Box cover for large transformer and large transformer

Abstract

The utility model provides a box cover for a large transformer and the large transformer. The box cover (100) for the large transformer comprises a main body (1000), wherein the main body (1000) comprises at least one reinforcer mounting seat (1200) fixed on the top surface of the main body (1000); the at least one reinforcing piece (2000) is used for enhancing the strength of the box cover (100); and the detachable connecting piece is used for detachably connecting the reinforcing piece (2000) to the reinforcing piece mounting seat (1200). According to the utility model, the reinforcer for the box cover of the large transformer can be detached during transportation, so that the transportation height is reduced, and the transportation cost is further reduced.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of transformers, and relates to a cover for a large transformer and a large transformer, and more specifically, to a large transformer having a detachable cover reinforcement member. Background Art

[0002] With the development of industrialization and urbanization, the reliable supply of electricity has become increasingly important. As a new type of power transformation equipment, the box-type substation has received more and more attention due to its flexibility and portability. Existing substations include fixed substations and vehicle-mounted mobile substations. After being transported to the installation site, the fixed substation is usually fixed to a specific working position, and its installation and commissioning are relatively cumbersome, requiring a certain amount of land resources. At the same time, since it cannot be moved quickly, it is not suitable for special needs such as emergency repair and temporary power supply; in contrast, the mobile substation has the advantages of portability and flexibility and has become an ideal choice for emergency power supply and temporary power supply. It can be quickly deployed to places where power supply is needed to provide reliable power support for temporary and temporary electricity use. For example, in special situations such as natural disasters or construction sites, the mobile substation can quickly provide power supply to meet the basic living and production needs.

[0003] In mobile substations, oil-immersed transformers are more commonly used. An oil-immersed transformer is a type of transformer that uses transformer oil for cooling and insulation, and its iron core winding is immersed in the transformer oil. This design can provide good insulation performance and cooling effect, enabling the transformer to operate stably and reliably under high load conditions. The transformer is the heart of the substation, and there are strict regulations for its transportation process.

[0004] The electrical parameters of 500 kV, 750 kV, and 1000 kV transformers determine their huge volume. According to their electrical parameters, generally, the height is between 4 meters and 6 meters, the width is between 3 meters and 4 meters, the length is between 6 meters and 10 meters, and the weight is several hundred tons to over a thousand tons. When transporting large transformers from the manufacturing factory to the target use location by road transportation, it is restricted by the railway bridges along the way. Generally, the passing height under the bridge is 4.2 meters. In road transportation, the height limit for Class I large items is also 4.2 meters. Therefore, if you want to transport a large transformer under the bridge, you can only dig down the road under the bridge, and then restore the original road after the large transformer passes. This greatly increases the transportation cost and extends the transportation cycle.

[0005] The "large transformer" described in this article refers to a transformer whose transportation height after being loaded on a vehicle is greater than or equal to or close to 4.2 meters. Such large transformers will encounter the problem of exceeding the restricted passing height as described above.

[0006] On the cover of an oil-immersed transformer, due to the large length span of the cover, multiple reinforcing ribs are required to increase the strength. Usually, welding is used to fix the reinforcing ribs on the top of the cover, which increases the height of the large transformer and the inconvenience of transportation.

[0007] Therefore, what is expected is a cover that can adjust the height of the cover. Summary of the Utility Model

[0008] In view of this, the present utility model aims to provide a cover for a large transformer, which cover has detachable reinforcing members. By removing the reinforcing ribs from the cover, the overall height of the large transformer can be significantly reduced, and thus the transportation height of the large transformer can also be reduced. The present utility model also aims to provide a large transformer including such a cover.

[0009] According to one aspect of the present utility model, there is provided a cover for a large transformer, which includes: a main body, the main body including at least one reinforcing member mounting seat fixed on the top surface of the main body; at least one reinforcing member for enhancing the strength of the cover; and a detachable connecting member for detachably connecting the reinforcing member to the reinforcing member mounting seat.

[0010] By replacing the connection method of welding the reinforcing member to the top surface of the main body with a detachable connection method, the reinforcing member can be removed from the top surface of the main body during transportation, thereby reducing the transportation height.

[0011] Further, the reinforcing member mounting seat is provided with a plurality of threaded holes, the reinforcing member is provided with a plurality of through holes, and the detachable connecting member is a plurality of bolts; wherein, in the state where the reinforcing member is connected to the reinforcing member mounting seat, the positions of the plurality of threaded holes and the plurality of through holes are aligned with each other, so that the plurality of bolts can pass through the plurality of through holes and be fastened to the plurality of threaded holes to connect the reinforcing member to the main body.

