Fuse and transformer

Abstract

The utility model discloses a fuse and a transformer, and relates to the technical field of transformers, the fuse comprises a sleeve and two conductive members, the two conductive members are respectively arranged at two ends of the sleeve in the axial direction, the peripheral wall of the sleeve is provided with a mounting convex part, and the mounting convex part is arranged close to one conductive member. According to the technical scheme, the mounting convex part is arranged on the periphery of the sleeve, so that the sleeve can be mounted firstly, and the sleeve with light weight is more convenient and faster to mount, so that the convenience of mounting, dismounting and replacing the fuse is improved, the operation and maintenance cost of the transformer is reduced, and the overall operation efficiency of a power system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a fuse and a transformer. BACKGROUND

[0002] In the power system, the fuse is widely used in the short circuit and overload protection of the key equipment such as the transformer as an important protection element. At present, the fuse core of the fuse is packaged through the sealed sleeve, one end of the fuse core is provided with a pull rod, and the fuse is generally installed with the transformer oil tank through the pull rod or the cover on the pull rod. The fuse core and the sleeve of the fuse are installed on the oil tank as a whole, and the weight of each fuse is at least 15 kg, which is heavy and inconvenient to install. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a fuse and a transformer, which aims to improve the convenience of fuse installation.

[0004] In order to achieve the above purpose, the fuse provided by the present application comprises a sleeve and two conductive parts, the two conductive parts are arranged at two ends of the sleeve in the axial direction, the outer peripheral wall of the sleeve is provided with a mounting protrusion, and the mounting protrusion is arranged close to one of the conductive parts.

[0005] In an embodiment, the fuse further comprises a wiring part connected with the conductive part, and the wiring part is used for external connection of the circuit.

[0006] In an embodiment, the conductive part is annular, the wiring part comprises a wiring segment and a connecting segment connected with each other, the wiring segment is used for external connection of the circuit, and the connecting segment is arc-shaped and attached to the outer wall of the conductive part.

[0007] In an embodiment, the wiring segment and the connecting segment are connected by bending, and the wiring segment extends away from the conductive part.

[0008] In an embodiment, the mounting protrusion is integrally formed with the sleeve.

[0009] In an embodiment, the mounting protrusion is separately arranged from the sleeve, the mounting protrusion is sleeved on the outer periphery of the sleeve, and the mounting protrusion is threadedly connected with the sleeve.

[0010] In an embodiment, the mounting protrusion is annular.

[0011] In an embodiment, the mounting protrusion is provided with a mounting hole penetrating through the axial direction of the sleeve.

[0012] In an embodiment, the conductive part is threadedly connected with the inner peripheral wall of the sleeve.

[0013] In an embodiment, the sleeve is provided with a plurality of heat dissipation holes on the peripheral wall.

[0014] In an embodiment, the sleeve is made of epoxy glass fiber.

[0015] The application also provides a transformer comprising an oil tank and the fuse described above, wherein the fuse is installed in the oil tank through the mounting protrusion.

[0016] In an embodiment, the oil tank comprises a main tank body and a secondary tank body, the main tank body is used for installing a transformer body of the transformer, the secondary tank body is arranged outside the main tank body and is in communication with the main tank body, and the fuse is installed in the secondary tank body.

[0017] In an embodiment, the oil tank further comprises a fixing plate, the fixing plate is connected to an inner wall of the secondary tank body, the sleeve passes through the fixing plate, and the mounting protrusion is abutted to one side of the fixing plate and is connected to the fixing plate.

[0018] In an embodiment, the transformer further comprises a reinforcing member, the reinforcing member comprises a first reinforcing portion and a second reinforcing portion arranged at an angle, the first reinforcing portion is welded to the inner wall of the secondary tank body, and the second reinforcing portion is connected to the fixing plate through a fastener.

