CN104722225A - Electrified replenishing device for transformer oil additive - Google Patents
Electrified replenishing device for transformer oil additive Download PDFInfo
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- CN104722225A CN104722225A CN201510119344.9A CN201510119344A CN104722225A CN 104722225 A CN104722225 A CN 104722225A CN 201510119344 A CN201510119344 A CN 201510119344A CN 104722225 A CN104722225 A CN 104722225A
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Abstract
The invention discloses an electrified replenishing device for a transformer oil additive. The device comprises an automatic additive dissolving system, an automatic control and monitor system and a vacuum degassing oil injection system. According to the electrified replenishing device for the transformer oil additive disclosed by the invention, the transformer oil additive can be replenished when a primary transformer operates in an electrified state, so that the chemical property and the electric property of the transformer oil are quickly enhanced, and the potential safety hazards of the device caused by degradation of the transformer oil are avoided. In the operating process, the device can be used for replenishing the additive, dewatering, degasing, filtering mechanical impurities and the like at the same time, so that the conventional additive replenishing operating step is greatly simplified.
Description
Technical field
The present invention relates to a kind of transformer oil additive supplementing device, particularly a kind of main transformer being applicable to various electric pressure carries out the charged special purpose device adding transformer oil additive.
Background technology
In recent years, in electrical network main transformer running, find that some run additive (T501 antioxidant) content in the longer main fransformer oil of the time limits and decline year by year due to running wastage, have lower than standard value (0.15%).In main transformer running, once additive (T501 antioxidant) content declines in appearance oil, directly will affect the oily level of transformer oil, impel transformer oil rapid degradation, cause the chemical property of transformer oil, electric property reduces fast, the service life of serious curtailment transformer oil.
In order to avoid above adverse consequences, solution adds transformer oil additive (T501 antioxidant) to the underproof main transformer of (T501 antioxidant) content detection of additive in oil.Tradition carries out mending additivated way in oil: had a power failure by main transformer, from releasing appropriate transformer oil in main transformer to dissolving oil tank.Oil in oil tank is heated, when dropping in solid-state additive in oil while hot after oil temperature reaches setting value, then by manually constantly stirring, by deep fat, solid additives being dissolved, being configured to additive mother liquor.Then with vacuum oil-filter, additive mother liquor is injected main transformer inner, finally transformer oil dehydration, degassing filter are carried out to whole main transformer.Because main transformer oil mass is huge, whole adding procedure needs are repeated multiple times carries out heating for dissolving and circulating filtration, and program is very loaded down with trivial details.And when adding, be also often subject to the restriction of weather and environment, need the cooperation of a large amount of people, material, facility, waste time and energy, add a large amount of operating cost and the cost of overhaul, have a strong impact on reliability of operation and the delivery index of main transformer.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, and provide a kind of without the need to being had a power failure by main transformer, do not affect by weather environment, easy to install, the charged supplementing device of a kind of transformer oil additive of few man on duty can be realized.
The charged supplementing device of a kind of transformer oil additive, include additive automatic dissolving system, automatic control and monitoring system, vacuum outgas injection system, described additive automatic dissolving system includes additive dissolving tank, additive dissolving tank includes superposed oil-in and is positioned at the oil-out of bottom, the oil-in of additive dissolving tank is connected with charged supplementing device oil inlet pipe, the porch of oil inlet pipe is provided with the inlet valve of charged supplementing device, the oil content entered by oil inlet pipe is two-way, the normally closed inlet valve of additive dissolving tank of leading up to passes into additive dissolving tank, one tunnel then directly leads to the vacuum tank of vacuum outgas injection system, described vacuum outgas injection system also includes vavuum pump, the delivery valve of low speed oil drain pump and charged supplementing device, delivery valve is arranged on the flowline of charged supplementing device, the inlet valve of charged supplementing device and the oil inlet pipe at delivery valve rear and flowline are provided with the turnover oil pipe coupling cock of linking up oil inlet pipe and flowline, vavuum pump is connected with vacuum tank, vacuum tank also goes out oil strainer by low speed oil drain pump and device successively and is communicated with flowline, the node rear that the fuel-displaced filter bits of device is connected in turnover oil pipe coupling cock with flowline, described additive dissolving tank oil-out is communicated with vacuum tank by the normally closed delivery valve of additive dissolving tank, the inlet valve of described charged supplementing device is operationally connected with main transformer bottom fuel outlet valve by induction type shutoff valve, the delivery valve of charged supplementing device is operationally connected with main transformer conservator fuel feeding valve by induction type shutoff valve, whether in additive dissolving tank, be provided with inductive probe dissolves complete for the additive detected in additive dissolving tank, this inductive probe is connected with automatic control and monitoring system, each magnetic valve is by automatic control and monitoring system control action.
