A method of modifying a track circuit

Abstract

This application discloses a method for modifying a track circuit. By connecting the front node of the light control relay in parallel with the node of the first filament retest relay, the actual state of the track segment is made consistent with the displayed state of the track segment in the railway dispatching system. This application overcomes the problem of discrepancies between the actual state of the track segment and the displayed state in the railway dispatching system when a communication vehicle enters the track by connecting the front node of the KDJ (light control relay) in parallel with the node of the 1DJF (first filament retest relay), thus ensuring that the actual state of the track segment matches the displayed state in the railway dispatching system.

Description

Technical Field

[0001] This invention belongs to the technical field of track circuits, and specifically relates to a method for modifying a track circuit. Background Technology

[0002] Automatic block signaling is a method of signaling that automatically changes the light display of passing signals based on train operation and the occupancy status of block sections. Drivers rely on these signal lights to guide train movement. A common type of automatic block signaling is the UM71 automatic block system. In the track circuit of the UM71 automatic block system, the lighting status of each signal is determined by multiple relays. When a train passes a node of a track-connecting relay, the track-connecting circuit connected to that node is activated, causing the corresponding signal to turn off. At this time, the railway dispatching system displays the current track section as occupied. Because there is a correlation between the signals in the coding circuit through relays, when one signal turns off, other adjacent signals will also display the corresponding light color, realizing fixed block sections divided by signals, thereby guiding the movement of other adjacent trains.

[0003] Moving block signaling eliminates the fixed block sections separated by signals. The minimum interval between trains is determined by the train's actual position and operating status on the track. Therefore, the block section continuously moves and adjusts as the train travels. This block section is only a logical interval to ensure safe train operation and has no physical correspondence with the actual track.

[0004] When modified locomotives (communication cars) and unmodified locomotives (non-communication cars) run together on the same track, in order to optimize transportation efficiency to the greatest extent and not affect the normal operation of non-communication cars, the following solution is proposed in the existing technology: by adding KDJ (light control relay) to the signal lighting circuit, the signal is controlled to turn off when a communication train is running on the line and approaches the signal, and then the light is turned on again after the train passes.

[0005] In this scheme, the downstream node of the light control relay is connected in series with the lighting circuit. When a communication vehicle passes by, to avoid the communication vehicle being affected by the signal lights, the signals within a certain range ahead of the communication vehicle need to be turned off. This is achieved by activating the KDJ (light control relay), causing the corresponding signal to turn off. However, activating the KDJ simultaneously causes the 1DJF (first filament compound relay) to fall, creating an open circuit in the encoding circuit and making the track connection circuit conductive. Consequently, the railway dispatching system displays the section as a red light strip, indicating it is occupied. However, in reality, the signals are turned off so that the communication vehicle can pass unaffected by the signals, and the section is not actually occupied, resulting in a discrepancy between the displayed and actual conditions. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a method for modifying track circuits. This application connects the front contact of the lighting relay in parallel with the node of the first filament compound relay, ensuring that the actual state of the track segment matches the displayed state in the railway dispatching system. Furthermore, by connecting the front contact of the KDJ (lighting relay) in parallel with the node of the 1DJF (first filament compound relay), this application overcomes the problem of discrepancies between the actual track condition and the displayed state in the railway dispatching system when a communication vehicle enters, thus ensuring that the actual state of the track segment matches the displayed state in the railway dispatching system.

[0007] To solve the above-mentioned technical problems, a method for modifying a track circuit is provided, characterized by being applicable to UM71 track circuits, comprising: connecting the front contact of a light-controlling relay in parallel with the node of a first filament compound relay, so that the actual state of the track segment matches the displayed state of the track segment in the railway dispatching system; wherein, a light-controlling relay is connected in the UM71 track circuit; the light-controlling relay is used to control the conduction and cutoff of the lighting circuit in the signal; the railway dispatching system is used to display the occupancy status of each track segment; the displayed state of the track segment in the railway dispatching system is affected by the first filament compound relay.

[0008] In some embodiments, connecting the front contact of the lighting control relay in parallel with the node of the first filament compound relay includes: obtaining the position of the signal; determining the type of the signal based on the position; and connecting the front contact of the lighting control relay in parallel with the node of the first filament compound relay based on the type of the signal.

[0009] In some embodiments, the type of the signal includes: an entry signal; the node of the first filament compound relay includes: an encoding node; the step of connecting the node of the light control relay and the node of the first filament compound relay in parallel according to the type of the signal includes: when the type of the signal is an entry signal, connecting the front contact of the light control relay in parallel with the encoding node of the first filament compound relay; wherein, the encoding node is in the encoding circuit of the signal.