[0019] The technical scheme of the application can install the sleeve first by arranging the mounting protrusion on the outer periphery of the sleeve, the sleeve with lighter weight is more convenient and faster to install, thereby improving the convenience of installation, disassembly and replacement of the fuse, reducing the operation and maintenance cost of the transformer, and improving the overall operation efficiency of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0021] Figure 1 The structural schematic diagram of an embodiment of the fuse provided by the application is shown in the figure;

[0022] Figure 2 The Figure 1 exploded view of the fuse is shown in the figure;

[0023] Figure 3 The structural schematic diagram of an embodiment of the transformer provided by the application is shown in the figure;

[0024] Figure 4 is shown in the figure;Figure 3 Side view of the transformer;

[0025] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0026] Explanation of icon numbers:

[0027] 10. Transformer; 100. Fuse; 200. Main enclosure; 300. Sub-enclosure; 400. Fixing plate; 500. Reinforcing member; 510. First reinforcing part; 520. Second reinforcing part; 110. Sleeve; 111. Heat dissipation hole; 120. Mounting protrusion; 121. Mounting hole; 130. Conductive component; 140. Wiring component; 141. Wiring section; 142. Connecting section.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] This application proposes a fuse 100.

[0033] Please see Figures 1 to 3 In one embodiment of this application, the fuse 100 includes a sleeve 110 and two conductive elements 130. The two conductive elements 130 are respectively disposed at both ends of the sleeve 110 in the axial direction. The outer peripheral wall of the sleeve 110 is provided with a mounting protrusion 120, which is disposed close to one of the conductive elements 130.

[0034] Specifically, the sleeve 110 is typically made of insulating material and serves to house the fuse core and provide necessary mechanical support. Two conductive elements 130 are the current input and output terminals of the fuse 100, respectively, located at opposite ends of the sleeve 110's axial direction. Current flows into and out of the fuse 100 through the two conductive elements 130. A mounting protrusion 120 protrudes from the outer peripheral wall of the sleeve 110 and is positioned close to one of the conductive elements 130. The mounting protrusion 120 is used to secure the fuse 100 to other mounting structures, such as the tank of the transformer 10, to ensure its stability and proper electrical connection. The stable mounting of the fuse 100 via the mounting protrusion 120 ensures that the fuse 100 will not move accidentally during operation, thus avoiding potential safety hazards such as short circuits or arcing. Positioning the mounting protrusion 120 close to one of the conductive elements 130 can optimize the overall layout of the fuse 100 to some extent, saving installation space.

[0035] The mounting protrusion 120 can be connected to the mounting structure via welding, screw fastening, flange connection, or snap-fit. The sleeve 110 can be first connected to the mounting structure via the mounting protrusion 120, and then the fuse core can be installed inside the sleeve 110. The sleeve 110 is lightweight, making it easier to operate and install the fuse 100. When replacing or removing the fuse 100, the fuse core can be removed from the sleeve 110 first, and then the sleeve 110 can be removed from the mounting structure. With the fuse core removed, disassembling the sleeve 110 is also easier. Of course, depending on actual production conditions, the fuse core can also be installed inside the sleeve 110 first, and then the sleeve 110 can be installed to the mounting structure via the mounting protrusion 120.

[0036] The technical solution of this application provides an installation protrusion 120 on the outer periphery of the sleeve 110, which allows the sleeve 110 to be installed first. The lighter sleeve 110 is easier and faster to install, thereby improving the convenience of installation, disassembly and replacement of the fuse 100, reducing the operation and maintenance cost of the transformer 10 and improving the overall operating efficiency of the power system.

[0037] In one implementation, please refer to Figure 1 and Figure 2The fuse 100 also includes a connector 140 connected to the conductive element 130, the connector 140 being used for connecting to an external circuit.

[0038] The connector 140 is directly connected to the conductive element 130 and is used to connect the fuse 100 to an external circuit. Through the connector 140, current can flow into and out of the fuse 100, enabling the fuse 100 to establish a stable connection with the external circuit, ensuring that the current can be transmitted safely and efficiently, while also being able to quickly cut off the current to protect the circuit when needed.

