Emergency Tank Device

Abstract

To provide an emergency tank device for insulating oil of a transformer that can improve workability during installation. [Solution] An emergency tank device 100 that has an oil tank section 10 and a lid section 20 that covers the opening 102 of the oil tank section 10, and that stores insulating oil sent from a transformer through an oil supply pipe 202, and has a relay pipe 30 whose one end communicates with the inside of the oil tank section 10 through a through hole 21 formed in the lid section 20 and whose other end is connected to the oil supply pipe 202, and the diameter of the through hole 21 is larger than the outer diameter of the relay pipe 30.

Description

[Technical Field]

[0001] The present invention relates to an emergency tank arrangement for transformer insulating oil. [Background technology]

[0002] In the event of an emergency such as a short circuit, the insulating oil inside the transformer may overheat, generating gas, and the resulting increase in gas pressure may cause the insulating oil to leak outside the transformer. To prepare for such an emergency, the transformer is connected to an emergency tank device in addition to a conservator, which transfers and temporarily stores the insulating oil inside the transformer. That is, the emergency tank device is connected to the transformer via an oil supply pipe, and insulating oil is sent from the transformer in the event of an emergency.

[0003] For example, Patent Document 1 describes that an emergency tank device is placed on top of the tank of a transformer, thereby saving space and making the transformer more compact. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 07-0094337 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, the emergency tank device is connected to the transformer via an oil supply pipe, and generally, the tip of the oil supply pipe is fixed by welding to the edge of a through hole formed in the lid of the emergency tank device, and the insulating oil sent from the transformer to the emergency tank device via the oil supply pipe flows down from the tip of the oil supply pipe into the oil tank of the emergency tank device.

[0006] For these reasons, in the past, when installing an emergency tank device for insulating oil, a through hole was drilled in the lid to match the position of the tip of the oil pipe, and then the tip of the oil pipe was welded to the edge of the through hole to prevent foreign matter from entering the emergency tank device.

[0007] However, the above-mentioned work of drilling a through hole in the lid portion so that it matches the position of the tip of the oil pipe and the work of welding the tip of the oil pipe to the edge of the through hole are cumbersome tasks, which reduce the workability in installing the emergency tank device for insulating oil, and ultimately reduce productivity.

[0008] However, the emergency tank device of Patent Document 1 does not consider such problems and is unable to address them.

[0009] The present invention has been made in view of the above circumstances, and has as its object to provide an emergency tank device for insulating oil of a transformer that can improve workability during installation. [Means for solving the problem]

[0010] The emergency tank device of the present invention comprises an oil tank section and a lid section that covers the opening of the oil tank section, and is an emergency tank device that stores insulating oil sent from a transformer through an oil supply pipe, and comprises a relay pipe whose one end communicates with the inside of the oil tank section through a through hole formed in the lid section and whose other end is connected to the oil supply pipe, and whose diameter of the through hole is larger than the outer diameter of the relay pipe. [Effects of the Invention]

[0011] According to the present invention, an emergency tank device for insulating oil of a transformer can be provided, which can improve workability during installation. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing an emergency tank device according to a first embodiment of the present invention. [Figure 2] 1 is a diagram showing an oil tank section of an emergency tank device according to a first embodiment. FIG. [Figure 3] 3 is a view showing a cover part of the emergency tank device according to the first embodiment. FIG. [Figure 4] 3 is a diagram showing a relay pipe and a cover part of the emergency tank device according to the first embodiment. FIG. [Figure 5] FIG. 2 is a vertical cross-sectional view of the emergency tank device according to the first embodiment. [Figure 6] FIG. 10 is a vertical cross-sectional view of an emergency tank device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Transformers store insulating oil inside and are equipped with an emergency tank device to transfer the insulating oil in an emergency. For example, in the event of an emergency such as a sudden increase in gas pressure inside the transformer due to a short circuit, the insulating oil is sent to the emergency tank device. The present invention relates to such an emergency tank device. The present invention will now be described with reference to the drawings showing embodiments thereof.

[0014] (Embodiment 1) Fig. 1 is a diagram showing an emergency tank device 100 according to a first embodiment of the present invention. For convenience, Fig. 1 shows the emergency tank device 100 attached to a transformer 200, and a portion of the transformer 200 is not shown.

[0015] The emergency tank device 100 according to the first embodiment includes an oil tank section 10, a lid section 20, a relay pipe 30, a cover section 40, and a mesh cylinder section 50. The emergency tank device 100 is attached to a transformer 200 and connected to the transformer 200 via the relay pipe 30.

