Three-phase dry-type isolation transformer

Abstract

The utility model provides a three-phase dry-type isolation transformer, which belongs to the technical field of isolation transformers and comprises a transformer box. The hollow supporting frame is fixedly connected to the bottom of the transformer box, and lifting grooves are formed in the four corners of the top of the hollow supporting frame; the number of the L-shaped guide blocks is four, and the four L-shaped guide blocks slide in the four lifting grooves; and the lifting mechanisms are arranged between the inner walls of the hollow supporting frame, the hollow supporting frame bears the weight of the transformer box, interference of the multiple L-shaped guide blocks on supporting of the transformer box by the hollow supporting frame is avoided, and through lifting of the multiple L-shaped guide blocks, the transformer box can be supported by the hollow supporting frame. Drainage of water drops on the outer wall of the box body by the three-phase dry-type isolation transformer is increased, the water drops are prevented from being condensed at the bottom of the isolation box body of the three-phase dry-type isolation transformer, the bottom of the isolation box body of the three-phase dry-type isolation transformer is prevented from being oxidized and corroded, and the service life of the three-phase dry-type isolation transformer is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of isolation transformers, and particularly relates to a three-phase dry-type isolation transformer. Background Art

[0002] A three-phase dry-type isolation transformer refers to a transformer formed by connecting three single-phase transformers in a three-phase connection mode, which is specially designed for handling the power transmission and voltage conversion in a three-phase alternating current (AC) power system and has no oil medium. Its insulating medium is air or other dry gases. The input winding and the output winding are electrically isolated transformers. It realizes the power transmission and voltage conversion through the principle of electromagnetic induction, and at the same time ensures no electrical connection between the input and the output, achieving the purpose of electrical isolation. It has strong electrical isolation safety, strong adaptability to harsh environments, and the functions of converting between high and low voltages and reducing noise according to the usage needs.

[0003] The authorized publication number "CN219642638U" records that "by installing a three-phase dry-type isolation transformer in a cabinet body and setting a heat dissipation device, when heat dissipation is required, pull the pull ring and the iron rod to the side away from the fixed rod, the magnetic ring loses the adsorption on the iron rod, and at the same time the iron rod is pulled out from the jack on the surface of the fixed rod. When moving the position of the fixed ring and the nozzle in the fixed rod and adjusting to the vicinity of the corresponding transformer, push the iron rod to the side close to the fixed rod, insert the iron rod into the corresponding jack on the surface of the fixed rod, and the magnetic ring adsorbs and positions the iron rod. The hair dryer sends air into the pipe body through the air inlet pipe, and the pipe body discharges air from the nozzle through the hose. Multiple nozzles blow air on the transformer evenly to complete the use. By setting the heat dissipation device, it is convenient for the transformer in the power distribution cabinet to dissipate heat evenly, and effectively reduces the phenomenon that when the existing transformer in the distribution cabinet dissipates heat through the fan on the top of the cabinet body and the heat dissipation holes on both sides, but the fan can only dissipate heat on the top of the transformer during heat dissipation, resulting in poor heat dissipation effect on the bottom of the transformer due to uneven blowing, reducing the heat dissipation effect of the equipment, which is likely to cause damage to the transformer in the power distribution cabinet, affect its service life and cause danger, thereby improving the overall practicability of the equipment."

