CN206112067U - Spiral wound gasket - Google Patents

Abstract

The utility model relates to a spiral wound gasket, including the support ring of inner circle, the holding ring and the sealing layer of setting between the two of outer lane, its characterized in that it supports the steel band to be provided with the V type in the sealing layer, the V type supports the steel band and sets up to broadband many V type, and the angle of this V type is 80~85, compare with prior art, the utility model has the advantages of because the V type support steel band that sets up sealing layer between the holding ring of the support ring of spiral wound gasket inner circle and outer lane becomes 80~85 by the improvement of angle 90~95, thereby increased and supported the extension space of steel band at the pressurized in -process, the pressurized stroke has been increased, it is strikeing to prevent to support the steel band, the pressure vibration is easily fallen apart down and is played better sealed effect, the steel band of V type support simultaneously sets up to broadband many V type, the thickness and the width that support the steel band have been adjusted promptly, can carry the bearing capacity of high support steel band greatly, anti deformability and strut the area.

Description

Spiral wound gasket

Technical field

This utility model is related to encapsulant technical field, more particularly to a kind of spiral wound gasket.

Background technology

The currently known metallic packing that can be applied to conventional flange sealing surface form has：Flat metallic gasket, metal Corrugated gasket, metal flute profile pad, metal hollow O V-shaped rings, SW with outside ring etc..But it is strong with upper metallic gasket Standard is sealed, and when temperature and pressure fluctuates larger grade under mal-condition, required preload pressure sealing is relatively difficult to ensure card.Wherein metal Spirotallic gasket is by a kind of semi-metallic gasket of the compound coiling of metal tape and non-metallic spiral, typically by being located at inner ring Support ring, the locating ring of outer ring and winding filling central filler sealing structure between are constituted.Support ring and locating ring Metal material is usually arranged as strengthened resistance to compression by W types or V-type metal coil support, middle filling sealing structure is according to making Can be using graphite or politef with the difference of environment.Such as Patent No. ZL201310220289.3, (notification number is CN103267126B Chinese invention patent)《Spirotallic gasket》Such a spirotallic gasket is disclosed, it is close in politef Supporting steel band is additionally provided between sealing and graphite encapsulation layer packed layer, because two kinds of encapsulants have difference in link position Material behavior, be to ensure that every kind of material effectively plays the performance of its own, the supporting steel band of setting, respectively to poly- four While fluorothene sealant and graphite encapsulation layer play support function, it is ensured that the sealing effectiveness of each sealing layer material.One As for, the supporting steel band is the V-type that angle is 90～95 °, and it has the disadvantage easily to be fallen apart in impact, under pressure vibration, sealing peace Full poor performance.

The content of the invention

Technical problem to be solved in the utility model is to provide a kind of in impact, pressure for above-mentioned state of the art It is difficult to fall apart under force vibration, seals the strong spiral wound gasket of security performance.

This utility model solve the technical scheme that adopted of above-mentioned technical problem for：The spiral wound gasket, including inner ring Support ring, the locating ring of outer ring and the sealant being disposed there between, it is characterised in that V-type is provided with the sealant Support steel band, the V-type supporting steel band is set to many V-types in broadband, and the angle [alpha] of the V-type is 80～85 °.

Further, the sealant is multi-layer sealed between the support ring and the locating ring including being stacked Structure, wherein, including the teflon seal layer near inner ring and the graphite encapsulation layer near outer ring, the politef The V-type supporting steel band is provided between sealant and the graphite encapsulation layer, it is described poly- that the V-type supports steel strip winding to be arranged on On tetrafluoroethene layer outer shroud.The characteristics of there is good resistance to acids and bases using teflon seal layer, in medicines such as chemical industry, pharmacy In the pipeline of liquid after long-term use, it is easy to the cleaning to transfer pipeline, internal layer is arranged on, it is ensured that transfer pipeline herb liquid Safety, meanwhile, using the resistant to elevated temperatures feature of graphite encapsulation layer, be disposed at the outside of graphite encapsulation layer so that after preparation Spirotallic gasket thermostability on the whole improve, while acid-proof alkaline is ensured, it is ensured that easy to clean in transfer pipeline Property.

Further, the graphite encapsulation layer is the graphite encapsulation layer that compacting is wound by single carbon shoe.Wound gasket Piece be with certain thickness thin plate component, and graphite encapsulation layer radially have certain thickness, in order to reduce winding Difficulty of processing in pad preparation process, graphite encapsulation layer is prepared by the way of compacting, i.e., prepare single graphite first The sealing strip of material, is then wound in supporting construction by the compression of from coil to coil, by way of winding, it is ensured that wound after preparation The sealing effectiveness of pad, simplifies preparation technology.

