A multi-stage variable pressure core

Abstract

The utility model relates to a kind of multistage transformer core in transformer technical field, including the yoke sheet of a plurality of pieces mutual stacking and fixing bolt, yoke sheet is the silicon steel sheet of "mouth" character type structure, the upper edge and lower edge of yoke sheet are upper yoke iron and lower yoke iron respectively, the both sides of yoke sheet are fixed column core for winding coil, two movable column cores are equipped between upper yoke iron and lower yoke iron, movable column core and yoke sheet are split type structure between, the end of yoke sheet is equipped with the clamping portion of fork groove, movable column core is respectively and upper yoke iron and lower yoke iron between by clamping portion gap fit, movable column core can be located between two fixed column cores and move, two movable column cores can be moved to the middle part of yoke sheet for winding coil, this structure can be adapted to multistage transformation and single-stage transformation, it is strong in adaptability, while its overall rigidity, with good support stability.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a multi-stage transformer core. Background Technology

[0002] The iron core is the main magnetic circuit part of a transformer. It is usually made of hot-rolled or cold-rolled silicon steel sheets with high silicon content and coated with insulating varnish. The iron core and the coils wound on it form a complete electromagnetic induction system. The power transmission capacity of a power transformer depends on the material and cross-section of the iron core.

[0003] Existing multi-stage transformer cores generally have a common core and several windings interconnected with it. When a winding receives AC power from a power source, the voltage changes through the electromagnetic induction principle of inductance generating magnetism and magnetism generating electricity. However, existing multi-stage transformer cores are typically formed by stacking two E-shaped cores together to form a complete transformer core. The positioning of these cores during assembly is relatively complicated, resulting in low production efficiency; furthermore, they are prone to disintegration after assembly. See Chinese Utility Model Patent No. CN202230839U for reference.

[0004] Therefore, in view of these circumstances, there is an urgent need to develop a multi-stage transformer core to meet the needs of practical applications. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage transformer core to solve the above-mentioned defects.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A multi-stage transformer core includes several stacked yoke plates and fixing bolts. The yoke plates are silicon steel sheets with a "U"-shaped structure. The upper and lower edges of the yoke plates are the upper yoke and the lower yoke, respectively. Both sides of the yoke plates are fixed cores for winding coils. Two movable cores are provided between the upper and lower yoke plates. The movable cores and the yoke plates are separate structures. The ends of the yoke plates are provided with fork-shaped clamping parts. The movable cores are respectively clearance-fitted with the upper and lower yoke plates through the clamping parts. The movable cores can move between the two fixed cores. The two movable cores can move to the middle of the yoke plates for winding coils.

[0008] In the above description, as a further embodiment, both end faces of the upper and lower yokes are provided with inwardly recessed first inner grooves, the clamping part can be slidably clamped with the first inner grooves, and the surface of the movable core is kept in the same plane as the surfaces of the upper and lower yokes.

[0009] As a further embodiment of the above description, both ends of the inner side of the fixed column core are provided with an inwardly recessed second inner groove. The movable column core is provided with a vertically opened inner groove on the side close to the adjacent fixed column core. When the movable column core moves to the side of the fixed column core, the second inner groove can be embedded in the inner groove, and the movable column core covers the inner side of the fixed column core.

[0010] As a further embodiment of the above description, the end of the movable column core is provided with a horizontally opened positioning hole, and the middle part of the first inner sinker and the end of the second inner sinker are both provided with a first fixing hole and a second fixing hole that match the positioning hole. The positioning hole and the first fixing hole and the second fixing hole are connected and fixed by fixing bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: A movable core, which can move between two fixed cores, is provided between the upper and lower yokes. When the movable core moves to the middle of the upper and lower yokes, the coil can be wound between the two movable cores, forming a multi-stage transformer structure. When the two movable cores move towards the fixed cores on both sides, the movable cores and fixed cores merge into one, and the coil can be wound between the movable cores and fixed cores, forming a single-stage transformer structure. This structure is adaptable to both multi-stage and single-stage transformer situations, has strong adaptability, and possesses high overall rigidity, providing good support stability. Attached Figure Description

[0012] Figure 1 This is an exploded view of the structure of a multi-stage transformer core described in this embodiment;

[0013] Figure 2 This is a schematic diagram of the structure of the yoke sheet in the single-stage transformer system described in this embodiment;

[0014] Figure 3 This is a schematic diagram of the structure of the yoke sheet in the multi-stage transformer system described in this embodiment;

[0015] Figure 4 This is a perspective structural diagram of the movable column core described in this embodiment;

[0016] Figure 5 for Figure 4 A magnified schematic diagram of the structure of part A in the diagram;

[0017] In the figure: 1-Yoke plate, 2-Fixing bolt, 11-Upper yoke, 12-Lower yoke, 111-First inner recessed groove, 112-Second inner recessed groove, 13-Fixing column core, 14-Modible column core, 141-Clamping part, 142-Inner groove, 15-First fixing hole, 16-Second fixing hole, 17-Positioning hole. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] For this embodiment, please refer to Figures 1-5 The specific implementation of the multi-stage transformer core includes several stacked yoke plates 1 and fixing bolts 2. The yoke plates 1 are silicon steel sheets with a "U"-shaped structure. The upper and lower edges of the yoke plates 1 are upper yoke 11 and lower yoke 12, respectively. Both sides of the yoke plates 1 are fixed cores 13 for winding coils. Two movable cores 14 are provided between the upper yoke 11 and the lower yoke 12. The movable cores 14 and the yoke plates 1 are separate structures. The end of the yoke plates 1 is provided with a forked groove-shaped clamping part 141. The movable cores 14 are respectively clearance-fitted with the upper yoke 11 and the lower yoke 12 through the clamping part 141. The movable cores 14 can move between the two fixed cores 13. The two movable cores 14 can move to the middle of the yoke plates 1 for winding coils.

