CN106531404A - Online monitoring device for silica gel tanks - Google Patents

Online monitoring device for silica gel tanks Download PDF

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Publication number
CN106531404A
CN106531404A CN201611054966.9A CN201611054966A CN106531404A CN 106531404 A CN106531404 A CN 106531404A CN 201611054966 A CN201611054966 A CN 201611054966A CN 106531404 A CN106531404 A CN 106531404A
Authority
CN
China
Prior art keywords
silica gel
gel tank
tank
cover body
arranges
Prior art date
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.)
Granted
Application number
CN201611054966.9A
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Chinese (zh)
Other versions
CN106531404B (en
Inventor
智勇军
周志锋
李慧娜
黄朝阳
付晓
孙伟
张君平
张崔嵬
李居才
王培川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pingdingshan Power Supply Co of State Grid Henan Electric Power Co Ltd
Original Assignee
Pingdingshan Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pingdingshan Power Supply Co of State Grid Henan Electric Power Co Ltd filed Critical Pingdingshan Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority to CN201611054966.9A priority Critical patent/CN106531404B/en
Publication of CN106531404A publication Critical patent/CN106531404A/en
Application granted granted Critical
Publication of CN106531404B publication Critical patent/CN106531404B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/08Cooling; Ventilating
    • H01F27/10Liquid cooling
    • H01F27/12Oil cooling
    • H01F27/14Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/40Structural association with built-in electric component, e.g. fuse
    • H01F27/402Association of measuring or protective means

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses an online monitoring device for silica gel tanks. The online monitoring device comprises a cover body, wherein the cover body is internally provided with a main transformer breathing tube and a silica gel tank mechanism connected with the main transformer breathing tube; the silica gel tank mechanism comprises a substrate, a telescopic rod arranged on the substrate, a rotating module arranged on the telescopic rod and a spindle arranged at the upper part of the rotating module; and a plurality of silica gel tanks are arranged on the side face of the spindle through supporting rods. The device adopts the manner that the silica gel tanks realize mutual conversion and can be regenerated, long-term stable operation of the device can be guaranteed, the cover body is arranged outside the device, isolation can be carried out, interference of external environment is avoided, the cruising ability can be strengthened when the device is used in an unattended transformer substation, and the number of times of patrolling is reduced.

