Anti-hunting device for contact network switch lead wire electric connection

Abstract

The utility model relates to a kind of anti-hunting devices for contact network switch lead wire electric connection, including post insulator, ball-hinge type anti-hunting device, switch lead wire connecting clamp;The ball-hinge type anti-hunting device includes ball bowl connecting piece, spherical adapter, sleeve, spring, sleeve connecting rod;The ball bowl connecting piece is fixedly connected with the top of post insulator;The lower part of the spherical adapter is wrapped by ball bowl connecting piece;The upper part of the spherical adapter is fixedly connected with the sleeve, one end of sleeve connecting rod is fixedly connected with switch lead wire connecting clamp, the other end is located in the sleeve, the spring is set on sleeve connecting rod in the sleeve, and step structure is formed on the bottom of sleeve connecting rod, the spring is limited, so that the spring is compressed / stretched deformation when moving up and down in the sleeve with sleeve connecting rod;The utility model improves the anti-hunting and anti-hunting fatigue performance of contact network switch lead wire from many aspects.

Description

Technical Field

[0001] This utility model belongs to the field of electrified railway catenary technology, specifically relating to an anti-galloping device for the electrical connection of catenary switch leads. Background Technology

[0002] As a core component of the electrified railway traction power supply system, the stability of the overhead contact line directly affects the reliability and safety of train operation. Within the contact line system, the electrical connection of the switch leads is a crucial node connecting the disconnecting switch and the contact suspension, undertaking the dual functions of current transmission and mechanical support. However, affected by complex weather conditions (such as strong winds and icing), the switch leads are prone to low-frequency, large-amplitude galloping, leading to conductor fatigue damage, loosening of electrical connections, and even arcing. In severe cases, this can cause contact line tripping or wire breakage accidents, threatening railway operational safety.

[0003] Currently, anti-galloping measures for overhead contact line conductors mainly include configuring dampers or using aerodynamic anti-galloping devices. However, traditional solutions have significant limitations in switch lead electrical connection scenarios: First, existing dampers are mostly designed for long-span conductors and are difficult to adapt to the vibration characteristics of short-span conductors, resulting in limited vibration suppression effects; second, some anti-galloping devices rely on complex mechanical structures, leading to high installation and maintenance costs, and the possibility of component loosening due to long-term vibration, affecting reliability. Furthermore, existing technologies lack targeted optimization for the dynamic stress concentration problem at electrical connection points, making it difficult to balance electrical performance with mechanical anti-galloping requirements.

[0004] Therefore, there is an urgent need for an anti-galling device specifically designed for electrical connection scenarios of switch leads, which can effectively suppress galling in a limited space through structural innovation, while ensuring the stability and safety of the electrical connection. Summary of the Invention

[0005] The technical problem solved by this utility model is achieved through the following technical solution:

[0006] An anti-galloping device for electrical connection of contact network switch leads includes a post-type insulator, a ball-joint type anti-galloping device, and a switch lead connection clamp;

[0007] The ball-joint anti-fighting device includes a ball-cup connector, a ball-shaped adapter, a sleeve, a spring, and a sleeve connecting rod;

[0008] The ball cup connector is fixedly connected to the top of the column insulator; the lower part of the spherical adapter is wrapped by the ball cup connector; the upper part of the spherical adapter is fixedly connected to the sleeve; one end of the sleeve connecting rod is fixedly connected to the switch lead connecting clamp, and the other end is located inside the sleeve; the spring is sleeved on the sleeve connecting rod located inside the sleeve, and a stepped structure is formed at the bottom of the sleeve connecting rod to limit the spring, so that the spring is compressed / stretched as it moves up and down with the sleeve connecting rod inside the sleeve.

[0009] Furthermore, it also includes a crossarm, one end of which is fixedly installed on an H-shaped support by a fixed angle steel; the other end of which is connected and fixed to the bottom of a column insulator.

[0010] Furthermore, rubber damping plates are fixedly installed at the upper and lower parts of the sleeve, which allows the energy of the sleeve connecting rod to be further absorbed and dissipated when it moves up and down.

[0011] Furthermore, the spring is a columnar helical spring, and its axis is aligned with the axis of the columnar insulator in the vertical state.

[0012] Furthermore, the switch lead connector is a copper alloy connector with a sleeve connecting rod mounting groove at the bottom.

[0013] Furthermore, an adjusting shim set is provided at the connection between the fixed angle steel and the crossbeam and H-shaped support, and the adjusting shim set includes metal shims of at least three thicknesses.

