JP2005324126A - Pulverizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulverizer for obtaining a fine powder having finer and more uniform particle size without bringing about an increase in cost, the lowing of the quality of the fine powder and the lowering of the production efficiency of the fine powder. <P>SOLUTION: The pulverizer is constituted by providing a first frame like member 5, which protrudes forward and turns its opening part 5a toward the inner peripheral surface of a liner 2, to one plate surface 4a turned forward in the rotational direction of a rotor 3 and a second inner peripheral surface 6, which protrudes rearward and turns its opening part 6a toward the inner peripheral surface of the liner 2, to the other plate surface 4b turned rearward in the rotational direction of the rotor 3 of the leading end part of the grinding plate 4. Further, the interval between the grinding plate 4 and the liner 2 is stepwise narrowed from an air inflow port 11a to an air outflow port 13a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fine pulverizer that pulverizes solids such as food, wood, and resin into a fine powder using a pulverizing plate that rotates at high speed.

  This type of pulverizer includes a stator housing having a cylindrical body, a cylindrical liner fitted to the inner surface of the body of the stator housing, and a rotor provided coaxially in the liner. And a plurality of grinding plates provided in the axial direction and the circumferential direction in the outer peripheral portion of the rotor are known (see, for example, Patent Documents 1, 2, and 3).

The liner has a plurality of fixed blades extending in the axial direction projecting from the inner surface at intervals in the circumferential direction.
The crushing plate has its plate surface oriented in the direction of rotation by the rotor, and has a radially outer tip approaching the fixed blade of the liner to about 2 to 3 mm.

  In the fine pulverizer configured as described above, the plurality of pulverization plates are swung at high speed along the inner peripheral surface of the liner along with the rotation of the rotor. In addition, vortex flow caused by high-speed air, high-pressure and high-frequency air vibration, and the like can be generated behind the swirl direction.

  For this reason, when a solid pulverized raw material (object to be pulverized) is supplied in the stator housing on the flow of air moving from one end side to the other end side in the axial direction, the air and the pulverized raw material are mixed with the pulverizing plate and the liner. The crushed raw material is rapidly crushed in the course of the movement from the one end side to the other end side.

  That is, the pulverized raw material receives a large impact force, shearing force, compressive force, etc. due to the vortex flow or air vibration, etc., and collides with or grinds with a pulverizing plate or liner, and collides or grinds each particle of the pulverized raw material. Therefore, it is pulverized to a particle size of about several μm to several hundred μm.

  However, in the conventional fine pulverizer, the flat pulverized plate is simply configured to be swung at a high speed along the inner peripheral surface of the liner. In order to obtain a fine powder with a finer and more uniform particle size, the grinding plate can be rotated at a higher speed, the interval between the liner and the grinding plate can be narrowed, or the supply amount of air and grinding raw material can be limited to reduce the grinding time. It is necessary to take measures such as lengthening

  However, in order to rotate the grinding plate at a higher speed, it is necessary to balance the mass around the axis of the rotor more precisely, and it is necessary to improve the dimensional accuracy of each component constituting the rotor and the grinding plate. There is a problem that this causes an increase in cost. In addition, since the amount of heat generation is increased and pulverization is performed in a high temperature atmosphere, there is a problem that the quality of the fine powder as a product is deteriorated.

  Further, when the interval between the liner and the pulverizing plate is narrowed, there is a problem that the amount of heat generation increases and the amount of movement of the pulverized raw material decreases, so that the quality and production efficiency of the fine powder are lowered.

Furthermore, when the supply time of the air and the pulverized raw material is limited to increase the pulverization time, there is a problem that the production efficiency of the fine powder is surely lowered.
Japanese Patent Laid-Open No. 11-276916 JP 2000-42438 A German Patent DE3811910A1

  The present invention has been made in view of the above circumstances, and the finer and more precise without increasing the cost due to higher accuracy of each component, lowering the quality of fine powder due to high temperature, and lowering the production efficiency of fine powder. It is an object to provide a pulverizer capable of obtaining fine powder having a uniform particle diameter.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a stator housing having a cylindrical body, a cylindrical liner fitted to the inner surface of the body of the stator housing, and the liner A rotor disposed coaxially with the liner on the inner side, and a plurality of outer peripheral portions of the rotor are provided at intervals in the axial direction and the circumferential direction of the rotor, and the plate surface is directed in the rotation direction by the rotor. And a pulverizer having a radially outer tip from the rotor and a pulverizing plate close to the inner peripheral surface of the liner, the tip of the pulverizing plate facing the tip in the rotational direction. A first frame-like member is provided on one plate surface so as to protrude forward and the opening is directed to the inner peripheral surface side of the liner. Protruding into the opening It is characterized in that the second frame-shaped member that is toward the inner surface side of the liner is provided.

