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Flanged connection component

A technology for connecting components and flanges, which is applied in the direction of flange connections, pipes/pipe joints/fittings, passing components, etc., which can solve the problems of easy sealing failure, reduce bolt pre-tightening force, etc., to overcome sealing failure and simple structure , Improve the effect of reliability and economy

Active Publication Date: 2014-01-01
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a flange connection assembly to overcome that the flange connection assembly of dissimilar materials with large differences in thermal expansion coefficient is prone to seal failure under high or low temperature conditions and cannot be passed through without ensuring economical efficiency. The method of increasing the number of bolts reduces the problem of bolt pretightening force

Method used

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Embodiment Construction

[0021] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0022] exist figure 1 In the shown embodiment, the flange connection assembly of the present invention includes a circular first flange 1 and a second flange 2, and the first flange 1 and the second flange 2 are relatively a central axis a i Axially aligned and butted against each other by bolts 3 and nuts 4.

[0023] Such as figure 1 As shown, the first flange 1 has an opposite first base plane 11 and a first abutment surface 12, and the second flange 2 has an opposite second base plane 21 and a second abutment surface 22, wherein the two bases The planes 11, 21 are far away from and parallel to each other, and the two abutting surfaces 12, 22 are butted and matched with each other. Different from conventionally designed butt joints that are planar, the first butt joint 12 here includes four joints arranged between the bolt 3 and the central a...

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Abstract

The invention provides a flanged connection component which comprises a first annular flange plate, a second annular flange plate. The first flange plate and the second flange plate are connected through a fastening piece, are aligned relative to a central shaft, and are respectively provided with base planes which are far from each other and butt joint faces which are matched with each other. Each butt joint face comprises at least one oblique plane, and a certain angle is formed between the oblique planes and the base planes. The two flange plates can shift in the axial direction in a driven mode, so that the too small or too large pressing force due to the fact that bolts extend due to thermal expansion and difference of thickness expansion amounts of the flange plates is compensated, the purpose of effective sealing is achieved, moreover, pre-tightening force borne by the bolts can be reduced on the premise of not increasing the number of the bolts, and reliability and economy of the flanged connection component are improved.

Description

technical field [0001] The invention relates to a flange structure, in particular to a flange connection assembly. Background technique [0002] At present, the known flange connection components are composed of fasteners (generally bolts), flanges and gaskets, which have good sealing performance, simple structure, low cost, convenient disassembly and assembly, and can withstand high characteristics such as pressure. Therefore, flange connection components are widely used in the connection of pressure vessels, pipes and valves in the fields of energy, petroleum, chemical industry, shipbuilding, power and aerospace. [0003] The bolt pre-tightening force is one of the important factors affecting the flange seal. If the pre-tightening force is too low, the compression force of the gasket will not be sufficient to achieve effective sealing; if the pre-tightening force is too high, the compression force will be too large. It is easy to crush the gasket and lose its resilience,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L23/032F16L23/24F16L23/18
CPCF16L23/032F16L23/18F16L23/24
Inventor 李启明王纳秀王允张金红孔祥波张钦华林良程
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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