A dry type transformer

Abstract

The present invention discloses a dry-type transformer, including an iron core, wherein the iron core includes a plurality of core columns and an iron yoke fixedly connected to the core columns, each of the core columns is sleeved with an inner winding and an outer winding, the iron yoke is clamped and fixed by a mounting frame, and each core column is also provided with a first limiting plate, a second limiting plate, a third limiting plate, and a fourth limiting plate arranged in a ring shape around the periphery of the core column, wherein the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate are fixedly connected to the mounting frame and the top heights are successively reduced. In the process of the inner winding and the outer winding moving downward and being sleeved and installed on the outer side of the core column, they will be successively limited by the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate. The beneficial effect of the present invention is that during the installation process, the inner winding and the outer winding only need to be adjusted horizontally when they are close to the limiting plate, and at the same time, the adjustment does not need to rely on the proficiency of the operator, which is more convenient and efficient.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a dry-type transformer. Background Art

[0002] A dry-type transformer is a power transformer that is not immersed in insulating oil as a whole, but is cooled by air convection or forced air cooling. It has the advantages of simple structure, easy maintenance, fire safety, energy saving and environmental protection. Therefore, it has been widely used in some occasions with high environmental safety requirements, such as large buildings, hospitals, and factories.

[0003] The existing dry-type transformer mainly includes an iron core and a winding sleeved on the outside of the iron core. When installing the winding, the bottom of the iron core needs to be fixed first, and then the winding is suspended in the air by a lifting mechanism. After aligning the iron core, it is moved from top to bottom until it is released from the pad provided at the bottom of the iron core, and the installation of the winding is completed.

[0004] In actual production, due to the gap between the winding and the core, the winding can be mounted on the core in multiple different positions. However, there is a standard installation range within which the winding must be located so as not to affect the subsequent installation of other components. In order to be as close to the standard installation range as possible, the operator is required to make horizontal adjustments to the position of the winding in real time as the winding moves downward. However, the following problems arise: (1) In order to facilitate the operator to make real-time adjustments to the position of the winding, the speed at which the winding moves downward must be significantly slowed down, reducing the production efficiency of the dry-type transformer; (2) The accuracy of the final position of the winding depends on the operator's proficiency and experience, which in turn increases the difficulty of producing the dry-type transformer. Summary of the invention

[0005] In the production and assembly process of existing dry-type transformers, in order not to affect the subsequent installation of other components, it is necessary to adjust the position of the winding in real time during its downward movement. This results in the need to move the winding downward at a relatively slow speed, which reduces production efficiency, and on the other hand requires the operator to have a high level of proficiency, which increases the difficulty of production. In order to solve the above problems, the following invention is proposed:

[0006] A dry-type transformer comprises an iron core, wherein the iron core comprises a plurality of core columns and two iron yokes, each of the core columns is sleeved with an inner winding, an outer winding is sleeved on the outer side of the inner winding, an annular cavity is formed between the outer winding and the inner winding, the two iron yokes are fixedly connected to all the core columns from the upper side and the lower side at the same time, each iron yoke is provided with a mounting frame for clamping and fixing it, and a first limiting plate, a second limiting plate, a third limiting plate, and a fourth limiting plate arranged in a ring are also provided on the periphery of each core column, the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate are fixedly connected to the mounting frame and the top heights decrease sequentially.

[0007] In the process of the inner winding moving downward and being installed on the outside of the core column, the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate limit the inner winding from the outside in turn to ensure the inner winding. In the process of the outer winding moving downward and being installed on the outside of the inner winding, the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate limit the outer winding from the inside in turn. After the inner and outer windings are installed, the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate are all inserted into the annular cavity in cooperation. The limiting plates are pre-set here, and once the inner winding or the outer winding is limited by them at the same time, it will enter the standard installation range.

[0008] Furthermore, four lower pads arranged in a ring are provided on the periphery of each core column, the lower pads are attached to the bottom of the inner winding and the outer winding and are fixedly connected to the mounting frame located at the lower side, and the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate are respectively fixedly connected to a lower pad.

[0009] Furthermore, a partition inserted into the installation cavity is provided on the top of the lower pad, a slot is provided on the partition, and the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate are each provided with an insert plate that cooperates and is inserted into the slot.

