A vibration-resistant fixing device for ultra-large capacity dry-type transformer

Abstract

The present invention discloses an anti-vibration fixing device for an ultra-large capacity dry-type transformer, which relates to the technical field of transformers and includes a lower clamp, a stacked iron core is provided between two groups of lower clamps, a front pull plate is fixedly installed on the top of the clamp, and the front pull plate and the rear pull plate are both provided with a groove one on the side facing the stacked iron core, a spring one and a pressure sensor are installed on the inner wall of the groove one, and the outer sides of the front pull plate, the rear pull plate and the stacked iron sheets are wrapped with a binding band. The present invention squeezes and fixes the stacked iron sheets by providing the front pull plate, the rear pull plate and the binding band, thereby avoiding the phenomenon that gaps between the iron cores are formed due to the shrinkage and deformation of the stacked iron sheets, thereby providing a vibration space for the iron cores during the operation of the dry-type transformer, which is beneficial to improving the operating stability and anti-vibration effect of the dry-type transformer. By providing a flexible rack and a binding band, the area enclosed by the binding band can be adjusted to avoid the phenomenon that the binding band slips, which is beneficial to further improving the fixing effect of the stacked iron sheets.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, in particular to an anti-vibration fixing device for an ultra-large capacity dry-type transformer. Background Art

[0002] A dry-type transformer is a special type of transformer whose core and windings are not immersed in insulating oil but instead cooled by air convection and other methods. It is flame-retardant, fireproof, explosion-proof, and environmentally friendly. It primarily consists of a core made of silicon steel sheets and windings cast in epoxy resin. An insulating cylinder is placed between the high- and low-voltage windings to provide electrical insulation, and spacers support and restrain the coils. However, existing dry-type transformers experience shrinkage and deformation due to thermal expansion when stacked cores are used. This creates gaps between the cores, creating space for them to shake and increase the adverse effects of vibration on the core.

[0003] The defects of existing transformers are:

[0004] 1. Patent document CN213400753U mainly considers how to improve the safety during the lifting process, but does not consider how to improve the fixation effect of the stacked cores and enhance the vibration resistance of the dry-type transformer;

[0005] 2. Patent document CN212659420U mainly considers how to prevent the coil from becoming loose, but does not consider how to improve the relative position stability of the high-voltage coil housing, insulating housing, and low-voltage coil housing;

[0006] 3. Patent document CN118486528B mainly considers how to improve the cooling effect of the dry-type transformer, but does not consider how to facilitate the installation of the high-voltage coil shell, the insulating shell, the low-voltage coil shell and the auxiliary structures therebetween. Summary of the Invention

[0007] The object of the present invention is to provide an anti-vibration fixing device for an ultra-large capacity dry-type transformer to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an anti-vibration fixing device for an ultra-large capacity dry-type transformer, comprising lower clamps, wherein the lower clamps are installed in two groups, a stacked iron core is provided between the two groups of lower clamps, a front pull plate is fixedly installed on the top of the front pull plate, an upper clamp is installed on the top of the front pull plate, and a rear pull plate is slidably connected to the top of the rear pull plate, and the upper clamp is slidably connected to the top of the rear pull plate;

[0009] The front pull plate and the rear pull plate are each provided with a groove one on the side facing the stacked iron core, and a spring one and a pressure sensor are installed on the inner wall of the groove one, and the pressure sensor is located between two adjacent groups of springs one, and an extrusion plate is connected to the end of the spring one facing the stacked iron sheets, and the outer sides of the front pull plate, the rear pull plate and the stacked iron sheets are wrapped with binding belts, and a flexible rack is installed on the outer wall of the binding belt, and a servo motor is installed on the inner wall of the upper clamp, and the output end of the servo motor is connected to a mounting shaft, and a gear is sleeved on the outer wall of the mounting shaft, and the gear is meshed with the flexible rack.

[0010] Preferably, one end of the binding belt is fixedly embedded in and connected to the outer wall of the rear pull plate, and the other end of the binding belt overlaps with the fixed end of the binding belt.

