Explosion-proof optimization structure of a transformer oil tank rim structure

Abstract

The present application relates to a kind of explosion-proof optimization structure of transformer oil tank rim structure, including tank rim, oil tank top cover and reinforcing rib;Tank rim includes horizontal part and vertical part, the top end of vertical part is connected with the bottom surface of horizontal part, horizontal part and vertical part are integrally formed, the end of vertical part away from horizontal part is connected with the tank side wall of transformer oil tank using butt welding, oil tank top cover is inserted in horizontal part, oil tank top cover is connected with horizontal part using butt welding, reinforcing rib is arranged at the welding position of oil tank top cover and horizontal part, one end of reinforcing rib is connected with the top surface of oil tank top cover using butt welding, the other end of reinforcing rib is connected with tank rim using butt welding;So set, reduce the number of weld simultaneously shift weld position to improve the stress state of weld, supplemented by reinforcing rib at weld, can greatly improve the explosion-proof performance of transformer oil tank rim structure, improve the arc fault defense capability of transformer oil tank.

Description

Technical Field

[0001] This invention relates to the field of transformer oil tank technology, and in particular to an explosion-proof optimized structure for the tank edge of a transformer oil tank. Background Technology

[0002] Currently, oil-immersed power transformers inevitably experience arcing faults. High-energy arcing faults can lead to structural damage to the equipment and uncontrolled leakage of the insulating oil inside. This oil can then cause a combustion and explosion accident upon contact with air. The leaked oil-gas mixture can further endanger surrounding equipment, personnel, and the environment, causing significant losses and adverse effects.

[0003] like Figure 1 As shown, the existing transformer tank edge structure is a horizontal tank edge welded to the vertical sidewall by a T-shaped weld. During a fault, the weld at this point is subjected to bending and shear loads. Under this stress state, the weld has weak impact resistance, which leads to the damage of the transformer tank edge structure in many arc fault accidents, especially the tearing of the weld at the tank edge. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an explosion-proof optimized structure for the transformer tank edge structure. Its advantages include reducing the number of welds and shifting the weld positions to improve the stress state of the welds, thereby enhancing the explosion-proof performance and arc fault prevention capability of the transformer tank edge structure.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution: an explosion-proof optimized structure for the tank edge of a transformer oil tank, comprising a tank edge, a tank top cover, and reinforcing ribs; the tank edge includes a horizontal portion and a vertical portion, the top end of the vertical portion is connected to the bottom surface of the horizontal portion, the horizontal portion and the vertical portion are integrally formed, one end of the vertical portion away from the horizontal portion is butt-welded to the side wall of the transformer oil tank, the tank top cover is inserted into the horizontal portion, the tank top cover is butt-welded to the horizontal portion, and the reinforcing rib is provided at the welding position between the tank top cover and the horizontal portion, one end of the reinforcing rib is butt-welded to the top surface of the tank top cover, and the other end of the reinforcing rib is butt-welded to the tank edge.

[0006] Preferably, in the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention, a recessed platform is provided on the top surface of the horizontal part, the recessed platform is adapted to the tank top cover, the tank top cover is placed inside the recessed platform, and the side wall of the tank top cover is butt-welded to the stepped surface of the recessed platform.

[0007] Preferably, in the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention, the bottom surface of the recessed platform is provided with a sealing groove for installing a sealing element.

[0008] Preferably, the explosion-proof optimized structure of the transformer tank edge provided by the present invention is made of structural steel with a corner structure.

[0009] Preferably, in the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention, the reinforcing rib adopts a C-shaped sheet structure, one end of the reinforcing rib is butt-welded to the top surface of the tank top cover, and the other end of the reinforcing rib is butt-welded to the top surface of the horizontal part.

[0010] Preferably, the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention further includes a reinforcing unit, the two ends of which are respectively welded to two faces orthogonal to the vertical part and the horizontal part.

