Dry-type transformer coil structure

Abstract

The utility model relates to the technical field of transformers, in particular to a dry-type transformer coil structure. Comprising an iron core, a low-voltage coil, a high-voltage coil, a first insulating shell, a second insulating shell, a third insulating shell, a fourth insulating shell, a first spray head, a second spray head, a third spray head and a fourth spray head, the iron core, the low-voltage coil, the first insulating shell, the second insulating shell, the third insulating shell, the high-voltage coil and the fourth insulating shell are sequentially arranged from inside to outside; the first spray head and the second spray head are installed on the second insulation shell and the third insulation shell, and the third spray head and the fourth spray head are installed on the inner side of the first insulation shell and the inner side of the fourth insulation shell respectively. According to the utility model, the inner and outer walls of the low-voltage coil and the high-voltage coil can be uniformly cooled, the cooling effect is better, and the cooling cavity can be cleaned in the cooling process, so that the continuous heat absorption effect of the second insulating shell and the third insulating shell is ensured.

Description

Technical Field

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

[0002] A split-type transformer is a multi-winding power transformer consisting of one high-voltage winding and two or more low-voltage windings of equal voltage and capacity per phase. Split dry-type transformers, on the other hand, rely on air convection for natural cooling or the addition of fans for cooling. They are commonly used for small-capacity transformers in high-rise buildings, highway toll booths, local lighting, and electronic circuits. The coil, a key component of a split dry-type transformer, typically refers to a ring-shaped winding of wire.

[0003] The Chinese patent with announcement number CN219512932U discloses a coil structure for splitting a dry-type transformer. The utility model includes an iron core, an inner insulating shell, a low-voltage coil, a ventilation pipe and a cleaning assembly. The iron core is a conductor, the inner insulating shell is sleeved on the outside of the iron core, the low-voltage coil is wound on the outside of the inner insulating shell, the ventilation pipe is sleeved on the outside of the low-voltage coil, and the cleaning assembly includes a vertical rod passing through the ventilation pipe, brush wires arranged at the front and rear ends of the vertical rod, a handle arranged at the top of the vertical rod and a block arranged at the bottom end of the vertical rod.

[0004] The above-mentioned disclosed patent still has the following technical defects: it can only achieve water cooling of the outside of the high-voltage coil, so that the high-voltage coil cannot be cooled evenly. Secondly, the curved air duct needs to be cleaned manually, which is a cumbersome operation. Utility Model Content

[0005] The purpose of the utility model is to address the problems existing in the background technology and to propose a dry-type transformer coil structure.

[0006] The technical solution of the utility model is a dry-type transformer coil structure, comprising:

[0007] An iron core, a low-voltage coil, a high-voltage coil, a first insulating shell, a second insulating shell, a third insulating shell, and a fourth insulating shell, wherein the iron core, the low-voltage coil, the first insulating shell, the second insulating shell, the third insulating shell, the high-voltage coil, and the fourth insulating shell are arranged in sequence from the inside to the outside, a cooling cavity is formed between the second insulating shell and the third insulating shell, the first insulating shell and the fourth insulating shell are both hollow structures, and the bottom ends of the first insulating shell and the fourth insulating shell are both open;

[0008] A first nozzle, a second nozzle, a third nozzle and a fourth nozzle, wherein the first nozzle and the second nozzle are both mounted on the second insulating shell and the third insulating shell, and the third nozzle and the fourth nozzle are respectively mounted on the inner sides of the first insulating shell and the fourth insulating shell;

[0009] The base is arranged at the bottom end of the fourth insulating shell, a plurality of water holes are opened on the base, and a plurality of supports are arranged at the bottom end of the base.

[0010] Preferably, an air intake mechanism is also included, which includes two first annular plates and two second annular plates. The two first annular plates are arranged side by side up and down, and the first annular plate at the bottom is fixed to the upper end of the third insulating shell. A plurality of support rods are connected between the two first annular plates, and the two second annular plates are respectively fixed to the outer periphery of the two first annular plates, and the two second annular plates are symmetrically arranged.

[0011] Preferably, an annular air inlet channel is formed between the two second annular plates, and the opening size of the annular air inlet channel gradually expands from the inside to the outside.

[0012] Preferably, the top end of the second insulating shell is located above the upper first annular plate.

[0013] Preferably, the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are all provided with a number of fine holes, the fine holes on the first nozzle are facing the second insulating shell, the fine holes on the second nozzle are facing the third insulating shell, the first nozzle and the second nozzle are staggered, and the fine holes on the third nozzle and the fourth nozzle are both facing the bottom position.

[0014] Preferably, a bottom shell is provided at the bottom end of the base, a return pipe is connected to the bottom shell, and a filter is installed on the inner side of the bottom shell.

