Unpainted open dry type transformer

Abstract

The present invention discloses a non-painted open dry-type transformer, comprising: a base; a lower fixing unit and an upper fixing unit, wherein the lower fixing unit is installed on the base; a transformer coil assembly, wherein the transformer coil assembly is installed between the lower fixing unit and the upper fixing unit; wherein the coil of the transformer coil assembly is wound by a paint-filmed wire.

Description

Technical Field

[0001] The invention relates to the technical field of dry-type transformers, in particular to a non-paint-impregnated open dry-type transformer. Background Art

[0002] The existing open dry-type transformer uses NOMEX paper or other insulating paper, or non-woven fabrics and films as turn insulation. After the coil is wound and formed, the coil is dipped in paint as a whole, thereby improving the insulation and moisture-proof function of the turn insulation. However, due to the additional dipping process, special dipping equipment, drying equipment and special paint for dipping are required to match the dipping process, which has the disadvantages of high equipment investment and environmental pollution caused by insulating paint. In addition, adding a layer of paint film on the turn insulation will make it difficult for the coil to dissipate heat. If paint nodules are generated on the coil due to dipping, once the paint nodules crack, the coil insulation will be damaged and discharge will occur. Summary of the invention

[0003] To achieve the above object, the present invention discloses a non-painted open dry-type transformer, comprising:

[0004] Base;

[0005] A lower fixing unit and an upper fixing unit, wherein the lower fixing unit is installed on the base;

[0006] A transformer coil assembly, wherein the transformer coil assembly is installed between the lower fixing unit and the upper fixing unit;

[0007] Wherein, the coil of the transformer coil assembly is wound by a paint-filmed wire.

[0008] Preferably, the paint film has insulating and flame-retardant properties.

[0009] Preferably, the base is formed by welding a plurality of I-beams arranged horizontally and vertically, and the surface of the base is coated with insulating paint.

[0010] Preferably, a fixed central column is vertically installed between the lower fixing unit and the upper fixing unit, and the three transformer coil assembly arrays are distributed between the lower fixing unit and the upper fixing unit.

[0011] Preferably, the lower fixing unit comprises:

[0012] A lower fixing seat, the lower fixing seat is arranged in a triangular shape, the lower fixing seat is installed on the base, and a hollow opening is opened on the lower fixing seat;

[0013] An inclined placement platform, wherein three of the inclined placement platforms are distributed in an array on the lower fixed seat, and each of the inclined placement platforms occupies a triangular end of the lower fixed seat;

[0014] Wedge-shaped support plates, the wedge-shaped support plates are arranged at equal intervals on the top of the inclined placement platform, the bottom end of the transformer coil assembly is placed on the wedge-shaped support plates, and air inlet ducts are formed between adjacent wedge-shaped support plates;

[0015] An air outlet box, the air outlet box is installed at the center position of the top end of the lower fixed seat, the three inclined placement platforms are circumferentially arranged with the air outlet box as the center, the inclined placement platform is hinged to the side end of the air outlet box, the high end of the wedge-shaped support plate is arranged close to the air outlet box, the bottom end of the fixed center column is installed on the air outlet box, the air outlet hole is opened on the surface of the air outlet box, the air outlet hole is connected to the air inlet duct, and the surface of the fixed center column is opened with a spiral air guide groove;

[0016] A fan, wherein the fan is installed in the air outlet box;

[0017] Spacer blocks, three of which are arrayed on the lower fixing seat, each of which is located between two adjacent inclined placement platforms, and the partition is used to limit the side end of the transformer coil assembly to a position close to the bottom end.

[0018] Preferably, the upper fixing unit comprises:

[0019] An upper fixing seat, the lower fixing seat is arranged in a triangular shape, and the top end of the transformer coil assembly is arranged against the upper fixing seat;

[0020] Flexible limiting units, three of which are installed at the bottom end of the upper fixing seat close to the straight edge end, and each of which is used to limit the side ends of two adjacent transformer coil assemblies.

