Oil conservator for transformer

Abstract

The invention relates to the technical field of transformers, in particular to a transformer oil conservator which comprises a support and an oil storage mechanism installed on the support, and a breathing mechanism is installed on a fixing mechanism. During maintenance, the allochroic silica gel in the glass cover needs to be replaced after discoloring, at the moment, the rotating sleeve can be rotated to drive the top plate to descend, after the top plate descends, the two grabbing plates descend accordingly, then the upper flanges located on the grabbing plates are separated from the connecting plate at the bottom of the breathing tube, and the rotating sleeve continues to be rotated to increase the distance between the upper flanges and the connecting plate; the glass cover does not need to be dragged by multiple inspectors, the glass cover can be hung on the fixing column on the top plate through the grabbing plate when the rotating sleeve rotates to descend, manpower is saved, the two lug plates can be held to take down the grabbing plate from the fixing column when the rotating sleeve rotates to a certain position, and the glass cover is disassembled. The grabbing plate is hung on the fixing column, the rotating sleeve is reversely rotated to achieve rising of the upper flange, and the upper flange and the connecting plate abut against the sealing mechanism to complete installation.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and specifically relates to an oil conservator for a transformer. Background Art

[0002] The oil conservator creates conditions for the thermal expansion and contraction of the transformer oil, and there are corrugated type, capsule type, and diaphragm type; the principle of the oil conservator is that when the volume of the transformer oil expands or decreases with the temperature of the oil, the oil conservator plays a role in regulating the oil volume and ensuring that the transformer oil tank is always filled with oil. The oil conservator mainly includes an oil conservator body, a breather, an oil level gauge, and a capsule. The function of the breather is mainly to balance the pressure change between the inside and outside of the transformer, and at the same time prevent harmful substances such as moisture and dust from entering the transformer oil, ensuring the insulation performance and operation reliability of the transformer.

[0003] However, in the current transformer oil conservator, when the temperature of the transformer rises during operation, the oil inside the transformer flows into the oil conservator, and when the temperature drops, the oil inside the oil conservator flows back. The airbag inside the oil conservator can change the pressure according to the increase in the transformer temperature. When the temperature rises, the airbag is deflated, and when the temperature drops, the airbag resets. The end of the airbag is connected to a breather, and the breather is filled with discoloring silica gel to absorb moisture in the air. When the color of the silica gel changes from blue to pink, it needs to be replaced. Currently, the breather and the breathing pipe are connected by a flange. There are many screws between the two flanges, and there is no hanging mechanism on the breather. When disassembling the breather, multiple workers are required to cooperate to disassemble it, and it is difficult to support the breather when disassembling it through the breathing pipe, wasting manpower; when disassembling and replacing the discoloring silica gel in the breather, usually a convenience bag is sleeved at the outlet of the breathing pipe and tied with a rubber band. There are still many gaps between the bag mouth and the breathing pipe. During long-term operation, gas will enter the inside of the airbag, with poor sealing performance, affecting abnormal gas exchange and even polluting the insulating oil; the oil conservator and the transformer are connected by a pipeline to complete the flow of the insulating oil, and there is no filtering component inside the pipeline. Whether the oil flowing from the transformer to the oil conservator or from the oil conservator to the transformer produces impurities, such as debris caused by component aging and moisture that are not filtered and enter the inside of the transformer, it is easy to cause partial discharge. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides an oil conservator for a transformer.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: An oil conservator for a transformer, comprising a bracket and an oil storage mechanism installed on the bracket. A pressure relief mechanism and a filtering mechanism are installed on the oil storage mechanism. A fixing mechanism is installed on the pressure relief mechanism, and a breathing mechanism is installed on the fixing mechanism; the pressure relief mechanism includes a connecting head and a breathing pipe. The connecting head is installed on the oil storage mechanism, and the breathing pipe is installed on the connecting head. The bottom end of the breathing pipe is fixedly connected to a connecting plate; the breathing mechanism includes an upper flange, and the bottom of the connecting plate is attached to the upper flange; the fixing mechanism includes a top plate, and the breathing pipe is slidably connected to the top plate. A rotating sleeve threadedly connected to the breathing pipe is rotatably connected to the top plate. Two fixing shafts are relatively fixedly connected to the upper flange. Two gripping plates are rotatably connected to the two fixing shafts. Two buckling grooves are relatively formed on the top plate. Two fixing columns located inside the buckling grooves are relatively fixedly connected to the top plate. The two gripping plates are respectively buckled on the two fixing columns.

[0006] Specifically, the fixing mechanism further includes a limiting rod. Two limiting rods are relatively fixedly connected to the connecting plate, and the two limiting rods are in a hexagonal prism structure.