[0015] Preferably, a water storage chamber is installed on the fourth insulating shell, a water inlet pipe is connected to the water storage chamber, and connecting pipes are connected between the water storage chamber and the first nozzle, the second nozzle, the third nozzle and the fourth nozzle.

[0016] Preferably, a plurality of connecting columns are fixedly connected between the second insulating shell and the third insulating shell.

[0017] Compared with the existing technology, the utility model has the following beneficial technical effects: the utility model can achieve uniform cooling of the inner and outer walls of the low-voltage coil and the high-voltage coil, with a good cooling effect. During the cooling process, the cooling cavity can be cleaned to ensure the continuous heat absorption effect of the second insulating shell and the third insulating shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 and Figure 3 All of them are explosion diagrams of the present utility model.

[0020] Figure numerals: 1, iron core; 2, low-voltage coil; 3, high-voltage coil; 4, first insulating shell; 51, second insulating shell; 52, third insulating shell; 6, fourth insulating shell; 7, water storage chamber; 8, base; 801, water flow hole; 9, support; 10, bottom shell; 11, water inlet pipe; 12, return pipe; 13, connecting pipe; 14, first annular plate; 15, second annular plate; 16, connecting column; 171, first nozzle; 172, second nozzle. DETAILED DESCRIPTION

[0021] Example 1

[0022] like Figure 1-Figure 3 As shown, a dry-type transformer coil structure proposed in this embodiment includes an iron core 1, a low-voltage coil 2, a high-voltage coil 3, a first insulating shell 4, a second insulating shell 51, a third insulating shell 52, a fourth insulating shell 6, a first nozzle 171, a second nozzle 172, a third nozzle, a fourth nozzle and a base 8.

[0023] The iron core 1, the low-voltage coil 2, the first insulating shell 4, the second insulating shell 51, the third insulating shell 52, the high-voltage coil 3 and the fourth insulating shell 6 are arranged in sequence from the inside to the outside. A cooling cavity is formed between the second insulating shell 51 and the third insulating shell 52. A plurality of connecting columns 16 are fixedly connected between the second insulating shell 51 and the third insulating shell 52. The second insulating shell 51 and the third insulating shell 52 are connected by the connecting columns 16. This can improve the stability of the connection between the second insulating shell 51 and the third insulating shell 52. The first insulating shell 4 and the fourth insulating shell 6 are both hollow structures, and the bottom ends of the first insulating shell 4 and the fourth insulating shell 6 are both open.

[0024] The base 8 is provided at the bottom end of the fourth insulating shell 6 . A plurality of water holes 801 are provided on the base 8 . A plurality of supports 9 are provided at the bottom end of the base 8 .

[0025] The first nozzle 171 and the second nozzle 172 are both installed on the second insulating shell 51 and the third insulating shell 52, and the third nozzle and the fourth nozzle are respectively installed on the inner sides of the first insulating shell 4 and the fourth insulating shell 6; the first nozzle 171, the second nozzle 172, the third nozzle and the fourth nozzle are all provided with a number of fine holes, the fine holes on the first nozzle 171 are facing the second insulating shell 51, the fine holes on the second nozzle 172 are facing the third insulating shell 52, the first nozzle 171 and the second nozzle 172 are staggered, and the fine holes on the third nozzle and the fourth nozzle are both facing the bottom position; a water storage chamber 7 is installed on the fourth insulating shell 6, and a water inlet pipe 11 is connected to the water storage chamber 7, and a connecting pipe 13 is connected between the water storage chamber 7 and the first nozzle 171, the second nozzle 172, the third nozzle and the fourth nozzle.

[0026] In this embodiment, one end of the water inlet pipe 11 is connected to the water source, and water enters the first nozzle 171, the second nozzle 172, the third nozzle and the fourth nozzle through the water storage chamber 7. The first insulating shell 4 and the second insulating shell 51 can realize the heat absorption work on the inside and outside of the low-voltage coil 2, and the third insulating shell 52 and the fourth insulating shell 6 can realize the heat absorption work on the inside and outside of the high-voltage coil 3. The first nozzle 171 and the second nozzle 172 set can realize the cooling work of the second insulating shell 51 and the third insulating shell 52. At the same time, the flushed water flows to the bottom end through the cooling cavity. When the water flows, it can flush the dust and dirt on the inner wall of the cooling cavity to ensure the continuous heat absorption effect of the second insulating shell 51 and the third insulating shell 52. The third nozzle and the fourth nozzle are respectively sprayed into the inner cavity of the first insulating shell 4 and the fourth insulating shell 6, thereby realizing the cooling of the first insulating shell 4 and the fourth insulating shell 6.

