A three-dimensional wound core transformer

Abstract

The invention relates to the technical field of transformers, and discloses a three-dimensional wound core transformer, comprising a three-dimensional wound core and an oil tank, wherein the oil tank is filled with transformer oil; a first clamping assembly is arranged in the oil tank, and the three-dimensional wound core is arranged on the first clamping assembly; a tank cover is arranged on the oil tank; the low-voltage bushing, the high-voltage bushing, the tap changer, and the oil pillow are installed on the tank cover; a second clamping assembly is arranged in the oil tank, and a coil winding is arranged on the second clamping assembly, wherein the coil winding comprises a low-voltage coil and a high-voltage coil, and the low-voltage bushing and the high-voltage bushing are respectively connected to the low-voltage coil and the high-voltage coil; a through hole is opened on the bottom surface of the oil tank, and a de-impurity mechanism is arranged on the through hole. By arranging the de-impurity mechanism, the present application can separate and remove impurities generated in the transformer oil in time, avoid these impurities from clogging the heat dissipation pipe, ensure the smooth flow of the transformer oil, ensure the heat dissipation effect of the transformer, and ensure the normal operation of the transformer.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to a three-dimensional wound iron core transformer. Background Art

[0002] The three-dimensional wound core transformer is an energy-saving power transformer. It creatively reforms the laminated magnetic circuit structure and three-phase layout of traditional power transformers, making the product performance more optimized. The three-dimensional wound core transformer is an energy-saving power transformer. It creatively reforms the laminated magnetic circuit structure and three-phase layout of traditional power transformers, making the product performance more optimized, such as completely symmetrical three-phase magnetic circuit, significant power saving effect, greatly reduced noise, stronger heat dissipation and overload capacity, compact structure and small size, etc.

[0003] The Chinese patent with application publication number CN115863026A and main classification number H01F27 / 32 discloses a triangular three-dimensional wound core transformer, including: a three-phase three-column iron core with a three-dimensional symmetrical structure; and a winding connected to the outside of the iron core; and a body connected to the end of the iron core and a lead connected to the winding, and an oil tank connected to the body; and also includes an insulation structure, the insulation structure including inner insulation and outer insulation. The present invention is mainly composed of a three-phase three-column iron core with a three-dimensional symmetrical structure, a winding, an oil tank, an insulation structure and other components, the insulation structure is composed of inner insulation and outer insulation, the outer insulation is arranged between the lead and the body, and the inner insulation is used to insulate the winding and the branch line switch inside the lead.

[0004] A Chinese patent with application publication number CN104752030A and main classification number H01F27 / 28 discloses an oil-immersed three-dimensional triangular wound core high overload transformer, comprising a three-dimensional wound core composed of three identical rectangular single frames, an oil tank, a coil winding, and a clamp. The oil tank is filled with transformer oil. The coil winding comprises a low-voltage coil and a high-voltage coil. The low-voltage coil and the high-voltage coil are respectively wound on the core column of the three-dimensional wound core in sequence. The clamp is arranged in a triangular shape at the upper and lower parts of the coil winding. Heat dissipation oil channels are provided between the layers of the low-voltage coil and the high-voltage coil. Diamond-shaped dotted paper insulation layers are provided at the upper and lower ends of the low-voltage coil and the high-voltage coil and between the coil layers.

[0005] During the use of transformer oil, due to oxidation and corrosion, impurities are easily mixed into the transformer oil. In the above prior art, the impurities generated in the transformer oil cannot be separated and removed in time. These impurities flow into the heat dissipation pipe along with the flow of the transformer oil and easily block the heat dissipation pipe, causing the transformer oil inside the transformer to flow poorly, affecting the heat dissipation effect of the transformer, affecting the normal operation of the transformer, and even causing damage to the transformer. Summary of the invention

[0006] The object of the present invention is to provide a three-dimensional wound core transformer to solve the problem of how to separate impurities inside transformer oil in the above background technology to ensure the normal operation of the transformer equipment.

[0007] The technical scheme adopted by the present invention is as follows: a three-dimensional wound core transformer, comprising a three-dimensional wound core formed by splicing three identical rectangular single frames, an oil tank, a coil winding, a first clamping assembly, a second clamping assembly, a low-voltage bushing, a high-voltage bushing, a tap changer, and an oil pillow, wherein the oil tank is filled with transformer oil; a first clamping assembly is arranged in the oil tank, and a three-dimensional wound core is arranged on the first clamping assembly; a box cover is arranged on the oil tank; the low-voltage bushing, the high-voltage bushing, the tap changer, and the oil pillow are installed on the box cover; a second clamping assembly is arranged in the oil tank, and a coil winding is arranged on the second clamping assembly, wherein the coil winding comprises a low-voltage coil and a high-voltage coil, wherein the low-voltage coil and the high-voltage coil are respectively wound on the core column of the three-dimensional wound core in sequence, and the low-voltage bushing and the high-voltage bushing are respectively connected to the low-voltage coil and the high-voltage coil; a through hole is opened on the bottom surface of the oil tank, wherein the number of the through holes is 3, and the 3 through holes are arranged at equal angles, and a de-impurity mechanism is arranged on the through hole, and the de-impurity mechanism is used to collect and discharge impurities deposited in the transformer oil.

