An interlock control system for the power supply between train cars of an orbital train

Abstract

The present invention discloses a control system for the interlock of workshop power supplies of rail trains. The present invention adopts the method of placing all the workshop power supply interlock relays in the ground workshop power supply box. Compared with the existing workshop power supply systems, it can reduce the number of relays and control cables on the train carriages. Since a large number of relays and cables are already installed on driverless rail trains and the space is relatively tight, it is applicable not only to ordinary trains but also to driverless rail trains. In addition, the workshop power supply uses double-end enabling. Compared with the single-end enabling method in the prior art, it can ensure that the workshop power supply can be carried out only when all the disconnectors are in the workshop power supply position, so as to avoid potential safety hazards caused by one of the disconnectors being in a non-workshop power supply position.

Description

Technical Field

[0001] The present invention relates to the technical field of train power supply, and particularly relates to a power interlock control system for the workshop of rail trains. Background Art

[0002] At present, the relays for the power interlock of rail transit vehicle workshops are arranged on the vehicles. To meet the power supply requirements, one, two or two groups of relays are set on each train on the motor car with a pantograph, such as the workshop power enable relay and the workshop power interlock relay. As a result, there are many relays on the vehicle, the control circuit is complex, the same equipment needs to be set on each train, the equipment cost is high, the equipment maintenance workload is large, the maintenance cost is high, and the failure rate is also high. If the relay control function of the on-vehicle interlock circuit is realized on the ground, the on-vehicle equipment can be reduced, the on-vehicle interlock control circuit can be simplified, and thus the on-vehicle equipment maintenance work can be reduced, and cost reduction and efficiency increase can also be achieved. Summary of the Invention

[0003] The present invention provides a power interlock control system for the workshop of rail trains to solve the problems pointed out in the background art.

[0004] A power interlock control system for the workshop of rail trains includes:

[0005] Two high-voltage electrical boxes respectively arranged on two carriages with pantographs, each of which includes a disconnector, an intermediate connector, and a workshop power connector socket connected to the intermediate connector. The disconnector has three working positions: "workshop power position", "grounding position", and "pantograph position"; and

[0006] An interlock control device arranged on the ground, including two groups of workshop power boxes. One of the workshop power boxes includes: a power supply auxiliary relay K11, a power supply auxiliary relay K21, a contactor K31, a power supply control button WPB1, and a workshop power plug that cooperates with the workshop power connector socket;

[0007] The other workshop power box includes: a power supply auxiliary relay K12, a power supply auxiliary relay K22, a contactor K32, a power supply control button WPB2, and a workshop power plug that cooperates with the workshop power connector socket;

[0008] When both disconnectors are in the "workshop power position" state, if only the workshop power plug at the end where the contactor K31 is located is connected to the workshop power connector socket, the power supply auxiliary relay K11 is energized, and its normally open contact is in the closed state. If the power supply control button WPB1 is in the closed state at this time, the power supply auxiliary relay K21 is energized, the contactor K31 is energized, and its normally open contact is in the closed state, and the workshop power supplies power to the train;

[0009] When the workshop power plug at the end where the contactor K31 is located is in the state of supplying power to the train, connect the workshop power plug at the end where the contactor K32 is located to the socket of the workshop power connection machine, then the power supply auxiliary relay K12 is energized. If the power supply control button WPB2 is in the closed state at this time, the power supply auxiliary relay K22 is energized. The normally closed contacts of the power supply auxiliary relay K22 and the power supply auxiliary relay K21 are both in the separated state. The contactor K31 loses power, the contactor K32 is not energized, and the normally open contacts of the contactor K31 and the contactor K32 are both in the separated state.

[0010] Two auxiliary contacts K of the disconnector in one of the high-voltage electrical boxes are connected in series with two auxiliary contacts K' of the disconnector in the other high-voltage electrical box through the train line.

