Arrester state acquisition box for train

Abstract

The utility model discloses a lightning arrester state acquisition box for a train, which relates to the technical field of rail transit electricity and comprises a shell, a leakage current sensor, an impact current sensor, a lightning arrester, a first mounting plate and a lightning arrester grounding pole. The lightning arrester, the lightning arrester grounding pole and the shell are all fixedly installed on the first installation plate, the first installation plate is arranged on the top of a train, the shell is fixedly installed on the leakage current sensor, the impact current sensor is arranged in the shell, one end, provided with the leakage current sensor, of the shell is connected with the lightning arrester, and the other end, provided with the impact current sensor, of the shell is connected with the impact current sensor. One end provided with the impulse current sensor is connected with the lightning-protection grounding pole; the leakage current sensor is used for detecting the earth leakage current of the lightning arrester and collecting the waveform data of the leakage current; the beneficial effects of the utility model are that real-time on-line detection of the state of the lightning arrester on the roof can be realized, and the safety and reliability of train operation can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of rail transit electrical technology, and more specifically, to a status acquisition box for a train surge arrester. Background Technology

[0002] During train operation, the surge arrester on the train roof is a crucial component of its electrical system, primarily protecting it from damage caused by lightning strikes or overvoltages. The operating status of the surge arrester directly impacts the train's safety and the reliability of the electrical system. However, due to prolonged exposure to the complex environment of the train roof (such as high-voltage electric fields, lightning strikes, temperature and humidity variations, and pollution), the performance of the surge arrester may gradually degrade. Therefore, real-time online monitoring of the surge arrester's operating status is essential to ensure the safety of train operation.

[0003] Currently, the condition monitoring of train surge arresters mainly includes the detection of leakage current and impulse current. Leakage current is a crucial indicator of the arrester's health status; an abnormal increase in leakage current usually signifies a decline in the arrester's internal insulation performance or equipment aging. Impulse current, on the other hand, is a key parameter protecting the arrester's system when subjected to lightning strikes or overvoltage. By monitoring the magnitude, duration, and waveform characteristics of the impulse current, the arrester's operation and health status can be recorded. The collection and analysis of these parameters are of great significance for the safe management of train operations. In the railway transportation sector, train surge arresters, as vital devices protecting train electrical systems from lightning strikes and overvoltage damage, have always received considerable attention for their condition monitoring. Currently, there are two main forms of condition acquisition technology for train surge arresters: one is integrating the arrester with the arrester itself, and the other is combining the arrester with relevant condition acquisition components within a high-voltage box. While both methods achieve some degree of arrester condition monitoring, they also have some significant limitations.

[0004] First, integrating the status acquisition function with the surge arrester limits the flexibility and maintainability of the acquisition system. If the surge arrester fails or needs replacement, the entire acquisition system may also need to be replaced, increasing maintenance costs and complexity. Furthermore, this integrated design makes it difficult to adapt to different models and specifications of surge arresters, limiting its versatility. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, a train surge arrester status acquisition box has been developed, which can realize real-time online detection of the status of the roof surge arrester, effectively improving the safety and reliability of train operation.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a status acquisition box for a train surge arrester, the improvement of which is that it includes: a housing, a leakage current sensor, an impulse current sensor, a surge arrester, a first mounting plate, and a surge arrester grounding post;

[0007] The surge arrester, surge arrester grounding post, and housing are all fixedly mounted on the first mounting plate, which is located on the top of the train. The housing is fixedly mounted on the leakage current sensor, and the impulse current sensor is located inside the housing. One end of the housing with the leakage current sensor is connected to the surge arrester, and the other end with the impulse current sensor is connected to the surge arrester grounding post. The leakage current sensor is used to detect the leakage current to ground of the surge arrester and collect the leakage current waveform data. The impulse current sensor is used to detect the impulse current waveform signal when the surge arrester experiences overvoltage or lightning strike.

[0008] In the above structure, the status acquisition box for a train surge arrester also includes a temperature sensor, which is fixedly installed outside the housing.

[0009] In the above structure, the train surge arrester status acquisition box further includes a first waterproof cable connector and a second waterproof cable connector; the first waterproof cable connector is installed at the end of the housing connected to the surge arrester, and the second waterproof cable connector is installed at the end of the housing connected to the surge arrester connecting post.

[0010] In the above structure, the train surge arrester status acquisition box also includes a circuit board and waterproof connectors for incoming and outgoing lines. The circuit board is fixedly installed inside the housing, and the waterproof connectors for incoming and outgoing lines pass through the housing and are connected to the circuit board.

[0011] In the above structure, the housing includes a top cover and a box base, which are detachably connected.

[0012] In the above structure, a viewing window is provided on the top cover.

[0013] In the above structure, the connection between the box base and the first mounting plate is sealed with a sealing strip.

