Protective electric control system for battery charger in iron mixing car capping device

Abstract

The utility model discloses a protection electric control system for a battery charger in a torpedo car capping device, which is characterized in that a circuit breaker, an open-phase protector, an alternating current contactor and the like are respectively arranged in charging main loops on two sides of a torpedo car; a normally-closed auxiliary contact of each open-phase protector and a normally-closed auxiliary contact of an opposite alternating-current contactor are connected in series in a control loop of a coil of the corresponding alternating-current contactor to form interlocking, so that when one side is normally charged, a charging interface of a covering operation box on the other side is not electrified, and the electric shock risk of operators is reduced; meanwhile, under the action of the open-phase protector, the control loop can be switched off when the external power supply is open-phase, open-zero, over-voltage and under-voltage, so that the charging main loop is switched off, and the risk that the battery charger is burnt down is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, specifically relating to a protective electrical control system for a battery charger in a mixed-rail vehicle cover device. Background Technology

[0002] The molten iron transport car is mainly used for transporting molten iron, and its ladle opening is usually equipped with a cover. The main function of the cover is to reduce the temperature drop of the molten iron inside the car and reduce smoke and dust emissions. The electrical control components of the cover include a battery pack, battery charger, electrical control box, DC / DC converter, etc. All of these electrical control components are installed in the electrical room of the molten iron transport car. The battery charger and battery pack are mounted on the floor of the electrical room and connected by cables. The power supply at the input end of the battery charger is generally a 380V three-phase four-wire AC power supply. To facilitate the operation of the cover, the molten iron transport car usually has cover operation boxes on both sides, with charging interfaces on the cover operation boxes. The charging interfaces on both sides are then connected to the battery charger in the electrical room of the molten iron transport car through cables. Depending on the location of the external power supply, charging can be performed on either side of the molten iron transport car. During charging, if the external power supply line experiences faults such as missing neutral or missing phase, it will often damage the battery charger. In addition, since the cover device can be operated from both sides of the control box of the mixed-rail vehicle, when charging is performed on one side, the charging interface on the other side will also be electrified because the cable on the other side is also connected to the battery charger, which poses a safety hazard. Utility Model Content

[0003] This utility model provides a protective electrical control system for the battery charger in the cover device of a mixed-rail vehicle. When the external power supply line fails, the power supply to the battery charger can be disconnected to protect the battery charger from being burned out. When the charging interface on one side of the mixed-rail vehicle is supplying power to the battery charger, the circuit on the other side is cut off through electrical circuit interlocking, so that the charging interface on the other side is not energized, thereby improving the safety factor.

[0004] The technical solution to the technical problem solved by this utility model is as follows:

[0005] This utility model discloses a protective electrical control system for a battery charger in a cover-applying device for a mixed-rail vehicle. The cover-applying device includes a first cover-applying control box, a second cover-applying control box, a battery charger, and a battery pack. The first and second cover-applying control boxes are respectively provided with a first charging interface and a second charging interface. The first and second charging interfaces are connected to the battery charger via a first power cable and a second power cable, respectively. The battery charger is connected to the battery pack via a third power cable. The protective electrical control system includes a first circuit breaker, a second circuit breaker, a first phase loss protector, a second phase loss protector, a first AC contactor, and a second AC contactor. The first circuit breaker and the first AC contactor are sequentially mounted on the first power cable, and the second circuit breaker and the second AC contactor are respectively mounted on the first power cable. The first phase loss protector is connected in parallel to the first power cable between the first circuit breaker and the first AC contactor. The voltage terminal of the second phase loss protector is connected in parallel to the second power cable between the second circuit breaker and the second AC contactor. The coil of the first AC contactor, the normally closed auxiliary contact of the first phase loss protector, the normally closed auxiliary contact of the second AC contactor, and the first power cable between the first circuit breaker and the first AC contactor are connected in series through a control cable to form a first control circuit. The coil of the second AC contactor, the normally closed auxiliary contact of the second phase loss protector, the normally closed auxiliary contact of the first AC contactor, and the second power cable between the second circuit breaker and the second AC contactor are connected in series through a control cable to form a second control circuit.