[0010] In some embodiments, the type of the signal includes: a section signal; the node of the first filament compound relay includes: an excitation node; the step of connecting the node of the lighting control relay in parallel with the node of the first filament compound relay further includes: when the type of the signal is a section signal, connecting the front contact of the lighting control relay in parallel with the excitation node of the first filament compound relay; wherein the excitation node is in the excitation circuit of the first filament compound relay.

[0011] In some embodiments, the excitation node includes: the front contact of the first filament relay; when the signal type is a section signal, the front contact of the lighting relay is connected in parallel with the excitation node of the first filament relay, and further includes: when the signal type is a section signal, the front contact of the lighting relay is connected in parallel with the front contact of the first filament relay.

[0012] The beneficial effects of this invention are as follows: By connecting the front contact of the lighting relay in parallel with the node of the first filament compound relay, this application ensures that the actual state of the road segment matches the displayed state of the road segment in the railway dispatching system. This application overcomes the problem of discrepancies between the actual road segment situation and the displayed state in the railway dispatching system when a communication vehicle enters the system by connecting the front contact of the KDJ (lighting relay) in parallel with the node of the 1DJF (first filament compound relay), thus ensuring that the actual state of the road segment matches the displayed state in the railway dispatching system. This achieves both moving block and fixed block operation modes without altering the characteristics of the UM71 circuit itself. Furthermore, it requires minimal engineering modifications, is highly efficient, has a small impact range, and effectively improves transport capacity. Attached Figure Description

[0013] The scope of this disclosure can be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. The accompanying drawings are:

[0014] Figure 1 A flowchart illustrating a method for modifying a track circuit according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram illustrating the modification of the entry signal provided in an embodiment of this application;

[0016] Figure 3 This is a schematic diagram illustrating the modification of the section signal provided in an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0019] If the application documents contain similar descriptions such as "first, second, third", the following explanation shall be added: In the following description, the terms "first, second, third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0021] This application addresses the issue mentioned in the background art: when a KDJ (lighting relay) is connected to the downstream node of the UM71 automatic block signaling track circuit, a discrepancy arises when a communication vehicle approaches and extinguishes the lights of signals within a certain range, resulting in a discrepancy between the track status and the status displayed in the railway dispatching system. This application proposes a modification method for the track circuit, applicable to the UM71 track circuit.

[0022] This application primarily addresses the technical problems mentioned in the background by connecting the downstream node of the KDJ (light control relay) in parallel to the node of the 1DJF (first filament compound relay). In the UM71 track circuit, the status displayed in the railway dispatching system is affected by the status of the 1DJF (first filament compound relay). Without modification of the 1DJF (first filament compound relay), when the KDJ (light control relay) of a signal is activated, the 1DJF (first filament compound relay) of that signal is in the deactivated state. This causes an open circuit in the signal's encoding circuit, resulting in the track connection circuit of the section where the signal is located being conductive, causing that section to be displayed as occupied in the railway dispatching system. Therefore, the modification method in this application includes:

[0023] The front contact of the light control relay is connected in parallel with the node of the first filament compound relay so that the actual state of the road segment matches the displayed state of the road segment in the railway dispatching system.

[0024] To avoid the influence of traffic signals on communication vehicles, it is necessary to turn off the lights of traffic signals within a certain range in the direction of the communication vehicle's travel when it approaches. To turn off the lights of traffic signals in unoccupied sections, the existing technical solution involves connecting the rear terminal of a KDJ (light control relay) in series with the corresponding lighting circuit of the traffic signal. When a communication vehicle approaches, the KDJ is activated, causing an open circuit in the signal's lighting circuit, thus turning off the lights. However, by connecting the front terminal of the KDJ in parallel with the terminal of a 1DJF (first filament compound relay), the conduction state of the circuit containing the 1DJF terminal is affected not only by the 1DJF relay but also by the KDJ relay. Therefore, when the node of 1DJF (first filament compound relay) causes the circuit to be open, the front contact of KDJ (light control relay) can make the circuit closed again, so that the overall state of the circuit will not be affected by the state of KDJ (light control relay).