[0011] Preferably, a lower pad is installed on the top of the lower clamp, and the lower pad is located on the front side of the front pull plate or the rear side of the rear pull plate. The top of the lower gasket is installed with a low-voltage coil shell, an insulating shell and a high-voltage coil shell in sequence from the inside to the outside, and the low-voltage coil shell, the insulating shell and the high-voltage coil shell are coaxially arranged.

[0012] Preferably, a hollow rod is installed on the top of the lower pad, and the hollow rod is located between the low-voltage coil shell and the insulating shell, and between the insulating shell and the high-voltage coil shell. The outer wall of the hollow rod is sleeved with a fixing plate, and the outer wall of the fixing plate is sleeved with a hollow tube. The fixing plate is fixedly connected to the hollow rod and the hollow tube respectively. Rubber pads are installed on the top and bottom of the fixing plate. The outer wall of the hollow rod is sleeved with an adjusting plate, and the adjusting plate is slidingly connected to the outer wall of the hollow rod. A spring 2 is installed between the adjusting plate and the rubber pad. The side of the adjusting plate away from the fixing plate is hinged with an oblique rod, and the end of the oblique rod away from the adjusting plate is hinged with an arc plate.

[0013] Preferably, the inner wall of the arc plate is respectively fitted with the outer wall of the low-voltage coil shell and the inner wall of the insulating shell, and the outer wall of the insulating shell is respectively fitted with the inner wall of the high-voltage coil shell.

[0014] Preferably, a limit block is installed through the outer wall of the hollow rod, and connecting blocks are installed on the top and bottom of the limit block. A spring three is embedded in the inner wall of the hollow rod, and one end of the spring three is fixedly connected to the outer wall of the connecting block. A mounting groove is provided inside the lower pad, and a shaft rod is fixedly provided on the bottom wall of the mounting groove. A worm gear is sleeved on the outer wall of the shaft rod, and a square frame is installed on the top of the worm gear. A square rod is inserted into the inner wall of the square frame, and a screw rod is connected to the top of the square rod. A trapezoidal platform is sleeved on the outer wall of the screw rod, and the trapezoidal platform is located between two groups of limit blocks arranged symmetrically. A limit plate is installed on the outer wall of the trapezoidal platform, and the limit plate is embedded in the inner wall of the hollow rod. A worm gear is installed through the outer wall of the lower pad, and the worm gear is meshed with the worm gear.

[0015] Preferably, the adjusting plates are symmetrically arranged with respect to the fixing plates, and the limiting blocks are respectively located above the upper group of adjusting plates and below the lower group of adjusting plates.

[0016] Preferably, a gear ring is embedded in the outer wall of the lower pad, and the gear ring is located on the outside of the worm, a torsion frame is installed at the right end of the worm, a telescopic rod is installed on the back of the torsion frame, and a toothed block is installed at the output end of the telescopic rod, which is engaged with the gear ring.

[0017] Preferably, a base is installed at the bottom of the lower clamping member.

[0018] Preferably, a fan is installed on the top of the base, and the fans are respectively located on the front and rear sides of the two groups of lower clamps.

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

[0020] 1. The present invention squeezes and fixes the stacked iron sheets by arranging front pull plates, rear pull plates and binding belts, thereby avoiding the phenomenon of gaps between the iron cores due to shrinkage and deformation of the stacked iron sheets, thereby providing vibration space for the iron cores during operation of the dry-type transformer, which is beneficial to improving the operating stability and vibration resistance of the dry-type transformer. By arranging flexible racks and binding belts, the area enclosed by the binding belts can be adjusted to avoid the phenomenon of the binding belts slipping, which is beneficial to further improving the fixing effect of the stacked iron sheets.

[0021] 2. The present invention forms a "V"-shaped adjustment structure between the low-voltage coil shell and the insulating shell, and between the insulating shell and the high-voltage coil shell by installing arc plates, inclined rods and hollow tubes, thereby converting the lateral vibration force generated during the vibration process into longitudinal vibration force, and absorbing and buffering the longitudinal vibration force, thereby avoiding lateral movement of the low-voltage coil shell, the insulating shell or the high-voltage coil shell, which is beneficial to maintaining the relative position and distance between the three and the stacked iron core, ensuring the normal operation of the dry-type transformer.