[0011] Preferably, the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention includes a reinforcing unit comprising a vertical reinforcing plate and a horizontal reinforcing plate. One end of the horizontal reinforcing plate is butt-welded to the side of the vertical part, the bottom end of the vertical reinforcing plate is butt-welded to the top surface of the horizontal reinforcing plate, and the top end of the vertical reinforcing plate is butt-welded to the bottom surface of the horizontal part.

[0012] Preferably, the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention includes a rectangular plate as the reinforcing rib. One side of the rectangular plate has an inwardly recessed groove. The inner top wall of the groove has a first clearance opening and a second clearance opening. The first clearance opening corresponds to the welding position of the tank top cover and the horizontal part. The second clearance opening is located at the inner corner of the groove and corresponds to the top corner of the horizontal part. One end of the tank top cover and one end of the horizontal part are both inserted into the groove. The side wall of the horizontal part abuts against the inner side wall of the groove. The side wall of the rectangular plate abuts against the side of the vertical part. The top surface of the tank top cover and the top surface of the horizontal part are both butt-welded to the inner top wall of the groove. The side wall of the rectangular plate is butt-welded to the side of the vertical part.

[0013] Preferably, the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention further includes a vertical plate, which is disposed in the groove. The top end of the vertical plate is welded to the bottom surface of the horizontal part, and the bottom end of the vertical plate is welded to the inner bottom surface of the groove.

[0014] Preferably, the explosion-proof optimized structure of the transformer tank edge structure provided by the present invention further includes multiple bolts, one end of which passes through the top cover of the tank and is threadedly connected to the horizontal part, and the bolts and the reinforcing ribs are alternately arranged.

[0015] In summary, the beneficial technical effects of this invention are as follows: The explosion-proof optimized structure of the transformer tank edge structure provided in this application includes a tank edge, a tank top cover, and reinforcing ribs; the tank edge includes a horizontal part and a vertical part, the top of the vertical part is connected to the bottom surface of the horizontal part, the horizontal part and the vertical part are integrally formed, one end of the vertical part away from the horizontal part is butt-welded to the side wall of the transformer tank, the tank top cover is inserted into the horizontal part, the tank top cover is butt-welded to the horizontal part, and a reinforcing rib is provided at the welding position of the tank top cover and the horizontal part, one end of the reinforcing rib is butt-welded to the top surface of the tank top cover, and the other end of the reinforcing rib is butt-welded to the tank edge; this arrangement reduces the number of welds and shifts the weld position to improve the stress state of the welds, and with the reinforcement ribs at the welds, the explosion-proof performance of the transformer tank edge structure can be greatly improved, and the arc fault defense capability of the transformer tank can be enhanced. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the edge of an existing transformer tank.

[0017] Figure 2 This is a cross-sectional view of the transformer tank edge in the explosion-proof optimized structure of the transformer tank edge structure provided in the first embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the segmented processing and connection of the tank edge in the explosion-proof optimized structure of the transformer tank edge structure provided in the first embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional view of the transformer tank edge in the explosion-proof optimized structure of the transformer tank edge structure provided in the second embodiment of the present invention.

[0020] Figure 5 This is a cross-sectional view of the transformer tank edge in the explosion-proof optimized structure of the transformer tank edge structure provided in the third embodiment of the present invention.

[0021] Figure 6 This is a top view of the transformer tank edge in the explosion-proof optimized structure of the transformer tank edge structure provided in the third embodiment of the present invention.

