A power transformer

Abstract

The present invention relates to the technical field of transformers, in particular to a power transformer, comprising an oil tank, a heat dissipation component installed on the surface of the oil tank, an oil drain port provided at the left end of the oil tank, a separation component provided in the oil tank, the separation component comprising a guide rod, a scraper frame, a separation frame and a separation plate, the separation frame being installed in the oil tank, a plurality of guide rods being installed between the separation frame and the oil tank, the scraper frame being slidably connected on the circumferential surface of the guide rod and being slidably connected to the inner wall of the oil tank, the plurality of separation plates being rotatably connected in the separation frame via a rotating shaft, a filter hole being provided on the surface of the separation plate, a pair of rotating seats being installed on the inner wall of the oil tank, a threaded rod being rotatably connected between the rotating seat and the separation frame, and the scraper frame being threadedly connected to the threaded rod. The present invention, through the function of the separation component, completes the cleaning and discharge of oil impurities, while allowing most of the oil impurities to be discharged first, and distinguishes and collects them from the subsequent clearer oil impurities, so as to facilitate subsequent recycling and treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and more particularly to a power transformer. Background Art

[0002] An oil-immersed transformer is a type of transformer that relies on oil as a cooling medium. It generally consists of two parts: the transformer body and the oil tank. It usually uses three cooling methods: oil-immersed self-cooling, oil-immersed air-cooling, and forced oil circulation. Oil-immersed transformers have the characteristics of strong heat dissipation performance, low manufacturing and maintenance costs, and easy recycling. They are suitable for outdoor use and relatively harsh environments, such as places that require waterproofing, on poles, outdoors, etc.

[0003] The shortcomings of the existing technology: The presence of impurities and scum in the oil inside the oil-immersed transformer is a common problem. The metal parts inside the transformer, such as copper coils and iron cores, will wear due to long-term vibration and thermal expansion. The metal particles generated by these wears will be mixed into the cooling oil. Dust, moisture, microorganisms, etc. in the air may also enter the transformer cooling oil through loose seals and become a source of impurities. Therefore, the cooling oil in the transformer needs to be drained and replaced regularly. However, when replacing the oil in the existing technology, only the valve on the oil drain port is opened to drain the oil. The impurities and oil stains adhering to the inner wall of the oil tank, the inner wall of the heat dissipation fins and the bottom of the oil tank cannot be effectively discharged. Over time, they will accumulate thicker and thicker, thereby affecting the normal use of the transformer and the heat dissipation effect of the transformer. For this reason, we propose a power transformer. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a power transformer to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an electric transformer comprises an oil tank, a heat dissipation component is installed on the surface of the oil tank, an oil drain port is provided at the left end of the oil tank, a box cover is installed at the upper end of the oil tank, an iron core frame is installed at the lower end of the box cover, a high-voltage winding is installed in the iron core frame, a separation component is provided in the oil tank, the separation component comprises a guide rod, a scraper frame, a separation frame and a separation plate, the separation frame is installed in the oil tank, a plurality of the guide rods are installed between the separation frame and the oil tank, the scraper frame is slidably connected to the circumferential surface of the guide rod and is slidably connected to the inner wall of the oil tank, a plurality of separation plates are rotatably connected in the separation frame by a rotating shaft, a filter hole is opened on the surface of the separation plate, a pair of rotating seats are installed on the inner wall of the oil tank, a threaded rod is rotatably connected between the rotating seat and the separation frame, and the scraper frame is threadedly connected to the threaded rod.

[0006] Preferably, the upper ends of the threaded rods are equipped with card slots, a pair of drive shafts are rotatably connected in the box cover, the drive shafts are connected by a connecting sprocket set, and the lower ends of the drive shafts are equipped with card blocks, which are located in the card slots.

[0007] Preferably, gears are installed on the circumferential surfaces of the rotating shafts, a sliding frame is installed on the upper end of the separation frame, a rack is slidably connected to the circumferential surface of the sliding frame, a first spring is provided between the rack and the separation frame, and the racks are meshed with gears.

[0008] Preferably, a rotating rod, a support block and a limit block are installed on the surface of the scraper frame. The circumferential surface of the rotating rod is rotatably connected to a push rod. A second spring is installed between the push rod and the support block. The push rod is fitted with the limit block. A supporting block is installed on the upper end of the rack. The push rod is used to push the supporting block to control the movement of the rack.

