Lightning protection equipment for railway overhead line system
By installing protective components on the top of the surge arrester, the problem of easily damaged railway contact network cable interfaces was solved, achieving a stable connection and extending equipment life, thereby improving the safety and reliability of the railway system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN POWER SUPPLY SECTION OF CHINA RAILWAY JINAN BUREAU GRP CO LTD
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-05
AI Technical Summary
The lack of protection for railway overhead contact lines in severe weather makes cable joints susceptible to damage, affecting equipment lifespan and operational safety.
A protective assembly is installed at the top of the surge arrester, including a fixed cylinder, a sliding cylinder, a mounting sleeve, and a rubber ring. Through threaded engagement and ramp fit, it ensures a secure connection between the cable and the surge arrester, preventing loosening and wear.
This improved the stability of the connection between the cable and the surge arrester, extended the equipment lifespan, reduced maintenance frequency and operating costs, and ensured the safety and reliability of the railway system.
Smart Images
Figure CN224204463U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of railway technology, specifically to a lightning protection device for railway overhead contact lines. Background Technology
[0002] In the daily operation of the railway system, the overhead contact line, as an important component of the power supply system, bears the task of providing stable power to trains. However, under severe weather conditions, the overhead contact line and its related equipment face enormous challenges. Traditional railway overhead contact lines generally suffer from insufficient protective measures, especially at the interfaces. Due to their exposed structural characteristics, these interfaces provide opportunities for lightning strikes, resulting in frequent cable damage and affecting the normal operation of the railway system.
[0003] However, in the context of lightning protection for railway catenary systems, existing equipment often lacks protective devices at its interfaces. This makes it easy for the leads at the cable interfaces to break or loosen due to external pulling or impacts, causing the surge arrester to lose its electrical connection and malfunction. This damage not only reduces the equipment's lifespan but also increases maintenance costs and repair difficulty, ultimately leading to the arrester's failure to effectively prevent lightning damage to the railway catenary. This poses a serious threat to railway operational safety and affects the safety and reliability of the entire system. Utility Model Content
[0004] The purpose of this utility model is to provide a lightning protection device for railway catenary to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a lightning protection device for railway contact network, comprising a support column and a fixed frame installed on the outer wall of the support column, a lightning arrester installed at the top of the fixed frame, and a protective component installed at the top of the lightning arrester, the protective component being used to protect the interface between the cable and the lightning arrester;
[0006] The protective component includes a fixed cylinder, which is located at the top of the surge arrester. The inner wall of the fixed cylinder has a sliding hole, and an installation block is slidably connected to the inner wall of the sliding hole. A sliding cylinder is fixedly connected to one side of the outer wall of the installation block. The outer wall of the sliding cylinder is slidably connected to the inner wall of the fixed cylinder. A fixed plate is provided at the top of the sliding cylinder. A through hole is provided on the outer wall of the fixed plate. An installation groove is provided at the top of the fixed cylinder. A rubber ring is installed inside the installation groove. An extrusion block is slidably connected to the inner wall of the installation groove.
[0007] As a specific embodiment of the technical solution of this application, an installation sleeve is fixedly connected to the top of the extrusion block, and the inner wall of the installation sleeve is rotatably connected to the outer wall of the sliding cylinder.
[0008] As a specific embodiment of the technical solution of this application, the top of the inner wall of the mounting sleeve is provided with a slope, which cooperates with the outer wall of the extrusion block.
[0009] As a specific embodiment of the technical solution of this application, the inner wall of the mounting sleeve is provided with a threaded groove, which engages with the threaded groove provided on the outer wall of the sliding cylinder.
[0010] As a specific embodiment of the technical solution of this application, a cable is slidably connected to the inner wall of the sliding cylinder, and one end of the cable is connected to the top of the surge arrester.
[0011] As a specific embodiment of the technical solution of this application, the other end of the cable passes through the central hole at the top of the mounting sleeve and is connected to the grounding device.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This railway catenary lightning protection device effectively reduces damage caused by wear, bending, or external forces by installing protective devices at the interface between the cable and the surge arrester. This prevents the cable leads at the interface from easily breaking or loosening due to external pulling or impact, ensuring the stability and electrical performance of the connection between the leads and the surge arrester, and ensuring a secure connection between the surge arrester and the cable. This extends the service life of both the surge arrester and the cable. The application of this protective device not only improves the reliability and safety of the railway catenary system and ensures the normal operation of trains, but also reduces the frequency of maintenance and replacement due to cable lead damage, thus lowering operating costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the protective component structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the explosion structure of the protective component of this utility model.
[0017] In the diagram: 1. Support column; 2. Fixing frame; 3. Lightning arrester; 4. Protective components; 401. Fixing cylinder; 402. Mounting sleeve; 403. Cable; 404. Sliding hole; 405. Mounting groove; 406. Rubber ring; 407. Mounting block; 408. Through hole; 409. Fixing plate; 410. Threaded groove; 411. Extrusion block; 412. Sliding cylinder. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.
[0020] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.
[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.
