Abstract:
A composite structure of rotary valve is provided, which includes a body including the containing hole of the disc, and a metal body according to the shape of body formed in the body and covered by the body, wherein the metal body improves the explosion-proof, pressure-proof, and acid/base-resistant strength and circularity of the valve body in the manufacturing process of the rotary valve, the circularity of the body is conducive to connect with a pipe line. A stem is mounted on the disc, wherein the stem is extended upwardly and combined with handle/gear/electric/pneumatic/hydraulic, or chain operation component, such that the disc can be opened or closed.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to the composite structure of a rotary valve, in particular to a metal body formed in the rotary body and completely covered by the body, wherein to improve the explosion-proof, pressure-proof, and acid/base-resistant and keep the circularity of the body in the manufacturing process, thus is conducive to connect with a pipe, and archives a structural innovation of the rotary valve with the benefit of controlling the rotary valve to control the liquid flowing or not. 
       DESCRIPTION OF RELATED ART 
       [0002]    According to commercially available rotary valves, the bodies thereof are made of plastic material, such as ABS plastic material (ACRYLONITRILE-BUTADIENE-STYRENE, propylene, butadiene and styrene copolymer), each body includes a disc which is capable to rotate and determine liquid flowing or not, and the body is made of plastic material to provide excellent fluidity and color uniformity in the heating and melting process and has advantages of non-toxic, toughness and impact resistance. The ABS plastic material has the above advantages, but the manufacturer has to consider how to increase the forming thickness of the body for ensuring that the body can withstand high pressure of flowing fluid in the pipe with the characteristics of the plastic material. In the injection molding process, plastic material has to be molded in very short time without deformation. Thus, people doing their utmost to improving the structural strength of traditional rotary valve. However, increasing the thickness of the valve body causes risks of increasing the rate of defective unit and decreasing the rate of non-defective unit in the manufacturing process. Secondly, since the rotary valve is made of plastic material, which pressure resistant is inadequate, that delivery of high-pressure liquid can not be applied, could easily lead to problems of leakage fault. 
         [0003]    And to increase the pressure-resistant strength of the rotary valve itself, there is the structure of the body made of metal material. Its advantage is great resistant to pressure, but the drawback is easy to rust, heavy weight; construction is not easy, and vulnerably impacted by environmental pH value, as a result, is damaged by erosion. 
         [0004]    Therefore, the inventor of the present invention with many experiences of product designing and manufacturing researched the structural problem of the above rotary valve, and invents the rotary valve of the present invention to solve the above problem. 
       SUMMARY OF THE INVENTION 
       [0005]    The main objective of the present invention is to provide a structural innovation of the composite structure for a rotary valve with good structural strength, pressure-resistant, and enough to resist the pH of the environment to prolong life, moderate weight, easy construction, but also to improve product quality. 
         [0006]    To archive above objective, the composite structure of a rotary valve of the present invention is included the containing hole of the disc of the body, which is including a valve seat for matching the containing hole of the disc, and a metal valve body is formed in the body and covered by the body, wherein the metal valve body improves the explosion-proof and pressure-resistant strength and circularity of the valve body in the manufacturing process of the rotary valve, the circularity of the valve body is conducive to connect with a pipe line, thus provides benefit of controlling the rotary valve to control the liquid flowing or not. 
         [0007]    The composite structure of a rotary valve of the present invention can be widely used in all kinds of rotary valve, such as handle/gear/electric/pneumatic/hydraulic, or chain operation, so that the disc can be opened or closed. 
