CN217562309U

CN217562309U - Post insulator

Info

Publication number: CN217562309U
Application number: CN202220653410.6U
Authority: CN
Inventors: 欧玉文; 吴海媛
Original assignee: Liling Huaxin Insulator Technology Co ltd
Current assignee: Liling Huaxin Insulator Technology Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-10-11
Anticipated expiration: 2032-03-24

Abstract

The utility model provides a post insulator, which comprises a core rod and a metal flange sealing element; the core rod is a hollow cylinder and is filled with insulating media; an inner contraction neck is formed at two ends of the core rod, and an annular groove is formed on the inner contraction neck; an annular convex step corresponding to the annular groove is formed on the metal flange sealing element, and a first sealing element is sealed between the annular groove and the annular convex step; the first sealing element is a combined sealing element and comprises a first sealing ring and a second sealing ring, and a sub-annular groove is formed in the first sealing ring; a sub-annular convex step is formed on the second sealing ring, the sub-annular convex step is in interference fit with the sub-annular groove, and the hardness of the material of the second sealing ring is smaller than that of the first sealing ring. The utility model provides a post insulator simple structure, reasonable in design, it is insulating effectual, and long service life.

Description

Post insulator

Technical Field

The utility model relates to a power equipment technical field specifically is a post insulator with preferred electrical property.

Background

The post insulator is a special insulating control part, usually made of silica gel or ceramic, and is mainly used for insulating, mechanically connecting and supporting in an overhead power transmission line. Generally, the reliable operation of the power transmission line is closely related to the quality of the insulator, the electrical property directly influences the use effect of the insulator, the insulator should not generate flashover breakdown caused by the change of the environment and the electrical load condition to fail, otherwise, the insulator loses the insulation effect to damage the service life and the operation life of the whole line, and potential safety hazard is brought to the operation of electrical equipment.

A common technical form of post insulator is to use a hollow insulator as a substrate, and use a material to perform filling and then molding, and the technical form of post insulator has the following technical features: the insulator obtained by filling the solid material has large density and heavy weight, is obstructed in the construction operation process, usually adopts multi-material combination, has high cost, and easily generates micro-crack defects and interface problems in the material after molding due to the difficulty in controlling the material molding process, thereby influencing the electrical performance of the post insulator; the filling of gas and oil can effectively avoid the problems, but the problems lie in that the sealing property requirement is high when the insulating gas or oil is filled in the hollow insulating tube, the problems of negative pressure and operation and maintenance monitoring are easily caused by the defects of the sealing property, and the like, so the production process requirement is difficult, the manufacturing cost is relatively high, and higher requirements are provided for the operation and maintenance.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the present invention is to provide a post insulator to solve the above-mentioned disadvantages in the background art.

The utility model provides a technical problem adopt following technical scheme to realize:

a post insulator comprises a core rod and two metal flange sealing pieces which are respectively assembled on the upper end surface and the lower end surface of the core rod in a sleeving manner; the core rod is of a hollow cylinder structure, an insulating medium is filled in the hollow cavity, and an insulating umbrella skirt is formed on the outer cylinder surface of the core rod;

annular inner necks are formed at two ends of the core rod, and annular grooves are formed on the end faces of the inner necks; the metal flange sealing element is provided with a sealing cover surface, an annular convex step corresponding to the annular groove in position is formed on the inner side of the sealing cover surface, and a first sealing element is sealed between the annular groove and the annular convex step;

the first sealing element is a combined sealing element and comprises a first sealing ring and a second sealing ring, the first sealing ring is embedded in the annular groove and attached to the bottom surface of the annular groove, and a sub-annular groove is formed in the upper surface of the first sealing ring; the second sealing ring is sleeved on the annular convex step and is provided with a sub-annular convex step matched with the sub-annular groove, and the sub-annular convex step is in interference fit with the sub-annular groove.

The core rod is a porcelain insulator, and a vulcanized silicone rubber layer is formed on the umbrella skirt of the core rod.

As a further limitation, the core rod is a composite porcelain insulator.

More preferably, the cross section of the inner neck is a right trapezoid, and a hypotenuse of the right trapezoid faces a gravity center side of the insulating tube.

As a further limitation, adhesive positions are formed on the metal flange sealing element corresponding to the outer cylindrical surface of the core rod, the adhesive positions are a plurality of groups of annular grooves formed on the inner side surface of the metal flange sealing element, and a circulation groove is formed between adjacent annular grooves so as to facilitate pressure glue injection;

the metal flange seal is further formed with another sealing groove on the inner sidewall between the glue site and the closure lid surface, and is sealed therein by a second seal.

By way of further limitation, the insulating medium is an insulating gas or an insulating oil.

Has the advantages that: the utility model discloses a post insulator simple structure is reasonable, convenient assembling and sealed effectual, and its use through adduction neck and combination sealing member seals through the oppression deformation between the combination sealing member, can effectively improve the sealing performance to insulating medium, and the insulating medium of cooperation high performance can make post insulator's electrical property more excellent, has guaranteed post insulator's life, has improved the power consumption security of electric wire netting.

Drawings

Fig. 1 is a sectional view of an end face structure of the preferred embodiment of the present invention.

Fig. 2 is a detail enlarged schematic view of a portion a in fig. 1.

