Locking device for transformer core

Abstract

This utility model discloses a locking device for a transformer core, comprising two upper clamping plates and two lower clamping plates. The two upper clamping plates are respectively disposed on both sides of the upper end of the core, and the two lower clamping plates are disposed on both sides of the lower end of the core. The two ends of the two lower clamping plates are respectively connected by two horizontal plates. The two ends of the two upper clamping plates are respectively connected by a connecting member. The connecting member includes a connecting cylinder and a connecting rod. The first end of the connecting cylinder is provided with a first limiting block, and the second end of the connecting cylinder passes through one of the upper clamping plates. The second end of the connecting cylinder is open and has an internal thread. This utility model, through the setting of the connecting member, achieves the tightening and fixing of the upper clamping plates with only one tightening, making the fixing process simple and quick. At the same time, the connecting rod and the connecting cylinder form an integrated structure, ensuring that the two upper clamping plates bear the same force.

Description

Technical Field

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

[0002] The core of a transformer is typically composed of silicon steel sheets, and clamping is required between the sheets and the core. In older cores, each layer of silicon steel sheets was the same size, resulting in a square core for the winding section. With technological advancements, the size of the silicon steel sheets used in each layer has changed; the middle layer has larger sheets, while the outer layers have smaller sheets, leading to a more rounded core for the winding section. If a round core is clamped using the same method as a square core, excessive clamping can deform the core, creating gaps between the sheets; insufficient clamping fails to hold the core securely. Both looseness and gaps between the sheets increase the magnetic reluctance in the transformer, leading to increased heat generation and reduced conversion efficiency.

[0003] To solve this problem, the existing patent with publication number CN211208203U proposed a locking device for transformer cores. The fixing method is that "the two ends of the first locking component are provided with threaded first connecting rods" to lock with nuts. In the actual production process of transformers, the nuts need to be tightened onto the screws at both ends of the first locking component to lock, which is a troublesome locking process. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a locking device for transformer cores. With the setting of the connecting parts, the upper clamping plate can be tightened and fixed with only one turn. The fixing process is simple and fast. At the same time, the connecting rod and the connecting cylinder form an integrated structure, which can ensure that the two upper clamping plates are subjected to the same force.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A locking device for a transformer core includes two upper clamping plates and two lower clamping plates. The two upper clamping plates are respectively disposed on both sides of the upper end of the core, and the two lower clamping plates are disposed on both sides of the lower end of the core. The two ends of the two lower clamping plates are respectively connected by two horizontal plates. The two ends of the two upper clamping plates are respectively connected by connecting members.

[0007] The connector includes a connecting cylinder and a connecting rod. The first end of the connecting cylinder is provided with a first limiting block, and the second end of the connecting cylinder passes through one of the upper clamping plates. The second end of the connecting cylinder is open and has an internal thread.

[0008] The first end of the connecting rod is provided with a second limiting block, and the second end of the connecting rod passes through another upper clamping plate and extends into the second end of the connecting cylinder to be threadedly connected to the connecting cylinder.

[0009] Furthermore, the second end of the connecting rod has a frustum-shaped structure.

[0010] Furthermore, a drive nut for rotating the connecting rod is provided on the outside of the connecting rod.

[0011] Furthermore, the driving nut is a hexagonal nut.

[0012] Furthermore, the drive nut is fixed to the connecting rod.

[0013] Furthermore, the drive nut is detachably connected to the connecting rod.

[0014] Furthermore, the connecting rod is provided with external threads, the driving nut is threadedly connected to the connecting rod, and two limiting sleeves are also threadedly connected to the connecting rod, with the two limiting sleeves located on both sides of the driving nut.

[0015] The beneficial effects of this utility model are:

[0016] This utility model, through the setting of the connecting part, can achieve the tightening and fixing of the upper clamping plate with only one screwing. The fixing process is simple and quick. At the same time, the connecting part formed by the connecting rod and the connecting cylinder is an integrated structure, which can ensure that the two upper clamping plates are subjected to the same force. Attached Figure Description

[0017] Figure 1 The three-dimensional locking device for the transformer core in this embodiment of the utility model. Figure 1 ;

[0018] Figure 2 Three-dimensional locking device for transformer core Figure 2 ;

[0019] Figure 3 A 3D view of the locking device for the transformer core, which is hidden behind the core.

[0020] In the diagram, 1 is the upper clamping plate; 2 is the lower clamping plate; 3 is the iron core; 4 is the horizontal plate; 5 is the connecting piece; 6 is the connecting cylinder; 7 is the connecting rod; 8 is the first limiting block; 9 is the second limiting block; 10 is the driving nut; and 11 is the limiting screw sleeve. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] See Figures 1-3 This utility model provides a technical solution: Example

[0023] like Figures 1-3 As shown, a locking device for a transformer core includes two upper clamping plates 1 and two lower clamping plates 2. The two upper clamping plates 1 are respectively disposed on both sides of the upper end of the core 3, and the two lower clamping plates 2 are disposed on both sides of the lower end of the core 3. The two ends of the two lower clamping plates 2 are respectively connected by two horizontal plates 4; the two ends of the two upper clamping plates 1 are respectively connected by connecting pieces 5.

