Variable-frequency rectifier transformer with novel mutual inductor mounting structure

Abstract

The utility model relates to the field of transformers, and discloses a novel transformer installation structure frequency conversion rectifier transformer which comprises a transformer box cover, the top of the transformer box cover is fixedly connected with a flange plate, the surface of the flange plate is fixedly connected with a connecting flange through bolts, and the top of the connecting flange is fixedly connected with a sleeve. The top of the transformer box cover is fixedly connected with a pipe joint, the top of the pipe joint is provided with a mutual inductor wiring terminal plate, the bottom of the mutual inductor wiring terminal plate is fixedly connected with a mounting block, and the upper surface of the pipe joint is provided with a clamping groove. According to the transformer wiring terminal board, the pipe joint, the mounting block, the clamping groove and other structures are arranged, so that the mounting convenience of the transformer wiring terminal board is improved, the connecting line can be limited, the situation that the transformer wiring terminal board is conventionally mounted on the ascending flanged base is avoided, the material cost and the manufacturing cost are reduced, and meanwhile, the height limitation of transformer transportation can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of transformers, and in particular to a novel variable frequency rectifier transformer with a novel instrument transformer mounting structure. Background Technology

[0002] Installing a current transformer on a transformer allows it to sense changes in the transformer current, convert them into electrical signals, and output them to the corresponding measurement or protection devices. This enables real-time monitoring and protection of the transformer's operating status. If an abnormal current occurs during transformer operation, the current transformer can sense the electrical signal and convert it into the signal required by the protection device, thereby triggering the protection mechanism and protecting the safe and stable operation of the transformer.

[0003] In the past, the installation of current transformer terminal blocks on transformers involved raising a support on the transformer tank cover, welding pipe joints to the side wall of the support, and then installing the current transformer terminal blocks on the pipe joints.

[0004] In existing technologies, the instrument transformer terminal block is typically fixed to the transformer's riser mount via pipe joints. This not only increases the amount of transformer oil and steel used, but also increases the transformer's height during transportation. Due to height restrictions during transport, the bushings and riser mount need to be removed for transport, increasing material costs and making it inconvenient to transport the transformer as a whole. Furthermore, the lack of installation limit function on the instrument transformer terminal block leads to inconvenience in connecting it to the instrument transformer body. Therefore, a novel instrument transformer installation structure frequency converter rectifier transformer is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a novel variable frequency rectifier transformer with a new transformer mounting structure. It aims to improve the existing technology where the transformer terminal block is mounted on the riser, which increases material costs and makes the transformer difficult to transport. In addition, the transformer terminal block lacks an installation limit function, which reduces the ease of connection with the transformer body.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel variable frequency rectifier transformer with a current transformer mounting structure, comprising a transformer tank cover, a flange fixedly connected to the top of the transformer tank cover, a connecting flange fixedly connected to the surface of the flange by bolts, a sleeve fixedly connected to the top of the connecting flange, a pipe joint fixedly connected to the top of the transformer tank cover, a current transformer terminal block provided on the top of the pipe joint, a mounting block fixedly connected to the bottom of the current transformer terminal block, a slot provided on the upper surface of the pipe joint, and a limit component provided on the surface of the pipe joint.

[0007] As a further description of the above technical solution:

[0008] The outer wall of the mounting block is adapted to the inner wall of the slot.

[0009] As a further description of the above technical solution:

[0010] The limiting component includes a bayonet, a connecting rod is fixedly connected to the inner wall of the pipe joint, a wire clamping plate is fixedly connected to one end of the connecting rod, a clamping block is fixedly connected to the other end of the connecting rod, and a spring is sleeved on the outer wall of the connecting rod.

[0011] As a further description of the above technical solution:

[0012] The bayonet opening is located on the side wall of the mounting block, and the inner wall of the bayonet opening is adapted to the outer wall of the mounting block.

[0013] As a further description of the above technical solution:

[0014] One end of the spring is fixedly connected to the inner surface of the pipe joint, and the other end of the spring is fixedly connected to the outer wall of the wire clamping plate.

