CN110504086A - The pneumatic oil draining system of transformer fault - Google Patents
The pneumatic oil draining system of transformer fault Download PDFInfo
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- CN110504086A CN110504086A CN201910870493.7A CN201910870493A CN110504086A CN 110504086 A CN110504086 A CN 110504086A CN 201910870493 A CN201910870493 A CN 201910870493A CN 110504086 A CN110504086 A CN 110504086A
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- 239000007789 gas Substances 0.000 claims abstract description 90
- 238000000605 extraction Methods 0.000 claims abstract description 77
- 239000003063 flame retardant Substances 0.000 claims abstract description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- 241000009298 Trigla lyra Species 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 239000002828 fuel tank Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention is related to a kind of pneumatic running scheme of Accident of Transformer drain line, is made of operated pneumatic valve and rupture disk component and atmospheric control.When catastrophe failure, which occurs, in transformer needs oil extraction, rupture disk is first opened by atmospheric control, is then turned on operated pneumatic valve, is realized in safety zone remote hand control or automatically controlled transformer oil extraction.While atmospheric control can open the operated pneumatic valve being arranged on fire-retardant gas pipeline and inject fire-retardant gas into transformer, realize fire prevention and fire extinguishing；Oil conservater is also able to achieve simultaneously to shut off and orient oil extraction；The light detection and pressure detecting necessary condition for determining transformer fault oil extraction and infusing nitrogen are increased simultaneously.This programme, which solves existing equipment, safe oil extraction and existing oil draining nitrogen filling system to start the problems such as unreliable in transformer danger.
Description
Technical field
The invention is related to a kind of pneumatic oil draining system of transformer fault, belongs to power equipment safety field.
Background technique
According to electric system specification, medium-and-large-sized transformer, should be by transformer when significant trouble appearance burning risk occurs
Built-in electrical insulation oil is quickly discharged to emergency oil reservoir.But at present in net running equipment and Substation Design, Accident of Transformer row
Oil pipe line is to open accident oil extraction by manual gate valve and cobbing glass capsulation piece.When there is burning risk in transformer,
Operator need to take one's life in one's hands Open valve and shattered glass piece, usually can not the row of realization again if transformer has burnt
Oil, can only transformer burning and explosion at one's discretion.To solve this risk problem, transformer management unit uses and arranges transformer
Oil pipe line guides to firewall other side setting valve, the risk of Open valve when reducing transformer burning, but oil storage pool entrance
Glass capsulation plate, which is still far controlled without reliable scheme, to be broken up.In addition, the oil draining nitrogen filling system that network system uses at present, due to holding
The problems such as row mechanism is mostly mechanical chain and automatically controlled, and it is poor that there is also Reliability of Microprocessor, and malfunction risk is big, and do not have in draining valve rear end
There is seal protection, directly transformer oil is discharged after valve malfunction, is caused the accident, is had an immense impact on.
Summary of the invention
The invention technical problems to be solved are to provide a kind of pneumatic oil draining system of transformer fault, which can be
When transformer failure fire-prone, non-automatically controlled long-range quickly unlatching Transformer oil drain valve door is realized, and turn off oil conservater
With transformer connecting valve, while fire-retardant gas is injected to inside transformer, realizes fire extinguishing and fire prevention, while being avoided that maloperation
And false triggering, drain line sealed reliable when also ensuring that normal operation.
The specific technical solution of the invention is as follows: a kind of pneumatic oil draining system of transformer fault, transformer oil discharge outlet
It is connected to pneumatic discharge equipment and controls the atmospheric control of pneumatic discharge equipment；Pneumatic discharge equipment is by pneumatic draining valve string
Join rupture disk component to constitute, or is made of two concatenated pneumatic gentle seal valves of draining valve；Pneumatic draining valve is controlled to open
And each road pneumatic pilot line for popping of rupture disk is connected to atmospheric control, atmospheric control be by oil extraction control valve,
The Pneumatic control cabinet form that rupture disk control valve, pressure gauge and gas source are constituted.
