Locomotive transformer oil pump control device

Abstract

The utility model discloses a locomotive transformer oil pump control device, which comprises a programmable logic controller, a control switch, a phase converter and an acousto-optic indication unit, the control switch, the phase converter and the acousto-optic indication unit are electrically connected with the programmable logic controller, the programmable logic controller, the control switch and the phase converter are arranged in a control box, and the acousto-optic indication unit is arranged outside the control box; the programmable logic controller converts a single-group three-phase alternating-current power supply into two or more groups of three-phase alternating-current power supplies through the control switch and the phase converter and intermittently outputs the three-phase alternating-current power supplies to an oil-submerged pump motor of a locomotive transformer, and the acousto-optic indication unit is configured to give an indication in an acousto-optic mode when an oil-submerged pump of the locomotive transformer is in a shutdown stage. According to the utility model, the on-duty process of operators can be omitted, the labor intensity of operation is reduced, the operation efficiency is improved, the operation time of the oil-submerged pump is accurately controlled according to the process time, the operation accuracy and safety are improved, and the risk of burning loss of equipment caused by phase sequence errors of a power supply is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of locomotive transformers, in particular to a locomotive transformer oil pump control device. Background Art

[0002] After the transformer and oil circuit of the electric locomotive are installed, the transformer insulating oil needs to be injected. When injecting oil, air will dissolve into the transformer oil in the form of tiny bubbles. The gas will reduce the insulation performance of the transformer oil and cause the action of the transformer gas protection device, which will harm the operation of the locomotive. Therefore, before the high-voltage operation of the transformer, the gas inside the transformer and in the oil circuit needs to be discharged. According to the exhaust process requirements, the transformer submersible oil pump needs to work in the order of running for 30 minutes, stopping for 30 minutes, running for 1 hour, stopping for 1 hour, running for 2 hours, and stopping. Since the existing equipment is difficult to operate, there are equipment and personnel safety risks, and personnel need to be on duty throughout the process. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a locomotive transformer oil pump control device, which can accurately control the operation of the transformer submersible oil pump, thereby eliminating the need for operating personnel to be on duty, reducing labor intensity, improving operating efficiency, and accurately controlling the operating time of the submersible oil pump according to the process time, thereby improving operation accuracy and safety.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A locomotive transformer oil pump control device comprises a programmable logic controller and a control switch, a phase converter and an acoustic and optical indication unit electrically connected thereto, wherein the programmable logic controller, the control switch and the phase converter are arranged in a control box, and the acoustic and optical indication unit is arranged outside the control box; the programmable logic controller converts a single three-phase AC power supply into two or more three-phase AC power supplies through the control switch and the phase converter, and outputs the power to the submersible oil pump motor of the locomotive transformer intermittently, and the acoustic and optical indication unit is configured to issue an indication by means of sound and light when the submersible oil pump of the locomotive transformer is in a shutdown stage.

[0006] Furthermore, it also includes a phase sequence detector, which is electrically connected to the programmable logic controller and the phase converter.

[0007] Furthermore, it also includes an AC contactor, which is electrically connected to the programmable logic controller and the phase converter.

[0008] Furthermore, it also includes an overcurrent protector, which is electrically connected to the programmable logic controller and the inverter.

[0009] Furthermore, it also includes a motor type circuit breaker, which is electrically connected to the programmable logic controller and the phase converter.

[0010] Furthermore, the sound and light indication unit includes a buzzer prompter, and the buzzer prompter is electrically connected to the programmable logic controller.

[0011] Furthermore, the sound and light indication unit includes a device status indicator light, and the device status indicator light is electrically connected to the programmable logic controller.

[0012] Furthermore, the programmable logic controller converts one set of 380V three-phase AC power into two sets of 380V three-phase AC power by controlling switches and inverters.

[0013] Furthermore, through the control of the programmable logic controller, two groups of 380V three-phase AC power are output at intervals of half an hour, one hour, and two hours respectively to power the submersible oil pump motor of the locomotive transformer.

[0014] Furthermore, based on the control of the programmable logic controller, the submersible oil pump motor of the locomotive transformer runs for half an hour and stops for half an hour; runs for 1 hour and stops for 1 hour; runs for 2 hours and stops, and during the stop stage, the operator is prompted to vent the transformer oil circuit through the sound and light indication unit.

[0015] The beneficial effects of the utility model are:

[0016] The utility model locomotive transformer oil pump control device is controlled by a programmable logic controller, intermittently outputs three-phase AC power to power the submersible oil pump motor of the locomotive transformer, and prompts the operator to vent the transformer oil circuit by sound and light when the submersible oil pump of the locomotive transformer is in the shutdown stage through the sound and light indication unit. The control device has three-phase AC phase sequence protection and conversion function, overcurrent protection function, buzzer prompt function, equipment status indication function, and automatic power off function when the time comes.

[0017] The utility model can eliminate the need for operators to be on duty, reduce the labor intensity of operations, improve operation efficiency, accurately control the operation time of the submersible pump according to the process time, improve operation accuracy and safety, and eliminate the risk of equipment burning due to incorrect power supply phase sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a locomotive transformer oil pump control device according to an embodiment of the utility model.

[0019] Figure 2 It is a schematic diagram of the control box structure of an embodiment of the utility model.

[0020] Reference numerals: PLC-programmable logic controller, KM1, KM2-AC contactors. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model, that is, the embodiments described are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the utility model.

