CN203895228U - Online oil purifying device for transformer on-load tap-charger - Google Patents

Abstract

The utility model discloses an online oil purifying device for a transformer on-load tap-charger. The oil purifying device further comprises an oil level alarming lamp, and a controller is provided with an oil level signal terminal. The oil level signal terminal is connected with one or two or three of an alarming signal normally open contact on a gas relay of the on-load tap-charger, the signal output end of an oil level sensor A and the signal output end of an oil level sensor B through a signal line. The oil level sensor A is installed at the 1/4 position of the normal oil level of an oil storage cabinet of the on-load tap-charger, and the oil level sensor B is installed between an air returning opening and an oil returning valve of the on-load tap-charger. The fourth signal output end on a CPU of the controller connects the oil level alarming lamp to a power source. Once the oil level of the on-load tap-charger is lowered to a certain height, the online oil purifying device can stop pumping oil and give out alarming, and therefore the accidents of burnout of the online oil purifying device due to on-load tap-charger insulation breakdowns caused by leakage of oil outlet pipelines can be eradicated.

Description

An online oil purification device for transformer on-load tap changer

technical field

The utility model relates to an online oil purifying device for a transformer on-load tap changer.

Background technique

The existing on-line oil purification device for transformer on-load tap changer is composed of oil inlet flange, motor, oil pump, connecting oil pipe, impurity removal filter, water removal filter, controller, heater, radiator, control cable, outlet Composed of oil flanges and cabinets. The connecting oil pipe is composed of the oil pipe and the cut-off door. The motor is connected to the oil pump, and through the connecting oil pipe, it is sealed and connected with the oil inlet flange, impurity removal filter, water removal filter and oil outlet flange and fixed on the cabinet. . The controller, the heater and the radiator are fixed in the cabinet, and the controller controls the start and stop of the motor, the opening and closing of the heater and the opening and closing of the radiator. The existing on-line oil purification device of the transformer on-load tap-changer is not equipped with an oil level detection and control device for the on-load tap-changer. Once the oil outlet pipeline of the oil purification device leaks, the oil pump of the oil purification device that has been working continuously The insulating oil in the tap-changer is pumped out, but the insulating oil returning to the on-load tap-changer is decreasing, so the oil level of the insulating oil in the on-load tap-changer will gradually decrease. If it is stopped in time, it will cause the insulation breakdown of the on-load tap-changer and burn it, causing the transformer to be out of service, so there is a great potential safety hazard.

Contents of the invention

The purpose of this utility model is to solve the above-mentioned problems existing in the prior art, and to provide an online oil purification device for transformer on-load tap-changers, which can stop oil pumping in time once the oil level of the on-load tap-changer drops to a certain height And report to the police to ensure that the accident of burning the on-load tap-changer insulation breakdown caused by the leakage of the oil outlet pipeline will no longer occur.

In order to achieve the above purpose, the technical solution of the utility model is: an online oil purification device for transformer on-load tap changer, which includes a cabinet, a motor, an oil pump, an oil pipe, an impurity removal filter, a water removal filter, a control The oil inlet and outlet are opened on the cabinet; the oil inlet is connected to the oil inlet valve, oil pump, impurity filter, water filter and oil outlet valve in sequence through the oil pipe, and then connected to the On the oil outlet; the oil pump is connected to the motor; the oil pump, motor, impurity removal filter, water removal filter, controller, heater, and radiator are fixed in the cabinet; the oil inlet is connected through the oil suction pipe and the on-load tap The oil extraction valve of the switch is connected to the oil extraction port of the on-load tap-changer, and the oil outlet is connected to the oil return port of the on-load tap-changer through the oil return pipe and the oil return valve of the on-load tap-changer; the controller There are phase sequence signal terminals, voltage regulation signal terminals, impurity removal signal terminals, water removal signal terminals, motor start terminals, motor stop terminals, two temperature control terminals and multiple signal output terminals on the central processing unit CPU; phase sequence The signal terminal is connected to the normally open contact of the phase sequence protector, the voltage regulating signal terminal is connected to the normally open contact of the voltage regulating relay, the impurity removal signal terminal and the water removal signal terminal are respectively connected to the impurity removal filter and the water removal On the signal output terminal of the pressure sensor on the filter, the motor start terminal, the motor stop terminal, and the two temperature control terminals are respectively connected to the motor start switch, the motor stop switch, and the two temperature control switches; among the multiple signal output terminals One connects the coil of the contactor to the power supply, the other connects the filter alarm light to the power supply, and the third connects to the signal input terminal of the sound alarm; the motor connects to the normally open contact of the contactor, and the two temperature The control switch controls the power on and off of the heater and the radiator respectively; it is characterized in that: the oil purifier also includes an oil level alarm light, and the controller is also provided with an oil level signal terminal; the oil level signal terminal passes through the signal line Connect with one or two or three of the alarm signal normally open contact on the gas relay of the on-load tap-changer, the signal output terminal of the oil level sensor A or the signal output terminal of the oil level sensor B; the oil level sensor A Installed at 1/4 of the normal oil level of the oil conservator of the on-load tap-changer, the oil level sensor B is installed between the oil return port of the on-load tap-changer and the oil return valve; on the central processing unit CPU of the controller The fourth signal output of the oil level warning light is connected to the power supply.

