Transformer body fastening structure of transformer

Abstract

The utility model provides a body fastening structure of a transformer, which relates to the technical field of transformers, the body fastening structure fixes the transformer in an oil tank, the transformer comprises an upper iron yoke, a coil and a lower iron yoke which are sequentially arranged from top to bottom, and the body fastening structure at least comprises an upper clamping piece group and a lower clamping piece group, the upper clamping piece set comprises two upper clamping pieces and two fixing supporting plates, the two upper clamping pieces are arranged on the high-voltage side and the low-voltage side of the upper iron yoke respectively, the two fixing supporting plates are arranged at the two ends of the upper clamping piece set respectively, the two ends of each fixing supporting plate are fixedly connected with the two upper clamping pieces respectively, and each fixing supporting plate is detachably and fixedly connected with the tank wall of the oil tank. The lower clamping piece set is clamped on a lower iron yoke of the transformer and comprises two lower clamping pieces, the two lower clamping pieces are arranged on the high-voltage side and the low-voltage side of the lower iron yoke respectively, each lower clamping piece is provided with a positioning assembly, and the positioning assemblies are detachably connected with the bottom of the oil tank. The transformer body fastening structure can effectively improve the performance stability of the transformer.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, especially a kind of body fastening structure of transformer. BACKGROUND

[0002] At present, the requirement of power grid to distribution transformer's sudden short-circuit resistance is higher.The body fastening structure of existing transformer uses clamp and laminated wood to limit coil up and down and left and right, the body fastening structure of existing transformer is relatively simple, worker is convenient to operate, production efficiency is greatly improved, but when transformer is subjected to external force or external circuit short-circuit, transformer core and coil are easily deformed under stress, causing the performance of transformer to be poor and service life to be shortened.The body fastening structure of existing transformer mainly limits and fixes coil, but generally does not fasten upper yoke of core, to facilitate later maintenance.When transformer operating condition is abnormal, the gap of upper yoke is too large, no-load loss, no-load current, noise and other conditions will be larger, and in serious case, upper yoke will be deformed under stress and fall off, reducing the service life of transformer.

[0003] In addition, when the working condition of the existing transformer body fastening structure is abnormal, the coil and the core are easily deformed under stress, resulting in poor no-load, load, noise and other conditions of the transformer, which does not meet the performance requirements and shortens the service life, and the economy is poor.

[0004] Therefore, the present inventors, based on years of production and design experience in this field and related fields, have designed a transformer body fastening structure through repeated testing, in order to solve the problems existing in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a body fastening structure of transformer, which can effectively improve the performance stability of transformer.

[0006] To achieve the above-mentioned purpose, the utility model provides a body fastening structure of transformer, which fixes the transformer in the oil tank, the transformer includes upper yoke, coil and lower yoke arranged in order from top to bottom, wherein the body fastening structure at least includes:

[0007] The upper clamp set is clamped to the upper yoke, and the upper clamp set includes two upper clamps and two fixed support plates, the two upper clamps are arranged on the high-voltage side and the low-voltage side of the upper yoke respectively, the two fixed support plates are arranged at the two ends of the upper clamp set respectively, the two ends of each fixed support plate are fixedly connected with the two upper clamps respectively, and each fixed support plate is detachably fixedly connected with the tank wall of the oil tank;

[0008] A lower clamp set is clamped to a lower yoke of the transformer, and the lower clamp set comprises two lower clamps respectively arranged at a high-voltage side and a low-voltage side of the lower yoke, and each of the lower clamps is provided with at least one positioning assembly which is detachably connected to a tank bottom of the oil tank.

[0009] The transformer body fastening structure as described above, wherein at least one first bolt penetrates through the fixing support plate and the tank wall of the oil tank and fixedly connects the fixing support plate and the tank wall together.

[0010] The transformer body fastening structure as described above, wherein both ends of the fixing support plate are respectively bent to form a bent portion towards the upper yoke, and at least one second bolt penetrates through the bent portion and the upper clamp and fixedly connects the bent portion and the upper clamp together.

[0011] The transformer body fastening structure as described above, wherein a first positioning plate is arranged between the fixing support plate and the tank wall, and a second positioning plate is arranged between the bent portion and the upper clamp.

[0012] The transformer body fastening structure as described above, wherein the positioning assembly comprises a first positioning sleeve and a first positioning pin, the first positioning sleeve is fixedly arranged on the tank bottom, the first positioning sleeve is provided with a first positioning cavity with an upward opening, and the first positioning pin is fixedly arranged on the lower clamp and is arranged in the first positioning cavity in a position.