[0039] In one implementation, please refer to Figure 1 and Figure 2 The conductive component 130 is ring-shaped, and the wiring component 140 includes a connecting segment 141 and a connecting segment 142 connected to each other. The connecting segment 141 is used for external circuit connection, and the connecting segment 142 is arc-shaped and attached to the outer wall of the conductive component 130.

[0040] The conductive element 130 is ring-shaped. This ring structure not only provides a stable current path but also effectively disperses heat, improving heat dissipation efficiency. The connecting segment 142 is arc-shaped and attached to the outer wall of the ring-shaped conductive element 130, increasing the contact area between the connector 140 and the conductive element 130 and resulting in a tighter fit. This reduces contact resistance and energy loss, and prevents overheating or sparking caused by poor contact, thereby improving the reliability and safety of the electrical connection. The connecting segment 141 is used to establish a connection with an external circuit; the connecting segment 141 can be a screw terminal, a plug, or other form.

[0041] In other embodiments, the conductive element 130 may also be arc-shaped. The connecting segment 142 may also be sheet-shaped or strip-shaped.

[0042] In one implementation, please refer to Figure 1 and Figure 2 The wiring segment 141 and the connecting segment 142 are bent and connected, and the wiring segment 141 extends away from the conductive element 130.

[0043] The bending design between terminal block 141 and connecting block 142 gives the connector 140 a degree of flexibility, allowing it to be adjusted at different installation angles to adapt to various wiring needs. The bending design also reduces stress concentration on terminal block 141, preventing breakage or damage due to mechanical stress and improving the durability of the connector 140. The connecting block 142 is arc-shaped, and the connection between terminal block 141 and connecting block 142 is bent and extends away from the conductive element 130. This reduces contact or interference between terminal block 141 and the conductive element 130, making it easier to connect terminal block 141 to external circuits. Furthermore, because terminal block 141 extends away from the conductive element 130, the wires for external circuits can be led out from the side of fuse 100, facilitating wiring management and organization, and reducing the possibility of wire tangling and mess.

[0044] In other embodiments, the wiring segment 141 may extend along the tangential direction at the point where it connects to the connection segment 142.

[0045] In one embodiment, the mounting protrusion 120 is integrally formed with the sleeve 110.

[0046] The mounting protrusion 120 and sleeve 110 are wound from epoxy fiberglass material, forming a single integrated structure. That is, during manufacturing, the mounting protrusion 120 and sleeve 110 are produced as a single, integral component. The seamless, integrally formed mounting protrusion 120 and sleeve 110 eliminate seams or weak points, allowing the fuse 100 to better withstand external impacts and vibrations, reducing the risk of damage due to mechanical stress. This also reduces the number of parts and assembly steps, lowering production complexity and cost. Furthermore, it reduces quality issues caused by improper assembly or poor adhesion, improving production efficiency and product consistency.

[0047] In one implementation, please refer to Figure 1 and Figure 2 The mounting protrusion 120 and the sleeve 110 are separately provided. The mounting protrusion 120 is sleeved on the outer periphery of the sleeve 110 and is threadedly connected to the sleeve 110.

[0048] The mounting protrusion 120 and the sleeve 110 are machined separately. The mounting protrusion 120, as an independent component, can be fitted onto the outer periphery of the sleeve 110. The mounting protrusion 120 has internal threads that match the external threads on the sleeve 110. By rotating the mounting protrusion 120, it can be securely fixed to the sleeve 110. It can also be easily disassembled and replaced with a simple rotation operation, allowing for quick replacement of the fuse 100 without damaging other components, thus improving work efficiency. The threaded connection design makes the contact surface between the mounting protrusion 120 and the sleeve 110 more uniform, reducing stress concentration and lowering the risk of wear and damage.

[0049] In other embodiments, the mounting protrusion 120 and the sleeve 110 are separate parts and are connected by welding.

[0050] In one implementation, please refer to Figure 1 and Figure 2 The mounting protrusion 120 is ring-shaped.