[0008] The box cover is in a hexagonal shape, wherein three sides are long sides and three sides are short sides, which are arranged at intervals of one long and one short to form a flying saucer-like structure; a lifting lug is provided on the top surface of the box cover, and the number of the lifting lugs is at least 2; a sealing gasket is provided between the box cover and the upper flange.

[0009] The long side section of the lower flange is provided with a square tube, and the bottom surface of the square tube is provided with a U-shaped seat.

[0010] An oil shell is provided on the bottom surface of the oil tank, a bottom plate is provided inside the oil shell, a top plate is provided on the bottom surface of the oil tank, an annular air bag is provided between the top plate and the bottom plate, a fourth spring is provided between the top plate and the bottom plate, the fourth spring makes the top plate and the oil tank abut against each other, an air injection pipe is provided on the bottom plate, the lower end of the air injection pipe extends outside the oil shell, and an oil inlet channel connected to the oil shell is opened on the oil tank.

[0011] The beneficial effect of the present invention is that: by setting up an impurity removal mechanism, the present application can separate and remove impurities generated in the transformer oil in a timely manner, avoid these impurities from clogging the heat dissipation pipe, ensure the smooth flow of the transformer oil, ensure the heat dissipation effect of the transformer, and ensure the normal operation of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of this application.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the three-dimensional wound iron core.

[0014] Figure 3This is a schematic diagram of the main cross-sectional structure of the high-voltage coil and the low-voltage coil.

[0015] Figure 4 It is a three-dimensional structural schematic diagram of the impurity removal mechanism.

[0016] Figure 5 It is a schematic diagram of the top view of the box bottom.

[0017] Figure 6 It is a schematic diagram of the side structure of the box bottom.

[0018] Figure 7 It is a schematic diagram of the three-dimensional structure of the box.

[0019] Figure 8 It is a schematic diagram of the three-dimensional structure of the box cover.

[0020] Fig. 9 It is a schematic diagram of the side view structure of a square tube.

[0021] Fig.10 It is a schematic diagram of the side structure of the first clamping assembly.

[0022] Fig.11 It is a schematic diagram of the top structure of the first clamping assembly.

[0023] Fig.12 It is a schematic diagram of the front view structure of the first clamping assembly.

[0024] Fig.13 It is a schematic diagram of the three-dimensional structure of the clamping arm.

[0025] Fig.14 It is a schematic diagram of the side cross-sectional structure of the clamping arm.

[0026] Fig.15 It is a schematic diagram of the three-dimensional structure of the second clamping assembly.

[0027] Fig.16 It is a schematic diagram of the three-dimensional structure of the second L-shaped seat.

[0028] Fig.17 It is a schematic diagram of the three-dimensional structure of the tank.

[0029] Fig.18 It is a schematic diagram of the three-dimensional structure of the inlet pipe.

[0030] Fig.19 It is a schematic diagram of the main cross-sectional structure of the tank body.

[0031] Fig. 20 It is a schematic diagram of the three-dimensional structure of the scroll disk.

[0032] Fig.21 It is a schematic diagram of the main cross-sectional structure of the material plate.

[0033] Fig. 22 It is a three-dimensional structural schematic diagram of the scraping mechanism.

[0034] Fig.23 It is a schematic diagram of the three-dimensional structure of the screw.

[0035] Fig.24 It is a schematic diagram of the side cross-sectional structure of the sleeve.

[0036] Fig.25 Schematic diagram of the top view of the inclined plate.

[0037] Fig.26 It is a schematic diagram of the side structure of the filter box.

[0038] Fig. 27 It is a schematic diagram of the side cross-sectional structure of the filter box.

[0039] Fig.28 Schematic diagram of the three-dimensional structure of the filter plate.

[0040] Fig.29 It is a schematic diagram of the main cross-sectional structure of the filter plate.

[0041] Fig.30 This is a schematic diagram of the main structure of the gas collecting box.

[0042] Fig.31 It is a schematic diagram of the main cross-sectional structure of the air supply pipe.

[0043] Fig.32 It is a schematic diagram of the cross-sectional structure of the air supply pipe from top view.

[0044] Fig.33 It is a schematic diagram of the side cross-sectional structure of the oil shell.

