Electromagnetic isolation protection device for a transformer

Abstract

The utility model discloses electromagnetic isolation protection device of transformer relates to transformer technical field. The utility model discloses a transformer shell, variable pressure subassembly, fixed strip and support frame are included, and the steel mesh is fixed with inlaying on the inner wall of transformer shell, and the fixed strip is fixed with symmetry in the bottom of transformer shell, and the variable pressure subassembly is fixed with in the bottom center of transformer shell, and the variable pressure subassembly includes support frame and annular core, and support frame is fixed in the bottom of transformer shell, and the top equal interval fixed of support frame has annular core, and the bottom symmetry of transformer shell has support frame. The utility model discloses a transformer shell, variable pressure subassembly, fixed strip and support frame are set up, and the problem that the electromagnetic isolation protection device of transformer has no grounding effect, influences electromagnetic protection stability, and the isolation support between iron core is not enough stable is solved, and the advantage of the electromagnetic isolation protection device of this transformer is: isolation protection can ground, and the isolation support between iron core is more stable.

Description

Technical Field

[0001] This utility model belongs to the field of transformer technology, and in particular relates to an electromagnetic isolation protection device for transformers. Background Technology

[0002] A transformer is essentially a natural electromagnetic isolation device based on the principle of electromagnetic induction. Its core function is to achieve electrical isolation and energy transfer between the primary and secondary circuits through magnetic coupling. This inherent characteristic provides crucial safety protection: firstly, it prevents electric shock to personnel because the secondary circuit cannot form a loop with the ground; secondly, it suppresses common-mode interference from the power grid and improves electromagnetic compatibility. To further enhance isolation effectiveness and reliability, transformers often have multiple built-in or external protective devices. However, the electromagnetic isolation protection devices of transformers still have the following drawbacks in practical use: When the electromagnetic isolation protection device of the transformer is in operation, it directly isolates the transformer from the external electromagnetic field. However, during operation, the isolation protection structure only provides isolation protection and does not have a grounding function, which affects the stability of the electromagnetic protection. Secondly, during the operation of the electromagnetic isolation protection device of the transformer, the adjacent iron cores need to be isolated. During the isolation process, due to the production process, a stable support needs to be installed inside the transformer. In the isolation setup, the isolation support between the iron cores is not stable enough, which affects the stability of the operation. Utility Model Content

[0003] The purpose of this utility model is to provide an electromagnetic isolation protection device for transformers. By setting up a transformer shell, transformer components, fixing strips and support frame, it solves the problems of the lack of grounding function in the electromagnetic isolation protection device of the transformer, which affects the stability of electromagnetic protection, and the insufficient stability of the isolation support between the iron cores.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is an electromagnetic isolation and protection device for a transformer, including a transformer shell, a transformer assembly, fixing strips, and a support frame. A steel mesh is embedded and fixed on the inner wall of the transformer shell. Fixing strips are symmetrically fixed on the inner bottom of the transformer shell. The transformer assembly is fixed in the center of the inner bottom of the transformer shell. The transformer assembly includes a support frame and annular iron cores. The support frame is fixed to the bottom of the transformer shell, and annular iron cores are fixed at equal intervals on the top of the support frame. Support frames are symmetrically fixed on the bottom of the transformer shell. The steel mesh embedded inside the transformer shell provides electromagnetic shielding. Fixing strips are symmetrically installed on its inner bottom for fixing and grounding. The transformer assembly, including the support frame and the annular iron cores distributed at equal intervals on the top, is located in the center for magnetic field transmission and support. The support frame is installed on the bottom of the shell for overall fixation and support.

[0005] Furthermore, a fixing groove is provided at the two long edges of the lower part of the inner wall of the transformer shell, and the fixing strip is fixed in the fixing groove. The fixing groove is provided at the lower edge of the inner wall of the transformer shell to embed and fix the fixing strip, thereby improving the structural stability.

