An oil-immersed three-phase transformer capable of timely flame retardancy

Abstract

The present invention relates to the technical field of three-phase transformers, and in particular to an oil-immersed three-phase transformer that can be flame-retardant in time, comprising a three-phase transformer body, a heat dissipation channel is provided on the side wall of the three-phase transformer body, a strip groove is provided at the center of the lower end of the three-phase transformer body, a heat dissipation plate is slidably installed inside the heat dissipation channel, a heat dissipation groove is provided on the side wall of the heat dissipation plate, a central groove is provided inside the heat dissipation plate, the central groove is connected to the heat dissipation groove, a card slot is provided in the inner wall of the central groove, a first inner groove is provided through the side wall of the heat dissipation plate, a circular groove is provided at the lower end of the heat dissipation plate, the circular groove is connected to the first inner groove, a dovetail block is slidably installed inside the dovetail groove, a fixed block is fixedly installed on the side wall of the dovetail block, and a rotating column is rotatably installed inside the fixed block, so that the heat dissipation plate can be automatically flipped over without disassembly when the device is in use, thereby facilitating cleaning of the interior thereof, thereby enhancing the dust removal effect of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of three-phase transformers, in particular to an oil-immersed three-phase transformer capable of timely flame retardancy. Background Art

[0002] In order to input different voltages, the input winding can also use multiple windings to adapt to different input voltages. At the same time, in order to output different voltages, multiple windings can also be used. Three independent windings are connected in different ways (such as star and triangle) to input three-phase AC power, and the output is also the same. This is a three-phase transformer. The three-phase oil-immersed transformer uses a fully oil-filled sealed corrugated oil tank shell. It uses its own elasticity to adapt to the expansion of the oil. It is a permanently sealed oil tank. Oil-immersed transformers have been widely used in various power distribution equipment.

[0003] However, traditional oil-immersed three-phase transformers also use heat sinks to dissipate heat, but the heat sinks are usually installed inside and dissipate heat through ventilation holes. However, this heat dissipation efficiency is not high, and it is difficult to effectively clean the heat sink installed inside the equipment. Long-term heat dissipation can easily affect the heat dissipation effect of the equipment. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an oil-immersed three-phase transformer that can be flame-retardant in a timely manner.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: an oil-immersed three-phase transformer capable of timely flame retardancy, comprising a three-phase transformer body, a heat dissipation channel being provided on the side wall of the three-phase transformer body, a strip groove being provided at the center of the lower end portion of the three-phase transformer body, a heat dissipation plate being slidably mounted inside the heat dissipation channel, a heat dissipation groove being provided on the side wall of the heat dissipation plate, a central groove being provided inside the heat dissipation plate, the central groove being connected to the heat dissipation groove, a card slot being provided in the inner wall of the central groove, a first inner groove being provided through the side wall of the heat dissipation plate, a circular groove being provided at the lower end portion of the heat dissipation plate, the circular groove being connected to the first inner groove;

[0006] A sealing mechanism is symmetrically and slidably installed inside the central groove;

[0007] The sealing mechanism includes a dustproof plate, two of which are slidably arranged in the central groove, and fixed strips are fixedly installed on the side walls of the two dustproof plates;

[0008] A plug-in mechanism is provided below the three-phase transformer body;

[0009] The plug-in mechanism includes a base, which is located below the three-phase transformer body. A support base is symmetrically fixedly installed on the lower end of the base, and a slot is symmetrically opened on the upper end of the base.

[0010] Preferably, a rotating bar is rotatably installed on the side wall opposite to each other of the two fixed bars, and the two rotating bars are adapted to the slots. Vertical bars are symmetrically fixedly installed on the lower end of the three-phase transformer body, and limiting slots are provided on the side walls of the two vertical bars.

[0011] Preferably, a second inner groove is symmetrically provided on the side wall of the base, a stabilizing bar is fixedly installed in the inner wall of each of the two second inner grooves, a first sliding groove is provided inside each of the two stabilizing bars, and a sliding bar is slidably installed inside each of the two first sliding grooves.

[0012] Preferably, side bars are fixedly mounted on opposite ends of the two sliding bars, dampers are fixedly mounted on side walls of the two side bars, and ends of the two dampers away from the side bars are fixedly connected to the stabilizing bar.