[0045] In the figure: 1, three-dimensional wound core; 2, oil tank; 3, coil winding; 4, first clamping assembly; 5, second clamping assembly; 6, low-voltage bushing; 7, high-voltage bushing; 8, tap changer; 9, oil pillow; 10, box cover; 11, low-voltage coil; 12, high-voltage coil; 13, through hole; 14, impurity removal mechanism; 15, box bottom; 16, box body; 17, collecting trough; 18, arched surface; 19, through groove; 20, heat sink; 21, heat sink; 22, reinforcement plate; 23, lower flange; 24, upper flange; 25, lifting ear; 26, sealing gasket; 27, square tube; 28, U-shaped seat; 29, insulation platform; 30, insulation bolt; 31, vertical rod; 3 2. Limit block; 33. Positioning piece; 34. Support seat; 35. Forked arm; 36. Baffle; 37. Slide; 38. Pressing arm; 39. First hinge seat; 40. First screw; 41. Double-headed screw tube; 42. Screw part; 43. Second screw; 44. Second hinge seat; 45. Rotating tube; 46. Drive nut; 47. Foot seat; 48. First frame; 49. First carrier plate; 50. First insulating seat; 51. Second carrier plate; 52. First L-shaped seat; 53. Double-headed screw; 54. Second frame; 55. Third carrier plate; 56. Second insulating seat; 57. Fourth carrier plate; 58. Second L-shaped seat; 59. Tank body; 60. Drum section ;61, cone section;62, round section;63, nut;64, inlet pipe;65, guide plate;66, rotating shaft;67, extension shaft;68, first motor;69, vortex plate;70, vortex blade;71, liquid outlet pipe;72, material plate;73, material port;74, branch pipe;75, flange;76, valve cover;77, ring groove;78, rubber diaphragm;79, air inlet hole;80, straight rod;81, limit plate;82, T-type seat;83, positioning nut;84, first spring;85, scraping mechanism;86, lead screw;87, second motor;88, slide seat;89, guide rod;90, extension rod;91, sleeve;92, second Spring; 93, scraper; 94, shaft seat; 95, inclined plate; 96, third spring; 97, side pipe; 98, first elbow; 99, filter box; 100, filter screen; 101, second elbow; 102, oil storage tank; 103, oil pump; 104, third elbow; 105, support rod; 106, rectangular groove; 107, filter plate; 108, oil trough; 109, filter hole; 110, air supply pipe; 111, air collecting box; 112, air supply pipe; 113, air blower; 114, oil shell; 115, bottom plate; 116, top plate; 117, annular air bag; 118, fourth spring; 119, air injection pipe; 120, oil inlet channel. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] like Figure 1~Figure 4As shown, a three-dimensional wound core transformer includes a three-dimensional wound core 1 formed by three identical rectangular single frames, an oil tank 2, a coil winding 3, a first clamping assembly 4, a second clamping assembly 5, a low-voltage bushing 6, a high-voltage bushing 7, a tap switch 8, and an oil pillow 9. The oil tank 2 is filled with transformer oil; the first clamping assembly 4 is installed in the oil tank 2, and the three-dimensional wound core 1 is installed on the first clamping assembly 4; a box cover 10 is provided on the oil tank 2; the low-voltage bushing 6, the high-voltage bushing 7, the tap switch 8, and the oil pillow 9 are installed on the box cover 10; the second clamping assembly 5 is installed in the oil tank 2, and the coil winding 3 is installed on the second clamping assembly 5, and the coil winding 3 includes a low-voltage coil 11 and a high-voltage coil 12, the low-voltage coil 11 and the high-voltage coil 12 are respectively wound on the core columns of the three-dimensional wound core 1 in sequence, and the low-voltage bushing 6 and the high-voltage bushing 7 are respectively connected to the low-voltage coil 11 and the high-voltage coil 12; a through hole 13 is opened on the bottom surface of the oil tank 2, preferably, the number of the through holes 13 is 3, and the 3 through holes 13 are arranged at equal angles, and a de-impurity mechanism 14 is installed on the through hole 13, and the de-impurity mechanism 14 is used to collect and discharge impurities deposited in the transformer oil; by setting the de-impurity mechanism 14, the present application can separate and remove impurities generated in the transformer oil in time, avoid these impurities from clogging the heat dissipation pipe, ensure the smooth flow of the transformer oil, ensure the heat dissipation effect of the transformer, and ensure the normal operation of the transformer.

[0051] like Figure 5 and Figure 6 As shown, as an optimization of the embodiment, the oil tank 2 is composed of a box bottom 15 and a box body 16 welded together, the box bottom 15 is in the shape of a hexagon, wherein three sides are long sides and three sides are short sides, arranged at intervals of one long and one short to form a flying saucer-like structure; a collecting groove 17 is provided on the edge of the top surface of the box bottom 15, and the shape of the collecting groove 17 is an annular hexagon; the collecting groove 17 is the lowest point of the box bottom 15, and the short side of the collecting groove 17 is used to open the through hole 13; the top surface of the box bottom 15 has a sloped arched surface 18, and the arched surface 18 facilitates impurities to slide into the collecting groove 17. By limiting the structure of the oil tank 2, freely settled impurities can be concentrated in the collecting groove 17, which is convenient for the impurity removal mechanism 14 to handle.

[0052] like Figure 7 and Figure 8As shown, as an optimization of the embodiment, the box body 16 is in the shape of a hexagonal tube, wherein three sides are long sides and three sides are short sides, which are arranged at intervals of one long and one short; a plurality of through grooves 19 are provided on the long side section of the box body 16, and the through grooves 19 are arranged at equal intervals, and a heat sink 20 is welded on the through groove 19, and the heat sink 20 has a heat sink 21 connected to the oil tank 2; a reinforcing plate 22 is welded on the heat sink 20, and the reinforcing plate 22 connects a plurality of heat sinks 20 in series to improve the structural strength of the heat sink 20; a lower flange 23 is welded on the bottom edge of the box body 16, and an upper flange 24 is welded on the top edge of the box body 16, and the upper flange 24 is connected to the box cover 10 by bolts; by providing the heat sink 20, the heat dissipation effect of the transformer oil can be improved.

