A track circuit device alarm circuit troubleshooting method

Abstract

A track circuit device alarm circuit troubleshooting method belongs to the technical field of railway signal and comprises the following steps: step one, testing the external power supply circuit of the alarm relay: the track circuit alarm relay drive line and the drive return line are introduced into the positive and negative poles of the 24V DC power supply of the track circuit cabinet; step two, testing the internal drive circuit of the alarm relay: the light coupling drive circuit part of the alarm circuit is short-circuited by using the short-circuit method; step three, testing the light coupling drive circuit of the alarm relay: the negative pole of the 24V DC power supply of the track circuit cabinet is respectively connected to each light coupling node of the track circuit alarm light coupling drive circuit by using the short-circuit method. The present application can quickly and accurately locate the track circuit alarm circuit fault, improve the work efficiency and ensure the normal operation of the station equipment.

Description

Technical Field

[0001] This invention belongs to the field of railway signaling technology, and in particular relates to a method for troubleshooting alarm circuit faults in track circuit equipment. Background Technology

[0002] Track circuit equipment is used to indicate the occupancy or vacancy status of the track. The normal operation of the track circuit equipment is a crucial prerequisite for its proper functioning and for railway transportation safety. The track circuit alarm circuit design used in the field enables timely alarms in case of track circuit equipment failure. However, in actual use, malfunctions in the track circuit alarm circuit itself can lead to false alarms. Currently, when such faults occur, voltage testing is typically used to test the voltage at each node of the track circuit alarm circuit channel, such as... Figure 1 As shown, due to the large number of alarm nodes involved in the track circuit alarm circuit channels of each station, inconsistent optocoupler characteristic parameters, and varying cable wiring lengths, there are problems such as the inability to accurately locate the fault location and the long troubleshooting time. Summary of the Invention

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a method for troubleshooting alarm circuits of track circuit equipment. By confirming the external power supply circuit, the internal drive circuit of the alarm relay, and the optocoupler drive circuit of the alarm relay one by one, the accurate location of the fault point of the track circuit alarm circuit can be determined. This method can quickly and accurately locate the fault of the track circuit alarm circuit, improve work efficiency, and ensure the normal operation of station equipment.

[0004] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0005] A method for troubleshooting alarm circuit faults in track circuit equipment includes the following steps: one end of the alarm relay is connected to the track circuit cabinet, and the other end is connected to the +24V power supply for the alarm circuit.

[0006] Step 1: Test the external power supply circuit of the alarm relay: Connect the drive line and drive return line of the track circuit alarm relay to the 24V DC power supply of the track circuit cabinet, and observe the status of the track circuit alarm relay.

[0007] Step 2: Test the internal drive circuit of the alarm relay attenuation: Use the short-circuit method to short-circuit and conduct the optocoupler drive circuit in the alarm circuit, and observe the status of the track circuit alarm relay.

[0008] Step 3: Test the alarm relay optocoupler drive circuit: Using the short-circuit method, connect the negative 24V DC power supply of the track circuit cabinet to each optocoupler node of the track circuit alarm optocoupler drive circuit, and observe the status of the track circuit alarm relay.

[0009] Furthermore, in step one, the method of introducing DC power is not limited to introducing it through terminal wiring shifting or cross-line shorting.

[0010] Furthermore, in step one, if the track circuit alarm relay drops, it is determined that there is a miswiring, open wire, or relay fault in the external power supply circuit of the track circuit alarm relay, and the fault is dealt with; if the track circuit alarm relay picks up, it is determined that the external power supply circuit of the track circuit alarm relay is normal.

[0011] Furthermore, in step two, if the track circuit alarm relay drops, it is determined that there is a fault in the internal drive circuit of the track circuit alarm relay attenuation, and the faulty attenuator is replaced; if the track circuit alarm relay picks up, it is determined that the internal drive circuit of the track circuit alarm relay attenuation is working normally.

[0012] Furthermore, in step three, if the track circuit alarm relay is activated, it is determined that the channel before the tested optocoupler node is working normally; if the track circuit alarm relay is deactivated, it is determined that there is a fault in the tested optocoupler node or the optocoupler drive circuit before it.

