Portable insulation device for passenger train DC110V trunk line electric leakage detection

Abstract

The utility model discloses a portable insulation device for passenger train DC110V trunk line electric leakage detection, and belongs to the field of electrical maintenance. The two measuring ends of one voltage transmitter of the device are electrically connected with the positive electrode of a DC110V main line and a ground wire respectively, and the two measuring ends of the other voltage transmitter are electrically connected with the negative electrode of the DC110V main line and the ground wire respectively. The signal output ends of the two voltage transmitters are electrically connected with the recording and displaying mechanism. The recording and displaying mechanism is configured to receive the voltage values output by the two voltage transmitters, generate quadrant coordinates respectively and visually display the quadrant coordinates; an external power supply interface of the modularized UPS is electrically connected with a mains supply; the recording and displaying mechanism and the two voltage transmitters are electrically connected with the modularized UPS power supply. And the shell is made of an insulating material. According to the invention, the functions of no measurement error, simple maintenance and calibration, and visual display and long-term recording of data are realized, and subsequent maintenance work can be facilitated.

Description

Technical Field

[0001] The present application relates to the field of electrical maintenance technology, and in particular to a portable insulation device for detecting leakage in a DC110V main line of a passenger train. Background Art

[0002] my country's railway industry is booming at an unprecedented pace, and rail passenger transport has become the preferred mode of transportation. The dense distribution of various electrical equipment and power cables within trains makes insulation aging and mechanical damage highly susceptible, leading to a series of accidents such as leakage and fire, posing a significant threat to personal safety. This places higher demands on insulation testing. DC110V is commonly used in passenger train lighting circuits, electrical control circuits, and backup lighting energy storage. Given its wide range of uses and diverse types, routine insulation testing of DC110V power lines has become essential to ensure the quality and safety of railway passenger train operations.

[0003] The insulation detection principles of 110V DC are generally divided into current mutual induction detection, resistance estimation detection, and voltage offset detection. The existing DC110V insulation detection devices on passenger trains mainly use the "current mutual induction detection" and "resistance estimation detection" principles.

[0004] The TLMK-110 is a representative product for current mutual inductance detection. This device uses a magnetic induction coil and a conditioning module to perform "mutual inductance" measurements. When leakage occurs in a circuit, it provides feedback on the PLC display as a low-level digital signal. However, mutual inductance circuits are susceptible to interference from strong magnetic fields and currents, leading to frequent false alarms with this type of device. The low-level digital signal also has a limited range, making calibration complex and repair-inconvenient in the event of a fault.

[0005] Representative products for resistance estimation testing are the KLB-11-DC110 and NK-1-110D devices. Both utilize a microcontroller as their core control unit and a built-in rated resistor to perform time-sharing testing of positive and negative leakage current, estimate the insulation resistance and voltage of the main line, and use a buzzer and diode as an alarm reference. These devices lack a visual display of the alarm time, number of occurrences, current, and voltage at the time of the alarm, and a lack of a recording function, making it difficult for inspectors to identify the fault. Due to the non-intuitive alarm display, these devices require daily manual calibration, often using a homemade 15-watt linear resistance bulb. These crude tools often result in injuries and electric shocks. Utility Model Content

[0006] The embodiment of the present application provides a portable insulation device for detecting leakage in the DC110V main line of a passenger train, which can solve the problems of the existing device being prone to false alarms, having a complex equipment calibration process, being inconvenient to maintain, and having an unintuitive alarm display.

[0007] An embodiment of the present utility model provides a portable insulation device for detecting leakage of a DC110V main line of a passenger train, comprising a shell, a voltage transmitter, a recording and display mechanism, and a modular UPS power supply; the voltage transmitter comprises two, the two measuring ends of one voltage transmitter are electrically connected to the positive pole and the ground wire of the DC110V main line, respectively, and the two measuring ends of the other voltage transmitter are electrically connected to the negative pole and the ground wire of the DC110V main line, respectively; the signal output ends of the two voltage transmitters are electrically connected to the recording and display mechanism; the recording and display mechanism is configured to receive the voltage values ​​output by the two voltage transmitters and generate quadrant coordinates respectively and display them visually; the modular UPS power supply comprises an external power supply interface, which is electrically connected to the mains; the recording and display mechanism and the two voltage transmitters are electrically connected to the modular UPS power supply respectively; the shell is made of insulating material, and the two voltage transmitters, the recording and display mechanism, and the modular UPS power supply are all arranged in the shell.