Pneumatic draining valve, the outlet joined assemblies pipeline and rupture disk of pneumatic draining valve, explosion are connected in transformer oil discharge outlet
The outlet of piece enters underground oil extraction pond by the road；Air inlet is set on component pipeline and connects rupture disk and opens control piper to gas
Autocontrol system；Control piper is opened in the control unit connection oil extraction of pneumatic draining valve and oil extraction closes control piper to pneumatic control
System；Wherein rupture disk opens control piper and is sequentially connected rupture disk opening controlling valve, pressure reducing valve and gas source main valve, for controlling
Rupture disk is opened；Control piper is opened in oil extraction and oil extraction closes control piper and is respectively connected to reversal valve, then is sequentially connected oil extraction
Control valve, pressure reducing valve and gas source main valve are opened and closed for controlling pneumatic draining valve.
Oil tank of transformer is connected to fire-retardant gas pipeline, is connected to fire-retardant gas cylinder through fire-retardant gas pipe valve and pressure reducing valve
Total valve.
Oil tank of transformer is connected to fire-retardant gas pipeline, and fire-retardant gas pipeline is equipped with fire-retardant gas pipeline pneumatic operated valve, resistance
The control unit connecting line of gas piping pneumatic operated valve is fired to atmospheric control, and fire-retardant by what is be arranged in atmospheric control
Gas control valve control.
Oil conservater pneuamtic shutoff valves are connected on the oil conservater export pipeline in portion on the transformer, oil conservater pneuamtic shutoff valves
Control unit connecting line to atmospheric control, oil conservater pneuamtic shutoff valves are cut by the oil conservater being arranged in atmospheric control
Flow control valve control.
The pneumatic draining valve of oil conservater is connected on the oil conservater export pipeline in portion on the transformer, the pneumatic draining valve of oil conservater
Control unit connecting line to atmospheric control, the pneumatic draining valve of oil conservater is arranged by the oil conservater being arranged in atmospheric control
Oil control valve control.
The control method of the above-mentioned pneumatic oil draining system of transformer fault, comprising the following steps:
1) transformer normal operating condition: pneumatic draining valve is in close state, and rupture disk is in intact sealing state, explosion
Piece opens control piper and oil extraction opens control piper and is connected to atmospheric control, but atmospheric control does not provide gas
Pressure；
2) transformer failure needs oil extraction: providing air pressure by atmospheric control, first opens control piper to rupture disk
Interior injection air pressure allows rupture disk to pop, and then opens injection air pressure in control piper to oil extraction and pneumatic draining valve is allowed to open, transformation
Device realizes oil extraction.
Another control method of the above-mentioned pneumatic oil draining system of transformer fault, comprising the following steps:
1) transformer normal operating condition: fire-retardant gas pipeline pneumatic operated valve is in close state, and fire-retardant gas control valve, which is in, to close
Closed state；
2) transformer failure needs oil extraction: providing air pressure by atmospheric control, first opens rupture disk or pneumostop
Valve is then turned on pneumatic draining valve, and transformer starts oil extraction, then opens fire-retardant gas control valve, and air pressure is allowed to drive fire-retardant gas
Body pipeline pneumatic operated valve is opened, and is realized and is injected fire-retardant gas into transformer.
Preferably, the control method of the pneumatic oil draining system of transformer fault is provided with photoelectric sensor on the transformer, uses
The optical signal inside detection oil tank of transformer, and the photoelectric sensor is detected that flame signal is opened as oil extraction and note nitrogen pipeline
The necessary condition opened.
Preferably, the control method of the pneumatic oil draining system of transformer fault is provided with pressure sensor on the transformer, uses
Detect 60KPa and pressure above as oil extraction and note nitrogen in detection oil tank of transformer internal pressure, and using the pressure sensor
The necessary condition that pipeline is opened.