[0013] The beneficial effects of this invention are as follows: By systematically verifying the external power supply circuit, the internal drive circuit, and the optocoupler drive circuit of the alarm relay, the accurate location of the fault point in the track circuit alarm circuit can be determined. Through the functional characteristics of the track circuit alarm circuit, this invention can quickly locate the fault point when a track circuit alarm occurs at a station. It is simple to operate, accurate in location, flexible, and easy to use, improving operational efficiency and avoiding the problems of long processing time and inaccurate location caused by the previous voltage testing method for fault location. Attached Figure Description

[0014] Figure 1 A schematic diagram of the voltage testing method used for troubleshooting existing track circuit alarm circuits;

[0015] Figure 2 This is a flowchart of the method for troubleshooting track circuit alarm circuit faults according to the present invention;

[0016] Figure 3 This is a schematic diagram illustrating the troubleshooting of the track circuit alarm circuit according to an embodiment of the present invention. Detailed Implementation

[0017] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 2 , 3As shown, this invention provides a method for troubleshooting alarm circuits in track circuit equipment, comprising: sequentially testing and inspecting the three functional circuits of the track circuit alarm circuit to ultimately determine the specific location of the fault. The testing and inspection of the three functional circuits includes testing and inspecting the external power supply circuit of the alarm relay, testing and inspecting the internal drive circuit of the alarm relay, and testing and inspecting the optocoupler drive circuit of the alarm relay.

[0019] One end of the alarm relay is connected to the track circuit cabinet, and the other end is connected to the +24V power supply for the alarm circuit. The testing and inspection method for the external power supply circuit of the alarm relay is as follows: Connect the drive line and drive return line of the track circuit alarm relay to the 24V DC power supply of the track circuit cabinet. This can be done via terminal block relocation or short-circuiting, and the status of the track circuit alarm relay should be observed. If the track circuit alarm relay falls, it indicates a miswiring, open wiring, or relay malfunction in the external power supply circuit, requiring troubleshooting. If the track circuit alarm relay picks up, the external power supply circuit is considered normal.

[0020] Test and inspection method for the internal drive circuit of the alarm relay attenuation: Short-circuit the optocoupler drive circuit in the alarm circuit using the short-circuit method. Observe the status of the track circuit alarm relay. If the track circuit alarm relay falls, it indicates a fault in the internal drive circuit of the track circuit alarm relay attenuation, and the faulty attenuator needs to be replaced. If the track circuit alarm relay picks up, it indicates that the internal drive circuit of the track circuit alarm relay attenuation is working normally.

[0021] Test and inspection method for alarm relay optocoupler drive circuit: Using the short-circuit method, connect the negative 24V DC power supply of the track circuit cabinet to each optocoupler node of the track circuit alarm optocoupler drive circuit, and observe the status of the track circuit alarm relay. If the track circuit alarm relay is activated, it indicates that the channel before the tested optocoupler node is working normally. If the track circuit alarm relay is deactivated, it indicates that there is a fault in the tested optocoupler node or the optocoupler drive circuit before it.

[0022] Using this method to troubleshoot track circuit alarm circuit faults can quickly and accurately locate the fault location in one go, improving work efficiency. Example

[0023] When the track circuit alarm circuit malfunctions, first check... Figure 3Test and check the external power supply circuit of the track circuit alarm relay in frame A1. While the track relay drive line is given +24V, change the track relay drive return line from the zero layer terminal 01-03-16 to the negative terminal of the 24V DC power supply of the track circuit cabinet, or short-circuit it with the negative terminal of the 24V DC power supply of the track circuit cabinet through the lead wire, and observe the status of the track circuit alarm relay.

[0024] If the track circuit alarm relay is activated, it can be determined that the external power supply circuit of the track circuit alarm relay is normal; otherwise, it can be determined that there is a miswiring, open wiring, or relay failure in the external power supply circuit of the track circuit alarm relay.

[0025] After confirming that the external power supply circuit of the track circuit alarm relay is working properly, proceed with... Figure 3 Test and check the attenuation of the internal drive circuit of the track circuit alarm relay in frame A2. Short-circuit the external port 01-03-15 of the zero layer of the cabinet to the negative 24V DC power supply of the track circuit cabinet through the external wiring, and observe the status of the track circuit alarm relay.

[0026] If the track circuit alarm relay is activated, it can be determined that the optocoupler drive circuit of the track circuit alarm relay inside the attenuator is working normally; otherwise, it can be determined that the optocoupler drive circuit of the track circuit alarm relay inside the attenuator is malfunctioning, and the attenuator needs to be replaced.

[0027] After confirming that the internal drive circuit of the track circuit alarm relay is functioning properly, proceed with... Figure 3 The optical coupler drive circuit of the alarm relay in frame A3 was tested and inspected. Using the short-circuit method, the negative DC power supply of the track circuit cabinet was connected to the external port 01-03-14 on the zero layer of the cabinet.