[0016] The oil tank section 10 is fixed to the side wall of the transformer 200, and an opening 102 (see FIG. 2) is covered by a lid section 20. The oil tank section 10 is in communication with an oil supply pipe 202 of the transformer 200 via a relay pipe 30.

[0017] Fig. 2 is a diagram showing the oil tank section 10 of the emergency tank device 100 according to embodiment 1. Fig. 2A is a front view of the oil tank section 10, Fig. 2B is a side view of the oil tank section 10, and Fig. 2C is a plan view of the oil tank section 10.

[0018] The oil tank 10 is made of metal and has a cylindrical tank 101 with a bottom. The tank 101 is open at the top, forming a circular opening 102. The upper end of the tank 101 is bent radially outward from the tank 10 to form a flange 103. That is, the flange 103 has a hollow disk shape in a plan view, and has a plurality of through holes 104 formed at equal intervals in the circumferential direction. In the event of an emergency, insulating oil is sent from the transformer 200 to the emergency tank device 100 via the oil supply pipe 202 and stored in the tank portion 101.

[0019] In addition, the oil tank 10 has a mounting bracket 11 and a hanging bracket 12 provided on the outer circumferential surface of the tank 101.

[0020] The hanging fittings 12 are made of metal, D-shaped, and provided on the upper part of the side wall of the tank part 101. More specifically, two hanging fittings 12 are provided on the tank part 101, and each hanging fitting 12 is provided at a corresponding position in the radial direction of the tank part 101. The hanging fittings 12 are used, for example, to transport the emergency tank device 100.

[0021] The mounting bracket 11 is made of metal and is provided between the two hanging brackets 12 in the circumferential direction of the tank part 101. The two mounting brackets 11 are provided on the tank part 101, spaced apart in the vertical direction.

[0022] Each mounting bracket 11 is made of metal and has a plate shape, and protrudes from the outer peripheral surface of the tank portion 101 to the outside of the tank portion 101 in the radial direction of the tank portion 101, i.e., in a direction perpendicular to the axial direction of the tank portion 101. The protruding end of the mounting bracket 11 is bent downward, and a through hole 111 is formed in this protruding end.

[0023] The tank part 101 (emergency tank device 100) is fixed to the transformer 200 by passing a bolt through the through hole 111 and tightening it with a nut using a fixture 201 of the transformer 200 (see FIG. 1). In the emergency tank device 100, the oil tank section 10 is provided with an oil drain pipe and an oil drain valve (not shown).

[0024] Fig. 3 is a diagram showing the cover 20 of the emergency tank device 100 according to embodiment 1. Fig. 3A is a plan view of the cover 20, and Fig. 3B is a side view of the cover 20.

[0025] The lid 20 is made of metal, similar to the oil tank 10, and covers the opening 102 of the tank 101. The lid 20 has a flat, disk-shaped lid body 24 and a first guard portion 22, and the lid body 24 has a through-hole 21 formed therein.

[0026] The diameter of the lid body 24 is slightly larger than the diameter of the opening 102, and more specifically, is the same as the outer diameter of the flange portion 103 of the tank portion 101. A plurality of bolt holes 23 are formed at equal intervals in the circumferential direction on the edge portion of the lid body 24. The bolt holes 23 are through holes that penetrate the lid body 24 in the thickness direction, and are formed at positions in the up-down direction that correspond to the through holes 104 of the tank portion 101 (flange portion 103).

[0027] That is, the lid 24 is disposed on the same axis as the oil tank 10 (tank 101), and bolts are inserted into the bolt holes 23 of the lid 24 and the through holes 104 of the tank 101 and tightened with nuts, thereby fixing the lid 20 to the oil tank 10. An O-ring R (see FIG. 1) is interposed between the edge of the lid 24 and the flange 103 of the tank 101.

[0028] The through-hole 21 is circular and penetrates the lid 24 in the thickness direction, and is located off-center from the center of the lid 24 toward the edge of the lid 24. More specifically, the through-hole 21 is located on the edge of the lid 24 at a position corresponding to the mounting bracket 11 of the oil tank section 10 in the vertical direction, i.e., at a position on the edge of the lid 24 near the transformer 200.

[0029] Furthermore, a first guard portion 22 is provided to protrude from the upper surface of the lid body 24 so as to surround the through-hole 21. More specifically, the first guard portion 22 extends upward and is provided around the edge of the through-hole 21. In other words, the first guard portion 22 has a cylindrical shape with an inner diameter that is the same as the diameter of the through-hole 21, and protrudes upward from the edge of the through-hole 21. For example, the first guard portion 22 is made of the same metal as the lid body 24.

