CN107731474A - The Novel respirator and its automatic alarm prompt system of a kind of transformer - Google Patents
The Novel respirator and its automatic alarm prompt system of a kind of transformer Download PDFInfo
- Publication number
- CN107731474A CN107731474A CN201711000212.XA CN201711000212A CN107731474A CN 107731474 A CN107731474 A CN 107731474A CN 201711000212 A CN201711000212 A CN 201711000212A CN 107731474 A CN107731474 A CN 107731474A
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- China
- Prior art keywords
- breathing
- transformer
- air
- respirator
- oxygen concentration
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present invention relates to the Novel respirator of transformer and its automatic alarm prompt system, including humidity sensor, breathing equipment, breathing bag, oxygen concentration sensor, deaerating plant and breather cheek valve, also include cable, numerical value display module, control module, measure and control device, dispatch data net and scheduling etc., energy-conserving and environment-protective can be realized, automatically controlled, the effect of remotely monitor, the humidity and oxygen concentration to respirator carry out instruction alarm.
Description
Technical field
The invention belongs to field transformer, more particularly to the Novel respirator of transformer and its automatic alarm prompt system.
Background technology
Respirator is a safety guard of oil-immersed power transformer, is installation for transformer air chamber and ambient atmos
What is exchanged must be through barrier, filled with adsorbent inside it.Respirator mainly has two aspect functions：1, make in transformer body air with it is outer
Boundary connects；2, by the built-in adsorbent of respirator (drier) absorption air moisture, prevent humid air to be directly entered conservator, drop
Low or destruction oil-insulation intensity.Decline when transformer temperature reduces oil level, transformer sucks gas by respirator, and gas first passes through
Oil sealing, the i.e. lubricating cup equipped with transformer oil are crossed, oil sealing filters out koniology impurity, becomes clean gas.
Normally dry breathing agent is blue silica gel, when silica gel color is changed into pink, show silica gel in wet condition and
Failure；When the silica gel that changes colour is up to 2/3, operations staff should notify maintainer to change.Generally, the discoloration of silica gel is very
Slowly, but when running environment exception, mounting process and product quality go wrong, the discoloration of the silica gel moisture absorption is accelerated, or even becomes
There is phenomena such as abnormal in color process.At this moment we will carry out trouble hunting to transformer, while change silica gel.
The transformer now run is all the damp degree that silica gel is embodied by the situation of change of silica gel color, and transformer station
It is substantially unattended, only maked an inspection tour by operations staff, respirator abnormal conditions can not be found in time, and color change is ratio
Relatively fuzzy parameter, it is not easy to personnel inspection, monitoring.
In addition, the adsorbent in transformer breather can only adsorb the moisture in air, and oxygen and transformation in air
Device oil Long Term Contact, transformer oil is set to produce some sediments in acidity, be deposited in winding surface and heat radiation oil duct, reduce
The insulation of winding and obstruction oil duct, the heat-sinking capability of transformer is reduced, and then transformer will carry out downrating.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of novel transformer respirator, it is possible to achieve
Energy-conserving and environment-protective, automatically control, the effect of remotely monitor, the humidity and oxygen concentration to respirator carry out instruction alarm.
