Oil-immersed transformer leak-proof three-phase integrated wiring assembly

Abstract

The utility model discloses a leakage-proof three-phase integrated wiring assembly for an oil-immersed transformer, comprising a bushing for fixed connection with an oil tank of the transformer, and a three-phase straight-through head sleeved on the bushing, a cable is inserted in the three-phase straight-through head, the bushing is provided with one end extending into the oil tank, a sealing ring for preventing oil leakage is fixedly provided on a side wall of the bushing located in the oil tank, the three-phase straight-through head is fixedly connected to the bushing, a straight-through head terminal is fixedly provided on one end of the cable located in the three-phase straight-through head, and the cable is plugged into the bushing through the straight-through head terminal; the utility model integrates three independent wiring heads originally in the transformer into a wiring assembly containing three cables, and the connection method is a corresponding connection between the bushing and the three-phase straight-through head, the bushing is fixedly installed on the outside of the oil tank, the transformer only needs one opening and is fixed, oil leakage can be avoided, and wiring is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field related to transformer equipment, in particular to a leakage-proof three-phase integrated wiring assembly for an oil-immersed transformer. Background Art

[0002] Generally, the top of an oil-immersed transformer will lead upwards to the three-phase live wire terminal and the neutral wire terminal, so there are generally four terminals. As the oil-immersed transformer is used for a period of time, oil will leak out, and the four terminals will undoubtedly increase the risk of oil unloading.

[0003] For example, an existing quick connection device for incoming and outgoing lines and an air-cooled transformer, with patent number CN202311116619.4, includes an air-cooled transformer assembly, a first connecting piece, an energy storage assembly, a knocking assembly, a collecting assembly, including a brush arranged in a dust removal box and a storage box arranged on the end surface of the dust removal box.

[0004] And a transformer for power transmission and distribution, patent number CN202310875145.5, including: an oil tank, cooling fins, a top cover, a terminal head, an oil pillow, an oil supply pipe, an oil outlet pipe and an iron core coil assembly, cooling fins are fixedly installed on the two side surfaces of the oil tank, a top cover is fixedly installed on the top surface of the oil tank, and a terminal head is fixedly installed on the top of the top cover.

[0005] The structures disclosed in the above two patent documents both have at least four terminals drawn out on the surface, which is a four-terminal terminal structure designed for general transformers; the transformer core of the oil-immersed transformer is immersed in the middle of the oil tank, and then the oil tank shell is electrically connected with a joint. The traditional wiring is three-phase separated, so there are many openings on the oil tank, which is more prone to oil leakage risks, and maintenance and inspection are more troublesome. The more terminals there are, the greater the risk of oil leakage in the transformer. Therefore, a wiring structure that can reduce this risk is needed. Utility Model Content

[0006] The utility model aims to provide a leakage-proof three-phase integrated wiring assembly for an oil-immersed transformer, so as to overcome the shortcomings in the prior art.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A leakage-proof three-phase integrated wiring assembly for an oil-immersed transformer comprises a bushing for fixed connection with an oil tank of the transformer, and also comprises a three-phase straight-through head sleeved on the bushing, a cable is inserted in the three-phase straight-through head, the bushing is provided with one end extending into the oil tank, a sealing ring for preventing oil leakage is fixedly provided on a side wall of the bushing located in the oil tank, the three-phase straight-through head is fixedly connected to the bushing, a straight-through head terminal is fixedly provided at one end of the cable located in the three-phase straight-through head, and the cable is plugged into the bushing through the straight-through head terminal.

[0009] To further explain, three conductive copper sleeves are fixedly arranged inside the bushing, and there are three straight-through terminals, which are respectively plugged into the conductive copper sleeves in a one-to-one correspondence.

[0010] To further explain, the cable includes a wire core and an insulating layer, a first copper sleeve is integrally extended from one end of the through-head terminal, the first copper sleeve of the through-head terminal is sleeved on the outside of the cable, one end of the through-head terminal is threadedly connected with a nut, and the through-head terminal is fixed in the three-phase through-head by tightening the nut.

[0011] To further explain, the three-phase straight-through head cover is provided with a connecting assembly, and the three-phase straight-through head is fixedly connected to the sleeve through the connecting assembly.

