CN116429275B - Transformer oil level gauge special for turn-to-turn short circuit test - Google Patents
Transformer oil level gauge special for turn-to-turn short circuit test Download PDFInfo
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- CN116429275B CN116429275B CN202310398393.5A CN202310398393A CN116429275B CN 116429275 B CN116429275 B CN 116429275B CN 202310398393 A CN202310398393 A CN 202310398393A CN 116429275 B CN116429275 B CN 116429275B
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 229910052734 helium Inorganic materials 0.000 claims abstract description 17
- 239000001307 helium Substances 0.000 claims abstract description 17
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 10
- 230000008602 contraction Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 17
- 230000033001 locomotion Effects 0.000 description 15
- 238000012544 monitoring process Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/32—Measuring temperature based on the expansion or contraction of a material the material being a fluid contained in a hollow body having parts which are deformable or displaceable
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to the technical field of transformer tests, in particular to a transformer oil level gauge special for an inter-turn short circuit test, which comprises an oil level gauge pipe body, wherein a sliding rod is connected in the oil level gauge pipe body in a sliding manner, a floating ball is fixedly connected to the bottom end of the sliding rod, an air pressure plate is connected to the inner wall of the sliding rod in a sliding manner, a post rod is fixedly connected to the top of the air pressure plate, an inter-turn short circuit alarm device is arranged in the oil level gauge pipe body, and a special test installation device is arranged on the surface of the oil level gauge pipe body. According to the invention, the oil temperature is monitored in real time by driving the upper pole of the air pressure plate according to the principle of thermal expansion and contraction of helium in the helium cavity in the floating ball, the oil temperature control pole which is rapidly increased during turn-to-turn short circuit is utilized to drive the clamping rod on the differential rotating block and the sound knocking plate on the sleeve pole to greatly rotate, impact sound is generated during rotation to alarm, and the rapid temperature increase is a triggering device to carry out sound alarm, so that the aim of automatically alarming when the turn-to-turn short circuit of the transformer is achieved.
Description
Technical Field
The invention relates to the technical field of transformer testing, in particular to a transformer oil level gauge special for turn-to-turn short circuit testing.
Background
The oil level gauge is generally composed of a seamless steel pipe, a buoy indicating device, a window and an upper cover or a pressure valve, wherein the window is mostly of a thick-wall glass pipe built-in structure, can display a specific oil level within 30mm of the lower part of a box cover, is true and accurate in oil level display, has no false oil level phenomenon, is integrated on a transformer, can continuously monitor the change of the oil level of transformer oil, can realize the change measurement of the oil level in millimeter level, and supports the real-time monitoring of the oil temperature and the pressure; when the inter-turn short circuit test is carried out on the transformer, a plurality of windings of the internal winding coil are led out to the inter-turn short circuit jumper board, and the inter-turn short circuit fault under various conditions is simulated through the inter-turn short circuit simulation test jumper board.
When the transformer is used for testing the inter-turn short circuit, the winding nodes of the inter-turn short circuit jumper board are connected to the switch, the switch is repeatedly short-circuited and disconnected, when the inter-turn short circuit occurs to the coil of the internal winding, the generated larger current can lead to the sudden temperature rise at the position of the internal coil, the original temperature in the transformer can quantitatively increase according to the self use condition, the curve span of the curve increase is increased when the inter-turn short circuit occurs, and the common oil level meter can monitor the temperature by utilizing a temperature sensor, but can not display and alarm according to the sudden temperature rise when the inter-turn short circuit occurs during the test.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a transformer oil level gauge special for turn-to-turn short circuit test, which solves the problems in the prior art. In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a special transformer oil level gauge of turn-to-turn short circuit test, includes the oil level gauge body, the inside sliding connection of oil level gauge body has the slide bar, the bottom fixedly connected with floater of slide bar, helium chamber has been seted up to the inside of floater, the inner wall sliding connection of slide bar has the barometer, the top fixedly connected with pole of barometer, the inside of oil level gauge body is provided with turn-to-turn short circuit alarm device, the surface of oil level gauge body is provided with the special installation device of test, the surface of pole sets up two rows of vertical array distribution's spliced pole;
the turn-to-turn short circuit alarm device comprises a clamping rod, the surface of the clamping rod is elastically connected with the inside of the oil level gauge pipe body through a torsion spring, one end of the clamping rod, which is close to a post rod, is fixedly connected with a differential rotating block, one end of the clamping rod, which is far away from the differential rotating block, is slidably connected with a sleeve column, the surface of the sleeve column is fixedly connected with a knocking plate, the end part of the sleeve column is rotationally connected with a sound outlet barrel, a clamping strip is fixedly arranged at the surface of the clamping rod, which is close to the sleeve column, and is in limiting sliding in the sleeve column through the clamping strip, the clamping strip is utilized to synchronously rotate, two lugs with different angles are arranged on the surface of the differential rotating block, the first lug is intermittently contacted by the post rod on the post rod under normal test, the quick rise of the oil temperature drives the post rod to quickly move upwards, and the second lug is driven by the next post rod when the first lug is not completely reset through elasticity after being contacted and driven by the post.
