CN207437763U - Outer shroud type Metallic Spiral Wound Gasket - Google Patents

Abstract

The utility model provides a kind of outer shroud type Metallic Spiral Wound Gasket, it includes shim body and the outer shroud being wrapped in around body, institute's body is the annular ring being entwined by metal tape and filling tape alternation, the edge of the outer shroud is equipped with edge sealing, sealing surface centering is helped with flange contact, rubber seal is studded on the edge sealing, is contacted with the groove surface of flange, sealing ring and flange groove surface are adjacent to and play the role of double containment when two flange screws.This gasket positive and negative structure is identical.

Description

Outer shroud type Metallic Spiral Wound Gasket

Technical field

The utility model is related to a kind of gasket seal, the outer ring-like metal wound gasket of more particularly to a kind of boss flange Piece.

Background technology

SW with outside ring, as imported unit enters domestic market, is obtained for from the 1970s in every field It is widely applied.There are four types of types for common SW with outside ring：Basic model, annular, Section of Outer Ring Line, internal/external ring type.Gasket one As design is all processed according to the classification of the size of flange, general boss face flange is optional outer ring-like and interior with face-flange It is outer ring-like；The optional basic model of male and female flange and inner ring type；Tongue and groove flange and the optional basic model of concave plane flange；Trapezoidal faces method It is blue optional outer ring-like.

Nowadays the most of all simply once sealings, and the working position of gasket through a long time of SW with outside ring in the market Putting can shift no longer between two parties, thus can often replace gasket, time-consuming and laborious, influence efficiency.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, adapt to real needs, provide one kind, double-deck close Envelope, the SW with outside ring of stable structure.

In order to realize the utility model aim, the utility model employs following technical solution：

A kind of boss flange outer shroud type Metallic Spiral Wound Gasket is designed, it includes shim body and is wrapped in around body Outer shroud；Institute's body is the annular ring being entwined by metal tape and filling tape alternation, and the edge of the outer shroud is equipped with edge sealing, with method Orchid contact helps sealing surface centering, studs with rubber seal on the edge sealing, is contacted with the groove surface of flange, when two flange screws When sealing ring and flange groove surface be adjacent to and play the role of double containment.This gasket positive and negative structure is identical.

Preferably, the body is into V-shaped by the metal tapes such as metal wave belt and asbestos, politef, soft graphite Alternating is entwined.

Preferably, described to be equipped with edge sealing outside, size is designed according to the size of boss face flange.

Preferably, nonmetallic sealing ring is studded on the edge sealing.

The beneficial effects of the utility model are；The utility model is prevented by setting edge sealing on the outer shroud of gasket Pads placement shifts during use, is bonded gasket flange tighter more secured, sets sealing ring on edge sealing in addition This design can not only prevent contacting directly and then reduce abrasion and increasing service life for gasket and flange, moreover it is possible to play secondary The effect of sealing substantially increases the leakproofness of whole system.

Description of the drawings

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is the top view of the utility model；

Fig. 3 is the diagrammatic cross-section of the utility model；

Fig. 4 is the utility model and flange cooperation schematic diagram；

In figure：1 body；2 outer shrouds；3 edge sealing；4 sealing rings；5 boss face flanges；11 filling tapes；12 metal tapes；In 31 edge sealing Face；51 flange faces；52 flange groove surfaces；53 flange plateau sidewalls.

Specific embodiment

The utility model is described in detail below in conjunction with the accompanying drawings：

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and specifically The technical solution of the utility model embodiment is clearly and completely described in embodiment.Obviously, described embodiment It is the part of the embodiment rather than whole embodiments of the utility model.Based on the embodiment of described the utility model, sheet Field technology personnel's all other embodiments obtained shall fall within the protection scope of the present invention.

Referring to figs. 1 to Fig. 4, outer shroud type Metallic Spiral Wound Gasket, it includes shim body (1) and is wrapped in outer around body Ring (2), the annular ring that the body (1) is alternately entwined by metal tape (11) and filling tape (12), the edge of the outer shroud Equipped with edge sealing (3), sealing surface centering is helped with flange contact, rubber seal (4) is studded on the edge sealing (3), with flange Groove surface contacts, and when two flange screws, sealing ring (4) and flange groove surface (52) are adjacent to and play the role of double containment；In actual peace During dress, gasket and flange surface are cleaned out first, it is impossible to have greasy dirt, impurity etc., then by the one side and method of gasket Blue face (51) fitting, then paste and the edge sealing inner face (31) of gasket just agrees with the convex side wall of flange (53) in the process, make gasket with Flange is fixed on same center line, and then again by the side wall (53) of another flange and the edge sealing inner face (31) of gasket another side Agree with, such two flange and gasket are just initially fixed on same center line, are finally tightened fixation in progress bolt, are fixed The rubber seal on edge sealing (4) just forms elastic fit with flange groove surface (52) afterwards, and then forms sealing space again, makes Its overall tightness is more preferable, and in addition this design avoids flange and the part of gasket contacts directly, and prevents deformation and the mill of gasket Damage.The design of outer band edge sealing also strengthens the fixation and centering of gasket, effectively prevents the position of gasket in use It shifts.

In conclusion the design is directed to boss face flange, when installation, is more secured, and position does not deviate in use, moreover it is possible to make whole A sealing sealing device more seals.

Above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, those of ordinary skill in the art couple Other modifications or equivalent substitution that the technical solution of the utility model is made, without departing from technical solutions of the utility model Spirit and scope should all cover among the right of the utility model.

Claims (2)

1. outer shroud type Metallic Spiral Wound Gasket, it is characterised in that：Including shim body（1）And the outer shroud being wrapped in around body（2）, Institute's body（1）It is the annular ring being entwined by metal tape and filling tape alternation, the edge of the outer shroud is equipped with edge sealing（3）, with Flange contact helps sealing surface centering, the edge sealing（3）On stud with rubber seal（4）, contacted with the groove surface of flange, when two Sealing ring during flange screw（4）It is adjacent to flange groove surface and plays the role of double containment, this gasket positive and negative structure is identical.

2. outer shroud type Metallic Spiral Wound Gasket as described in claim 1, it is characterised in that：The body（1）It is by metal waveform Band replaces with metal tapes such as asbestos, politef, soft graphites into V-shaped to be entwined.