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Seal gasket for flange face sealing

A sealing gasket and flange surface technology, which is applied in the direction of flange connections, pipes/pipe joints/fittings, passing components, etc., can solve problems such as weak resistance to pressure and temperature fluctuations, reduced sealing effect, and strain fatigue. Achieve the effects of not being prone to strain fatigue and creep relaxation, good sealing flexibility and strong resistance

Inactive Publication Date: 2012-06-27
SUZHOU BMC SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]In the prior art, the gaskets used for flange surface sealing are generally metal wound gaskets or non-metallic flat gaskets, both of which rely on the method The bolts between the flanges are locked to provide the necessary sealing specific pressure of the gasket. Therefore, the resistance of these two gaskets to pressure and temperature fluctuations is not strong, and they are prone to strain fatigue and creep relaxation, which will reduce the sealing effect. or failure

Method used

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  • Seal gasket for flange face sealing
  • Seal gasket for flange face sealing
  • Seal gasket for flange face sealing

Examples

Experimental program
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Effect test

Embodiment 1

[0024] see Figure 1 to Figure 4 , The sealing gasket according to this embodiment is composed of a metal inner ring 1 , a metal outer ring 3 and a non-metallic sealing ring 2 embedded between the metal inner ring 1 and the metal outer ring 3 . Among them, the metal inner ring 1 and the metal outer ring 3 are made of the same metal, and the optional materials include carbon steel, stainless steel, copper, aluminum, Monel alloy, nickel and titanium, etc., and the non-metal sealing ring 2 The material can be graphite, mica or polytetrafluoroethylene. When making the sealing gasket of this embodiment, the non-metallic sealing ring 2 can be embedded between the metal inner ring 1 and the metal outer ring 3 in various ways (such as knocking, etc.), so that the non-metallic sealing ring 2 and the metal inner ring 1 and the metal The outer rings 3 are closely connected or offset. The axial thickness of the metal inner ring 1

[0025] When installing the sealing gasket in this ...

Embodiment 2

[0027] The sealing gasket of this embodiment is the same as that of the sealing gasket of Embodiment 1, the difference is that the upper and lower parts of the metal outer ring 3 of the sealing gasket of this embodiment are formed on the side close to the non-metallic sealing ring 2 The step 30 is set according to the fact that both the upper and lower flange surfaces have grooves, so that the steps 30 can be respectively stuck in the grooves of the two flange surfaces, and can be used no matter when installing or when the pressure changes. Improves the stability of gasket fixation.

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Abstract

The invention relates to an inner metal ring, an outer metal ring and a nonmetal seal ring inlaid between the inner metal ring and the outer metal ring. The axial thickness of the inner metal ring is smaller than that of the nonmetal seal ring, and the axial thickness of the outer metal ring is smaller than or equal to that of the nonmetal seal ring. When the seal gasket is mounted, sealing is achieved through face contact between the nonmetal seal ring and a flange. When pressure of a seal medium is increased, the inner metal ring can be stressed to radially expand to extrude the nonmetal seal ring, so that sealing specific pressure of the nonmetal seal ring and the flange face is increased, and sealing is better. In addition, when the pressure of the seal medium is decreased, the inner metal ring shrinks, and the sealing specific pressure restores. Therefore, the seal gasket is higher in resistance to pressure and temperature fluctuation, better in sealing flexibility, and less prone to strain fatigue and creep relaxation.

Description

technical field [0001] The invention relates to a sealing gasket used for flange surface sealing. Background technique [0002] In the prior art, the sealing gaskets used for flange surface sealing are generally metal wound gaskets or non-metallic flat gaskets, both of which rely on the bolt locking between flanges to provide the necessary sealing ratio of the gasket. Therefore, these two gaskets are not strong in resisting pressure and temperature fluctuations, and are prone to strain fatigue and creep relaxation, which will reduce or fail the sealing effect. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a sealing gasket for flange surface sealing with strong ability to resist temperature and pressure fluctuations and better sealing performance. [0004] In order to solve the above technical problems, the present invention takes the following technical solutions:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L23/18
Inventor 侯敏毛华平马志刚
Owner SUZHOU BMC SEALING TECH CO LTD
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