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Sealing and connecting structure of flange

A connection structure and flange technology, which is used in flange connection, engine sealing, pipe/pipe joint/pipe fittings, etc., can solve the problems of large flange volume, increased manufacturing cost, large space, etc. The effect of reducing the pressure area and reducing the cost of manufacturing and maintenance

Active Publication Date: 2012-12-19
SHANGHAI KARON VALVES MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing surface of the existing structure needs precision machining, one stud needs to be equipped with two nuts, and it takes up a lot of space, and the volume of the flange is large, resulting in an increase in the entire manufacturing cost

Method used

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  • Sealing and connecting structure of flange
  • Sealing and connecting structure of flange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Such as figure 2 As shown, the flange sealing connection structure provided by the present invention includes an upper flange 2 , a lower flange 5 , screws 4 , rubber plugs 1 , and rubber rings 3 .

[0017] On the flange of the upper flange 2, there are evenly distributed cylindrical countersunk screw holes, and the screws 4 are hidden in them. At the same time, the distribution position of the screws 4 is the shortest from the inner cavity of the flange, and the pressure-bearing area of ​​the flange is reduced, reducing the number of screws. diameter and dimensions. The bottom of the upper flange 2 is cast into a ring of sealing grooves, which does not require precision machining and reduces the requirements for machining and assembly. A threaded blind hole is provided on the flange of the lower flange 5, and the bottom of the screw is isolated from the external environment. The screw 4 is a hexagon socket head screw, one end of which is a cylindrical countersunk he...

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PUM

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Abstract

The invention relates to a sealing and connecting structure of a flange, which comprises a rubber stopper, an upper flange, a rubber ring, a screw and a lower flange, wherein the rubber ring is arranged between the upper flange and the lower flange, the screw is embedded in the upper flange and connected with the lower flange after penetrating the rubber ring, and the rubber ring is arranged at the top of the screw on a lug of the upper flange. Compared with the prior art, the invention has the advantages of rust and corrosion prevention, repeated use, low manufacture and maintenance cost, small appearance size and the like.

Description

technical field [0001] The invention relates to flanges, in particular to a flange sealing connection structure. Background technique [0002] Flange is a sealing connection structure commonly used for pipes and valves. In the existing flange structure, a gasket is clamped on a pair of flange sealing surfaces by using fasteners such as studs, see figure 1 . Fasteners such as studs in the existing structure pass through the through hole of the flange flange, and the two ends are exposed to the outside. In the humid and corrosive surrounding environment such as buried underground and inspection well, it is easy to rust, causing difficult Disassemble. Most of the gaskets in the existing structure are non-metallic materials such as asbestos rubber sheets, which cannot be reused after being forced to squeeze the flange sealing surface and disassembled again. The existing structure requires high parallelism and concentricity of a pair of sealing surfaces during assembly, and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L23/032F16J15/10F16L23/18
Inventor 韩安伟李政宏
Owner SHANGHAI KARON VALVES MACHINERY
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