[0021] Preferably, the flexible limiting unit comprises:

[0022] Power chamber, two of the power chambers are symmetrically arranged in the upper fixing seat near the straight edge end;

[0023] A 90° flip opening, the 90° flip opening is opened at a side end of the upper fixing seat, and the 90° flip opening is connected to the power chamber;

[0024] A spline shaft, the spline shaft is installed in the power chamber;

[0025] A first rotating shaft, the first rotating shaft is installed in the power chamber through a rotating shaft installation block, the first rotating shaft is arranged parallel to the spline shaft, and the first rotating shaft is located above the spline shaft;

[0026] A pair of meshing spur gears, the spur gears are located in the power chamber, one of the spur gears is mounted on the spline shaft away from the 90° flip open end, and the other of the spur gears is mounted on the first rotating shaft;

[0027] a second rotating shaft, the second rotating shaft being rotatably mounted in the power chamber;

[0028] A pair of meshing helical gears, the helical gears are located in the power chamber, one of the helical gears is mounted on the end of the first rotating shaft away from the spur gear, and the other of the helical gears is mounted on the second rotating shaft;

[0029] A driving gear, the driving gear is located in the power chamber, and the driving gear and the bevel gear are coaxially mounted on the second rotating shaft;

[0030] A flip groove, the flip groove is opened at the bottom end of the upper fixed seat, the bottom end of the flip groove is connected to the power chamber, and the flip groove is located at the power chamber away from the 90° flip opening end;

[0031] A flip tube, the top of which extends from the flip groove into the power chamber, the top of which is installed in the power chamber via a third rotating shaft, and the flip tube is attached to the surface of the transformer coil assembly;

[0032] A fan-shaped toothed disc, the fan-shaped toothed disc is located in the power chamber, the fan-shaped toothed disc is installed at the top end of the flip tube, and the fan-shaped toothed disc is meshed with the driving gear;

[0033] A limiting slide groove, the limiting slide groove is transversely opened at the bottom end of the upper fixed seat, the bottom end of the limiting slide groove is connected to the power chamber, the limiting slide groove is located at the end of the power chamber close to the 90° flip opening, and the limiting slide groove is connected to the 90° flip opening;

[0034] A spline sleeve, the spline sleeve is located in the power chamber, and the spline sleeve is sleeved on the spline shaft;

[0035] A driving block, wherein the driving block is slidably connected in the limiting slide groove, the bottom end of the driving block is exposed from the bottom end of the upper fixed seat, the top end of the driving block extends into the power chamber and is connected to the spline sleeve;

[0036] A limiting transverse groove, the limiting transverse groove is arranged on the top of the power chamber;

[0037] A limit slider, the limit slider is arranged on the spline sleeve through a rotating bearing sleeve, and the limit slider is slidably connected in the limit transverse groove;

[0038] A return spring, the return spring is installed in the limit transverse groove, and the return spring is connected between the limit slider and the inner wall of the limit transverse groove;

[0039] A telescopic rod, the telescopic rod extending from the bottom end of the flip tube into the flip tube;

[0040] Limiting vertical grooves, two of which are oppositely arranged on the inner wall of the flip tube near the bottom end;

[0041] A vertical transmission block, the vertical transmission block is slidably connected in the limit vertical slot, and the vertical transmission block is connected to the telescopic rod;

[0042] A first spring, the first spring is located in the limiting vertical groove, and the first spring is connected between the inner wall of the limiting vertical groove and the vertical transmission block;

[0043] A fixing screw, the fixing screw being installed on the telescopic rod away from the flipping tube end;

[0044] A fixing ear portion, the fixing ear portion is connected to the edge end of the inclined placement table, and the fixing screw is adapted to be arranged on the fixing ear portion;

[0045] A fixing nut, the fixing nut is sleeved on the fixing screw, and the fixing nut is used to limit the fixing screw to be connected in the fixing ear;

[0046] A connecting rope, one end of which extends into the flip tube and is connected to the telescopic rod, and the other end of which extends from the flip groove into the power chamber and is connected to the limit slider;

[0047] A guide wheel is installed in the power chamber through a fourth rotating shaft, and the connecting rope runs on the guide wheel.

[0048] Preferably, the flexible limiting unit further includes:

[0049] A braided net is connected between the two flip tubes, the braided net is mounted on the telescopic rod through a hanging ear, and the braided net is sprayed with insulating paint.

[0050] Preferably, a return torsion spring is sleeved on the third rotating shaft, one torsion arm end of the return torsion spring is connected to the flip tube, and the other torsion arm end of the return torsion spring is connected to the inner wall of the power chamber.

[0051] Preferably, a limiting ring seat for fitting the spline sleeve is installed near the 90° flipped open end of the spline shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 It is the appearance diagram of the present invention;

[0054] Figure 2 The present invention is cut away Figure 1 (When the fixing screw and the fixing ear are connected);

[0055] Figure 3 A top view of the lower fixing seat of the present invention;

[0056] Figure 4 This is a schematic diagram of the wedge-shaped support plate structure in the present invention;

[0057] Figure 5 The present invention is cut away Figure 2 (When the telescopic rod is retracted into the flip tube);

[0058] Figure 6 The present invention is cut away Figure 3 (When the flip tube is turned inwards).

