CN101853753B - Oil-immersed fuse used for American-type box substation - Google Patents
Oil-immersed fuse used for American-type box substation Download PDFInfo
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- CN101853753B CN101853753B CN 200910048576 CN200910048576A CN101853753B CN 101853753 B CN101853753 B CN 101853753B CN 200910048576 CN200910048576 CN 200910048576 CN 200910048576 A CN200910048576 A CN 200910048576A CN 101853753 B CN101853753 B CN 101853753B
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Abstract
The invention discloses an oil-immersed fuse used for an American-type box substation, which comprises a cylindrical base, a fuse holder and a fuse element, wherein the base comprises an outer shell, and two conducting rings and a mounting base which are arranged in the outer shell at intervals; the fuse holder comprises a handle, and two contact pins connected with two ends of the fuse element respectively; one of the two contact pins is connected with the handle; the handle comprises a connecting rod, a cover and a knob which are connected with one another in turn; the two conducting rings and the mounting base are positioned on the head part, the middle part and the tail part of the base respectively; the outer shell of the base is formed by enwinding an epoxy glass fiber reinforced composite insulating material; and the two conducting rings and the mounting base are connected into a whole body. The oil-immersed fuse used for the American-type box substation adopts a closed cylindrical base to separate the fuse element from oil, and not only can meet sealing requirements of the oil-immersed fuse but also can increase the creepage distance, relative to the ground, of the fuse element.
Description
Technical field
The present invention relates to a kind of protection electrical equipment of electric power system, be specifically related to a kind of oil fuse for the American-type box change.
Background technology
Fuse divides by installation form, and plug-in type and oil immersion bus-type are arranged, by the installation environment medium have in the atmosphere, the transformer wet goods.General plug-in fuse is vertical the insertion, is installed in the atmosphere, and installation dimension requires large, causes the transformer overall dimensions large.Oil immersion bus-type fuse member need be changed trouble opening transformer-cabinet and extracting under the transformer oil condition and change, loss or reduction transformer oil insulating properties.Oil-filled transformer overload protection high-tension fuse is to be applicable to power transformer overload protection usefulness in the American-type box change, is very important electric elements during American-type box becomes.American-type box becomes combined transformer and requires used high-voltage and current-limitation fuse to be necessary for oil immersed type, can imbed underground.Therefore, fuse there is high requirement to oil seal.In long-term use procedure, fuse inside has not allowed oil to enter, otherwise when fuse moves, may blast and serious fire.
Fuse generally includes base 1, fuse member 2 and fusing carrier, as shown in Figure 1.Base 1 comprises shell 10 and two conducting rings 11,12 and one mounting base 13 that are disposed in the shell 10; Fusing carrier comprises operating grip 3 and two contact studs 4; The outer face of contact stud 4 is provided with contact spring 40; Base 1 is used for supporting fusing carrier 2 and fuse member, and with fuse member 2 and oil isolation.
Vertical plug-in type tubular fuse base of prior art, reach two conducting rings 11 between middle part conducting ring 12 and the mounting base 13, be respectively between 12 guide section and alternate guide section are installed, owing to guide section is installed and is connected the conducting ring 11 that the internal diameter of outer cover of guide section is connected with contact respectively, 12 internal diameter is consistent, install in the plug process at handle 3 and fuse member 2, contact spring 40 on the contact stud 4 is all larger with the compression stress of the installation guide section of base 1, the build-up of pressure friction, metal dust after base 1 inwall stays friction reduces even puncture fuse insulation property relatively.
Because to be generally an end enclosed for base 1, the seal degree of handle 3 and base 1 contact site directly determined fuse to the oil seal performance.At present, the sealing property problem of handle for fuse and base contact site never is well solved, and has this type of potential safety hazard in most fuse courses of work.The cross section of connecting rod 33 is cross in addition, though it can satisfy manipulation strength, therefore this structure exists the defective that can not elongate insulation distance so that fuse member creepage distance relatively only is limited as the length L of connecting rod.
Summary of the invention
The purpose of this invention is to provide a kind of oil fuse for the American-type box change, it can satisfy the seal request of oil fuse, can strengthen again fuse member creepage distance relatively.