[0022] In the diagram, 1. Tank edge; 11. Horizontal section; 111. Seal; 12. Vertical section; 2. Tank top cover; 3. Reinforcing rib; 31. Rectangular plate; 311. Groove; 312. First clearance opening; 313. Second clearance opening; 4. Reinforcing unit; 41. Vertical reinforcing plate; 42. Horizontal reinforcing plate; 5. Tank side wall; 6. Bolt; 7. Vertical plate. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] First embodiment: Reference Figure 2 The first embodiment of this invention discloses an explosion-proof optimized structure for the transformer tank edge, including a tank edge 1, a tank top cover 2, and reinforcing ribs 3. The tank edge 1 includes a horizontal part 11 and a vertical part 12. The top of the vertical part 12 is connected to the bottom surface of the horizontal part 11. The horizontal part 11 and the vertical part 12 are integrally formed. One end of the vertical part 12 away from the horizontal part 11 is butt-welded to the side wall 5 of the transformer tank. The tank top cover 2 is inserted into the horizontal part 11 and is butt-welded to the horizontal part 11. A reinforcing rib 3 is provided at the welding position between the tank top cover 2 and the horizontal part 11. One end of the reinforcing rib 3 is butt-welded to the top surface of the tank top cover 2, and the other end of the reinforcing rib 3 is butt-welded to the tank edge 1. This arrangement reduces the number of welds and shifts the weld position to improve the stress state of the welds. With the addition of the reinforcing rib 3 at the welds, the explosion-proof performance of the transformer tank edge 1 structure can be significantly improved, and the arc fault defense capability of the transformer tank can be enhanced.

[0025] Specifically, the end of the vertical part 12 that is away from the horizontal part 11 is welded to the side wall 5 of the transformer tank using a variable thickness planar welding method.

[0026] The tank edge 1 is made of structural steel with corner structures, such as I-beams, T-beams, H-beams, and L-beams. The transformer tank edge 1 structure can be manufactured by bending and forming this structural steel, so that the horizontal part 11 and the vertical part 12 are integrated components. This design avoids T-shaped welds, and the explosion resistance of the complete structure is much higher than that of the split-welded structure, thereby improving the explosion resistance of the transformer tank edge 1 structure.

[0027] like Figure 3 As shown, the transformer tank edge structure can be integrally bent and formed, thus only one weld seam closes the edge 1. Alternatively, the transformer tank edge 1 structure can be decomposed into... Figure 3 The shown section has several small segments, with the bends and corners processed separately, while the straight sections are still made of structural steel. The various small segments are connected by butt welding to form a closed structure.

[0028] Continue to refer to Figure 2 In this embodiment, a recessed platform is provided on the top surface of the horizontal part 11. The recessed platform is adapted to the oil tank top cover 2. The oil tank top cover 2 is placed inside the recessed platform. The side wall of the oil tank top cover 2 is connected to the stepped surface of the recessed platform by butt welding. This arrangement improves the welding strength between the oil tank top cover 2 and the horizontal part 11.

[0029] Specifically, the side wall of the fuel tank top cover 2 and the stepped surface of the platform are welded together by flat butt welding, and a reinforcing rib 3 is provided at the weld between the fuel tank top cover 2 and the horizontal part 11 to improve the connection strength between the fuel tank top cover 2 and the horizontal part 11.

[0030] Furthermore, in this embodiment, the reinforcing rib 3 adopts a C-shaped sheet structure. One end of the reinforcing rib 3 is butt-welded to the top surface of the fuel tank top cover 2, and the other end of the reinforcing rib 3 is butt-welded to the top surface of the horizontal part 11. By setting the C-shaped reinforcing rib 3, the connection strength and local deformation resistance between the fuel tank top cover 2 and the horizontal part 11 are improved.

[0031] The explosion-proof optimized structure of the transformer tank edge structure provided in this embodiment also includes a reinforcing unit 4. The two ends of the reinforcing unit 4 are respectively welded to the two faces of the vertical part 12 and the horizontal part 11 that are orthogonal to each other. By setting the reinforcing unit 4, the bending and overturning deformation of the horizontal part 11-vertical part 12 of the tank edge 1 can be prevented.

[0032] Specifically, one end of the reinforcing unit 4 is butt-welded to the side wall of the vertical part 12, and the other end of the reinforcing unit 4 is butt-welded to the bottom surface of the horizontal part 11.

[0033] Furthermore, in this embodiment, the reinforcing unit 4 includes a vertical reinforcing plate 41 and a horizontal reinforcing plate 42. One end of the horizontal reinforcing plate 42 is butt-welded to the side of the vertical part 12, the bottom end of the vertical reinforcing plate 41 is butt-welded to the top surface of the horizontal reinforcing plate 42, and the top end of the vertical reinforcing plate 41 is butt-welded to the bottom surface of the horizontal part 11.

