A single-phase planar core clamp structure

Abstract

The utility model relates to the technical field of core clamp spare, disclose a single -phase plane core clamp spare structure, including upper clamp spare, lower clamp spare and fastener, the upper clamp spare includes first body and two first clamping parts that bend from the first body both sides to the direction of core, and the end of each first clamping part is equipped with the connecting portion of reverse bending, and the connecting portion is equipped with the mounting hole, the lower clamp spare includes second body and two second clamping parts that bend from the second body both sides to the direction of core, the upper clamp spare and lower clamp spare are clamped together through fastener core. The connecting portion and the upper clamp spare are integrally formed, simple structure, no spare part, avoid the complicated step such as welding, punching, realize fast, convenient assembly at the same time, also reduce material waste, reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the technical field of iron core clamps, and in particular to a single-phase planar iron core clamp structure. Background Technology

[0002] Single-phase planar cores are widely used in the manufacture of small-capacity pole-mounted distribution transformers, especially suitable for scenarios with sparsely distributed power grid users. This type of core is typically formed using bending or winding processes. Its clamping components are key structural parts that integrate structural fixation, mechanical load-bearing, insulation isolation, and installation, directly affecting the transformer's mechanical strength, reliable safe operation, and ease and cost of production. However, current designs for these core clamping components often suffer from redundancy.

[0003] See Figure 1 Traditional single-phase planar iron core clamping structures include a first clamp, a second clamp, and a tie rod. Lifting lugs are bolted to the upper clamp, and the two ends of the tie rod are bolted to the first and second clamps respectively. The tie rod applies tension to the first and second clamps, allowing them to clamp the iron core. However, to accommodate the installation of the lifting lugs, the clamps often require machining of auxiliary structures such as holes and slots, increasing material and labor costs.

[0004] It is evident that the existing clamping structure design is redundant, leading to increased manufacturing costs and inconvenient assembly and disassembly, and urgently needs optimization. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a single-phase planar iron core clamping structure to solve one or more problems in the prior art.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A single-phase planar iron core clamping structure includes an upper clamping member, a lower clamping member, and fasteners. The upper clamping member and the lower clamping member are fixed together by the fasteners. The upper clamping member includes a first body and two first clamping portions bent from both sides of the first body toward the iron core. The first clamping portions are provided with free ends, which are located at the ends of the first clamping portions along the length direction of the first body. The free ends are bent in the opposite direction to the bending direction of the first clamping portions to form a connecting portion. The connecting portion has a mounting hole. The lower clamping member includes a second body and two second clamping portions bent from both sides of the second body toward the iron core.

[0007] With the above solution, both the upper and lower clamps are manufactured using an integral bending process. The connecting part and the upper clamp are integrally formed, resulting in a simple structure with no redundant design, which facilitates assembly and disassembly.

[0008] Furthermore, each of the first clamping parts has a free end, and the free ends of the two first clamping parts are distributed diagonally.

[0009] The above solution reduces the manufacturing difficulty and cost of the upper clamp while ensuring that the connection part has good load-bearing capacity for lighter iron cores.

[0010] Furthermore, each of the first clamping parts is provided with two free ends, which are located at both ends of the first clamping part.

[0011] The above solution increases the load-bearing capacity of the connection part for heavy, large-capacity iron cores, making the hoisting of the iron core and the fixed installation of the oil tank more stable and secure.

[0012] Furthermore, the fastener is a steel strip, the first body is provided with two sets of first rectangular holes, the second body is provided with two sets of second rectangular holes, and the steel strip passes through the two sets of first rectangular holes and the two sets of second rectangular holes in sequence and then connects end to end.

[0013] The above solution achieves the fastening and fixing of the iron core by tensioning the steel strip, eliminating the need for complex steps such as welding and bolt fixing, and is easy to operate.

[0014] Furthermore, insulating elements are provided between the end faces of the two first clamping parts and the two second clamping parts that are in contact with the iron core.