Description

Silica gel tank on-Line Monitor Device
Technical field
The present invention relates to matched transformer complete equipment technical field, fills more particularly, to a kind of silica gel tank on-Line Monitor Device Put.
Background technology
Main transformer in operation, can produce Repiration with outside air by air tube, without installation breathing such as on air tube Dessicator, main transformer are directly sucked in extraneous humid air, especially are more easy to make main transformer make moist in rainy day and high humidity weather.Traditional main transformer Breathing dessicator is when its hygroscopic fillers discoloration silica gel moisture absorption saturation, it is impossible to automatic alarm, needs ability after staff's field observation Can notify that professional comes to change, this can cause make moist because not changing hygroscopic material main transformer in time, need to send someone in addition Drive to the waste of replacing;And a kind of main transformer with on-line checking warning function is disclosed in 201420005815.4 and is exhaled Moisture absorption apparatus, including main transformer air tube are inhaled, the main transformer air tube is connected with silica gel tank, in the silica gel tank, be filled with conduct The discoloration silica gel of hygroscopic material, be provided with outside the side of the silica gel tank its probe receive tank in discoloration silica gel at setting height Color wavelength variable signal automatic wavelength detecting, be additionally provided with outside the side of the silica gel tank and automatic wavelength detecting The alarm of electric connection.The device technique is advanced, reliable operation, can be when the hygroscopic fillers in the silica gel tank that works fail, root According to the change automatic alarm of discoloration silica gel color wavelength, staff is reminded to change the discoloration silica gel in silica gel tank in time in time, Without the need for staff's field observation, it is to avoid the waste of human and material resources and financial resources, due to changing qualified hygroscopic material in time, have Try hard to keep and hinder main transformer safe operation, be particularly well-suited to the remote transformer station of unmanned of existing extensive utilization, with big advantage;But The drawbacks of there is simple structure complex operation in which.
In a kind of 201220234931.4 novel transformer respiratory organ silica gel tanks, it contains tank body, and the tank body upper end sets Screw thread is equipped with, the tank body is by the screw thread and the movable connection of connecting tube.Ring is provided between the tank body and connecting tube Shape sealing gasket.Junction between the tank body and connecting tube is provided with clamp button of the spring.This utility model tank body top arranges spiral shell Stricture of vagina, easily can be screwed with connecting tube and be connected, and change silica gel speed soon, and labor intensity is low.In addition, between tank body and connecting tube Spring bracelet is provided with, loosening and gas leak phenomenon that tank body is produced because of vibrations is effectively prevented;But this structure can not be realized Regeneration with and when change automatically, then may result in the phenomenon into steam in transformator, it is therefore desirable to which one kind can be to silica gel The device monitored on-line by tank.
The content of the invention
In view of this, the purpose of the present invention is for the deficiencies in the prior art, there is provided a kind of silica gel tank on-Line Monitor Device Device, not only solves the problems, such as that silica gel tank is monitored on-line, and can change silica gel tank by way of automatically controlling in time, and Silica gel tank to changing regenerates, and realizes its continuous service.
To reach above-mentioned purpose, the present invention is employed the following technical solutions:
Silica gel tank on-Line Monitor Device, including cover body, arrange in the cover body main transformer air tube and with the main transformer air tube phase The silica gel tank mechanism of connection, the silica gel tank mechanism include pedestal, the expansion link being arranged on pedestal, are arranged on expansion link and revolve Revolving die block, the rotary module upper mandrel is arranged on, the mandrel side arranges multiple silica gel tanks by support bar;
The silica gel tank lower surface arranges downwardly open funnel interface;
The mask body intracavity bottom arranges connect cover external body and the ventilation duct being engaged with the funnel interface, the ventilation duct Bottom arranges filter element and waterproof ventilated membrane, and the ventilation duct top is provided with the blower fan of heating wire;
The cover body top arranges opening, and the open outside arranges dust cover;
The silica gel tank wall arranges the automatic wavelength detector being connected with controller, the rotary module, expansion link and wind Machine is connected with the controller.
The expansion link is electric expansion bar, and the rotary module is motor.
Polytetrafluorethylecoatings coatings are set in the funnel interface, and the main transformer air tube upper end arranges O-ring seal.
Electromagnetic valve is set on the main transformer air tube, breather is set on the silica gel tank, the breather top is arranged Filter element.
The controller is connected with the electricity sun energy cell panel for being arranged on cover body surface, and the cover body lower surface arranges electric power storage Pond and wireless signal transceiver.
The quantity of the silica gel tank is that discoloration silica gel is arranged in three, the silica gel tank, and the automatic wavelength detector sets Put in the silica gel tank safe altitude.
The silica gel pot bottom arranges stirring wheel, and the stirring wheel is arranged on the downwardly open place of silica gel tank, and the stirring Connection rotating shaft on wheel, the rotating shaft bottom connect impeller.
The using method of the present invention:
S1:This device is arranged at main transformer original silica gel tank, carries out tentatively crossing air filtering by cover body so that silica gel tank is in breathing During reduce the interference of dust, after wavelength detector detects silica gel discoloration automatically on the silica gel tank, send letter to controller Number;