[0013] The transformer body fastening structure as described above, wherein a damping positioning ring is arranged between the first positioning sleeve and the first positioning pin.

[0014] The transformer body fastening structure as described above, wherein the positioning assembly comprises a second positioning sleeve and a second positioning pin, the second positioning sleeve is fixedly arranged on the tank bottom, the second positioning sleeve is provided with a second positioning cavity with an upward opening, and the second positioning pin is fixedly arranged on the lower clamp, and the second positioning sleeve is arranged outside the second positioning pin in a position.

[0015] The transformer body fastening structure as described above, wherein a damping positioning ring is arranged between the second positioning sleeve and the second positioning pin.

[0016] The transformer body fastening structure as described above, wherein the upper clamp set further comprises a plurality of upper pull belts, the plurality of upper pull belts are respectively arranged above and below the upper yoke, and both ends of each of the upper pull belts are connected to the two upper clamps and clamp the upper yoke through the two upper clamps.

[0017] The lower clamp group further comprises a plurality of lower pull belts, the plurality of lower pull belts are respectively arranged above and below the lower iron yoke, and two ends of each of the lower pull belts are connected with the two lower clamps and clamp the lower iron yoke through the two lower clamps.

[0018] The transformer body fastening structure as described above, wherein the end of the upper pull belt is connected with the upper clamp through a first U-shaped bolt, and the end of the lower pull belt is connected with the lower clamp through a second U-shaped bolt.

[0019] Compared with the prior art, the transformer body fastening structure has the following characteristics and advantages:

[0020] The transformer body fastening structure disclosed by the utility model, through the fixed supporting plate, the upper clamp group is fixed on the tank wall of the oil tank, through the positioning assembly, the lower clamp group is fixed on the tank bottom of the oil tank, so that the upper clamp group and the lower clamp group are positioned with the oil tank, when the transformer is affected by external force or abnormal working condition during transportation or hoisting, the transformer body fastening structure can avoid the movement or collision of the transformer in the oil tank, thereby avoiding the stress deformation of each component of the transformer, ensuring the no-load performance and noise condition of the transformer, and effectively enhancing the sudden short-circuit resistance of the transformer. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are only for illustrative purposes, and are not intended to limit the scope of the utility model disclosure in any way. In addition, the shape and scale of each component in the drawings are only schematic, which is used to help understand the utility model, and is not a specific limitation on the shape and scale of each component of the utility model. Those skilled in the art can select various possible shapes and scales according to specific conditions to implement the utility model under the guidance of the utility model.

[0022] Figure 1 It is a side view of the transformer in the utility model;

[0023] Figure 2 It is a front view of the transformer in the utility model;

[0024] Figure 3 It is a top view of the transformer in the utility model;

[0025] Figure 4 It is a schematic view of the first U-shaped screw rod in the utility model;

[0026] Figure 5 It is a schematic view of the fixed supporting plate in the utility model;

[0027] Figure 6 It is a schematic view of the first positioning sleeve in the utility model;

[0028] Figure 7It is the structure schematic view of first positioning sleeve in the utility model.

[0029] Figure 8 It is the structure schematic view of damping positioning ring in the utility model.

[0030] Mark explanation

[0031] 100, body fastening device; 10, upper clamp group;

[0032] 11, upper clamp; 111, obliquely arranged mounting plate;

[0033] 112, fastening nut; 12, fixed support plate;

[0034] 13, first positioning plate; 14, second positioning plate;

[0035] 15, upper pull belt; 16, first U-shaped screw;

[0036] 17, upper cushion block; 20, lower clamp group;

[0037] 21, lower clamp; 22, positioning assembly;

[0038] 221, first positioning sleeve; 222, first positioning nail;

[0039] 223, damping positioning ring; 23, lower pull belt;

[0040] 24, second U-shaped screw; 25, lower cushion block;

[0041] 26, foot pad; 27, foot pad cushion block;

[0042] 28, shock-absorbing pad; 200, transformer;

[0043] 210, upper iron yoke; 220, lower iron yoke;

[0044] 230, coil; 300, oil tank. Specific embodiments

[0045] The details of the utility model can be more clearly understood in conjunction with the description of the specific embodiments of the utility model and the accompanying drawings. However, the specific embodiments of the utility model described herein are only used to explain the purpose of the utility model, and cannot be understood as a limitation on the utility model in any way. Under the guidance of the utility model, the skilled person can conceive any possible deformation based on the utility model, which should be regarded as belonging to the scope of the utility model.