The pneumatic oil draining system of the transformer fault has the advantages that
1, accident oil extraction can be realized by the valve of remote opening rupture disk and accident oil-drain pipe under no electric condition, by pneumatic
Control mode, control are simple, safe；
2, it using operated pneumatic valve and rupture disk series system, first opens rupture disk and is then turned on valve, may be implemented more effectively close
Malfunction oil extraction is sealed and prevented, is remotely controlled by air pressure, is opened rapidly, reliably；
3, using driving gas source control rupture disk and operated pneumatic valve, when transformer equipment operates normally, driving gas source pipeline without
Air pressure, only gas source total valve open and could generate driving pressure after branch valve opening.Therefore system, which will not generate, accidentally grasps
Make and self-starting risk, securely and reliably, Maintenance free；It is easy using weight Open valve to solve current oil-drainage nitrogen-filling fire-extinguishing
Malfunction, easy bite problem；
4, it can be achieved that fire-retardant gas, realization fire prevention and fire extinguishing are injected in pneumatic control while realizing pneumatic control oil extraction.Simultaneously
It also achieves and shuts off between long-range pneumatic control oil conservater and transformer with oil conservater to the oil extraction of oil extraction pond；
5, it this method increase the light detection and pressure detecting necessary condition that determine transformer fault oil extraction and note nitrogen, can effectively mention
Rise the reliability of oil-drainage nitrogen-filling fire-extinguishing starting；
6, this method can be used to the transformation of existing accident oil-drain pipe, it can also be used to existing oil-drainage nitrogen-filling fire-extinguishing oil exit pipe
The update on road and note nitrogen pipeline, can greatly improve system reliability, and it is horizontal to promote transformer safety.
Detailed description of the invention
Fig. 1 is pneumatic one structural schematic diagram of oil draining system embodiment of transformer fault.
Fig. 2 is pneumatic two structural schematic diagram of oil draining system embodiment of transformer fault.
Fig. 3 is pneumatic three structural schematic diagram of oil draining system embodiment of transformer fault.
Fig. 4 is the pneumatic oil draining system example IV structural schematic diagram of transformer fault.
Fig. 5 is pneumatic five structural schematic diagram of oil draining system embodiment of transformer fault.
Fig. 6 is pneumatic six structural schematic diagram of oil draining system embodiment of transformer fault.
Fig. 7 is the pneumatic structural schematic diagram of oil draining system embodiment seven and eight of transformer fault.
Wherein: control piper, 5-oil extractions are opened in 1-pneumatic draining valve, 2-component pipelines, 3-rupture disks, 4-oil extractions
Control piper is closed, 6-rupture disks open control piper, and 7-reversal valves, 8-oil extraction control valves, 9-rupture disks, which are opened, to be controlled
Valve, 10-pressure reducing valves, 11-gas source main valves, 12-gas sources, 13-pneumostop valves, 14-sealing unlatching control pipers, 15-
Sealing keeps pipeline, 16-sealed change valves, 17-sealing opening controlling valves, 18-fire-retardant gas pipelines, 19-fire-retardant gas
Pipe valve 20-fire-retardant gas cylinder, 21-fire-retardant gas pipeline pneumatic operated valves, 22-fire-retardant gas control valves, 23-oil conservaters are pneumatic
Shutoff valve, 24-oil conservaters shut off control valve, the pneumatic draining valve of 25-oil conservaters, 26-oil conservater oil extraction control valves, 27-light
Electric transducer, 28-pressure sensors.
Specific embodiment
Embodiment one:
As shown in Figure 1, connecting pneumatic draining valve 1 in the oil discharge outlet that transformer primary has accident oil extraction gate valve, pneumatic draining valve 1 goes out
Mouth joined assemblies pipeline 2 and rupture disk 3, the outlet of rupture disk 3 enter underground oil extraction pond by the road；Air inlet is set on component pipeline 2
Mouth simultaneously connects rupture disk unlatching control piper 6 to atmospheric control；Control is opened in the control unit connection oil extraction of pneumatic draining valve 1
Pipeline 4 and oil extraction close control piper 5 to atmospheric control.Atmospheric control is by rupture disk opening controlling valve 9, oil extraction control
Valve 8, reversal valve 7, pressure reducing valve 10, gas source main valve 11, gas source 12 and pipeline and pressure gauge processed form and are mounted on Pneumatic control cabinet
It is interior.Wherein rupture disk opens control piper 6 and is sequentially connected rupture disk opening valve 9, pressure reducing valve 10 and gas source main valve 11, for controlling
Rupture disk is opened；Control piper 4 is opened in oil extraction and oil extraction closes control piper 5 and is respectively connected to reversal valve 7, then the row of being sequentially connected
Oil control valve 8, pressure reducing valve 10 and gas source main valve 11 are opened and closed for controlling pneumatic draining valve.Rupture disk component is by component
Pipeline 2 and rupture disk 3 and clamping flange are constituted, and the pressure that breaks of rupture disk can be set in 0.1~0.3MPa；Pneumatic control cabinet
The other side or other homes, each valve that Auxiliary Transformer Firewall is arranged in can be used manually, and solenoid valve can also be used and match
The electronic remote control of control circuit, gas source 12 is using nitrogen cylinder or dioxide bottle or other inert gas gas cylinders, gas source main valve 11
Connection has barometric pressure reducing valve 10, and sets the air pressure after air gauge monitoring is opened in each gas source branching valve rear end and become
Change.
