CN103413659A - Combined type 1-KV level transformer bushing - Google Patents
Combined type 1-KV level transformer bushing Download PDFInfo
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- CN103413659A CN103413659A CN201310393818XA CN201310393818A CN103413659A CN 103413659 A CN103413659 A CN 103413659A CN 201310393818X A CN201310393818X A CN 201310393818XA CN 201310393818 A CN201310393818 A CN 201310393818A CN 103413659 A CN103413659 A CN 103413659A
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Abstract
The invention discloses a combined type 1-KV level transformer bushing, and belongs to the technical field of transformer bushings. The combined type 1-KV level transformer bushing comprises a conductive rod, a nut, a porcelain bushing, a sealing flat gasket, a metal gland, a wedge-shaped sealing leather ball and a base, wherein an external thread is formed at one end of the conductive rod, and a flat wiring terminal is arranged at the other end of the conductive rod; the base is an insulation casting body and is combined with one end, which is close to the flat wiring terminal, of the conductive rod to form an integrated structure; the sealing flat gasket, the porcelain bushing, the wedge-shaped sealing leather ball and the metal gland are sequentially sleeved on the conductive rod; the nut is matched with the external thread on the conductive rod and is arranged at the upper end of the metal gland. The combined type 1-KV level transformer bushing is simple in structure, convenient to mount and high in sealing property; the number of constituent accessories of the bushing is small; therefore the manufacturing cost is greatly reduced.
Description
Technical field
The present invention relates to a kind of bushing shell for transformer, more particularly, relate to a kind of composite type 1KV level bushing shell for transformer.
Background technology
The Main Function of bushing shell for transformer is that the inner high-low voltage leads of transformer is guided to the fuel tank outside, not only conduct lead-in wire insulation against ground, but also the effect of undertaking anchor leg, at Transformer, long-term by load current, when being short-circuited, the transformer outside passes through short circuit current.The composite type 1KV level sleeve pipe of using on market now, all adopting three porcelain pieces to add conducting rod forms, as shown in Figure 2, it mainly comprises conducting rod (1), nut (2), porcelain gland (9), circular seal skin pearl (10), upper insulator (11), sealing plain washer (6), upper cardboard (12), lower insulator (13), lower cardboard (14) and location-plate (15), there is the problem that sealing surface is little in circular seal skin pearl (10), oil leakage phenomenon easily occurs; Location-plate (15) must be set on conducting rod (1), increase production cost; Conducting rod (1) is with the connected mode gone between for being threaded, and lug plate need to be made the C character form structure while being connected, the manufacturing process complexity with conducting rod (1); Adopt porcelain gland (9), upper insulator (11) and lower insulator (13) to insulate, although insulation effect is good, this compound mode part is many, has increased on the one hand installation difficulty, and it is very long that one side conducting rod (1) need to be done, and increased manufacturing cost.Therefore urgently technological improvement and update of existing composite type 1KV level sleeve pipe.
Through patent retrieval, have for bushing shell for transformer and carry out improved technical scheme openly, as China Patent No. ZL00208668.9, Granted publication day is January 31 calendar year 2001, invention and created name is: Simple type transformer sleeve, this application case relates to a kind of Simple type transformer sleeve, its technical essential is that insulator forms with the moulding plastics compacting, each seals position and all takes axial wedge-type seal circle or combined special-shaped sealing ring, reach sealing effectiveness, sealing ring all is in air-tight state, in air without exposed.This application case has solved the bad problem of bushing shell for transformer sealing to a certain extent, but its weak point is: on the conducting rod of this application case, need to arrange in advance lead-in wire, not only to installation, bring very large inconvenience, and the manufacturing cost of bushing shell for transformer is also relatively higher; In addition, the bushing shell for transformer of this application case and transformer box cover adopt securing member to fix, and the sealing effectiveness of bearing is unsatisfactory, is prone to oil leakage phenomenon.
China Patent No. ZL201020532930.9 and for example, Granted publication day is on March 23rd, 2011, invention and created name is: poured with epoxy resin primary conductive bar, this application case relates to a kind of poured with epoxy resin primary conductive bar, be installed on the current transformer oil conservator, comprise current-carrying part and insulated part, described current-carrying part one end is shaft-like, and the other end is flat binding post; Insulated part is epoxy resin poured body, insulated part and the current-carrying part structure that is combined into one; The middle part of current-carrying part is in conjunction with insulated part, and this position is provided with a plurality of grooves, and the surface of groove both sides projection is the reticulate pattern male and female face; The shaft-like end outside of current-carrying part is processed with external screw thread; The part outside between described current-carrying part and insulated part binding site and a shaft-like end is two flat horizontal surfaces.This application case has solved sealing and the wiring problem of conducting rod to a certain extent, but its weak point is: epoxy resin cured product is easily degraded chain rupture after solar radiation, after Exposure to Sunlight, easily tarnish out of doors, efflorescence gradually, during use, need effects on surface to carry out special surface treatment, and also fall short of its useful life, this is also the main cause that the epoxy resin sleeve pipe can not replace porcelain bushing fully.