[0053] like Figure 8 As shown, as an optimization of the embodiment, the box cover 10 is in a hexagonal shape, wherein three sides are long sides and three sides are short sides, which are arranged at intervals of one long and one short to form a flying saucer-like structure; a lifting lug 25 is welded on the top surface of the box cover 10, and the number of the lifting lugs 25 is at least 2; a sealing gasket 26 is installed between the box cover 10 and the upper flange 24.

[0054] like Fig. 9 As shown, as an optimization of the embodiment, the long side section of the lower flange 23 is connected to a square tube 27 by bolts, and the bottom surface of the square tube 27 is connected to a U-shaped seat 28 by bolts. By providing the U-shaped seat 28, the installation of the present application is facilitated, and by providing the square tube 27, the height of the oil tank 2 from the ground can be increased to protect the impurity removal mechanism 14.

[0055] like Figure 10~Figure 14As shown, as an optimization of the embodiment, the first clamping assembly 4 includes an insulating platform 29, the insulating platform 29 is located at the center of the oil tank 2, and the insulating platform 29 is fixed to the oil tank 2 by an insulating bolt 30; a vertical rod 31 is connected to the insulating platform 29, and a limiting block 32 is connected to the vertical rod 31, and the number of the limiting blocks 32 is 2, and the 2 limiting blocks 32 are symmetrically arranged up and down; a positioning member 33 is installed on the vertical rod 31, and the number of the positioning members 33 is 2, and the 2 positioning members 33 are positioned by the limiting blocks 32; the positioning member 33 includes a support seat 34 slidably connected to the vertical rod 31, and the support seat 34 has three bifurcated arms 35, and the bifurcated arms 35 are connected to a baffle 36, and the baffle 36 is used to limit the outward movement of the three-dimensional coiled core 1; a slide groove 37 is provided on the bifurcated arm 35, and a clamping arm 38 is slidably connected in the slide groove 37, and the clamping arm 38 is inclined Arranged obliquely, the clamping arm 38 is adapted to the inclined surface of the three-dimensional wound core 1; the side wall of the clamping arm 38 is connected to a first hinged seat 39, on which a first screw 40 is hinged, on which a double-headed screw tube 41 is threadedly connected, and the side wall of the double-headed screw tube 41 has a screwing portion 42, and the other end of the double-headed screw tube 41 is threadedly connected to a second screw 43, on which a second hinged seat 44 is hinged, and on which a rotating tube 45 is connected a rotating tube 45, on which a driving nut 46 is rotatably connected, and the driving nut 46 is threadedly connected to the vertical rod 31; by rotating the driving nut 46, the three clamping arms 38 are moved synchronously, the clamping arms 38 clamp the three-dimensional wound core 1, and then the double-headed screw tube 41 is rotated to further fine-tune the clamping core to avoid the clamping arm 38 from damaging the three-dimensional wound core 1 and to prevent the clamping arm 38 from loosening.

[0056] like Fig.15 and Fig.16As shown, as an optimization of the embodiment, the second clamping assembly 5 includes a foot 47, which is connected to the arched surface 18 of the oil tank 2. The number of the foot 47 is 6, 2 foot 47 form a group, and 3 groups of foot 47 are arranged at equal angles. The foot 47 is connected to a first frame 48 by bolts, and the first frame 48 is composed of 3 channel steels welded end to end; the first frame 48 is connected to a first carrier plate 49 by bolts, the number of the first carrier plates 49 is 3, and the 3 first carrier plates 49 are located at the angle of the first frame 48, and a first insulating seat 50 is installed on the first carrier plate 49, and a second carrier plate 51 is installed on the long side section of the first frame 48, and a symmetrically arranged first insulating seat 50 is installed on the second carrier plate 51, a total of 9 first insulating seats 50, 3 first insulating seats 50 form a group, and the first insulating seat 50 is installed with a first L-shaped Seat 52, the first L-shaped seat 52 is adapted to the bottom surface of the coil winding 3; the second frame 48 is connected to the second frame 54 by a double-headed screw 53, and the second frame 54 is composed of 3 channel steels welded end to end; the second frame 54 is connected to the third carrier plate 55 by bolts, the number of the third carrier plates 55 is 3, and the 3 third carrier plates 55 are located at the angle of the second frame 54, and the third carrier plate 55 is installed with a second insulating seat 56, and the long side section of the second frame 54 is installed with a fourth carrier plate 57, and the fourth carrier plate 57 is installed with symmetrically arranged second insulating seats 56, a total of 9 second insulating seats 56, 3 second insulating seats 56 are a group, and the second insulating seat 56 is installed with a second L-shaped seat 58, and the second L-shaped seat 58 is adapted to the top surface of the coil winding 3; the present application can fix 3 coil windings 3 by setting a second clamping assembly 5.

