CN112331427B - Waterproof electric power insulator and processing method thereof - Google Patents
Waterproof electric power insulator and processing method thereof Download PDFInfo
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- CN112331427B CN112331427B CN202011223391.5A CN202011223391A CN112331427B CN 112331427 B CN112331427 B CN 112331427B CN 202011223391 A CN202011223391 A CN 202011223391A CN 112331427 B CN112331427 B CN 112331427B
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- elastic sealing
- steel cap
- waterproof
- sealing ring
- porcelain head
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/50—Insulators or insulating bodies characterised by their form with surfaces specially treated for preserving insulating properties, e.g. for protection against moisture, dirt, or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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Abstract
The invention discloses a waterproof electric power insulator and a processing method, belonging to the field of insulators and comprising a steel cap and an insulating porcelain piece; the top of the insulating porcelain piece is provided with a connecting porcelain head; the steel cap is sleeved on the connecting porcelain head, and a cement glue layer is arranged between the outer side wall of the connecting porcelain head and the inner side wall of the steel cap; the outer side wall of the connecting porcelain head and the inner side wall of the steel cap are provided with elastic sealing rings, the elastic sealing rings are located at the root positions of the connecting porcelain heads, and waterproof isolating films are arranged between the elastic sealing rings and the cement glue layers. Through the waterproof barrier film of elastic sealing ring extrusion for waterproof barrier film can be fine with the laminating of cement glue film, under the sealed water proof effect of elastic sealing ring, cooperate waterproof barrier film simultaneously to make moisture content can not get into the cement glue film basically, utilize the cold expanding characteristic of elastic sealing ring under the lower circumstances of temperature winter simultaneously, can guarantee sealed degree.
Description
Technical Field
The invention relates to the field of insulators, in particular to a waterproof electric insulator and a processing method thereof.
Background
The porcelain insulator is an important component of a transformer substation and a transmission line, and mainly has the functions of connecting a lead on a bracket, and insulating, mechanically connecting and supporting the lead. At present, a metal cap of a porcelain insulator used in a power transmission line is fixedly connected with a porcelain body through an adhesive (cement), and due to different expansion coefficients of the three substances, after the porcelain insulator is frozen, the phenomenon that the porcelain is frozen or the metal cap is swelled occurs frequently because the adhesive absorbs water and is affected by damp in cold winter, so that the porcelain insulator is damaged, and the safe operation of the power transmission line is influenced.
The existing umbrella-shaped insulator cannot well prevent moisture from entering cement after being cemented by the cement, so that the ceramic or glass part is easily damaged due to freezing expansion in winter.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a waterproof electric insulator and a processing method thereof, which can well prevent moisture from entering a cement layer and can ensure a better effect in cold weather.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a waterproof electric power insulator which comprises a steel cap and an insulating porcelain piece; the top of the insulating porcelain piece is provided with a connecting porcelain head; the steel cap is sleeved on the connecting porcelain head, and a cement glue layer is arranged between the outer side wall of the connecting porcelain head and the inner side wall of the steel cap; the outer side wall of the connecting porcelain head and the inner side wall of the steel cap are provided with elastic sealing rings, the elastic sealing rings are located at the root positions of the connecting porcelain heads, and waterproof isolating films are arranged between the elastic sealing rings and the cement glue layers.
The invention has the preferable technical scheme that an extrusion flange is arranged on the inner side edge of one end, close to the elastic sealing ring, of the steel cap, the elastic sealing ring is provided with a limiting notch, and the extrusion flange is positioned in the limiting notch.
The invention preferably adopts the technical scheme that a limiting bulge is arranged on the outer side wall of the connecting porcelain head, the limiting bulge partially protrudes out of the plane of the cement glue layer, the waterproof isolating membrane covers the limiting bulge, and the other end of the elastic sealing ring is abutted against the limiting bulge.
The invention has the preferable technical scheme that the position of the steel cap, which is provided with the extrusion flange, is bent inwards so that the extrusion flange can apply an upward oblique acting force to the elastic sealing ring.
The invention has the preferable technical scheme that a fixed cement layer is filled in the connecting porcelain head, a metal rod is arranged in the fixed cement layer, and a buffer cushion layer is arranged between the top of the metal rod and the top of the inner wall of the connecting porcelain head.
The invention has the preferable technical scheme that a waterproof diaphragm is arranged on the surface of the fixed cement layer, water absorption expansion rubber covers the waterproof diaphragm, and an opening sealing washer covers the water absorption expansion rubber.