The technical scheme that uses to achieve the above object of the present invention is：A kind of Novel respirator of transformer passes including humidity
Sensor, breathing equipment, breathing bag, oxygen concentration sensor, deaerating plant and breather cheek valve, wherein humidity sensor are set
At the top of breathing equipment, for monitoring the degree of drying of air in inspiration transformer, oxygen concentration sensor is arranged at deoxygenation
The top of device, for removing the oxygen in inspiration air, breathing equipment bottom is connected by conduit with deaerating plant, in conduit
Portion is arranged with breathing bag, offers multiple stomatas being arranged breathing bag section, check valve, air-breathing list are provided with conduit bottom
Can only be from air-breathing inward outside to valve, and it is unable to exhaled gas；When needing air-breathing, air enters via deaerating plant, passes through successively
Oxygen concentration sensor, conduit, pressure of inspiration(Pi) valve, breathing equipment and humidity sensor is crossed to enter in transformer；When needing to breathe out
During gas, gas is stored in air bag via breathing equipment and conduit, so that next time reuses, so as to reduce inspiration air
Amount, when inspiration gas flow is more than the figure gas flow stored in air bag, remaining air need to be sucked by breather cheek valve, is breathed
The setting of air bag serves the reuse to deoxygenation dry gas, saves the energy, reduces the loss of equipment；
A kind of automatic alarm prompt system of the Novel respirator of transformer includes humidity sensor, breathing equipment, breathing
Air bag, oxygen concentration sensor, deaerating plant and breather cheek valve, in addition to cable, numerical value display module, control module, survey
Device, dispatch data net and scheduling are controlled, humidity sensor and oxygen concentration sensor are connected to numerical value respectively and show mould by cable
Block and control module, the dispatch data net connection measure and control device 9 and scheduling, numerical value display module and control module form main transformer
Observing and controlling screen, measure and control device form public observing and controlling screen, and main transformer observing and controlling screen and public observing and controlling screen are arranged in control room, the scheduling
It is arranged in control room；The humidity of adsorbent, is converted to electric signal, through cable by humidity in humidity sensor detecting breathing device
The numerical value display module and control module of control room are transferred to, when numerical value exceedes threshold value, control module is transmitted messages to measure and control device
Signal is uploaded to scheduling by alert signal, measure and control device by dispatch data net, and finally, dispatcher notifies maintenance department to breathing
Device carries out malfunction elimination；Oxygen concentration sensor detects the concentration of oxygen in inspiration air in deaerating plant, and oxygen concentration is turned
Electric signal is changed to, numerical value display module and control module through cable transmission to control room, when numerical value exceedes threshold value, controls mould
Block sends out alarm signal to measure and control device, and signal is uploaded to scheduling by measure and control device by dispatch data net, and finally, dispatcher is led to
Know that maintenance department carries out malfunction elimination to the deaerating plant of respirator；
Silica gel, calcium chloride, cobalt chloride etc. can be selected in the drier used in described breathing equipment；
Pressure relief valve can be set on the air bag, when the gas stored in air bag it is excessive when, gas pressure exceedes
Certain pressure value, pressure relief valve are opened, and portion gas are discharged, to maintain airbag safety to work；
The oxygen scavenger used in described deaerating plant can be inorganic deoxidier, DMKO, preferably use sponge iron；
Except using cable and dispatch data net in the automatic alarm prompt system of the Novel respirator of described transformer
Wire transmission pattern, also can use be wirelessly transferred form, only wireless launcher and receiver need to be installeds in each equipment so that
Simplify route arrangement, improve operating efficiency.
The beneficial effects of the invention are as follows：Set by the air bag of novel transformer respirator, the drier allowed in respirator
Relatively long air-tight state is kept, avoids steam long-time contact drying agent in air, improves the service life of drier,
And with external oxygen relative insulation oxygen can be prevented to extend the service life of transformer oil from entering inside transformer, drop
Low maintenance cost；This warning system carries out intelligent design to the breathing equipment of transformer, utilizes humidity sensor and long-range report
Alert technology, oxygen content is monitored in real time in the failure, air drying capability and air to drier, empty in timely discovering device
Air humidity degree and oxygen concentration change, ensure the normal operation of equipment；The alarm system is dense by humidity sensor and oxygen
Each concentration information is transferred to the monitoring module in Control Room, monitoring module real-time display humidity value and oxygen concentration by degree sensor
Value, when humidity is higher than critical value, the moisture signal can be used as control signal, start scheduling in time, remind staff in time
Drier or oxygen scavenger are changed, reduces accident rate, reduces equipment property loss.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Reference：Humidity sensor 1, breathing equipment 2, breathing bag 3, oxygen concentration sensor 4, deaerating plant 5, electricity
Cable 6, numerical value display module 7, control module 8, measure and control device 9, dispatch data net 10, scheduling 11, breather cheek valve 12.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes.Based on the embodiment in the present invention, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belongs to the scope of protection of the invention.