[0010] Furthermore, the first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate are also provided with fixing arms located on both sides of the lower pad, and the fixing arms are fixedly connected to the lower pad via fixing rods. After removing the fixing rods, the limiting plate can be moved out of the annular cavity.

[0011] Furthermore, a first connecting arm is provided on one side of the first limiting plate, a first matching block is provided on the first connecting arm, and a second connecting arm is provided on one side of the second limiting plate, a first matching groove is provided on the second connecting arm for the first matching block to be movably inserted into. The first limiting plate and the second limiting plate are combined to improve the stability of both.

[0012] Furthermore, a third connecting arm is provided on one side of the third limiting plate, a second matching block is provided on the third connecting arm, a fourth connecting arm is provided on one side of the fourth limiting plate, a second matching groove is provided on the fourth connecting arm for the second matching block to be movably inserted into. The third limiting plate and the fourth limiting plate are combined to improve the stability of both.

[0013] Furthermore, a threaded hole is provided on the top of the first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate. After a threaded rod is threaded into the threaded hole, the limiting plate can be removed by lifting the threaded rod upward.

[0014] Furthermore, four upper pads arranged in a ring are provided on the periphery of each core column, and the upper pads are attached to the tops of the inner winding and the outer winding and are fixedly connected to the mounting frame located on the upper side.

[0015] Furthermore, the mounting frame is provided with a plurality of mounting plates arranged in a ring shape around the core column, and the mounting plates are fixedly connected to the upper pad and the lower pad.

[0016] The present invention proposes a dry-type transformer, which is provided with a first limiting plate, a second limiting plate, a third limiting plate and a fourth limiting plate with successively decreasing heights around the core column. During the process of the inner winding and the outer winding being downwardly sleeved on the core column, they will be limited by the first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate in sequence, and finally be positioned and installed on the lower pad. The beneficial effect is that the operator only needs to adjust the position of the winding when the winding is close to the limiting plate, and the adjustment process does not require high operating proficiency, so that the installation of the winding is more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the dry-type transformer in the present invention;

[0018] Figure 2 The internal structure of the dry-type transformer in the present invention is shown in FIG. Figure 1 ;

[0019] Figure 3 The internal structure of the dry-type transformer in the present invention is shown in FIG. Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the combined structure of the limit plate and the lower pad in the present invention;

[0021] Figure 5 It is a schematic diagram of the combined structure of the fourth limiting plate and the lower pad in the present invention.

[0022] The corresponding relationship between the various figure labels and component names in the figure is as follows:

[0023] 1. Iron core; 2. Lower pad; 3. First limit plate; 4. Second limit plate; 5. Third limit plate; 6. Fourth limit plate; 7. Upper pad; 11. Mounting frame; 12. Mounting plate; 13. Inner winding; 14. Outer winding; 15. Annular cavity; 16. Core column; 17. Iron yoke; 21. Partition; 22. Slot; 31. First connecting arm; 32. First matching block; 33. Insert plate; 34. Fixed arm; 35. Fixed rod; 36. Threaded hole; 41. Second connecting arm; 42. First matching groove; 51. Third connecting arm; 52. Second matching block; 61. Fourth connecting arm; 62. Second matching groove. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0025] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of this application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] In addition to being used to indicate a position or location relationship, some of the above terms may also be used to indicate other meanings. For example, the term "on" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1-Figure 3As shown, it is a preferred embodiment of the present invention, a dry-type transformer, including an iron core 1 and a mounting frame 11, the iron core 1 includes three vertically arranged core columns 16 and two horizontally arranged iron yokes 17, the two iron yokes 17 are fixedly connected to all the core columns 16 from the upper side and the lower side respectively, so as to realize the integrated connection of the core columns 16 with each other, and a mounting frame 11 is clamped and fixed on each iron yoke 17, the outer side of each core column 16 is provided with an inner winding 13, the outer side of the inner winding 13 is provided with an outer winding 14, and an annular cavity 15 is formed between the inner winding 13 and the outer winding 14.

[0030] like Figure 3 and Figure 4 As shown, for each core column 16, a plurality of mounting plates 12 arranged in a ring shape with the core column 16 as the center are provided on the mounting frames 11 located on the upper and lower sides. In the present embodiment, four mounting plates 12 are provided on the upper and lower sides respectively, wherein an upper pad 7 is fixedly provided on the mounting plate 12 located on the upper side, and a lower pad 2 is fixedly provided on the mounting plate 12 located on the lower side. The upper pad 7 is attached to the top of the inner winding 13 and the outer winding 14, and the lower pad 2 is attached to the bottom of the inner winding 13 and the outer winding 14.