[0007] Specifically, the fixing mechanism further includes a steering wheel and an ear plate. A steering wheel is installed on the rotating sleeve. The diameter of the steering wheel is smaller than the distance between the two limiting rods. Ear plates are welded on the surfaces of the two gripping plates. The cross-sections of the two ear plates are in an arc structure. The cross-section of the gripping plate is in a J-shaped structure.

[0008] Specifically, the pressure relief mechanism further includes a fixed seat and an airbag. An airbag is installed inside the oil storage mechanism. The airbag is connected to the connecting head. A plurality of fixed seats fixed to the oil storage mechanism are installed on the breathing pipe.

[0009] Specifically, the pressure relief mechanism further includes a limiting ring and a sealing ring. A limiting ring is welded to the bottom of the connecting plate. A sealing ring is adhered to the bottom of the connecting plate.

[0010] Specifically, the oil storage mechanism includes an oil conservator body. The oil conservator body is installed on the bracket. An oil quantity gauge and an exhaust valve are installed on the oil conservator body. The connecting head is fixed to the oil conservator body. The fixed seat is fixedly connected to the oil conservator body.

[0011] Specifically, the breathing mechanism further includes a glass cover. The bottom of the upper flange is fixedly connected to the glass cover. The bottom center of the upper flange with holes arranged in a central circumferential array is fixedly connected to a through bolt. The bottom of the glass cover is snap-connected to a lower flange. The through bolt penetrates the lower flange, and the lower flange and the through bolt are fixed by a nut. The inner part of the lower flange with holes arranged in a central circumferential array is threadedly connected to an outer oil cup. Sealing gaskets are provided between the lower flange and the glass cover and between the outer oil cup and the lower flange. An inner oil cup is provided at the bottom of the lower flange. The through bolt penetrates the inner oil cup, and the inner oil cup and the through bolt are fixedly connected by a nut. Multiple exhaust ports are equidistantly arranged on the surface of the outer oil cup.

[0012] Specifically, a sealing mechanism is provided on the limiting rod. The sealing mechanism includes a fixed block. A fixed block is slidably connected to one of the limiting rods. A cylindrical slide bar is slidably connected to the fixed block. The bottom of the slide bar is fixedly connected to a sealing plate. A plastic bag is sleeved on the sealing plate. The length of the slide bar is greater than the distance between the bottom of the connecting plate and the top of the top plate.

[0013] Specifically, multiple protection mechanisms are provided on the outer oil cup. The protection mechanisms include multiple guide rails. Multiple guide rails are equidistantly arranged at the bottom of the outer oil cup at the exhaust ports. A net plate located at the bottom of the exhaust port is slidably connected between two arc-shaped guide rails in the same group.

[0014] Specifically, a filtering mechanism is provided on the oil pillow body. The filtering mechanism includes a delivery pipe. The bottom of the oil pillow body is connected to the delivery pipe. Two valves are installed on the delivery pipe. The bottom side of the delivery pipe is connected to a fixed pipe. The fixed pipe is located between the two valves. A filter screen is installed between the fixed pipe and the delivery pipe. A sealing plug is fixed inside the fixed pipe by screws. The sealing plug abuts against the bottom of the filter screen. Two semi-circular storage cavities are symmetrically opened on the sealing plug with respect to the filter screen.

[0015] The beneficial effects of the present invention are:

[0016] (1) An oil conservator for a transformer according to the present invention is provided with a pressure relief mechanism on the oil conservator body, and a breathing mechanism is installed on the pressure relief mechanism through a fixing mechanism. When it is found during maintenance that the discoloring silica gel inside the glass cover has changed color and needs to be replaced, the rotating sleeve can be rotated to drive the top plate to descend. When the top plate descends, the two gripping plates will also descend accordingly. Then, the upper flange on the gripping plate is separated from the connecting plate at the bottom of the breathing pipe. Continuing to rotate the rotating sleeve increases the distance between the upper flange and the connecting plate. The whole process only requires one inspector to operate, without the need for multiple inspectors to hold the glass cover. When the rotating sleeve rotates and descends, the glass cover can be suspended on the fixed column on the top plate through the gripping plate, saving manpower. When it is rotated to a certain position, the two ear plates can be held to remove the gripping plate from the fixed column to complete the disassembly of the glass cover. During installation, only by hanging the gripping plate on the fixed column and rotating the rotating sleeve in the reverse direction can the upper flange be raised, and the upper flange is brought into contact with the connecting plate to complete the installation of the sealing mechanism.