[0012] By replacing the welding connection with a bolt connection, the reinforcing member can be removed from the main body of the cover. Therefore, the height of the cover can be significantly reduced.

[0013] Further, the reinforcing member includes a base plate, a top plate, and a vertical plate connected between the base plate and the top plate, and the plurality of through holes are provided on the base plate.

[0014] By forming the base plate, the top plate and the vertical plate into a shape similar to an "I-beam", the bending strength of the reinforcing member can be significantly improved.

[0015] Further, the base plate and the top plate are arranged parallel to each other, and the vertical plate is orthogonally connected to the center of the base plate and the top plate.

[0016] By orthogonally arranging the vertical plate between the base plate and the top plate, the stress generated by the connection can be symmetrically distributed.

[0017] Further, the plurality of through holes are arranged in rows on both sides of the vertical plate on the base plate.

[0018] By arranging the through holes in rows, the stress between the main body of the box cover and the reinforcing member can be evenly distributed.

[0019] Further, the thickness of the box cover is at least 30 mm, the distance between two adjacent through holes in each row is less than or equal to 200 mm, the threads of the plurality of threaded holes are M32 threads, and the threads of the plurality of bolts are M32 threads.

[0020] By setting the size of the threads and the number of through holes in this way, the box cover with a thickness of at least 30 mm can obtain a welding equivalent strength that matches welding the reinforcing member to the main body of the box cover.

[0021] Optionally, the distance between the bottom surface of the base plate and the top surface of the top plate is greater than or equal to 300 mm.

[0022] By setting the height of the reinforcing member in this way, sufficient reinforcing strength can be provided, and the height of the box cover can be significantly reduced after disassembly.

[0023] Optionally, the vertical plate and the base plate have equal lengths in their maximum extension directions, the length of the top plate in its maximum extension direction is less than the length of the vertical plate in its maximum extension direction, and the portion of the vertical plate not covered by the top plate has a chamfered portion.

[0024] By providing a chamfered portion on the portion of the vertical plate not covered by the top plate, the stress distribution within the vertical plate can be optimized.

[0025] Further, a lifting hole is provided at the portion of the vertical plate not covered by the top plate.

[0026] By arranging the lifting hole at the portion of the vertical plate not covered by the top plate, the lifting tool does not interfere with the top plate of the reinforcing member when lifting the reinforcing member.

[0027] Optionally, the reinforcing member mounting seat is arranged as a plate member, and the plate member is welded to the top surface of the main body.

[0028] By arranging the reinforcing member mounting seat as a plate member and forming the threaded holes as through holes or blind holes on the plate member, the integrity of the main body of the box cover can be maintained, ensuring the sealing performance of the transformer box body.

[0029] According to another aspect of the present invention, a large transformer is provided, which includes any one of the foregoing box covers for a transformer.

[0030] By applying a cover for a large transformer with a detachable reinforcement, the transportation height of the large transformer can be reduced during transportation, thereby reducing the transportation cost and correspondingly shortening the transportation cycle.

[0031] Through the cover for a large transformer of the present utility model, at least the following beneficial technical effects can be achieved.

[0032] First, by replacing welding with detachable connection, the reinforcement of the cover can be detached during transportation, thereby reducing the transportation height, further reducing the transportation cost, and shortening the transportation cycle.

[0033] Second, by arranging through holes on both sides of the reinforcement in rows, the equivalent welding strength for welding the reinforcement to the cover body can be obtained.

[0034] Third, by arranging the lifting holes on the part of the vertical plate not covered by the top plate, the lifting tool can be prevented from interfering with the top plate of the reinforcement when lifting the reinforcement. Description of the Drawings

[0035] Through the following description with reference to the drawings, the features and advantages of one or several embodiments of the present utility model will become more readily understandable. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present utility model in any way. The drawings are not drawn to scale, and some features may be enlarged or reduced to show details of specific components. In the drawings:

[0036] Figure 1 is a perspective schematic view of a cover for a large transformer according to an embodiment of the present disclosure;

[0037] Figure 2 is Figure 1 a partial schematic view of the cover for a large transformer of the shown embodiment, which shows a reinforcement and a reinforcement mounting seat.

[0038] Explanation of the Reference Numerals in the Drawings:

[0039] 100, cover;

[0040] 1000, main body; 1200, reinforcement mounting seat; 1800, threaded hole;

[0041] 2000, reinforcement;

[0042] 2200, base plate; 2400, top plate; 2600, vertical plate;

[0043] 2800, through hole; 2620, lifting hole. Detailed Embodiments

[0044] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present disclosure or its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form.

[0046] Figure 1 is a three-dimensional schematic diagram of a cover for a large transformer according to an embodiment of the present disclosure.

