JP2001232167A - Agitating and mixing device for powder and granular material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agitating and mixing device for powder and granular materials which sufficiently agitates and mixes the powder and granular materials and an additive in a mill by making the agitating movement distance of these materials longer. SOLUTION: When the mill 11 is rotated forward by a revolving motor 12 after a cullet and a foaming agent are fed into the mill 11, the cullet and the foaming agent are agitated and mixed by many agitating vanes 37. At this time, the respective agitating vanes 37 are disposed at the designed angle of inclination and therefore the cullet and the foaming agent are mixed under convection between the upstream section and downstream section of the mill while being guided by the agitating vanes 37. Consequently, the agitation movement distance of the raw materials in the mill 11 is made longer and the agitating and mixing may be sufficiently executed. The mixture after the agitation is thereafter discharged from a mixture discharge section 13 in the downstream part of the mill while the mixture is guided with the respective agitating vanes 37 by inverting the mill 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for agitating and mixing powders and granules, and more particularly to an apparatus for agitating and mixing powders and granules for uniformly applying an additive to glass powder or the like.

[0002]

2. Description of the Related Art As a method of recycling glass plates and glass bottles, these glass products are ground with a hammer or the like, and a foaming agent (additive) is mixed into the obtained glass powder cullet (granules). By foaming in a heating furnace, a coarse aggregate made of glass having a diameter of 5 mm or less is produced and used as a road pavement material. Therefore, conventionally, as a general stirring and mixing device for a cullet and a foaming agent, for example, a hollow-shaped mill rotated around an axis by a rotary motor (driving unit) is provided, and a raw material charging unit is provided upstream of the mill. Is provided, while a discharge part for the mixture is provided downstream of the mill. During the operation of this mill, after the raw materials are charged from the charging section, the mill is rotated by the rotary motor, so that the cullet and the blowing agent are gradually moved to the downstream side of the mill while being stirred, and finally, It is discharged from the discharge section.

[0003]

However, in the conventional stirring and mixing apparatus, as described above, the cullet and the foaming agent are gradually moved to the downstream side of the mill while being stirred and mixed. That is, the raw materials to be stirred move linearly in the mill toward the discharge section. Therefore, there is a problem that the distance of stirring and moving of the raw materials in the mill becomes short, and the cullet and the blowing agent cannot be sufficiently stirred.

In addition, each measurement of cullet and foaming agent is
Before being put into the mill, it was previously performed using a weighing device. Thus, a stage dedicated to measurement is required separately from the stirring stage provided with the stirring and mixing device. In addition, in order to transport the raw materials from the measuring stage to the charging section of the stirring and mixing device, generally, a transporting means such as a transport vehicle or a transport conveyor is used. For this reason, the raw materials scatter from the conveying means to the outside due to an impact during conveyance, or collectively adhere to the conveying means, so that a cullet or a foaming agent weighing as measured cannot be put into the mill. There was a point.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an apparatus for stirring and mixing powder and granules capable of sufficiently stirring and mixing the powder and the additives in a mill by increasing the distance for stirring and moving them. Its purpose is to do. In addition, the present invention
It is an object of the present invention to provide a stirring and mixing apparatus for powder and granules capable of smoothly cutting out an additive from an additive input section. Further, according to the present invention, the granular material and the additive can be measured in the stirring stage, so that the installation space of the stirring and mixing device can be reduced, and the granular material and the additive can be accurately mixed. It is an object of the present invention to provide an apparatus for stirring and mixing powdery and granular materials which can stir.

[0006]

According to the first aspect of the present invention, the powder and granules and their additives are charged into the mill from a raw material charging section formed upstream of the mill, and the driving section drives the powder and granules. In a powder and granule stirring and mixing apparatus for stirring and mixing the granules and the additives by rotating a mill and discharging the obtained mixture to the outside from a mixture discharge portion formed on the downstream side of the mill, In the inner peripheral surface of the mill, during the normal rotation of the mill, the granules and the additive can be stirred and mixed while being convected between the upstream and downstream portions of the mill. This is an apparatus for agitating and mixing a granular material, which is provided with a plurality of agitating blades, each of which is arranged at an angle capable of discharging the mixture after being stirred from the apparatus.

