Cantilever structure of overhead line system of electrified railway

Abstract

A cantilever structure of an electrified railway contact network comprises a flat cantilever, a cantilever supporting pipe, a voltage equalizing cover, a base body, reinforced fibers and auxiliary materials, and a metal carrier cable seat serves as a main bearing structure and supports the whole cantilever system. According to the cantilever structure of the overhead line system of the electrified railway, advanced insulating materials such as glass fiber reinforced epoxy resin are adopted, the materials provide excellent insulating performance and high mechanical strength, reliable power supply of the overhead line system and long-term durability of the structure are ensured, meanwhile, the weight of the whole structure is reduced due to the light characteristic of the materials, and the overall structure is more compact. The installation difficulty and cost are reduced, the adaptability of the cantilever to the environment is optimized through the combination of the reinforced fibers and the base body, the performance of the cantilever under the extreme climate such as the high-humidity and salt mist environment is improved, and the maintenance requirement and potential faults caused by environmental factors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrified railways, in particular to an electrified railway contact network wrist arm structure. Background Art

[0002] In the existing electrified railway system, the contact network arm is a key component that supports the contact wire suspended above the track to ensure the smooth transmission of electricity from the power supply system to the running train. These arms are usually supported by steel columns or reinforced concrete columns and equipped with insulators to prevent current leakage and ensure the safe operation of the system.

[0003] Although existing systems are largely effective, they have several major problems in terms of maintenance and environmental adaptability, such as high maintenance requirements. Traditional wrist and insulator designs require regular inspection and maintenance, especially in harsh environmental conditions, such as heavily polluted and salt spray areas. Insulators are prone to flashover, which not only increases the maintenance workload but may also cause power outages. The complex structure of the current overhead contact network wrist structure combines metal wrists with insulators. Although this structure meets basic functional requirements, its complexity increases the difficulty and cost of installation and maintenance. The environmental adaptability is insufficient. Existing materials and designs fail to effectively cope with the challenges of harsh environments such as high humidity and high pollution, resulting in unstable insulation performance and susceptibility to environmental factors. Utility Model Content

[0004] The utility model aims to provide an electrified railway contact network arm structure to solve the problem of high maintenance cost of the existing electrified railway contact network proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrified railway contact network wrist arm structure, the electrified railway contact network wrist arm structure includes a flat wrist arm, a wrist arm support tube, a connecting sleeve, a bearing, an oblique wrist arm, a positioning tube support, a metal load-bearing cable seat, a positioning tube, a positioner base, a positioner, a fixing part, a metal connecting part, a metal component, a pressure equalizing cover, a matrix, reinforcing fibers and auxiliary materials, the left end of the flat wrist arm is provided with a wrist arm support tube, the flat wrist arm is provided with a connecting sleeve, a bearing is provided between the connecting sleeve and the wrist arm support tube, the other end of the wrist arm support tube is provided with an oblique wrist arm, and the flat wrist arm A positioning tube support is provided at the lower end, and a metal load-bearing cable seat is provided between the flat wrist arm and the oblique wrist arm. The flat wrist arm is used to support the contact line and transmit electricity to ensure the stability of power supply. The wrist arm support tube provides additional structural support to enhance the stability between the flat wrist arm and the oblique wrist arm. The connecting sleeve serves as an interface connecting the flat wrist arm and the wrist arm support tube. The bearing in the connecting sleeve allows dynamic adjustment to adapt to load changes. The oblique wrist arm assists the flat wrist arm in supporting the contact line and provides additional support and stability. The positioning tube support fixes the positioning tube to ensure the precise position adjustment of the wrist arm system. The metal load-bearing cable seat serves as the main load-bearing structure to support the entire wrist arm system.

[0006] Preferably, a positioning tube is provided at the other end of the positioning tube support, and a positioner base is provided at the lower side of the positioning tube. The positioning tube is an important component for adjusting the position of the wrist arm and transmits the accuracy of position adjustment. The positioner base provides a stable installation platform for the positioner.

[0007] Preferably, a locator is provided at the upper end of the locator base, and a fixing is provided between the locator base and the locator. The locator accurately controls the position of the arm to optimize the function of the contact network, and the fixing fixes the locator on the base to ensure the stability of the locator.

