CN116435060A - Maintenance-free moisture absorber of power transformer and operation control method thereof - Google Patents
Maintenance-free moisture absorber of power transformer and operation control method thereof Download PDFInfo
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- CN116435060A CN116435060A CN202310566506.8A CN202310566506A CN116435060A CN 116435060 A CN116435060 A CN 116435060A CN 202310566506 A CN202310566506 A CN 202310566506A CN 116435060 A CN116435060 A CN 116435060A
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- 238000010521 absorption reaction Methods 0.000 claims abstract description 78
- 238000007791 dehumidification Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002274 desiccant Substances 0.000 claims description 56
- 238000001035 drying Methods 0.000 claims description 43
- 239000000919 ceramic Substances 0.000 claims description 37
- 239000002184 metal Substances 0.000 claims description 34
- 239000011521 glass Substances 0.000 claims description 32
- 238000001914 filtration Methods 0.000 claims description 22
- 239000012535 impurity Substances 0.000 claims description 9
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 238000005457 optimization Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a maintenance-free moisture absorber of a power transformer and an operation control method thereof; the maintenance-free moisture absorber of the power transformer comprises main moisture absorbing equipment and auxiliary moisture absorbing equipment which are communicated through a first electromagnetic valve; the main moisture absorption equipment and the auxiliary moisture absorption equipment are internally provided with an exhaust fan and a heating component; the air outlet of the main moisture absorption equipment is provided with a connecting flange which is used for being connected with a transformer oil pillow, and a temperature and humidity sensor is arranged in the connecting flange; and a second electromagnetic valve is arranged at the air inlet of the auxiliary moisture absorption equipment. During the use, provide the dry air for transformer oil pillow through main moisture absorption equipment earlier, when the drier in main moisture absorption equipment temporarily loses the ability of absorbing water and is saturation, carry out heating dehumidification to the drier automatically and handle for the drier can reuse, opens first solenoid valve and second solenoid valve at heating dehumidification in-process simultaneously, provides the dry air for transformer oil pillow through supplementary moisture absorption equipment, and dehumidification efficiency is high, dehumidification is effectual.
Description
Technical Field
The invention relates to the technical field of transformer moisture absorbers, in particular to a maintenance-free moisture absorber of a power transformer and an operation control method thereof.
Background
The moisture absorber is an important protection component of the power transformer, and has the function of removing and drying sundries and moisture in the air entering the transformer (or transformer) oil storage tank due to the change of the transformer oil temperature so as to maintain the insulation strength of the transformer oil and ensure that the transformer can reliably operate for a long time.
Maintenance-free dehydrators in the prior art generally comprise a filter device, a heating device and an exhaust fan; the filter device is arranged at the air inlet of the dehumidifier, the heating device is used for drying the drying agent, and the exhaust fan is used for exhausting the water vapor generated in the drying process. When the transformer is used, the transformer and the mutual inductor breathe through the maintenance-free moisture absorber, impurities in the air are filtered by the filtering device, and moisture in the air is absorbed by a drying agent in the moisture absorber; when the humidity in the moisture absorber reaches a set value, the heating device starts to dry the drying agent, and the exhaust fan starts to exhaust water vapor, so that the drying agent recovers the moisture absorption function.
However, in the existing maintenance-free moisture absorber, as the air inlet is provided with the filtering device, the air inlet has smaller gap and larger resistance, the filtering device is of a fixed structure, the position of the filtering device is not adjustable, so that water vapor is difficult to discharge in the drying process, and the drying efficiency is low; in addition, the maintenance-free moisture absorber is only provided with an air inlet and an air outlet, so that the exhaust fan is difficult to completely exhaust the water vapor in the system pipeline during drying, the drying agent is caused to absorb the water vapor which is not exhausted in time after drying, the service life of the drying agent is shortened, and partial water vapor is easily caused to enter the oil storage cabinet to influence the working safety of the transformer.
Disclosure of Invention
In order to overcome the problems in the prior art, the application provides a maintenance-free moisture absorber for a power transformer. According to the maintenance-free dehydrator for the power transformer, the heating component is arranged in the main moisture absorption equipment, so that the drying agent can be dried after being fully used for a long time, the drying agent can be repeatedly used, the service life of the drying agent is prolonged, the maintenance-free purpose of the dehydrator is achieved, and moisture in the main moisture absorption equipment can be discharged in the drying process by arranging the exhaust fan, the drying time of the heating component is shortened, and the dehumidification efficiency is improved; simultaneously, through connecting an auxiliary moisture absorption device with the same structure on the main moisture absorption device, dry air can be provided for the transformer oil pillow in the drying process, the drying agent in the main moisture absorption device is prevented from absorbing the evaporated water vapor again in the drying process, and the dehumidification effect is improved. Correspondingly, the invention also discloses an operation control method of the maintenance-free moisture absorber of the power transformer.