[0015] Furthermore, the insulating component is an insulating paperboard, and the thickness of the insulating paperboard is greater than the bending radius of the upper clamp and the lower clamp.

[0016] The above solution avoids interference between the core's sharp edges and the bending points of the upper and lower clamps, while also providing lateral restraint on the core, making the core more stable overall. At the same time, it effectively prevents conductive circuits, thereby reducing additional losses, avoiding local overheating, and ensuring that the transformer can operate safely and efficiently.

[0017] A single-phase planar iron core consists of core columns and a yoke. The space defined by the core columns and the yoke is the inner window of the iron core.

[0018] Furthermore, the two first clamping parts remain flush with the upper surface of the inner window of the iron core.

[0019] Furthermore, the two second clamping parts remain flush with the lower end face of the inner window of the core.

[0020] Through the above scheme, the coil wound on the core column supports the insulation inside the upper clamp, preventing the insulation from falling off. To maintain consistency in the machining of the upper and lower clamps, the two clamping parts of the lower clamp are also designed to be flush with the lower end face of the inner window of the core.

[0021] Compared with the prior art, the beneficial technical effects of this utility model are as follows: (1) The upper clamp and the connecting part adopt an integral molding design, which is simple in structure and has no redundancy. No welding or opening / groove is required, which avoids related processes and waste from the source, simplifies production and reduces costs, and is easy to operate. (2) The two clamping parts of the upper clamp are flush with the upper end face of the inner window of the iron core, and can rely on the winding coil on the iron core column to support the internal insulation parts, effectively preventing them from falling off. Attached Figure Description

[0022] Figure 1 This invention illustrates a clamping structure for a planar iron core in the prior art.

[0023] Figure 2 The clamping structure of a lightweight iron core provided in Embodiment 1 of this utility model is shown.

[0024] Figure 3 This diagram illustrates the state of the upper clamp provided in Embodiment 1 of the present invention during use.

[0025] Figure 4 The clamping structure for a heavy iron core provided in Embodiment 2 of this utility model is shown.

[0026] Reference numerals: 1. Iron core; 2. Upper clamp; 2.1. First rectangular hole; 2.2. Connecting part; 2.3. First body; 2.4. First clamping part; 3. Lower clamp; 3.1. Second rectangular hole; 3.2. Second body; 3.3. Second clamping part; 4. Insulating cardboard; 5. Steel strip; 6. Oil tank; 7. First clamp; 8. Second clamp; 9. Lifting lug; 10. Pull rod; 11. Fastening bolt. Detailed Implementation Example 1

[0027] A single-phase planar iron core clamping structure, see [reference] Figure 2 The system includes an upper clamp 2 and a lower clamp 3. The upper clamp 2 is an integrally formed U-shaped bent component, including a first body 2.3 and first clamping portions 2.4 bent from both sides of the first body 2.3 toward the core. Each first clamping portion 2.4 has a free end, which is located at the end of the first clamping portion 2.4 along the length of the first body 2.3. The free ends of the two first clamping portions 2.4 are diagonally distributed. The free ends are bent in the opposite direction to the bending direction of the first clamping portion 2.4 to form a connecting portion 2.2. The connecting portion 2.2 has mounting holes for hoisting the core and installing the oil tank. The lower clamp 3 is also an integrally formed U-shaped bent component, including a second body 3.2 and second clamping portions 3.3 bent from both sides of the second body 3.2 toward the core.

[0028] For lighter iron cores, the above solution ensures that the connection part has good load-bearing capacity while reducing the manufacturing difficulty of the upper clamp and reducing manufacturing costs.

[0029] See Figure 2 A single-phase planar iron core clamping structure also includes fasteners, which are steel strips 5. Two sets of first rectangular holes 2.1 are provided on the first body 2.3, and two sets of second rectangular holes 3.1 are provided on the second body 3.2. During installation, the two sets of first rectangular holes 2.1 and the two sets of second rectangular holes 3.2 are coaxially aligned. The steel strip 5 passes through the four sets of rectangular holes sequentially and then connects end to end. By tensioning the steel strip, the upper clamp 2 and the lower clamp 3 together clamp the iron core.