[0020] A movable core 14, which can move between two fixed cores 13, is provided between the upper yoke 11 and the lower yoke 12. When the movable core 14 moves to the middle of the upper yoke 11 and the lower yoke 12, the coil can be wound between the two movable cores 14, so that the iron core forms a multi-stage transformer structure. When the two movable cores 14 move to the side of the fixed core 13 respectively, the movable core 14 and the fixed core 13 merge into one, and the coil can be wound between the movable core 14 and the fixed core 13 to form a single-stage transformer structure. This structure can adapt to both multi-stage and single-stage transformer situations, has strong adaptability, and has high overall rigidity and good support stability.

[0021] Furthermore, such as Figure 2 and Figure 3 As shown, both inner end faces of the upper yoke 11 and the lower yoke 12 are provided with inwardly recessed first inner grooves 111. The clamping part 141 can be slidably clamped with the first inner grooves 111, and the surface of the movable core 14 is kept in the same plane as the surfaces of the upper yoke 11 and the lower yoke 12.

[0022] Furthermore, such as Figure 4 and Figure 5As shown, both ends of the inner side of the fixed core 13 are provided with an inwardly recessed second inner groove 112. The movable core 14 is provided with a vertically opened inner groove 142 on the side near the adjacent fixed core 13. When the movable core 14 moves to the side of the fixed core 13, the second inner groove 112 can be embedded in the inner groove 142. The movable core 14 covers the inner side of the fixed core 13. The end of the movable core 14 is provided with a horizontally opened positioning hole 17. The middle part of the first inner groove 111 and the end of the second inner groove 112 are provided with a first fixing hole 15 and a second fixing hole 16 that match the positioning hole 17. The positioning hole 17 is connected and fixed to the first fixing hole 15 and the second fixing hole 16 by a fixing bolt 2.

[0023] An installation process for a multi-stage transformer core: Several yoke plates 1 are stacked on top of each other. Then, the movable column core 14 is moved to the middle of the upper yoke 11 and the lower yoke 12. The fixing bolts 2 are aligned with the first fixing hole 15 and the positioning hole 17, so that the fixing bolts 2 pass through the first fixing hole 15 and the positioning hole 17 for insertion and fixation. Then, the fixing bolts 2 pass through the second fixing hole 16 to insert and fix the several yoke plates 1, thus completing the installation of the multi-stage transformer core.

[0024] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A multi-stage transformer core, comprising a plurality of stacked yoke plates and fixing bolts, characterized in that: The yoke iron sheet is a silicon steel sheet with a "mouth" - shaped structure. The upper edge and the lower edge of the yoke iron sheet are the upper yoke iron and the lower yoke iron respectively. Both sides of the yoke iron sheet are fixed column cores for winding coils. There are two movable column cores between the upper yoke iron and the lower yoke iron. The structure between the movable column cores and the yoke iron sheet is a split - type structure. The end of the yoke iron sheet is provided with a fork - groove - shaped clamping part. The movable column cores are in clearance fit with the upper yoke iron and the lower yoke iron respectively through the clamping parts. The movable column cores can move between the two fixed column cores, and the two movable column cores can move to the middle of the yoke iron sheet for winding coils.

2. The multi-stage transformer core according to claim 1, characterized in that: Both end faces on the inner sides of the upper yoke iron and the lower yoke iron are provided with first inner sunk - groove parts that are recessed inward. The clamping part can slide and clamp with the first inner sunk - groove parts, and the surfaces of the movable column cores are in the same plane as the surfaces of the upper yoke iron and the lower yoke iron.

3. A multi-stage transformer core according to claim 1, characterized in that: Both end faces on the inner sides of the fixed column cores are provided with second inner sunk - groove parts that are recessed inward. A vertically - opened embedded groove is provided on one side of the movable column core close to the adjacent fixed column core. When the movable column core moves towards the fixed column core side, the second inner sunk - groove part can be embedded in the embedded groove, and the movable column core is wrapped on the inner side of the fixed column core.

4. A multi-stage transformer core according to claim 3, characterized in that: A horizontally - opened positioning hole is provided at the end of the movable column core. A first fixing hole and a second fixing hole that match the positioning hole are respectively opened in the middle of the first inner sunk - groove part and at the end of the second inner sunk - groove part. The positioning hole and the first fixing hole and the second fixing hole are plugged and fixed through a fixing bolt.

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