CN101934746A - Automatic phase separation device for electric locomotive - Google Patents

Abstract

The invention relates to an automatic phase-splitting device for an electric locomotive. The device includes a detection and identification system, a control system and an execution system connected with catenary wires. Two pairs of wheel sensors at a fixed distance and a pair of wheel sensors set at the midpoint of the neutral zone, each pair of wheel sensors are respectively located on both sides of the track, each wheel sensor output is connected to the control system, and each wheel sensor has two Contact; the area between the front pair of wheel sensors and the midpoint of the neutral zone is a detection area, and the area between the rear pair of wheel sensors and the midpoint of the neutral zone is another detection area. The invention adopts the wheel sensor with double contacts, so that the moving direction of the locomotive can be quickly judged; each wheel sensor is equipped with a spare, which provides the reliability of the whole system.

Description

Automatic phase separation device for electric locomotive

technical field

The invention relates to an automatic phase separation device for a two-way running electric locomotive.

Background technique

At present, the traction power supply of electrified railways in my country adopts single-phase power frequency AC system. When the electric locomotive is running, it obtains single-phase AC power from the power grid erected next to the railway to provide power. There are different phase sequences in the power supply arms of the traction network. A certain distance, such as about 20-30 kilometers, set a phase-splitting neutral zone. When the catenary on both sides is powered by different phases, the neutral zone should ensure that the train passes safely without short-circuit accidents. Therefore, when the electric locomotive passes the phase-splitting point, the main circuit breaker must be disconnected to avoid excessive phase-splitting. The shock caused by the sudden change of the power supply phase. The operation process of the driver when the locomotive passes the phase split is as follows: when the locomotive is far away from the phase split point, the locomotive runs normally, and the gear position (corresponding to a certain locomotive current) handle is in the normal position; when it is close to the phase split point, the driver needs to degrade the position , to ensure that before the locomotive reaches the power-off mark, the level can be reduced to zero and the main circuit breaker is turned off, and then the locomotive passes the phase-separation point without taking current; after passing the phase-separation point, it is closed at the power-on mark The main circuit breaker should be upgraded after the status of the locomotive is restored. When the electric locomotive is over-phased, most of them use manual operation by the driver. During the operation, the driver has to observe the ground marks at any time and complete a series of operation actions in a short time. If the driver does not operate properly, the locomotive will be electrified and break into phase separation, and the phase separation insulator will be burned, causing an accident.

Chinese Patent No. ZL200620078361.9 discloses an automatic phase separation device for electric locomotives, which includes a control system, a detection and identification system, and an execution system. In the machine room; the control system and the execution system are set in the ground machine room, and connected to the catenary wire through the feeder; the detection and identification system and the execution system are respectively connected to the control system through cables. This technology can reduce the labor intensity of the driver and ensure that the full load of the locomotive passes through the catenary phase without operation. It can not only solve the problem of difficult operation for the driver under the high-speed condition of the train, but also improve the transportation capacity of the throat section.

The disadvantage of the above scheme is that since the wheel sensors of the detection and recognition system cannot directly detect the direction information of the locomotive, and there is a certain distance between the wheel sensors, it will take a long time to judge the direction of the locomotive if the information of the wheel sensors is integrated, and it cannot be carried out. Immediate direction judgment; and because the system is very dependent on the detection information of the wheel sensor, once the wheel sensor fails, the control system will not be able to correctly judge and perform effective control.

Contents of the invention

The purpose of the present invention is to provide an automatic phase separation device for an electric locomotive, which is used to expand the performance of the detection and identification system and improve the reliability of the entire system.

In order to achieve the above object, the solution adopted by the present invention is: an automatic phase separation device for an electric locomotive, the device includes a detection and identification system, a control system and an execution system connected with the catenary wire, and the detection and identification system includes symmetrically arranged on the railway Two pairs of wheel sensors (J1, J1', J3, J3') with a set distance in front of the neutral zone of the line and a pair of wheel sensors (J2, J2') set at the midpoint of the neutral zone, each pair of wheels The sensors are located on both sides of the track, and the output of each wheel sensor is connected to the control system. Each wheel sensor has two contacts; the area between the previous pair of wheel sensors (J1, J1') and the midpoint of the neutral zone is one detection zone, and the area between the latter pair of wheel sensors (J3, J3') and the midpoint of the neutral zone is another detection zone.

The invention adopts the wheel sensor with double contacts, so that the moving direction of the locomotive can be quickly judged; each wheel sensor is equipped with a spare, thereby improving the reliability of the whole system.

The detection and recognition system adopts the circuit mode of axle counting plus direction. The execution system is composed of at least one automatic over-phase switching circuit unit, and each automatic over-phase switching circuit unit includes a No. 1 over-phase switch ZK1 circuit for on-off connection between the neutral zone catenary and the power catenary on one side And another No. 2 over-phase split switch ZK2 circuit for on-off connection between the catenary neutral zone and the catenary power supply on the other side, and the two over-phase split switches are connected with the control system. The two phase-splitting switching circuits are connected to the neutral zone catenary and the corresponding phase power catenary on both sides through each isolating contact of an electric isolating switch GK, and the electric isolating switch GK is connected to the control system.