[0014] In the above structure, the train surge arrester status acquisition box further includes a first surge arrester grounding wire and a second surge arrester grounding wire; one end of the first surge arrester grounding wire is connected to the surge arrester, and the other end of the first surge arrester grounding wire is connected to the first waterproof cable connector; one end of the second surge arrester grounding wire is connected to the surge arrester grounding post, and the other end of the second surge arrester grounding wire is connected to the second waterproof cable connector.

[0015] In the above structure, the train surge arrester status acquisition box meets the vibration and shock protection level of IP65 when installed on the train.

[0016] The beneficial effects of this utility model are: it can realize real-time online detection of the status of the roof lightning arrester, effectively improving the safety and reliability of train operation. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of a train lightning arrester status acquisition box according to the present invention;

[0018] Figure 2 This is an internal structural diagram of a train lightning arrester status acquisition box according to the present invention. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Secondly, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] See Figures 1-2 This utility model provides a status acquisition box for a train surge arrester, including 1, a housing 10, a leakage current sensor 20, an impulse current sensor 30, a surge arrester 50, a first mounting plate 40, and a surge arrester grounding post 60.

[0023] The surge arrester 50, surge arrester grounding post 60, and housing 10 are all fixedly mounted on the first mounting plate 40, which is located on the top of the train. The housing 10 is fixedly mounted on the leakage current sensor 20, and the impulse current sensor 30 is located inside the housing 10. One end of the housing 10 with the leakage current sensor 20 is connected to the surge arrester 50, and the other end with the impulse current sensor 30 is connected to the surge arrester grounding post. The leakage current sensor 20 is used to detect the leakage current to ground of the surge arrester 50 and collect the leakage current waveform data. The impulse current sensor 30 is used to detect the waveform signal of the impulse current, its magnitude, duration, and shape, when the surge arrester 50 experiences overvoltage or lightning strike.

[0024] By monitoring leakage current and impulse current, potential hazards or abnormalities in surge arrester 50 can be detected in a timely manner, effectively preventing electrical system failures and ensuring safe train operation. The train surge arrester status acquisition box does not require modification of the existing surge arrester 50 or high-voltage box structure; it only needs to be installed near the surge arrester 50, making installation convenient, highly adaptable, and suitable for retrofitting existing train equipment. In the event of a fault, the acquisition box can be quickly replaced without replacing the entire surge arrester 50 device, reducing maintenance difficulty and costs.

[0025] Temperature changes can affect the insulation performance and operating characteristics of surge arrester 50. Data from temperature sensor 70 can be combined with leakage current and impulse current data. Temperature sensor 70 can monitor the ambient temperature around the acquisition box in real time, providing important reference data for surge arrester 50 condition assessment and helping to analyze the impact of temperature on leakage current and impulse current. Therefore, a surge arrester condition acquisition box for trains also includes temperature sensor 70, which is fixedly installed outside the housing 10. By monitoring the ambient temperature, early warnings can be given for equipment abnormalities or failures caused by high or extreme temperatures, improving the stability and safety of system operation.

[0026] The train surge arrester status acquisition box further includes a first waterproof cable connector 501 and a second waterproof cable connector 503; the first waterproof cable connector is installed at the end of the housing 10 connected to the surge arrester 50, and the second waterproof cable connector 503 is installed at the end of the housing 10 connected to the connecting post of the surge arrester 50.

[0027] Furthermore, the aforementioned train surge arrester status acquisition box also includes a first waterproof cable connector 501 and a second waterproof cable connector 503; the first waterproof cable connector is installed at the end of the housing 10 connected to the surge arrester 50, and the second waterproof cable connector 503 is installed at the end of the housing 10 connected to the connecting post of the surge arrester 50. The waterproof cable connectors effectively prevent external factors such as rainwater, moisture, and dust from entering the housing 10 through the cable interface, protecting internal components such as the leakage current sensor 20 and the impulse current sensor 30 from damage, and improving the equipment's protection level. Especially in environments like train roofs exposed to wind, rain, and harsh weather, waterproof design is particularly important to ensure long-term stable operation of the equipment. It avoids problems such as short circuits and corrosion caused by water ingress or other external substances, protecting the housing 10 and internal equipment, extending the overall service life of the acquisition box, and reducing the frequency of maintenance and replacement.

[0028] The aforementioned train surge arrester status acquisition box also includes a circuit board 80 and waterproof connectors 90 for incoming and outgoing lines. The circuit board 80 is fixedly installed inside the housing 10, and the waterproof connectors 90 pass through the housing 10 and connect to the circuit board 80. The circuit board 80 is used to acquire and process data from the leakage current sensor 20, the impulse current sensor 30, and the temperature sensor 70. Through reasonable circuit design, the signals are amplified, filtered, and digitized to ensure the accuracy and stability of the data. The waterproof connectors 90, passing through the housing 10 and connecting to the circuit board 80, effectively prevent moisture, dust, oil, etc., from entering the housing 10, protecting the circuit board 80 and other electronic components from external environmental damage.