A kind of technical scheme that realizes above-mentioned purpose is: a kind of oil fuse for the American-type box change, the cylinder base that comprises unidirectional opening, fusing carrier and fuse member, described base comprises shell and is arranged on the head of shell inner cavity and two conducting rings at middle part and are located at the mounting base of shell afterbody, described fusing carrier comprise handle and two respectively with fuse member two is connected and one is connected on the handle contact stud, described handle comprises the connecting rod that connects successively, lid and handle, wherein
It is Wrapping formed that the shell of described base strengthens composite insulating material by epoxy glass fiber, and described two conducting rings and a mounting base are connected as one;
For guide section is installed, be alternate guide section between described middle part conducting ring and the head conducting ring between described mounting base and the middle part conducting ring, the internal diameter of outer cover of described installation guide section and alternate guide section equates;
Described installation guide section shrinks until equate with the conducting ring internal diameter gradually near the internal diameter of outer cover of middle part conducting ring one end;
The position that described two conducting rings are connected with alternate guide section enlarges until equate with the internal diameter of outer cover of alternate guide section gradually towards the internal diameter of alternate guide section;
Described handle also comprises hermetically-sealed construction and sealing ring,
Described hermetically-sealed construction is located on the connecting rod and near an end of lid, and it is one section and radially extends the cylinder that forms by rod surface that the internal diameter of this cylindrical diameter and described base is complementary, and radially is provided with a groove on this cylindrical outer peripheral face;
Described sealing ring is embedded in the groove of described hermetically-sealed construction, and the ring wall of its outstanding this groove and the internal chamber wall of base are movably closely or seal and contact;
The connecting rod of described handle, fuse member and two contact studs are inserted in the inner chamber of described base, and two contact studs are contacted with the internal chamber wall of two conducting rings correspondingly, and make the cap seal of described handle get lodged in the mounting base afterbody of base.
The above-mentioned oil fuse that is used for the American-type box change, wherein, described installation guide section is to shrink until equate with the conducting ring internal diameter with the conical surface near the internal diameter of outer cover of conducting ring one end.
Above-mentioned be used for the oil fuse that American-type box becomes, wherein, the connecting rod cross section of described handle is rounded, on its outer peripheral face along its length the compartment of terrain radially be equipped with the multi-layer umbrella rib.
The above-mentioned oil fuse that is used for the American-type box change, wherein, the spacing distance of described multi-layer umbrella rib is identical, and the diameter of every layer of umbrella rib also equates.
The above-mentioned oil fuse that is used for the American-type box change wherein, it is characterized in that described handle is made by the unsaturated polyester glass fiber composite insulating material, and the handle of described handle, lid and connecting rod is one-body molded through evacuated die-casting process.
The above-mentioned oil fuse that is used for the American-type box change, wherein, the shell of described base is provided with two lug plates that are connected with two conducting rings respectively.
The technical scheme of the oil fuse that becomes for American-type box of the present invention, adopt vertical plug in construction and sealing tube-like base, fuse member is separated with oil, fuse member is installed with replacing and need not opened in the situation of transformer-cabinet, carry out convenient, fast, safety in the casing outside.Can satisfy the seal request of oil fuse.Enlarged again the internal diameter of inner two guide sections of base, made it greater than the internal diameter of conducting ring; Simultaneously, reducer between two guide sections and two conducting rings is gradual transition, reduced the compression stress of contact spring and base guide section, reduce friction, avoid the metal dust after base inner wall stays friction, ensured that also fuse insulation property relatively do not reduce when namely lowering handle installation contact engaging and separating force.Handle adopts the rounded connecting rod of cross section, and on its outer peripheral face along its length the interval equally be equipped with the multi-layer umbrella rib, both improved the mechanical tensile strength of handle, strengthened again fuse member creepage distance relatively; Increase hermetically-sealed construction and sealing ring at connecting rod again, can increase the sealing property of fuse, thereby have the dielectric strength that under the prerequisite that satisfies manipulation strength, performance, has improved the handle of fusing carrier.
Description of drawings
Fig. 1 is the structural representation of the oil fuse that becomes for American-type box of the present invention;
Fig. 2 is the structural representation of the oil fuse base that becomes for American-type box of the present invention;
Fig. 3 is the enlarged drawing of A among Fig. 2;
Fig. 4 is the structural representation of the oil fuse fuse member that becomes for American-type box of the present invention;
Fig. 5 is the structural representation of the oil fuse handle that becomes for American-type box of the present invention.
Embodiment
In order to understand technical scheme of the present invention better, also be described in detail by reference to the accompanying drawings below by specific embodiment:
See also Fig. 1 to Fig. 5, the oil fuse for the American-type box change of the present invention comprises cylinder base 1 and fuse member 2 and fusing carrier.
Shell 10 be provided with two respectively with two conducting rings 11,12 lug plates that are connected 14,15, be convenient to be connected with the external cable line.