[0004] The above-mentioned patent installs a three-phase dry-type isolation transformer in the cabinet body and sets up a heat dissipation device. When heat dissipation is required, the pull ring and the iron rod are pulled towards the side away from the fixed rod, the magnetic ring loses its adsorption on the iron rod, and at the same time, the iron rod is pulled out from the jack on the surface of the fixed rod. When moving the position of the fixed ring and the nozzle in the fixed rod and adjusting to the vicinity of the corresponding transformer, the iron rod is pushed towards the side close to the fixed rod, and the iron rod is inserted into the corresponding jack on the surface of the fixed rod. The magnetic ring adsorbs and positions the iron rod. The hair dryer sends air into the pipe body through the air inlet pipe, and the pipe body discharges the air from the nozzle through the hose. Multiple nozzles blow air evenly on the transformer to complete the use. By setting up the heat dissipation device, it is convenient for the transformer in the power distribution cabinet to dissipate heat evenly, which can effectively reduce the phenomenon that when the existing transformer cabinet dissipates heat from the top fan and the heat dissipation holes on both sides of the cabinet body, but the fan can only dissipate heat from the top of the transformer during heat dissipation, resulting in poor heat dissipation effect at the bottom of the transformer due to uneven blowing, reducing the poor heat dissipation effect of the equipment, which is likely to cause damage to the transformer in the power distribution cabinet and affect its service life and cause danger. Furthermore, the overall practicality of the equipment is improved. However, in the actual use process, the three-phase dry-type isolation transformer is installed in a humid environment, and water droplets are extremely likely to condense at the bottom of the isolation box body of the existing three-phase dry-type isolation transformer, causing the bottom of the isolation box body of the three-phase dry-type isolation transformer to be easily oxidized and corroded, resulting in a reduction in the service life of the three-phase dry-type isolation transformer. For this reason, we propose a three-phase dry-type isolation transformer. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-phase dry-type isolation transformer, aiming to solve the problem that when the three-phase dry-type isolation transformer is used in a humid environment, water droplets condense at the bottom of the isolation box body of the three-phase dry-type isolation transformer, resulting in easy oxidation and corrosion of the bottom of the isolation box body of the three-phase dry-type isolation transformer, and reducing the service life of the three-phase dry-type isolation transformer.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A three-phase dry-type isolation transformer, including a transformer box;

[0008] A hollow support frame, which is fixedly connected to the bottom of the transformer box, and lifting grooves are opened at the four corners of the top of the hollow support frame;

[0009] Four L-shaped guiding blocks, four L-shaped guiding blocks slide in the four lifting grooves; and

[0010] A lifting mechanism, which is provided with four groups, the four groups of the lifting mechanism are arranged between the inner walls of the hollow support frame, and the four groups of the lifting mechanism are connected to the four L-shaped guiding blocks to push the four L-shaped guiding blocks to extend out.

[0011] As a preferred solution of the present utility model, each set of the lifting mechanism includes an elastic component and a guiding component. The elastic component is arranged inside the hollow support frame, the elastic component is connected to the L-shaped guiding block, the guiding component is arranged between the inner walls of the lifting groove, and the guiding component is connected to the L-shaped guiding block.

[0012] As a preferred solution of the present utility model, the guiding component includes a limiting groove and a limiting block. There are multiple limiting grooves, and the multiple limiting grooves are opened on the inner wall of the lifting groove. There are multiple limiting blocks, and the multiple limiting blocks slide in the multiple limiting grooves, and the multiple limiting blocks are all connected to the L-shaped guiding block.

[0013] As a preferred solution of the present utility model, the elastic component includes a mounting hole, a hollow column, a lifting column and a spring. The mounting hole is opened at the bottom of the transformer tank, the mounting hole is communicated with the inner walls of the transformer tank and the hollow support frame, the hollow column is fixedly connected between the inner walls of the mounting hole, the spring slides between the inner walls of the hollow column, the bottom of the spring is connected to the L-shaped guiding block, the lifting column is sleeved on the circumferential surface of the spring, and one end of the lifting column is fixedly connected to the inner wall of the hollow column, and the other end of the lifting column is fixedly connected to the circumferential surface of the spring.

[0014] As a preferred solution of the present utility model, a plurality of arc-shaped grooves are opened at the bottom of the hollow support frame.

[0015] As a preferred solution of the present utility model, the bottoms of the four L-shaped guiding blocks are all in a beveled shape.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] 1. In this solution, when the three-phase dry-type isolation transformer is hung and installed, the multiple lifting columns press down to push the multiple springs, and the multiple springs push the multiple L-shaped guiding blocks to press down, pushing the multiple L-shaped guiding blocks out of the multiple lifting grooves, so that the multiple L-shaped guiding blocks are located at the four corners of the bottom of the hollow support frame, which is convenient for guiding the water flow to the four corners of the bottom of the hollow support frame. And when the transformer tank is placed on the ground, the hollow support frame bears the weight of the transformer tank, and the multiple L-shaped guiding blocks contract into the hollow support frame, avoiding the interference of the multiple L-shaped guiding blocks on the hollow support frame for supporting the transformer tank. By lifting the multiple L-shaped guiding blocks, the drainage of water droplets on the outer wall of the three-phase dry-type isolation transformer is increased, preventing the water droplets from condensing at the bottom of the isolation box of the three-phase dry-type isolation transformer, preventing the bottom of the isolation box of the three-phase dry-type isolation transformer from being oxidized and corroded, and improving the service life of the three-phase dry-type isolation transformer.

