A voltage transformer core support device

Abstract

The utility model discloses a voltage transformer iron core support device, including support, ground embedded part and fixed connection on the outer frame of support, the bottom of support is detachably connected with pouring mould, and the outer frame is matched with the peripheral shape of iron core, and is wrapped on the surface of iron core, and ground embedded part is fixedly connected with support and is used for providing the ground connection point. Preferably, the support includes parallelly arranged upper wing board, lower wing board and vertical connection between the web of upper wing board and lower wing board, and the outer frame is fixedly connected on the web, and the number of ground embedded part is multiple, and each ground embedded part is fixedly connected on the upper wing board / lower wing board respectively. The utility model discloses a support, outer frame and ground embedded part are fixedly connected each other as an indivisible rigid whole, so that the iron core forms the stable integral structure with the whole device after being put into the outer frame, thereby realizing the synchronous completion of the quick installation, accurate positioning and reliable earthing of the iron core.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a voltage transformer core support device. Background Technology

[0002] Voltage transformers are key devices used for measurement, protection, and control in power systems. Currently, the industry commonly uses epoxy resin casting to manufacture indoor voltage transformers. This process encapsulates the conductive and magnetic circuit components of the voltage transformer within a cured epoxy resin insulator to achieve the required insulation strength and mechanical protection, ensuring its long-term operational stability and accuracy.

[0003] In existing epoxy resin casting production processes, accurate positioning and reliable fixing of the voltage transformer core are prerequisites for ensuring product performance. Traditional methods generally employ mechanical fixing, specifically using temporary fixtures such as metal clamps to hold and fix the core, then hoisting the entire assembly and suspending it inside the casting mold. During this process, operators must manually adjust the core to ensure it is in the correct position within the mold cavity and that the required insulation distance is maintained.

[0004] However, the clamps are only used during the mold-building stage and must be installed and disassembled separately, increasing the process and time costs. At the same time, the iron core is prone to shifting during hoisting, requiring repeated adjustments to its positioning, which severely reduces production efficiency and quality consistency. Therefore, the existing method suffers from problems such as cumbersome operation, insufficient positioning accuracy, and low production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a voltage transformer core support device to overcome the shortcomings of existing technologies, such as cumbersome operation, insufficient positioning accuracy, and low production efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model discloses a voltage transformer core support device, including a bracket, a grounding insert and an outer frame fixedly connected to the bracket; The bottom of the bracket is detachably connected to the casting mold; The outer frame matches the outer shape of the voltage transformer core and wraps around the surface of the core. The grounding insert is fixedly connected to the bracket and is used to provide a grounding connection point.

[0007] Preferably, the support includes an upper wing plate, a lower wing plate arranged in parallel, and a web plate vertically connected between the upper wing plate and the lower wing plate; The outer frame is fixedly connected to the web plate; There are multiple grounding inserts, and each grounding insert is fixedly connected to the upper wing plate / lower wing plate respectively.

[0008] Preferably, both ends of the upper wing plate and both ends of the lower wing plate are provided with arc-shaped grooves that match the shape of the grounding insert; Each grounding insert is placed in its corresponding arc-shaped groove.

[0009] Preferably, the voltage transformer core support device further includes multiple reinforcing ribs; Each reinforcing rib is fixedly connected to a predetermined position on the upper / lower wing plate.

[0010] Preferably, the bottom of the bracket is provided with a positioning protrusion for cooperating with the casting mold.

[0011] Preferably, the web of the bracket is further provided with a lifting hole, which is used to provide a lifting point for lifting the bracket.

[0012] Preferably, the fixed connection is any one of welding, riveting, or bolting.

[0013] Preferably, the outer frame and the bracket are made of any one of stainless steel, carbon steel or alloy steel.

