CN2485850Y

CN2485850Y - Organic composite wall-through casing for high voltage

Info

Publication number: CN2485850Y
Application number: CN 01220593
Authority: CN
Inventors: 贾传熙
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-30
Filing date: 2001-03-30
Publication date: 2002-04-10
Anticipated expiration: 2011-03-30

Abstract

The utility model relates to a high voltage wall-through bushing that is used between service entrance switch and indoor switch in 35KV-220KV grid. Inside of the stainless pipe is provided with a high voltage electricity conductive pole whose two ends are provided with an earth terminal respectively. The outside round table of the stainless steel pipe is wrapped by integrated insulating layer that corresponds with rated voltage and whose thickness is even. The integrated insulating layer is wrapped by small-screen dual-spiral layer whose thickness is even, an earth screen is embedded inside the small screen dual-spiral layer whose two ends is provided with insulating heat-shrink tubes which is wrapped by a silastic skirts. The ektexine of the middle part of the bushing is provided with a fixed flange that is connected with the earth screen. The two ends of the stainless pipe are provided with a pressure equalizing cover, the two ends of the silastic skirts are embedded in the pressure equalizing cover. The utility model has the advantages of screen-slide proof, screen-break screen proof and leakage proof, small size, light weight, easy to be manufactured, stable performance, reliable operation and simple to be repair.

Description

Novel organic composite high pressure wall bushing

The utility model relates to the high-voltage wall bushing that a kind of 35KV-220KV electrical network house lead in and indoor switch are used.

At present, in China's high-voltage fence, generally adopt traditional porcelain sleeve pipe, but it exists difficulty of processing big, the cost height, quality is big, and volume is big, safeguards shortcomings such as inconvenience.For head it off, a kind of plastic wall sleeve pipe of the employing that has now, as shown in Figure 1.It comprises binding post (not drawing among the figure), high pressure conducting rod 1., stainless steel tube 2., aluminium platinum widescreen 3., poly-tetrafluoro hold at interval layer 7., shield 5., the silicon rubber skirt 4., grading shield (not drawing among the figure) and mounting flange 6..Stainless steel tube is 2. outer to hold semiconductor tape, and semiconductor tape is an alclad platinum because the mode that multilayer holds of successively decreasing, the end screen for the ground screen 5., it is cone that sleeve pipe ground shields to two ends.6. 5. the ground screen be electrically connected with mounting flange, because the internal structure that its taper widescreen multilayer holds, there is the lot of unstable factor, in manufacturing, assembling, handling process, is prone to sliding screen, splits problems such as screen and leakage of oil, particularly in galvanization, under the effect of hot high pressure polarization, make its inner complex media easily produce lateral displacement, internal electric field and insulation balance are damaged, after problem seriously arrives to a certain degree, insulation breakdown must take place, in the serious accident of trouble location blast.

The purpose of this utility model is to overcome above-mentioned shortcoming and designs and a kind ofly sliding screen can not occur, split that stress is subjected to external force to influence minimum novel organic composite high pressure wall bushing between screen and oil leakage phenomenon and screen.

The utility model is achieved in that it comprises binding post, the high pressure conducting rod, stainless steel tube, integrated insulating barrier, smaller screen double helix layer, the ground screen, the oil resistant fluid sealant, isolating shrinkable tube, the silicon rubber skirt, grading shield and mounting flange, be installed with the high pressure conducting rod in the stainless steel tube, each fixes a binding post respectively at the two ends of high pressure conducting rod, be surrounded by on the outer round table surface of stainless steel tube with the rated voltage corresponding thickness and evenly be round table-like integrated insulating barrier, integrated insulating barrier is surrounded by smaller screen double helix layer outward, smaller screen double helix layer comprises smaller screen and poly-Teflon tap, it is round table-like evenly distributed that smaller screen is, it is the poly-Teflon tap that holds with the double helix form at interval, the ground screen connects smaller screen in parallel end screen and draws ground wire, the two ends of smaller screen double helix layer are with the oil resistant fluid sealant, isolating shrinkable tube, smaller screen double helix layer, the outer tight cover silicon rubber skirt of oil resistant fluid sealant and isolating shrinkable tube, the middle part mounting flange of silicon rubber skirt is also realized being electrically connected with ground screen, and each fixes a grading shield respectively at the stainless steel tube two ends.

