A breather for a transformer and its control method

Abstract

The present invention relates to a breather for a transformer and a control method thereof. The breather for the transformer includes an outer cylinder, an inner cylinder, and a breathing connecting pipe. An oil collecting assembly is arranged on the outer end surface of the chassis of the outer cylinder. The oil collecting cup of the oil collecting assembly is communicated with the transition cylinder only through the air seal piece air passage at the bottom end of the transition cylinder. The oil collecting cup is communicated with the outside through a first passage on the chassis. The inner cylinder is arranged inside the outer cylinder and is separated by a partition plate into a plurality of filter cavities for placing filter materials. The inner wall of the filter cavity opposite to the outer cylinder is thickened inward to form a convex lens. A one-way air passage is formed in the partition plate to enable one-way communication between adjacent filter cavities. The top end of the breathing passage of the breathing connecting pipe is communicated with the transformer, and the bottom end is communicated with the transition cylinder. The top end of the transition cylinder is communicated with the filter cavity located upstream and in one-way connection. The technical problem in the prior art that the utilization rate of the silica gel filter material in the breather is low and it is easily polluted by oil and gas is solved. The thickened inner wall of the filter cavity forms a convex lens to facilitate magnifying the filter material in the filter cavity during observation.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and particularly to a breather for a transformer and a control method thereof. Background Art

[0002] Power transformers are the most important equipment in the power grid and also the core equipment in substations. The breather is the main organ for the transformer oil tank to breathe, and the daily maintenance of the breather is related to the cleanliness of the insulating oil inside the main transformer. The filter material in the transformer breather is blue under normal conditions. During use, it needs to filter out moisture and impurities in the external air. After a period of time, it will reach a saturated state and turn light red at this time. When the discoloration reaches 2 / 3, it indicates that the adsorbent has become damp and needs to be replaced. This process requires regular inspections by operation and maintenance personnel and manual replacement. It is difficult for the human eye to distinguish the volume of the currently saturated moisture-absorbing silica gel, and it is also difficult to replace it in time when the moisture-absorbing silica gel changes color to 2 / 3. Traditional breathers also require the disassembly and replacement of silica gel, and the operation is cumbersome. Moreover, most of the silica gel is still in an unabsorbed state, but it is not easy to separate, and only the whole can be replaced, resulting in waste of discolored silica gel.

[0003] Traditional breathers have problems such as frequent replacement of discolored silica gel, narrow working space, inconvenient maintenance, long maintenance operation time, poor sealing, and breather blockage.

[0004] The silica gel of traditional breathers will crack due to saturated adsorption of moisture during the operation of the transformer. And the transformer oil in the transformer conservator will contain oil in the exhaled gas due to the increase in temperature or operating conditions, which will cause the drying cylinder to be contaminated with oil and form sludge, etc. And the exhaled gas will form bubbles in the oil collecting cup after passing through the oil seal piece, and the rupture of the bubbles will cause the oil to splash through the filter holes and enter the inside of the drying cylinder, resulting in the occurrence of transformer breather blockage from time to time. Breather blockage may cause internal negative pressure or internal pressure increase. In the case of severe negative pressure, a large amount of air may enter the main transformer body, causing the oil level to drop, leading to the operation of the gas protection and causing the transformer to trip. Excessive internal pressure may cause the operation of the transformer pressure relief device, resulting in transformer oil spraying. Summary of the Invention

[0005] In order to solve the technical problems of low utilization rate of the breather silica gel filter material, easy contamination by oil and gas, and inconvenient observation in the prior art, the present application proposes a breather for a transformer and a control method thereof, which solve the above technical problems.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] The present invention provides a breather for a transformer, which is characterized by comprising: a transparent outer cylinder body, the top of the outer cylinder body is connected to the transformer, the bottom is configured with a chassis, and an oil collecting assembly is configured on the outer end surface of the chassis. The oil collecting assembly includes an oil collecting cup and a transition cylinder disposed in the oil collecting cup. The oil collecting cup and the transition cylinder are only communicated through an oil seal sheet air passage at the bottom end of the transition cylinder. At the same time, the oil collecting cup is communicated with the outside through a first passage on the chassis; a transparent inner cylinder body, the inner cylinder body is disposed in the outer cylinder body and is separated by a partition plate into a plurality of filter cavities for placing filter materials. The inner wall of the filter cavity opposite to the outer cylinder body is thickened inward to form a convex lens. A one-way air passage is formed in the partition plate to enable one-way communication between adjacent filter cavities; a breathing connecting pipe, the breathing connecting pipe is disposed in the center of the inner cylinder body. The top end of the breathing passage of the breathing connecting pipe is connected to the transformer, and the bottom end of the breathing passage is inserted into the top end of the transition cylinder and communicated with the transition cylinder. The top end of the transition cylinder is also communicated with the upstream filter cavity that is in one-way communication through a second passage partially located on the chassis. At the same time, when the breathing connecting pipe passes through the inner cylinder body, it is communicated with the downstream filter cavity that is in one-way communication through a one-way air inlet opened on the side wall, so that when the transformer inhales, the gas can only flow from the filter cavity to the breathing passage. A one-way air outlet is configured at the bottom of the breathing connecting pipe, so that when the transformer exhales, the gas can only flow from the breathing passage to the transition cylinder.

