90-degree elbow for buffering water hammer force

Abstract

The invention discloses a 90-degree elbow for buffering the water hammer force. The 90-degree elbow mainly comprises a 90-degree elbow body and buffer tubes; each buffer tube mainly comprises a tubular cylinder with a flange at one end, a blind flange, a spring and a pressure bearing disc; the blind flanges and the pressure bearing discs are welded to the two ends of the springs correspondingly and are perpendicular to the axes of the springs; the blind flanges at one ends of the springs are matched with the flanges of the tubular cylinders to form flange connection; the other ends, welded tothe pressure bearing discs, of the springs extend into the interiors of the tubular cylinders; the pressure bearing discs move along the axes of the tubular cylinders along with the extension and retraction of the springs; and the axes of the buffer tubes coincide with the axis of one of two elbow opening ends of the 90-degree elbow body. The 90-degree elbow has the advantages that the structure is simple, the manufacturing cost is low, the pressure wave energy of the water hammer force can be effectively buffered by means of the energy storage effect of the springs, and the vicious destruction of the transient peak pressure of the water hammer force on the elbow can be effectively avoided.

Description

technical field

[0001] The invention belongs to the technical field of pipeline water hammer protection, and in particular relates to a 90° elbow for buffering water hammer force. Background technique

[0002] Water hammer is a sudden change or fluctuation of pressure caused by a sharp drop in the flow rate of liquid in a pressure pipeline. The damage caused by water hammer pressure to the pipeline system is huge. Water hammer can cause strong vibration of the pipeline system, resulting in noise and cavitation. In severe cases, it will cause vicious damage to pipelines and pipeline accessories.

[0003] There are usually two working conditions for the occurrence of water hammer pressure. One is the water hammer pressure when the valve is closed quickly. At this time, the fluid in a small section of pipe immediately behind the valve stops flowing, and its kinetic energy is converted into pressure energy, and then becomes Due to the elastic degeneration of water and pipes, th...

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