[0017] (2) An oil conservator for a transformer according to the present invention is provided with a sealing mechanism on the top plate that is slidably connected to the limiting rod. In the normal state, the sealing plate rotates outside the connecting plate through the sliding rod with the connecting plate. When replacing the discoloring silica gel, the rotating sleeve drives the top plate to descend, and the fixed block on the limiting rod can also descend accordingly. After separating the gripping plate from the fixed column, the glass cover is disassembled. At this time, the hole at the bottom of the connecting plate is exposed. A disposable plastic bag is sleeved on the sealing plate, and the sealing plate is rotated to the bottom of the connecting plate. The rotating sleeve is rotated in the reverse direction to cause the top plate to rise. When the top plate rises, it drives the sealing plate to rise, thereby achieving the contact between the sealing plate and the connecting plate. The plastic bag increases the sealing performance of the breathing pipe, and can prevent gas from entering the airbag when replacing the discoloring silica gel inside the glass cover, affecting the air pressure exchange and polluting the insulating oil.

[0018] (3) An oil conservator for a transformer according to the present invention is provided with a filtering mechanism at the bottom of the oil conservator body. When the temperature inside the transformer changes, the oil inside will flow into the oil conservator body or flow in the reverse direction. A fixed pipe is provided on the conveying pipe, and a filter screen is installed between the fixed pipe and the conveying pipe. Whether the oil inside the transformer flows into the oil conservator body or the oil inside the oil conservator body flows into the transformer, it will be filtered by the filter screen. The filtered substances fall into the internal storage cavity, and the storage cavity on the sealing plug is lower than the height of the conveying pipe, preventing sundries from entering the transformer and causing partial discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the connection structure of the top plate, rotating sleeve and connecting plate of the present invention;

[0022] Figure 3 Schematic diagram of the connection structure of the fixed shaft, grasping plate and fixed column of the present invention;

[0023] Figure 4 Schematic diagram of the connection structure of the glass cover, lower flange and outer oil cup of the present invention;

[0024] Figure 5 Schematic diagram of the connection structure of the connecting plate, breathing pipe and limiting ring of the present invention;

[0025] Figure 6 Schematic diagram of the connection structure of the connecting plate, grasping plate and ear plate of the present invention;

[0026] Figure 7 Schematic diagram of the connection structure of the outer oil cup, exhaust port and guide rail of the present invention;

[0027] Figure 8 Schematic diagram of the connection structure of the sliding rod, fixed block and sealing plate of the present invention;

[0028] Figure 9 Schematic diagram of the connection structure of the oil conservator, conveying pipe and airbag of the present invention;

[0029] Figure 10 Schematic diagram of the connection structure of the conveying pipe, fixed pipe and filter screen of the present invention;

[0030] Figure 11 Schematic diagram of the connection structure of the fixed pipe, sealing plug and filter screen of the present invention;

[0031] Figure 12 Schematic diagram of the connection structure of the sealing plug, storage cavity and filter screen of the present invention.

[0032] In the figure: 1. Bracket; 2. Oil storage mechanism; 201. Oil conservator body; 202. Oil level gauge; 203. Exhaust valve; 3. Pressure relief mechanism; 301. Connector; 302. Breathing pipe; 303. Fixed seat; 304. Connecting plate; 305. Limiting ring; 306. Sealing ring; 307. Airbag; 4. Fixing mechanism; 401. Steering wheel; 402. Top plate; 403. Rotating sleeve; 404. Buckling groove; 405. Fixed shaft; 406. Grasping plate; 407. Limiting rod; 408. Fixed column; 409. Ear plate; 5. Breathing mechanism; 501. Glass cover; 502. Lower flange; 503. Outer oil cup; 504. Upper flange; 505. Through bolt; 506. Inner oil cup; 507. Exhaust port; 508. Sealing gasket; 6. Sealing mechanism; 601. Plastic bag; 602. Sealing plate; 603. Sliding rod; 604. Fixed block; 7. Filtering mechanism; 701. Conveying pipe; 702. Valve; 703. Fixed pipe; 704. Filter screen; 705. Sealing plug; 706. Storage cavity; 8. Protection mechanism; 801. Guide rail; 802. Mesh plate. Detailed implementation manners