S2:Controller after there is discoloration in the silica gel tank for receiving working condition, and by automatic wavelength detection in each silica gel tank Device detects data, passes to controller, at the same time closed electromagnetic valve, and controller analysis rear telescopic rod is raised above so that Funnel interface departs from ventilation duct, and turns to corresponding silica gel tank by motor;
S3:After the landing sealing of silica gel tank, electromagnetic valve is opened, ventilation duct is then connected, the blower fan in ventilation duct is by outside sky Aspiration enters in cover body ventilation duct, and is heated, and the impeller that the stirring wheel in silica gel tube bottom is connected by shaft, so as to Silica gel particle is stirred, accelerates the speed of regeneration;
S4:After automatic wavelength detector detects the recovery of silica gel color, blower fan is closed, so as to complete regeneration.
The silica gel tank on-Line Monitor Device that the present invention is adopted, main air tube is arranged cover body side, and is introduced to cover body Silica gel tank mechanism that is interior, in cover body connection main transformer air tube being set and is connected with the main transformer air tube, and silica gel tank machine Structure includes pedestal, the expansion link being arranged on pedestal, is arranged on rotary module on expansion link, is arranged on the rotary module top Heart axle, mandrel side arrange multiple silica gel tanks by support bar;The lifting of rotary module is controlled by expansion link, using rotating mould Block can control the angle of its rotation, and the rotary module for adopting for motor, and which can strictly control the angle for rotating, and In silica gel tank lower surface, downwardly open funnel interface is set;Can be realized by funnel interface during pushing It is oriented to locking;It is and mask body intracavity bottom arranges connect cover external body and the ventilation duct being engaged with the funnel interface, described logical Airduct bottom arranges filter element and waterproof ventilated membrane, and the ventilation duct top is provided with the blower fan of heating wire;Can be by outside Air is introduced wherein, and is pressurized by blower fan, is heated by heating wire, is blown into high temperature gas flow into silica gel tank, and As the effect of air-flow causes wheel rotation, so as to drive stirring wheel to be stirred silica gel particle, so as to accelerate dissipating for steam Lose, and arrange on cover body top and be open, and dust cover is set on open outside, the dust cover of employing can be to into cover body Air carries out preliminary filtration;In order to strengthen the result of water-vapor exchange, blower fan is set at dust cover, in gas exchange When, quickly steam is excluded.
In addition, arranging electromagnetic valve on main air tube, can timely be cut off by electromagnetic valve, it is to avoid filtered Air enter in transformator, and silica gel tank wall arranges the automatic wavelength detector that is connected with controller, can be to silica gel The color of granule is detected, it is ensured that regeneration and the accuracy changed, and in funnel interface arranges polytetrafluorethylecoatings coatings, described Main transformer air tube upper end arranges O-ring seal;The effect of sealing, and the controller for adopting can be strengthened for CUP, and controller with The electricity sun energy cell panel for being arranged on cover body surface is connected, and the cover body lower surface arranges accumulator and wireless signal transceiver, The data of acquisition can be passed to control room by wireless signal transceiver, when there is color change in silica gel tank, then be carried Show that control room sends people over here to change silica gel tank, and the quantity of silica gel tank be three, discoloration silica gel is set in the silica gel tank, it is described from Dynamic wavelength detector is arranged in the silica gel tank safe altitude.
The present invention is by the way of multiple silica gel tanks are mutually changed and can be regenerated, it is ensured that this device can be steady in a long-term Operation, and cover body is set outside the device, can be isolated, it is to avoid the interference of external environment, be used in unmanned value During the transformer station of class, endurance can be strengthened, reduce the number of times of inspection.
Description of the drawings
Fig. 1 is the structural front view of the present invention;
Fig. 2 is the schematic top plan view of the present invention;
Fig. 3 is the structural representation at A of the present invention;
Fig. 4 is the structural representation at B of the present invention;
Fig. 5 is the structural representation of O-ring of the present invention;
Fig. 6 is another kind of structural representation of O-ring of the present invention.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention Accompanying drawing 1-6, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this A part of embodiment of invention, rather than the embodiment of whole.Based on described embodiments of the invention, the common skill in this area The every other embodiment obtained by art personnel, belongs to the scope of protection of the invention.
Embodiment one:
Arrange in silica gel tank on-Line Monitor Device, including cover body 2, the cover body 2 main transformer air tube 9 and with the main transformer air tube The 9 silica gel tank mechanisms being connected, the silica gel tank mechanism include pedestal, the expansion link 12 being arranged on pedestal, be arranged on it is flexible Rotary module on bar 12, the rotary module upper mandrel 4 is arranged on, 4 side of heart axle arranges multiple silicon by support bar Glue tank 3;
3 lower surface of silica gel tank arranges downwardly open funnel interface 35;
2 inner chamber bottom of the cover body arranges the ventilation duct 18 being engaged outside connection cover body 2 and with the funnel interface 35, described 18 bottom of ventilation duct arranges filter element 14 and waterproof ventilated membrane 13, and 18 top of the ventilation duct is provided with the blower fan of heating wire 19 20;
2 top of the cover body arranges opening, and the open outside arranges dust cover 1;
3 outer wall of silica gel tank arranges the automatic wavelength detector 8 being connected with controller 17, the rotary module, expansion link 12 and blower fan 20 be connected with the controller 17.
The expansion link 12 is electric expansion bar, and the rotary module is motor 11.
Electromagnetic valve 10 is set on the main transformer air tube 9, breather, the breather top are set on the silica gel tank 3 Filter element 7 is set.