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a locomotive transformer oil pump control device, including a programmable logic controller and a control switch, a phase converter and an acoustic and optical indication unit electrically connected thereto, wherein the programmable logic controller, the control switch and the phase converter are arranged in a control box, and the acoustic and optical indication unit is arranged outside the control box. The programmable logic controller converts a single three-phase AC power supply into two or more three-phase AC power supplies through the control switch and the phase converter, and outputs them intermittently to the submersible oil pump motor of the locomotive transformer, and the acoustic and optical indication unit is configured to issue an indication by means of sound and light when the submersible oil pump of the locomotive transformer is in the shutdown stage, thereby prompting the operator to vent the transformer oil circuit.

[0023] Preferably, the locomotive transformer oil pump control device of this embodiment further includes a phase sequence detector, and the phase sequence detector is electrically connected to the programmable logic controller and the phase converter.

[0024] Preferably, the locomotive transformer oil pump control device of this embodiment further includes an AC contactor, which is electrically connected to the programmable logic controller and the inverter.

[0025] Preferably, the locomotive transformer oil pump control device of this embodiment further includes an overcurrent protector, and the overcurrent protector is electrically connected to the programmable logic controller and the inverter.

[0026] Preferably, the locomotive transformer oil pump control device of this embodiment further includes a motor circuit breaker, which is electrically connected to the programmable logic controller and the inverter.

[0027] Preferably, the sound and light indication unit includes a buzzer prompter, and the buzzer prompter is electrically connected to the programmable logic controller.

[0028] Preferably, the sound and light indication unit includes a device status indicator light, and the device status indicator light is electrically connected to the programmable logic controller.

[0029] Preferably, the programmable logic controller converts one set of 380V three-phase AC power into two sets of 380V three-phase AC power through the control switch and the phase converter, and outputs two sets of 380V three-phase AC power to the submersible oil pump motor of the locomotive transformer at intervals of half an hour, one hour, and two hours respectively through the control of the programmable logic controller. After the equipment is started, the submersible oil pump of the locomotive transformer is operated according to the process time requirements through the automatic control of the program, that is, running for half an hour and stopping for half an hour; running for one hour and stopping for one hour; running for two hours and stopping, and during the stopping stage, the sound and light indication unit is used to remind the operator to exhaust the transformer oil circuit.

[0030] In summary, the locomotive transformer oil pump control device of this embodiment has three-phase AC phase sequence protection and conversion function, overcurrent protection function, buzzer prompt function, equipment status indication function, and automatic power-off function. Through the automatic start and stop function of the tooling equipment, the operator is relieved of the full-time duty process, and the operator can perform other operations during this process.

[0031] (1) The working hours that can be reduced or exempted are ≥ 8 hours;

[0032] (2) Each vehicle can save labor costs of 1×8×90=720 yuan / vehicle;

[0033] (3) Based on an annual production of 100 locomotives, the total savings is 720*100=72,000 yuan

[0034] The locomotive transformer oil pump control device of this embodiment can also reduce the labor intensity of operations, improve work efficiency, improve the accuracy and safety of process operations, and eliminate the risk of equipment burning due to incorrect power supply phase sequence.

[0035] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A locomotive transformer oil pump control device, characterized in that: It includes a programmable logic controller and a control switch, a phase converter and an acoustic and light indication unit electrically connected thereto, wherein the programmable logic controller, the control switch and the phase converter are arranged in a control box, and the acoustic and light indication unit is arranged outside the control box; the programmable logic controller converts a single set of three-phase AC power supply into two or more sets of three-phase AC power supply through the control switch and the phase converter, and outputs the power supply intermittently to the submersible oil pump motor of the locomotive transformer, and the acoustic and light indication unit is configured to issue an indication by means of sound and light when the submersible oil pump of the locomotive transformer is in a shutdown stage.

2. A locomotive transformer oil pump control device according to claim 1, characterized in that: It also includes a phase sequence detector, which is electrically connected to the programmable logic controller and the phase converter.

3. A locomotive transformer oil pump control device according to claim 1, characterized in that: It also includes an AC contactor, which is electrically connected to the programmable logic controller and the phase converter.

4. A locomotive transformer oil pump control device according to claim 1, characterized in that: It also includes an overcurrent protector, which is electrically connected to the programmable logic controller and the phase converter.

5. A locomotive transformer oil pump control device according to claim 1, characterized in that: A motor type circuit breaker is also included, wherein the motor type circuit breaker is electrically connected to the programmable logic controller and the phase converter.

6. A locomotive transformer oil pump control device according to claim 1, characterized in that: The sound and light indication unit comprises a buzzer prompter, and the buzzer prompter is electrically connected to a programmable logic controller.

7. A locomotive transformer oil pump control device according to claim 1, characterized in that: The sound and light indication unit comprises a device status indicator light, and the device status indicator light is electrically connected to a programmable logic controller.

8. A locomotive transformer oil pump control device according to claim 1, characterized in that: The programmable logic controller converts one set of 380V three-phase AC power into two sets of 380V three-phase AC power by controlling switches and inverters.

9. A locomotive transformer oil pump control device according to claim 1, characterized in that: Through the control of the programmable logic controller, two groups of 380V three-phase AC power are output at half an hour, one hour and two hours respectively to power the submersible oil pump motor of the locomotive transformer.

10. A locomotive transformer oil pump control device according to claim 9, characterized in that: Based on the control of the programmable logic controller, the submersible oil pump motor of the locomotive transformer runs for half an hour and stops for half an hour; runs for 1 hour and stops for 1 hour; runs for 2 hours and stops, and during the stop stage, the sound and light indication unit is used to remind the operating personnel to vent the transformer oil circuit.

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