[0008] Preferably, a metal connector is provided on the positioning tube, the other end of the metal connector is connected to the positioner, and the metal connector connects the positioning tube to other arm components to provide mechanical strength of the structure.

[0009] Preferably, the positioning tube support and the positioning tube are connected by a metal component, and a pressure equalizing cover is provided on the positioning tube. The metal component connects the positioning tube support and the positioning tube to increase the strength and durability of the structure. The pressure equalizing cover optimizes the electric field distribution, prevents local discharge, and improves the electrical safety of the overall structure.

[0010] Preferably, the wrist-arm structure adopts insulating materials, which include a matrix, reinforcing fibers and auxiliary materials. The matrix material is epoxy resin, and the matrix provides necessary insulating properties to protect the wrist-arm structure from current leakage. The reinforcing fibers improve the mechanical strength and durability of the wrist, and the auxiliary materials improve the performance of the insulating materials.

[0011] The upper end of the substrate is provided with reinforcing fibers, the reinforcing fiber material is glass fiber, the upper end of the reinforcing fibers is provided with auxiliary materials, the auxiliary materials are a mixture of curing agent, accelerator, colorant, flame retardant and anti-UV agent, and are used to improve the processing performance, physical properties or chemical properties of the insulating material.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The design of the electrified railway overhead contact network arm structure adopts advanced insulating materials such as glass fiber reinforced epoxy resin. These materials have good insulation performance and high mechanical strength, ensuring the reliable power supply of the overhead contact network and the long-term durability of the structure. At the same time, the lightweight characteristics of these materials help to reduce the weight of the overall structure, reduce the difficulty and cost of installation, and the combination of reinforced fiber and matrix optimizes the adaptability of the arm to the environment, improves its performance in extreme climates such as high humidity and salt spray environments, and reduces maintenance requirements and potential failures caused by environmental factors;

[0014] 2. The utility model adopts new insulating materials, such as glass fiber reinforced epoxy resin composite materials, which not only have the characteristics of high strength, light weight and corrosion resistance, but also have excellent insulation performance, can effectively reduce the maintenance workload, structural optimization, by optimizing the design of the wrist arm, simplifying the structure, reducing the number of hanging parts, thereby simplifying the installation process and reducing the difficulty of maintenance; optimizing the structural design of the wrist arm to reduce the risk of insulation failure. Through these technical improvements, the performance and reliability of the electrified railway contact network wrist arm can be significantly improved, and the failures caused by environmental factors can be reduced, ensuring the safe and stable operation of the railway system;

[0015] 3. The arm structure of the electrified railway overhead contact network effectively reduces the risk of partial discharge by introducing a voltage-equalizing cover and carefully designed electric field distribution optimization measures. This design makes the electric field more uniform, reduces the occurrence of arc and discharge events, and ensures the stability and safety of the electrical system. The use of the voltage-equalizing cover has demonstrated its important role in maintaining the performance of insulation materials and extending their service life in actual applications, and has improved the reliability and maintenance efficiency of the entire overhead contact network system;

[0016] 4. The structural optimization of the electrified railway contact network arm structure also includes design improvements that simplify installation and maintenance. The new arm adopts modular and replaceable components, which makes on-site installation faster and maintenance easier. This not only reduces long-term operating costs, but also improves the maintainability and operability of the system, allowing emergency repairs and parts replacement to be completed quickly and effectively, thereby minimizing potential operational interruptions and improving the efficiency and responsiveness of the entire railway network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the top view of the positive positioning of the contact network arm structure of the utility model;

[0018] Figure 2 This is the top view of the reverse positioning of the contact network arm structure of the utility model;

[0019] Figure 3 This is a partial view of the optimized positive positioning structure of the utility model;

[0020] Figure 4 This is a partial view of the optimized anti-positioning structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the insulating material structure of the utility model.