[0011] When the workshop power plug at the end where the contactor K31 is located is connected to the workshop power connector socket, if the two disconnectors are in the "workshop power position" state and the two auxiliary contacts K and the two auxiliary contacts K' are in the closed state, the power supply auxiliary relay K11 is energized and the power supply auxiliary relay K12 is not energized; if one of the disconnectors is not in the "workshop power position" state and the two auxiliary contacts K or the two auxiliary contacts K' are not closed, both the power supply auxiliary relay K11 and the power supply auxiliary relay K12 are not energized.

[0012] When the workshop power plug at the end where the contactor K32 is located is connected to the workshop power connector socket, if the two disconnectors are in the "workshop power position" state and the two auxiliary contacts K and the two auxiliary contacts K' are closed, the power supply auxiliary relay K12 is energized and the power supply auxiliary relay K11 is not energized; if one of the disconnectors is not in the "workshop power position" state and the two auxiliary contacts K or the two auxiliary contacts K' are not closed, both the power supply auxiliary relay K12 and the power supply auxiliary relay K11 are not energized.

[0013] The auxiliary contact K of one disconnector and the auxiliary contact K' of the other disconnector are interlocked with the control circuit of the pantograph. When both disconnectors are in the "workshop power position", the two auxiliary contacts K and the two auxiliary contacts K' are both in the closed state, and the pantograph is in the lowered state.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts the method of placing all the workshop power interlock relays in the ground workshop power box. Compared with the workshop power supply system in the prior art, it can reduce the number of relays and control cables on the train carriages. Since there are already a large number of relays and cables installed on the driverless rail train and the space is relatively tight, it is applicable not only to ordinary trains but also to driverless rail trains.

[0015] In addition, the workshop power supply adopts dual - end enabling. Compared with the single - end enabling method in the prior art, it can ensure that all disconnectors are in the workshop power supply position, so as to avoid the potential safety hazards caused by the other disconnector being able to be in any position. Description of the Drawings

[0016] Figure 1 It is the circuit diagram of the interlock control of the workshop power supply of the present invention; Detailed Embodiment

[0017] The following combines the drawings to describe in detail a specific embodiment of the present invention. However, it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0018] As Figure 1 shown, an interlock control system for the workshop power supply of a rail train provided by an embodiment of the present invention includes:

[0019] Two high - voltage electrical boxes respectively arranged on two carriages with pantographs, each including a disconnector, an intermediate connector, and a workshop power supply connector socket connected to the intermediate connector. The disconnector has three working positions: "workshop power supply position", "grounding position", and "pantograph position";

[0020] An interlock control device arranged on the ground, including two groups of workshop power supply boxes. One of the workshop power supply boxes includes: a power supply auxiliary relay K11, a power supply auxiliary relay K22, a contactor K31, a power supply control button WPB1, and a workshop power supply plug that cooperates with the workshop power supply connector socket;

[0021] The other workshop power supply box includes: a power supply auxiliary relay K12, a power supply auxiliary relay K22, a contactor (K32), a power supply control button WPB2, and a workshop power supply plug that cooperates with the workshop power supply connector socket. The two workshop power supply boxes correspond to the two high - voltage electrical boxes one by one;

[0022] When both disconnectors are in the "workshop power supply position" state, if the workshop power supply plug at the end where the contactor K31 is located is connected to the workshop power supply connector socket, the power supply auxiliary relay K11 is energized, and its normally open contact is in the closed state. If the power supply control button WPB1 is in the closed state at this time, the power supply auxiliary relay K21 is energized, the contactor K31 is energized, and its normally open contact is in the closed state, and the workshop power supply supplies power to the train;

[0023] When the workshop power plug at the end where contactor K31 is located is in the state of supplying power to the train, if the workshop power plug at the end where contactor K32 is located is connected to the workshop power connector socket, then power supply auxiliary relay K12 is energized. If the power supply control button WPB2 is in the closed state at this time, then power supply auxiliary relay K22 is energized. The normally closed contacts of power supply auxiliary relay K22 and power supply auxiliary relay K21 are both in the separated state. Contactor K31 loses power, contactor K32 is not energized, and the normally open contacts of contactor K31 and contactor K32 are both in the separated state. That is, the workshop power plug at the end where contactor K31 is located stops supplying power to the train, and the workshop power plug at the end where contactor K32 is located cannot supply power to the train either;