The controller 17 is connected with the electricity sun energy cell panel 6 for being arranged on 2 surface of cover body, and 2 lower surface of the cover body sets Put accumulator 15 and wireless signal transceiver 16.
The quantity of the silica gel tank 3 is three, and discoloration silica gel, the automatic wavelength detector 8 are arranged in the silica gel tank 3 It is arranged in 3 safe altitude of silica gel tank.
The silica gel tank on-Line Monitor Device that the present invention is adopted, main air tube is arranged cover body side, and is introduced to cover body Silica gel tank mechanism that is interior, in cover body connection main transformer air tube being set and is connected with the main transformer air tube, and silica gel tank machine Structure includes pedestal, the expansion link being arranged on pedestal, is arranged on rotary module on expansion link, is arranged on the rotary module top Heart axle, the mandrel side arrange multiple silica gel tanks by support bar;The lifting of rotary module is controlled by expansion link, using rotation Revolving die block can control the angle of its rotation, and the rotary module for adopting for motor, and which can strictly control the angle for rotating Degree, and downwardly open funnel interface is set in silica gel tank lower surface;Can be during pushing, by funnel interface Realize being oriented to locking;And mask body intracavity bottom arranges connect cover external body and the ventilation duct being engaged with the funnel interface, institute State ventilation duct bottom and filter element and waterproof ventilated membrane are set, the ventilation duct top is provided with the blower fan of heating wire;Can outward The air in portion is introduced wherein, and is pressurized by blower fan, is heated by heating wire, is blown into High Temperature Gas into silica gel tank Stream, and as the effect of air-flow causes wheel rotation, so as to drive stirring wheel to be stirred silica gel particle, so as to accelerate steam Scatter and disappear, and arrange on cover body top and be open, and dust cover is set on open outside, the dust cover of employing can be to entering cover The air of body carries out preliminary filtration.
Electromagnetic valve is set on main air tube in addition, can timely be cut off by electromagnetic valve, it is to avoid filtered Air enter in transformator, and silica gel tank wall arranges the automatic wavelength detector that is connected with controller, can be to silica gel The color of granule is detected, it is ensured that regeneration and the accuracy changed, and in funnel interface arranges polytetrafluorethylecoatings coatings, described Main transformer air tube upper end arranges O-ring seal;The effect of sealing, and the controller for adopting can be strengthened for CUP, and controller with The electricity sun energy cell panel for being arranged on cover body surface is connected, and the cover body lower surface arranges accumulator and wireless signal transceiver, The data of acquisition can be passed to control room by wireless signal transceiver, when there is color change in silica gel tank, then be carried Show that control room sends people over here to change silica gel tank, and the quantity of silica gel tank be three, discoloration silica gel is set in the silica gel tank, it is described from Dynamic wavelength detector is arranged in the silica gel tank safe altitude.
Embodiment two
The using method of the present invention:
S1:This device is arranged at main transformer original silica gel tank, carries out tentatively crossing air filtering by cover body so that silica gel tank is in breathing During reduce the interference of dust, after wavelength detector detects silica gel discoloration automatically on the silica gel tank, send letter to controller Number;
S2:Controller after there is discoloration in the silica gel tank for receiving working condition, and by automatic wavelength detection in each silica gel tank Device detects data, passes to controller, at the same time closed electromagnetic valve, and controller analysis rear telescopic rod is raised above, and leads to Cross motor and turn to corresponding silica gel tank;
S3:After the landing sealing of silica gel tank, electromagnetic valve is opened, ventilation duct is then connected, the blower fan in ventilation duct is by outside sky Aspiration enters in cover body ventilation duct, and is heated, and the impeller that the stirring wheel in silica gel tube bottom is connected by shaft, so as to Silica gel particle is stirred, accelerates the speed of regeneration;
S4:After automatic wavelength detector detects the recovery of silica gel color, blower fan is closed, so as to complete regeneration.
Embodiment three
Which with the difference of embodiment one is:3 bottom of silica gel tank arranges stirring wheel 31, and the stirring wheel 31 is arranged on silica gel 3 downwardly open place of tank, and connection rotating shaft 32 on the stirring wheel 31,32 bottom of rotating shaft connection impeller 33.
In this embodiment, can pulling force sensor be set between electric expansion bar and motor also, under detection Whether compress when being depressed at ventilation duct, and be transferred to controller, by controller control, if stopping continues to push and rising.
Example IV
Which with the difference of embodiment one is:Polytetrafluorethylecoatings coatings, the main transformer air tube 9 are set in the funnel interface 35 Upper end arranges O-ring seal 34.
Using O-ring seal 34, including sealing ring body, the sealing ring chamber body is provided with rubber inner ring 345, institute State.
The high elastic rubber circle includes buffer cavity 343, and 343 outer wall of the buffer cavity is provided with honeycomb elastic ring 341, Solid rubber column 344, the high elastic rubber circle and honeycomb elastic ring are provided with inside the buffer cavity 343 in cruciform shape It is provided with buffering upright 342 between 341 in a ring.
The above-mentioned sealing ring that the embodiment is adopted, can not only keep elasticity well and can keep close well Feng Xing, it is ensured which can obtain better seal, while can also can under long-term squeezed state when crush seal is repeated Keep good elasticity, it is ensured that possess good sealing during long-term work, in practical operation, when this device has used 5 years There is not the phenomenon of sealing decline.
Finally illustrate, only to illustrate technical scheme and unrestricted, this area is common for above example Other modifications or equivalent that technical staff is made to technical scheme, without departing from technical solution of the present invention Spirit and scope, all should cover in the middle of scope of the presently claimed invention.