Preferably, the inside of play sound bucket is through spring elastic connection has the metal framework, the equal fixedly connected with of both sides of metal framework strikes the sound pole, the inside of metal framework is through spring elastic connection has the metal lamellar body, the one end fixedly connected with loudspeaker that the oil level gaugember body was kept away from to play sound bucket.
Preferably, the surface sliding connection who goes out the sound bucket has the stop collar, the fixed surface connection who goes out the sound bucket has the springboard, the bottom fixedly connected with gag lever post of springboard.
Preferably, the end part of the limit sleeve is fixedly connected with the surface of the oil level gauge pipe body, the inside of the limit sleeve is rotationally connected with the surface of the clamping rod, and the surface of the spring plate is elastically connected with the surface of the oil level gauge pipe body through a spring.
Preferably, the special installation device of test is including turning round seat and the spacing chuck in top, the inside of turning round the seat is through the surface of torsional spring elastic connection oil level gauge body, the bottom fixedly connected with slope ejector pad of turning round the seat, the inside sliding connection of the spacing chuck in top has the slide shaft, the bottom fixedly connected with arc card toothholder of slide shaft.
Preferably, the inside fixed connection oil level of the spacing chuck in top is measured the surface of the body, the surface connection of sliding axle is inclined pushing block's surface, the bottom of arc card toothholder is connected with the spacing chuck in bottom through the sliding axle, the inside fixed connection oil level of the spacing chuck in bottom is measured the surface of the body, the inner wall of arc card toothholder is measured the surface of the body through spring elastic connection oil level.
Preferably, the surface joint of arc card toothholder has fixed mounting cassette, the bottom fixedly connected with transformer body of fixed mounting cassette.
Preferably, the top of the top limiting chuck is provided with a yielding groove, and the inner wall of the yielding groove is connected with the surface of the limiting rod.
Preferably, the top fixedly connected with limiting plate of pole, the inside of spring elastic connection oil level gauge body is passed through at the top of limiting plate, the inner wall of surface sliding connection oil level gauge body of limiting plate.
Preferably, the surface fixedly connected with sealing plug of oil level gauge body, the bottom of the bottom spacing chuck of top fixedly connected with bottom of sealing plug, the surface fixedly connected with temperature display window of oil level gauge body, the top fixedly connected with pressure release disk seat of oil level gauge body.
According to the technical scheme, the transformer oil level gauge special for the turn-to-turn short circuit test has the following beneficial effects:
(1) According to the invention, the upper post rod of the air pressure plate is driven to move up and down by the principle of thermal expansion and contraction of helium in the helium cavity in the floating ball, the effect of monitoring the oil temperature in the transformer in the turn-to-turn short circuit test is achieved, the speed of the movement of the post rod is controlled by the speed of temperature increase, the post rod is not triggered to operate the turn-to-turn short circuit alarm device when the post rod moves up slowly, the rapid upward movement of the post rod is controlled by the oil temperature which is rapidly increased when the turn-to-turn short circuit occurs, so that the clamping rod on the differential rotating block and the knocking plate on the sleeve post are driven to rotate greatly, impact sound is generated in the rotation to alarm, and the sound alarm is carried out when the rapid temperature increase is the trigger device, so that the purpose of automatically alarming when the turn-to-turn short circuit of the transformer is achieved.