[0059] In the figure: 1. base; 2. lower fixing unit; 3. upper fixing unit; 4. transformer coil assembly; 20. fixed center column; 21. lower fixing seat; 22. tilting placement table; 23. wedge-shaped support plate; 24. air outlet box; 25. shaft mounting block; 26. spacer; 31. upper fixing seat; 32. flexible limit unit; 33. power chamber; 34. 90° flip opening; 35. spline shaft; 36. first rotating shaft; 37. spur gear; 38. second rotating shaft; 39. bevel gear; 30. driving gear; 41. flip groove; 42. flip tube; 43. fan-shaped toothed disc; 44. limit slide groove; 45. spline sleeve; 46. driving block; 47. limit transverse groove; 48. limit slide block; 49. reset spring; 40. telescopic rod; 51. fixing screw; 52. fixing ear; 53. connecting rope; 54. guide wheel; 55. woven net. DETAILED DESCRIPTION

[0060] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Example

[0062] The present invention will be further described below in conjunction with the accompanying drawings.

[0063] like Figure 1 As shown, this embodiment provides a non-painted open dry-type transformer, including:

[0064] Base 1;

[0065] A lower fixing unit 2 and an upper fixing unit 3, wherein the lower fixing unit 2 is installed on the base 1;

[0066] A transformer coil assembly 4, wherein the transformer coil assembly 4 is installed between the lower fixing unit 2 and the upper fixing unit 3;

[0067] The coil of the transformer coil assembly 4 is wound by a paint-filmed wire.

[0068] The working principle and beneficial effects of the above technical solution are:

[0069] The present invention discloses a non-paint-dipped open dry-type transformer, wherein the transformer coil assembly 4 is fixedly connected between the lower fixing unit 2 and the upper fixing unit 3, and the lower fixing unit 2 is installed on the base 1, and the coil of the transformer coil assembly 4 is wound by a wire with a paint film, and the types of the transformer coil assembly 4 include but are not limited to a three-dimensional wound core dry transformer, a laminated dry transformer, a three-dimensional wound core amorphous alloy dry transformer, and an amorphous alloy dry transformer. The non-paint-dipped open dry-type transformer provided by the present invention directly purchases wires with a paint film to wind the coil of the transformer coil assembly 4, and the paint film has the characteristics of high temperature resistance and high toughness, and the paint film replaces the turn insulation, so that after the coil is wound and formed, there is no need for a paint dipping process, and it can be used directly, eliminating the need to purchase special paint dipping equipment, drying equipment, and special paint for dipping, reducing equipment investment, and the product does not need to be dipped in paint, reducing the cost of paint, and does not need to be dried, reducing production time and electricity costs.

[0070] In one embodiment, the paint film has insulating and flame-retardant properties.

[0071] The beneficial effects of the above technical solution are:

[0072] The paint film has insulating and flame-retardant properties, thereby improving the safety of the transformer coil assembly 4 .

[0073] In one embodiment, the base 1 is formed by welding a plurality of I-beams arranged horizontally and vertically, and the surface of the base 1 is coated with insulating paint.

[0074] The beneficial effects of the above technical solution are:

[0075] The surface of the base 1 is coated with insulating paint, which improves the insulation of the dry-type transformer.

[0076] like Figure 2 As shown, in one embodiment, a fixed central column 20 is vertically installed between the lower fixing unit 2 and the upper fixing unit 3 , and the three transformer coil assemblies 4 are distributed in an array between the lower fixing unit 2 and the upper fixing unit 3 .

[0077] The working principle and beneficial effects of the above technical solution are:

[0078] A fixed central column 20 is vertically installed between the lower fixing unit 2 and the upper fixing unit 3 , thereby improving the stability of the three transformer coil assemblies 4 between the lower fixing unit 2 and the upper fixing unit 3 .

