Multifunctional oil-casing outlet installation structure

Abstract

The utility model relates to a kind of multifunctional oil-oil casing outlet installation structure, including first outlet box and second outlet box, wherein first outlet box one end is equipped with the first end plate with first mounting hole, and the first end plate is sealingly connected with the oil tank lifting seat on transformer oil tank, and first outlet box other end is sealingly communicated with second outlet box one end, and the second outlet box other end is equipped with the second end plate with second mounting hole, the first outlet box and second outlet box are both equipped with insulation clamping piece, in addition, the second outlet box is equipped with pressure release valve interface and oil circuit interface in the side away from second end plate.The utility model can realize the transformer outlet installation needs of multiple functions, while being able to guarantee the creepage distance inside outlet box meets insulation requirement.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically a multifunctional oil-oil bushing outlet installation structure. Background Technology

[0002] The design of transformer outgoing line structure is crucial for the safety, reliability, and ease of maintenance of power transmission. However, traditional transformer oil-bushing outgoing line installation structures have many limitations. For example, they cannot be flexibly adjusted according to actual needs, especially during transformer testing, where it is difficult to quickly and easily adjust the outgoing line structure to meet different test conditions. Furthermore, traditional transformer oil-bushing outgoing line structures struggle to simultaneously ensure electrical insulation and mechanical support stability. Particularly when connecting internal lead cables to bushing terminals and plug-in oil terminals, existing fixing methods cannot effectively guarantee internal creepage distances under high voltage, increasing the risk of insulation failure. Summary of the Invention

[0003] The purpose of this utility model is to provide a multifunctional oil-oil bushing outlet installation structure, which can meet the needs of transformer outlet installation for multiple functions, while ensuring that the creepage distance inside the outlet box meets the insulation requirements.

[0004] The objective of this utility model is achieved through the following technical solution: A multifunctional oil-oil bushing outlet installation structure includes a first outlet box and a second outlet box. One end of the first outlet box is provided with a first end plate with a first mounting hole, and the first end plate is sealed and fixedly connected to an oil tank riser seat provided on the transformer oil tank. The other end of the first outlet box is sealed and connected to one end of the second outlet box, and the other end of the second outlet box is provided with a second end plate with a second mounting hole. Insulating clamps are provided in both the first and second outlet boxes. In addition, a pressure relief valve interface and an oil circuit interface are provided on the side of the second outlet box away from the second end plate.

[0005] Both the first and second outlet boxes are L-shaped. The first outlet box has a first flange at the end away from the first end plate, and the second outlet box has a second flange at the end away from the second end plate. The first flange and the second flange are sealed and fixedly connected.

[0006] The insulating clamping component includes a lead clamping plate and a connecting plate. Each of the two lead clamping plates has a clamping half hole on an adjacent side. The connecting plate is L-shaped, and both ends of each lead clamping plate are fixed to the vertical part of the corresponding side connecting plate.

[0007] The oil tank riser is provided with a riser flange at its end. The outer edge of the first end plate is located outside the first outlet box and forms an end plate flange portion that is sealed and fixedly connected to the riser flange.

[0008] When the oil-oil bushing and the plug-in terminal are electrically connected, the oil-oil bushing is sealed and installed at the first mounting hole of the first end plate. The second end plate of the second outlet box is arranged facing downward, and the plug-in terminal is sealed and installed at the second mounting hole of the second end plate. The oil-oil bushing and the plug-in terminal are connected by a connecting lead, and the connecting lead is supported and fixed by an insulating clamp.

[0009] The pressure relief valve interface on the second outlet box is equipped with a pressure relief valve, and the pressure relief valve is connected to the relief pipeline. The oil circuit interface on the second outlet box is connected to the oil tank through the connecting oil circuit, and the connecting oil circuit is equipped with a gas relay and an oil circuit control valve for controlling the on / off of the oil circuit.

[0010] When conducting the oil-oil bushing test, an oil-oil bushing is sealed and installed at the first mounting hole of the first end plate. The second end plate of the second outlet box is positioned facing upwards, and a test bushing is sealed and installed at the second mounting hole of the second end plate. The oil-oil bushing and the test bushing are connected by a first test lead, and the first test lead is supported and fixed by an insulating clamp.

[0011] When conducting the oil-oil bushing test, the first and second outlet boxes of the corresponding phases on both sides of the transformer are rotated outward by a set angle.

