Transformer iron core clamp

Abstract

The utility model relates to a transformer iron core clamping piece which comprises an iron core formed by stacking a plurality of silicon steel sheets, upper clamping pieces are attached to the upper portions of the front side and the rear side of the iron core respectively, and the upper clamping pieces on the two sides longitudinally clamp an upper iron yoke of the iron core to fix the iron core. Lower clamping pieces are attached to the lower portions of the front side and the rear side of the iron core respectively, and the lower clamping pieces on the two sides longitudinally clamp an iron core lower iron yoke to fix the iron core. Upper beams are arranged on the top face of the iron core at intervals in the length direction, and the upper clamping pieces on the two sides are connected from the upper portion through the upper beams. Foot pads are arranged on the bottom face of the iron core at intervals in the length direction, and the lower clamping pieces on the two sides are connected from the bottom through the foot pads. The side beams are vertically arranged on the left side and the right side of the iron core at intervals, the two upper clamping pieces are connected through the side beams from the left side face and the right side face, the two lower clamping pieces are connected through the side beams from the left side face and the right side face, and therefore all parts of the iron core are reasonably clamped and fixed, iron core gaps are effectively prevented, and safety and reliability of normal operation of the transformer are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially a transformer core clamp spare. BACKGROUND

[0002] The transformer core is an important component of the transformer, and mainly functions as a magnetic circuit part of the transformer to realize voltage transformation through electromagnetic induction principle. Core gap is one of common faults of the transformer core, and the core gap can cause a series of problems such as magnetic flux leakage, magnetic flux reduction, loss increase, temperature rise increase, efficiency reduction, noise increase and the like, and seriously affects safe operation of the transformer, so it is particularly important to prevent the transformer core gap. In addition to the optimization design of the core itself such as selection of appropriate core material and accurate gap design, the design optimization of the core clamp is also extremely important.

[0003] The core clamp is a fastening device for clamping and fixing the transformer core, and the upper and lower yokes of the transformer are clamped on both sides to achieve the purpose of fixing and supporting the core. However, the existing core clamp often pays more attention to the effect on the whole core, and ignores the fixation of each component of the core, so it cannot prevent the core gap. SUMMARY

[0004] To solve the above problems, the application provides a transformer core clamp with reasonable structure, so that each part of the core is clamped and fixed reasonably, the core gap is effectively prevented, and the safety and reliability of normal operation of the transformer are greatly improved.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A transformer core clamp includes a core composed of a plurality of silicon steel sheets stacked, upper clamps respectively attached to the upper sides of the front and rear of the core, and the two upper clamps clamped longitudinally on the upper yoke of the core to fix the core. Lower clamps respectively attached to the lower sides of the front and rear of the core, and the two lower clamps clamped longitudinally on the lower yoke of the core to fix the core. Upper beams are arranged on the top surface of the core along the length direction, and the two upper clamps are connected from above by the upper beams. The bottom surface of the core is provided with a foot pad along the length direction, and the two lower clamps are connected from the bottom by the foot pad. Side beams are arranged on the left and right sides of the core, and the two upper clamps and the two lower clamps are connected from the left and right sides by the side beams.

[0007] As a further improvement of the above technical scheme:

[0008] A pad is arranged between the side beam and the core, between the upper beam and the core, and between the foot pad and the core, and the side of the pad facing the core is provided with a stepped structure, and the stepped structure is attached to the end face of each layer of silicon steel sheet in the core.

[0009] The side of the cushion block facing the core is arc-shaped, and a stepped structure is formed on the arc-shaped surface; a counterbore is formed on the side of the cushion block away from the arc-shaped surface, and a fastener is locked into the counterbore from the side beam or the upper beam or the cushion foot towards the counterbore of the cushion block.

[0010] The two cushion blocks are symmetrically arranged on the same longitudinal direction of the core and constitute a pair; the opposite sides of the pair of cushion blocks are arranged towards the upper clamping pieces or the lower clamping pieces on both sides.

[0011] The cushion block comprises a first cushion block, a second cushion block and a third cushion block; the first cushion block is arranged between the side beam and the side column of the core; the second cushion block is arranged at the left and right ends of the upper yoke and the left and right ends of the lower yoke of the core; and the third cushion block is arranged between the upper beam and the core and between the cushion foot and the core.