[0079] like Figure 3 , Figure 4 As shown, in one embodiment, the lower fixing unit 2 includes:

[0080] A lower fixing seat 21, which is triangular in shape and mounted on the base 1, and has a hollow opening;

[0081] An inclined placement platform 22, wherein three inclined placement platforms 22 are distributed in an array on the lower fixed seat 21, and each of the inclined placement platforms 22 occupies a triangular end of the lower fixed seat 21;

[0082] Wedge-shaped support plates 23, the wedge-shaped support plates 23 are arranged at equal intervals on the top of the inclined placement platform 22, the bottom end of the transformer coil assembly 4 is placed on the wedge-shaped support plates 23, and an air inlet duct is formed between adjacent wedge-shaped support plates 23;

[0083] The air outlet box 24 is installed at the center position of the top of the lower fixed seat 21. The three inclined placement platforms 22 are arranged circumferentially with the air outlet box 24 as the center. The inclined placement platform 22 is hinged to the side end of the air outlet box 24. The high end of the wedge-shaped support plate 23 is arranged close to the air outlet box 24. The bottom end of the fixed center column 20 is installed on the air outlet box 24. The surface of the air outlet box 24 is provided with an air outlet hole, and the air outlet hole is connected to the air inlet duct. The surface of the fixed center column 20 is provided with a spiral air guide groove;

[0084] A fan, the fan being installed in the air outlet box 24;

[0085] A spacer block 26, three of which are installed in an array on the lower fixing seat 21, each of which is located between two adjacent inclined placement platforms 22, and the spacer 26 is used to limit the side end of the transformer coil assembly 4 to a position close to the bottom end.

[0086] The working principle and beneficial effects of the above technical solution are:

[0087] The transformer coil assembly 4 is fed into the top of the inclined placement platform 22 from the triangular end of the lower fixed seat 21, and the bottom end of the transformer coil assembly 4 is fed into the top of the wedge-shaped support plate 23 from the lower end of the wedge-shaped support plate 23, and the transformer coil assembly 4 is fed into the direction close to the air outlet box 24. The transformer coil assembly 4 is set against the surface of the fixed central column 20, and the two spacers 26 limit the bottom end of the transformer coil assembly 4. The inclined placement platform 22 is turned upward with its hinged end as the center, and a rubber block is manually filled between the bottom end of the inclined placement platform 22 and the lower fixed seat 21, so that the inclined end of the wedge-shaped support plate 23 remains horizontal, so that the transformer The transformer coil assembly 4 is fixed between the wedge-shaped support plate 23 and the upper fixed unit 3. When the temperature of the transformer coil assembly 4 is too high, the fan located in the air outlet box 24 starts working, thereby driving the wind to blow out from the air outlet. Part of the wind flows into the air inlet duct formed between the adjacent wedge-shaped support plates 23, and part of the wind flows into the spiral air guide groove. The wind in the air inlet duct improves the air flow at the bottom end of the transformer coil assembly 4, and the wind in the spiral air guide groove improves the air flow at the side end of the transformer coil assembly 4. After the air flows out of the spiral air guide groove, the flow rate of the wind is slowed down to improve the heat dissipation effect of the transformer coil assembly 4.

[0088] like Figure 5 , Figure 6 As shown, in one embodiment, the upper fixing unit 3 includes:

[0089] An upper fixing seat 31, the lower fixing seat 21 is arranged in a triangular shape, and the top end of the transformer coil assembly 4 is arranged against the upper fixing seat 31;

[0090] Flexible limiting units 32, three of the flexible limiting units 32 are installed at the bottom end of the upper fixing seat 31 close to the straight edge end, and each of the flexible limiting units 32 is used to limit the side ends of two adjacent transformer coil assemblies 4.

[0091] The working principle and beneficial effects of the above technical solution are:

[0092] The three transformer coil assemblies 4 between the upper fixing seat 31 and the lower fixing seat 21 are limited and fixed by the flexible limiting units 32. The upper fixing seat 31, the lower fixing seat 21 and the three flexible limiting units 32 constitute a triangular prism-shaped limiting mechanism, which protects the transformer coil assembly 4 while improving the stability of the dry-type transformer structure.

[0093] In one embodiment, the flexible limiting unit 32 includes:

[0094] Power chambers 33, two of the power chambers 33 are symmetrically arranged in the upper fixing seat 31 near the straight edge end;

[0095] A 90° flip opening 34 , which is opened at a side end of the upper fixing seat 31 and communicates with the power chamber 33 ;

[0096] A spline shaft 35, wherein the spline shaft 35 is installed in the power chamber 33;

[0097] A first rotating shaft 36, wherein the first rotating shaft 36 is installed in the power chamber 33 through a rotating shaft installation block 25, the first rotating shaft 36 is arranged parallel to the spline shaft 35, and the first rotating shaft 36 is located above the spline shaft 35;

