High-capacity dry-type power transformer low-voltage coil winding structure

Abstract

The utility model relates to the technical field of coil winding, in particular to a low-voltage coil winding structure of a high-capacity dry-type power transformer, which comprises a coil framework, a bottom plate arranged below the coil framework, a take-up side plate and a pay-off side plate arranged on the bottom plate, a take-up motor arranged on the take-up side plate, a fixed plate and a sliding chute arranged on the bottom plate, a reciprocating cylinder arranged on the fixed plate, and a sliding chute arranged on the sliding chute. The bottom plate is provided with a main support, the main support is provided with a guide support and an agent storage box, the guide support is rotatably provided with a rotating disc, the rotating disc is provided with a cleaning brush sheet, the main support is provided with an agent pumping pump, the agent pumping pump is provided with an agent pumping pipe and an agent conveying pipe, and the agent conveying pipe is provided with an agent conveying pipe. The agent conveying pipe is provided with an agent spraying head, and the main support is provided with a rib plate. The influence of oil stains, particles, dust and stains on the normal electric energy transmission and conversion work functions of the low-voltage coil formed by winding in the later period is avoided, and the structural stability of the bending part of the main support is improved.

Description

Technical Field

[0001] This utility model relates to the field of coil winding technology, and in particular to the low-voltage coil winding structure of a large-capacity dry-type power transformer. Background Art

[0002] Large-capacity dry-type power transformers are power equipment specifically designed for high load and high capacity demands. They are widely used in industrial facilities, commercial buildings, data centers, and other critical infrastructure. Low-voltage coils are installed in large-capacity dry-type power transformers.

[0003] The low-voltage coil of a large-capacity dry-type power transformer is mainly used for power transmission and conversion. Specifically, it achieves voltage rise and fall through the change of magnetic field between the low-voltage coil and the high-voltage coil using the principle of electromagnetic induction.

[0004] The low-voltage coils of large-capacity dry-type power transformers require a winding structure during production.

[0005] Currently, in the low-voltage coil winding structure of existing large-capacity dry-type power transformers, before winding, insulated wires are usually taken from the warehouse and then positioned on the unwinding rollers before the subsequent winding operation can begin. However, since the insulated wires have been stored in the warehouse for a long time, oil stains, dust, and dirt will remain on their surface. If they are directly wound onto the coil frame, these oil stains, dust, and dirt will affect the normal function of the low-voltage coil in transmitting and converting electrical energy. Utility Model Content

[0006] The purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing a low-voltage coil winding structure for a large-capacity dry-type power transformer.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The design includes a low-voltage coil winding structure for a large-capacity dry-type power transformer, comprising a coil frame, a base plate below the coil frame, a take-up side plate and a pay-off side plate on the base plate, a take-up motor on the take-up side plate, a fixed plate and a sliding groove on the base plate, a reciprocating cylinder on the fixed plate, a cylinder rod on the reciprocating cylinder, a pay-off roller on the pay-off side plate, an insulated wire wound on the pay-off roller, a main support on the base plate, and a guide support and a storage tank on the main support.

[0009] A turntable is rotatably mounted on the guide support, and a cleaning brush is provided on the turntable. A pump is provided on the main support.

[0010] The pump is equipped with a pumping tube and a delivery tube. The delivery tube is equipped with a spray head. The storage tank is equipped with a replenishment tube. The main support is equipped with ribs.

[0011] Furthermore, the cylinder rod is fixedly mounted to the housing of the take-up motor, the take-up side plate is slidably engaged with the slide groove, and the motor shaft of the take-up motor is fixedly mounted to the coil frame.

[0012] Furthermore, the two ends of the extraction tube are connected to the storage tank and the extraction pump, respectively, and the left end of the extraction tube is connected to the lower part of the inner cavity of the storage tank.

[0013] Furthermore, the infusion tube has an overall L-shaped structure and passes through the main support.

[0014] Furthermore, the spray head has an overall downward-diffusing horn structure, and the spray head does not come into contact with the insulated wire.

[0015] Furthermore, the guide bracket and the turntable are a set, and there are two sets arranged symmetrically in total. The cleaning brush is arranged along the outer wall of the turntable.

[0016] Furthermore, the side section of the main support is a bent structure, and the rib plate is a triangular structure and is disposed at the bent part of the main support.

[0017] The beneficial effects of the low-voltage coil winding structure of the large-capacity dry-type power transformer proposed in this utility model are as follows:

[0018] 1. This utility model features a main support with a storage tank and guide brackets on a base plate. A pump is connected to the storage tank, and a delivery pipe with a spray head is installed on the pump. A turntable with cleaning brushes is rotatably mounted on the guide bracket. Before winding, a cleaning agent is sprayed, and then the insulated wire is thoroughly and symmetrically cleaned with a roller brush using the cleaning agent. This improves the cleanliness of the outer surface of the insulated wire and prevents oil stains, dust, and dirt from affecting the normal power transmission and conversion functions of the low-voltage coil after winding.