[0012] The second end plate is provided with a riser seat for the outlet box, and the test sleeve is sealed and installed on the riser seat for the outlet box.

[0013] When conducting the oil-free to oil-coated bushing test, the second end plate of the second outlet box is positioned facing upwards, and a test bushing is sealed and installed at the second mounting hole of the second end plate. The device to be tested inside the transformer tank and the test bushing are connected by a second test lead, and the second test lead is supported and fixed by an insulating clamp. The second test lead passes through the first mounting hole of the first end plate, and the first outlet box is connected to the transformer tank through the first mounting hole.

[0014] The advantages and positive effects of this utility model are as follows: 1. This utility model can be used for the electrical connection between oil-oil bushing and plug-in terminal. In this case, the second end plate on the second outlet box for installing the plug-in terminal can be adjusted to face downwards. In addition, this utility model can also meet the needs of transformer testing, including the testing and installation needs with and without oil-oil bushing. In this case, the second outlet box can be adjusted to face upwards with the second end plate. At the same time, the first outlet boxes on both sides of the transformer corresponding to the phase can be rotated outwards by a set angle to obtain the external air insulation distance. Therefore, this application can realize the outlet installation needs of multiple functions without changing the structure of the first outlet box and the second outlet box.

[0015] 2. This utility model is equipped with insulating clamps in both the first and second outlet boxes to ensure that the lead cable is located as close as possible to the center line of the outlet box. This ensures stable support and also effectively maintains the distance between the lead cable and the inner wall of the outlet box, thereby ensuring that the creepage distance inside the outlet box meets the insulation requirements of high voltage.

[0016] 3. The insulating clamp of this utility model includes two lead clamping plates with clamping half holes. After the two ends of the two lead clamping plates are fixed to the connecting plates on the corresponding sides, the clamping half holes on the adjacent sides of the two lead clamping plates form a complete round hole for clamping and fixing the corresponding lead cable. This makes it convenient for the insulating clamp and the lead cable to be installed as one unit, and then the whole unit is put into the outlet box for installation.

[0017] 4. The insulating clamping component of this utility model includes two L-shaped connecting plates and two lead wire clamping plates with clamping half holes. In this way, this utility model can replace the lead wire clamping plates with clamping half holes of different diameters according to the diameter specifications of the lead wires, and can also replace the connecting plates with vertical sections of different lengths according to the diameter specifications of the outlet box, thereby improving the flexibility and applicability of this utility model.

[0018] 5. In this invention, when the oil-to-oil bushing and the plug-in terminal are electrically connected, the first outlet box can be isolated from the transformer oil tank, thereby making the interior of the first outlet box and the interior of the second outlet box separately connected and sealed and connected to the oil conservator. This ensures that the oil-to-oil bushing, plug-in terminal and other related electrical components are not affected by the transformer oil inside the transformer oil tank. On the other hand, the oil conservator can be used to compensate for changes in oil volume in the first and second outlet boxes. Furthermore, when the oil pressure inside the two outlet boxes is too high, the pressure relief valve on the second outlet box can automatically open to release the pressure without affecting the operation inside the transformer oil tank.

[0019] 6. This utility model can meet the line installation requirements of different tests as needed. When performing an oil-oil bushing test, the first and second outlet boxes are kept isolated from the transformer oil tank. When performing an oil-free bushing test, the first and second outlet boxes are connected to the transformer oil tank. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the first embodiment of the present invention in use. Figure 1a for Figure 1 Enlarged view of point A in the image. Figure 1b for Figure 1 Enlarged view of point B in the image. Figure 2 for Figure 1 A three-dimensional schematic diagram of the present invention. Figure 3 This is a cross-sectional view of the second embodiment of the present invention in use. Figure 3a for Figure 3 Enlarged view of point C in the image. Figure 4 for Figure 3 A three-dimensional schematic diagram of the present invention. Figure 5 This is a cross-sectional view of the third embodiment of the present invention in its usage state. Figure 6 for Figure 1 A schematic diagram of the structure of the insulating clamping component.