[0022] 3. The present invention limits the adjustment piece by setting a limit block, thereby realizing the position restriction of the arc plate, facilitating the installation of the low-voltage coil shell, the insulating shell and the high-voltage coil shell, and being beneficial to improving the assembly efficiency of the dry-type transformer. After the low-voltage coil shell, the insulating shell and the high-voltage coil shell are installed, the worm is rotated to drive the turbine to rotate, and then the square rod drives the lead screw to rotate, so that the trapezoidal table moves upward, and the limit block is retracted into the hollow rod under the push of spring three, and spring two pushes the adjustment piece to move, so that the oblique rod pushes the arc plate to fit respectively with the inner wall of the high-voltage coil shell, the inner and outer walls of the insulating shell and the outer wall of the low-voltage coil shell, thereby realizing auxiliary fixation of the three.

[0023] 4. The present invention fixes the worm by installing a toothed block and a toothed ring, thereby preventing the worm from rotating due to the existence of operating vibration during the operation of the dry-type transformer, thereby preventing the worm wheel from driving the square rod and the lead screw to rotate, causing the position of the trapezoidal table to change and resulting in the position of the limit block to be unfixed, affecting the movement of the adjustment piece, ensuring the normal use of the arc plate, the oblique rod and the adjustment piece, and improving the position fixing effect of the low-voltage coil shell, the insulating shell and the high-voltage coil shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a side structural diagram of the upper clamping piece and the lower clamping piece of the present invention;

[0026] Figure 3 This is a schematic diagram of the binding belt structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the front pull plate structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the hollow rod structure of the present invention;

[0029] Figure 6 Schematic diagram of the hollow tube structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the square rod structure of the present invention;

[0031] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure at point A;

[0032] Figure 9 It is a schematic diagram of the structure of the lower pad of the present invention;

[0033] Figure 10 Schematic diagram of the gear ring structure of the present invention.

[0034] In the figure: 1. Lower clamp; 2. Upper clamp; 3. Stacked core; 4. Front pull plate; 5. Groove 1; 6. Spring 1; 7. Pressure sensor; 8. Extrusion plate; 9. Binding belt; 10. Flexible rack; 11. Servo motor; 12. Gear; 13. Rear pull plate; 14. Lower pad; 15. Low-voltage coil housing; 16. Insulation housing; 17. High-voltage coil housing; 18. Hollow rod; 19. Fixing plate; 20. Hollow tube; 21 , rubber pad; 22. Adjustment plate; 23. Spring 2; 24. Oblique rod; 25. Arc plate; 26. Mounting slot; 27. Worm gear; 28. Square frame; 29. ​​Square rod; 30. Screw; 31. Trapezoidal table; 32. Limit plate; 33. Limit block; 34. Connecting block; 35. Spring 3; 36. Worm; 37. Torsion frame; 38. Telescopic rod; 39. Toothed block; 40. Gear ring; 41. Base; 42. Fan. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] See also Figure 2 、 Figure 3 and Figure 4 , an embodiment provided by the present invention: an anti-vibration fixing device for an ultra-large capacity dry-type transformer, comprising a lower clamp 1, wherein the number of installation groups of the lower clamp 1 is two groups, and the side of the two groups of lower clamps 1 close to each other is a plane, a stacked iron core 3 is arranged between the two groups of lower clamps 1, the two groups of lower clamps 1 respectively clamp the stacked iron core 3 from the front and back sides of the bottom of the stacked iron core 3, a front pull plate 4 is fixedly installed on the top of the front group of lower clamps 1, an upper clamp 2 is installed on the top of the front pull plate 4, and a rear pull plate 13 is slidably connected to the top of the rear pull plate 13, and the upper clamp 2 is slidably connected to the top of the two groups of upper clamps 2. The two groups of upper clamps 2 respectively clamp the stacked iron core 3 from the front and back sides of the top of the stacked iron core 3;

