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Assembled positioning tenon of shield segment

Assembled positioning tenon of shield segment: used for positioning and force transmission between shield segments in rail transit. The finished product is made of high strength nylon modified material, and the main components are PA66 and glass fiber. A patent for tube segment assembly, The utility model abandons the complicated shield segment design which uses positioning bar or concave convex tenon groove in the prior art. The location of positioning groove is prefabricated on the side (connection surface) of shield segment, and the positioning tenon sleeve is added between two segments for installation limit, which not only ensures the requirements of segment construction assembly limit, but also effectively protects arc-shaped connecting bolts, so as to optimize the design and processing technology of steel mold In addition, steel sleeve is embedded in the positioning tenon sleeve to effectively ensure the construction quality of segment assembly ring.

  • Brand: Xuntuo

Shield pipe sheet assembly type Positioning tenon : used for positioning and force transfer between shield segments in rail transit.


A shield segment assembly Positioning tenon set , The utility model abandons the design of complex shield segment using positioning bar or concave convex groove in the prior art, and the position of positioning groove is prefabricated on the side (connection surface) of shield segment, and the position is added between two segments Positioning tenon The sleeve is used for installation limit, which can not only ensure the requirements of segment construction assembly limit, but also effectively protect the arc-shaped connecting bolt, so that the steel mold design and processing technology is optimized Positioning tenon The steel sleeve is embedded in the sleeve to ensure the construction quality of segment assembly ring.


The finished product is made of high strength nylon modified material, and the main components are PA66 and glass fiber.


Material property indicator

Physical items

Propperty

Company

Unit

ASTM measuring method

Test method

 

numerical value

density

Density

g/cm3

D792-13

one point five five

Tensile strength at break

Tensile strength,at breake

Mpa

D638-14

two hundred and forty-six

elongation at break

Elongation,at breake

 

D638-14

two

Yield bending strength

Flexural sterength,at yield

Mpa

D790-10

three hundred and sixty

Bending modulus

Flexural modulus

Mpa

D790-10

fourteen thousand and five hundred

Izod impact sterength, notched

KJ/m2

D256-10

forty-one


 

Rockwell hardness

Hardness,rockwell

--

D785-08

one hundred and twenty

melting point

Melting point

D789-07

two hundred and sixty-five

Hot deformation temperature (0.45MPa)

Heat deflection tempeirature

D648-07

two hundred and fifty-five

Flame retardancy

Fire resistance

--

UL94

HB

Surface resistance

Surface resistivity

O hm

D257-07

one thousand and thirteen

Dielectric strength

Delectric strength

KV/mm

D149-09

twenty

Linear molding shrinkage

Molding shrinkage

mm/mm

D955-08

zero point zero zero two


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