[0013] Preferably, a cross bar is fixedly installed in the inner wall of the base, a dovetail groove is opened on the side wall of the cross bar, a bottom bar is fixedly installed on the lower end of the cross bar, an L-shaped bar is fixedly installed on the side wall of the bottom bar, and a first guide plate is fixedly installed on the side wall of the L-shaped bar.

[0014] Preferably, a first guide groove is provided on the side wall of the first guide plate, a tooth groove is provided on the side wall of the L-shaped strip, a second guide plate is fixedly mounted on the inner side wall of the base away from the first guide plate, and a second guide groove is provided on the side wall of the second guide plate.

[0015] Preferably, a dovetail block is slidably installed inside the dovetail groove, a fixed block is fixedly installed on the side wall of the dovetail block, a rotating column is rotatably installed inside the fixed block, and the rotating column is slidably arranged in the strip groove and the circular groove.

[0016] Preferably, a threaded cap is threadedly mounted on the upper end of the rotating column, and the threaded cap is movably arranged in the first inner groove. A gear is fixedly mounted on the end of the rotating column away from the threaded cap, and a second sliding groove is opened on the side wall of the fixed block.

[0017] Preferably, a sliding rod is slidably installed inside the fixed block, a sliding column is fixedly installed on the side wall of the sliding rod, and the sliding column is slidably arranged in the second sliding groove.

[0018] Preferably, a U-shaped block is not fixedly installed on the lower portion of the slide bar, the gear is arranged in the U-shaped block, and a pull block is fixedly installed on the lower end portion of the U-shaped block.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the sliding post moves to the right end and slides into the second guide groove, it will be squeezed again and reset. At this time, the heat sink will also complete the shielding of the heat dissipation channel, so that the heat sink can be automatically flipped over without disassembling the device during use, which is convenient for cleaning the interior of the device, thereby enhancing the dust removal effect of the device.

[0021] Secondly, when the rotating column and the threaded cap move, the rotating column will drive the heat sink to rotate inside the three-phase transformer body. When the heat sink rotates to be level with the three-phase transformer body, the heat dissipation effect on the equipment is minimized, thereby achieving the maximum heat dissipation effect, making it easier to control the heat dissipation effect of the three-phase transformer body.

[0022] Third, when the heat sink is moved into the three-phase transformer body during use, the threaded cap can be rotated to disengage from the rotating column. The heat sink can then be moved upward to be removed. Conversely, when installation is required, the threaded cap can be rotated in the first inner groove. When the threaded cap contacts the inner wall of the first inner groove, the heat sink is fixed. This makes the installation and removal of the heat sink more convenient during use.

[0023] Fourthly, when the three-phase transformer body is operating, heat will be generated. At this time, the heat will be discharged to the outside through the heat dissipation channel, and the heat inside the heat dissipation channel will be discharged through the heat dissipation groove. At this time, the two fixing bars can be pulled. The movement of the fixing bars will drive the two dust-proof plates fixed thereto to slide inside the central groove. At this time, the movement of the two dust-proof plates will effectively block the heat dissipation groove, thereby effectively adjusting the heat dissipation, enhancing the heat dissipation functionality of the equipment, and effectively ensuring the operating performance of the three-phase transformer body.

[0024] Fifth, when the heat dissipation is completed, the two fixing bars are moved from the middle to the ends on both sides. At this time, the two dustproof plates will fully seal the heat dissipation slot. At this time, the rotating bar can be flipped over and slid into the slot under the flipping of the rotating bar, thereby completing the snap connection and then completing the seal, so that the device has a dust-proof effect when in use;

[0025] Sixth, during installation, the two side bars can be pulled in opposite directions first. The movement of the two side bars will drive the two slide bars fixed thereto to slide inside the first slide groove and the limit groove. At this time, the side bars will drive the damper to stretch. When the slide bar slips out of the limit groove, the three-phase transformer body can be disassembled, making the installation and disassembly of the three-phase transformer body and the base more convenient and labor-saving when the equipment is in use, and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the heat dissipation plate connection explosion structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the sliding bar connection explosion structure of the present invention;

[0030] Figure 5 Schematic diagram of the crossbar connection structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the fixing block connection structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the rotary column connection explosion structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the explosion structure of the dustproof plate connection of the present invention.

