CN217655748U

CN217655748U - Oil-resistant dry-type high-voltage bushing

Info

Publication number: CN217655748U
Application number: CN202221314409.7U
Authority: CN
Inventors: 张生斌; 张祥云; 柴红强
Original assignee: Henan Anda High Voltage Electric Co ltd
Current assignee: Henan Anda High Voltage Electric Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-10-25
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses an oil-resistant dry-type high-voltage bushing, the drill collar comprises a sleeve body, the sleeve pipe body is including the bar copper that runs through the center, the peripheral cladding of bar copper has the electric capacity core, the periphery of electric capacity core is around being equipped with the insulating layer, and the insulating layer includes the epoxy layer, be connected with the flange on the sleeve pipe body, be equipped with the wiring end on the flange, the upper surface of flange is connected with the pressure disk, the lower surface of flange is connected with sealed pad two, the upper surface of pressure disk is connected with sealed pad one, all set up the through-hole with bolt looks adaptation on pressure disk, flange, the sealed pad two, the bar copper runs through insulating layer top position and is equipped with sealed pad three, the periphery on epoxy layer is equipped with the explosion-proof layer, the periphery on explosion-proof layer is equipped with fire-retardant layer. The oil-resistant dry-type high-voltage bushing is mechanically sealed by the conical sealing ring, and has the advantages of good sealing effect, high flame-retardant and fireproof performance and high safety.

Description

Oil-resistant dry-type high-voltage bushing

Technical Field

The utility model belongs to the technical field of dry-type high-voltage bushing, especially, relate to a dry-type high-voltage bushing of oil-resistant type.

Background

The transformer bushing is a main insulation device outside the transformer box, and the outgoing lines of the transformer winding must penetrate through the insulation bushing, so that insulation is realized among the outgoing lines and between the outgoing lines and the transformer shell, and the transformer bushing plays a role in fixing the outgoing lines. The appearance structure of the epoxy resin impregnated paper type oil-resistant transformer bushing mainly comprises a wiring terminal, an upper ceramic part, a lower ceramic part, a flange, a grading ring and a lead copper pipe. The upper and lower porcelain pieces play an insulating role and protect the inner insulation from atmospheric erosion. The flange is used for connecting the upper porcelain bushing and the lower porcelain bushing and is used for stably fixing the porcelain bushings on the transformer, the flange can also be provided with a small grounding sleeve, and the capacitance and dielectric loss on the capacitive screen can be detected during operation grounding maintenance.

The existing oil-resistant dry-type high-voltage bushing is easy to have the problem of poor sealing, for example, the internal water seepage of the transformer occurs because the sealing at the joint of the upper flange of the bushing and the transformer is poor; the sealing of the copper tube outlet end at the top of the sleeve is not firm, and water directly enters the sleeve, so that flashover occurs on the inner wall of the porcelain sleeve or the surface of the capacitor core, and the sleeve explodes. Meanwhile, the sleeve has the problems of low flame retardance and fire resistance. Therefore, it is very important to design a sleeve with good sealing effect and high flame-retardant and fireproof performance.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides an oil-resistant dry-type high-voltage bushing.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an oil-resistant dry-type high-voltage bushing, includes the sleeve pipe body, the sleeve pipe body is including the bar copper that runs through the center, the peripheral cladding of bar copper has the electric capacity core, the periphery of electric capacity core is around being equipped with the insulating layer, and the insulating layer includes the epoxy layer, be connected with the flange on the sleeve pipe body, be equipped with the wiring end on the flange, the last surface connection of flange has the pressure disk, the lower surface connection of flange has sealed two, the last surface connection of pressure disk has sealed pad one, all set up the through-hole with bolt looks adaptation on pressure disk, flange, the sealed pad two, the bar copper runs through insulating layer top position and is equipped with sealed pad three, the periphery of epoxy layer is equipped with explosion-proof layer, the periphery on explosion-proof layer is equipped with fire-retardant layer.

Furthermore, the first sealing gasket and the third sealing gasket are both in a tapered column structure with a narrow top and a wide bottom, and the second sealing gasket is in a planar circular ring structure.

Furthermore, the diameter of the wide part of the first sealing gasket is larger than that of the flange, the diameter of the wide part of the third sealing gasket is 1.5-2 times that of the narrow part, and the diameter of the second sealing gasket is consistent with that of the flange.

Further, the thickness of the second sealing gasket is not less than 4mm.

Furthermore, the first sealing gasket, the second sealing gasket and the third sealing gasket are all made of acrylic ester.

Further, the explosion-proof layer is a carbon fiber layer.

Further, the flame-retardant layer is a mica flame-retardant layer.

Compared with the prior art, the beneficial effects of the utility model are that: the sealing gasket is used for sealing the contact surface between the two sleeve bodies and the transformer, so that the mechanical sealing is realized, and the sealing effect is good; the conical sealing gasket is arranged at the top of the pressure plate to perform secondary protection on the flanges, so that external water is prevented from permeating into the transformer through the flanges, the contact tightness between the sleeve body and the transformer is higher, the conical structure of the sealing gasket I is beneficial to outward water guiding and discharging, and the safety performance is high; the top of the insulating layer is hermetically connected with the contact part of the copper bar through a third sealing gasket, the mechanical sealing effect of the conical sealing ring is good, and water is not accumulated easily in the conical structure; the design of the flame-retardant layer explosion-proof layer makes the sleeve body have high fire resistance and high safety.