[0098] a pair of meshing spur gears 37, wherein the spur gears 37 are located in the power chamber 33, wherein one of the spur gears 37 is mounted on the end of the spline shaft 35 away from the 90° flip opening 34, and the other spur gear 37 is mounted on the first rotating shaft 36;

[0099] A second rotating shaft 38, the second rotating shaft 38 is rotatably mounted in the power chamber 33;

[0100] a pair of meshing helical gears 39, the helical gears 39 being located in the power chamber 33, one of the helical gears 39 being mounted on the end of the first rotating shaft 36 away from the spur gear 37, and the other of the helical gears 39 being mounted on the second rotating shaft 38;

[0101] A driving gear 30, wherein the driving gear 30 is located in the power chamber 33, and the driving gear 30 and the bevel gear 39 are coaxially mounted on the second rotating shaft 39;

[0102] A flip groove 41, the flip groove 41 is opened at the bottom end of the upper fixed seat 31, the bottom end of the flip groove 41 is connected to the power chamber 33, and the flip groove 41 is located at the end of the power chamber 33 away from the 90° flip opening 34;

[0103] A flip tube 42, the top end of which extends from the flip groove 41 into the power chamber 33, the top end of which is installed in the power chamber 33 via a third rotating shaft, and the flip tube 42 is attached to the surface of the transformer coil assembly 4;

[0104] A sector-shaped toothed disc 43, the sector-shaped toothed disc 43 is located in the power chamber 33, the sector-shaped toothed disc 43 is installed at the top of the flip tube 42, and the sector-shaped toothed disc 43 is meshed with the driving gear 30;

[0105] A limiting slide groove 44, the limiting slide groove 44 is transversely opened at the bottom end of the upper fixed seat 31, the bottom end of the limiting slide groove 44 is connected to the power chamber 33, the limiting slide groove 44 is located at the end of the power chamber 33 close to the 90° flip opening 34, and the limiting slide groove 44 is connected to the 90° flip opening 34;

[0106] A spline sleeve 45, the spline sleeve 45 is located in the power chamber 33, and the spline sleeve 45 is sleeved on the spline shaft 35;

[0107] A driving block 46, wherein the driving block 46 is slidably connected to the limiting slide groove 44, the bottom end of the driving block 46 is exposed from the bottom end of the upper fixing seat 31, and the top end of the driving block 46 extends into the power chamber 33 and is connected to the spline sleeve 45;

[0108] A limiting transverse groove 47, wherein the limiting transverse groove 47 is provided at the top of the power chamber 33;

[0109] A limit slider 48, wherein the limit slider 48 is mounted on the spline sleeve 45 via a rotating bearing sleeve, and the limit slider 48 is slidably connected in the limit transverse groove 47;

[0110] A return spring 49, wherein the return spring 49 is installed in the limit transverse groove 47, and the return spring 49 is connected between the limit slider 48 and the inner wall of the limit transverse groove 47;

[0111] A telescopic rod 40, the telescopic rod 40 extends from the bottom end of the flip tube 42 into the flip tube;

[0112] Limiting vertical grooves, two of which are oppositely disposed on the inner wall of the flip tube 42 near the bottom end;

[0113] A vertical transmission block, the vertical transmission block is slidably connected in the limit vertical groove, and the vertical transmission block is connected to the telescopic rod 40;

[0114] A first spring, the first spring is located in the limiting vertical groove, and the first spring is connected between the inner wall of the limiting vertical groove and the vertical transmission block;

[0115] A fixing screw 51, wherein the fixing screw 51 is installed at the end of the telescopic rod 40 away from the flip tube 42;

[0116] A fixing ear 52, wherein the fixing ear 52 is connected to the edge of the inclined placement platform 22, and the fixing screw 51 is adapted to be arranged on the fixing ear 52;

[0117] A fixing nut, which is sleeved on the fixing screw 51 and is used to limit the fixing screw 51 and connect it to the fixing ear 52;

[0118] A connecting rope 53, one end of which extends into the flip tube 42 and is connected to the telescopic rod 40, and the other end of which extends from the flip groove 41 into the power chamber 33 and is connected to the limit slider 48;

[0119] The guide wheel 54 is installed in the power chamber 33 through a fourth rotating shaft, and the connecting rope 53 runs on the guide wheel 54 .

