JP2015180507A - Mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mill which makes the particle size of a pulverization material finer and thereby improves the pulverization efficiency.SOLUTION: A wave shape frame 21 includes: a wave shape plate 21a having an arc shape; a screen 21b which is formed at a part of a lower part of the wave shape plate 21a and connected with both end parts of the wave form plate 21a; a cylindrical front frame 21c fixed to a front surface of the wave shape plate 21a; and a cylindrical rear frame 21d fixed to a rear surface of the wave shape plate 21a. The wave shape member 21a has a non-penetration structure where holes are not formed and particulate objects cannot pass. In the wave shape member 21a, a wave, in which trough parts and crest parts are alternately formed in a circumferential direction, is formed regularly. A revolving pulverization material is irregularly reflected by the wave shape member 21a.

Description

  The present invention relates to a mill for pulverizing powders, foods, chemicals, pharmaceuticals and the like, for example, wheat, buckwheat, soybeans, red beans, coffee beans, corn, dried noodles, rice crackers, noodle scraps and the like.

  Conventionally, in the mill crushing chamber 311 of Patent Documents 1 and 2, as shown in FIG. 8, the rotating tooth 322 fixed to the rotating disk 313 rotates with respect to the fixed tooth 323, thereby moving the rotating tooth from the center to the outside. However, the raw material G was crushed with a gap between the fixed teeth 322 and the rotating teeth 323, and the granular material passed through the smooth cylindrical screen 210 and was discharged to the outside.

JP 2005-66511 A JP 2005-66508 A

However, as shown in FIG. 8, the conventional ordinary simple cylindrical screen 321 has a certain degree of regularity because the pulverized raw material G rotates together with the rotating disk 313 provided with the rotating teeth 322. Therefore, the pulverizing ability is limited, and there is a limit to reducing the particle size of the pulverized raw material G.
Then, this invention makes it a subject to provide the mill which raises a grinding | pulverization capability and makes the particle size of a grinding | pulverization raw material smaller.

  In view of the above problems, the present invention provides a supply port for supplying powder raw material and air, a crushing chamber for receiving the powder raw material and air, a crushing tooth provided in the crushing chamber, and crushing with the crushing tooth A cylindrical corrugated frame having a screen provided with a plurality of crushing teeth, the crushing teeth being fixed to a rotating disk, and provided on the periphery of the crushing chamber. Is provided with a corrugated plate material that is impermeable in the circumferential direction, and the powder material is supplied from the center of the crushing chamber and crushed by the crushing teeth while moving to the outer periphery of the crushing chamber, When moving along the curved surface of the corrugated plate material, the mill is crushed by the corrugated plate material and discharged to the outside from the screen.

  It is preferable that the corrugated frame includes a non-permeable corrugated plate material on a cylindrical side surface. In this case, it is necessary to provide a screen in a part of the plate material and allow the pulverized raw material to pass through.

  It is preferable that the corrugated frame has a corrugated screen on a cylindrical side surface. In this case, all or part of the corrugated screen is corrugated. A flat screen may be provided in part.

  This mill can be applied both inline and non-inline. In the case of in-line, the raw material which is installed in the middle of an air transportation line facility of a mixture of powder and air and pulverized is transported by transportation air.

The structure of the crushing device is not limited as long as it can crush the granular material. For example, a raw material supply port, a pulverization chamber that communicates with the raw material supply port and receives and pulverizes the raw material, an open / close door that opens and closes the pulverization chamber, a fixed plate fixed inside the open / close door, and an inside of the pulverization chamber A rotating disk disposed and rotated by a rotating shaft, a plurality of first impact pieces fixed to the surface of the rotating disk, and a plurality of second impacts formed in the fixed plate and disposed in a gap between the first impact pieces. What provided the grinding | pulverization part comprised from a piece is preferable.

  According to the first aspect of the present invention, the pulverized raw material on which the corrugated frame swirls is irregularly reflected, whereby the particle size can be reduced and the pulverization effect is enhanced.

  According to the invention described in claim 2, since the irregular reflection of the pulverized raw material is ensured, the pulverization efficiency is further increased.

  According to the invention described in claim 3, since the screen can be passed while the pulverized raw material is diffusely reflected by the corrugated frame, the sieving efficiency is increased.

It is a perspective view in the state where the door of the mill of the embodiment of the present invention was closed. It is a perspective view which shows the external appearance of the state which the opening-and-closing door of the mill removed the wave formwork. It is explanatory drawing which shows the internal structure of the state which closed the opening / closing door of the crushing chamber. It is a perspective view of the corrugated frame. It is a perspective view of the modification of the said waveform frame. It is explanatory drawing which shows operation | movement of this invention embodiment. It is explanatory drawing which shows operation | movement of this invention embodiment modification. It is explanatory drawing which shows the structure and operation | movement of a prior art example.

