Dry-type transformer with good sealing structure

Abstract

The utility model discloses a dry -type transformer with good sealing structure relates to transformer related technical field, the utility model discloses an iron core subassembly, upper mounting panel, lower mounting panel and coil subassembly, and the iron core subassembly includes three vertical side -by -side arrangement and equal interval iron core post, and the central axis of three iron core posts sets up on the same plane, and the outside of each iron core post all is provided with coil subassembly, and the top and bottom of each coil subassembly all are fixed with the electricity -making pin, and the electricity -making pin of the both ends of same coil subassembly respectively with the positive pole and negative pole electric connection of coil subassembly, and the upper portion of three electricity -making pins outside of the lower portion of three electricity -making pins below are all fixed with upper mounting panel, and the lower portion of three electricity -making pins below are all fixed with lower mounting panel. The utility model discloses an iron core subassembly, upper mounting panel, lower mounting panel and coil subassembly are set up, and the problem that the iron core stability is not enough high in the work of dry -type transformer, and the oxidation between transformer installation pin and air is easy.

Description

Technical Field

[0001] This utility model belongs to the field of transformer-related technical technology, and in particular relates to a dry-type transformer with a good sealing structure. Background Technology

[0002] Based on manufacturing processes, dry-type transformers are mainly divided into two categories: epoxy resin cast type and impregnated type. Epoxy resin cast type transformers seal the windings with epoxy resin, offering high protection levels, good mechanical strength, and stable performance, making them the most widely used type. Impregnated type transformers, on the other hand, treat the windings with special insulating varnish, resulting in better heat dissipation and easier on-site repair. Each type has its own strengths. Due to their core advantages of safety and reliability, dry-type transformers are widely used in densely populated areas or places with high fire protection requirements, such as civil buildings (office buildings, hospitals, airports), industrial facilities, and critical infrastructure such as data centers and rail transit. However, dry-type transformers still have the following drawbacks in practical use: Dry-type transformers are installed directly using mounting devices. During installation, the dry-type transformer uses an internal iron core, and the iron yoke is fixed to the transformer support structure. During use, when the external environment vibrates or other factors occur, the iron core is prone to displacement, which affects the stability of the transformer. Secondly, in operation, the coil is directly enclosed within the dry-type transformer. After the coil is enclosed, the energized pins are in direct contact with the air. After energization, the pins are exposed to the air, causing oxidation and affecting the stability of operation. Utility Model Content

[0003] The purpose of this invention is to provide a dry-type transformer with a good sealing structure. By setting up a core assembly, an upper mounting plate, a lower mounting plate, and a coil assembly, the problem of insufficient core stability and easy oxidation between the transformer mounting pins and the air during operation of the dry-type transformer is solved.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a dry-type transformer with a good sealing structure, comprising a core assembly, an upper mounting plate, a lower mounting plate, and a coil assembly. The core assembly includes three vertically arranged, equally spaced core columns, with their central axes aligned on the same plane. A coil assembly is mounted on the outer side of each core column. Each coil assembly has a power-connecting pin fixed at its top and bottom. The power-connecting pins at both ends of the same coil assembly are electrically connected to the positive and negative poles of the coil assembly, respectively. The upper mounting plate is fixed to the upper outer side of the three upper power-connecting pins, and the lower mounting plate is fixed to the lower outer side of the three lower power-connecting pins. The core assembly contains three vertically arranged, equally spaced core columns with their central axes coplanar. A coil assembly is mounted on the outer side of each core column. Positive and negative power-connecting pins are fixed to the upper and lower ends of the coil assembly, respectively. The upper mounting plate is fixed to the outer side of the three upper power-connecting pins, and the lower mounting plate is fixed to the outer side of the three lower power-connecting pins, together supporting the coil assembly and enabling external mounting.

[0005] Furthermore, the core assembly also includes a yoke and a mounting hole 1. The top and bottom ends of the three core columns are respectively fixed with a yoke. Each yoke has a vertical through-hole 1 at both ends. The upper and lower ends of the core column are connected by the yoke to form a closed magnetic circuit. Each yoke has a mounting hole 1 at both ends for installation and fixation to the external structure by bolts.