[0018] 2. In this solution, during the lifting process of the L-shaped guiding block, multiple limiting blocks guide the limiting grooves through sliding cooperation with multiple limiting grooves, ensuring that the L-shaped guiding block is vertically pushed out of the lifting groove, preventing the L-shaped guiding block from shifting, preventing the water droplets guided by the L-shaped guiding block from shifting, ensuring that the guided water droplets fall vertically, reducing the water droplets from falling onto other electronic components, enabling the water droplets at the bottom of the three-phase dry-type isolation transformer to fall vertically, and preventing the water droplets from corroding and damaging other electronic components. Description of the Drawings

[0019] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0020] Figure 1 is the first perspective view of the three-phase dry-type isolation transformer of the present utility model;

[0021] Figure 2 is the second perspective view of the three-phase dry-type isolation transformer of the present utility model;

[0022] Figure 3 is the half-sectional view of the three-phase dry-type isolation transformer of the present utility model;

[0023] Figure 4 is the partial structure diagram of the three-phase dry-type isolation transformer of the present utility model;

[0024] Figure 5 is the exploded view of the lifting mechanism of the three-phase dry-type isolation transformer of the present utility model;

[0025] Figure 6 is the half-sectional view of the partial structure of the three-phase dry-type isolation transformer of the present utility model.

[0026] In the figures: 1, transformer box; 2, hollow support frame; 3, lifting groove; 4, L-shaped guiding block; 5, limiting groove; 6, limiting block; 7, mounting hole; 8, hollow column; 9, lifting column; 10, spring; 11, arc groove. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment 1

[0029] Refer to Figure 1- Figure 6 , a three-phase dry-type isolation transformer, comprising:

[0030] A transformer box 1;

[0031] A hollow support frame 2, the hollow support frame 2 is fixedly connected to the bottom of the transformer box 1, and lifting grooves 3 are opened at the four corners of the top of the hollow support frame 2;

[0032] Four L-shaped guiding blocks 4, there are four L-shaped guiding blocks 4, and the four L-shaped guiding blocks 4 slide in the four lifting grooves 3; and

[0033] A lifting mechanism, there are four groups of lifting mechanisms, the four groups of lifting mechanisms are arranged between the inner walls of the hollow support frame 2, and the four groups of lifting mechanisms are connected to the four L-shaped guiding blocks 4 to push the four L-shaped guiding blocks 4 to extend out.

[0034] In the present utility model, the transformer box 1 is used to accommodate the transformer, the hollow support frame 2 is used to support and fix the transformer box 1, and the hollow support frame 2 is used to guide the water droplets flowing down along the outer surface of the transformer box 1 to the four corners of the bottom of the hollow support frame 2. The opening of the four lifting grooves 3 also accommodates the four L-shaped guiding blocks 4, and the four L-shaped guiding blocks 4 are used to conduct fixed-point guidance on the water droplets. The four groups of lifting mechanisms are connected to the four L-shaped guiding blocks 4 to push the four L-shaped guiding blocks 4 to extend out.

[0035] Each group of lifting mechanisms includes an elastic component and a guiding component. The elastic component is arranged in the hollow support frame 2, the elastic component is connected to the L-shaped guiding block 4, the guiding component is arranged between the inner walls of the lifting groove 3, and the guiding component is connected to the L-shaped guiding block 4.

[0036] In the present utility model, the elastic component is used to push the L-shaped guiding block 4 out of the lifting groove 3, and the guiding component is used to vertically guide the L-shaped guiding block 4.

[0037] The guiding component includes a limiting groove 5 and a limiting block 6. There are multiple limiting grooves 5, and the multiple limiting grooves 5 are opened on the inner wall of the lifting groove 3. There are multiple limiting blocks 6, and the multiple limiting blocks 6 slide in the multiple limiting grooves 5, and the multiple limiting blocks 6 are all connected to the L-shaped guiding block 4.