[0009] Preferably, a plurality of guide shafts are installed between the separation frame and the oil tank, the scrapers slidingly connected on the circumferential surface of the guide shafts are slidingly connected to the oil tank and the separation plate, the screw rods rotatingly connected inside the oil tank and the separation frame are threadedly connected to the scrapers, and the initial position of the scrapers is away from the oil drain port.

[0010] Preferably, the heat dissipation assembly includes heat dissipation fins, connecting holes and cavities, a plurality of the heat dissipation fins are installed on the surface of the oil tank, a plurality of the connecting holes are opened on the inner wall of the oil tank, the cavities are arranged in the heat dissipation fins, the interior of the oil tank is connected to the cavity, a pair of linkage rods are rotatably connected in the heat dissipation fins, a plurality of spoilers are installed on the circumferential surface of the linkage rods, the spoilers are located in the heat dissipation fins and are slidably connected to the heat dissipation fins.

[0011] Preferably, a fixing frame is installed at the lower end of the heat dissipation fin, a heat dissipation motor is installed in the fixing frame, a driving rod is installed at the output end of the heat dissipation motor, and fan blades are installed on the circumferential surface of the driving rod.

[0012] Preferably, a first bevel gear is installed on the circumferential surface of the driving rod, a connecting shaft is rotatably connected in the fixed frame, a second bevel gear installed on the circumferential surface of the connecting shaft is meshed with the first bevel gear, the connecting shaft and the linkage rod are connected through a reduction sprocket set, and the linkage rods are connected through a synchronization sprocket set.

[0013] Technical effects and advantages of the present invention:

[0014] 1. The present invention controls the scraper frame to move downward, and the oil and dirt impurities on the inner wall of the oil tank can be scraped and cleaned during the descent process. At the same time, when the scraper frame moves downward to the extreme position, the multiple separation plates are controlled to rotate and flip over, so that most of the oil and dirt impurities accumulated on the inner wall of the oil tank and the oil and dirt impurities accumulated on the surface of the separation plate can be moved to the space below the separation frame. When the oil drain port is opened, the scraper is controlled to move to the left. When the scraper moves to the extreme position to the left, the oil and dirt impurities below the separation frame are basically discharged together with the cooling oil. When the scraper is reset, the cooling oil above the separation frame will flow downward through the filter holes opened on the surface of the separation plate, and the remaining small amount of oil and dirt impurities will be intercepted on the separation plate. While completing the cleaning and discharge of the oil and dirt impurities, most of the oil and dirt impurities are discharged first, and are distinguished and collected from the subsequent clearer oil, which is convenient for subsequent recycling and treatment.

[0015] 2. The present invention uses the function of the heat dissipation fins to allow the cooling oil in the oil tank to enter the cavity of the heat dissipation fins, and cools the cooling oil through the heat dissipation fins. The linkage rod is controlled to rotate, and the linkage rod drives multiple spoilers to rotate in the cavity of the heat dissipation fins. This not only improves the flow speed of the cooling oil in the heat dissipation fins, but also cleans the oil and impurities attached to the cavity of the heat dissipation fins, thereby preventing the oil and impurities from accumulating in the heat dissipation fins for a long time and forming an isolation film, which affects the cooling effect of the cooling oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic structural diagram of the present invention;

[0018] Figure 3 It is a schematic structural diagram of a front cross-section of the fuel tank of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the split high-voltage winding in the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the right side cross-section of the present invention;

[0021] Figure 6 This is a schematic structural diagram of a front-side cross-section of the fuel tank of the present invention;

[0022] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of part A;

[0023] Figure 8 It is a structural schematic diagram of the card slot and the card block in the present invention;

[0024] Figure 9 For the present invention Figure 8Schematic diagram of the structure of part B;

[0025] Figure 10 This is a schematic diagram of the structure when the push rod contacts the abutting block in the present invention;

[0026] Figure 11 For the present invention Figure 10 Schematic diagram of the structure of part C;

[0027] Figure 12 This is a schematic diagram of the structure of the push rod pushing the abutting block in the present invention;

[0028] Figure 13 For the present invention Figure 12 Schematic diagram of the structure of part D;

[0029] Figure 14 Schematic diagram of the structure of the scraper in the present invention;

[0030] Figure 15 It is a structural schematic diagram of the heat dissipation component in the present invention.