[0030] Fig. 4 is a diagram showing the relay pipe 30 and the cover portion 40 of the emergency tank device 100 according to embodiment 1. Fig. 4A is a plan view of the relay pipe 30, and Fig. 4B is a side view of the relay pipe 30 and the cover portion 40. For ease of explanation, Fig. 4B shows a cross-sectional view of the relay pipe 30 and the cover portion 40 cut in half. The relay pipe 30 has a cylindrical portion 31 to which a cover portion 40 is attached.

[0031] The cylindrical portion 31 of the relay pipe 30 is made of metal and has a cylindrical shape that extends in the vertical direction. One upper end of the cylindrical portion 31 is connected to an end of the oil feed pipe 202 of the transformer 200 (see FIG. 1). The other lower end of the cylindrical portion 31 opens into the oil tank portion 10 through the through-hole 21 of the lid portion 20.

[0032] Fig. 5 is a vertical cross-sectional view of the emergency tank device 100 according to embodiment 1. For convenience, Fig. 5 shows only a part of the oil tank section 10, and the mesh cylinder section 50 is indicated by a two-dot chain line.

[0033] The cylindrical portion 31 is inserted into the first guard portion 22 and arranged on the same axis as the through hole 21 (first guard portion 22), and the other end of the cylindrical portion 31 is connected to the inside of the oil tank portion 10 via the through hole 21.

[0034] The outer diameter of the cylindrical portion 31 is smaller than the diameter of the through-hole 21 of the lid portion 20. That is, the outer diameter of the cylindrical portion 31 is smaller than the inner diameter of the first guard portion 22 of the lid portion 20. In addition, in the vertical direction, the other end of the cylindrical portion 31 is disposed in the same plane as the through-hole 21. Therefore, a certain gap is formed between the lower end of the cylindrical portion 31 and the edge of the through-hole 21 (see FIG. 5).

[0035] One upper end of the cylindrical portion 31 is bent radially outward from the cylindrical portion 31 to form a connecting flange 32. That is, the connecting flange 32 has a hollow disk shape in a plan view. The connecting flange 32 has four connecting bolt holes 33 formed at equal intervals in the circumferential direction.

[0036] Therefore, the relay pipe 30 is arranged on the same axis as the oil feed pipe 202 of the transformer 200, and is connected to the end of the oil feed pipe 202 by inserting bolts into the connecting bolt holes 33 of the relay pipe 30 (connecting flange 32) and through holes (not shown) in the flange provided at the lower end of the oil feed pipe 202 and fastening them with nuts or by riveting. At this time, an O-ring R is interposed between the connecting flange 32 and the flange at the lower end of the oil feed pipe 202. In other words, the relay pipe 30 is configured to be attachable to and detachable from the oil feed pipe 202 as necessary.

[0037] As described above, the cover portion 40 is attached to the cylindrical portion 31 of the relay pipe 30. The cover portion 40 is provided on the outer peripheral surface of the cylindrical portion 31 and covers the through-hole 21 (above the first guard portion 22) of the lid portion 20. The cover portion 40 has a flat portion 42 and a second guard portion 41.

[0038] The flat portion 42 has a flat plate shape and is arranged so as to face the through hole 21 of the lid portion 20 in the vertical direction, i.e., so as to be perpendicular to the axial direction of the first guard portion 22. The flat portion 42 is arranged radially outward from the cylindrical portion 31 at the middle portion of the outer circumferential surface of the cylindrical portion 31 in the vertical direction. The dimension from the base to the tip of the flat portion 42 is constant in the circumferential direction. In other words, the flat portion 42 has a hollow disk shape in a plan view and is fitted onto the cylindrical portion 31. The outer diameter of the flat portion 42 is larger than the outer diameter of the first guard portion 22 of the lid portion 20. The flat portion 42 is attached to the cylindrical portion 31 by, for example, welding or riveting.

[0039] The second guard portion 41 is provided around the edge of the flat portion 42 and extends downward. That is, the second guard portion 41 is cylindrical and is provided on the flat portion 42 with its axis oriented in the up-down direction. The dimension from the base to the lower end of the second guard portion 41 is constant in the circumferential direction, and the inner diameter of the second guard portion 41 is larger than the outer diameter of the first guard portion 22. That is, the second guard portion 41 is disposed outward of the first guard portion 22. Furthermore, the lower end of the second guard portion 41 is located below the upper end of the first guard portion 22 (see FIG. 5).

