阅读说明：本技术 一种芯棒及其制造方法 (Core rod and manufacturing method thereof ) 是由 章银龙 陈丹红 游焕洋 陆慰君 于 2019-04-13 设计创作，主要内容包括：本发明实施例提供了一种芯棒,属于绝缘子芯棒技术领域,所述芯棒包括：芯棒壳体,所述芯棒壳体内设置有一容置腔；支撑件,所述支撑件设置在所述容置腔内,所述支撑件均匀接触所述容置腔的内壁,并通过支撑件支撑容置腔；以及,填料部,所述填料部设置在所述容置腔内,并填充所述容置腔内的空隙。达到生产制造大直径芯棒,满足配套特高压使用的技术效果。(The embodiment of the invention provides a core rod, belonging to the technical field of insulator core rods, wherein the core rod comprises: the mandrel shell is internally provided with an accommodating cavity; the supporting piece is arranged in the accommodating cavity, uniformly contacts the inner wall of the accommodating cavity and supports the accommodating cavity through the supporting piece; and the filler part is arranged in the accommodating cavity and fills the gap in the accommodating cavity. The technical effects of manufacturing the large-diameter core rod and meeting the requirement of matching extra-high voltage use are achieved.)

1. A mandrel for use in the manufacture of an insulator, the mandrel comprising:

the mandrel shell is internally provided with an accommodating cavity;

the supporting piece is arranged in the accommodating cavity, uniformly contacts the inner wall of the accommodating cavity and supports the accommodating cavity through the supporting piece; and the number of the first and second groups,

the packing part is arranged in the accommodating cavity and fills the gap in the accommodating cavity.

2. The mandrel of claim 1 wherein the mandrel shell is provided with a shell stop slot relative to the support and the support is not displaced relative to the mandrel shell by the shell stop slot.

3. The mandrel of claim 1 wherein the support members are modular, the modular point of the support members being disposed at the center of the receiving cavity.

4. The mandrel of claim 3 wherein the support member is provided with a stop member relative to the mandrel shell, the stop member acting on the support member to cause a change in the dimension of the support member.

5. The mandrel according to claim 1, wherein the axial direction of the support member is provided with a support member positioning hole.

6. The mandrel of claim 1 wherein said support member and said mandrel shell are provided with a support member attachment slot and a shell attachment slot, respectively, said support member attachment slot and shell attachment slot corresponding and having a primary locating member disposed therebetween for attachment.

7. A method of manufacturing a mandrel, comprising the steps of:

preparing materials, namely manufacturing a core rod shell with a containing cavity by winding a glass fiber yarn and epoxy resin composite glue solution on a mould; manufacturing a supporting piece through glass fiber in a pultrusion mode; preparing a filler;

placing the supporting piece in the mandrel shell, so that the supporting piece is attached to the inner wall of the accommodating cavity, and supporting the mandrel shell;

and filling the filler into the core rod shell, wherein the filler part formed by the filler enables the gap in the accommodating cavity to be filled.

8. The method for manufacturing the mandrel as claimed in claim 7, wherein the filler comprises glass roving, silicon sand and epoxy resin composite glue solution, and is prepared by mixing the glass roving, the silicon sand and the epoxy resin composite glue solution according to a weight ratio of 30-35: 45-55: 15-20.

9. The mandrel manufacturing method according to claim 7 or 8, wherein the epoxy resin composite glue solution is prepared by mixing epoxy resin, a curing agent and an accelerator according to a weight ratio of 100: 80: 1.5.

10. The mandrel manufacturing method according to claim 7, wherein after the filler is injected to form the stable filler portion, the end face finishing is performed on the injection-molded product.

Technical Field

The invention relates to the technical field of insulator core rods, in particular to a core rod and a manufacturing method thereof.

Background

With the development of extra-high voltage grades of 800kV and over 1100kV of power transmission and transformation, in order to ensure the reliability of power transmission and transformation, the post insulator has been gradually developed from the height of a few meters in the past to the height of more than ten meters or even higher in design, and the diameter size requirement of the composite insulator core rod is also continuously increased in structural terms.

The traditional inner insulation core rod for the composite insulator is formed by pultrusion of glass fiber reinforced epoxy resin, the voltage grade and the requirement are continuously improved, and the core rod of the type is difficult to meet the requirement of ultra-high and extra-high voltage lines on the inner insulator core rod for the high-strength rod-shaped column type composite insulator; and the core rod is difficult to manufacture a large-diameter insulating core rod; the traditional process is difficult to manufacture the large-diameter core rod for the composite insulator with the diameter of more than 180 mm. Therefore, it is necessary to develop a large diameter mandrel by studying a method for manufacturing the mandrel at an early stage.

Therefore, the technical problems of the prior art are as follows: the production mode of traditional plug can't process major diameter plug, can't support extra-high voltage and use.

Disclosure of Invention

The embodiment of the application provides a core rod and a manufacturing method thereof, and solves the technical problems that a large-diameter core rod cannot be processed in a core rod production mode in the prior art and cannot be matched with extra-high voltage for use; the technical effects of manufacturing the large-diameter core rod and meeting the requirement of matching extra-high voltage use are achieved.

The embodiment of the application provides a plug for make insulator, the plug includes: the mandrel shell is internally provided with an accommodating cavity; the supporting piece is arranged in the accommodating cavity, uniformly contacts the inner wall of the accommodating cavity and supports the accommodating cavity through the supporting piece; and the filler part is arranged in the accommodating cavity and fills the gap in the accommodating cavity.