The invention has the preferable technical scheme that an extrusion inclined table is arranged at the lower side edge of the connecting porcelain head, the extrusion inclined table is farther away from the opening of the fixed cement layer and is smaller, and the opening sealing gasket is extruded in the direction of the fixed cement layer in the past.
A processing method of a waterproof electric insulator comprises the following steps: step S00: the method comprises the following steps of (1) manufacturing an insulating porcelain piece by integrally molding a mold, and manufacturing a steel cap by adopting a casting method; step S10: installing a buffer cushion layer and a metal rod in the connecting porcelain head, and then filling cement materials in the connecting porcelain head to form a fixed cement layer; step S20: sequentially covering a waterproof diaphragm, water-swelling rubber and an opening sealing gasket on the fixed cement layer; step S30: and injecting cement materials into the steel cap to form a cement glue layer, inserting the connecting porcelain head into the steel cap, and then installing the elastic sealing ring.
The preferred technical scheme of the invention is that in step S00, the insulating porcelain piece is further extruded and processed into a limiting bulge and an extrusion inclined table by a tool after being molded and then is fired, or a mode of adhesion processing after molding can be adopted; the steel cap can be cast integrally to form the extrusion flange in a mode of directly setting a die during casting, or can be installed in a later-period welding mode.
The invention has the beneficial effects that:
the invention provides a waterproof electric power insulator which comprises a steel cap and an insulating porcelain piece; the top of the insulating porcelain piece is provided with a connecting porcelain head; the steel cap is sleeved on the connecting porcelain head, and a cement glue layer is arranged between the outer side wall of the connecting porcelain head and the inner side wall of the steel cap; the outer side wall of the connecting porcelain head and the inner side wall of the steel cap are provided with elastic sealing rings, the elastic sealing rings are located at the root positions of the connecting porcelain heads, and waterproof isolating films are arranged between the elastic sealing rings and the cement glue layers. Through the waterproof barrier film of elastic sealing ring extrusion for waterproof barrier film can be fine with the laminating of cement glue film, under the sealed water proof effect of elastic sealing ring, cooperate waterproof barrier film simultaneously to make moisture content can not get into the cement glue film basically, utilize the cold expanding characteristic of elastic sealing ring under the lower circumstances of temperature winter simultaneously, can guarantee sealed degree.
Drawings
Fig. 1 is a schematic view of the overall structure of a waterproof power insulator according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1 according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1 according to an embodiment of the present invention;
in the figure:
1. an insulating porcelain; 2. a steel cap; 3. a cement glue layer; 4. a metal rod; 5. a cushion layer; 6. an opening sealing gasket; 7. an elastic sealing ring; 8. water-swellable rubber; 9. a waterproof membrane; 11. connecting a porcelain head; 12. extruding the inclined table; 111. a limiting bulge; 21. extruding the flange; 71. a limiting notch; 72. a waterproof isolating membrane.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-3, the present embodiment provides a waterproof power insulator, which includes a steel cap 2, an insulating porcelain 1; the top of the insulating porcelain piece 1 is provided with a connecting porcelain head 11; the steel cap 2 is sleeved on the connecting porcelain head 11, and a cement glue layer 3 is arranged between the outer side wall of the connecting porcelain head 11 and the inner side wall of the steel cap 2; connect the lateral wall of porcelain head 11 with be provided with elastic sealing ring 7 between the inside wall of steel cap 2, elastic sealing ring 7 is located connect 11 root positions of porcelain head, elastic sealing ring 7 with be provided with waterproof barrier film 72 between the cement glue film 3. Just need install waterproof barrier film 72 and elastic sealing ring 7 earlier when cement glue film 3 has not solidified completely, cement glue film 3 volume can contract when solidifying to make elastic sealing ring 7 extruded, improve the leakproofness. Elastic seal 7 can adopt low temperature resistant rubber material, selects low temperature resistant degree according to the low temperature condition of every region difference for certain cold swelling performance can not lose elasticity again in having at low temperature. So that the elastic sealing ring 7 can be further sealed firmly when being cooled. Extrude waterproof barrier film 72 through elastic sealing ring 7 for waterproof barrier film 72 and the laminating of cement glue film 3 are firm, and elastic sealing ring 7 itself can absorb a small amount of moisture content, because there is certain difference in the coefficient of heat conductivity between cement glue film 3 and the elastic sealing ring 7, the moisture content in elastic sealing ring 7 is the condensation at cement glue film 3 surface easily and becomes the drop of water, and can be fine isolated through waterproof barrier film 72's effect.