Piping connection finishes, and pneumatic draining valve 1 is in close state, and rupture disk 3 is in intact sealing state.To pneumatic
1 front end pipeline of draining valve vacuumize or oiling exhaust after, opening transformer primary has an accident oil extraction gate valve, and transformer insulation oil flows into
Pipeline simultaneously keeps sealing by pneumatic draining valve 1.Control piper 4 is opened in oil extraction when transformer operates normally and control is closed in oil extraction
Pipeline 5 and rupture disk are opened without driving air pressure in control piper 6, and gas source main valve 11 is closed, and each branch line valve is closed, pipe
Air gauge equal no pressure in road is shown.Pressure after pressure reducing valve decompression is set in advance in 0.4~0.7MPa, and reversal valve 7 can be hand
It draws valve to be initially set to connection oil extraction and opens control piper 4, i.e., guarantee has drives pneumatic draining valve 1 to open first when air pressure.
When catastrophe failure, which occurs, in transformer needs oil extraction, gas source main valve 11 is first opened, rupture disk is then opened and opens control
Valve 9 processed, air pressure by rupture disk open control piper 6 reach component pipeline 2 in and pressure reach setting break pressure with
Rupture disk pops when upper, is then shut off valve 9, opens oil extraction control valve 8, and air pressure is opened control piper 4 by oil extraction and reached pneumatically
The control unit of draining valve 1 simultaneously drives pneumatic draining valve 1 to open, and transformer realizes oil extraction.If desired pneumatic draining valve 1 is closed, it can
Lead to oil extraction closing control piper 5 to switch reversal valve 7.
Manually opened gas source mode is used in the present embodiment, is to have power-off risk after considering transformer fault, if there is can
Electronic remote control or electronic and parallel manually can be designed to by power supply.In addition, pneumatic draining valve can be ball valve, butterfly valve, gate valve
Etc. types operated pneumatic valve.Pneumatic draining valve, which also can choose, only opens single pneumatic normal closed gate, such as pneumatic stopping valve, diaphragm
Valve etc. drives air supply system that can reduce at this time and supplies all the way.Positive arch may be selected in rupture disk, and other forms also may be selected and be able to satisfy
The metallic membrane or nonmetallic diaphragm that long term seal is required and broken completely under a certain pressure.Storage pressure should be inspected periodically,
2MPa or more (the long Ying Genggao of gas circuit) should be maintained at.
When using automatically controlled and manual bimodulus opening ways, the replacing valve in Pneumatic control cabinet at solenoid valve and had into hand
Dynamic function, automatically controlled signal are provided by scene or Master Control Room, and such mode gas source main valve 11 is answered normally opened and increased behind automatically controlled total
Valve.