[0008] In one possible implementation, the portable insulation device for detecting leakage in a DC110V main line of a passenger train further includes a battery; the modular UPS power supply further includes a battery power supply interface; and the battery is electrically connected to the battery power supply interface.

[0009] In a possible implementation, the shell further includes a handle provided on the top surface.

[0010] In a possible implementation, the portable insulation device for detecting leakage in a DC110V main line of a passenger train further includes an alarm; the alarm is electrically connected to the recording and display mechanism.

[0011] In a possible implementation, the recording and display mechanism is provided with a data transmission interface.

[0012] In a possible implementation, the measurement range of the voltage transmitter is 0V-150V.

[0013] In a possible implementation, the recording and display mechanism includes a paperless recorder.

[0014] In a possible implementation, the capacity of the voltage transmitter and / or the number of detection channels of the paperless recorder can be adjusted.

[0015] In a possible implementation, the portable insulation device transmits the alarm information to a network terminal of the background monitoring system through a gateway.

[0016] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0017] In an embodiment of the present invention, a voltage offset measurement method is used, and based on the principle of a two-voltage divider circuit, voltage transmitters are respectively configured on the positive and negative grounds to perform precise measurements. The topology is practically applied to the circuit, and is combined with a recording and display mechanism. It is not affected by strong magnetic fields and strong currents, and will not cause false alarms. It achieves error-free measurement, simple maintenance and calibration, and intuitive display and long-term recording of data. Compared with traditional technologies, its modular structural design greatly facilitates subsequent maintenance work. In addition, the portable insulation device also has a detailed historical recording function, which can intuitively display and trace back fault records, alarm time and specific leakage data, providing an accurate and reliable basis for troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A circuit diagram of a portable insulation device for detecting leakage in a DC110V main line of a passenger train, provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a portable insulation device for detecting leakage in a DC110V main line of a passenger train provided in an embodiment of the present application;

[0021] Icons: 1-housing; 11-handle; 2-voltage transmitter; 3-recording and display mechanism; 4-modular UPS power supply; 5-battery. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0024] Please refer to Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a portable insulation device for detecting leakage of a DC110V main line of a passenger train, comprising a housing 1, a voltage transmitter 2, a recording and display mechanism 3 and a modular UPS power supply 4.

[0025] The voltage transmitter 2 includes two, and the two measuring ends of one voltage transmitter 2 are electrically connected to the positive pole of the DC110V main line and the ground wire respectively, for measuring the voltage value of the positive pole of the DC110V main line to the ground (that is, the voltage value of the positive pole relative to the metal shell of the vehicle body).

[0026] The two measuring ends of another voltage transmitter 2 are electrically connected to the negative pole of the DC110V main line and the ground wire respectively, and are used to measure the voltage value of the negative pole of the DC110V main line to the ground (that is, the voltage value of the negative pole relative to the metal shell of the vehicle body).

[0027] The signal output terminals of the two voltage transmitters 2 are both electrically connected to the recording and display mechanism 3 .

[0028] The recording and display mechanism 3 is configured to receive the voltage values ​​output by the two voltage transducers 2 and generate quadrant coordinates for each of the values, which are then visually displayed. If the two voltage values ​​are not balanced or equal, this is considered a voltage offset, which can be used to determine leakage. The quadrant coordinates of the recording and display mechanism 3 can be manually observed to determine whether a voltage offset has occurred.

