CN209929111U - Protection device for high-voltage bushing of transformer - Google Patents

Abstract

The utility model discloses a protection device for a high-voltage bushing of a transformer, which comprises a high-voltage bushing, a conductive column is sleeved inside a hollow insulating cylinder, a heat dissipation cavity is arranged outside the conductive column, a heat conducting fin is uniformly arranged inside the heat dissipation cavity, an upper end cover is arranged at the top end of the high-voltage bushing, a moisture-proof cavity is arranged inside the upper end cover, and a lower end cover is arranged at the bottom end of the high-voltage bushing, the utility model has the advantages of scientific and reasonable structure, safe and convenient use, heat dissipation cavity and heat conducting plate, improved heat conduction efficiency of the conductive column, improved heat dissipation performance inside the high-voltage bushing, realized heat dissipation protection of the high-voltage bushing, lower end cover, improved firmness when the high-voltage bushing is installed, and convenient disassembly and maintenance of the high-voltage bushing are realized, the moisture-proof cavity, the sealing performance and the moisture resistance inside the upper end cover of the high-voltage bushing are improved.

Description

Protection device for high-voltage bushing of transformer

Technical Field

The utility model relates to a protection device technical field specifically is a protection device for transformer high-tension bushing.

Background

The transformer bushing is a main insulation device outside a transformer box, an outgoing line of a transformer winding must penetrate through the insulation bushing, the outgoing line and a transformer shell are insulated, and the function of fixing the outgoing line is achieved.

Disclosure of Invention

The utility model provides a protection device for transformer high-voltage bushing, it has to lead electrical pillar and can produce a large amount of heats at the during operation to effectively solve to provide current transformer high-voltage bushing when using in above-mentioned background art, because high-voltage bushing's inside heat dispersion is relatively poor, lead to transformer high-voltage bushing to take place to damage easily, fastness when can not having realized high-voltage bushing's heat dissipation protection and high-voltage bushing installation is relatively poor, be not convenient for dismantle the problem of maintaining high-voltage bushing.

In order to achieve the above object, the utility model provides a following technical scheme: a protection device for transformer high-voltage bushing, including high-voltage bushing, the upper end cover is installed on the high-voltage bushing top, the inside embedding of high-voltage bushing has conductive pillar, binding post is installed on conductive capital end, the lower end cover is installed to the high-voltage bushing bottom, the connecting wire pipe has been cup jointed to the high-voltage bushing bottom, the hollow insulating cylinder has been cup jointed to high-voltage bushing inside, it has seted up the heat dissipation cavity to lead between conductive pillar and the hollow insulating cylinder, the draw-in groove has all been seted up to hollow insulating cylinder inner wall both sides, the inside embedding of draw-in groove has the heat-conducting plate, insulating aluminum oxide sheet is all installed to the heat-conducting plate both sides, the inside air vent of evenly having seted up of heat-conducting plate, solid fixed ring is installed to.

Preferably, the silica gel full skirt has evenly been cup jointed to the high-tension bushing outside, and the guiding gutter has evenly been seted up on silica gel full skirt surface.

Preferably, the heat dissipation chamber is filled with dry insulating nitrogen gas.

Preferably, the inside top of upper end cover has cup jointed the rubber gasbag, the baffle is all installed to rubber gasbag bottom both sides, set up dampproofing cavity between baffle and the rubber gasbag, dampproofing cavity internally mounted has the silica gel granule.

Preferably, a wire rubber sleeve is sleeved at an opening at the bottom end of the wiring tube.

Preferably, the shape of the insulating alumina sheet is arc, and the outer diameter of the insulating alumina sheet is equal to the inner diameter of the clamping groove.

Preferably, the upper end cover is fixedly connected with the top end of the high-voltage bushing through threads.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of being scientific and reasonable in structure, convenience safe in utilization:

1. be provided with the heat dissipation cavity, insulating aluminum oxide sheet, heat-conducting plate and air vent, through the inside insulating aluminum oxide sheet of hollow insulating cylinder and the direct contact who leads electrical pillar, the area of contact of heat conduction has been increased, the circulation of air vent at the heat dissipation cavity that the insulating dry nitrogen gas of cooperation passes through the heat-conducting plate is inside simultaneously, the efficiency of leading electrical pillar heat conduction has been improved, thereby the inside heat dispersion of high-voltage bushing has been improved by a wide margin, the stability and the reliability of high-voltage bushing operation when long-term operation have been guaranteed, the heat dissipation protection to high-voltage bushing has been realized.

