Starting circuit control unit of internal combustion locomotive

Abstract

The utility model relates to a start-up circuit control unit of an internal combustion locomotive, which comprises an intermediate relay, a time relay, a start-up protection contactor and a control board standby switch, and is characterized in that one end of the time relay and one end of the intermediate relay are respectively connected with a first normally open contact of a start-up contactor in an electromagnetic interlocking coil loop of an original start-up circuit; the other ends of the time relay and the intermediate relay are respectively connected with the cathode of the power supply loop; the starting protection contactor is connected in series with the control board standby switch and then is connected into a power supply loop of the original starting circuit; a first normally-closed contact of the starting protection contactor is connected into an electromagnetic interlocking coil loop of the starting circuit, and a second normally-closed contact of the starting protection contactor is connected into a starting motor coil loop of the original starting circuit. The utility model has the positive effects of ensuring the operation safety of equipment and improving the safety of maintenance operation.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel locomotives, and particularly relates to a control unit for an internal combustion engine starting circuit. Background Technique

[0002] During the starting process, the main contacts of the diesel engine starting contactor of DF12 diesel locomotives sometimes adhere. After the diesel engine starts, if the main contacts of the starting contactor adhere, on the one hand, since the auxiliary positive interlock of the starting contactor in the starting circuit part is still in the closed state, it will cause the electromagnetic interlock coil to work under a high-current state. This kind of fault is not easy to detect and cannot be discovered in time. After a long time, it is very easy to cause the electromagnetic interlock coil to burn out, resulting in the shutdown of the diesel engine. On the other hand, when the main contacts of the starting contactor adhere, in order to prevent the expansion of the accident, the crew will use an insulating object to pry open the adhered main contacts, but a strong discharge arc phenomenon will occur during the prying process. There are relatively large potential safety hazards in this treatment process. These are the deficiencies of the prior art. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems put forward in the above background technique, and then a control unit for an internal combustion engine starting circuit is proposed. Through the optimization and transformation of the starting circuit of the diesel locomotive, when the main contacts of the starting contactor adhere, it can timely detect and remind the staff of the fault situation, so as to achieve the purpose of ensuring the safe operation of the equipment and improving the safety guarantee of the maintenance operation.

[0004] The technical solution adopted by the present utility model to solve its technical problems is as follows: An internal combustion locomotive starting circuit control unit includes an intermediate relay ZJ, a time relay SJ, a starting protection contactor QBH, and a console spare switch BK. The intermediate relay ZJ, the time relay SJ, and the starting protection contactor QBH are connected to the power supply circuit of the original starting circuit. One end of the time relay SJ and the intermediate relay ZJ are respectively connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit X of the original starting circuit, and the other ends of the time relay SJ and the intermediate relay ZJ are respectively connected to the negative pole of the power supply circuit; the starting protection contactor QBH and the console spare switch BK are connected in series and then connected to the power supply circuit of the original starting circuit; the first normally closed contact QBH-1 of the starting protection contactor is connected to the electromagnetic interlock coil circuit of the starting circuit. One end of the first normally closed contact QBH-1 of the starting protection contactor is connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit, and the other end of the first normally closed contact QBH-1 of the starting protection contactor is connected to the electromagnetic interlock coil DLS in the electromagnetic interlock coil circuit; the second normally closed contact QBH-2 of the starting protection contactor is connected to the starting motor coil circuit Y of the original starting circuit, and is connected in series with the second normally open contact QC-2 of the starting contactor in the starting motor coil circuit, and then connected to the starting motor QF.

[0005] A further improvement of the present utility model is that the normally open contact ZJ-1 of the intermediate relay is connected in series with the locomotive console spare display lamp L and connected to the electromagnetic interlock coil circuit X. One end of the normally open contact ZJ-1 of the intermediate relay is connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit, and one end of the locomotive console spare display lamp L is connected to the electromagnetic interlock coil DLS in the electromagnetic interlock coil circuit.

[0006] A further improvement of the present utility model is that the first normally open contact QBH-3 of the starting protection contactor is connected to the auxiliary power generation circuit Z and is connected in parallel with the first normally closed contact QC-3 of the starting contactor in the auxiliary power generation circuit, and then connected to the auxiliary power generation contactor FLC.

[0007] The beneficial effects of the present utility model are as follows:

[0008] 1. The circuit transformation is simple, with good performance, stable performance, and safe and reliable;

[0009] 2. Ensure that the electromagnetic interlock coil will not be burned out due to long-term high-current operation;

[0010] 3. Can promptly prompt the driver that the main contact of the starting contactor has adhered, ensuring that the crew can quickly handle it;

[0011] 4. After the contacts are adhered, the crew does not need to use an insulating object to pry open the adhered main contacts. The driver can release them by using the spare console switch, ensuring personal safety. In summary, the utility model has the positive effects of ensuring the safe operation of the equipment and improving the safety of maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the circuit schematic diagram of the utility model. SPECIFIC EMBODIMENTS

[0013] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. The present utility model will be further described in conjunction with the drawings and embodiments:

[0014] As Figure 1 shown, a starting circuit control unit for a diesel locomotive provided by the present utility model includes an intermediate relay ZJ, a time relay SJ, a starting protection contactor QBH, and a console spare switch BK connected to the power supply circuit of the original starting circuit. Specifically, one end of the time relay SJ and the intermediate relay ZJ are respectively connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit X of the original starting circuit, and the other ends of the time relay SJ and the intermediate relay ZJ are respectively connected to the negative pole of the power supply circuit.