[0029] Furthermore, the housing 10 includes a top cover 101 and a base 102, which are detachably connected. This detachable connection allows technicians to quickly open the data acquisition box during installation or maintenance to inspect and repair the internal circuit boards 80, sensors, and cables. The detachable connection ensures that removing the top cover 101 does not affect the base's fixation, protecting the internal components from damage during maintenance and reducing safety risks during operation. The detachable connection typically employs sealing strips or other sealing designs to ensure a tight fit between the top cover 101 and the base while enhancing waterproof, dustproof, and shockproof performance, adapting to the harsh operating environment on the train roof. The top cover 101 is equipped with a viewing window 1011. The viewing window 1011 is suitable for routine inspections, especially in complex operating environments or with limited maintenance space, reducing the difficulty and time-consuming nature of manual inspections. The connection between the base 102 and the first mounting plate 40 is sealed with a sealing strip. The sealing strip's high durability and easy replacement are crucial in the complex operating environment of trains, especially at high speeds where they are exposed to significant amounts of dust and particulate matter. The sealing strip prevents these particles from entering the data acquisition box, avoiding contamination or damage to the circuit board 80 and sensors, reducing equipment failure rates due to environmental impact, and thus lowering long-term maintenance costs.

[0030] Specifically, the train surge arrester status acquisition box further includes a first surge arrester grounding wire 502 and a second surge arrester grounding wire 504; one end of the first surge arrester grounding wire 502 is connected to the surge arrester 50, and the other end is connected to the first waterproof cable connector 501; one end of the second surge arrester grounding wire 504 is connected to the surge arrester grounding post 60, and the other end is connected to the second waterproof cable connector 503. The train surge arrester status acquisition box meets the vibration and shock protection level of IP65 when installed on the train. The IP65 protection level consists of two parts: IP6X: dustproof level 6, indicating complete protection against dust intrusion and effective protection of internal equipment in any dusty environment. IPX5: waterproof level 5, indicating the ability to withstand low-pressure water flow impacts from all directions without causing harmful effects on the equipment. The IP65 level design reduces safety hazards caused by equipment failure, providing a more reliable operating environment for the train.

[0031] The beneficial effects of this utility model are: it can realize real-time online detection of the status of the roof lightning arrester, effectively improving the safety and reliability of train operation.

[0032] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A status acquisition box for a train surge arrester, characterized in that, Includes: housing, leakage current sensor, impulse current sensor, surge arrester, first mounting plate, and surge arrester grounding post; The surge arrester, surge arrester grounding post, and housing are all fixedly mounted on the first mounting plate, which is located on the top of the train. The housing is fixedly mounted on the leakage current sensor, and the impulse current sensor is located inside the housing. One end of the housing with the leakage current sensor is connected to the surge arrester, and the other end with the impulse current sensor is connected to the surge arrester grounding post. The leakage current sensor is used to detect the leakage current to ground of the surge arrester and collect the leakage current waveform data. The impulse current sensor is used to detect the impulse current waveform signal when the surge arrester experiences overvoltage or lightning strike.

2. The status acquisition box for a train surge arrester according to claim 1, characterized in that, The train lightning arrester status acquisition box also includes a temperature sensor, which is fixedly installed on the outside of the housing.

3. The status acquisition box for a train surge arrester according to claim 1, characterized in that, The train surge arrester status acquisition box further includes a first waterproof cable connector and a second waterproof cable connector; the first waterproof cable connector is installed at the end of the housing connected to the surge arrester, and the second waterproof cable connector is installed at the end of the housing connected to the surge arrester connecting post.

4. The status acquisition box for a train surge arrester according to claim 1, characterized in that, The train surge arrester status acquisition box also includes a circuit board and waterproof connectors for incoming and outgoing lines. The circuit board is fixedly installed inside the housing, and the waterproof connectors for incoming and outgoing lines pass through the housing and are connected to the circuit board.

5. A status acquisition box for a train surge arrester according to claim 1, characterized in that, The housing includes a top cover and a base, which are detachably connected.

6. A train surge arrester status acquisition box according to claim 5, characterized in that, A viewing window is provided on the top cover.

7. A train surge arrester status acquisition box according to claim 5, characterized in that, The connection between the base of the box and the first mounting plate is sealed with a sealing strip.

8. A status acquisition box for a train surge arrester according to claim 3, characterized in that, The train surge arrester status acquisition box further includes a first surge arrester grounding wire and a second surge arrester grounding wire; one end of the first surge arrester grounding wire is connected to the surge arrester, and the other end of the first surge arrester grounding wire is connected to the first waterproof cable connector; one end of the second surge arrester grounding wire is connected to the surge arrester grounding post, and the other end of the second surge arrester grounding wire is connected to the second waterproof cable connector.

9. A status acquisition box for a train surge arrester according to claim 1, characterized in that, The status acquisition box for the train surge arrester meets the vibration and shock protection level of IP65 when installed on the train.

Images