CN203214871U - Metal composite gasket with circular grooves - Google Patents
Metal composite gasket with circular grooves Download PDFInfo
- Publication number
- CN203214871U CN203214871U CN 201320168015 CN201320168015U CN203214871U CN 203214871 U CN203214871 U CN 203214871U CN 201320168015 CN201320168015 CN 201320168015 CN 201320168015 U CN201320168015 U CN 201320168015U CN 203214871 U CN203214871 U CN 203214871U
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- metal
- layer
- teflon
- gasket
- pad
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- Expired - Lifetime
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Abstract
The utility model discloses a metal composite gasket with circular grooves. The gasket is a circular gasket which is formed by compositing of an outer-layer teflon material and an inner-layer metal material. An outer-layer teflon ring is in a hollow structure to form a semi-wrapping structure with the sealed inner-diameter position and the open outer-diameter position, and the outer-layer teflon ring can wrap an inner-layer metal ring effectively. No less than one concentric circle type circular groove is formed in the inside of the teflon ring and upper and lower planes of the inner-layer metal ring respectively, and concave and convex portions are matched mutually. The gasket is in the semi-wrapping structure and is simple to machine, and the teflon layer does not fall under the condition of no adhesive. The inner-diameter position is sealed, so that the metal layer and a medium are separated completely, and the metal layer is not eroded by the medium. During usage of the gasket, the minimum sealing specific pressure of the gasket can be achieved through a small bolt tightening force, and the good sealing is achieved. The gasket can completely substitute for existing teflon metal tooth-shaped composite gaskets and wave-toothed composite gaskets and is high in practicability.
Description
Technical field
The utility model is applicable to the fluid field of sealing technology, especially a kind of circular groove metal composite pad.
Background technique
The metal composite pad typically uses on the flange of corrosion-resistant high voltage bearing pipeline, valve and equipment, uses particularly generally in petrochemical industry.Nonmetallic material in the metal composite pad adopt polytetrafluoroethylmaterial material more, because polytetrafluoroethylmaterial material has better seal performance and superpower decay resistance, but its shortcoming is strength deficiency and creep relaxation easily takes place; It is big that metallic material then has intensity, and the advantage that rebound elasticity is good, but that shortcoming is sealability is not good requires high to flatness and the degree of finish of flanged surface.Use metallic shim, for playing seal action, its pretension specific pressure is bigger, can bring the grade of bolt and flange to raise, and cause user cost to rise significantly, and metallic material is corrosion-resistant relatively poor.The metal composite pad is comprehensive and both advantage then, utilize nonmetallic material such as polytetrafluoroethylmaterial material to contact with flanged surface up and down, and utilize the high strength of the metallic material at center to make polytetrafluoroethylene floor with the flanged surface moment contacts closely up and down with good rebound elasticity, improved sealing effect and the whole gasket strength grade of pad greatly, guaranteed that pad can use under deep-etching and high pressure operating mode.Polytetrafluoroethyl-ne-ne metal profile of tooth composite pad commonly used has at present adopted this principle exactly, polytetrafluoroethylene floor on the upper and lower surface difference of the metal cirque that profile of tooth is arranged is bonding.But this Composition spacer has restricted its extensive use owing to there are two narrow limitation.First narrow limitation is that the cost height is prone to waste product because the parts of tooth processing request height of metal cirque top and bottom causes difficulty of processing big; Second narrow limitation is that teflon has its exclusive characteristics, be exactly that friction factor is extremely low, the adhesive property extreme difference, any binder all can't be effectively bonding firm teflon and metal, even adopted the complex surfaces processing method to improve the tetrafluoroethylene adhesive property, be partly to contact with the crown of tooth profile metal because of the teflon bed course also, area of contact is minimum, adhesive effect is extreme difference still, therefore the polytetrafluoroethylene floor that occurs these Composition spacer top and bottom again and again comes off, and has had a strong impact on installation and the use of this pad.And a kind ofly both processed simple compound firm circular groove metal composite pad and do not see and deliver.