2. Be provided with the lower end cover, gu fixed ring, rubber gasket and wire gum cover, lock between lower end cover and the fixed ring through fastening screw, be connected high-voltage bushing and transformer fixedly, fastness when having improved the high-voltage bushing installation to be convenient for dismantle and maintain high-voltage bushing, the wire gum cover through the connecting wire tube opening part carries out contact protection to high-voltage wire simultaneously, reduces the wearing and tearing that high-voltage wire surface received.

3. Be provided with rubber gasbag, dampproofing cavity and baffle, through the shutoff of rubber gasbag to the upper end cover top to the inside silica gel granule of the dampproofing cavity of cooperation baffle department can absorb the inside moisture that gets into the upper end cover, thereby has improved inside sealing performance and the humidity resistance of high-voltage bushing upper end cover.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the hollow insulating cylinder of the present invention;

fig. 3 is a schematic structural view of the lower end cap of the present invention;

fig. 4 is a schematic structural diagram of the upper end cap of the present invention.

Reference numbers in the figures: 1. a high voltage bushing; 2. an upper end cover; 3. a conductive post; 4. a wiring terminal; 5. a silica gel umbrella skirt; 6. a lower end cover; 7. a wire connecting pipe; 8. a hollow insulating cylinder; 9. a heat dissipation chamber; 10. a card slot; 11. a heat conducting plate; 12. insulating an aluminum oxide sheet; 13. a vent hole; 14. a fixing ring; 15. a rubber gasket; 16. fastening a screw rod; 17. a lead rubber sleeve; 18. a rubber air bag; 19. a partition plate; 20. a moisture-proof chamber; 21. silica gel granules.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in FIGS. 1-4, the utility model provides a technical solution, a protection device for a high-voltage bushing of a transformer, comprising a high-voltage bushing 1, rainwater can be guided and discharged through a diversion trench inside a silica gel umbrella skirt 5, so as to prevent rainwater from dripping to the bottom end of the high-voltage bushing 1 and leaking into the high-voltage bushing 1 to cause short circuit damage of the high-voltage bushing 1, the silica gel umbrella skirt 5 is uniformly sleeved outside the high-voltage bushing 1, the surface of the silica gel umbrella skirt 5 is uniformly provided with the diversion trench, an upper end cap 2 is installed at the top end of the high-voltage bushing 1, in order to disassemble the upper end cap 2 from the top end of the high-voltage bushing 1, silica gel particles 21 inside the upper end cap 2 can be conveniently taken out and replaced, the upper end cap 2 is fixedly connected with the top end of the high-voltage bushing 1 through screw threads, a conductive column 3 is embedded inside, the bottom of the high-voltage bushing 1 is sleeved with the wiring tube 7, the high-voltage wire inside the wiring tube 7 can be supported and protected through the wire rubber sleeve 17, abrasion of the high-voltage wire on the opening of the wiring tube 7 is reduced, and the wire rubber sleeve 17 is sleeved on the opening of the bottom end of the wiring tube 7.

The high-voltage bushing 1 is internally sleeved with a hollow insulating cylinder 8, a heat dissipation cavity 9 is arranged between the conductive column 3 and the hollow insulating cylinder 8, the heat dissipation cavity 9 is accelerated by the circulation of nitrogen in the heat dissipation cavity 9, the insulation performance in the hollow insulating cylinder 8 is ensured at the same time, the use safety of the device is improved, the heat dissipation cavity 9 is filled with dry insulation nitrogen, the two sides of the inner wall of the hollow insulating cylinder 8 are respectively provided with a clamping groove 10, a heat conducting plate 11 is embedded in the clamping groove 10, the two sides of the heat conducting plate 11 are respectively provided with an insulation aluminum oxide sheet 12, in order to increase the tightness and firmness of the connection between the insulation aluminum oxide sheet 12 and the clamping groove 10, the heat conducting plate 11 is prevented from falling off, the insulation aluminum oxide sheet 12 is arc-shaped, the outer diameter of the insulation aluminum oxide sheet 12 is equal to the inner diameter of, the bottom end of the lower end cover 6 is provided with a fixing ring 14, one side of the outer wall of the fixing ring 14 is pasted with a rubber gasket 15, and the lower end cover 6 is fixedly connected with the fixing ring 14 through a fastening screw 16.