[0012] The upper clamping piece and the lower clamping piece are respectively provided with a long hole above and below the window center line of the core, and a bandage is arranged through the long hole to tighten the core.

[0013] The fourth cushion block is further included, the fourth cushion block is located on the top surface or the bottom surface of the core, the side of the fourth cushion block facing the core is provided as a stepped structure, the stepped structure is attached to the end surface of each layer of silicon steel sheets in the core, and the fourth cushion block is symmetrically arranged in pairs along the longitudinal direction of the core.

[0014] The side of the fourth cushion block away from the stepped structure is provided with a long groove; the bandage is wound upwards or downwards from the center of the core window, is arranged into the upper clamping piece and the lower clamping piece through the long hole, and is arranged around to form a circle through the long groove, so that the upper yoke and the lower yoke of the core are tightly bound and fixed.

[0015] Pulling plates are arranged on the front and rear sides of the three columns of the core, and the pulling plates are located between the core and the upper clamping piece and the lower clamping piece; insulation pieces one are arranged between the inner side surface of the upper clamping piece and the core and between the inner side surface of the lower clamping piece and the core; and insulation pieces two are arranged between the inner side surface of the pulling plate and the core.

[0016] The upper beam is provided with three upper beams corresponding to the center lines of the iron columns of the core; and the cushion foot is provided with three cushion feet corresponding to the center lines of the iron columns of the core.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model reasonably clamps and fixes each part of the core through the upper clamping piece, the lower clamping piece, the upper beam, the cushion foot and the side beam, effectively prevents the core from being separated, and greatly improves the safety and reliability of normal operation of the transformer.

[0019] The utility model further has the following advantages:

[0020] By setting up the shims, the shims fit into the iron core through the stepped structure, thereby clamping and fixing the silicon steel sheets in each layer of the iron core; and the pressure of the shims can be adjusted by adjusting the fasteners on the shims. Attached Figure Description

[0021] Figure 1 This is the front view of the present invention.

[0022] Figure 2 This is a top view of the present invention.

[0023] Figure 3 This is a cross-sectional view of the present invention (along...) Figure 2 (Central AA direction).

[0024] Figure 4 This is a cross-sectional view of the present invention (along...) Figure 2 (in the BB direction).

[0025] Figure 5 This is a side view of the present invention.

[0026] Figure 6 for Figure 5 A magnified view of a section at point C.

[0027] Figure 7 for Figure 5 A magnified view of a section at point D.

[0028] Figure 8 This is a schematic diagram of the structure of the pad block of this utility model.

[0029] Figure 9 This is a schematic diagram of the structure of the pad block 2 of this utility model.

[0030] Figure 10 This is a schematic diagram of the structure of the pad block three of this utility model.

[0031] Figure 11 This is a schematic diagram of the structure of the pad block four of this utility model.

[0032] Among them: 1. Upper clamp; 2. Upper beam; 3. Long hole; 4. Binding strap; 5. Iron core; 6. Lower clamp; 7. Pad; 8. Side beam; 9. Pad block one; 10. Pad block two; 11. Pad block three; 12. Pad block four; 13. Pull plate; 14. Insulating component one; 15. Insulating component two; 16. Corner component one; 17. Corner component two; 100. Step structure; 121. Long groove. Detailed Implementation

[0033] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2As shown, a transformer core clamping component of this embodiment includes a core 5 composed of multiple stacked silicon steel sheets. Upper clamping components 1 are respectively attached to the upper parts of the front and rear sides of the core 5, and the upper clamping components 1 on both sides are longitudinally clamped to the yoke of the core 5 to fix the core 5. Lower clamping components 6 are respectively attached to the lower parts of the front and rear sides of the core 5, and the lower clamping components 6 on both sides are longitudinally clamped to the yoke of the core 5 to fix the core 5. Upper beams 2 are arranged at intervals along the length direction on the top surface of the core 5, and the upper clamping components 1 on both sides are connected from above by the upper beams 2. Pads 7 are arranged at intervals along the length direction on the bottom surface of the core 5, and the lower clamping components 6 on both sides are connected from the bottom by the pads 7. Side beams 8 are arranged at intervals on the left and right sides of the core 5, and the two upper clamping components 1 and the two lower clamping components 6 are connected from the left and right sides.