Summary of the invention
1. invent the technical problem that will solve
The object of the invention is to overcome in prior art 1KV level bushing shell for transformer part many, installation difficulty is large, the deficiency that sealing effectiveness is undesirable and manufacturing cost is high, a kind of composite type 1KV level bushing shell for transformer is provided, adopt technical scheme provided by the invention, not only simple in structure, easy for installation, and the good airproof performance of sleeve pipe, the component part of sleeve pipe is few simultaneously, thereby greatly reduces manufacturing cost.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of composite type 1KV level bushing shell for transformer of the present invention, comprise conducting rod, nut, insulator and sealing plain washer, also comprise metal backup shoe, wedge-type seal skin pearl and base, one end of described conducting rod is with external screw thread, the other end is the flat wire head, described base is the insulation pouring body, and base and conducting rod are near an end of the flat wire head structure that is combined into one, described sealing plain washer, insulator, wedge-type seal skin pearl and metal backup shoe are sheathed on conducting rod successively, described nut matches with the external screw thread on conducting rod, and be located at the upper end of metal backup shoe.
As a further improvement on the present invention, on described insulator, be provided with the conical surface and umbrella shape face, described wedge-type seal skin pearl is arranged in the conical surface, and the lozenges on wedge-type seal skin pearl coordinates with conical surface seal, described umbrella shape face is arranged at the upper end of insulator, the lower end of described insulator is provided with boss, matches with the inner ring of sealing plain washer in the outer ring of described boss.
As a further improvement on the present invention, described metal backup shoe comprises inner concave and outer convex surface, and the bottom of described inner concave is plane, and the top of described outer convex surface is plane.
As a further improvement on the present invention, on described flat wire head, be provided with wiring hole.
As a further improvement on the present invention, on the loading end of described base, be provided with oil groove.
As a further improvement on the present invention, the material of described base is PA.
As a further improvement on the present invention, described bushing shell for transformer is installed on transformer tank and covers, and described case lid is between sealing plain washer and base, and described sealing plain washer and case lid are sealed and matched.
3. beneficial effect
Adopt technical scheme provided by the invention, compare with existing known technology, have following remarkable result:
(1) a kind of composite type 1KV level bushing shell for transformer of the present invention, an end of its conducting rod is with external screw thread, and the other end is the flat wire head, is provided with wiring hole on the flat wire head, improved the reliability connected, and fitting operation is convenient;
(2) a kind of composite type 1KV level bushing shell for transformer of the present invention, its base is the insulation pouring body, and base and conducting rod are near an end of the flat wire head structure that is combined into one, replaced the lower insulator of traditional sleeve, simplified the structure of traditional transformer sleeve pipe, shorten the length of conducting rod, reduced the number of part, reduced the processing and manufacturing cost of bushing shell for transformer;
(3) a kind of composite type 1KV level bushing shell for transformer of the present invention, its sealing plain washer, insulator, wedge-type seal skin pearl and metal backup shoe are sheathed on conducting rod successively, nut matches with the external screw thread on conducting rod, and be located at the upper end of metal backup shoe, by adjusting nut, realize the compression of metal backup shoe to wedge-type seal skin pearl, compact conformation, simple to operate, and good seal performance;
(4) a kind of composite type 1KV level bushing shell for transformer of the present invention, on its insulator, be provided with the conical surface and umbrella shape face, pearl is arranged in the conical surface wedge-type seal skin, and the lozenges on wedge-type seal skin pearl coordinates with conical surface seal, and the umbrella shape face is arranged at the upper end of insulator, and the lower end of insulator is provided with boss, match with the inner ring of sealing plain washer in the outer ring of boss, by lozenges and cone match, enlarge active surface, thus improve sealing property; The umbrella shape face be designed with the quick outflow that is beneficial to rainwater, avoid rainwater to impact the performance of bushing shell for transformer; Being designed with of boss is beneficial to the location that seals plain washer, guarantees that installation is reliable and sealing is good;
(5) a kind of composite type 1KV level bushing shell for transformer of the present invention, its metal backup shoe comprises inner concave and outer convex surface, the bottom of inner concave is plane, the top of outer convex surface is plane, can effectively wedge-type seal skin pearl be pressed in insulator, avoid the aging problem that causes the sealing effectiveness variation because of wedge-type seal skin pearl;
(6) a kind of composite type 1KV level bushing shell for transformer of the present invention, be provided with oil groove on the loading end of its base, guarantees that bushing shell for transformer can oil-feed, reaches insulation effect better.
