JP4205257B2 - Medium stirring type pulverizer, cleaning apparatus and cleaning method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medium stirring type disperser. In particular, the present invention relates to the cleaning of the outlet screen in a medium agitating crusher.
[0002]
[Prior art]
Finely pulverize minerals, pigments, dyes, chemicals, fillers, magnetic materials such as ferrite, ceramic materials, etc., or disperse fine particles of these materials, for example for paints, printing inks, pigments, magnetic tapes For the purpose of adjusting pharmaceuticals such as coating materials, rubber, adhesives, cosmetics, and coating agents, a medium stirring type pulverizer called a sand mill or a bead mill is frequently used.
[0003]
This type of medium agitating crusher includes a cylindrical vessel having a slurry inlet formed near one end and a slurry outlet formed near the other end, and a cylindrical vessel extending in the length direction of the cylindrical vessel. And a stirring member that is relatively rotatably disposed therein. One end in the axial direction of the agitating member extends outward in the axial direction from the cylindrical vessel, and is driven to rotate by a driving means. A screen is provided at the slurry outlet of the vessel, and a grinding medium formed between the cylindrical vessel and the stirring member is filled with a grinding medium such as glass beads, and the stirring member is rotated relative to the vessel. Then, the slurry is fed from the slurry inlet and discharged from the slurry outlet through the screen.
[0004]
When this medium agitation type pulverizer is used, for example, for the preparation of paints, substances of different varieties are often dispersed in a relatively small lot. In such a case, in order to finish the dispersion treatment of one substance and use the same pulverizer for dispersion of another substance, it is necessary to wash the pulverizer. This cleaning is performed by introducing a cleaning liquid from the slurry inlet while the pulverizer is in operation. According to this cleaning method, the grinding medium and the inside of the grinding chamber can be sufficiently cleaned, but the screen at the slurry outlet is not completely cleaned. In particular, the outer surface of the screen on which the solid content of the slurry tends to adhere does not have a cleaning action, so the screen needs to be removed and cleaned separately. However, since the grinding medium flows out of the vessel when the screen is removed, there is a problem that it becomes necessary to refill the grinding medium after the washed screen is attached, and the operation time becomes longer.
[0005]
[Problems to be solved by the invention]
In the present invention, when a plurality of different substances are dispersed using a medium agitation type pulverizer, it is possible to improve the efficiency of the washing work when switching from the dispersing work for one substance to the dispersing work for another substance, It is an object of the present invention to provide a medium agitation type pulverizer, a cleaning device and a cleaning method thereof that can increase the rate of actual operation time.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a plurality of cleaning liquid spray nozzles so as to face the screen. That is, the medium agitation type pulverizer according to the present invention includes a cylindrical vessel in which a slurry inlet is formed in the vicinity of one end and a slurry outlet is formed in the vicinity of the other end, and a cylinder extending in the length direction of the cylindrical vessel. A stirrer disposed in a cylindrical vessel so as to be rotatable relative to the cylindrical vessel, a driving means for engaging the one axial end of the stirrer to rotationally drive the stirrer, and a slurry outlet of the vessel A slurry provided while a grinding medium formed between a cylindrical vessel and a stirring device is filled with a grinding medium and the stirring device is rotated relative to the vessel. The slurry is fed from the inlet and discharged from the slurry outlet. In the present invention, in this type of medium stirring type pulverizer, a plurality of cleaning liquid injection nozzles are provided so as to face the screen.
[0007]
In a preferred embodiment of the present invention, the screen has a cylindrical shape and is arranged so that the outer periphery faces the grinding chamber at the slurry outlet. An outlet pipe is provided inside the cylindrical screen so as to extend in the axial direction, a cannula is provided so as to surround the outlet pipe, and a nozzle is formed in the cannula. In this case, it is preferable that the inner end of the cylindrical screen in the axial direction is closed by a screen cover plate, and the inner tube is provided with an internal cleaning nozzle that extends through the screen cover plate and extends into the vessel. The stirring device of the pulverizer has a plurality of stirring members protruding outward in the radial direction on its peripheral surface, and a fixing member protruding inward in the radial direction at a position not interfering with the stirring member on the inner peripheral surface of the vessel Is preferably arranged.