Embodiment two:
As shown in Fig. 2, connecting two concatenated pneumatic draining valves 1 and pneumatic close in the outlet that transformer primary has accident oil extraction gate valve
Valve 13 is sealed, the latter can be as previous specification, and acting on is secondary seal, and the outlet of pneumostop valve 13 leads to underground row
Oil sump entrance；The control unit of the gentle seal valve 13 of pneumatic draining valve 1 has pipeline connection to Pneumatic control cabinet, is driven by air pressure
Movable valve is opened.It installs, the gentle seal valve 13 of pneumatic draining valve 1 is in closed state, and sealed change valve 16 leads to
Control piper 14 is opened in sealing；To pneumatic draining valve (1) front end pipeline vacuumize or oiling exhaust after, open transformer primary it is busy
Therefore oil extraction gate valve, transformer insulation oil flow into and through pneumatic draining valve 1 and keep sealing.When catastrophe failure needs occurs in transformer
When oil extraction, gas source main valve 11 is first opened, then opens sealing opening controlling valve 17, the sealed reversal valve 16 of driving air pressure and sealing are opened
The control unit that control piper 14 reaches pneumostop valve 13 is opened, driving pneumostop valve 13 is opened, and then or is opened simultaneously pneumatic
The oil extraction opening controlling valve 8 of draining valve 1, pneumatic draining valve 1 are opened, and transformer realizes oil extraction.
Automatically controlled and manual bimodulus opening ways can also be used, the replacing valve in Pneumatic control cabinet at solenoid valve and is had
There is manual function, automatically controlled signal is provided by scene or Master Control Room, and such mode gas source main valve 11 answers normally opened or increase electronic control main valve
Door.
Embodiment three:
As shown in figure 3, uniformly being communicated with fuel tank internal on the basis of embodiment one or two technical solutions in transformer surrounding
Fire-retardant gas pipeline 18, fire-retardant gas pipeline connect fire-retardant gas cylinder 20 through pressure reducing valve through valve 19, fire-retardant gas can be nitrogen,
Carbon dioxide gas or other inert gases.When transformer catastrophe failure occurs and needs oil extraction, when pneumatic discharge equipment is opened
Afterwards, fire-retardant gas pipe valve 19 is opened, realizes that fire-retardant gas enters inside transformer.
Example IV:
As shown in figure 4, fire-retardant gas pipeline pneumatic operated valve 21 is connected on fire-retardant gas pipeline 18 on the basis of embodiment three,
Fire-retardant gas control valve 22 in the control unit connection driving gas source pipeline to atmospheric control of pneumatic operated valve 21.Go out in transformer
When existing catastrophe failure needs oil extraction, after pneumatic discharge equipment is opened, fire-retardant gas is realized by opening fire-retardant gas control valve 22
Body pipeline pneumatic operated valve 21 is opened, and realizes that fire-retardant gas enters inside transformer.To realize more reliable sealing, fire-retardant gas is prevented
Enter fuel tank when transformer operates normally, two concatenated operated pneumatic valves can be used on fire-retardant gas pipeline.Reversal valve in figure
Effect be realize operated pneumatic valve opening and closing conversion, initial preset is connection valve opening.
Embodiment five:
As shown in figure 5, being connected on the pipeline of transformer oil storage and oil tank of transformer on the basis of embodiment one to four
Pneuamtic shutoff valves 23 can be normally opened pneumatic stopping valve.When there is catastrophe failure in transformer, after pneumatic discharge equipment is opened,
Pneuamtic shutoff valves 23 are closed by the control unit input air pressure to oil conservater pneuamtic shutoff valves 23, realize oil conservater interior insulation oil not
It can inflow transformer.The driving gas source of the operated pneumatic valve can be incorporated to the atmospheric control of pneumatic discharge equipment.
Embodiment six:
On the basis of any technical solution of embodiment one to five, oil storage is connected in the fuel tank lower part of transformer oil storage
The pneumatic draining valve 25 of cabinet and pipeline lead to transformer lower part oil storage pool, which can be normally closed operated pneumatic valve, work as change
After the pneumatic discharge equipment unlatching of catastrophe failure occurs in depressor, by being opened to the control unit input air pressure of the pneumatic draining valve 25 of oil conservater
The pneumatic draining valve 25 of oil conservater is opened, realizes oil conservater interior insulation oil inflow transformer lower part oil storage pool.The driving of the operated pneumatic valve
Gas source can be incorporated to the atmospheric control of pneumatic discharge equipment.