[0014] The advantages and positive effects of this utility model are:

[0015] This invention addresses the low-frequency galloping characteristics of overhead contact line switch leads under wind conditions by incorporating a ball-joint type nonlinear spring-mass damping system. Through multi-degree-of-freedom deflection and adaptive adjustment of spring damping, it suppresses vibration amplitude, preventing fatigue caused by stress concentration in the switch leads due to icing, galloping, and abrasion from light winds. By suppressing galloping and optimizing stress, it reduces the risk of unplanned power outages caused by galloping. It can be seamlessly integrated into existing overhead contact line upgrades or new lines, adapting to various scenarios such as high-speed railways and heavy-haul railways, demonstrating significant potential for widespread adoption and providing crucial technical support for the safe operation of electrified railways. Attached Figure Description

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of this utility model. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0017] Figure 1 A schematic diagram of the installation structure of the anti-galling device for electrical connection of contact wire switch leads provided in this embodiment of the utility model;

[0018] Figure 2 A cross-sectional schematic diagram of a ball-joint type anti-galloping device for an anti-galloping device for electrical connection of contact wire switch leads provided in an embodiment of this utility model;

[0019] Figure 3A schematic diagram of the spherical adapter structure of the ball-joint anti-fighting device provided in this embodiment of the utility model;

[0020] Figure 4 A schematic diagram of the switch lead connection clamp structure provided in this embodiment of the utility model;

[0021] Figure 5 A schematic diagram showing the connection between the crossbeam and the H-shaped support column provided in an embodiment of this utility model. Detailed Implementation

[0022] First, it should be noted that the specific structure, features, and advantages of this utility model will be described in detail below by way of examples. However, all descriptions are for illustrative purposes only and should not be construed as limiting the utility model in any way. Furthermore, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, can still be arbitrarily combined or deleted among these technical features (or their equivalents) to obtain more other embodiments of this utility model that may not be directly mentioned herein. Additionally, for the sake of simplifying the drawings, the same or similar technical features may be indicated only in one place in the same drawing.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0025] This embodiment provides an anti-galloping device for electrical connection of contact network switch leads, including a crossarm, a fixed angle steel, a post-type insulator, a ball-joint type anti-galloping device, and a switch lead connection clamp;

[0026] like Figure 1 As shown, one end of the crossbeam 1 is fixedly installed on the upper part of the H-shaped support by a fixing angle steel 2, forming the load-bearing foundation of the device; the fixing angle steel 2 and the reserved hole of the H-shaped support are connected and fixed by fastening bolts to achieve the first stage of fixation; the fixing angle steel 2 and the crossbeam 1 are connected and fixed by fastening bolts; it should be noted that, as Figure 5As shown, adjusting shim sets 21 are provided at the connection points of the fixed angle steel 2 and the crossarm 1. The adjusting shim set 21 contains at least three metal shims of different thicknesses to compensate for the tolerance of the support mounting surface and ensure the horizontality of the crossarm. The other end of the crossarm 1 is connected and fixed to the bottom of the column insulator 3. The upper part of the column insulator 3 is connected and fixed to the lower part of the ball joint anti-galling device 4. The upper part of the ball joint anti-galling device 4 is connected to the switch lead connection clamp 5 by fastening bolts.

[0027] like Figure 2 , 3 As shown, the ball joint anti-fighting device 4 includes a ball cup connector 41, a ball adapter 42, a sleeve 44, a spring 45, and a sleeve connecting rod 46;

[0028] The ball cup connector 41 is fixedly connected to the top of the post insulator 3; the lower part of the spherical adapter 42 is wrapped by the ball cup connector 41; the upper part of the spherical adapter 42 is fixedly connected to the sleeve 44 by threads; one end of the sleeve connecting rod 46 is fixedly connected to the switch lead connecting clamp 5 by fastening bolts, and the other end is located inside the sleeve 44. The spring 45 is sleeved on the sleeve connecting rod 46 located inside the sleeve, and the bottom of the sleeve connecting rod 46 forms a stepped structure to limit the spring, so that the spring is compressed / stretched when it moves up and down with the sleeve connecting rod 46 inside the sleeve 44, which can absorb the longitudinal vibration energy of the switch lead and achieve the effect of suppressing galloping;

[0029] Of course, in order to further dissipate vibration energy and improve the overall anti-galling performance of the anti-galling device, it is possible to consider fixing rubber damping plates 43 at the upper and lower parts of the sleeve 44. The setting of rubber damping plates can further absorb and dissipate energy when the sleeve connecting rod 46 moves up and down.

