Fluid supply pipe

In combination of first and second internal structures for a fluid supply apparatus, the fluid supply apparatus having a pipe body configured to house the first internal structure and the second internal structure, the pipe body being formed in a hollow tube shape and having an inlet and an outlet, wherein:

• the first internal structure comprises
• a body portion comprising a shaft portion having a circular cross-section and a plurality of protrusions protruding from an outer circumferential surface of the shaft portion, wherein the plurality of protrusions are formed in a net shape and form a plurality of flow paths on the outer circumferential surface of the shaft portion, and
• the second internal structure formed in a hollow shaft shape comprises
• a body portion comprising a hollow shaft portion having a circular cross-section and a plurality of protrusions protruding from an outer circumferential surface of the hollow shaft portion, wherein the plurality of protrusions are formed in a net shape and form a plurality of flow paths on the outer circumferential surface of the hollow shaft portion,
• wherein at least a part of the first internal structure is housed in the hollow of the second internal structure;
• a fluid flowing into the pipe body through the inlet is divided into two flows, and a part of the fluid flows into the hollow of the second internal structure and the rest of the fluid flows into the internal space of the pipe body;
• and
• the part of the fluid flowing through flow paths on the outer circumferential surface of the body portion of the first internal structure housed in the hollow of the second internal structure joins the rest of the fluid flowing through flow paths on the outer circumferential surface of the body portion of the second internal structure housed in the internal space of the pipe body after the fluid flows out of the second internal structure, and the fluid flows out through the outlet of the pipe body.

A fluid supply apparatus comprising:

• a first internal structure;
• a second internal structure;
• and
• a pipe body configured to house the first internal structure and the second internal structure, the pipe body being formed in a hollow tube shape and having an inlet and an outlet,
• the first internal structure comprising:
• a body portion comprising a shaft portion having a circular cross-section and a plurality of protrusions protruding from an outer circumferential surface of the shaft portion, wherein the plurality of protrusions are formed in a net shape and form a plurality of flow paths on the outer circumferential surface of the shaft portion, and micro bubbles are generated while a fluid passes the body portion in the case the fluid is a liquid and a static pressure is lowered to reach the saturated vapor pressure of the liquid due to a cavitation phenomenon, and
• the second internal structure formed in a hollow shaft shape comprising:
• a body portion comprising a hollow shaft portion having a circular cross-section and a plurality of protrusions protruding from an outer circumferential surface of the hollow shaft portion, wherein the plurality of protrusions are formed in a net shape and form a plurality of flow paths on the outer circumferential surface of the hollow shaft portion, and micro bubbles are generated while a fluid passes the body portion in the case the fluid is a liquid and a static pressure is lowered to reach the saturated vapor pressure of the liquid due to a cavitation phenomenon,
• wherein at least a part of the first internal structure is housed in the hollow of the second internal structure;
• a fluid flowing into the pipe body through the inlet is divided into two flows, and a part of the fluid flows into the hollow of the second internal structure and the rest of the fluid flows into the internal space of the pipe body;
• and
• the part of the fluid flowing through flow paths on the outer circumferential surface of the body portion of the first internal structure housed in the hollow of the second internal structure joins the rest of the fluid flowing through flow paths on the outer circumferential surface of the body portion of the second internal structure housed in the internal space of the pipe body after the fluid flows out of the second internal structure, and the fluid flows out through the outlet of the pipe body.