[0040] That is, the first guard portion 22 and the second guard portion 41 partially overlap in the radial direction of the second guard portion 41, in other words, in the radial direction of the first guard portion 22. The upper end of the first guard portion 22 is disposed below and spaced apart from the flat portion 42 of the cover portion 40, and the lower end of the second guard portion 41 is disposed above and spaced apart from the lid body 24 of the lid portion 20.

[0041] As described above, a gap (see L1 in FIG. 5) is formed between the first guard portion 22 and the cylindrical portion 31 of the relay pipe 30. The gap L2 between the first guard portion 22 and the second guard portion 41 is the same as the gap L1 between the first guard portion 22 and the cylindrical portion 31 (see FIG. 5).

[0042] The mesh cylinder portion 50 is fitted onto the outer peripheral surface of the cover portion 40 (see FIGS. 1 and 5). That is, the mesh cylinder portion 50 has a cylindrical shape. The lower end of the mesh cylinder portion 50 abuts against the upper surface of the lid body 24 of the lid portion 20.

[0043] As described above, in the emergency tank device 100 according to the first embodiment, one end of the cylindrical portion 31 of the relay pipe 30 is connected to the end of the oil supply pipe 202, and the other end of the cylindrical portion 31 is connected to the inside of the oil tank portion 10 via the through-hole 21 of the lid portion 20. In addition, the outer diameter of the cylindrical portion 31 is smaller than the diameter of the through-hole 21 (first guard portion 22) of the lid portion 20, and a gap L1 is formed between the first guard portion 22 and the cylindrical portion 31.

[0044] Therefore, in the event of an emergency as described above, when insulating oil in transformer 200 is sent to emergency tank device 100 via oil supply pipe 202, the insulating oil is guided to relay pipe 30 and flows down into tank portion 101 of oil tank portion 10 (see dashed arrows in FIG. 5). At this time, air inside tank portion 101 passes through gap L1 between first guard portion 22 and cylindrical portion 31 and gap L2 between first guard portion 22 and second guard portion 41 and is discharged to the outside of relay pipe 30 (see dashed arrows in FIG. 5).

[0045] Meanwhile, conventionally, when attaching an emergency tank device to a transformer 200, it is necessary to align the lower end of the oil feed pipe 202 with the position of the through-hole of the emergency tank device, drill a through-hole in the cover of the emergency tank device, and then perform an oil feed pipe connection work to close the gap between the oil feed pipe 202 and the through-hole by welding. Furthermore, in addition to this oil feed pipe connection work, it is also necessary to perform an exhaust route work to separately install an exhaust port and exhaust pipe in the emergency tank device so that the internal air can escape when insulating oil flows in.

[0046] However, the above-mentioned oil pipe connection work and exhaust line work are time-consuming tasks that involve many steps, such as aligning the oil pipe 202 with the through hole of the emergency tank device and welding, and this reduces the productivity of the emergency tank device 100.

[0047] In contrast, the emergency tank device 100 of embodiment 1 simply connects one end of the cylindrical portion 31 of the relay pipe 30 to the end of the oil supply pipe 202, as described above, and positions the other end of the cylindrical portion 31 inside the first guard portion 22 of the lid portion 20.

[0048] That is, since the outer diameter of the cylindrical portion 31 is smaller than the diameter of the first guard portion 22 (through hole 21), it is easy to align the relay pipe 30 (cylindrical portion 31) with the first guard portion 22 (through hole 21).

[0049] Furthermore, since the through hole 21 is covered by the cover portion 40, it is possible to prevent rainwater, dust, etc. from entering the relay pipe 30 through the through hole 21, and there is no need to block the through hole 21, eliminating the need for a welding process.

[0050] Furthermore, since air is discharged to the outside through the gap L1 between the cylindrical portion 31 and the first guard portion 22, and the gap L2 between the first guard portion 22 and the second guard portion 41, there is no need to provide a separate exhaust port or exhaust pipe.

[0051] Therefore, the emergency tank device 100 according to the first embodiment improves workability in the installation process, and can be made compact and increase productivity.

[0052] Furthermore, in the emergency tank device 100 according to the first embodiment, as described above, the first guard portion 22 is provided around the edge of the through-hole 21, extending upward, and therefore rainwater can be prevented from flowing over the upper surface of the cover body 24 of the lid portion 20 and flowing into the relay pipe 30 through the through-hole 21. Furthermore, since the cylindrical portion 31 is inserted into the first guard portion 22, it also serves as a guide when aligning the cylindrical portion 31 with the through-hole 21. In addition, it is possible to prevent the insulating oil that has fallen from bouncing back and splashing out through the through-hole 21.