[0034] Among them: 11, three-phase transformer body; 12, heat dissipation channel; 13, strip groove; 14, heat dissipation plate; 15, heat dissipation groove; 16, center groove; 17, card slot; 18, first inner groove; 19, circular groove; 21, dust plate; 22, fixed bar; 23, rotating bar; 24, vertical bar; 25, limit groove; 31, base; 32, support base; 33, slot; 34, second inner groove; 35, stabilizing bar; 36, first slide; 37, Sliding bar; 38. Side bar; 39. Damper; 41. Cross bar; 42. Dovetail groove; 43. Bottom bar; 44. L-shaped bar; 45. First guide plate; 46. First guide groove; 47. Tooth groove; 48. Second guide plate; 49. Second guide groove; 51. Dovetail block; 52. Fixed block; 53. Rotating column; 54. Threaded cap; 55. Gear; 56. Second slide groove; 61. Sliding bar; 62. Sliding column; 63. U-shaped block; 64. Pull block. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the embodiments, other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0036] Example:

[0037] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, an oil-immersed three-phase transformer capable of timely flame retardancy includes a three-phase transformer body 11, a heat dissipation channel 12 is defined on the side wall of the three-phase transformer body 11, a strip groove 13 is defined at the center of the lower end of the three-phase transformer body 11, a heat dissipation plate 14 is slidably mounted inside the heat dissipation channel 12, a heat dissipation groove 15 is defined on the side wall of the heat dissipation plate 14, a central groove 16 is defined inside the heat dissipation plate 14, the central groove 16 is connected to the heat dissipation groove 15, a card groove 17 is defined in the inner wall of the central groove 16, a first inner groove 18 is defined through the side wall of the heat dissipation plate 14, a circular groove 19 is defined at the lower end of the heat dissipation plate 14, the circular groove 19 is connected to the first inner groove 18;

[0038] A sealing mechanism is symmetrically and slidably installed inside the central groove 16;

[0039] The sealing mechanism includes a dustproof plate 21, and the two dustproof plates 21 are both slidably arranged in the central groove 16. The side walls of the two dustproof plates 21 are fixedly installed with fixed strips 22, and the side walls of the two fixed strips 22 are rotatably installed with rotating strips 23. The two rotating strips 23 are adapted to the card slot 17. When the heat dissipation is completed, the two fixed strips 22 are moved from the middle to the ends on both sides. At this time, the two dustproof plates 21 will fully close the heat dissipation groove 15. At this time, the rotating strips 23 can be flipped. When the rotating strips 23 are flipped, they will slide into the inside of the card slot 17, thereby completing the card connection and then completing the sealing, so that the device has a dustproof effect when in use. The lower end of the three-phase transformer body 11 The vertical bars 24 are symmetrically fixedly installed on the upper part, and the side walls of the two vertical bars 24 are provided with limit slots 25. When the three-phase transformer body 11 is in operation, heat will be generated. At this time, the heat will be discharged to the outside through the heat dissipation channel 12, and the heat inside the heat dissipation channel 12 will be discharged through the heat dissipation slot 15. At this time, the two fixing bars 22 can be pulled. Under the movement of the fixing bars 22, the two dust-proof plates 21 fixed thereto will be driven to slide inside the central groove 16. At this time, the movement of the two dust-proof plates 21 will complete the effective shielding of the heat dissipation slot 15, so that it can effectively adjust the heat dissipation, enhance the heat dissipation functionality of the equipment, and effectively ensure the operating performance of the three-phase transformer body 11;

[0040] A plug-in mechanism is provided below the three-phase transformer body 11;