The charged supplementing device of transformer oil additive of the present invention, during use, temporarily changes into the protection of main transformer body gas relay grave gas " signal " from " tripping operation ".Be connected with main transformer bottom fuel outlet valve by charged for transformer oil additive supplementing device inlet valve by induction type shutoff valve, oil pipe, delivery valve is connected with main transformer conservator fuel feeding valve.In additive dissolving tank, put into as calculated and load weighted transformer oil additive (T501 antioxidant).
Engaging means 380V working power, starts the efficient vacuum pump of vacuum outgas injection system, opens supplementing device turnover oil pipe coupling cock, device delivery valve and induction type shutoff valve, vacuumizes device vacuum tank and outlet line.After vacuum reaches setting value, open main transformer conservator fuel feeding valve, from main transformer conservator, oppositely suck a small amount of main transformer body oil by negative pressure of vacuum, device outlet line is full of completely by oil.After main transformer body oil enters vacuum tank from flowline and reaches setting oil level, close turnover oil pipe coupling cock.The inlet valve of slow unlatching main transformer bottom fuel outlet valve, charged supplementing device and induction type shutoff valve, negative pressure of vacuum is utilized to suck in vacuum tank by main transformer body oil, opening low speed oil drain pump notes back in main transformer conservator by the oil after process degassed in vacuum tank by main transformer conservator fuel feeding valve, forms main transformer body oil vacuum outgas closed circuit.
When after main transformer vacuum outgas circulation process working stability, start the additive automatic dissolving program of supplementing device.First the additive dissolving tank oil-feed normally closed solenoid valve be connected on device in-line is opened by automatic control and monitoring system, makes to be full of main transformer body oil in dissolving tank grease chamber.After the additive detected in dissolving tank when inductive probe dissolves signal completely, automatic control and monitoring system main frame sends " starting to add " alarm signal, and automatically open dissolving tank grease chamber oil-feed normally closed solenoid valve and fuel-displaced normally closed solenoid valve.System is by a certain amount of liquor abstraction consoluet below grease chamber in vacuum tank, and in dissolving tank grease chamber, the corresponding new body of input is oily simultaneously.After fresh oil enters, decline with short grained half dissolving layer of additive, inductive probe detects and does not dissolve signal, then the oil-feed normally closed solenoid valve of dissolving tank grease chamber and fuel-displaced normally closed solenoid valve are closed automatically.After additive is dissolved several times, enter the additive mother liquor after vacuum tank and then merge further with body oil in vacuum tank, carry out secondary dilution and dewater degassed.Then mixed oil liquid goes out oil strainer by low speed oil drain pump through device and filters out impurities and particle, injects in main transformer conservator.
Like this by the dissolving of gradation in batches of transformer oil additive, extraction and injection mother liquor, then in conjunction with the oil circulating system of main transformer self, the dilution of additive mother liquor is distributed in main transformer oil, the charged of transformer oil additive can be completed and add overall process.
After the additive in dissolving tank is all added to main transformer, automatically control monitoring reporting system and automatically send " adding complete " alarm signal.As need be again added, by controlling the fuel-displaced normally closed solenoid valve in grease chamber and vent valve switch, by whole for the oil in grease chamber suction vacuum tank, then open dissolving tank enclosing cover and take out cast feeder and again throw in additive, then automatically repeated above preparation by supplementing device, extracted the process of mother liquor.
The oil-out place of additive dissolving tank is provided with additive filter, a pressure controller is provided with at additive filter front, on the oil pipe of additive dissolving tank, the oil pipe of a section is utilized to form a branch road at the normally closed inlet valve of additive dissolving tank and normally closed delivery valve, this branch road is provided with recoil oil pump, and at the oil pipe place of tie point between additive filter and normally closed solenoid valve of normally closed delivery valve, pressure controller is connected with automatic control and monitoring system.
At oil-out place of dissolving tank grease chamber, one additive filter being housed, entering vacuum receiver blocking oil duct for preventing from not dissolving additive granule completely.A pressure controller is provided with at additive filter front.When filter element blocks by additive granule, dissolving tank oil-out pressure is caused to raise, micro-oil circulation cannot be carried out, when the mother liquor prepared also cannot be drawn out of and reach pressure controller setting value, pressure controller is triggered, automatically, will pass in and out oily normally closed solenoid valve and close, and start the recoil oil pump that is contained between dissolving tank grease chamber oil inlet and outlet, in the dissolving tank that recoiled back by the additive granule of blocking filter filter core, re-start dissolving.When reverse oil pump startup and after certain time-delay, system reopens the oily normally closed solenoid valve of turnover and extracts mother liquor, then pressure controller automatic resetting as normal in pressure.