[0031] The following takes the core column 16 located in the middle as an example. Unless otherwise specified, the components arranged on the other core columns 16 are the same. Four lower pads 2 and four upper pads 7 arranged in a ring shape with the middle core column 16 as the center are respectively provided at the bottom and top. The first limit plate 3, the second limit plate 4, the third limit plate 5 and the fourth limit plate 6 are fixed on the four lower pads 2 in sequence. Affected by the lower pads 2, the first limit plate 3, the second limit plate 4, the third limit plate 5 and the fourth limit plate 6 are also arranged in a ring shape with the middle core column 16 as the center, and the heights of the tops of the first limit plate 3, the second limit plate 4, the third limit plate 5 and the fourth limit plate 6 decrease in sequence.

[0032] In the actual production process, the following steps need to be performed before the inner winding 13 and the outer winding 14 are installed: (1) Assemble the lower iron yoke 17 and clamp it with the mounting frame 11; (2) Fix the core column 16 on the lower iron yoke 17; (3) Fix the lower pad 2 and the limit plate on the mounting frame 11.

[0033] When installing the inner winding 13, it is necessary to first lift the inner winding 13 upwards, and then move it downward to the initial position that can be sleeved on the outside of the core column 16. In the process of the inner winding 13 moving downward and approaching the first limit plate 3, if the operator finds that the inner winding 13 is not located on the inner side of the first limit plate 3, it is necessary to stop the inner winding 13 from moving downward and adjust the horizontal position of the inner winding 13 until it is completely located on the inner side of the first limit plate 3, where the inner side refers to the side of the limit plate facing the core column 16. After that, the inner winding 13 continues to move downward and approaches the second limit plate 4, the third limit plate 5, and the fourth limit plate 6 in turn. The operator needs to ensure that the inner winding 13 is always located on the inner side of the limit plate, otherwise the inner winding 13 needs to be adjusted horizontally. Finally, the inner winding 13 is positioned by four limit plates and installed on the lower pad 2.

[0034] When installing the outer winding 14, the steps are the same as those for installing the inner winding 13, the only difference being that the operator needs to sequentially ensure that the outer winding 14 is on the outside of the four limit plates, where the outside refers to the side of the limit plate away from the core column 16. Finally, the outer winding 14 is also positioned by the four limit plates and installed on the lower pad 2. After the outer winding 14 and the inner winding 13 are installed, the limit plates are inserted into the annular cavity 15, and then the upper iron yoke 17 and the mounting frame 11 are installed. The present invention assists in positioning the inner winding 13 and the outer winding 14 through limit plates of different heights, and only needs to adjust the winding horizontally when close to the limit plates, and there is no need to rely on the operator's experience during the horizontal adjustment process, making the installation of the inner winding 13 and the outer winding 14 more efficient and convenient.

[0035] like Figure 5 As shown, a partition plate 21 inserted into the installation cavity is provided on the top of the lower pad 2, and a slot 22 is provided on the partition plate 21. The first limiting plate 3, the second limiting plate 4, the third limiting plate 5, and the fourth limiting plate 6 are each provided with a plug plate 33 that cooperates to be inserted into the slot 22. Furthermore, the first limiting plate 3, the second limiting plate 4, the third limiting plate 5, and the fourth limiting plate 6 are also provided with fixed arms 34 located on both sides of the lower pad 2, and the fixed arms 34 are fixedly connected to the lower pad 2 through a fixing rod 35. A threaded hole 36 is provided on the top of the first limiting plate 3, the second limiting plate 4, the third limiting plate 5, and the fourth limiting plate 6. When the inner winding 13 and the outer winding 14 are installed and the limit plate needs to be removed, first prepare a threaded rod with one end matched with the threaded hole 36. After all the fixing rods 35 are removed, one end of the threaded rod is threaded into the threaded hole 36 and the other end is passed through the annular cavity 15. The operator can move the threaded rod upward to remove the limit plate from the annular cavity 15.