[0029] Of course, a data analysis mechanism may also be included, which is also connected to the signal output terminals of the two transmitters, for respectively receiving the voltage values ​​of the two voltage transmitters 2, and judging whether there is a voltage offset by comparing whether the voltage values ​​of the positive pole to the ground and the negative pole to the ground are balanced, thereby determining whether there is a leakage.

[0030] Specifically, the data analysis agency first receives real-time data from the two voltage transmitters 2. This data is transmitted to the data analysis agency in the form of electrical signals. Once the data is received, the data analysis agency immediately activates its built-in comparison algorithm. This algorithm is based on precise mathematical models and electrical principles, and can perform a meticulous comparison of the voltage values ​​of the positive pole to ground and the negative pole to ground. Under normal circumstances, due to the integrity of electrical insulation, the voltage values ​​of the positive pole and the negative pole to ground should remain equal or close, forming a stable voltage balance state. However, when a leakage occurs in the train power system, this balance state will be broken. The leakage will cause the voltage value of the positive pole or negative pole to ground to shift, making the two sets of voltage values ​​no longer equal. By capturing this subtle change, the data analysis agency can accurately determine whether there is a voltage offset phenomenon.

[0031] Furthermore, data analysis can infer the severity of leakage and the possible fault location based on the degree and trend of voltage deviation. This function is crucial for promptly identifying and addressing potential electrical safety hazards. It helps us quickly locate and repair leakage points, thereby ensuring the safe and stable operation of the train power system. Furthermore, the data analysis system can record voltage data trends in real time and store this information in internal memory. This historical data is extremely valuable for subsequent troubleshooting, preventive maintenance, and system performance evaluation. Regular analysis of this data provides a more comprehensive understanding of the insulation condition and operating patterns of the train power system.

[0032] The data analysis mechanism can be integrated into the recording and display mechanism 3. The integrated design not only optimizes the overall structure of the portable insulation device, but also significantly improves the efficiency of data processing and the convenience of operation. In the integrated design, the hardware components of the data analysis mechanism (such as the processor, memory, etc.) can share some resources with the hardware components of the recording and display mechanism 3 (such as the display screen, memory, communication interface, etc.), or communicate at high speed through an internal bus. At the same time, the software components of the data analysis mechanism (such as algorithms, drivers, etc.) can also be embedded in the software system of the recording and display mechanism 3 to form a unified whole.

[0033] By integrating the data analysis mechanism into the recording and display mechanism 3, the structure of the entire portable insulation device becomes more compact, reducing the space occupied. This is especially important for portable insulation devices that need to be installed in a limited space. The integrated design allows data to complete the entire process from collection to analysis within the recording and display mechanism 3 without the need for transmission through additional data cables or communication interfaces. This not only reduces the delay in data transmission, but also improves the real-time and accuracy of data processing. Operators can complete operations such as viewing, analyzing, and exporting data simply through the interface of the recording and display mechanism 3, without switching between different modules or interfaces. This integrated operating experience significantly improves work efficiency and user satisfaction.

[0034] The modular UPS power supply 4 includes an external power interface electrically connected to the mains power supply. This interface is used to power the entire device via the external power supply. The recording and display mechanism 3 and the two voltage transducers 2 are each electrically connected to the modular UPS power supply 4, thereby allowing the mains power to power the recording and display mechanism 3 and the two voltage transducers 2.

[0035] The housing 1 is made of insulating material, and the two voltage transmitters 2, the recording and display mechanism 3 and the modular UPS power supply 4 are all arranged in the housing 1. The housing 1 protects the components arranged in its inner cavity.

[0036] In addition to the electrical isolation provided by the insulating material housing itself, the portable insulation device of the present application embodiment can also be equipped with multiple safety features and protective measures. For example, the portable insulation device is internally provided with protection circuits for overcurrent, overvoltage, short circuit, and overheating to prevent abnormal situations. Furthermore, the housing 1 is also affixed with prominent safety warning signs and operating instructions to remind users to pay attention to safety and correct operation during use.

