CN206112073U - Tooth type gasket - Google Patents

Abstract

The utility model relates to a tooth type gasket, including annular gasket body, endocentric profile of tooth slot has all been seted up to the sealed face in both sides about the gasket body, and the profile of tooth grooved surface of these both sides has still covered non - metal seal layer, its characterized in that: the outside protruding then structure that inwards falls after rise gradually to both sides in the middle of from top to bottom the profile of tooth slot of both sides is all set to, thus make the protruding arc structure that the gasket body is thick in the middle of direction of radius's cross -section is, both sides are thin compares with prior art, the utility model has the advantages of the profile of tooth slot is all set middle outside arch to then is inwards fallen after rise gradually to both sides for profile of tooth slot and flange are the contact of gradual change formula, and the tooth type gasket piece is when using like this, and the concentric tooth that is located sealed face mid portion can play sealed effect earlier, and only needs lower pretension pressure, in addition when flange surface irregularities, and pressing gasket again, letting originally not, the concentric profile of tooth slot of atress (or lacking atress) also plays the effect of sealing.

Description

A kind of dentiform gasket

Technical field

This utility model is related to a kind of pad, more particularly to a kind of profile of tooth Composition spacer.

Background technology

Flange connection is that a kind of container, pipeline, valve of being usually used in is detachably connected mode, and pad is wherein important Potted component, the quality of its performance directly influences the sealing reliability of flange connection.And traditional pad such as rubber sheet gasket, Wound gasket lamp exist easily fall apart, easy conquassation and the defect such as pre-pressing force is higher, it is difficult to meet the various demands of commercial Application.Separately Outward, in the market also a kind of sealing surface is zigzag metal serrated gasket, and concentric zigzag grooved metal gasket can be provided Effectively seal, as needed the soft graphite of surface re-binding, tetrafluoro, the material of Muscovitum etc., to improve sealing effectiveness.But pass The metal serrated gasket of system, concentric profile of tooth circle is typically opened in both sides and is on flat metal flat, such metal gasket Piece can play preferable sealing function when flange face is smooth, but in flange face out-of-flatness, the metallic gasket has then been difficult to To the effect of preferable compensation sealing.

The content of the invention

Technical problem to be solved in the utility model be for above-mentioned state of the art and one kind is provided can be effectively right Flange plays the dentiform gasket of compensation sealing effect.

This utility model solve the technical scheme that adopted of above-mentioned technical problem for：The dentiform gasket, including the pad of ring-type Body, the upper and lower both sides sealing face of the shim body offers concentric profile of tooth groove, and the profile of tooth flute surfaces of the both sides It is also covered with nonmetallic sealant, it is characterised in that：The profile of tooth groove of the upper and lower both sides is all provided with being set to middle outwardly convex right The structure that backward both sides are gradually inwardly fallen after rise, so that the shim body is in thick middle, both sides in the section of radial direction Thin convex arc shaped structure.

Further, the nonmetallic sealant is graphite, Muscovitum or politef.The nonmetallic sealant can be given Give shim body preferably ductility, additionally it is possible to bear serious flatulence of heat type so that the shim body can adapt to greater strength High temperature and high pressure environment, avoids damaging the surface of flange in high pressure occasion while reaching good sealing effectiveness.

Preferably, the angle α scope of the profile of tooth groove is 85 °～90 °.Due to the state that grooved metal gasket is acted in high pressure Under, can jointly play anti-extrusion effect with the concentric teeth positioned at sealing surface mid portion, its angle be preferably 70 °～ 90 °, the angle can be effectively ensured with preferably anti-extrusion ability.

Compared with prior art, the utility model has the advantage of profile of tooth groove be all provided with being set to middle outwardly convex then to Gradually inwardly fall after rise on both sides so that profile of tooth groove is contacted with flange in gradual change type, such grooved metal gasket when in use, positioned at sealing The concentric teeth of face mid portion can first play sealing function, and only need to relatively low preload pressure, be effectively reduced pad peace Workload during dress；In addition when flange surface out-of-flatness, can compress gasket again, allow the same of original non-stress (or few stress) Heart profile of tooth groove also seals, with compensation sealing effect it is strong the characteristics of.

Description of the drawings

Fig. 1 is the structural representation of this utility model embodiment.

Specific embodiment

This utility model is described in further detail below in conjunction with accompanying drawing embodiment.

As shown in figure 1, dentiform gasket includes the shim body 1 of ring-type, shim body is offered in both sides sealing face 2 about 1 Concentric profile of tooth groove 3, the profile of tooth groove 3 of upper and lower both sides is all provided with being set to middle outwardly convex and then gradually inwardly falls after rise to both sides Structure so that shim body 1 in the section of radial direction in the thin convex arc shaped structure in thick middle, both sides, and the both sides The surface of profile of tooth groove 3 be also covered with graphite, graphite has good ductility, additionally it is possible to bear serious flatulence of heat type so that should Shim body 1 can adapt to the high temperature and high pressure environment of greater strength, avoid in high-voltage field while reaching good sealing effectiveness The surface of flange is damaged in conjunction.The angle α scope of profile of tooth groove 3 is 90 ° in the present embodiment, and the angle can be protected effectively Card has preferably anti-extrusion ability, and profile of tooth groove 3 is all provided with being set to middle outwardly convex and then gradually inwardly returns to both sides Fall so that profile of tooth groove 3 is contacted with flange in gradual change type, such grooved metal gasket when in use, positioned at the mid portion of sealing surface 2 Concentric teeth can first play sealing function, and only need to relatively low preload pressure, the workload being effectively reduced when pad is installed； In addition when flange surface out-of-flatness, can compress gasket again, allow the concentric profile of tooth groove 3 of original non-stress (or few stress) Seal.

Claims (2)

1. a kind of shim body (1) of dentiform gasket, including ring-type, the shim body (1) opens up in both sides sealing face (2) up and down There is concentric profile of tooth groove (3), and profile of tooth groove (3) surface of the both sides is also covered with nonmetallic sealant (4), its feature exists In：The profile of tooth groove (3) of the upper and lower both sides is all provided with the structure for being set to middle outwardly convex and then gradually inwardly falling after rise to both sides, So that the shim body (1) in the section of radial direction in the thin convex arc shaped structure in thick middle, both sides.

2. dentiform gasket according to claim 1, it is characterised in that：The angle α scope of the profile of tooth groove (3) be 85 °～ 90°。