  According to a second aspect of the present invention, there is provided a stator housing having a cylindrical body, a cylindrical liner fitted to the inner surface of the body of the stator housing, and coaxial with the liner inside the liner. And a plurality of rotors arranged on the outer periphery of the rotor at intervals in the axial direction and the circumferential direction of the rotor, the plate surface being directed in the rotational direction by the rotor, and a radius from the rotor A fine pulverizer provided with a pulverization plate having a tip on the outer side in the vicinity of the inner peripheral surface of the liner, wherein the pulverization plate has an interval between the pulverization plate and the liner in one of the axial directions of the barrel portion. It is characterized in that it is installed in the rotor so as to narrow in a stepwise manner from the arranged air inlet side toward the air outlet side arranged on the other axial side of the body portion.

  According to a third aspect of the present invention, in the first aspect of the present invention, the pulverizing plate may be provided from an air inlet side in which an interval between the pulverizing plate and the liner is arranged in one of the axial directions of the body portion. It is characterized by being installed in the rotor so as to be narrowed stepwise toward the air outlet side disposed on the other axial side of the body portion.

  The invention described in claim 4 is characterized in that, in the invention described in any one of claims 1 to 3, irregularities are alternately formed in the circumferential direction on the inner peripheral surface of the liner.

  According to a fifth aspect of the present invention, in the first, third, or fourth aspect of the invention, the first frame-shaped member has one end in the width direction that coincides with the axial direction of the rotor on the one plate surface. The second frame-shaped member protrudes from one end portion in the width direction on the other plate surface and protrudes from the other end portion in the width direction. It is formed so that it may return to.

  According to a sixth aspect of the present invention, in the first, third, fourth, or fifth aspect of the present invention, the pulverization plate includes a base end side pulverization plate portion positioned radially inward from the rotor, and the base. It is provided with the end side crushing board part so that attachment or detachment is possible, The front side crushing board part which has the said 1st frame-shaped member and the said 2nd frame-shaped member is provided.

  The invention according to claim 7 is the invention according to claim 1, 3, 4, 5 or 6, wherein the first frame-shaped member and the second frame-shaped member which are adjacent in the circumferential direction of the rotor, It is characterized by having a connecting member for connecting the two.

  According to invention of Claim 1, 3, 4, 5, 6 or 7 comprised as mentioned above, the 1st frame-shaped member which protrudes in the front-end | tip part of a rotation direction at the front-end | tip part of a grinding | pulverization board is back. And the second frame-shaped member, the plurality of pulverizing plates, the first frame-shaped member, and the second frame-shaped member rotate at high speed along the inner peripheral surface of the liner as the rotor rotates. Will do. For this reason, high-speed air in a more disturbed state compared to the conventional example at the tip position, side edge position, rearward direction of the turning direction, and the like of the pulverizing plate, the first frame-shaped member, and the second frame-shaped member Eddy currents and high-pressure high-frequency air vibrations can be generated.

  As a result, a larger impact force, shear force, compression force, or the like can be applied to the object to be pulverized passing between the pulverization plate and the liner by a more disturbed vortex or air vibration. In addition, the chance that the particles of the pulverized object are pulverized or ground by collision can be greatly increased, and the pulverized object can be pulverized by the pulverizing plate, the liner, the first frame member, and the second frame. Opportunities for crushing and grinding by colliding with the frame-shaped member can be significantly increased.

  In this case, since it is not necessary to increase the rotational speed of the rotor, conventional rotors and pulverized plates can be used, and the amount of heat generated does not increase. Therefore, the cost does not increase, and the quality of the fine powder does not deteriorate due to high temperature.

  In addition, since it is not necessary to reduce the distance between the liner and the pulverizing plate, the amount of heat generated does not increase, and the amount of movement of the pulverized object does not decrease. Therefore, the quality and production efficiency of fine powder are not reduced.

  Furthermore, it is not necessary to lengthen the pulverization time by limiting the supply amount of air or the object to be pulverized, so that the production efficiency of the fine powder is not lowered.