[0006] Furthermore, the core assembly also includes insulating strips. Insulating strips are fixed at equal intervals on the top of the upper yoke and the bottom of the lower yoke. The top of the insulating strip on the top of the upper yoke is fixed to the bottom of the upper mounting plate, and the bottom of the insulating strip on the bottom of the lower yoke is fixed to the top of the lower mounting plate. Insulating strips are fixed to the surfaces of the upper and lower yokes respectively, and the other end of the insulating strip is connected to the bottom of the upper mounting plate and the top of the lower mounting plate respectively, so as to achieve insulation and fixation between the core assembly and the mounting plate.

[0007] Furthermore, each of the four corners of the upper and lower mounting plates has a vertically penetrating mounting hole II. The upper mounting plate has a fixing port I corresponding to the position of the power connection pins at the top of the three coil assemblies, and the lower mounting plate has a fixing port II corresponding to the position of the power connection pins at the bottom of the three coil assemblies. Mounting holes II are opened at the four corners of the upper and lower mounting plates for connecting to external devices. The upper mounting plate has a fixing port I to fix the power connection pins of the upper coil assembly, and the lower mounting plate has a fixing port II to fix the power connection pins of the lower coil assembly.

[0008] Furthermore, the upper power-connecting pin is fixed through and extends out of the fixing port one, and the lower power-connecting pin is fixed through and extends out of the fixing port two. All the power-connecting pins extending out of the upper or lower mounting plate have through holes for power connection. Insulating sleeves are fixed on the outside of the power-connecting pins between the lower mounting plate and the coil assembly, and between the upper mounting plate and the coil assembly. Power-connecting holes are opened after the power-connecting pins extend out of the fixing ports for connecting external circuits. The part of the power-connecting pin between the mounting plate and the coil assembly is fitted with an insulating sleeve to prevent oxidation and improve safety.

[0009] Furthermore, each coil assembly has insulating posts fixed in a circular array at its top and bottom. The bottom ends of all the insulating posts at the bottom of the coil assembly are fixed to the top of the lower mounting plate, and the top ends of all the insulating posts at the top of the coil assembly are fixed to the bottom of the upper mounting plate. The upper and lower ends of the coil assembly are fixed to the upper and lower mounting plates respectively through the circular array of insulating posts, so that the coil assembly is suspended and supported between the two mounting plates, ensuring insulation and stability.

[0010] This utility model has the following beneficial effects: This invention solves the problem of insufficient core stability in dry-type transformers by setting up a core assembly, an upper mounting plate, and a lower mounting plate. The upper and lower mounting plates are positioned appropriately on the corresponding external mounting components. Installation bolts are then inserted into the mounting holes on the upper and lower mounting plates for installation. When further ensuring the installation stability of the core assembly is required, installation bolts are inserted into the mounting holes of the two yokes and installed between the core assembly and the external mounting structure. This further ensures the stability and stability of the core assembly during operation.

[0011] This invention solves the problem of easy oxidation between the mounting pins of a dry-type transformer and the air by setting up an iron core assembly, an upper mounting plate, a lower mounting plate, and a coil assembly. After the corresponding structure is installed in a suitable position, the magnetic flux passes through the iron core column and generates an induced current in the coil assembly. After connecting the energizing hole on the energizing pin to the installed power line mounting structure, the induced current generated by the magnetic flux passing through the iron core column can change the voltage. During operation, the coil assembly is encapsulated with windings, and the transmitted current is transmitted through the energizing pin. At the same time, the energizing pin between the upper and lower mounting plates is insulated and protected by an outer insulating sleeve to prevent oxidation of the energizing pin and avoid safety hazards, thus ensuring a sealing effect. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A three-dimensional view of the assembly structure of a dry-type transformer with a good sealing structure; Figure 2 This is a three-dimensional structural diagram of the iron core assembly; Figure 3 This is a three-dimensional structural view of the upper mounting plate; Figure 4 This is a three-dimensional structural view of the lower mounting plate; Figure 5 This is a three-dimensional structural diagram of the coil assembly.