[0037] In an embodiment of the present invention, a voltage offset measurement method is used, and based on the principle of a two-voltage divider circuit, a voltage transmitter 2 is configured on the positive and negative grounds respectively to perform precise measurements. The topology is practically applied to the circuit, and is combined with a recording and display mechanism 3. It is not affected by strong magnetic fields and strong currents, and will not cause false alarms. This achieves error-free measurement, simple maintenance and calibration, and intuitive data display and long-term recording. Compared to traditional technologies, its modular structural design greatly facilitates subsequent maintenance work. In addition, the device also has a detailed historical recording function that can intuitively display and trace back fault records, alarm times, and specific leakage data, providing an accurate and reliable basis for troubleshooting.

[0038] Furthermore, its wide applicability can be expanded to other voltage levels by replacing the capacity of the voltage transmitter 2, and the data export function facilitates unified management. The portable insulation device's housing 1 provides insulation protection against electric shock and features a secure and reliable connection, ensuring safe use while significantly enhancing portability. This represents a significant advancement in insulation testing technology for railway passenger transport.

[0039] Furthermore, if Figure 1 As shown, the portable insulation device for detecting leakage in a DC 110V main line of a passenger train further includes a battery 5. The modular UPS power supply 4 further includes a battery power supply interface. The battery 5 is electrically connected to the battery power supply interface. The battery 5 can be used to power the entire device.

[0040] For example, the portable insulation device can use a 12V 9Ah lead-acid battery as its battery 5, with a JY60-12 switching power supply providing voltage regulation and rectification to meet the power requirements of the entire device. This built-in 12V 9Ah lead-acid battery can power the device for 3-5 hours of continuous operation without an external power source, ensuring continuity and reliability of testing.

[0041] When connected to a 220V mains supply, the modular UPS power supply 4 rectifies the AC power into stable DC power, which powers the entire portable insulation device and simultaneously charges the built-in battery 5. This design allows users to easily access the mains power in environments with an external power source, providing continuous and stable power support for the portable insulation device. When the external power source is stable and available, the system automatically switches to external power supply mode and charges the battery 5. If the external power source is interrupted or unstable, the system quickly switches to battery 5 power supply mode, ensuring the portable insulation device continues to operate normally.

[0042] like Figure 2 As shown, the housing 1 also includes a handle 11 provided on the top surface, thereby improving the portability of the portable insulating device. The handle 11 can also be provided on the side of the housing 1. This design allows users to easily lift and carry the entire portable insulating device, which is extremely convenient whether for on-site testing or long-distance transportation. The handle 11 is usually wrapped with a soft material to increase the comfort of holding and reduce the pressure on the hands when carrying for a long time. Inside the housing 1, the voltage transmitter 2, the data analysis mechanism, the recording and display mechanism 3 and the modular UPS power supply 4 are carefully integrated and laid out. This highly integrated design not only optimizes the internal structure of the portable insulating device, but also significantly improves its overall performance and reliability.

[0043] Furthermore, the portable insulation device for detecting leakage in the DC 110V main line of a passenger train further includes an alarm. The alarm is electrically connected to the recording and display mechanism 3 and is configured to trigger an alarm and record leakage data when a voltage deviation exceeding a preset threshold is detected.

[0044] The alarm can preset one or more voltage offset thresholds based on actual needs. These thresholds represent the upper limit of the acceptable voltage imbalance level for the portable insulation device. Once the comparison algorithm detects that the offset between the positive and negative voltage values ​​relative to ground exceeds the preset threshold, the alarm mechanism is immediately triggered. Once the alarm mechanism is activated, the portable insulation device will emit a clear and audible alarm signal, such as an audible or visual alarm signal, to attract the operator's attention. Simultaneously, the recording and display mechanism 3 can also automatically record current leakage data, including the specific value of the voltage offset, the time of occurrence, and the possible fault location.

[0045] The alarm setting function can also be flexibly configured according to actual needs. Operators can reasonably set the voltage excursion threshold based on factors such as train operation status, power system characteristics, and maintenance experience to ensure the accuracy and reliability of the alarm mechanism.