  Therefore, it is possible to finely pulverize the object to be pulverized without causing an increase in cost due to high precision of each part, a decrease in fine powder quality due to a high temperature and a decrease in fine powder production efficiency, and more uniform. It can be pulverized to a small particle size. In addition, since it is not necessary to increase the precision of the parts, it is easy to cope with an increase in the size of the pulverizer.

  According to the second aspect of the present invention, the gap between the pulverizing plate and the liner is such that the air disposed on the other side in the axial direction of the body portion from the air inlet side disposed on one side in the axial direction of the body portion. Since the pulverization plate is installed on the rotor so as to narrow in a stepwise manner toward the outlet side, the pulverized object can be pulverized successively and finely, and the pulverized object can be efficiently pulverized.

  For this reason, by narrowing the distance between the final stage pulverization plate located on the air outlet side and the liner, even when obtaining finer powder with a finer and more uniform particle size, An increase in the amount of heat generation can be suppressed, and a decrease in the production amount of fine powder can be suppressed.

  Further, it is not necessary to increase the rotational speed of the rotor or limit the supply amount of air and the object to be crushed in order to obtain finer powder having a finer and more uniform particle size.

  Therefore, as in the first aspect of the invention, the finer and more uniform without increasing the cost due to the higher accuracy of each part, lowering the quality of the fine powder due to high temperature, and lowering the production efficiency of the fine powder. Fine powder having a particle size can be obtained. Further, since it is not necessary to increase the precision of the parts, it is easy to increase the size of the fine pulverizer.

  According to the third aspect of the present invention, the gap between the pulverizing plate and the liner is such that the air disposed on the other side in the axial direction of the body portion from the air inlet side disposed on one side in the axial direction of the body portion. Since the first frame-like member and the second frame-like member are provided on the pulverizing plate attached to the rotor so as to narrow gradually toward the outflow side, finer and more uniform grains Fine powder having a diameter can be obtained, and the production efficiency of the fine powder can be improved.

  According to the invention described in claim 4, since the irregularities are alternately formed in the circumferential direction on the inner peripheral surface of the liner, vortex flow due to high-speed air in a more disturbed state, high-pressure high-frequency air vibration, etc. Can be made. Therefore, fine powder with a finer and more uniform particle diameter can be obtained, and the production efficiency of the fine powder can be improved.

  According to the invention described in claim 5, the first frame-like member is formed so as to protrude from one end portion in the width direction on one plate surface and return to the other end portion in the width direction, Since the frame member is formed so as to protrude from one end portion in the width direction on the other plate surface and return to the other end portion in the width direction, the first frame shape disposed over the entire width in the width direction of the pulverization plate By the member and the second frame-like member, the air stirring action can be further enhanced. Therefore, fine powder with a finer and more uniform particle diameter can be obtained, and the production efficiency of the fine powder can be improved.

  According to the sixth aspect of the present invention, the crushed plate is disposed on the inner side in the radial direction from the rotor, and is detachably provided on the proximal side crushed plate portion, and the first frame 1st frame shape of the shape which can grind | pulverize efficiently according to the kind of grinding | pulverization target object since it has the structure provided with the front side crushing board part which has a shape member and a 2nd frame-shaped member. It can be easily changed to the member, the second frame-like member, and the tip side crushing plate portion.

  In addition, since only the tip portion of the pulverizing plate, the first frame-like member 5 and the second frame-like member 6 which are easily consumed can be replaced by attaching and detaching the tip-side pulverizing plate portion, the running cost is reduced. be able to.

  According to the invention described in claim 7, since the connecting member that connects the first frame-shaped member and the second frame-shaped member adjacent in the circumferential direction of the rotor is provided, the first frame-shaped member, The strength of the second frame-shaped member and the pulverizing plate can be improved.

  In addition, when the pulverization plate is constituted by the base end side pulverization plate portion and the distal end side pulverization plate portion, the pulverization plate has a plurality of first frame-like members and second frame-like members connected by a connecting member. Since the front end side crushing plate portion can be attached to and detached from the base end side crushing plate portion at a time, the number of assembling steps can be reduced. In addition, since the worn out first frame-shaped member, second frame-shaped member, and the like can be easily replaced in a short time, the operating rate can be improved.