[0008] Further, one-way air valves are configured in the one-way air passage of the partition plate, at the one-way air inlet and the one-way air outlet of the breathing connecting pipe. The one-way air valve includes: a housing, both ends of the housing are open, and a vertically extending flow passage is formed in the housing; a ball, the ball is restricted to move in the flow passage; a supporting member, the supporting member is disposed in the flow passage, and only a gas blocking hole for the ball to cooperate after descending is opened on the supporting member. After the gas blocking hole cooperates with the ball, the flow passage is closed; a blocking member, the blocking member is disposed in the flow passage and located at the top of the supporting member. The blocking member blocks the ascending ball and still leaves a gap in the flow passage after blocking the ball.

[0009] Further, it further includes a feed channel and a discharge channel. The feed channel is obliquely disposed at the top of the outer cylinder body and penetrates into the filter cavity of the inner cylinder body. The discharge channel is disposed at the bottom of the outer cylinder body and penetrates into the filter cavity of the inner cylinder body.

[0010] Further, a lower baffle is disposed on the surface of the chassis of the outer cylinder body that cooperates with the oil collecting assembly. The lower baffle is fixedly connected to the breathing manifold through a central hole located at the center of the circle. A through hole adapted to the size of the second channel is formed in the disk body of the lower baffle, and the through hole forms part of the second channel. At the same time, the first channel is also formed on the lower baffle.

[0011] Further, the bottom of each filter chamber is formed into an inclined discharge surface with a corner seam, and the lowest point of the corner seam of the discharge surface communicates with the discharge channel through a through port.

[0012] Further, a plurality of air through holes are formed on the discharge surface, and the air through holes form part of the second channel.

[0013] Further, the inner cylinder body is configured to be rotatable.

[0014] Further, the inner cylinder body is fixedly connected to the chassis of the outer cylinder body.

[0015] Further, the inlet of the one-way air passage in the partition plate is formed at the top of the partition plate, and the outlet of the one-way air passage is formed at the bottom of the partition plate.

[0016] Further, the air through holes on the discharge surface, and the opening parts of the inlet and outlet of the one-way air passage are all vertically downward.

[0017] Further, regular tetrahedron parts arranged in a cross pattern are disposed at the air through holes on the discharge surface, and at the inlet and outlet of the one-way air passage, and the downward-facing surface of the regular tetrahedron part is open.

[0018] Further, an oil baffle is disposed at the inner wall of the oil collecting cup of the oil collecting assembly, and the oil baffle shields the outlet of the air passage of the oil seal sheet at the bottom end of the transition cylinder in the top view direction.

[0019] Further, a plurality of semi-circular grooves are formed on the surface of the oil seal sheet facing the outer cylinder body. The semi-circular grooves extend radially. A trachea bent once is assembled in the semi-circular grooves, and an air passage is formed in the trachea. One end of the air passage is vertically upwardly open and communicates with the transition cylinder, and the other end of the air passage is horizontally open and formed in the thickness part of the end plate at the bottom end of the transition cylinder.

[0020] Further, stripes embedded in the inner wall of the outer cylinder body are also included, and the stripes are arranged at positions relative to the partition plate.

[0021] Further, a color sensor for detecting whether the filter medium in the filter chamber fails is disposed at the position of the arc surface bottom of the outer cylinder body corresponding to one of the filter chambers.

[0022] Further, there are six filter cavities in the inner cylinder. When the transformer inhales gas, the gas enters from the first filter cavity located at the uppermost reaches, then sequentially passes through the second and third connected filter cavities and enters the breathing connecting pipe, and finally enters the transformer. Meanwhile, the color sensor is used to detect whether the moisture-absorbing silica gel of the filter material at the bottom of the third filter cavity changes color.

[0023] On the other hand, the present invention also provides a control method for a breather for a transformer, which is controlled by using the above-mentioned breather for a transformer. The control method is that the color sensor of the breather for a transformer performs color detection to check whether the moisture-absorbing silica gel of the filter material at the bottom of the filter cavity changes color: If yes, the color of the moisture-absorbing silica gel of the filter material has changed to light red, indicating that the moisture-absorbing silica gel of the filter material needs to be replaced. The color sensor sends an alarm signal to the upper computer, and the upper computer controls the inner cylinder to rotate in sequence to switch two filter cavities to face the color sensor and re-perform color detection, and enters the next cycle to continue color detection; If no, the color of the moisture-absorbing silica gel of the filter material is still blue, and the information feedback is that the moisture-absorbing silica gel of the filter material is normal, and enters the next cycle to continue color detection.