[0014] Figure label: 1. Iron core assembly; 101. Yoke; 102. Mounting hole one; 103. Insulating strip; 104. Iron core post; 2. Upper mounting plate; 201. Fixing port one; 202. Mounting hole two; 3. Lower mounting plate; 301. Fixing port two; 4. Coil assembly; 401. Insulating post; 402. Power connection pin; 4021. Power connection hole; 403. Insulating sleeve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0016] Please see Figure 1-4This utility model relates to a dry-type transformer with a good sealing structure, comprising a core assembly 1, an upper mounting plate 2, a lower mounting plate 3, and a coil assembly 4. The core assembly 1 includes three vertically arranged side-by-side core columns 104 with equal spacing. The core assembly 1 transmits magnetic flux to the coil assembly 4 through the core columns 104. The central axes of the three core columns 104 are arranged on the same plane. A coil assembly 4 is arranged on the outer side of each core column 104. When a changing magnetic field passes through the coil assembly 4, a transformed induced current is generated, changing the voltage of the transmitted power. The top and bottom ends of each coil assembly 4 are fixed. There are power-connecting pins 402, which are connected to external power transmission lines to transmit power. The power-connecting pins 402 at both ends of the same coil assembly 4 are electrically connected to the positive and negative poles of the coil assembly 4 respectively to provide power to the coil assembly 4. The upper mounting plate 2 is fixed to the upper part of the outer side of the three upper power-connecting pins 402, and the lower mounting plate 3 is fixed to the lower part of the outer side of the three lower power-connecting pins 402. The upper mounting plate 2 and the lower mounting plate 3 are combined to cooperate with external installation equipment for installation, and the three coil assemblies 4 are supported and set between the upper mounting plate 2 and the lower mounting plate 3.

[0017] Specifically, the core assembly 1 also includes a yoke 101 and a mounting hole 102. The top and bottom ends of the three core columns 104 are respectively fixed with yokes 101. Each yoke 101 has a vertical through-hole 102 at both ends. The core assembly 1 connects the three core columns 104 through the yokes 101, and together they form a complete, low magnetic resistance closed magnetic circuit. The mounting bolts are movably connected through the mounting hole 102 to cooperate with the external mounting structure.

[0018] Furthermore, the core assembly 1 also includes insulating strips 103. Insulating strips 103 are fixed at equal intervals on the top of the upper yoke 101 and the bottom of the lower yoke 101. The top of the insulating strips 103 on the upper yoke 101 is fixed to the bottom of the upper mounting plate 2, and the bottom of the insulating strips 103 on the lower yoke 101 is fixed to the top of the lower mounting plate 3. During operation, the core assembly 1 is connected to the upper mounting plate 2 and the lower mounting plate 3 through the insulating strips 103 on the two yokes 101.

[0019] Furthermore, each of the four corners of the upper mounting plate 2 and the lower mounting plate 3 has a vertically penetrating mounting hole 202. The upper mounting plate 2 has a fixing port 201 corresponding to the position of the power connection pin 402 at the top of the three coil assemblies 4. The lower mounting plate 3 has a fixing port 301 corresponding to the position of the power connection pin 402 at the bottom of the three coil assemblies 4. The upper mounting plate 2 and the lower mounting plate 3 are connected to the external mounting equipment bracket through the mounting hole 202. The upper mounting plate 2 fixes the power connection pin 402 at the top of the coil assembly 4 through the fixing port 201, and the lower mounting plate 3 fixes the power connection pin 402 at the bottom of the coil assembly 4 through the fixing port 301.

[0020] The operation process of this embodiment is as follows: During operation, the upper mounting plate 2 and the lower mounting plate 3 are first set in the appropriate positions corresponding to the external mounting components. Then, the mounting bolts are inserted into the mounting holes 202 of the upper mounting plate 2 and the lower mounting plate 3 for installation. When it is necessary to further ensure the installation stability of the core assembly 1, the mounting bolts are inserted into the mounting holes of the two yokes 101 and installed between them and the external mounting structure. This further ensures the installation stability of the core assembly 1 during operation and guarantees the working stability. Specific Implementation Example 2

[0021] Please see Figure 1-5 Based on the first specific embodiment, the upper power connection pin 402 is fixed through and extends out of the fixing port 201, and the lower power connection pin 402 is fixed through and extends out of the fixing port 301. All the power connection pins 402 extending out of the upper mounting plate 2 or the lower mounting plate 3 are provided with power connection holes 4021. Insulating sleeves 403 are fixed on the outside of the power connection pins 402 between the lower mounting plate 3 and the coil assembly 4, and between the upper mounting plate 2 and the coil assembly 4. After the power connection pins 402 extend out of the upper mounting plate 2 and the lower mounting plate 3, the external power connection line is inserted into the power connection hole 4021 of the power connection pin 402 and screwed in to complete the external power connection installation.