As shown in figure 1, the Novel respirator of transformer includes humidity sensor 1, breathing equipment 2, breathing bag 3, oxygen
Concentration sensor 4, deaerating plant 5 and breather cheek valve 12, wherein humidity sensor 1 are arranged on the top of breathing equipment 2, are used for
The degree of drying of air in inspiration transformer is monitored, oxygen concentration sensor 4 is arranged at the top of deaerating plant 5, for removing
Oxygen in inspiration air, the bottom of breathing equipment 2 are connected by conduit with deaerating plant 5, and breathing bag is arranged with the middle part of conduit
3, multiple stomatas are offered being arranged 3 sections of breathing bag, are provided with check valve in conduit bottom, breather cheek valve 12 can only be from outer
Air-breathing inward, and it is unable to exhaled gas；When needing air-breathing, air enters via deaerating plant 5, is passed successively by oxygen concentration
Sensor 4, conduit, pressure of inspiration(Pi) valve 12, breathing equipment 2 and humidity sensor 1 enter in transformer；When needing exhaled gas,
Gas is stored in air bag via breathing equipment 2 and conduit, so that next time reuses, so as to reduce inspiration air capacity, works as suction
When entering gas flow more than the figure gas flow stored in air bag, remaining air need to be sucked by breather cheek valve 12, air bag is set
The reuse served to deoxygenation dry gas is put, the energy is saved, reduces the loss of equipment；
As shown in figure 1, the automatic alarm prompt system of the Novel respirator of transformer includes humidity sensor 1, breathing dress
2, breathing bag 3, oxygen concentration sensor 4, deaerating plant 5 and breather cheek valve 12 are put, in addition to cable 6, numerical value show mould
Block 7, control module 8, measure and control device 9, dispatch data net 10 and scheduling 11, the cable 6 is respectively by humidity sensor 1 and oxygen
Concentration sensor 4 is connected to numerical value display module 7 and control module 8, and the dispatch data net 10 connects measure and control device 9 and scheduling
11, numerical value display module 7 and control module 8 form main transformer observing and controlling screen, and measure and control device 9 forms public observing and controlling screen, main transformer observing and controlling screen
It is arranged at public observing and controlling screen in control room, the scheduling 11 is arranged in control room；The detecting breathing device of humidity sensor 1
The humidity of adsorbent in 2, electric signal is converted to by humidity, and the numerical value display module 7 and control mould of control room are transferred to through cable 6
Block 8, when numerical value exceedes threshold value, control module 8 sends out alarm signal to measure and control device 9, and measure and control device 9 passes through dispatch data net 10
Signal is uploaded into scheduling 11, finally, dispatcher notifies maintenance department to carry out malfunction elimination to respirator；Oxygen concentration senses
Device 4 detects the concentration of oxygen in inspiration air in deaerating plant 2, and oxygen concentration is converted into electric signal, control is transferred to through cable 6
The numerical value display module 7 and control module 8 of room processed, when numerical value exceedes threshold value, control module 8 sends out alarm signal to measure and control device 9
Number, signal is uploaded to scheduling 11 by measure and control device 9 by dispatch data net 10, and finally, dispatcher notifies maintenance department to exhaling
The deaerating plant of haustorium carries out malfunction elimination；
Silica gel, calcium chloride, cobalt chloride etc. can be selected in the drier used in described breathing equipment 2；
Pressure relief valve can be set on the air bag 3, when the gas stored in air bag it is excessive when, gas pressure exceedes
Certain pressure value, pressure relief valve are opened, and portion gas are discharged, to maintain airbag safety to work；
The oxygen scavenger used in described deaerating plant 5 can be inorganic deoxidier, DMKO, preferably use sponge
Iron；
Except using cable 6 and dispatch data net in the automatic alarm prompt system of the Novel respirator of described transformer
10 wire transmission pattern, it can also use and be wirelessly transferred form, wireless launcher and receiver only need to be installed in each equipment, from
And simplify route arrangement, improve operating efficiency.
Above-described embodiment is in the art the purpose is to be to allow simply to illustrate that the technical concepts and features of the present invention
Those of ordinary skill can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent change or modification according to made by the essence of present invention, should all covers within the scope of the present invention.