For the moisture absorber, the technical scheme of the application is as follows:
the maintenance-free moisture absorber of the power transformer comprises main moisture absorbing equipment, auxiliary moisture absorbing equipment and a controller; the main moisture absorption device comprises an A transparent glass cover; an upper cover and a lower cover are respectively arranged at two ends of the transparent glass cover A; an air outlet A is formed in the upper cover A, and an air inlet A is formed in the lower cover A; the inside of the transparent glass cover A is provided with a drying agent for drying the entering air, and the heating component A is used for drying the drying agent; an A exhaust fan is arranged in the A upper cover; the air inlet A is provided with a filtering device A for filtering impurities in the entering air; a connecting flange is arranged at the air outlet of the A; the connecting flange is used for being connected with the transformer oil conservator so that the inside of the main moisture absorption equipment is communicated with the inside of the transformer oil conservator; a temperature and humidity sensor is arranged in the connecting flange; the auxiliary moisture absorption device comprises a transparent glass cover B; the two ends of the transparent glass cover B are respectively provided with an upper cover B and a lower cover B; the upper cover B is provided with an air outlet B, and the lower cover B is provided with an air inlet B; the inside of the transparent glass cover B is provided with a drying agent for drying the entered air, and the heating component B is used for drying the drying agent; the air inlet of the B is provided with a filtering device B and a second electromagnetic valve; the filtering device B is positioned at the inner side of the second electromagnetic valve and is used for filtering impurities in the entering air; a B exhaust fan is arranged in the B upper cover; a first electromagnetic valve is connected between the air outlet A and the air outlet B and is used for communicating the main moisture absorption equipment and the auxiliary moisture absorption equipment; the heating assembly A, the heating assembly B, the air exhaust fan A, the air exhaust fan B, the temperature and humidity sensor, the first electromagnetic valve and the second electromagnetic valve are respectively and electrically connected with the controller.
Compared with the prior art, the maintenance-free moisture absorber of the power transformer comprises the main moisture absorbing equipment and the auxiliary moisture absorbing equipment which are communicated with each other and have specific structures, and the power transformer has the advantages of high dehumidification efficiency and good dehumidification effect; the transformer oil conservator mainly breathes freely through main moisture absorption equipment, a heating component and an exhaust fan are arranged in the main moisture absorption equipment, the heating component is used for heating and drying a drying agent after the drying agent is fully used for a long time, so that the drying agent can be repeatedly used, the service life of the drying agent is prolonged, the maintenance-free purpose of the moisture absorber is achieved, the exhaust fan is used for blowing out moisture in the main moisture absorption equipment in the drying process, the drying time of the heating component is shortened, and the dehumidification efficiency is improved; the auxiliary moisture absorption equipment is used for providing dry air for the transformer oil pillow when the main moisture absorption equipment dries the drying agent in the main moisture absorption equipment, so that the drying agent in the main moisture absorption equipment can be prevented from absorbing evaporated water vapor again in the drying process, and the dehumidification effect of the drying agent is improved; in addition, the inside of auxiliary moisture absorption equipment also is equipped with heating element and exhaust fan for drying dehumidification to the drier of inside for the drier can reuse, long service life.
As optimization, in the maintenance-free moisture absorber of the power transformer, the filtering device A comprises a ceramic filter sheet A and a spring A; the two sides of the ceramic filter sheet A are connected with the lower cover A through a rotating shaft and can rotate relative to the lower cover A; one end of the A spring is fixedly connected with the upper surface of the A ceramic filter disc, and the other end of the A spring is fixedly connected with the A lower cover; the B filter device comprises a B ceramic filter disc and a B spring; the two sides of the ceramic filter sheet B are connected with the lower cover B through a rotating shaft and can rotate relative to the lower cover B; one end of the B spring is fixedly connected with the upper surface of the B ceramic filter disc, and the other end of the B spring is fixedly connected with the B lower cover. When the air exhaust fan works, the ceramic filter disc is driven by the suction force of the air exhaust fan to rotate around the rotating shaft, so that a gap is formed between the ceramic filter disc and the inner wall of the lower cover, air circulation is smoother, and drying efficiency of the drying agent is further improved; when the exhaust fan does not work, the ceramic filter sheet resets under the action of spring force, so that impurities can not enter the transformer oil pillow along with air when the transformer oil pillow breathes.
As an optimization, in the maintenance-free moisture absorber of the power transformer, the heating component a comprises a metal mesh enclosure and end covers arranged at two ends of the metal mesh enclosure; the metal mesh enclosure is filled with a drying agent; an axial breathing tube is arranged at the central position of the metal mesh enclosure, and a heating resistance wire is arranged between the axial breathing tube and the metal mesh enclosure; the structure of the heating component B is the same as that of the heating component A. The heating component adopts the structure, is convenient to assemble and is easy to implement. Further, a group of brackets are uniformly arranged on the outer surface of the axial breathing tube along the circumferential direction and are used for installing heating resistance wires. Therefore, the drying agent can be heated uniformly in the drying process.