[0031] The accompanying drawings are marked as follows: 1. oil tank; 101. oil drain port; 102. tank cover; 103. core frame; 104. high-voltage winding; 2. heat dissipation assembly; 201. heat dissipation fins; 202. communication hole; 203. cavity; 204. linkage rod; 205. spoiler; 206. fixing frame; 207. heat dissipation motor; 208. drive rod; 209. fan blade; 2010. first bevel gear; 2011. connecting shaft; 2012. second bevel gear; 2013. reduction sprocket assembly; 2014. synchronous sprocket assembly; 3. separation assembly; 301. Separation frame; 302, guide rod; 303, scraper frame; 304, separation plate; 305, rotating shaft; 306, filter hole; 307, rotating seat; 308, threaded rod; 4, slot; 401, drive shaft; 402, connecting sprocket set; 403, clamping block; 5, gear; 501, sliding frame; 502, rack; 503, first spring; 504, rotating rod; 505, push rod; 506, support block; 507, second spring; 508, limit block; 509, holding block; 6, guide shaft; 601, scraper; 602, screw rod. DETAILED DESCRIPTION

[0032] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The power transformer involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work fall within the scope of protection of the present invention.

[0033] like Figure 1-11As shown, in one embodiment, a power transformer is proposed, including an oil tank 1, a heat dissipation component 2 is installed on the surface of the oil tank 1, an oil drain port 101 is provided at the left end of the oil tank 1, a tank cover 102 is installed at the upper end of the oil tank 1, an iron core frame 103 is installed at the lower end of the tank cover 102, a high-voltage winding 104 is installed in the iron core frame 103, a separation component 3 is provided in the oil tank 1, and the separation component 3 includes a guide rod 302, a scraper frame 303, a separation frame 301 and a separation plate 304, and the separation frame 301 is installed in the oil tank 1. , multiple guide rods 302 are installed between the separation frame 301 and the oil tank 1, the scraper frame 303 is slidably connected to the circumferential surface of the guide rod 302 and is slidably connected to the inner wall of the oil tank 1, multiple separation plates 304 are rotatably connected to the separation frame 301 through the rotating shaft 305, and filter holes 306 are provided on the surface of the separation plate 304. A pair of rotating seats 307 are installed on the inner wall of the oil tank 1, and a threaded rod 308 is rotatably connected between the rotating seat 307 and the separation frame 301, and the scraper frame 303 is threadedly connected to the threaded rod 308.

[0034] When the embodiment of the present invention is actually used and the cooling oil in the oil tank 1 needs to be replaced, the pair of threaded rods 308 are controlled to rotate simultaneously. Through the cooperation of the guide rod 302, the scraper frame 303 can be driven to move downward to scrape off the oily impurities attached to the inner wall of the oil tank 1. When the scraper frame 303 moves slowly downward, the scraped oily impurities are driven to fall together. When the scraper frame 303 is about to fall to the limit position, multiple separation plates 304 will rotate and turn over in the separation frame 301 at the same time. During the flipping process of the separation plates 304, some oily impurities scraped off the inner wall of the oil tank 1 by the scraper frame 303 can be driven. When the scraper frame 303 is completely lowered to the limit position, the multiple separation plates 304 are flipped over, and most of the accumulated oil and dirt impurities attached to the inner wall of the oil tank 1 and the accumulated oil and dirt impurities on the surface of the separation plates 304 can be moved to the space below the separation frame 301. The oil drain port 101 can be opened to discharge the cooling oil in the oil tank 1, and the impurities in the oil tank 1 can be cleaned and discharged at the same time. The cooling oil containing a large amount of oil and dirt impurities can be discharged in advance and discharged in stages separately from the relatively clear cooling oil in the upper layer of the oil tank 1, which is convenient for subsequent differentiation and processing of the cooling oil.

[0035] like Figure 8 and 9 As shown, in one embodiment, a card slot 4 is installed at the upper end of the threaded rod 308, a pair of drive shafts 401 are rotatably connected in the box cover 102, and the drive shafts 401 are connected by a connecting sprocket set 402, and a card block 403 is installed at the lower end of the drive shaft 401, and the card block 403 is located in the card slot 4.

[0036] In actual application of the embodiment of the present invention, when the tank cover 102 is installed on the oil tank 1, the block 403 will be inserted into the slot 4. When the cooling oil in the oil tank 1 needs to be discharged and replaced, one of the drive shafts 401 is controlled to rotate. The drive shaft 401 drives a pair of threaded rods 308 to rotate simultaneously through the action of the connecting sprocket set 402, which will control the scraper frame 303 to move downward, thereby achieving the effect of scraping and cleaning the oil and impurities attached to the inner wall of the oil tank 1.