         [0008]    The metal body of the rotary valve of the present invention located in the valve body is designed according to the shape of the valve body. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]      FIG. 1  is a side view of the handle-operation rotary valve of the present invention; 
           [0010]      FIG. 2  is a side view of the body of the rotary valve of embodiment 1 of the present invention; 
           [0011]      FIG. 3  is a cross sectional view of the cutting line A-A in  FIG. 2 ; 
           [0012]      FIG. 4  is a cross sectional view of the cutting line B-B in  FIG. 2 ; 
           [0013]      FIG. 5  is a side view of the metal valve of embodiment 1 of the present invention; 
           [0014]      FIG. 6  is a front view of the metal valve of embodiment 1 of the present invention; 
           [0015]      FIG. 7  is a front view of the metal valve of embodiment 2 of the present invention; 
           [0016]      FIG. 8  is a cross sectional view of the cutting line C-C in  FIG. 7 ; 
           [0017]      FIG. 9  is a cross sectional of embodiment 2 of the present invention combined with valve body; 
           [0018]      FIG. 10  shows a rotary valve body applying the present invention in gear operation; 
           [0019]      FIG. 11  shows a rotary valve body applying the present invention in pneumatic operation; 
           [0020]      FIG. 12  shows a rotary valve body applying the present invention in electric operation. 
       
    
    
     FIGURES 
       [0021]    Representative figure:  FIG. 3   
         [0022]    Symbols of representative figure: 
         [0023]    valve body  1 , valve stem groove  1   a , containing hole  10 , encircled body  11 , ribs  111 , encircled neck  12 , operation component base  13 , through hole  120 , metal valve body  3 , encircled part  30 , operation component setting part  32 , via hole  320   
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0024]    Herein below preferred the composite structure of the rotary valve of the present invention will be described in detail with reference to the accompanying drawings. 
         [0025]      FIG. 1  is shown an embodiment of the composite structure of the handle-operation rotary valve of the present invention. The present invention can be not only used in the embodiment of the rotary valve in  FIG. 1 , but also can be used in other type rotary valve, such as gear operation (with referred to  FIG. 10 ), or pneumatic operation (with referred to  FIG. 11 ), or electric operation (with referred to  FIG. 12 ), or hydraulic operation or chain operation component rotary valve. The rotary valve of the present invention comprises body  1 , and containing hole of the disc  10  is formed for the disc  2 ; the disc  2  comprises the stem  20 , which is extended downwardly from handle operation component  21 , or gear operation (with referred to  FIG. 10 ) or pneumatic operation (with referred to  FIG. 11 ), or electric operation (with referred to  FIG. 12 ), or hydraulic operation, or chain operation component, and pass through disc  2 , whereby the distal end of which is located in the stem groove la of the body  1 , and fixed by a nut  22  over the handle  21 , such that the disc  2  can be rotated to open or close by controlling the handle  21 . 
         [0026]    With referred to  FIG. 2-4 , the value body  1  is made of ABS plastic material, such as ACRYLONITRILE-BUTADIENE-STYRENE, propylene, butadiene and styrene copolymer, the body  1  is also available made of other suitable plastic materials. The body  1  comprises an encircled body  11  which includes multiple bolt holes  110  formed on the encircled body  11  and providing the body  1  fixed by bolts with the need of the use of the environment. Multiple ribs  111  is formed on the surfaces of both sides of the encircled body  11  and improving the impact resistance of the body  1 ; an encircled neck  12  is formed on the body  1  and comprising a operation component base  13  formed on the upper end of the encircled neck  12 . A through hole  120  is formed between the containing hole of the disc  10  and the operation component base  13  and providing the stem  20  capable to perforate through the through hole  120  easily. A metal valve  3  is located in the body  1  and covered by the body  1 . 
         [0027]    With referred to  FIG. 4-6 , showing embodiment 1 of metal value body  3 ; the metal valve body  3  is an integrally molded structure. The rotary valve further comprises an encircled part  30  with multiple via holes  300  thereon, and the encircled part  30  is designed for fitting the encircled body  11  of the body  1 , whereby the via holes  300  of the encircled part  30  are corresponded to the bolt holes  110  of the encircled body  11  of the body  1 . A neck  31  is formed on the encircled part  30  and comprising a passage  310  formed on the neck  31  for coordinating the encircled neck  12  of the body  1  and the through hole  120  thereof. An operation component setting part  32  is mounted on the neck  31  and comprising multiple via holes  320  for matching the operation component base  13  of the body  1 . 