[0036] In this embodiment, a first connecting arm 31 is provided on one side of the first limiting plate 3, and a first matching block 32 is provided on the first connecting arm 31; a second connecting arm 41 is provided on one side of the second limiting plate 4, and a first matching groove 42 for the first matching block 32 to be inserted movably is provided on the second connecting arm 41; a third connecting arm 51 is provided on one side of the third limiting plate 5, and a second matching block 52 is provided on the third connecting arm 51; a fourth connecting arm 61 is provided on one side of the fourth limiting plate 6, and a second matching groove 62 for the second matching block 52 to be inserted movably is provided on the fourth connecting arm 61. The limiting plates are divided into two groups, and each group cooperates with each other, which improves the overall stability of the limiting plates. When removing the limiting plates, the first limiting plate 3 and the third limiting plate 5 need to be removed first.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A dry-type transformer, comprising an iron core (1), the iron core (1) comprising a plurality of core columns (16) and two iron yokes (17), each of the core columns (16) being sleeved with an inner winding (13), an outer winding (14) being sleeved outside the inner winding (13), an annular cavity (15) being formed between the outer winding (14) and the inner winding (13), the two iron yokes (17) being fixedly connected to all the core columns (16) from the upper side and the lower side respectively, each of the iron yokes (17) being provided with a mounting frame (11) for clamping and fixing the yoke, characterized in that: A first limiting plate (3), a second limiting plate (4), a third limiting plate (5), and a fourth limiting plate (6) are arranged in an annular shape on the periphery of each core column (16); the first limiting plate (3), the second limiting plate (4), the third limiting plate (5), and the fourth limiting plate (6) are fixedly connected to the mounting frame (11) and the top heights are successively reduced; during the process of the inner winding (13) and the outer winding (14) being sleeved and mounted on the outer side of the core column (16), they are successively limited by the first limiting plate (3), the second limiting plate (4), the third limiting plate (5), and the fourth limiting plate (6); when the inner winding (13) and the outer winding (14) are installed, all the limiting plates are inserted into the annular cavity (15) in a coordinated manner.

2. The dry-type transformer according to claim 1, characterized in that: Four lower pads (2) arranged in a ring shape are provided around each core column (16); the lower pads (2) are fitted to the bottoms of the inner winding (13) and the outer winding (14) and are fixedly connected to the mounting frame (11) located at the lower side; the first limiting plate (3), the second limiting plate (4), the third limiting plate (5), and the fourth limiting plate (6) are respectively fixedly connected to one lower pad (2).

3. The dry-type transformer according to claim 2, characterized in that: A partition plate (21) inserted into the installation cavity is provided on the top of the lower pad (2), a slot (22) is provided on the partition plate (21), and an insert plate (33) inserted into the slot (22) is provided on each of the first limiting plate (3), the second limiting plate (4), the third limiting plate (5), and the fourth limiting plate (6).

4. The dry-type transformer according to claim 3, characterized in that: The first limit plate (3), the second limit plate (4), the third limit plate (5) and the fourth limit plate (6) are also provided with fixed arms (34) located on both sides of the lower pad (2), and the fixed arms (34) are fixedly connected thereto via fixed rods (35).

5. The dry-type transformer according to claim 4, characterized in that: A first connecting arm (31) is provided on one side of the first limiting plate (3), and a first matching block (32) is provided on the first connecting arm (31). A second connecting arm (41) is provided on one side of the second limiting plate (4), and a first matching groove (42) is provided on the second connecting arm (41) for the first matching block (32) to be movably inserted.

6. The dry-type transformer according to claim 5, characterized in that: A third connecting arm (51) is provided on one side of the third limiting plate (5), and a second matching block (52) is provided on the third connecting arm (51). A fourth connecting arm (61) is provided on one side of the fourth limiting plate (6), and a second matching groove (62) is provided on the fourth connecting arm (61) for the second matching block (52) to be movably inserted.

7. The dry-type transformer according to claim 6, characterized in that: A threaded hole (36) is provided on the top of each of the first limiting plate (3), the second limiting plate (4), the third limiting plate (5) and the fourth limiting plate (6).

8. The dry-type transformer according to claim 2, characterized in that: Four upper pads (7) arranged in a ring shape are provided on the periphery of each core column (16); the upper pads (7) are fitted to the tops of the inner winding (13) and the outer winding (14) and are fixedly connected to the mounting frame (11) located on the upper side.

9. The dry-type transformer according to claim 8, characterized in that: The mounting frame (11) is also provided with a plurality of mounting plates (12) arranged in a ring shape around the core column (16), and the mounting plates (12) are fixedly connected to the upper cushion block (7) and the lower cushion block (2).

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