  The in-line mill 1 according to the embodiment of the present invention has a function of pulverizing / disintegrating raw materials when the raw materials are put into a line. As shown in FIGS. 1 to 4, it is installed in the first stage of the granular material transport line, and is provided with a raw material inlet 2 at the top. For safety, a belt conveyor 3 is installed under the raw material input port 2, and the raw material input from the raw material input port 2 is conveyed by the belt conveyor 3 to the cutter unit 4 located below the belt conveyor 3, The raw material cut and crushed to a certain size by the cutter unit 4 is discharged to the hopper 5 and supplied to the screw feeder 6.

  An air intake device 7 also serving as a silencer is provided at the outlet of the screw feeder 6. A crushing chamber 11 is formed in a main body casing 10 having a supply port 8 and a discharge port 9 (see FIG. 3). An opening / closing door 12 used for opening / closing the grinding chamber 11 is connected to the main casing 10. The supply port 8 is formed in the central portion of the open / close door 12. The air intake device 7 prevents noise from the crushing chamber 11. The main body casing 10 has a rectangular shape and is formed with a smaller thickness than the height and width.

  In addition, the main body casing 10 includes a lock device 25 that opens and closes the opening / closing door 12, a hanging portion 26 for hooking and lifting the hook, and a hinge portion 27 for rotating the opening / closing door 12 (see FIG. 2).

  As shown in FIGS. 2 and 3, the crushing chamber 11 is provided with a rotating disk 13 parallel to the closed door 12, and a lid 15 is attached to a rotating shaft 14 at the center of the rotating disk 13. The rotating shaft 14 is disposed at the center in the height direction and the width direction of the main body casing 10, the distal end portion projects into the crushing chamber 11, and the proximal end portion is disposed rearward. A rotating disk 13 attached to the rotating shaft 14 is structured to rotate at a high speed by a drive motor 19 (see FIGS. 1 and 3) connected to the rotating shaft 14 by a belt 14a. The pulverized raw material cut by the section 4 is quantitatively supplied by the screw feeder 6 to the region 16 in the central portion of the pulverization chamber 11 as shown by the arrow A in FIG.

  The crushing chamber 11 in the line generates a suction air volume by a rotating disk 13 that is rotated at high speed by a drive motor 19 and functions in the same manner as a blower. To region 16. That is, the turntable 13 functions as a wind power amplifying device.

  The cutter part 4 cuts the raw material input from the raw material input port 2 to a certain size as shown by arrows B and C in FIG. For example, dry noodles, dry seaweed, bread, noodle scraps, solidified food powder lump, etc. are cut with a sharp blade to have a certain size. Depending on the type of the object to be crushed, such as a piece of soybean or rice cracker, the cutter unit 4 does not necessarily need to be cut, so the cutter unit 4 can be omitted.

  As shown in FIGS. 3 and 6, a plurality of impact pins 22 are fixed to the surface portion 13 a of the rotating disc 13, and the stationary platen 18 is fixed to the inside (grinding chamber side) side surface of the open / close door 12 of the crushing chamber 11. A plurality of comb-shaped impact pieces 23 formed so as to mesh with the impact pins 22 are arranged in an annular shape. The impact piece 23 is formed by concentrically fixing three annular teeth 23a to 23c. In this specific example, the ring-shaped teeth of the impact piece 23 are arranged in three rows, but an appropriate number of rows can be arranged depending on the application.

  When the space where the raw material is crushed by the impact pin 22 and the impact piece 23 is defined as the pulverization unit 17, in the configuration of this specific example in which the ring-shaped teeth of the impact piece 23 are arranged in three circumferential rows, the pulverization unit 17 has three ring-shaped teeth 23a. It is divided into four spaces by ˜23c. That is, the grinding part 17a from the region 16 to the annular tooth 23a, the grinding part 17b from the annular tooth 23a to the annular tooth 23b, the grinding part 17c from the annular tooth 23b to the annular tooth 23c, and the corrugated frame from the annular tooth 23c. These are four spaces of up to 21 grinding parts 17d.

  The raw material supplied from the region 16 is pulverized by the pulverization unit 17a, and moves to the pulverization unit 17b through the gap 20a of the annular teeth 23a by the centrifugal force in the pulverization chamber 11. Similarly, the raw material is pulverized also in the pulverizing part 17b, moved to the pulverizing part 17c through the gap 20b of the annular teeth 23b, further pulverized in the pulverizing part 17c, and pulverized through the gap 20c of the annular teeth 23c. The part 17d is reached.