[0006] Furthermore, the top of the fixing strip is provided with several mounting grooves at equal intervals, and the bottom of the steel mesh is fixed in the mounting grooves at the two long sides near the bottom of the transformer shell. The top of the fixing strip is provided with a series of mounting grooves for fixing the bottom edge of the steel mesh and simultaneously realizing the electrical grounding of the steel mesh.

[0007] Furthermore, a grounding rod is fixed at one long side of the bottom of each fixing strip. The grounding rod is installed through the bottom of the transformer housing at the bottom of the fixing strip. The bottom of the support frame is symmetrically provided with mounting holes. Each fixing strip is equipped with a grounding rod at the bottom, which passes through the housing and connects to the external grounding structure. The bottom of the support frame is provided with mounting holes for fixing to the external bracket with bolts, so as to achieve the grounding and installation functions together.

[0008] Furthermore, the transformer assembly also includes insulating partitions. Insulating partitions are fixed at the two vertical edges between adjacent annular cores. The insulating partitions extend from the lower part between the annular cores and are fixed to the end of the support frame. The bottom ends of all the insulating partitions are fixed to the inner bottom of the transformer housing. In the transformer assembly, insulating partitions are set between adjacent annular cores to achieve insulation isolation between the cores. At the same time, the support frame strengthens the structural fixation and ensures operational stability.

[0009] Furthermore, the transformer assembly also includes coil assemblies and external cables. All the toroidal iron cores form a loop structure and are vertically arranged. The two vertical parts of the loop structure formed by all the toroidal iron cores are movably connected to coil assemblies. The coil assemblies are fixed on the inner wall of the transformer casing. The positive and negative poles of the two coil assemblies are fixed and electrically connected to external cables. The two external cables are fixed through and pass through the transformer casing. The toroidal iron cores together form a closed magnetic circuit. Coil assemblies are installed on both sides and connected to external cables for the input and output of electrical energy, realizing the transformer transmission function.

[0010] This utility model has the following beneficial effects: This invention solves the problem of the lack of grounding in the electromagnetic isolation protection device of the transformer, which affects the stability of electromagnetic protection, by setting up a transformer shell, transformer assembly, fixing strip, and support frame. After the transformer shell is supported on the working plane by the support frame, the installation bolts are inserted into the mounting holes and screwed into the external mounting bracket. After installation, the transformer shell is installed behind the transformer shell. During operation, the transformer shell is electromagnetically shielded by the steel mesh, and the current induced in the steel mesh is transmitted to the external grounding structure through the grounding rod to conduct the current out, preventing electromagnetic interference during operation and better ensuring the stability of electromagnetic isolation protection.

[0011] This invention solves the problem of insufficient stability in the isolation support between the iron cores of the electromagnetic isolation protection device of the transformer by setting up the transformer shell and the transformer assembly. When transmitting power through the coil assembly and the toroidal iron core, the toroidal iron core is insulated by the insulating partitions therein. The toroidal iron core is supported in the transformer shell by the insulating partitions and the support frame. The toroidal iron cores are well insulated from each other and supported at the bottom of the transformer shell by the support frame, which ensures that the toroidal iron cores can be well isolated from each other during operation, making the isolation support of the iron core more stable during operation. 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 This is a three-dimensional view of the electromagnetic isolation protection device of a transformer after it has been cut open. Figure 2 This is a three-dimensional view of the transformer casing after it has been cut open. Figure 3 This is a three-dimensional structural view of the transformer assembly; Figure 4 This is a three-dimensional structural diagram of the fixing strip; Figure 5 This is a three-dimensional structural diagram of the support frame; Figure 6 This is a three-dimensional diagram of the assembly structure of the electromagnetic isolation protection device for a transformer.