[0034] Specifically, the extension direction of the vertical reinforcing plate 41 is parallel to the extension direction of the vertical part 12, and the extension direction of the horizontal reinforcing plate 42 is parallel to the extension direction of the horizontal part 11.

[0035] Furthermore, in this embodiment, a sealing groove 311 for installing the sealing element 111 is provided on the bottom surface of the recessed platform.

[0036] Specifically, a sealing element 111 is inserted into the sealing groove 311, and the sealing element 111 is a metal sealing element 111.

[0037] Second embodiment: Continue to refer to Figure 4The second embodiment of the present invention provides an explosion-proof optimized structure for the transformer tank edge structure. This system can also be applied to the explosion-proof optimized structure for the transformer tank edge structure provided in the first embodiment above. The difference between this system and the explosion-proof optimized structure for the transformer tank edge structure provided in the above embodiment is that: the reinforcing rib 3 includes a rectangular plate 31, one side of which has an inwardly recessed groove 311. The inner top wall of the groove 311 has a first clearance opening 312 and a second clearance opening 313. The first clearance opening 312 and the tank top cover 2 are connected to the water... The welding position of the flat part 11 is correspondingly set, the second clearance opening 313 is located at the inner corner of the groove 311, and the second clearance opening 313 is correspondingly set with the top corner of the horizontal part 11; one end of the fuel tank top cover 2 and one end of the horizontal part 11 are both inserted into the groove 311, the side wall of the horizontal part 11 abuts against the inner side wall of the groove 311, the side wall of the rectangular plate 31 abuts against the side of the vertical part 12, the top surface of the fuel tank top cover 2 and the top surface of the horizontal part 11 are both butt welded to the inner top wall of the groove 311, and the side wall of the rectangular plate 31 is butt welded to the side of the vertical part 12.

[0038] Specifically, the rectangular plate 31 with the inwardly recessed groove 311 is C-shaped. The first clearance opening 312 and the second clearance opening 313 are both arc-shaped.

[0039] The explosion-proof optimized design of the transformer tank structure 1 provided in this embodiment also includes a vertical plate 7, which is set in the groove 311. The top of the vertical plate 7 is welded to the bottom of the horizontal part 11, and the bottom of the vertical plate 7 is welded to the inner bottom of the groove 311.

[0040] Specifically, the extension direction of the upright plate 7 is parallel to the extension direction of the vertical part 12.

[0041] Third embodiment: Continue to refer to Figure 5 and Figure 6 The third embodiment of the present invention provides an explosion-proof optimized structure for the transformer tank edge structure. This system can also be applied to the explosion-proof optimized structure for the transformer tank edge structure provided in the second embodiment above. The difference between this system and the explosion-proof optimized structure for the transformer tank edge structure provided in the above embodiment is that the explosion-proof optimized structure for the transformer tank edge structure provided in this embodiment further includes multiple bolts 6. One end of the bolt 6 passes through the tank top cover 2 and is threadedly connected to the horizontal part 11. The bolts 6 and the reinforcing ribs 3 are alternately arranged. This arrangement further improves the connection strength between the tank top cover 2 and the horizontal part 11.