[0041] The plug-in mechanism includes a base 31, which is located below the three-phase transformer body 11. A support base 32 is symmetrically fixedly installed on the lower end of the base 31, and a slot 33 is symmetrically opened on the upper end of the base 31. A second inner groove 34 is symmetrically opened on the side wall of the base 31. A stabilizing bar 35 is fixedly installed in the inner wall of the two second inner grooves 34. A first slide 36 is opened inside the two stabilizing bars 35. A slide 37 is slidably installed inside the two first slides 36. A side bar 38 is fixedly installed on the opposite end of the two slides 37, and a damper 39 is fixedly installed on the side wall of the two side bars 38. The ends of the two dampers 39 away from the side bars 38 are fixedly connected to the stabilizing bar 35. When installing, the two side bars 38 can be pulled in opposite directions. The movement of the two side bars 38 will drive the two sliding bars 37 fixed thereto to slide inside the first sliding groove 36 and the limiting groove 25. At this time, the side bars 38 will drive the dampers 39 to stretch. When the sliding bars 37 slip out of the limiting groove 25, the three-phase transformer body 11 can be disassembled. This makes the installation and disassembly of the three-phase transformer body 11 and the base 31 more convenient and labor-saving when the equipment is in use, and is easy to repair.

[0042] A cross bar 41 is fixedly installed in the inner wall of the base 31, a dovetail groove 42 is provided on the side wall of the cross bar 41, a bottom bar 43 is fixedly installed on the lower end of the cross bar 41, an L-shaped bar 44 is fixedly installed on the side wall of the bottom bar 43, a first guide plate 45 is fixedly installed on the side wall of the L-shaped bar 44, a first guide groove 46 is provided on the side wall of the first guide plate 45, a tooth groove 47 is provided on the side wall of the L-shaped bar 44, a second guide plate 48 is fixedly installed on the inner side wall of the base 31 away from the first guide plate 45, and a second guide groove 49 is provided on the side wall of the second guide plate 48.

[0043] A dovetail block 51 is slidably installed inside the dovetail groove 42, and a fixed block 52 is fixedly installed on the side wall of the dovetail block 51. A rotating column 53 is rotatably installed inside the fixed block 52. The rotating column 53 is slidably arranged in the strip groove 13 and the circular groove 19. A threaded cap 54 is threadedly installed on the upper end of the rotating column 53. When in use, when the heat sink 14 is moved into the three-phase transformer body 11, the threaded cap 54 can be rotated at this time. Under the rotation of the threaded cap 54, it will be separated from the rotating column 53. At this time, the heat sink 14 can be moved upward to remove it. Conversely, when it needs to be installed, the threaded cap 54 can be rotated in the first inner groove 18. When the threaded cap 54 contacts the inner wall of the first inner groove 18, the fixation is completed. This makes it easier to install and disassemble the heat sink 14 when the device is in use. The threaded cap 54 is movably arranged in the first inner groove 18. A gear 55 is fixedly installed on the end of the rotating column 53 away from the threaded cap 54. A second slide groove 56 is provided on the side wall of the fixed block 52. A slide rod 61 is slidably installed inside the fixed block 52. A slide column 62 is fixedly installed on the side wall of the slide rod 61. The slide column 62 is slidably arranged in the second slide groove 56. A U-shaped block 63 is not fixedly installed under the slide rod 61. The gear 55 is arranged in the U-shaped block 63. A pull block 64 is fixedly installed at the lower end of the U-shaped block 63. When in use, pull the pull block 64 to the left first, and the movement of the pull block 64 will drive the U-shaped block 63 and the slide column 6 2 moves accordingly, and the movement of the U-shaped block 63 and the sliding post 62 drives the fixed block 52 to move. At this time, the fixed block 52 drives the dovetail block 51 to slide inside the dovetail groove 42, and the fixed block 52 drives the rotating post 53, the threaded cap 54 and the gear 55 inside it to slide accordingly. At this time, the rotating post 53 drives the heat dissipation plate 14 to slide inside the heat dissipation channel 12. At this time, the gear 55 is located below the tooth groove 47, so the two cannot contact each other. When the sliding post 62 slides into the first guide groove 46, the sliding post 62 will be subjected to the extrusion force, and at this time, it will drive the rotating post 53, the threaded cap 54 and the gear 55 connected to it to rotate upward. When the sliding post 62 moves to the right and slides into the second guide groove 49, it will be squeezed again and reset. At this time, the heat sink 14 will also complete the shielding of the heat dissipation channel 12, so that the heat sink 14 can be automatically flipped over without disassembling the device during use, thereby facilitating cleaning of the interior thereof, thereby enhancing the dust removal effect of the device.