[0025] This invention overcomes the problem of discrepancies between the actual condition of the road segment and the status displayed in the railway dispatching system when a communication vehicle enters the system, ensuring that the actual condition of the road segment matches the displayed status in the railway dispatching system. It achieves both moving block and fixed block operation modes without altering the inherent characteristics of the UM71 circuit. Furthermore, it requires minimal engineering modifications, is highly efficient, has a small impact range, and effectively improves transport capacity.

[0026] In some embodiments, such as Figure 1 As shown, connecting the front contact of the lamp control relay in parallel with the node of the first filament compound relay includes:

[0027] Step S1: Obtain the position of the signal.

[0028] Step S2: Determine the type of the signal based on the location.

[0029] Step S3: According to the type of the signal, connect the node of the light control relay in parallel with the node of the first filament compound relay so that the lighting state of the signal matches the state of the light control relay.

[0030] Based on their location, the complexity of their lighting circuits and their interrelationships with other signals vary, thus signaling can be categorized into two types: section signals and entry signals. Section signals have relatively simple lighting circuits and straightforward interrelationships with other signals. However, entry signals have more complex lighting circuits due to the intricate relationships with their associated signals. Therefore, in this application, to reduce the workload and avoid adverse effects caused by modifications to the track circuitry, different modification methods are required for different types of signals.

[0031] The 1DJF (First Filament Compound Relay) contains multiple sets of nodes, some of which are distributed in the encoding circuit, and others in the excitation circuit of the 1DJF. For ease of description, in this application, the nodes of the 1DJF (First Filament Compound Relay) distributed in the encoding circuit are referred to as encoding nodes, and the nodes distributed in the excitation circuit of the 1DJF (First Filament Compound Relay) are referred to as excitation nodes. When the KDJ (Light Control Relay) is activated, it causes the 1DJF (First Filament Compound Relay) to fall, which in turn causes the encoding nodes of the 1DJF (First Filament Compound Relay) to lift, resulting in an open circuit in the encoding circuit, causing the encoding transmission and reception to fail, and thus enabling the track connection circuit to conduct, causing the railway dispatch system to display the section as occupied.

[0032] Therefore, in some embodiments, step S3 of this application, "connecting the node of the light control relay in parallel with the node of the first filament compound relay according to the type of the signal, so that the lighting state of the signal matches the state of the light control relay," includes:

[0033] Step S31: When the signal type is an entry signal, connect the node of the light control relay in parallel with the encoding node of the first filament compound relay.

[0034] like Figure 2As shown in the figure, FS represents the transmitting end of the UM71 encoding circuit, and the ellipsis represents other circuits unrelated to this application. The KDJ (light control relay) marking in the figure is the front contact of the KDJ (light control relay), and the 1DJF (first filament compound relay) marking is the encoding node of the 1DJF (first filament compound relay). The solid line represents the contact state when the KDJ (light control relay) is not activated, the dashed line represents the contact state after the relay is activated, and the arrow is used to indicate the direction of the relay node state change. This application connects the front contact of the KDJ (light control relay) in parallel with the encoding node of the 1DJF (first filament compound relay). When the KDJ is energized, the 1DJF is in a lowered state, while its encoding node is in an elevated state. However, the front contact of the KDJ remains in a lowered state, ensuring the encoding circuit remains conductive and can transmit codes normally. This ensures the displayed state in the railway dispatching system matches the actual track state, resolving the problem mentioned in the background technology center that the actual track state does not match the displayed state in the railway dispatching system.

[0035] Because the connection between the entry signal and other signals is complex, in order to avoid adverse effects on other signals or other places, in step S31, only the front contact of KDJ (light control relay) and the encoding node of 1DJF (first filament compound relay) can be connected in parallel. However, there are multiple encoding nodes of 1DJF (first filament compound relay) in the lighting circuit of a signal, so the workload of modification is still relatively high.

[0036] For section signals, their relationship with other signals is simple, and the lighting circuit is relatively simple.

[0037] Therefore, in some embodiments, step S3, "connecting the node of the lamp control relay in parallel with the node of the first filament compound relay," further includes:

[0038] Step S32: When the signal type is a section signal, connect the node of the lamp control relay in parallel with the excitation node of the first filament compound relay.

