Inlet and outlet damping expansion joint of anti-fatigue type pump

Abstract

The invention discloses an inlet and outlet damping expansion joint of an anti-fatigue type pump. The expansion joint comprises flanges, a limiting protecting sleeve and a corrugated pipe, wherein the flanges are respectively welded at the two ends of the corrugated pipe, the flanges at the two ends are respectively provided with a lug plate, a pull rod penetrates through the lug plates, the two ends of the pull rod are used for connecting the lug plates together through nuts, the inner side end of each lug plate is provided with an adjusting nut, the limiting protecting sleeve is sheathed on the corrugated pipe, the inner wall of the limiting protecting sleeve is in contact with peaks of the corrugated pipe, and one end of the limiting protecting sleeve is fixedly connected with the inner end surface of each flange. The expansion joint has the further improvement that the two limiting protecting sleeves are respectively and fixedly connected with the inner end surfaces of the flanges, the two corrugated pipes are coated by the limiting protecting sleeves, the inner wall of each corrugated pipe is provided with a corrosion-resistant layer, and a spherical spacer and a conical spacer assembly are arranged between each nut and each lug plate. The expansion joint has the advantages that the fatigue failure of the parts at the two ends of the corrugated pipe is effectively prevented, the service life is obviously prolonged, and the corrosion-resistant property is higher.

Description

technical field [0001] The invention relates to a pipeline compensator, in particular to a pump inlet and outlet shock-absorbing expansion joint. Background technique [0002] Setting shock-absorbing expansion joints at the inlet and outlet of the pump can reduce the vibration and noise of the piping system. At present, the traditional pump inlet and outlet shock absorbers generally use stainless steel corrugated compensators, and the stainless steel corrugated compensators are compensated by bellows, which have a certain deflection, can absorb vibrations, reduce noise, and withstand high pressure and temperature. The flow rate of the liquid in the body is relatively fast, which forms an impact on the bellows, which will inevitably cause large deformations in the radial and axial directions of the bellows. The bellows are easily damaged under the action of alternating loads. The fracture of the bellows It usually occurs between the first corrugation and the second corrugati...

AI Technical Summary

Problems solved by technology

At present, the traditional pump inlet and outlet shock absorbers generally use stainless steel corrugated compensators, and the stainless steel corrugated compensators are compensated by bellows, which have a certain deflection, can absorb vibrations, reduce noise, and withstand high pressure and temperature. The flow rate of the liquid in the body is relatively fast, which forms an impact on the bellows, which will inevitably cause large deformations in the radial and axial directions of the bellows. The bellows are easily damaged under the action of alternating loads. The fracture of the bellows Usually occurs between the first corrugation and the second corrugation, the service life of the expansion joint is short

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