[0008]
Still another aspect of the present invention is suitable for a small pulverizer that does not provide a space for disposing the cleaning liquid jet nozzle facing the screen. In this aspect of the present invention, the medium agitating pulverizer is used. A screen cleaning apparatus is provided. This cleaning apparatus is a medium agitating pulverizer in which an outlet pipe has a flange portion that closes an axial outer end portion of a cylindrical screen, and the screen can be removed from the screen while leaving the vessel on the vessel side. A nozzle pipe having a mounting flange having substantially the same shape and dimensions as the flange portion of the outlet pipe and having a nozzle pipe extending in the axial direction from one surface of the mounting flange is provided. And a cleaning liquid introduction pipe for supplying a cleaning liquid to the nozzle pipe through the mounting flange from the other surface side of the mounting flange.
[0009]
Further, the present invention provides a screen cleaning method in a medium agitating type pulverizer, in which the screen is left on the vessel side, the outlet pipe is removed from the screen, and a cleaning nozzle is inserted inside the screen. The slurry outlet side screen is cleaned by spraying the cleaning liquid onto the screen from the outlet side.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention. A medium agitation type pulverizer 1 includes a cylindrical vessel 2 having flanges 3 and 4 formed at both ends in the axial direction. End plates 5 and 6 are respectively attached to the flanges 3 and 4 at both ends of 2. The vessel 2 is arranged such that its cylindrical central axis faces the horizontal direction.
[0011]
Inside the vessel 2, a stirring device including a cylindrical rotating body 8 and a stirring member 9 is disposed. The rotating body 8 has a drive shaft 8 a formed at one end thereof extending through the end plate 5 of the vessel 2 to the outside of the vessel 2. A support member 11 is fixed to the end plate 5 of the vessel 2, and a bearing 14 provided on the support member 11 rotatably supports the drive shaft 8 a of the rotating body 8 with respect to the vessel 2. A pulley 13 is attached to the end of the drive shaft 8a, and the drive shaft 8a is rotationally driven by a power source (not shown) via a belt 12 wound around the pulley 13.
[0012]
The stirring member 9 is attached to the outer periphery of the rotating body 8 so as to protrude radially outward at an appropriate interval. As shown in FIG. 1, a fixing member 10 is attached to the inner periphery of the cylindrical vessel 2 so as to protrude inward in the radial direction at a position between the stirring members 9 provided on the rotating body 8. The rotating body 8 has a cylindrical concave portion 17 formed inward from an axial end opposite to the drive shaft 8 a, and a cylindrical separation screen 18 is disposed in the concave portion 17. One end of the screen 18 in the axial direction is fixed to the end plate 6 of the vessel 2 and supported by the end plate 6. An outlet pipe 16 is inserted into the screen 18. An inlet pipe 15 is disposed at an end portion of the vessel 2 near the end plate 5.
[0013]
A crushing chamber 7 is formed between the vessel 2 and the rotating body 8. The grinding chamber 7 is filled with a grinding medium such as glass beads 2a. In operation, the solid slurry is introduced from the inlet pipe 15 while rotating the rotating body 8 of the stirring device. The introduced slurry reaches the recess 17 formed at the end of the rotating body 8 while receiving a frictional force between the grinding media 2 a stirred by the stirring member 9 of the stirring device, and is discharged from the outlet pipe 16 through the screen 18. Is done. The solid content contained in the slurry is pulverized into fine particles by receiving a frictional force between the pulverizing media 2a. During this time, the slurry undergoes a stirring action, and the pulverized solid fine particles are uniformly mixed in the slurry to be in a dispersed state. The screen 18 functions to separate the slurry from the grinding medium 2a at the outlet of the grinding device 1.