[0046] Furthermore, the recording and display mechanism 3 is provided with a data transmission interface, thereby having a data export function, capable of exporting leakage detection information to an external storage device. The data transmission interface can adopt various types, such as a USB interface, an RS485 interface, and a wireless data transmission interface (such as WiFi, Bluetooth, etc.).

[0047] The recording and display unit 3 supports data export and backup via a data transmission interface. Operators can export data stored in the recording and display unit 3 to an external storage device or remote server for subsequent data analysis and troubleshooting. Furthermore, to prevent data loss or corruption, the module also supports regular data backup and recovery operations.

[0048] Optionally, the measurement range of the voltage transmitter 2 is 0V-150V. The voltage of the negative pole of the vehicle power supply with a DC110V voltage to the metal shell 1 of the vehicle body (i.e., the ground wire) is 1 / 2VDD=55V; the voltage of the positive pole of the vehicle power supply to the metal shell 1 of the vehicle body is also 1 / 2VDD=55V. Taking into account the complex working conditions of passenger trains in actual operation, especially when the train is running on a catenary line, the DC110V charger it is equipped with may increase the voltage to a maximum of 135V. After disconnecting from the catenary, it is powered by the battery 5 and the voltage may drop to a minimum of 98V. Therefore, the actual charging and discharging voltage range in actual operation can be measured to be 137V to 98V. After substituting the 1 / 2VDD algorithm, the corresponding positive or negative pole voltage range to the ground is 67.5V to 49V. In view of the irregularity and uncertainty of the changes in this voltage range, the utility model uses two "0V~150V voltage transmitters 2" to simultaneously monitor the voltage values ​​of the positive pole of the DC110V trunk line to the ground and the negative pole to the ground, and combines the recording and display mechanism 3 to receive the voltage values ​​output by the two voltage transmitters 2 and generate quadrant coordinates respectively and display them visually. Once the two voltage values ​​are unbalanced and equal, it is a voltage offset, which can be used to determine the leakage situation. After setting the alarm value, the alarm leakage data can be recorded in real time.

[0049] Furthermore, the recording and display mechanism 3 includes a paperless recorder, which can record and display voltage offset data, alarm information and fault time in real time.

[0050] Paperless recorders, as a modern data recording and display device, have been widely used in various industrial monitoring systems, including electric power, chemical industry, petroleum, metallurgy and other fields. In portable insulation devices, paperless recorders also play a vital role. Paperless recorders are usually built based on microprocessors or embedded systems, and are internally integrated with modules such as data acquisition, storage, processing and display. It can receive and process data signals from the monitored system in real time through an interface connection with a sensor or data measurement module. The processed data will be stored in the internal memory and can be presented in real time through display devices such as LCD screens. The recording and display mechanism 3 provides operators with intuitive and comprehensive data recording and display functions by integrating advanced equipment such as paperless recorders.

[0051] The paperless recorder features both quadrant and numerical display functions, providing operators with diverse information presentation methods. The quadrant display intuitively displays the positional relationship between the positive and negative voltage values ​​relative to ground in a coordinate system, helping operators quickly determine whether the voltages are balanced and equal. The numerical display accurately displays the specific value of voltage deviation, as well as key information such as alarm information and fault occurrence time. By generating quadrant coordinates, the balance of the two voltage values ​​can be analyzed in real time. Once a voltage deviation (i.e., an imbalance between the two values) is detected, a leakage condition can be quickly determined.

[0052] In actual operation, when a voltage excursion exceeding a preset threshold is detected, an alarm is immediately triggered, and the relevant information is transmitted to the recording and display unit 3. At this point, the paperless recorder records the voltage excursion data, alarm information, and fault time in real time, and presents them to the operator through both a quadrant display and a numerical display. This allows the operator to quickly understand the current status of the portable insulation device and take appropriate countermeasures.

[0053] Optionally, the capacity of the voltage transmitter 2 and / or the number of detection channels of the paperless recorder can be adjusted. By replacing the capacity of the voltage transmitter 2 or adjusting the number of detection channels of the recording and display module, insulation testing of DC power supply systems of different voltage levels can be expanded.