[0039] Because the relationship between section signals and other signals is simple, and the lighting circuit is relatively simple, in this application, for section signals, the front contact of the KDJ (light control relay) can be connected in parallel with the excitation node of the 1DJF (first filament compound relay). After connecting the front contact of the KDJ (light control relay) in parallel with the excitation node of the 1DJF (first filament compound relay), when the KDJ (light control relay) is energized, its rear node drops, causing the excitation circuit of the 1DJF (first filament compound relay) to conduct. This ensures that the circuit containing the encoding node of the 1DJF (first filament compound relay) remains in a conducting state, thus avoiding the situation where the 1DJF (first filament compound relay) drops due to the energization of the KDJ (light control relay). This ensures that when a communication vehicle approaches, while turning off the lights of the signal in front of the communication vehicle, the status displayed in the railway dispatching system matches the actual track status. Furthermore, compared to modifying the entrance signal, this also significantly reduced the workload.

[0040] In the actual track circuit, there is also a 1DJ (first filament relay). The state of this relay changes with the state of the encoding circuit, and the state of this relay also affects the state of the encoding circuit.

[0041] Therefore, in some embodiments, step S32, "when the signal is a section signal, connect the front contact of the lamp control relay in parallel with the excitation node of the first filament compound relay," includes:

[0042] Step S321: When the signal type is a section signal, connect the front contact of the light control relay in parallel with the front contact of the first filament relay.

[0043] like Figure 3As shown in the diagram, the KDJ (light control relay) marking is the front contact of the KDJ (light control relay), the 1DJ (first filament relay) marking is the excitation node of the 1DJF (first filament compound relay), and the 1DJF (first filament compound relay) marking is the 1DJF (first filament compound relay). The solid lines represent the contact state when the KDJ (light control relay) is not activated, the dashed lines represent the contact state after the relay has activated, and the arrows indicate the direction of the relay node state change. Therefore, when it is necessary to connect the excitation node of 1DJF (first filament compound relay) in parallel, the main method is to connect the front contact of KDJ (light control relay) in parallel with the front contact of 1DJ (first filament relay) to control 1DJF (first filament compound relay). This ensures that the state of 1DJF (first filament compound relay) does not change with the state of KDJ (light control relay), and that the encoding node of 1DJF (first filament compound relay) is not affected by the state change of KDJ (light control relay). This achieves the goal of turning off the signal light in front of the communication vehicle when it arrives, while also ensuring that the state displayed in the railway dispatching system matches the actual state of the track.

[0044] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0045] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0046] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for modifying a track circuit, characterized in that, Suitable for UM71 track circuits, including: The front contact of the lighting relay is connected in parallel with the node of the first filament compound relay. When the lighting relay is energized, the first filament compound relay is in the lowered state, and when the first filament compound relay is in the raised state, the front contact of the lighting relay is in the lowered state, so that the encoding circuit is always in the conducting state and can send codes normally, so that the actual state of the road segment matches the displayed state of the road segment in the railway dispatching system. The UM71 track circuit is connected to a controllable lamp relay, and the first filament duplex relay is connected in series in the encoding circuit of the UM71 track circuit. The light control relay is used to control the on and off of the lighting circuit in the signal machine; The railway dispatching system is used to display the occupancy status of each section based on the encoding sent by the encoding circuit; The display status of the railway section in the railway dispatching system is affected by the first filament compound relay.

2. The method for modifying a track circuit according to claim 1, characterized in that, The method of connecting the front contact of the lamp control relay in parallel with the node of the first filament compound relay includes: Obtain the position of the target signal; The type of the target signal is determined based on the location; Depending on the type of the target signal, the front contact of the light control relay is connected in parallel with the node of the first filament compound relay.

3. The method for modifying a track circuit according to claim 2, characterized in that, The signal type includes: an entry signal; the node of the first filament compound relay includes: an encoding node; the step of connecting the front contact of the lighting relay in parallel with the node of the first filament compound relay according to the type of the signal includes: When the signal is an entry signal, the front contact of the light control relay is connected in parallel with the encoding node of the first filament compound relay; The encoding node is located in the encoding circuit of the signal machine.

4. The method for modifying a track circuit according to claim 2, characterized in that, The type of signal includes: section signal; the node of the first filament compound relay includes: excitation node; the method of connecting the front contact of the lighting relay in parallel with the node of the first filament compound relay further includes: When the signal is a section signal, the front contact of the lamp control relay is connected in parallel with the excitation node of the first filament compound relay; The excitation node is located in the excitation circuit of the first filament compound relay.

5. The method for modifying a track circuit according to claim 4, characterized in that, The excitation node includes: the front contact of the first filament relay; when the signal type is a section signal, the front contact of the lamp control relay is connected in parallel with the excitation node of the first filament compound relay, including; When the signal is a section signal, the front contact of the light control relay is connected in parallel with the front contact of the first filament relay.

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