Monitoring and diagnosing device for centralized track circuit

Abstract

The utility model discloses a monitoring and diagnosing device for a centralized track circuit, which comprises indoor equipment and outdoor equipment, and the indoor equipment comprises an indoor monitoring module, a carrier communication extension set and a monitoring and diagnosing host; the outdoor equipment comprises an outdoor monitoring module; the indoor monitoring module is installed in a centralized track cabinet, and the communication carrier communication extension set and the monitoring and diagnosis host are both installed in a centralized 25-cycle phase-sensitive track circuit monitoring and diagnosis cabinet. The outdoor monitoring module is installed in the choke transformer box. According to the utility model, on-line monitoring of parameters of indoor and outdoor equipment is carried out, and comparison of normal parameters of the equipment and fault acquisition parameters is carried out, so that fault diagnosis of track circuit composition equipment is realized, fault judgment under field application complex scenes such as unbalanced traction current interference and insulation damage is realized, and convenience is provided for field management and maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit railway signals, in particular to a monitoring and diagnosis device for a centralized track circuit. Background Art

[0002] Track circuit is an electrical circuit composed of two steel rails as conductors and lead wires connecting power supply and receiving equipment. Track circuit is a circuit device installed on the railway line to monitor whether the railway line is idle and automatically and continuously connect the operation of trains and signal equipment to ensure driving safety. At present, the track circuit in my country's conventional railway stations adopts 25Hz series phase-sensitive track circuit.

[0003] Currently, the 25Hz phase-sensitive track circuit monitoring system within the station only collects the voltage, phase, and track relay status of the receiving end. When a fault occurs, effective fault location cannot be performed and faults can only be found through section-by-section testing, resulting in low fault handling efficiency. A systematic monitoring and diagnostic system for the entire station is still in its infancy, facing the following challenges:

[0004] (1) The short circuit and open circuit faults of the equipment cannot be located

[0005] The same track circuit fault phenomenon can be caused by a variety of reasons, such as open circuit, short circuit, etc. The monitoring system only collects the voltage and phase of the receiving relay side, and does not collect parameters of other equipment ports, spectrum analysis, or electrical characteristics of outdoor trackside equipment. Therefore, it cannot fully record the actual operating status of track circuit equipment.

[0006] (2) Unbalanced traction current interference problem

[0007] There are two main causes of traction current imbalance. One is a single-ended grounding fault in the rail, which is mostly caused by factors such as poor insulation of fasteners and ballast burying the rail bottom. The other most common type is imbalance caused by the turnout structure, which affects the use of track circuits and may even cause erroneous operation of the vehicle.

[0008] The choke transformer was equipped with an adapter, and a protective box was connected in parallel indoors to filter the 50Hz power frequency signal. However, when the imbalance exceeds 10%, even a large number of odd harmonic components in the traction current can affect the normal operation of the track circuit. The centralized signal monitoring system lacks spectrum analysis capabilities and only displays increases or decreases in amplitude, which provides insufficient information for analysis.

[0009] (2) Insulation damage problem

[0010] In order to prevent the loss of branch inspection function when the insulation is damaged, the track circuits in the station are designed with "polarity crossing". Although the crossing can ensure that the relay falls reliably when the train is occupied, in the idle state, the relay voltage of the two adjacent sections will be low after the insulation is damaged, but it cannot be guaranteed to fall reliably. When the train passes, the traction return path changes, and there is a risk of burning out the equipment.

[0011] (3) Disconnection inspection problem

[0012] In the electrified section, in order to ensure the smooth flow of the traction return current, it is necessary to connect the central connection points of the choke transformers on both sides of the insulation joint. At the same time, in order to balance the up and down traction currents, horizontal connecting lines are set at the station entrance and the section. The complete horizontal connection also needs to be grounded. In this way, in addition to the two rails, there is a third conductor from the power sending end to the power receiving end, commonly known as the "third rail" detour. When the detour impedance is insufficient and the choke transformer rail connecting line is broken, there is a problem that the relay cannot be reliably dropped. When the connecting line is broken on both sides of the power sending and receiving ends, there is even a safety risk of losing the branch inspection. Utility Model Content

[0013] 1. Technical problems to be solved

[0014] The purpose of the utility model is to solve the problem that the 25Hz phase-sensitive track circuit monitoring in the station in the prior art only collects the voltage, phase and track relay status of the receiving end, and cannot effectively locate the fault after a fault occurs. A monitoring and diagnostic device for centralized track circuits is proposed.