[0007] The shape, material and size of the mill are not limited. For example, the shape may be ridge-shaped or barrel-shaped,
It may have a polygonal cross section. The type, size, etc. of the powdery granules used as raw materials are not limited. For example, glass is exemplified. Specific examples include various types of glass plates such as window glass and various types of glass containers such as beer bottles and cups that are finely ground. In this case, a glass having normal hardness or a hard glass having high strength may be used. The particle size of the crushed glass powder is not limited. For example, several μm to several hundred μm
It can be. The type of the additive is not limited. For example, a foaming agent that foams cullet, which is glass powder, may be used.

[0008] The powder and granule charging section into which the powder and granules are charged may be separate from the additive charging section into which the additive is charged, or may be shared by one charging section. The type of the driving unit for rotating the mill is not limited. For example, it may be an electric motor or various actuators such as a hydraulic motor. Further, the rotation mechanism of the mill is not limited. For example,
The output shaft of the drive unit may be directly connected and rotated, or may be rotated indirectly via a power transmission system such as a chain, a belt, or a gear. The mixing ratio of the powder and the additive is not limited. For example, when the powder is the cullet and the additive is a foaming agent, the ratio is about 60: 1. The number of stirring blades protruding from the inner peripheral surface of the mill is not limited. Further, the inclination angle of each stirring blade is not limited. In short, it is possible to stir and mix the granules and additives during the normal rotation of the mill while convectively flowing between the mill upstream and the mill downstream, and at the time of mill inversion, from the mixture discharge section provided at the downstream of the mill. Any angle may be used as long as the mixture after stirring can be discharged.

According to a second aspect of the present invention, in the charging section, an additive charging hopper for storing the additive and a downstream portion of the additive charging hopper are provided directly, and the additive is continuously provided. The powder according to claim 1, wherein an additive feeder having a screw conveyor for cutting the mixture and an additive-side measuring means provided downstream of the screw conveyor and measuring the weight of the cut additive is connected. This is a stirring and mixing device for granules. The type of the additive-side measuring means is not limited. For example, a load cell having a strain gauge for converting a strain into an electric resistance may be used.

According to a third aspect of the present invention, the mill is rotatably mounted on a gantry, and the gantry is provided with a powder-particle-side weighing means for measuring the weight of the gantry including the weight of the mill. 2. The method according to claim 1, wherein the weight of the granular material charged into the mill is indirectly calculated based on the measured value of the granular material-side measuring means.
Alternatively, it is a device for stirring and mixing the powder and granules according to claim 2.
The type of the powder-side measuring means is not limited. For example, a load cell may be used.

[0011]

According to the present invention, after a predetermined amount of powder and granules are put into a mill, and the mill is rotated forward by a drive unit, the powder and granules are added to the mill by a plurality of stirring blades. Stir and mix. At this time, since each stirring blade is arranged at an inclination angle as designed in advance, the powder and the particles are convected between the mill upstream and the mill downstream while being guided by each stirring blade. Stir and mix. As a result, the moving distance of the stirring of the raw materials and the like in the mill becomes long, and sufficient stirring and mixing can be performed. After the mixing, the mill is inverted so that the stirred mixture is discharged from the mixture discharge portion opened downstream of the mill while being guided by the stirring blades.

