Sealed sleeve

Abstract

A sealed sleeve installed at an insertion coupling portion in a state in which a first pipe and a second pipe are insertion coupled to each other in order to seal couple the first pipe having a first outer diameter and a first inner diameter and the second pipe having a second outer diameter and a second inner diameter larger than the first outer diameter includes: a pillar shaped-main body having a main body central shaft; a through-hole formed using the main body central shaft as a central shaft on the main body and having an inlet as a second pipe side opening in an installation state and an outlet as a first pipe side opening in an installation state, wherein in the through-hole, a pressing portion that applies a sealing pressure to the insertion coupling portion is formed in a portion of an inner wall, and an inner diameter of the pressing portion is smaller than the second outer diameter.

1 . A sealed sleeve installed at an insertion coupling portion in a state in which a first pipe and a second pipe are insertion coupled to each other in order to seal couple the first pipe having a first outer diameter and a first inner diameter and the second pipe having a second outer diameter and a second inner diameter larger than the first outer diameter, the sealed sleeve comprising:
 a pillar-shaped main body having a main body central shaft; and   a through-hole formed using the main body central shaft as a central shaft on the main body and having an inlet as a second pipe side opening in an installation state and an outlet as a first pipe side opening in an installation state,   wherein the through-hole has a pressing portion formed from a pressing portion second boundary portion positioned at a corner of the outlet to a pressing portion first boundary portion existing at a predetermined position therein to hermetically press the insertion coupling portion,   an inner diameter of the pressing portion is smaller than the second outer diameter and the pressing portion has the same inner diameter at an entire point from a pressing portion second boundary portion positioned at a corner of the outlet to a pressing portion first boundary portion,   in a mounting process of the sealed sleeve, as the sealed sleeve is gradually further inserted into the second pipe side, in order to gradually increase a pressure in which the sealed sleeve applies to the second pipe, the through-hole has a pressing introducing portion whose inner diameter gradually decreases over an area from the inlet to the pressing portion first boundary portion,   an inner wall of the through-hole forming the pressing introducing portion is formed in a curved surface, and   a sectional outer edge line of the pressing introducing portion by a flat surface comprising the main body central shaft becomes a convex-shaped arc having a predetermined curvature radius.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . The sealed sleeve of  claim 1 , wherein a length from the pressing portion first boundary portion to the pressing portion second boundary portion as a main body central shaft direction length of the pressing portion is about 20% to about 40% of a central shaft direction length of the main body. 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . The sealed sleeve of  claim 1 , wherein the pressing portion comprises a front end pressing portion and a rear end pressing portion, and an inner diameter of the front end pressing portion is larger than an inner diameter of the rear end pressing portion. 
     
     
         9 . The sealed sleeve of  claim 1 , wherein the main body has an identification structure that enable to identify directions of the inlet and the outlet by tactile sense. 
     
     
         10 . The sealed sleeve of  claim 9 , wherein the identification structure is formed in an embossing structure relatively protruded from the main body outer surface or an engraving structure relatively depressed from the main body outer surface. 
     
     
         11 . The sealed sleeve of  claim 10 , wherein the embossing structure or the engraving structure has a step of about 0.2 mm to about 2 mm from the main body outer surface. 
     
     
         12 . The sealed sleeve of  claim 1 , wherein a difference between an inner diameter of the pressing portion and the second outer diameter is about 5% to about 15% of the second outer diameter. 
     
     
         13 . The sealed sleeve of  claim 8 , wherein a difference between the front end pressing portion inner diameter and the rear end pressing portion inner diameter is about 1% to about 10% of the rear end pressing portion inner diameter. 
     
     
         14 . A method of using the sealed sleeve of  claim 6 , the method comprising:
 inserting the sealed sleeve into a first pipe such that an inlet is adjacent to an insertion coupling portion;   insertion coupling the first pipe to the second pipe with the sealed sleeve inserted;   inserting an end portion of the second pipe into the inlet side of the sealed sleeve;   enabling an end portion of the second pipe to arrive at the pressing portion first boundary portion, as the second pipe is inserted along a curved surface of the pressing introducing portion, by pressing a pressure to an end portion of the outlet side of the sealed sleeve;   enabling the second pipe end portion to arrive at the pressing portion second boundary portion by pressing a pressure to the outlet side end portion of the sealed sleeve; and   enabling sealing connection of the first pipe and the second pipe to be complete, as the pressing portion applies a sealing pressure to the insertion coupling portion.