[0030] Insulating components are provided between the end faces of the two first clamping parts 2.4 and the two second clamping parts 3.3 that are in contact with the core. The insulating components are insulating paperboard 4, the thickness of which is greater than the bending radius of the upper and lower clamping parts. This avoids interference between the core edges and the bending points of the upper clamping parts 2 and 3. At the same time, it can limit the core from the side, making the core more stable as a whole. It also effectively prevents conductive circuits, thereby reducing additional losses, avoiding local overheating, and ensuring that the transformer can operate safely and efficiently.

[0031] See Figure 3 During installation, place the connecting part 2.2 into the oil tank 6 and fit it against the bent plate of the oil tank wall. Use fastening bolts to fix the connecting part 2.2 to the bent plate of the oil tank wall. Example 2

[0032] For heavier iron cores, see [reference needed]. Figure 4 The difference from Embodiment 1 is that each first clamping part 2.4 is provided with two free ends, which are located at both ends of the first clamping part 2.4, to increase the load-bearing capacity of the connecting part 2.2, making the hoisting of the iron core and the installation of the oil tank more stable and secure.

[0033] The two first clamping parts 2.4 are flush with the upper end face of the inner core window, and the two second clamping parts 3.3 are flush with the lower end face of the inner core window. The coil wound on the core column supports the insulating cardboard 4 inside the upper clamping part, preventing the insulating cardboard 4 from falling off. To maintain the consistency of the processing of the upper clamping part 2 and the lower clamping part 3, the two second clamping parts 2.4 are also set to be flush with the lower end face of the inner core window.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A single-phase planar iron core clamping structure, comprising an upper clamp (2), a lower clamp (3), and fasteners, wherein the upper clamp (2) and the lower clamp (3) are fixed together by fasteners, characterized in that: The upper clamp (2) includes a first body (2.3) and two first clamping portions (2.4) bent from both sides of the first body (2.2) toward the core. The first clamping portion (2.4) is provided with a free end, which is located at the end of the first clamping portion (2.4) along the length direction of the first body (2.3). The free end is bent in the opposite direction to the bending direction of the first clamping portion (2.4) to form a connecting portion (2.2). The connecting portion (2.2) is provided with a mounting hole. The lower clamp (3) includes a second body (3.2) and two second clamping portions (3.3) bent from both sides of the second body (3.2) toward the core.

2. The single-phase planar iron core clamping structure as described in claim 1, characterized in that: Each of the first clamping parts (2.4) has a free end, and the free ends of the two first clamping parts (2.4) are distributed diagonally.

3. The single-phase planar iron core clamping structure as described in claim 1, characterized in that: Each of the first clamping parts (2.4) has two free ends, which are located at both ends of the first clamping part (2.4).

4. A single-phase planar iron core clamping structure as described in any one of claims 2 or 3, characterized in that: The fastener is a steel strip (5). The first body (2.3) is provided with two sets of first rectangular holes (2.1), and the second body (3.2) is provided with two sets of second rectangular holes (3.1). The steel strip (5) passes through the two sets of first rectangular holes (2.1) and the two sets of second rectangular holes (3.1) in sequence and then connects end to end.

5. The single-phase planar iron core clamping structure as described in claim 4, characterized in that: Insulating elements (4) are provided between the end faces of the two first clamping parts (2.4) and the two second clamping parts (3.3) that are in contact with the iron core (1).

6. The single-phase planar iron core clamping structure as described in claim 5, characterized in that: The insulating component is an insulating paperboard (4), and the thickness of the insulating paperboard (4) is greater than the bending radius of the upper clamp (2) and the lower clamp (3).

7. The single-phase planar iron core clamping structure as described in claim 6, characterized in that: The two first clamping parts (2.4) are flush with the upper surface of the inner window of the core.

8. The single-phase planar iron core clamping structure as described in claim 7, characterized in that: The two second clamping parts (3.3) are flush with the lower end face of the inner window of the core.

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