(2) According to the invention, the inclined pushing block is driven to push the arc-shaped latch seats on the sliding shaft to move by rotating the torsion seat, so that the arc-shaped latch seats are combined, the pipe body is integrally inserted into the fixed mounting latch seats after being combined, the torsion seat is loosened after the sealing plug is inserted into the transformer, the arc-shaped latch seats are scattered and reset through elasticity, and transverse teeth on the arc-shaped latch seats are clamped and fixed with grooves in the fixed mounting latch seats, so that the integral effect of rapidly mounting and dismounting the pipe body of the oil level gauge is further achieved.
(3) According to the invention, through the rotation of the abdication groove, the elastic plate on the limit rod drives the sound outlet barrel to slide outwards in the limit sleeve through elasticity, so that the clamping rod loses the clamping effect with the sleeve column, namely, the sound alarm cannot be generated by collision, the problem that the sound alarm cannot be generated is avoided, the floating ball connected to the sliding rod in the tube body is contacted with the oil top in the transformer, the floating rod is subjected to floating abdication under the influence of the contact, the post rod moves along with the abdication period, the differential rotating block is contacted during the movement period to drive the clamping rod to rotate, the clamping rod does not alarm, the problem that the sound alarm is caused by the amplitude motion of the floating ball during the installation period is avoided, and the alarm accuracy is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view showing a sectional structure of a pipe body of the oil level gauge of the present invention;
FIG. 3 is a schematic cross-sectional view of a floating ball according to the present invention;
FIG. 4 is a schematic diagram of the internal structure of the sound output barrel according to the present invention;
FIG. 5 is a schematic cross-sectional view of a stop collar according to the present invention;
FIG. 6 is a schematic diagram of an explosion structure of the test-dedicated mounting device according to the present invention;
fig. 7 is a schematic view of a structure of a fixing mount of the present invention.
In the figure: 1. an oil level gauge pipe body; 2. a slide rod; 3. a floating ball; 4. a helium chamber; 5. an air pressure plate; 6. a post; 61. a limiting disc; 7. an inter-turn short circuit alarm device; 71. a clamping rod; 72. a differential rotating block; 73. a sleeve column; 74. a sound knocking plate; 75. a sound outlet barrel; 76. a metal frame; 77. a sound knocking rod; 78. a metal sheet; 79. amplifying the loudspeaker; 710. a limit sleeve; 711. a spring plate; 712. a limit rod; 8. testing a special installation device; 81. a torsion seat; 82. tilting the push block; 83. a top limit chuck; 84. a slide shaft; 85. arc tooth holder; 86. a bottom limit chuck; 87. the clamping seat is fixedly installed; 88. a relief groove; 9. a transformer body; 10. a sealing plug; 11. a temperature display window; 12. the pressure releases the valve seat.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, the present invention provides the following technical solutions:
the oil level gauge special for the turn-to-turn short circuit test comprises an oil level gauge pipe body 1, wherein a slide rod 2 is connected in the oil level gauge pipe body 1 in a sliding manner, a floating ball 3 is fixedly connected at the bottom end of the slide rod 2, a winding node of a turn-to-turn short circuit jumper board is connected to a switch when the turn-to-turn short circuit test is carried out on a transformer, the switch is repeatedly shorted and disconnected, the oil level gauge pipe body 1 special for the turn-to-turn short circuit test is arranged on the transformer to be tested, the oil level in the transformer is monitored by the floating ball 3, and because the time of the test is short with the frequency, the voltage and the current used by the transformer, namely, unless the condition of oil leakage is encountered during the test, excessive change of the oil level does not exist, the pipe body is mainly used for monitoring the oil level, and during the test, an internal coil of the transformer can promote the slow increase of the oil temperature according to the use condition, when the turn-to-turn short circuit happens exactly, the temperature of the coil rises rapidly, the oil temperature rises suddenly, at the moment, a detector needs to be warned through the rapidly-rising oil temperature, so that the detector can know the specific situation of the turn-to-turn short circuit, a helium cavity 4 is arranged in the floating ball 3, helium is filled in the helium cavity 4, the helium has the property of thermal expansion and contraction, the helium can react according to the contacted temperature, meanwhile, the helium is not easy to react and explode in the air, so that the safety is higher, the inner wall of the sliding rod 2 is slidingly connected with the air pressure plate 5, the top of the air