[0022] In the figure: 1. Flat wrist arm; 2. Wrist arm support tube; 3. Connecting sleeve; 4. Bearing; 5. Oblique wrist arm; 6. Positioning tube support; 7. Metal load-bearing cable seat; 8. Positioning tube; 9. Positioner base; 10. Positioner; 11. Fixing piece; 12. Metal connecting piece; 13. Metal component; 14. Pressure equalizing cover; 15. Matrix; 16. Reinforcement fiber; 17. Auxiliary materials. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5The utility model provides a technical solution: an electrified railway contact network arm structure, the electrified railway contact network arm structure comprises a flat arm 1, an arm support tube 2, a connecting sleeve 3, a bearing 4, an oblique arm 5, a positioning tube support 6, a metal load-bearing cable seat 7, a positioning tube 8, a positioner base 9, a positioner 10, a fixing part 11, a metal connecting part 12, a metal component 13, a pressure equalizing cover 14, a matrix 15, a reinforcing fiber 16 and an auxiliary material 17, the left end of the flat arm 1 is provided with an arm support tube 2, the flat arm 1 is provided with a connecting sleeve 3, a bearing 4 is provided between the connecting sleeve 3 and the arm support tube 2, and the other end of the arm support tube 2 is provided with an oblique arm 5 A positioning tube support 6 is provided at the lower end of the flat arm 1, and a metal load-bearing cable seat 7 is provided between the flat arm 1 and the oblique arm 5. The flat arm 1 is used to directly support and transmit electricity to the train. The arm support tube 2 enhances the structural stability between the flat arm 1 and the oblique arm 5. The connecting sleeve 3 is used to connect the flat arm 1 and the arm support tube 2, and allows partial rotation through the bearing 4 to adapt to dynamic loads. The oblique arm 5 also supports power transmission and increases the three-dimensional stability of the entire structure. The positioning tube support 6 is used to fix the positioning tube 8 to ensure its accurate position to maintain the alignment of the overall structure. The metal load-bearing cable seat 7 serves as an important structural connection point, bearing the strength and weight of the entire arm system.

[0025] A positioning tube 8 is provided at the other end of the positioning tube support 6, a positioner base 9 is provided at the lower side of the positioning tube 8, a positioner 10 is provided at the upper end of the positioner base 9, a fixing part 11 is provided between the positioner base 9 and the positioner 10, a metal connector 12 is provided on the positioning tube 8, and the other end of the metal connector 12 is connected to the positioner 10. The positioning tube 8 is a key component for adjusting the position of the wrist arm, the positioner base 9 provides a stable installation platform for the positioner 10, and the positioner 10 is responsible for fine-tuning the position of the entire wrist arm system to optimize the function of the contact network. The fixing part 11 is used to fix the positioner 10 to the positioner base 9 to ensure its stability. The metal connector 12 connects the positioning tube 8 and other wrist arm components to ensure the mechanical strength of the structure. The high-voltage end contact line is set to 41.012 kV, and the maximum field strength on the outer surface is preset to 18 kV / cm. The designed insulating material wrist arm electric field distribution cloud map shows that the maximum field strength on the outer surface is 22.1 kV / cm. Through structural optimization, the electric field strength is improved to achieve higher safety standards.

[0026] The positioning tube support 6 and the positioning tube 8 are connected by a metal component 13, and a voltage-equalizing cover 14 is arranged on the positioning tube 8. The arm structure is made of insulating materials, and the insulating materials include a matrix 15, a reinforcing fiber 16 and an auxiliary material 17. The matrix 15 is made of epoxy resin, and the upper end of the matrix 15 is provided with a reinforcing fiber 16, and the reinforcing fiber 16 is made of glass fiber. The upper end of the reinforcing fiber 16 is provided with an auxiliary material 17. The metal component 13 is used to connect and strengthen the structure between the positioning tube support 6 and the positioning tube 8, and the voltage-equalizing cover 14 is used to improve the electric field distribution and prevent local discharge, thereby increasing The electrical safety of the overall structure is strengthened. The matrix 15 of the insulating material, such as epoxy resin, provides the necessary electrical insulation properties. The reinforcing fiber 16, such as glass fiber, improves the mechanical strength and durability of the material. The auxiliary material 17 further improves the performance of the insulating material. The auxiliary material 17 includes a curing agent, an accelerator, a colorant, a flame retardant and an anti-UV agent, which are used to improve the processing performance, physical properties or chemical properties of the insulating material, such as improving UV resistance, flame retardancy or reducing water absorption. The insulating material has excellent insulation properties. Tests show that it has a higher volume resistivity of 2×10^11 Ω·m and a lower dielectric loss factor of ≤0.01, which ensures electrical safety and stability. The mechanical property test of the reinforcing fiber shows that the tensile strength is 986.67 MPa and the bending strength is 1078.33 MPa, showing excellent structural strength. The addition of auxiliary materials enhances the comprehensive performance of the base material, making the entire wrist arm structure more suitable for long-term operation in harsh environments.