Drawings

Fig. 1 is a schematic view of the external structure of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic sectional view of the present invention.

In the figure: the capacitor comprises a sleeve body 1, a capacitor core 2, a copper rod 3, a flange 4, a wiring terminal 5, a pressure plate 6, a first sealing gasket 7, a second sealing gasket 8, a third sealing gasket 9, bolts 10, an epoxy resin layer 11, an explosion-proof layer 12 and a flame-retardant layer 13.

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 in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example (b):

referring to the attached drawings 1-3, an oil-resistant dry-type high-voltage bushing comprises a bushing body 1, the bushing body 1 comprises a copper rod 3 penetrating through the center, the periphery of the copper rod 3 is coated with a capacitor core 2, an insulating layer is arranged around the periphery of the capacitor core 2 and comprises an epoxy resin layer 11, a flange 4 is connected onto the bushing body 1, a wiring end 5 is arranged on the flange 4, the upper surface of the flange 4 is connected with a pressure plate 6, the lower surface of the flange 4 is connected with a sealing gasket II 8, the upper surface of the pressure plate 6 is connected with a sealing gasket I7, through holes matched with bolts 10 are formed in the pressure plate 6, the flange 4 and the sealing gasket II 8, a sealing gasket III 9 is arranged at the top of the copper rod 3 penetrating through the insulating layer, an explosion-proof layer 12 is arranged on the periphery of the epoxy resin layer 11, and a flame-retardant layer 13 is arranged on the periphery of the explosion-proof layer 12.

Furthermore, the first sealing gasket 7 and the third sealing gasket 9 are both in a tapered column structure with a narrow top and a wide bottom, and the second sealing gasket 8 is in a planar circular ring structure.

Furthermore, the diameter of the wide part of the first sealing gasket 7 is larger than that of the flange 4, the diameter of the wide part of the third sealing gasket 9 is 1.5 to 2 times of that of the narrow part, and the diameter of the second sealing gasket 8 is consistent with that of the flange 4.

Further, the thickness of the second sealing gasket 8 is not less than 4mm.

Furthermore, the materials of the first sealing gasket 7, the second sealing gasket 8 and the third sealing gasket 9 are all acrylic ester.

Further, the explosion-proof layer 12 is a carbon fiber layer.

Further, the flame retardant layer 13 is a mica flame retardant layer.

The working principle is as follows: the sleeve body 1 is fixed on the transformer by using the flange 4, and the contact surface of the sleeve body 1 and the transformer is sealed by using the second sealing gasket 8, so that the mechanical sealing effect is good; the flange 4 is protected for the second time by arranging the first conical sealing gasket 7 at the top of the pressure plate 6, so that external water is prevented from permeating into the transformer through the flange 4, the contact tightness between the sleeve body 1 and the transformer is higher, the conical structure of the first sealing gasket 7 is beneficial to outward water guiding and discharging, and the safety performance is high; the third sealing gasket 9 is used for sealing and connecting the contact part of the top of the insulating layer and the copper rod, the mechanical sealing effect of the conical sealing ring is good, and water is not accumulated easily in the conical structure; the design of fire-retardant layer 13, explosion-proof layer 12 for sleeve pipe body 1 fire behavior is high, and the security is strong.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, it will be obvious to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a dry-type high-voltage bushing of oil-resistant type, includes sleeve pipe body (1), sleeve pipe body (1) is including bar copper (3) that run through the center, the peripheral cladding of bar copper (3) has electric capacity core (2), the periphery of electric capacity core (2) is around being equipped with the insulating layer, and the insulating layer includes epoxy layer (11), be connected with flange (4) on sleeve pipe body (1), be equipped with wiring end (5) on flange (4), the last surface connection of flange (4) has pressure disk (6), its characterized in that: the lower surface of flange (4) is connected with sealed pad two (8), the upper surface of pressure disk (6) is connected with sealed pad (7), all set up the through-hole with bolt (10) looks adaptation on pressure disk (6), flange (4), sealed pad two (8), bar copper (3) run through insulating layer top position and are equipped with sealed pad three (9), the periphery of epoxy layer (11) is equipped with explosion-proof layer (12), the periphery of explosion-proof layer (12) is equipped with fire-retardant layer (13).

2. The oil-resistant dry high-voltage bushing according to claim 1, wherein: the first sealing gasket (7) and the third sealing gasket (9) are both in a tapered column structure with a narrow upper part and a wide lower part, and the second sealing gasket (8) is in a planar circular ring structure.

3. The oil-resistant dry high-voltage bushing according to claim 2, wherein: the diameter of the wide part of the first sealing gasket (7) is larger than that of the flange (4), the diameter of the wide part of the third sealing gasket (9) is 1.5 to 2 times that of the narrow part, and the diameter of the second sealing gasket (8) is consistent with that of the flange (4).

4. The oil-resistant dry high-voltage bushing according to claim 2 or 3, wherein: the thickness of the second sealing gasket (8) is not less than 4mm.

5. The oil-resistant dry high-voltage bushing according to any one of claims 1 to 3, wherein: the first sealing gasket (7), the second sealing gasket (8) and the third sealing gasket (9) are all made of acrylic ester.

6. The oil-resistant dry high-voltage bushing according to claim 1, wherein: the explosion-proof layer (12) is a carbon fiber layer.

7. The oil-resistant dry high-voltage bushing according to claim 1, wherein: the flame-retardant layer (13) is a mica flame-retardant layer.