In particular, according to the second aspect of the present invention, the additives in the additive input hopper are continuously cut out by the screw conveyor to the additive-side measuring means. At this time, since the screw conveyor is directly attached to the additive charging hopper, even if the additive is a fine powder, it is difficult to clog in the tapered downstream portion of the additive charging hopper. Thereafter, a predetermined amount of the additive measured by the additive-side measuring means is put into a mill and mixed with the powder and granules. As described above, since the additive-side metering means is provided in the additive-introducing section, the weight of the additive can be measured immediately before the additive is introduced into the mill in the stirring stage provided with the mill. As a result, the installation space of the entire stirring and mixing apparatus can be reduced, and since it is not necessary to transport the additive after the measurement from the measurement stage to the stirring stage, for example, by a transport conveyor or the like, accurate weight of the additive can be obtained. Additives can be charged to the mill.

According to the third aspect of the present invention, the weight of the gantry including the weight of the empty mill is previously measured by the granule-side measuring means, and the measured value at this time is set to the reference weight (reference value). ). Thereafter, similarly, the weight when the granular material is put into the mill is weighed, and this is set as an actually measured value. Therefore, by subtracting the reference value from the actually measured value, the weight of the granular material charged into the mill is indirectly calculated. As described above, the weight of the charged granules is measured by the granule-side measuring means in the stirring stage in which the mill is arranged indirectly, so that the installation space of the entire stirring and mixing device can be reduced. On the other hand, there is no need to transport the weighed granules by a conveyor or the like from the weighing stage to the stirring stage as in the conventional case, and the granules and the additive are stirred and mixed at a more accurate mixing ratio. be able to.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for stirring and mixing powders according to an embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 1 is a front view of an apparatus for stirring and mixing powders according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a mill constituting a part of the apparatus for agitating and mixing powder and granular materials according to one embodiment of the present invention. FIG. 3 is a partial cross-sectional view of a mill constituting a part of the apparatus for agitating and mixing a granular material according to one embodiment of the present invention. FIG. 4 is an enlarged vertical cross-sectional view of an additive charging section which constitutes a part of the apparatus for agitating and mixing a granular material according to one embodiment of the present invention.
FIG. 5 is an enlarged plan view of an additive introduction section which forms a part of the apparatus for agitating and mixing a granular material according to one embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes an agitating / mixing device for powdery and granular materials (hereinafter sometimes referred to as an agitating / mixing device). (A granular material) and a foaming agent (additive) for foaming the cullet into the mill 11 from a tubular charging section 11a for the motor, and then a rotary motor (drive section) 1
By rotating the mill 11 by 2, the cullet and the foaming agent are stirred and mixed, and the produced mixture is discharged to the outside from the mixture discharge part 13 connected to the downstream end of the mill 11. Hereinafter, each component will be described in detail. The mill 11 is a stirring drum whose both ends in the axial direction are tapered, and the mixture discharge portion 13 side is inclined downward by 20 to 30 degrees through a pair of bearings 15A and 15B, and is placed on the gantry 14. It is pivoted. The rotary motor 12 is attached to the base of the bearing 15A. The torque of the rotary motor 12 is transmitted to the mill 11 via a chain type power transmission system (not shown) housed in the casing 16.
At the lower end of the gantry 14, a first load cell (powder / grain side measuring means) 17 is provided. The first load cell 17 indirectly measures the weight of the cullet put into the mill 11 by measuring the weight of the gantry 14 including the mill 11.

An additive charging section 18 for charging the foaming agent into the mill 11 is connected to the middle of the charging section 11a.
The additive charging section 18 includes an additive charging hopper 19 that stores a blowing agent, a screw conveyor 20 that is provided directly downstream of the additive charging hopper 19, and continuously cuts the blowing agent. A second load cell (additive-side measuring means) 21 is provided downstream of the screw conveyor 20 and measures the cut-out blowing agent as a strain amount of a strain gauge. In FIG. 1, reference numeral 22 denotes a mounting table of the mill 11 mounted on the gantry 14, and 23 denotes a gantry 1
A gate-shaped work floor installed on the floor separately from 4,
Reference numeral 24 denotes a handrail attached to the work floor 23. Hereinafter, referring to FIG. 4 and FIG.
Will be described in detail.

