Screen Intake Device for Shallow Water

Abstract

A screen intake apparatus has a concrete platform resting on a water source floor. A screen intake anchors on the platform and forms a half cylinder thereon. A barrier at one end of the platform in divides the flow of water. The screen intake has a half-cylindrical body and half-cylindrical screens. Transition walls in the screen intake divide the body's hollow and the screens' interiors, and at least one flow modifier communicates the interior with the hollow. These flow modifiers also form a half cylinder with the platform. A manifold in the screens receives a supply of air to clear debris. Forming a half-cylinder, the screen intake on the platform can have a much lower profile for the water source than the normal cylindrical screens, which require half of its diameter in clearance above and below.

1 . A screen intake apparatus for a flat surface in a water source, comprising:
 a body mounted on the flat surface in the water source, the body defining a hollow therein and having an outlet; and   a first curved screen mounted on the flat surface and defining a first interior therein, a first end of the first curved screen connected to the body and placing the first interior of the first curved screen in communication with the hollow of the body.   
     
     
         2 . The apparatus of  claim 1 , wherein the first curved screen comprises a half-cylindrical screen sidewall, an open proximal end at the first end, and a closed distal end at a second end, the open proximal end connected to the body and placing the first interior in communication with the hollow. 
     
     
         3 . The apparatus of  claim 2 , wherein the closed distal end comprises an end wall defining a half circle. 
     
     
         4 . The apparatus of  claim 1 , further comprising:
 a transition wall disposed between the first interior of the first curved screen and the hollow of the body; and   at least one first flow modifier disposed in the transition wall and placing the interior of the first curved screen in communication with the hollow of the body.   
     
     
         5 . The apparatus of  claim 4 , wherein the at least one first flow modifier comprises at least two first flow modifiers nested inside one another. 
     
     
         6 . The apparatus of  claim 4 , wherein the at least one first flow modifier comprises a half cylinder mounted on the flat surface. 
     
     
         7 . The apparatus of  claim 1 , further comprising a second curved screen mounted on the flat surface and defining a second interior therein, a first end of the second curved screen connected to an opposing end of the body from the first curved screen and placing the second interior of the second curved screen in communication with the hollow of the body. 
     
     
         8 . The apparatus of  claim 7 , further comprising:
 at least one first flow modifier disposed between the first curved screen and the body and communicating the first interior with the hollow; and   at least one second flow modifier disposed between the second curved screen and the body and communicating the second interior with the hollow.   
     
     
         9 . The apparatus of  claim 1 , further comprising a manifold disposed in the at least one curved screen for receiving a supply of air. 
     
     
         10 . The apparatus of  claim 1 , wherein the at least one curved screen comprises:
 a plurality of ribs disposed along a length of the at least one curved screen; and   a plurality of wires disposed across the ribs.   
     
     
         11 . The apparatus of  claim 1 , wherein the body comprises a half cylinder mounted on the flat surface. 
     
     
         12 . A screen intake apparatus for a floor of a water source, comprising:
 a base resting on the floor of the water source and having a top surface;   a body mounted on the top surface of the base, the body defining a hollow therein and having an outlet; and   at least one curved screen mounted on the top surface of the base and defining an interior therein, a first end of the at least one curved screen connected to the body and placing the interior of the at least one curved screen in communication with the hollow of the body.   
     
     
         13 . The apparatus of  claim 12 , wherein the at least one curved screen comprises first and second curved screens mounted on the base adjacent opposing ends of the body. 
     
     
         14 . The apparatus of  claim 12 , wherein the at least one curved screen comprises a half cylinder screen sidewall, an open proximal end for the first end, and a closed distal end for a second end, the open proximal end connected to the body. 
     
     
         15 . The apparatus of  claim 14 , wherein the closed distal end comprises an end wall defining a half circle. 
     
     
         16 . The apparatus of  claim 14 , further comprising:
 a transition wall disposed between the hollow of the body and the interior of the at least one curved screen; and   at least one flow modifier disposed in the transition wall and placing the interior of the at least one curved screen in communication with the hollow of the body.   
     
     
         17 . The apparatus of  claim 16 , wherein the at least one flow modifier comprises at least two flow modifiers nested inside one another. 
     
     
         18 . The apparatus of  claim 16 , wherein the at least one flow modifier comprises a half cylinder mounted on the top surface of the base. 
     
     
         19 . The apparatus of  claim 12 , wherein the base comprises a concrete slab resting on the floor of the water source and having the body and the at least one curved screen mounted thereon. 
     
     
         20 . The apparatus of  claim 12 , wherein a plurality of anchors affix edges of the body and the at least one curved screen to the base. 
     
     
         21 . The apparatus of  claim 12 , wherein the at least one curved screen comprises a cylindrical screen partially embedded in the base. 
     
     
         22 . The apparatus of  claim 12 , wherein the base comprises a barrier disposed at one end thereof in a flow path of the water source. 
     
     
         23 . The apparatus of  claim 12 , wherein the barrier extends to a height of the body disposed on the base. 
     
     
         24 . The apparatus of  claim 12 , further comprising a manifold disposed in the at least one curved screen for receiving a supply of air. 
     
     
         25 . The apparatus of  claim 12 , wherein the at least one curved screen comprises:
 a plurality of ribs disposed along a length of the at least one curved screen; and   a plurality of wires disposed across the ribs.   
     
     
         26 . The apparatus of  claim 12 , wherein the body comprises a half cylinder mounted on the top surface of the base. 
     
     
         27 . A screen intake method, comprising:
 constructing a platform having a top surface;   mounting a body on the top surface of the platform;   mounting at least one curved screen on the top surface of the platform adjacent the body such that an interior of the at least one curved screen communicates with a hollow of the body;   disposing the platform, the body, and the at least one curved screen in a water source; and   connecting an outlet of the body to piping.