Single-phase converter transformer with wire outlet structure

Abstract

The utility model discloses a single-phase converter transformer with a wire outlet structure, which belongs to the field of transformers and comprises a transformer body, a sealing cover is fixedly connected to the upper surface of the transformer body, three terminals are fixedly connected to the upper surface of the sealing cover, a connector is fixedly connected to the upper surface of each terminal, and a wire outlet is formed in the lower surface of each connector. The surface of the transformer body is fixedly connected with an overhaul plate through nuts, and three through openings are formed in the outer surface of the overhaul plate. Through threaded connection of the connecting bolt and the connecting nut, the connecting bolt extrudes the expansion ring in the connecting nut, so that the inner ring of the expansion ring is shrunk under the action of pressure, a wire sleeve in the expansion ring can be extruded, gaps of the inner ring of the wire sleeve are reduced under the action of pressure, and the wire sleeve is prevented from being damaged. And the wire outlet end of the transformer body is sealed, so that rainwater can be prevented from entering the transformer body through the wire outlet gap to influence electrical elements in the transformer body, and the use safety of the transformer is improved.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a single-phase converter transformer with an outlet structure. Background Art

[0002] As a device in the high-voltage direct current transmission system, the converter transformer not only bears the combined effect of AC voltage and DC voltage during operation, but also bears the effect of DC polarity reversal voltage at the moment of phase change. Conventional converter transformers are generally led out from the body of the device through the valve side lead, and then along the body to the short shaft side of the oil tank through the valve side bushing to connect to the power grid outside the oil tank. The lead structure path is too long and needs to cross many electrical components inside the oil tank. Therefore, meeting the electrical insulation distance is a major difficulty, and even the size of the oil tank needs to be increased to meet the design requirements. The manufacturing difficulty is relatively large, and the electrical insulation and local overheating problems of the valve side lead structure may occur.

[0003] When the transformer is installed, its internal wires need to be led out using an outgoing wire structure. After the wires are led out, the outgoing wire structure needs to be sealed. Due to the shape of the wires, gaps are easily formed between the wires and the seal, making it possible for rainwater to enter the transformer. Therefore, those skilled in the art provide a single-phase converter transformer with an outgoing wire structure to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a single-phase converter transformer with an outlet structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A single-phase converter transformer with an outlet structure comprises a transformer body, a sealing cover is fixedly connected to the upper surface of the transformer body, three terminals are fixedly connected to the upper surface of the sealing cover, a connector is fixedly connected to the upper surface of each terminal, an inspection plate is fixedly connected to the surface of the transformer body through a nut, three through openings are provided on the outer surface of the inspection plate, three wiring holes are provided on the surface of the transformer body, the back side of each wiring hole is fixedly connected to the front side of the through opening, the back side of each through opening is fixedly connected to a wire sleeve, two limiting rings are fixedly connected to the outer surface of the wire sleeve, connecting bolts and connecting nuts are respectively sleeved on the outer surfaces of the wire sleeves, a limiting frame is fixedly connected to the inner wall of the connecting nut, and an expansion ring is fixedly connected to the outer surface of the limiting frame.

[0007] As a further solution of the utility model: a heat conducting plate is fixedly connected to the front side of the transformer body, and a group of heat dissipation fins is fixedly connected to the front side of the heat conducting plate.

[0008] As a further solution of the utility model: a nameplate is provided on the right side of the transformer body, and the left side of the nameplate is fixedly connected to the right side of the transformer body.

[0009] As a further solution of the utility model: a base is fixedly connected to the bottom surface of the transformer body.

[0010] As a further solution of the utility model: a warning sign is provided on the right side of the transformer body, and the left side of the warning sign is fixedly connected to the right side of the transformer body.

[0011] As a further solution of the utility model: a sealing ring is fixedly connected to the inner wall of the through hole, and the material of the sealing ring is rubber.

[0012] As a further solution of the utility model: the left and right side surfaces of the transformer body are fixedly connected with reinforcement blocks, and the bottom surface of each reinforcement block is fixedly connected to the upper surface of the base.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The outgoing line structure of the single-phase converter transformer is threadedly connected by a connecting bolt and a connecting nut, so that the connecting bolt squeezes the internal expansion ring of the connecting nut, so that the inner ring of the expansion ring contracts under the action of pressure, thereby squeezing the wire sleeve inside it. The wire sleeve reduces the gap of the inner ring under the action of pressure, and the outgoing line end of the transformer body is sealed. Through the above arrangement, rainwater can be prevented from entering the interior of the transformer body through the outgoing line gap and affecting the internal electrical components, thereby increasing the safety of the transformer and greatly improving the practical value of the device. At the same time, when sealing the outgoing line structure, it is only necessary to connect the connecting bolt and the connecting nut by thread and apply pressure to the expansion ring, which is very simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a single-phase converter transformer with an outgoing line structure;

[0016] Figure 2 It is a schematic diagram of a three-dimensional structure from a rear perspective of a single-phase converter transformer with an outlet structure;

[0017] Figure 3 A top cross-sectional view of a transformer body from a rear perspective in a single-phase converter transformer with an outlet structure;

[0018] Figure 4 A top-sectional view of a connecting nut in a single-phase converter transformer with an outlet structure;

[0019] Figure 5 A single-phase converter transformer with an outgoing line structure Figure 2 A schematic diagram of the enlarged structure in the middle.