pressure plate 5 is fixedly connected with the post rod 6, the surface of the post rod 6 is provided with two rows of vertical array distributed, the thermal expansion and contraction are carried out through the helium contact temperature, the post rod 6 which is limited by movement on the air pressure plate 5 is driven to move up and down in a straight line, and the effect of monitoring the oil temperature in the transformer in real time is achieved, the transformer is in continuous test, because of accumulation of the use time, the internal oil temperature can slowly increase, namely the post rod 6 slowly moves upwards, the post rod 6 can not trigger the internal structure of the inter-turn short circuit alarming device 7 to operate when slowly moving upwards, when the oil temperature rapidly increases, the post rod 6 can increase the upward moving speed, thereby triggering the inter-turn short circuit alarming device 7, when the temperature rapidly increases, the triggering device carries out sound alarming, the purpose of automatic alarming when the transformer is in inter-turn short circuit is further achieved, the inter-turn short circuit alarming device 7 is arranged in the oil level meter tube body 1, and the special test mounting device 8 is arranged on the surface of the oil level meter tube body 1;
the inter-turn short circuit alarm device 7 comprises a clamping rod 71, the surface of the clamping rod 71 is elastically connected with the inside of the oil level gauge pipe body 1 through a torsion spring, one end of the clamping rod 71, which is close to a post rod 6, is fixedly connected with a differential rotating block 72, two bumps with different angles are arranged on the surface of the differential rotating block 72, the first bump is intermittently contacted by the post rod on the post rod 6 under normal test, namely, when a transformer is not in inter-turn short circuit, the internal oil temperature in test slowly increases, the post rod 6 drives a plurality of post rods to slowly move upwards, the post rods distributed in array sequentially contact with the first bump and drive the clamping rod 71 to rotate through the bumps, the first bump is driven by the elastic force of the torsion spring to reset and rotate after being contacted by the post rod, the differential rotating block 72 before the next post rod is contacted with the first post rod, and is driven by the next post rod, at the moment, the angle of the overall rotation of the differential rotating block 72 is smaller, the bump cannot be impacted by the post rod 75, one end of the clamping rod 71, which is far away from the post rod 72, the sleeve 73 is connected with one end of the post rod 73 in a sliding way, the sleeve 73 is driven by the sleeve 73 to move, the end is driven by the sleeve 73 after the sleeve 73 is driven to rotate, the sleeve 73 is driven to rotate completely, the end is driven by the sleeve 73 is driven to rotate completely, and the end is driven by the post rod 73 is driven to rotate completely, and the sleeve 73 is contacted with the sleeve 73 when the sleeve 73 is contacted with the end is contacted with the post rod, and is contacted with the post rod 73, and is completely and is contacted with the end is contacted with the post rod 73 and is contacted with the post rod. Thereby causing the phenomenon that the rotation angle of the differential rotating block 72 is increased, the differential rotating block 72 with the increased angle drives the knocking plate 74 on the sleeve column 73 to rotate greatly through the clamping rod 71, and contacts the voice barrel 75 in the rotation process and generates sound through the impact of the internal structure to give an audio alarm so as to prompt the problem of turn-to-turn short circuit of the tester.
In this embodiment, the inside of play sound bucket 75 is through spring elastic connection has metal framework 76, beat sound board 74 collide and produce striking sound with metal framework 76 and report to the police when carrying out the rotation by a wide margin, the both sides of metal framework 76 are all fixedly connected with and beat sound pole 77, the inside of metal framework 76 is through spring elastic connection has metal lamellar body 78, it drives it and carries out corresponding displacement simultaneously to beat sound board 74 after striking metal framework 76, make metal framework 76 strike metal lamellar body 78 through two beating sound pole 77 after removing and carry out audible alarm once more, two kinds of alarm modes, improve the effect of audible alarm, make it have warning nature more, simultaneously the metal framework 76 of elastic positioning has the vibration to beat sound pole 77 and strike metal lamellar body 78 a lot of, then reach the effect of extension audible alarm, the one end fixedly connected with loudspeaker 79 of play sound bucket 75 is kept away from oil level gauge body 1, play sound bucket 75 is located the junction of loudspeaker 79 and begins to have the sound through hole for with sound transmission to loudspeaker 79's inside, and utilize loudspeaker's shape to beat the sound effect of playing.