[0054] Taking into account the user's demand for insulation testing of DC power supply systems with different voltage levels, by providing adjustability of the voltage transmitter 2 capacity and the number of paperless recorder detection channels, users can expand the device to be suitable for DC power supply systems with different voltage levels through simple replacement or adjustment according to actual needs.

[0055] Specifically, the voltage transmitter 2 is responsible for converting the voltage signal of the electrical equipment under test into a standard signal for subsequent processing by the data analysis module. When the user needs to detect a DC system with a higher or lower voltage level, expansion can be easily achieved by simply replacing the original voltage transmitter 2 with a new model of corresponding capacity. The paperless recorder is responsible for recording, storing, and displaying the processing results of the data analysis module in real time. The design of a paperless recorder with adjustable number of detection channels allows users to increase or decrease recording channels according to actual needs. This design not only improves the flexibility of the equipment, but also reduces the user's cost investment, because the user only needs to purchase the required number of recording channels without paying extra for unused channels.

[0056] The portable insulation device transmits the alarm information to the network terminal of the background monitoring system through the gateway, thereby realizing real-time monitoring and comprehensive digital network management.

[0057] In order to achieve communication with the background monitoring system, the utility model also integrates a gateway function. As a bridge connecting different networks or systems, the gateway can encapsulate the alarm information of this portable insulation device in a standard network protocol and transmit it to the designated network terminal via wired or wireless means. In the context of railway operation safety, the main line insulation condition of passenger trains is an important reference indicator to ensure driving safety. In order to transmit the alarm information of this portable insulation device to the railway department's monitoring system in real time, a gateway interface compatible with TCDS (passenger car operation safety monitoring system) is designed. The alarm information can be easily sent to the TCDS network terminal, realizing seamless connection with the railway department's monitoring system. Once the alarm information is successfully transmitted to the TCDS network terminal, the railway department staff can view and process this information in real time through the background monitoring system.

[0058] In the embodiment of the present utility model, the comprehensive data-based management method not only improves work efficiency, but also ensures the accuracy and traceability of information. The background monitoring system can receive and display the alarm information of the portable insulation device in real time, so that the staff can quickly understand the insulation status of the trunk line and take corresponding treatment measures. By collecting and analyzing the alarm data of the portable insulation device, the railway department can further understand the changing trends and potential problems of the trunk line insulation, and provide strong support for subsequent maintenance and optimization. The background monitoring system can also store and query historical alarm records, which is convenient for staff to review and analyze, and ensure continuous improvement of driving safety. During the data transmission process, advanced encryption technology and security measures can be used to ensure the confidentiality, integrity and availability of information. At the same time, the design of the gateway and background monitoring system also fully considers redundancy and fault tolerance mechanisms to improve the reliability and stability of the system.

[0059] In terms of electrical connection and sampling measurement, the utility model can use 4.8mm banana plugs and 4.8mm alligator clips as the main tools for sampling measurement of the measurement target (DC110V main line), and use 0.75 square multi-core soft wires to connect various devices inside the product.

[0060] The 4.8mm banana plug has a large contact area and excellent conductivity, ensuring stable and accurate transmission of current and voltage signals in high voltage environments (such as DC110V). The surface of the plug is wrapped with insulating material to effectively prevent the risk of electric shock and ensure the safety of the operator. The 4.8mm alligator clip can be firmly clamped on the measurement target, allowing stable sampling even in complex or difficult-to-reach environments. The alligator clip is also made of high-quality conductive material to ensure the accuracy of signal transmission. The clamp part is wrapped with insulating material to prevent the operator from accidentally touching the live part, ensuring safe operation. The 0.75 square multi-core soft wire has a thicker wire diameter (0.75 square millimeters) and a multi-core design, which can withstand a large current load while reducing resistance and heat loss, ensuring the stability and accuracy of signal transmission. The surface of the wire is wrapped with insulating material, which improves the electrical safety and service life of the product.