[0057] like Figure 17~Figure 20As shown, as an optimization of the embodiment, the impurity removal mechanism 14 includes a tank body 59, which is composed of a barrel section 60, a conical tube section 61, and a round tube section 62 arranged from top to bottom. The barrel section 60 is connected to the through hole 13, and a nut 63 is threadedly connected to the round tube section 62. Opening the nut 63 can discharge the impurities collected in the tank body 59; the barrel section 60 located in the oil tank 2 is connected to an impurity inlet pipe 64, and the shape of the impurity inlet pipe 64 is U-shaped. The opening of the impurity inlet pipe 64 is against the collecting groove 17, and the side of the impurity inlet pipe 64 is against the inner wall of the oil tank 2. The side wall of the impurity inlet pipe 64 can be connected to a guide plate 65, which is arranged obliquely, and the free end of the guide plate 65 faces the arched surface 18 and is against the collecting groove 17; the top surface of the impurity inlet pipe 64 is rotatably connected to the rotating shaft 66, and the upper end of the rotating shaft 66 is connected to an extension shaft 67, which is rotatably connected to the box cover 10, and the extension shaft 6 7 is driven by a first motor 68, and the first motor 68 is connected to the box cover 10; a vortex plate 69 is connected to the rotating shaft 66, and the bottom surface of the vortex plate 69 is an arc surface. The bottom surface of the vortex plate 69 is connected with vortex blades 70 arranged at equal angles. The vortex blades 70 push the transformer oil in the impurity inlet pipe 64 into the tank body 59, and the transformer oil flows spirally in the tank body 59. Due to the deadweight, the impurities settle in the conical tube section 61 and the circular tube section 62; the top surface of the barrel section 60 is connected with a liquid outlet pipe 71, and the liquid outlet pipe 71 is located at the center of the barrel section 60. The lower end of the liquid outlet pipe 71 penetrates into the tank body 59. Preferably, the lower end of the liquid outlet pipe 71 is flush with the bottom surface of the impurity inlet pipe 64, so that the transformer oil can be cyclone separated from the impurities. The present application sets the impurity removal mechanism 14, which can send the impurities in the collecting tank 17 into the tank body 59, and use the principle of cyclone dust removal to separate the impurities and then discharge them.

[0058] like Fig.21As shown, as an optimization of the embodiment, considering that the above-mentioned impurities need to be shut down when discharged, and a large amount of transformer oil will be carried out, the barrel section 60 of the tank body 59 is connected with a material plate 72, and the material plate 72 is composed of a first oblique section, a vertical section, and a second oblique section arranged from top to bottom. The first oblique section and the second oblique section are both inclined upward, and the material plate 72 divides the tank body 59 into two parts, an upper and a lower part, and a material port 73 is provided in the vertical section of the material plate 72; a branch pipe 74 is connected to the barrel section 60, a flange 75 is connected to the branch pipe 74, a valve cover 76 is connected to the flange 75, and the valve cover 76 is a hat-shaped structure. An annular groove 77 is provided on the opposite surfaces of the valve cover 76 and the flange 75, and a rubber diaphragm 78 is fixed in the annular groove 77 by screws. The rubber diaphragm 78 and the valve cover 76 form an air injection chamber, and the valve cover 76 has an air inlet 79; the rubber diaphragm 78 A straight rod 80 is connected in the middle, and a limit plate 81 is connected to the straight rod 80. The limit plate 81 is located in the air injection chamber. A T-shaped seat 82 is slidably connected to the straight rod 80. The large diameter section of the T-shaped seat 82 is adapted to the material port 73. A positioning nut 83 is threadedly connected to the straight rod 80. The positioning nut 83 is used to fix the T-shaped seat 82 on the straight rod 80. The side wall of the straight rod 80 is sleeved with a first spring 84, and the first spring 84 is elastically connected between the limit plate 81 and the valve cover 76. In the normal state, the T-shaped seat 82 is separated from the material port 73 to ensure that impurities can enter the conical tube section 61. When impurities need to be discharged, air is injected into the air inlet 79 to expand the rubber diaphragm 78, and the T-shaped seat 82 moves to the left to close the material port 73. Then, the nut 63 is opened to discharge the impurities, so that a large amount of transformer oil will not be carried out, and impurities can be discharged without stopping the machine.

[0059] like Figure 22~Figure 25As shown, as an optimization of the embodiment, considering that the transformer oil is viscous and the impurity flow effect in the collecting tank 17 is poor, a scraping mechanism 85 is installed on the oil tank 2, and the number of scraping mechanisms 85 is 3. The 3 scraping mechanisms 85 are used to push the impurities in the collecting tank 17 to the impurity removing mechanism 14; the scraping mechanism 85 includes a lead screw 86, which is rotatably connected to the oil tank 2, and the lead screw 86 is driven by a second motor 87, and the second motor 87 is fixed to the oil tank 2; a slide 88 is installed on the lead screw 86, and the slide 88 is guided by a guide rod 89, and the guide rod 89 is fixed to the oil tank 2; an extension rod 90 is connected to the slide 88, and a sleeve 91 is slidably connected to the lower end of the extension rod 90, and a second spring 92 is connected to the lower end of the extension rod 90, and the second spring The lower end of 92 is connected to the sleeve 91; the bottom surface of the sleeve 91 is connected with a scraper 93, the width of the scraper 93 is smaller than the width of the collecting tank 17, the two end surfaces of the scraper 93 are connected with a shaft seat 94, the number of the shaft seats 94 is 2, an inclined plate 95 is rotatably connected to the shaft seat 94, a third spring 96 is connected between the inclined plates 95 on both sides, the third spring 96 makes the inclined plate 95 fit with the collecting tank 17, the second spring 92 is provided to make the scraper 93 and the inclined plate 95 adapt to the bottom surface of the collecting tank 17, the third spring 96 is provided to make the inclined plate 95 adapt to the side of the collecting tank 17, to ensure that the impurities in the collecting tank 17 are thoroughly cleaned, the slide 88 is driven to move by the second motor 87, so that the scraper 93 and the inclined plate 95 can clean the impurities in the collecting tank 17.