[0015] As a further description of the above technical solution:

[0016] The side wall of the wire clamping plate is provided with a groove, and a rolling ring is rotatably connected to the inner wall of the groove. The outer wall of the wire clamping plate is provided with a limit groove.

[0017] As a further description of the above technical solution:

[0018] The groove is formed on the outer wall of the cable clamp on the side away from the connecting rod.

[0019] As a further description of the above technical solution:

[0020] The edges of the limiting groove are rounded.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by setting up a pipe joint, mounting block, slot and limiting component, the current transformer terminal block can be quickly installed on the transformer box cover, which improves the convenience of current transformer terminal block installation and can limit the connection wire. It avoids the conventional installation of current transformer terminal block on the lifting seat, reduces material cost and manufacturing cost, and reduces the height restriction of transformer transportation.

[0023] 2. In this utility model, by providing a groove, a rolling ring and a limiting groove, the position of the connecting wire of the current transformer terminal block can be adjusted while limiting the position of the connecting wire, so as to facilitate the connection between the current transformer terminal block and the current transformer body. Attached Figure Description

[0024] Figure 1 A top view of the main structure of a novel instrument transformer mounting structure frequency converter transformer proposed in this utility model;

[0025] Figure 2 This utility model proposes a novel instrument transformer mounting structure for a frequency converter rectifier transformer. Figure 1 Enlarged view of region A in the middle;

[0026] Figure 3 A partial separation schematic diagram of the main structure of a novel instrument transformer mounting structure frequency converter transformer proposed in this utility model;

[0027] Figure 4 A bottom view of the partial structural separation of a novel instrument transformer mounting structure frequency converter transformer proposed in this utility model;

[0028] Figure 5 This utility model proposes a novel instrument transformer mounting structure for a frequency converter rectifier transformer. Figure 4 Enlarged view of region B in the middle;

[0029] Figure 6 This is a top view of a partial structural separation of a frequency converter rectifier transformer, which is a novel instrument transformer mounting structure proposed in this utility model.

[0030] Legend:

[0031] 1. Transformer box cover; 2. Flange; 3. Bushing; 4. Connecting flange; 5. Pipe fitting; 6. Current transformer terminal block; 7. Mounting block; 8. Bayonet; 9. Slot; 10. Connecting rod; 11. Spring; 12. Wire clamping plate; 13. Clamping block; 14. Groove; 15. Rolling ring; 16. Limiting groove. Detailed Implementation

[0032] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-3This utility model provides an embodiment of a novel current transformer installation structure for a frequency converter transformer, comprising a transformer tank cover 1, a flange 2 fixedly connected to the top of the transformer tank cover 1, a connecting flange 4 fixedly connected to the surface of the flange 2 by bolts, a sleeve 3 fixedly connected to the top of the connecting flange 4, a pipe joint 5 fixedly connected to the top of the transformer tank cover 1, a current transformer terminal block 6 provided on the top of the pipe joint 5, the installation of the current transformer is divided into two parts: the current transformer body is installed inside the transformer tank, and the current transformer terminal block 6 is installed outside the transformer, a mounting block 7 is fixedly connected to the bottom of the current transformer terminal block 6, a slot 9 is provided on the upper surface of the pipe joint 5, and a limit component is provided on the surface of the pipe joint 5.

[0034] Reference Figures 4-6 The outer wall of the mounting block 7 is adapted to the inner wall of the slot 9. The mounting block 7 is inserted into the slot 9 to position the current transformer terminal block 6 on the surface of the pipe joint 5. The limiting component includes a bayonet 8, which is opened on the side wall of the mounting block 7. A connecting rod 10 is fixedly connected to the inner wall of the pipe joint 5. One end of the connecting rod 10 is fixedly connected to a wire clamping plate 12, and the other end of the connecting rod 10 is fixedly connected to a clamping block 13. The inner wall of the bayonet 8 is adapted to the outer wall of the clamping block 13. After the clamping block 13 is embedded in the bayonet 8, the spring 11 is in a relatively stretched state. The outer wall of the connecting rod 10 is fitted with the spring 11. One end of the spring 11 is fixedly connected to the inner surface of the pipe joint 5, and the other end of the spring 11 is fixedly connected to the outer wall of the wire clamping plate 12.