[0042] The explosion-proof optimized structure of the transformer tank edge structure provided in this application includes a tank edge 1, a tank top cover 2, and reinforcing ribs 3. The tank edge 1 includes a horizontal part 11 and a vertical part 12. The top of the vertical part 12 is connected to the bottom surface of the horizontal part 11. The horizontal part 11 and the vertical part 12 are integrally formed. The end of the vertical part 12 away from the horizontal part 11 is butt-welded to the side wall 5 of the transformer tank. The tank top cover 2 is inserted into the horizontal part 11. The tank top cover 2 is butt-welded to the horizontal part 11. A reinforcing rib 3 is provided at the welding position between the tank top cover 2 and the horizontal part 11. One end of the reinforcing rib 3 is butt-welded to the top surface of the tank top cover 2, and the other end of the reinforcing rib 3 is butt-welded to the tank edge 1. This arrangement reduces the number of welds and shifts the weld position to improve the stress state of the welds. With the addition of the reinforcing rib 3 at the welds, the explosion-proof performance of the transformer tank edge 1 structure can be greatly improved, and the arc fault defense capability of the transformer tank can be enhanced.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An explosion-proof optimized structure for the tank lining of a transformer oil tank, characterized in that: This includes the tank rim, the top cover of the fuel tank, and reinforcing ribs; The tank edge includes a horizontal part and a vertical part. The top of the vertical part is connected to the bottom surface of the horizontal part. The horizontal part and the vertical part are integrally formed. The end of the vertical part away from the horizontal part is butt-welded to the side wall of the transformer tank. The tank top cover is inserted into the horizontal part. The tank top cover is butt-welded to the horizontal part. A reinforcing rib is provided at the welding position between the tank top cover and the horizontal part. One end of the reinforcing rib is butt-welded to the top surface of the tank top cover, and the other end of the reinforcing rib is butt-welded to the tank edge. A recessed platform is provided on the top surface of the horizontal section. The recessed platform is adapted to the top cover of the oil tank. The top cover of the oil tank is placed inside the recessed platform. The side wall of the top cover of the oil tank is butt-welded to the stepped surface of the recessed platform.

2. The explosion-proof optimized structure of the transformer tank edge structure according to claim 1, characterized in that: The bottom surface of the sink is provided with a sealing groove for installing a sealing element.

3. The explosion-proof optimized structure of the transformer tank edge structure according to claim 1, characterized in that: The box edge is made of structural steel with a corner structure.

4. The explosion-proof optimized structure of the transformer tank edge structure according to claim 1, characterized in that: The reinforcing rib adopts a C-shaped sheet structure. One end of the reinforcing rib is butt-welded to the top surface of the fuel tank cover, and the other end of the reinforcing rib is butt-welded to the top surface of the horizontal part.

5. The explosion-proof optimized structure of the transformer tank edge structure according to claim 4, characterized in that: It also includes a reinforcing unit, the two ends of which are welded to two faces orthogonal to the vertical part and the horizontal part, respectively.

6. The explosion-proof optimized structure of the transformer tank edge structure according to claim 5, characterized in that: The reinforcing unit includes a vertical reinforcing plate and a horizontal reinforcing plate. One end of the horizontal reinforcing plate is butt-welded to the side of the vertical part, the bottom end of the vertical reinforcing plate is butt-welded to the top surface of the horizontal reinforcing plate, and the top end of the vertical reinforcing plate is butt-welded to the bottom surface of the horizontal part.

7. The explosion-proof optimized structure of the transformer tank edge structure according to claim 1, characterized in that: The reinforcing rib includes a rectangular plate, one side of which has an inwardly recessed groove. The inner top wall of the groove has a first clearance opening and a second clearance opening. The first clearance opening is corresponding to the welding position of the fuel tank top cover and the horizontal part. The second clearance opening is located at the inner corner of the groove and is corresponding to the top corner of the horizontal part. One end of the fuel tank top cover and one end of the horizontal part are both inserted into the groove. The side wall of the horizontal part abuts against the inner side wall of the groove. The side wall of the rectangular plate abuts against the side of the vertical part. The top surface of the fuel tank top cover and the top surface of the horizontal part are both butt-welded to the inner top wall of the groove. The side wall of the rectangular plate is butt-welded to the side of the vertical part.

8. The explosion-proof optimized structure of the transformer tank edge structure according to claim 7, characterized in that: It also includes a vertical plate, which is disposed in the groove. The top end of the vertical plate is welded to the bottom surface of the horizontal part, and the bottom end of the vertical plate is welded to the inner bottom surface of the groove.

9. The explosion-proof optimized structure of the transformer tank edge structure according to claim 8, characterized in that: It also includes multiple bolts, one end of which passes through the top cover of the oil tank and is threaded to the horizontal part, and the bolts and the reinforcing ribs are alternately arranged.

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