[0006] Furthermore, both the first and second power cables are three-phase four-wire power cables, both the first and second circuit breakers are four-pole circuit breakers, both the first and second AC contactors are four-pole AC contactors, and both the first and second phase loss protectors are three-phase phase loss protectors. The main contacts of the first charging interface, the first circuit breaker, the first phase loss protector, and the first AC contactor are respectively connected to the corresponding phase and neutral wires of the first power cable, and the first control circuit is connected to one of the phase and neutral wires of the first power cable. The main contacts of the second charging interface, the second circuit breaker, the second phase loss protector, and the second AC contactor are respectively connected to the corresponding phase and neutral wires of the second power cable, and the second control circuit is connected to one of the phase and neutral wires of the second power cable.

[0007] Furthermore, a first fuse and a second fuse are respectively provided on the first control circuit and the second control circuit.

[0008] Furthermore, the first cover operation box and the second cover operation box are respectively provided with a first charging indicator light and a second charging indicator light. The first charging indicator light, the normally open auxiliary contact of the first AC contactor and the first power cable between the first AC contactor and the battery charger are connected in series through a control cable to form a first indicator light circuit. The second charging indicator light, the normally open auxiliary contact of the second AC contactor and the second power cable between the second AC contactor and the battery charger are connected in series through a control cable to form a second indicator light circuit.

[0009] Furthermore, a third fuse and a fourth fuse are respectively provided on the first indicator light circuit and the second indicator light circuit.

[0010] When the above-described technical solution is used for the protection electronic control system of the battery charger in the iron-mixing car cover device:

[0011] After the first charging interface is connected to AC power, the first circuit breaker is closed, and the current is transmitted through the first power cable to the first phase loss protector to energize it and perform detection. If the first phase loss protector detects no fault, at the same time, the normally closed auxiliary contact of the first phase loss protector and the normally closed auxiliary contact of the second AC contactor in the first control circuit connected in series with the coil of the first AC contactor form an interlock. If the second charging interface on the side of the second covered operation box is not powered, the coil of the first AC contactor in the first control circuit is energized, and the main contact of the first AC contactor on the first power cable closes to connect the main circuit. The battery charger receives AC power and charges the battery pack.

[0012] After the second charging interface is connected to AC power, the second circuit breaker is closed, and the current is transmitted through the second power cable to the second phase loss protector to energize it and perform detection. If the second phase loss protector detects no fault, at the same time, the normally closed auxiliary contact of the second phase loss protector and the normally closed auxiliary contact of the first AC contactor in the second control circuit connected in series with the coil of the second AC contactor form an interlock. If the first charging interface on the first covered operation box side is not powered, the coil of the second AC contactor in the second control circuit is energized, and the main contact of the second AC contactor on the second power cable closes to connect the main circuit. The battery charger receives AC power and charges the battery pack.

[0013] Compared with the original charging method in the prior art, the protective electrical control system for the battery charger in the cover device of the mixed-rail vehicle described in this utility model has a simple circuit structure. By setting two circuit breakers, two phase loss protectors, and two AC contactors, and connecting the normally closed auxiliary contacts of each phase loss protector and the normally closed auxiliary contacts of the opposite AC contactor in series in the control circuit of the corresponding AC contactor coil, an interlock is formed. This ensures that when one side is charging normally, the charging interface of the cover operation box on the other side is not energized, reducing the risk of electric shock to the operators. In addition, through the function of the phase loss protector, when there is a phase loss, zero loss, overvoltage, or undervoltage in the external power supply, the control circuit can be disconnected, thereby disconnecting the main charging circuit and avoiding the risk of the battery charger being burned out. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the electrical control system design in this utility model;

[0015] Figure 2 This is a schematic diagram of the electrical control system in this utility model;

[0016] In the diagram: 1. First covered control box; 2. Second covered control box; 3. Battery charger; 4. Battery pack; 5. First power cable; 6. Second power cable; 7. First control circuit; 8. Second control circuit; 9. First indicator light circuit; 10. Second indicator light circuit; 11. Third power cable; QF1. First circuit breaker; QF2. Second circuit breaker; BH1. First phase loss protector; BH2. Second phase loss protector; KM1. First AC contactor; KM2. Second AC contactor; FU1. First fuse; FU2. Second fuse; FU3. Third fuse; FU4. Fourth fuse; CDJK1. First charging interface; CDJK2. Second charging interface; RD1. First charging indicator light; RD2. Second charging indicator light. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "back" used in the present patent application specification and claims are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in the present utility model are well-known technologies to those skilled in the art.