[0021] Wherein, 1 is the oil-to-oil bushing, 2 is the first outlet box, 201 is the first end plate, 202 is the first flange, 203 is the first mounting hole, 3 is the plug-in terminal, 4 is the second outlet box, 401 is the second end plate, 4011 is the outlet box riser, 402 is the second flange, 403 is the second mounting hole, 5 is the connecting lead, 6 is the insulating clamp, 601 is the lead clamp plate, 602 is the connecting plate, 7 is the transformer oil tank, 701 is the transformer oil tank. 702 is the oil tank riser, 8 is the transformer oil, 8 is the oil conservator, 801 is the oil conservator capsule, 802 is the oil level gauge, 803 is the oil conservator oil, 804 is the first oil circuit, 805 is the gas relay, 806 is the dehumidifier, 807 is the second oil circuit, 9 is the first support, 10 is the pressure relief valve, 11 is the first test lead, 12 is the test bushing, 13 is the second support, 14 is the second test lead, and 15 is the release oil circuit. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figures 1-5 As shown, this utility model includes a first outlet box 2 and a second outlet box 4, wherein... Figure 1a As shown, one end of the first outlet box 2 is provided with a first end plate 201 with a first mounting hole 203, and the first end plate 201 is sealed and fixedly connected to the tank riser 701 provided on the transformer tank 7. The other end of the first outlet box 2 is sealed and connected to one end of the second outlet box 4, and as shown... Figure 1b As shown, the other end of the second outlet box 4 is provided with a second end plate 401 with a second mounting hole 403. The second end plate 401 is sealed to the corresponding electrical component. Insulating clamps 6 are provided in both the first outlet box 2 and the second outlet box 4. In addition, as shown in the figure, Figure 1As shown, the second outlet box 4 is provided with a pressure relief valve interface and an oil circuit interface on the side away from the second end plate 401. The pressure relief valve interface and the oil circuit interface can be equipped with interface control valves to control the opening and closing of the interfaces as needed. These interface control valves are commercially available products and are known in the art. When the interface control valve is closed, the interior of the second outlet box 4 remains sealed.

[0024] like Figure 2 and Figure 4 As shown, both the first outlet box 2 and the second outlet box 4 are L-shaped. The first outlet box 2 has a first flange 202 at the end away from the first end plate 201, and the second outlet box 4 has a second flange 402 at the end away from the second end plate 401. The first flange 202 and the second flange 402 are sealed and fixedly connected, thereby achieving a sealed connection between the first outlet box 2 and the second outlet box 4. A sealing ring can be provided between the first flange 202 and the second flange 402 to ensure the connection, which is a well-known technology in the art.

[0025] like Figure 6 As shown, the insulating clamping member 6 includes a lead clamping plate 601 and a connecting plate 602. Each of the two lead clamping plates 601 has a clamping half hole on an adjacent side. The connecting plate 602 is L-shaped, and both ends of each lead clamping plate 601 are fixed to the vertical part of the corresponding side connecting plate 602. The horizontal part of the connecting plate 602 is fixed to the inner wall of the first outlet box 2 or the second outlet box 4.

[0026] During installation, after the two lead wire clamping plates 601 are fixed at both ends to the corresponding connecting plates 602, the clamping half-holes on the adjacent sides of the two lead wire clamping plates 601 form complete circular holes for clamping and fixing the corresponding lead wires. This facilitates the installation of the insulating clamping component 6 and the lead wires as a single unit, which is then placed into the outlet box for installation. Furthermore, this invention allows for the replacement of lead wire clamping plates 601 with clamping half-holes of different diameters according to the actual diameter of the lead wires. It also allows for the replacement of connecting plates 602 with vertical sections of different lengths according to the actual diameter of the outlet box, thus improving the flexibility and applicability of this invention. The insulating clamping component 6 can be made of insulating materials such as wood.

[0027] like Figure 1 As shown, the end of the oil tank riser 701 is provided with a riser flange. The outer edge of the first end plate 201 is located outside the first outlet box 2 and forms an end plate flange portion that is sealed and fixedly connected to the riser flange. A sealing ring can be provided between the end plate flange portion and the riser flange to ensure a seal. Figure 1 As shown, the first end plate 201 can be used to install the oil-oil sleeve 1 as needed, or as... Figure 5 As shown, the first end plate 201 is only for the second test lead 14 to pass through.

[0028] like Figure 1 , Figure 3 and Figure 5 As shown, the electrical components corresponding to the second outlet box 4 are all equipped with mounting flanges, and the mounting flanges are sealed and fixed at the second mounting holes 403 on the second end plate 401. A sealing ring is provided between the mounting flange and the second end plate 401 to ensure a seal. Figure 1 As shown, the second end plate 401 can be used to mount the plug-in terminal 3 as needed, or as... Figure 3 and Figure 5 As shown, the second end plate 401 is used to install the test sleeve 12.