[0027] Example 2

[0028] like Figure 1 and Figure 2 As shown, a dry-type transformer coil structure proposed in this embodiment, compared with Example 1, this embodiment also includes an air intake mechanism, which includes two first annular plates 14 and two second annular plates 15. The two first annular plates 14 are arranged side by side, and the first annular plate 14 at the bottom is fixed to the upper end of the third insulating shell 52. A plurality of support rods are connected between the two first annular plates 14. The two second annular plates 15 are respectively fixed to the outer periphery of the two first annular plates 14, and the two second annular plates 15 are symmetrically arranged; an annular air inlet channel is formed between the two second annular plates 15, and the opening size of the annular air inlet channel gradually expands from the inside to the outside; through the arrangement of the above structure, the side wind can smoothly enter the cooling cavity, and the natural air cooling of the second insulating shell 51 and the third insulating shell 52 can be realized, and the air intake area is increased; the top of the second insulating shell 51 is located above the upper first annular plate 14, and the second insulating shell 51 blocks the wind to prevent the wind from blowing directly to the inside of the transformer coil, so that a larger amount of air can enter the cooling cavity.

[0029] Example 3

[0030] like Figure 1 As shown, a dry-type transformer coil structure proposed in this embodiment, compared with Example 1, in this embodiment, a bottom shell 10 is provided at the bottom end of the base 8, a return pipe 12 is connected to the bottom shell 10, and a filter (not shown) is installed on the inner side of the bottom shell 10. The installed filter can filter impurities in the water, and the filtered water flows into the bottom end of the bottom shell 10 and finally flows back through the return pipe 12 to realize the recycling of water resources.

[0031] 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 scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A dry-type transformer coil structure, characterized in that: include: An iron core (1), a low-voltage coil (2), a high-voltage coil (3), a first insulating shell (4), a second insulating shell (51), a third insulating shell (52), and a fourth insulating shell (6), wherein the iron core (1), the low-voltage coil (2), the first insulating shell (4), the second insulating shell (51), the third insulating shell (52), the high-voltage coil (3), and the fourth insulating shell (6) are arranged in sequence from the inside to the outside, a cooling cavity is formed between the second insulating shell (51) and the third insulating shell (52), the first insulating shell (4) and the fourth insulating shell (6) are both hollow structures, and the bottom ends of the first insulating shell (4) and the fourth insulating shell (6) are both open; a first nozzle (171), a second nozzle (172), a third nozzle, and a fourth nozzle, wherein the first nozzle (171) and the second nozzle (172) are both mounted on the second insulating housing (51) and the third insulating housing (52), and the third nozzle and the fourth nozzle are respectively mounted on the inner sides of the first insulating housing (4) and the fourth insulating housing (6); The base (8) is arranged at the bottom end of the fourth insulating shell (6), a plurality of water holes (801) are opened on the base (8), and a plurality of supports (9) are arranged at the bottom end of the base (8).

2. The dry-type transformer coil structure according to claim 1, characterized in that: The invention also includes an air intake mechanism, which includes two first annular plates (14) and two second annular plates (15). The two first annular plates (14) are arranged side by side in an upper and lower direction. The first annular plate (14) at the bottom is fixed to the upper end of the third insulating shell (52). A plurality of support rods are connected between the two first annular plates (14). The two second annular plates (15) are respectively fixed to the outer periphery of the two first annular plates (14). The two second annular plates (15) are symmetrically arranged.

3. The dry-type transformer coil structure according to claim 2, characterized in that: An annular air inlet channel is formed between the two second annular plates (15), and the opening size of the annular air inlet channel gradually expands from the inside to the outside.

4. The dry-type transformer coil structure according to claim 2, characterized in that: The top end of the second insulating shell (51) is located above the upper first annular plate (14).

5. The dry-type transformer coil structure according to claim 1, characterized in that: The first nozzle (171), the second nozzle (172), the third nozzle and the fourth nozzle are all provided with a plurality of fine holes. The fine holes on the first nozzle (171) face the second insulating shell (51), and the fine holes on the second nozzle (172) face the third insulating shell (52). The first nozzle (171) and the second nozzle (172) are staggered, and the fine holes on the third nozzle and the fourth nozzle are both oriented toward the bottom.

6. The dry-type transformer coil structure according to claim 1, characterized in that: A bottom shell (10) is provided at the bottom end of the base (8), a return pipe (12) is connected to the bottom shell (10), and a filter is installed on the inner side of the bottom shell (10).

7. The dry-type transformer coil structure according to claim 1, characterized in that: A water storage chamber (7) is installed on the fourth insulating shell (6), a water inlet pipe (11) is connected to the water storage chamber (7), and connecting pipes (13) are connected between the water storage chamber (7) and the first nozzle (171), the second nozzle (172), the third nozzle, and the fourth nozzle.

8. The dry-type transformer coil structure according to claim 1, characterized in that: A plurality of connecting columns (16) are fixedly connected between the second insulating shell (51) and the third insulating shell (52).

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