[0019] 2. This utility model further improves the structural stability of the bending part of the main support by setting a triangular rib structure at the bending part of the main support. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0021] Figure 2 For the present utility model Figure 1 A three-dimensional schematic diagram of the main support structure with cleaning brushes;

[0022] Figure 3 This is a front view schematic diagram of the overall structure of this utility model;

[0023] Figure 4 For the present utility model Figure 3 Enlarged view of a partial cross-section at point H in the middle;

[0024] Figure 5 For the present utility model Figure 2 A side view of the overall structure.

[0025] In the diagram: 1. Coil frame; 11. Take-up side plate; 12. Take-up motor; 2. Reciprocating cylinder; 21. Cylinder rod; 3. Base plate; 31. Slide groove; 32. Fixing plate; 4. Pay-off side plate; 41. Pay-off roller; 42. Insulated wire; 5. Main support; 51. Rib plate; 6. Guide support; 61. Turntable; 62. Cleaning brush; 7. Storage tank; 71. Replenishment pipe; 8. Extraction pump; 81. Extraction pipe; 82. Delivery pipe; 83. Spray head. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1-5 The low-voltage coil winding structure of a large-capacity dry-type power transformer includes a coil frame 1, a base plate 3 below the coil frame 1, a take-up side plate 11 and a pay-off side plate 4 on the base plate 3, a take-up motor 12 on the take-up side plate 11, a fixed plate 32 and a sliding groove 31 on the base plate 3, a reciprocating cylinder 2 on the fixed plate 32, a cylinder rod 21 on the reciprocating cylinder 2, a pay-off roller 41 on the pay-off side plate 4, an insulated wire 42 wound on the pay-off roller 41, a main support 5 on the base plate 3, a guide support 6 and a storage tank 7 on the main support 5;

[0028] A turntable 61 is rotatably mounted on the guide bracket 6, and a cleaning brush 62 is mounted on the turntable 61. A pump 8 is mounted on the main bracket 5.

[0029] The pump 8 is equipped with a pumping pipe 81 and a delivery pipe 82. The delivery pipe 82 is equipped with a spray head 83. The storage tank 7 is equipped with a replenishment pipe 71. The main support 5 is equipped with a rib plate 51. Some of the structures described in this patent are common structures for winding low-voltage coils of large-capacity dry-type power transformers and are existing technologies. Some existing structures are not marked and need not be described in detail. When the insulated wire 42 is wound onto the coil frame 1, the finished low-voltage coil can be formed. This is existing technology.

[0030] The replenishment tube 71 allows for easy replenishment of liquid cleaning agents.

[0031] The cylinder rod 21 is fixedly mounted to the housing of the take-up motor 12. The take-up side plate 11 is slidably engaged with the slide groove 31. The cross-section of the sliding joint between the bottom of the take-up side plate 11 and the slide groove 31 is a T-shaped structure to achieve longitudinal sliding while preventing the take-up side plate 11 from slipping off the slide groove 31.

[0032] The motor shaft of the take-up motor 12 is fixedly set to the coil frame 1. The cylinder rod 21 and the reciprocating cylinder 2 are a group. The cylinder rod 21 can realize longitudinal reciprocating extension and retraction with adjustable distance.

[0033] The two ends of the extraction tube 81 are connected to the storage tank 7 and the extraction pump 8, respectively. The left end of the extraction tube 81 is connected to the lower part of the inner cavity of the storage tank 7. The storage tank 7 is pre-filled with liquid cleaning agent, which is the commonly used isopropyl alcohol cleaning agent.

[0034] The infusion tube 82 has an overall L-shaped structure. The infusion tube 82 passes through the main support 5. The outer wall of the infusion tube 82 passing through the main support 5 is welded and fixed to the pre-set perforation part of the main support 5 to prevent the spray head 83 from shaking.

[0035] The spray head 83 has a downward-diffusing horn structure, which enables the liquid cleaner to be sprayed all over the outer surface of the insulated wire 42.

[0036] The spray nozzle 83 does not come into contact with the insulated wire 42 to avoid collision and friction between the two.

[0037] The guide bracket 6 and the turntable 61 are a set, and there are two sets in total, symmetrically arranged. The cleaning brush 62 is set along the outer wall of the turntable 61. The cleaning brush 62 is made of soft nylon material. Combined with liquid cleaning agent, it can perform a comprehensive symmetrical roller cleaning of the outer surface of the insulated wire 42.