[0029] This invention enables the electrical connection of different electrical components by adjusting the first outlet box 2 and the second outlet box 4, thereby achieving different functions. Example

[0030] like Figure 1 and Figure 2 As shown, this embodiment is used for the electrical connection between the oil-to-oil sleeve 1 and the plug-in terminal 3, wherein... Figure 1a As shown, the oil-to-oil bushing 1 is equipped with a bushing flange that is sealed and installed at the first mounting hole 203 of the first end plate 201. A sealing ring can be provided between the bushing flange and the first end plate 201 to ensure a seal, while also ensuring the sealed isolation between the first outlet box 2 and the transformer oil tank 7. Figure 1b As shown, the plug-in terminal 3 is provided with a terminal mounting flange, and the terminal mounting flange is sealed and installed at the second mounting hole 403 of the second end plate 401. Similarly, a sealing ring can be provided between the terminal mounting flange and the second end plate 401 to ensure sealing, thereby achieving internal sealing of the first outlet box 2 and the second outlet box 4.

[0031] like Figure 1 and Figure 2 As shown, the oil-oil bushing 1 and the plug-in terminal 3 are connected by a connecting lead 5. The connecting lead 5 is supported and fixed in both the first outlet box 2 and the second outlet box 4 by an insulating clamp 6, and the connecting lead 5 is positioned as close as possible to the center line of the outlet box. In this way, the insulating clamp 6 can not only ensure the stable support of the connecting lead 5, but also effectively ensure the distance between the connecting lead 5 and the inner wall of the outlet box, thereby ensuring that the creepage distance inside the outlet box meets the insulation requirements of high voltage.

[0032] like Figure 1 and Figure 2As shown, in this embodiment, the second end plate 401 of the second outlet box 4 is arranged facing downwards. At the same time, a pressure relief valve 10 is installed on the pressure relief valve interface on the upper side of the second outlet box 4, and the pressure relief valve 10 is connected to a release pipeline 15. The oil circuit interface on the upper side of the second outlet box 4 is connected to the oil tank 8 located on the upper side of the first outlet box 2 through the connecting oil circuit. At this time, the transformer oil tank 7 contains transformer oil 702. Since the first outlet box 2 is sealed and isolated from the transformer oil tank 7, the first outlet box 2, the second outlet box 4 and the oil tank 8 all contain oil tank oil 803, which requires a separate oil injection and discharge control valve.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, the connecting oil circuit includes a first oil circuit 804 and a second oil circuit 807, wherein the second oil circuit 807 is connected to the second terminal box 4 on each phase of the transformer, and one end of the first oil circuit 804 is connected to the second oil circuit 807 and the other end is connected to the oil conservator 8; as Figure 1 As shown, the first oil circuit 804 is equipped with a gas relay 805 and an oil circuit control valve for controlling the on / off state of the oil circuit. Both the gas relay 805 and the oil circuit control valve are commercially available products.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, the oil tank 8 is equipped with an oil tank capsule 801, and the oil tank capsule 801 is equipped with an oil level gauge 802. The oil tank capsule 801 is connected to a dehumidifier 806 via a pipeline. In addition, the oil tank capsule 801 is also connected to an oil filling pipeline, and the oil filling pipeline is equipped with an oil filling control valve. The above structures are all technologies known in the art.

[0035] In addition, to ensure stable support, the second end plate 401 at the lower end of the second outlet box 4 is supported by the first bracket 9.

[0036] The working principle of this embodiment is as follows: In this embodiment, the oil-oil bushing 1 is sealed and installed on the first end plate 201 of the first outlet box 2. Simultaneously, the first end plate 201 achieves sealed isolation between the first outlet box 2 and the transformer oil tank 7. The plug-in terminal 3 is sealed and installed on the second end plate 401 of the second outlet box 4, ensuring the internal sealing of both the first and second outlet boxes 2 and 4. The oil conservator 8 is connected to the second outlet box 4, thus compensating for changes in oil volume within both outlet boxes. When the oil pressure inside the two outlet boxes is too high, the pressure relief valve 10 can automatically open to release the pressure. Since the oil-oil bushing 1, plug-in terminal 3, and other electrical components in this embodiment are independently located inside the first and second outlet boxes 2 and 4, they are not affected by the transformer oil 702 inside the transformer oil tank 7, and conversely, they do not affect the internal operation of the transformer oil tank 7. Example

