Dry-type transformer clamp structure beneficial to ventilation

Abstract

The dry-type transformer clamp structure comprises a lower clamp, an upper clamp, a winding and a cooling fan, the lower clamp comprises a first web plate, a first bottom plate and a first top plate, the first top plate is composed of inclined plates arranged at intervals, the upper surfaces of the inclined plates correspond to the bottom surfaces of epoxy resin cushion blocks in shape, and the upper surfaces of the inclined plates correspond to the bottom surfaces of the epoxy resin cushion blocks in shape. Reinforcing ribs are installed on the lower surface of the inclined plate and arranged on the inner side of the upper clamping piece at intervals. The first top plate of the lower clamping piece is arranged to be the inclined plates arranged at intervals, on one hand, the upper surfaces of the inclined plates are matched with the epoxy resin cushion blocks, and therefore the winding can be well supported; on the other hand, the air outlet area of the top plate of the lower clamping piece can be greatly increased, so that air cooling can achieve an airflow heat dissipation effect on the inner side and the outer side of the winding, the temperature of the winding can be reduced in all directions, and the ideal heat dissipation effect is achieved; the reinforcing ribs are installed on the lower surface of the inclined plate, the inclined plate is supported, and the supporting strength of the top plate of the lower clamping piece can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a dry-type transformer clamping structure which is beneficial to ventilation. Background Art

[0002] Dry-type transformers, which are dry-type transformers whose cores and windings are not immersed in insulating oil, are widely used in places like local lighting, high-rise buildings, airports, and CNC machinery equipment at ports. Dry-type transformers typically have multiple cooling fans connected to their base. When the temperature of the dry-type transformer rises to a certain level, the cooling fans begin to force airflow through the coils to dissipate heat.

[0003] The lower clamp of a dry-type transformer is generally made of channel steel or bent steel plate. The cooling fan is installed on the side of the lower clamp. When the cooling fan is running, the lower clamp blocks the airflow. Forced air cooling cannot effectively dissipate heat from the interphase windings and the AC phase sides, resulting in higher temperatures in this area. To improve the heat dissipation effect of the windings, the existing technology uses air inlets on the top wall of the lower clamp to prevent the lower clamp from blocking the airflow. For example, Chinese patent publication No. CN 215069544 U discloses a dry-type transformer lower clamp that facilitates ventilation and heat dissipation. The lower clamp has a second heat dissipation hole on the upper end surface, through which airflow can enter the windings, so that forced air cooling can achieve the effect of airflow dissipation for the interphase windings and the AC phase sides. However, due to the strength of the top wall of the lower clamp, the size of the heat dissipation hole is relatively limited, which in turn affects the improvement of the heat dissipation effect. Utility Model Content

[0004] The purpose of the utility model is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a dry-type transformer clamp structure that is conducive to ventilation.

[0005] A dry-type transformer clamp structure that is conducive to ventilation, includes a lower clamp, an upper clamp, a winding and a heat dissipation fan, the upper and lower ends of the winding are respectively connected to the upper clamp and the lower clamp by epoxy resin pads, the upper clamp includes a second bottom plate, the second bottom plate is provided with an air outlet, the lower clamp includes a first web, a first bottom plate and a first top plate, the first bottom plate is mounted on the support channel steel by bolts, the support channel steel is also mounted with a support plate by bolts, the support plate is mounted with a heat dissipation fan, the first top plate is composed of inclined plates arranged at intervals, the inclined plates are mirror-symmetrical to each other, the upper surface of the inclined plate corresponds to the bottom surface shape of the epoxy resin pad, the lower surface of the inclined plate is installed with reinforcing ribs, and the reinforcing ribs are arranged at intervals on the inner side of the upper clamp.

[0006] A further solution is that the number of the inclined plates is six, the inclined plates are arranged in groups of two to form an isosceles trapezoid, and the inclined plates are arranged in groups of two to correspond to one winding.

[0007] A further solution is that there are two lower clamps, which are fixedly connected to each other via screws, and there are two upper clamps, which are fixedly connected to each other via screws.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a dry-type transformer clamp structure that is conducive to ventilation. By setting the first top plate of the lower clamp as an inclined plate arranged at intervals, on the one hand, the upper surface of the inclined plate is adapted to the epoxy resin pad, so that the winding can be well supported; on the other hand, the air outlet area of ​​the top plate of the lower clamp can be greatly improved, so that the air cooling can have the effect of airflow heat dissipation on both the inside and outside of the winding, which is beneficial to all-round reduction of the winding temperature and has an ideal heat dissipation effect; and reinforcing ribs are installed on the lower surface of the inclined plate to support the inclined plate, thereby ensuring the supporting strength of the top plate of the lower clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 This is a schematic diagram of the main structure of a dry-type transformer clamp structure that is conducive to ventilation provided by an embodiment of the utility model;

[0011] Figure 2 This is a schematic diagram of the main structure of the lower clamp provided by an embodiment of the utility model;

[0012] Figure 3 This is a schematic diagram of the top view of the lower clamp provided by an embodiment of the utility model;

[0013] Figure 4 This is a schematic diagram of the main structure of the upper clamp provided by an embodiment of the utility model;

[0014] Figure 5 This is a bottom view of the structure of the lower clamp provided by an embodiment of the utility model.