[0033] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0034] Such as Figures 1 - 12As shown in the figure, an oil conservator for a transformer according to the present invention includes a bracket 1 and an oil storage mechanism 2 installed on the bracket 1. A pressure relief mechanism 3 and a filtering mechanism 7 are installed on the oil storage mechanism 2. A fixing mechanism 4 is installed on the pressure relief mechanism 3, and a breathing mechanism 5 is installed on the fixing mechanism 4. The pressure relief mechanism 3 includes a connector 301 and a breathing pipe 302. The connector 301 is installed on the oil storage mechanism 2, and the breathing pipe 302 is installed on the connector 301. The bottom end of the breathing pipe 302 is fixedly connected to a connecting plate 304. The breathing mechanism 5 includes an upper flange 504, and the bottom of the connecting plate 304 is attached to the upper flange 504. The fixing mechanism 4 includes a top plate 402. The top plate 402 is slidably connected to the breathing pipe 302. A rotating sleeve 403 that is threadedly connected to the breathing pipe 302 is rotatably connected to the top plate 402. Two fixing shafts 405 are relatively fixedly connected to the upper flange 504. Two gripping plates 406 are rotatably connected to the two fixing shafts 405 respectively. Two buckling grooves 404 are relatively formed on the top plate 402. Two fixing columns 408 located inside the buckling grooves 404 are relatively fixedly connected to the top plate 402. The two gripping plates 406 are respectively buckled on the two fixing columns 408. The fixing mechanism 4 further includes a limiting rod 407. Two limiting rods 407 are relatively fixedly connected to the connecting plate 304, and the two limiting rods 407 are in the shape of a hexagonal prism. The fixing mechanism 4 further includes a steering wheel 401 and an ear plate 409. The steering wheel 401 is installed on the rotating sleeve 403. The diameter of the steering wheel 401 is smaller than the distance between the two limiting rods 407. Ear plates 409 are welded to the surfaces of the two gripping plates 406 respectively. The cross section of the two ear plates 409 is in an arc shape, and the cross section of the gripping plate 406 is in a J shape. The pressure relief mechanism 3 further includes a fixed seat 303 and an air bag 307. The air bag 307 is installed inside the oil storage mechanism 2. The air bag 307 is connected to the connector 301. A plurality of fixed seats 303 fixed to the oil storage mechanism 2 are installed on the breathing pipe 302. The pressure relief mechanism 3 further includes a limiting ring 305 and a sealing ring 306. The limiting ring 305 is welded to the bottom of the connecting plate 304, and the sealing ring 306 is adhesively bonded to the bottom of the connecting plate 304. The oil storage mechanism 2 includes an oil conservator body 201. The oil conservator body 201 is installed on the bracket 1. An oil level gauge 202 and an exhaust valve 203 are installed on the oil conservator body 201. The connector 301 is fixed to the oil conservator body 201, and the fixed seat 303 is fixedly connected to the oil conservator body 201. The breathing mechanism 5 further includes a glass cover 501. The glass cover 501 is fixedly connected to the bottom of the upper flange 504. A through screw 505 is fixedly connected to the center of the bottom of the upper flange 504 with holes arranged in a central circumferential array. The bottom of the glass cover 501 is snap-connected to a lower flange 502. The through screw 505 passes through the lower flange 502, and the lower flange 502 and the through screw 505 are fixed by a nut.The internal thread of the lower flange 502 with circumferentially arrayed openings at the center is connected to an external oil cup 503. Sealing gaskets 508 are provided between the lower flange 502 and the glass cover 501, and between the external oil cup 503 and the lower flange 502. An internal oil cup 506 is provided at the bottom of the lower flange 502. The through bolt 505 passes through the internal oil cup 506, and the internal oil cup 506 and the through bolt 505 are fixedly connected by a nut. Multiple groups of exhaust ports 507 are equidistantly arranged on the surface of the external oil cup 503. When installing the oil conservator body 201, it can be fixed to the top of the transformer through the bracket 1. The delivery pipe 701 is installed between the transformer and the oil conservator body 201 to be responsible for the exchange of oil. When the temperature inside the transformer rises, the oil inside flows into the interior of the oil conservator body 201. When the temperature inside the transformer drops, the oil inside the oil conservator body 201 flows into the interior of the transformer. The airbag 307 inside the oil conservator body 201 will also be compressed or expanded due to the inflow and outflow of the oil. The gas in the airbag 307 will be discharged to the internal oil cup 506 through the breather pipe 302. Since the external oil cup 503 is filled with insulating oil, when the breather pipe 302 exhausts, the oil inside the external oil cup 503 will bubble, indicating that the airbag 307 is working properly. The discoloring silica gel inside the glass cover 501 can be used to filter the gas entering the breather pipe 302, absorb moisture, and prevent moisture from entering the interior of the airbag 307 to contaminate the oil. During maintenance, the discoloring silica gel inside the glass cover 501 can be observed. If the discoloring silica gel changes color, it needs to be replaced. When replacing, the glass cover 501 needs to be removed and the lower flange 502 needs to be opened for replacement. When removing the glass cover 501, only one maintenance personnel is required to operate. Hold and rotate the steering wheel 401 to drive the rotation and descent of the rotating sleeve 403 on the outer wall of the breather pipe 302. Since the rotating sleeve 403 is rotatably connected to the top plate 402, when the rotating sleeve 403 descends, the top plate 402 will also descend. Since the top plate 402 is limited by the limiting rod 407 on the connecting plate 304, it will not rotate randomly when the top plate 402 descends. When the top plate 402 descends, since the gripping plate 406 on the fixed shaft 405 is buckled with the fixed column 408, the descent of the top plate 402 will also drive the upper flange 504 on the gripping plate 406 to descend. When the upper flange 504 is separated from the connecting plate 304, the removal of the glass cover 501 is completed. Continue to rotate the steering wheel 401 to increase the distance between the connecting plate 304 and the upper flange 504. At this time, the two gripping plates 406 are still hanging on the fixed column 408, and there is no need for another maintenance personnel to hold the glass cover 501 by hand, which is convenient for operation. After stopping the rotation of the rotating sleeve 403, the maintenance personnel can hold the two ear plates 409 with both hands and remove the gripping plate 406 from the fixed column 408 to complete the removal of the glass cover 501. After removal, the external oil cup 503 at the bottom of the lower flange 502 is removed and cleaned, and new insulating oil is poured in. Further, the nut on the through bolt 505 is removed. At this time, the internal oil cup 506 at the bottom of the lower flange 502 can be taken out.Continue to remove the nut on the through bolt 505 to disassemble the lower flange 502. After disassembly, separate the lower flange 502 from the glass cover 501. After separation, the discolored silica gel inside the glass cover 501 can be poured out. Check whether the holes on the upper flange 504 are blocked. If blocked, clean them. Then pour new discolored silica gel into the inside of the glass cover 501. Pass the lower flange 502 through the through bolt 505 and fasten it to the glass cover 501. The sealing gasket 508 increases the connection tightness between the glass cover 501 and the lower flange 502. Install the inner oil cup 506 at the bottom of the lower flange 502. Keep the glass cover 501 in a vertical state, and then thread-connect the outer oil cup 503 to the lower flange 502. When installing, hold the two ear plates 409 and fasten the two gripping plates 406 to the two fixing posts 408 on the top plate 402. Rotate the steering wheel 401 in the reverse direction to reverse and raise the rotating sleeve 403. At this time, the gripping plate 406 drives the upper flange 504 to move towards the bottom of the connecting plate 304. After they come into contact, they are limited by the limiting ring 305. The sealing ring 306 increases the connection tightness between the two. It does not require multiple workers for maintenance, saving manpower.