[0035] In this embodiment, the upper clamp 1, lower clamp 6, upper beam 2, pad 7, and side beam 8 are used to reasonably clamp and fix the various parts of the iron core 5, effectively preventing the iron core 5 from separating.

[0036] In this embodiment, the two upper clamping parts 1 are connected and maintained by the upper beam 2 and the side beam 8, and the two lower clamping parts 6 are connected and maintained by the pad 7 and the side beam 8, which effectively ensures that the upper clamping parts 1 and the lower clamping parts 6 can reliably and stably clamp the iron core 5.

[0037] Pads are provided between the side beam 8 and the iron core 5, between the upper beam 2 and the iron core 5, and between the pad 7 and the iron core 5. The side of the pad facing the iron core 5 is set as a stepped structure 100, and the stepped structure 100 is in contact with the end face of each layer of silicon steel sheet in the iron core 5.

[0038] In this embodiment, by setting the pad, the pad fits into the iron core 5 through the stepped structure 100, thereby playing a clamping and fixing role on each layer of silicon steel sheets of the iron core 5, thus achieving reliable and stable fixing in the up-down and left-right directions of the iron core 5.

[0039] The side of the pad facing the iron core 5 is curved, and a stepped structure 100 is provided on the curved surface; a countersunk hole is provided on the pad facing away from the curved surface, and a fastener is installed through the side beam 8 or the upper beam 2 or the pad foot 7 towards the countersunk hole of the pad.

[0040] In this embodiment, the curved surface design allows the stepped structure 100 to better fit the circumferential shape of the iron core 5, helping to ensure the structural fit of the pad block relative to the iron core 5.

[0041] In this embodiment, the clamping adjustment of the pad relative to the iron core 5 can be achieved by adjusting the fasteners on the pad.

[0042] Two pads are symmetrically arranged at intervals along the same longitudinal direction of the iron core 5, forming a pair, so that they can effectively fit against the iron core 5 in the up, down, left and right directions respectively; the opposite sides of the pair of pads are arranged facing the upper clamps 1 or the lower clamps 6 on both sides.

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, the pads include pad 1 9, pad 2 10, and pad 3 11. Pad 1 9 is arranged between the side beam 8 and the side column of the iron core 5. Pad 2 10 is respectively attached to the left and right ends of the upper yoke of the iron core 5 and the left and right ends of the lower yoke. Pad 3 11 is arranged between the upper beam 2 and the iron core 5 and between the pad foot 7 and the iron core 5.

[0044] In this embodiment, the specific structure of pad 1 9, pad 2 10, and pad 3 11 can be set according to the actual situation, so as to satisfy that while the stepped structure 100 and the iron core 5 are circumferentially matched, they can be fastened and locked with the corresponding side beam 8, upper beam 2, or pad 7.

[0045] exist Figure 6 In the embodiment shown, the upper beam 2 located above the iron core 5 and the upper clamp 1 located on the front and rear sides of the iron core 5 are connected and fixed by a corner piece 16; the two arms of the corner piece 16 are respectively locked and fixed to the upper beam 2 and the upper clamp 1.

[0046] exist Figure 7 In the embodiment shown, the pad 7 located below the iron core 5 and the lower clamp 6 located on the front and rear sides of the iron core 5 are connected and fixed by a corner member 17; the two arms of the corner member 17 are locked and fixed to the pad 7 and the lower clamp 6 respectively.

[0047] like Figure 8 The diagram shows a structural schematic of pad 9 in one embodiment. Pad 9 is located between the side beam 8 and the iron core 5. Each level of pad 9 is completely fitted with each level of the side post of the iron core 5. The pad 9 is wedge-shaped, which also plays a good role in fastening the side post of the iron core 5 and the connection between the upper and lower iron yokes, thereby achieving all-round clamping and fixing of the side post of the iron core 5.

[0048] In this embodiment, eight pads 9 are provided, located between the side beam 8 and the side column of the iron core 5.