Claims (9)
1. a kind of Novel respirator of transformer, it includes humidity sensor (1), breathing equipment (2), breathing bag (3), oxygen
Concentration sensor (4), deaerating plant (5) and breather cheek valve (12), wherein the humidity sensor (1) is arranged on the breathing
The top of device (2), for monitoring the degree of drying of air in inspiration transformer, the oxygen concentration sensor (4) is arranged at
The top of the deaerating plant (5), for removing the oxygen in inspiration air, breathing equipment (2) bottom by conduit with
The deaerating plant (5) is connected, and is arranged with breathing bag (3) in the middle part of conduit, be arranged the breathing bag (3) section offer it is more
Individual stomata, is provided with the breather cheek valve (12) in conduit bottom, the breather cheek valve (12) can only from air-breathing inward outside,
And it is unable to exhaled gas.
2. a kind of Novel respirator of transformer according to claim 1, when needing air-breathing, air is via the deoxygenation
Device (5) enters, and is passed successively by oxygen concentration sensor (4), conduit, pressure of inspiration(Pi) valve (12), breathing equipment (2) and humidity
Sensor (1) enters in transformer；When needing exhaled gas, gas is stored in air bag via breathing equipment (2) and conduit, with
Just next time, suction used, and so as to reduce inspiration air capacity, when inspiration gas flow is more than the gas flow stored in air bag, need to pass through
Breather cheek valve (12) sucks remaining air.
3. a kind of Novel respirator of transformer according to claim 1, the drier that is used in described breathing equipment 2
Silica gel, calcium chloride, cobalt chloride etc. can be selected.
4. a kind of Novel respirator of transformer according to claim 1, pressure can be set to discharge on the air bag 3
Valve, when the gas stored in air bag it is excessive when, gas pressure exceedes certain pressure value, and pressure relief valve is opened, and discharges part
Gas, to maintain airbag safety to work.
5. a kind of Novel respirator of transformer according to claim 1, the oxygen scavenger that is used in described deaerating plant 5
It can be inorganic deoxidier, DMKO, preferably use sponge iron.
6. a kind of automatic alarm prompt system of the Novel respirator of any one of claim 1-5 transformer, the system include
Humidity sensor (1), breathing equipment (2), breathing bag (3), oxygen concentration sensor (4), deaerating plant (5) and air-breathing are unidirectional
Valve (12), in addition to cable (6), numerical value display module (7), control module (8), measure and control device (9), dispatch data net (10) and
Dispatch (11), the humidity sensor (1) and the oxygen concentration sensor (4) are connected to described by the cable (6) respectively
Numerical value display module (7) and the control module (8), the dispatch data net (10) connect the measure and control device (9) and described
Dispatch (11), the numerical value display module (7) and the control module (8) form main transformer observing and controlling screen, measure and control device (9) structure
Into public observing and controlling screen, the main transformer observing and controlling screen and the public observing and controlling screen are arranged in control room, and the scheduling (11) is set
In control room.
7. the automatic alarm prompt system of the Novel respirator of transformer according to claim 6, the humidity sensor
(1) humidity of the interior adsorbent of the breathing equipment (2) is detected, humidity is converted into electric signal, control is transferred to through the cable (6)
The numerical value display module (7) of room processed and the control module (8), when numerical value exceedes threshold value, the control module (8) to
The measure and control device (9) sends out alarm signal, and signal is uploaded to the tune by the measure and control device (9) by dispatch data net (10)
Spend (11), finally, dispatcher notifies maintenance department to carry out malfunction elimination to respirator.
8. the automatic alarm prompt system of the Novel respirator of transformer according to claim 6, the oxygen concentration passes
Sensor (4) detects the concentration of oxygen in the interior inspiration air of deaerating plant (2), oxygen concentration is converted into electric signal, through institute
The numerical value display module (7) and the control module (8) that cable (6) is transferred to control room are stated, when numerical value exceedes threshold value,
The control module (8) sends out alarm signal to the measure and control device (9), and the measure and control device (9) passes through the dispatch data net
(10) signal is uploaded into the scheduling (11), finally, dispatcher notifies maintenance department to carry out the deaerating plant of respirator
Malfunction elimination.