The accompanying drawing explanation
Fig. 1 is the structural representation of a kind of composite type 1KV level bushing shell for transformer of the present invention;
Fig. 2 is the structural representation of composite type 1KV level bushing shell for transformer in prior art;
Fig. 3 is the structural representation of insulator in the present invention;
Fig. 4 is that in the present invention, base is cast in the structural representation on conducting rod;
Fig. 5 is the structural representation of metal backup shoe in the present invention;
Fig. 6 is the structural representation of wedge-type seal skin pearl in the present invention.
Label declaration in schematic diagram:
1, conducting rod; 101, flat wire head; 102, wiring hole; 2, nut; 3, metal backup shoe; 301, inner concave; 302, outer convex surface; 4, wedge-type seal skin pearl; 401, lozenges; 5, insulator; 501, the conical surface; 502, umbrella shape face; 503, boss; 6, sealing plain washer; 7, case lid; 8, base; 801, oil groove; 9, porcelain gland; 10, circular seal skin pearl; 11, upper insulator; 12, upper cardboard; 13, lower insulator; 14, lower cardboard; 15, location-plate.
Embodiment
For further understanding content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment
In conjunction with Fig. 1, a kind of composite type 1KV level bushing shell for transformer of the present embodiment, comprise conducting rod 1, nut 2, metal backup shoe 3, wedge-type seal skin pearl 4, insulator 5, sealing plain washer 6 and base 8, one end of conducting rod 1 is with external screw thread, for nut wire in mating connection, the other end is flat wire 101, on flat wire 101, be provided with wiring hole 102, flat wire 101 is positioned at transformer, has improved the connection reliability in transformer, and fitting operation is convenient.As shown in Figure 4, base 8 is the insulation pouring body, and base 8 and conducting rod 1 are near an end of flat wire 101 structure that is combined into one, base 8 comprises bearing part and coupling part, bearing part is mutually vertical with coupling part, bearing part is for support bushing 5, sealing plain washer 6 parts such as grade, coupling part is for being connected with conducting rod 1, and coupling part extends to insulator 5 inside always, location for insulator 5, this design has replaced the lower insulator 13 of traditional sleeve, simplified the structure of traditional transformer sleeve pipe, shortened the length of conducting rod 1, reduced the number of part, reduced the processing and manufacturing cost of bushing shell for transformer.On the loading end of the bearing part of the base 8 in the present embodiment, be provided with oil groove 801, this oil groove 801 is provided with two, and is symmetrical arranged, and guarantees that bushing shell for transformer can oil-feed, reaches insulation effect better; The material of base 8 is the PA(formal name used at school: polyamide, be commonly called as nylon), PA is as the engineering plastics of large consumption, be widely used in the fields such as machinery, automobile, electrical equipment, aviation, metallurgy, has excellent electrical insulation capability, breakdown voltage resistant height, be good electric, electrical apparatus insulation material, and it also has good weatherability, thermal endurance and rub resistance.Sealing plain washer 6 in the present embodiment, insulator 5, wedge-type seal skin pearl 4 and metal backup shoe 3 are sheathed on conducting rod 1 successively, nut 2 matches with the external screw thread on conducting rod 1, and be located at the upper end of metal backup shoe 3, by adjusting nut 2, realize the compression of 3 pairs of wedge-type seal skin pearls 4 of metal backup shoe, compact conformation, simple to operate, and good seal performance.As shown in Figure 3 and Figure 6, on insulator 5, be provided with the conical surface 501 and umbrella shape face 502, wedge-type seal skin pearl 4 is arranged in the conical surface 501, and the lozenges on wedge-type seal skin pearl 4 401 is sealed and matched with the conical surface 501, by lozenges 401, coordinate with the conical surface 501, enlarge active surface, thus sealing property improved; Umbrella shape face 502 is arranged at the upper end of insulator 5, is conducive to the quick outflow of rainwater, avoids rainwater to impact the performance of bushing shell for transformer; The lower end of insulator 5 is provided with boss 503, and matching with the inner ring of sealing plain washer 6 in the outer ring of boss 503, is conducive to seal the location of plain washer 6, guarantees that installation is reliable and sealing is good.