[0028] If the track circuit alarm relay drops, it indicates that the optocoupler corresponding to the first transmitter and receiver is malfunctioning. Further on-site inspection of the transmitter, receiver, attenuator, and related wiring in that section is required. If the track circuit alarm relay picks up, it indicates that the optocoupler driving the first transmitter and receiver is normal.

[0029] Connect the negative 24V DC power supply of the track circuit cabinet to the external port 02-03-14 on the zero layer of the second section. If the track circuit alarm relay clicks up, it is determined that the optocoupler corresponding to the second transmitter and receiver is working normally. If the track circuit alarm relay drops, it is determined that the optocoupler corresponding to the second transmitter and receiver is malfunctioning. Further on-site inspection of the transmitter, receiver, attenuator and related wiring in this section is required.

[0030] Following the above method, each node of the optocoupler is tested and troubleshooted sequentially on-site. When a certain optocoupler node is tested, the track circuit alarm relay drops, and the transmitter, receiver, attenuator, and related wiring in the corresponding section of the optocoupler are further checked on-site to finally confirm the specific fault point. When using the method of this invention for fault diagnosis, the fault location can be determined in as little as five minutes, greatly improving work efficiency.

[0031] The method for troubleshooting track circuit alarm circuits of the present invention utilizes a short-circuit method to troubleshoot the three functional parts of the track circuit alarm circuit. This method is simple to operate and provides rapid and accurate fault location. Using this troubleshooting method, track circuit alarm fault locations can be identified quickly and accurately in a single operation.

[0032] Comparative Example

[0033] On-site fault location and handling of track circuit alarm circuits uses voltage testing method, such as... Figure 1 As shown. By testing the voltage of each optocoupler node in the alarm channel, the fault location is identified based on the principle of a fixed voltage drop after the optocoupler path. However, this method is often unable to accurately and quickly locate the fault due to various uncertainties, such as different alarm circuit configurations at different stations, different cable lengths, and different optocoupler parameters within the equipment. Troubleshooting using this method requires at least half an hour.

[0034] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modifications, alterations, substitutions, and variations made by those skilled in the art to the above embodiments are within the scope of the present invention.

Claims

1. A method for troubleshooting alarm circuit faults in track circuit equipment, characterized in that, The steps include: connecting one end of the alarm relay to the track circuit cabinet and the other end to the +24V power supply for the alarm circuit; Step 1: Test the external power supply circuit of the alarm relay: Connect the drive line and drive return line of the track circuit alarm relay to the 24V DC power supply of the track circuit cabinet, and observe the status of the track circuit alarm relay. Step 2: Test the internal drive circuit of the alarm relay attenuation: Use the short-circuit method to short-circuit and conduct the optocoupler drive circuit in the alarm circuit, and observe the status of the track circuit alarm relay. Step 3: Test the alarm relay optocoupler drive circuit: Using the short-circuit method, connect the negative 24V DC power supply of the track circuit cabinet to each optocoupler node of the track circuit alarm optocoupler drive circuit, and observe the status of the track circuit alarm relay.

2. The method for troubleshooting alarm circuits in track circuit equipment according to claim 1, characterized in that: In step one, the method of introducing DC power is not limited to introducing it through terminal wiring shifting or cross-line shorting.

3. The method for troubleshooting alarm circuits in track circuit equipment according to claim 1, characterized in that: In step one, if the track circuit alarm relay falls, it is determined that there is a miswiring, open wire, or relay fault in the external power supply circuit of the track circuit alarm relay, and the fault is handled. If the track circuit alarm relay is activated, it indicates that the external power supply circuit of the track circuit alarm relay is normal.

4. The method for troubleshooting alarm circuits in track circuit equipment according to claim 1, characterized in that: In step two, if the track circuit alarm relay drops, it is determined that there is a fault in the internal drive circuit of the track circuit alarm relay attenuation, and the faulty attenuator is replaced; if the track circuit alarm relay picks up, it is determined that the internal drive circuit of the track circuit alarm relay attenuation is working normally.

5. The method for troubleshooting alarm circuits in track circuit equipment according to claim 1, characterized in that: In step three, if the track circuit alarm relay is activated, it is determined that the channel before the tested optocoupler node is working normally. If the track circuit alarm relay drops, it indicates that there is a fault in the tested optocoupler node or the optocoupler drive circuit before it.

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