As optimization, in the maintenance-free moisture absorber of the power transformer, the bottom of the lower cover A is provided with a C exhaust fan; and a D exhaust fan is arranged at the bottom of the first electromagnetic valve. When drying the drier, blow out the inside moisture of moisture absorption equipment through two exhaust fans, dehumidification effect is better. Further, a bottom cover A is sleeved outside the exhaust fan C, and a plurality of air inlet holes A are formed in the bottom of the bottom cover A; and a B bottom cover is sleeved outside the D exhaust fan, and a plurality of B air inlet holes are formed in the bottom of the B bottom cover. The bottom cover can play a protective role, prevent the exhaust fan from being polluted by dust and influence the exhaust efficiency.
As optimization, in the maintenance-free moisture absorber of the power transformer, an a metal outer cover is arranged outside the a transparent glass cover, and a plurality of a observation holes are formed in the surface of the a metal outer cover; the outside of B transparent glass cover is equipped with B metal housing, the surface of B metal housing is equipped with a plurality of B observation holes. The metal outer cover is used for resisting foreign matter impact and avoiding breakage of the transparent glass cover when the transparent glass cover is impacted by external force.
In the maintenance-free moisture absorber for the power transformer, the lower cover A and the lower cover B are funnel-shaped structures. Therefore, condensed water generated in the drying process can slide along the inner walls around the lower cover.
For the method, the technical scheme of the application is as follows:
the operation control method of the maintenance-free moisture absorber of the power transformer is used for controlling the operation of the maintenance-free moisture absorber of the power transformer and comprises three links of moisture absorption, main body dehumidification and auxiliary dehumidification;
the specific process of the moisture absorption link is as follows: the first electromagnetic valve and the second electromagnetic valve are in a closed state, the air exhaust fan A and the air exhaust fan B are closed, the heating assembly A and the heating assembly B do not work, the transformer oil pillow freely breathes through the main moisture absorption equipment, external air enters the main moisture absorption equipment after being filtered by the filtering device A, then enters the transformer oil pillow after being dried by the drying agent, and meanwhile, the humidity and humidity sensor continuously monitors the humidity of the air after being dried; after N months, the controller reads the humidity reading of the temperature and humidity sensor, if the reading is lower than the set value X%, the humidity reading is maintained in a moisture absorption link, and after 1 month, the controller reads the humidity reading of the temperature and humidity sensor once; if the reading is higher than the set value X%, the controller reads the humidity reading of the temperature and humidity sensor again after M days, if the reading is still higher than the set value X% after M days, the main body dehumidification link is entered, and if the reading is lower than the set value X% after M days, the main body dehumidification link is maintained, and the monthly monitoring is continued; n is more than or equal to 1 and less than or equal to 4, X is more than or equal to 40 and less than or equal to 60,8, and M is more than or equal to 12;
the specific process of the main body dehumidification link is as follows: the A exhaust fan and the A heating component are started and continuously work for H hours, the A heating component dries the drying agent in the main moisture absorption equipment, and the A exhaust fan blows water vapor evaporated in the drying process to the direction of an A air inlet so as to enable the water vapor to be discharged out of the equipment; simultaneously, the first electromagnetic valve and the second electromagnetic valve are opened, the auxiliary dehumidifying equipment provides dry air for the transformer oil pillow, external air enters the auxiliary dehumidifying equipment after being filtered by the B filtering device, and then enters the transformer oil pillow through the second electromagnetic valve after being dried by the drying agent; after H hours, the heating assembly A stops working, and the exhaust fan A continues working for H hours; h is more than or equal to 3 and less than or equal to 6;
the specific process of the auxiliary dehumidifying link is as follows: when the main body is dehumidified, the A heating assembly and the A exhaust fan stop working, the B exhaust fan and the B heating assembly are started and continuously work for h hours, the B heating assembly dries the drying agent in the auxiliary moisture absorption equipment, and the B exhaust fan blows the water vapor evaporated in the drying process to the direction of the B air inlet so as to be discharged out of the equipment; after h hours, the heating assembly B stops working, the exhaust fan B continues to work for h hours, and then the first electromagnetic valve and the second electromagnetic valve are closed; h is more than or equal to 2 and less than or equal to 4;
and after the auxiliary dehumidification is finished, the auxiliary dehumidification enters the moisture absorption link again, and the logic repeated circulation is operated.