[0024] Power supply auxiliary relay K11 and power supply auxiliary relay K12 achieve the enabling control of the workshop power supply. Power supply auxiliary relay K21 and power supply auxiliary relay K22 achieve the interlock control of the two workshop power supplies;

[0025] As Figure 1 shown, the two auxiliary contacts K of the disconnector in one high-voltage electrical cabinet are respectively connected in series with the two auxiliary contacts K' of the disconnector in the other high-voltage electrical cabinet through the train line; after the workshop power plug at the end where contactor K31 is located is inserted into the workshop power connector socket, the circuit between pin 30 and pin 1 is connected, and the circuit between pin 15 and pin 2 is connected. When both disconnectors are turned to the "workshop power position", the two linked auxiliary contacts K are closed, and the two linked auxiliary contacts K' are closed, then power supply auxiliary relay K11 can be energized. If only one disconnector is turned to the "workshop power position", then power supply auxiliary relay K11 is not energized, preventing safety accidents caused by one of the car disconnectors being in other working positions;

[0026] When the workshop power plug at the end where contactor K31 is located is connected to the workshop power connector socket, if both disconnectors are in the "workshop power position" state and the two auxiliary contacts K and the two auxiliary contacts K' are in the closed state, then power supply auxiliary relay K11 is energized and power supply auxiliary relay K12 is not energized; if one of the disconnectors is not in the "workshop power position" state and the two auxiliary contacts K or the two auxiliary contacts K' are not closed, then both power supply auxiliary relay K11 and power supply auxiliary relay K12 are not energized;

[0027] When the workshop power plug at the end where the contactor K32 is located is connected to the workshop power connector socket, if the two disconnectors are in the "workshop power position" state, the two auxiliary contacts K and the two auxiliary contacts K' are closed, then the power supply auxiliary relay K12 is energized and the power supply auxiliary relay K11 is not energized; if one of the disconnectors is not in the "workshop power position" state, or the two auxiliary contacts K or the two auxiliary contacts K' are not closed, then both the power supply auxiliary relay K12 and the power supply auxiliary relay K11 are not energized.

[0028] The auxiliary contact K of one of the disconnectors and the auxiliary contact K' of the other disconnector are interlocked with the control circuit of the pantograph. When both disconnectors are in the "workshop power position", the two auxiliary contacts K and the two auxiliary contacts K' are both in the closed state. At this time, the other auxiliary contacts of the two disconnectors cannot give the condition for enabling the pantograph to rise. In the state where the power supply auxiliary relay K11 or the power supply auxiliary relay K12 is energized, the condition for the pantograph to rise is not met and the pantograph is in the lowered state (the control circuit of the pantograph is an existing control circuit, so it is not described here).

[0029] Workshop power enable: When both disconnectors on the vehicle are turned to the "workshop power position", their auxiliary contacts K (K') are closed. Plug in the workshop power plug at either end, and the power supply auxiliary relay K11 or the power supply auxiliary relay K12 is energized. At this time, the auxiliary contacts of the disconnector lose power under the control of the pantograph control circuit to make the double pantographs lower, realizing the interlock between the workshop power and the pantograph.

[0030] Workshop power interlock: There is an electrical interlock between the ground workshop power supply circuits, and it is not allowed for the workshop power supplies at both ends of the train to supply power to the carriages at the same time, that is, it is not allowed for the power supply auxiliary relay K21 and the power supply auxiliary relay K22 to be energized simultaneously. If the power supply auxiliary relay K21 and the power supply auxiliary relay K22 are energized simultaneously, the normally closed contacts will open, and both the contactor K31 and the contactor K32 will not be energized.