[0046] Unless the direction indicated by the single definition, the directions such as up, down, left, right and the like involved in this paper are with the direction shown by the utility model. Figure 1The up, down, left, right and other directions in the description are used for reference.

[0047] As shown in Figures 1 to 8 The utility model provides a body fastening structure 100 of transformer, fixes transformer 200 in oil tank 300, and transformer 200 includes the upper yoke 210, coil 230 and lower yoke 220 arranged in sequence from top to bottom, and the body fastening structure 100 at least includes upper clamp piece group 10 and lower clamp piece group 20, and upper clamp piece group 10 is clamped to the upper yoke 210 of transformer 200, and upper clamp piece group 10 includes two upper clamp pieces 11 and two fixed branch plates 12, and two upper clamp pieces 11 are arranged at the high voltage side and low voltage side of upper yoke 210 respectively, and two fixed branch plates 12 are arranged at both ends of upper clamp piece group 10 respectively, and both ends of each fixed branch plate 12 are fixedly connected with two upper clamp pieces 11 respectively, and each fixed branch plate 12 is detachably fixedly connected with the tank wall of oil tank 300, and lower clamp piece group 20 is clamped to the lower yoke 220 of transformer 200, and lower clamp piece group 20 includes two lower clamp pieces 21, and two lower clamp pieces 21 are arranged at the high voltage side and low voltage side of lower yoke 220 respectively, and each lower clamp piece 21 has at least one positioning assembly 22, and the positioning assembly 22 is detachably connected with the tank bottom of oil tank 300.

[0048] The body fastening structure 100 of transformer of the utility model fixes upper clamp piece group 10 on the tank wall of oil tank 300 through fixed branch plate 12, fixes lower clamp piece group 20 on the tank bottom of oil tank 300 through positioning assembly 22, so that upper clamp piece group 10 and lower clamp piece group 20 can be positioned with oil tank 300 respectively, when transformer 200 is subjected to external force or abnormal working condition in the transportation or hoisting, the body fastening structure 100 can avoid the shaking or collision of transformer 200 in oil tank 300, effectively avoids the stress deformation of each component of transformer 200, guarantees the no-load performance and noise condition of transformer 200, and effectively strengthens the anti-sudden short-circuit capability of transformer 200.

[0049] In an alternative embodiment of the utility model, at least one first bolt penetrates the fixed branch plate 12 and the tank wall of oil tank 300 and fixedly connects the fixed branch plate 12 and the tank wall of oil tank 300 together, thereby avoiding the shaking of the upper part of transformer 200.

[0050] In an alternative example of the embodiment, the two ends of fixed branch plate 12 are respectively bent towards the upper yoke 210 to form a bent portion 121, the outer side of bent portion 121 is fitted with the inner side of upper clamp piece, and at least one second bolt penetrates the bent portion 121 and the upper clamp piece 11 and fixes the bent portion 121 and the upper clamp piece 11 together.

[0051] In an optional example, a first positioning plate 13 is arranged between the fixed supporting plate 12 and the tank wall of the oil tank 300, and a second positioning plate 14 is arranged between the bending part 121 and the upper clamping piece 11.

[0052] Further, the first positioning plate 13 is welded on the tank wall of the oil tank 300, and the second positioning plate 14 is welded on the upper clamping piece 11.

[0053] In an optional example, a first threaded through hole for mounting a first bolt is arranged on the fixed supporting plate 12, the first positioning plate 13 and the tank wall of the oil tank 300; and a second threaded hole for mounting a second bolt is arranged on the bending part 121, the second positioning plate 14 and the upper clamping piece 11, respectively.

[0054] In an optional embodiment of the utility model, the positioning assembly 22 comprises a first positioning sleeve 221 and a first positioning pin 222, the first positioning sleeve 221 is fixedly arranged on the tank bottom of the oil tank 300, and the first positioning sleeve 221 has a first positioning cavity with an upward opening, the first positioning pin 222 is fixedly arranged on the lower clamping piece 21, and the first positioning pin 222 is arranged in the first positioning cavity.

[0055] In an optional example of the embodiment, a damping positioning ring 223 is nested between the first positioning sleeve 221 and the first positioning pin 222 to avoid the shaking of the transformer 200 and achieve the effect of damping and noise reduction.