[0027] Working principle: Flat arm 1 is the main support, transmitting power to the train, and connected to the arm support tube 2 to improve the structural stability. The connecting sleeve 3 provides a connection point between the arm 1 and the support tube 2 and is equipped with a bearing 4, allowing dynamic adjustment to adapt to different loads. The inclined arm 5 increases the three-dimensional stability and transmits power together with the flat arm 1. The positioning tube support 6 fixes the positioning tube 8 in the correct position to ensure structural alignment. The metal load-bearing cable seat 7 is used as a bearing point to connect the main arm components to ensure the overall structural load-bearing. The positioner base 9 and the positioner 10 work together to accurately adjust the position of the arm. The fixing 11 firmly fixes the positioner 10 on the base 9. The metal connector 12 and The metal component 13 provides additional mechanical connection and structural strength for the positioning tube 8. The voltage-equalizing cover 14 optimizes the electric field distribution, prevents electrical failures, and improves safety. The insulating material composed of the matrix 15, the reinforcing fiber 16, and the auxiliary material 17 ensures the electrical insulation performance of the arm, prevents current leakage, enhances the mechanical strength and durability of the overall arm structure, and ensures the stable operation and electrical safety of the contact network system. The simulation study of the electric field distribution of the arm shows that the risk of insulation failure can be reduced by optimizing the arm structure. The insulating material includes glass fiber reinforced epoxy resin, which can increase the insulation creepage distance and insulation clearance distance. The specific test shows that the density of the insulating material is 2.114 g / cm3, water absorption rate is 0.025%, volume resistivity is 2×10^11 Ω·m, dielectric loss factor is less than 0.01, leakage current is less than 15μA, tensile strength is 986.67 MPa, bending strength is 1078.33 MPa, compressive strength is 591 MPa, the high-voltage end contact line is set to 41.012 kV, the maximum field strength on the outer surface is preset to 18 kV / cm, and the electric field distribution cloud map of the designed insulating material arm shows that the maximum field strength on the outer surface is 22.1 kV / cm. Through structural optimization, the electric field strength is improved to achieve higher safety standards.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An electrified railway overhead contact network arm structure, the electrified railway overhead contact network arm structure comprising a flat arm (1), an arm support tube (2) and a connecting sleeve (3), characterized in that: The left end of the flat arm (1) is provided with an arm support tube (2), the flat arm (1) is provided with a connecting sleeve (3), a bearing (4) is provided between the connecting sleeve (3) and the arm support tube (2), the other end of the arm support tube (2) is provided with an oblique arm (5), the lower end of the flat arm (1) is provided with a positioning tube support (6), and a metal load-bearing cable seat (7) is provided between the flat arm (1) and the oblique arm (5).

2. The electrified railway overhead contact network arm structure according to claim 1, characterized in that: A positioning tube (8) is provided at the other end of the positioning tube support (6), and a positioner base (9) is provided at the lower side of the positioning tube (8).

3. The electrified railway overhead contact network arm structure according to claim 2, characterized in that: A positioner (10) is provided at the upper end of the positioner base (9), and a fixing member (11) is provided between the positioner base (9) and the positioner (10).

4. The electrified railway overhead contact network arm structure according to claim 2, characterized in that: The positioning tube (8) is provided with a metal connecting piece (12), and the other end of the metal connecting piece (12) is connected to the positioner (10).

5. The electrified railway overhead contact network arm structure according to claim 1, characterized in that: The positioning tube support (6) and the positioning tube (8) are connected via a metal component (13), and a pressure equalizing cover (14) is provided on the positioning tube (8).

6. The electrified railway overhead contact network arm structure according to claim 1, characterized in that: The arm structure is made of insulating material, the insulating material comprising a matrix (15), reinforcing fibers (16) and an auxiliary material (17); the matrix (15) is made of epoxy resin; the upper end of the matrix (15) is provided with reinforcing fibers (16); the reinforcing fibers (16) are made of glass fibers; the upper end of the reinforcing fibers (16) is provided with an auxiliary material (17); the auxiliary material (17) is a mixed material of a curing agent, an accelerator, a colorant, a flame retardant and an anti-UV agent.

Images