[0047] Figure 2 is Figure 1 a partial schematic diagram of the cover for a large transformer of the illustrated embodiment, which shows a reinforcing member and a reinforcing member mounting seat.

[0048] The "large transformer" described herein refers to a transformer with a transportation height greater than or equal to or close to 4.2 meters after being loaded onto a vehicle. Such a large transformer will encounter the problem that its height exceeds the restricted passing height during transportation.

[0049] Please refer to Figure 1 , which shows a cover 100 for a large transformer. The cover 100 includes a main body 1000, at least one reinforcing member 2000, and a detachable connecting member. The main body 1000 includes at least one reinforcing member mounting seat 1200 fixed on the top surface of the main body 1000. The detachable connecting member is used to detachably connect the reinforcing member 2000 to the reinforcing member mounting seat 1200.

[0050] Each reinforcing member mounting seat 1200 is provided with a plurality of threaded holes 1800, and each reinforcing member 2000 can be detachably connected to the reinforcing member mounting seat 1200 and is provided with a plurality of through holes 2800. It is also possible to have only one reinforcing member 2000. The detachable connecting member can be a plurality of bolts.

[0051] The number of reinforcing members can be two, three, four or more. Four reinforcing members are shown in Figure 1 .

[0052] In a state where the reinforcement member 2000 is connected to the reinforcement member mounting seat 1200, the positions of the plurality of threaded holes 1800 and the plurality of through holes 2800 are aligned with each other, so that a plurality of bolts can pass through the plurality of through holes 2800 and be fastened to the plurality of threaded holes 1800 to connect the reinforcement member 2000 to the main body 1000.

[0053] By replacing the welded connection with a bolt connection, the reinforcement member can be removed from the main body of the lid, and thus, the height of the lid can be significantly reduced.

[0054] According to an embodiment of the present application, the reinforcement member 2000 includes a base plate 2200, a top plate 2400, and a vertical plate 2600 connected between the base plate 2200 and the top plate 2400, and a plurality of through holes 2800 are provided on the base plate 2200.

[0055] By forming the base plate, the top plate, and the vertical plate into a shape similar to an "I-beam", as Figure 2 shown, the bending strength of the reinforcement member can be significantly improved.

[0056] According to an embodiment of the present application, the base plate 2200 and the top plate 2400 are arranged parallel to each other, and the vertical plate 2600 is orthogonally connected to the centers of the base plate 2200 and the top plate 2400.

[0057] By arranging the vertical plate orthogonally between the base plate and the top plate, the stress generated by the connection can be symmetrically distributed with respect to the top plate.

[0058] According to an embodiment of the present application, a plurality of through holes 2800 are arranged in rows on both sides of the vertical plate 2600 on the base plate 2200. In the Figure 2 embodiment shown, each row has 30 through holes. Those of ordinary skill in the art can conceive of using more or fewer through holes.

[0059] By arranging the through holes in rows, the stress between the main body of the lid and the reinforcement member can be evenly distributed.

[0060] According to an embodiment of the present application, the thickness of the lid is at least 30 mm, and the distance between two adjacent through holes 2800 in each row is less than or equal to 200 mm. According to an embodiment of the present application, the threads of the plurality of threaded holes 1800 are M32 threads, and the threads of the plurality of bolts are M32 threads.

[0061] By setting the size of the threads and the number of through holes in this way, the lid with a thickness of at least 30 mm can obtain a welding equivalent strength that matches welding the reinforcement member to the main body of the lid. Those of ordinary skill in the art can also consider other alternative solutions.

[0062] According to an embodiment of the present application, the distance between the bottom surface of the substrate 2200 and the top surface of the top plate 2400 is greater than or equal to 300 mm.

[0063] By setting the height of the reinforcing member in this way, sufficient reinforcing strength can be provided, and the height of the lid can be significantly reduced after disassembly.

[0064] According to an embodiment of the present application, the length of the vertical plate 2600 in its maximum extension direction is equal to that of the substrate 2200, the length of the top plate 2400 in its maximum extension direction is less than the length of the vertical plate 2600 in its maximum extension direction, and the portion of the vertical plate 2600 not covered by the top plate 2400 has a chamfered portion.

[0065] By providing a chamfered portion on the portion of the vertical plate not covered by the top plate, the stress distribution within the vertical plate can be optimized.

[0066] According to an embodiment of the present application, a lifting hole 2620 is provided at the portion of the vertical plate 2600 not covered by the top plate 2400.

[0067] By providing the lifting hole at the portion of the vertical plate not covered by the top plate, interference between the lifting tool and the top plate of the reinforcing member can be avoided when lifting the reinforcing member.

[0068] According to an embodiment of the present application, the reinforcing member mounting seat 1200 is provided as a plate member, and the plate member is welded to the top surface of the main body 1000.