Compared with the prior art, the operation control method of the maintenance-free moisture absorber of the power transformer is used for controlling the maintenance-free moisture absorber of the power transformer to operate in a specific mode (namely, three operations of moisture absorption, main dehumidification and auxiliary dehumidification are circularly performed); firstly, dry air is provided for a transformer oil pillow through main moisture absorption equipment, when the desiccant in the main moisture absorption equipment temporarily loses the water absorption capacity and is in a saturated state, the desiccant is automatically subjected to heating and dehumidification treatment, so that the desiccant can be repeatedly used, meanwhile, a first electromagnetic valve and a second electromagnetic valve are opened in the heating and dehumidification process, the dry air is provided for the transformer oil pillow through auxiliary moisture absorption equipment, the dehumidification efficiency is high, the dehumidification effect is good, finally, the auxiliary moisture absorption equipment automatically performs heating and dehumidification treatment on the desiccant inside after each use is finished, the drying performance of the desiccant can be ensured, and the desiccant can be continuously provided with dry air for the transformer oil pillow when the main moisture absorption equipment performs drying operation each time, so that the moisture absorber can always provide dry air for the transformer oil pillow when a transformer runs, and the moisture absorption effect is good; in addition, when main part dehumidification, auxiliary dehumidification link, heating element A, heating element B, A air exhaust fan and B air exhaust fan all are the work specific time, and this time is through many times experimental the obtaining, can avoid causing the excessive heating or the dehumidification of drier not thoroughly.
Drawings
FIG. 1 is a schematic diagram of a maintenance-free moisture absorber of a power transformer of the present application;
FIG. 2 is a top view of the maintenance-free breather of the power transformer of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2;
fig. 4 is a schematic structural view of the primary absorbent device of the present application (with the cover a removed);
fig. 5 is a schematic structural view of the auxiliary absorbent device of the present application (with the B cover removed);
FIG. 6 is a schematic view of the assembly of the A filter device and the A lower cover in the present application;
FIG. 7 is a schematic view of the heating assembly of the present application;
FIG. 8 is an internal schematic view of the heating assembly of FIG. 7;
FIG. 9 is a schematic view of the assembly of the B filter assembly and the B lower cover of the present application;
FIG. 10 is a schematic view of the assembly of the A and B covers of the present application;
FIG. 11 is a schematic structural view of the A bottom cover and the B bottom cover in the present application;
fig. 12 is a schematic structural view of the housing in the present application.
The marks in the drawings are: 1-main moisture absorption equipment, 11-A transparent glass cover, 12-A upper cover, 121-A air outlet, 13-A lower cover, 131-A air inlet, 14-A heating component, 141-metal mesh cover, 142-end cover, 143-axial respiratory tube, 144-bracket, 15-A filter device, 151-A ceramic filter sheet, 152-A spring, 16-A exhaust fan, 17-C exhaust fan, 18-A bottom cover, 181-A air inlet and 19-A metal housing; 2-auxiliary moisture absorption equipment, a 21-B transparent glass cover, a 22-B upper cover, a 221-B air outlet, a 23-B lower cover, a 231-B air inlet, a 24-B heating component, a 25-B filter device, a 251-B ceramic filter sheet, a 252-B spring, a 26-B exhaust fan, a 27-C exhaust fan, a 28-B bottom cover, a 281-B air inlet and a 29-B metal housing; 3-a controller; 4-connecting flanges; 5-a temperature and humidity sensor; 6-a first solenoid valve; 7-a second solenoid valve; 8-connecting seats, 801-mounting grooves; 9-a shell.
Detailed Description
The present application is further illustrated in the following figures and examples, which are not intended to be limiting.
Examples:
referring to fig. 1 to 12, the maintenance-free moisture absorber of the power transformer of the present application includes a main moisture absorbing device 1, an auxiliary moisture absorbing device 2, and a controller 3; the main moisture absorption device 1 comprises an A transparent glass cover 11; an upper cover 12 and a lower cover 13 are respectively arranged at two ends of the transparent glass cover 11; an A air outlet 121 is formed in the A upper cover 12, and an A air inlet 131 is formed in the A lower cover 13; the inside of the transparent glass cover 11 is provided with a desiccant (in this embodiment, silica gel particles) for drying the air entering, and an a heating component 14 for drying the desiccant; an A exhaust fan 16 is arranged in the A upper cover 12; an A filter device 15 is arranged at the A air inlet 131 and is used for filtering impurities in the entering air; the A air outlet 121 is provided with a connecting flange 4; the connecting flange 4 is used for being connected with the transformer oil conservator so that the inside of the main moisture absorption equipment 1 is communicated with the inside of the transformer oil conservator; a temperature and humidity sensor 5 is arranged in the connecting flange 4; the auxiliary moisture absorption device 2 comprises a B transparent glass cover 22; the two ends of the B transparent glass cover 22 are respectively provided with a B upper cover 22 and a B lower cover 23; a B air outlet 221 is formed in the B upper cover 22, and a B air inlet 231 is formed in the B lower cover 23; the inside of the transparent glass cover 22 is provided with a drying agent for drying the entering air, and a heating component 24 for drying the drying agent; the B air inlet 231 is provided with a B filter device 25 and a second electromagnetic valve 7; the filtering device 25 is positioned at the inner side of the second electromagnetic valve 7 and is used for filtering impurities in the entering air; a B exhaust fan 26 is arranged in the B upper cover 22; a first electromagnetic valve 6 (the position of the first electromagnetic valve 6 is higher than that of the a exhaust fan 16 and the B exhaust fan 26, that is, the communication channels of the main moisture absorption device 1 and the auxiliary moisture absorption device 2 are positioned above the exhaust fans) is connected between the a air outlet 121 and the B air outlet 221, so as to communicate the interiors of the main moisture absorption device 1 and the auxiliary moisture absorption device 2; the heating assembly A24, the heating assembly B24, the exhaust fan A16, the exhaust fan B26, the temperature and humidity sensor 5, the first electromagnetic valve 6 and the second electromagnetic valve 7 are respectively and electrically connected with the controller 3.