[0056] In an optional example, the first positioning sleeve 221 is a seamless steel pipe and is welded on the tank bottom of the oil tank 300.

[0057] In an optional example of the embodiment, each lower clamping piece 21 has two positioning assemblies 22 arranged at intervals, and the first positioning sleeve 221 of each positioning assembly 22 is welded on the tank bottom of the oil tank 300.

[0058] In another optional embodiment of the utility model, the positioning assembly 22 comprises a second positioning sleeve and a second positioning pin, the second positioning sleeve is fixedly arranged on the tank bottom of the oil tank 300, and the second positioning sleeve has a second positioning cavity with an upward opening, the second positioning pin is fixedly arranged on the lower clamping piece 21, and the second positioning sleeve is arranged on the outside of the second positioning pin.

[0059] In an optional example, a damping positioning ring is nested between the second positioning sleeve and the second positioning pin to avoid the shaking of the body of the transformer 200 and achieve the effect of damping and noise reduction.

[0060] In an optional embodiment of the utility model, the upper clamp group 10 further comprises a plurality of upper pull belts 15, the plurality of upper pull belts 15 are located above and below the upper yoke 210 respectively, both ends of each upper pull belt 15 are connected with the two upper clamps 11 and clamp the upper yoke 210 through the two upper clamps 11, the lower clamp group 20 further comprises a plurality of lower pull belts 23, the plurality of lower pull belts 23 are located above and below the lower yoke 220 respectively, both ends of each lower pull belt 23 are connected with the two lower clamps 21 and clamp the lower yoke 220 through the two lower clamps 21. The two upper clamps 11 and the upper yoke 210 are fastened together through the upper pull belt 15, the two lower clamps 21 and the lower yoke 220 are fastened together through the lower pull belt 23, the possibility of stress deformation of the upper yoke 210 and the lower yoke 220 under any working condition is reduced, the stress deformation of the coil and the core (the upper yoke 210 and the lower yoke 220) of the transformer 200 during transportation, hoisting and abnormal working condition is effectively avoided, the ability of the transformer 200 to resist sudden short circuit is enhanced, the performance stability of the transformer 200 is improved, and it is more economical.

[0061] In an optional example of the embodiment, the end of the upper pull belt 15 is connected with the upper clamp 11 through the first U-shaped screw 16, and the end of the lower pull belt 23 is connected with the lower clamp 21 through the second U-shaped screw 24.

[0062] In an optional example, the first U-shaped screw 16 is provided with external threads at both ends, the upper clamp 11 is provided with an inclined mounting plate 111 for mounting the first U-shaped screw 16, and both ends of the first U-shaped screw 16 penetrate through the inclined mounting plate 111 and a first fastening nut 112 and are threadedly connected with the first fastening nut 112. With the above structure, the first U-shaped screw 16 fixed on the inclined mounting plate 111 is also inclined, so that the tensioning arc of the upper pull belt 15 connected with the first U-shaped screw 16 is closer to the upper yoke 210. The connection mode of the second U-shaped screw 24 and the lower clamp 21 is similar to that of the first U-shaped screw 16, which will not be described here.

[0063] In an optional example, the width of the upper pull belt 15 matches the size of the first U-shaped screw 16, and the width of the lower pull belt 23 matches the size of the second U-shaped screw 24.

[0064] In an optional example, the size of the first U-shaped screw 16 and the second U-shaped screw 24 can be adjusted according to the capacity of the transformer 200, thereby changing the width of the upper pull belt 15 and the width of the lower pull belt 23, and thereby improving the uneven stress condition.

[0065] In an optional example, two upper pull belts 15 are arranged at intervals above the upper yoke 210, and two upper pull belts 15 are arranged at intervals below the upper yoke 210.

[0066] In an optional embodiment of the utility model, the upper clamp piece group 10 further includes upper cushion block 17, the upper cushion block 17 is padded between upper iron yoke 210 and coil 230, and the first flow guide groove is formed in the side of upper cushion block 17 facing coil 230;The lower clamp piece group 20 further includes lower cushion block 25, and the second flow guide groove is formed in the side of lower cushion block 25 facing coil 230. The first flow guide groove and the second flow guide groove correspond to the oil channel position in coil 230 respectively, so as to ensure that the flow of transformer oil in oil tank 300 is more smooth, and the circulating flow of transformer oil can reduce the temperature rise of transformer.

