Straight-pipe pressure balanced expansion joint with three-direction compensations

Abstract

The invention relates to a straight-pipe pressure balanced expansion joint with three-direction compensations. The straight-pipe pressure balanced expansion joint is composed of a flange A, a workingcorrugated pipe and a flange B, which are connected in order. A plurality of balance components are arranged in the circumferential direction of the outer part of the working corrugated pipe between the flange A and the flange B. Each balance component is composed of a pressure cylinder fixedly arranged on the flange A, pistons and a universal connecting rod assembly, at least two independent pressure chambers are formed in the pressure cylinder, and each piston is arranged in each pressure chamber in a sliding mode. When the working corrugated pipe is compressed, a medium in the sealing chamber in the pressure cylinder at the compressed position is added along with the sliding of the pistons. When the working corrugated pipe is stretched, a medium in the sealing chamber in the pressure cylinder at the stretched position is added along with the sliding of the pistons, and thus the expansion joint is in a balanced state. The straight-pipe pressure balanced expansion joint solves the problems of too large outer diameter, heavy weight and high manufacturing cost of the conventional straight-pipe pressure balanced expansion joint, meanwhile has the capability of compensating axial displacement, transversal displacement and angular displacement, and is flexible in displacement compensation.

Description

technical field [0001] The invention relates to a straight pipe pressure balanced expansion joint, in particular to a straight pipe pressure balanced expansion joint with three-way compensation. Background technique [0002] There are two conventional types of pressure balanced expansion joints for straight pipes: external pressure and internal pressure. Straight pipe pressure balance expansion joint of external pressure type ( figure 1 ) consists of a set of working bellows and a set of balance bellows, which are mainly used to absorb axial displacement and can balance the pressure thrust of the bellows. Internal pressure type straight pipe pressure balance expansion joint ( figure 2 ) consists of two working bellows and a balance bellows in the middle, tie rods, end plates and other structural parts, mainly used to absorb axial and lateral displacement and to balance the pressure thrust of the bellows. [0003] In order to achieve pressure balance in conventional strai...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a straight-pipe pressure-balanced expansion joint with three-way compensation, which solves the problems of conventional straight-pipe pressure-balanced expansion joints with excessively large outer diameter, heavy weight, and high manufacturing cost; at the same time Capable of compensating axial displacement, lateral displacement and angular displacement, flexible displacement compensation

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