[0120] The working principle and beneficial effects of the above technical solution are:

[0121] When it is necessary to replace a certain transformer coil assembly 4, since each transformer coil assembly 4 is close to the side edge position of the triangular prism-shaped limiting mechanism, it is only necessary to disassemble the flip tube 42 close to the side edge position of the triangular prism-shaped limiting mechanism. The specific disassembly steps are as follows: after unscrewing the fixing nut, the fixing screw 51 is separated from the fixing ear 52, and at this time, the tilting placement table 22 is flipped downward with its hinge end as the center, the wedge-shaped support plate 23 is tilted, and the top part of the transformer coil assembly 4 is separated from the upper fixed seat 31, and the drive block 46 is manually slid along the limiting slide groove 44 toward the direction close to the 90° flip opening 34. At this time, the reset spring 49 located in the limiting transverse groove 47 is stretched, and the drive block 46 drives the spline sleeve 45 on the spline shaft 35 to move in the stretching direction of the reset spring 49. The limit slider 48 arranged on the spline sleeve 45 by rotating the bearing moves in the pulling direction of the return spring 49, and the limit slider 48 pulls the telescopic rod 40 along the guide wheel 54 into the flip tube 42 through the connecting rope 53. When the driving block 46 slides into the 90° flip opening 34, the driving block 46 is flipped upward. Under the reset action of the return spring 49, the driving block 46 is stuck in the 90° flip opening 34, so that the driving block 46 drives the spline shaft 35 to rotate through the spline sleeve 45, and the spline shaft 35 located in the power chamber 33 drives the first rotating shaft 36 to rotate on the rotating shaft mounting block 25 through a pair of meshing spur gears 37, and the first rotating shaft 36 drives the second rotating shaft 38 to rotate in the power chamber 33 through a pair of meshing bevel gears 39, thereby driving the mounting block 25. The driving gear 30 mounted on the second rotating shaft 38 rotates, and the driving gear 30 drives the top end of the flip tube 42 to flip inward with the third rotating shaft as the center through the fan-shaped toothed disc 43. At this time, it is only necessary to keep the bottom end of the transformer coil assembly 4 tilted outward, and then slide the transformer coil assembly 4 out of the side edge position of the triangular prism-shaped limiting mechanism along the inclined end of the wedge-shaped support plate 23. Furthermore, the flip groove 41 and the limiting slide groove 44 are connected and arranged, so that the flip tube 42 can be flipped inward with the third rotating shaft as the center and put into the power chamber 33. In this way, it is only necessary to slide the transformer coil assembly 4 out of the side edge position of the triangular prism-shaped limiting mechanism along the inclined end of the wedge-shaped support plate 23 in the horizontal direction. When the transformer coil assembly 4 at this position is replaced, The replaced transformer coil assembly 4 is pushed onto the wedge-shaped support plate 23 from the side edge position of the triangular prism-shaped limiting mechanism, and the driving block 46 is reversely flipped downward in the 90° flip opening 34, so that the spline shaft 35 rotates in the opposite direction, so that the flip tube 42 is flipped outward to a vertical state with the third rotating shaft as the center. At this time, the driving block 46 is slid into the limiting slide groove 44 again. Under the reset and contraction of the reset spring 49, the limiting slider 48 releases the tension on the connecting rope 53, and the telescopic rod 40 drives the fixing screw 51 to extend out of the flip tube 42. After the tilting platform 22 is lifted upward, the fixing screw 51 is sent into the fixing ear 52 and fixed by the fixing nut. A gap is left between the tilting platform 22 and the lower fixing seat 21, causing the bottom end of the tilting platform 22 to be suspended.While reducing the heat accumulation on the lower fixing seat 21, the air flow at the bottom of the transformer coil assembly 4 is improved.

[0122] In one embodiment, the flexible limiting unit 32 further includes:

[0123] The braided mesh 55 is connected between the two flip tubes 42 . The braided mesh 55 is mounted on the telescopic rod 40 through a hanging ear. The braided mesh 55 is sprayed with insulating paint.

[0124] The beneficial effects of the above technical solution are:

[0125] The braided net 55 is provided to protect the side surface of the triangular prism-shaped limiting mechanism, and the braided net 55 will not cause interference when the telescopic rod 40 is retracted into the flip tube 42 or the flip tube 42 is folded inward.

[0126] In one embodiment, a return torsion spring is sleeved on the third rotating shaft, one torsion arm end of the return torsion spring is connected to the flip tube 42 , and the other torsion arm end of the return torsion spring is connected to the inner wall of the power chamber 33 .

[0127] In one embodiment, a limiting ring seat for fitting the spline sleeve 45 is installed at the end of the spline shaft 35 close to the 90° flip opening 34 .