[0038] The back of the cleaning brush 62 is fixed to the turntable 61 by a commonly used disposable adhesive film, which makes it easy to peel off the dirty cleaning brush 62 and then attach a new cleaning brush 62, making replacement convenient.

[0039] The side section of the main support 5 is a bent structure, and the rib plate 51 is a triangular structure and is set at the bent part of the main support 5. The rib plate 51 is made of hard alloy steel, which has high strength and does not deform, and the triangular structure has strong stability.

[0040] Working method: Specifically, one end of the insulated wire 42 is first pulled to the right and fixed onto the coil frame 1. Then, the take-up motor 12 and the reciprocating cylinder 2 are started. The take-up motor 12 will drive the coil frame 1 to rotate at a constant speed. At the same time, the cylinder rod 21 on the reciprocating cylinder 2 will reciprocate longitudinally according to the moving extension distance, thereby driving the take-up side plate 11 to slide longitudinally along the slide groove 31, which can drive the coil frame 1 to move longitudinally back and forth. At this time, the coil frame 1, which rotates uniformly and moves longitudinally back and forth, will take the insulated wire 42 wrapped on the pay-off roller 41 to the right at a constant speed and wind it, thus realizing the winding and shaping of the insulated wire 42 (which is the prior art).

[0041] Simultaneously, the pump 8 is activated, drawing liquid cleaning agent from the storage tank 7 via the pumping pipe 81. This agent is then evenly sprayed onto the outer surface of the laterally wound insulated wire 42 through the delivery pipe 82 and spray head 83. As the insulated wire 42, coated with cleaning agent, passes the turntable 61, it rotates. Simultaneously, the cleaning agent, combined with the soft nylon cleaning brush 62, thoroughly and symmetrically cleans the outer surface of the insulated wire 42, removing residual oil, dust, and dirt. This improves the cleanliness of the outer surface of the insulated wire 42 and prevents oil, dust, and dirt from affecting the normal power transmission and conversion functions of the low-voltage coil after winding.

[0042] In addition, by setting a triangular rib plate 51 structure at the bending part of the main support 5, the structural stability of the bending part of the main support 5 is further improved.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-voltage coil winding structure for a large-capacity dry-type power transformer, comprising a coil bobbin (1), characterized in that: The coil frame (1) is provided with a base plate (3) below it. The base plate (3) is provided with a take-up side plate (11) and a pay-off side plate (4). The take-up side plate (11) is provided with a take-up motor (12). The base plate (3) is provided with a fixed plate (32) and a sliding groove (31). The fixed plate (32) is provided with a reciprocating cylinder (2). The reciprocating cylinder (2) is provided with a cylinder rod (21). The pay-off side plate (4) is provided with a pay-off roller (41). The pay-off roller (41) is wound with an insulated wire (42). The base plate (3) is provided with a main support (5). The main support (5) is provided with a guide support (6) and a storage tank (7). A turntable (61) is rotatably mounted on the guide bracket (6), and a cleaning brush (62) is provided on the turntable (61). A pump (8) is provided on the main bracket (5). The pump (8) is equipped with a pumping pipe (81) and a delivery pipe (82). The delivery pipe (82) is equipped with a spray head (83). The storage tank (7) is equipped with a replenishment pipe (71). The main support (5) is equipped with a rib plate (51).

2. The low-voltage coil winding structure of the large-capacity dry-type power transformer according to claim 1, characterized in that: The cylinder rod (21) is fixedly installed on the housing of the take-up motor (12), the take-up side plate (11) is slidably engaged with the slide groove (31), and the motor shaft of the take-up motor (12) is fixedly installed on the coil frame (1).

3. The low-voltage coil winding structure of the large-capacity dry-type power transformer according to claim 1, characterized in that: The two ends of the extraction tube (81) are connected to the storage tank (7) and the extraction pump (8) respectively, and the left end of the extraction tube (81) is connected to the lower part of the inner cavity of the storage tank (7).

4. The low-voltage coil winding structure of the large-capacity dry-type power transformer according to claim 1, characterized in that: The infusion tube (82) has an overall L-shaped structure and passes through the main support (5).

5. The low-voltage coil winding structure of the large-capacity dry-type power transformer according to claim 1, characterized in that: The spray head (83) is a downward-diffusing horn structure, and the spray head (83) does not come into contact with the insulated wire (42).

6. The low-voltage coil winding structure of the large-capacity dry-type power transformer according to claim 1, characterized in that: The guide bracket (6) and the turntable (61) are a set, and there are two sets symmetrically arranged. The cleaning brush (62) is arranged along the outer wall of the turntable (61).

7. The low-voltage coil winding structure of the large-capacity dry-type power transformer according to claim 1, characterized in that: The side section of the main support (5) is a bent structure, and the rib (51) is a triangular structure and is located at the bent part of the main support (5).

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