[0014] Preferably, the grounding insert is a welded bolt insert or a welded internal threaded sleeve insert.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: (1) This utility model connects the bracket, outer frame and grounding insert into an inseparable rigid whole, so that the iron core forms a stable and unified structure with the whole device after being placed in the outer frame. This integrated structure realizes the simultaneous completion of rapid installation, precise positioning and reliable grounding of the iron core. By fixing the bracket to the casting mold, it solves a series of problems such as low mold installation efficiency, easy eccentricity of the iron core and complicated operation in the prior art. (2) This utility model sets an outer frame that matches the shape of the iron core and fixes it to the bracket to form an integral hoisting structure, which enables the iron core to be placed and fixed in the outer frame quickly and accurately, eliminating the tedious process of temporary installation and disassembly of traditional clamps, significantly improving the efficiency of mold assembly, and solving the problem of the iron core deviating due to insecure fixing. (3) This utility model adopts a support structure including a web, an upper wing plate and a lower wing plate, and provides a connection foundation for the outer frame and the web. The outer frame is used to wrap and position the iron core, providing a stable and precise installation foundation for the iron core. (4) By directly fixing multiple grounding inserts to the bracket, this utility model integrates reliable grounding connection points before hoisting and positioning, eliminating the need for the separate process of drilling and tapping holes in the epoxy resin body to install the grounding inserts, simplifying the operation process and improving production efficiency. (5) By setting specific arc grooves on the upper and lower wing plates and placing the cylindrical grounding insert in the arc grooves, this utility model provides a stable and reliable installation and positioning foundation for the grounding insert, ensuring the ease of operation during welding or connection and the structural stability after connection, thereby ensuring the reliability of the grounding connection. (6) By adding reinforcing ribs to the wing plate of the bracket, the strength and rigidity of the key load-bearing parts are significantly improved, ensuring that the device is not easily deformed during long-term use and when subjected to the impact of epoxy resin casting, thereby ensuring the long-term accuracy of the iron core positioning. (7) By setting a positioning protrusion at the bottom of the support, this utility model can quickly and accurately cooperate with the casting mold for positioning, thereby realizing the self-centering and anti-movement of the entire support device in the mold and eliminating the problem of core eccentricity caused by device displacement during the casting process. (8) By setting lifting holes on the web plate, this utility model provides a dedicated force point for overall lifting, making the lifting process more stable and reliable, avoiding structural damage or positional deviation that may be caused by improper lifting, further simplifying the operation and improving safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 Top view showing the fixed connection between the bracket and the grounding insert; Figure 3 A side view showing the fixed connection between the bracket and the grounding insert; Figure 4 A top view of the support frame including the arc-shaped groove and reinforcing ribs; Figure 5 A schematic diagram of the positioning protrusion on the bracket; In the diagram, 1 is the iron core; 2 is the outer frame; 3 is the bracket; 4 is the grounding insert; 5 is the arc groove; 6 is the reinforcing rib; 7 is the upper wing plate; 8 is the lower wing plate; 9 is the positioning protrusion; and 10 is the web plate. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] like Figure 1 As shown, this utility model discloses a voltage transformer core support device, including a bracket 3, a grounding insert 4, and an outer frame 2 fixedly connected to the bracket 3; Preferably, the fixed connection is any one of welding, riveting or bolting.

[0020] The bottom of bracket 3 is detachably connected to the casting mold; Preferred, such as Figure 2 As shown, the support 3 includes an upper wing plate 7 and a lower wing plate 8 arranged in parallel, and a web plate 10 vertically connected between the upper wing plate 7 and the lower wing plate 8. The outer frame 2 is fixedly connected to the web plate 10; In the prior art, the support 3 and the iron core 1 are often set to a separate state and are bundled with steel straps; however, this application uses the outer frame 2, which is fixedly connected to the support 3, to wrap and lock the iron core 1, thereby achieving a permanent and precise integrated positioning of the support device and the iron core 1.

[0021] There are multiple grounding inserts 4, such as Figure 3 As shown, each grounding insert 4 is fixedly connected to the upper wing plate 7 / lower wing plate 8 respectively.

[0022] Preferably, the grounding insert 4 is a welded bolt insert or a welded internal threaded sleeve insert.

[0023] Preferred, such as Figure 4 As shown, both ends of the upper wing plate 7 and both ends of the lower wing plate 8 are provided with arc-shaped grooves 5 that match the shape of the grounding insert 4; This utility model adopts a support structure including an upper wing plate 7, a lower wing plate 8 and a web plate 10, and provides a stable installation foundation for the outer frame 2 and the grounding insert 4, which enhances the overall rigidity and load-bearing stability of the device and effectively prevents the iron core 1 from shifting due to structural deformation during hoisting and pouring.

[0024] Each grounding insert 4 is set in the corresponding arc-shaped groove 5.

[0025] Preferred, such as Figure 2 As shown, each upper wing plate 7 / lower wing plate 8 has a semi-circular arc groove 5 at both ends. The semi-circular arc groove 5 matches the shape and size of the grounding insert 4. This embodiment has a total of four grounding inserts 4 and four semi-circular arc grooves 5.

[0026] Preferably, the voltage transformer core support device further includes multiple reinforcing ribs 6; Each reinforcing rib 6 is fixedly connected to a predetermined position on the upper wing plate 7 / lower wing plate 8.

[0027] The position of reinforcing rib 6 can be determined by those skilled in the art based on the construction conditions, such as... Figure 4 As shown, in one embodiment, as Figure 4 As shown, the present invention has four reinforcing ribs 6, with two reinforcing ribs 6 on each of the upper wing plate 7 and the lower wing plate 8; and the two reinforcing ribs 6 on the upper wing plate 7 / lower wing plate 8 are symmetrically distributed along the longitudinal axis of the web plate 10.

[0028] Preferred, such as Figure 5 As shown, the bottom of the bracket 3 is provided with a positioning protrusion 9 for cooperating with the casting mold.

[0029] Preferably, the web plate 10 of the support 3 is also provided with a lifting hole, which is used to provide a lifting point for the support 3.

[0030] In one embodiment, the bracket 3 is made of Q235 steel and reinforced with ribs 6 to enhance the overall strength and rigidity.

[0031] The outer frame 2 matches the outer shape of the iron core 1 and is wrapped around the surface of the iron core 1; Preferably, the outer frame 2 and the bracket 3 are made of any one of stainless steel, carbon steel or alloy steel.