The utility model compared with prior art has following advantage: therefore (1), because the thickness of integrated insulating barrier and smaller screen double helix layer is even sliding screen can not occur, split problems such as screen and leakage of oil in manufacturing, assembling, handling process; (2), because smaller screen double helix layer adopts aluminium platinum smaller screen and interval double helix to hold poly-Teflon tap, therefore between the screen stress influenced by external force minimum, guaranteed all pressures effect along face, its solid insulation part has further improved the energising reliability of operation, and properties of product and useful life improve greatly; (3), little, in light weight, the easy processing and manufacturing of volume, stable performance, reliable, safeguard simple.

Be elaborated below in conjunction with accompanying drawing.

Fig. 1 is the prior art cutaway view;

Fig. 2 is the utility model cutaway view.

The utility model comprise binding post 1, high pressure conducting rod 12, stainless steel tube 2, integrated insulating barrier 3, smaller screen double helix layer 4, shield 6, oil resistant fluid sealant 7, isolating shrinkable tube 8, silicon rubber skirt 10, grading shield 11 and mounting flange 9, as shown in Figure 2.Be installed with in the stainless steel tube 2 with the corresponding high pressure conducting rod 12 of rated current and with stainless steel tube 2 one end equipotentials and be connected, each fixes a binding post 1 respectively at the two ends of high pressure conducting rod 12.The outer round table surface direct casting of stainless steel tube 2 has the uniform integrated insulating barrier 3 of thickness, integrated insulating barrier 3 two ends are the first aluminium platinum smaller screen, wide is 200 millimeters, is connected with the steel pipe equipotential, wraps the poly-Teflon tap which floor has a small amount of silicone oil then, wrap the second wide smaller screens with the first aluminium platinum smaller screen for 20 millimeters to center distance, so rule is covered with, and when wherein bag extremely shields the position, connects the end screen of two smaller screens with aluminium platinum, as the ground screen, and draw ground wire.The poly-Teflon tap of gentle smaller screen outsourcing on ground is till the Bao Ping.The two ends of smaller screen double helix layer 4 are with oil resistant fluid sealant 7 and isolating shrinkable tube 8 and are locked and are protected; smaller screen double helix layer 4, oil resistant fluid sealant 7 and isolating shrinkable tube 8 outer tight cover silicon rubber skirts 10; establish mounting flange 9 on the middle part outer wall of silicon rubber skirt 10 in ground shields 6 boundaries, mounting flange 9 is realized being electrically connected with ground screen 6.Each fixes a grading shield 11 respectively at stainless steel tube 2 two ends.

Claims

1, a kind of novel organic composite high pressure wall bushing, it comprises binding post (1), high pressure conducting rod (12), stainless steel tube (2), integrated insulating barrier (3), smaller screen double helix layer (4), ground screen (6), oil resistant fluid sealant (7), isolating shrinkable tube (8), silicon rubber skirt (10), grading shield (11) and mounting flange (9), be installed with high pressure conducting rod (12) in the stainless steel tube (2), each fixes a binding post (1) respectively at the two ends of high pressure conducting rod (12), be surrounded by on the outer round table surface of stainless steel tube (2) with the rated voltage corresponding thickness and evenly be round table-like integrated insulating barrier (3), the outer smaller screen double helix layer (4) that is surrounded by of integrated insulating barrier (3), smaller screen double helix layer (4) comprises smaller screen and poly-Teflon tap, it is round table-like evenly distributed that smaller screen is, it is the poly-Teflon tap that holds with the double helix form at interval, ground screen (6) connects smaller screen in parallel (5) end screen and draws ground wire, the two ends of smaller screen double helix layer are with oil resistant fluid sealant (7) and isolating shrinkable tube (8), smaller screen double helix layer (4), the outer tight cover silicon rubber skirt (10) of oil resistant fluid sealant (7) and isolating shrinkable tube (8), the fixing flange (9) that is electrically connected with ground screen realization in the middle part of silicon rubber skirt (10), each fixes a grading shield (11) respectively at stainless steel tube (2) two ends.

2, wall bushing according to claim 1 is characterized in that: smaller screen double helix layer (4) for aluminium platinum smaller screen and at interval double helix hold poly-tetrafluoro and integrated insulation (3), the triangular compound mode of stainless steel tube (2).