[0051] The mounting protrusion 120 is designed in an annular shape and fits around the outer periphery of the sleeve 110. The annular design of the mounting protrusion 120 allows it to be evenly distributed around the sleeve 110, providing a larger contact area and better mechanical support. This enables the fuse 100 to better withstand external impacts and vibrations, reducing the risk of damage due to mechanical stress. Simultaneously, when the annular mounting protrusion 120 is connected to the mounting structure, there is a larger contact area between them, making the installation of the fuse 100 more stable.

[0052] In other embodiments, a plurality of mounting protrusions 120 are provided, and the plurality of mounting protrusions 120 are spaced apart along the circumference of the sleeve 110.

[0053] In one implementation, please refer to Figure 1 and Figure 2 The mounting protrusion 120 is provided with a mounting hole 121 that extends through the sleeve 110 along its axial direction.

[0054] The mounting protrusion 120 is provided with a mounting hole 121 that extends through the sleeve 110 along the axial direction. The mounting hole 121 can be used to fix the mounting protrusion 120 to the mounting structure with fasteners such as screws, rivets, and pins, thereby realizing the fixed installation of the sleeve 110 and enhancing the stability of the fuse 100 installation.

[0055] In other embodiments, the mounting protrusion 120 may not have a mounting hole 121. For example, the mounting structure may have a slot in which the mounting protrusion 120 is engaged; or, the mounting protrusion 120 may be welded to the mounting structure; or, the outer peripheral wall of the mounting protrusion 120 may have threads, and the mounting structure may have a threaded structure that matches them.

[0056] In one embodiment, the conductive element 130 is threadedly connected to the inner peripheral wall of the sleeve 110.

[0057] The conductive element 130 is inserted into the sleeve 110, and part of the conductive element 130 protrudes from the end of the sleeve 110 to facilitate connection with the connector 140.

[0058] The threaded connection between the conductive element 130 and the inner circumferential wall of the sleeve 110 allows for easy installation and disassembly of the conductive element 130, facilitating maintenance and replacement. Simultaneously, the threaded connection provides excellent mechanical strength and sealing performance, ensuring long-term reliable use. The threaded connection also allows for some adjustment of the position of the conductive element 130 to adapt to different installation requirements and environmental conditions.

[0059] In other embodiments, the conductive element 130 is interference-fitted with the sleeve 110.

[0060] In one implementation, please refer to Figure 1 and Figure 2 The sleeve 110 has multiple heat dissipation holes 111 on its peripheral sidewall.

[0061] Traditional fuses encapsulate the fuse core within a sealed sleeve 110. However, this installation method restricts heat dissipation within the sleeve 110, leading to a significant temperature rise inside the sleeve 110 during operation. Multiple heat dissipation holes 111 are provided on the peripheral sidewall of the sleeve 110. These holes are equidistantly arrayed along the axial direction of the sleeve 110. The heat dissipation holes 111 improve oil circulation and enhance heat dissipation, ensuring that the heat generated by the fuse 100 during operation can be quickly and effectively dissipated to the external environment, significantly reducing the temperature rise inside the sleeve 110 and improving the breaking capacity and service life of the fuse 100. In high-temperature environments, the fuse 100 requires derating. A 1% increase in temperature rise necessitates a 1% reduction in the rated current of the fuse 100. By addressing the temperature rise issue within the sleeve 110, the fuse 100 can be optimized for selection, better matching the short-circuit curve and thus better protecting the transformer 10.

[0062] In addition, to address the potential lightning strike issue that the fuse 100 may face during the oil-to-air medium transition, the oil in the tank can enter the sleeve 110 through the heat dissipation hole 111, allowing the fuse core to be completely immersed in the oil. This significantly reduces the insulation distance, improves the overall high-voltage withstand capability and lightning strike withstand capability of the fuse 100, and ensures its stable operation under extreme weather conditions.

[0063] The reduction in the insulation distance between the fuse cores shortens the axial length of the sleeve 110, thereby reducing the material used in the sleeve 110. This not only reduces the manufacturing cost of the sleeve 110 but also reduces the installation space of the oil tank, thus achieving the cost reduction target for both the fuse 100 and the transformer 10.