[0014]
Referring to FIG. 2 (a), the screen 18 includes a cylindrical screen member 19, an attachment member 19 a fixed to one end of the screen member 19, and an end plate 29 that closes the other end of the screen member 19. Is done. The attachment member 19a includes a hollow cylindrical portion and an annular flange formed at one end of the cylindrical portion. The cylindrical portion is inserted into a circular hole formed in the end plate 6 of the vessel 2, and the annular flange is formed by a bolt or the like. It is fixed to the end plate 6.
The outlet pipe 16 includes a mounting member 16a composed of a cylindrical portion and an annular flange formed at one end of the cylindrical portion. The cylindrical portion of the mounting member 16a is fitted into the shaft hole of the cylindrical portion of the mounting member 19a, and a bolt or the like. By being fixed to the mounting member 19a of the screen 18 by the fixing means, it is detachably attached to the end plate 6 of the vessel 2. As shown in FIG. 2 (a), the outlet pipe 16 extends into the screen member 19, and the end 20 opens into the screen member 19. Outlet tube 16 has outer tube or cannula 24 disposed radially outwardly at intervals. One end of the cannula 24 is connected to the end of the outlet pipe 16 by a ring-shaped end plate 26. The other end of the cannula 24 is fixed to the end of the cylindrical portion of the attachment member 16a. Thus, an annular space 31 is formed between the outlet pipe 16 and the cannula 24. The annular space 31 is connected to the cleaning liquid supply pipe 21 that penetrates the flange portion of the mounting member 16a.
[0015]
As shown in FIG. 2B, a plurality of nozzles 22 are formed on the wall surface of the cannula 24 at intervals in the circumferential direction. As can be understood from FIG. 2A, the nozzles 23 are also formed at intervals in the axial direction of the sleeve 24. Between the end plate 26 and the end plate 29 of the screen 18, the inlet 30 opens into the space 31, and the injection port 32 opens into the recess 17 of the rotating body 8 that is a part of the crushing chamber in the vessel 2. A nozzle tube 28 is arranged. As shown in FIG. 2B, a plurality of nozzle tubes 28 are provided at intervals in the circumferential direction. Further, the end plate 26 is formed with a nozzle 23 that opens toward the end plate 29. Further, a discharge pipe provided with a discharge valve 36 for discharging the residual liquid is provided at the lower part of the outlet side end of the vessel 2.
[0016]
When processing of a slurry containing one substance as a solid content is completed, and then processing a slurry containing another substance as a solid content, the discharge valve 36 is opened and the residual slurry in the vessel 2 is discharged. It is necessary to clean the inside of the pulverizer 1. In order to perform this cleaning, the cleaning liquid is introduced into the grinding chamber 7 from the slurry inlet 15 while rotating the stirring device. The cleaning liquid is formed at the end of the stirring member 8 while cleaning the inner wall surface of the vessel 2, the rotating body 8 of the stirring device, the stirring member 9 and the fixing member 10, and the grinding medium 2a filled in the grinding chamber 7. After passing through the recessed portion 17, it is discharged from the outlet pipe 16 through the eyes of the screen member 19 of the separation screen 18. In parallel with the introduction of the cleaning liquid from the inlet pipe 15, the cleaning liquid is also introduced from the cleaning liquid introduction pipe 21. Most of the cleaning liquid introduced from the cleaning liquid introducing pipe 21 is ejected from the nozzle 22 toward the exit side surface of the screen member 19, and the deposits on the exit side surface of the screen member 19 are washed away. Further, the remaining portion of the cleaning liquid is sprayed into the recess 17 through the nozzle tube 28 on the end plate 29 of the screen 18, and the inner wall surface of the recess 17 and the grinding medium 2 a in the recess 17 are cleaned.
[0017]
Thus, the structure of this embodiment of the present invention allows the screen to be cleaned without removing the screen 18.
3 and 4 show a second embodiment of the present invention, and portions corresponding to the respective portions of the previous embodiment are denoted by the same reference numerals, and the description is saved. This embodiment can be applied to a small pulverizer in which a space for installing the nozzle mechanism in the screen is not obtained, and the outlet pipe 16 ends at the inner end of the mounting member 16a. As in the previous embodiment, the attachment member 16 a of the outlet pipe 16 is fixed to the end plate 6 of the vessel 2 through the attachment member 19 a of the screen member 19 by a bolt 33. The mounting member 19 a of the screen member 19 is fixed to the end plate 6 of the vessel 2 by a bolt 37.
