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A flexible cable accessory explosion-proof device and installation method

A technology for cable accessories and explosion-proof devices, which is applied in the direction of gas-filled/oil-filled cable accessories, overhead lines/cable equipment, etc., can solve the problems of not being able to fully adapt to emergency situations, not enough to accommodate cable accessories, and not being able to be changed, so as to increase explosion-proofing effect, reducing site or space limitations, and avoiding fire accidents

Active Publication Date: 2017-12-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And it needs to be manufactured according to the size of the actual cable accessories. Once the manufacture is completed, it cannot be changed, and it cannot be fully adapted to the emergency situations that may occur in the actual site and during the construction process, such as the narrow space, difficult installation or insufficient space to accommodate the size of the cable accessories, etc.

Method used

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  • A flexible cable accessory explosion-proof device and installation method
  • A flexible cable accessory explosion-proof device and installation method
  • A flexible cable accessory explosion-proof device and installation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Installation of explosion-proof devices such as Figure 1(a) to Figure 1(d) shown. First, evenly wrap a layer of aluminum foil on the cable accessory 1 with a voltage level of 10kV or 20kV, and the winding length of the aluminum foil is 20% longer than that of the cable accessory 1. Afterwards, the flexible oil-filled tape 3 made of silicone rubber is filled with silicone oil and then evenly wound onto the aluminum foil of the cable accessory. The winding length of the flexible oil-filled tape 3 is 5% less than that of the aluminum foil wound on the cable accessory 1. When winding, the inner side of the flexible oil-filled belt 3 is in contact with the cable. After the winding is completed, wrap the nylon mesh cloth on the flexible oil-filled belt 3 evenly, and tie the excess parts on both sides of the nylon mesh cloth on the cable accessory 1 to complete the installation. .

[0047] The structure and size of the flexible oil-filled belt 3 are as follows: Figure 2(a...

Embodiment 2

[0051] On the basis of Example 1, the structure and material of the flexible oil-filled belt 3 are optimized, ethylene-propylene rubber is selected as the rubber, and mineral insulating oil is selected as the insulating oil. The structure of the new flexible oil-filled belt 3 is shown in Figure 3(a) and Figure 3(b), in which there are five oil-filled cells on the flexible oil-filled belt 3.

[0052] The thickness d1 of the first side wall is 1 cm, the height h of the oil-filled grid 5 is 1.5 cm, the thickness d2 of the second side wall is 2 cm, d1:h:d2=1:1.5:2.

[0053] In the oil-filled grid unit, the width f2 of the oil-filled grid 5 accounts for 12% of the length L1 of the flexible oil-filled belt 3, and the wall thickness f1 of the left side wall and the right side wall respectively accounts for 4% of the length L1 of the flexible oil-filled belt 3; The length f4 of the oil-filled grid 5 accounts for 80% of the width L2 of the flexible oil-filled belt 3 , and the wall thic...

Embodiment 3

[0056] On the basis of Example 2, the structure and material of the flexible oil-filled belt 3 are optimized, butadiene rubber is selected as the rubber, and vegetable insulating oil is selected as the insulating oil. The structure of the new flexible oil-filled belt 3 is shown in Figure 4(a) and Figure 4(b), in which there are 8 oil-filled grid units on the flexible oil-filled belt 3, and the specific dimensions are shown in the figure.

[0057] The thickness d1 of the first side wall is 1 cm, the height h of the oil-filled grid 5 is 1.5 cm, the thickness d2 of the second side wall is 2 cm, d1:h:d2=1:1.5:2.

[0058] In the oil-filled grid unit, the width f2 of the oil-filled grid 5 accounts for 8.5% of the length L1 of the flexible oil-filled belt 3, and the wall thickness f1 of the left side wall and the right side wall respectively accounts for 2% of the length L1 of the flexible oil-filled belt 3; The length f4 of the oil-filled grid 5 accounts for 68% of the width L2 of t...

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Abstract

The invention relates to a flexible cable accessory explosion-proof apparatus and a mounting method. The apparatus comprises a flexible oil-filling belt capable of being fixed and wrapped on a cable accessory, wherein a plurality of hollow oil-filling compartments are arranged in the flexible oil-filling belt and filled with insulating oil used for flame retardance; and an oil-filling hole capable of being sealed is formed in each oil-filling compartment. According to the apparatus and the mounting method, the flexible oil-filling belt is arranged and the hollow oil-filling compartments are arranged in the flexible oil-filling belt, so that the flexible oil-filling belt can be filled with the insulating oil; the flexile oil-filling belt is wrapped on the cable accessory after being filled up with the insulating oil; a huge pressure is generated due to explosion when the cable accessory has a fault, so that a side wall of the flexible oil-filling belt close to the cable accessory is broken; an generated electric arc can be extinguished after the insulating oil is released, so that a fire accident is avoided; the flexible oil-filling belt in the apparatus can be deformed under the action of the explosion to improve the explosion-proof effect; and the flexible oil-filling belt can be deformed and is suitable for performing explosion prevention in a narrow and small environment or at special parts such as a part irregular in shape and the like.

Description

【Technical field】 [0001] The invention relates to the field of explosion-proof cable accessories, in particular to a flexible cable accessory explosion-proof device and an installation method. 【Background technique】 [0002] With the continuous development of China's economy, the demand for electricity from industry and urban residents is also increasing day by day. Driven by this demand, China's power construction has developed rapidly and the scale of the power grid has continued to expand. However, on the other hand, the contradiction between the continuous expansion of the power grid and the increasingly scarce land resources is becoming more and more prominent. At the same time, for the beauty and construction of the city, it also poses a challenge to the extensive construction of overhead transmission lines in the last century. In addition, the transmission line is changed underground, which avoids the influence of environmental factors on the line and increases the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G15/20H02G1/02
CPCH02G1/02H02G15/20
Inventor 金海云李禹锋聂诗超李志伟高乃奎
Owner XI AN JIAOTONG UNIV
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