[0064] In one embodiment, the sleeve 110 is made of epoxy glass fiber.

[0065] Sleeve 110 is made of epoxy fiberglass winding. Epoxy fiberglass has extremely high electrical insulation resistance, maintaining stable insulation performance under high voltage conditions, effectively preventing current leakage and ensuring the safe operation of fuse 100; epoxy fiberglass can withstand significant mechanical stress and impact, reducing the risk of damage caused by external vibration or collision; epoxy fiberglass has excellent heat resistance, enabling stable operation for extended periods at high temperatures without deformation or softening; epoxy fiberglass also has a low coefficient of thermal expansion, maintaining dimensional stability in environments with large temperature variations, preventing loosening or failure of connections due to thermal expansion and contraction; epoxy fiberglass is relatively lightweight, facilitating installation and handling, while also being highly durable, capable of withstanding long-term mechanical and environmental loads.

[0066] This application also proposes a transformer 10, which includes an oil tank and a fuse 100. The specific structure of the fuse 100 is as described in the above embodiments. Since the transformer 10 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0067] The fuse 100 is mounted inside the oil tank via a mounting protrusion 120. The oil tank is the main outer casing of the transformer 10, typically made of metal (such as steel plate), and filled with insulating oil to cool the windings and core of the transformer 10 and provide electrical insulation. The oil tank contains mounting brackets or fixing surfaces for connecting to the mounting protrusion 120 to mount the fuse 100 inside the tank.

[0068] In one implementation, please refer to Figure 1 and Figure 2 The oil tank includes a main tank 200 and a secondary tank 300. The main tank 200 is used to install the transformer body of the transformer 10. The secondary tank 300 is located outside the main tank 200 and is connected to the main tank 200. The fuse 100 is installed inside the secondary tank 300.

[0069] The main enclosure 200 is the main outer casing of the transformer 10, filled with insulating oil. The main enclosure 200 houses the transformer body, which includes the core, windings, and other components. The auxiliary enclosure 300 is located outside the main enclosure 200 and communicates with it, allowing the insulating oil in both enclosures to flow freely, which helps dissipate heat from the fuse 100. The excellent thermal conductivity of the oil enables the fuse 100 to maintain a low temperature under high-load operating conditions, extending its service life and further improving the electrical insulation performance and safety of the system.

[0070] The secondary enclosure 300 provides independent installation space for the fuse 100 and other auxiliary equipment, making installation and maintenance more convenient. Technicians can install, inspect, and replace the fuse 100 without opening the main enclosure 200, reducing maintenance time and costs; it also avoids direct exposure of the fuse 100 and other equipment to the high-voltage environment inside the main enclosure 200, reducing electrical safety hazards caused by high voltage; the design of the secondary enclosure 300 also provides additional heat dissipation space for the fuse 100, avoiding heat accumulation problems caused by space limitations, and further optimizing heat dissipation.

[0071] The design of the mounting protrusion 120 allows the sleeve 110 to be connected to the auxiliary oil tank first, and then the fuse core to be installed inside the sleeve 110. When installing the sleeve 110, its lighter weight makes it easier to operate and install the fuse 100, thus allowing the fuse 100 to be easily fixed inside the auxiliary housing 300, improving the installation efficiency of the fuse 100.

[0072] In other embodiments, the fuel tank consists only of the main housing 200, and the fuse 100 is mounted inside the main housing 200 via the mounting protrusion 120.

[0073] In one implementation, please refer to Figure 3 and Figure 4 The fuel tank also includes a fixing plate 400, which is connected to the inner wall of the auxiliary tank body 300. The sleeve 110 passes through the fixing plate 400, and the mounting protrusion 120 abuts against one side of the fixing plate 400 and is connected to the fixing plate 400.

