초록 ▼

A firing prevention structure of a fuel tank is provided with a double sleeve to pass through a hole formed in a rib, and a supporting structure to support a pipe to pass through the double sleeve. The supporting structure is attached to the rib. The supporting structure is provided with an insulati

A firing prevention structure of a fuel tank is provided with a double sleeve to pass through a hole formed in a rib, and a supporting structure to support a pipe to pass through the double sleeve. The supporting structure is attached to the rib. The supporting structure is provided with an insulating section which electrically insulates the pipe and the rib. The double sleeve is formed of electrically insulating material. Thus, an ignition source in the fuel tank is prevented.

대표청구항 ▼

1. A firing prevention structure of a fuel tank, said firing prevention structure comprising: a double sleeve including a sleeve section and a flange section, wherein said sleeve section is configured to pass through a hole formed in a rib, and said double sleeve is configured to be attached to the

1. A firing prevention structure of a fuel tank, said firing prevention structure comprising: a double sleeve including a sleeve section and a flange section, wherein said sleeve section is configured to pass through a hole formed in a rib, and said double sleeve is configured to be attached to the rib at said flange section; anda supporting structure configured to support a pipe such that the pipe passes through from said double sleeve and is spaced apart from said double sleeve, wherein said supporting structure is configured to be attached to the rib,wherein said supporting structure comprises a bracket and a clamp section having an insulating section, wherein said clamp section is configured to electrically insulate the pipe and the rib from each other while supporting the pipe, andwherein said double sleeve is formed of electrically insulating material. 2. The firing prevention structure according to claim 1, wherein said double sleeve comprises an inner sleeve and an outer sleeve, wherein said inner sleeve is formed of a first electrically insulating material,wherein said outer sleeve is formed of a second electrically insulating material which is different from said first electrically insulating material, andwherein said insulating section is formed of a third electrically insulating material which is different from said first electrically insulating material and said second electrically insulating material. 3. The firing prevention structure according to claim 2, wherein said first electrically insulating material, said second electrically insulating material and said third electrically insulating material are plastic materials, respectively, and wherein said first electrically insulating material is higher in tensile strength than said second electrically insulating material, and said third electrically insulating material is higher in tensile strength than said first electrically insulating material. 4. An aircraft having a firing prevention structure, said aircraft comprising: a rib having a hole;a double sleeve including a sleeve section and a flange section, wherein said sleeve section passes through said hole formed in said rib and said flange section is attached to said rib;a pipe which passes through said double sleeve;a supporting structure which is attached to said rib and supports said pipe such that said pipe passes through said double sleeve,wherein said supporting structure includes a bracket and a clamp section having an insulating section, wherein said clamp section electrically insulates said pipe and said rib from each other, andwherein said double sleeve is formed of electrically insulating material. 5. The aircraft according to claim 4, wherein said double sleeve comprises an inner sleeve and an outer sleeve, wherein said inner sleeve is formed of a first electrically insulating material,wherein said outer sleeve is formed of a second electrically insulating material which is different from said first electrically insulating material, andwherein said insulating section is formed of a third electrically insulating material which is different from said first electrically insulating material and said second electrically insulating material. 6. The aircraft according to claim 5, wherein said first electrically insulating material, said second electrically insulating material and said third electrically insulating material are plastic materials, respectively, and wherein said first electrically insulating material is higher in tensile strength than said second electrically insulating material, and said third electrically insulating material is higher in tensile strength than said first electrically insulating material. 7. An aircraft having a firing prevention structure, said aircraft comprising: a rib having a hole;a double sleeve including a sleeve section and a flange section extending radially outward from the sleeve section, wherein said sleeve section passes through said hole formed in said rib and said flange section is attached to said rib, and said double sleeve is formed of electrically insulating material;a pipe which passes through said double sleeve with a gap between an outer surface of said pipe and an inner surface of said sleeve section of said double sleeve;a supporting structure having a clamp section clamped on said pipe and a bracket attached to said rib,wherein said supporting structure includes a bracket and a clamp section having an insulating section,wherein said supporting structure extends away from said rib such that a gap is disposed between said clamp section and said rib in an axial direction of the pipe, andwherein said clamp section electrically insulates said pipe and said rib from each other. 8. The aircraft according to claim 7, wherein said double sleeve comprises an inner sleeve and an outer sleeve, wherein said inner sleeve is formed of a first electrically insulating material,wherein said outer sleeve is formed of a second electrically insulating material which is different from said first electrically insulating material, andwherein said insulating section is formed of a third electrically insulating material which is different from said first electrically insulating material and said second electrically insulating material. 9. The aircraft according to claim 8, wherein said first electrically insulating material, said second electrically insulating material and said third electrically insulating material are plastic materials, respectively, and wherein said first electrically insulating material is higher in tensile strength than said second electrically insulating material, and said third electrically insulating material is higher in tensile strength than said first electrically insulating material. 10. The aircraft according to claim 7, further comprising a wing, wherein the rib is a structural member disposed in the wing of the aircraft. 11. The aircraft according to claim 7, further comprising a wing, wherein the rib is a structural member disposed in the wing of the aircraft, and wherein the pipe is one of a fuel line and a hydraulic line, and is disposed in the wing of the aircraft. 12. The aircraft according to claim 11, wherein said double sleeve comprises an inner sleeve and an outer sleeve, wherein said inner sleeve is formed of a first electrically insulating material,wherein said outer sleeve is formed of a second electrically insulating material which is different from said first electrically insulating material, andwherein said insulating section is formed of a third electrically insulating material which is different from said first electrically insulating material and said second electrically insulating material. 13. The aircraft according to claim 12, wherein said first electrically insulating material, said second electrically insulating material and said third electrically insulating material are plastic materials, respectively, and wherein said first electrically insulating material is higher in tensile strength than said second electrically insulating material, and said third electrically insulating material is higher in tensile strength than said first electrically insulating material.