[0022] Specifically, each coil assembly 4 has insulating posts 401 fixed in a ring array at its top and bottom. The bottom ends of all the insulating posts 401 at the bottom of the coil assembly 4 are fixed to the top of the lower mounting plate 3, and the top ends of all the insulating posts 401 at the top of the coil assembly 4 are fixed to the bottom of the upper mounting plate 2. The coil assembly 4 is fixed to the lower mounting plate 3 and the upper mounting plate 2 through the insulating posts 401, so that the coil assembly 4 is suspended and supported between the upper mounting plate 2 and the lower mounting plate 3.

[0023] The operation process of this embodiment is as follows: In operation, after the corresponding structure is installed in a suitable position, the magnetic flux passes through the iron core column 104 and generates an induced current in the coil assembly 4. After connecting the power connection hole 4021 on the power connection pin 402 to the installed power line mounting structure, the induced current can be generated through the magnetic flux passing through the iron core column 104 to change the voltage. In operation, the coil assembly 4 encloses the coil, and the transmitted current is transmitted through the power connection pin 402. At the same time, the power connection pin 402 between the upper mounting plate 2 and the lower mounting plate 3 is insulated and protected by the insulating sleeve 403 on its outer side to prevent the power connection pin 402 from being oxidized and causing safety hazards.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dry-type transformer with a good sealing structure, comprising a core assembly (1), an upper mounting plate (2), a lower mounting plate (3), and a coil assembly (4), characterized in that: The core assembly (1) includes three vertically arranged core columns (104) with equal spacing. The central axes of the three core columns (104) are arranged on the same plane. A coil assembly (4) is provided on the outer side of each core column (104). A power connection pin (402) is fixed at the top and bottom of each coil assembly (4). The power connection pins (402) at both ends of the same coil assembly (4) are electrically connected to the positive and negative poles of the coil assembly (4) respectively. An upper mounting plate (2) is fixed on the upper part of the outer side of the three upper power connection pins (402), and a lower mounting plate (3) is fixed on the lower part of the outer side of the three lower power connection pins (402).

2. The dry-type transformer with a good sealing structure according to claim 1, characterized in that: The core assembly (1) also includes a yoke (101) and a mounting hole (102). The top and bottom ends of the three core columns (104) are respectively fixed with yokes (101), and each yoke (101) has a vertical through-hole (102) at both ends.

3. The dry-type transformer with a good sealing structure according to claim 1, characterized in that: The core assembly (1) also includes insulating strips (103). Insulating strips (103) are fixed at equal intervals on the top of the upper yoke (101) and the bottom of the lower yoke (101). The top of the insulating strips (103) on the upper yoke (101) is fixed to the bottom of the upper mounting plate (2), and the bottom of the insulating strips (103) on the lower yoke (101) is fixed to the top of the lower mounting plate (3).

4. The dry-type transformer with a good sealing structure according to claim 1, characterized in that: Mounting holes 2 (202) are vertically opened at the four corners of the upper mounting plate (2) and the lower mounting plate (3). Fixing opening 1 (201) is opened on the upper mounting plate (2) corresponding to the position of the power connection pin (402) at the top of the three coil assemblies (4). Fixing opening 2 (301) is opened on the lower mounting plate (3) corresponding to the position of the power connection pin (402) at the bottom of the three coil assemblies (4).

5. The dry-type transformer with a good sealing structure according to claim 4, characterized in that: The upper power-connecting pin (402) is fixed inside the first fixing port (201) and extends out. The lower power-connecting pin (402) is fixed inside the second fixing port (301) and extends out. All the power-connecting pins (402) extending out of the upper mounting plate (2) or the lower mounting plate (3) are provided with power-connecting holes (4021). The outer side of the power-connecting pins (402) between the lower mounting plate (3) and the coil assembly (4) and between the upper mounting plate (2) and the coil assembly (4) is fixed with an insulating sleeve (403).

6. The dry-type transformer with a good sealing structure according to claim 1, characterized in that: Each coil assembly (4) has an insulating post (401) fixed in a ring array at its top and bottom. The bottom ends of all the insulating posts (401) at the bottom of the coil assembly (4) are fixed together to the top of the lower mounting plate (3), and the top ends of all the insulating posts (401) at the top of the coil assembly (4) are fixed to the bottom of the upper mounting plate (2).

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