Described additive dissolving tank includes urceolus and is positioned at the detachable cast feeder formation of outer tube inner chamber, the enclosing cover with vent valve and locking device is provided with at the top of urceolus, cast feeder is arranged on the central part of outer tube inner chamber, there is interval in the bottom of cast feeder and outer tube inner chamber at the end, outer tube inner chamber forms dissolving grease chamber, in additive dissolving tank grease chamber, inner bottom part is equipped with multiple heater, described cast feeder is cylindrical body, the bottom of cast feeder is that network structure passes through to allow the qualified additive granule after dissolving, at the inner chamber of cast feeder, a slip plate-like gravity lid is set, slip plate-like gravity covers and moves up and down at cast feeder inner chamber, cover at slip plate-like gravity and be provided with position magnetic induction contact, also be provided with corresponding magnetic inductor in the bottom of cast feeder simultaneously, this inductor is connected with automatic control and monitoring system, for sending " adding complete " alarm signal.
The additive dissolving tank of this structure, by being equipped with heater, for the heating of dissolved oil at dissolving tank grease chamber inner bottom part.Utilize detachable cast feeder, convenient input additive is carried out to cast feeder, a slip cast iron gravity lid is set in cast feeder inside, is arranged to mesh structure by bottom cast feeder, can allow being partly dissolved the additive granule reduced and passing through.Described slip gravity lid is one discoid, the process can dissolved along with additive is slided gradually and is moved down into cast feeder bottom screen place, it is mainly used in preventing the solid additive in cast feeder to be scattered from bung under the effect of oil stream, the Visual Observations Observations signal that all can also dissolve as additive, the magnetic induction contact covering setting at gravity is communicated with monitoring system, for sending " adding complete " alarm signal.
The periphery of slip plate-like gravity lid is provided with roller slide on grease chamber's wall to facilitate.
In additive dissolving tank grease chamber, the end, is also provided with a stirring impeller.
A stirring impeller is had, for accelerating the dissolving of solid additive in oil in the bottom of cast feeder.
Described inductive probe is infrared light responsive detectors, the stirring impeller adding Ji dissolving tank grease chamber with bottom cast feeder between grease chamber's outer wall on respectively have a relative detection window, two detection window fill an infrared light responsive detectors launched and an infrared light responsive detectors received outward respectively.
Below utilizing infrared light responsive detectors seizure dissolving tank, additive dissolves signal completely.
Cast feeder is about 1:10 with the ratio dissolving grease chamber's volume
The middle part of the urceolus of additive dissolving tank is provided with observation window.
The pipeline that dissolving tank delivery valve is communicated with vacuum tank is provided with flow controller.
In sum, the present invention's following advantage compared to existing technology:
The charged supplementing device of transformer oil additive of the present invention, adds transformer oil additive under can be implemented in main transformer charging operation situation, thus the chemical property of fast lifting transformer oil and electric property, avoid the device security hidden danger because oil quality deterioration brings.This device can complete adding the steps such as additive, dehydration, degassed, filtering mechanical admixture in running simultaneously, enormously simplify conventional additive and adds operational sequence.This plant automation degree is high, easy to use, simple to operate, monitors accurate security performance high, and carrying out can not affect by the extraneous factor such as weather, environment when additive is added completely, and additive capacity is accurate, and set-up mode is flexible, and range of application is wide.The all parts of this device all adopt external to install and are connected, and without the need to making any change to main transformer itself, can not affect the normal operation of main transformer.The charged transformer oil additive of adding of the very applicable various electric pressure main transformer of the charged supplementing device of this transformer oil additive uses.
Accompanying drawing explanation
Fig. 1 is the charged supplementing device fundamental diagram of transformer oil additive.
Fig. 2 is transformer oil additive dissolving tank structural representation.
Fig. 3 is that the charged supplementing device of transformer oil additive uses schematic diagram.
Fig. 4 is the charged circuit diagram refilling device of this change device oil additive.