[0035] Specifically, refer to Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, a sealing mechanism 6 is provided on the limiting rod 407. The sealing mechanism 6 includes a fixed block 604. The fixed block 604 is slidably connected to one of the limiting rods 407. A sliding rod 603 with a cylindrical structure is slidably connected to the fixed block 604. A sealing plate 602 is fixedly connected to the bottom of the sliding rod 603. A plastic bag 601 is sleeved on the sealing plate 602. The length of the sliding rod 603 is greater than the distance between the bottom of the connecting plate 304 and the top of the top plate 402. When the connecting plate 304 is separated from the upper flange 504, the hole at the bottom of the connecting plate 304 is exposed. In order to prevent the atmosphere from entering the inside of the breathing pipe 302 and causing unstable air pressure or contaminating the oil body, it is necessary to seal the hole at the bottom of the connecting plate 304. When the glass cover 501 is disassembled, the top plate 402 is in a descending state. Then, the fixed block 604 on the top plate 402 will also descend with the descent of the top plate 402. When the fixed block 604 descends, the sealing plate 602 is at the bottom of the connecting plate 304. A disposable plastic bag 601 is sleeved on the sealing plate 602, and then the sealing plate 602 is rotated to the bottom opening of the connecting plate 304. Rotating the steering wheel 401 causes the rotating sleeve 403 to drive the top plate 402 to rise. Further, the fixed block 604 will also drive the sealing plate 602 to rise to seal the hole at the bottom of the connecting plate 304, preventing gas from entering the inside of the airbag 307 and causing unstable air pressure and contaminating the oil body. When the glass cover 501 needs to be installed, rotate the steering wheel 401 to drive the top plate 402 to descend. Further, the sealing plate 602 is separated from the connecting plate 304, and then the sealing plate 602 is rotated to the side of the connecting plate 304 without affecting the installation of the upper flange 504, and the disposable plastic bag 601 is removed for disposal.

[0036] Specifically, referring to Figure 4 and Figure 7 As shown, a plurality of protection mechanisms 8 are provided on the outer oil cup 503. The protection mechanisms 8 include a plurality of guide rails 801. A plurality of guide rails 801 are equidistantly arranged at the bottom of the outer oil cup 503 at the exhaust ports 507. A net plate 802 located at the bottom of the exhaust port 507 is slidably connected between two arc-shaped guide rails 801 in the same group. When the airbag 307 is working normally, the gas inside will be discharged into the breathing pipe 302 and finally discharged from the inner oil cup 506. Then, when the breathing pipe 302 needs to inhale to reset the airbag 307, air will enter and exit through the exhaust port 507. A net plate 802 is provided at the bottom of each exhaust port 507 to filter the air, preventing the holes at the inner oil cup 506 and the lower flange 502 from being blocked, and also preventing the gas from contaminating the oil body. When the net plate 802 needs to be cleaned, hold the net plate 802 and slide it out along the guide rail 801 for cleaning.