[0015] Figure numerals: lower clamp 1, epoxy resin pad 2, winding 3, upper clamp 4, heat dissipation fan 5, support plate 6, support channel steel 7, first web 101, first bottom plate 102, first top plate 103, reinforcement rib 104, second web 401, second bottom plate 402, second top plate 403, air outlet 404. DETAILED DESCRIPTION

[0016] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] See also Figure 1-Figure 5 The utility model discloses a dry-type transformer clamp structure that is conducive to ventilation, including a lower clamp 1, an upper clamp 4, a winding 3 and a heat dissipation fan 5. The upper and lower ends of the winding 3 are respectively connected to the upper clamp 4 and the lower clamp 1 through an epoxy resin pad 2. In this embodiment, there are two lower clamps 1, and screw holes are provided on the lower clamp 1. The two lower clamps 1 are relatively arranged and fixed together by screws, so that the upper clamp 4 can stably support the winding 3 through the epoxy resin pad 2; there are also two upper clamps 4, and screw holes are also provided on the upper clamp 4. The two upper clamps 4 are relatively arranged and fixed together by screws. Pull plate holes for installing pull plates are also relatively provided on the upper clamp 4 and the lower clamp 1.

[0019] The cross-sections of the lower clamp 1 and the upper clamp 4 are C-shaped. The lower clamp 1 includes a first web 101, a first bottom plate 102 and a first top plate 103. The first bottom plate 102 is mounted on the support channel steel 7 by bolts, and the number of support channel steels 7 is two. The support channel steel 7 is also mounted with a support plate 6 by bolts, and a heat dissipation fan 5 is mounted on the support plate 6. The first top plate 103 is composed of inclined plates arranged at intervals, and adjacent inclined plates are mirror-symmetrical to each other. The upper surface of the inclined plate corresponds to the bottom shape of the epoxy resin pad 2, and the lower surface of the inclined plate is mounted with reinforcing ribs 104. The reinforcing ribs 104 are arranged at intervals on the inner side of the upper clamp 4, and the reinforcing ribs 104 correspond one-to-one to the inclined plates. It is understood that the upper surface of the inclined plate is adapted to the epoxy resin pad 2, thereby effectively supporting the winding 2. Moreover, the space between the inclined plates can be used for the airflow of the cooling fan 5, thereby greatly increasing the air outlet area of ​​the lower clamp 1. This allows air cooling to dissipate heat from both the inside and outside of the winding, which helps to reduce the temperature of the winding in all directions and achieve ideal heat dissipation. Reinforcing ribs 104 are installed on the lower surface of the inclined plate to support the inclined plate, thereby ensuring the supporting strength of the lower clamp 1. The upper clamp 4 includes a second bottom plate 402, which is provided with air outlet holes 404.

[0020] There are six inclined plates, which are arranged in groups of two to form an isosceles trapezoid, and each group of two inclined plates corresponds to one winding 3 .

[0021] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A dry-type transformer clamp structure that facilitates ventilation, comprising a lower clamp (1), an upper clamp (4), a winding (3) and a heat dissipation fan (5), characterized in that: The upper and lower ends of the winding (3) are connected to the upper clamp (4) and the lower clamp (1) respectively through the epoxy resin pad (2), the upper clamp (4) includes a second bottom plate (402), and the second bottom plate (402) is provided with an air outlet (404), the lower clamp (1) includes a first web (101), a first bottom plate (102) and a first top plate (103), the first bottom plate (102) is mounted on the support channel steel (7) by bolts, the support channel steel (7) is also mounted with a support plate (6) by bolts, and a heat dissipation fan (5) is mounted on the support plate (6), the first top plate (103) is composed of spaced inclined plates, the inclined plates are mirror-symmetrical to each other, the upper surface of the inclined plate corresponds to the bottom surface shape of the epoxy resin pad (2), and the lower surface of the inclined plate is provided with reinforcing ribs (104), and the reinforcing ribs (104) are spaced inside the upper clamp (4).

2. A dry-type transformer clamp structure that facilitates ventilation according to claim 1, characterized in that: The number of the inclined plates is six, and the inclined plates are arranged in groups of two to form an isosceles trapezoid, and the inclined plates are arranged in groups of two to correspond to one winding (3).

3. The dry-type transformer clamp structure that facilitates ventilation according to claim 1, characterized in that: The number of the lower clamping members (1) is two, and the two lower clamping members (1) are fixedly connected to each other via screws. The number of the upper clamping members (4) is also two, and the two upper clamping members (4) are fixed to each other via screws.

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