The model utility content
The objective of the invention is to overcome the shortcoming of above-mentioned polytetrafluoroethyl-ne-ne metal profile of tooth composite pad, a kind of simple compound firm circular groove metal composite pad again of processing is provided.
For realizing above purpose, a kind of circular groove metal composite pad, the case lid joint that is installed in pipeline flange or equipment that it is static, and it is relative static with the parts of its two sides contact, the utility model Composition spacer is outer polytetrafluoroethylmaterial material, the inner layer metal material form the ring Composition spacer, two planes up and down of pad inner layer metal annulus respectively are provided with the annular groove that is no less than 1 concentric circle type.The pad skin is the teflon annulus, and annulus is hollow structure, metal cirque is wrapped in it inner radius sealing, outer radius opening.This teflon annulus inside respectively is provided with the annular groove that is no less than 1 concentric circle type in two planes up and down, and its projection section cooperates with the annular groove of metal cirque, and its channel portions then cooperates with the projection section of metal cirque.Because of the sealing of teflon internal radius place, the outer radius opening forms one and half pack arrangements, and is real the metal layer sealed packet, and metal layer can't be contacted with ducted aggressive medium, and the pad of this structure belongs to the Composition spacer of the semi-coating type that does not adopt any binder.When this Composition spacer places between flange, under the screwing force of bolt, polytetrafluoroethylene floor contacts with flanged surface up and down, and under the high resilience that the inner layer metal layer provides, polytetrafluoroethylene floor and flanged surface up and down keep tight contact the at every moment, form effectively sealing.Because the interior metal layer is provided with the multiple tracks circular groove, the area that plays rebound effect at the screwing force lower metal layer of bolt is less, footprint pressure under identical Bolt Tightening Force is bigger, when the minimum seal pressure that just can reach pad with less Bolt Tightening Force, and form good sealing, need not to improve the grade of bolt and flange, save user cost.All be provided with the annular groove of concentric circle type because of metal layer and polytetrafluoroethylene floor, and the groove jog cooperatively interacts, mutual restriction, no matter just can guarantee that the polytetrafluoroethylene floor on pad top layer can not come off, and has increased the reliability of this Composition spacer greatly so need not any binder in the production of pad, transportation, installation and use process.
The beneficial effect of the utility model circular groove metal composite pad is:
1, it is superpower corrosion-resistant: because pad adopts the inner radius sealing, the semi-coating type structure of outer radius opening, polytetrafluoroethylene floor can conveniently and effectively be wrapped in metal layer in it, and metal layer and medium are isolated fully, can not be subjected to the erosion of any aggressive medium, the pad long service life.2, compound firm: because of the semi-coating type structure, and the jog of the annular groove of the concentric circle type of metal layer and polytetrafluoroethylene floor cooperatively interacts, and mutual restriction can not come off so need not the polytetrafluoroethylene floor that any binder just can guarantee the top layer.3, processing is simple, and cost is low: the annular groove processing of the concentric circle type of the polytetrafluoroethylene floor of inner metal layer and outside is simple, the efficient height, and reject rate is low.4, good sealing effect: the annular groove that is provided with the multiple tracks concentric circle type because of the interior metal layer, the area that plays rebound effect at the screwing force lower metal layer of bolt is less, footprint pressure under identical Bolt Tightening Force is bigger, when just reaching the minimum seal pressure of pad with less Bolt Tightening Force, and form good sealing.5, practical: complete alternative existing polytetrafluoroethyl-ne-ne metal profile of tooth composite pad and wave tooth composite gasket.
Description of drawings
Fig. 1 is the utility model circular groove metal composite pad profile schematic representation.
Fig. 2 is the utility model circular groove metal composite pad sectional view.
Fig. 3 is the utility model circular groove metal composite pad assembling schematic representation.
Numbering explanation: 1 circular groove metal composite pad, 2 upper flanges, 3 lower flanges, 4 bolts, 5 metal layers, 6 polytetrafluoroethylene floors.