As shown in FIGS. 4 and 5, the additive charging hopper 19 is a rectangular hopper having a bottom surface curved downward in a semicircular shape and having a rectangular shape in plan view. A lid 19b, which can be opened and closed via a hinge 19a, is provided in an upper opening of the additive hopper 19. The additive input hopper 19 is designed to be gradually narrower downward, and a pair of bearings 25 is provided between both end plates at the bottom of the hopper.
The rotation shaft 26 is horizontally mounted via A and 25B. A portion of the rotary shaft 26 housed in the hopper 19 is provided with a plurality of stirring rods 29 protruding from the outer peripheral surface of the rotary shaft 26, and the spiral blades 27, which are twisted in opposite directions, are provided. 28 are fixed. In addition, each stirring rod 29 is
The stirring rods 29 adjacent to each other are fixed to the rotating shaft 26 at a constant pitch in the axial direction of the rotating shaft 26 and at an angle shift of every 90 degrees. One end of the rotating shaft 26 protrudes outward from the hopper 19, and the stirring motor 30 is connected to this protruding portion. Thus, after the foaming agent is charged into the hopper 19, when the rotating shaft 26 is rotated by the stirring motor 30, the spiral blades 27 and 28 rotate in opposite directions, whereby the foaming agent accumulated at the bottom of the hopper is removed by the hopper length. It is gradually gathered to the middle part of the direction. A discharge hole 19c connected to a supply port of the screw conveyor 20 is formed in an intermediate portion at the bottom of the hopper.

The screw conveyor 20 has a cylindrical casing 31 extending in the width direction of the additive input hopper 19. The cylindrical casing 31 is directly fixed to a portion on the back side of the discharge hole 19c of the additive input hopper 19 via a supply port of the foaming agent. Further, inside the cylindrical casing 31, a screw 32 having a spiral blade provided on the outer peripheral surface of the rotating shaft is rotatably housed. Screw 3
The base of the rotation shaft 2 projects outside the cylindrical casing 31, and this projection is connected to the cutout motor 33. Therefore, the blowing agent flowing into the cylindrical casing 31 from the supply port is gradually conveyed to the downstream side of the conveyor by the rotation of the screw 32 by the cut-out motor 33, and then from the discharge port 31 a formed in the downstream portion of the cylindrical casing 31. , The supply port 2 of the second load cell 21
It is discharged into 1a.

Inside the second load cell 21, a short gutter-shaped pan 35 that can be inverted around a rotation shaft 35a by an inversion motor 34 is housed. Therefore,
When the amount of the foaming agent dropped on the tray 35 reaches a certain amount, the second load cell 21 rotates the tray 3 by the reversing motor 34.
5 is inverted and the blowing agent is discharged from the discharge port 21b. Thereafter, the foaming agent discharged from the discharge port 21b is supplied to the mill 11 through the branch pipe 36 communicating with the middle of the charging section 11a.
Flows into. In FIG. 4 and FIG. 5, reference numeral 19d denotes a column of the additive input hopper 19.

Next, referring to FIG. 2 and FIG.
A number of the stirring blades 37 that are arranged obliquely on the inner peripheral surface of No. 1 will be described in detail. Each of the stirring blades 37 is located on the inner peripheral surface of the mill 11, and can be stirred and mixed while convection between the cullet and the foaming agent is performed between the upstream and downstream portions of the mill during normal rotation of the mill. Sometimes, the mixture after the completion of stirring is inclined and disposed at an angle at which the mixture after the stirring can be discharged from the mixture discharge section 13 provided at the downstream of the mill.