[0060] like Fig.26 and Fig. 27 As shown, as an optimization of the embodiment, considering that there are still suspended tiny impurities in the transformer oil, the side wall of the tank body 59 is connected with a side pipe 97, and the side pipe 97 is connected with a filter box 99 through a first elbow 98. A multi-stage filter screen 100 arranged from bottom to top is installed in the filter box 99, and the outlet of the filter box 99 is connected with an oil storage tank 102 through a second elbow 101, and an oil pump 103 is installed on the second elbow 101; the oil storage tank 102 is connected to the oil pillow 9 through a third elbow 104, and the oil storage tank 102 is connected to the oil pillow 9 through a support rod 105; by providing the oil pump 103, the transformer oil in the oil tank 2 can be sucked, so that the transformer oil forms a circulation, and the multi-stage filter screen 100 can clean the tiny impurities in the transformer oil during the circulation process.

[0061] like Fig.28 and Fig.29As shown, as an optimization of the embodiment, the filter box 99 is provided with rectangular grooves 106 arranged at equal intervals, the rectangular grooves 106 are located between the multi-stage filter screens 100, and the rectangular grooves 106 are connected to the filter plates 107, both ends of the filter plates 107 extend out of the filter box 99, and the filter plates 107 are provided with oil grooves 108, and the oil grooves 108 allow the transformer oil to exchange heat with the external environment, and the filter plates 107 located in the filter box 99 are provided with filter holes 109, and the filter holes 109 pass through the oil grooves 108. By setting the filter plates 107, the transformer oil can be further filtered, and the transformer oil can dissipate heat.

[0062] like Figure 30~Figure 32 As shown, as an optimization of the embodiment, the filter plate 107 is connected to an air supply pipe 110 that passes through the oil tank 108. The air supply pipes 110 are arranged at equal intervals, and both ends of the air supply pipe 110 extend out of the filter plate 107. Both ends of the air supply pipe 110 are connected to an air collecting box 111. The air collecting boxes 111 are connected in series through air supply pipes 112 to form a serpentine structure. A blower 113 is installed on the top air supply pipe 112. Air is supplied to the air collecting box 111 through the blower 113, and cold air enters the air supply pipe 110. The serpentine flowing cold air forms heat exchange with the transformer oil flowing from bottom to top, thereby accelerating the cooling of the transformer oil.

[0063] like Fig.33 As shown, as an optimization of the embodiment, considering the consumption of transformer oil, the existing transformer has no liquid level regulator, the bottom surface of the oil tank 2 is connected with the oil shell 114 by bolts, the oil shell 114 is installed with a bottom plate 115, the bottom surface of the oil tank 2 is installed with a top plate 116, an annular air bag 117 is installed between the top plate 116 and the bottom plate 115, a fourth spring 118 is installed between the top plate 116 and the bottom plate 115, the fourth spring 118 makes the top plate 116 and the oil tank 2 abut, an air injection pipe 119 is installed on the bottom plate 115, the lower end of the air injection pipe 119 extends outside the oil shell 114, the oil tank 2 is provided with an oil inlet channel 120 connected to the oil shell 114, and the liquid level of the transformer oil can be adjusted by injecting or exhausting air into the annular air bag 117 to avoid the problem of insufficient transformer oil.

