Underwater packer

Abstract

The present disclosure provides an underwater packer, including an outer pile, a sleeve arranged inside the outer pile, a plug arranged at a bottom end of the sleeve, a grouting pipeline arranged on the sleeve, several resin flaps arranged between the outer pile and the sleeve, and a sealing cloth connected between two adjacent resin flaps through thermal fusion, a bottom end of the resin flap is hinged on the plug, and a top end of the resin flap abuts an inner wall of the outer pile. The outer wall of the outer pile and the inner wall of the sleeve are in direct contact with the grouting material, allowing the connection between the outer pile and the sleeve to be more secured. The inclined surface formed in the top portion of the resin flap and the pressing surface of the protrusion abut the inner wall of the outer pile.

What is claimed is: 
     
         1 . An underwater packer, wherein the underwater packer comprises:
 an outer pile;   a sleeve arranged inside the outer pile;   a plug arranged at a bottom end of the sleeve;   a grouting pipeline arranged on the sleeve;   several resin flaps arranged between the outer pile and the sleeve, and a sealing cloth connected between two adjacent resin flaps through thermal fusion;   a bottom end of the resin flap is hinged on the plug, and a top end of the resin flap abuts an inner wall of the outer pile; an annular sealing membrane is connected to a hinge joint of the resin flap through thermal fusion, and a sealing strip is connected to a top end of the sealing cloth through thermal fusion and abuts the inner wall of the outer pile.   
     
     
         2 . The underwater packer according to  claim 1 , wherein a protrusion is arranged on a back of the resin flap, an inclined surface is formed in a top portion of the resin flap, and a pressing surface of the protrusion is located on an extension surface of the inclined surface. 
     
     
         3 . The underwater packer according to  claim 2 , wherein a length e of the resin flap is: e≥(a−0.5c−0.5b)/cos (90°−g), wherein a is an inner diameter of the outer pile, b is an outer diameter of the sleeve, c is an outer diameter of the plug, g is an angle between the inclined surface and an extension line of the resin flap within a range of 45°<g<60°. 
     
     
         4 . The underwater packer according to  claim 3 , wherein an angle between a main body of the resin flap and the protrusion is greater than 90°−g. 
     
     
         5 . The underwater packer according to  claim 1 , wherein a width of the sealing cloth is ⅕-⅛ of a width of the resin flap. 
     
     
         6 . The underwater packer according to  claim 1 , wherein a fixing ring is connected to the sleeve, and a hole seat passing through the fixing ring is formed in the bottom end of the resin flap. 
     
     
         7 . The underwater packer according to  claim 1 , wherein two ends of the annular sealing membrane are respectively connected to the resin flap and the sleeve through thermal fusion. 
     
     
         8 . The underwater packer according to  claim 7 , wherein the annular sealing membrane is a PVDF membrane or a PTFE membrane. 
     
     
         9 . The underwater packer according to  claim 1 , wherein both the resin flap and the sleeve are provided with mounting rings, and the two mounting rings are connected by an elastic rope. 
     
     
         10 . The underwater packer according to  claim 1 , wherein the sealing cloth is polyurethane cloth or polyester cloth.