[0024] Based on the above technical solutions, the technical effects that the present invention can achieve are:

[0025] For the breather for a transformer provided by the present invention, when the gas exhaled by the transformer enters from the top end of the breathing connecting pipe, due to the one-way air intake openings on the side wall of the breathing connecting pipe, the gas does not pass through the filter cavity and directly enters the transition cylinder of the oil collecting assembly from the bottom end of the breathing connecting pipe, preventing oil and gas from polluting the filter material. Then, it enters the oil collecting cup through the oil seal sheet air passage at the bottom end of the transition cylinder, and is then exhaled to the outside through the first passage communicating with the outside on the chassis. When the transformer inhales, the outside gas enters the oil collecting cup through the first passage communicating with the outside on the chassis, enters the transition cylinder through the oil seal sheet air passage at the bottom end of the transition cylinder, and then sequentially passes through the top end of the transition cylinder and the second passage on the chassis and enters the filter cavity located upstream and in one-way connection for water absorption and filtration. Due to the design of the one-way connected filter cavities in the inner cylinder, after entering the filter cavity located upstream and in one-way connection, the outside gas can only pass through the downstream filter cavities one by one, and enters the breathing connecting pipe through the filter cavity connected to the breathing connecting pipe, and finally enters the transformer, thereby improving the utilization rate of the filter material and enhancing the filtering effect. In summary, the present invention solves the technical problems of low utilization rate of the silica gel filter material of the breather and easy pollution by oil and gas in the prior art; At the same time, the inner wall of the filter cavity opposite to the outer cylinder is thickened inward to form a convex lens, which can magnify the filter material during external observation for easy observation; Further, the arrangement of the oil seal sheet air passage enables the oil seal sheet to have not only small-diameter filter holes but also larger-diameter air passages, allowing oil bubbles to pass through, thereby avoiding blockage of the filter holes due to the rupture of air bubbles during transformer exhalation. Description of the Drawings

[0026] Figure 1 Schematic diagram of the overall structure of the breather for the transformer of the present invention;

[0027] Figure 2 Schematic diagram of the gas path when the transformer exhales gas;

[0028] Figure 3 Schematic diagram of the gas path when the transformer inhales gas;

[0029] Figure 4 Schematic diagram of the inner cylinder of the present invention;

[0030] Figure 5 Schematic diagram of the bottom of the inner cylinder of the present invention;

[0031] Figure 6 Schematic diagram of the partition plate of the inner cylinder of the present invention;

[0032] Figure 7 Cross-sectional view of the partition plate of the inner cylinder of the present invention;

[0033] Figure 8 Schematic diagram of the breathing connecting pipe of the present invention;

[0034] Figure 9 Schematic diagrams of the one-way gas valve in two states of the present invention;

[0035] Figure 10 Schematic diagram of the lower baffle of the outer cylinder of the present invention;

[0036] Figure 11 Cross-sectional schematic diagram of the lower baffle of the outer cylinder of the present invention;

[0037] Figure 12 Schematic diagram of an embodiment where the inner cylinder of the present invention has six filter chambers;

[0038] Figure 13 Schematic diagram of another embodiment where the inner cylinder of the present invention has six filter chambers;

[0039] Figure 14 Schematic diagram of an embodiment where the inner cylinder of the present invention has four filter chambers;

[0040] Figure 15 Schematic diagram of the oil seal sheet air duct of the present invention;

[0041] Figure 16 Logic control diagram of the breather for the transformer of the invention.

[0042] Wherein: 1 - outer cylinder body, 11 - chassis, 111 - first channel, 112 - second channel, 113 - lower baffle, 1131 - through hole, 1132 - central hole, 114 - handle, 115 - filler, 116 - support, 12 - oil collecting assembly, 121 - oil collecting cup, 1211 - oil baffle, 122 - transition cylinder, 1221 - oil seal piece, 1222 - air duct, 13 - flange, 14 - stripe; 2 - inner cylinder body, 21 - partition plate, 211 - one-way air passage, 22 - filter cavity, 221 - discharging surface, 2211 - air vent, 2212 - through port, 23 - regular tetrahedron part; 3 - breathing connecting pipe, 31 - breathing channel, 32 - one-way air inlet, 33 - one-way air outlet, 34 - through screw; 4 - one-way air valve, 41 - housing, 42 - ball, 43 - supporting part, 431 - air blocking hole, 44 - blocking part; 5 - feeding channel, 51 - discharging channel; 6 - color sensor. Detailed implementation mode