Label instructions: 1 transformer oil additive charged adding device 111 charged adding device suction valve of the 112 charged adding device of the oil valve 113 automatic control monitoring system 114 lower tubing 2 main transformer oil drain valve 3 main transformer oil pillow filling valve 4 induction shut off valve 5 device inlet filter 6 additive dissolving tank filling valve 7 dissolve additives pool feeder stirring pulsator 712 712 711 714 infrared photosensitive detector 715 cast iron gravity ceramic heater cover 716 stainless steel screen mesh 717 induction contact 718 observed 719 detection window 719 since the lock handle 721 air bleeder 722 cover 8 9 additive filter 10 recoil pressure controller 11 dissolve additives pool normally closed out the oil pump valve flow controller 12 13 14 15 low efficient vacuum pump vacuum tank outlet pump oil outlet filter 16 17 in and out of the tubing unicom valve.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in more detail.
Embodiment 1
A kind of as Fig. 1, the charged supplementing device of transformer oil additive shown in Fig. 2, comprise the inlet valve 111 of charged supplementing device, the delivery valve 112 of charged supplementing device, automatic control monitoring reporting system 113, oil pipe 114, induction type shutoff valve 4, device inlet filter 5, additive dissolving tank inlet valve 6, additive dissolving tank 7, cast feeder 711, stir impeller 712, ceramic heater 713, infrared light responsive detectors 714, cast iron gravity lid 715, stainless steel mesh 716, position magnetic induction contact 717, observation window 718, detection window 719, self-locking handle 720, vent valve 721, enclosing cover 722, pressure controller 8, additive filter 9, recoil oil pump 10, the normally closed delivery valve 11 of additive dissolving tank, flow controller 12, vacuum tank 13, efficient vacuum pump 14, low speed oil drain pump 15, device oil-out filter 16, turnover oil pipe coupling cock 17.
Described additive dissolving tank 7, top is the enclosing cover 722 with self-locking handle 720 and vent valve 721, and there are four relative little observation windows 718 at middle part, and inner for dissolving grease chamber, a detachable cast feeder 711 is fixed by central authorities of grease chamber, for placing solid additive.In dissolving tank 7 grease chamber, inner bottom part is equipped with four ceramic heaters 713.A stirring impeller 712 is had in the bottom of cast feeder 711.Stir impeller 712 with bottom cast feeder 711 between grease chamber's outer wall on respectively have that relative detection window 719, two detection window 719 are outer is equipped with an infrared light responsive detectors 714 respectively.Have an oil-in to be connected with additive dissolving tank inlet valve 6 on top, dissolving tank 7 grease chamber, bottom has the normally closed delivery valve 11 of an oil-out and additive dissolving tank to be connected, and the turnover oil for dissolving tank 7 controls automatically.Pipeline between oil inlet and outlet is also connected with pressure controller 8, additive filter 9 and recoil oil pump 10, for carrying out micro-oil circulation and preventing outlet line to be added the blocking of agent granule.
Described detachable cast feeder 711 is steel cylinder, be fixed on the central authorities of additive dissolving tank 7, for stainless steel feeds intake screen cloth 716 bottom it, there is a slip cast iron gravity lid 715 its inside, the position magnetic induction contact 717 that gravity lid 715 is arranged is communicated with monitoring system main frame 113, described slip cast iron gravity lid is one discoid, diagonal angle is equipped with four rolling, heavily about 1.5kg, the process can dissolved along with additive is slided gradually and is moved down into cast feeder bottom screen place, it is mainly used in preventing the solid additive in cast feeder to be scattered from bung under the effect of oil stream, the Visual Observations Observations signal that all can also dissolve as additive, the magnetic induction contact covering setting at gravity is communicated with monitoring system, for sending " adding complete " alarm signal.
Described vacuum outgas injection system is made up of, for setting up main transformer body oil vacuum outgas closed circuit the delivery valve 112, device inlet filter 5, vacuum tank 13, efficient vacuum pump 14, low speed oil drain pump 15, device oil-out filter 16, turnover oil pipe coupling cock 17 etc. of the inlet valve 111 of charged supplementing device, charged supplementing device.
Described stirring impeller is the convex impeller of an aluminium alloy, is fixed on bottom grease chamber, utilizes an ac motor to drive.
Described heater is ceramic heater, ceramic heater every l group heating power 10kW, adopts isolation heating, by ceramic rod indirect transfer heat, oil discord heater directly contacts, and no matter how high heter temperature is, all can not make oil degradation, by temperature control system, oil temperature be controlled automatically at 55 ± 5 DEG C.
Described vacuum tank utilizes the transpirable feature of water when vacuum state, in vacuum and not too
Make W/O part at high temperature, gas fully evaporated, thus reach the degassed object of dehydration.It also has the Automatic Control Component of adjusting oil mass, can automatically control oil level in tank.