(First embodiment)
A first embodiment as the best mode for carrying out the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 4, the pulverizer shown in the first embodiment is fitted to the stator housing 1 having a cylindrical body 10 and the inner surface of the body 10 of the stator housing 1. The cylindrical liner 2 formed, the rotor 3 disposed coaxially with the liner 2 inside the liner 2, and a constant interval in the axial direction and the circumferential direction of the rotor 3 on the outer peripheral portion of the rotor 3. The crushing plate 4 is provided with a plurality of plate surfaces 4 a and 4 b oriented in the rotational direction of the rotor 3, and a radially outer tip 4 c from the rotor 3 close to the inner peripheral surface of the liner 2. The crushing plate 4 includes a first frame-like member 5 at the front end portion of the crushing plate 4 which protrudes toward the front side of the plate 4a facing in the rotational direction and the opening 5a faces the inner peripheral surface of the liner 2. And is provided after the rotational direction The second frame member 6 to the opening 6a is directed toward the inner circumferential surface of the liner 2 protrudes to the rear is provided on the other plate surface 4b facing.

  The stator housing 1 has an intermediate wall portion 11 having an air inlet 11 a at one position in the axial direction of the body portion 10, and further has an end wall portion 12 at one position. The other end wall portion 13 having the air outlet 13a at the other position in the direction is provided.

  The air inflow port 11a is opened in the axial center portion of the intermediate wall portion 11, so that a later-described rotating shaft 31 of the rotor 3 can be inserted. The air inlet 11a is connected to an air supply duct 71 for supplying air.

  The one end wall portion 12 is provided with a bearing holding portion 12a at the axial center portion thereof. The bearing holding portion 12a is provided with a bearing 31a that rotatably supports a portion of the rotor 3 on one end side of a rotating shaft 31 described later.

  The air outlet 13 a is open around the axial center of the other end wall 13. A bearing holding portion 13 b is provided at the axial center portion of the other end wall portion 13. The bearing holding portion 13b is provided with a bearing 31b that rotatably supports a portion of the rotor 3 on the other end side of a rotating shaft 31 described later. The air outlet 13a is connected to a discharge duct 72 for discharging fine powder after pulverizing air and pulverized raw material (object to be pulverized) together with air.

  As shown in FIG. 2, the liner 2 is formed of an abrasion-resistant material in which concaves 2 a and convexes 2 b are alternately formed in the circumferential direction on the inner peripheral surface thereof. Each of the recesses 2a and 2b extends linearly in the axial direction on the inner peripheral surface of the liner 2, and is formed in a triangular sawtooth shape in a sectional view.

  The rotor 3 includes a rotating shaft 31 and a plurality (five in this embodiment) of rotor disks 32 that are detachably provided at a certain interval in the axial direction of the rotating shaft 31. These rotor disks 32 are disposed within the range of the liner 2 between the intermediate wall portion 11 and the other end wall portion 13.

  The crushing plates 4 are fixed at a constant interval in the circumferential direction of the outer peripheral portion of each rotor disk 32, so that a plurality of crushing plates 4 are provided at a constant interval in the axial direction and the circumferential direction of the rotor 3 as described above. It has a structure.

  As shown in FIGS. 2 and 3, the first frame-shaped member 5 protrudes from one end portion in the width direction that coincides with the axial direction of the rotor 3 on one plate surface 4 a of the pulverizing plate 4, and the other in the width direction. It is formed in a U shape so as to return to the end. Further, the second frame-like member 6 is formed in a U shape so as to protrude from one end portion in the width direction on the other plate surface 4b of the pulverizing plate 4 and to return to the other end portion in the width direction.

  The first frame-like member 5 and the second frame-like member 6 have a square cross section, and the U-shaped inner portions are the above-described openings 5a and 6a. . Further, the first frame-like member 5 and the second frame-like member 6 are in a state in which the surface facing the inner peripheral surface side of the liner 2 is close to the inner peripheral surface of the liner 2 together with the tip 4c of the grinding plate 4. ing. In this embodiment, the distance between the inner peripheral surface of the liner 2 (the tip of the convex 2b) and the tip 4c of the crushing plate 4, the inner peripheral surface of the liner 2 (the tip of the convex 2b) and the first frame-like member 5 are used. And the space | interval with the surface which faces the inner peripheral surface side of the liner 2 in the 2nd frame-shaped member 6 is set to 2-3 mm.

  The pulverization plate 4 is located on the inner side in the radial direction from the rotor 3 and fixed to the outer peripheral portion of the rotor disk 32 by welding or the like, and the pulverization plate 4 is attached to and detached from the base end side pulverization plate portion 41. The front-side crushing plate portion 42 is provided freely and has the first frame-like member 5 and the second frame-like member 6. The proximal-side pulverizing plate portion 41 and the distal-end-side pulverizing plate portion 42 are positioned by positioning pins (not shown) and then connected by screws (not shown) such as bolts and screws. It has become. Further, the first frame-like member 5 and the second frame-like member 6 are connected to the tip side crushing plate portion 42 by welding or the like.

