CN203248869U - High-pressure flange seal - Google Patents
High-pressure flange seal Download PDFInfo
- Publication number
- CN203248869U CN203248869U CN 201320141489 CN201320141489U CN203248869U CN 203248869 U CN203248869 U CN 203248869U CN 201320141489 CN201320141489 CN 201320141489 CN 201320141489 U CN201320141489 U CN 201320141489U CN 203248869 U CN203248869 U CN 203248869U
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- Prior art keywords
- flange
- pressure
- sealing
- welding heads
- seal
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- Expired - Fee Related
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- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Gasket Seals (AREA)
Abstract
The utility model provides a high-pressure flange seal. In the actual field using process of all existing high-pressure flanges, the phenomenon that leakage occurs when the high-pressure flanges carry out pressure reduction often occurs, interface leakage mainly occurs, namely, leakage occurs to the contact position of a seal and a boss working face, and sealing gaskets need to be replaced after general high-pressure flanges are used for one to two years. The high-pressure flange seal comprises a pair of flange welding heads and movable flange clamps arranged on the flange welding heads, bolt mounting holes are formed in the movable flange clamps, a metal winding gasket with inner and outer reinforcing rings is arranged between the flange welding heads, a set of annular grooves is formed in the end faces of the flange welding heads, and the depth of the annular grooves is equal to half of the compression amount of the metal winding gasket. The high-pressure flange seal is used for sealing the high-pressure flanges.
Description
Technical field:
The utility model relates to a kind of flange sealing structure, is specifically related to a kind of high pressure flange sealing.
Background technique:
Flange is that pipe and pipe are reached and the interconnective part of valve, is connected in pipe end.Flange connects, and refers to interconnect releasable connection as one group of combined sealing structure by flange, pad and bolt three, and perforation on the flange, bolt are close to two flanges.Seal with liner between flange.High pressure flange refers to be higher than the pipeline of 10MPa or the flange of equipment connection for pressure.
Through looking into the design processing criterion of various high pressure flanges, such as DIN2628, its end face boss working surface roughness is 25 microns, and flange seal mainly is to make pad produce plastic deformation by bolt fastening, thereby small uneven of filling up boss face plays sealing effect.But in the actual using process, the phenomenon that high pressure flange leaks often occurs when suppressing at the scene, it is mainly boundary leakage and namely seals and the leakage of boss working surface contacting point, and general high pressure flange uses will change sealing gasket in one to two year.
Chinese patent CN200810137360.0 discloses a kind of " gasket-free sealing flange and encapsulating method ", it becomes the line contact with existing contact, obtain the initial sealing specific pressure by bolt force, during work because the effect of pressure medium, the sealed mouth back side can produce axial pressure, working seal is increased than the pressure with medium, reach the purpose of sealing.But its processing and installation precision are had relatively high expectations, and especially the distortion during flange welding can not guarantee the parallelism of two sealing planes, and bolton to which kind of degree can't quantize, and namely bolt can not too tightly again can not be too loose.
The model utility content:
The purpose of this utility model provides the sealing of a kind of high pressure flange, and is simple in structure, anti-leak result good, long service life.
Above-mentioned purpose realizes by following technological scheme:
The high pressure flange sealing, the Mobile flange that comprises a pair of flange welding head and be installed on the flange welding head presss from both sides, has bolt mounting holes on the described Mobile flange folder, metal wound gasket with inside and outside stiffening ring is installed between the described flange welding head, the end face of described flange welding head has one group of annular groove, and the described annular groove degree of depth equals half of decrement of metal wound gasket.
Described high pressure flange sealing, the sectional shape of described annular groove is zigzag fashion or triangle or trapezoidal or rectangle.
Beneficial effect:
Flange is by after the bolton, the sealing position of metal wound gasket is extruded in the groove and moulding, increased the sealing contact surface area, and make sealing contact surface become zigzag fashion (or triangle, trapezoidal, rectangle etc.) by straight line shape, even if the pressure medium that a little is arranged by the plane to exosmosis, medium will be cut off to inboard first groove, play good sealing effect, prolong the flange life-span.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Among the figure: the 1-banjo clip; The 2-metal wound gasket; The 3-soldered splice; The 4-bolt hole.
Embodiment:
As shown in Figure 1: high pressure flange of the present utility model seals, and comprises metal wound gasket 2 and the soldered splice 3 of outer annular-stiffer in Mobile flange folder 1, the band, uniform several bolts hole 4 on the Mobile flange folder 1; For the ease of metal wound gasket 2 is installed, the gap between the soldered splice 3 is slightly larger than the thickness of metal wound gasket 3; Equally, for the ease of changing metal wound gasket 2, the annular groove degree of depth on the soldered splice 3 equals half of decrement of metal wound gasket 3.The Mobile flange folder 1 fastening soldered splice 3 extrusion metal wound gaskets 2 that make by bolt, the sealing position of metal wound gasket 2 is extruded into groove and moulding, has increased sealing area, prevents dielectric leakage.
Described high pressure flange sealing, the sectional shape of described annular groove is zigzag fashion or triangle or trapezoidal or rectangle.
Claims (2)
1. high pressure flange sealing, the Mobile flange that comprises a pair of flange welding head and be installed on the flange welding head presss from both sides, it is characterized in that: have bolt mounting holes on the described Mobile flange folder, metal wound gasket with inside and outside stiffening ring is installed between the described flange welding head, the end face of described flange welding head has one group of annular groove, and the described annular groove degree of depth equals half of decrement of metal wound gasket.
2. high pressure flange sealing according to claim 1, it is characterized in that: the sectional shape of described annular groove is zigzag fashion or triangle or trapezoidal or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320141489 CN203248869U (en) | 2013-03-27 | 2013-03-27 | High-pressure flange seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320141489 CN203248869U (en) | 2013-03-27 | 2013-03-27 | High-pressure flange seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203248869U true CN203248869U (en) | 2013-10-23 |
Family
ID=49375308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320141489 Expired - Fee Related CN203248869U (en) | 2013-03-27 | 2013-03-27 | High-pressure flange seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203248869U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671918A (en) * | 2013-12-06 | 2014-03-26 | 艾志（南京）环保管接技术股份有限公司 | Tooth-shaped metal gasket with interspersed pressure retaining steps |
| CN104565618A (en) * | 2015-01-27 | 2015-04-29 | 武汉工程大学 | High-temperature flange sealing structure comprising flexible graphite metal omega-shaped tooth composite gasket |
| CN105829780A (en) * | 2013-12-20 | 2016-08-03 | 海底Ip英国有限公司 | Gasket |
-
2013
- 2013-03-27 CN CN 201320141489 patent/CN203248869U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671918A (en) * | 2013-12-06 | 2014-03-26 | 艾志（南京）环保管接技术股份有限公司 | Tooth-shaped metal gasket with interspersed pressure retaining steps |
| CN103671918B (en) * | 2013-12-06 | 2016-05-25 | 艾志（南京）环保管接技术股份有限公司 | A kind of metal serrated gasket of the interspersed rank of only presenting a theatrical performance as the last item on a programme |
| CN105829780A (en) * | 2013-12-20 | 2016-08-03 | 海底Ip英国有限公司 | Gasket |
| CN104565618A (en) * | 2015-01-27 | 2015-04-29 | 武汉工程大学 | High-temperature flange sealing structure comprising flexible graphite metal omega-shaped tooth composite gasket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 |