[0015] 2. Technical solution

[0016] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0017] A monitoring and diagnostic device for a centralized track circuit includes indoor equipment and outdoor equipment, wherein the indoor equipment includes an indoor monitoring module, a carrier communication extension, and a monitoring and diagnostic host; the outdoor equipment includes an outdoor monitoring module;

[0018] The indoor monitoring module is installed in a centralized track cabinet, and the carrier communication extension and monitoring and diagnosis host are both installed in a centralized 25-week phase-sensitive track circuit monitoring and diagnosis cabinet;

[0019] The outdoor monitoring module is installed in the choke transformer box, and is connected to the indoor environment through a railway signal cable and is connected to a carrier communication extension.

[0020] Preferably, the indoor monitoring module includes a power supply unit, a voltage acquisition unit, a current acquisition unit, and a data processing and storage unit.

[0021] Preferably, the carrier communication extension adopts a power carrier mode to transmit collected data. The carrier communication extension includes four channels, and each channel can drive 20 outdoor monitoring modules to work.

[0022] Preferably, the monitoring and diagnosis host realizes the processing of collected data, diagnosis of equipment failure, prompting of alarm information, storage and playback of data.

[0023] Preferably, the outdoor monitoring module comprises a power supply and carrier transmission channel, a current acquisition unit, and a current transformer, and is used to collect currents on the rail side and the signal side of the choke transformer and monitor the working status of the choke transformer.

[0024] Preferably, the choke transformer traction side adopts four independent current sensors for data collection, and the equipment is fixed on the rail lead wire, and a non-contact signal connection is used to ensure the safety and stability of the main equipment.

[0025] Preferably, the indoor monitoring module and the carrier communication extension are connected by CAN communication, and the carrier communication extension and the monitoring and diagnosis host are connected by CAN communication.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] (1) In the present invention, the monitoring and diagnostic equipment has both parameter monitoring and fault diagnosis functions. Its design is novel and reasonable, its structure is simple, and it can be well adapted to the use scenarios of the existing centralized 25-cycle phase-sensitive track circuit.

[0029] (2) In the present invention, by online monitoring of parameters of indoor and outdoor equipment and by comparing normal equipment parameters with fault acquisition parameters, the diagnosis of track circuit component equipment faults can be achieved, and fault judgment can be achieved in complex on-site application scenarios such as unbalanced traction current interference and insulation damage, providing convenience for on-site management and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a signal acquisition schematic diagram of a monitoring and diagnostic device for centralized track circuits proposed in the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a monitoring and diagnostic device for centralized track circuits proposed by the present utility model;

[0032] Figure 3 This is the structural diagram of the outdoor monitoring module proposed in this utility model;

[0033] Figure 4This is the structural diagram of the indoor monitoring module proposed in this utility model;

[0034] Figure 5 This is a schematic diagram of the external interface of the indoor monitoring module proposed in this utility model;

[0035] Figure 6 This is the layout diagram of the monitoring and diagnostic cabinet proposed in this utility model. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Example 1:

[0038] A monitoring and diagnostic device for a centralized track circuit includes indoor equipment and outdoor equipment, wherein the indoor equipment includes an indoor monitoring module, a carrier communication extension, and a monitoring and diagnostic host;

[0039] In this utility model, the indoor monitoring module is installed in the centralized track cabinet. The indoor monitoring module includes a power supply unit, a voltage acquisition unit, a current acquisition unit, a data processing and storage unit. The carrier communication extension and the monitoring and diagnosis host are both installed in the centralized 25-week phase-sensitive track circuit monitoring and diagnosis cabinet.

[0040] In this utility model, the carrier communication extension adopts the power carrier mode to transmit the collected data. The carrier communication extension contains four channels, each of which can drive 20 outdoor monitoring modules to work. The monitoring and diagnosis host realizes the processing of collected data, diagnosis of equipment failures, prompting of alarm information, storage and playback of data.

[0041] In the present invention, the outdoor equipment includes an outdoor monitoring module, which is installed in a choke transformer box. The outdoor monitoring module is connected to the indoor environment through a railway signal cable and is connected to a carrier communication extension.

[0042] In the utility model, the outdoor monitoring module includes a power supply and carrier transmission channel, a current acquisition unit, and a current transformer, which are used to collect currents on the rail side and signal side of the choke transformer and monitor the working status of the choke transformer. Four independent current sensors are used on the traction side of the choke transformer for current collection. The equipment is fixed on the rail lead wire and uses non-contact signal connection to ensure the safety and stability of the main equipment.

[0043] In the present invention, the indoor monitoring module and the carrier communication extension are connected by CAN communication, and the carrier communication extension and the monitoring and diagnosis host are connected by CAN communication.

[0044] In the present invention, the monitoring and diagnostic equipment has both parameter monitoring and fault diagnosis functions. Its design is novel and reasonable, its structure is simple, and it can be well adapted to the use scenarios of the existing centralized 25-week phase-sensitive track circuit.

