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. By applying a base coat to the contact wire surface, the adhesion between the coating and the contact wire surface can be effectively improved. At the same time, it can also provide excellent wear resistance and conductivity, ensuring the durability of the coating structure without affecting the effective operation of the train. Applying a top coat on the base coat surface can effectively improve the hydrophobic and self-cleaning properties of the coating. It can effectively prevent the formation of ice layers on the coating in rain, snow, and cold environments, which would reduce the conductivity of the contact wire, generate electric arcs, and prevent the train from drawing current normally. It also reduces the input of manpower and materials and avoids high-altitude operations, thus providing safety.

[0019] 2. By setting the thickness of the base coating to be above 120µm and the surface roughness to be 10-30µm, and setting the thickness of the top coating to be between 10-30µm, this structural design allows the top coating to effectively fill the gaps between the roughness of the base coating. This ensures that the conductive arm can directly contact the base coating over a large area during train operation, thus fully utilizing the excellent conductivity and wear resistance of the base coating.

[0020] 3. By limiting the thickness of the self-cleaning topcoat to between 10µm and 30µm, the economic efficiency can be improved while ensuring the effective anti-icing performance of the coating structure.

[0021] 4. The self-cleaning anti-icing coating structure of the contact wire of this utility model has a simple structure, is conductive, wear-resistant, and has a guaranteed anti-icing effect. It can greatly reduce the amount and bonding force of ice forming on the surface of the contact wire under extremely cold conditions, ensuring the effective operation of trains in winter and high-altitude and cold regions, and also has a high cost performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Reference numerals: 1-primer coating, 2-top coat, 3-primer coating surface, 4-contact wire. Detailed Implementation

[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] like Figure 1As shown, a self-cleaning anti-icing coating structure for an electrified railway contact network is disclosed. The self-cleaning anti-icing coating structure includes a base coating 1 and a top coating 2 coated on the railway contact network. The base coating 1 is directly coated on the surface of the contact network conductor 4, and the top coating 2 is coated on the surface of the base coating 3.

[0027] In implementation, the base coating 1 is directly applied to the surface of the contact wire 4 after simple grinding, which can effectively improve the adhesion between the coating and the contact wire surface, and at the same time provide excellent wear resistance and conductivity, ensuring the durability of the coating structure without affecting the effective operation of the train. The top coating 2 is applied to the surface of the base coating 3, which can effectively improve the hydrophobic self-cleaning performance of the coating, and can effectively prevent the formation of ice layer on the coating in rain, snow and cold environments, which would reduce the conductivity of the contact wire and generate electric arcs that would prevent the train from operating normally.

[0028] This embodiment forms a self-cleaning anti-icing coating structure by coating the surface of the contact wire 4 with a base coating 1 and a top coating 2. The conductivity, abrasion resistance, icing force, flame retardancy rating, water contact angle, water roll-off angle, and coating thickness of this coating structure meet the set requirements. It solves the problems of anti-icing and easy dehydration better than setting a single coating structure. Setting a two-layer coating structure can effectively reduce the amount of ice formed on the contact wire under extremely cold conditions while maintaining extremely high conductivity, and greatly reduce the icing force of the ice layer on the contact wire surface. Thus, it can effectively solve the problems of anti-icing and easy de-icing of the contact wire without affecting the normal operation of the train, and reduce the input of manpower and material resources and avoid high-altitude operations, thus providing safety. The materials used for the base coating 1 and the top coating 2 can be coating materials that are well known or publicly known to those skilled in the art and can meet the requirements of conductivity, abrasion resistance, icing force, flame retardancy rating, water contact angle, water roll-off angle, and coating thickness, and can all be used as materials for this coating structure.

[0029] Example 2

[0030] This embodiment further elaborates and supplements the implementation of this utility model based on Embodiment 1.

[0031] As one embodiment of this example, the thickness of the base coating 1 is not less than 120µm. This thickness design allows the coating to withstand long-term friction of the contact network during train operation without being worn through and exposing the base layer. The surface 3 of the base coating has a roughness of 10-30µm, which allows the top coating 2 to effectively adhere to the surface 3 of the base coating. At the same time, the top coating 2 effectively fills the gaps formed by the roughness of the base layer, which can effectively exert the wear resistance and conductivity of the base coating 1, and also effectively exert the hydrophobic and anti-icing properties of the top coating 2.