Embodiment
Consult shown in the accompanying drawing 3, the utility model circular groove metal composite pad 1 places between upper flange 2 and the lower flange 3, and with the flange contact facings maintenance is relative static up and down.Under the screwing force of bolt 4, the outer polytetrafluoroethylene floor 6 of pad is compressed, the annular groove that the multiple tracks concentric circle type is arranged because of interior metal layer 5, its convex portion is applied to spring-back force on the polytetrafluoroethylene floor 6, make polytetrafluoroethylene floor 6 being fitted on the flanged surface tightly, because the area of 5 rebound effects of metal layer only is convex portion, this surface area is also little, its the resilience pressure that imposes on polytetrafluoroethylene floor 6 is then bigger under less Bolt Tightening Force, be easy to just reach the minimum seal pressure of pad, and form good sealing.
The inner radius sealing of polytetrafluoroethylene floor 6, the outer radius opening forms a semi-coating type structure, can conveniently and effectively be wrapped in metal layer 5 in it, and metal layer 5 and pipe interior medium are isolated fully, can not be subjected to the erosion of any aggressive medium.
Pad is the semi-coating type structure, and metal layer 5 channel portions cooperate with polytetrafluoroethylene floor 6 projection sections, metal layer 5 projection sections cooperate with polytetrafluoroethylene floor 6 channel portions, the jog that forms the annular groove of concentric circle type cooperatively interacts, the structure of mutual restriction, polytetrafluoroethylene floor 6 need not to use binder just can with metal layer 5 in conjunction with firm, the phenomenon that polytetrafluoroethylene floor 6 comes off can not take place.
Claims (2)
1. circular groove metal composite pad, the case lid joint that is installed in pipeline flange or equipment that it is static, and relative static with the parts of its two sides contact, it is characterized in that described pad is by the inner layer metal material, outer polytetrafluoroethylmaterial material form the ring Composition spacer; Two planes up and down of pad inner layer metal annulus respectively are provided with the annular groove that is no less than 1 concentric circle type; Outer teflon annulus is hollow structure, metal cirque is wrapped in it inner radius sealing, outer radius opening.
2. according to claim 1 described circular groove metal composite pad, it is characterized in that this teflon annulus inside respectively is provided with the annular groove that is no less than 1 concentric circle type in two planes up and down, teflon annulus projection section cooperates with the annular groove of metal cirque, and teflon ring channel slot part then cooperates with the projection section of metal cirque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320168015 CN203214871U (en) | 2013-04-07 | 2013-04-07 | Metal composite gasket with circular grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320168015 CN203214871U (en) | 2013-04-07 | 2013-04-07 | Metal composite gasket with circular grooves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203214871U true CN203214871U (en) | 2013-09-25 |
Family
ID=49204410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320168015 Expired - Lifetime CN203214871U (en) | 2013-04-07 | 2013-04-07 | Metal composite gasket with circular grooves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203214871U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280987A (en) * | 2014-09-30 | 2015-01-14 | 无锡市新颖密封材料厂 | Teflon gasket containing copper powder |
| CN109356745A (en) * | 2018-12-11 | 2019-02-19 | 广西玉柴机器股份有限公司 | A method of prevent rubber skeleton class gasket fastening bolt torque from decaying |
| CN111365357A (en) * | 2018-12-26 | 2020-07-03 | 施伟 | Combined type superstrong waterproof gasket |
-
2013
- 2013-04-07 CN CN 201320168015 patent/CN203214871U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280987A (en) * | 2014-09-30 | 2015-01-14 | 无锡市新颖密封材料厂 | Teflon gasket containing copper powder |
| CN109356745A (en) * | 2018-12-11 | 2019-02-19 | 广西玉柴机器股份有限公司 | A method of prevent rubber skeleton class gasket fastening bolt torque from decaying |
| CN111365357A (en) * | 2018-12-26 | 2020-07-03 | 施伟 | Combined type superstrong waterproof gasket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |