Direct current lightning arrester assembly capable of monitoring and transmitting discharge action records

Abstract

The utility model relates to the technical field of lightning protection of rail transit vehicles, in particular to a direct-current lightning arrester assembly capable of monitoring and transmitting discharge action records, which comprises a mounting bottom plate, the mounting bottom plate is fixed at a roof, a direct-current lightning arrester is mounted on one side of the top surface of the mounting bottom plate, and the direct-current lightning arrester is mounted on the other side of the top surface of the mounting bottom plate. A monitoring device is arranged on the top face of the installation bottom plate and located on one side of the direct-current lightning arrester, overvoltage protection can be carried out on the railway vehicle through the arranged direct-current lightning arrester, when the direct-current lightning arrester is triggered, the arranged monitoring device can receive a hit signal of the direct-current lightning arrester, and then the direct-current lightning arrester is triggered. An output relay in the monitoring management device acts, so that a vehicle TCMS system identifies and records the number of hit actions and the hit action time of the lightning arrester by receiving a closed level signal output by the relay in the monitoring management device; a data administrator can inquire the number and moment of the striking action of the lightning arrester through a computer in a passenger room without climbing on the roof, and the operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit vehicle lightning protection, in particular to a DC lightning arrester assembly capable of monitoring and transmitting discharge action records. Background Art

[0002] In order to prevent lightning overvoltage and operational overvoltage from damaging vehicles and electrical equipment, lightning arresters are generally installed near the pantograph on the roof for overvoltage protection.

[0003] The arrester uses DC metal oxide resistors as the main electrical components, which have excellent volt-ampere characteristics. They present high resistance under normal operating voltage and only a small leakage current flows through them. When lightning and operating overvoltage occur in the system, they present low resistance, limiting the residual voltage of the arrester to below the allowable value, thus preventing the pantograph and vehicle equipment from being damaged by overvoltage, thereby providing reliable protection for vehicle equipment.

[0004] Most of the existing DC lightning arresters for protecting rail transit vehicles only have the function of lightning protection for rail transit vehicles, and the relevant personnel are often unable to understand the time and number of times the DC lightning arrester is struck, and are unable to count the frequency of overvoltage in the traction system based on the time and number of strikes, and then make corresponding improvements and protection for the rail transit traction system. Therefore, there are still certain shortcomings.

[0005] In summary, it is necessary to invent a DC lightning arrester assembly that can monitor and transmit discharge action records. Utility Model Content

[0006] The purpose of the utility model is to monitor the number of discharges and leakage current of the arrester in real time by installing a monitoring device near the arrester, install an arrester monitoring and management device in the electrical cabinet in the passenger compartment of the vehicle, and connect the arrester monitoring device with the monitoring and management device through optical fiber to achieve electro-optical isolation, so as to avoid the high voltage on the roof from being introduced into the passenger compartment. Vehicle maintenance personnel can conveniently observe the real-time discharge action data of the arrester in the passenger compartment, understand the operating status of the arrester and further count the frequency of overvoltage in the traction system, so as to provide a scientific basis for the improvement of the traction system. Therefore, the present application provides a DC arrester assembly that can monitor and transmit discharge action records to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a DC lightning arrester assembly capable of monitoring and transmitting discharge action records, comprising a mounting base plate, the mounting base plate being fixed to the roof of a vehicle, a DC lightning arrester being mounted on one side of the top surface of the mounting base plate, a monitoring device being arranged on the top surface of the mounting base plate and located on one side of the DC lightning arrester, the DC lightning arrester and the monitoring device being connected via a connecting row, and a data transmission end of the monitoring device being connected to a monitoring management device (installed in an electrical cabinet in the passenger compartment of the vehicle) via an optical fiber cable.

[0008] Preferably, a protective cover is provided on the top surface of the mounting base plate and located outside the monitoring device, and the bottom end of the protective cover is fixed to the top surface of the mounting base plate.

[0009] Preferably, fixing frames are fixed on both sides of the inner wall of the protective cover and at the location where the monitoring device is placed, and the bottom end of the monitoring device is fixed to the outer wall of the fixing frame.

[0010] Preferably, the monitoring device comprises a sampling coil, and the monitoring device is connected to the sampling end of the sampling coil by a copper braided belt at the connection end with the connection bar, and the end of the copper braided belt away from the connection bar is grounded.

[0011] Preferably, the output end of the sampling coil is connected to a polarity converter, the sampling coil is also connected to a protector, the positive end of the polarity converter is connected to an absorber, and the output end of the absorber is connected to a voltage regulator and a trigger.

[0012] Preferably, the output end of the trigger is connected to a current limiter, the output end of the current limiter is connected to a fiber optic transmitter, the output end of the voltage regulator is connected to the fourth interface of the polarity converter, and the output end of the voltage regulator and the input end between the absorber are connected to an energy storage device.

[0013] Preferably, a bellows joint is fixed at the outer end of the monitoring device and at a position corresponding to the optical fiber transmitter, and a bellows joint conduit is connected to the end of the bellows joint away from the monitoring device, and the optical fiber cable passes through the bellows joint and the bellows joint conduit to be connected to the optical fiber transmitter of the monitoring device.

[0014] Preferably, the monitoring and management device includes a fiber optic receiving head, the end of the fiber optic cable away from the monitoring device is connected to the fiber optic receiving head, the output end of the fiber optic receiving head is connected to an optical amplifier, and the output end of the optical amplifier is connected to a single voltage regulator driver.

[0015] Preferably, the output end of the single voltage-stabilized drive is connected to an output relay, and a power supply module for power supply is also provided in the monitoring and management device. A relay output interface and a power supply interface are provided on the side end of the outer wall of the monitoring and management device and at positions corresponding to the output relay and the power supply module.

[0016] The beneficial effects of the utility model are:

[0017] In the utility model, the DC lightning arrester can be used to protect rail transit vehicles from electric shock. When the DC lightning arrester is triggered, the monitoring device will receive the strike signal of the DC lightning arrester and transmit it to the monitoring and management device to activate the output relay in the monitoring and management device, so that the vehicle TCMS system can identify and record the number of strikes and the strike time of the lightning arrester by receiving the closed level signal output by the relay in the monitoring and management device, which is convenient for data statistics and further analysis.

[0018] In the utility model, a copper braided belt with a resistance less than milliohms is used inside the monitoring device to connect to the side contact of the DC lightning arrester, which will not raise the protective residual voltage value of the DC lightning arrester, has high sensitivity, is accurate and reliable, and there is no direct electrical connection between the circuit of the DC lightning arrester and the measuring circuit of the monitoring and management device, thereby improving safety and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model in a top view;

[0020] Figure 2 It is a partial structural schematic diagram of the DC lightning arrester and the monitoring device in the main viewing direction of the utility model;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the DC lightning arrester and the monitoring device in the utility model in the rear view direction;

[0022] Figure 4 Schematic diagram of the circuit structure of the monitoring device and monitoring management device 700 in the utility model;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the monitoring and management device 700 in the present invention when viewed from above.

[0024] In the figure: 100, DC lightning arrester; 200, mounting base plate; 300, connecting bar; 400, protective cover; 500, monitoring device; 510, bellows joint; 520, bellows joint conduit; 600, fixing frame; 700, monitoring management device 700; 710, relay output interface; 720, power supply interface. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] See attached Figure 1-5The utility model provides a DC lightning arrester assembly capable of monitoring and transmitting discharge action records, including a mounting base plate 200, the mounting base plate 200 is fixed on the roof, a DC lightning arrester 100 is mounted on one side of the top surface of the mounting base plate 200, a monitoring device 500 is arranged on the top surface of the mounting base plate 200 and located on one side of the DC lightning arrester 100, the DC lightning arrester 100 and the monitoring device 500 are connected via a connecting bar 300, specifically, the monitoring device 500 is arranged via M10 The signal input terminal is connected to the connection row 300, and a protective cover 400 is arranged on the top surface of the mounting base plate 200 and outside the monitoring device 500. The bottom end of the protective cover 400 is fixed to the top surface of the mounting base plate 200. The protective cover 400 is arranged to protect the monitoring device 500. A fixing frame 600 is fixed on both sides of the inner wall of the protective cover 400 and at the place where the monitoring device 500 is placed. The bottom end of the monitoring device 500 is fixed to the outer wall of the fixing frame 600, and the fixing frame 600 is arranged to fix the monitoring device 500 in the protective cover 400.

[0027] The monitoring device 500 includes a sampling coil. The monitoring device 500 is connected to the sampling end of the sampling coil by a copper braid at the connection end with the connection bar 300. The end of the copper braid away from the connection bar 300 is grounded. The output end of the sampling coil is connected to a polarity converter. The sampling coil is also connected to a protector. The positive end of the polarity converter is connected to an absorber. The output end of the absorber is connected to a voltage regulator and a trigger. The output end of the trigger is connected to a current limiter. The output end of the current limiter is connected to an optical fiber transmitter. The output end of the voltage regulator is connected to the fourth interface of the polarity converter. The input end between the output end of the voltage regulator and the absorber is connected to an energy storage device. Specifically, when the system is normal, the current flowing through the copper braid in the monitoring device 500 The current is the leakage current of the lightning arrester itself, which is only at the µA level and is not enough to stimulate the sampling coil to generate a sampling voltage. The monitoring device 500 will not emit a light signal, the subsequent circuit has no voltage output, the light emitting tube has no infrared light output, the monitoring management device 700 has no response, and the output relay remains normally open. When the lightning arrester is subjected to vehicle operation overvoltage or external lightning overvoltage, the lightning arrester protection circuit will generate a shock wave of tens to thousands of amperes. The shock wave is sensed by the sampling coil and input into the polarity conversion circuit to charge the energy storage device. When the voltage rises to the threshold of the voltage regulator, the excess energy is released through the absorber, limiting the voltage to within a few volts, breaking down the trigger, i.e., the Zener diode, and driving the optical fiber emitter to emit light through the current limiter;

[0028] A corrugated pipe joint 510 is fixed at the outer end of the monitoring device 500 and at a position corresponding to the optical fiber transmitter. The end of the corrugated pipe joint 510 away from the monitoring device 500 is connected to a corrugated pipe joint conduit 520. The optical fiber cable passes through the corrugated pipe joint 510 and the corrugated pipe joint conduit 520 and is connected to the optical fiber transmitter of the monitoring device 500. The corrugated pipe joint 510 and the corrugated pipe joint conduit 520 are provided to protect the connection end between the optical fiber cable and the monitoring device 500.

[0029] The data transmission end of the monitoring device 500 is connected to the monitoring management device 700 through an optical fiber cable. The monitoring management device 700 includes an optical fiber receiving head. The end of the optical fiber cable away from the monitoring device 500 is connected to the optical fiber receiving head. The output end of the optical fiber receiving head is connected to an optical amplifier. The output end of the optical amplifier is connected to a single voltage-stabilized driver. The output end of the single voltage-stabilized driver is connected to an output relay. A power supply module for power supply is also provided in the monitoring management device 700. A relay output interface 710 and a power supply interface 720 are provided at the outer wall side end of the monitoring management device 700 and at positions corresponding to the output relay and the power supply module. Specifically, the emitted laser is sent to the monitoring management device 700 through the optical fiber cable, and is received by the optical fiber receiving head and sent to the optical amplifier for amplification processing, outputting a DC level, starting the monostable drive output, and driving the normally open relay to close with a fixed time voltage. The dry contact is closed once to complete a complete discharge process. The vehicle TCMS system identifies and records the number of times and the time when the lightning arrester is struck by receiving the closed level signal output by the relay of the monitoring management device 700.

[0030] The use process of the utility model is as follows: first, personnel can install the mounting base plate 200 on the roof of the rail vehicle, and fix the DC lightning arrester 100 and the protective cover 400 on the mounting base plate 200 by tightening bolts and nuts, and fix the monitoring device 500 on the fixing frame 600 by fasteners, then connect the connecting row 300 and the side contact point of the lightning arrester with the M10 signal input terminal of the monitoring device 500, and directly connect the signal input terminal with the housing ground terminal through a copper braided belt inside the monitoring device 500, and then connect the optical fiber transmitter head with the optical fiber receiver head through an optical fiber cable;

[0031] In actual use, when the system is normal, the current flowing through the copper braided belt in the monitoring device 500 is the leakage current of the lightning arrester itself, which is only at the µA level and is not enough to stimulate the sampling coil to generate a sampling voltage. The monitoring device 500 will not emit a light signal, the subsequent circuit has no voltage output, the light emitting tube has no infrared light output, the monitoring management device 700 has no response, and the output relay remains normally open. When the lightning arrester is subjected to vehicle operation overvoltage or external lightning overvoltage, the lightning arrester protection circuit will generate tens of amperes to thousands of amperes of shock waves, which are sensed by the sampling coil and input to the extreme The conversion circuit charges the energy storage device. When the voltage rises to the threshold of the voltage regulator, the excess energy is released through the absorber, and the voltage is limited to a few volts. The trigger, i.e., the Zener diode, is broken down, and the optical fiber transmitter is driven to emit laser through the current limiter. The emitted laser is sent to the monitoring and management device 700 through the optical fiber cable, and is received by the optical fiber receiving head and sent to the optical amplifier for amplification processing, and a DC level is output to start the monostable drive output. The fixed time voltage drives the normally open relay to attract, and the dry contact is closed once, completing a complete discharge process. The vehicle TCMS system identifies and records the number of times and the time when the lightning arrester is struck by receiving the closed level signal output by the relay in the monitoring and management device 700.

[0032] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A DC lightning arrester assembly capable of monitoring and transmitting discharge action records, comprising a mounting base plate (200), wherein the mounting base plate (200) is fixed to a vehicle roof, and a DC lightning arrester (100) is mounted on one side of a top surface of the mounting base plate (200), characterized in that: A monitoring device (500) is provided on the top surface of the installation base plate (200) and located on one side of the DC lightning arrester (100); the DC lightning arrester (100) and the monitoring device (500) are connected via a connection bar (300); and a data transmission end of the monitoring device (500) is connected to a monitoring management device (700) via an optical fiber cable.

2. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 1 is characterized in that: A protective cover (400) is arranged on the top surface of the installation base plate (200) and outside the monitoring device (500), and the bottom end of the protective cover (400) is fixed to the top surface of the installation base plate (200).

3. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 2 is characterized in that: A fixing frame (600) is fixed on both sides of the inner wall of the protective cover (400) and at the location where the monitoring device (500) is placed, and the bottom end of the monitoring device (500) is fixed to the outer wall of the fixing frame (600).

4. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 1 is characterized in that: The monitoring device (500) comprises a sampling coil. The monitoring device (500) is connected to the sampling end of the sampling coil by a copper braided belt at the connection end with the connection bar (300). The end of the copper braided belt away from the connection bar (300) is grounded.

5. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 4 is characterized in that: The output end of the sampling coil is connected to a polarity converter, the sampling coil is also connected to a protector, the positive end of the polarity converter is connected to an absorber, and the output end of the absorber is connected to a voltage stabilizer and a trigger.

6. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 5, characterized in that: The output end of the trigger is connected to a current limiter, the output end of the current limiter is connected to a fiber optic transmitter, the output end of the voltage regulator is connected to the fourth interface of the polarity converter, and the output end of the voltage regulator and the input end between the absorber are connected to an energy storage device.

7. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 6, characterized in that: A corrugated pipe joint (510) is fixed at the outer end of the monitoring device (500) and at a position corresponding to the optical fiber transmitter. The end of the corrugated pipe joint (510) away from the monitoring device (500) is connected to a corrugated pipe joint conduit (520). The optical fiber cable passes through the corrugated pipe joint (510) and the corrugated pipe joint conduit (520) and is connected to the optical fiber transmitter of the monitoring device (500).

8. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 1, characterized in that: The monitoring management device (700) comprises an optical fiber receiving head, one end of the optical fiber cable away from the monitoring device (500) is connected to the optical fiber receiving head, the output end of the optical fiber receiving head is connected to an optical amplifier, and the output end of the optical amplifier is connected to a single voltage regulator driver.

9. The DC lightning arrester assembly capable of monitoring and transmitting discharge action records according to claim 8, characterized in that: The output end of the single voltage-stabilized drive is connected to an output relay, and a power supply module for supplying power is also provided in the monitoring and management device (700). A relay output interface (710) and a power supply interface (720) are provided at the side end of the outer wall of the monitoring and management device (700) and at positions corresponding to the output relay and the power supply module.

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