[0053] Furthermore, in the emergency tank device 100 of embodiment 1, as described above, the first guard portion 22 and the second guard portion 41 overlap in the radial direction of the second guard portion 41, i.e., in the radial direction of the first guard portion 22, so that rainwater droplets can be prevented from being carried by the wind and entering the relay pipe 30 through the through hole 21.

[0054] As described above, the emergency tank device 100 according to the first embodiment is provided with the mesh cylinder part 50, and therefore can prevent insects from entering the relay pipe 30 through the through-hole 21. Furthermore, since the mesh cylinder part 50 has a cylindrical shape and is fitted onto the outer peripheral surface of the second guard part 41 of the cover part 40, the installation work of the mesh cylinder part 50 is simple.

[0055] As described above, in the emergency tank device 100 of embodiment 1, the through hole 21 is formed at a position near the edge of the cover body 24, i.e., at a position near the edge of the cover body 24 and the transformer 200, so that the length of the oil supply pipe 202 can be shortened.

[0056] In the above, an example has been described in which the flat portion 42 has a flat plate shape and is provided so as to be perpendicular to the axial direction of the first guard portion 22, but the emergency tank device 100 according to the first embodiment is not limited to this. For example, the flat portion 42 may be configured so as to slope downward from the base to the tip.

[0057] In the above description, the first guard portion 22 is provided around the edge of the through hole 21 of the lid portion 20, but the present invention is not limited to this. For example, the first guard portion 22 having an inner diameter larger than the diameter of the through hole 21 may be provided so as to protrude from the edge of the through hole 21 at a position slightly spaced apart in the radial direction of the through hole 21 so as to surround the through hole 21.

[0058] (Embodiment 2) The emergency tank device 100 according to the second embodiment, like the emergency tank device 100 according to the first embodiment, comprises an oil tank section 10, a lid section 20, a relay pipe 30, a cover section 40, and a mesh tube section 50. The emergency tank device 100 according to the second embodiment differs from the first embodiment only in the configuration of the lid section 20 and the cover section 40, and therefore the following description will mainly focus on the lid section 20 and the cover section 40.

[0059] Fig. 6 is a vertical cross-sectional view of the emergency tank device 100 according to embodiment 2. For convenience, Fig. 6 shows only a part of the oil tank section 10, and the mesh cylinder section 50 is not shown.

[0060] The lid portion 20 has a lid body 24, a through hole 21, and a first guard portion 22A. The lid body 24 and the through hole 21 are the same as those in the first embodiment, and detailed description thereof will be omitted.

[0061] The first guard portion 22A is provided around the edge of the through-hole 21. That is, the first guard portion 22A is cylindrical in shape with an inner diameter that is the same as the diameter of the through-hole 21, and is provided to protrude upward from the edge of the through-hole 21. For example, the first guard portion 22A is made of the same metal as the cover body 24.

[0062] In the emergency tank device 100 according to the second embodiment, the upper end of the first guard part 22A is bent radially outward from the first guard part 22A, i.e., toward the second guard part 41A (described later) of the cover part 40, to form an outer bent part 221 (upper end part). In other words, the outer bent part 221 has a hollow disk shape in a plan view.

[0063] The relay pipe 30 has a cylindrical portion 31, and a connecting flange 32 is formed at one end on the upper side of the cylindrical portion 31, and connecting bolt holes 33 are formed in four locations on the connecting flange 32. The cylindrical portion 31, connecting flange 32, and connecting bolt holes 33 are the same as those in the first embodiment, and detailed explanations thereof will be omitted.

[0064] A cover portion 40 is provided on the cylindrical portion 31 of the relay pipe 30. The cover portion 40 is provided on the outer peripheral surface of the cylindrical portion 31 and covers the through hole 21 (above the first guard portion 22A) of the lid portion 20. The cover portion 40 has a flat portion 42 and a second guard portion 41A. The flat portion 42 is the same as in the first embodiment, and a detailed description thereof will be omitted.

[0065] The second guard portion 41A is provided around the edge of the flat portion 42. The second guard portion 41 is cylindrical and is provided on the flat portion 42 with its axis extending in the up-down direction. The second guard portion 41A extends downward, and the dimension from its base to its lower end is constant in the circumferential direction. The inner diameter of the second guard portion 41A is larger than the outer diameter of the first guard portion 22 and is larger than the outer diameter of the outer bent portion 221 of the first guard portion 22A. In other words, the second guard portion 41A is disposed outside the first guard portion 22A.

