JP3182618U - Horizontal dry crusher - Google Patents

Abstract

A horizontal dry pulverizer capable of freely controlling the residence time of raw materials in a pulverizing chamber and increasing the range of particle size control of a product.
A cylindrical pulverization tank 14 having a horizontal pulverization chamber, provided at one end of the pulverization tank, and a raw material input unit 22 for continuously supplying raw materials into the pulverization tank in a fixed amount, is provided in the pulverization chamber. The pulverized media M, which is provided in the pulverizing chamber, is horizontally disposed and driven by a rotary drive shaft driven by an electric motor, and a stirring member for stirring the mixture of the raw materials and the pulverized media to pulverize the raw materials. 28, a media separation unit 18 provided at the other end of the pulverization tank, and a product discharge unit 100 for discharging the pulverized product. Corresponding to the load of the electric motor, the opening / closing mechanism 104 is controlled to open / close, thereby controlling the residence time of the raw material in the pulverization tank while maintaining the operation of the stirring member.
[Selection] Figure 1

Description

  The present invention relates to a horizontal dry pulverizer. The horizontal dry pulverizer of the present invention includes alumina, silicon nitride, zirconia, aluminum nitride, PZT, titanium titanate, other ceramics, ferrite, silica, glass, carbon, inorganic pigments, organic pigments, other dry pulverized products, etc. Although it is particularly suitable for use to pulverize raw materials into fine particles, it is not limited thereto.

  As a conventional horizontal dry pulverizer, one described in Japanese Utility Model Publication No. 7-8034 is known. The horizontal dry pulverizer described in this publication has a raw material charging nozzle at one end, a discharge portion for the pulverized raw material at the other end, and a cylindrical shape in which a separator is disposed in the vicinity of the discharge portion. A crushing chamber, a screw that is a thrust generating member disposed on the one end side of the crushing chamber, and a plurality of arms that are rotatably provided in the crushing chamber and are planted around a rotating shaft as stirring elements A stirring member and a grinding media filled in the grinding chamber are provided. In such a horizontal dry pulverizer, the raw material charged into the pulverizing chamber from the raw material charging nozzle is given a thrust toward the discharge portion by the screw, stirred together with the pulverizing medium, and pulverized by mutual friction, shearing, etc. Thereafter, it is separated from the pulverized media by the separator and discharged from the discharge portion.

Such a horizontal dry pulverizer is usually of a continuous operation type, but it becomes blocked and operation is impossible, the fluidity is too good and the pulverization is insufficient, or the pulverized product whose fluidity is the raw material. It is very difficult to control, depending on the nature.
No. 07-8034

  Accordingly, an object of the present invention is to provide a horizontal dry pulverizer capable of controlling the residence time of the raw material in the pulverizing chamber and pulverizing the raw material into a desired state.

The above object is achieved by a horizontal dry pulverizer having the following constitutions (1) to (5) of the present invention.
(1) A cylindrical pulverization tank having a horizontal pulverization chamber, provided at one end of the pulverization tank, and placed in the pulverization chamber, a raw material input unit for continuously supplying raw materials into the pulverization tank in a fixed amount Crushing media, a stirring member provided in the crushing chamber, arranged horizontally, driven by a rotary drive shaft driven by an electric motor, and stirring the mixture of the raw materials and the grinding media to crush the raw materials, the crushing tank In a horizontal dry pulverizer equipped with a media separation unit provided at the other end of the product, a product discharge unit for discharging the crushed product,
An opening / closing mechanism provided in the product discharge unit for controlling discharge of the product by opening and closing, a load detection means for detecting a load of the electric motor, and a load of the electric motor detected by the load detection means. A horizontal dry pulverizer characterized by comprising control means for controlling the opening and closing of the opening / closing mechanism, thereby controlling the residence time of the raw material in the pulverization tank while maintaining the operation of the stirring member. .
(2) A cylindrical pulverization tank having a horizontal pulverization chamber, provided at one end of the pulverization tank, and placed in the pulverization chamber, a raw material charging section for continuously charging raw materials into the pulverization tank in a fixed amount Crushing media, media separation unit provided at the other end of the crushing tank, product discharge unit provided at the other end of the crushing chamber to discharge the crushed product, and provided in the crushing chamber and arranged horizontally And a horizontal dry type equipped with a stirring member that is driven by a rotary drive shaft driven by an electric motor and that stirs the mixture of the raw material and the grinding medium conveyed from one end to the other end of the grinding chamber to pulverize the raw material. In the crusher
An opening / closing mechanism that is provided in the product discharge section and controls the discharge of the product while maintaining the posture of the pulverization tank to control the residence time of the raw material in the pulverization tank, and the load that detects the load of the electric motor Corresponding to the load of the electric motor detected by the detection means and the load detection means, the opening / closing mechanism is controlled to open and close, thereby maintaining the operation of the stirring member, A horizontal dry pulverizer characterized by comprising control means for controlling the residence time.
(3) The horizontal dry pulverizer according to (1) or (2), wherein the opening / closing mechanism is an automatic valve provided on a discharge pipe of a product discharge portion.
(4) The control means opens the opening / closing mechanism when the load of the electric motor becomes a predetermined high load, and closes the opening / closing mechanism when the load becomes a predetermined low load. The horizontal dry pulverizer according to any one of 1) to (3).
(5) The horizontal dry pulverizer according to any one of (1) to (3), wherein the load is torque or power consumption of the electric motor or a current flowing through the electric motor.

