CN218241552U - Lightning arrester for oil-immersed transformer - Google Patents
Lightning arrester for oil-immersed transformer Download PDFInfo
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- CN218241552U CN218241552U CN202222545845.1U CN202222545845U CN218241552U CN 218241552 U CN218241552 U CN 218241552U CN 202222545845 U CN202222545845 U CN 202222545845U CN 218241552 U CN218241552 U CN 218241552U
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Abstract
The utility model provides an arrester for oil-immersed transformer, includes arrester body, arrester flange and sealing element, the arrester flange is fixed at the arrester body, and the arrester body passes through arrester flange fixed mounting on the oil tank, be provided with protruding plane in oil tank top on the oil tank top horizontal plane of oil tank be provided with the arc transition between protruding plane in oil tank top and the oil tank top horizontal plane, the arrester flange includes flat straight section of flange and flange segmental arc, flat straight section of flange and flange segmental arc correspond the cooperation with protruding plane in oil tank top and arc transition respectively, sealing element sets up between flat straight section of flange and the protruding plane in oil tank top and flange segmental arc and the arc transition. This arrester has realized the promotion of arrester mounting structure prevention of seepage water effect through setting up the arrester flange to straight section and arc section and set up protruding plane and the arc transition of complex with it on the oil tank top.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to a lightning arrester for oil-immersed transformer.
Background
A transformer is a stationary electrical device used to transform ac voltage, current and transmit ac power. Oil-immersed transformers are a common type of transformer, and transformers using transformer oil as an insulating and cooling medium are oil-immersed transformers which are particularly suitable for outdoor environments. The oil-immersed transformer comprises an oil tank and a transformer body, wherein the transformer body is arranged in the oil tank and immersed in insulating oil of the oil tank. In the prior art, a small-capacity oil-immersed transformer is generally matched with a composite-sheathed zinc oxide arrester, and the composite-sheathed zinc oxide arrester is usually installed on an outdoor power transmission line. When abnormal high voltage occurs on the transmission line, the composite coat zinc oxide arrester can act to guide high voltage impact current to the ground, thereby protecting the transformer.
The arrester of many current oil-immersed transformers is installed at oil-immersed transformer top, runs through the oil tank and immerses in insulating oil, and such an example can see the oil-immersed transformer with plug-in type arrester that the chinese utility model patent of publication number CN208767140U disclosed, and its plug-in type arrester's base is located the oil tank, and the plug is located outside the oil tank, is qualified for the next round of competitions and is connected with the plug electricity through the base.
Although the above type of lightning arrester achieves the advantages of small occupied space and compact layout, a higher requirement is put on the sealing performance between the transformer oil tank and the lightning arrester, as is well known, the insulating oil cannot permeate water and affects the insulating performance, but the transformer oil tank is made of spliced plate materials, and even if the upper plate is flat in design, actually, as shown in fig. 1, the upper surface of the oil tank 4 is pressed and deformed by the manufacturing and splicing process of the tank plate and a fastener in later installation, the levelness is limited, rainwater (possibly water accumulation caused by other reasons in the nature or man) may accumulate around the insertion part of the lightning arrester body 1 and the oil tank 4 (a in the figure indicates the part where water may accumulate), in this case, even if the primary sealing is performed between the lightning arrester flange 2 and the upper plate of the oil tank 4 through the sealing element 3, rainwater or other external water may permeate from the gap of the sealing element, and when the force becomes loose or the fastening element is aged, the probability is higher, and the premature degradation of the water in the oil immersed transformer oil tank is also the cause of excessive degradation of the transformer.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a lightning arrester for oil-immersed transformer, this lightning arrester has realized the promotion of lightning arrester mounting structure prevention of seepage water effect through setting the lightning arrester flange to straight section and segmental arc and set up the protruding plane of complex and arc transition with it on the oil tank top.
The technical scheme of the utility model as follows:
the utility model provides an arrester for oil-immersed transformer, includes arrester body, arrester flange and sealing element, the arrester flange is fixed at the arrester body, and the arrester body passes through arrester flange fixed mounting on the oil tank, be provided with protruding plane in oil tank top on the oil tank top horizontal plane of oil tank be provided with the arc transition between protruding plane in oil tank top and the oil tank top horizontal plane, the arrester flange includes flat straight section of flange and flange segmental arc, flat straight section of flange and flange segmental arc correspond the cooperation with protruding plane in oil tank top and arc transition respectively, sealing element sets up between flat straight section of flange and the protruding plane in oil tank top and flange segmental arc and the arc transition.
Optionally, the sealing element is a flat gasket seal.
Preferably, the sealing element comprises a sealing straight section and a sealing arc-shaped section, and the sealing straight section and the sealing arc-shaped section are respectively matched with a mounting gap between the lower surface of the lightning arrester flange and the oil tank.
Further, a sealing part mounting large hole is formed in the center of the sealing element, and the lightning arrester body penetrates through the sealing part mounting large hole.
Further, the lightning arrester flange is fixed on the oil tank through bolt connection.