Fusing carrier comprises handle 3 and two contact studs 4,4 ', wherein, handle 3 comprises handle 31, lid 32, connecting rod 33, hermetically-sealed construction 34 and sealing ring 35, wherein, hermetically-sealed construction 34 is located on the connecting rod 33 and an end of close lid 32, it is one section cylinder that is formed by the extension of connecting rod 33 radial surfaces, the internal diameter of this cylindrical diameter and base 1 is complementary, radially be provided with a groove 340 on this cylindrical outer peripheral face, sealing ring 35 is embedded in the groove 340 of hermetically-sealed construction 34, and the ring wall of its outstanding this groove 340 and the internal chamber wall of base 1 are movably closely or seal and contact.Handle 3 is made by the unsaturated polyester glass fiber composite insulating material, and shake hands 31, lid 32 and connecting rod 33 be one-body molded through evacuated die-casting process.
Two contact studs 4,4 ' respectively with connecting rod 33 heads that the erection column 25 at fuse member 2 two is connected and is connected to handle 3, two contact studs 4,4 ' outer face are equipped with contact spring 40,40 '.
The connecting rod 33 of operating grip 3, two contact studs 4,4 ' all are plugged in the inner chamber of base 1 with fuse member 2, two contact studs 4,4 ' are contacted with two conducting rings 11,12 internal chamber wall correspondingly, and the lid 32 that makes operating grip 3 is sealed on mounting base 13 afterbodys of base 1, and base 1 is separated fuse member 2 and outside transformer oil fully.When handle 3 inserted base 1 inner chamber of fuses, sealing ring 35 was embedded in the annular groove 340 on the hermetically-sealed construction 34, has positioning action, guarantees that handle 3 can not come off in the plug operating process is installed; Sealing ring 35 is by annular groove 340 inwalls on the hermetically-sealed construction 34 and the interference compression between fuse base 1 inwall, reach the effect of handle 3 and base 1 contact site seal isolation, significantly improve the sealing property of fuse, also can take the dielectric strength that improves relatively simultaneously.
An embodiment of the oil fuse that becomes for American-type box of the present invention installs guide section 123 and shrinks gradually until equate with the internal diameter of middle part conducting ring 12 near shell 10 internal diameters of middle part conducting ring 12 1 ends 123 '; Two conducting rings 11,12 positions 110 that are connected with alternate guide section 112,120 internal diameters towards alternate guide section 112 enlarge gradually until equate with the internal diameter of outer cover of alternate guide section 112.The base 1 of this structure improves the insulation property after fusing carrier and fuse member 2 installed effectively, avoid fuse member 2 relatively between insulation property reduce even puncture, improve fusing carrier and fuse member 2 is installed contact engaging and separating forces.When handle 3 and fuse member 2 inserted bases 1 inside, successively by guide section 123, middle part conducting ring 12, alternate guide section 112 and head conducting ring 11 are installed.Because the internal diameter of outer cover that guide section 123 and alternate guide section 112 be installed is greater than two conducting rings 12,11 internal diameter, internal diameter varies is progressive formation, can smooth transition, therefore, reduced contact spring 40,40 ' and the compression stress of base guide section, reduce friction, avoid the metal dust after base 1 inwall stays friction, ensured that also fuse insulation property relatively do not reduce when namely lowering handle 3 installation contact engaging and separating force.
Another embodiment of the oil fuse that becomes for American-type box of the present invention, connecting rod 33 cross sections of handle 3 are rounded, on its outer peripheral face along its length the compartment of terrain radially be equipped with multi-layer umbrella rib 310, the spacing distance H of this multi-layer umbrella rib 310 is identical, and the diameter D of every layer of umbrella rib 310 also equates.The handle 3 of this structure had both improved mechanical tensile strength, had strengthened again fuse member 2 creepage distance relatively, thereby had improved the dielectric strength of handle 3.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.
Claims (6)
1. one kind is used for the oil fuse that American-type box becomes, the cylinder base, fusing carrier and the fuse member that comprise unidirectional opening, described base comprises shell and is arranged on the head of shell inner cavity and two conducting rings at middle part and are located at the mounting base of shell afterbody, described fusing carrier comprise handle and two respectively with fuse member two is connected and one is connected on the handle contact stud, described handle comprises connecting rod, lid and the handle that connects successively, it is characterized in that
It is Wrapping formed that the shell of described base strengthens composite insulating material by epoxy glass fiber, and described two conducting rings and a mounting base are connected as one;
For guide section is installed, be alternate guide section between described middle part conducting ring and the head conducting ring between described mounting base and the middle part conducting ring, the internal diameter of outer cover of described installation guide section and alternate guide section equates;
Described installation guide section shrinks until equate with the conducting ring internal diameter gradually near the internal diameter of outer cover of middle part conducting ring one end;
The position that described two conducting rings are connected with alternate guide section enlarges until equate with the internal diameter of outer cover of alternate guide section gradually towards the internal diameter of alternate guide section;
Described handle also comprises hermetically-sealed construction and sealing ring,
Described hermetically-sealed construction is located on the connecting rod and near an end of lid, and it is one section and radially extends the cylinder that forms by rod surface that the internal diameter of this cylindrical diameter and described base is complementary, and radially is provided with a groove on this cylindrical outer peripheral face;
Described sealing ring is embedded in the groove of described hermetically-sealed construction, and the ring wall of its outstanding this groove and the internal chamber wall of base be close contact movably;
The connecting rod of described handle, fuse member and two contact studs are inserted in the inner chamber of described base, and two contact studs are contacted with the internal chamber wall of two conducting rings correspondingly, and make the cap seal of described handle get lodged in the mounting base afterbody of base.
