Explosion-proof optimization design of transformer oil tank edge structure

Abstract

The invention relates to an explosion-proof optimization design of a transformer oil tank edge structure. The explosion-proof optimization design comprises a tank edge, an oil tank top cover and reinforcing ribs, the tank edge comprises a horizontal part and a vertical part, the top end of the vertical part is connected with the bottom face of the horizontal part, the horizontal part and the vertical part are integrally formed, the end, away from the horizontal part, of the vertical part is connected with the side wall of the transformer oil tank in a butt welding mode, and the oil tank top cover is inserted into the horizontal part and connected with the horizontal part in a butt welding mode. A reinforcing rib is arranged at the welding position of the fuel tank top cover and the horizontal part, one end of the reinforcing rib is connected with the top face of the fuel tank top cover in a butt welding mode, and the other end of the reinforcing rib is connected with the tank edge in a butt welding mode. By means of the arrangement, the number of welding seams is reduced, meanwhile, the welding seam positions are transferred to improve the stress state of the welding seams, the reinforcing ribs at the welding seams are used in an auxiliary mode, the anti-explosion performance of the transformer oil tank edge structure can be greatly improved, and the arc fault defense capacity of a transformer oil tank is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer oil tanks, and in particular to an explosion-proof optimization design of a transformer oil tank edge structure. Background Art

[0002] At present, arc faults are inevitable in oil-immersed power transformers. High-energy arc faults will cause damage to the equipment structure and uncontrolled release of the insulating oil inside, which may cause combustion and explosion accidents after contact with air. The leaked oil-gas mixture may further endanger the surrounding equipment, personnel and environment of the equipment, causing great losses and adverse effects.

[0003] like Figure 1 As shown, the existing transformer oil tank edge structure is a horizontal edge welded to the vertical side wall by a T-shaped weld. In the event of a fault, the weld is subjected to bending and shear loads. Under this stress state, the weld has weak impact resistance, resulting in multiple arc fault accidents in which the transformer oil tank edge structure is damaged, especially the weld tearing at the edge. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an explosion-proof optimization design for the edge structure of a transformer oil tank, which has the advantage of being able to reduce the number of welds and simultaneously shift the weld positions to improve the stress state of the welds, thereby improving the explosion-proof performance and arc fault defense capability of the transformer oil tank edge structure.

[0005] The above-mentioned inventive object of the present invention is achieved through the following technical solutions: an explosion-proof optimized design of a transformer oil tank edge structure, comprising a tank edge, a tank top cover and reinforcing ribs; the tank edge comprises 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 tank 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, the reinforcing ribs are arranged at the welding position of the tank top cover and the horizontal portion, one end of the reinforcing ribs is butt-welded to the top surface of the tank top cover, and the other end of the reinforcing ribs is butt-welded to the tank edge.

[0006] Preferably, in the explosion-proof optimized design of the transformer oil tank rim structure provided by the present invention, a sinker is provided on the top surface of the horizontal portion, the sinker is matched with the oil tank top cover, the oil tank top cover is placed in the sinker, and the side wall of the oil tank top cover is butt-welded to the step surface of the sinker.

[0007] Preferably, in the explosion-proof optimized design of the transformer oil tank rim structure provided by the present invention, a sealing groove for installing a sealing member is provided on the bottom surface of the sink.

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

[0009] Preferably, for the explosion-proof optimization design of the tank rim structure of the transformer provided by the present invention, the reinforcing rib is in the shape of a C-shaped sheet. One end of the reinforcing rib is connected to the top surface of the tank top cover by butt welding, and the other end of the reinforcing rib is connected to the top surface of the horizontal part by butt welding.

[0010] Preferably, for the explosion-proof optimization design of the tank rim structure of the transformer provided by the present invention, it further includes a strengthening unit. Both ends of the strengthening unit are respectively connected to two faces where the vertical part and the horizontal part are orthogonal by butt welding.

[0011] Preferably, for the explosion-proof optimization design of the tank rim structure of the transformer provided by the present invention, the strengthening unit includes a vertical strengthening plate and a horizontal strengthening plate. One end of the horizontal strengthening plate is connected to the side surface of the vertical part by butt welding. The bottom end of the vertical strengthening plate is connected to the top surface of the horizontal strengthening plate by butt welding, and the top end of the vertical strengthening plate is connected to the bottom surface of the horizontal part by butt welding.

[0012] Preferably, for the explosion-proof optimization design of the tank rim structure of the transformer provided by the present invention, the reinforcing rib includes a rectangular plate. A groove is recessed inwardly on one side of the rectangular plate. A first avoidance opening and a second avoidance opening are provided on the inner top wall of the groove. The first avoidance opening is correspondingly arranged at the welding position of the tank top cover and the horizontal part. The second avoidance opening is located at the inner corner of the groove, and the second avoidance opening is correspondingly arranged with 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 surface of the vertical part. The top surface of the tank top cover and the top surface of the horizontal part are both connected to the inner top wall of the groove by butt welding. The side wall of the rectangular plate is connected to the side surface of the vertical part by butt welding.