[0037] Specifically, referring to Figure 1 、 Figure 9 、 Figure 10 、 Figure 11 andFigure 12 As shown, a filtering mechanism 7 is provided on the conservator body 201. The filtering mechanism 7 includes a conveying pipe 701. The bottom of the conservator body 201 is connected to the conveying pipe 701. Two valves 702 are installed on the conveying pipe 701. A fixed pipe 703 is connected to the bottom side of the conveying pipe 701. The fixed pipe 703 is located between the two valves 702. A filter screen 704 is installed between the fixed pipe 703 and the conveying pipe 701. A sealing plug 705 is fixed inside the fixed pipe 703 by screws. The sealing plug 705 abuts against the bottom of the filter screen 704. Two semi-circular storage cavities 706 are symmetrically formed on the sealing plug 705 with respect to the filter screen 704. When the temperature inside the transformer changes, the insulating oil inside it will flow into the conservator body 201, or the oil inside the conservator body 201 will supplement the inside of the transformer. No matter which direction the oil flows, it will be filtered by the filter screen 704 between the fixed pipe 703 and the conveying pipe 701. The impurities in the oil are filtered by the filter screen 704 and then fall into the storage cavities 706 on the sealing plug 705 for collection, avoiding partial discharge of the transformer caused by sundries. When cleaning the sundries inside the sealing plug 705, the screws at the bottom of the sealing plug 705 can be removed. Before removal, close the two valves 702 to avoid gas entering the inside of the transformer and the conservator body 201.

[0038] When the present invention is in use, first, when installing the oil conservator body 201, it can be fixed to the top of the transformer through the bracket 1. The conveying pipe 701 is installed between the transformer and the oil conservator body 201 to be responsible for the exchange of oil. When the temperature inside the transformer rises, the oil inside it flows into the inside of the oil conservator body 201. When the temperature inside the transformer drops, the oil inside the oil conservator body 201 flows into the inside of the transformer. The airbag 307 inside the oil conservator body 201 will also be compressed or expanded due to the inflow and outflow of the oil. The gas in the airbag 307 will be discharged from the breather pipe 302 to the inner oil cup 506. Since the outer oil cup 503 is filled with insulating oil, when the breather pipe 302 exhausts, the oil inside the outer oil cup 503 will bubble, which can prove that the airbag 307 is working properly. The discoloring silica gel inside the glass cover 501 can be used to filter the gas entering the breather pipe 302 and absorb moisture to prevent moisture from entering the inside of the airbag 307 and contaminating the oil. During maintenance, the discoloring silica gel inside the glass cover 501 can be observed. If the discoloring silica gel changes color, it needs to be replaced. When replacing, the glass cover 501 needs to be removed and the lower flange 502 needs to be opened for replacement. When removing the glass cover 501, only one maintenance personnel is required to operate. Hold and rotate the steering wheel 401 to drive the rotating sleeve 403 on the outer wall of the breather pipe 302 to rotate and descend. Since the rotating sleeve 403 is rotatably connected to the top plate 402, when the rotating sleeve 403 descends, the top plate 402 will also descend. Since the top plate 402 is limited by the limiting rod 407 on the connecting plate 304, it will not rotate randomly when the top plate 402 descends. When the top plate 402 descends, since the gripping plate 406 on the fixed shaft 405 is buckled with the fixed column 408, the descent of the top plate 402 will also drive the upper flange 504 on the gripping plate 406 to descend. When the upper flange 504 is separated from the connecting plate 304, the removal of the glass cover 501 is completed. Continue to rotate the steering wheel 401 to increase the distance between the connecting plate 304 and the upper flange 504. At this time, the two gripping plates 406 are still hanging on the fixed column 408, and there is no need for another maintenance personnel to hold the glass cover 501 by hand, which is convenient for operation. After stopping rotating the rotating sleeve 403, the maintenance personnel hold the two ear plates 409 with both hands and remove the gripping plate 406 from the fixed column 408 to complete the removal of the glass cover 501. After removal, the outer oil cup 503 at the bottom of the lower flange 502 is removed and cleaned, and new insulating oil is poured in. Further, the nut on the through bolt 505 is removed. At this time, the inner oil cup 506 at the bottom of the lower flange 502 can be taken out. Continue to remove the nut on the through bolt 505 to remove the lower flange 502. After removal, the lower flange 502 is separated from the glass cover 501. After separation, the discoloring silica gel inside the glass cover 501 can be poured out. Check whether the holes on the upper flange 504 are blocked. If blocked, they need to be cleaned. Then pour new discoloring silica gel into the inside of the glass cover 501. Pass the lower flange 502 through the through bolt 505,It is buckled with the glass cover 501. The sealing gasket 508 increases the connection sealing performance between the glass cover 501 and the lower flange 502. The inner oil cup 506 is installed at the bottom of the lower flange 502. Keep the glass cover 501 in a vertical state, and then thread-connect the outer oil cup 503 with the lower flange 502. When installing, hold the two ear plates 409 and buckle the two gripping plates 406 onto the two fixing posts 408 on the top plate 402. Reverse-rotate the steering wheel 401 to reverse-rotate and raise the rotating sleeve 403. At this time, the gripping plate 406 drives the upper flange 504 to move towards the bottom of the connecting plate 304. After they come into contact, they are limited by the limiting ring 305. The sealing ring 306 increases the sealing performance of their connection. There is no need for multiple workers to perform maintenance, saving manpower;