[0038] In the present utility model, a plurality of limiting grooves 5 are used to accommodate the sliding of a plurality of limiting blocks 6. The plurality of limiting blocks 6 vertically guide the L-shaped guiding block 4 through sliding cooperation with the plurality of limiting grooves 5. During the lifting and lowering process of the L-shaped guiding block 4, the plurality of limiting blocks 6 guide the limiting grooves 5 through sliding cooperation with the plurality of limiting grooves 5, ensuring that the L-shaped guiding block 4 is vertically pushed out of the lifting groove 3, avoiding deviation of the L-shaped guiding block 4, preventing the water droplets guided by the L-shaped guiding block 4 from deviating, ensuring that the guided water droplets fall vertically, reducing the water droplets from falling onto other electronic components, enabling the water droplets at the bottom of the three-phase dry-type isolation transformer to fall vertically, and preventing the corrosion and damage of other electronic components by the water droplets.

[0039] The elastic component includes a mounting hole 7, a hollow column 8, a lifting column 9, and a spring 10. The mounting hole 7 is opened at the bottom of the transformer tank 1. The mounting hole 7 is communicated with the inner walls of the transformer tank 1 and the hollow support frame 2. The hollow column 8 is fixedly connected between the inner walls of the mounting hole 7. The spring 10 slides between the inner walls of the hollow column 8. The bottom of the spring 10 is connected to the L-shaped guiding block 4. The lifting column 9 is sleeved on the circumferential surface of the spring 10, and one end of the lifting column 9 is fixedly connected to the inner wall of the hollow column 8, and the other end of the lifting column 9 is fixedly connected to the circumferential surface of the spring 10.

[0040] In the present utility model, the opening of the mounting hole 7 is used to fixedly connect the hollow column 8. The spring 10 pushes the L-shaped guiding block 4 to lift and lower through sliding cooperation with the hollow column 8. The lifting column 9 squeezes and pushes the spring 10 to fall, and then pushes the L-shaped guiding block 4 out of the lifting groove 3. When the three-phase dry-type isolation transformer is hung and installed, the plurality of lifting columns 9 press down to push the plurality of springs 10, and the plurality of springs 10 push the plurality of L-shaped guiding blocks 4 to press down, pushing the plurality of L-shaped guiding blocks 4 out of the plurality of lifting grooves 3, so that the plurality of L-shaped guiding blocks 4 are located at the four corners of the bottom of the hollow support frame 2, facilitating the guiding of water flow to the four corners of the bottom of the hollow support frame 2. And when the transformer tank 1 is placed on the ground, the hollow support frame 2 bears the weight of the transformer tank 1, and the plurality of L-shaped guiding blocks 4 contract into the hollow support frame 2, avoiding the interference of the plurality of L-shaped guiding blocks 4 on the hollow support frame 2 for supporting the transformer tank 1. By lifting and lowering the plurality of L-shaped guiding blocks 4, the drainage of water droplets on the outer wall of the three-phase dry-type isolation transformer is increased, avoiding the condensation of water droplets at the bottom of the isolation box body of the three-phase dry-type isolation transformer, preventing the oxidation and corrosion of the bottom of the isolation box body of the three-phase dry-type isolation transformer, and improving the service life of the three-phase dry-type isolation transformer.

[0041] A plurality of arc-shaped grooves 11 are opened at the bottom of the hollow support frame 2.

[0042] In the present utility model, the opening of the plurality of arc-shaped grooves 11 is used to effectively divert the water droplets received by the hollow support frame 2 to the four corners of the bottom of the hollow support frame 2, effectively aggregating and diverting the water droplets generated by the isolation box body of the three-phase dry-type isolation transformer.

[0043] The bottoms of the four L-shaped guiding blocks 4 are all in a beveled shape.

[0044] In the present utility model, the bottoms of the four L-shaped guiding blocks 4 are all in a beveled shape, so as to centrally guide and drip the water droplets shunted along the hollow support frame 2.