In this embodiment, the a filter 15 includes an a ceramic filter 151 and an a spring 152; both sides of the ceramic filter sheet A151 are connected with the lower cover A13 through a rotating shaft; one end of the A spring 152 is fixedly connected with the upper surface of the A ceramic filter 151, and the other end of the A spring is fixedly connected with the A lower cover 13; the B filter device 25 comprises a B ceramic filter sheet 251 and a B spring 252; the two sides of the ceramic filter sheet 251 are connected with the lower cover 23 through a rotating shaft; one end of the B spring 252 is fixedly connected with the upper surface of the B ceramic filter sheet 251, and the other end is fixedly connected with the B lower cover 23. The ceramic filter sheet is a round filter sheet which is porous and has relatively small pore diameter. When the air exhaust fan works, the ceramic filter disc is driven by the suction force of the air exhaust fan to rotate around the rotating shaft, so that a gap is formed between the ceramic filter disc and the inner wall of the lower cover, air circulation is smoother, and drying efficiency of the drying agent is further improved; when the exhaust fan does not work, the ceramic filter sheet resets under the action of spring force, so that impurities can not enter the transformer oil pillow along with air when the transformer oil pillow breathes.
In this embodiment, the a heating assembly 14 includes a metal mesh cover 141 and end caps 142 disposed at two ends of the metal mesh cover 141; the metal mesh cover 141 is filled with a drying agent; an axial breathing tube 143 is arranged at the center of the metal mesh cover 141, and a heating resistance wire is arranged between the axial breathing tube 143 and the metal mesh cover 141; the B heater assembly 24 is identical in construction to the a heater assembly 14. The heating component adopts the structure, is convenient to assemble and is easy to implement. The end covers at the two ends of the heating component are respectively connected with the upper cover and the lower cover, and a certain gap exists between the bottom of the heating component and the lower cover.
Further, a set of brackets 144 for mounting heating resistance wires are uniformly arranged on the outer surface of the axial breathing tube 143 along the circumferential direction. Therefore, the drying agent can be heated uniformly in the drying process.
In this embodiment, a C exhaust fan 17 is disposed at the bottom of the lower cover 13; the bottom of the first electromagnetic valve 6 is provided with a D exhaust fan 27; the outside of the C exhaust fan 17 is sleeved with an A bottom cover 18, and a plurality of A air inlet holes 181 are formed in the bottom of the A bottom cover 18; the outer part of the D exhaust fan 27 is sleeved with a B bottom cover 28, and the bottom of the B bottom cover 27 is provided with a plurality of B air inlet holes 281. When drying the drier, blow out the inside moisture of moisture absorption equipment through two exhaust fans, dehumidification effect is better.
In this embodiment, an a metal housing 19 is disposed outside the a transparent glass cover 11, and a plurality of a observation holes 191 are disposed on the surface of the a metal housing 19; the B transparent glass cover 21 is provided with a B metal cover 29 on the outside, and a plurality of B observation holes 291 are provided on the surface of the B metal cover 29. The metal outer cover is used for resisting foreign matter impact and avoiding the transparent glass cover from being broken when being impacted by external force; the observation hole is convenient for observe the condition of the drier in the transparent glass cover, prevents that phenomenon such as carbonization from appearing and can not be replaced in time. The upper cover 12 and the lower cover 13 are provided with clamping grooves, and two ends of the transparent glass cover 11 and the metal cover 19 are respectively inserted into the corresponding clamping grooves; the B upper cover 22 and the B lower cover 23 are provided with clamping grooves, and two ends of the B transparent glass cover 21 and the B metal outer cover 29 are respectively inserted into the corresponding clamping grooves.