[0043] Such as Figures 1-15As shown in the figure, the present invention provides a breather for a transformer, which includes an outer cylinder 1, an inner cylinder 2 and a breathing connecting pipe 3. The top of the outer cylinder 1 is connected to the transformer through a flange 13, and a chassis 11 is arranged at the bottom. An oil collecting assembly 12 is arranged on the outer end face of the chassis 11. The oil collecting assembly 12 includes an oil collecting cup 121 and a transition cylinder 122 arranged in the oil collecting cup 121. The oil collecting cup 121 and the transition cylinder 122 are only connected through an air passage 1222 of an oil seal piece 1221 at the bottom end of the transition cylinder 122. At the same time, the oil collecting cup 121 is connected to the outside through a first passage 111 on the chassis 11. The inlet of the first passage 111 is at the position on the outer end face of the chassis 11 enveloped by the oil collecting cup 121, and the outlet of the first passage 111 is at the position on the outer end face of the chassis 11 not enveloped by the oil collecting cup 121 or on the side surface of the chassis 11 in the vertical direction. The inner cylinder 2 is arranged inside the outer cylinder 1 and is separated by a partition plate 21 into a plurality of filter cavities 22 for placing filter materials. A one-way air passage 211 is formed in the partition plate 21 to enable one-way communication between adjacent filter cavities 22. The breathing connecting pipe 3 is arranged in the center of the inner cylinder 2. A through bolt 34 is arranged at the center of the breathing connecting pipe 3. A breathing passage 31 is arranged on the outer periphery of the through bolt 34. The top end of the breathing passage 31 is connected to the transformer, and the bottom end of the breathing passage 31 is inserted into the top end of the transition cylinder 122 and is connected to the transition cylinder 122. The top end of the transition cylinder 122 is also connected to the filter cavity 22 located upstream and in one-way communication through a second passage 112 on the chassis 11. The inlet of the second passage 112 is at the position on the chassis 11 enveloped by the transition cylinder 122, the aisle of the second passage 112 is outside the bottom of the filter cavity 22, and the outlet of the second passage 112 is at the bottom of the filter cavity 22. At the same time, when the breathing connecting pipe 3 passes through the inner cylinder 2, it is connected to the filter cavity 22 located downstream and in one-way communication through a one-way air inlet 32 opened on the side wall. There are two one-way air inlets 32 in this example, so that when the transformer inhales, the gas can only flow from the filter cavity 22 to the breathing passage 31. A one-way air outlet 33 is arranged at the bottom of the breathing connecting pipe 3, so that when the transformer exhales, the gas can only flow from the breathing passage 31 to the transition cylinder 122.

[0044] For the convenience of observation, the side walls of the outer cylinder 1 and the inner cylinder 2 are both made of transparent materials. The material of the partition plate 21 can be stainless steel, galvanized steel, aluminum alloy, high manganese steel, polyurethane elastomer or cemented carbide material, and the material needs to have the characteristics of high strength and high wear resistance. The inner wall of the filter cavity 22 opposite to the outer cylinder 1 is thickened inward to form a convex lens. Specifically, the way of thickening the inner wall inward is as Figure 10As shown in the figure, in a specific embodiment of the present invention, the inner cylinder 2 is divided into six filter chambers 22. The inner surface of the inner cylinder 2 before being divided by the partition plate 21 is a regular hexahedron, so that a convex lens is formed on the side wall of each filter chamber 22 of the inner cylinder 2. When observed from the outside, the filter material can be magnified for easy observation. To further facilitate observation, stripes 14 are embedded in the inner wall of the outer cylinder 1. The stripes 14 are arranged at positions relative to the partition plate 21. Further, stripes 14 are arranged at each vertex of the regular hexahedron on the outside of the inner cylinder 2 for easy color comparison. The RGB color of the stripes 14 can be yellow in the range of (210, 210, 0) to (255, 255, 0). Further, a color sensor 6 for detecting whether the filter material in the filter chamber 22 fails is arranged at the bottom of the arc surface of the outer cylinder 1 corresponding to one of the filter chambers 22. The color sensor 6 can wirelessly transmit an alarm signal using Wi-Fi, Bluetooth, cellular mobile communication, or ultra-wideband technology, and transmit the signal to the upper computer to control the rotation of the inner cylinder 2. As Figure 11 As shown in the figure, in another specific embodiment of the present invention, the inner cylinder 2 is divided into six filter chambers 22. The inner wall of the filter chamber 22 bulges inward to form a convex lens with a shorter focal length to facilitate increasing the magnification and is more conducive to observation. As Figure 12 As shown in the figure, in yet another specific embodiment of the present invention, the inner cylinder 2 is divided into four filter chambers 22. Compared with the six filter chambers 22, the convex lens formed on the side wall of each filter chamber 22 has a shorter focal length and a larger magnification. At the same time, the number of partition plates 21 is saved, and the manufacturing cost is low, but the utilization rate of the moisture-absorbing silica gel is slightly reduced.