[0014] Figure label: 1. Transformer casing; 101. Fixing groove; 102. Reinforcing mesh; 2. Transformer assembly; 201. Support frame; 202. Annular core; 203. Insulating partition; 204. Coil assembly; 205. External cable; 3. Fixing strip; 301. Mounting groove; 302. Grounding rod; 4. Support frame; 401. Mounting hole. 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 1-6 This utility model is an electromagnetic isolation and protection device for a transformer, including a transformer shell 1, a transformer assembly 2, fixing bars 3, and a support frame 4. A steel mesh 102 is embedded and fixed on the inner wall of the transformer shell 1. The transformer shell 1 encloses the transformer assembly 2, fixing bars 3, and support frame 4 within it. The steel mesh 102 provides electromagnetic shielding during operation. Fixing bars 3 are symmetrically fixed at the bottom inner side of the transformer shell 1. During operation, the fixing bars 3 ground the steel mesh 102. The transformer assembly 2 is fixed at the center of the bottom inner side of the transformer shell 1. The transformer assembly 2 includes a support frame 201 and an annular iron core 202. The support frame 201 is fixed at the bottom of the transformer shell 1. The annular iron core 202 is fixed at equal intervals at the top of the support frame 201. The annular iron core 202 is supported and installed in the transformer shell 1 through the support frame 201. The annular iron core 202 transmits the magnetic field of the coil assembly 204. The support frame 4 is symmetrically fixed at the bottom of the transformer shell 1. The support frame 4 supports the transformer shell 1 on an external support structure.

[0017] Specifically, a fixing groove 101 is provided at the two long edges of the lower part of the inner wall of the transformer housing 1, and the fixing strip 3 is fixed in the fixing groove 101. The fixing strip 3 is fixed in the fixing groove 101.

[0018] Furthermore, the top of the fixing strip 3 is provided with several mounting slots 301 at equal intervals. The bottom of the steel mesh 102 is fixed in the mounting slots 301 at the two long sides near the bottom of the transformer shell 1. The fixing strip 3 fixes the steel mesh 102 through the mounting slots 301, so that the steel mesh 102 can be connected to electricity.

[0019] Furthermore, a grounding rod 302 is fixed at one long side of the bottom of each fixing strip 3. The grounding rod 302 is installed through the bottom of the transformer shell 1 at the bottom of the fixing strip 3. The bottom of the support frame 4 is symmetrically provided with mounting holes 401. The bottom end of the grounding rod 302 is connected to the external grounding electrode or grounding grid. The grounding rod 302 at the bottom of the two fixing strips 3 is grounded to the ground, so that the steel mesh 102 is grounded during operation.

[0020] The operation process of this embodiment is as follows: During operation, after the transformer shell 1 is supported and set on the working plane by the support frame 4, the installation bolts are inserted into the mounting holes 401 and then screwed into the external mounting bracket. After the transformer shell 1 is installed, the transformer shell 1 is electromagnetically shielded by the steel mesh 102. The current induced on the steel mesh 102 is transmitted to the external grounding structure through the grounding rod 302 to conduct the current out and prevent electromagnetic interference during operation. Specific Implementation Example 2

[0021] Please see Figure 1 , 2 Based on the specific embodiment 1, the transformer assembly 2 further includes an insulating partition 203. An insulating partition 203 is fixed at each of the two vertical edges between adjacent annular iron cores 202. The insulating partitions 203 extend from the lower part between the annular iron cores 202 and are fixed to the end of the support frame 201. The bottom ends of all the insulating partitions 203 are fixed to the inner bottom of the transformer housing 1. When the transformer assembly 2 is working, the insulating partitions 203 insulate and separate the two adjacent annular iron cores 202. The support frame 201 further connects and restricts the annular iron cores 202. All the annular iron cores 202 together form a closed magnetic circuit.