2. the oil fuse for the American-type box change according to claim 1 is characterized in that, described installation guide section is to shrink until equate with the conducting ring internal diameter with the conical surface near the internal diameter of outer cover of conducting ring one end.
3. the oil fuse that becomes for American-type box according to claim 1 is characterized in that the connecting rod cross section of described handle is rounded, on its outer peripheral face along its length the compartment of terrain radially be equipped with the multi-layer umbrella rib.
4. the oil fuse for the American-type box change according to claim 3 is characterized in that the spacing distance of described multi-layer umbrella rib is identical, and the diameter of every layer of umbrella rib also equates.
5. the oil fuse for the American-type box change according to claim 1 it is characterized in that described handle is made by the unsaturated polyester glass fiber composite insulating material, and the handle of described handle, lid and connecting rod is one-body molded through evacuated die-casting process.
6. the oil fuse for the American-type box change according to claim 1 is characterized in that the shell of described base is provided with two lug plates that are connected with two conducting rings respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910048576 CN101853753B (en) | 2009-03-31 | 2009-03-31 | Oil-immersed fuse used for American-type box substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910048576 CN101853753B (en) | 2009-03-31 | 2009-03-31 | Oil-immersed fuse used for American-type box substation |
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| Publication Number | Publication Date |
|---|---|
| CN101853753A CN101853753A (en) | 2010-10-06 |
| CN101853753B true CN101853753B (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910048576 Active CN101853753B (en) | 2009-03-31 | 2009-03-31 | Oil-immersed fuse used for American-type box substation |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474306B (en) * | 2013-09-18 | 2015-10-21 | 上海电器陶瓷厂有限公司 | A kind of oil-immersed and high-voltage fuse |
| CN104465259B (en) * | 2014-12-22 | 2017-01-04 | 上海电器陶瓷厂有限公司 | A kind of shielding construction of oil-immersed fuse pedestal |
| CN105609391B (en) * | 2015-12-29 | 2017-08-08 | 上海电器陶瓷厂有限公司 | A kind of sealing drum base type fuse with release of pressure function |
| CN105428180B (en) * | 2015-12-29 | 2018-05-08 | 上海电器陶瓷厂有限公司 | A kind of pressure release mechanism of sealing drum base type fuse |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6624736B1 (en) * | 2000-05-19 | 2003-09-23 | Abb Inc. | Fuse housing with rate release control plug |
| CN2593348Y (en) * | 2003-01-10 | 2003-12-17 | 上海电器陶瓷厂 | Bured oil-immersed high-voltage current-limiting fuse |
| JP2005197182A (en) * | 2004-01-09 | 2005-07-21 | Mitsubishi Electric Corp | Insulating support structure of fuse |
-
2009
- 2009-03-31 CN CN 200910048576 patent/CN101853753B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6624736B1 (en) * | 2000-05-19 | 2003-09-23 | Abb Inc. | Fuse housing with rate release control plug |
| CN2593348Y (en) * | 2003-01-10 | 2003-12-17 | 上海电器陶瓷厂 | Bured oil-immersed high-voltage current-limiting fuse |
| JP2005197182A (en) * | 2004-01-09 | 2005-07-21 | Mitsubishi Electric Corp | Insulating support structure of fuse |
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| Publication number | Publication date |
|---|---|
| CN101853753A (en) | 2010-10-06 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Owner name: STATE GRID SHANGHAI ELECTRIC POWER COMPANY Effective date: 20141115 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20141115 Address after: 200071 Shanghai city Zhabei District Qingyun Road No. 517 Patentee after: Shanghai Electric Ceramic Works Co., Ltd. Patentee after: State Grid Shanghai Municipal Electric Power Company Address before: 200071 Shanghai city Zhabei District Qingyun Road No. 517 Patentee before: Shanghai Electric Ceramic Works Co., Ltd. |