Further, the surface sliding connection who goes out sound bucket 75 has stop collar 710, stop collar 710 is used for carrying out spacing sliding support to play sound bucket 75, the inside of stop collar 710 is connected in the surface of tip fixed connection oil level gauge body 1 of stop lever 71 rotation on stop collar 710, the surface fixedly connected with spring plate 711 of play sound bucket 75, the bottom fixedly connected with gag lever post 712 of spring plate 711, the surface of spring plate 711 passes through the surface of spring elastic connection oil level gauge body 1, spring plate 711 drives play sound bucket 75 elastic fixation in stop collar 710 through elasticity, the bottom of gag lever post 712 is restricted by the groove 88 that gives way in the follow, make it drive under the normality play sound bucket 75 on the spring plate 711 shrink in the inside of stop collar 710, namely the inside joint of card strip and sleeve post 73 on the card post 71 at this moment, card post 71 can drive sleeve post 73 rotation, after the groove 88 is rotated, when the recess in the gag lever 711 slides to the groove, lose original position restriction, spring plate 711 can drive play sound bucket 75 outside the card post 71 through elasticity reset force, the inside sleeve post 71 is lost at this moment, the time, the problem of losing the slip post 73 with the inside the sleeve post 73 is avoided, thereby the alarm structure is not carried out to the contact with it, and the alarm is not carried out.
Furthermore, the special test mounting device 8 comprises a torsion seat 81 and a top limit chuck 83, wherein the interior of the torsion seat 81 is elastically connected with the surface of the oil level gauge pipe body 1 through a torsion spring, the bottom of the torsion seat 81 is fixedly connected with an inclined push block 82, the interior of the top limit chuck 83 is slidably connected with a slide shaft 84, the interior of the top limit chuck 83 is provided with a slide groove, the slide shaft 84 slides linearly in the slide groove, the slide shaft 84 is limited by the slide groove to move along a track, the bottom end of the slide shaft 84 is fixedly connected with an arc-shaped clamping seat 85, the number of the arc-shaped clamping seats 85 is more than two, circular arrays are required to be distributed in the lower area of the top limit chuck 83, the number of the slide shafts 84 is matched with the surface of the oil level gauge pipe body 1, the surface of the slide shaft 84 is fixedly connected with the surface of the inclined push block 82, the bottom end of the arc-shaped clamping seat 85 is connected with a bottom limit chuck 86 through the slide shaft 84, the inner part of the bottom limit chuck 86 is fixedly connected with the surface of the oil level gauge pipe body 1, the inner wall of the arc-shaped clamping tooth seat 85 is elastically connected with the surface of the oil level gauge pipe body 1 through a spring, the inclined pushing block 82 is driven by the rotating torsion seat 81 to rotate by taking the self axis point as the origin, the sliding shaft 84 is driven to slide in the sliding groove during rotation, the arc-shaped clamping tooth seats 85 on the sliding shafts 84 are driven by the inclined pushing blocks 82 to perform combined operation, the arc-shaped clamping tooth seats 85 move towards the axis point of the oil level gauge pipe body 1 to be combined, the whole oil level gauge pipe body is conveniently moved into the following fixed installation clamping seat 87 after being combined, the effect of convenient insertion and extraction is further achieved, the torsion seat 81 is released after the arc-shaped clamping tooth seat 85 is scattered and reset through elasticity, and the transverse teeth on the arc-shaped clamping tooth seats 85 are clamped and fixed with grooves in the fixed installation clamping seat 87, further achieves the integral effect of quickly installing and detaching the oil level gauge pipe body 1.