[0074] The fixing plate 400 connects to the inner wall of the sub-box 300 and is used to support and fix the fuse 100. The fixing plate 400 is typically made of high-strength metal, possessing good mechanical strength and corrosion resistance, allowing the fuse 100 to be more securely fixed within the sub-box 300. The fixing plate 400 has holes for the sleeve 110 to pass through, ensuring the fuse 100 is firmly fixed within the sub-box 300. The mounting protrusion 120 abuts against one side of the fixing plate 400 and is connected to the fixing plate 400 by fasteners, enhancing the mechanical stability of the fuse 100, reducing the risk of loosening or falling off due to external vibration or impact, and ensuring a long-term reliable fixing effect.

[0075] In one implementation, please refer to Figure 3 Figure 4 Figure 5 The transformer 10 also includes a reinforcing member 500, which includes a first reinforcing part 510 and a second reinforcing part 520 arranged at an angle. The first reinforcing part 510 is welded to the inner wall of the sub-box 300, and the second reinforcing part 520 is connected to the fixing plate 400 by fasteners.

[0076] The reinforcing member 500 includes a first reinforcing part 510 and a second reinforcing part 520 arranged at an included angle to enhance the connection strength between the fixing plate 400 and the sub-box 300, enabling the fixing plate 400 to better support and fix the fuse 100. The first reinforcing part 510 is welded to the inner wall of the sub-box 300, providing additional mechanical support and enhancing the rigidity and deformation resistance of the sub-box 300. Under external impact or vibration, the sub-box 300 can maintain structural integrity and stability. The second reinforcing part 520 is connected to the fixing plate 400 by fasteners (such as screws, rivets, etc.), further enhancing the stability of the fixing plate 400, ensuring the secure installation of the fuse 100, and reducing the risk of loosening or detachment due to external vibration or impact.

[0077] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A fuse, characterized in that, It includes a sleeve and two conductive components, which are respectively disposed at both ends of the sleeve along the axial direction. The outer peripheral wall of the sleeve is provided with a mounting protrusion, which is disposed close to one of the conductive components.

2. The fuse as described in claim 1, characterized in that, The fuse also includes a connector connected to the conductive element, the connector being used for connecting to an external circuit.

3. The fuse as described in claim 2, characterized in that, The conductive component is ring-shaped, and the wiring component includes a connected wiring segment and a connecting segment. The wiring segment is used for connecting to an external circuit, and the connecting segment is arc-shaped and attached to the outer wall of the conductive component.

4. The fuse as described in claim 3, characterized in that, The wiring segment and the connecting segment are bent and connected, and the wiring segment extends away from the conductive element.

5. The fuse as claimed in claim 1, characterized in that, The mounting protrusion is integrally formed with the sleeve; or the mounting protrusion is separately formed from the sleeve, with the mounting protrusion sleeved on the outer periphery of the sleeve and threadedly connected to the sleeve. And / or, the mounting protrusion is annular; And / or, the mounting protrusion is provided with a mounting hole that extends through the axial direction of the sleeve; And / or, the conductive element is threaded to the inner circumferential wall of the sleeve.

6. The fuse as claimed in claim 1, characterized in that, The sleeve has multiple heat dissipation holes on its peripheral sidewall; And / or, the sleeve is made of epoxy glass fiber.

7. A transformer, characterized in that, It includes a fuel tank and a fuse as described in any one of claims 1 to 6, the fuse being mounted inside the fuel tank via the mounting protrusion.

8. The transformer as described in claim 7, characterized in that, The oil tank includes a main tank and a secondary tank. The main tank is used to install the transformer body of the transformer. The secondary tank is located outside the main tank and is connected to the main tank. The fuse is installed in the secondary tank.

9. The transformer as described in claim 8, characterized in that, The fuel tank also includes a fixing plate, which is connected to the inner wall of the auxiliary tank body. The sleeve passes through the fixing plate, and the mounting protrusion abuts against one side of the fixing plate and is connected to the fixing plate.

10. The transformer as described in claim 9, characterized in that, The transformer also includes a reinforcing member, which includes a first reinforcing part and a second reinforcing part arranged at an angle. The first reinforcing part is welded to the inner wall of the sub-box, and the second reinforcing part is connected to the fixing plate by fasteners.

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