In order to conveniently and fixedly mount the elastic sealing ring 7 and reduce the water vapor entering, preferably, the inner side edge of one end of the steel cap 2 close to the elastic sealing ring 7 is provided with an extrusion flange 21, the elastic sealing ring 7 is provided with a limiting notch 71, and the extrusion flange 21 is located in the limiting notch 71. Elastic sealing ring 7 is fixed through the joint that extrusion flange 21 and spacing breach 71's cooperation can be fine, and the design of extrusion flange 21 makes elastic sealing ring 7 and the area reduction of air contact simultaneously to steam is more difficult to get into inside.
Preferably, the outer side wall of the connection porcelain head 11 is provided with a limiting protrusion 111, the limiting protrusion 111 partially protrudes out of the plane of the cement glue layer 3, the waterproof isolating membrane 72 covers the limiting protrusion 111, and the other end of the elastic sealing ring 7 abuts against the limiting protrusion 111. The spacing protrusions 111 press the elastic seal ring 7 from two diagonal positions by cooperation with the pressing flange 21, thereby ensuring a tight seal isolation surface.
Preferably, the steel cap 2 is provided with the pressing flange 21, and the position of the pressing flange 21 is bent inward, so that the pressing flange 21 applies an upward oblique force to the elastic sealing ring 7. Therefore, the deformation between the steel cap 2 and the connecting porcelain head 11 can be better transmitted to the elastic sealing ring 7, and the elastic sealing ring 7 can maintain a relatively stable sealing surface at a diagonal position.
Preferably, the connection porcelain head 11 is internally filled with a fixed cement layer, a metal rod 4 is arranged in the fixed cement layer, and a buffer cushion layer 5 is arranged between the top of the metal rod 4 and the top of the inner wall of the connection porcelain head 11. Further, a waterproof diaphragm 9 is arranged on the surface of the fixed cement layer, water-absorbing expansion rubber 8 covers the waterproof diaphragm 9, and an opening sealing washer 6 covers the water-absorbing expansion rubber 8. 1 both sides of insulating porcelain spare all need carry out fixed connection with cement, connect 11 downside of porcelain head different with the upside, and the upside is the cement glue film 3 of parcel formula, and it is comparatively sensitive to deformation. The lower side of the connecting porcelain head 11 is a cylindrical solid fixed cement layer, so that a waterproof diaphragm 9, water-absorbing expansion rubber 8 and an opening sealing washer 6 are designed at the end part, the waterproof diaphragm 9, the water-absorbing expansion rubber 8 and the opening sealing washer 6 can be provided with openings, the inner diameter of the waterproof diaphragm is matched with the diameter of the metal rod 4, and the waterproof diaphragm, the water-absorbing expansion rubber 8 and the opening sealing washer 6 can be directly clamped from the side; or the iron sheet at one end of the metal rod 4 is installed in a later welding mode, and the waterproof diaphragm 9 without the opening, the water absorption expansion rubber 8 and the opening sealing washer 6 are sleeved in the installation. The tightness of its opening seal gasket 6 cannot be provided by means of deformation pressing. The water-swellable rubber 8 is designed such that the sealing degree can be improved by pressing the opening-sealing gasket 6 with the water-swellable rubber 8 when the moisture content increases.
Preferably, an extrusion inclined table 12 is arranged at the lower side edge of the connection porcelain head 11, the extrusion inclined table 12 is farther away from the opening of the fixed cement layer and is smaller, and the opening sealing gasket 6 is extruded in the direction of the fixed cement layer. The aperture sealing gasket 6 can be conveniently fixed by pressing the ramp 12.