[0039] A groove 5 is provided on the side of the front pull plate 4 and the rear pull plate 13 facing the stacked iron core 3, and the groove 5 is located in the middle section of the front pull plate 4 and the rear pull plate 13. A layer of rubber pad 21 is provided on the inner wall of the groove 5, so that the groove 5 is a groove 5 with 21 layers of rubber pad. A spring 6 and a pressure sensor 7 are installed on the inner wall of the groove 5, and the pressure sensor 7 is located between two adjacent groups of springs 6. An end of the spring 6 facing the stacked iron sheet is connected to an extrusion plate 8, and a layer of rubber pad 21 is provided on the outer wall of the extrusion plate 8 facing the stacked iron sheet. By providing the rubber pad 21 layer, a buffer and protection are provided for the foundation between the extrusion plate 8 and the stacked iron sheet to prevent the extrusion plate 8 from being pressed against the stacked iron sheet. The stacked iron sheets cause damage, and the outer sides of the front pull plate 4, the rear pull plate 13 and the stacked iron sheets are wrapped with a binding belt 9. One end of the binding belt 9 is fixedly embedded in the outer wall of the rear pull plate 13 and fixedly connected to the back of the rear pull plate 13. The other end of the binding belt 9 overlaps with the fixed end of the binding belt 9, and the other end of the binding belt 9 is slidingly connected to the outer wall of the fixed end of the binding belt 9. A flexible rack 10 is installed on the outer wall of the binding belt 9, and a servo motor 11 is installed on the inner wall of a group of upper clamps 2 on the front side. The output end of the servo motor 11 is connected to a mounting shaft, which passes through the bottom wall before the upper shelf and extends to the front of the front pull plate 4. A gear 12 is provided on the outer wall of the mounting shaft, and the gear 12 is meshed with the flexible rack 10.

[0040] Furthermore, the stacked core 3 is tied and fixed by setting a front pull plate 4, a rear pull plate 13 and a binding belt 9. When the stacked core 3 in the dry-type transformer shrinks and deforms after thermal expansion, the extrusion force of the stacked core 3 on the extrusion plate 8 is reduced, so that the detection data of the pressure sensor 7 becomes smaller. At this time, the servo motor 11 drives the installation shaft to rotate, and then drives the gear 12 to rotate. The gear 12 engages with the flexible rack 10, so that the flexible rack 10 drives the free end of the binding belt 9 to move toward the fixed end. That is to say, the size of the overlapping part of the two ends of the binding belt 9 is increased, so that the closed area surrounded by the binding belt 9 is reduced, and then the rear pull plate 13 is driven along the bottom of the upper clamp 2 and the top of the lower clamp 1 The front portion moves toward the direction close to the front pull plate 4, providing extrusion for the stacked iron sheets that have shrunk and deformed. When the pressure sensor 7 detects data and restores the original data, the servo motor 11 is turned off. By setting the front pull plate 4, the rear pull plate 13 and the binding belt 9, the stacked iron sheets are squeezed and fixed to avoid the gaps between the iron cores due to the shrinkage and deformation of the stacked iron sheets, thereby providing vibration space for the iron cores during the operation of the dry-type transformer, which is beneficial to improving the operating stability and anti-vibration effect of the dry-type transformer. By setting the flexible rack 10 and the binding belt 9, the area surrounded by the binding belt 9 can be adjusted to avoid the binding belt 9 from slipping, which is beneficial to further improving the fixing effect of the stacked iron sheets.