As shown in Figure 5, metal backup shoe 3 in the present embodiment comprises inner concave 301 and outer convex surface 302, the bottom of inner concave 301 is plane, the top of outer convex surface 302 is plane, the base plane area of inner concave 301 is greater than the area of wedge-type seal skin pearl 4 afterbodys, and the top planes area of outer convex surface 302 is greater than the area of nut 2, can effectively wedge-type seal skin pearl 4 be pressed in insulator 5, avoid making wedge-type seal skin pearl 4 to be in for a long time in air and aging, cause the problem of sealing effectiveness variation.
A kind of composite type 1KV level bushing shell for transformer of the present embodiment is installed on transformer box cover 7, and case lid 7 is between sealing plain washer 6 and base 8, and sealing plain washer 6 is sealed and matched with case lid 7.During installation, the conducting rod 1 that at first will be cast with base 8 passes from the case lid 7 of transformer, and the flat wire of conducting rod 1 bottom 101 is connected with the high-low voltage leads in transformer; Then will seal successively plain washer 6, insulator 5, wedge-type seal skin pearl 4 and metal backup shoe 3 and be set on conducting rod 1, wedge-type seal skin pearl 4 is positioned at the conical surface 501 of insulator 5; Again nut 2 is installed on conducting rod 1, and is screwed to outer convex surface 302 touching positions with metal backup shoe 3, continue fastening nut 2, sleeve pipe is anchored on transformer box cover 7; Finally, by nut, with pad, conducting rod 1 is connected with outer lead.
A kind of composite type 1KV level bushing shell for transformer of the present invention, with traditional bushing shell for transformer, compare, the contraction in length of conducting rod 1 35%, porcelain gland 9 use metal backup shoes 3 are replaced, by lower insulator 13 use insulator foots 8 replacements, upper cardboard 12, lower cardboard 14 and location-plate 15 have been saved, circular seal skin pearl 10 is improved to wedge-type seal skin pearl 4, not only simple in structure, easy for installation, and the good airproof performance of sleeve pipe, the component part of sleeve pipe is few simultaneously, thereby greatly reduces manufacturing cost.What deserves to be explained is, a kind of composite type 1KV level bushing shell for transformer of the present invention, passed through the detection of department of State Grid, meets the instructions for use of bushing shell for transformer fully.
Below schematically the present invention and execution mode thereof are described, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that do not break away from the invention aim, without the creationary frame mode similar to this technical scheme and the embodiment of designing, all should belong to protection scope of the present invention.
Claims (7)
1. composite type 1KV level bushing shell for transformer, comprise conducting rod (1), nut (2), insulator (5) and sealing plain washer (6), it is characterized in that: also comprise metal backup shoe (3), wedge-type seal skin pearl (4) and base (8), one end of described conducting rod (1) is with external screw thread, the other end is flat wire head (101), described base (8) is the insulation pouring body, and base (8) and conducting rod (1) are near an end of flat wire head (101) structure that is combined into one, described sealing plain washer (6), insulator (5), wedge-type seal skin pearl (4) and metal backup shoe (3) are sheathed on conducting rod (1) successively, described nut (2) matches with the external screw thread on conducting rod (1), and be located at the upper end of metal backup shoe (3).
2. a kind of composite type 1KV level bushing shell for transformer according to claim 1, it is characterized in that: on described insulator (5), be provided with the conical surface (501) and umbrella shape face (502), described wedge-type seal skin pearl (4) is arranged in the conical surface (501), and the lozenges (401) on wedge-type seal skin pearl (4) is sealed and matched with the conical surface (501), described umbrella shape face (502) is arranged at the upper end of insulator (5), the lower end of described insulator (5) is provided with boss (503), match with the inner ring of sealing plain washer (6) in the outer ring of described boss (503).
3. a kind of composite type 1KV level bushing shell for transformer according to claim 1 and 2, it is characterized in that: described metal backup shoe (3) comprises inner concave (301) and outer convex surface (302), the bottom of described inner concave (301) is plane, and the top of described outer convex surface (302) is plane.
4. a kind of composite type 1KV level bushing shell for transformer according to claim 3, is characterized in that: on described flat wire head (101), be provided with wiring hole (102).
5. a kind of composite type 1KV level bushing shell for transformer according to claim 4, is characterized in that: on the loading end of described base (8), be provided with oil groove (801).