  A disc-shaped partition plate 33 is provided between the pulverizing plates 4 in the axial direction of the rotor 3. The crushing plates 4 provided in each rotor disk 32 are shifted in the circumferential direction so that adjacent ones in the axial direction do not overlap with each other in the axial direction.

  Further, a raw material supply port 73a for supplying the pulverized raw material into the liner 2 is formed in the barrel 10 and the liner 2 of the stator housing 1 at a position on one end side in the axial direction of the liner 2. The raw material supply port 73 a is connected to the raw material supply duct 73.

  Further, a classification chamber 1 a is provided between the other end wall 13 in the stator housing 1 and a portion of the rotor 3 having the rotor disk 32. In the classification chamber 1a, a classification plate 34 is provided.

  As shown in FIGS. 1 and 4, the classifying plate 34 is coaxially fixed to the rotation shaft 31 in the vicinity of the inner surface of the other end wall portion 13 and is configured to rotate together with the rotation shaft 31. The classification plate 34 includes a disc portion 34a that is coaxially fixed to the rotating shaft 31, and a plurality of classification bars 34b that are provided on the disc portion 34a so as to extend radially from the outer edge portion thereof. It is configured.

  Each classification bar 34b is provided at a constant interval in the circumferential direction of the disc portion 34a, and has an equal length so that the tip thereof is positioned at a circle centered on the rotation center of the disc portion 34a. Is formed. Each classification bar 34 b extends to a position overlapping in the axial direction with respect to the air outlet 13 a formed around the axial center portion of the other end wall portion 13.

  That is, the classification plate 34 is configured to knock the coarsely pulverized material that has been transferred to the classification chamber 1a without being sufficiently pulverized with the classification bar 34b before flowing out from the air outlet 13a.

  Further, the rotor disk 32 and the partition plate 33 are provided with openings at positions that overlap with the classification bar 34b of the classification plate 34 in the axial direction, and the coarsely pulverized product knocked down by the classification bar 34b through these openings. Is configured to return the air to the air inlet 11a side.

  In this embodiment, as shown in FIG. 1, the rotor 3 is installed so as to extend in the vertical direction (vertical direction), and the coarsely pulverized product knocked down by the classification bar 34b is subjected to the action of gravity. Thus, the air naturally returns to the air inlet 11 a side via the return flow path 35.

  The rotary shaft 31 is rotationally driven at high speed via a pulley or the like provided at one end thereof, so that the pulverizing plate 4 or the like rotates at high speed along the inner peripheral surface of the liner 2. While moving, the classification plate 34 is driven to rotate at a high speed.

  In FIG. 2, R is the rotation direction of the rotor 3 (the turning direction of the grinding plate 4).

  According to the fine pulverizer configured as described above, the first frame-shaped member 5 and the second frame-shaped member 6 projecting forward and rearward in the rotational direction of the rotor 3 are provided at the tip of the pulverizing plate 4. Since the rotor 3 is rotated, the plurality of pulverizing plates 4, the first frame-like member 5, and the second frame-like member 6 are swung at high speed along the inner peripheral surface of the liner 2. Become. For this reason, in the front end position of the pulverization board 4, the 1st frame-shaped member 5, and the 2nd frame-shaped member 6, a side edge position, the back of a turning direction, etc. High-speed air eddy currents, high-pressure and high-frequency air vibrations, and the like can be generated.

  Thereby, a larger impact force, shear force, compression force, etc. can be applied to the pulverized raw material passing between the pulverization plate 4 and the liner 2 by more disturbed vortex flow, air vibration, or the like. Moreover, it is possible to remarkably increase the chance that the particles of the pulverized raw material are pulverized or ground by collision, and the pulverized raw material is used for the pulverizing plate 4, the liner 2, the first frame member 5, and the second. The opportunity of crushing and grinding by colliding with the frame-shaped member 6 can also be remarkably increased.

  In this case, since it is not necessary to increase the rotational speed of the rotor 3, conventional precision can be used as the rotor 3, the grinding plate 4, and the like. Therefore, the cost does not increase. And the quality of the fine powder after grind | pulverizing a grinding | pulverization raw material by the high temperature by the increase in the rotational speed of the rotor 3 does not fall.