[0018] Example 1:

[0019] like Figure 1 and Figure 2 As shown, this utility model discloses a protective electrical control system for a battery charger in a cover-up device for a mixed-rail vehicle. The cover-up device includes a first cover-up operation box 1, a second cover-up operation box 2, a battery charger 3, and a battery pack 4. The first cover-up operation box 1 and the second cover-up operation box 2 are respectively provided with a first charging interface CDJK1 and a second charging interface CDJK2 for obtaining external power. The first charging interface CDJK1 and the second charging interface CDJK2 are respectively connected to the AC input terminal of the battery charger 3 through a first power cable 5 and a second power cable 6. The DC output terminal of the battery charger 3 is connected to the battery pack 4 through a third power cable 11 for charging the battery pack 4.

[0020] The protective electrical control system in this embodiment includes a first circuit breaker QF1, a second circuit breaker QF2, a first phase loss protector BH1, a second phase loss protector BH2, a first AC contactor KM1, and a second AC contactor KM2. Both the first phase loss protector BH1 and the second phase loss protector BH2 ​​have protection functions such as phase loss, neutral loss, overvoltage, and undervoltage. The first circuit breaker QF1 and the first AC contactor KM1 are sequentially mounted on the first power cable 5, and the second circuit breaker QF2 and the second AC contactor KM2 are sequentially mounted on the second power cable 6. The voltage terminals of the first phase loss protector BH1 are connected in parallel to the corresponding phase and neutral lines of the first power cable 5 between the first circuit breaker QF1 and the first AC contactor KM1. The second phase loss protector... The voltage terminals of the protector BH2 ​​are connected in parallel to the corresponding phase and neutral lines of the second power cable 6 between the second circuit breaker QF2 and the second AC contactor KM2. The coil of the first AC contactor KM1, the normally closed auxiliary contact of the first phase loss protector BH1, the normally closed auxiliary contact of the second AC contactor KM2, and the first power cable 5 between the first circuit breaker QF1 and the first AC contactor KM1 are connected in series through a control cable to form a first control circuit 7. The coil of the second AC contactor KM2, the normally closed auxiliary contact of the second phase loss protector BH2, the normally closed auxiliary contact of the first AC contactor KM1, and the second power cable 6 between the second circuit breaker QF2 and the second AC contactor KM2 are connected in series through a control cable to form a second control circuit 8. An interlock is formed by the normally closed auxiliary contact of the first phase loss protector BH1 and the normally closed auxiliary contact of the second AC contactor KM2 in the first control circuit 7, and by the normally closed auxiliary contact of the second phase loss protector BH2 ​​and the normally closed auxiliary contact of the first AC contactor KM1 in the second control circuit 8, so that when one side is energized, the other side is de-energized.

[0021] Taking a three-phase four-wire AC power supply as an example, as a preferred implementation, the first power cable 5 and the second power cable 6 are both three-phase four-wire power cables; the first circuit breaker QF1 and the second circuit breaker QF2 are both four-pole circuit breakers; the first AC contactor KM1 and the second AC contactor KM2 are both four-pole AC contactors; and the first phase loss protector BH1 and the second phase loss protector BH2 ​​are both three-phase phase loss protectors. The first charging interface CDJK1, the first circuit breaker QF1, the first phase loss protector BH1, and the first AC... The main contacts of the current contactor KM1 are connected to the corresponding phase lines and neutral lines of the first power cable 5, and the first control circuit 7 is connected to one of the phase lines and neutral lines of the first power cable 5 to obtain 220V AC power. The main contacts of the second charging interface CDJK2, the second circuit breaker QF2, the second phase loss protector BH2, and the second AC contactor KM2 are connected to the corresponding phase lines and neutral lines of the second power cable 6, and the second control circuit 8 is connected to one of the phase lines and neutral lines of the second power cable 6 to obtain 220V AC power.