A processing method of a waterproof electric insulator comprises the following steps: step S00: the method comprises the following steps of (1) integrally forming and manufacturing an insulating porcelain piece 1 by using a mould, and manufacturing a steel cap 2 by adopting a casting method; step S10: installing a cushion layer 5 and a metal rod 4 in the connecting porcelain head 11, and then filling cement materials in the connecting porcelain head 11 to form a fixed cement layer; step S20: a waterproof diaphragm 9, water-absorbing expansion rubber 8 and an opening sealing gasket 6 are sequentially covered on the fixed cement layer; step S30: cement materials are injected into the steel cap 2 to form a cement glue layer 3, the connecting porcelain head 11 is inserted into the steel cap 2, and then the elastic sealing ring 7 is installed. Preferably, in step S00, after the insulating ceramic member 1 is formed, the limiting protrusion 111 and the pressing ramp 12 are further extruded and processed by using a tool and then fired, or a post-forming adhesion process may be used; the steel cap 2 can be integrally cast to form the extrusion flange 21 by directly setting a die during casting, or can be installed by later welding. By adopting the processing mode, the structure can be conveniently produced and processed after being changed.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (5)
1. The utility model provides a waterproof type electric power insulator which characterized in that:
comprises a steel cap (2) and an insulating porcelain piece (1); the top of the insulating porcelain piece (1) is provided with a connecting porcelain head (11);
the steel cap (2) is sleeved on the connecting porcelain head (11), and a cement glue layer (3) is arranged between the outer side wall of the connecting porcelain head (11) and the inner side wall of the steel cap (2);
an elastic sealing ring (7) is arranged between the outer side wall of the connecting porcelain head (11) and the inner side wall of the steel cap (2), the elastic sealing ring (7) is positioned at the root position of the connecting porcelain head (11), and a waterproof isolating film (72) is arranged between the elastic sealing ring (7) and the cement glue layer (3);
the inner side edge of one end of the steel cap (2) close to the elastic sealing ring (7) is provided with an extrusion flange
(21) The elastic sealing ring (7) is provided with a limiting notch (71), and the extrusion flange (21) is positioned in the limiting notch (71);
the outer side wall of the connecting porcelain head (11) is provided with a limiting bulge (111), the limiting bulge (111) partially protrudes out of the plane of the cement glue layer (3), the waterproof isolating membrane (72) covers the limiting bulge (111), and the other end of the elastic sealing ring (7) abuts against the limiting bulge (111);
a fixed cement layer is filled in the connecting porcelain head (11), a metal rod (4) is arranged in the fixed cement layer, and a buffer cushion layer (5) is arranged between the top of the metal rod (4) and the top of the inner wall of the connecting porcelain head (11);
the waterproof diaphragm (9) is arranged on the surface of the fixed cement layer, the waterproof diaphragm (9) is covered with water-absorbing expansion rubber (8), and the water-absorbing expansion rubber (8) is covered with an opening sealing gasket (6).
2. The waterproof electric insulator according to claim 1, wherein:
the steel cap (2) is provided with the position of the extrusion flange (21) is bent towards the inner side, so that the extrusion flange (21) provides the upward acting force of the elastic sealing ring (7) in an inclined mode.
3. The waterproof electric insulator according to claim 1, wherein:
connect porcelain head (11) downside edge and be provided with extrusion sloping platform (12), extrusion sloping platform (12) keep away from more the fixed cement layer opening is littleer, in the past fixed cement layer direction extrusion opening seal gasket (6).
4. A method for processing a waterproof electric insulator according to claim 3, wherein: the method comprises the following steps: step S00: the insulating porcelain (1) is manufactured by integrally molding a die by casting
The manufacturing method is used for manufacturing the steel cap (2);
step S10: installing a cushion layer (5) and a metal rod (4) in the connecting porcelain head (11), and then filling cement materials in the connecting porcelain head (11) to form a fixed cement layer;
step S20: a waterproof diaphragm (9), water-absorbing expansion rubber (8) and an opening sealing gasket (6) are sequentially covered on the fixed cement layer;
step S30: cement materials are injected into the steel cap (2) to form a cement glue layer (3), the connecting porcelain head (11) is inserted into the steel cap (2), and then the elastic sealing ring (7) is installed.
5. The method for processing a waterproof electric insulator according to claim 4, wherein: in step S00, after the insulating porcelain piece (1) is formed, a tool is used for further extruding and processing a limit bump
Firing after lifting (111) and extruding the inclined table (12); the steel cap (2) is integrally cast to form an extrusion flange (21) by directly arranging a die during casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011223391.5A CN112331427B (en) | 2020-11-05 | 2020-11-05 | Waterproof electric power insulator and processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011223391.5A CN112331427B (en) | 2020-11-05 | 2020-11-05 | Waterproof electric power insulator and processing method thereof |
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| Publication Number | Publication Date |
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| CN112331427A CN112331427A (en) | 2021-02-05 |
| CN112331427B true CN112331427B (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011223391.5A Active CN112331427B (en) | 2020-11-05 | 2020-11-05 | Waterproof electric power insulator and processing method thereof |
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| CN115116684B (en) * | 2022-08-31 | 2022-11-08 | 国网山西省电力公司长治供电公司 | Lightning arrester with base having moisture dissipating function |
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| FR2943169A1 (en) * | 2009-03-10 | 2010-09-17 | Sediver | PROCESS FOR MANUFACTURING A SEALING MORTAR FOR HIGH-VOLTAGE ELECTRIC INSULATOR METAL PARTS IN GLASS OR PORCELAIN |
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| JP2007207603A (en) * | 2006-02-02 | 2007-08-16 | Toshiba Corp | Molded insulator for gas insulation and its molding method |
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