[0013] Preferably, for the explosion-proof optimization design of the tank rim structure of the transformer provided by the present invention, it further includes a vertical plate. The vertical plate is arranged in the groove. The top end of the vertical plate is connected to the bottom surface of the horizontal part by butt welding. The bottom end of the vertical plate is connected to the inner bottom surface of the groove by butt welding.

[0014] Preferably, for the explosion-proof optimization design of the tank rim structure of the transformer provided by the present invention, it further includes a plurality of bolts. One end of the bolt passes through the tank top cover and is threadedly connected to the horizontal part. The bolts and the reinforcing ribs are arranged alternately.

[0015] In summary, the beneficial technical effects of the present invention are as follows: the explosion-proof optimized design of the transformer oil tank edge structure provided in the present application includes 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, and the 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 and the horizontal portion are butt-welded, and reinforcing ribs are arranged at the welding position of 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; such an arrangement reduces the number of welds and shifts the weld position to improve the stress state of the weld, and with the assistance of the reinforcing ribs at the weld, the explosion-proof performance of the transformer oil tank edge structure can be greatly improved, and the arc fault defense capability of the transformer oil tank can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a cross-sectional structural diagram of a transformer oil tank edge in the explosion-proof optimization design of the transformer oil tank edge structure provided by the first embodiment of the present invention.

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

[0019] Figure 4 It is a cross-sectional structural diagram of a transformer oil tank edge in the explosion-proof optimization design of the transformer oil tank edge structure provided in the second embodiment of the present invention.

[0020] Figure 5 It is a cross-sectional structural diagram of a transformer oil tank edge in the explosion-proof optimization design of the transformer oil tank edge structure provided in the third embodiment of the present invention.

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

[0022] In the figure, 1, box edge; 11, horizontal part; 111, sealing part; 12, vertical part; 2, oil tank top cover; 3, reinforcing ribs; 31, rectangular plate; 311, groove; 312, first avoidance; 313, second avoidance; 4, reinforcing unit; 41, vertical reinforcing plate; 42, horizontal reinforcing plate; 5, box side wall; 6, bolts; 7, vertical plate. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] First embodiment:

[0025] Reference Figure 2 , which is an explosion-proof optimization design of a transformer oil tank edge structure disclosed in the first embodiment of the present invention, comprising an edge 1, an oil tank top cover 2 and a reinforcing rib 3; the edge 1 comprises a horizontal portion 11 and a vertical portion 12, the top of the vertical portion 12 is connected to the bottom surface of the horizontal portion 11, the horizontal portion 11 and the vertical portion 12 are integrally formed, and the end of the vertical portion 12 away from the horizontal portion 11 is butt-welded to the tank side wall 5 of the transformer oil tank, the oil tank top cover 2 is inserted into the horizontal portion 11, the oil tank top cover 2 and the horizontal portion 11 are butt-welded, and a reinforcing rib 3 is arranged at the welding position of the oil tank top cover 2 and the horizontal portion 11, one end of the reinforcing rib 3 is butt-welded to the top surface of the oil tank top cover 2, and the other end of the reinforcing rib 3 is butt-welded to the edge 1; such a configuration reduces the number of welds and shifts the weld position to improve the stress state of the weld, and with the reinforcement rib 3 at the weld, the explosion-proof performance of the transformer oil tank edge 1 structure can be greatly improved, and the arc fault defense capability of the transformer oil tank can be improved.

[0026] Specifically, one end of the vertical portion 12 away from the horizontal portion 11 is butt-welded to the tank side wall 5 of the transformer oil tank by using variable thickness plane.

[0027] The tank edge 1 is made of structural steel with a corner structure, such as I-beam, T-beam, H-beam, L-beam, etc. The structure of the transformer oil tank tank edge 1 can be made by the structural steel bending forming process, so that the horizontal part 11 and the vertical part 12 are an integral part. This arrangement avoids T-shaped welds, and the explosion-proof performance of the complete structure is much higher than that of the split-welded structure, thereby improving the explosion-proof performance of the transformer oil tank tank edge 1 structure.

[0028] like Figure 3 As shown, the transformer oil tank edge structure can be formed by integral bending, so that only one weld seam is used to close the tank edge 1. The transformer oil tank edge 1 structure can also be decomposed into Figure 3 As shown in the figure, the bending corners are processed separately, and the straight sections are still made of structural steel. The small sections are connected by butt welding to form a closed structure.