[0032] The grounding insert 4 is fixedly connected to the bracket 3 to provide a grounding connection point.

[0033] This utility model directly welds the grounding insert 4 onto the bracket 3 made of Q235 steel to provide a reliable grounding connection point and simplify the fixing process.

[0034] In one embodiment, the present invention uses an outer frame 2 made of 304 stainless steel to tightly wrap the periphery of the iron core 1 and directly weld and fix it to the bracket 3 to form a composite structure with strong integrity and precise positioning.

[0035] When using this invention for epoxy resin casting, the specific operation is as follows: S1. The voltage transformer core 1 is precisely placed into the outer frame 2. By utilizing the precise matching characteristics of the outer frame 2 and the core 1, the core 1 can automatically achieve radial centering and circumferential positioning without manual adjustment, thus fundamentally eliminating the initial installation offset of the core 1. S2. Weld the outer frame 2 of the iron core 1 of the voltage transformer to the bracket 3, and weld each grounding insert 4 to the corresponding arc groove 5 on the bracket 3. S3. By connecting the hoisting equipment to the hoisting holes on the web plate 10, the entire support device (including the positioned iron core 1) is lifted smoothly. In this utility model, the overall hoisting method is extremely simple and reliable, avoiding the cumbersome operation of hoisting the iron core 1 and the bracket 3 separately.

[0036] S4. Slowly lower the support device hoisted above the casting mold, so that the positioning protrusion 9 at the bottom of the bracket 3 is precisely embedded in the pre-set positioning groove inside the mold. This step ensures the absolute centering of the entire device in the casting mold cavity through mechanical hard positioning, laying the foundation for the precise and non-shifting position of the iron core 1 in the final product.

[0037] S5. Connect the grounding wire of the external device directly to the grounding insert 4 that has been pre-welded on the bracket 3. This step utilizes the pre-integrated ground connection point, eliminating the complicated process of drilling and tapping on the cured resin body. The operation is extremely simple and fast, and the electrical reliability and mechanical stability of the welded connection are far superior to the terminals installed later.

[0038] S6. After completing the above positioning and connection, the epoxy resin pouring operation can be carried out. During this process, the integral rigid composite structure welded from the bracket 3, outer frame 2, and grounding insert 4 can effectively resist the fluid impact force during resin pouring, ensuring that the iron core 1 will not move during the curing process, thus guaranteeing the structural stability of the final product. The resin will fill all the spaces between the iron core 1, outer frame 2, bracket 3, and mold until it is completely cured and demolded.

[0039] S7. After demolding, the bracket 3, outer frame 2, and grounding insert 4, as functional structural components, are permanently encapsulated and fixed within the epoxy resin insulator, forming the final voltage transformer product. This device is not only a positioning tooling in the production process, but also a permanent component of the product body that enhances mechanical strength, ensures grounding reliability, and maintains the lifelong stable position of the core 1 without deviation.

[0040] This invention has a simple structure and low cost, and can be widely used in the hoisting and positioning of the iron core 1 of voltage transformers. It effectively solves the shortcomings of traditional methods and improves production efficiency and product quality.

Claims

1. A voltage transformer core support device, characterized in that, Includes a bracket, a grounding insert, and an outer frame fixedly connected to the bracket; The bottom of the bracket is detachably connected to the casting mold; The outer frame matches the outer shape of the voltage transformer core and wraps around the surface of the core. The grounding insert is fixedly connected to the bracket and is used to provide a grounding connection point.

2. The voltage transformer core support device according to claim 1, characterized in that, The support includes an upper wing plate and a lower wing plate arranged in parallel, and a web plate vertically connected between the upper wing plate and the lower wing plate; The outer frame is fixedly connected to the web plate; There are multiple grounding inserts, and each grounding insert is fixedly connected to the upper wing plate / lower wing plate respectively.

3. The voltage transformer core support device according to claim 2, characterized in that, Both ends of the upper wing plate and both ends of the lower wing plate are provided with arc-shaped grooves that match the shape of the grounding insert; Each grounding insert is placed in its corresponding arc-shaped groove.

4. The voltage transformer core support device according to claim 2, characterized in that, It also includes multiple reinforcing ribs; Each reinforcing rib is fixedly connected to a predetermined position on the upper / lower wing plate.

5. The voltage transformer core support device according to claim 1, characterized in that, The bottom of the bracket is provided with a positioning protrusion for engaging with the casting mold.

6. The voltage transformer core support device according to claim 2, characterized in that, The web of the support is also provided with a lifting hole, which is used to provide a lifting point for lifting the support.

7. The voltage transformer core support device according to claim 1, characterized in that, The fixed connection can be any one of welding, riveting, or bolting.

8. The voltage transformer core support device according to claim 1, characterized in that, The outer frame and the bracket are made of any one of stainless steel, carbon steel or alloy steel.

9. The voltage transformer core support device according to claim 1, characterized in that, The grounding insert is a welded bolt insert or a welded internal threaded sleeve insert.

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