CN217061614U

CN217061614U - 10kv composite insulator without prevention detection

Info

Publication number: CN217061614U
Application number: CN202123432435.8U
Authority: CN
Inventors: 张磊
Original assignee: Shandong Oulis New Material Technology Co ltd
Current assignee: Shandong Oulis New Material Technology Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-26
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a 10kv composite insulator that need not the prevention and detect mainly relates to composite insulator detection area. The core shaft is made of glass fiber epoxy resin, and the sheath is arranged on the core shaft in a multilayer umbrella skirt shape; a water-sensitive layer is arranged between the core shaft and the sheath, the water-sensitive layer can change color when meeting water, and the sheath is provided with an observation seam for observing the water-sensitive layer. The beneficial effects of the utility model reside in that: this composite insulator through add the water sensitive layer at sheath and dabber support, can show through the colour change when the sheath leakproofness descends, and then see by the staff through the observation seam on the sheath, has reduced composite insulator's the detection degree of difficulty.

Description

10kv composite insulator without prevention detection

Technical Field

The utility model relates to a composite insulator detection area specifically is a 10kv composite insulator that need not the prevention and detect.

Background

In a 10kv medium-voltage distribution network substation, a power transmission line is mainly erected by a composite insulator, the composite insulator comprises a mandrel, a sheath and hardware fittings, and the mandrel comprises thousands of glass fibers soaked with resin so as to ensure that the mandrel has enough mechanical strength but the atmospheric aging resistance of the mandrel is relatively weak; the sheath is usually made of a silicone rubber material and is wrapped around the outer surface of the mandrel to provide good external insulation on the one hand and to protect the mandrel from atmospheric attack and embrittlement of the mandrel on the other hand. Therefore, the air gap (gas gap) between the composite insulator sheath and the core rod is the focus of the detection.

Because the thermal expansion coefficients of the silica gel sheath and the glass fiber epoxy resin mandrel are different, and in addition, the silica gel sheath can be damaged in an outdoor and high-pressure bearing use environment, an air gap is generated between the silica gel sheath and the glass fiber epoxy resin mandrel, even the silica gel sheath and a hardware fitting are separated, the sealing performance of the sheath is reduced, the glass fiber epoxy resin mandrel is subjected to water embrittlement in the air, the mandrel has certain mechanical strength after embrittlement, and the mandrel can be fractured if pulling, collision and load increase occur, so that the mandrel embrittlement has great potential safety hazards.

The existing detection method is an ultrasonic detection method, mainly detects whether an air gap exists between a mandrel and a sheath, needs to detect the composite insulator layer by layer one by one, and has the defects of large detection workload, often omission and incapability of conveniently and effectively detecting the composite insulator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a need not 10kv composite insulator that prevention detected, when it produces the air gap between sheath and dabber, can show the change that the air gap brought through the outward appearance of sheath, need not carry out the air gap to composite insulator again and detect.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

a10 kv composite insulator without preventive detection comprises a mandrel, a sheath and a hardware fitting, wherein the hardware fitting comprises a fixed seat and a lead seat which are respectively arranged at two ends of the mandrel, the mandrel is made of glass fiber epoxy resin, and the sheath is arranged on the mandrel in a multilayer umbrella skirt shape;

be equipped with the water-sensitive layer between dabber and the sheath, the water-sensitive layer can meet the water and change colour, be equipped with the observation seam that is used for observing the water-sensitive layer on the sheath.

The water sensitive layer is a color change detection layer and is made of copper sulfate and silica gel.

The sheath is made by silica gel, it makes by transparent silica gel to survey the seam, it is equipped with a plurality ofly to survey the seam, both ends extend to on the gold utensil about the sheath.

The surface of the sheath is coated with a hydrophobic agent.

Contrast prior art, the beneficial effects of the utility model reside in that:

this need not 10kv composite insulator that prevention detected through add the water sensitive layer at sheath and dabber support, can show through the colour change when the sheath leakproofness descends, and then see by the staff through the observation seam on the sheath, has reduced composite insulator's the detection degree of difficulty, can directly judge composite insulator's the condition through observing, no longer need use check out test set to detect composite insulator.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1.

