CN201038647Y - Double seal members for gas insulated combined switch door - Google Patents

Abstract

The utility model relates to a high-performance and long-lifetime sealing unit used in a GIS(Gas Insulating Composite Switch) pan-door with waterproof and mist-proof sealing effect of a GIS box under severe damp environment. The utility model is mainly characterized in that the sealing unit takes a capital latter Z shape and is matched with the buckled edge of the pan-door. After rotating leftward for 90 degrees, the sealing unit is pressed between the pan-door buckled edge and the box body. The tail part of the capital latter Z shape is pressed onto the buckled edge of the pan-door. The bottom part of the capital latter Z shape has two protruded parts. When the pan-door is buckled, the two protruded parts are pressed onto the box body. The tail part of the capital latter Z shape has an arc end part which is affixed onto the buckled edge. The buckled edge of the pan-door and the sealing unit jointly form two waterproof and mist-proof structures, effectively preventing the rain water and mist water from immersing into the GIS box with fine control on the dewing situation inside the box body. Therefore, the utility model eliminates the unsafe hidden problems thereafter caused such as circuit breakage inside the electric box, direct current grounding and situation endangering the normal work of a power supply system.

Description

Gas-insulated unit switch Pan Men double seal

Technical field

The utility model relates to a kind of seal, relates in particular to the sealing of a kind of GIS of being used for (gas-insulated unit switch) Pan Men, can adapt to outdoor bad weather environment, and effectively waterproof is antifog.

Background technology

Along with the raising of domestic power industry to electric equipment fail safe and ease for maintenance requirement, outdoor GIS (gas-insulated unit switch) has obtained use more and more widely at home.But no matter be import GIS or homemade GIS, after through long-time the use, GIS switch operating case or relevant electrical outdoor gas tank conventional seals tape performance can descend thereupon, its direct result of bringing is to be prone to the phenomenon of soaking in rainwater or the fog in dish case content, especially in the area of bad weather, more be prone to this kind situation.And relatively stable for holding temperature in the GIS dish case all is equipped with automatic heating device.Like this, in the season of such cold in winter, temperature difference inside and outside the dish case is bigger, exist the phenomenon of soaking in the rainwater fog again, make in the switch operating case or relevant electrical outdoor gas tank is easy to occur knot mist phenomenon, thereby cause the fault of DC earthing, cause the tripping or the malfunction of switch easily, bring threat for power supply-distribution system stable operation.

Former GIS Pan Men design as shown in Figure 1.The sealing principle of this GIS Pan Men is: design a caulking gum 4 on drip molding 2 next doors, be used for preventing that the rainwater fog from entering.This design is in the area of drying, and the GIS initial stage of putting into operation can be finished the function of sealing preferably.Yet under the condition of or the humid environment that mist is many more at rainwater, drip molding 2 easily long-pending full waters, in the infiltration casing, add that caulking gum is breaking through long-time use back is easily aging, the rainwater fog is easier entering in the casing just, cause faults such as electric short circuit, DC earthing, produce serious hidden danger for electric power system safety.

Summary of the invention

Sealing Technology deficiency at existing GIS dish case, the utility model provides a kind of rainproof antifog seal of the high performance and long service life of using out of doors, be applicable to the GIS sealing under the more abominable wet environment, can effectively stop ponding and infiltrate, harmful effects such as the interior dewfall of GIS dish case.

For realizing above purpose, the button limit of GIS Pan Men now, the periphery of drip molding has designed a kind of insulated enclosure adhesive tape: two tongues in adhesive tape top, form double layer screen, prevent that effectively the rainwater fog that brings because of the tank surface out-of-flatness from infiltrating; The arc design is adopted in one side outer end, is beneficial to storm-water drainage, and is practical and attractive; The design of its inner rim angle of bend is consistent with GIS dish knocker limit fully, and bonding with industrial glue, prevents that fully outside rainwater and fog from entering; The inboard, button limit of bearing circle door on drip molding, prolonging increases and the corresponding sealing bumper rubber in inside edge, to substitute original seal fully.The material of the above adhesive tape (bar) all adopts easy processing, good airproof performance, the soft entity rubber that hydrophobicity is strong.Concrete profile is as follows:

This insulation double seal is " second " font, and is complementary with dish knocker limit, is pressed in behind the Rotate Left between dish knocker limit and the casing, above the dish knocker limit that the afterbody of this " second " word is pressed.

The bottom of " second " word insulation double seal is provided with two projectioies, and fashionable these two projectioies of dish knocker are squeezed on the casing.

Afterbody in " second " word insulation double seal has a curved end, is attached on the dish knocker limit.

After using the utility model technology, by the use of this insulation double seal, the sealing property of outdoor GIS control box obviously is improved, and can adapt to various atrocious weathers, and waterproof is antifog effectively, has prevented the generation of DC ground fault.

Description of drawings

Fig. 1 is the sealed structural representation of original GIS control box

Fig. 2 is the utility model GIS Pan Men double seal schematic diagram

Fig. 3 is the utility model GIS Pan Men double seal specific embodiment section of structure

The drawing reference numeral explanation:

1, GIS casing 2, drip molding 3, dish knocker limit 4, caulking gum 5, internal recess

6, special-shaped arc outer end 7, the button limit inner seal buffering adhesive tape 8, the double containment tongue that prolong

Embodiment

Gas-insulated unit switch double seal described in the utility model, principal character are, " second " font insulation double seal of a Rotate Right of design between GIS casing 1 and dish knocker limit 3.

As Fig. 2 and shown in Figure 3, this " second " font insulation double seal below is provided with two and convexes to form double containment tongue 8, prevent that effectively the rainwater fog that brings because of the tank surface out-of-flatness from infiltrating, utilize the squeezing action of two projectioies simultaneously, cause the natural enlargement deformation of seal rubber, sealing effectiveness is more good; Its opposite side outer end is designed to arc, forms a special-shaped arc outer end 6, is beneficial to the rainwater fog and outwards discharges, and is difficult for infiltrating casing; Its inner rim is designed to special internal recess 5, and angle of bend design matches with GIS dish knocker limit 3 fully, handles through antirust, anti-corrosive, and glues together with industrial glue, salablely substantially stops entering of rainwater fog.More than design 5,6,8 and form the antifog sealing of the first road waterproof.The rainwater fog that prevents the overwhelming majority infiltrates drip molding.Coiling 3 inboards, knocker limit at last, the periphery of drip molding 2, prolongation increases and the corresponding sealing bumper rubber 7 in button inside edge, limit, forms the antifog sealing of the second road waterproof, in order to prevent the possibility of the low amounts of water infiltration casing in the drip molding.

Claims (3)

1. gas-insulated unit switch Pan Men double seal, it is characterized in that: the sealing part is " second " font, and is complementary with dish knocker limit, is pressed in behind the Rotate Left between dish knocker limit and the casing, above the dish knocker limit that afterbody that should " second " word is pressed.

2. gas-insulated unit switch Pan Men double seal as claimed in claim 1 is characterized in that: the bottom of described " second " word is provided with two projectioies, and fashionable these two projectioies of dish knocker are squeezed on the casing.

3. gas-insulated unit switch Pan Men double seal as claimed in claim 1 or 2 is characterized in that: the afterbody of described " second " word has a curved end, is attached on the dish knocker limit.

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