In this embodiment, the lower cover a 13 and the lower cover B23 are both funnel-shaped. Therefore, condensed water generated in the drying process can slide along the inner walls around the lower cover.
In this embodiment, a connecting seat 8 is disposed between the upper cover a 12 and the upper cover B22; the connecting seat 8 is provided with a mounting groove 801; the first electromagnetic valve 6 is arranged in the mounting groove 801; the controller 3 is fixed on the connecting seat 8.
In this embodiment, a housing 9 is disposed outside the second electromagnetic valve 7; the two ends of the outer shell 9 are respectively connected with the B lower cover 23 and the B bottom cover 28.
The operation control method of the maintenance-free moisture absorber of the power transformer in the embodiment comprises three links of moisture absorption, main body dehumidification and auxiliary dehumidification;
the specific process of the moisture absorption link is as follows: the first electromagnetic valve 6 and the second electromagnetic valve 7 are in a closed state, the A exhaust fan 16 and the B exhaust fan 26 are closed, the A heating component 14 and the B heating component 24 do not work, the transformer oil pillow freely breathes through the main moisture absorption equipment 1, external air enters the main moisture absorption equipment 1 after being filtered by the A filtering device 15 and then enters the transformer oil pillow after being dried by a drying agent, and meanwhile, the humidity and humidity sensor 5 continuously monitors the humidity of the dried air; after 1 month, the controller 3 reads the humidity reading of the temperature and humidity sensor 5 (the controller 3 reads the reading after N months because the moisture absorbed by the desiccant is not enough if the time is too short, the humidity value monitored by the temperature and humidity sensor can not reach the set humidity value, the value of N needs to be read after 1 or 2 months according to the local annual humidity consideration, the place with high humidity can be read after 3 or 4 months, in the embodiment, the place with low humidity can be read after 1 month), if the reading is lower than the set value by 60%, the moisture absorption link is maintained, and then the controller 3 reads the humidity reading of the temperature and humidity sensor 5 once every 1 month; if the reading is higher than the set value 60%, the controller 3 again reads the humidity reading of the temperature and humidity sensor after 10 days, if the reading is still higher than the set value 60% after 10 days (indicating that the desiccant in the main moisture absorption device 1 temporarily loses the water absorption capacity and is in a saturated state), the main dehumidification link is entered, if the reading is lower than the set value 60% after 10 days, the main dehumidification link is maintained, and the monthly monitoring is continued (namely, the controller 3 reads the humidity reading of the temperature and humidity sensor 5 every 1 month);
the specific process of the main body dehumidification link is as follows: the A exhaust fan 16 and the A heating component 14 are started and continuously work for 4 hours, the A heating component 14 dries the drying agent in the main moisture absorption equipment 1, and the A exhaust fan 16 blows the water vapor evaporated in the drying process to the direction of the A air inlet 131 so as to be discharged out of the equipment; simultaneously, the first electromagnetic valve 6 and the second electromagnetic valve 7 are opened, the auxiliary dehumidifying equipment 2 provides dry air for the transformer oil pillow, the external air enters the auxiliary dehumidifying equipment 2 after being filtered by the B filtering device 25, and then enters the transformer oil pillow through the second electromagnetic valve 7 after being dried by the drying agent; after 4 hours, the heating assembly A14 stops working, and the exhaust fan A16 continues to work for 5 hours;
the specific process of the auxiliary dehumidifying link is as follows: when the main body is dehumidified, the A heating assembly 14 and the A exhaust fan 16 stop working, the B exhaust fan 26 and the B heating assembly 24 are started and continuously work for 3 hours, the B heating assembly 24 dries the drying agent in the auxiliary moisture absorption equipment 2, and the B exhaust fan 26 blows the water vapor evaporated in the drying process to the direction of the B air inlet 231 so as to be discharged out of the equipment; after 3 hours, the heating assembly 24 stops working, the exhaust fan 26 continues to work for 3 hours, and the first electromagnetic valve 6 and the second electromagnetic valve 7 are closed;
and after the auxiliary dehumidification is finished, the auxiliary dehumidification enters the moisture absorption link again, and the logic repeated circulation is operated.
The above general description of the invention and the description of specific embodiments thereof referred to in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, subtract or combine the features disclosed in the foregoing general description and/or the detailed description (including examples) to form other technical solutions within the scope of the present application without departing from the disclosure of the present application.