Embodiment seven:
As shown in fig. 7, photoelectric sensor 27 is arranged on oil tank of transformer and acquires in transformer while pressing above-described embodiment four
Portion's lightwave signal, the electric arc light wave and flame light wave that photoelectric sensor 27 is generated inside transformer by light guide acquire concurrent
Signal out, necessary condition one of of the signal as starting transformer oil extraction and note nitrogen, for whether determining pneumatic discharge equipment
It opens, when photoelectric sensor 27 detects flame signal, as one of necessary condition, triggers rupture disk 3 and pneumatic draining valve 1
It opens and fire-retardant gas pipeline pneumatic operated valve 21 is opened.Determine that transformer fault starting oil extraction and the necessary condition for infusing nitrogen have four at present
, i.e., the movement of Transformer Gas Relay grave gas, pressure relief valve unlatching, circuit breaker trip and transformer top temperature-sensitive sense
Device triggering.Increase this programme detection inside transformer lightwave signal or transformer top temperature sensing sensor is changed into detection transformation
The photoelectric sensor of lightwave signal, can more reliably detect inside transformer risk inside device, more accurately determine oil extraction and note
Whether nitrogen system, which needs, is opened.400 DEG C of satisfaction detection or more high-temperature infrared ray, visible light and ultraviolet light can be used in photoelectric sensor
Photo-electric conversion element or optoelectronic switch.
Embodiment eight:
As shown in fig. 7, pressure sensor 28 is arranged on oil tank of transformer and acquires in transformer while pressing above-described embodiment four
Portion's pressure signal, 28 connection oil tank of transformer built-in electrical insulation oil of pressure sensor detects oil pressure, when inside transformer oil pressure reaches
(oil tank of transformer allowable pressure, fuel tank have cracking risk) issues signal when dangerous pressure value, and the signal is as starting transformer
One of the necessary condition of oil extraction and note nitrogen, for determining whether pneumatic discharge equipment is opened.The conventionally used pressure of transformer at present
The starting pressure of power relief valve is 55KPa, and the pressure sensor in the present embodiment is settable to provide row when detecting higher pressure
Oil and note nitrogen enabling signal, consider oil tank of transformer design strength, can be selected according to different transformers and mounting height
Setting condition of the 60KPa-100KPa as pressure sensor, i.e., when pressure sensor 28 detects 60KPa and pressure above,
As one of necessary condition, triggers rupture disk 3 and pneumatic draining valve 1 is opened and fire-retardant gas pipeline pneumatic operated valve 21 is opened.At present
Determine that transformer fault starting oil extraction and the necessary condition for infusing nitrogen have four, the i.e. movement of Transformer Gas Relay grave gas, pressure
Power relief valve is opened, circuit breaker trip and transformer top temperature sensing sensor trigger.Increase pressure sensing in this programme embodiment
Device detects this necessary condition of dangerous pressure value, can more reliably hold equipment Risk, more safely judgement oil extraction and note nitrogen system
Whether system should be opened.Detection range can be used in the commercially available pressure sensor of 1MPa or less or pressure switch in pressure sensor.
Claims (10)
1. a kind of pneumatic oil draining system of transformer fault, it is characterised in that: transformer oil discharge outlet be connected to pneumatic discharge equipment and
Control the atmospheric control of pneumatic discharge equipment；Pneumatic discharge equipment is made of pneumatic draining valve series shot-firing piece component, or
It is made of two concatenated pneumatic gentle seal valves of draining valve；Control each road gas that pneumatic draining valve is opened and rupture disk pops
Dynamic control piper is connected to atmospheric control, atmospheric control be by oil extraction control valve, rupture disk control valve, pressure gauge and
The Pneumatic control cabinet form that gas source is constituted.
2. the pneumatic oil draining system of transformer fault as described in claim 1, it is characterised in that: connect gas in transformer oil discharge outlet
Dynamic draining valve (1), the outlet joined assemblies pipeline (2) and rupture disk (3) of pneumatic draining valve (1), the outlet of rupture disk (3) is by the road
Into underground oil extraction pond；Air inlet is set on component pipeline (2) and connects rupture disk and opens control piper (6) to pneumatic control system
System；Control piper (4) are opened in the control unit connection oil extraction of pneumatic draining valve (1) and oil extraction closes control piper (5) to pneumatic control
System processed；Wherein rupture disk opens control piper (6) and is sequentially connected rupture disk opening controlling valve (9), pressure reducing valve (10) and gas source
Main valve (11) is opened for controlling rupture disk；Control piper (4) are opened in oil extraction and oil extraction is closed control piper (5) and is separately connected
To reversal valve (7), then it is sequentially connected oil extraction control valve (8), pressure reducing valve (10) and gas source main valve (11), for controlling pneumatic oil extraction
Valve opens and closes.