[0012] Further, the connection assembly includes a plurality of M6 inserts embedded and fixedly disposed on one side of the sleeve away from the oil tank, and the plurality of M6 inserts are arranged in a circular array on one side of the sleeve;

[0013] The M6 ​​insert is threadedly connected with a lifting eye screw, one end of which is buckled with a PT fixing hook, the three-phase straight-through head is sleeved with a pressure plate, one end of the PT fixing hook passes through the pressure plate and is sleeved with a butterfly nut, which abuts against one side of the pressure plate.

[0014] To further explain, the butterfly nut is threadedly connected to the PT fixing hook.

[0015] To further explain, the three-phase straight-through head is provided with a limit platform, and the pressure plate abuts against the surface of the limit platform.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] The utility model integrates three independent wiring heads in the original transformer into a wiring assembly containing three cables, and the connection method is the corresponding connection of the bushing and the three-phase straight-through head. The bushing is fixedly installed on the outside of the oil tank. The transformer only needs one opening and is fixed, which can avoid oil leakage and make wiring convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the casing of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a three-phase straight-through connector of the utility model.

[0021] Notes on the attached drawings:

[0022] 1. Three-phase straight-through connector; 2. Insulation layer; 3. Wire core; 4. Nut; 5. First copper sleeve; 6. Conductive copper sleeve; 7. Eye screw; 8. M6 insert; 9. Sealing ring; 10. PT fixing hook; 11. Bushing; 12. Pressure plate; 13. Butterfly nut; 14. Straight-through connector terminal; 15. Limiting piece. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When the number of an element is referred to as "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific implementations and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] The present invention is described in detail below in conjunction with the embodiments shown in the accompanying drawings:

[0027] like Figure 1-3As shown, in this embodiment, a leakage-proof three-phase integrated wiring assembly for oil-immersed transformers is provided, including a bushing 11 for fixed connection with the oil tank of the transformer, the bushing 11 is provided with an end extending into the oil tank, and a part of the bushing 11 will contact the oil in the transformer oil tank, wherein the assembly also includes a three-phase straight-through head 1 sleeved on the bushing 11, a cable is inserted in the three-phase straight-through head 1, and a sealing ring 9 for preventing oil leakage is fixedly provided on one side wall of the bushing 11 located in the oil tank, and the sealing ring 9 can effectively prevent the oil from overflowing and leaking outward. The three-phase straight-through head 1 is fixedly connected to the bushing 11, and a straight-through head terminal 14 is fixedly provided at one end of the cable located in the three-phase straight-through head 1, and the cable is plugged into the bushing 11 through the straight-through head terminal 14; further elaborated, three conductive copper sleeves 6 are fixedly provided inside the bushing 11, and there are three straight-through head terminals 14, and the straight-through head terminals 14 are respectively plugged into the conductive copper sleeves 6 one by one. The conductive copper sleeve 6 abuts against the through-head terminal 14, and the through-head terminal 14 abuts against the cable, so that the purpose of internal and external electricity conduction can be achieved.

[0028] In this embodiment, the cable includes a core 3 and an insulating layer 2, and the insulating layer 2 is provided to prevent leakage. A first copper sleeve 5 is integrally extended from one end of the through-head terminal 14, and the first copper sleeve 5 is integrally manufactured by the through-head terminal 14; the first copper sleeve 5 of the through-head terminal 14 is sleeved on the outside of the cable, and the end of the specific cable exposes the core 3, and the first copper sleeve 5 is sleeved into the exposed part of the core 3 and crimped to gather multiple cores 3. Please refer to Figure 3 One end of the straight-through head terminal 14 is provided with an external thread, and the straight-through head terminal 14 is connected to a nut 4 through the external thread. The straight-through head terminal 14 is tightened and fixed in the three-phase straight-through head 1 by the nut 4; specifically, a limit plate 15 is fixedly arranged in a card-type manner inside the three-phase straight-through head 1, and a through hole is opened in the middle of the limit plate 15. The straight-through head terminal 14 passes through the through hole of the limit plate 15 and is locked with the nut. Therefore, the straight-through head terminal 14 can be locked in the three-phase straight-through head 1 to prevent the cable from moving outward when being plugged into the conductive copper sleeve 6 in the sleeve 11, making its plug-in more reliable and stable.