Claims (10)
1. Maintenance-free moisture absorber for power transformer, characterized in that: comprises a main moisture absorption device (1), an auxiliary moisture absorption device (2) and a controller (3);
the main moisture absorption device (1) comprises an A transparent glass cover (11); an upper cover (12) and a lower cover (13) are respectively arranged at two ends of the transparent glass cover (11); an A air outlet (121) is formed in the A upper cover (12), and an A air inlet (131) is formed in the A lower cover (13); the inside of the transparent glass cover A (11) is provided with a drying agent for drying the entering air, and a heating component A (14) for drying the drying agent; an A exhaust fan (16) is arranged in the A upper cover (12); an A filter device (15) is arranged at the A air inlet (131) and is used for filtering impurities in the entering air; the air outlet (121) is provided with a connecting flange (4); the connecting flange (4) is used for being connected with the transformer oil conservator so that the inside of the main moisture absorption equipment (1) is communicated with the inside of the transformer oil conservator; a temperature and humidity sensor (5) is arranged in the connecting flange (4);
the auxiliary moisture absorption device (2) comprises a B transparent glass cover (22); two ends of the transparent glass cover (22) are respectively provided with an upper cover (22) and a lower cover (23); a B air outlet (221) is formed in the B upper cover (22), and a B air inlet (231) is formed in the B lower cover (23); the inside of the transparent glass cover (22) is provided with a drying agent for drying the entering air, and the heating component (24) is used for drying the drying agent; a B filter device (25) and a second electromagnetic valve (7) are arranged at the B air inlet (231); the B filtering device (25) is positioned at the inner side of the second electromagnetic valve (7) and is used for filtering impurities in the entering air; a B exhaust fan (26) is arranged in the B upper cover (22);
a first electromagnetic valve (6) is connected between the A air outlet (121) and the B air outlet (221) and is used for communicating the main moisture absorption equipment (1) and the auxiliary moisture absorption equipment (2); the heating assembly A (24), the heating assembly B (24), the exhaust fan A (16), the exhaust fan B (26), the temperature and humidity sensor (5), the first electromagnetic valve (6) and the second electromagnetic valve (7) are respectively and electrically connected with the controller (3).
2. The maintenance-free moisture absorber of a power transformer as claimed in claim 1, wherein: the A filter device (15) comprises an A ceramic filter disc (151) and an A spring (152); both sides of the ceramic filter sheet A (151) are connected with the lower cover A (13) through a rotating shaft; one end of the A spring (152) is fixedly connected with the upper surface of the A ceramic filter sheet (151), and the other end of the A spring is fixedly connected with the A lower cover (13); the B filter device (25) comprises a B ceramic filter disc (251) and a B spring (252); two sides of the ceramic filter sheet (251) are connected with the lower cover (23) through a rotating shaft; one end of the B spring (252) is fixedly connected with the upper surface of the B ceramic filter sheet (251), and the other end of the B spring is fixedly connected with the B lower cover (23).
3. The maintenance-free moisture absorber of a power transformer as claimed in claim 1, wherein: the heating assembly (14) comprises a metal mesh cover (141) and end covers (142) arranged at two ends of the metal mesh cover (141); a drying agent is filled in the metal mesh enclosure (141); an axial breathing tube (143) is arranged at the central position of the metal mesh enclosure (141), and a heating resistance wire is arranged between the axial breathing tube (143) and the metal mesh enclosure (141); the structure of the heating component B (24) is the same as that of the heating component A (14).
4. A maintenance-free moisture absorber for a power transformer as defined in claim 3, wherein: a group of brackets (144) are uniformly arranged on the outer surface of the axial breathing tube (143) along the circumferential direction and are used for installing heating resistance wires.
5. The maintenance-free moisture absorber of a power transformer as claimed in claim 1, wherein: the bottom of the lower cover A (13) is provided with an exhaust fan C (17); the bottom of the first electromagnetic valve (6) is provided with a D exhaust fan (27).
6. The maintenance-free moisture absorber of a power transformer as set forth in claim 5, wherein: the outside of the C exhaust fan (17) is sleeved with an A bottom cover (18), and a plurality of A air inlet holes (181) are formed in the bottom of the A bottom cover (18); a B bottom cover (28) is sleeved outside the D exhaust fan (27), and a plurality of B air inlet holes (281) are formed in the bottom of the B bottom cover (27).
7. The maintenance-free moisture absorber of a power transformer as claimed in claim 1, wherein: an A metal outer cover (19) is arranged outside the A transparent glass cover (11), and a plurality of A observation holes (191) are formed in the surface of the A metal outer cover (19); a B metal housing (29) is arranged outside the B transparent glass housing (21), and a plurality of B observation holes (291) are formed in the surface of the B metal housing (29).
8. The maintenance-free moisture absorber of a power transformer as claimed in claim 1, wherein: the lower cover A (13) and the lower cover B (23) are both funnel-shaped structures.