Claims (7)

1. main transformer air tube is set in a kind of silica gel tank on-Line Monitor Device, including cover body, the cover body and is exhaled with the main transformer The silica gel tank mechanism that suction pipe is connected, the silica gel tank mechanism include pedestal, the expansion link being arranged on pedestal, be arranged on it is flexible Rotary module on bar, the rotary module upper mandrel is arranged on, the mandrel side arranges multiple silica gel tanks by support bar; The silica gel tank lower surface arranges downwardly open funnel interface;The mask body intracavity bottom arrange connect cover external body and with institute The ventilation duct that funnel interface is engaged is stated, the ventilation duct bottom arranges filter element and waterproof ventilated membrane, and the ventilation duct top sets Put the blower fan with heating wire;The cover body top arranges opening, and the open outside arranges dust cover;The silica gel tank wall The automatic wavelength detector that is connected with controller of setting, the rotary module, expansion link and blower fan with the controller phase Connection;Polytetrafluorethylecoatings coatings are set in the funnel interface, and the main transformer air tube upper end arranges O-ring seal;It is described O-shaped Sealing ring, including sealing ring body, the sealing ring chamber body are provided with rubber inner ring, the sealing ring body and rubber inner ring Between be provided with high elastic rubber circle in a ring.
2. silica gel tank on-Line Monitor Device according to claim 1, it is characterised in that:The expansion link is electric expansion Bar, the rotary module are motor.
3. silica gel tank on-Line Monitor Device according to claim 1, it is characterised in that:Electricity is set on the main transformer air tube Magnet valve, arranges breather on the silica gel tank, the breather top arranges filter element.
4. silica gel tank on-Line Monitor Device according to claim 1, it is characterised in that:The controller be arranged on cover body The electricity sun energy cell panel on surface is connected, and the cover body lower surface arranges accumulator and wireless signal transceiver.
5. silica gel tank on-Line Monitor Device according to claim 1, it is characterised in that:The quantity of the silica gel tank is three It is individual, discoloration silica gel is set in the silica gel tank, the automatic wavelength detector is arranged in the silica gel tank safe altitude.
6. silica gel tank on-Line Monitor Device according to claim 1, it is characterised in that:The silica gel pot bottom arranges stirring Wheel, the stirring wheel are arranged on the downwardly open place of silica gel tank, and connection rotating shaft on the stirring wheel, and the rotating shaft bottom connects leaf Wheel.
7. the using method of silica gel tank on-Line Monitor Device according to claim 1, it is characterised in that:
S1:This device is arranged at main transformer original silica gel tank, carries out tentatively crossing air filtering by cover body so that silica gel tank is in breathing During reduce the interference of dust, after wavelength detector detects silica gel discoloration automatically on the silica gel tank, send letter to controller Number;
S2:Controller after there is discoloration in the silica gel tank for receiving working condition, and by automatic wavelength detection in each silica gel tank Device detects data, passes to controller, at the same time closed electromagnetic valve, and controller analysis rear telescopic rod is raised above so that Funnel interface departs from ventilation duct, and turns to corresponding silica gel tank by motor;
S3:After the landing sealing of silica gel tank, electromagnetic valve is opened, ventilation duct is then connected, the blower fan in ventilation duct is by outside sky Aspiration enters in cover body ventilation duct, and is heated, and the impeller that the stirring wheel in silica gel tube bottom is connected by shaft, so as to Silica gel particle is stirred, accelerates the speed of regeneration;
S4:After automatic wavelength detector detects the recovery of silica gel color, blower fan is closed, so as to complete regeneration.
CN201611054966.9A 2016-11-25 2016-11-25 Silica gel tank on-Line Monitor Device Active CN106531404B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611054966.9A CN106531404B (en) 2016-11-25 2016-11-25 Silica gel tank on-Line Monitor Device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611054966.9A CN106531404B (en) 2016-11-25 2016-11-25 Silica gel tank on-Line Monitor Device