[0037] like Figure 6 and 7 As shown, in one embodiment, the circumferential surface of the rotating shaft 305 is installed with a gear 5, the upper end of the separation frame 301 is installed with a sliding frame 501, the circumferential surface of the sliding frame 501 is slidably connected with a rack 502, and a first spring 503 is provided between the rack 502 and the separation frame 301, and the rack 502 is meshed with the gear 5.

[0038] When the embodiment of the present invention is actually used, the first spring 503 pushes the rack 502 to the leftmost position, limits the gear 5, the rotating shaft 305 and the gear 5, so that one side of the separation plate 304 faces upward, and the surface of the separation plate 304 is used to adhere to the accumulated oil and impurities precipitated downward in the cooling oil. When the cooling oil needs to be replaced, the rack 502 can be controlled to move to the right, and at the same time drive multiple gears 5 to rotate. The gear 5 drives the rotating shaft 305 and the separation plate 304 to rotate, so that the accumulated oil and impurities adhered to the surface of the separation plate 304 are turned over and moved to the space below the separation frame 301. When discharging the cooling oil, most of the oil and impurities can be discharged first, so that the cooling oil discharged subsequently is clearer and can be further used after simple filtration.

[0039] like Figure 10-13 As shown, in one embodiment, a rotating rod 504, a support block 506 and a limit block 508 are installed on the surface of the scraper frame 303. The circumferential surface of the rotating rod 504 is rotatably connected to a push rod 505. A second spring 507 is installed between the push rod 505 and the support block 506. The push rod 505 is fitted with the limit block 508. A supporting block 509 is installed on the upper end of the rack 502. The push rod 505 is used to push the supporting block 509 to control the movement of the rack 502.

[0040] When the embodiment of the present invention is actually used, as the scraper frame 303 slowly moves downward, the second spring 507 pushes one side of the rotating rod 504, and at the same time the limit block 508 limits the other side of the rotating rod 504, so that the rotation angle of the rotating rod 504 can be fixed. As the scraper frame 303 descends, the rotating rod 504 contacts the abutting block 509, and the rotating rod 504 is forced to rotate, pushing the abutting block 509 to move to the right, thereby driving the rack 502 to move to the right, so that the multiple gears 502 can rotate synchronously. When the scraper frame 303 is lowered to the limit position, the multiple separation plates 304 can be controlled to rotate 180 degrees at the same time to achieve the effect of flipping the direction, so that the side of the separation plate 304 where the impurities are accumulated and attached moves to the bottom of the separation frame 301. At the same time, part of the oil impurities scraped off from the inner wall of the oil tank 1 by the scraper frame 303 will move to the bottom of the separation frame 301 together with the rotation of the separation plate 304. When the oil drain port 101 is opened, most of the oil impurities are discharged first and are distinguished and collected from the subsequent clearer oil.

[0041] like Figure 12 and 14 As shown, in one embodiment, a plurality of guide shafts 6 are installed between the separation frame 301 and the oil tank 1, a scraper 601 slidingly connected on the circumferential surface of the guide shaft 6 is slidingly connected to the oil tank 1 and the separation plate 304, a screw rod 602 rotatably connected inside the oil tank 1 and the separation frame 301 is threadedly connected to the scraper 601, and the initial position of the scraper 601 is away from the oil drain port 101.

[0042] In actual application of the embodiment of the present invention, after the separation plate 304 is flipped in direction, the oil drain port 101 can be opened to discharge the cooling oil. At this time, the screw rod 602 is controlled to rotate, and the screw rod 602 drives the scraper 601 to move to the right. When the scraper 601 moves to the right, the oil and dirt impurities attached to the surface of the separation plate 304 can be scraped off, so that they can be discharged from the oil drain port 101 together with the cooling oil. When the scraper 601 moves to the left to the extreme position, the oil and dirt impurities below the separation frame 301 are basically discharged together with the cooling oil, and the scraper 601 at the leftmost position will block the oil drain port 101. At this time, there will be no cooling oil in the oil drain port 101. The cooling oil is discharged, and then the screw rod 602 is controlled to rotate in the opposite direction, driving the scraper 601 to reset. The cooling oil above the separation frame 301 will flow downward through the filter holes 306 opened on the surface of the separation plate 304, and be discharged from the oil drain port 101 after being filtered. A small amount of remaining oil and impurities will be intercepted on the separation plate 304. When the cooling oil is discharged, the scraper frame 303 is controlled to reset, and at the same time, the rack 502 is disengaged from the restriction of the rotating rod 504 and reset by the action of the first spring 503, while driving the separation plate 304 to rotate and reset. At this time, the oil and impurities intercepted on the separation plate 304 will move to the space below the separation frame 301 for isolation.