[0066] In the emergency tank device 100 according to the second embodiment, the lower end of the second guard part 41A is bent radially inward of the second guard part 41A, i.e., toward the first guard part 22A of the cover part 20, to form an inner bent part 411 (lower end part). In other words, the inner bent part 411 has a hollow disk shape in a plan view. The lower end (inner bent part 411) of the second guard part 41A is located below the upper end (outer bent part 221) of the first guard part 22A.

[0067] That is, the first guard portion 22A and the second guard portion 41A partially overlap in the radial direction of the second guard portion 41A, in other words, in the radial direction of the first guard portion 22A. The upper end (outer bent portion 221) of the first guard portion 22A is disposed downward and spaced apart from the flat portion 42 of the cover portion 40, and the lower end (inner bent portion 411) of the second guard portion 41A is disposed upward and spaced apart from the lid body 24 of the lid portion 20.

[0068] A gap is formed between the first guard portion 22A and the cylindrical portion 31 of the relay pipe 30, and a gap is also formed between the first guard portion 22A and the second guard portion 41A. In particular, although relatively narrow, a gap is also formed between the outer bent portion 221 of the first guard portion 22A and the second guard portion 41A, and a gap is also formed between the inner bent portion 411 of the second guard portion 41A and the first guard portion 22A.

[0069] Furthermore, the outer bent portion 221 of the first guard portion 22A and the inner bent portion 411 of the second guard portion 41A are spaced apart and face each other in the vertical direction, that is, the first guard portion 22A and the second guard portion 41A form a so-called labyrinth structure.

[0070] As configured as described above, the emergency tank device 100 of embodiment 2 not only achieves the same effects as embodiment 1, but also has a labyrinth structure as described above, so can more reliably prevent rainwater from flowing into the oil tank section 10 from the outside and insects and the like from entering.

[0071] The same parts as those in the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

[0072] The technical features (constituent elements) described in the first and second embodiments can be combined with each other, and by combining them, new technical features can be achieved. The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the meaning and scope of the claims.

[0073] The matters described in each embodiment can be combined with each other. Furthermore, the independent claims and dependent claims described in the claims can be combined with each other in any and all combinations, regardless of the reference format. Furthermore, the claims use a format in which a claim references two or more other claims (multiple claim format), but this is not limited to this. A multiple claim (multi-multi claim) that references at least one other multiple claim may also be used. [Explanation of symbols]

[0074] 10: oil tank section, 20: lid section, 21: through hole, 24: lid body, 22, 22A: first guard section, 30: relay pipe, 31: cylindrical section, 40: cover section, 41, 41A: second guard section, 42: flat section, 50: mesh cylinder section, 100: emergency tank device, 102: opening, 202: oil transfer pipe, 221: outer bent section (upper end), 411: inner bent section (lower end), L1, L2: spacing

Claims

1. An emergency tank device comprising an oil tank section and a lid section for covering an opening of the oil tank section, and for storing insulating oil sent from a transformer through an oil supply pipe, a relay pipe having one end communicating with the oil tank through a through hole formed in the lid and the other end connected to the oil feed pipe; An emergency tank device in which the diameter of the through hole is larger than the outer diameter of the relay pipe.

2. a first guard portion that protrudes from an upper surface of the lid portion and surrounds the through hole; The emergency tank device according to claim 1, further comprising a cover portion provided on an outer peripheral surface of the relay pipe and covering the through hole.

3. The cover portion is a flat portion facing the through hole; a second guard portion provided around the edge of the flat portion and extending to a position below an upper end of the first guard portion, 3. The emergency tank device according to claim 2, wherein the second guard portion is disposed outside the first guard portion.

4. 4. The emergency tank device according to claim 3, wherein the distance between the first guard portion and the relay pipe is the same as the distance between the first guard portion and the second guard portion.

5. 2. The emergency tank device according to claim 1, wherein the through-hole is formed at a position near the edge of the lid.

6. a cylindrical mesh tube portion fitted onto the second guard portion, 4. The emergency tank device according to claim 3, wherein the lower end of the mesh tube portion abuts against the upper surface of the lid portion.

7. an upper end of the first guard portion is bent toward the second guard portion; a lower end of the second guard portion is bent toward the first guard portion, 4. The emergency tank device according to claim 3, wherein the upper end and the lower end are opposed to each other in the vertical direction.

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