Pipe coupler

A pipe coupler comprising:

• a body 100 having connectors 100a and 100b corresponding to at least two or more pipes 10 inserted thereinto in such a manner as to allow the pipes 10 to be connected thereto, first slant surfaces 120 formed along inner peripheral surfaces of the connectors 100a and 100b in such a manner as to become narrow from the front end peripheries thereof to the rear end peripheries thereof, first projections 110 formed along the smallest inner peripheral surfaces in the inner peripheral surfaces of the connectors 100a and 100b in such a manner as to protrude vertically toward a direction where an imaginary line L traverses centers of the connectors 100a and 100b, a coated surface 130 formed on an area where the lower end inner peripheries of the connectors 100a and 100b and the first projections 110 are located in such a manner as to be vertically stepped toward the direction where the imaginary line L is formed, and first screw threads 140 formed along outer peripheral surfaces of areas where the connectors 100a and 100b are located;
• first pads 200 having second slant surfaces 210 whose inner and outer peripheries become enlarged from front ends thereof toward rear ends thereof in such a manner as to be inserted into the front end peripheries of the connectors 100a and 100b, second projections 211 protruding from the front inner peripheral surfaces of the second slant surfaces 210 toward the direction where the imaginary line L is located in such a manner as to allow the front end peripheries of the second slant surfaces 210 to come into contact with the coated surface 130, and mounting surfaces 220 protruding from the outer peripheral surfaces of the rear ends of the second slant surfaces 210 in outer circumferential directions thereof in such a manner as to become enlarged from the inner peripheries of the front ends thereof toward the inner peripheries of the rear ends thereof to be thus mounted on the rear end peripheries of the connectors 100a and 100b;
• sealing washers 300 having third slant surfaces 310 whose inner and outer peripheries become enlarged from front ends thereof toward rear ends thereof in such a manner as to be inserted into the inner peripheral surfaces of the mounting surfaces 220 and vertical stepped surfaces 320 protruding vertically from the outer peripheral surfaces of the rear ends of the third slant surfaces 310 in outer circumferential directions thereof;
• tie rings 400 having fourth slant surfaces 410 whose front ends have outer peripheries corresponding to the inner peripheries of the vertical stepped surfaces 320 and whose inner peripheries become enlarged toward the rear ends thereof in such a manner as to be thus seated onto the inner peripheral surfaces of the vertical stepped surfaces 320 and through holes 400a for dimension compatibility formed on one side thereof in circumferential directions thereof in such a manner as to be traversed from the front end thereof toward the rear end thereof;
• second pads 500 having fifth slant surfaces 510 whose front end peripheries correspond to the rear end peripheries of the vertical stepped surfaces 320 in such a manner as to come into contact with the rear end peripheries of the vertical stepped surfaces 320 and whose outer peripheries become enlarged from the front ends thereof toward the rear ends thereof, rounded stepped surfaces 520 formed concavely on the inner peripheries of the front ends thereof in such a manner as to fit the rear end peripheries of the tie rings 400 thereto, locking portions 521 protruding from one side of the rounded stepped surfaces 520 in such a manner as to be inserted into the through holes 400a for dimension compatibility of the tie rings 400, and openings 500a for dimension compatibility formed on one side of the peripheral surfaces thereof in such a manner as to be traversed from the front ends thereof toward the rear ends thereof;
• and
• nuts 600 having second screw threads 610 formed on the inner peripheries of the front end portions thereof in such a manner as to be coupled to the first screw threads 140 and sixth slant surfaces 620 formed on the inner peripheries of the rear end portions thereof in such a manner as to be reduced from the front ends thereof toward the rear ends thereof and to thus insert the second pads 500 thereinto,
• wherein the coated surface 130 is made of an insulating material and has protrusions 131 protruding slantly downward from inner peripheral surfaces of end peripheries thereof toward directions where the rear end peripheries of the connectors 100a and 100b are located, and the first pads 200, the sealing washers 300, and the second pads 500 are made of elastic insulating materials, the inner peripheries of the front ends of the sealing washers 300 being smaller than outer diameters of the pipes 10 and the inner peripheries of the rear ends thereof being larger than the outer diameters of the pipes 10.