The controller of the utility model issues instructions, the motor rotates, and the oil pump works. The oil pump extracts the dirty insulating oil in the on-load tap changer through the oil suction pipe, and sends it to the impurity removal filter to filter out the impurities in the insulating oil, and then is filtered by the water remover. The device absorbs the moisture in the insulating oil, and then transports it back to the oil chamber of the on-load tap-changer through the oil return pipe, so that the insulating oil is circulated and filtered to be purified. The utility model is equipped with an oil level monitoring and control device of the on-load tap-changer. When the position of the relay or the position of the oil level sensor B is reached, the controller of the present invention will issue an instruction to stop the motor after receiving the oil level abnormal signal, and the oil pump will stop pumping oil and send an alarm signal, which avoids the failure of the oil pipeline caused by the present invention. Accidents caused by the leakage of the on-load tap-changer insulation breakdown and burning.

Description of drawings

Fig. 1 is the structural representation of the utility model first kind of embodiment;

Fig. 2 is the structural representation of the second embodiment of the utility model;

Fig. 3 is the structural representation of the third embodiment of the utility model;

Fig. 4 is a schematic diagram of the control circuit structure of the controller in the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Embodiment 1 shown in Fig. 1 and Fig. 4, present embodiment comprises cabinet body 8, motor 9, oil pump 10, oil pipe 11, impurity removal filter 14, water removal filter 15, controller 5, heater 13 and Radiator 12. An oil inlet 3 and an oil outlet 2 are provided on the cabinet body 8 . The oil inlet 3 is sequentially connected to the oil inlet valve 4, the oil pump 10, the impurity removal filter 14, the water removal filter 15 and the oil outlet valve 1 through the oil pipe 11 and then connected to the oil outlet 2. The oil pump 10 is connected with the motor 9 . Oil pump 10, motor 9, impurity removal filter 14, water removal filter 15, controller 5, heater 12, radiator 13 are fixed in the cabinet body 8. The oil inlet 3 is connected to the oil inlet 25 of the on-load tap changer 21 through the oil extraction pipe 16 and the oil extraction valve 26 of the on-load tap changer 21, and the oil outlet 2 is connected to the oil outlet 2 through the oil return pipe 17 and The oil return valve 18 of the on-load tap changer 21 is connected to the oil return port 20 of the on-load tap changer 21 . The central processing unit CPU of the controller 5 is provided with an oil level signal terminal I1, a phase sequence signal terminal I2, a voltage regulation signal terminal I3, an impurity removal signal terminal I4, a water removal signal terminal I5, a motor start terminal I6, and a motor stop terminal I7 , temperature control terminal I8, four signal output terminals Q1, Q2, Q3 and Q4. The oil level signal terminal I1 is connected to the alarm signal normally open contact 5 - 1 on the gas relay 24 of the on-load tap changer 21 through the signal line 6 . The phase sequence signal terminal I2 is connected to the normally open contact 5-2 of the phase sequence protector, the voltage regulation signal terminal I3 is connected to the normally open contact 5-3 of the voltage regulation relay, and the impurity removal signal terminal I4 is connected to the impurity removal On the signal output end 5-4 of the pressure information sensor on the filter 14, the water removal signal terminal I5 is connected on the signal output end 5-5 of the pressure information sensor on the water removal filter 15, the motor start terminal I6, the motor stop The terminal I7, the two temperature control terminals I8 and I9 are respectively connected to the motor start switch 5-6, the motor stop switch 5-7, and the two temperature control switches 5-8 and 5-9. One end of the signal output terminal Q1 is connected to the live wire L1 of the power supply, the other end is connected to the coil of the contactor 5-14 and then connected to the neutral wire N of the power supply, and the other end is connected to the running indicator light 5-13 and then connected to the neutral wire N of the power supply; the motor 9 is connected to On the normally open contact of contactor 5-14. One end of the signal output terminal Q2 is connected to the live wire L1 of the power supply, and the other end is connected to the oil level alarm lamp 5-12 and then connected to the neutral wire N of the power supply. One end of the signal output terminal Q3 is connected to the live wire L1 of the power supply, and the other end is connected to the filter element alarm lamp 5-11 and then connected to the neutral wire N of the power supply. Both ends of the signal output terminal Q4 are respectively connected to the signal input terminals of the sound alarm 5-10. Temperature control switches 5-8 and 5-9 control the on and off of the power supply of heater 13 and radiator 14 respectively.