[0015] The starting protection contactor QBH and the console spare switch BK are connected in series and then connected to the power supply circuit of the original starting circuit. The first normally closed contact QBH-1 of the starting protection contactor is connected to the electromagnetic interlock coil circuit of the starting circuit. One end of the first normally closed contact of the starting protection contactor is connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit, and the other end of the first normally closed contact of the starting protection contactor is connected to the electromagnetic interlock coil DLS in the electromagnetic interlock coil circuit. The second normally closed contact QBH-2 of the starting protection contactor is connected to the starting motor coil circuit Y of the original starting circuit and is connected in series with the second normally open contact QC-2 of the starting contactor in the starting motor coil circuit, and then connected to the starting motor QF.

[0016] In addition, the normally open contact ZJ-1 of the intermediate relay is connected in series with the standby display lamp L on the locomotive control console and is connected to the coil circuit of the electromagnetic interlock. One end of the normally open contact ZJ-1 of the above intermediate relay is connected to the first normally open contact QC-1 of the starting contactor in the coil circuit of the electromagnetic interlock, and one end of the standby display lamp L on the locomotive control console is connected to the electromagnetic interlock coil DLS in the coil circuit of the electromagnetic interlock. By using the standby display lamp on the locomotive control console as a warning signal lamp and controlling the warning lamp through the action of the intermediate relay, the driver can be timely reminded that the main contact of the starting contactor has adhered, and the crew can be reminded to be aware of the fault situation and make timely handling.

[0017] The working principle of the present utility model is as follows: When the main contact of the starting contactor QC adheres, after the time-delay relay delays for 15 - 20S, the intermediate relay acts, the normally closed and normally open contacts of the intermediate relay close, and the warning signal lamp of the standby display lamp on the locomotive control console lights up, reminding the crew to handle the adhesion of the main contact in time. At this time, when the standby switch on the control console is pressed, the starting protection contactor is energized. On the one hand, the first normally closed contact of the starting protection contactor in the coil circuit of the electromagnetic interlock connected to the starting circuit is disconnected, ensuring that the overcurrent resistor R is not short-circuited, thus ensuring that the electromagnetic interlock coil will not work under high current for a long time and preventing the electromagnetic interlock coil from burning out. On the other hand, the second normally closed contact of the starting protection contactor in the starting motor coil circuit of the original starting circuit is disconnected, so that the starting motor coil circuit where the second normally open contact of the starting contactor in the starting motor coil circuit is located is disconnected. When the main contact of the starting contactor adheres, the present utility model can use the standby switch on the control console to timely eliminate the fault for subsequent maintenance, effectively improving the safety guarantee of personnel operation.

[0018] In addition, in order not to affect the auxiliary power generation of the original starting circuit, the first normally open contact QBH-3 of the starting protection contactor is connected to the auxiliary power generation circuit Z and is connected in parallel with the first normally closed contact QC-3 of the starting contactor in the auxiliary power generation circuit, and then connected to the auxiliary power generation contactor FLC, so as to effectively ensure the normal operation of the auxiliary power generation contactor.

[0019] In summary, the circuit transformation of the present utility model is simple. It can not only timely remind the adhesion fault of the main contact of the starting contactor, but also effectively prevent the electromagnetic interlock coil from burning out and improve the safety guarantee of personnel fault repair operation.

[0020] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present utility model. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An internal combustion locomotive starting circuit control unit, characterized in that, It includes an intermediate relay ZJ, a time relay SJ, a starting protection contactor QBH, and a standby switch BK on the console. The intermediate relay ZJ, the time relay SJ, and the starting protection contactor QBH are connected to the power supply circuit of the original starting circuit. One end of the time relay SJ and the intermediate relay ZJ are respectively connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit X of the original starting circuit, and the other ends of the time relay SJ and the intermediate relay ZJ are respectively connected to the negative pole of the power supply circuit; the starting protection contactor QBH and the standby switch BK on the console are connected in series and then connected to the power supply circuit of the original starting circuit. The first normally closed contact QBH-1 of the starting protection contactor is connected to the electromagnetic interlock coil circuit of the starting circuit. One end of the first normally closed contact QBH-1 of the starting protection contactor is connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit, and the other end of the first normally closed contact QBH-1 of the starting protection contactor is connected to the electromagnetic interlock coil DLS in the electromagnetic interlock coil circuit. The second normally closed contact QBH-2 of the starting protection contactor is connected to the starting motor coil circuit Y of the original starting circuit, is connected in series with the second normally open contact QC-2 of the starting contactor in the starting motor coil circuit, and then is connected to the starting motor QF.

2. The control unit for the starting circuit of an internal combustion locomotive according to claim 1, characterized in that, The normally open contact ZJ-1 of the intermediate relay is connected in series with the standby display lamp L on the locomotive console and is connected to the electromagnetic interlock coil circuit X. One end of the normally open contact ZJ-1 of the intermediate relay is connected to the first normally open contact QC-1 of the starting contactor in the electromagnetic interlock coil circuit, and one end of the standby display lamp L on the locomotive console is connected to the electromagnetic interlock coil DLS in the electromagnetic interlock coil circuit.

3. The starting circuit control unit of a diesel locomotive according to claim 1, characterized in that, The first normally open contact QBH-3 of the starting protection contactor is connected to the auxiliary power generation circuit Z, is connected in parallel with the first normally closed contact QC-3 of the starting contactor in the auxiliary power generation circuit, and then is connected to the auxiliary power generation contactor FLC.

Images