  In this specific example, the gaps 20a to 20c are set to the same interval, but it is also preferable to adopt a configuration in which these intervals are changed, the gap 20a is made the largest, and the gaps 20b and 20c are gradually reduced. is there. At this time, when the raw material is pulverized to such a size that it passes through the gap 20a of the innermost ring-shaped tooth 23a, the raw material moves from the pulverizing portion 17a to the pulverizing portion 17b by the centrifugal force in the pulverizing chamber 11, and When the raw material is pulverized to a size enough to pass through the gap 20b of the third annular tooth 23b, the raw material moves from the pulverizing part 17b to the pulverizing part 17c, where it is pulverized to a size enough to pass through the gap 20c of the third annular tooth 23c. Then, the raw material reaches the crushing part 17d from the crushing part 17c.

  As shown in FIG. 4, the corrugated frame 21 includes a corrugated plate member 21 a having a substantially cylindrical shape with a part of a lower region cut out and positioned around the rotation shaft 14, and a lower portion of the corrugated plate member 21 a. A screen 21b formed in a partial region and connected to both ends of the corrugated plate 21a, an annular front frame 21c fixed to the front of the corrugated plate 21a, and an annular rear fixed to the rear surface of the corrugated plate a And a frame 21d. The main surfaces of the front frame 21c and the rear frame 21d are parallel. The screen 21b is bent in an arc shape and forms a substantially cylindrical shape together with the corrugated plate material 21a. The central axis of the arc is the central axis of the corrugated plate material 21a, the front frame 21c, and the rear frame 21d. And coaxial. The corrugated member 21a is preferably made of metal, but may be made of other materials such as ceramic and plastic. The corrugated member 21a has a non-transmissive structure in which no holes are formed and the granular material cannot pass through. The corrugated member 21a is formed by regularly forming waves in which valleys and peaks are alternately formed in the circumferential direction. Thereby, it is comprised so that the turning grinding | pulverization raw material P may be irregularly reflected. The screen 21b is provided with a sieve mesh through which a granular material having a set particle size or less permeates, or a punched metal sheet in which holes are formed in a metal sheet by punching. The wave of the corrugated member 21a may be irregularly formed.

  A corrugated frame 121 of a modification of the corrugated frame 21 shown in FIG. 5 has a substantially cylindrical and corrugated screen 121b, a front frame 121c fixed to the front surface of the screen 121b, and a screen 121b. An annular rear frame 121d fixed to the rear surface, and a connecting member 121e for connecting and fixing the front frame 121c and the rear frame 121c are provided. When the strength of the screen 121b is sufficient, the connecting member 121e may not be provided.

  The use of the mill 1 described above will be described. The mill 1 is used by closing the door 12 using a lock device 25. At this time, the corrugated frame 21 is set and the door 12 is closed. The open / close door 12 is used when the grinding chamber 11 is maintained. First, the material to be crushed is charged into the raw material inlet 2. Since the cutter unit 4 is provided here, a slightly larger lump material may be supplied to the crushing chamber 11. The raw material input from the raw material input port 2 is conveyed to the cutter unit 4 by the belt conveyor 3, crushed to a certain size by the cutter unit 4, and supplied to the region 16 through the hopper 5 and the screw feeder 6. Hereinafter, the raw material supplied to the region 16 is referred to as a pulverized raw material P.

  As shown in FIG. 6, the pulverized raw material P supplied to the region 16 is diffused into the pulverization unit 17 together with the air flow, and is finely crushed by the impact from the impact pin 22 and the impact piece 23, and is the outermost ring shape. After passing through the gaps 20c of the teeth 23c, passing through the screen 21b of the corrugated frame 21 attached to the outer peripheral surface of the grinding chamber 11, the particles are sized to a desired particle size, and as shown by arrow E in FIG. Product) is discharged from the discharge port 9.

  In the mill 1 of the present embodiment, by using the corrugated frame, it is possible to obtain a finer particle size even when the screen opening is the same as in the case of using a conventional smooth cylindrical screen. Can do. That is, the physical properties of the pulverized product can be improved and the pulverization efficiency can be increased.