[0067] In an optional example of the utility model, the lower clamp piece group 20 further includes cushion foot, and the cushion foot 26 is padded between lower iron yoke 220 and the tank bottom of oil tank 300.

[0068] In an optional example, the cushion foot 26 and lower iron yoke 220 are provided with cushion foot cushion block 27, and the side of cushion foot cushion block 27 contacting lower iron yoke 220 is in a stepped shape and is matched with the stepped surface of lower iron yoke 220, so as to increase the buffering and protection effect of cushion foot cushion block 27 on lower iron yoke 220.

[0069] In an optional example, the cushion foot 26 and the tank bottom of oil tank 300 are provided with damping pad 28, further increasing the buffering and protection effect of cushion foot 26 on lower iron yoke 220.

[0070] For the detailed explanation of each embodiment, the purpose is only to explain the utility model, so as to better understand the utility model, but these descriptions cannot be explained as the limitation of the utility model for any reason, especially, the various features described in different embodiments can be combined arbitrarily, so as to constitute other embodiments, except for the explicit opposite description, these features should be understood as being applicable to any one embodiment, and not limited to the described embodiment.

Claims

1. A transformer body fastening structure for fixing a transformer in an oil tank, the transformer comprising an upper yoke, a coil and a lower yoke which are arranged in order from the top, characterized in that, The body fastening structure at least comprises: An upper clamp set clamped to the upper yoke, the upper clamp set comprising two upper clamps and two fixed support plates, the two upper clamps being respectively arranged on the high-voltage side and the low-voltage side of the upper yoke, and the two fixed support plates being respectively arranged at the two ends of the upper clamp set, the two ends of each fixed support plate being fixedly connected with the two upper clamps, and each fixed support plate being detachably fixedly connected with the tank wall of the oil tank; A lower clamp set clamped to the lower yoke of the transformer, the lower clamp set comprising two lower clamps, the two lower clamps being respectively arranged on the high-voltage side and the low-voltage side of the lower yoke, and each lower clamp having at least one positioning assembly, the positioning assembly being detachably connected with the tank bottom of the oil tank.

2. The transformer body fastening structure according to claim 1, wherein At least one first bolt penetrates the fixed support plate and the tank wall of the oil tank and fixedly connects the fixed support plate and the tank wall together.

3. The transformer body fastening structure according to claim 2, wherein The two ends of the fixed support plate are respectively bent towards the upper yoke to form a bent portion, and at least one second bolt penetrates the bent portion and the upper clamp and fixedly connects the bent portion and the upper clamp together.

4. The transformer core fastening structure according to Claim 3, wherein A first positioning plate is arranged between the fixed support plate and the tank wall, and a second positioning plate is arranged between the bent portion and the upper clamp.

5. The transformer body fastening structure according to Claim 1, wherein The positioning assembly comprises a first positioning sleeve and a first positioning pin, the first positioning sleeve being fixedly arranged on the tank bottom, the first positioning sleeve having a first positioning cavity with an upward opening, and the first positioning pin being fixedly arranged on the lower clamp, the first positioning pin being arranged in the first positioning cavity in a position.

6. The transformer body fastening structure according to claim 5, wherein A damping positioning ring is nested between the first positioning sleeve and the first positioning pin.

7. The transformer body fastening structure as claimed in claim 1, wherein The positioning assembly comprises a second positioning sleeve and a second positioning pin, the second positioning sleeve being fixedly arranged on the tank bottom, the second positioning sleeve having a second positioning cavity with an upward opening, and the second positioning pin being fixedly arranged on the lower clamp, the second positioning sleeve being arranged on the second positioning pin in a position.

8. The transformer body fastening structure as claimed in claim 7, wherein A damping positioning ring is nested between the second positioning sleeve and the second positioning pin.

9. The transformer body fastening structure as claimed in claim 1, wherein The upper clamp set further comprises a plurality of upper pull belts, the plurality of upper pull belts being respectively arranged above and below the upper yoke, the two ends of each upper pull belt being connected with the two upper clamps and clamping the upper yoke through the two upper clamps; The lower clamp set further comprises a plurality of lower pull belts, the plurality of lower pull belts being respectively arranged above and below the lower yoke, the two ends of each lower pull belt being connected with the two lower clamps and clamping the lower yoke through the two lower clamps.

10. The transformer body fastening structure as claimed in claim 9, wherein The end of the upper pull belt is connected with the upper clamp through a first U-shaped bolt, and the end of the lower pull belt is connected with the lower clamp through a second U-shaped bolt.

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