That is, the stirring blades 37 are arranged in 12 rows every 30 degrees in the inner circumferential direction of the mill 11. The number of the stirring blades 37 constituting each row is 10 in total,
Each of the stirring blades 37 is inclined at an inclination angle of about 35 degrees so as to gradually expand toward the downstream side. Moreover, the adjacent stirring blades 37 are located on the axis of the mill 11 at the downstream end of the stirring blade 37 arranged at the upstream side and at the upstream end of the stirring blade 37 arranged at the downstream side. Are overlapping. Also, the inlet 11 at the upstream end of the mill 11
The mixture discharge part 13 is connected to the discharge port 11c at the downstream end of the mill 11 while the lower part of the input part 11a is inserted into b. In the mill 11 from the discharge port 11c, a discharge screw conveyor 38 for smoothly discharging the stirred mixture to the outside of the mill when discharging the mixture is accommodated. Therefore, at the time of discharging the mixture, the discharge motor 39 rotates the discharge screw conveyor 38 at the same time as the mill 11 is inverted, so that the mixture can be smoothly discharged to the discharge port 11.
discharged from c.

Next, the operation of the apparatus 10 for agitating and mixing a granular material according to one embodiment of the present invention will be described. As shown in FIG. 1, at the time of raw material stirring and mixing, cullet is gradually charged into the mill from the charging section 11a, and at the same time, 5 kg of a blowing agent is charged into the mill from the additive charging section 18. That is, the foaming agent is gathered by the agitating motor 30 by spiral blades 27 and 28 rotating in opposite directions to the discharge hole 19c at the center of the bottom of the hopper, and thereafter, the screw conveyor 20 fixed to the back surface of the center of the hopper bottom. By the second
Are continuously cut out on the receiving pan 35 of the load cell 21 of FIG. The foaming agent stored only 5 kg on the pan 35 is
When the tray 35 is inverted by the inversion motor 34, the tray 35 is dropped from the branch pipe 36 into the mill 11 through the charging section 11 a. As described above, since the screw conveyor 20 is directly attached to the additive-feeding hopper 19, even if the foaming agent is a fine powder, it is hardly clogged at the tapered bottom of the additive-feeding hopper 19.

As described above, since the second load cell 21 is provided in the additive charging section 18, the weight of the foaming agent can be measured immediately before the foaming agent is charged into the mill 11 on the stirring stage provided with the mill 11. it can. As a result, the entire installation space of the stirring and mixing device 10 can be reduced, and since there is no need to transport the measured foaming agent from the measuring stage to the stirring stage, for example, by a transport conveyor, as in the related art, accurate weighting is achieved. The foaming agent can be put into the mill 11.

The mixing ratio between the cullet and the foaming agent is 60: 1. Therefore, the input amount of cullet becomes 300 kg. In this method of measuring the amount of cullet charged, the weight of the gantry 14 including the weight of the empty mill 11 is measured in advance by the first load cell 17, and the measured value at this time is referred to as a reference weight (reference value). I do. Thereafter, the weight when the cullet and the foaming agent are charged into the mill 11 is measured in the same manner, and this is set as an actually measured value. Therefore, the value obtained by subtracting the reference value from the actually measured value is 305 kg (cullet 30
(0 kg + foaming agent 5 kg), the charging of 300 kg is terminated by interrupting the charging of the cullet. Thus, the weight of the cullet put into the mill 11 is calculated indirectly.

As described above, the weight of the cullet inserted is weighed by the first load cell 17 in the stirring stage in which the mill 11 is arranged indirectly.
While it is possible to reduce the entire installation space of the stirring and mixing device 10, it is not necessary to transport the cullet after the measurement by a transport conveyor or the like from the measuring stage to the stirring stage as in the related art, and to achieve a more accurate mixing ratio, The cullet and the blowing agent can be stirred and mixed.