[0043] In one case of an embodiment of the present invention, when the cooling oil is discharged, the separation plate 304 will flip its direction when it is reset. When discharging the cooling oil, the oil impurities filtered and intercepted by the separation plate 304 will move to the space below the separation frame 301 as the separation plate 304 flips its direction. At this time, this part of the oil impurities can be isolated from the cooling oil above the separation frame 301 through the isolation of the separation plate 304. At the same time, the scraper 601 can be controlled to move to the left again to push this part of the oil impurities to the oil drain port 101, and finally discharged to the outside through the oil drain port 101.

[0044] like Figure 1 、 5 , 6 and 15, in one embodiment, the heat dissipation assembly 2 includes heat dissipation fins 201, connecting holes 202 and cavities 203, multiple heat dissipation fins 201 are installed on the surface of the oil tank 1, multiple connecting holes 202 are opened on the inner wall of the oil tank 1, the cavities 203 are arranged in the heat dissipation fins 201, the interior of the oil tank 1 is connected to the cavity 203, a pair of linkage rods 204 are rotatably connected in the heat dissipation fins 201, and multiple spoilers 205 are installed on the circumferential surface of the linkage rods 204. The spoilers 205 are located in the heat dissipation fins 201 and are slidably connected to the heat dissipation fins 201.

[0045] When the embodiment of the present invention is actually used, the cooling oil in the oil tank 1 can enter the cavity 203 of the heat dissipation fins 201 through the action of the heat dissipation fins 201. The cooling oil is cooled by the heat dissipation fins 201. Driven by the temperature difference, the cooling oil has a reduced density of hot oil and floats up, while the cold oil sinks and is replenished, forming a natural flow. However, the natural flow of the cooling oil is relatively slow, resulting in a poor cooling effect of the cooling oil by the heat dissipation fins 201. The linkage rod 204 can be controlled to rotate, and the linkage rod 204 drives multiple spoilers 205 to rotate in the cavity 203 of the heat dissipation fins 201, which can not only increase the flow speed of the cooling oil in the heat dissipation fins 201, but also clean the oil impurities attached to the cavity 203 of the heat dissipation fins 201, thereby preventing the oil impurities from accumulating in the heat dissipation fins 201 for a long time and forming an isolation film, which affects the cooling effect of the cooling oil.

[0046] like Figure 1 、 5 As shown in FIG15 , in one embodiment, a fixing frame 206 is installed at the lower end of the heat dissipation fin 201 , a heat dissipation motor 207 is installed in the fixing frame 206 , a driving rod 208 is installed at the output end of the heat dissipation motor 207 , and a fan blade 209 is installed on the circumferential surface of the driving rod 208 .

[0047] When the embodiment of the present invention is actually used, the heat dissipation motor 207 is controlled to operate, and the heat dissipation motor 207 drives the driving rod 208 to rotate, and the driving rod 208 drives the fan blades 209 to rotate, thereby promoting air circulation between the heat dissipation fins 201 and improving the cooling efficiency of the heat dissipation fins 201 for the cooling oil.

[0048] like Figure 1 、 5 As shown in Figure 15, in one embodiment, a first bevel gear 2010 is installed on the circumferential surface of the driving rod 208, a connecting shaft 2011 is rotatably connected in the fixed frame 206, a second bevel gear 2012 installed on the circumferential surface of the connecting shaft 2011 is engaged with the first bevel gear 2010, the connecting shaft 2011 and the linkage rod 204 are connected by a reduction sprocket set 2013, and the linkage rods 204 are connected by a synchronization sprocket set 2014.

[0049] In actual application of the embodiment of the present invention, when the driving rod 208 rotates, the driving rod 208 drives the connecting shaft 2011 to rotate through the first bevel gear 2010 and the second bevel gear 2012, and the connecting shaft 2011 can drive the linkage rod 204 to rotate at a slower speed through the reduction sprocket set 2013. At the same time, the pair of linkage rods 204 are rotated synchronously through the synchronization sprocket set 2014, and the spoiler 205 of the linkage rod 204 rotates slowly in the heat dissipation fin 201, thereby controlling the flow rate of the cooling oil therein and improving the cooling efficiency of the cooling oil.