[0061] The portable insulation device for detecting leakage of DC110V main line of passenger train provided by the present invention is described below with a specific embodiment. Figure 1 As shown, the portable insulation device includes two voltage transmitters 2 ( Figure 2 In the example, JK1 and JK2 are connected to the positive and ground wires of the measuring terminal, respectively, to measure the voltage between the positive and ground terminals. JK2 voltage transmitter 2 is connected to the negative and ground wires of the measuring terminal, respectively, to measure the voltage between the negative and ground terminals. The signal output terminals of JK1 and JK2 voltage transmitters are connected to paperless recorders. The paperless recorders use quadrant display and numerical display functions to generate and visualize quadrant coordinates based on the received voltage values ​​between the positive and negative terminals. The data analysis function integrated within the paperless recorders determines whether the voltage values ​​between the positive and negative terminals are balanced, and whether there is voltage offset, thereby determining whether there is leakage at the measuring terminal.

[0062] exist Figure 2 In this example, the JK1 and JK2 voltage transmitters 2 and the paperless recorder are powered by a modular UPS power supply 4, which can be powered directly by the mains via an external power supply interface or by a built-in 12V 9Ah battery 5. When the external power supply is stable and available, the portable isolation device automatically switches to external power mode and charges the battery 5. If the external power supply is interrupted or unstable, the portable isolation device quickly switches to battery 5 mode to ensure continued normal operation.

[0063] As a portable insulation monitoring device, this new model can play an important role in daily maintenance work with its high accuracy, portability, and ease of use. When installed as a fixed device on a passenger train, it can monitor the vehicle's leakage status in real time, providing a solid guarantee for railway operation safety.

[0064] When installed as a fixed device on a passenger train, the portable insulation device can continuously and uninterruptedly monitor the vehicle's insulation and leakage conditions. Due to its compact size and structure, the portable insulation device can easily adapt to various installation environments on the train. Furthermore, its modular design makes troubleshooting and repairs easier for maintenance personnel, significantly reducing maintenance costs and time.

[0065] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0066] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A portable insulation device for detecting leakage in DC110V mains of passenger trains, characterized in that: Including housing, voltage transmitter, recording and display mechanism and modular UPS power supply; The voltage transmitter comprises two, the two measuring ends of one voltage transmitter being electrically connected to the positive pole and the ground wire of the DC110V main line respectively, and the two measuring ends of the other voltage transmitter being electrically connected to the negative pole and the ground wire of the DC110V main line respectively; The signal output terminals of the two voltage transmitters are both electrically connected to the recording and display mechanism; The recording and display mechanism is configured to receive the voltage values ​​output by the two voltage transmitters and generate quadrant coordinates for each of the voltage values ​​and perform visual display; The modular UPS power supply includes an external power interface, which is electrically connected to the mains; The recording and display mechanism and the two voltage transmitters are electrically connected to a modular UPS power supply respectively; The shell is made of insulating material, and the two voltage transmitters, the recording and display mechanism and the modular UPS power supply are all arranged in the shell.

2. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 1, characterized in that: Also includes batteries; The modular UPS power supply also includes a battery power supply interface; The storage battery is electrically connected to the battery power supply interface.

3. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 1, characterized in that: The shell further includes a handle arranged on the top surface.

4. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 1, characterized in that: Also includes alarm; The alarm is electrically connected to the recording and display mechanism.

5. The portable insulation device for detecting leakage in DC110V mains of passenger trains according to claim 1, characterized in that: The recording and display mechanism is provided with a data transmission interface.

6. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 1, characterized in that: The measuring range of the voltage transmitter is 0V-150V.

7. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 1, characterized in that: The recording and display mechanism includes a paperless recorder.

8. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 7, characterized in that: The capacity of the voltage transmitter and / or the number of detection channels of the paperless recorder can be adjusted.

9. The portable insulation device for detecting leakage in a DC110V main line of a passenger train according to claim 1, characterized in that: The portable insulation device transmits the alarm information to the network terminal of the background monitoring system through the gateway.

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