Described low speed oil drain pump is the adjustable low speed oil pump of flow velocity 50L/min-100L/min, its 380V ac motor being 300 turns/min by rotating speed drives, mixed fluid is noted back main transformer conservator by the oil pressure being mainly used in providing certain, adopts low speed oil pump can also avoid oil stream electrostatic phenomenon occurs during charged oil strain.
Described automatic control monitoring reporting system is made up of AVR single chip controller and temperature controller, pressure sensor and the induction type shutoff valve, alarm etc. be contained on turnover oil pipe line; for the ruuning situation of monitoring arrangement; when device a large amount of leakage of oil occurs or be abnormal, automatically device can be shut down and main transformer turnover fuel tap door termination will be added.As Fig. 4:
When using this device, the air switch QK that closes is to device input 380V power supply, and testing fixture total guard's valve SB, in normally closed operating position, presses and shuts down involution switch S B1 by the involution of emergency shutdown loop, induction type shutoff valve is switched to " manually " pattern.
Open SA1, contactor KM1 action launching vaccum pump motor M1 starts to vacuumize, SA3 is opened after vacuum reaches, induction type shutoff valve 1 relay 6J starts, its normal opened contact 6J1 closes and is opened by the induction type shutoff valve 4 be contained on conservator oil fuel tube, starts to vacuumize device vacuum tank 13 and outlet line.Then from main transformer conservator, a small amount of main transformer body oil is oppositely sucked in vacuum tank 13 by the oily union 17 of turnover.After reaching setting oil level, open SA4, induction type shutoff valve 2 relay 7J and start.Its normal opened contact 7J1 closes and is opened by the induction type shutoff valve 4 be contained on the fuel outlet valve of main transformer bottom, and main transformer body oil sucks in vacuum tank 13 by device bottom main transformer.Open SA2 again, contactor KM2 action launching oil drain pump motor M 2, is returned the oil after vacuum outgas in vacuum tank 13 in main transformer conservator by main transformer conservator fuel feeding valve 3 note.Finally open SA5, oil temperature does not rise because of oil level existing in vacuum tank and in tank, and vacuum tank oil level controls contact YW and temperature control contact WK1 and closes, and contactor KM6 action launching vacuum tank heater heats oil in vacuum tank.So just form main transformer body oil vacuum outgas closed circuit.When after main transformer vacuum outgas circulation process working stability, induction type shutoff valve is switched to " automatically " pattern, induction type shutoff valve pressure sensitive KPR3 and KPR4 enters monitor state.
Open SA6 additive automatic dissolving and add program startup.Due in now dissolving tank 7 grease chamber without oil, infrared light responsive detectors 714 signal communication, its contact GJ closes, make turnover fuel tap control relay 1J, 2J action, its normal opened contact 1J1,2J1 are closed, dissolving tank 7 grease chamber's oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11 are opened, makes to be full of main transformer body oil in dissolving tank 7 grease chamber.Meanwhile control relay 3J, 4J, WK2 action, dissolving tank temperature control contact WK2 closes, contactor KM7 action launching dissolving tank heater 713; Recoil oil pump rotates forward normal opened contact 3J1 and closes, contactor KM4 action launching recoil oil pump 10 motor M 4, starts to carry out micro-oil circulation; Mixing control normal opened contact 4J1 closes, contactor KM3 action launching stirring motor, drives stirring impeller 712 to start to stir.
Due to deep fat dissolution, when there being solid additive granule to fall into oil from the stainless steel mesh 716 bottom cast feeder, during by infrared light responsive detectors 714 signal blocker, its contact GJ disconnects.Control relay 1J, 2J involution, its normal opened contact 1J1,2J1 disconnect, and oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11 are closed.Additive agitating heating course of dissolution is proceeded in dissolving tank 7 grease chamber.
Below dissolving tank 7, additive dissolves completely, and infrared light responsive detectors 714 signal is again after UNICOM, and its contact GJ closes.Control relay 1J, 2J start, oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11 are opened again, under vacuum below grease chamber consoluet a certain amount of mother liquor by automatic suction vacuum tank 13.When extracting mother liquor amount out and reaching setting value, flow controller 12 action, its normally closed contact LK cutoff circuit, closes oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11.Now, decline with short grained half dissolving layer of additive after consoluet mother liquor is drawn out of, infrared light responsive detectors 714 signal is blocked again, and its contact GJ disconnects.Device continues to repeat above dissolving, stirring, extraction mother liquor process to rest additive in cast feeder 711.After the additive in cast feeder 711 all dissolves, the magnetic induction contact CG on cast feeder closes, and device sends sound and light alarm signal automatically.
