Transformer teaching demonstration device

Abstract

The utility model discloses a transformer teaching demonstration device which comprises a transparent housing box body. An iron core assembly and a winding assembly are detachably arranged in the transparent shell box body; the iron core assembly comprises a plurality of iron core units, the iron core units form an iron core column in the vertical direction after being assembled, and the winding assembly is arranged on the iron core column in a sleeving mode; adjusting holes are evenly formed in the outer side surface of each iron core unit in the circumferential direction and penetrate through the iron core units, the winding assembly comprises a winding frame and a winding coil arranged on the outer side of the winding frame in a sleeving mode, and a deformation locking mechanism is arranged on the winding frame and used for fixing the current shape when the shape of the winding assembly is changed. According to the utility model, on one hand, a learner can visually understand the internal structure of the transformer, and on the other hand, various actual operation conditions can be simulated in teaching, thereby helping the learner to comprehensively understand the complex principle of the transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer teaching technology, and in particular to a transformer teaching demonstration device. Background Technology

[0002] Transformers have a complex internal structure, numerous functional components, and a large size. Learners who want to fully understand the physical structure and working principles of each component often need to use transformer teaching demonstration devices, which are usually made by scaling down a real transformer to a certain proportion.

[0003] However, existing transformer teaching demonstration devices have some limitations in actual teaching. In these devices, the number of turns in the core is usually fixed. This makes it difficult for instructors to visually demonstrate the impact of the number of core turns on transformer performance (such as voltage ratio and electromagnetic induction intensity). Learners can only understand the role of core turns in the transformer's working principle through theoretical calculations and formula derivations, lacking opportunities for practical operation and direct observation. Furthermore, existing transformer demonstration devices often use fixed winding shapes, typically standard circles or specific shapes wound on the core. However, in reality, the shape of transformer windings may vary due to design requirements (such as space constraints or special electromagnetic environments) in different engineering applications. Even during operation, transformer windings may deform and fail. Different winding shapes significantly affect the transformer's magnetic field distribution, inductance, coupling efficiency, and other performance indicators. The fixed winding structure in existing devices limits the teaching demonstration of the impact of different winding shapes on transformer performance. The lack of corresponding visual demonstration tools makes it difficult for learners to understand the effects of changes in winding shape. In summary, existing transformer demonstration devices are limited to theoretical knowledge and simple ideal situations, which are out of touch with the complex situations in actual engineering applications. This is not conducive to cultivating learners' ability to solve practical problems. Learners or observers cannot intuitively understand the internal structure of the transformer, resulting in poor teaching effectiveness and learners' inadequate understanding of the complex principles of transformers. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a transformer teaching demonstration device. By designing a transparent outer shell and arranging an adjustable-turn core assembly and a deformable winding assembly inside the transparent outer shell, learners can intuitively understand the internal structure of the transformer. On the other hand, it can simulate various actual operating conditions during teaching, helping learners to fully understand the complex principles of transformers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A transformer teaching demonstration device includes: a transparent outer casing;

[0007] The transparent outer casing houses a detachable core assembly and a winding assembly. The core assembly comprises several core units, which are assembled to form a core column in the vertical direction. The winding assembly is fitted onto the core column. Each core unit has evenly spaced adjustment holes along its outer circumference on its outer surface. The adjustment holes penetrate the core unit and are threaded inside. Multiple core units can be vertically and detachably stacked using screws that match the threads.

[0008] The winding assembly includes a winding frame and a winding coil sleeved on the outside of the winding frame. The winding frame is provided with a deformation locking mechanism to fix the current shape when the shape of the winding assembly is changed.

[0009] As a further technical solution, each core unit has a protruding tooth on one side edge, and a groove matching the protruding tooth is provided on the side of the core unit away from the protruding tooth. Two adjacent core units are spliced ​​together by the protruding tooth and the groove. Each core unit is a ring structure, and the surface of the core unit is coated with insulating varnish.

[0010] As a further technical solution, the protrusions and grooves on the core unit are both trapezoidal in shape, and magnetic rubber strips are provided on the contact surfaces of the protrusions and grooves.

[0011] As a further technical solution, the winding frame is a ring structure, and the outer surface of the winding frame has multiple concave tracks along the circumferential direction for accommodating and guiding the coil. Multiple connection points are evenly distributed on the concave tracks, and the connection points are made of metal.