[0041] See also Figure 2 、 Figure 6 and Figure 7, an embodiment provided by the present invention: an anti-vibration fixing device for an ultra-large capacity dry-type transformer, comprising a lower pad 14 installed on the top of a lower clamp 1, the lower pad 14 is located on the front side of the front pull plate 4 or the rear side of the rear pull plate 13, and a low-voltage coil shell 15, an insulating shell 16 and a high-voltage coil shell 17 are installed on the top of the lower pad in sequence from the inside to the outside, and the low-voltage coil shell 15, the insulating shell 16 and the high-voltage coil shell 17 are coaxially arranged, the lower pad 14 provides support for the low-voltage coil shell 15, the insulating shell 16 and the high-voltage coil shell 17, a hollow rod 18 is installed on the top of the lower pad 14, and the hollow rod 18 is located between the low-voltage coil shell 15 and the insulating shell 16 and between the insulating shell 16 and the high-voltage coil shell 17, the outer wall of the hollow rod 18 is sleeved with a fixing plate 19, the outer wall of the fixing plate 19 is sleeved with a hollow tube 20, the fixing plate 19 is fixedly connected to the hollow rod 18 and the hollow tube 20 respectively, and the hollow tube 20 is along the dry-type There are multiple groups of transformers in the height direction. Rubber pads 21 are installed on the top and bottom of the fixing piece 19. The outer wall of the hollow rod 18 is provided with an adjusting piece 22. The adjusting piece 22 is slidably connected to the outer wall of the hollow rod 18, and the outer wall of the adjusting piece 22 is slidably connected to the inner wall of the hollow tube 20. There are two groups of adjusting pieces 22 installed in each group of hollow rods 18, and they are symmetrically arranged about the fixing piece 19. A spring 23 is installed between the adjusting piece 22 and the rubber pad 21. The spring 16 is located on the outside of the hollow rod 18. The side of the adjusting piece 22 away from the fixing piece 19 is hinged with an oblique rod 24. The end of the oblique rod 24 away from the adjusting piece 22 is hinged with an arc plate 25. The inner wall of the arc plate 25 is respectively fitted with the outer wall of the low-voltage coil shell 15 and the inner wall of the insulating shell 16, and the outer wall of the insulating shell 16 is fitted with the inner wall of the high-voltage coil shell 17. A through groove is opened on the outer wall of the hollow tube 20, and the through groove provides movement space for the oblique rod 24.

[0042] Furthermore, by arranging the arc plate 25, the inclined rod 24 and the hollow tube 20, a "V"-shaped adjustment structure is formed between the low-voltage coil shell 15 and the insulating shell 16, and between the insulating shell 16 and the high-voltage coil shell 17. When the dry-type transformer generates a lateral vibration force on the high-voltage coil shell 17, the insulating shell 16 or the low-voltage coil shell 15 during operation, the vibration force is transmitted to the inclined plate through the arc plate 25, and the inclined rod 24 generates a rotational tendency to push the adjustment plate 22 toward the direction close to the fixed plate 19. During the movement of the adjustment plate 22, the spring 23 is squeezed, thereby converting the lateral vibration force into a longitudinal force, and the longitudinal force is buffered and absorbed by the spring 23 and the rubber pad 21, thereby avoiding the lateral movement of the low-voltage coil shell 15, the insulating shell 16 or the high-voltage coil shell 17, which is beneficial to maintaining the relative position and distance between the three and between the stacked iron core 3, thereby ensuring the normal operation of the dry-type transformer.