[0049] like Figure 9 The diagram shows a structural schematic of pad 2 10 in one embodiment. Pad 2 10 is located between the upper beam 2 and the upper yoke of the iron core 5, or between the pad foot 7 and the lower yoke of the iron core 5, close to the side beam 8. Each level of pad 2 10 is completely fitted with each level of the upper and lower yokes of the iron core 5. The pad 2 10 is wedge-shaped, which also plays a good role in fastening the side column of the iron core 5 and the connection between the upper and lower yokes, thereby achieving all-round clamping and fixing of the lateral ends of the upper and lower yokes of the iron core 5.

[0050] In this embodiment, eight pad blocks 10 are provided.

[0051] likeFigure 10 The diagram shown is a structural schematic of pad block 3 11 in one embodiment. Pad block 3 11 is located between the upper beam 2 and the upper yoke of the iron core 5, or between the pad foot 7 and the lower yoke of the iron core 5. Each level of pad block 3 11 is completely fitted with each level of the upper and lower yokes of the iron core 5, thereby achieving all-round clamping and fixing of the upper and lower yokes of the iron core 5.

[0052] In this embodiment, sixteen pad blocks 31 are provided.

[0053] The upper clamp 1 and the lower clamp 6 are respectively provided with elongated holes 3. The elongated holes 3 are located above and below the window center line of the iron core 5. The binding straps 4 are arranged through the elongated holes 3 and bind the iron core 5 tightly. Thus, the binding straps 4 further ensure the clamping and fit of the iron core 5 at the upper yoke and the lower yoke.

[0054] It also includes a pad block 4 12, which and the elongated hole 3 are located on the top or bottom surface of the iron core 5. The side of the pad block 4 12 facing the iron core 5 is set as a stepped structure 100. The stepped structure 100 is attached to the end face of each layer of silicon steel sheet in the iron core 5. The pad blocks 4 12 are arranged in pairs symmetrically along the longitudinal direction of the iron core 5.

[0055] In this embodiment, eight pad blocks 412 are provided.

[0056] like Figure 11 As shown, a long groove 121 is provided on the side of the pad block 4 12 that is away from the step structure 100; the binding strap 4 is wrapped up or down from the center of the window of the iron core 5, passes through the long hole 3 to the inside of the upper clamp 1 and the lower clamp 6, and is surrounded by the long groove 121 to form a circle, binding and fixing the upper yoke and lower yoke of the iron core 5.

[0057] In this embodiment, the pad block 4 12 is located between the two upper beams 2 above the upper yoke of the iron core 5 and between the two pad feet 7 below the lower yoke. Each level of the pad block 4 12 is completely fitted with each level of the upper and lower yokes of the iron core 5. It has a long groove 121 on its back side. The binding strap 4 passes through the long groove 121 and the long hole 3 on the clamp to wrap around the upper and lower yokes and bind and fix them.

[0058] Pull plates 13 are provided on the front and rear sides of the three columns of the iron core 5. The pull plates 13 are located between the iron core 5 and the upper clamp 1 and the lower clamp 6. An insulating component 14 is pressed between the inner side of the upper clamp 1 and the iron core 5, and between the inner side of the lower clamp 6 and the iron core 5. An insulating component 25 is pressed between the inner side of the pull plate 13 and the iron core 5.

[0059] In this embodiment, six pull plates 13 are provided, located on both sides of the longitudinal direction of the three columns of the iron core 5.

[0060] There are three upper beams 2, which are located on the center line of the iron column of the iron core 5; there are three pads 7, which are located on the center line of the iron column of the iron core 5.

[0061] In this embodiment, the strap 4 is a PET polyester strapping.

[0062] In this embodiment, pads 9, 10, 11, and 12 fit snugly against the circumference of the core 5 from the top, bottom, left, and right, respectively, so that the upper beam 2, pad 7, and side beam 8 can stably and reliably fix the core 5 from the circumference, especially for the fit and fixation of each layer of silicon steel sheets that make up the core 5. Combined with the upper clamp 1 and lower clamp 6 located on the front and rear sides of the core 5, a cuboid structure is formed on the top, bottom, left, right, front, and back of the core 5, which fits and clamps each level of silicon steel sheets of the core 5 in all directions. This effectively fixes and supports the core 5, and also provides a good clamping and fixing effect between the levels of the core 5, greatly reducing the probability of the core separating.