[0012] As a further technical solution, an elastic clamping device is provided inside the connection point to firmly clamp the winding coil.

[0013] As a further technical solution, the deformation locking mechanism includes a movable locking pin and a positioning hole. The outer side of the winding frame is provided with a number of guide grooves, and the locking pin is slidably disposed in each guide groove. The inner side of the winding frame is provided with a positioning hole that matches the locking pin.

[0014] As a further technical solution, an oil reservoir is detachably connected to one side of the transparent outer casing, and a cooler is detachably connected to the side of the transparent outer casing away from the oil reservoir.

[0015] As a further technical solution, the transparent outer casing has multiple sets of transformer bushing connection interfaces and oil circuit pipeline connection interfaces.

[0016] As a further technical solution, the cooler includes a fan, heat sinks, and oil circuit pipes. Multiple sets of heat sinks are arranged in an array. The oil circuit pipes meander through the array of heat sinks and are connected to the heat sinks by clips. Multiple fans are provided, and the air outlet of each fan is directly facing the heat sink.

[0017] As a further technical solution, the oil conservator includes a modular housing and an oil conservator capsule and an oil level gauge disposed inside the modular housing.

[0018] One or more technical solutions of this utility model have the following beneficial effects:

[0019] (1) The core assembly in this utility model is composed of several core units spliced ​​together, and adjustment holes are evenly opened along the circumferential direction on the outer surface of each core unit. In this way, multiple core units can be vertically detached and stacked with the help of threads and screws, so that the number of turns of the core assembly can be adjusted according to the teaching content. Through the design of adjustable core turns, the instructor can easily change the number of core turns during teaching, and then let the learners observe the changes in transformer input and output voltage, current and other parameters, making the abstract theory more intuitive and easy to understand. The learners can see the relationship between the number of core turns and the voltage ratio, and deepen their understanding of the transformer transformation principle.

[0020] (2) This utility model incorporates a deformation locking mechanism on the winding frame of the winding assembly to fix the current shape when the shape of the winding assembly is changed. The deformable winding design allows teachers to adjust the winding to different shapes (such as circles, ellipses, rectangles, etc.) and then demonstrate the magnetic field distribution of the transformer under different shapes. Using magnetic field visualization teaching aids (such as iron powder or magnetic field sensors), students can observe the density and direction changes of the magnetic field around windings of different shapes, thereby understanding the influence of winding shape on magnetic field distribution. Learners can better combine theoretical knowledge with practical applications, cultivate their ability to design and analyze transformers in complex engineering environments, and improve their overall quality. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 This is a schematic diagram of the structure of the transformer teaching demonstration device of this utility model;

[0023] The components include: 1. Transparent outer casing; 2. Winding assembly; 3. Cooler; 4. Medium-voltage bushing; 5. Low-voltage bushing; 6. High-voltage bushing; 7. Neutral point bushing; 8. Oil conservator; 9. High-voltage output device. Detailed Implementation

[0024] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] Example 1

[0026] This utility model provides a transformer teaching demonstration device, such as... Figure 1 As shown, the transformer teaching demonstration device includes a transparent outer casing 1, which allows learners to visually observe the internal structure of the transformer. The core assembly and winding assembly 2 are detachably installed inside the transparent outer casing 1. In this embodiment, the core assembly of the transformer teaching demonstration device is essentially an adjustable-turn core assembly. Specifically, the core assembly includes several core units, each composed of several stacked silicon steel sheets. These core units are assembled to form a core column in the vertical direction. The winding assembly is fitted onto the core column. Each core unit has evenly spaced adjustment holes along its outer circumference on its outer surface. These adjustment holes penetrate the core unit and are threaded inside. Multiple core units can be vertically and detachably stacked using screws that match the threads. When the number of core turns needs to be increased, more core units are simply assembled, and the adjustment screws are screwed into the adjustment holes to secure them tightly. Conversely, to reduce the number of core turns, the corresponding adjustment screws are unscrewed, and the excess core units are removed. In this embodiment, the adjustable-turns core assembly enhances the intuitiveness of teaching. The adjustable core turns design allows instructors to easily change the number of turns during instruction, enabling learners to observe changes in transformer input and output voltage, current, and other parameters, making abstract theories more intuitive and understandable. Learners can visually observe the relationship between the number of core turns and the voltage ratio, deepening their understanding of transformer transformation principles and facilitating in-depth explanations of transformer design principles and performance optimization. Instructors can set up different core turn count scenarios. For example, with fewer core turns, they can demonstrate changes in the transformer's excitation current, core saturation, and their impact on the output voltage waveform; with more core turns, they can explain how to improve the transformer's voltage transformation capability and its impact on short-circuit impedance. This broadens learners' knowledge, allowing them to understand the importance of core turns in transformer design and operation, and cultivating their abilities in transformer design and fault analysis.