Wherein: 1. a metal flange seal; 2. a core rod; 3. a first seal member; 4. a second seal member; 5. Gluing position; 11. a closure surface; 12. a cannula body; 13. an annular convex step; 21. a pipe body; 22. adduction of the neck; 23. an umbrella skirt; 31. a second seal ring; 32. a first seal ring.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Referring to fig. 1 and 2, in the present embodiment, the post insulator is a combination structure of a mandrel 2 and a metal flange seal 1, wherein the mandrel 2 is a ceramic insulator, and the main structure thereof is a tube 21, sheds 23 are formed on the outer surface of the tube 21 at intervals, and vulcanized silicone Rubber (RTV) is formed on the surface of the sheds 23 by integral vacuum injection to obtain the effect of increasing the creepage distance.

In another embodiment, the core rod 2 may be a composite insulator.

The metal flange sealing parts 1 matched with the single core rod 2 are provided with two metal flange sealing parts 1, the end faces of the core rods 2 are sleeved from the outer sides of the upper end part and the lower end part of the pipe body 21 respectively, and the space inside the pipe body 21 after the metal flange sealing parts 1 are assembled is filled with insulating gas as an insulating medium by the core rods 2.

The upper and lower end portions of the tubular body 21 of the mandrel 2 are respectively formed with an inward-contracting neck 22 having an annular shape as a whole, and the inward-contracting necks 22 provided on the upper and lower end surfaces are symmetrical in structure, and now the structure of the inward-contracting neck 22 shown in fig. 1 will be described, in which the cross section of the inward-contracting neck 22 is a right trapezoid, and the oblique side of the right trapezoid faces the center of gravity of the tubular body 21.

A ring of annular grooves are formed on the outer end surface of the inner neck 22, a first sealing ring 32 is embedded in the annular grooves, and the bottom surface of the first sealing ring 32 is attached to the bottom surface of the annular groove. And the metal flange seal 1 comprises a closure surface 11 and a sleeve body 12; an annular convex step 13 opposite to the annular groove is formed on the lower surface of the closed surface 11, and a second sealing ring 31 is sleeved on the annular convex step 13; the first sealing ring 32 and the second sealing ring 31 jointly form a first sealing element, and a matched sub-annular groove and a sub-annular convex step are respectively formed on the opposite surfaces of the first sealing ring 32 and the second sealing ring 31.

In the embodiment, the sub-annular convex step is in interference fit with the sub-annular groove so as to realize sealing by external pressure pressing; in order to improve the sealing effect between the first seal ring 32 and the second seal ring 31, the first seal ring 32 and the second seal ring 31 may be molded using different sealing materials so that the hardness of the second seal ring 31 is lower than that of the first seal ring 32, and the sub-annular groove may be filled with the deformation of the first seal ring 32 when the metal flange seal 1 is pressed in, thereby ensuring the sealing effect.

In this embodiment, the metal flange sealing member 1 is fitted with the upper part of the pipe body 21 through the sleeve body 12 and assembled, and the adhesive positions 5 are preformed at the assembly positions, the adhesive positions 5 are a plurality of groups of annular grooves formed on the inner side surface of the sleeve body 12 on the metal flange sealing member 1, and circulation grooves are formed between adjacent annular grooves to facilitate pressure glue injection; an annular groove is also formed between the upper part of the gluing station 5 and the closing surface 11, and a second sealing element 4 is embedded in the annular groove. The second sealing element 4 has a different function from the first sealing element 3, and is configured to prevent an adhesive in a process of assembling the metal flange sealing element 1 and the core rod 2 from entering a gap between the sealing surface 11 and an end surface of the core rod 2, so as to prevent the first sealing element 3 from affecting the sealing between the core rod 2 and the metal flange sealing element 1.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A post insulator is characterized by comprising a core rod and two metal flange sealing pieces which are respectively assembled on the upper end surface and the lower end surface of the core rod in a sleeving manner; the core rod is of a hollow cylinder structure, an insulating medium is filled in the hollow cavity, and an insulating umbrella skirt is formed on the outer cylinder surface of the core rod;

annular adduction necks are formed at two ends of the core rod, and annular grooves are formed on the end faces of the adduction necks; the metal flange sealing element is provided with a sealing cover surface, an annular convex step corresponding to the annular groove in position is formed on the inner side of the sealing cover surface, and a first sealing element is sealed between the annular groove and the annular convex step;

2. The post insulator of claim 1, wherein the core rod is a porcelain insulator, and a vulcanized silicone rubber layer is molded on the shed of the core rod.

3. The post insulator of claim 1, wherein the core rod is a composite porcelain insulator.

4. The post insulator according to claim 1, wherein the cross section of the inner neck is a right trapezoid, and an oblique side of the right trapezoid faces a center of gravity of the tube body of the plug.

5. The post insulator of claim 1, wherein the metal flange sealing element is formed with adhesive sites corresponding to the outer cylindrical surface of the mandrel, the adhesive sites are a plurality of sets of annular grooves formed on the inner side surface of the metal flange sealing element, and a circulation groove is formed between adjacent annular grooves.

6. The post insulator of claim 5, wherein the metal flange seal further defines a seal groove in the inner sidewall between the glue location and the surface of the closure cap, and is sealed in the seal groove by a second seal.

7. The post insulator according to claim 1, wherein the insulating medium is an insulating gas or an insulating oil.