[0045] In a specific embodiment of the present invention, one-way air valves 4 are arranged in the one-way air passage 211 of the partition plate 21, at the one-way air inlet 32 and the one-way air outlet 33 of the breathing connecting pipe 3 to achieve one-way gas flow. The one-way air valve 4 includes a housing 41, a ball 42, a supporting member 43, and a blocking member 44. Both ends of the housing 41 are open, and a vertically extending flow channel is formed in the housing 41. The ball 42 is restricted to move in the flow channel. The supporting member 43 is arranged in the flow channel. Only a gas blocking hole 431 for the ball 42 to fit after descending is opened on the supporting member 43. After the gas blocking hole 431 cooperates with the ball 42, the flow channel is closed. The blocking member 44 is U-shaped, arranged in the flow channel and located at the top of the supporting member 43. The blocking member 44 blocks the rising ball 42, and there is still a gap in the flow channel after blocking the ball 42. Specifically, when the gas flows from the supporting member 43 to the blocking member 44, the ball 42 is pushed back and fits on the blocking member 44, and the gas passes through the gas blocking hole 431 and can flow in the flow channel of the housing 41. On the contrary, when the gas flows from the blocking member 44 to the supporting member 43, the ball 42 is pushed back and fits on the supporting member 43, blocking the gas blocking hole 431, and the gas cannot pass through the gas blocking hole 431 and cannot flow in the flow channel of the housing 41.

[0046] It should be noted that when the transformer exhales outward, although the gas seems to be able to pass out through the second channel 112 and the air passage 1222 of the oil seal piece 1221 at the bottom end of the transition cylinder 122 after entering the transition cylinder 122, in fact, due to the ball 42 of the one-way air valve 4 in the one-way air passage 211 of the partition plate 21, it will be pushed by the gas just exhaled from the transformer and block the air blocking hole 431. And the driving force of the gas entering the transition cylinder 122 on the ball 42, that is, the force to push the ball 42 out of the air blocking hole 431 is significantly less than the force to push the ball 42 towards the air blocking hole 431. Therefore, during the outward exhalation of the transformer, the air pressure in the filter chamber 22 is high, and the gas entering the transition cylinder 122 is not easy to enter the filter chamber 22 through the second channel 112, but flows out from the air passage 1222 of the oil seal piece 1221 at the bottom end of the transition cylinder 122.

[0047] For the convenience of material replacement, it further includes a feed channel 5 and a discharge channel 51. The feed channel 5 is disposed obliquely on the top of the outer cylinder body 1 and penetrates into the filter chamber 22 of the inner cylinder body 2. The discharge channel 51 is disposed at the bottom of the outer cylinder body 1 and penetrates into the filter chamber 22 of the inner cylinder body 2. The openings of the feed channel 5 and the discharge channel 51 exposed at the mouth of the outer cylinder body 1 are sealed by bolts with seals. In a specific embodiment of the present invention, the feed channel 5 and the discharge channel 51 are arranged on the same vertical line, and a pair of feed channel 5 and discharge channel 51 are configured for each filter chamber 22. In another specific embodiment of the present invention, the feed channel 5 and the discharge channel 51 are arranged on the same vertical line, and a pair is configured for the entire inner cylinder body 2. The inner cylinder body 2 is configured to be rotatable, and different filter chambers 22 are rotated to the positions of the feed channel 5 and the discharge channel 51 for material replacement. The breather for the transformer of the present invention replaces the previous method of entire disassembly through the feed channel 5 and the discharge channel 51, and solves the technical problems of narrow working space, inconvenient maintenance, long maintenance operation time, and incomplete sealing existing in the previous replacement operation.

[0048] In a specific embodiment of the present invention, a lower baffle 113 is disposed on the surface of the chassis 11 of the outer cylinder body 1 that cooperates with the oil collecting assembly 12. The lower baffle 113 is fixedly connected to the breathing connecting pipe 3 through a central hole 1132 located at the center of the circle. A through hole 1131 adapted to the size of the second channel 112 is formed on the disk body of the lower baffle 113. The through hole 1131 forms a part of the second channel 112 to ensure that when the transformer inhales inward, the gas only enters one filter chamber 22. At the same time, the first channel 111 is also formed on the lower baffle 113. There are multiple first channels 111. Both ends of the first channel 111 are configured to open downward. One opening communicates with the outside, and the other opening communicates with the transition cylinder 122. The middle section of the first channel 111 extends along the radial direction of the lower baffle 113.

[0049] In a specific embodiment of the present invention, the bottom of each filter chamber 22 is formed as an inclined discharge surface 221 with a folded seam, and the lowest point of the folded seam of the discharge surface 221 communicates with the discharge channel 51 through a through port 2212. Further, there are two surfaces at the bottom, and the lowest point of the joint of the two surfaces communicates with the discharge channel 51.

[0050] In a specific embodiment of the present invention, a plurality of air holes 2211 are formed on the discharge surface 221, and the air holes 2211 form part of the second channel 112.

[0051] In the present invention, the inner cylinder 2 is configured to be rotatable. The driving mode of the inner cylinder 2 can be to configure a rack at the bottom of the inner cylinder 2, and the rack is engaged with the output gear of the motor to drive the inner cylinder 2 to rotate.