[0022] Specifically, the transformer assembly 2 also includes a coil assembly 204 and an external cable 205 (the coil assembly 204 typically uses an internally wrapped coil, with the coil covered with insulating material to prevent leakage current during operation). All the toroidal cores 202 form a loop structure and are vertically arranged. The coil assembly 204 is movably connected to the outer side of the two vertical parts of the loop structure formed by all the toroidal cores 202. The coil assembly 204 is fixed to the inner wall of the transformer casing 1. The positive and negative terminals of the two coil assemblies 204 are fixed and electrically connected to the external cable 205. All 205 are fixed and pass through the transformer housing 1. The transformer assembly 2 transmits power through the coil assembly 204. The end of the external cable 205 away from the coil assembly 204 is connected to the power transmission equipment. During operation, the external cable 205 transmits external power to the external cable 205, which is then transmitted to one coil assembly 204. After the magnetic field is transmitted through the toroidal iron core 202, it is transmitted to another coil assembly 204, and then to another external cable 205. Power is then output through the external cable 205.

[0023] The operation process of this embodiment is as follows: During operation, when power is transmitted through the coil assembly 204 and the toroidal core 202, the toroidal core 202 is insulated by the insulating partition 203 therein. The toroidal core 202 is supported in the transformer housing 1 by the insulating partition 203 and the support frame 201. The toroidal cores 202 are well insulated from each other and supported at the bottom of the transformer housing 1 by the support frame 201, ensuring that the toroidal cores 202 can be well separated during operation.

[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. An electromagnetic isolation protection device for a transformer, comprising a transformer casing (1), a transformer assembly (2), a fixing strip (3), and a support frame (4), characterized in that: A steel mesh (102) is embedded and fixed on the inner wall of the transformer shell (1). Fixing strips (3) are symmetrically fixed on the inner bottom of the transformer shell (1). A transformer assembly (2) is fixed in the center of the inner bottom of the transformer shell (1). The transformer assembly (2) includes a support frame (201) and an annular iron core (202). The support frame (201) is fixed at the bottom of the transformer shell (1). Annular iron cores (202) are fixed at equal intervals on the top of the support frame (201). A support frame (4) is symmetrically fixed on the bottom of the transformer shell (1).

2. The electromagnetic isolation protection device for a transformer according to claim 1, characterized in that: The transformer housing (1) has a fixing groove (101) at the lower two long edges of the inner wall, and the fixing strip (3) is fixed in the fixing groove (101).

3. The electromagnetic isolation protection device for a transformer according to claim 2, characterized in that: The top of the fixing strip (3) is provided with several installation slots (301) at equal intervals, and the bottom of the steel mesh (102) is fixed in the installation slots (301) near the two long sides of the bottom of the transformer shell (1).

4. The electromagnetic isolation protection device for a transformer according to claim 3, characterized in that: A grounding rod (302) is fixed at one long side of the bottom of each of the fixing bars (3). The grounding rod (302) is installed through the bottom of the transformer housing (1) at the bottom of the fixing bar (3). The bottom of the support frame (4) is symmetrically provided with mounting holes (401).

5. The electromagnetic isolation protection device for a transformer according to claim 1, characterized in that: The transformer assembly (2) also includes an insulating partition (203). An insulating partition (203) is fixed at each of the two vertical edges between adjacent annular iron cores (202). The insulating partitions (203) extend out of the lower part between the annular iron cores (202) and are fixed at the end of the support frame (201). The bottom of all the insulating partitions (203) is fixed to the inner bottom of the transformer housing (1).

6. The electromagnetic isolation protection device for a transformer according to claim 1, characterized in that: The transformer assembly (2) also includes a coil assembly (204) and an external cable (205). All the toroidal iron cores (202) form a loop structure and are vertically arranged. The two vertical parts of the loop structure formed by all the toroidal iron cores (202) are movably connected to the coil assembly (204). The coil assembly (204) is fixed on the inner wall of the transformer housing (1). The positive and negative poles of the two coil assemblies (204) are fixed and electrically connected to the external cable (205). The two external cables (205) are fixed through and pass through the transformer housing (1).

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