[0027] In this embodiment, each core unit is a ring structure, and its surface is coated with insulating varnish. This serves two purposes: preventing eddy currents from forming between the core units and preventing corrosion. Each core unit has protruding teeth on one edge, and a matching groove on the side away from the teeth. Adjacent core units are joined together via the teeth and groove. Both the teeth and grooves on the core units are trapezoidal in shape, ensuring a tight fit and accurate positioning during assembly. Tiny magnetic adsorption devices, such as magnetic rubber strips, are placed on the contact surfaces of the teeth and grooves to further enhance connection stability and prevent accidental separation of the core units during teaching demonstrations, which could affect teaching effectiveness and progress.

[0028] In this embodiment, the winding assembly 2 includes a winding frame and a winding coil sleeved on the outside of the winding frame. The winding assembly 2 is essentially a deformable winding assembly. The winding frame is made of a high-strength, high-flexibility composite material that is easily deformable, such as a mixture of carbon fiber reinforced plastic and rubber. This material has sufficient mechanical strength to support the winding coil while also being able to bend and deform to a certain extent without damage. Specifically, the winding frame is equipped with a deformation locking mechanism to fix the current shape when the shape of the winding assembly is changed. The winding frame has a ring structure, and the inner diameter of the winding frame is slightly larger than the diameter of the iron core column, so that the two fit together perfectly, ensuring that the winding frame can be tightly sleeved on the iron core column. Multiple concave tracks are formed along the circumference of the outer surface of the winding frame to accommodate and guide the winding coil. Multiple connection points are evenly distributed on the concave tracks. The connection points are made of metal with good conductivity, and elastic clamping devices are provided inside the connection points to firmly clamp the winding coil without damaging it. In this embodiment, a deformation locking mechanism is designed to maintain the shape of the winding assembly after changes. This mechanism includes a movable locking pin and positioning holes. Specifically, several guide grooves are provided on the outer side of the winding frame, with a locking pin slidably positioned in each groove. Positioning holes matching the locking pins are provided on the inner side of the winding frame. When the winding assembly is adjusted to the desired shape, the locking pin is moved to insert into the corresponding positioning hole, thereby fixing the winding frame in the current shape. The distribution of the positioning holes is designed based on common winding deformation shapes (such as circles, ellipses, rectangles, etc.) to meet different teaching demonstration needs. The design of the deformable winding assembly allows the instructor to adjust the winding to different shapes (such as circles, ellipses, rectangles, etc.) and then demonstrate the magnetic field distribution of the transformer under different shapes. Using magnetic field visualization teaching aids (such as iron powder or magnetic field sensors), learners can observe the density and direction changes of the magnetic field around windings of different shapes, thereby understanding the influence of winding shape on magnetic field distribution. Meanwhile, by measuring parameters such as inductance and coupling coefficient of transformers with different winding shapes, learners can intuitively understand how the winding shape affects the electrical performance of the transformer, deepen their understanding of the application of the electromagnetic induction principle under different geometric shapes, and improve their overall quality.

[0029] In this embodiment, as Figure 1As shown, an oil conservator 8 is detachably connected to one side of the transparent outer casing 1. A cooler 3 is detachably connected to the side of the transparent outer casing 1 away from the oil conservator 8. The cooler 3 includes a fan, heat sinks, and oil circuit pipes. Multiple sets of heat sinks are arranged in an array. The oil circuit pipes meander through the array of heat sinks and are connected to the heat sinks by clips. They can be disassembled and removed individually to demonstrate the components and working principle of the transformer's heat dissipation circuit. Multiple fans are provided, with the air outlet of each fan facing the heat sink. The oil conservator includes a modular outer casing and an oil conservator capsule and oil level gauge installed inside the modular outer casing. It is used to demonstrate the thermal expansion and contraction of transformer oil and the working principle of the oil conservator's breathing mechanism.