[0045] The working principle of the three-phase dry-type isolation transformer provided by the present utility model is as follows:

[0046] When the three-phase dry-type isolation transformer is hung and installed, the four lifting columns 9 squeeze and push the four springs 10, the four springs 10 press down the four L-shaped guiding blocks 4, and the four limiting grooves 5 guide the lifting of the four L-shaped guiding blocks 4 through the sliding fit with the four limiting blocks 6, and then push the four L-shaped guiding blocks 4 out of the four lifting grooves 3, so that the four L-shaped guiding blocks 4 are located at the four corners of the bottom of the hollow support frame 2. The water droplets flow along the outer surface of the transformer tank 1 to the hollow support frame 2 and then flow along the hollow support frame 2 to the four corners of the bottom of the hollow support frame 2. The water droplets vertically drip from the bottoms of the four L-shaped guiding blocks 4. When the transformer tank 1 is on the ground, the hollow support frame 2 bears the weight of the transformer tank 1, and the multiple L-shaped guiding blocks 4 contract into the hollow support frame 2 to avoid the interference of the multiple L-shaped guiding blocks 4 on the hollow support frame 2 for supporting the transformer tank 1. By lifting and lowering the multiple L-shaped guiding blocks 4, the drainage of the water droplets on the outer wall of the box body of the three-phase dry-type isolation transformer is increased, the water droplets are prevented from aggregating at the bottom of the isolation box body of the three-phase dry-type isolation transformer, the bottom of the isolation box body of the three-phase dry-type isolation transformer is prevented from being oxidized and corroded, and the service life of the three-phase dry-type isolation transformer is improved.

[0047] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. Three-phase dry-type isolation transformer, characterized in that: include; Transformer box (1); A hollow support frame (2), the hollow support frame (2) being fixedly connected to the bottom of the transformer box (1), and the top four corners of the hollow support frame (2) being provided with lifting slots (3); L-shaped guide blocks (4), wherein four L-shaped guide blocks (4) are provided, and the four L-shaped guide blocks (4) slide in the four lifting grooves (3); and The lifting mechanism comprises four groups, the four groups of the lifting mechanism are arranged between the inner walls of the hollow support frame (2), and the four groups of the lifting mechanism are connected to four L-shaped guide blocks (4) to push the four L-shaped guide blocks (4) to extend.

2. The three-phase dry-type isolation transformer according to claim 1, characterized in that: Each group of the lifting mechanisms comprises an elastic component and a guide component, wherein the elastic component is arranged in a hollow support frame (2), the elastic component is connected to an L-shaped guide block (4), the guide component is arranged between the inner walls of the lifting groove (3), and the guide component is connected to the L-shaped guide block (4).

3. The three-phase dry-type isolation transformer according to claim 2, characterized in that: The guide assembly comprises a limit groove (5) and a limit block (6), wherein a plurality of limit grooves (5) are provided, and the plurality of limit grooves (5) are opened on the inner wall of the lifting groove (3), and a plurality of limit blocks (6) are provided, and the plurality of limit blocks (6) slide in the plurality of limit grooves (5), and the plurality of limit blocks (6) are all connected to the L-shaped guide block (4).

4. The three-phase dry-type isolation transformer according to claim 3, characterized in that: The elastic component comprises a mounting hole (7), a hollow column (8), a lifting column (9) and a spring (10); the mounting hole (7) is opened at the bottom of the transformer box (1); the mounting hole (7) is connected to the transformer box (1) and the inner wall of the hollow support frame (2); the hollow column (8) is fixedly connected between the inner walls of the mounting hole (7); the spring (10) slides between the inner walls of the hollow column (8); the bottom of the spring (10) is connected to the L-shaped guide block (4); the lifting column (9) is sleeved on the circumferential surface of the spring (10); one end of the lifting column (9) is fixedly connected to the inner wall of the hollow column (8); and the other end of the lifting column (9) is fixedly connected to the circumferential surface of the spring (10).

5. The three-phase dry-type isolation transformer according to claim 4, characterized in that: A plurality of arc-shaped grooves (11) are provided at the bottom of the hollow support frame (2).

6. The three-phase dry-type isolation transformer according to claim 5, characterized in that: The bottoms of the four L-shaped guide blocks (4) are all in a beveled shape.

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