[0052] In a specific embodiment of the present invention, a handle 114 is configured on the vertical side surface of the chassis 11 of the outer cylinder 1. The chassis 11 of the outer cylinder 1 is fixedly connected to the inner cylinder 2, and the inner cylinder 2 is driven to rotate by pushing the handle 114. Further, a filling member 115 fixedly connected to the chassis 11 is configured on the inner end surface of the chassis 11 of the outer cylinder 1. The filling member 115 is an annular body, and the surface of the annular body facing the inner cylinder 2 protrudes in regions to fill the space between the chassis 11 and the inner cylinder. A support member 116 is configured between the filling member 115 and the bottom of the filter chamber 22 to form part of the second channel 112.

[0053] In a specific embodiment of the present invention, the inlet of the one-way air passage 211 in the partition plate 21 is formed at the top of the partition plate 21, and the outlet of the one-way air passage 211 is formed at the bottom of the partition plate 21. Specifically, the gas coming from the second channel 112 first enters the upstream first filter chamber 22 through the bottom of the filter chamber 22, flows from the bottom to the top of the first filter chamber 22, and then enters the one-way air passage 211 through the inlet at the top of the partition plate 21 of the one-way air passage 211, flows from the top to the bottom of the one-way air passage 211, and then enters the bottom of the adjacent second filter chamber 22 through the outlet at the bottom of the partition plate 21 of the one-way air passage 211, and so on, until it enters the filter chamber 22 communicating with the breathing joint pipe 3, and flows back into the breathing joint pipe 3 through the one-way suction port 32 and finally back into the transformer.

[0054] In order to prevent the silica gel filter material from blocking the outlet, the air holes 2211 on the discharge surface 221, and the opening parts of the inlet and outlet of the one-way air passage 211 are all vertically downward. Specifically, cross-arranged regular tetrahedron members 23 are configured at the air holes 2211 on the discharge surface 221, and at the inlet and outlet of the one-way air passage 211, and the downward-facing surface of the regular tetrahedron member 23 is open.

[0055] An oil baffle 1211 is disposed on the inner wall of the oil collecting cup 121 of the oil collecting assembly 12. The oil baffle 1211 blocks the outlet of the air passage 1222 of the oil seal piece 1221 at the bottom end of the transition cylinder 122 in the top view direction, which can prevent the bubbles in the oil collecting cup 121 from bursting when the transformer exhales and blocking the second channel 112.

[0056] In a specific embodiment of the present invention, a plurality of semi-circular grooves are formed on the surface of the oil seal piece 1221 facing the outer cylinder 1. The semi-circular grooves extend along the radial direction. A trachea bent once is assembled in the semi-circular grooves, and an air passage 1222 is formed in the trachea. One end of the air passage 1222 opens vertically upward and communicates with the transition cylinder 122, and the other end of the air passage 1222 opens horizontally and is formed in the thickness part of the bottom end plate of the transition cylinder 122. Further, the horizontally opening at the other end of the air passage 1222 can also protrude from the thickness part of the bottom end plate of the transition cylinder 122 in the horizontal direction and extend radially out of the bottom contour of the transition cylinder 122 to be better blocked by the oil baffle 1211. The extended air passage 1222 of the oil seal piece 1221 can further prevent the bubbles from bursting when the transformer exhales and blocking the second channel 112. At the same time, it can also reduce the material used for the oil seal piece 1221, but the manufacturing process is slightly improved.

[0057] In a specific embodiment of the present invention, the filter chamber 22 of the inner cylinder body 2 is six in number, with three in use and three in reserve. When the transformer inhales gas, the gas enters from the first filter chamber 22 located at the uppermost reaches, and then successively passes through the connected second and third filter chambers 22 and enters the breathing connecting pipe 3, and finally enters the transformer. At the same time, the color sensor 6 is used to detect whether the moisture-absorbing silica gel of the filter material at the bottom of the third filter chamber 22 changes color; the use of the partition plate 21 with a one-way flow function to divide the inner cylinder body 2 into six (or four or more) filter chambers 22 is to isolate the moisture-absorbing silica gel of the filter material in sections. In the traditional breather, when the moisture-absorbing silica gel of the filter material in the entire chamber changes color from bottom to top by 2 / 3 and fails, it needs to be replaced entirely (not replaced after all is used up, as moisture will enter if the replacement is not timely), resulting in waste of the moisture-absorbing silica gel of the filter material. In the present invention, only 3 separated filter chambers 22 separate the moisture-absorbing silica gel of the filter material at the same time. When the moisture-absorbing silica gel of the filter material in the front two filter chambers 22 completely changes color, the moisture-absorbing silica gel of the filter material at the bottom of the third filter chamber 22 begins to change color. After being detected by the color sensor 6, the inner cylinder body 2 is rotated to switch the third filter chamber 22 originally connected to the breathing connecting pipe 3 to the first filter chamber 22 connected to the second channel 112, and the originally fourth and fifth filter chambers 22 in reserve are put into use, and the moisture-absorbing silica gel of the filter material that has failed in the original first and second filter chambers 22 is replaced, thus saving 1 / 3 of the moisture-absorbing silica gel of the filter material that is not used in the traditional mode; during the process, the inhaled gas first enters from the bottom of the first filter chamber 22, passes through the chamber of the first filter chamber 22 from the bottom of the first filter chamber 22 to the top of the first filter chamber 22, and then enters the one-way gas passage 211 of the partition plate 21 from the upper air hole of the first filter chamber 22. Specifically, it enters from the inlet at the top of the partition plate 21 of the one-way gas passage 211, and then flows out from the outlet at the bottom of the partition plate 21 of the one-way gas passage 211 and enters the bottom of the chamber of the second filter chamber 22. The gas passes through the chamber of the second filter chamber 22 from the bottom of the second filter chamber 22 to the top of the second filter chamber 22, and then enters the one-way gas passage 211 of the partition plate 21 again, and so on. After the gas enters the third filter chamber 22, it will enter the breathing connecting pipe 3 through the one-way air inlet 32 connected to the third filter chamber 22, and then enter the transformer through the breathing connecting pipe 3.