9. The operation control method of the maintenance-free moisture absorber of the power transformer is characterized by comprising three links of moisture absorption, main body dehumidification and auxiliary dehumidification, wherein the method is used for controlling the operation of the maintenance-free moisture absorber of the power transformer in claim 1;
the specific process of the moisture absorption link is as follows: the first electromagnetic valve (6) and the second electromagnetic valve (7) are in a closed state, the A exhaust fan (16) and the B exhaust fan (26) are closed, the A heating component (14) and the B heating component (24) do not work, the transformer oil pillow freely breathes through the main moisture absorption equipment (1), external air enters the main moisture absorption equipment (1) after being filtered by the A filtering device (15) and enters the transformer oil pillow after being dried by a drying agent, and meanwhile, the humidity and humidity sensor (5) continuously monitors the humidity of the air after being dried; after N months, the controller (3) reads the humidity reading of the temperature and humidity sensor (5), if the reading is lower than the set value X%, the humidity reading of the temperature and humidity sensor (5) is maintained in a moisture absorption link, and then the controller (3) reads the humidity reading of the temperature and humidity sensor (5) every 1 month later; if the reading is higher than the set value X%, the controller (3) reads the humidity reading of the temperature and humidity sensor again after M days, if the reading is still higher than the set value X% after M days, the main body dehumidification link is entered, if the reading is lower than the set value X% after M days, the main body dehumidification link is maintained, and the monthly monitoring is continued; n is more than or equal to 1 and less than or equal to 4, X is more than or equal to 40 and less than or equal to 60,8, and M is more than or equal to 12;
the specific process of the main body dehumidification link is as follows: the A exhaust fan (16) and the A heating component (14) are started and continuously work for H hours, the A heating component (14) dries the drying agent in the main moisture absorption equipment (1), and the A exhaust fan (16) blows the water vapor evaporated in the drying process to the direction of the A air inlet (131) so as to be discharged out of the equipment; simultaneously, the first electromagnetic valve (6) and the second electromagnetic valve (7) are opened, dry air is provided for the transformer oil pillow by the auxiliary dehumidifying equipment (2), external air enters the auxiliary dehumidifying equipment (2) after being filtered by the B filtering device (25), and enters the transformer oil pillow through the second electromagnetic valve (7) after being dried by the drying agent; after H hours, the heating assembly A (14) stops working, and the exhaust fan A (16) continues to work for H hours; h is more than or equal to 3 and less than or equal to 6;
the specific process of the auxiliary dehumidifying link is as follows: when the main body is dehumidified, the A heating assembly (14) and the A exhaust fan (16) stop working, the B exhaust fan (26) and the B heating assembly (24) are started, and the B heating assembly (24) continuously works for h hours, the drying agent in the auxiliary moisture absorption equipment (2) is dried, and the B exhaust fan (26) blows water vapor evaporated in the drying process to the direction of the B air inlet (231) so as to be discharged out of the equipment; after h hours, the heating assembly (24) stops working, the exhaust fan (26) continues to work for h hours, and then the first electromagnetic valve (6) and the second electromagnetic valve (7) are closed; h is more than or equal to 2 and less than or equal to 4;
and after the auxiliary dehumidification is finished, the auxiliary dehumidification enters the moisture absorption link again, and the logic repeated circulation is operated.
10. The operation control method of a maintenance-free moisture absorber of a power transformer according to claim 9, wherein the a filter device (15) includes an a ceramic filter sheet (151) and an a spring (152); both sides of the ceramic filter sheet A (151) are connected with the lower cover A (13) through a rotating shaft; one end of the A spring (152) is fixedly connected with the upper surface of the A ceramic filter sheet (151), and the other end of the A spring is fixedly connected with the A lower cover (13); when the A exhaust fan (16) works, the A ceramic filter disc (151) rotates relative to the A lower cover (13) under the action of wind force, so that the air circulation space is increased, and when the A exhaust fan (16) stops working, the A ceramic filter disc (151) resets under the action of the elasticity of the A spring (152); the B filter device (25) comprises a B ceramic filter disc (251) and a B spring (252); two sides of the ceramic filter sheet (251) are connected with the lower cover (23) through a rotating shaft; one end of the B spring (252) is fixedly connected with the upper surface of the B ceramic filter sheet (251), and the other end of the B spring is fixedly connected with the B lower cover (23); when the B exhaust fan (26) works, the B ceramic filter disc (251) rotates relative to the B lower cover (23) under the action of wind force, so that the air circulation space is enlarged, and when the B exhaust fan (26) stops working, the B ceramic filter disc (251) resets under the action of the elasticity of the B spring (252).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566506.8A CN116435060A (en) | 2023-05-16 | 2023-05-16 | Maintenance-free moisture absorber of power transformer and operation control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566506.8A CN116435060A (en) | 2023-05-16 | 2023-05-16 | Maintenance-free moisture absorber of power transformer and operation control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116435060A true CN116435060A (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310566506.8A Pending CN116435060A (en) | 2023-05-16 | 2023-05-16 | Maintenance-free moisture absorber of power transformer and operation control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116435060A (en) |
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2023
- 2023-05-16 CN CN202310566506.8A patent/CN116435060A/en active Pending
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