It is worth noting that the surface joint of arc card toothholder 85 has fixed mounting cassette 87, fixed mounting cassette 87's bottom fixedly connected with transformer body 9, because the transformer is carrying out the particularity during the turn-to-turn short circuit test, make the oil level gauge need carry out alarm design, carry out real-time supervision to the oil temperature and carry out audible alarm to the oil temperature that suddenly risen, can make the testers quick and even know the turn-to-turn short circuit, the oil mass monitoring function of oil level gauge is weakened simultaneously, make holistic oil level gauge be inconvenient for monitoring the transformer in daily use, so need install and dismantle in the experiment, traditional bolt installation is comparatively loaded down with trivial details, reach quick installation and dismantlement's effect through setting up test special installation device 8, can break off the alarming function of oil level gauge during the installation simultaneously, avoid the problem of invalid alarm 712, the top limit chuck 83 begins to have the groove 88 of stepping down, the inner wall and the surface connection of limit lever of groove 88, the rotation of seat 81 of stepping down through what the groove 88 drives the elastic force reset spring plate on the limit lever 712 through it, can drive the slip cap 710 outside through the elastic force reset, thereby can't produce the problem of the slip of the alarm 710 outwards that can's of the slip cap is avoided.
It is worth noting that the top of the post rod 6 is fixedly connected with a limit disc 61, the limit disc 61 is used for limiting the overall movement track effect of the post rod 6, so that the post rod 6 can only move up and down in a straight line, the top of the limit disc 61 is elastically connected with the inside of the oil level gauge pipe body 1 through a spring, the purpose of elastically resetting the air pressure plate 5 in the helium cavity 4 subjected to thermal expansion and shrinkage is facilitated through elasticity, the effect of thermal expansion, upward movement and cold shrinkage and downward movement is facilitated, the change of temperature is exhibited from the movement of the post rod 6, the change state of the oil temperature during turn-to-turn short circuit is more intuitively displayed, and the surface of the limit disc 61 is slidably connected with the inner wall of the oil level gauge pipe body 1; the fixed surface of oil level gauge body 1 is connected with sealing plug 10 for peg graft transformer top and carry out sealing connection, be used for improving transformer sealed effect, the bottom of the bottom spacing chuck 86 of top fixed connection of sealing plug 10, the fixed surface of oil level gauge body 1 is connected with temperature display window 11, the top fixedly connected with pressure release disk seat 12 of oil level gauge body 1.
When the transformer oil level gauge special for turn-to-turn short circuit test is used, the torsion seat 81 is rotated to drive the inclined push block 82 to push the arc-shaped clamping tooth seats 85 on the sliding shaft 84 to move, so that a plurality of arc-shaped clamping tooth seats 85 are combined, the pipe body is integrally inserted into the fixed mounting clamping seat 87 after the sealing plug 10 is inserted into the transformer, the torsion seat 81 is loosened, the arc-shaped clamping tooth seats 85 are scattered and reset through elasticity, transverse teeth on the arc-shaped clamping tooth seats are clamped and fixed with grooves in the fixed mounting clamping seat 87, the effect of quickly mounting and dismounting the whole pipe body 1 of the oil level gauge is further achieved, during mounting, when the limiting rod 712 slides to a concave position in the groove through rotation of the yielding groove 88, the elastic plate 711 at the moment drives the sound bucket 75 to slide outside in the limiting sleeve 710 through elasticity, so that the clamping rod 71 loses the clamping effect with the sleeve 73, namely, the clamping rod 71 is not contacted with the sleeve 73 at the moment, the upper structure is not driven to collide to generate sound alarm, the problem that the clamping rod is invalid, the upper structure is not in the yielding alarm is avoided, the problem is solved, the upper part of the sliding rod is connected with the floating ball 3, the floating ball is accurately contacted with the floating ball 71 during mounting, and the floating ball is accurately contacted with the floating ball 71 during the movement, and the movement of the floating ball is prevented from being influenced by the movement of the floating ball 71 during the movement, and the movement of the floating ball is accurately caused by the rolling movement of the floating ball during the rolling rod is prevented;
connecting the winding nodes of the inter-turn short-circuit jumper board to a switch, repeatedly shorting and disconnecting the switch, obtaining a current abrupt change signal, monitoring a current fluctuation value caused by the inter-turn short circuit, recording a current fluctuation amplitude, fitting an inter-turn short circuit software model by combining a voltage transformation ratio and a current transient data conclusion, and obtaining whether the inter-turn short circuit exists or not through real-time monitoring and real-time judgment of voltage and current waveforms in actual operation;