The reference numbers shown in the figures:

1. a mandrel; 2. a sheath; 3. a fixed seat; 4. a wire holder; 5. a water sensitive layer; 6. and (6) observing the seam.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

The utility model relates to a 10kv composite insulator without preventive detection, which comprises a mandrel 1, a sheath 2 and a hardware fitting, wherein the hardware fitting comprises a fixed seat 3 and a wire seat 4 which are respectively arranged at two ends of the mandrel 1, the mandrel 1 is made of glass fiber epoxy resin, and the sheath 2 is arranged on the mandrel 1 in a multilayer umbrella skirt shape;

the embrittlement of the mandrel 1 made of glass fiber epoxy resin is mainly caused by the fact that water in the air serves as a plasticizer, the epoxy resin is softened, debonding between the glass fiber and the epoxy resin is caused, the bending strength of the mandrel 1 is reduced, brittle fracture is easy to occur,

be equipped with water sensitive layer 5 between dabber 1 and sheath 2, water sensitive layer 5 is established between dabber 1 and sheath 2, is convenient for real-time supervision dabber 1 is last whether has moisture. Water-sensitive layer 5 can meet water and discolour, meets water-sensitive layer 5 that discolours and can express moisture testing result through the colour out, need not carry out the air gap again and detect. The sheath 2 is provided with an observation seam 6 for observing the water sensitive layer 5, the observation seam 6 is arranged on the sheath 2 for observing the water sensitive layer 5, and the condition of the water sensitive layer 5 can be observed through the observation seam 6 under the condition of ensuring the normal action of the sheath 2.

The water-sensitive layer 5 is a color-changing detection layer and is made of copper sulfate and silica gel, and the water-sensitive layer 5 made of copper sulfate and silica gel can express the moisture monitoring result through the color by virtue of the blue-changing characteristic of the copper sulfate when the copper sulfate is in contact with water; the copper sulfate is grey powder which is easy to absorb water and turns into blue-green blue copper sulfate pentahydrate, the copper sulfate pentahydrate gradually loses the bound water when being heated until the heating temperature reaches 258 ℃, the copper sulfate pentahydrate loses all the bound water and turns back to the copper sulfate, the melting temperature of the industrial silica gel used on the composite insulator is generally 500 ℃, and the decomposition temperature of the copper sulfate is up to 653 ℃, so that the copper sulfate can not be bound with the water in a high-temperature environment during the processing, but the copper sulfate can not be decomposed. The sealing degree of the sheath 2 determines whether the water sensitive layer 5 containing copper sulfate changes color;

silica gel is added into the water sensitive layer 5, so that the water sensitive layer 5 can combine the sheath 2 with the mandrel 1, and the sheath 2 is prevented from falling off.

The sheath 2 is made by silica gel, and the sheath 2 that silica gel was made has good insulating properties and corrosion resisting property, and the quality is light, can prevent that the sheath 2 from droing with the quick layer 5 organic combination of water. The observation seam 6 is made by transparent silica gel, and the observation seam 6 made by transparent silica gel can be organically combined with the silica gel sheath 2, thereby ensuring the tightness of the sheath 2. The observation seams 6 are arranged in plurality, and the observation seams 6 are arranged on the sheath 2, so that the color change condition of each area of the water sensitive layer 5 can be observed more quickly. Both ends extend to the gold utensil about 2 jackets, because 2 tip of jacket are for exposing the connecting portion outside, extend to the jacket 2 on the gold utensil, improve the leakproofness of jacket 2.

The surface of the sheath 2 is coated with a hydrophobic agent, the hydrophobic agent is added into the silica gel, so that the binding property of the silica gel and the copper sulfate is reduced, and the hydrophobic agent is coated on the surface of the sheath 2 instead of being mixed in the sheath 2, so that the sheath 2, the water sensitive layer 5 and the mandrel 1 can be tightly combined.

Claims

1. A10 kv composite insulator without preventive detection comprises a mandrel (1), a sheath (2) and a hardware fitting, wherein the hardware fitting comprises a fixed seat (3) and a wire seat (4) which are respectively arranged at two ends of the mandrel (1), the mandrel (1) is made of glass fiber epoxy resin, and the sheath (2) is arranged on the mandrel (1) in a multilayer umbrella skirt shape;

the method is characterized in that: be equipped with water-sensitive layer (5) between dabber (1) and sheath (2), water-sensitive layer (5) can meet the water and change colour, be equipped with on sheath (2) and be used for observing observation seam (6) on water-sensitive layer (5).

2. The 10kv composite insulator without preventive detection of claim 1, characterized in that: the water sensitive layer (5) is a color change detection layer.

3. The 10kv composite insulator without preventive detection of claim 1, characterized in that: the sheath (2) is made of silica gel, the upper end and the lower end of the sheath (2) extend to the hardware fitting, and the observation seam (6) is made of transparent silica gel.

4. The 10kv composite insulator without preventive detection according to claim 1, characterized in that: the surface of the sheath (2) is coated with a hydrophobic agent.