Further, a threaded hole is formed in the oil tank, a flange bolt mounting hole and a sealing part bolt mounting hole are formed in the arrester flange and the sealing element respectively, and a bolt penetrates through the flange bolt mounting hole and the sealing part bolt mounting hole and then is in threaded fit with the threaded hole.
Furthermore, an oil tank part installation large hole is formed in the plane of the protruding top of the oil tank, and the lightning arrester body penetrates through the oil tank part installation large hole.
Furthermore, the arrester body is split type, and the arrester flange is arrester base flange.
The beneficial effects of the utility model reside in that:
the utility model discloses a promotion that is used for oil-immersed transformer's arrester, this arrester through set the arrester flange to straight section and segmental arc and set up complex protruding plane and arc transition with it on the oil tank top and realized arrester mounting structure prevention of seepage water effect. In a preferred embodiment, the water-tight function of the structure is further enhanced by the sealing element being shaped to fit the gap between the flange of the arrester and the tank.
Drawings
The aspects and advantages of the present application will become apparent to those skilled in the art from a reading of the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
fig. 1 is a schematic structural diagram of a lightning arrester for an oil-immersed transformer in the prior art.
Fig. 2 is the utility model discloses a structural schematic diagram for oil-immersed transformer's arrester.
Fig. 3 is a schematic structural view of a lightning arrester flange.
Fig. 4 is a schematic view showing a specific structure of the sealing member.
Fig. 5 is a partial structure diagram of the matching part of the oil tank and the lightning arrester flange.
Fig. 6 is a schematic structural diagram of another arrester for an oil-immersed transformer according to an embodiment of the present invention.
The components represented by the reference numerals in the figures are:
1. the lightning arrester comprises a lightning arrester body, 2, a lightning arrester flange, 21, a flange straight section, 22, a flange arc section, 23, a flange part bolt mounting hole, 3, a sealing element, 31, a sealing straight section, 32, a sealing arc section, 33, a sealing part bolt mounting hole, 34, a sealing part mounting large hole, 4, an oil tank, 41, an oil tank top horizontal plane, 42, an oil tank top convex plane, 43, an arc transition, 44, a threaded hole, 45, an oil tank part mounting large hole, 46 and a reinforcing block.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Example 1
Referring to fig. 2, the arrester for the oil-immersed transformer of the embodiment includes an arrester body 1, an arrester flange 2 and a sealing element 3, the arrester flange 2 is fixed to the arrester body 1 or is integrally formed with the arrester body 1, the arrester body 1 is fixedly mounted on an oil tank 4 through the arrester flange 2, specifically, the arrester flange 2 is fixed to the oil tank 4 through bolt connection, as shown in fig. 5, a threaded hole 44 is provided on the oil tank 4, as shown in fig. 3 and 4, a flange bolt mounting hole 23 and a sealing portion bolt mounting hole 33 are respectively provided on the arrester flange 2 and the sealing element 3, and a bolt passes through the flange bolt mounting hole 23 and the sealing portion bolt mounting hole 33 and then is in threaded fit with the threaded hole 44.
The depth of the screw hole 44 drilled into the fuel tank 4 is determined by the thickness and strength of the fuel tank plate, and when the thickness of the fuel tank plate is not enough to provide enough installation strength, a reinforcing block 46 is provided on the inner side of the fuel tank 4 below the screw hole 44, as shown in fig. 2 and 5, the reinforcing block 46 is welded below the top plate before the fuel tank 4 is welded, and then the screw hole 44 is drilled, and the screw hole 44 cannot be drilled through the reinforcing block 46.
Be provided with protruding plane 42 in oil tank top on the oil tank top horizontal plane 41 of oil tank 4 be provided with arc transition 43 between protruding plane 42 in oil tank top and the oil tank top horizontal plane 41, arrester flange 2 includes the flat section 21 of flange and flange segmental arc 22, and the flat section 21 of flange and flange segmental arc 22 all describe from the cross section angle here, arrester flange 2 is the disc structure by this cross section formation, the flat section 21 of flange and flange segmental arc 22 correspond the cooperation with protruding plane 42 in oil tank top and arc transition 43 respectively, sealing element 3 sets up between flat section 21 of flange and the protruding plane 42 in oil tank top and flange segmental arc 22 and the arc transition 43.
Alternatively, the sealing element 3 is a flat gasket seal, and since the sealing element is flexible, even if the sealing element is a flat gasket seal, when the sealing element is installed between the lightning arrester flange 2 and the fuel tank 4, the sealing element is forced to deform to adapt to a gap between the lightning arrester flange 2 and the fuel tank 4, so that the sealing effect can be achieved.
Preferably, the sealing element 3 is made as a profiled gasket, so that its shape matches the mounting gap between the arrester flange 2 and the fuel tank 4, as shown in fig. 4, the sealing element 3 comprises a sealing straight section 31 and a sealing arc section 32, the sealing straight section 31 and the sealing arc section 32 are respectively adapted to the mounting gap between the lower surface of the arrester flange 2 and the fuel tank 4.