[0020] In the figure: 1. Transformer body; 2. Heat conduction plate; 3. Heat sink fins; 4. Base; 5. Nameplate; 6. Reinforcement block; 7. Warning sign; 8. Sealing cover; 9. Terminal; 10. Connector; 11. Inspection panel; 12. Sealing ring; 13. Through port; 14. Limiting frame; 15. Wire sleeve; 16. Limiting ring; 17. Connecting bolt; 18. Connecting nut; 19. Expansion ring; 20. Wiring hole. DETAILED DESCRIPTION

[0021] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] See also Figures 1 to 5In an embodiment of the utility model, a single-phase converter transformer with an outlet structure includes a transformer body 1, a sealing cover 8 is fixedly connected to the upper surface of the transformer body 1, three terminals 9 are fixedly connected to the upper surface of the sealing cover 8, a connector 10 is fixedly connected to the upper surface of each terminal 9, an inspection plate 11 is fixedly connected to the surface of the transformer body 1 through a nut, three through openings 13 are opened on the outer surface of the inspection plate 11, three wiring holes 20 are opened on the surface of the transformer body 1, the back of each wiring hole 20 is fixedly connected to the front of the through opening 13, and the back of each through opening 13 is fixedly connected to a wire sleeve 15, the outer surface of the wire sleeve 15 is fixedly connected to two limit rings 16, the outer surface of the wire sleeve 15 is respectively sleeved with connecting bolts 17 and connecting nuts 18, the inner wall of the connecting nut 18 is fixedly connected to a limit frame 14, and the outer surface of the limit frame 14 is fixedly connected to an expansion ring 19.

[0024] A heat conducting plate 2 is fixedly connected to the front of the transformer body 1, and a group of heat dissipation fins 3 are fixedly connected to the front of the heat conducting plate 2. The heat dissipation fins 3 are arranged to improve the heat dissipation performance of the device. A nameplate 5 is arranged on the right side of the transformer body 1, and the left side of the nameplate 5 is fixedly connected to the right side of the transformer body 1. The nameplate 5 is arranged to facilitate the working personnel to understand the basic information of the device. A base 4 is fixedly connected to the bottom surface of the transformer body 1, and the stability of the device can be improved by the arrangement of the base 4.

[0025] A warning sign 7 is provided on the right side of the transformer body 1, and the left side of the warning sign 7 is fixedly connected to the right side of the transformer body 1. The warning sign 7 can remind people to pay attention to safety. A sealing ring 12 is fixedly connected to the inner wall of the opening 13. The material of the sealing ring 12 is rubber. The sealing performance of the device can be improved by the setting of the sealing ring 12. Reinforcement blocks 6 are fixedly connected to the left and right sides of the transformer body 1. The bottom surface of each reinforcement block 6 is fixedly connected to the upper surface of the base 4. The structural stability of the device can be improved by the setting of the reinforcement blocks 6.

[0026] The working principle of the utility model is as follows: when using the device, the staff first uses a fixing tool to fix the device at the installation position through the base 4, and then arranges the outgoing wires inside the transformer body 1, and then the outgoing wire ends are sequentially passed through the wiring hole 20 and the through port 13, and then led out through the wire sleeve 15. After all the outgoing wires inside the transformer body 1 are led out, the connecting bolt 17 and the connecting nut 18 are threadedly connected, and then the connecting bolt 17 is used to apply pressure to the expansion ring 19 inside the connecting nut 18 to deform it and squeeze the wire sleeve 15, so as to achieve the sealing of the outgoing wire end of the transformer body 1.

[0027] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A single-phase converter transformer with an outgoing line structure, comprising a transformer body (1), characterized in that: The upper surface of the transformer body (1) is fixedly connected to a sealing cover (8), the upper surface of the sealing cover (8) is fixedly connected to three terminals (9), the upper surface of each terminal (9) is fixedly connected to a connector (10), the surface of the transformer body (1) is fixedly connected to an inspection plate (11) via a nut, the outer surface of the inspection plate (11) is provided with three through openings (13), the surface of the transformer body (1) is provided with three wiring holes (20), each wiring hole ( The back side of each through opening (13) is fixedly connected to the front side of each through opening (13), and the back side of each through opening (13) is fixedly connected to a wire sleeve (15), and the outer surface of the wire sleeve (15) is fixedly connected to two limit rings (16), and the outer surface of the wire sleeve (15) is respectively sleeved with a connecting bolt (17) and a connecting nut (18), and the inner wall of the connecting nut (18) is fixedly connected to a limit frame (14), and the outer surface of the limit frame (14) is fixedly connected to an expansion ring (19).

2. A single-phase converter transformer with an outlet structure according to claim 1, characterized in that: A heat conducting plate (2) is fixedly connected to the front of the transformer body (1), and a group of heat dissipation fins (3) is fixedly connected to the front of the heat conducting plate (2).

3. The single-phase converter transformer with an outlet structure according to claim 1, characterized in that: A nameplate (5) is provided on the right side of the transformer body (1), and the left side of the nameplate (5) is fixedly connected to the right side of the transformer body (1).

4. The single-phase converter transformer with an outlet structure according to claim 1, characterized in that: The bottom surface of the transformer body (1) is fixedly connected to a base (4).

5. The single-phase converter transformer with an outlet structure according to claim 1, characterized in that: A warning sign (7) is provided on the right side of the transformer body (1), and the left side of the warning sign (7) is fixedly connected to the right side of the transformer body (1).

6. The single-phase converter transformer with an outlet structure according to claim 1, characterized in that: A sealing ring (12) is fixedly connected to the inner wall of the through opening (13), and the sealing ring (12) is made of rubber.

7. The single-phase converter transformer with an outlet structure according to claim 1, characterized in that: The left and right side surfaces of the transformer body (1) are both fixedly connected with reinforcement blocks (6), and the bottom surface of each reinforcement block (6) is fixedly connected to the upper surface of the base (4).

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