  Moreover, since it is not necessary to narrow the space | interval of the liner 2 and the grinding | pulverization board 4, the quantity of heat_generation | fever increases by this, and the quantity of movement of a grinding | pulverization raw material reduces, and quality of fine powder and production efficiency fall. Nor.

  Further, it is not necessary to lengthen the pulverization time by limiting the supply amount of air or pulverized raw material, so that the production efficiency of fine powder does not decrease.

  Therefore, it is possible to pulverize the pulverized raw material more finely without causing an increase in cost due to high precision of each component such as the rotor 3, a decrease in quality of fine powder due to a high temperature and a decrease in production efficiency of fine powder, It can be pulverized to a more uniform particle size. Further, since it is not necessary to increase the accuracy of each part, the size of the fine pulverizer can be easily increased.

  In addition, since the recesses 2a and 2b are alternately formed in the circumferential direction on the inner peripheral surface of the liner 2, vortex flow due to high-speed air in a more disturbed state, high-pressure and high-frequency air vibration, and the like can be generated. . Therefore, it is possible to further obtain fine powder having a finer and more uniform particle diameter and to improve the production efficiency of the fine powder.

  Further, the first frame-like member 5 is formed so as to protrude from one end portion in the width direction on one plate surface 4a and return to the other end portion in the width direction, and the second frame-like member 6 is formed in the other side. The first frame member 5 and the second frame disposed over the entire width of the pulverizing plate 4 are formed so as to protrude from one end portion in the width direction of the plate surface 4b and return to the other end portion in the width direction. The stirrer action of air can be further strengthened by the shaped member 6. Therefore, fine powder with a finer and more uniform particle diameter can be obtained, and the production efficiency of the fine powder can be improved.

  Further, the pulverization plate 4 is provided on the base end side pulverization plate portion 41 located on the inner side in the radial direction from the rotor 3, and is detachably provided on the base end side pulverization plate portion 41. The first frame-shaped member 5 having a shape that can be efficiently pulverized according to the type of the pulverized raw material, since the front-side crushing plate portion 42 having the two frame-shaped members 6 is provided. The second frame-like member 6 and the tip side crushing plate portion 42 can be easily changed. The first frame-like member 5 and the second frame-like member 6 may be formed of a shape other than the U-shape or the cross-sectional square in order to improve the pulverization efficiency. The crushing plate portion 42 may also be configured in a shape other than the shape shown in FIG.

  In addition, since only the tip portion of the pulverizing plate 4 that easily wears out and only the first frame-like member 5 and the second frame-like member 6 can be replaced by attaching and detaching the tip-side pulverizing plate portion 42, the running cost is reduced. Can be achieved.

In the above-described embodiment, an example in which the triangular sawtooth-shaped recesses 2a and 2b are formed on the inner peripheral surface of the liner 2 has been described. It may be.
{Different forms for carrying out the invention}

  Next, a second embodiment and a third embodiment as different modes for carrying out the present invention will be described with reference to the drawings.

(Second Embodiment)

  First, a second embodiment will be described with reference to FIG. However, elements common to the constituent elements shown in the first embodiment are denoted by the same reference numerals, and description thereof is simplified.

  The second embodiment is different from the first embodiment in that the crushing plate 4 is not provided with the first frame-like member 5 and the second frame-like member 6, and the crushing plate 4 This is that the distance from the liner 2 changes stepwise in the axial direction. However, the pulverizing plate 4 is constituted by a proximal end side pulverizing plate portion 41 and a distal end side pulverizing plate portion 42.

  That is, each pulverization plate 4 is disposed on the other side in the axial direction of the body portion 10 from the air inlet 11a side where the distance between the pulverization plate 4 and the liner 2 is disposed on one side of the body portion 10 in the axial direction. It is installed on each rotor disk 32 of the rotor 3 so as to narrow in steps toward the air outlet 13a side.

  In this embodiment, the rotor disk 32 and the crushing plate 4 are installed in five stages, and the first crushing plate 4 and the liner 2 (the tip of the convex 2b on the inner peripheral surface) on the air inlet 11a side are provided. ) Is set to 6 mm, the interval is sequentially reduced by 1 mm, and the fifth step is set to 2 mm. However, the number of the crushing plates 4 and the like installed in the axial direction may be four stages or less or six stages or more, and the first stage interval may be less than 6 mm or more than 6 mm. In addition, the dimension that changes stepwise may be a dimension other than 1 mm, or may not be constant. The final stage spacing determines the final particle size of the fine powder, so if a finer powder with a smaller particle size is required, set the spacing to a dimension of, for example, less than 2 mm. Therefore, when there is a demand for fine powder having a large particle diameter, the dimension is set to, for example, more than 2 mm.