[0018]
Referring to FIG. 4, in this figure, the outlet pipe 16 in FIG. 3 is removed from the end plate 6 of the vessel 2 with the mounting member 16a and the mounting member 19a of the screen member 19 left. And the nozzle apparatus is attached to the position of the outlet pipe 16 and its attachment member 16a. The nozzle device includes an attachment member 34 including a cylindrical portion that fits into the cylindrical portion of the attachment member 19a of the screen member 19 and a flange formed at one end of the cylindrical portion, and the flange of the cylindrical portion of the attachment member 34 A cylindrical nozzle member 37 whose one end is closed is attached to the opposite end. The nozzle member 37 is formed with a radially outward nozzle opening 22 formed on the circumferential surface of the cylinder and a nozzle opening 23 formed on the end face and parallel to the axial direction of the cylinder. Inside the cylindrical nozzle member 37, the cleaning liquid introduction pipe 21 penetrating the mounting member 34 is connected. An opening / closing valve 35 is provided in the cleaning liquid introduction pipe 21. This nozzle device is attached to the position of the outlet pipe 16 with the outlet pipe 16 and its mounting member 16a removed, and the mounting member 34 is passed through the mounting member 19a of the screen member 19 by a bolt 33 and the end plate 6 of the vessel 2 is attached. Attached to.
[0019]
The operation at the time of cleaning in the second embodiment is the same as that in the previous embodiment in that the cleaning liquid is supplied from the inlet pipe of the vessel 2. Moreover, it is the same as that of previous embodiment also in the point which wash | cleans the surface by the side of the exit of the screen member 19 with the washing | cleaning liquid injected from a nozzle opening. The difference is that in the second embodiment, the cleaning liquid is not sprayed from the nozzle device to the concave member 17 of the rotating body 8 of the stirring device, and the cleaning liquid sprayed from the nozzle opening formed on the end surface of the nozzle member 37 is the screen 18. The end plate 29 hits the wall surface on the outlet side of the end plate 29 and is cleaned.
In any embodiment, the surface on the outlet side of the screen member 19 can be cleaned without removing the screen 18. Therefore, the problems of the prior art can be solved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a crusher according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view showing details of an outlet portion of the crusher according to the embodiment of FIG.
FIG. 3 is a partial cross-sectional view showing details of an outlet portion of a crusher according to a second embodiment of the present invention.
4 is a partial cross-sectional view of an outlet portion of the pulverizer shown in a state where a cleaning device is attached to the pulverizer shown in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grinding device, 2 ... Vessel, 5, 6 ... End plate, 7 ... Grinding chamber,
8 ... Rotating body, 9 ... Stirring member, 10 ... Fixed member,
15 ... Inlet pipe, 16 ... Outlet pipe, 18 ... Screen,
19: Screen member, 22, 23 ... Nozzle opening, 24 ... Cannula,
28 ... Nozzle tube,

Claims (6)

A cylindrical vessel having a slurry inlet formed in the vicinity of one end and a slurry outlet formed in the vicinity of the other end, and the cylindrical vessel in the cylindrical vessel extending in the length direction of the cylindrical vessel. A stirrer disposed so as to be relatively rotatable, a driving unit that engages with one axial end of the stirrer to rotationally drive the stirrer, and a screen provided at the slurry outlet of the vessel. The pulverization chamber formed between the cylindrical vessel and the stirring device is filled with a pulverizing medium, and the slurry is fed from the slurry inlet while rotating the stirring device relative to the vessel. in medium-stirring type pulverizer so as to discharge the slurry from the outlet, wherein the screen is a cylindrical, so as to face the inner surface of the screen to the inside of the screen, Medium-stirring type pulverizer, wherein the tubular member with several cleaning solution spray nozzles are provided. The crusher according to claim 1, wherein the screen is disposed so that an outer periphery thereof faces the crushing chamber at the slurry outlet, and an outlet pipe is provided in the cylindrical screen so as to extend in the axial direction. is, the tubular members crusher, characterized in that it is arranged so as to surround the outlet tube. 3. The crusher according to claim 2, wherein an axial inner end of the cylindrical screen is closed by a screen cover plate, and the tubular member extends through the screen cover plate and into the vessel. A crusher characterized in that an internal cleaning nozzle is provided.   