[0037] like Figure 3 and Figure 4 As shown, this embodiment is used for the test installation of the oil-oil sleeve 1. The difference between this embodiment and Embodiment 1 is that the second end plate 401 of the second outlet box 4 faces upward, and the test sleeve 12 is installed on the second end plate 401. The oil-oil sleeve 1 and the test sleeve 12 are connected by the first test lead 11. In addition, since this embodiment is for testing purposes, the pressure relief valve interface on the second outlet box 4 may not be equipped with the pressure relief valve 10, and the oil circuit interface on the second outlet box 4 may not be connected to the oil tank 8. Both interfaces are kept closed to ensure the internal sealing of the second outlet box 4, which also facilitates the adjustment of the direction and angle of the second outlet box 4. If, according to the test situation, it is necessary to install the pressure relief valve 10 or connect it to the oil tank 8, the pressure relief valve 10 can be connected to a release pipeline in the form of a hose, and the oil circuit interface can be connected to the oil tank 8 through a connecting pipeline in the form of a hose. The hose needs to have sufficient length to meet the test adjustment needs, and this can also further improve the flexibility of this utility model.

[0038] In this embodiment, the installation method of the oil-oil sleeve 1 is the same as in Embodiment 1. The test sleeve 12 is provided with a first mounting flange, which is sealed and installed at the second mounting hole 403 of the second end plate 401. A sealing ring is provided between the first mounting flange and the second end plate 401 to ensure the internal sealing of the second outlet box 4. In this embodiment, the test sleeve 12 is a conventional oil-air test sleeve.

[0039] In this embodiment, a cable outlet box riser 4011 may be provided in the middle of the second end plate 401 as needed, such as... Figure 3a As shown, the first mounting flange on the test sleeve 12 is sealed and installed on the outlet box riser 4011.

[0040] In this embodiment, both the first outlet box 2 and the second outlet box 4 are provided with insulating clamps 6 for supporting and fixing the first test lead 11. Similar to Embodiment 1, the insulating clamps 6 can ensure stable support while also effectively ensuring that the creepage distance inside the outlet box meets the insulation requirements of high voltage.

[0041] like Figure 4 As shown, in this embodiment, in addition to rotating the second terminal box 4 180° around the horizontal axis so that the second end plate 401 faces upward, the first terminal box 2 and the second terminal box 4 of the corresponding phases on both sides of the transformer are also rotated outward by 60° to obtain the external air insulation distance.

[0042] During installation in this embodiment, the second flange 402 on the second outlet box 4 is rotated 180° and then fixed to the first flange 202 on the first outlet box 2, thereby achieving the orientation adjustment of the second outlet box 4. Meanwhile, the first end plate 201 at the lower end of the first outlet box 2, located on the outer side of the outlet box, is rotated outward by 60° and then fixed to the upper end of the transformer riser 701 with the riser flange, thereby achieving the angle adjustment of the first outlet box 2 and the second outlet box 4.

[0043] In addition, since the direction and angle of the second outlet box 4 have changed in this embodiment, the second bracket 13 supports the lower side of the second outlet box 4 to ensure stable support. Example

[0044] This embodiment is used for test installation of oil-free and oil-insulated bushing 1. The difference between this embodiment and embodiment two is that the device to be tested inside the transformer oil tank 7 is directly connected to the test bushing 12 located on the second outlet box 4 through the second test lead 14. Figure 5 As shown, the second test lead 14 passes through the first mounting hole 203 located on the first end plate 201, and at this time, the first outlet box 2 is connected to the transformer oil tank 7 through the first mounting hole 203, that is, the connection between the first outlet box 2, the second outlet box 4 and the transformer oil tank 7 is realized. Additionally, as shown... Figure 5 As shown, since this embodiment achieves electrical connection only through the second test lead 14, the number of insulating clamps 6 inside the first outlet box 2 is increased to ensure that the second test lead 14 is located as close as possible to the center line of the first outlet box 2, thereby ensuring that the creepage distance inside the outlet box meets the insulation requirements of high voltage.

