Abstract:
An emulsifying and dispersing arrangement is provided, in which a handled material undergoes multi-time handling and a dispersion process, for achieving dispersion characteristics exhibiting uniformity of particle size. In addition, the temperature generated in the arrangement is controllable.

Description:
The present application claims priority based on Japanese Patent Application No. 2008-273489 filed on Oct. 23, 2008. The full disclosure of Japanese Patent Application No. 2008-273489 is hereby expressly incorporated by reference into the present specification. In the event of any errors in translation, or other conflicts, if any, between the present specification and Japanese Patent Application No. 2008-273489, the Japanese application shall be considered controlling. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to technologies concerned with arrangements for rotary emulsifying and dispersing. 
     2. Description of the Related Art 
     Rotary emulsifying and dispersing arrangements are widely used in industry. Previously used arrangements commonly contain a suction inlet like that of a centrifugal water pump, and in a casing contains impellers on the rotor thereof, similar to the impellers of a centrifugal water pump. The handled material is sucked into the casing upon turning of a rotor, and then the material is spiraled away from the rotor and hits upon a stator, which is set outside of the rotor, after achieving a given centrifugal power from the impellers of the rotor. The material finally is emulsified, dispersed and agitated, and is discharged from an outlet under pressure from the centrifugal power. 
     In order to achieve a dispersion property having a uniform granular size, the rotor and stator either are constructed as a multi-stage type, like that of a multi-stage pump, or are constructed so as to connect the suction inlet in the dispersing arrangement with a retrieval tank into which the material is dischargeable, so that the material can be redirected into the arrangement, and be treated a plurality of times and thus achieve a uniform granular size. However, when a multi-stage rotor is applied, high pressure will occur similar to multi-stage pumping functions. Therefore, reasonably, cooling water for a mechanical seal in such an arrangement should be highly pressurized, and an auxiliary supercharging pump, which is used for pressuring the arrangement, is a must. Also, redirection of material from the retrieval tank into the arrangement makes the system an open system. Thus, it is difficult to achieve a continuous process, as in a closed system. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a dispersing arrangement, in which a material can achieve and undergo random multi-time handling in a continuous process, in a closed loop system, without generating high pressure. 
     In order to achieve the above object, the rotary emulsifying and dispersing arrangement functions in a similar manner as a centrifugal water pump, because centrifugal power is generated by turning of a rotor. The principles of a previously used dispersion arrangement are shown in  FIG. 3 , whereas the principles of the present invention are shown in  FIG. 1 . A flow channel  6 , which runs through a stator  2 , is constructed in front of the first stator  2 - 2  in the casing  5  of the arrangement, so that the handled material, which is discharged from the last rotor  1 - 1 , can be redirected into the suction inlet via the flow channel  6 , whereupon depressurizing at the suction inlet is achieved. 
     EFFECTS OF THE INVENTION 
     As mentioned above, the handled material, which is discharged from the last rotor  1 - 1 , becomes depressurized at the suction inlet in the first rotor  1 - 2  via the flow channel  6 , which is configured so as to run through the stator in front of the first stator  2 - 2  in the casing  5 . By adjusting the clearance of the flow channel  6 , the pressure that occurs in the casing  5  of the dispersing arrangement also can be adjusted. Furthermore, a uniform particle size can be achieved in the handled material, which is discharged from the last rotor  1 - 1 , and the handled material undergoes reagitation and redispersion, thereby acquiring improved properties of dispersion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a concerned principle view of the present invention; 
         FIG. 2  is a principle view showing placement of a check valve in the present invention; 
         FIG. 3  is a principle view of a conventional and previously used emulsifying and dispersing arrangement; 
         FIG. 4  is a structural view of the present invention; 
         FIG. 5  is a structural view illustrating placement of a barrier shelf in the present invention; and 
         FIG. 6  is a structural view showing placement of a check valve  9  in the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As shown in  FIG. 4 , the present invention is constituted by a casing  5  that is situated firmly on a base, fixed stators  2 , an outlet  3  having an outlet axis  30 , a freely-turnable shaft  4  having a shaft axis  40 , and rotors  1  that turn together with the shaft  4 . Also, the handled material, which is discharged from the last rotor  1 - 1 , is redirected into the suction inlet in the first rotor  1 - 2  via a flow channel  6 , which is constructed so as to run through the stator prior to the first stator  2 - 2  in the casing  5 . By adjusting the clearance of the flow channel  6 , the pressure that occurs in the casing  5  of the arrangement can also be adjusted. As shown in  FIG. 6 , apertures  15  between the rotors  1  and the stators  2  extend radially from the shaft axis  40 . Rotor outshoots  10  extend from the rotors  1  and are generally parallel to shaft axis  40 . Similarly, stator outshoots  20  extend from the stators  2  and are generally parallel to shaft axis  40 . 
     The flow channel  6  in the inner-circulation emulsifying and dispersing arrangement can also include a check valve  9 , as shown in  FIG. 6 , in order to control the pressure inside the casing  5 .  FIG. 2  is a schematic structural illustration showing such an arrangement. 
     The handled material inside the casing  5  rotates toward the outlet  3  with different rotating diameters, according to different specific gravities of the particles. As shown in  FIG. 5 , the present invention is designed so as to move the outlet  3  prior to the flow channel  6 , while setting a barrier shelf  7  between the flow channel  6  and the outlet  3 . Most importantly, a gradual pore  8 , which is set at a different place in the barrier shelf  7 , will allow only a material having a set fineness to run therethrough, while the remaining material still undergoes agitation and dispersion after being redirected via the flow channel  6 . 
     INDUSTRIAL APPLICABILITY 
     According to the above-described inner-circulation structure, the pressure that occurs in the casing  5  can effectively be controlled without the need for supplying cooling water for the mechanical seal from a supercharging pump, irrespective of whether the stages of the rotor are increased or the rotation rate is increased. Also, the handled material undergoes reagitation and redispersion after running back via the flow channel  6 , thereby achieving improved dispersion characteristics. 
     Furthermore, placement of the barrier shelf  7  and the gradual pore  8  permit only materials having a certain fineness to run therethrough, while the remaining material undergoes reagitation and redispersion. The arrangement thus enjoys a function of graduation, in order to improve the dispersion characteristics. 
     DESCRIPTION OF REFERENCE NUMBERS CHARACTERS 
     
         
           1  rotor 
           1 - 1  last rotor 
           1 - 2  first rotor 
           2  stator 
           2 - 1  last stator 
           2 - 2  first stator 
           3  outlet 
           4  shaft 
           5  casing 
           6  flow channel 
           7  barrier shelf 
           8  gradual pore 
           9  check valve 
           10  rotor outshoot 
           15  aperture 
           20  stator outshoot 
           30  outlet axis 
           40  shaft axis