[0031] Workshop power supply: To achieve workshop power supply, first turn the two disconnectors on the vehicle to the "workshop power position", and their auxiliary contacts K (K') are closed. Then plug in a workshop power plug. After confirming that the plug is properly inserted, close the power supply control button WPB1 or the power supply control button WPB2 to make the contactors K31 and K32 energized, and the normally open contacts are closed to achieve workshop power supply.

[0032] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit and basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0033] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An on-vehicle power interlock control system for rail trains, characterized in that, Including: Two high-voltage electrical boxes respectively arranged on two cars with pantographs, each including a disconnector, an intermediate connector, and a workshop power connector socket connected to the intermediate connector. The disconnector has three working positions: "workshop power position", "grounding position", and "pantograph position"; And An interlocking control device arranged on the ground, including two groups of workshop power boxes. One of the workshop power boxes includes: power supply auxiliary relay K11, power supply auxiliary relay K21, contactor K31, power supply control button WPB1, and a workshop power plug that mates with the workshop power connector socket; The other workshop power box includes: power supply auxiliary relay K12, power supply auxiliary relay K22, contactor K32, power supply control button WPB2, and a workshop power plug that mates with the workshop power connector socket; When both disconnectors are in the "workshop power position" state, if only the workshop power plug at the end where the contactor K31 is located is connected to the workshop power connector socket, the power supply auxiliary relay K11 is energized, and its normally open contact is in the closed state. If the power supply control button WPB1 is in the closed state at this time, the power supply auxiliary relay K21 is energized, the contactor K31 is energized, and its normally open contact is in the closed state, and the workshop power supplies power to the train; When the workshop power plug at the end where the contactor K31 is located is in the state of supplying power to the train, if the workshop power plug at the end where the contactor K32 is located is connected to the workshop power connector socket, the power supply auxiliary relay K12 is energized. If the power supply control button WPB2 is in the closed state at this time, the power supply auxiliary relay K22 is energized, the normally closed contacts of both the power supply auxiliary relay K22 and the power supply auxiliary relay K21 are in the separated state, the contactor K31 loses power, the contactor K32 is not energized, and the normally open contacts of both the contactor K31 and the contactor K32 are in the separated state.

2. The power interlock control system for the train cars of an orbital train according to claim 1, wherein Two auxiliary contacts K of the disconnector in one of the high-voltage electrical boxes are connected in series through the train line with two auxiliary contacts K' of the disconnector in the other high-voltage electrical box; When the workshop power plug at the end where the contactor K31 is located is connected to the workshop power connector socket, if both disconnectors are in the "workshop power position" state and both auxiliary contacts K and both auxiliary contacts K' are in the closed state, the power supply auxiliary relay K11 is energized and the power supply auxiliary relay K12 is not energized; if one of the disconnectors is not in the "workshop power position" state and either both auxiliary contacts K or both auxiliary contacts K' are not closed, neither the power supply auxiliary relay K11 nor the power supply auxiliary relay K12 is energized; When the workshop power plug at the end where the contactor K32 is located is connected to the workshop power connector socket, if the two disconnectors are in the "workshop power position" state, the two auxiliary contacts K and the two auxiliary contacts K' are closed, then the power supply auxiliary relay K12 is energized and the power supply auxiliary relay K11 is not energized; if one of the disconnectors is not in the "workshop power position" state and the two auxiliary contacts K or the two auxiliary contacts K' are not closed, then both the power supply auxiliary relay K12 and the power supply auxiliary relay K11 are not energized.

3. The power interlock control system for the train cars of a rail train according to claim 2, wherein, The auxiliary contact K of one of the disconnectors and the auxiliary contact K' of the other disconnector are interlocked with the control circuit of the pantograph. When both disconnectors are in the "workshop power position", the two auxiliary contacts K and the two auxiliary contacts K' are both in the closed state, and the pantograph is in the lowered position.

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