[0058] In a specific embodiment of the present invention, as Figure 16As shown in the figure, the logical control method of the breather for the transformer of the present invention is as follows: when the working mode is turned on, the color sensor 6 performs color detection to check whether the moisture-absorbing silica gel in the filter chamber 22 has changed color. If so, and the color has changed to light red, it means that the moisture-absorbing silica gel needs to be replaced. The color sensor 6 sends an alarm signal to the upper computer, and the upper computer controls the inner cylinder 2 to rotate in sequence to switch the two filter chambers 22 to face the color sensor 6 again for color detection, and then enters the next cycle to continue color detection; during the stage of checking whether the moisture-absorbing silica gel in the filter chamber 22 has changed color, if not, and the color remains blue, the information feedback is that the moisture-absorbing silica gel is normal, and it enters the next cycle to continue color detection.

[0059] It should be understood that the specific embodiments described above are only used to explain the present invention and are not used to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A transformer respirator, characterized in that: include: A transparent outer cylinder (1), wherein the top of the outer cylinder (1) is connected to the transformer, and the bottom is provided with a chassis (11); an oil collecting assembly (12) is provided on the outer end surface of the chassis (11); the oil collecting assembly (12) comprises an oil collecting cup (121) and a transition tube (122) arranged in the oil collecting cup (121); the oil collecting cup (121) and the transition tube (122) are connected only through an air passage (1222) of an oil sealing sheet (1221) on the bottom end of the transition tube (122); and at the same time, the oil collecting cup (121) is connected with the outside through a first passage (111) on the chassis (11); A transparent inner cylinder (2), the inner cylinder (2) being arranged inside the outer cylinder (1) and being divided by a partition plate (21) into a plurality of filter cavities (22) for placing filter materials, the inner wall of the filter cavity (22) opposite to the outer cylinder (1) being thickened inwardly to form a convex lens, and a one-way air passage (211) being formed inside the partition plate (21) to enable one-way communication between adjacent filter cavities (22); A breathing tube (3) is arranged in the center of the inner cylinder (2); the top end of the breathing channel (31) of the breathing tube (3) is connected to the transformer; the bottom end of the breathing channel (31) is inserted into the top end of the transition tube (122) and is connected to the transition tube (122); the top end of the transition tube (122) is also connected to the filter chamber (22) located upstream and in one-way communication through a second channel (112) on the chassis (11) in part. At the same time, when passing through the inner cylinder (2), the breathing joint pipe (3) is connected to the filter chamber (22) located downstream and connected in one way through a one-way air inlet (32) provided on the side wall, so that when the transformer inhales, the gas can only flow from the filter chamber (22) to the breathing passage (31); and a one-way exhalation port (33) is arranged at the bottom of the breathing joint pipe (3), so that when the transformer exhales, the gas can only flow from the breathing passage (31) to the transition cylinder (122); Wherein, a one-way air valve (4) is arranged in the one-way air passage (211) of the partition plate (21) and at the one-way air inlet (32) and the one-way air exhalation outlet (33) of the breathing tube (3), and the one-way air valve (4) comprises: A shell (41), wherein both ends of the shell (41) are open, and a flow channel extending vertically is formed in the shell (41); A ball (42), wherein the ball (42) is restricted to move in the flow channel; A supporting member (43), the supporting member (43) being arranged in the flow channel, the supporting member (43) being provided with only an air blocking hole (431) for the ball (42) to engage with after it descends, and the flow channel being closed after the air blocking hole (431) engages with the ball (42); A blocking member (44) is arranged in the flow channel and is located on the top of the supporting member (43). The blocking member (44) blocks the rising ball (42) and still leaves a gap in the flow channel after blocking the ball (42).