[0029] Continue to refer to Figure 2 In this embodiment, a sinking platform is provided on the top surface of the horizontal portion 11, and the sinking platform is matched with the fuel tank top cover 2. The fuel tank top cover 2 is placed in the sinking platform, and the side wall of the fuel tank top cover 2 and the step surface of the sinking platform are butt-welded. Such a setting improves the welding strength between the fuel tank top cover 2 and the horizontal portion 11.

[0030] Specifically, the side wall of the top cover 2 of the fuel tank is butt-welded to the step surface of the sunken platform, and a reinforcing rib 3 is provided at the weld seam between the top cover 2 of the fuel tank and the horizontal part 11 to enhance the connection strength between the top cover 2 of the fuel tank and the horizontal part 11.

[0031] Furthermore, in this embodiment, the reinforcing rib 3 is in the shape of a C-shaped sheet. One end of the reinforcing rib 3 is butt-welded to the top surface of the top cover 2 of the fuel tank, and the other end of the reinforcing rib 3 is butt-welded to the top surface of the horizontal part 11. By providing the C-shaped reinforcing rib 3, thereby, the connection strength and the local anti-deformation ability between the top cover 2 of the fuel tank and the horizontal part 11 are improved.

[0032] The explosion-proof optimization design of the transformer fuel tank box edge structure provided in this embodiment further includes a strengthening unit 4. The two ends of the strengthening unit 4 are respectively butt-welded to two faces that are orthogonal to each other between the vertical part 12 and the horizontal part 11. By providing the strengthening unit 4, it is to prevent the bending and flipping deformation of the box edge 1 at the horizontal part 11 - vertical part 12.

[0033] Specifically, one end of the strengthening unit 4 is butt-welded to the side wall of the vertical part 12, and the other end of the strengthening unit 4 is butt-welded to the bottom surface of the horizontal part 11.

[0034] Furthermore, in this embodiment, the strengthening unit 4 includes a vertical strengthening plate 41 and a horizontal strengthening plate 42. One end of the horizontal strengthening plate 42 is butt-welded to the side surface of the vertical part 12, the bottom end of the vertical strengthening plate 41 is butt-welded to the top surface of the horizontal strengthening plate 42, and the top end of the vertical strengthening plate 41 is butt-welded to the bottom surface of the horizontal part 11.

[0035] Specifically, the extending direction of the vertical strengthening plate 41 is parallel to the extending direction of the vertical part 12, and the extending direction of the horizontal strengthening plate 42 is parallel to the extending direction of the horizontal part 11.

[0036] Furthermore, in this embodiment, a sealing groove 311 for installing a seal 111 is provided on the bottom surface of the sunken platform.

[0037] Specifically, a seal 111 is inserted into the sealing groove 311, and the seal 111 is a metal seal 111.

[0038] Second Embodiment:

[0039] Continue to refer to Figure 4, the second embodiment of the present invention provides an explosion-proof optimization design for the flange structure of a transformer tank, and this system can also be applied to the explosion-proof optimization design for the flange structure of the transformer tank provided in the above first embodiment. The difference between it and the explosion-proof optimization design for the flange structure of the transformer tank provided in the above embodiment is that: the reinforcing rib 3 includes a rectangular plate 31, and a recessed groove 311 is formed on one side of the rectangular plate 31. A first avoidance opening 312 and a second avoidance opening 313 are formed on the inner top wall of the recessed groove 311. The first avoidance opening 312 is correspondingly arranged at the welding position of the tank top cover 2 and the horizontal part 11, and the second avoidance opening 313 is located at the inner corner of the recessed groove 311, and the second avoidance opening 313 is correspondingly arranged with the top angle of the horizontal part 11; one end of the tank top cover 2 and one end of the horizontal part 11 are both inserted into the recessed groove 311. The side wall of the horizontal part 11 abuts against the inner side wall of the recessed groove 311, the side wall of the rectangular plate 31 abuts against the side surface of the vertical part 12, the top surfaces of the tank top cover 2 and the horizontal part 11 are both connected by butt welding with the inner top wall of the recessed groove 311, and the side wall of the rectangular plate 31 is connected by butt welding with the side surface of the vertical part 12.

[0040] Specifically, the rectangular plate 31 provided with the recessed groove 311 recessed inward is in a C shape. Both the first avoidance opening 312 and the second avoidance opening 313 are in an arc shape.

[0041] The explosion-proof optimization design for the flange structure 1 of the transformer tank provided in this embodiment further includes a vertical plate 7. The vertical plate 7 is arranged in the recessed groove 311. The top end of the vertical plate 7 is connected by butt welding with the bottom surface of the horizontal part 11, and the bottom end of the vertical plate 7 is connected by butt welding with the inner bottom surface of the recessed groove 311.

[0042] Specifically, the extending direction of the vertical plate 7 is arranged parallel to the extending direction of the vertical part 12.