[0043] See also Figure 7 、 Figure 8 and Figure 9, an embodiment of the present invention provides: an anti-vibration fixing device for an ultra-large capacity dry-type transformer, comprising a limit block 33 installed through the outer wall of a hollow rod 18, a connecting block 34 installed on the top and bottom of the limit block 33, an adjusting piece 22 symmetrically arranged about the fixing piece 19, the limit blocks 33 are respectively located above the upper set of adjusting pieces 22 and below the lower set of adjusting pieces 22, a spring 35 is embedded in the inner wall of the hollow rod 18, and one end of the spring 35 is fixedly connected to the outer wall of the connecting block 34, and the connecting block 34 is embedded in the inner wall of the hollow tube 20, a mounting groove 26 is provided inside the lower pad 14, a shaft is fixedly provided on the bottom wall of the mounting groove 26, and a worm gear 27 is sleeved on the outer wall of the shaft, and the worm gear 2 A square frame 28 is installed on the top of 7, and a square rod 29 is inserted into the inner wall of the square frame 28. The top of the square rod 29 is connected to a screw rod 30. The square rod 29 and the screw rod 30 are both located inside the hollow rod 18. The outer wall of the square rod 29 is fixedly sleeved with a support ring, and the support ring is embedded in the inner wall of the hollow tube 20. The outer wall of the screw rod 30 is sleeved with a trapezoidal platform 31, which is located between two sets of symmetrically arranged limit blocks 33, and the outer wall of the trapezoidal platform 31 is in contact with the outer wall of the limit block 33. A limit plate 32 is installed on the outer wall of the trapezoidal platform 31, and the limit plate 32 is embedded in the inner wall of the hollow rod 18. The limit plate 32 is located below the limit block 33. A worm 36 is installed through the outer wall of the lower pad 14, and the worm 36 is engaged with the worm gear 27.

[0044] Furthermore, when installing the low-voltage coil shell 15, the insulating shell 16 and the high-voltage coil shell 17, the low-voltage coil shell 15 is installed first, and then the hollow rod 18 is installed on the outside of the low-voltage coil shell 15, and the square rod 29 is passed through the top of the lower pad 14 and the bottom end of the square rod 29 is embedded in the square frame 28. At this time, the limit blocks 33 are respectively located above the upper set of adjustment rings and below the lower set of adjustment rings. The adjustment rings are blocked by the limit blocks 33, and then the insulating rings are installed on the outside of the low-voltage coil shell 15. Then, the worm 36 is rotated, and the worm 36 drives the worm gear 27 to rotate, and then drives the square rod 29 and the screw rod 30 at the top of the worm gear 27 to rotate, so that the trapezoidal platform 31 drives the limit plate 32 to slide upward along the inner wall of the hollow rod 18, and the extrusion between the trapezoidal platform 31 and the limit block 33 gradually decreases. Under the push of the spring three 35, The limit block 33 is made to slide toward the inside of the hollow rod 18 and no longer blocks the adjusting ring. The adjusting ring is pushed by the spring 23 to move in the direction away from the fixing plate 19, so that the inclined rod 24 drives the arc plate 25 to move, and the inner wall of the arc plate 25 is respectively fitted with the outer wall of the low-voltage coil shell 15 and the outer wall of the insulating shell 16, thereby completing the relative fixation of the low-voltage coil shell 15 and the insulating shell 16. Thereafter, the hollow rod 18 is installed on the outside of the insulating shell 16, and the high-voltage coil shell 17 is installed on the outside of the hollow rod 18. The corresponding worm gear 36 is rotated again to complete the relative fixation of the high-voltage coil shell 17 and the insulating shell 16. The regulating piece 22 is limited by setting the limit block 33, thereby realizing the position restriction of the arc plate 25, facilitating the installation of the low-voltage coil shell 15, the insulating shell 16 and the high-voltage coil shell 17, which is beneficial to improving the assembly efficiency of the dry-type transformer.

[0045] See also Figure 10 The present invention provides an embodiment of an anti-vibration fixing device for an ultra-large capacity dry-type transformer, comprising a gear ring 40 embedded in the outer wall of a lower pad 14, the gear ring 40 being located on the outside of a worm 36, and the teeth of the gear ring 40 being arranged toward the worm 36, a torsion frame 37 being installed at the right end of the worm 36, the torsion frame 37 being arranged to facilitate the rotation of the worm 36, a telescopic rod 38 being installed on the back side of the torsion frame 37, and the torsion frame 37 being arranged to provide installation space for the worm 36, a toothed block 39 being installed at the output end of the telescopic rod 38, the toothed block 39 being engaged with the gear ring 40;