4. The pulverizer according to claim 1, wherein a plurality of stirring members projecting radially outward are formed on a peripheral surface of the stirring device, and the inner portion of the vessel is formed. A crusher characterized in that a fixing member protruding inward in the radial direction is disposed on a circumferential surface at a position where it does not interfere with the stirring member. A cylindrical vessel having a slurry inlet formed in the vicinity of one end and a slurry outlet formed in the vicinity of the other end, and the cylindrical vessel in the cylindrical vessel extending in the length direction of the cylindrical vessel. A stirrer disposed so as to be relatively rotatable, a driving unit that engages with one axial end of the stirrer to rotationally drive the stirrer, and a screen provided at the slurry outlet of the vessel. The pulverization chamber formed between the cylindrical vessel and the stirring device is filled with a pulverizing medium, and the slurry is fed from the slurry inlet while rotating the stirring device relative to the vessel. in medium-stirring type pulverizer so as to discharge the slurry from the outlet, wherein the screen is cylindrical, positioned as the outer periphery in the slurry outlet facing the grinding chamber And an outlet pipe is provided so as to open inside the cylindrical screen, and a pulverization medium is filled in a pulverization chamber formed between the cylindrical vessel and the agitator, and the agitator is The slurry is fed from the slurry inlet while being rotated relative to the vessel, and the slurry is discharged from the slurry outlet through the outlet pipe. The outlet pipe is an axial outer end portion of the cylindrical screen. A cleaning device for the screen in a medium agitating pulverizer that can be detached from the screen while leaving the screen on the vessel side, and a flange portion of the outlet pipe A nozzle pipe having a mounting flange having substantially the same shape and size, and extending in the axial direction from one surface of the mounting flange is provided. A plurality of nozzles are formed, the cleaning apparatus characterized by cleaning liquid introducing pipe for supplying a cleaning liquid to the nozzle tube through the mounting flange from the other surface side of the mounting flange is provided. A cylindrical vessel having a slurry inlet formed in the vicinity of one end and a slurry outlet formed in the vicinity of the other end, and the cylindrical vessel in the cylindrical vessel extending in the length direction of the cylindrical vessel. A stirrer disposed so as to be relatively rotatable, a driving unit that engages with one axial end of the stirrer to rotationally drive the stirrer, and a screen provided at the slurry outlet of the vessel. The pulverization chamber formed between the cylindrical vessel and the stirring device is filled with a pulverizing medium, and the slurry is fed from the slurry inlet while rotating the stirring device relative to the vessel. in medium-stirring type pulverizer so as to discharge the slurry from the outlet, wherein the screen is cylindrical, positioned as the outer periphery in the slurry outlet facing the grinding chamber And an outlet pipe is provided so as to open inside the cylindrical screen, and a pulverization medium is filled in a pulverization chamber formed between the cylindrical vessel and the agitator, and the agitator is The slurry is fed from the slurry inlet while being rotated relative to the vessel, and the slurry is discharged from the slurry outlet through the outlet pipe. The outlet pipe is an axial outer end portion of the cylindrical screen. A cleaning method for the screen in a medium agitating pulverizer that can be removed from the screen while leaving the screen on the vessel side, and the screen is placed on the vessel side. The outlet pipe is removed from the screen, and a cleaning nozzle is inserted inside the screen to allow cleaning liquid to flow into the screen. Screen cleaning method in medium-stirring type pulverizer, characterized in that for cleaning of the slurry outlet screen by blowing from the mouth side.

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