[0039] Then, when the airbag 307 is working properly, it will discharge the internal gas into the internal part of the breathing pipe 302 and finally discharge it from the inner oil cup 506. Then, when the breathing pipe 302 needs to inhale air to reset the airbag 307, air will enter and exit through the exhaust port 507. A net plate 802 is provided at the bottom of each exhaust port 507 to filter the air, avoiding blockage of the holes at the inner oil cup 506 and the lower flange 502, and also avoiding gas pollution of the oil body. When the net plate 802 needs to be cleaned, hold the net plate 802 and slide it out along the guide rail 801 for cleaning; when the connecting plate 304 is separated from the upper flange 504, the holes at the bottom of the connecting plate 304 are exposed. In order to prevent the atmosphere from entering the internal part of the breathing pipe 302 and causing unstable air pressure or polluting the oil body, it is necessary to seal the holes at the bottom of the connecting plate 304. When the glass cover 501 is disassembled, the top plate 402 is in a descending state. Then, the fixing block 604 on the top plate 402 will also descend as the top plate 402 descends. When the fixing block 604 descends, the sealing plate 602 is at the bottom of the connecting plate 304. A disposable plastic bag 601 is sleeved on the sealing plate 602, and then the sealing plate 602 is rotated to the bottom opening of the connecting plate 304. Rotate the steering wheel 401 to make the rotating sleeve 403 drive the top plate 402 to rise. Further, the fixing block 604 will also drive the sealing plate 602 to rise to seal the holes at the bottom of the connecting plate 304, preventing gas from entering the internal part of the airbag 307 and causing unstable air pressure and polluting the oil body. When the glass cover 501 needs to be installed, rotate the steering wheel 401 to drive the top plate 402 to descend. Further, the sealing plate 602 is separated from the connecting plate 304, and then the sealing plate 602 is rotated to the side of the connecting plate 304 without affecting the installation of the upper flange 504, and the disposable plastic bag 601 is taken off for disposal;

[0040] Finally, when the temperature inside the transformer changes, the insulating oil inside it will flow into the interior of the conservator body 201, or the oil inside the conservator body 201 will supplement the interior of the transformer. No matter which direction the oil flows, it will be filtered by the filter screen 704 between the fixed pipe 703 and the delivery pipe 701. After the impurities in the oil are filtered by the filter screen 704, they will fall into the interior of the storage cavity 706 on the sealing plug 705 for collection, preventing debris from causing partial discharge of the transformer. When cleaning the debris inside the sealing plug 705, the screws at the bottom of the sealing plug 705 can be removed. Before removal, close the two valves 702 to prevent gas from entering the interior of the transformer and the conservator body 201.

[0041] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0042] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An oil conservator for a transformer, characterized in that, It includes a bracket (1) and an oil storage mechanism (2) installed on the bracket (1). A pressure relief mechanism (3) and a filtering mechanism (7) are installed on the oil storage mechanism (2). A fixing mechanism (4) is installed on the pressure relief mechanism (3), and a breathing mechanism (5) is installed on the fixing mechanism (4). The pressure relief mechanism (3) includes a connector (301) and a breathing tube (302). The connector (301) is installed on the oil storage mechanism (2), and the breathing tube (302) is installed on the connector (301). The bottom end of the breathing tube (302) is fixedly connected to a connecting plate (304). The breathing mechanism (5) includes an upper flange (504), and the bottom of the connecting plate (304) is attached to the upper flange (504). The fixing mechanism (4) includes a top plate (402). The breathing tube (302) is slidably connected to the top plate (402). A rotating sleeve (403) that is threadedly connected to the breathing tube (302) is rotatably connected to the top plate (402). Two fixing shafts (405) are relatively fixedly connected to the upper flange (504). Two gripping plates (406) are rotatably connected to the two fixing shafts (405). Two buckling grooves (404) are relatively formed on the top plate (402). Two fixing columns (408) located inside the buckling grooves (404) are relatively fixedly connected to the top plate (402). The two gripping plates (406) are respectively buckled on the two fixing columns (408).