[0032] As another embodiment of this example, the topcoat 2 has a thickness of 10-30µm. The resulting thickness can effectively fill the gaps in the roughness of the base coating 1, ensuring the overall performance of the coating in terms of conductivity, wear resistance, and anti-icing. This achieves the goal of preventing icing of the railway contact network and enabling trains to operate normally in winter and cold regions.

[0033] In another embodiment of this invention, the total thickness of the self-cleaning anti-icing coating structure is not less than 130µm.

[0034] Example 3

[0035] This embodiment further elaborates and supplements the implementation of the utility model based on Embodiment 1 or Embodiment 2.

[0036] As one embodiment of this invention, the conductivity of the self-cleaning anti-icing coating structure is not less than 5000 uS / m, providing excellent conductivity for the contact network.

[0037] As one embodiment of this example, the wear resistance (1000g / 1000 rpm) of the self-cleaning anti-icing coating structure is no more than 50mg, ensuring that the coating has good wear resistance and extending the service life of the coating.

[0038] As one embodiment of this invention, the icing force (horizontal tensile force of ice layer) of the self-cleaning anti-icing coating structure is no greater than 20N. This limits the maximum force the coating can withstand under the horizontal tensile force of ice layer, ensuring the stability and safety of the coating in low-temperature or icy environments.

[0039] As one embodiment of this invention, the water contact angle of the self-cleaning anti-icing coating structure is not less than 150° and the water roll-off angle is not more than 10°, which effectively improves the hydrophobic self-cleaning performance of the coating and can effectively prevent the formation of ice layers in rain, snow and cold environments, which would reduce the conductivity of the contact network and generate electric arcs, making it impossible for the train to operate normally.

[0040] As one embodiment of this example, the self-cleaning anti-icing coating structure has a flame retardancy rating of not less than B1, ensuring that the coating has good flame retardancy and that the coating can withstand the long-term friction of the contact wire during train operation without generating sparks.

[0041] In another embodiment of this invention, the base coating 1 is one of epoxy resin coating, polyurethane coating, polysiloxane coating, and fluorosilicone modified resin coating; the top coating 2 is one of epoxy resin coating, polyurethane coating, polysiloxane coating, and fluorosilicone modified resin coating.

Claims

1. A self-cleaning anti-icing coating structure for electrified railway contact networks, characterized in that: The self-cleaning anti-icing coating structure includes a base coating (1) and a top coating (2) coated on the railway contact wire. The base coating (1) is directly coated on the surface of the contact wire (4), and the top coating (2) is coated on the surface of the base coating (3). The thickness of the base coating (1) is not less than 120µm, and the surface (3) of the base coating has a roughness of 10-30µm; The thickness of the surface coating (2) is 10-30µm; The base coating (1) is one of epoxy resin coating, polyurethane coating, polysiloxane coating, and fluorosilicone modified resin coating; the top coating (2) is one of epoxy resin coating, polyurethane coating, polysiloxane coating, and fluorosilicone modified resin coating.

2. The self-cleaning anti-icing coating structure for electrified railway contact networks as described in claim 1, characterized in that: The total thickness of the self-cleaning anti-icing coating structure is not less than 130µm.

3. The self-cleaning anti-icing coating structure for electrified railway contact networks as described in claim 2, characterized in that: The conductivity of the self-cleaning anti-icing coating structure is not less than 5000 uS / m.

4. The self-cleaning anti-icing coating structure for electrified railway contact networks as described in claim 3, characterized in that: The wear resistance of the self-cleaning anti-icing coating structure is no more than 50mg.

5. The self-cleaning anti-icing coating structure for electrified railway contact networks as described in claim 4, characterized in that: The icing force of the self-cleaning anti-icing coating structure is no greater than 20N.

6. The self-cleaning anti-icing coating structure for electrified railway contact networks as described in claim 5, characterized in that: The water contact angle of the self-cleaning anti-icing coating structure is not less than 150°, and the water roll-off angle is not more than 10°.

7. The self-cleaning anti-icing coating structure for electrified railway contact networks as described in claim 6, characterized in that: The flame retardancy rating of the self-cleaning anti-icing coating structure is not lower than B1.

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