[0044] Working principle:

[0045] The first step is to pull the pull block 64 to the left when in use. The movement of the pull block 64 will drive the U-shaped block 63 and the sliding post 62 to move accordingly. The movement of the U-shaped block 63 and the sliding post 62 will drive the fixed block 52 to move. At this time, the fixed block 52 drives the dovetail block 51 to slide inside the dovetail groove 42, and the fixed block 52 drives the rotating post 53, the threaded cap 54 and the gear 55 inside it to slide accordingly. At this time, the rotating post 53 drives the heat dissipation plate 14 to slide inside the heat dissipation channel 12. At this time, the gear 55 is located below the tooth groove 47, so the two cannot contact each other. When the sliding post 62 slides into the first guide groove 46, the sliding post 62 will be subjected to the extrusion force, and it will drive the rotating post connected to it to rotate. The column 53, the threaded cap 54 and the gear 55 are adjusted upwards. At this time, the pull block 64 is pulled to the right. When the gear 55 contacts the tooth groove 47, the gear 55 will rotate one circle. The rotation of the gear 55 will drive the rotating column 53 and the threaded cap 54 fixed thereto to rotate accordingly. At this time, the rotating column 53 and the threaded cap 54 will drive the heat sink 14 to rotate one circle. When the sliding column 62 moves to the right end and slides into the second guide groove 49, it will be squeezed again and reset. At this time, the heat sink 14 will also complete the shielding of the heat dissipation channel 12, so that the heat sink 14 can be automatically turned over without disassembling the device when in use, thereby facilitating cleaning of the interior thereof, thereby enhancing the dust removal effect of the device.

[0046] In the second step, when the heat sink 14 is moved into the three-phase transformer body 11 during use, the threaded cap 54 can be rotated. The threaded cap 54 will be disengaged from the rotating column 53 during the rotation. The heat sink 14 can then be moved upward to be removed. Conversely, when it is necessary to install it, the threaded cap 54 can be rotated in the first inner groove 18. When the threaded cap 54 contacts the inner wall of the first inner groove 18, the fixation is completed, making the installation and removal of the heat sink 14 more convenient when the device is in use.

[0047] In the third step, when the three-phase transformer body 11 is in operation, heat is generated. At this time, the heat is discharged to the outside through the heat dissipation channel 12, and the heat inside the heat dissipation channel 12 is discharged through the heat dissipation groove 15. At this time, the two fixing bars 22 can be pulled. The movement of the fixing bars 22 will respectively drive the two dust-proof plates 21 fixed thereto to slide inside the central groove 16. At this time, the movement of the two dust-proof plates 21 will effectively block the heat dissipation groove 15, thereby effectively adjusting the heat dissipation amount, enhancing the heat dissipation functionality of the equipment, and effectively ensuring the operating performance of the three-phase transformer body 11;

[0048] In the fourth step, when the heat dissipation is completed, the two fixing bars 22 are moved from the middle to the ends on both sides. At this time, the two dustproof plates 21 will fully seal the heat dissipation slot 15. At this time, the rotating bar 23 can be flipped and slid into the inside of the card slot 17 under the flipping of the rotating bar 23, thereby completing the card connection and further completing the sealing, so that the device has a dust-proof effect when in use;