2. The oil conservator for a transformer according to claim 1, wherein: The fixing mechanism (4) further includes a limiting rod (407). Two limiting rods (407) are relatively fixedly connected to the connecting plate (304), and the two limiting rods (407) are in a hexagonal prism structure.

3. A transformer oil conservator according to claim 1, characterized in that: The fixing mechanism (4) further includes a steering wheel (401) and an ear plate (409). The steering wheel (401) is installed on the rotating sleeve (403). The diameter of the steering wheel (401) is smaller than the distance between the two limiting rods (407). Ear plates (409) are welded on the surfaces of the two gripping plates (406). The cross sections of the two ear plates (409) are in an arc structure, and the cross section of the gripping plate (406) is in a J-shaped structure.

4. A transformer oil conservator according to claim 1, characterized in that: The pressure relief mechanism (3) further includes a fixing seat (303) and an airbag (307). The airbag (307) is installed inside the oil storage mechanism (2). The airbag (307) is connected to the connector (301). A plurality of fixing seats (303) fixed to the oil storage mechanism (2) are installed on the breathing tube (302).

5. A transformer oil conservator according to claim 1, characterized in that: The pressure relief mechanism (3) further includes a limiting ring (305) and a sealing ring (306). The limiting ring (305) is welded to the bottom of the connecting plate (304), and the sealing ring (306) is adhesively bonded to the bottom of the connecting plate (304).

6. A transformer oil conservator according to claim 4, characterized in that: The oil storage mechanism (2) includes an oil conservator body (201). The oil conservator body (201) is installed on the bracket (1). An oil level gauge (202) and an exhaust valve (203) are installed on the oil conservator body (201). The connector (301) is fixed to the oil conservator body (201), and a fixed seat (303) is fixedly connected to the oil conservator body (201).

7. A transformer oil conservator according to claim 1, characterized in that: The breathing mechanism (5) further includes a glass cover (501). The glass cover (501) is fixedly connected to the bottom of the upper flange (504). A through bolt (505) is fixedly connected to the center of the bottom of the upper flange (504) with holes arranged in a central circumferential array. The bottom of the glass cover (501) is snap-connected to a lower flange (502). The through bolt (505) passes through the lower flange (502), and the lower flange (502) and the through bolt (505) are fixed by a nut. An outer oil cup (503) is threadedly connected inside the lower flange (502) with holes arranged in a central circumferential array. Sealing gaskets (508) are provided between the lower flange (502) and the glass cover (501) and between the outer oil cup (503) and the lower flange (502). An inner oil cup (506) is provided at the bottom of the lower flange (502). The through bolt (505) passes through the inner oil cup (506), and the inner oil cup (506) and the through bolt (505) are fixedly connected by a nut. A plurality of groups of exhaust ports (507) are equidistantly arranged on the surface of the outer oil cup (503).

8. A transformer oil conservator according to claim 2, characterized in that: A sealing mechanism (6) is provided on the limiting rod (407). The sealing mechanism (6) includes a fixed block (604). The fixed block (604) is slidably connected to one of the limiting rods (407). A cylindrical sliding rod (603) is slidably connected to the fixed block (604). A sealing plate (602) is fixedly connected to the bottom of the sliding rod (603). A plastic bag (601) is sleeved on the sealing plate (602). The length of the sliding rod (603) is greater than the distance between the bottom of the connecting plate (304) and the top of the top plate (402).

9. A transformer oil conservator according to claim 7, characterized in that: A plurality of groups of protection mechanisms (8) are provided on the outer oil cup (503). The protection mechanisms (8) include a plurality of groups of guide rails (801). A plurality of groups of guide rails (801) are equidistantly arranged at the bottom of the outer oil cup (503) at the exhaust ports (507). A net plate (802) located at the bottom of the exhaust port (507) is slidably connected between two arc-shaped guide rails (801) in the same group.

10. A transformer oil conservator according to claim 6, characterized in that: A filtering mechanism (7) is provided on the conservator body (201). The filtering mechanism (7) includes a conveying pipe (701). The bottom of the conservator body (201) is connected to the conveying pipe (701). Two valves (702) are installed on the conveying pipe (701). A fixed pipe (703) is connected to the bottom side of the conveying pipe (701). The fixed pipe (703) is located between the two valves (702). A filter screen (704) is installed between the fixed pipe (703) and the conveying pipe (701). A sealing plug (705) is fixed inside the fixed pipe (703) by screws. The sealing plug (705) abuts against the bottom of the filter screen (704). Two semicircular storage cavities (706) are symmetrically formed on the sealing plug (705) with respect to the filter screen (704).

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