  According to the fine pulverizer configured as described above, the distance between the pulverizing plate 4 and the liner 2 is the axial direction of the barrel 10 from the air inflow port 11a disposed on one side of the barrel 10 in the axial direction. Therefore, the pulverized raw material supplied from the raw material supply duct 73 to the first stage side of the pulverizing plate 4 is the air flow. It rides on the flow of air supplied from the inlet 11a and moves upward between the pulverizing plate 4 and the liner 2, and the pulverization progresses as these intervals are successively narrowed.

  For this reason, even when a pulverized raw material having a large particle size is supplied, it can be pulverized efficiently, and the production amount of fine powder can be improved by improving the efficiency.

  Further, by reducing the distance between the final stage (the fifth stage in this embodiment) pulverization plate 4 and the liner 2 on the air outlet 13a side (for example, narrower to less than 2 mm), a finer and more uniform particle size is obtained. In addition, it is possible to prevent the coarsely pulverized product from flowing out to the classification chamber 1a as much as possible. Moreover. Even when the interval is narrowed, since the pulverization efficiency is increased as described above, an increase in the amount of generated heat can be suppressed, and a decrease in the production amount of fine powder can be prevented.

  Needless to say, it is not necessary to increase the rotational speed of the rotor 3 or to limit the supply amount of air and pulverized raw material in order to obtain finer powder having a finer and more uniform particle size.

  Therefore, it is possible to obtain finer and more uniform fine particles without increasing costs due to high precision of each component such as the rotor 3, lowering the quality of fines due to higher temperatures, and lowering the production efficiency of fines. Can do. In addition, since it is not necessary to increase the accuracy of each part, it is possible to easily cope with an increase in the size of the pulverizer.

  In the second embodiment, the example in which the first frame-like member 5 and the second frame-like member 6 shown in the first embodiment are deleted has been described. Also in the embodiment, the first frame-like member 5 and the second frame-like member 6 may be provided on the tip side crushing plate portion 42.

  In this case, the pulverizing plate 4, the first frame-shaped member 5, and the second frame-shaped member 6 are in a state of being stepwise adjacent to the inner peripheral surface of the liner 2, and at a high speed along the inner peripheral surface. Thus, fine powder having a finer and more uniform particle diameter can be obtained, and the production efficiency of the fine powder can be improved.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. However, the same reference numerals are given to the elements common to the constituent elements shown in the first embodiment, and the description will be simplified.

  The third embodiment is different from the first embodiment in that the connecting member 8 that connects the first frame-like member 5 and the second frame-like member 6 adjacent in the circumferential direction of the rotor 3 is provided. It is a point that has.

  That is, as shown in FIG. 6 and FIG. 7, the connecting member 8 is a cross-section connecting the respective edges in the width direction of the mutually opposing portions in the adjacent first frame-like member 5 and second frame-like member 6. It is composed of a rectangular bar. The rectangular cross section of the connecting member 8 is configured to have the same shape and area as the cross sections of the square cross-section rods that form the first frame member 5 and the second frame member 6. Yes. Moreover, the connection member 8, the 1st frame-shaped member 5, and the 2nd frame-shaped member 6 are connected by welding, for example.

  In this embodiment, the two front-end-side crushing plate portions 42 are integrally formed by connecting the two adjacent sets of the first frame-shaped member 5 and the second frame-shaped member 6 with the connecting member 8. In addition to the coupled structure, the integrally coupled one is installed in the circumferential direction of the rotor disk 32 via the proximal-side crushing plate portion 41.

  According to the pulverizer configured as described above, since the connecting member 8 that connects the first frame-like member 5 and the second frame-like member 6 adjacent in the circumferential direction of the rotor 3 is provided, The strength of the first frame-like member 5, the second frame-like member 6, and the pulverizing plate 4 can be improved.

  Further, by fixing the two distal end side pulverizing plate parts 42 at both ends of the three connected distal end side pulverizing plate parts 42 to the proximal end side pulverizing plate part 41 with positioning pins or screws, three distal end side pulverizing plate parts 42 are fixed at a time. Since the pulverizing plate portion 42 and the three sets of the first frame-shaped member 5 and the second frame-shaped member 6 can be attached and detached, the number of assembly steps can be reduced and the worn first frame-shaped member. 5. The operating rate can be improved by shortening the time required to replace the second frame member 6 and the like.