6. a kind of composite type 1KV level bushing shell for transformer according to claim 5, it is characterized in that: the material of described base (8) is PA.
7. a kind of composite type 1KV level bushing shell for transformer according to claim 6, it is characterized in that: described bushing shell for transformer is installed on transformer box cover (7), described case lid (7) is positioned between sealing plain washer (6) and base (8), and described sealing plain washer (6) is sealed and matched with case lid (7).
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| CN201310393818.XA CN103413659B (en) | 2013-09-02 | 2013-09-02 | A kind of combination type 1KV level bushing shell for transformer |
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| CN201310393818.XA CN103413659B (en) | 2013-09-02 | 2013-09-02 | A kind of combination type 1KV level bushing shell for transformer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733874A (en) * | 2014-12-18 | 2015-06-24 | 国网上海市电力公司 | Combined type insulation wiring pile head used for distribution transformer low voltage protection switch box |
| CN106229096A (en) * | 2016-08-31 | 2016-12-14 | 武汉海奥电气有限公司 | Many core insulations control sleeve pipe |
| CN106783093A (en) * | 2017-02-06 | 2017-05-31 | 苏州翰为电气科技有限公司 | A kind of oil-filled transformer is with hermetically sealed combined type 1kV grades of sleeve pipe |
| CN108806951A (en) * | 2018-07-18 | 2018-11-13 | 湖州新得意特种电磁线有限公司 | Transformer insulated device |
| CN109192475A (en) * | 2018-09-18 | 2019-01-11 | 国网冀北电力有限公司廊坊供电公司 | A kind of transformer secondary guide rod |
| CN110211769A (en) * | 2019-06-18 | 2019-09-06 | 四川智翔电器有限公司 | A kind of sulfur hexafluoride phase-shifting transformer |
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| CN201518265U (en) * | 2009-11-06 | 2010-06-30 | 熊会珍 | Novel anti-aging oil leakage prevention transformer casing pipe |
| CN201655511U (en) * | 2010-04-25 | 2010-11-24 | 熊会珍 | Novel anti-ageing and oil-seepage prevention low-voltage transformer bushing |
| CN201773681U (en) * | 2010-09-17 | 2011-03-23 | 大连北方互感器集团有限公司 | Epoxy resin poured once conducting bar |
| CN203444954U (en) * | 2013-09-02 | 2014-02-19 | 丹阳市金诺电器有限公司 | Combined type 1kV transformer bushing |
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| US5623125A (en) * | 1994-04-21 | 1997-04-22 | Pioch | Rod bushing for an electrical transformer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733874A (en) * | 2014-12-18 | 2015-06-24 | 国网上海市电力公司 | Combined type insulation wiring pile head used for distribution transformer low voltage protection switch box |
| CN106229096A (en) * | 2016-08-31 | 2016-12-14 | 武汉海奥电气有限公司 | Many core insulations control sleeve pipe |
| CN106783093A (en) * | 2017-02-06 | 2017-05-31 | 苏州翰为电气科技有限公司 | A kind of oil-filled transformer is with hermetically sealed combined type 1kV grades of sleeve pipe |
| CN108806951A (en) * | 2018-07-18 | 2018-11-13 | 湖州新得意特种电磁线有限公司 | Transformer insulated device |
| CN109192475A (en) * | 2018-09-18 | 2019-01-11 | 国网冀北电力有限公司廊坊供电公司 | A kind of transformer secondary guide rod |
| CN109192475B (en) * | 2018-09-18 | 2024-02-27 | 国网冀北电力有限公司廊坊供电公司 | Transformer secondary guide rod |
| CN110211769A (en) * | 2019-06-18 | 2019-09-06 | 四川智翔电器有限公司 | A kind of sulfur hexafluoride phase-shifting transformer |
| CN110211769B (en) * | 2019-06-18 | 2024-05-31 | 四川智翔电器有限公司 | Sulfur hexafluoride phase-shifting transformer |
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| CN103413659B (en) | 2016-08-17 |
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Effective date of registration: 20210422 Address after: No.18, Feiyue Road, industrial concentration zone, Shanghuang Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: Jiangsu Jinnuo Electric Technology Co.,Ltd. Address before: 212300, Jiangsu Province, Zhenjiang City, Danyang Province Lu Town West Fu Village Poplar bridge (Yang Xi No. 64) Patentee before: DANYANG CITY JINNUO ELECTRICAL APPLIANCE Co.,Ltd. |
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