[0128] The beneficial effects of the above technical solution are:

[0129] The setting of the limiting ring seat is convenient for limiting the movement of the spline sleeve 45 on the spline shaft 35.

[0130] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A non-painted open dry-type transformer, characterized in that: include: Base (1); A lower fixing unit (2) and an upper fixing unit (3), wherein the lower fixing unit (2) is mounted on the base (1); A transformer coil assembly (4), the transformer coil assembly (4) being installed between the lower fixing unit (2) and the upper fixing unit (3); Wherein, the coil of the transformer coil assembly (4) is wound by a wire with a paint film; A fixed central column (20) is vertically installed between the lower fixing unit (2) and the upper fixing unit (3), and the three transformer coil assemblies (4) are distributed in an array between the lower fixing unit (2) and the upper fixing unit (3); The lower fixing unit (2) comprises: A lower fixing seat (21), the lower fixing seat (21) is arranged in a triangular shape, the lower fixing seat (21) is installed on the base (1), and a hollow opening is opened on the lower fixing seat (21); An inclined placement platform (22), wherein three of the inclined placement platforms (22) are distributed in an array on the lower fixed seat (21), and each of the inclined placement platforms (22) occupies a triangular end of the lower fixed seat (21); wedge-shaped support plates (23), the wedge-shaped support plates (23) being arranged at equal intervals on the top of the inclined placement platform (22), the bottom end of the transformer coil assembly (4) being placed on the wedge-shaped support plates (23), and air inlet ducts being formed between adjacent wedge-shaped support plates (23); An air outlet box (24), the air outlet box (24) is installed at the center position of the top end of the lower fixed seat (21), the three inclined placement platforms (22) are arranged circumferentially with the air outlet box (24) as the center, the inclined placement platform (22) is hinged to the side end of the air outlet box (24), the high end of the wedge-shaped support plate (23) is arranged close to the air outlet box (24), the bottom end of the fixed central column (20) is installed on the air outlet box (24), the air outlet hole is opened on the surface of the air outlet box (24), the air outlet hole is connected to the air inlet duct, and the surface of the fixed central column (20) is opened with a spiral air guide groove; a fan, the fan being installed in the air outlet box (24); A spacer block (26), wherein three spacers (26) are mounted in an array on the lower fixing seat (21), each of the spacers (26) being located between two adjacent inclined placement platforms (22), and the spacer block (26) is used to limit the side end of the transformer coil assembly (4) to a position close to the bottom end.

2. The non-painted open dry-type transformer according to claim 1, characterized in that: The paint film has the characteristics of insulation and flame retardancy.

3. The non-painted open dry-type transformer according to claim 1, characterized in that: The base (1) is formed by welding a plurality of I-beams arranged horizontally and vertically, and the surface of the base (1) is coated with insulating paint.

4. The non-painted open dry-type transformer according to claim 1, characterized in that: The upper fixing unit (3) comprises: An upper fixing seat (31), the lower fixing seat (21) being arranged in a triangular shape, and the top end of the transformer coil assembly (4) being arranged against the upper fixing seat (31); Flexible limiting units (32), three of the flexible limiting units (32) are installed at the bottom end of the upper fixing seat (31) close to the straight edge end, and each of the flexible limiting units (32) is used to limit the side ends of two adjacent transformer coil assemblies (4).