[0046] When the position adjustment of the trapezoidal platform 31 is completed, the telescopic rod 38 is started to extend, and the telescopic rod 38 pushes the toothed block 39 to move in the direction close to the lower pad 14, so that the toothed block 39 is engaged with the gear ring 40, and then the position of the telescopic rod 38 and the torsion frame 37 is fixed, thereby fixing the worm 36, and preventing the worm 36 from rotating due to the existence of operating vibration during the operation of the dry-type transformer, thereby preventing the worm gear 27 from driving the square rod 29 and the lead screw 30 to rotate, causing the position of the trapezoidal platform 31 to change and resulting in the position of the limit block 33 being not fixed, affecting the movement of the adjustment piece 22, ensuring the normal use of the arc plate 25, the inclined rod 24 and the adjustment piece 22, and improving the position fixing effect of the low-voltage coil shell 15, the insulating shell 16 and the high-voltage coil shell 17.

[0047] See also Figure 1 The present invention provides an embodiment: an anti-vibration fixing device for an ultra-large capacity dry-type transformer, comprising a base 41 installed at the bottom of a lower clamp 1, the base 41 provides support for the lower clamp 1, and a fan 42 is installed on the top of the base 41, and the fans 42 are respectively located on the front and rear sides of two groups of lower clamps 1, and the fans 42 are used to dissipate heat for the dry-type transformer.

[0048] Working principle: An anti-vibration fixing device for an ultra-large capacity dry-type transformer, which clamps the middle stacked iron core 3 from the front and rear sides of the top and bottom respectively by setting an upper clamp 2 and a lower clamp 1, and clamps the stacked iron core 3 by setting a front pull plate 4 and a rear pull plate 13. When the stacked iron sheets shrink and deform after thermal expansion, the stacked iron sheets are clamped to avoid gaps between the iron cores. The front baffle, the rear pull plate 13 and the stacked iron sheets are then fixed by a binding belt 9 and a flexible rack 10, and the area enclosed by the binding belt 9 can be adjusted to avoid the binding belt 9 from sliding. By setting a variable "V"-shaped structure between the low-voltage coil shell 15 and the insulating shell 16, and between the insulating shell 16 and the high-voltage coil shell 17, the lateral vibration force generated during the vibration process is converted into a longitudinal vibration force, and the longitudinal vibration force is absorbed and buffered, thereby avoiding the lateral movement of the low-voltage coil shell 15, the insulating shell 16 or the high-voltage coil shell 17, which is beneficial to maintaining the relative position and distance between the three and the stacked iron core 3, ensuring the normal operation of the dry-type transformer.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An anti-vibration fixing device for an ultra-large capacity dry-type transformer, characterized in that: The invention comprises a lower clamping member (1), wherein the number of installation groups of the lower clamping members (1) is two, a stacked iron core (3) is provided between the two groups of the lower clamping members (1), a front pull plate (4) is fixedly installed on the top of the front group of lower clamping members (1), an upper clamping member (2) is installed on the top of the front pull plate (4), and a rear pull plate (13) is slidably connected to the top of the rear pull plate (13), and the upper clamping member (2) is slidably connected to the top of the rear pull plate (13); The front pull plate (4) and the rear pull plate (13) are both provided with a groove (5) on one side facing the stacked iron core (3); a spring (6) and a pressure sensor (7) are installed on the inner wall of the groove (5); and the pressure sensor (7) is located between two adjacent groups of springs (6); an extrusion plate (8) is connected to one end of the spring (6) facing the stacked iron sheet; the outer sides of the front pull plate (4), the rear pull plate (13) and the stacked iron sheet are wrapped with a binding belt (9); a flexible rack (10) is installed on the outer wall of the binding belt (9); a servo motor (11) is installed on the inner wall of the upper clamp (2); an output end of the servo motor (11) is connected to a mounting shaft; a gear (12) is sleeved on the outer wall of the mounting shaft, and the gear (12) is meshed with the flexible rack (10); A lower pad (14) is installed on the top of the lower clamp (1), and the lower pad (14) is located on the front side of the front pull plate (4) or the rear side of the rear pull plate (13). A low-voltage coil shell (15), an insulating shell (16) and a high-voltage coil shell (17) are installed on the top of the lower gasket in sequence from the inside to the outside, and the low-voltage coil shell (15), the insulating shell (16) and the high-voltage coil shell (17) are coaxially arranged. A hollow rod (18) is installed on the top of the lower pad (14), and the hollow rod (18) is located between the low-voltage coil shell (15) and the insulating shell (16), and between the insulating shell (16) and the high-voltage coil shell (17). A fixing plate (19) is installed on the outer wall of the hollow rod (18), and a hollow tube (20) is installed on the outer wall of the fixing plate (19). The fixing plate (19) is fixedly connected to the hollow rod (18) and the hollow tube (20) respectively. 19) are both provided with rubber pads (21), the outer wall of the hollow rod (18) is provided with an adjusting piece (22), the adjusting piece (22) is slidably connected to the outer wall of the hollow rod (18), a spring 2 (23) is provided between the adjusting piece (22) and the rubber pad (21), the side of the adjusting piece (22) away from the fixed piece (19) is hinged with an inclined rod (24), and the end of the inclined rod (24) away from the adjusting piece (22) is hinged with an arc plate (25); The inner wall of the arc plate (25) is respectively fitted with the outer wall of the low-voltage coil shell (15) and the inner wall of the insulating shell (16), and the outer wall of the insulating shell (16) is fitted with the inner wall of the high-voltage coil shell (17).

