INTERNAL PRESSURE VESSEL

摘要

Provided is a pressure vessel able to sustain a circular shape without deforming to ellipsoidal shape due to machining of side port apertures therein, and maintain pressures as high as 800-1,200 PSI. The pressure vessel is intended for use in seawater desalination by reverse osmosis, and comprises a pipe body (1) formed by filament winding (FW), and is furnished with an occluding cover (2) at each end of the pipe body (1), the peripheral surface of the pipe body being furnished, inward from the occluding covers (2), with inflow/outflow parts (3) through which the fluid flows in or out. The pipe body (1) is constituted by a helical layer (4), hoop layers, and a seal layer (6) furnished as the innermost layer. The helical layer (4) is furnished with a divergent part (7) diverging away from the seal layer (6) and extending from a location outward from the occluding cover (2) to a location inward from the inflow/outflow part (3). The hoop layers are constituted by a first hoop layer (8) furnished between the divergent part (7) and the seal layer (6), and a second hoop layer (9) furnished at the outer circumference of the helical layer (4), and extending from a location outward from the occluding cover (2) to a location inward from the inflow/outflow part (3).

主权项

1. A pressure vessel for use in seawater desalination or water purification by reverse osmosis, comprising a pipe body formed by winding into layers continuous fibers by filament winding, wherein the pressure vessel is characterized by being furnished, at each end in the axial direction of the pipe body, with an occluding cover for occluding the pipe body, the peripheral surface of the pipe body being furnished, inward from the occluding covers in the pipe body axial direction, with inflow/outflow parts through which fluid flows in or out from the peripheral surface of the pipe body, the pipe body being constituted by a helical layer formed by helical winding of fibers, hoop layers formed by hoop winding of fibers, and a seal layer furnished as the innermost layer, the helical layer being furnished, at each end in the axial direction of the pipe body, with a divergent part diverging outward from the seal layer in the circumferential direction and extending from at least a location outward from the occluding cover in the pipe body axial direction to a location inward from the inflow/outflow part in the pipe body axial direction, the hoop layers being constituted by a first hoop layer furnished between the seal layer and the divergent part of the helical layer, and a second hoop layer furnished at the outer circumference of the helical layer, and extending from a location outward from the occluding cover in the pipe body axial direction to a location inward from the inflow/outflow part in the pipe body axial direction.