Claims

1. A multifunctional oil-oil casing outlet installation structure, characterized in that: It includes a first outlet box (2) and a second outlet box (4), wherein one end of the first outlet box (2) is provided with a first end plate (201) with a first mounting hole (203), and the first end plate (201) is sealed and fixedly connected to the oil tank riser (701) provided on the transformer oil tank (7). The other end of the first outlet box (2) is sealed and connected to one end of the second outlet box (4), and the other end of the second outlet box (4) is provided with a second end plate (401) with a second mounting hole (403). Both the first outlet box (2) and the second outlet box (4) are provided with insulating clamps (6). In addition, the second outlet box (4) is provided with a pressure relief valve interface and an oil circuit interface on the side away from the second end plate (401).

2. The multifunctional oil-oil casing outlet installation structure according to claim 1, characterized in that: Both the first outlet box (2) and the second outlet box (4) are L-shaped. The first outlet box (2) has a first flange (202) at the end away from the first end plate (201), and the second outlet box (4) has a second flange (402) at the end away from the second end plate (401). The first flange (202) and the second flange (402) are sealed and fixedly connected.

3. The multifunctional oil-oil casing outlet installation structure according to claim 1, characterized in that: The insulating clamping member (6) includes a lead clamping plate (601) and a connecting plate (602), wherein the two lead clamping plates (601) are provided with clamping half holes on adjacent sides, the connecting plate (602) is L-shaped, and the two ends of each lead clamping plate (601) are respectively fixed to the vertical part of the corresponding side connecting plate (602).

4. The multifunctional oil-oil casing outlet installation structure according to claim 1, characterized in that: The oil tank riser (701) is provided with a riser flange at its end. The outer edge of the first end plate (201) is located outside the first outlet box (2) and forms an end plate flange portion that is sealed and fixedly connected to the riser flange.

5. The multifunctional oil-oil casing outlet installation structure according to claim 1, characterized in that: When the oil-oil sleeve (1) is electrically connected to the plug-in terminal (3), the oil-oil sleeve (1) is sealed and installed at the first mounting hole (203) of the first end plate (201). The second end plate (401) of the second outlet box (4) is arranged facing downward, and the plug-in terminal (3) is sealed and installed at the second mounting hole (403) of the second end plate (401). The oil-oil sleeve (1) and the plug-in terminal (3) are connected by a connecting lead (5), and the connecting lead (5) is supported and fixed by an insulating clamp (6).

6. The multifunctional oil-oil casing outlet installation structure according to claim 5, characterized in that: The pressure relief valve (10) is installed on the pressure relief valve interface of the second outlet box (4), and the pressure relief valve (10) is connected to the release pipeline (15). The oil circuit interface on the second outlet box (4) is connected to the oil tank (8) through the connecting oil circuit, and the connecting oil circuit is equipped with a gas relay (805) and an oil circuit control valve for controlling the opening and closing of the oil circuit.

7. The multifunctional oil-oil casing outlet installation structure according to claim 1, characterized in that: When conducting the test of the oil-oil bushing (1), the oil-oil bushing (1) is sealed and installed at the first mounting hole (203) of the first end plate (201), the second end plate (401) of the second outlet box (4) is set facing upward, and the test bushing (12) is sealed and installed at the second mounting hole (403) of the second end plate (401). The oil-oil bushing (1) and the test bushing (12) are connected by a first test lead (11), and the first test lead (11) is supported and fixed by an insulating clamp (6).

8. The multifunctional oil-oil casing outlet installation structure according to claim 7, characterized in that: When conducting the test of the oil-oil bushing (1), the first outlet box (2) and the second outlet box (4) of the corresponding phases on both sides of the transformer are rotated outward by a set angle.

9. The multifunctional oil-oil casing outlet installation structure according to claim 7, characterized in that: The second end plate (401) is provided with a junction box riser (4011), and the test sleeve (12) is sealed and installed on the junction box riser (4011).

10. The multifunctional oil-oil casing outlet installation structure according to claim 1, characterized in that: When conducting the oil-free-oil bushing (1) test, the second end plate (401) of the second outlet box (4) is set facing upward, and the test bushing (12) is sealed and installed at the second mounting hole (403) of the second end plate (401). The device to be tested in the transformer tank (7) and the test bushing (12) are connected by the second test lead (14), and the second test lead (14) is supported and fixed by the insulating clamp (6). The second test lead (14) passes through the first mounting hole (203) of the first end plate (201), and the first outlet box (2) is connected to the transformer tank (7) through the first mounting hole (203).

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