Patent Publication Number: US-2022219183-A1

Title: Water stream stop valve for sprinkler

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a water stream stop valve for sprinkler, especially to one that can avoid the overflow of water, maintain the spraying at the original area, and deliver a service indication stream, when the spray head fell off. 
     2. Description of the Related Art 
     Referring to  FIGS. 1-3 , the main body  11  of the prior art pop-up sprinkler  10  is buried underground, the main body  11  having an expansion pipe  12  arranged inside and enable to pop out the ground and watering the ground by the spray head  13 , so this type pop-up sprinkler  10  can make the installation site tidier; however, once the spray head  13  of the pop-up sprinkler  10  fell off, the water stream will leak from the top of the expansion pipe  12 , as  FIG. 4  showing, and if doesn&#39;t notice the fell off of the spray head  13  will cause the flooding and the low water pressure of other pop-up sprinkler  10 . 
     SUMMARY OF THE INVENTION 
     It is a primary objective of the present invention to provide a water stream stop valve for sprinkler that cam solve the water leakage problem while the sprinkler fell off. 
     It is another objective of the present invention to provide a water stream stop valve for sprinkler that maintain the spraying at the original area, and deliver a service indication stream 
     In order to achieve the above objectives, the present invention includes: a tube body; an annular cover arranged on the outer periphery of the tube body; multiple securing units arranged vertically on the outer periphery of the tube body; a drainage body having a hole at the center is arranged above the tube body by multiple support plates, and the aperture of the hole is smaller than the top internal diameter of the tube body; 
     Moreover, the internal diameter of the tube body gradually shrinks from bottom to top, and the bottom surface of the drainage body is upwards from the inside to the outside. 
     Whereby water stream stop valve is applied in a pop-up sprinkler, wherein the pop-up sprinkler includes: a main body; an expansion pipe arranged on the main body, and having a stop member arranged at top internal diameter thereof; a spray head arranged at the top edge of the expansion pipe; and the water stream stop valve is arranged inside the expansion pipe and below the spray head; When the spray head fell off, due to the water pressure, the water stream stop valve will be pushed up to the top of the expansion pipe and stop at the stop member for avoiding the overflow of water, maintaining the spraying at the original area, and delivering a service indication stream. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram illustrating a pop-up sprinkler according to the prior art, while the expansion pipe is hidden; 
         FIG. 2  is a schematic diagram illustrating the pop-up sprinkler according to the prior art, while the expansion pipe is pop-up; 
         FIG. 3  is a schematic diagram illustrating the structure of a pop-up sprinkler according to the prior art; 
         FIG. 4  is a schematic diagram illustrating the structure of a pop-up sprinkler according to the prior art, while the spray head fell off; 
         FIG. 5A  is a perspective views of the water stream stop valve of the present invention; 
         FIG. 5B  is a sectional view along line  5 B- 5 B in  FIG. 5A ; 
         FIG. 6  is a schematic diagram illustrating the structure of a water stream stop valve of the present invention; 
         FIG. 7  is a schematic diagram illustrating the application of a water stream stop valve of the present invention; 
         FIG. 8  is a schematic diagram illustrating the spraying of a water stream stop valve of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 5A  and  FIG. 5B , a water stream stop valve  20  of the present invention includes a tube body  21  gradually shrinks from bottom to top, an annular cover  22  arranged on the outer periphery of the tube body  21 ; and multiple securing units arranged vertically on the outer periphery of the tube body  21 , and the bottom surface of the drainage body  24  is upwards from the inside to the outside. 
     With the feature disclosed above, referring to  FIG. 1 ,  FIG. 2 ,  FIG. 6 , and  FIG. 7 , when water stream stop valve  20  of the present invention is applied on a pop-up sprinkler  10 , wherein the pop-up sprinkler  10  includes: a main body  11 ; an expansion pipe  12  arranged on the main body  11 , and having a stop member  121  arranged at top internal diameter thereof; a spray head  13  arranged at the top edge of the expansion pipe  12 ; and the water stream stop valve  20  is arranged inside the expansion pipe  12  and below the spray head  13 ; When the spray head  13  fell off, due to the water pressure, the water stream stop valve  20  will be pushed up to the top of the expansion pipe  12  and stop at the stop member  121  for avoiding the overflow of water, maintaining the spraying W 1  at the original area, and delivering a service indication stream W 2 . 
     Also, referring to  FIG. 8 , using the bottom surface of the drainage body  24  to guide the water spraying at the area (a) to be closed to the original spraying area (A) with the spray head  13 , and the hole  241  deliver a service indication stream W 2  for notifying the user the function error of the pop-up sprinkler  10 , and maintaining the spraying W 1  at the original area. 
     Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.