[0064] Although the present invention has been described in detail with reference to the aforementioned examples, it is still possible for those skilled in the art to make and modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-dimensional wound core transformer, comprising a three-dimensional wound core (1) formed by splicing three identical rectangular single frames, an oil tank (2), a coil winding (3), a first clamping assembly (4), a second clamping assembly (5), a low-voltage bushing (6), a high-voltage bushing (7), a tap changer (8), and an oil pillow (9), characterized in that: The oil tank (2) is filled with transformer oil; a first clamping assembly (4) is provided in the oil tank (2), and a three-dimensional wound iron core (1) is provided on the first clamping assembly (4); a tank cover (10) is provided on the oil tank (2); the low-voltage bushing (6), the high-voltage bushing (7), the tap changer (8), and the oil pillow (9) are installed on the tank cover (10); a second clamping assembly (5) is provided in the oil tank (2), and a coil winding (3) is provided on the second clamping assembly (5), and the coil winding (3) includes a low-voltage coil (11) and a high-voltage coil (12), and the low-voltage coil (11) and the high-voltage coil (12) are respectively wound on the iron core column of the three-dimensional wound iron core (1), and the low-voltage bushing (6) and the high-voltage bushing (7) are respectively connected to the low-voltage coil (11). ) and the high-voltage coil (12); a through hole (13) is provided on the bottom surface of the oil tank (2); the number of the through holes (13) is 3, and the three through holes (13) are arranged at equal angles; a debris removal mechanism (14) is provided on the through hole (13); the debris removal mechanism (14) comprises a tank body (59); the tank body (59) is composed of a barrel section (60), a conical tube section (61), and a round tube section (62) arranged from top to bottom; the barrel section (60) is connected to the through hole (13), and a nut (63) is threadedly connected to the round tube section (62); the barrel section (60) located in the oil tank (2) is provided with a debris inlet pipe (64), and a guide plate (65) is provided on the side wall of the debris inlet pipe (64); the top surface of the debris inlet pipe (64) is rotatably connected to a rotating shaft (66), and the rotating shaft (66) An extension shaft (67) is provided at the upper end, the extension shaft (67) is rotatably connected to the tank cover (10), and the extension shaft (67) is driven by a first motor (68); a vortex disk (69) is provided on the rotating shaft (66), and vortex blades (70) arranged at equal angles are provided on the bottom surface of the vortex disk (69); a liquid outlet pipe (71) is provided on the top surface of the barrel section (60), the liquid outlet pipe (71) is located at the center of the barrel section (60), and the lower end of the liquid outlet pipe (71) extends deep into the tank body (59); the first clamping assembly (4) includes an insulating platform (29), the insulating platform (29) is located at the center of the oil tank (2), and the insulating platform (29) is fixed to the oil tank (2) by insulating bolts (30); a vertical rod (31) is provided on the insulating platform (29), and a limit block is provided on the vertical rod (31) (32), the number of the limit blocks (32) is 2, and the two limit blocks (32) are symmetrically arranged in an upper and lower direction; a positioning piece (33) is provided on the vertical rod (31), the number of the positioning pieces (33) is 2, and the two positioning pieces (33) are positioned by the limit blocks (32); the positioning piece (33) comprises a support seat (34) slidably connected to the vertical rod (31), the support seat (34) has three bifurcated arms (35), the bifurcated arms (35) are provided with baffles (36), and the baffles (36) are used to limit the outward movement of the three-dimensional coiled iron core (1); a sliding groove (37) is provided on the bifurcated arms (35), and a clamping arm (38) is slidably connected in the sliding groove (37), and the clamping arm (38) is arranged obliquely, and the clamping arm (38) is adapted to the inclined surface of the three-dimensional coiled iron core (1);A first hinge seat (39) is provided on the side wall of the clamping arm (38), a first screw rod (40) is hingedly connected to the first hinge seat (39), a double-headed screw tube (41) is threadedly connected to the first screw rod (40), a second screw rod (43) is threadedly connected to the other end of the double-headed screw tube (41), a second hinge seat (44) is hingedly connected to the second screw rod (43), a rotating tube (45) is provided on the second hinge seat (44), a driving nut (46) is rotatably connected to the rotating tube (45), and the driving nut (46) is threadedly connected to the vertical rod (31). ; 2. The three-dimensional wound core transformer according to claim 1, characterized in that: The oil tank (2) is formed by welding a tank bottom (15) and a tank body (16). The tank bottom (15) is hexagonal in shape, wherein three sides are long sides and three sides are short sides, which are arranged at intervals of one long and one short to form a flying saucer-like structure. A collecting groove (17) is provided at the edge of the top surface of the tank bottom (15). The collecting groove (17) is in the shape of an annular hexagon. The collecting groove (17) is the lowest point of the tank bottom (15). The short side of the collecting groove (17) is used to provide the through hole (13). The top surface of the tank bottom (15) has a sloped arched surface (18).

3. The three-dimensional wound core transformer according to claim 2, characterized in that: The box body (16) is in the shape of a hexagonal tube, wherein three sides are long sides and three sides are short sides, which are arranged at intervals of one long and one short. The long side section of the box body (16) is provided with a plurality of through slots (19), which are arranged at equal intervals. A heat sink (20) is provided on the through slots (19), and the heat sink (20) has a heat sink (21) connected to the oil tank (2). A reinforcing plate (22) is provided on the heat sink (20), and the reinforcing plate (22) connects the plurality of heat sinks (20) in series. A lower flange (23) is provided on the bottom side of the box body (16), and an upper flange (24) is provided on the top side of the box body (16), and the upper flange (24) is connected to the box cover (10) by bolts.