[0022] like Figures 1-3 As shown, it includes a support column 1 and a fixed frame 2 installed on the outer wall of the support column 1. A surge arrester 3 is installed on the top of the fixed frame 2. A protective component 4 is set on the top of the surge arrester 3. The protective component 4 is used to protect the interface between the cable 403 and the surge arrester 3.
[0023] like Figures 1-3As shown, to protect the interface between cable 403 and surge arrester 3 and reduce the risk of disconnection due to wear, bending, or external force, a protective component 4 is installed at the top of surge arrester 3. Specifically, the protective component 4 includes a fixed cylinder 401, which is located at the top of surge arrester 3. The inner wall of the fixed cylinder 401 has a sliding hole 404, and a mounting block 407 is slidably connected to the inner wall of the sliding hole 404. A sliding cylinder 412 is fixedly connected to one side of the outer wall of the mounting block 407, and the outer wall of the sliding cylinder 412 is slidably connected to the inner wall of the fixed cylinder 401. A fixed plate 409 is provided at the top of the sliding cylinder 412, and a through hole 408 is provided on the outer wall of the fixed plate 409. An installation groove 405 is provided at the top of the fixed cylinder 401. An internal rubber ring 406 is installed. An extrusion block 411 is slidably connected to the inner wall of the mounting groove 405. An mounting sleeve 402 is fixedly connected to the top of the extrusion block 411. The inner wall of the mounting sleeve 402 is rotatably connected to the outer wall of the sliding cylinder 412. A ramp is provided at the top of the inner wall of the mounting sleeve 402, which cooperates with the outer wall of the extrusion block 411. A threaded groove 410 is provided on the inner wall of the mounting sleeve 402, which meshes with the thread on the outer wall of the sliding cylinder 412. A cable 403 is slidably connected to the inner wall of the sliding cylinder 412. One end of the cable 403 is connected to the top of the surge arrester 3, and the other end of the cable 403 passes through the central hole at the top of the mounting sleeve 402 and is connected to the grounding device. It should be noted that in this embodiment, protection is required at the interface between the cable 403 and the surge arrester 3. At this time, the cable 403 is inserted into the center hole of the mounting sleeve 402 and the sliding cylinder 412 in sequence and slid until one end of the cable 403 protrudes from the sliding cylinder 412. Then, the exposed end of the cable 403 is connected to the high-voltage terminal at the bottom of the inner wall of the fixed cylinder 401 at the top of the surge arrester 3. Then, the sliding cylinder 412 is pushed to slide along the cable 403 into the fixed cylinder 401. At the same time, the mounting block 407 on the outer wall of the sliding cylinder 412 is slid into the sliding hole 404, which can effectively fix the cable 403 and prevent the cable 403 from loosening or falling off due to vibration or external force. Then, the mounting sleeve 402 is slid along the outer wall of the cable 403 until it is completely fitted on the outer wall of the sliding cylinder 412 and the mounting sleeve 402 is rotated. During the rotation, the mounting sleeve 402... The threaded groove 410 on the inner wall of the sliding cylinder 412 engages with the thread on the outer wall of the sliding cylinder 412, allowing the mounting sleeve 402 to move downwards along the outer wall of the sliding cylinder 412 while rotating. This ensures a smooth downward movement of the mounting sleeve 402 during rotation, preventing slippage or loosening due to external forces. Furthermore, as the mounting sleeve 402 moves, the slope at the top of its inner wall contacts the outer wall of the fixing plate 409, gradually squeezing the fixing plate 409 as it moves downwards. Simultaneously, the through hole 408 on the outer wall of the fixing plate 409, when squeezed, causes the fixing plate 409 to contract inwards, thus evenly clamping the cable 403. This ensures the cable 403 is securely fixed inside the sliding cylinder 412, preventing loosening due to vibration or external forces. It also facilitates cable replacement or maintenance.It allows for quick disassembly, facilitating maintenance and replacement. It's also important to understand that in this embodiment, when the mounting sleeve 402 rotates downwards, the compression block 411 at the bottom of the mounting sleeve 402 compresses the rubber ring 406 inside the mounting groove 405. The rubber ring 406 generates friction after being compressed, preventing the mounting sleeve 402 from accidentally loosening or retracting during operation, thus providing a self-locking function. Simultaneously, compressing the rubber ring 406 causes it to elastically deform, tightly fitting against the inner wall of the mounting groove 405, forming a good seal. This helps prevent dust, moisture, or other impurities from entering the device, protecting internal components from external environmental influences. Furthermore, in this embodiment, the disconnection device for the railway contact network lightning protection equipment uses a thermal explosion disconnector. The disconnector is installed at the bottom of the surge arrester 3. When the surge arrester 3 malfunctions, the disconnector automatically operates, disconnecting the faulty surge arrester 3 from the system, thereby preventing the fault from escalating. Since this disconnector is prior art, it is not shown in the structural diagram.