during normal test, the floating ball 3 monitors the oil temperature in real time through helium in the helium cavity 4, and the slow increase of the oil temperature enables the pole 6 on the air pressure plate 5 to slowly move upwards, and the pole 6 can not touch the internal structure of the turn-to-turn short circuit alarm device 7 to operate when slowly moving upwards; when an inter-turn short circuit occurs, the temperature of the transformer coil during the test is increased at a speed, the oil temperature is suddenly increased, the post rod 6 which is quickly moved upwards drives the differential rotating block 72 to quickly rotate and the rotating angle of the differential rotating block is increased, the differential rotating block 72 with the increased angle drives the sound striking plate 74 on the sleeve post 73 to greatly rotate through the clamping rod 71, the sound striking plate 74 collides with the metal frame 76 and generates striking sound to alarm when the sound striking plate greatly rotates, meanwhile, the sound striking plate 74 drives the metal frame 76 to correspondingly displace after striking the metal frame 76, the metal frame 76 is enabled to strike the metal sheet 78 through the two sound striking rods 77 after moving to carry out secondary sound alarm, and the two alarm modes improve the sound alarm effect, so that the metal frame 76 has warning performance, meanwhile, the elastically positioned metal frame 76 has vibration increasing performance, the sound striking rod 77 impacts the metal sheet 78 for a plurality of times, the purpose of deepening the sound alarm effect is achieved through the loudspeaker 79, and the problem of knowing the inter-turn short circuit condition of a tester is facilitated.
The above embodiments are only for illustrating the embodiments of the present invention, but not for limiting the embodiments of the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the embodiments of the present invention, so that all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the scope of the embodiments of the present invention should be defined by the claims.
Claims (10)
1. The utility model provides a special transformer oil level gauge of turn-to-turn short circuit test, includes oil level gauge body (1), its characterized in that: the oil level gauge comprises an oil level gauge pipe body (1), wherein a sliding rod (2) is slidably connected to the inside of the oil level gauge pipe body (1), a floating ball (3) is fixedly connected to the bottom end of the sliding rod (2), a helium cavity (4) is formed in the floating ball (3), an air pressure plate (5) is slidably connected to the inner wall of the sliding rod (2), a pole (6) is fixedly connected to the top of the air pressure plate (5), an inter-turn short circuit alarm device (7) is arranged in the oil level gauge pipe body (1), a special test mounting device (8) is arranged on the surface of the oil level gauge pipe body (1), and two rows of shaft columns distributed in a vertical array are arranged on the surface of the pole (6);
the inter-turn short circuit alarm device (7) comprises a clamping rod (71), the surface of the clamping rod (71) is elastically connected with the inside of an oil level gauge pipe body (1) through a torsion spring, one end, close to a post rod (6), of the clamping rod (71) is fixedly connected with a differential rotating block (72), one end, far away from the differential rotating block (72), of the clamping rod (71) is slidably connected with a sleeve column (73), the surface of the sleeve column (73) is fixedly connected with a knocking plate (74), the end of the sleeve column (73) is rotatably connected with a sound outlet barrel (75), the clamping rod (71) is fixedly provided with a clamping strip at the surface, close to the sleeve column (73), of the clamping strip is used for limiting sliding in the sleeve column (73), the surface of the differential rotating block (72) is provided with two bumps with different angles, a first bump is contacted with a post rod (6) in a sliding mode under a normal test, the rapid increase of the oil temperature drives the post rod (6) to rapidly move upwards, and the first bump is driven to be completely contacted with the post rod after being reset through the first bump, and the first bump is driven to be completely contacted with the post rod through the second bump.
2. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 1, wherein: the inside of play sound bucket (75) is through spring elastic connection has metal framework (76), the both sides of metal framework (76) are all fixedly connected with and strike sound pole (77), the inside of metal framework (76) is through spring elastic connection has metal lamellar body (78), the one end fixedly connected with loudspeaker (79) that oil level gauge body (1) were kept away from to play sound bucket (75).
3. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 1, wherein: the surface sliding connection who goes out sound bucket (75) has stop collar (710), the fixed surface connection who goes out sound bucket (75) has springboard (711), the bottom fixedly connected with gag lever post (712) of springboard (711).
4. A transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 3, wherein: the end part of the limit sleeve (710) is fixedly connected with the surface of the oil level gauge pipe body (1), the inside of the limit sleeve (710) is rotationally connected with the surface of the clamping rod (71), and the surface of the spring plate (711) is elastically connected with the surface of the oil level gauge pipe body (1) through a spring.
5. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 1, wherein: the special installation device for testing (8) comprises a torsion seat (81) and a top limit chuck (83), wherein the interior of the torsion seat (81) is elastically connected with the surface of the oil level gauge pipe body (1) through a torsion spring, the bottom of the torsion seat (81) is fixedly connected with an inclined push block (82), the interior of the top limit chuck (83) is slidably connected with a sliding shaft (84), and the bottom end of the sliding shaft (84) is fixedly connected with an arc-shaped clamping tooth seat (85).
6. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 5, wherein: the inside fixed connection oil level of top spacing chuck (83) is the surface of body (1) of gaugember, the surface connection of slide (84) is inclined push block (82) on the surface, the bottom of arc card toothholder (85) is connected with bottom spacing chuck (86) through slide (84), the inside fixed connection oil level of bottom spacing chuck (86) is the surface of body (1) of gaugember, the inner wall of arc card toothholder (85) is through the surface of spring elastic connection oil level gaugember body (1).
7. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 5, wherein: the surface joint of arc card toothholder (85) has fixed mounting cassette (87), the bottom fixedly connected with transformer body (9) of fixed mounting cassette (87).
8. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 5, wherein: the top of the top limiting chuck (83) is provided with a yielding groove (88), and the inner wall of the yielding groove (88) is connected with the surface of the limiting rod (712).
9. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 1, wherein: the top of the post rod (6) is fixedly connected with a limiting disc (61), the top of the limiting disc (61) is elastically connected with the inside of the oil level gauge pipe body (1) through a spring, and the surface of the limiting disc (61) is slidably connected with the inner wall of the oil level gauge pipe body (1).
10. The transformer oil level gauge special for turn-to-turn short circuit test as set forth in claim 1, wherein: the oil level gauge is characterized in that a sealing plug (10) is fixedly connected to the surface of the oil level gauge pipe body (1), the top of the sealing plug (10) is fixedly connected with the bottom of a bottom limiting chuck (86), a temperature display window (11) is fixedly connected to the surface of the oil level gauge pipe body (1), and a pressure release valve seat (12) is fixedly connected to the top of the oil level gauge pipe body (1).
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| CN202310398393.5A CN116429275B (en) | 2023-04-13 | 2023-04-13 | Transformer oil level gauge special for turn-to-turn short circuit test |
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| CN116429275B true CN116429275B (en) | 2024-03-29 |
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| CN114220627A (en) * | 2021-12-20 | 2022-03-22 | 江苏悦成变压器有限公司 | Indoor high-safety oil-immersed transformer |
| CN217788180U (en) * | 2022-07-12 | 2022-11-11 | 山东能源谷集团股份有限公司 | Intelligent monitoring device for distribution transformer |
| CN115876281A (en) * | 2022-12-28 | 2023-03-31 | 广东电网有限责任公司江门供电局 | Oil level indicator alarm device of transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1048025A (en) * | 1963-05-03 | 1966-11-09 | Brush Electrical Eng | Winding temperature indicator for dry-type transformers |
| CN107946043A (en) * | 2017-12-05 | 2018-04-20 | 广州谷粒优智能科技有限公司 | Power transformer connected with safety device |
| CN111477497A (en) * | 2020-03-18 | 2020-07-31 | 山东电力设备有限公司 | Intelligent double-floating-ball gas relay and monitoring system |
| CN111933414A (en) * | 2020-08-05 | 2020-11-13 | 陈太保 | Transformer overheating alarm protection device utilizing buoyancy principle |
| CN113284709A (en) * | 2021-05-17 | 2021-08-20 | 广东中顺电气制造有限公司 | Novel magnetic oil level gauge for transformer |
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|---|---|
| CN116429275A (en) | 2023-07-14 |
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