5. The non-painted open dry-type transformer according to claim 4, characterized in that: The flexible limiting unit (32) comprises: A power chamber (33), wherein two power chambers (33) are symmetrically arranged in the upper fixing seat (31) near the straight edge end; A 90° flip opening (34), the 90° flip opening (34) being opened at a side end of the upper fixing seat (31), the 90° flip opening (34) being connected to the power chamber (33); A spline shaft (35), wherein the spline shaft (35) is installed in the power chamber (33); a first rotating shaft (36), the first rotating shaft (36) being installed in the power chamber (33) via a rotating shaft installation block (25), the first rotating shaft (36) being arranged parallel to the spline shaft (35), and the first rotating shaft (36) being located above the spline shaft (35); a pair of meshing spur gears (37), the spur gears (37) being located in the power chamber (33), one of the spur gears (37) being mounted on the end of the spline shaft (35) away from the 90° flip opening (34), and the other of the spur gears (37) being mounted on the first rotating shaft (36); a second rotating shaft (38), the second rotating shaft (38) being rotatably mounted in the power chamber (33); a pair of meshing helical gears (39), the helical gears (39) being located in the power chamber (33), one of the helical gears (39) being mounted on the end of the first rotating shaft (36) away from the spur gear (37), and the other of the helical gears (39) being mounted on the second rotating shaft (38); A driving gear (30), the driving gear (30) being located in the power chamber (33), the driving gear (30) being coaxially mounted on the second rotating shaft (38) with the bevel gear (39); A turning groove (41), the turning groove (41) being formed at the bottom end of the upper fixing seat (31), the bottom end of the turning groove (41) being connected to the power chamber (33), and the turning groove (41) being located at the end of the power chamber (33) away from the 90° turning opening (34); A flip tube (42), the top end of the flip tube (42) extending from the flip groove (41) into the power chamber (33), the top end of the flip tube (42) being installed in the power chamber (33) via a third rotating shaft, and the flip tube (42) being arranged on the surface of the transformer coil assembly (4); A sector-shaped toothed disc (43), the sector-shaped toothed disc (43) being located in the power chamber (33), the sector-shaped toothed disc (43) being mounted on the top end of the flip tube (42), and the sector-shaped toothed disc (43) being meshed with the driving gear (30); A limiting slide groove (44), the limiting slide groove (44) is transversely opened at the bottom end of the upper fixed seat (31), the bottom end of the limiting slide groove (44) is connected to the power chamber (33), the limiting slide groove (44) is located at the end of the power chamber (33) close to the 90° flip opening (34), and the limiting slide groove (44) is connected to the 90° flip opening (34); A spline sleeve (45), the spline sleeve (45) being located in the power chamber (33), and the spline sleeve (45) being sleeved on the spline shaft (35); A driving block (46), the driving block (46) being slidably connected in the limiting sliding groove (44), the bottom end of the driving block (46) being exposed from the bottom end of the upper fixing seat (31), the top end of the driving block (46) extending into the power chamber (33) and being connected to the spline sleeve (45); A limiting transverse groove (47), wherein the limiting transverse groove (47) is formed at the top of the power chamber (33); A limiting slider (48), the limiting slider (48) being mounted on the spline sleeve (45) via a rotating bearing sleeve, and the limiting slider (48) being slidably connected in the limiting transverse groove (47); a return spring (49), the return spring (49) being installed in the limit transverse groove (47), the return spring (49) being connected between the limit slide block (48) and the inner wall of the limit transverse groove (47); A telescopic rod (40), the telescopic rod (40) extending from the bottom end of the flip tube (42) into the flip tube; Limiting vertical grooves, two of the limiting vertical grooves being oppositely arranged on the inner wall of the flip tube (42) near the bottom end; A vertical transmission block, the vertical transmission block being slidably connected in the limiting vertical groove, the vertical transmission block being connected to the telescopic rod (40); A first spring, the first spring is located in the limiting vertical groove, and the first spring is connected between the inner wall of the limiting vertical groove and the vertical transmission block; A fixing screw (51), the fixing screw (51) being mounted on the end of the telescopic rod (40) away from the flip tube (42); A fixing ear (52), the fixing ear (52) being connected to an edge end of the inclined placement platform (22), and the fixing screw (51) being adapted to be arranged on the fixing ear (52); a fixing nut, the fixing nut being sleeved on the fixing screw (51), the fixing nut being used to positionally connect the fixing screw (51) into the fixing ear (52); a connecting rope (53), one end of the connecting rope (53) extending into the flip tube (42) and connected to the telescopic rod (40), and the other end of the connecting rope (53) extending from the flip groove (41) into the power chamber (33) and connected to the limit slider (48); A guide wheel (54), wherein the guide wheel (54) is installed in the power chamber (33) via a fourth rotating shaft, and the connecting rope (53) runs on the guide wheel (54).

6. The non-painted open dry-type transformer according to claim 5, characterized in that: The flexible limiting unit (32) further comprises: A braided net (55), the braided net (55) is connected between the two flip tubes (42), the braided net (55) is mounted on the telescopic rod (40) via a hanging ear, and the braided net (55) is sprayed with insulating paint.

7. The non-painted open dry-type transformer according to claim 5, characterized in that: A return torsion spring is sleeved on the third rotating shaft, one torsion arm end of the return torsion spring is connected to the flip tube (42), and the other torsion arm end of the return torsion spring is connected to the inner wall of the power chamber (33).

8. The non-painted open dry-type transformer according to claim 5, characterized in that: A limiting ring seat for fitting the spline sleeve (45) is installed at the end of the spline shaft (35) close to the 90° flip opening (34).

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