2. The transformer respirator according to claim 1, characterized in that: It also includes a feed channel (5) and a discharge channel (51), wherein the feed channel (5) is arranged at an angle at the top of the outer cylinder (1) and penetrates into the filter chamber (22) of the inner cylinder (2), and the discharge channel (51) is arranged at the bottom of the outer cylinder (1) and penetrates into the filter chamber (22) of the inner cylinder (2).

3. The transformer respirator according to claim 2, characterized in that: A lower baffle (113) is arranged on the surface of the chassis (11) of the outer cylinder (1) that cooperates with the oil collecting assembly (12); the lower baffle (113) is fixedly connected to the breathing tube (3) via a central hole (1132) located at the center of the circle; a through hole (1131) corresponding to the size of the second channel (112) is opened on the plate body of the lower baffle (113); the through hole (1131) is formed as a part of the second channel (112); and at the same time, the first channel (111) is also formed on the lower baffle (113).

4. The transformer respirator according to claim 3, characterized in that: The bottom of each filter cavity (22) is formed as an inclined discharge surface (221) with a folded angle seam, and the lowest point of the folded angle seam of the discharge surface (221) is connected to the discharge channel (51) through a through opening (2212).

5. The transformer respirator according to claim 4, characterized in that: A plurality of air holes (2211) are provided on the discharge surface (221), and the air holes (2211) form part of the second channel (112).

6. The transformer respirator according to claim 5, characterized in that: The inner cylinder (2) is configured to be rotatable.

7. The transformer respirator according to claim 6, characterized in that: The inner cylinder (2) is fixedly connected to the chassis (11) of the outer cylinder (1).

8. The transformer respirator according to claim 7, characterized in that: The inlet of the one-way air passage (211) in the partition plate (21) is formed at the top of the partition plate (21), and the outlet of the one-way air passage (211) is formed at the bottom of the partition plate (21).

9. The transformer respirator according to claim 8, characterized in that: The air holes (2211) on the discharge surface (221), and the openings of the inlet and outlet of the one-way air passage (211) are all vertically downward.

10. The transformer respirator according to claim 9, characterized in that: The air holes (2211) on the discharge surface (221) and the inlet and outlet of the one-way air passage (211) are all provided with cross-arranged regular tetrahedrons (23), and the regular tetrahedrons (23) are open downward.

11. The transformer respirator according to claim 10, characterized in that: An oil baffle plate (1211) is arranged on the inner wall of the oil collecting cup (121) of the oil collecting assembly (12), and the oil baffle plate (1211) blocks the outlet of the air passage (1222) of the oil sealing plate (1221) on the bottom end of the transition tube (122) in a top view.

12. The transformer respirator according to claim 11, characterized in that: The oil seal plate (1221) is provided with a plurality of semicircular grooves on the surface facing the outer cylinder body (1), the semicircular grooves extending in the radial direction, an air pipe which has been bent once is installed in the semicircular grooves, and the air channel (1222) is formed in the air pipe, one end of the air channel (1222) opens vertically upward and communicates with the transition cylinder (122), and the other end of the air channel (1222) opens horizontally and is formed in the thickness portion of the end plate at the bottom end of the transition cylinder (122).

13. The transformer respirator according to claim 12, characterized in that: It also includes stripes (14) embedded in the inner wall of the outer cylinder (1), and the stripes (14) are arranged at a position relative to the partition plate (21).

14. The transformer respirator according to claim 13, characterized in that: A color sensor (6) for detecting whether the filter material in the filter cavity (22) is ineffective is arranged on the outer wall of the outer cylinder (1) at the bottom of the arc surface relative to one of the filter cavities (22).

15. The transformer respirator according to claim 14, characterized in that: The inner cylinder (2) has six filter chambers (22). When the transformer inhales gas, the gas enters from the first filter chamber (22) located at the most upstream, passes through the second and third filter chambers (22) connected to each other in sequence, enters the breathing pipe (3), and finally enters the transformer. At the same time, the color sensor (6) is used to detect whether the filter material hygroscopic silica gel at the bottom of the third filter chamber (22) changes color.

16. A control method for a transformer respirator, characterized in that: The transformer respirator according to claim 15 is used for control, wherein the control method is that the color sensor (6) of the transformer respirator performs color detection to check whether the filter material hygroscopic silica gel at the bottom of the third filter cavity (22) changes color: If the color of the filter material hygroscopic silica gel has turned light red, it means that the filter material hygroscopic silica gel needs to be replaced, and the color sensor (6) sends an alarm signal to the host computer, and the host computer controls the inner cylinder (2) to rotate in sequence to switch the two filter chambers (22) to face the color sensor (6) to re-perform color detection, and does not enter the next cycle to continue color detection; If not, the color of the filter material's hygroscopic silica gel is still blue, and the information feedback is that the filter material's hygroscopic silica gel is normal, and the next cycle is entered to continue color detection.

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