[0024] The connector 5 includes a connecting cylinder 6 and a connecting rod 7. The first end of the connecting cylinder 6 is provided with a first limiting block 8. The second end of the connecting cylinder 6 passes through one of the upper clamping plates 1, and the second end of the connecting cylinder 6 is open and has an internal thread.

[0025] The first end of the connecting rod 7 is provided with a second limiting block 9, and the second end of the connecting rod 7 has a tapered structure to facilitate guidance; its second end, which passes through another upper clamping plate 1 and extends into the second end of the connecting cylinder, is threadedly connected to the connecting cylinder 6.

[0026] The connecting rod 7 is provided with a drive nut 10 for rotating the connecting rod 7. The drive nut 10 is a hexagonal nut. The drive nut 10 is fixed to the connecting rod 7 (which may be welded, but is not limited to).

[0027] Two coaxial through holes are respectively formed on the two upper clamping plates 1. The connecting cylinder 6 passes through the first through hole coaxially, and the connecting rod 7 passes through the second through hole coaxially. The diameter of the first through hole is larger than the diameter of the second through hole. At the same time, the diameter of the first limiting block 8 is larger than its inner diameter and larger than the diameter of the first through hole for bearing tension. The same applies to the second limiting block 9.

[0028] The upper and lower clamping plates are connected by a vertical rod.

[0029] During assembly, the upper and lower ends of the iron core 3 are fixed by two upper clamping plates 1 and two lower clamping plates 2 respectively. The lower clamping plates 2 are fixed on the horizontal plate 4 to maintain stability.

[0030] The upper clamping plate 1 is fixed by the connector 5. The fixing process is as follows: the drive nut 10 is clamped and rotated by an auxiliary tool such as a wrench. The drive nut 10 drives the connecting rod 7 to rotate synchronously, thereby causing the second end of the connecting rod 7 to be screwed into the connecting cylinder 6. In this way, the first limiting block 8 and the second limiting block 9 can be pulled tight on the two upper clamping plates 1 to achieve the fixing of the upper clamping plate 1.

[0031] This utility model, through the setting of the connector 5, can achieve the tightening and fixing of the upper clamping plate 1 with only one screwing. The fixing process is simple and quick. At the same time, the connector 5 formed by the connecting rod 7 and the connecting cylinder 6 is an integrated structure, which can ensure that the two upper clamping plates 1 are subjected to the same force. Example

[0032] The difference between this embodiment and Embodiment 1 is that, as Figure 1 and Figure 2 As shown, the drive nut 10 is detachably connected to the connecting rod 7.

[0033] The connecting rod 7 has an external thread, and the driving nut 10 is threadedly connected to the connecting rod 7. Two limiting sleeves 11 are also threadedly connected to the connecting rod 7, and the two limiting sleeves 11 are located on both sides of the driving nut 10. Each limiting sleeve 11 is a circular sleeve structure with an internal thread, and the outer diameter of the limiting sleeve 11 is smaller than the diameter of the circumscribed circle of the driving nut 10.

[0034] With this configuration, both the drive nut and the limit sleeve can be detached from the connecting rod, making them easy to store and transport separately.

[0035] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A locking device for a transformer core, comprising two upper clamping plates and two lower clamping plates, the two upper clamping plates being respectively disposed on both sides of the upper end of the core, and the two lower clamping plates being disposed on both sides of the lower end of the core, the two ends of the two lower clamping plates being respectively connected by two horizontal plates; characterized in that: The two ends of the two upper clamping plates are connected by connectors. The connector includes a connecting cylinder and a connecting rod. The first end of the connecting cylinder is provided with a first limiting block, and the second end of the connecting cylinder passes through one of the upper clamping plates. The second end of the connecting cylinder is open and has an internal thread. The first end of the connecting rod is provided with a second limiting block, and the second end of the connecting rod passes through another upper clamping plate and extends into the second end of the connecting cylinder to be threadedly connected to the connecting cylinder.

2. The locking device for the transformer core according to claim 1, characterized in that: The second end of the connecting rod has a frustum-shaped structure.

3. The locking device for the transformer core according to claim 1, characterized in that: The connecting rod is provided with a drive nut on its outside for rotating the connecting rod.

4. The locking device for the transformer core according to claim 3, characterized in that: The drive nut is a hexagonal nut.

5. The locking device for the transformer core according to claim 4, characterized in that: The drive nut is fixed to the connecting rod.

6. The locking device for the transformer core according to claim 4, characterized in that: The drive nut is detachably connected to the connecting rod.

7. The locking device for the transformer core according to claim 6, characterized in that: The connecting rod has an external thread, and the driving nut is threadedly connected to the connecting rod. The connecting rod is also threaded with two limiting sleeves, which are located on both sides of the driving nut.

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