A Straight Pipe Pressure Balanced Expansion Joint with Three-way Compensation

Abstract

A pressure-balanced straight pipe expansion joint with three-way compensation, consisting of flange A, working bellows and flange B connected in sequence, and the working bellows between flange A and flange B are arranged on the outer circumference of the working bellows There are multiple balance components. The balance component is composed of a pressure cylinder, a piston and a universal connecting rod assembly fixed on the flange A. There are at least two independent pressure chambers in the pressure cylinder. There is a piston slidingly arranged in the pressure chamber. When the working bellows is compressed, the medium in the sealing chamber in the pressure cylinder at the compressed position increases with the sliding of the piston. When the working bellows is stretched, the medium at the stretched position The medium in the sealing chamber in the pressure cylinder increases with the sliding of the piston, so that the expansion joint is in a balanced state. The invention solves the problems of large outer diameter, heavy weight and high manufacturing cost of conventional straight pipe pressure balance expansion joints; at the same time, it has the ability to compensate axial displacement, lateral displacement and angular displacement, and the displacement compensation is flexible.

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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