[0049] In the fifth step, during installation, the two side bars 38 can be pulled in opposite directions. The movement of the two side bars 38 will drive the two slide bars 37 fixed thereto to slide inside the first slide groove 36 and the limit groove 25. At this time, the side bars 38 will drive the damper 39 to stretch. When the slide bar 37 slips out of the limit groove 25, the three-phase transformer body 11 can be disassembled, making the installation and disassembly of the three-phase transformer body 11 and the base 31 more convenient and labor-saving when the equipment is in use, and easy to maintain.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An oil-immersed three-phase transformer capable of timely flame retardancy, comprising a three-phase transformer body (11), a heat dissipation channel (12) being provided on a side wall of the three-phase transformer body (11), and a strip groove (13) being provided at the center of the lower end of the three-phase transformer body (11), characterized in that: A heat dissipation plate (14) is slidably mounted inside the heat dissipation channel (12), a heat dissipation groove (15) is provided on the side wall of the heat dissipation plate (14), a central groove (16) is provided inside the heat dissipation plate (14), the central groove (16) is connected to the heat dissipation groove (15), a card groove (17) is provided in the inner wall of the central groove (16), a first inner groove (18) is provided through the side wall of the heat dissipation plate (14), a circular groove (19) is provided at the lower end of the heat dissipation plate (14), and the circular groove (19) is connected to the first inner groove (18); A sealing mechanism is symmetrically and slidably mounted inside the central groove (16); The sealing mechanism comprises a dustproof plate (21), wherein the two dustproof plates (21) are both slidably arranged in the central groove (16), and the side walls of the two dustproof plates (21) are both fixedly mounted with fixing strips (22); A plug-in mechanism is provided below the three-phase transformer body (11); The plug-in mechanism comprises a base (31), the base (31) being located below the three-phase transformer body (11), a support base (32) being symmetrically fixedly mounted on the lower end of the base (31), and a slot (33) being symmetrically opened on the upper end of the base (31). A rotating bar (23) is rotatably mounted on the side wall of the two fixed bars (22) facing away from each other. The two rotating bars (23) are both adapted to the slot (17). A vertical bar (24) is symmetrically fixedly mounted on the lower end of the three-phase transformer body (11). A limiting slot (25) is provided on the side wall of the two vertical bars (24). The side wall of the base (31) is symmetrically provided with a second inner groove (34), the inner walls of the two second inner grooves (34) are fixedly provided with a stabilizing bar (35), the interiors of the two stabilizing bars (35) are provided with a first sliding groove (36), and the interiors of the two first sliding grooves (36) are slidably provided with a sliding bar (37).

2. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 1, characterized in that: A side bar (38) is fixedly mounted on the ends of the two sliding bars (37) that are away from each other, a damper (39) is fixedly mounted on the side walls of the two side bars (38), and the ends of the two dampers (39) that are away from the side bars (38) are fixedly connected to the stabilizing bar (35).

3. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 1, characterized in that: A cross bar (41) is fixedly mounted on the inner wall of the base (31), a dovetail groove (42) is provided on the side wall of the cross bar (41), a bottom bar (43) is fixedly mounted on the lower end of the cross bar (41), an L-shaped bar (44) is fixedly mounted on the side wall of the bottom bar (43), and a first guide plate (45) is fixedly mounted on the side wall of the L-shaped bar (44).

4. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 3, characterized in that: A first guide groove (46) is provided on the side wall of the first guide plate (45), a tooth groove (47) is provided on the side wall of the L-shaped strip (44), a second guide plate (48) is fixedly mounted on the inner side wall of the base (31) away from the first guide plate (45), and a second guide groove (49) is provided on the side wall of the second guide plate (48).

5. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 3, characterized in that: A dovetail block (51) is slidably mounted inside the dovetail groove (42), a fixed block (52) is fixedly mounted on the side wall of the dovetail block (51), a rotating column (53) is rotatably mounted inside the fixed block (52), and the rotating column (53) is slidably mounted inside the strip groove (13) and the circular groove (19).

6. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 5, characterized in that: A threaded cap (54) is threadedly mounted on the upper end of the rotating column (53), and the threaded cap (54) is movably disposed in the first inner groove (18). A gear (55) is fixedly mounted on the end of the rotating column (53) away from the threaded cap (54), and a second sliding groove (56) is provided on the side wall of the fixed block (52).

7. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 6, characterized in that: A sliding rod (61) is slidably mounted inside the fixed block (52), a sliding column (62) is fixedly mounted on the side wall of the sliding rod (61), and the sliding column (62) is slidably mounted inside the second sliding groove (56).

8. The oil-immersed three-phase transformer capable of timely flame retardancy according to claim 7, characterized in that: A U-shaped block (63) is loosely mounted on the lower portion of the slide bar (61), the gear (55) is disposed within the U-shaped block (63), and a pull block (64) is fixedly mounted on the lower end portion of the U-shaped block (63).

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