  In the third embodiment, two sets of adjacent first frame-like members 5 and 6 are connected to each other, but one set of adjacent first frames is connected. The member 5 and the second frame member 6 may be connected to each other, and the three or more adjacent first and second frame members 5 and 6 may be connected. May be. However, in order to improve the efficiency of attaching / detaching the tip side crushing plate portion 42 described above, it is preferable to connect two or more sets.

1 is a cross-sectional view of a fine pulverizer shown as a first embodiment of the present invention. It is principal part sectional drawing of the same pulverizer. It is a figure which shows the grinding | pulverization board in the same pulverizer, the 1st frame-shaped member, and the 2nd frame-shaped member, Comprising: (a) is a front view, (b) is a side view. It is a front view which shows the classification board of the same pulverizer. It is a half sectional view of a pulverizer shown as a second embodiment of the present invention. It is principal part sectional drawing of the fine pulverizer shown as 3rd Embodiment of this invention. It is a figure which shows the state which connected the 1st frame-shaped member and the 2nd frame-shaped member in the same pulverizer with the connection member, Comprising: It is sectional drawing which follows the VII-VII line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator housing 2 Liner 2a Concave 2b Convex 3 Rotor 4 Crushing plate 4a One plate surface 4b The other plate surface 4c Tip 5 First frame-like member 5a Opening 6a Opening 6 Second frame-like member 8 Connecting member 10 Body 11a Air inlet 13a Air outlet 31 Rotating shaft 32 Rotor disk 41 Base end side crushing plate part 42 Front end side crushing plate part R Rotation direction

Claims (7)

A stator housing having a cylindrical body,
A cylindrical liner fitted to the inner surface of the body of the stator housing;
A rotor disposed coaxially with the liner inside the liner;
A plurality of outer circumferential portions of the rotor are provided at intervals in the axial direction and the circumferential direction of the rotor, the plate surface is directed in the rotation direction by the rotor, and the radially outer tip from the rotor is the liner. A fine pulverizer provided with a pulverization plate close to the inner peripheral surface of
The front end portion of the crushing plate is provided with a first frame-like member that protrudes toward the front side of the plate in the rotational direction and has an opening directed toward the inner peripheral surface of the liner. And a second frame member that protrudes rearward and has an opening directed toward the inner peripheral surface of the liner is provided on the other plate surface facing rearward in the rotational direction. Machine. A stator housing having a cylindrical body,
A cylindrical liner fitted to the inner surface of the body of the stator housing;
A rotor disposed coaxially with the liner inside the liner;
A plurality of outer circumferential portions of the rotor are provided at intervals in the axial direction and the circumferential direction of the rotor, the plate surface is directed in the rotation direction by the rotor, and the radially outer tip from the rotor is the liner. A fine pulverizer provided with a pulverization plate close to the inner peripheral surface of
In the pulverization plate, the distance between the pulverization plate and the liner is from the air inlet side arranged in one of the axial directions of the barrel portion to the air outlet side arranged in the other axial direction of the barrel portion. A fine pulverizer characterized in that the fine pulverizer is installed on the rotor so as to narrow in a stepwise manner.   In the pulverization plate, the distance between the pulverization plate and the liner is from the air inlet side disposed on one side of the barrel portion in the axial direction to the air outlet side disposed on the other side of the barrel portion in the axial direction. 2. The fine pulverizer according to claim 1, wherein the pulverizer is installed on the rotor so as to be narrowed stepwise.   The fine pulverizer according to any one of claims 1 to 3, wherein irregularities are alternately formed in the circumferential direction on the inner peripheral surface of the liner. The first frame-like member is formed so as to protrude from one end portion in the width direction coinciding with the axial direction of the rotor on the one plate surface and return to the other end portion in the width direction,
The said 2nd frame-shaped member is formed so that it may protrude from the said one end part of the said width direction in the said other board surface, and may return to the other end part of the said width direction. 4. The fine pulverizer according to 4.   The pulverization plate is provided on a base end side pulverization plate portion located radially inside from the rotor, and is detachably provided on the base end side pulverization plate portion. The first frame-shaped member and the second frame 6. The fine pulverizer according to claim 1, further comprising a tip side pulverizing plate portion having a frame-shaped member.   The connecting member for connecting the first frame-shaped member and the second frame-shaped member adjacent to each other in the circumferential direction of the rotor is provided. The pulverizer described.

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