Further, every slice width degree of described V-type supporting steel band is 1.5mm～2mm.Adjust in the broadband of V-type supporting steel band Section, can greatly improve the bearing capacity and non-deformability of supporting steel band.

Preferably, the angle [alpha] of described V-type is 80 °.

Compared with prior art, the utility model has the advantage of due to being arranged on the support ring of spirotallic gasket inner ring and outer The V-type supporting steel band of sealant is modified to 80～85 ° by 90～95 ° of angle between the locating ring of circle, so as to increased support Extension space of the steel band in pressurized process, increases pressurized stroke, prevents supporting steel band from easily falling apart under impact, pressure vibration And play better seal effect, while V-type supporting steel band is set to many V-types in broadband, that is, have adjusted supporting steel band thickness and Width, can greatly improve bearing capacity, non-deformability and the supporting area of supporting steel band.

Description of the drawings

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

Fig. 2 is the I magnified partial views in Fig. 1；

Fig. 3 is the structural representation of supporting steel band in this utility model embodiment.

Specific embodiment

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

As shown in Figures 1 to 3, this spiral wound gasket includes the locating ring 2 of the support ring 1, outer ring of inner ring and is arranged on the two Between sealant, be provided with sealant V-type supporting steel band 3, in order to be able to improve bearing capacity, the resistance to deformation energy of supporting steel band Power and supporting area, are set to the multilamellar wideband structural that winding is arranged, per slice width degree by V-type supporting steel in the present embodiment with 3 For 1.5mm～2mm, while also V-type supporting steel is improved to into 80 ° with 3 V-type angle [alpha] by 90～95 °, so as to increased support Extension space of the steel band in pressurized process, increases pressurized stroke, prevents supporting steel band from easily falling apart under impact, pressure vibration So that spirotallic gasket plays better seal effect.

In the present embodiment, sealant is two-layer sealing structure, including the teflon seal layer 4 and the stone of outer ring of inner ring Black sealant 5, internal layer polytetrafluoroethylene floor is contacted with the medicinal liquid in transfer pipeline, and the graphite encapsulation layer 5 of outer layer ensures wound gasket The good temperature capacity of piece.In order to avoid medicinal liquid is extruded by the end face of spirotallic gasket and transfer pipeline, sealant is set to The multiple structure that winding is arranged, so as to each circle sealing structure of winding can play sealing function, specifically, graphite encapsulation layer 5 include winding arrange multiple structures, graphite encapsulation layer 5 be by single carbon shoe by compacting technique be prepared into it is many The structure of layer winding, is in close contact between each layer, and plays sealing effectiveness by the graphite-structure of multilamellar, it is ensured that transfer pipeline Between sealing effectiveness.In addition, the cross section radially of inner ring support ring 1 has boss supporting construction in the present embodiment, outward The cross section of circle locating ring 2 is set to the locking groove structure compressed with the boss supporting construction sealing of support ring 1, spirotallic gasket For annular flake structure, after arranging the spirotallic gasket of multiple structure, it is still easily transporting and axial direction is being subject in loading process Folding force and produce the phenomenon of mutual dislocation between sealant, entered by arranging the sealant of support ring 1 and locating ring 2 pairs of inside Row is spacing, can to a certain extent improve the non-deformability of spiral wound gasket.

Claims (5)

1. a kind of support ring (1) of spiral wound gasket, including inner ring, the locating ring (2) of outer ring and be disposed there between it is close Sealing, it is characterised in that V-type supporting steel band (3) is provided with the sealant, the V-type supporting steel band (3) is set to broadband Many V-types, the angle [alpha] of the V-type is 80～85 °.

2. spiral wound gasket according to claim 1, it is characterised in that the sealant includes being stacked at described Multi-layer sealing structure between pushing out ring (1) and the locating ring (2), wherein, including the teflon seal layer near inner ring (4) and near the graphite encapsulation layer (5) of outer ring, set between the teflon seal layer (4) and the graphite encapsulation layer (5) The V-type supporting steel band (3) is equipped with, V-type supporting steel band (3) winding is arranged on the polytetrafluoroethylene floor outer shroud.

3. spiral wound gasket according to claim 2, it is characterised in that the graphite encapsulation layer (5) is close by single graphite The graphite encapsulation layer of strip of paper used for sealing winding compacting.

4. spiral wound gasket according to claim 1, it is characterised in that every slice width degree of described V-type supporting steel band (3) For 1.5mm～2mm.

5. spiral wound gasket according to claim 4, it is characterised in that the angle [alpha] of described V-type is 80 °.