[0029] In this embodiment, in order to further ensure that the three-phase straight-through head 1 will not fall off the sleeve 11, the three-phase straight-through head 1 is provided with a connecting component, and the three-phase straight-through head 1 is fixedly connected to the sleeve 11 through the connecting component. After the connecting component is locked, it can be ensured that the three-phase straight-through head 1 will not fall off the sleeve 11 during use, thereby ensuring the reliability of the installation and reducing the occurrence of poor contact.

[0030] Further, the connection assembly includes a plurality of M6 inserts 8 embedded and fixedly disposed on one side of the sleeve 11 away from the oil tank, and the plurality of M6 inserts 8 are arranged in a circular array on one side of the sleeve 11;

[0031] The M6 ​​insert 8 is threadedly connected with a lifting eye screw 7, one end of which is buckled with a PT fixing hook 10, and the three-phase straight-through head 1 is sleeved with a pressure plate 12, one end of the PT fixing hook 10 passes through the pressure plate 12 and is sleeved with a butterfly nut 13, which is threadedly connected to the PT fixing hook 10; the butterfly nut 13 abuts against one side of the pressure plate 12. The three-phase straight-through head 1 is provided with a limit platform, and the pressure plate 12 abuts against the surface of the limit platform. When the butterfly nut 13 is continuously tightened, it will support the pressure plate 12, and the continuous tightening process will cause the pressure plate 12 to continuously move downward relative to the three-phase straight-through head 1, that is, the sleeve 11 pulls the three-phase straight-through head 1 downward through the PT fixing hook 10 and the pressure plate 12 to tighten and install it.

[0032] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned 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. For ordinary technicians in this field, they can make several modifications and improvements without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A leakage-proof three-phase integrated wiring assembly for an oil-immersed transformer, characterized in that: It includes a bushing for fixed connection with the oil tank of the transformer, and also includes a three-phase straight-through head sleeved on the bushing, a cable is inserted in the three-phase straight-through head, the bushing is provided with one end extending into the oil tank, a sealing ring for preventing oil leakage is fixedly provided on one side wall of the bushing located in the oil tank, the three-phase straight-through head is fixedly connected to the bushing, one end of the cable located in the three-phase straight-through head is fixedly provided with a straight-through head terminal, and the cable is plugged into the bushing through the straight-through head terminal.

2. The leakproof three-phase integrated wiring assembly for oil-immersed transformer according to claim 1, characterized in that: Three conductive copper sleeves are fixedly arranged inside the casing, and there are three straight-through terminals, which are respectively plugged into the conductive copper sleeves in a one-to-one correspondence.

3. The leakproof three-phase integrated wiring assembly for oil-immersed transformer according to claim 1, characterized in that: The cable includes a wire core and an insulating layer. A first copper sleeve is integrally extended from one end of the straight-through terminal. The first copper sleeve of the straight-through terminal is sleeved on the outside of the cable. A nut is threadedly connected to one end of the straight-through terminal. The straight-through terminal is fixed in the three-phase straight-through terminal by tightening the nut.

4. The leakproof three-phase integrated wiring assembly for oil-immersed transformer according to claim 1, characterized in that: The three-phase straight-through head cover is provided with a connecting component, and the three-phase straight-through head is fixedly connected to the sleeve through the connecting component.

5. The leakproof three-phase integrated wiring assembly for oil-immersed transformer according to claim 4, characterized in that: The connection assembly includes a plurality of M6 inserts embedded and fixedly arranged on one side of the sleeve away from the oil tank, and the plurality of M6 inserts are arranged in a circular array on one side of the sleeve; The M6 ​​insert is threadedly connected with a lifting eye screw, one end of which is buckled with a PT fixing hook, the three-phase straight-through head is sleeved with a pressure plate, one end of the PT fixing hook passes through the pressure plate and is sleeved with a butterfly nut, which abuts against one side of the pressure plate.

6. The leakproof three-phase integrated wiring assembly for oil-immersed transformer according to claim 5, characterized in that: The butterfly nut is threadedly connected to the PT fixing hook.

7. The leakproof three-phase integrated wiring assembly for oil-immersed transformer according to claim 5, characterized in that: The three-phase straight-through head is provided with a limit platform, and the pressure plate abuts against the surface of the limit platform.

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