3. the pneumatic oil draining system of transformer fault as claimed in claim 1 or 2, it is characterised in that: oil tank of transformer is connected to
Fire-retardant gas pipeline (18) is connected to the total valve of fire-retardant gas cylinder (20) through fire-retardant gas pipe valve (19) and pressure reducing valve.
4. the pneumatic oil draining system of transformer fault as claimed in claim 3, it is characterised in that: oil tank of transformer is connected to fire-retardant
Gas piping (18), fire-retardant gas pipeline (18) are equipped with fire-retardant gas pipeline pneumatic operated valve (21), fire-retardant gas pipeline pneumatic operated valve
(21) control unit connecting line is to atmospheric control, and the fire-retardant gas control valve by being arranged in atmospheric control
(22) it controls.
5. the pneumatic oil draining system of transformer fault as described in claim 1, it is characterised in that: the oil conservater in portion on the transformer
Oil conservater pneuamtic shutoff valves (23) are connected on export pipeline, the control unit connecting lines of oil conservater pneuamtic shutoff valves (23) is to pneumatic
Control system, oil conservater pneuamtic shutoff valves (23) by the oil conservater being arranged in atmospheric control shut off control valve (24) control
System.
6. the pneumatic oil draining system of transformer fault as described in claim 1, it is characterised in that: the oil conservater in portion on the transformer
The pneumatic draining valve of oil conservater (25) are connected on export pipeline, the control unit connecting line of the pneumatic draining valve of oil conservater (25) is to pneumatic
Control system, the pneumatic draining valve of oil conservater (25) are controlled by the oil conservater oil extraction control valve (26) being arranged in atmospheric control
System.
7. the control method of the pneumatic oil draining system of transformer fault as claimed in claim 2, it is characterised in that including following step
It is rapid:
1) transformer normal operating condition: pneumatic draining valve (1) is in close state, and rupture disk (3) is in intact seal shape
State, rupture disk opens control piper (6) and oil extraction opens control piper (4) and is connected to atmospheric control, but pneumatic control system
System is without providing air pressure；
2) transformer failure needs oil extraction: providing air pressure by atmospheric control, first opens control piper to rupture disk
(6) injection air pressure allows rupture disk to pop in, then opens injection air pressure in control piper (4) to oil extraction and allows pneumatic draining valve (1)
It opens, transformer realizes oil extraction.
8. the control method of the pneumatic oil draining system of transformer fault as claimed in claim 4, it is characterised in that including following step
It is rapid:
1) transformer normal operating condition: fire-retardant gas pipeline pneumatic operated valve (21) is in close state, fire-retardant gas control valve
(22) it is in close state；
2) transformer failure needs oil extraction: providing air pressure by atmospheric control, first opens rupture disk (3) or pneumatic close
It seals valve (13), is then turned on pneumatic draining valve (1), transformer starts oil extraction, then opens fire-retardant gas control valve (22), allows gas
Pressure driving fire-retardant gas pipeline pneumatic operated valve (21) is opened, and is realized and is injected fire-retardant gas into transformer.
9. the control method of the pneumatic oil draining system of transformer fault as described in claim 7 and 8, it is further characterized in that: becoming
It is provided with photoelectric sensor on depressor, for detecting optical signal inside oil tank of transformer, and the photoelectric sensor is detected into fire
The necessary condition that optical signal is opened as oil extraction and note nitrogen pipeline.
10. the control method of the pneumatic oil draining system of transformer fault as described in claim 7 and 8, it is further characterized in that: becoming
It is provided with pressure sensor on depressor, detects 60KPa for detecting oil tank of transformer internal pressure, and by the pressure sensor
And the necessary condition that pressure above is opened as oil extraction and note nitrogen pipeline.
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