Pipe insert

Abstract

There is provided an insert to be sealingly mounted into a plug hole of a pipe having a sealing area surrounding the plug hole. The insert comprises an internal unit and a fastener. The internal unit and the fastener have corresponding cooperating sealing portions and mounting portions. The sealing portion of the internal unit is formed with a flange adapted to be forced into the plug hole. The flange and the sealing portion of the fastener have corresponding sealing surfaces. These surfaces are adapted to sealingly clamp therebetween the sealing area of the pipe, when the insert is mounted into the plug hole. One of the sealing surfaces being in the form of a sealing edge and the other being in the form of a conical surface. When the fastener is mounted onto the internal unit, the sealing portions of the internal unit and the fastener form therebetween a chamber. The chamber is in fluid communication with the outside environment, allowing atmospheric pressure within the chamber.

1 . A control gate mounted sealingly to an irrigation pipe, the gate being adapted to receive an adjusting element to limit the fluid flow therethrough and out of the pipe.  
     
     
         2 . A control gate according to  claim 1 , comprising a plug manually movable between a non-operative and an operative position wherein in the operative position the plug substantially stops the fluid flow out of the pipe.  
     
     
         3 . A control gate according to  claim 1 , wherein the adjusting element is replaceable.  
     
     
         4 . A control gate according to  claim 1 , wherein for a given fluid pressure in the pipe the adjusting element adjusts the flow of fluid exiting the pipe to a single flow.  
     
     
         5 . A control gate according to  claim 1 , wherein the flow adjusting element comprises an aperture through which the fluid passes when exiting the pipe.  
     
     
         6 . A control gate according to  claim 1 , wherein the gate has an axis and comprises a nozzle, the fluid flows through the gate along the axis and the nozzle diverts the flow of fluid in a direction transverse to the axis.  
     
     
         7 . A control gate according to  claim 1 , wherein the irrigation pipe is a lay flat irrigation pipe.  
     
     
         8 . A control gate according to  claim 1 , wherein the adjusting element is adapted to connect to an irrigation element.  
     
     
         9 . A control gate according to  claim 8 , wherein the irrigation element is a drip irrigation pipe.