[0030] In this embodiment, the transparent outer casing 1 has multiple sets of transformer bushing connection interfaces and oil circuit pipe connection interfaces. The oil circuit pipe connection interfaces are connected to the oil circuit pipes in the cooler. The multiple sets of transformer bushing connection interfaces include medium-voltage bushing connection interfaces, low-voltage bushing connection interfaces, high-voltage bushing connection interfaces, and neutral point bushing connection interfaces, which are respectively connected to medium-voltage bushings 4, low-voltage bushings 5, high-voltage bushings 6, and neutral point bushings 7. The transparent outer casing 1 is also equipped with a high-voltage output device 9, and the high-voltage output is connected to the high-voltage bushing 6 through the high-voltage output device 9.

[0031] Compared to traditional model demonstrations, this invention can visualize complex components of a transformer, such as its cooler, oil conservator, winding assembly, core assembly, outgoing line device, and bushings. It provides a more intuitive and clear demonstration of the transformer's structure and relative positions, allowing learners to gain a more intuitive and in-depth understanding of this important electrical device.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A transformer teaching demonstration device, characterized in that, include: Transparent outer casing; The transparent outer casing houses a detachable core assembly and a winding assembly. The core assembly comprises several core units, which are assembled to form a core column in the vertical direction. The winding assembly is fitted onto the core column. Each core unit has evenly spaced adjustment holes along its outer circumference on its outer surface. The adjustment holes penetrate the core unit and are threaded inside. Multiple core units can be vertically and detachably stacked using screws that match the threads. The winding assembly includes a winding frame and a winding coil sleeved on the outside of the winding frame. The winding frame is provided with a deformation locking mechanism to fix the current shape when the shape of the winding assembly is changed.

2. The transformer teaching demonstration device as described in claim 1, characterized in that, Each core unit has a toothed edge on one side, and a groove matching the toothed edge on the side of the core unit away from the toothed edge. Two adjacent core units are joined together by the toothed edge and the groove. Each core unit is a ring structure, and the surface of the core unit is coated with insulating varnish.

3. The transformer teaching demonstration device as described in claim 2, characterized in that, The protrusions and grooves on the core unit are trapezoidal in shape, and magnetic rubber strips are provided on the contact surfaces of the protrusions and grooves.

4. The transformer teaching demonstration device as described in claim 1, characterized in that, The winding frame is a ring structure, and multiple concave tracks are opened along the circumferential direction on the outer surface of the winding frame to accommodate and guide the coil. Multiple connection points are evenly distributed on the concave tracks, and the connection points are made of metal.

5. The transformer teaching demonstration device as described in claim 4, characterized in that, The connection point is equipped with an elastic clamping device to securely clamp the winding coil.

6. The transformer teaching demonstration device as described in claim 1, characterized in that, The deformation locking mechanism includes a movable locking pin and a positioning hole. The outer side of the winding frame is provided with several guide grooves, and the locking pin is slidably disposed in each guide groove. The inner side of the winding frame is provided with a positioning hole that matches the locking pin.

7. The transformer teaching demonstration device as described in claim 1, characterized in that, An oil reservoir is detachably connected to one side of the transparent outer casing, and a cooler is detachably connected to the side of the transparent outer casing away from the oil reservoir.

8. The transformer teaching demonstration device as described in claim 7, characterized in that, The transparent outer casing has multiple sets of transformer bushing connection interfaces and oil circuit pipeline connection interfaces.

9. A transformer teaching demonstration device as described in claim 7, characterized in that, The cooler includes a fan, heat sinks, and oil circuit pipes. Multiple heat sinks are arranged in an array. The oil circuit pipes meander through the array of heat sinks and are connected to the heat sinks by clips. Multiple fans are provided, and the air outlet of each fan is directly facing the heat sink.

10. A transformer teaching demonstration device as described in claim 7, characterized in that, The oil conservator includes a modular housing and an oil conservator capsule and an oil level gauge disposed inside the modular housing.

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