When filter 9 filter core is added the blocking of agent granule, when causing the rising of dissolving tank 7 oil-out pressure to reach pressure controller 8 setting value, the fuel-displaced pressure controller KPR2 of dissolving tank closes, and makes recoil oil pump motor reversion relay 5J action.Its normally closed contact 5J1,5J2 disconnect, and oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11 are closed, recoil oil pump motor positive contactor KM4 involution.The contactor of recoil oil pump motor reversion simultaneously KM5 action, recoil oil pump 10 motor M 4 is reversed, and re-starts dissolving in the dissolving tank 7 that recoiled back by the additive granule of blocking filter 9 filter core.After dissolving tank 7 oil-out pressure is normal, the fuel-displaced pressure controller KPR2 of dissolving tank disconnects, and recoil oil pump motor recovers to rotate forward automatically.
When exception occurs device in startup optimization process, only can disconnecting apparatus control power supply need be shut down by device by the total guard's valve SB of lower device.And when device leaks in a large number because of oil-out blocking, main transformer inlet and outlet of fuel channel, when causing turnover oil pressure instantaneous variation to exceed setting value.As long as oil-out pressure controller KPR1, induction type shutoff valve pressure sensitive KPR3 and KPR4 is arbitrary is triggered, device shuts down relay K A all can action.Its normal opened contact KA1, KA2 are closed, and device continues to send sound and light alarm signal; Its normally closed contact KA3 disconnects, and will control dump rapidly, and make device autostop immediately; The induction type shutoff valve be simultaneously contained on main transformer returns to normally off automatically, is cut off by main transformer turnover oil stream.Shut down involution switch S B1 and before total for device guard's valve SB is returned to normally closed operating position not pressing, device remains stopped status.Thus ensure that device and be added use and the security of operation of equipment.
Described induction type shutoff valve is bimodulus stop valve, there is automatic and manual mode, when there is abnormal a large amount of leakage of oil in supplementing device work, main transformer can be imported and exported oil stream and cut off by its instantaneous variation by induction import and export oil pressure fast, prevents transformer oil from leaking in a large number and causes equipment breakdown.
During use, the protection of main transformer body gas relay grave gas is temporarily changed into " signal " from " tripping operation ".Be connected with main transformer bottom fuel outlet valve 2 by the inlet valve 111 of charged for transformer oil additive supplementing device 1 by induction type shutoff valve 4, oil pipe 114, delivery valve 113 is connected with main transformer conservator fuel feeding valve 3.In the cast feeder 711 of additive dissolving tank 7, put into as calculated and load weighted transformer oil additive (T501 antioxidant), add slip cast iron gravity lid 715, then cast feeder 711 is put into dissolving tank 7, then by self-locking handle 720, enclosing cover 722 is reliably closed.
Engaging means 380V working power, starts the efficient vacuum pump 14 of vacuum filter system, and the delivery valve 112 of unlatching supplementing device turnover oil pipe coupling cock 17, charged supplementing device and induction type shutoff valve 4, vacuumize device vacuum tank 13 and outlet line.After vacuum reaches setting value, open main transformer conservator fuel feeding valve 3, from main transformer conservator, oppositely suck a small amount of main transformer body oil by negative pressure of vacuum, device outlet line is full of completely by oil.After main transformer body oil enters vacuum tank 13 from flowline and reaches setting oil level, close turnover oil pipe coupling cock 17.The inlet valve 111 of slow unlatching main transformer bottom fuel outlet valve 2, charged supplementing device and induction type shutoff valve 4, negative pressure of vacuum is utilized to suck in vacuum tank 13 by main transformer body oil, opening low speed oil drain pump 15 will through device inlet filter 5 and device oil-out filter 16 filtering mechanical admixture, and the oil in vacuum tank 13 after degassed process returns in main transformer conservator by main transformer conservator fuel feeding valve 3 note, form main transformer body oil vacuum outgas closed circuit.
When after main transformer vacuum outgas circulation process working stability, start the additive automatic dissolving program of supplementing device 1.First the additive dissolving tank 7 grease chamber's oil-feed normally closed solenoid valve 6 be connected on device in-line is opened by automatic control monitoring reporting system 113, makes to be full of main transformer body oil in dissolving tank 7 grease chamber, and drains the air in grease chamber from vent valve 721.Subsequently, the built-in heater 713 in dissolving tank 7 grease chamber starts, and the oil bottom grease chamber is heated to gradually additive solution temperature (55 DEG C), and keeps constant temperature.Meanwhile, the stirring impeller 712 be contained in bottom dissolving tank 7 grease chamber start to start the recoil oil pump 10 carrying out stirring, be connected in dissolving tank grease chamber oil inlet and outlet also start carry out micro-oil circulation.Through certain hour heating, stir and micro-oil circulation, due to deep fat dissolution, the solid additive particle in cast feeder 711 from large to small, falls into oil from the stainless steel mesh 716 bottom cast feeder successively.Due to more higher close to bottom heaters temperature, additive dissolves faster.In the temperature difference with under stirring centrifugal action, cast feeder 711 bottom starts to be formed with short grained half dissolving layer of additive and consoluet additive mother liquor layer.