[0022] To enhance the safety of the first control loop 7 and the second control loop 8, as a preferred embodiment, a first fuse FU1 and a second fuse FU2 are respectively provided on the first control loop 7 and the second control loop 8.

[0023] To more intuitively determine whether the first cover operation box 1 and the second cover operation box 2 are energized, the first cover operation box 1 and the second cover operation box 2 are respectively equipped with a first charging indicator light RD1 and a second charging indicator light RD2. The first charging indicator light RD1, the normally open auxiliary contact of the first AC contactor KM1, and the first power cable 5 between the first AC contactor KM1 and the battery charger 3 are connected in series through a control cable to form a first indicator light circuit 9. The second charging indicator light RD2, the normally open auxiliary contact of the second AC contactor KM2, and the second power cable 6 between the second AC contactor KM2 and the battery charger 3 are connected in series through a control cable to form a second indicator light circuit 10.

[0024] To enhance the safety of the first indicator light circuit 9 and the second indicator light circuit 9, as a preferred embodiment, a third fuse FU3 and a fourth fuse FU4 are respectively provided on the first indicator light circuit 9 and the second indicator light circuit 10.

[0025] In use, after the first charging interface CDJK1 is connected to a three-phase four-wire AC power supply, the first circuit breaker QF1 is closed. The current is transmitted through the first power cable 5 to the first phase loss protector BH1 to energize it and perform a test. If the first phase loss protector BH1 detects no fault, at the same time, the normally closed auxiliary contact of the first phase loss protector BH1 and the normally closed auxiliary contact of the second AC contactor KM2 in the first control circuit 7, which is connected in series with the coil of the first AC contactor KM1, form an interlock. If the second charging interface CDJK2 on the side of the second covered operating box 2 is not energized, the first AC contactor in the first control circuit 7 will... When the coil of contactor KM1 is energized, the main contacts of the first AC contactor KM1 on the first power cable 5 close, connecting the main charging circuit. The battery charger 3 receives AC power and charges the battery pack 4. Simultaneously, the first indicator circuit 9 is energized, and the first charging indicator RD1 illuminates. Because the coil of the second AC contactor KM2 in the second control circuit 8 on the second covered operating box 2 is interlocked with the normally closed auxiliary contact of the first AC contactor KM1 in series, the second AC contactor KM2 on that side cannot operate, and the second charging interface CDJK2 on the second covered operating box 2 receives no return power. When an external power supply failure occurs, the first phase loss protector BH1 activates, de-energizing the coil of the first AC contactor KM1 on that side, simultaneously cutting off power to the main circuit, and stopping the battery charger 3 from charging, ensuring the charger is not burned out. Charging automatically resumes when the power supply is restored.

[0026] Similarly, after the second charging interface CDJK2 is connected to the AC power supply, the second circuit breaker QF2 is closed, and the current is transmitted to the second phase loss protector BH2 ​​through the second power cable 6 to energize it and perform detection. If the second phase loss protector BH2 ​​detects no fault, at the same time, the normally closed auxiliary contact of the second phase loss protector BH2 ​​and the normally closed auxiliary contact of the first AC contactor KM1 in the second control circuit 8, which is connected in series with the coil of the second AC contactor KM2, form an interlock. If the first charging interface CDJK1 on the side of the first covered operation box 1 is not powered, the coil of the second AC contactor KM2 in the second control circuit 8 is energized, the main contact of the second AC contactor KM2 on the second power cable 6 closes to connect the main circuit, the battery charger 3 obtains AC power and charges the battery pack 4, and at the same time, the second indicator circuit 10 is energized, and the second charging indicator RD2 lights up. Because the coil of the first AC contactor KM1 in the first control circuit 7 on one side of the first covered operating box 1 is connected in series with the normally closed auxiliary contact of the second AC contactor KM2 to form an interlock circuit, the first AC contactor KM1 on this side cannot operate, and the first charging interface CDJK1 on the first covered operating box 1 has no return power. When the external power supply fails, the second phase loss protector BH2 ​​operates, the coil of the second AC contactor KM2 on this side loses power, the main circuit is simultaneously de-energized, and the battery charger 3 stops charging, ensuring that the charger is not burned out. When the power supply is normal, charging automatically resumes.