[0050] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0051] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0052] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A power transformer, comprising an oil tank (1), characterized in that: The oil tank (1) is provided with a heat dissipation component (2) on its surface, an oil drain port (101) is provided at the left end of the oil tank (1), a tank cover (102) is provided at the upper end of the oil tank (1), an iron core frame (103) is provided at the lower end of the tank cover (102), a high-voltage winding (104) is provided in the iron core frame (103), a separation component (3) is provided in the oil tank (1), the separation component (3) comprises a guide rod (302), a scraper frame (303), a separation frame (301) and a separation plate (304), the separation frame (301) is provided in the oil tank (1), a plurality of the guide rods (302) and a separation frame (301) are provided in the oil tank (1), and the plurality of the guide rods (303) and the separation frame (301) are provided in the oil tank (1). 2) installed between the separation frame (301) and the oil tank (1), the scraper frame (303) is slidably connected to the circumferential surface of the guide rod (302) and is slidably connected to the inner wall of the oil tank (1), a plurality of separation plates (304) are rotatably connected to the separation frame (301) via a rotating shaft (305), a filter hole (306) is provided on the surface of the separation plate (304), a pair of rotating seats (307) are installed on the inner wall of the oil tank (1), a threaded rod (308) is rotatably connected between the rotating seat (307) and the separation frame (301), and the scraper frame (303) is threadedly connected to the threaded rod (308); The upper ends of the threaded rods (308) are each provided with a card slot (4), a pair of drive shafts (401) are rotatably connected in the box cover (102), the drive shafts (401) are connected via a connecting sprocket set (402), and the lower ends of the drive shafts (401) are each provided with a card block (403), the card block (403) being located in the card slot (4); The circumferential surface of the rotating shaft (305) is equipped with a gear (5), the upper end of the separation frame (301) is equipped with a sliding frame (501), the circumferential surface of the sliding frame (501) is slidably connected to a rack (502), a first spring (503) is provided between the rack (502) and the separation frame (301), and the rack (502) is meshed with the gear (5); A rotating rod (504), a supporting block (506) and a limiting block (508) are installed on the surface of the scraping frame (303); a push rod (505) is rotatably connected to the circumferential surface of the rotating rod (504); a second spring (507) is installed between the push rod (505) and the supporting block (506); the push rod (505) is fitted with the limiting block (508); a supporting block (509) is installed on the upper end of the rack (502); the push rod (505) is used to push the supporting block (509) to control the movement of the rack (502).

2. A power transformer according to claim 1, characterized in that: A plurality of guide shafts (6) are installed between the separation frame (301) and the oil tank (1); a scraper (601) slidably connected on the circumferential surface of the guide shaft (6) is slidably connected to the oil tank (1) and the separation plate (304); a screw rod (602) rotatably connected inside the oil tank (1) and the separation frame (301) is threadedly connected to the scraper (601); and the initial position of the scraper (601) is away from the oil discharge port (101).

3. A power transformer according to claim 1, characterized in that: The heat dissipation assembly (2) comprises heat dissipation fins (201), communication holes (202) and cavities (203); a plurality of the heat dissipation fins (201) are mounted on the surface of the oil tank (1); a plurality of the communication holes (202) are opened on the inner wall of the oil tank (1); the cavities (203) are arranged in the heat dissipation fins (201); the interior of the oil tank (1) is connected to the cavities (203); a pair of linkage rods (204) are rotatably connected in the heat dissipation fins (201); a plurality of spoilers (205) are mounted on the circumferential surfaces of the linkage rods (204); the spoilers (205) are located in the heat dissipation fins (201) and are slidably connected to the heat dissipation fins (201).

4. A power transformer according to claim 3, characterized in that: A fixing frame (206) is installed at the lower end of the heat dissipation fin (201), a heat dissipation motor (207) is installed in the fixing frame (206), a driving rod (208) is installed at the output end of the heat dissipation motor (207), and a fan blade (209) is installed on the circumferential surface of the driving rod (208).

5. A power transformer according to claim 4, characterized in that: A first bevel gear (2010) is mounted on the circumferential surface of the driving rod (208); a connecting shaft (2011) is rotatably connected within the fixing frame (206); a second bevel gear (2012) mounted on the circumferential surface of the connecting shaft (2011) is meshed with the first bevel gear (2010); the connecting shaft (2011) and the linkage rod (204) are connected via a reduction sprocket set (2013); and the linkage rods (204) are connected via a synchronization sprocket set (2014).

Images