When infrared photosensitive detector 714 is from dissolving tank 7 grease chamber bottom detection window 719, capture after below dissolving tank, additive dissolves signal completely, automatic control monitoring reporting system 113 sends alarm signal, and automatically opens dissolving tank 7 grease chamber's oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11.System utilize flow controller 12 control automatically by a certain amount of liquor abstraction consoluet below grease chamber in vacuum tank 13, in dissolving tank 7 grease chamber, input the new body oil of respective volume simultaneously.After fresh oil enters, decline with short grained half dissolving layer of additive, infrared light responsive detectors 714 fails to capture dissolving signal from detection window 719, then the oil-feed normally closed solenoid valve 6 of dissolving tank 7 grease chamber and fuel-displaced normally closed solenoid valve 11 are closed automatically.Device continues to repeat above dissolving, stirring, extraction mother liquor process to rest additive in cast feeder 711, until the additive in cast feeder 711 all dissolves complete.
At the additive filter 9 at oil-out place of dissolving tank 7 grease chamber, enter vacuum tank 13 block oil duct for preventing from not dissolving additive granule completely.Be pressure controller 8 in additive filter 9 front end.When filter 9 filter core blocks by additive granule, dissolving tank 7 oil-out pressure is caused to raise, micro-oil circulation cannot be carried out, when the mother liquor prepared also cannot be drawn out of and reach pressure controller 8 setting value, pressure controller 8 is triggered, automatically dissolving tank 7 grease chamber's oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11 are closed, and start the recoil oil pump 10 be contained between dissolving tank 7 grease chamber oil inlet and outlet, re-start dissolving in the dissolving tank 7 that recoiled back by the additive granule of blocking filter 9 filter core.When reverse oil pump 10 starts and after certain time-delay, system reopens dissolving tank 7 grease chamber's oil-feed normally closed solenoid valve 6 and fuel-displaced normally closed solenoid valve 11 extracts mother liquor, then pressure controller 8 automatic resetting as normal in pressure.
Enter the additive mother liquor after vacuum tank 13 then to merge further with body oil in vacuum tank 13, carry out secondary dilution and dewater degassed.Then miscella is admitted in oil-out filter 16 and filters out impurities and particle, is finally injected in main transformer conservator by low speed oil drain pump 15, completes automatic adding procedure.
After the additive in dissolving tank 7 grease chamber cast feeder 711 is all added to main transformer, automatically control monitoring reporting system 113 and automatically send " adding complete " alarm signal.As need be again added, by controlling the fuel-displaced normally closed solenoid valve 11 in dissolving tank 7 grease chamber and vent valve 721 switch, by whole for the oil in grease chamber suction vacuum tank 13, open dissolving tank 7 enclosing cover 722 again to take out cast feeder 711 and again throw in additive, automatically repeated above preparation by supplementing device 1, extracted the process of mother liquor.
It is same as the prior art that the present embodiment does not state part.
Claims (9)
1. the charged supplementing device of transformer oil additive, it is characterized in that: include additive automatic dissolving system, automatic control and monitoring system, vacuum outgas injection system, described additive automatic dissolving system includes additive dissolving tank, additive dissolving tank includes superposed oil-in and is positioned at the oil-out of bottom, the oil-in of additive dissolving tank is connected with charged supplementing device oil inlet pipe, the porch of oil inlet pipe is provided with the inlet valve of charged supplementing device, the oil content entered by oil inlet pipe is two-way, the normally closed inlet valve of additive dissolving tank of leading up to passes into additive dissolving tank, one tunnel then directly leads to the vacuum tank of vacuum outgas injection system, described vacuum outgas injection system also includes vavuum pump, the delivery valve of low speed oil drain pump and charged supplementing device, delivery valve is arranged on the flowline of charged supplementing device, the inlet valve of charged supplementing device and the oil inlet pipe at delivery valve rear and flowline are provided with the turnover oil pipe coupling cock of linking up oil inlet pipe and flowline, vavuum pump is connected with vacuum tank, vacuum tank also goes out oil strainer by low speed oil drain pump and device successively and is communicated with flowline, the node rear that the fuel-displaced filter bits of device is connected in turnover oil pipe coupling cock with flowline, described additive dissolving tank oil-out is communicated with vacuum tank by the normally closed delivery valve of additive dissolving tank, the inlet valve of described charged supplementing device is operationally connected with main transformer bottom fuel outlet valve by induction type shutoff valve, the delivery valve of charged supplementing device is operationally connected with main transformer conservator fuel feeding valve by induction type shutoff valve, whether in additive dissolving tank, be provided with inductive probe dissolves complete for the additive detected in additive dissolving tank, this inductive probe is connected with automatic control and monitoring system, each magnetic valve is by automatic control and monitoring system control action.