[0069] By providing the reinforcing member mounting seat as a plate member and forming the threaded hole as a through hole or a blind hole in the plate member, the integrity of the main body of the lid can be maintained, ensuring the sealing performance of the transformer box body.

[0070] According to another aspect of the present utility model, a large transformer is provided, and the large transformer includes any one of the foregoing.

[0071] By applying a lid with a detachable reinforcing member, the transportation height of the large transformer can be reduced during transportation, thereby reducing the transportation cost and correspondingly shortening the transportation cycle.

[0072] The advantages of the lid for a large transformer and the large transformer of the present disclosure are as follows:

[0073] First, by replacing welding with detachable connection, the reinforcing member of the lid can be disassembled during transportation, thereby reducing the transportation height, further reducing the transportation cost, and shortening the transportation cycle.

[0074] Second, by arranging through holes on both sides of the reinforcing member in a row, welding equivalent strength for welding the reinforcing member to the lid main body can be obtained.

[0075] Thirdly, by arranging the lifting holes in the part of the vertical plate that is not covered by the top plate, it is possible to prevent the lifting tool from interfering with the top plate of the reinforcement when lifting the reinforcement.

[0076] The various embodiments and variations of the present invention have been specifically described above. However, those skilled in the art should understand that the present invention is not limited to the above specific embodiments and variations, but may include other various possible combinations and associations. Other variations and modifications can be implemented by those skilled in the art without departing from the essence and scope of the present invention. All such variations and modifications fall within the scope of the present invention. Moreover, all the components described herein can be replaced by other technically equivalent components.

Claims

1. A cover (100) for a large transformer, characterized in that, Comprising: A main body (1000), the main body (1000) including at least one reinforcing member mounting seat (1200) fixed on the top surface of the main body (1000); At least one reinforcing member (2000) for enhancing the strength of the tank cover (100); and A detachable connecting member for detachably connecting the reinforcing member (2000) to the reinforcing member mounting seat (1200).

2. The cover (100) for a large transformer according to claim 1, characterized in that, The reinforcing member mounting seat (1200) is provided with a plurality of threaded holes (1800), the reinforcing member (2000) is provided with a plurality of through holes (2800), and the detachable connecting members are a plurality of bolts; wherein, in a state where the reinforcing member (2000) is connected to the reinforcing member mounting seat (1200), positions of the plurality of threaded holes (1800) and the plurality of through holes (2800) are aligned with each other, so that the plurality of bolts can pass through the plurality of through holes (2800) and be fastened to the plurality of threaded holes (1800) to connect the reinforcing member (2000) to the main body (1000).

3. The cover (100) for a large transformer according to claim 2, characterized in that, The reinforcing member (2000) includes a base plate (2200), a top plate (2400), and a vertical plate (2600) connected between the base plate (2200) and the top plate (2400), and the plurality of through holes (2800) are provided on the base plate (2200).

4. The cover (100) for a large transformer according to claim 3, characterized in that, The base plate (2200) and the top plate (2400) are arranged parallel to each other, and the vertical plate (2600) is orthogonally connected to the centers of the base plate (2200) and the top plate (2400).

5. The cover (100) for a large transformer according to claim 4, characterized in that, The plurality of through holes (2800) are arranged in rows on both sides of the vertical plate (2600) on the base plate (2200).

6. The cover (100) for a large transformer according to claim 5, characterized in that, The thickness of the tank cover (100) is at least 30 mm, the distance between two adjacent through holes (2800) in each row is less than or equal to 200 mm, the threads of the plurality of threaded holes (1800) are M32 threads, and the threads of the plurality of bolts are M32 threads.

7. The cover (100) for a large transformer according to claim 4, characterized in that, The distance between the bottom surface of the base plate (2200) and the top surface of the top plate (2400) is greater than or equal to 300 mm.

8. The cover (100) for a large transformer according to claim 4, characterized in that, The vertical plate (2600) and the base plate (2200) have equal lengths in their maximum extension directions, the length of the top plate (2400) in its maximum extension direction is less than the length of the vertical plate (2600) in its maximum extension direction, and a chamfered portion is provided on a part of the vertical plate (2600) not covered by the top plate (2400).

9. The cover (100) for a large transformer according to claim 8, characterized in that, A lifting hole (2620) is provided at a part of the vertical plate (2600) not covered by the top plate (2400).

10. The cover (100) for a large transformer according to claim 1, characterized in that, The reinforcing member mounting seat (1200) is arranged as a plate member, and the plate member is welded to the top surface of the main body (1000).

11. A large transformer, characterized in that, Including the tank cover (100) for a large transformer according to any one of claims 1 to 10.

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