[0045] In the utility model, by online monitoring of parameters of indoor and outdoor equipment and by comparing normal equipment parameters with fault acquisition parameters, the diagnosis of track circuit component equipment faults can be achieved, and fault judgment can be achieved in complex on-site application scenarios such as unbalanced traction current interference and insulation damage, providing convenience for on-site management and maintenance.

[0046] Example 2:

[0047] In this embodiment, Figure 1 As shown in the figure, in a centralized 25-cycle phase-sensitive track circuit system, currents are collected at 10 points and voltages at 5 points. Outdoor parameter collection is implemented by the outdoor monitoring module, including currents I6, I7, I9, and I10 on the traction side of the BEL-type choke transformer and currents I5 and I8 on the signal side. Indoor parameter collection is implemented by the indoor monitoring module, including parameters U1, I1, U2, and I2 on the indoor transmitting unit DN-F / 25 port, parameters U3, I3, U4, and I4 on the indoor receiving unit DN-R / 25 port, and track voltage U5.

[0048] In this embodiment, Figure 2 As shown, in actual application, the utility model includes indoor equipment and outdoor equipment, the indoor equipment includes an indoor monitoring module, a communication carrier extension, and a monitoring and diagnosis host. The outdoor equipment includes an outdoor monitoring module and a current transformer.

[0049] In this embodiment, the monitoring module and the current transformer are connected by a double-core shielded wire. The current transformer is fixed to the rail lead wire of the choke transformer in a self-locking manner. Each choke transformer is equipped with one outdoor monitoring module and five current transformers. The structure and size of the outdoor acquisition module are as follows: Figure 3 shown.

[0050] In this embodiment, the indoor monitoring module is installed in the centralized track cabinet and is placed in conjunction with the centralized 25-week phase-sensitive track circuit indoor transmitting unit / receiving unit. Each indoor monitoring module can collect device information from 4 units (indoor transmitting units or indoor receiving units). Voltage is collected at the side terminals of the centralized device, and current is collected using a current sensor. CAN communication is used to connect the indoor monitoring module to the carrier communication extension. The device structure and dimensions are as follows: Figure 4 As shown, the external interface diagram is as follows Figure 5 shown.

[0051] In this embodiment, Figure 6As shown, the indoor carrier communication extension, diagnostic host and display are all placed in the monitoring and diagnostic cabinet. The data collected by the indoor monitoring unit and the outdoor monitoring unit are converted and processed, and transmitted to the monitoring and diagnostic host through the CAN bus. The monitoring and diagnostic host uses the basic mathematical model of the track circuit to compare the parameters of the equipment under normal working conditions to achieve equipment fault location and fault warning.

[0052] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A monitoring and diagnostic device for a centralized track circuit, comprising indoor equipment and outdoor equipment, characterized in that: The indoor equipment includes an indoor monitoring module, a carrier communication extension and a monitoring and diagnostic host; the outdoor equipment includes an outdoor monitoring module; the indoor monitoring module is installed in a centralized track cabinet, and the carrier communication extension and the monitoring and diagnostic host are both installed in a centralized 25-week phase-sensitive track circuit monitoring and diagnostic cabinet; the outdoor monitoring module is installed in a choke transformer box, and the outdoor monitoring module is connected to the indoor area through a railway signal cable and is connected to the carrier communication extension.

2. A monitoring and diagnostic device for a centralized track circuit according to claim 1, characterized in that: The indoor monitoring module includes a power supply unit, a voltage acquisition unit, a current acquisition unit, and a data processing and storage unit.

3. A monitoring and diagnostic device for a centralized track circuit according to claim 1, characterized in that: The carrier communication extension adopts the power carrier mode to transmit the collected data. The carrier communication extension includes four channels, each of which can drive 20 outdoor monitoring modules to work.

4. A monitoring and diagnostic device for a centralized track circuit according to claim 1, characterized in that: The outdoor monitoring module comprises a power supply and carrier transmission channel, a current acquisition unit, and a current transformer, and is used to collect currents on the rail side and the signal side of the choke transformer and monitor the working status of the choke transformer.

5. The monitoring and diagnostic device for centralized track circuit according to claim 1, characterized in that: The choke transformer traction side uses four independent current sensors for current collection. The equipment is fixed on the rail lead wire and uses non-contact signal connection to ensure the safety and stability of the main equipment.

6. The monitoring and diagnostic device for centralized track circuit according to claim 1, characterized in that: The indoor monitoring module and the carrier communication extension are connected by CAN communication, and the carrier communication extension and the monitoring and diagnosis host are connected by CAN communication.

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