Preferably, the mandrel shell is provided with a shell limiting groove relative to the supporting piece, and the supporting piece is not displaced relative to the mandrel shell through the shell limiting groove.

Preferably, the supporting member is a combined type, and a combined point of the supporting member is arranged at the center of the accommodating cavity.

Preferably, the support is provided with a stop with respect to the mandrel shell, which acts on the support such that the dimension of the support varies.

Preferably, the support member is provided with a support member positioning hole in an axial direction.

Preferably, the support member and the mandrel shell are respectively provided with a support member connecting groove and a shell connecting groove, the support member connecting groove corresponds to the shell connecting groove, and an initial positioning member for connection is arranged between the support member connecting groove and the shell connecting groove.

A method of manufacturing a mandrel, comprising the steps of: preparing materials, namely manufacturing a core rod shell with a containing cavity by winding a glass fiber yarn and epoxy resin composite glue solution on a mould; manufacturing a supporting piece through glass fiber in a pultrusion mode; preparing a filler; placing the supporting piece in the mandrel shell, so that the supporting piece is attached to the inner wall of the accommodating cavity, and supporting the mandrel shell; and filling the filler into the core rod shell, wherein the filler part formed by the filler enables the gap in the accommodating cavity to be filled.

Preferably, the filler comprises glass roving, silicon crystal sand and epoxy resin composite glue solution, and is prepared by mixing according to the weight ratio of 30-35: 45-55: 15-20.

Preferably, the epoxy resin composite glue solution is prepared by mixing epoxy resin, a curing agent and an accelerator according to the weight ratio of 100: 80: 1.5.

Preferably, after the filler is injected to form a stable filler part, the finished product after injection molding is finished by end face finishing.

One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:

1. in the embodiment of the application, the mandrel shell and the supporting piece are produced firstly, a strong framework is constructed by utilizing the supporting piece behind the mandrel shell, and then the filler is placed in the framework, so that the large-diameter mandrel is produced; the technical problems that a large-diameter core rod cannot be machined in a core rod production mode in the prior art and cannot be matched with extra-high voltage for use are solved; the technical effects of manufacturing the large-diameter core rod and meeting the requirement of matching extra-high voltage use are achieved.

2. In the embodiment of the application, the supporting pieces are combined, and the limiting pieces are arranged relative to the combined supporting pieces, so that the embedding process of a single supporting piece part is smooth, and the possibility of blocking is reduced; the spacing between the individual support members is then filled with stoppers, so that the support of the support members becomes large, having the ability to support the entire mandrel shell.

Drawings

FIG. 1 is a schematic structural diagram of a mandrel shell in the manufacturing process in the embodiment of the present application;

FIG. 2 is a schematic sectional view of a mandrel shell according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a mandrel in an embodiment of the present application;

FIG. 4 is a cross-sectional view of a mandrel of an embodiment of the present application;

FIG. 5 is a cross-sectional view of a mandrel of yet another embodiment of the present application;

FIG. 6 is a cross-sectional view of yet another mandrel of an embodiment of the present application;

FIG. 7 is a schematic cross-sectional side view of yet another mandrel of an embodiment of the present application;

FIG. 8 is a first schematic cross-sectional side view of yet another mandrel of an embodiment of the present application;

FIG. 9 is a second schematic cross-sectional view of yet another mandrel of an embodiment of the present application;

FIG. 10 is a first cross-sectional view of yet another mandrel of an embodiment of the present application;

FIG. 11 is a second schematic cross-sectional view of yet another mandrel of an embodiment of the present application;

FIG. 12 is a third schematic cross-sectional view of yet another mandrel of an embodiment of the present application;

FIG. 13 is an enlarged view taken at A in FIG. 12;

FIG. 14 is a fourth schematic cross-sectional view of yet another mandrel of an embodiment of the present application;

FIG. 15 is a fourth schematic cross-sectional view of yet another mandrel of the present example;

FIG. 16 is a flow chart of a manufacturing process in an embodiment of the present application;

FIG. 17 is a flow chart of yet another method of manufacture in an embodiment of the present application;

FIG. 18 is a flow chart of yet another method of manufacturing an embodiment of the present application;

reference numerals: 1. a mandrel shell; 11. a shell limiting groove; 12. a shell connecting groove; 2. a support member; 21. a support member positioning hole; 22. a support connecting groove; 3. a filler section; 4. a limiting member; 41. a clamping piece; 5. a mold; 51. convex edges of the mold; 6. an operating hand; 7. an accommodating cavity; 71. the limiting piece accommodating cavity; 72. a filler accommodating chamber; 8. a primary positioning element; 81. a positioning part; 9. a glass fiber bundle.

Detailed Description

The embodiment of the application provides a mandrel, a mandrel shell 1 and a supporting piece 2 are produced firstly, a strong framework is constructed by utilizing the supporting piece 2 behind the mandrel shell 1, and then a filler is placed in the framework, so that a large-diameter mandrel is produced; the technical problems that a large-diameter core rod cannot be machined in a core rod production mode in the prior art and cannot be matched with extra-high voltage for use are solved; the technical effects of manufacturing the large-diameter core rod and meeting the requirement of matching extra-high voltage use are achieved.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.