[0063] This utility model rationally clamps and fixes each part of the iron core, effectively preventing the iron core from separating and greatly improving the safety and reliability of the transformer's normal operation.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0065] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A transformer core clamp, comprising a core (5) composed of multiple stacked silicon steel sheets, characterized in that: The upper parts of the front and rear sides of the iron core (5) are respectively attached to the upper clamps (1), and the upper clamps (1) on both sides are longitudinally clamped to the iron core (5) to fix the iron core (5); the lower parts of the front and rear sides of the iron core (5) are respectively attached to the lower clamps (6), and the lower clamps (6) on both sides are longitudinally clamped to the iron core (5) to fix the iron core (5); the top surface of the iron core (5) is provided with upper beams (2) at intervals along the length direction, and the upper clamps (1) on both sides are connected from above by the upper beams (2); the bottom surface of the iron core (5) is provided with pads (7) at intervals along the length direction, and the lower clamps (6) on both sides are connected from the bottom by the pads (7); the left and right sides of the iron core (5) are respectively provided with side beams (8) at intervals above and below, and the two upper clamps (1) and the two lower clamps (6) are connected from the left and right sides.

2. The transformer core clamp as described in claim 1, characterized in that: Pads are provided between the side beam (8) and the iron core (5), between the upper beam (2) and the iron core (5), and between the pad (7) and the iron core (5). The side of the pad facing the iron core (5) is set as a stepped structure (100), and the stepped structure (100) is in contact with the end face of each layer of silicon steel sheet in the iron core (5).

3. A transformer core clamp as described in claim 2, characterized in that: The side of the pad facing the iron core (5) is curved, and a stepped structure (100) is provided on the curved surface; the pad facing away from the curved surface is provided with a countersunk hole, and fasteners are installed through the side beam (8), the upper beam (2), or the pad foot (7) towards the countersunk hole of the pad.

4. A transformer core clamp as described in claim 2, characterized in that: Two pads are symmetrically arranged at intervals along the same longitudinal direction of the iron core (5) to form a pair; the opposite sides of the pair of pads are arranged facing the upper clamps (1) or the lower clamps (6) on both sides.

5. A transformer core clamp as described in claim 2, characterized in that: The pads include pad one (9), pad two (10), and pad three (11). Pad one (9) is arranged between the side beam (8) and the side column of the iron core (5). Pad two (10) is respectively attached to the left and right ends of the upper yoke and the left and right ends of the lower yoke of the iron core (5). Pad three (11) is arranged between the upper beam (2) and the iron core (5) and between the pad foot (7) and the iron core (5).

6. A transformer core clamp as described in claim 1, characterized in that: The upper clamp (1) and lower clamp (6) are respectively provided with elongated holes (3). The elongated holes (3) are located above and below the window center line of the iron core (5). A binding strap (4) is provided through the elongated holes (3) to bind the iron core (5).

7. A transformer core clamp as described in claim 6, characterized in that: It also includes a pad block four (12), which and the elongated hole (3) are located on the top or bottom surface of the iron core (5). The side of the pad block four (12) facing the iron core (5) is set as a stepped structure (100). The stepped structure (100) is attached to the end face of each layer of silicon steel sheet in the iron core (5). The pad blocks four (12) are arranged in pairs symmetrically along the longitudinal direction of the iron core (5).

8. A transformer core clamp as described in claim 7, characterized in that: The pad block (12) facing away from the step structure (100) has a long groove (121) on its four sides; the binding strap (4) is wrapped up or down from the center of the window of the iron core (5), passes through the long hole (3) to the inside of the upper clamp (1) and the lower clamp (6), and is surrounded by the long groove (121) to form a circle, binding and fixing the upper yoke and lower yoke of the iron core (5).

9. A transformer core clamp as described in claim 1, characterized in that: Pull plates (13) are provided on the front and rear sides of the three columns of the iron core (5). The pull plates (13) are located between the iron core (5) and the upper clamp (1) and the lower clamp (6). An insulating component one (14) is pressed between the inner side of the upper clamp (1) and the iron core (5), and an insulating component two (15) is pressed between the inner side of the lower clamp (6) and the iron core (5).

10. A transformer core clamp as described in claim 1, characterized in that: There are three upper beams (2), and the three upper beams (2) are located on the center line of the iron column of the iron core (5); there are three pads (7), and the three pads (7) are located on the center line of the iron column of the iron core (5).

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