The inside top of upper end cover 2 has cup jointed rubber gasbag 18, and baffle 19 is all installed to rubber gasbag 18 bottom both sides, has seted up dampproofing cavity 20 between baffle 19 and the rubber gasbag 18, and dampproofing cavity 20 internally mounted has silica gel granule 21.

The utility model discloses a theory of operation and use flow: in the process of using the protection device for the high-voltage bushing of the transformer, firstly, the fastening screw rod 16 is used for locking the lower end cover 6 and the fixing ring 14, the high-voltage bushing 1 and the transformer are connected and fixed, the firmness of the high-voltage bushing 1 in installation is improved, the high-voltage bushing 1 is convenient to disassemble and maintain, the joint of the lower end cover 6 and the transformer is sealed by the rubber gasket 15, and meanwhile, the high-voltage lead is in contact protection through the lead rubber sleeve 17 at the opening of the wiring tube 7, so that the abrasion on the surface of the high-voltage lead is reduced;

then, a large amount of heat is generated when the conductive column 3 works, the contact area of heat conduction is increased by the direct contact of the insulating aluminum oxide sheet 12 inside the hollow insulating cylinder 8 and the conductive column 3, and meanwhile, the heat conduction efficiency of the conductive column 3 is improved by the cooperation of the circulation of insulating dry nitrogen in the heat dissipation chamber 9 through the vent hole 13 inside the heat conducting plate 11, so that the heat dissipation performance inside the high-voltage bushing 1 is greatly improved, the stability and the reliability of the operation of the high-voltage bushing 1 in long-term work are ensured, and the heat dissipation protection of the high-voltage bushing 1 is realized;

finally, fix insulating aluminum oxide sheet 12 both sides through draw-in groove 10, avoid heat-conducting plate 11 to take place to drop, through the shutoff on 2 tops of rubber gasbag 18 upper end cover, and cooperate the inside silica gel granule 21 of dampproofing cavity 20 of 19 departments of baffle can absorb the moisture that gets into 2 insides of upper end cover, thereby improved 1 inside sealing performance and the humidity resistance of upper end cover 2 of high-voltage bushing, and can guide the rainwater through silica gel full skirt 5 and discharge, avoid rainwater drippage to 1 bottom of high-voltage bushing, the seepage is inside to high-voltage bushing 1, cause high-voltage bushing 1's short circuit damage.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. Protection device for a high-voltage bushing of a transformer, comprising a high-voltage bushing (1), characterized in that: the high-voltage bushing is characterized in that a silica gel umbrella skirt (5) is uniformly sleeved outside the high-voltage bushing (1), flow guide grooves are uniformly formed in the surface of the silica gel umbrella skirt (5), an upper end cover (2) is installed at the top end of the high-voltage bushing (1), the upper end cover (2) is fixedly connected with the top end of the high-voltage bushing (1) through threads, a rubber air bag (18) is sleeved at the top end of the interior of the upper end cover (2), partition plates (19) are installed on two sides of the bottom end of the rubber air bag (18), a moisture-proof cavity (20) is formed between each partition plate (19) and the corresponding rubber air bag (18), and silica gel particles;

a conductive column (3) is embedded in the high-voltage sleeve (1), a wiring terminal (4) is installed at the top end of the conductive column (3), a lower end cover (6) is installed at the bottom end of the high-voltage sleeve (1), a wiring pipe (7) is sleeved at the bottom end of the high-voltage sleeve (1), and a wire rubber sleeve (17) is sleeved at an opening at the bottom end of the wiring pipe (7);

a hollow insulating cylinder (8) is sleeved inside the high-voltage sleeve (1), a heat dissipation cavity (9) is arranged between the conductive column (3) and the hollow insulating cylinder (8), the heat dissipation chamber (9) is filled with dry insulating nitrogen, the two sides of the inner wall of the hollow insulating cylinder (8) are both provided with clamping grooves (10), a heat conducting plate (11) is embedded in the clamping groove (10), insulating aluminum oxide sheets (12) are respectively arranged on two sides of the heat conducting plate (11), the insulating aluminum oxide sheets (12) are arc-shaped, the outer diameter of the insulated alumina sheet (12) is equal to the inner diameter of the clamping groove (10), vent holes (13) are uniformly formed in the heat conducting plate (11), a fixing ring (14) is arranged at the bottom end of the lower end cover (6), the rubber gasket (15) is attached to one side of the outer wall of the fixing ring (14), and the lower end cover (6) is fixedly connected with the fixing ring (14) through a fastening screw (16).

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