2. the charged supplementing device of a kind of transformer oil additive according to claim 1, it is characterized in that: the oil-out place of additive dissolving tank is provided with additive filter, a pressure controller is provided with at additive filter front, on the oil pipe of additive dissolving tank, the oil pipe of a section is utilized to form a branch road at the normally closed inlet valve of additive dissolving tank and normally closed delivery valve, this branch road is provided with recoil oil pump, and at the oil pipe place of tie point between additive filter and normally closed solenoid valve of normally closed delivery valve, pressure controller is connected with automatic control and monitoring system.
3. the charged supplementing device of a kind of transformer oil additive according to claim 2, it is characterized in that: described additive dissolving tank includes urceolus and is positioned at the detachable cast feeder formation of outer tube inner chamber, the enclosing cover with vent valve and locking device is provided with at the top of urceolus, cast feeder is arranged on the central part of outer tube inner chamber, there is interval in the bottom of cast feeder and outer tube inner chamber at the end, outer tube inner chamber forms dissolving grease chamber, in additive dissolving tank grease chamber, inner bottom part is equipped with multiple heater, described cast feeder is cylindrical body, the bottom of cast feeder is that network structure passes through to allow the qualified additive granule after dissolving, at the inner chamber of cast feeder, a slip plate-like gravity lid is set, slip plate-like gravity covers and moves up and down at cast feeder inner chamber, cover at slip plate-like gravity and be provided with position magnetic induction contact, also be provided with corresponding magnetic inductor in the bottom of cast feeder simultaneously, this inductor is connected with automatic control and monitoring system, for sending " adding complete " alarm signal.
4. the charged supplementing device of a kind of transformer oil additive according to claim 3, is characterized in that: the periphery of slip plate-like gravity lid is provided with roller and slides on grease chamber's wall to facilitate.
5. the charged supplementing device of a kind of transformer oil additive according to claim 4, is characterized in that: in additive dissolving tank grease chamber, the end is also provided with a stirring impeller.
6. the charged supplementing device of a kind of transformer oil additive according to claim 5, it is characterized in that: described inductive probe is infrared light responsive detectors, stirring impeller in additive dissolving tank grease chamber with bottom cast feeder between grease chamber's outer wall on respectively have a relative detection window, two detection window fill an infrared light responsive detectors launched and an infrared light responsive detectors received outward respectively.
7. according to a kind of transformer oil additive charged supplementing device of claim 1 to 6 described in any one, it is characterized in that: cast feeder is about 1:10 with the ratio dissolving grease chamber's volume.
8. the charged supplementing device of a kind of transformer oil additive according to claim 7, is characterized in that: the middle part of the urceolus of additive dissolving tank is provided with observation window.
9. the charged supplementing device of a kind of transformer oil additive according to claim 8, is characterized in that: on the pipeline that dissolving tank delivery valve is communicated with vacuum tank, be provided with flow controller.
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| CN201510119344.9A CN104722225B (en) | 2015-03-18 | 2015-03-18 | A kind of powered supplementing device of transformer oil additive |
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| CN201510119344.9A CN104722225B (en) | 2015-03-18 | 2015-03-18 | A kind of powered supplementing device of transformer oil additive |
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| CN104722225B CN104722225B (en) | 2017-12-01 |
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| CN105185545A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | 75 MVA transformer capable of realizing pressure relief and explosion prevention |
| CN105185543A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | Explosion-proof 75MVA transformer |
| CN105845377A (en) * | 2016-05-16 | 2016-08-10 | 国家电网公司 | Oil flow live-line suppression method and device of large-scale transformer during live-line oil filtering |
| GR20170100291A (en) * | 2017-06-23 | 2019-03-20 | Αλεξανδρος Ηλια Παπαδοπουλος | Device for the continuous recirculation, maintenance and addition of additives to transformers insulation oils |
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| CN104722225B (en) | 2017-12-01 |
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