Embodiment 2 shown in Figure 2 and Figure 4, its other structures are the same as Embodiment 1, except that the oil level signal terminal I1 on the central processing unit CPU of the controller 5 communicates with the terminal I1 installed on the on-load tap changer through the signal line 6 The signal output terminal of the oil level sensor A 23 of the on-load tap changer 21 at the height 1/4 of the normal oil level of the oil conservator 22 is connected.

Embodiment 3 shown in Figure 3 and Figure 4, its other structures are the same as Embodiment 1, except that the oil level signal terminal I1 on the central processing unit CPU of the controller 5 communicates with the oil level signal terminal I1 installed on the on-load tap changer through the signal line 6 The signal output end of the oil level sensor B19 between the oil return port and the oil return valve is connected.

The oil level signal terminal on the controller of the above-mentioned embodiment can be connected with the alarm signal normally open contact 5-1 on the gas relay of the on-load tap changer, the signal output terminal of the oil level sensor A23 or Two or three of the signal outputs of the oil level sensor B 19 are connected. This structure, when the oil level is at a high place, stop oil pumping and give an alarm when reaching the oil level sensor A 23 place, then stop oil pumping and report to the police when the oil level reaches the gas relay 5-1, if this Failure again, so, when oil level arrives at oil level sensor B 19 places, stop oil pumping again and report to the police, and its monitoring reliability is high.

The above-mentioned embodiments are only preferred and exemplary, and those skilled in the art can make equivalent technical improvements according to the description of this patent, which are all within the protection scope of this patent.

Claims (1)

1. an on-load tap changers of transformers On-line oil filter, it comprises cabinet, motor, oil pump, oil pipe, removal of impurities filter, except water filter, controller, heater and radiator; On cabinet, have oil-in and oil-out; Oil-in by oil pipe be linked in sequence inlet valve, oil pump, removal of impurities filter, except being connected on oil-out after water filter and delivery valve; Oil Pump and Electromotor connects; Oil pump, motor, removal of impurities filter, be fixed in cabinet except water filter, controller, heater, radiator; Described oil-in is connected on the oil pumping mouth of on load tap changer by the oil pumping valve of oil pick-up tube and on load tap changer, and described oil-out is connected on the oil return opening of on load tap changer by the oil return valve of oil return pipe and on load tap changer; On the central processor CPU of controller, be provided with phase sequence signal terminal, pressure regulation signal terminal, removal of impurities signal terminal, the signal terminal that dewaters, electric motor starting terminal, motor and stop terminal, two temperature control terminals and a plurality of signal output part; Phase sequence signal terminal is connected on the normally opened contact of phase sequence relay, pressure regulation signal terminal is connected on the normally opened contact of Voltage regulating relay, removal of impurities signal terminal and the signal terminal that dewaters are connected on removal of impurities filter and the signal output part except the pressure news transducer on water filter, and electric motor starting terminal, motor stop terminal, two temperature control terminals are connected on motor start switch, motor shutdown switch, two temperature detect switch (TDS)s; One of them is connected to a plurality of signal output parts the coil of contactor on power supply, and another is connected to filter core alarm lamp on power supply, the 3rd signal input part that is connected to voice guard; Motor is connected on the normally opened contact of contactor, and two temperature detect switch (TDS)s are switching on and off of control heater and radiator power supply respectively; It is characterized in that: oil purifier also comprises warning lamp, on controller, be also provided with oil level signal terminal; Oil level signal terminal is connected by one or two or three in alarm signal normal-open contact, the signal output part of fuel level sensor A or the signal output part of fuel level sensor B on the Buchholz relay of holding wire and on load tap changer; Fuel level sensor A is arranged on oil conservator normal oil level height 1/4 place of on load tap changer, and fuel level sensor B is arranged between the oil return opening and oil return valve of on load tap changer; The 4th signal output part on the central processor CPU of controller is connected to warning lamp on power supply.