[0024] When installing a protective device at the interface between cable 403 and surge arrester 3, cable 403 is inserted sequentially through the central holes of mounting sleeve 402 and sliding cylinder 412 and slid. Then, the exposed lead of cable 403 is connected to the high-voltage terminal at the bottom of the inner wall of the fixed cylinder 401 at the top of surge arrester 3. Subsequently, the sliding cylinder 412 is pushed to slide along cable 403 into the fixed cylinder 401, so that the mounting block 407 on the outer wall of the sliding cylinder 412 slides into the sliding hole 404, which can effectively fix cable 403 and prevent cable 403 from loosening or falling off due to vibration or external force. Then, the mounting sleeve 402 is placed on the outer wall of the sliding cylinder 412 and the mounting sleeve 402 is rotated, so that the mounting sleeve 402 moves downward along the outer wall of the sliding cylinder 412 during rotation and gradually squeezes the fixed plate 409. When squeezed, the through hole 408 on the outer wall of the fixed plate 409 will move. The fixing plate 409 retracts inward, thereby evenly clamping the cable 403 and ensuring that the cable 403 is securely fixed inside the sliding cylinder 412, preventing it from loosening due to vibration or external force. Simultaneously, it allows for quick disassembly for cable 403 replacement or maintenance, facilitating inspection and replacement. Furthermore, as the mounting sleeve 402 rotates downward, the pressing block 411 at the bottom of the mounting sleeve 402 presses against the rubber ring 406 inside the mounting groove 405, generating friction. This friction prevents the mounting sleeve 402 from accidentally loosening or retracting during operation, acting as a self-locking mechanism. Simultaneously, pressing the rubber ring 406 causes it to elastically deform, tightly fitting against the inner wall of the mounting groove 405, forming a good seal. This helps prevent dust, moisture, or other impurities from entering the device, protecting internal components from external environmental influences.
[0025] In summary, this utility model includes a support column 1 and a fixed frame 2 installed on the outer wall of the support column 1. A surge arrester 3 is installed at the top of the fixed frame 2, and a protective component 4 is installed at the top of the surge arrester 3. The protective component 4 is used to protect the interface between the cable 403 and the surge arrester 3, which can effectively reduce damage caused by wear, bending, or external force, thereby avoiding damage to the cable sheath and ensuring the stability and electrical performance of the cable 403 connection. Under the combined action of the ramp at the top of the inner wall of the mounting sleeve 402 and the fixed plate 409, through hole 408, and extrusion block 411 rubber ring 406, the mounting sleeve 402 gradually squeezes the fixed plate 409 as it moves downward. When the through hole 408 is squeezed, it causes the fixed plate 409 to contract inward and clamp the cable 403, preventing the cable 403 from loosening due to vibration or external force. This effectively reduces damage caused by wear, bending, or external force, thereby avoiding damage to the cable sheath and ensuring the stability of the cable 403 connection. It has good electrical performance, and when the cable 403 needs to be replaced or maintenance is required, it can be quickly disassembled for easy inspection and replacement. At the same time, as the mounting sleeve 402 moves downward, the extrusion block 411 extrudes the rubber ring 406 and generates a certain friction. This friction can effectively prevent the mounting sleeve 402 from accidentally loosening or retracting during operation, and play a self-locking role, so that it fits tightly against the inner wall of the mounting groove 405, forming a good sealing effect. This helps to prevent dust, moisture or other impurities from entering the device and protect the internal components from the influence of the external environment.
[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.
Claims
1. A lightning protection device for railway overhead contact lines, comprising a support column and a fixed frame installed on the outer wall of the support column, wherein a lightning arrester is installed at the top of the fixed frame, characterized in that: The protective component, located at the top of the surge arrester, is used to protect the interface between the cable and the surge arrester. The protective component includes a fixed cylinder, which is disposed at the top of the surge arrester. A sliding hole is provided on the inner wall of the fixed cylinder, and an installation block is slidably connected to the inner wall of the sliding hole. A sliding cylinder is fixedly connected to one side of the outer wall of the installation block. The outer wall of the sliding cylinder is slidably connected to the inner wall of the fixed cylinder. A fixed plate is provided at the top of the sliding cylinder, and a through hole is provided on the outer wall of the fixed plate. An installation groove is provided at the top of the fixed cylinder, and a rubber ring is installed inside the installation groove. An extrusion block is slidably connected to the inner wall of the installation groove.
2. The lightning protection device for railway catenary according to claim 1, characterized in that: An installation sleeve is fixedly connected to the top of the extrusion block, and the inner wall of the installation sleeve is rotatably connected to the outer wall of the sliding cylinder.
3. A lightning protection device for railway overhead contact lines according to claim 2, characterized in that: The top of the inner wall of the mounting sleeve is provided with a ramp, which matches the outer wall of the extrusion block.
4. A lightning protection device for railway overhead contact lines according to claim 3, characterized in that: The inner wall of the mounting sleeve has a threaded groove, which engages with the thread on the outer wall of the sliding cylinder.
5. A lightning protection device for railway overhead contact lines according to claim 1, characterized in that: A cable is slidably connected to the inner wall of the sliding cylinder, and one end of the cable is connected to the top of the surge arrester.
6. A lightning protection device for railway overhead contact lines according to claim 5, characterized in that: The other end of the cable passes through the center hole at the top of the mounting sleeve and is connected to the grounding device.