9. the automatic alarm prompt system of the Novel respirator of the transformer according to claim any one of 6-8, except adopting
With the wire transmission pattern of the cable (6) and the dispatch data net (10), it can also use and be wirelessly transferred form, only need to be each
Wireless launcher and receiver are installed in equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711000212.XA CN107731474A (en) | 2017-10-24 | 2017-10-24 | The Novel respirator and its automatic alarm prompt system of a kind of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711000212.XA CN107731474A (en) | 2017-10-24 | 2017-10-24 | The Novel respirator and its automatic alarm prompt system of a kind of transformer |
Publications (1)
| Publication Number | Publication Date |
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| CN107731474A true CN107731474A (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711000212.XA Pending CN107731474A (en) | 2017-10-24 | 2017-10-24 | The Novel respirator and its automatic alarm prompt system of a kind of transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987060A (en) * | 2018-08-03 | 2018-12-11 | 安徽柒海智能控制技术有限公司 | A kind of transformer breather and its operation method |
| DE102018213341A1 (en) * | 2018-08-08 | 2020-02-13 | Siemens Aktiengesellschaft | Determination of the moisture input in a drying agent for transformers |
| CN110869105A (en) * | 2018-06-12 | 2020-03-06 | 株式会社 Klt | Multifunctional ventilation device |
| CN111275124A (en) * | 2020-02-10 | 2020-06-12 | 国网河南省电力公司检修公司 | Transformer respirator detection method, classification model construction method, computer readable medium and transformer respirator monitoring system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0244654A (en) * | 1988-08-04 | 1990-02-14 | Fuji Electric Co Ltd | Gas replacement method for fuel cell |
| CN101440344A (en) * | 2007-11-20 | 2009-05-27 | 张衍栋 | Methane storage and circulation device for small-sized methane tank |
| CN102588725A (en) * | 2012-02-06 | 2012-07-18 | 四川热力方程科技有限公司 | Oil tank with forcedly-venting function and application thereof |
| CN204910393U (en) * | 2015-08-21 | 2015-12-30 | 武汉励合生物医药科技有限公司 | Oxygen concentration , atmospheric pressure, humidity adjustable breathing machine |
| CN105355379A (en) * | 2015-11-25 | 2016-02-24 | 国网河南新野县供电公司 | Breathing device and method for oil-immersed distribution transformer |
-
2017
- 2017-10-24 CN CN201711000212.XA patent/CN107731474A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0244654A (en) * | 1988-08-04 | 1990-02-14 | Fuji Electric Co Ltd | Gas replacement method for fuel cell |
| CN101440344A (en) * | 2007-11-20 | 2009-05-27 | 张衍栋 | Methane storage and circulation device for small-sized methane tank |
| CN102588725A (en) * | 2012-02-06 | 2012-07-18 | 四川热力方程科技有限公司 | Oil tank with forcedly-venting function and application thereof |
| CN204910393U (en) * | 2015-08-21 | 2015-12-30 | 武汉励合生物医药科技有限公司 | Oxygen concentration , atmospheric pressure, humidity adjustable breathing machine |
| CN105355379A (en) * | 2015-11-25 | 2016-02-24 | 国网河南新野县供电公司 | Breathing device and method for oil-immersed distribution transformer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110869105A (en) * | 2018-06-12 | 2020-03-06 | 株式会社 Klt | Multifunctional ventilation device |
| CN108987060A (en) * | 2018-08-03 | 2018-12-11 | 安徽柒海智能控制技术有限公司 | A kind of transformer breather and its operation method |
| CN108987060B (en) * | 2018-08-03 | 2021-01-12 | 安徽柒海智能控制技术有限公司 | Transformer respirator and operation method thereof |
| DE102018213341A1 (en) * | 2018-08-08 | 2020-02-13 | Siemens Aktiengesellschaft | Determination of the moisture input in a drying agent for transformers |
| CN111275124A (en) * | 2020-02-10 | 2020-06-12 | 国网河南省电力公司检修公司 | Transformer respirator detection method, classification model construction method, computer readable medium and transformer respirator monitoring system |
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Application publication date: 20180223 |