[0035] Reference Figure 5 The side wall of the cable clamping plate 12 is provided with a groove 14. The groove 14 is located on the outer wall of the cable clamping plate 12 away from the connecting rod 10. The edge of the limiting groove 16 is rounded. The limiting groove 16 is convenient for limiting the connecting cable. The rounded corners allow the connecting cable to move smoothly. The inner wall of the groove 14 is rotatably connected to a rolling ring 15. The outer wall of the cable clamping plate 12 is provided with a limiting groove 16.

[0036] Working principle: The connecting flange 4 and flange 2 are fixed together with bolts. The bushing 3 is directly installed on the transformer box cover 1. The current transformer terminal block 6 is connected to the current transformer body inside the transformer through a connecting wire. The connecting wire passes through the pipe joint 5. The current transformer terminal block 6 is then placed on the pipe joint 5. At this time, the mounting block 7 will be inserted into the slot 9. The insertion of the mounting block 7 will exert force on the locking block 13. When the locking block 13 is inserted into the bayonet 8, the elastic force of the spring 11 can bring the two sets of locking plates 12 closer together to limit the connection wire. When the position of the connection wire needs to be adjusted, the connection wire is pulled. The rotation of the rolling ring 15 and the rounded corner of the limiting groove 16 can provide a transition for the movement of the connection wire, improving the ease of installation of the current transformer terminal block 6. At the same time, it can limit the connection wire, avoiding the conventional installation of the current transformer on the riser, reducing material and manufacturing costs. At the same time, the current transformer terminal block 6 is directly installed on the transformer box cover 1, which can reduce the overall height of the transformer and reduce the height restrictions during transformer transportation.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel variable frequency rectifier transformer with a transformer housing cover (1), wherein a flange (2) is fixedly connected to the top of the transformer housing cover (1), a connecting flange (4) is fixedly connected to the surface of the flange (2) by bolts, and a bushing (3) is fixedly connected to the top of the connecting flange (4), characterized in that: The top of the transformer box cover (1) is fixedly connected with a pipe joint (5), the top of the pipe joint (5) is provided with a mutual inductor wiring terminal plate (6), the bottom of the mutual inductor wiring terminal plate (6) is fixedly connected with a mounting block (7), the upper surface of the pipe joint (5) is provided with a clamping groove (9), and the surface of the pipe joint (5) is provided with a limiting assembly.

2. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 1, characterized by: The outer wall of the mounting block (7) is matched with the inner wall of the clamping groove (9).

3. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 1, characterized by: The limiting assembly comprises a clamping hole (8), the inner wall of the pipe joint (5) is fixedly connected with a connecting rod (10), one end of the connecting rod (10) is fixedly connected with a wire clamping plate (12), the other end of the connecting rod (10) is fixedly connected with a clamping block (13), and the outer wall of the connecting rod (10) is sleeved with a spring (11).

4. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 3, characterized by: The clamping hole (8) is formed in the side wall of the mounting block (7), and the inner wall of the clamping hole (8) is matched with the outer wall of the clamping block (13).

5. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 3, characterized by: One end of the spring (11) is fixedly connected with the inner surface of the pipe joint (5), and the other end of the spring (11) is fixedly connected with the outer wall of the wire clamping plate (12).

6. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 3, characterized by: The side wall of the wire clamping plate (12) is provided with a recess (14), the inner wall of the recess (14) is rotatably connected with a rolling ring (15), and the outer wall of the wire clamping plate (12) is provided with a limiting groove (16).

7. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 6, characterized by: The recess (14) is formed in the outer wall of the side of the wire clamping plate (12) away from the connecting rod (10).

8. The novel transformer mounting structure frequency conversion rectifier transformer according to claim 6, characterized by: The edge of the limiting groove (16) is provided with a round corner.

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