4. The three-dimensional wound core transformer according to claim 1, characterized in that: The second clamping assembly (5) comprises a foot seat (47), the foot seat (47) being connected to the arched surface (18) of the oil tank (2), a first frame (48) being provided on the foot seat (47), a first carrier plate (49) being provided on the first frame (48), the number of the first carrier plates (49) being three, the three first carrier plates (49) being located at the angle of the first frame (48), a first insulating seat (50) being provided on the first carrier plate (49), a second carrier plate (51) being provided on the long side section of the first frame (48), the second carrier plate (51) being provided with symmetrically arranged first insulating seats (50), a total of nine first insulating seats (50), three first insulating seats (50) forming a group, a first L-shaped seat (52) being provided on the first insulating seat (50), the first L-shaped seat (52) ) and the bottom surface of the coil winding (3); the first frame (48) is connected to the second frame (54) via a double-headed screw (53); the second frame (54) is provided with a third carrier plate (55), the number of the third carrier plates (55) is 3, the three third carrier plates (55) are located at the angle of the second frame (54), the third carrier plate (55) is provided with a second insulating seat (56), the long side section of the second frame (54) is provided with a fourth carrier plate (57), the fourth carrier plate (57) is provided with symmetrically arranged second insulating seats (56), a total of 9 second insulating seats (56), 3 second insulating seats (56) form a group, the second insulating seat (56) is provided with a second L-shaped seat (58), the second L-shaped seat (58) and the top surface of the coil winding (3) are adapted.

5. The three-dimensional wound core transformer according to claim 1, characterized in that: The cylindrical section (60) of the tank body (59) is provided with a material plate (72), the material plate (72) is composed of a first oblique section, a vertical section, and a second oblique section arranged from top to bottom, the material plate (72) divides the tank body (59) into two upper and lower parts, and the vertical section of the material plate (72) is provided with a material port (73); the cylindrical section (60) is provided with a branch pipe (74), the branch pipe (74) is provided with a flange (75), the flange (75) is provided with a valve cover (76), the valve cover (76) and the flange (75) are provided with an annular groove (77) on the opposite surfaces thereof, a rubber diaphragm (78) is provided in the annular groove (77), and the rubber diaphragm (78) and the valve cover (76) form a gas injection chamber , the valve cover (76) has an air inlet hole (79); a straight rod (80) is provided in the middle of the rubber diaphragm (78), a limit plate (81) is provided on the straight rod (80), the limit plate (81) is located in the air injection chamber, a T-shaped seat (82) is slidably connected to the straight rod (80), the large diameter section of the T-shaped seat (82) is adapted to the material port (73), a positioning nut (83) is threadedly connected to the straight rod (80), the positioning nut (83) is used to fix the T-shaped seat (82) on the straight rod (80), and a first spring (84) is sleeved on the side wall of the straight rod (80), and the first spring (84) is located between the limit plate (81) and the valve cover (76) in an elastic connection manner.

6. The three-dimensional wound core transformer according to claim 1, characterized in that: The oil tank (2) is provided with a scraping mechanism (85), the number of which is three. The three scraping mechanisms (85) are used to push impurities in the collecting tank (17) toward the impurity removal mechanism (14); the scraping mechanism (85) comprises a lead screw (86), the lead screw (86) is rotatably connected to the oil tank (2), and the lead screw (86) is driven by a second motor (87); a slide seat (88) is provided on the lead screw (86), the slide seat (88) is guided by a guide rod (89), and the guide rod (89) is fixed to the oil tank (2); an extension rod (90) is provided on the slide seat (88), and the extension rod (90) The lower end of the extension rod (90) is slidably connected to a sleeve (91), the lower end of the extension rod (90) is provided with a second spring (92), and the lower end of the second spring (92) is connected to the sleeve (91); a scraper (93) is provided on the bottom surface of the sleeve (91), the width of the scraper (93) is smaller than the width of the collecting trough (17), two end surfaces of the scraper (93) are provided with shaft seats (94), the number of the shaft seats (94) is two, an inclined plate (95) is rotatably connected to the shaft seat (94), a third spring (96) is provided between the inclined plates (95) on both sides, and the third spring (96) makes the inclined plate (95) fit with the collecting trough (17).

7. The three-dimensional wound core transformer according to claim 5, characterized in that: The side wall of the tank body (59) is provided with a side pipe (97), the side pipe (97) is connected to a filter box (99) via a first bent pipe (98), a multi-stage filter screen (100) arranged from bottom to top is provided in the filter box (99), the outlet of the filter box (99) is connected to an oil storage tank (102) via a second bent pipe (101), an oil pump (103) is provided on the second bent pipe (101); the oil storage tank (102) is connected to an oil pillow (9) via a third bent pipe (104), and the oil storage tank (102) and the oil pillow (9) are connected via a support rod (105).

8. The three-dimensional wound core transformer according to claim 7, characterized in that: The filter box (99) is provided with rectangular grooves (106) arranged at equal intervals, the rectangular grooves (106) being located between the multi-stage filter screens (100), a filter plate (107) being provided on the rectangular grooves (106), both ends of the filter plate (107) extending out of the filter box (99), an oil groove (108) being provided in the filter plate (107), and a filter hole (109) being provided on the filter plate (107) located in the filter box (99), the filter hole (109) passing through the oil groove (108).

9. The three-dimensional wound core transformer according to claim 8, characterized in that: An air supply pipe (110) passing through the oil tank (108) is provided on the filter plate (107). The air supply pipes (110) are arranged at equal intervals. Both ends of the air supply pipe (110) extend out of the filter plate (107). Both ends of the air supply pipe (110) are provided with air collecting boxes (111). The air collecting boxes (111) are connected in series through air delivery pipes (112) to form a serpentine structure. A blower (113) is provided on the uppermost air delivery pipe (112).

Images