The position detection of the locomotive adopts the axle counting signal method, and the axle counting signal adopts the deflection principle of the magnetic force line, and the purpose of axle counting is achieved by changing the magnetic force line through the wheels. When the locomotive passes the wheel sensor installed on the side of the track, it will cause a change in the magnetic field. This magnetic field change signal is transmitted to the indoor main cabinet through the outdoor signal cable. The indoor main cabinet processes the magnetic field change signal and then outputs it as a contact through a safety relay. The "track occupancy and direction" signal is used to determine the location information and driving direction of the locomotive.

Description of drawings

Fig. 1 is a structural schematic diagram of an automatic phase separation device for an electric locomotive according to the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The electric locomotive automatic phase separation device as shown in Figure 1 includes a detection and identification system arranged on the side of the railway line, a control system and an execution system connected to the catenary wire, and the control system includes an input connected to the signal of the detection and identification system terminal, a comparison part that compares the signals, and an output terminal that outputs a control signal to the execution system according to the result of the comparison part. The execution system is composed of two automatic over-phase switching circuit units, and each automatic over-phase switching circuit unit includes a No. 1 over-phase switching circuit for on-off connection between the neutral zone catenary and the power catenary on one side and the other The No. 2 over-phase split switch circuit is used to connect the neutral zone of the catenary network and the catenary power supply on the other side on and off, and the two over-phase split switches are connected to the control system. The two phase-splitting switching circuits of each unit are connected to the catenary in the neutral zone and the corresponding phase power catenary on both sides through each isolating contact of an electric isolating switch, and the electric isolating switch is connected to the control system. Surge arresters are respectively arranged on both sides of the over-phase switch of the two over-phase-split switch circuits of each automatic over-phase-split switch circuit unit. The detection and recognition system includes wheel sensors J1, J3 that are symmetrically arranged in the neutral zone on the side of the railway line, set distances one after the other, and wheel sensor J2 that is set at the midpoint of the neutral zone. The area between the points is a section A of the detection area, and the area between the wheel sensor J3 and the neutral point is another section B of the detection area. Each wheel sensor has spares, namely J1', J2', J3'. The over-phase split switch is a vacuum load switch, and the isolating switch is a three-pole linkage electric operation isolating switch.

The working principle of the present invention is as follows:

As shown in Figure 1, the two ends of the neutral zone are connected to the catenary through insulating joints JYA, JYB, and the disconnectors GK, GK1, and GK2 are initially closed. GK, ZK1, and GK1 form the A-section over-phase switching loop, and GK, ZK2, and GK2 form the B-section over-phase switching loop. Take the car on the left as an example, that is, the locomotive enters the detection zone A. Initially, ZK1 is disconnected, and the neutral section is not charged. When the locomotive enters the signal collection point J1, J1′, the wheel sensor transmits the collected information to the signal control panel through the cable, and the signal control panel sends out section A" Occupy" and "direction" signals are sent to the logic control panel, and the logic control panel sends instructions to the automatic over-phase switch control panel, and then the automatic over-phase switch control panel sends a closing command to close the ZK1 switch, and the neutral section takes the A power supply; when the locomotive When driving into the signal collection point J2, J2′, the wheel sensor transmits the collected information to the signal control panel through the cable, and the signal control panel sends the section B "occupancy" and "direction" signals to the logic control panel, and the logic control panel Send an instruction to the control panel of the automatic over-phase separation switch, and then send an instruction to the control panel of the automatic over-phase separation switch to disconnect ZK1, close ZK2, and take the B power supply at the neutral section. The collected information is transmitted to the signal control panel through the cable, and the signal control panel sends a section B "idle" signal to the logic control panel, and the logic control panel sends an instruction to the automatic over-phase switch control panel, and the automatic over-phase switch control panel then Send out the opening command to disconnect ZK2, complete an automatic phase separation, the system restores to the initial state, and waits for the arrival of the next train. The action process of the car coming from the right side is similar to the above-mentioned car coming from the left side.

Claims (4)

1. An automatic over-phase separation device for an electric locomotive, the device includes a detection and identification system, a control system and an execution system connected with catenary wires, it is characterized in that, the detection and identification system includes symmetrically arranged in front of the neutral zone of the railway line Two pairs of wheel sensors (J1, J1', J3, J3') with a set distance and a pair of wheel sensors (J2, J2') set at the midpoint of the neutral zone, each pair of wheel sensors are located on both sides of the track , the output of each wheel sensor is connected to the control system, and each wheel sensor has two contacts; the area between the front pair of wheel sensors (J1, J1') and the midpoint of the neutral zone is a detection area, and the rear The area between a pair of wheel sensors (J3, J3') and the midpoint of the neutral zone is another detection zone. 2. The automatic phase separation device for an electric locomotive according to claim 1, wherein the detection and recognition system adopts a circuit mode of counting axles and adding directions. 3. The automatic phase splitting device for electric locomotive according to claim 1 or 2, characterized in that the execution system is composed of at least one automatic phase splitting switch circuit unit, each automatic passing phase splitting switch circuit unit includes a The No. 1 over-phase switch (ZK1) circuit for disconnecting the catenary in the neutral zone and the power catenary on one side, and the No. 2 over-phase switch (ZK1) circuit for connecting the neutral zone of the catenary and the power catenary on the other side The switch (ZK2) circuit, the two phase-splitting switches are connected with the control system. 4. The automatic phase splitting device for electric locomotive according to claim 3, characterized in that, the two phase splitting switch circuits pass through each isolation contact of an electric isolating switch (GK) and the catenary in the neutral zone and the contacts on both sides thereof. Corresponding phase power catenary connection, electric isolating switch (GK) is connected with the control system.

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