         [0028]    With referred to  FIG. 7-9 , showing embodiment 2 of metal value body  3 , and the embodiment 2 of metal valve body  3   a  is more suitable for large rotary valve; of course it could be used in a small rotary valve too. The metal valve body  3  is an integrally molded structure. The rotary valve further comprises an encircled part  30  with multiple via holes  300  thereon, and the encircled part  30  is designed for fitting the encircled body  11  of the body  1 , whereby the via holes  300  of the encircled part  30  are corresponded to the bolt holes  110  of the encircled body  11  of the body  1 . An upper neck  31   a  is formed on the encircled part  30 ; the upper neck  31   a  is an encircled shape, slightly different from the neck  31  of embodiment 1, comprising a through hole  310   a  for matching the encircled neck  12  of the body  1  and the through hole  120  thereof. With referred to  FIG. 9 , multiple elongated holes  312  are formed on the encircled wall  311  of upper neck  31   a  in order to enable the body  1 , while molding, to completely cover the upper neck  31   a,  and avoid the destruction of metal valve body  3   a  due to environmental pH value. An operation component setting part  32  is mounted on the neck  31   a  and comprising multiple via holes  320  for matching the operation component base  13  of the valve body  1 . A lower neck  33  is formed on the encircled part  30 ; the upper neck  31   a  is an encircled shape corresponding to the setting location and shape of the upper neck  31   a,  and comprising the via hole  330  for matching downwardly formation of the stem  20  of the body  1 . With referred to  FIG. 9 , multiple elongated holes  332  are formed on the encircled wall  311  of lower neck  33  in order to enable the body  1  to completely cover the lower upper neck  33 , and avoid the destruction of metal valve body  3   a  due to environmental pH value. As for the combination of encircled part  30 , upper neck  31   a  and lower neck  33  of metal valve body  3   a  shall be either by welded or connected way. With referred to  FIG. 7  and  FIG. 8 , to combine the encircled part  30  and the upper neck  31   a,  slots  313  are formed at two sides of upper neck  31   a , wherein the upper end of encircled part  30  is set, and then welded or connected integrally. With referred to  FIG. 7  and  FIG. 8 , to combine the encircled part  30  and the lower neck  33 , slots  313  are formed at two sides of lower neck  33 , wherein the lower end of encircled part  30  is set, and then welded or connected integrally. 
         [0029]    In summary, the metal valve body  3  has to be put in a mold of the body  1  before molding the valve  1  with referred to  FIG. 2  and  FIG. 9 . The metal valve bodies  3  and  3   a  are covered by the valve body  1  after the valve body molded. Thus, the metal valve bodies  3  and  3   a  improve the structural strength of the valve body  1  without increasing the thickness of the valve body  1 . The shape of the metal valve body  3  is corresponding to the shape of the body, such that the body is capable to sustain higher liquid flow pressure of pipe and increase the explosion-proof and pressure-resistant strength thereof, with the advantages of both plastic and metal valve bodies. Without increasing the thickness of the body in the manufacturing process, the consumption of the plastic material can be maintained, and the body can be rapid forming and molding, such that the liquid in the pipe cannot leak and can avoid environmental contamination or waste of water resources. 
       DESCRIPTION OF SYMBOLS 
       [0030]    body  1 , stem slot  1   a , containing hole of the disc  10 , encircled body  11 , bolt holes  110 , ribs  111 , encircled neck  12 , operation component base  13 , via hole  120 , disc  2 , stem  20 , handle  21 , nut  22   
         [0031]    metal valve body  3 , encircled part  30 , through holes  300 , neck  31 , passage  310 , operation component setting part  32 , through holes  320 ,
       metal valve body  3   a,  upper neck  31   a,  via holes  310   a,  encircled wall  311 , elongated hole  312 , slot  313 , lower neck  33 , via holes  330 , encircled wall  331 , elongated hole  332 , slot  333 .