2. The anti-vibration fixing device for an ultra-large capacity dry-type transformer according to claim 1, characterized in that: One end of the binding belt (9) is fixedly embedded in the outer wall of the rear pull plate (13), and the other end of the binding belt (9) overlaps with the fixed end of the binding belt (9).

3. The anti-vibration fixing device for an ultra-large capacity dry-type transformer according to claim 1, characterized in that: The outer wall of the hollow rod (18) is penetrated by a limit block (33), the top and bottom of the limit block (33) are both installed with a connecting block (34), the inner wall of the hollow rod (18) is embedded with a spring three (35), and one end of the spring three (35) is fixedly connected to the outer wall of the connecting block (34), the interior of the lower pad (14) is provided with a mounting groove (26), the bottom wall of the mounting groove (26) is fixedly provided with a shaft, the outer wall of the shaft is provided with a worm gear (27), and the top of the worm gear (27) is provided with a square frame (2 8), a square rod (29) is inserted into the inner wall of the square frame (28), a screw rod (30) is connected to the top of the square rod (29), a trapezoidal platform (31) is provided on the outer wall of the screw rod (30), the trapezoidal platform (31) is located between two sets of symmetrically arranged limit blocks (33), a limit plate (32) is installed on the outer wall of the trapezoidal platform (31), and the limit plate (32) is embedded in the inner wall of the hollow rod (18), and a worm (36) is installed through the outer wall of the lower pad (14), and the worm (36) is engaged with the worm wheel (27).

4. The anti-vibration fixing device for an ultra-large capacity dry-type transformer according to claim 3, characterized in that: The adjusting pieces (22) are symmetrically arranged with respect to the fixing piece (19) in the upper and lower directions, and the limiting blocks (33) are respectively located above the upper set of adjusting pieces (22) and below the lower set of adjusting pieces (22).

5. The anti-vibration fixing device for an ultra-large capacity dry-type transformer according to claim 3, characterized in that: A toothed ring (40) is embedded in the outer wall of the lower pad (14), and the toothed ring (40) is located outside the worm (36). A torsion frame (37) is installed at the right end of the worm (36), and a telescopic rod (38) is installed on the back of the torsion frame (37). A toothed block (39) is installed at the output end of the telescopic rod (38), and the toothed block (39) is engaged with the toothed ring (40).

6. The anti-vibration fixing device for an ultra-large capacity dry-type transformer according to claim 1, characterized in that: A base (41) is installed at the bottom of the lower clamp (1).

7. The anti-vibration fixing device for an ultra-large capacity dry-type transformer according to claim 6, characterized in that: A fan (42) is installed on the top of the base (41), and the fan (42) is respectively located on the front and rear sides of the two groups of lower clamps (1).

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