[0030] It should be noted that the spring 45 is a columnar helical spring, and its axis is consistent with the axis of the column insulator 3 in the vertical state; the spherical adapter 42 is located inside the ball cup connector 41 and has a spherical structure. This spherical structure can rotate freely inside the ball cup connector 41. The ball hinge structure formed by the spring 45, the ball cup connector 41 and the spherical adapter 42 can ensure that the switch lead connection clamp is always electrically connected to the switch lead and forms axial elastic support in the direction of force vibration.

[0031] like Figure 4 As shown, the switch lead connecting clamp 5 is a copper alloy clamp with a two-part structure. When closed, its upper part forms a sleeve structure that cooperates with the switch lead, and its lower part is provided with a sleeve connecting rod mounting groove 51. The sleeve connecting rod of the ball joint anti-flying device 4 is connected to the switch lead connecting clamp 5 through the sleeve connecting rod mounting groove and the fastening bolt.

[0032] The ball-joint anti-fighting device 4 has a ball-cup connector 41 at its lower end that is connected to the column insulator 3 via a mounting flange 411. The lower end of the ball-cup connector 41 is bolted to the top of the column insulator 3 via the mounting flange 411, thereby improving assembly interchangeability.

[0033] The specific installation process of the anti-galloping device in this embodiment is as follows: First, the crossarm is connected and fixed to the fixed angle steel by fastening bolts, and then connected and fixed to the column insulator by fastening bolts; then, the ball joint anti-galloping device is installed on the top of the column insulator, the whole device is installed on the H-shaped support, and the contact wire switch lead wire is electrically connected to the ball joint anti-galloping device by the switch lead wire connection clamp.

[0034] The anti-galling device in this embodiment improves the anti-galling and anti-galling fatigue performance of the contact wire switch leads in many ways. It has the advantages of convenient installation, wear prevention and vibration reduction, increased support position, avoidance of stress concentration, and reduction of galling amplitude. It can effectively solve the problem of large vibration and fatigue wear of the contact wire switch leads during icing and galling.

[0035] The above embodiments have provided a detailed description of the present invention, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An anti-galloping device for electrical connection of contact network switch leads, characterized in that: Includes post-type insulators (3), ball-joint anti-galling devices (4), and switch lead connection clamps (5); The ball joint anti-fighting device (4) includes a ball cup connector (41), a ball adapter (42), a sleeve (44), a spring (45), and a sleeve connecting rod (46); The ball cup connector (41) is fixedly connected to the top of the post insulator (3); the lower part of the ball adapter (42) is wrapped by the ball cup connector (41); the upper part of the ball adapter (42) is fixedly connected to the sleeve (44); one end of the sleeve connecting rod (46) is fixedly connected to the switch lead connecting clamp (5), and the other end is located inside the sleeve (44). The spring (45) is sleeved on the sleeve connecting rod (46) located inside the sleeve, and a stepped structure is formed at the bottom of the sleeve connecting rod (46) to limit the spring, so that the spring is compressed / stretched when it moves up and down with the sleeve connecting rod (46) inside the sleeve (44).

2. The anti-galloping device for electrical connection of contact network switch leads according to claim 1, characterized in that: It also includes a crossarm (1), one end of which is fixedly installed on an H-shaped support by a fixed angle steel (2); the other end of which is connected and fixed to the bottom of a column insulator (3).

3. The anti-galloping device for electrical connection of contact network switch leads according to claim 1, characterized in that: Rubber damping plates (43) are fixedly installed at the upper and lower parts of the sleeve (44), and the rubber damping plates further absorb and dissipate energy when the sleeve connecting rod (46) moves up and down.

4. The anti-galloping device for electrical connection of contact network switch leads according to claim 1, characterized in that: The spring (45) is a columnar helical spring, and its axis is aligned with the axis of the columnar insulator (3) in the vertical state.

5. The anti-galloping device for electrical connection of contact network switch leads according to claim 1, characterized in that, The switch lead connecting clamp (5) is a copper alloy clamp with a sleeve connecting rod mounting groove (51) at the bottom.

6. The anti-galloping device for electrical connection of contact network switch leads according to claim 2, characterized in that, The fixed angle steel (2) is provided with an adjusting shim group (21) at the connection between it and the crossbeam (1) and the H-shaped support column. The adjusting shim group (21) contains at least three metal shims of different thicknesses.

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