Publications (2)

Publication Number Publication Date
CN106531404A true CN106531404A (en) 2017-03-22
CN106531404B CN106531404B (en) 2018-09-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611054966.9A Active CN106531404B (en) 2016-11-25 2016-11-25 Silica gel tank on-Line Monitor Device

Country Status (1)

Country Link
CN (1) CN106531404B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110323039A (en) * 2019-07-27 2019-10-11 南京蹑波物联网科技有限公司 A kind of automatic moisture absorption apparatus of transformer with Humidity Detection
CN110376191A (en) * 2019-08-24 2019-10-25 余田花 Silica gel is deliquesced from sentencing device in a kind of main transformer respirator
WO2020223776A1 (en) * 2019-05-03 2020-11-12 Treetech Sistemas Digitais Ltda System, method and device for monitoring the sealing of electrical equipment and electrical equipment with monitored sealing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020223776A1 (en) * 2019-05-03 2020-11-12 Treetech Sistemas Digitais Ltda System, method and device for monitoring the sealing of electrical equipment and electrical equipment with monitored sealing
CN110323039A (en) * 2019-07-27 2019-10-11 南京蹑波物联网科技有限公司 A kind of automatic moisture absorption apparatus of transformer with Humidity Detection
CN110376191A (en) * 2019-08-24 2019-10-25 余田花 Silica gel is deliquesced from sentencing device in a kind of main transformer respirator

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