Flush Valve

Abstract

A flush valve includes a dual flush body for connecting to a flapper overflow tube of a bath-sanitation product, a dual control switch box and a positioning base, wherein an elastic sealing gasket is provided on the positioning base and matching with a sealing layer of a flapper base, the dual control switch box comprises a control chain component, a control rotating shaft is mounted inside a rotating shaft cavity of the dual control switch box, wherein one end of the control rotating shaft is connected to a handle, the other end of the control rotating shaft is connected to a push-button by a control swing rod, and the control rotating shaft is connected to the control chain component.

1 . A flush valve, comprising: a dual flush valve body for connecting to a flapper overflow tube, a positioning base matching with said dual flush valve body, an elastic sealing gasket provided on said positioning base for matching with a sealing layer on a flapper base, and a dual control switch box applicable with either a push button or a handle. 
     
     
         2 . The flush valve, as recited in  claim 1 , wherein a retaining cylinder is provided on said positioning base for attaching on the flapper overflow tube. 
     
     
         3 . The flush valve, as recited in  claim 2 , wherein an adjustment positioning circle is provided inside said retaining cylinder for matching with the flapper overflow tube. 
     
     
         4 . The flush valve, as recited in  claim 3 , wherein one end of said adjustment positioning circle is an opening loop having an open part and the other end of said adjustment positioning circle is a cylinder. 
     
     
         5 . The flush valve, as recited in  claim 4 , wherein a locking component for locking up said adjustment positioning circle is provided on said open part. 
     
     
         6 . The flush valve, as recited in  claim 5 , wherein two locking lugs are provided on said open part of said adjustment positioning circle and a locking hole is provided in each of said locking lugs for installing said locking component. 
     
     
         7 . The flush valve, as recited in  claim 6 , wherein said locking component comprises a butterfly bolt for crossing through said locking hole and a butterfly nut matching with said butterfly bolt. 
     
     
         8 . The flush valve, as recited in  claim 6 , wherein an adjustment insert-plate is provided in said adjustment positioning circle for matching flapper overflow tubes of different diameters. 
     
     
         9 . The flush valve, as recited in  claim 8 , wherein the sealing layer on the flapper base and said elastic sealing gasket are installed plane to plane or oblique to oblique. 
     
     
         10 . The flush valve, as recited in  claim 1 , wherein said dual control switch box comprises a control chain component connected to said dual control switch box for controlling an operation state of said flush valve. 
     
     
         11 . The flush valve, as recited in  claim 10 , wherein a rotating shaft cavity is provided inside said dual control switch box, a control rotating shaft is mounted inside said rotating shaft cavity, wherein a handle is connected to one of said control rotating shaft, a control swing rod is connected to the other end of said control rotating shaft, and said control rotating shaft is connected to said control chain component. 
     
     
         12 . The flush valve, as recited in  claim 11 , wherein a linkage component is provided inside said dual control switch box, and said handle is connected to said control chain component by said linkage component. 
     
     
         13 . The flush valve, as recited in  claim 12 , wherein said linkage component comprises a control link bar and a control slider; wherein one end of said control link bar is connected to said control rotating shaft and the other end of said control link bar is connected to said control slider; said control chain component is connected to said control slider. 
     
     
         14 . The flush valve, as recited in  claim 13 , wherein a connecting member is provided inside said dual control switch box and said push-button is connected to said control rotating shaft by said connecting member. 
     
     
         15 . The flush valve, as recited in  claim 14 , wherein said connecting member comprises said control swing rod sleeved on said control rotating shaft. 
     
     
         16 . The flush valve, as recited in  claim 15 , wherein a handle-positioning blocker is provided in said dual control switch box for positioning and installing said handle. 
     
     
         17 . The flush valve, as recited in  claim 16 , wherein a button-positioning blocker is provided in said dual control switch box for positioning and installing said push-button.