Next, the mill 11 is rotated forward by the rotary motor 12, and the cullet and the foaming agent are stirred and mixed. That is, when the mill 11 is rotated forward, the cullet and the blowing agent are stirred and mixed by the many stirring blades 37. At this time, since the stirring blades 37 are arranged at an inclination angle as designed in advance, the cullet and the foaming agent are
The mixture is stirred and mixed while causing convection between the upstream part of the mill and the downstream part of the mill. As a result, the distance for stirring and moving the cullet and the like in the mill 11 becomes long, and sufficient stirring and mixing can be performed. After that, after sufficient mixing is performed, the rotation of the rotation motor 12 is reversed so that the mill 11 rotates in the opposite direction, and at the same time, the discharge screw conveyor 38 is rotated by the discharge motor 39, whereby the mixture after stirring is mixed. From the mixture discharge section 13 to the outside of the mill.

[0027]

According to the present invention, since a large number of stirring blades are arranged on the inner peripheral surface of the mill at a pre-designed inclination angle, the raw material can be rotated only by rotating the mill forward during stirring and mixing. And the additive can be agitated and mixed while being convected between the mill upstream and the mill downstream. Thereby, the distance for stirring and moving the raw materials and the like in the mill becomes long, and sufficient stirring and mixing can be performed.

In particular, according to the second aspect of the present invention, the screw conveyor is provided directly downstream of the additive charging hopper, so that the clogging of the additive in the additive charging hopper is reduced. Can be. In addition, since the additive-side metering means is provided in the additive charging section, the additive can be measured in the stirring stage, whereby the installation space of the stirring and mixing device can be reduced, and the accurate mixing amount can be reduced. Can stir the powder and the additive with the additive.

According to the third aspect of the present invention, since the powder and granules charged into the mill are indirectly measured by the powder and granule-side measuring means provided on the gantry, the powder in the stirring stage can be measured. The granules can be weighed and the installation space of the whole stirring and mixing device can be reduced, while the powder and granules and the additive can be stirred and mixed at a more accurate mixing ratio.

[Brief description of the drawings]

FIG. 1 is a front view of an apparatus for agitating and mixing a granular material according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a mill constituting a part of the apparatus for stirring and mixing powder and granular materials according to one embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of a mill constituting a part of the apparatus for agitating and mixing a granular material according to one embodiment of the present invention.

FIG. 4 is an enlarged vertical cross-sectional view of an additive charging section that forms a part of the apparatus for agitating and mixing a granular material according to one embodiment of the present invention.

FIG. 5 is an enlarged plan view of an additive input section which forms a part of the apparatus for agitating and mixing a granular material according to one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Stirring / mixing device for powder and granules, 11 mill, 11a charging unit, 12 rotary motor (drive unit), 13 mixture discharging unit, 14 gantry, 17 first load cell (powder / particle measuring means), 18 additive charging unit , 19 additive hopper, 20 screw conveyor, 21 second load cell (additive side measuring means), 37 stirring blade.

Claims (3)

[Claims] 1. A granule and its additive are charged into a mill from a raw material charging section formed on the upstream side of the mill, and the mill is rotated by a driving unit to thereby form the powder and the additive. And agitating and mixing the mixture, and discharging the resulting mixture to the outside from a mixture discharge section formed on the downstream side of the mill. It is possible to stir and mix the body and additives while convection between the mill upstream and the mill downstream, and at the time of mill inversion, the mixture after stirring is tilted to an angle at which the mixture after stirring can be discharged from the mixture discharge section downstream of the mill. An agitating and mixing device for a granular material in which a number of arranged agitating blades are protruded. 2. An additive charging hopper for storing an additive, a screw conveyor directly provided downstream of the additive charging hopper for continuously cutting out the additive, and 2. The apparatus according to claim 1, further comprising an additive input section provided downstream of the screw conveyor and having an additive-side measuring means for measuring the weight of the cut additive. 3. The mill is rotatably mounted on a pedestal, and the pedestal is provided with a powder-particle-side measuring means for measuring the weight of the pedestal including the weight of the mill. The apparatus according to claim 1 or 2, wherein the weight of the granular material charged into the mill is indirectly calculated based on the measured value.