Further, a sealing part mounting large hole 34 is formed in the center of the sealing element 3, the lightning arrester body 1 penetrates through the sealing part mounting large hole 34, meanwhile, an oil tank part mounting large hole 45 is formed in the oil tank top protruding plane 42, and the lightning arrester body 1 penetrates through the oil tank part mounting large hole 45.
In the above solution, the flange arc-shaped section 22 of the arrester flange 2 and the arc-shaped transition 43 of the oil tank 4 should be matched as much as possible, and the radians of the flange arc-shaped section 22 and the arc-shaped transition 43 of the oil tank 4 may be approximately the same, or the radian of the flange arc-shaped section 22 of the arrester flange 2 may be designed to be smaller (slightly smaller) than the radian of the arc-shaped transition 43 of the oil tank 4, so as to further improve the side extrusion force.
This arrester that this embodiment provided has realized the promotion of arrester mounting structure prevention of seepage water effect through setting the arrester flange to straight section and segmental arc and set up the protruding plane of complex and arc transition with it on the oil tank top, and oil tank top installation arrester body department is provided with the arch and has tentatively raised this position, has reduced the contact probability with the rainwater of gathering, and simultaneously, sealing element goes out the downward sloping at the arc, has further avoided the infiltration of rainwater.
Example 2
Referring to fig. 6, the arrester body 1 used in the arrester of the oil-immersed transformer according to this embodiment may be specifically split, that is, the arrester body 1 itself further includes a splicing flange 5 for splicing the upper plug block and the base together, so that the arrester flange 2 described in embodiment 1 is actually a base flange of the arrester, and the split structure of the split flange may be referred to, for example, CN208767140U in the prior art provided in the background art, and will not be described in detail.
As can be seen from fig. 6, the arrester mounting structure of the present embodiment differs from that of embodiment 1 mainly in that the bolts pass through the splice flange 5 before being inserted into the arrester flange 2.
Other matching structures between the lightning arrester body 1 and the oil-immersed transformer in the above embodiments of the present invention are common knowledge, and for example, refer to the prior art of CN208767140U, and detailed description thereof is omitted.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a lightning arrester for oil-immersed transformer, its characterized in that, includes lightning arrester body (1), lightning arrester flange (2) and sealing element (3), lightning arrester flange (2) are fixed at lightning arrester body (1), and lightning arrester body (1) passes through lightning arrester flange (2) fixed mounting on oil tank (4), be provided with protruding plane (42) in oil tank top on oil tank (4) oil tank top horizontal plane (41) be provided with arc transition (43) between protruding plane (42) in oil tank top and oil tank top horizontal plane (41), lightning arrester flange (2) are including flat straight section (21) of flange and flange arc section (22), flat straight section (21) of flange and flange arc section (22) correspond the cooperation with protruding plane (42) in oil tank top and arc transition (43) respectively, sealing element (3) set up between flat section (21) of flange and the protruding plane (42) in oil tank top and flange arc section (22) and arc transition (43).
2. A surge arrester for oil filled transformers according to claim 1, characterized in that the sealing element (3) is a flat mat seal.
3. A surge arrester for oil filled transformers according to claim 1, characterized in that the sealing element (3) comprises a sealing straight section (31) and a sealing arc section (32), which sealing straight section (31) and sealing arc section (32) are adapted to the mounting gap between the lower surface of the surge arrester flange (2) and the oil tank (4), respectively.
4. A surge arrester for oil filled transformers according to claim 3, characterized in that the sealing element (3) is centrally provided with a large sealing mounting hole (34), through which large sealing mounting hole (34) the surge arrester body (1) passes.
5. An arrester for oil filled transformers according to claim 1 characterized in that the arrester flange (2) is fixed to the tank (4) by bolting.
6. A lightning arrester according to claim 5, characterized in that a threaded hole (44) is provided on the oil tank (4), a flange bolt mounting hole (23) and a sealing bolt mounting hole (33) are provided on the lightning arrester flange (2) and the sealing element (3), respectively, and a bolt is threaded into the threaded hole (44) after passing through the flange bolt mounting hole (23) and the sealing bolt mounting hole (33).
7. A surge arrester for an oil immersed transformer according to claim 6, characterized in that the tank top convex plane (42) is provided with a tank part mounting large hole (45), and the surge arrester body (1) passes through the tank part mounting large hole (45).
8. An arrester according to claim 1, characterized in that the arrester body (1) is a split type, and the arrester flange (2) is an arrester base flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222545845.1U CN218241552U (en) | 2022-09-26 | 2022-09-26 | Lightning arrester for oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222545845.1U CN218241552U (en) | 2022-09-26 | 2022-09-26 | Lightning arrester for oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218241552U true CN218241552U (en) | 2023-01-06 |
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ID=84666720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222545845.1U Active CN218241552U (en) | 2022-09-26 | 2022-09-26 | Lightning arrester for oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218241552U (en) |
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2022
- 2022-09-26 CN CN202222545845.1U patent/CN218241552U/en active Active
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