  As shown in FIG. 6, this effect is obtained by making the corrugated plate 21 a of the corrugated frame 21 corrugated so that the pulverized raw material G does not co-rotate with the impact pin 322 and the flow of the pulverized raw material P is waved. This is thought to be due to the occurrence of a unique phenomenon of irregularity caused by the template 21a. The detailed mechanism of the process by which this unique phenomenon contributes to the above effect is not clear, but the inventor presumes as follows. That is, in the case where a smooth cylindrical screen is used, the pulverization chamber is pulverized in a substantially regular flow (see the pulverized raw material G in FIG. 8). Since the turbulent flow is generated by the template material 21a and the moving direction of the pulverized raw material P becomes random, the pulverized raw material P is pulverized when it collides with the corrugated frame 21, and the pulverized raw materials P collide with each other to be pulverized. Furthermore, the pulverized raw material P collides with the impact pin 22 or the impact piece 23c. Thereby, the particle size of the grinding | pulverization raw material P becomes finer than the case of a smooth cylindrical screen, and powdering is accelerated | stimulated further. In addition, the screen 21b can change the opening as appropriate to obtain a granular material having a desired particle size. For example, if the opening is made finer, a finely pulverized product can be obtained. The mill 1 of the present embodiment is capable of obtaining a pulverized product with a finer particle size even when the screen has the same mesh size as compared with the case of using a smooth cylindrical screen. Further, since the corrugated plate material 21a is not formed with a hole and is a sheet material through which the pulverized raw material P does not pass, irregular reflection of the pulverized raw material is ensured, and the pulverization efficiency is further increased.

  According to the corrugated frame 121 which is a modified example of the corrugated frame 21, the ground material can be passed through the screen 121b while being irregularly reflected by the corrugated screen 121b. Rise. The crushing process of the corrugated frame 121 shown in FIG. 5 and the corrugated frame 21 shown in FIG. 4 is substantially the same operation, but the difference is that the corrugated frame 21 has a lower part of the corrugated frame 21. Compared with the case where the pulverized raw material P passes only from a certain screen 21b (see FIG. 6), in the corrugated frame 121, the screen 121b may diffusely reflect the pulverized raw material P or may pass the pulverized raw material. Yes (see FIG. 7). Since the screen 121b has a wave shape, the screen 121b is inclined with respect to the turning direction of the pulverized raw material. The pulverized raw material P is randomly reflected by the location where the screen 121b hits. On the other hand, an area where the pulverized raw material P easily passes and an area where the pulverized raw material P hardly passes are formed. The screen 121b is provided with corrugated peaks and valleys on the entire circumference, but a screen having a partially flat surface, for example, a member similar to the screen 21b of FIG. 4 may be provided.

  As described above, if the gaps 20a to 20c of the ring-shaped teeth 23a to 23c are set to a large interval on the inner side and gradually decreased toward the outer side, a steady and efficient pulverization can be achieved through the stepwise pulverization. Can be planned.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea of the present invention. Etc. are also included in the technical scope of the present invention. For example, the frequency and arrangement of waves of the wave form frame 21a and the like can be changed as appropriate.

  The mill of the present invention is used for milling and pulverizing grains such as wheat flour and oat flour.

DESCRIPTION OF SYMBOLS 1 ... Mill 2 ... Raw material inlet 3 ... Belt conveyor 4 ... Cutter part 5 ... Hopper 6 ... Screw feeder 7 ... Air intake device 8 ... Supply port 9 ... Exhaust port 10 ... Main body casing 11 ... Crushing chamber 12 ... Open / close door 13 ... Rotary disc 13a ... Surface 14 ... Rotating shaft ... Belt 14a
DESCRIPTION OF SYMBOLS 15 ... Lid 16 ... Area | region 17 ... Grinding part 18 ... Fixed disk 19 ... Drive motor 22 ... Impact pin 23 ... Impact piece 23a-23c ... Ring-shaped tooth 20a- 20c ... Gap 21 ... Corrugated frame 25 ... Locking device 26 ... Suspension upper part 27 ... Hinge part 21a ... Corrugated plate material 21b ... Screen 21c ... Front frame 21d ..Rear frame 121 ... Wavy frame 121b ... Screen 121c ... Front frame 121d ... Rear frame 121e ... Connecting member P ... Grinding raw material

Claims (1)

A supply port for supplying powder raw material and air, a crushing chamber for receiving the powder raw material and air, a crushing tooth provided in the crushing chamber, and a screen for sieving the powder crushed by the crushing tooth And in a mill having
The crushing teeth comprise a plurality of crushing teeth fixed to a rotating disk,
A cylindrical corrugated frame provided at the periphery of the crushing chamber and having a screen comprises a corrugated plate material that is impermeable in the circumferential direction,
When the granular material is supplied from the center of the crushing chamber and is crushed by the crushing teeth while moving to the outer periphery of the crushing chamber, and moves along the curved surface of the corrugated plate, A mill characterized in that it is pulverized with a corrugated plate and discharged from the screen to the outside.

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