Claims

1. A protection electric control system for battery charger in a capping device of a mixing car, the capping device comprising a first capping operation box (1), a second capping operation box (2), a battery charger (3) and a battery pack (4), the first capping operation box (1) and the second capping operation box (2) are respectively provided with a first charging interface (CDJK1) and a second charging interface (CDJK2), the first charging interface (CDJK1) and the second charging interface (CDJK2) are respectively connected with the battery charger (3) through a first power cable (5) and a second power cable (6), the battery charger (3) is connected with the battery pack (4) through a third power cable (11), characterized in that, The protection electric control system comprises a first circuit breaker (QF1), a second circuit breaker (QF2), a first phase loss protector (BH1), a second phase loss protector (BH2), a first AC contactor (KM1) and a second AC contactor (KM2), the first circuit breaker (QF1) and the first AC contactor (KM1) are sequentially arranged on the first power cable (5) respectively, the second circuit breaker (QF2) and the second AC contactor (KM2) are sequentially arranged on the second power cable (6) respectively, the voltage connection end of the first phase loss protector (BH1) is connected in parallel to the first power cable (5) between the first circuit breaker (QF1) and the first AC contactor (KM1), the voltage connection end of the second phase loss protector (BH2) is connected in parallel to the second power cable (6) between the second circuit breaker (QF2) and the second AC contactor (KM2), the coil of the first AC contactor (KM1), the auxiliary contact of the first phase loss protector (BH1), the auxiliary contact of the second AC contactor (KM2) and the first power cable (5) between the first circuit breaker (QF1) and the first AC contactor (KM1) are connected in series through a control cable to form a first control loop (7), and the coil of the second AC contactor (KM2), the auxiliary contact of the second phase loss protector (BH2), the auxiliary contact of the first AC contactor (KM1) and the second power cable (6) between the second circuit breaker (QF2) and the second AC contactor (KM2) are connected in series through a control cable to form a second control loop (8).

2. A protection electric control system for battery charger in a covering device for a mixing car according to claim 1, characterized in that, The first power cable (5) and the second power cable (6) are both three-phase four-wire power cables, the first circuit breaker (QF1) and the second circuit breaker (QF2) are both four-pole circuit breakers, the first AC contactor (KM1) and the second AC contactor (KM2) are both four-pole AC contactors, and the first phase loss protector (BH1) and the second phase loss protector (BH2) are both three-phase phase loss protectors; the first charging interface (CDJK1), the first circuit breaker (QF1), the first phase loss protector (BH1) and the main contact of the first AC contactor (KM1) are connected with the corresponding phase lines and zero lines of the first power cable (5) respectively, and the first control loop (7) is connected with one of the phase lines and the zero line of the first power cable (5); the second charging interface (CDJK2), the second circuit breaker (QF2), the second phase loss protector (BH2) and the main contact of the second AC contactor (KM2) are connected with the corresponding phase lines and zero lines of the second power cable (6) respectively, and the second control loop (8) is connected with one of the phase lines and the zero line of the second power cable (6).

3. A protection electric control system for battery charger in a covering device for a mixing car according to claim 1, characterized in that, First and second fuse links (FU1 and FU2) are arranged on the first and second control loops (7 and 8) respectively.

4. A protection electric control system for battery charger in a covering device for a mixing car according to claim 1, characterized in that, The first capping operation box (1) and the second capping operation box (2) are respectively provided with a first charging indicator light (RD1) and a second charging indicator light (RD2), the first charging indicator light (RD1), the first AC contactor (KM1) and the first power cable (5) between the first AC contactor (KM1) and the battery charger (3) are connected in series through a control cable and constitute a first indicator light circuit (9), the second charging indicator light (RD2), the second AC contactor (KM2) and the second power cable (6) between the second AC contactor (KM2) and the battery charger (3) are connected in series through a control cable and constitute a second indicator light circuit (10).

5. A protection electric control system for battery charger in a covering device of a mixing car according to claim 4, characterized in that, The first indicator light circuit (9) and the second indicator light circuit (10) are respectively provided with a third fuse (FU3) and a fourth fuse (FU4).

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