[0043] Third embodiment:

[0044] Continue to refer to Figure 5 and Figure 6 , the third embodiment of the present invention provides an explosion-proof optimization design for the flange structure of a transformer tank, and this system can also be applied to the explosion-proof optimization design for the flange structure of the transformer tank provided in the above second embodiment. The difference between it and the explosion-proof optimization design for the flange structure of the transformer tank provided in the above embodiment is that: the explosion-proof optimization design for the flange structure of the transformer tank provided in this embodiment further includes a plurality of bolts 6. One end of the bolt 6 passes through the tank top cover 2 and is threadedly connected with the horizontal part 11, and the bolts 6 and the reinforcing ribs 3 are arranged alternately; with such an arrangement, the connection strength between the tank top cover 2 and the horizontal part 11 is further improved.

[0045] The explosion-proof optimization design of the transformer oil tank edge structure provided in the present application includes a box edge 1, a tank top cover 2 and a reinforcing rib 3; the box edge 1 includes a horizontal portion 11 and a vertical portion 12, the top of the vertical portion 12 is connected to the bottom surface of the horizontal portion 11, the horizontal portion 11 and the vertical portion 12 are integrally formed, and the end of the vertical portion 12 away from the horizontal portion 11 is butt-welded to the box side wall 5 of the transformer oil tank, the tank top cover 2 is inserted into the horizontal portion 11, the tank top cover 2 and the horizontal portion 11 are butt-welded, and a reinforcing rib 3 is arranged at the welding position of the tank top cover 2 and the horizontal portion 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 box edge 1; such a configuration reduces the number of welds and shifts the weld position to improve the stress state of the weld, and with the assistance of the reinforcing rib 3 at the weld, the explosion-proof performance of the transformer oil tank box edge 1 structure can be greatly improved, and the arc fault defense capability of the transformer oil tank can be improved.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0047] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An explosion-proof optimization design of the tank rim structure of a transformer, characterized in that: Including tank edge, fuel tank top cover and reinforcement 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 tank 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, the reinforcing rib is provided at the welding position of 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.

2. The explosion-proof optimization design of the transformer tank flange structure according to claim 1, characterized in that: A sinking platform is arranged on the top surface of the horizontal part, and the sinking platform is matched with the oil tank top cover. The oil tank top cover is placed in the sinking platform, and the side wall of the oil tank top cover is butt-welded to the step surface of the sinking platform.

3. The explosion-proof optimization design of the transformer tank flange structure according to claim 2, characterized in that: The bottom surface of the sink is provided with a sealing groove for installing a sealing member.

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

5. The explosion-proof optimization design of the transformer tank flange structure according to claim 1, characterized in that: The reinforcing rib is in the shape of a C-shaped sheet, one end of the reinforcing rib is connected to the top surface of the tank top cover by butt welding, and the other end of the reinforcing rib is connected to the top surface of the horizontal part by butt welding.

6. The explosion-proof optimization design of the transformer tank flange structure according to claim 5, characterized in that: It also includes a reinforcing unit, both ends of which are respectively butt-welded to two surfaces orthogonal to the vertical portion and the horizontal portion.

7. The explosion-proof optimization design of the transformer tank flange structure according to claim 6, characterized in that: The reinforcement unit includes a vertical reinforcement plate and a horizontal reinforcement plate, one end of the horizontal reinforcement plate is butt-welded to the side of the vertical part, the bottom end of the vertical reinforcement plate is butt-welded to the top surface of the horizontal reinforcement plate, and the top end of the vertical reinforcement plate is butt-welded to the bottom surface of the horizontal part.

8. The explosion-proof optimization design of the transformer tank flange structure according to claim 1, characterized in that: The reinforcing rib comprises a rectangular plate, one side of the rectangular plate is provided with an inwardly recessed groove, an inner top wall of the groove is provided with a first avoidance opening and a second avoidance opening, the first avoidance opening and the welding position of the fuel tank top cover and the horizontal portion are arranged correspondingly, the second avoidance opening is located at the inner corner of the groove, and the second avoidance opening is arranged correspondingly to the top corner of the horizontal portion; One end of the oil 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 surface of the vertical part, the top surface of the oil tank top cover and the top surface of the horizontal part are both butt-welded to the inner top wall of the groove, and the side wall of the rectangular plate is butt-welded to the side surface of the vertical part.

9. The explosion-proof optimization design of the transformer tank flange structure according to claim 8, characterized in that: It also includes a vertical plate, which is arranged in the groove, the top end of the vertical plate is butt-welded to the bottom surface of the horizontal portion, and the bottom end of the vertical plate is butt-welded to the inner bottom surface of the groove.

10. The explosion-proof optimization design of the transformer tank flange structure according to claim 9, characterized in that: It also includes a plurality of bolts, one end of each of which passes through the oil tank top cover and is threadedly connected to the horizontal portion, and the bolts and the reinforcing ribs are alternately arranged.

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