In the horizontal dry pulverizer of the present invention, as described above, the product discharge section is provided with an open / close mechanism that controls the discharge of the product and controls the residence time of the raw material in the pulverization tank. Can be crushed to a state. That is, the raw material can be sufficiently pulverized.
Furthermore, in the horizontal dry pulverizer of the present invention, the stirring member (and thus the pulverizer) is continuously operated, and there is no need for on / off that requires a large amount of power. .

1 is a cross-sectional view illustrating a horizontal dry pulverizer according to an embodiment of the present invention. It is the schematic which shows the control system of the horizontal dry-type grinder by the embodiment of this invention. It is a figure for demonstrating the control aspect of the opening-and-closing mechanism by the embodiment of this invention.

Hereinafter, a horizontal dry pulverizer according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a horizontal dry pulverizer 10 according to an embodiment of the present invention. The horizontal dry pulverizer 10 includes a horizontal cylindrical pulverization tank 14 having a pulverization chamber 12 therein. The pulverization tank 14 is preferably made of a ceramic such as alumina, alumina zirconia and silicon nitride which are heat resistant materials. A casing 16 is provided at one end of the pulverization tank 14 (upstream side in the raw material flow—hereinafter, this member is referred to as one end for all members and parts), and the other end (downstream side in the raw material flow—following, all A medium separating member (separator) 18 and a product discharge unit 100 for discharging the pulverized product are attached to members and parts, respectively, on this side. Further, at one end of the crushing tank 14, a raw material charging nozzle 22 which is a raw material charging part is provided as shown in the figure. The structure of the media separating member (separator) 18 is not particularly limited, and for example, a plate-like member may be provided with a plurality of slits or holes.

A rotating drive shaft 24 extending horizontally from the casing 16 extends inside the grinding tank 14. The rotational drive shaft 24 is disposed coaxially with the crushing tank 14. In the crushing chamber 12, a screw that is a thrust generating means for applying a thrust in the other end direction to the crushed material charged from the raw material charging nozzle 22 is provided on one end side (below the raw material charging nozzle 22) of the rotary drive shaft 24. 26 is provided. On the other end side of the screw 26 on the rotation drive shaft 24, the first stirring arm 30 and the second stirring arm 32, which are stirring elements constituting the stirring member 28, are alternately arranged with an interval in the axial direction. Yes. The first stirring arm 30 is a pin-shaped member that is implanted on the rotary drive shaft 24. The second stirring arm 32 is a truncated cone disk 38 having a tapered surface 34 and a vertical surface 36 that gradually decrease toward one end of the grinding tank 14. As shown in the figure, the disk 38 is formed with a plurality of communication holes 40 extending obliquely in the thickness direction of the disk. A plurality of the communication holes 40 are preferably provided, and are arranged at equal intervals in the circumferential direction of the disk 38. The communication hole 40 has a first opening 42 on the relatively inner peripheral side of the vertical surface 36, and has a second opening 44 disposed on the outer peripheral side of the first opening 42 on the tapered surface 34. Yes. Due to the communication hole 40 provided in the disk 38, reflux f around the disk 38 is caused in the mixture of the pulverization medium M and the pulverized material RM filled in the pulverization chamber 12. The agitating member 28 is preferably provided with a tip arm 38a as illustrated at the tip (most side of the media separating member 18). The stirring member 28 is preferably made of a ceramic such as zirconia, silicon nitride and alumina which are wear resistant materials.
The pulverization medium M is in a granular form with a diameter of about several mm, and it is preferable that the pulverization chamber 12 is filled with about 50 to 80% of the capacity of the pulverization chamber 12.

  The rotary drive shaft 24 is rotatably supported on the casing 16 by a bearing 46, and is connected to a drive motor 108 as a drive source via a known drive mechanism (belt and pulley) 106 shown in FIG. , Driven to rotate. As shown in FIG. 1, the rotary drive shaft 24 is shaft-sealed by an oil seal 48 or the like at a portion between the bearing 46 and the screw 26 to keep the inside of the crushing chamber 12 sealed. A lantern ring 50 is provided in a portion (a portion adjacent to the oil seal) on the side of the pulverization chamber 12 from the oil seal 48 of the rotary drive shaft 24, and a gas introduction passage 52 is communicated with the lantern ring 50. ing. A gas such as air is introduced from the gas introduction passage 52. The introduced gas flows into the pulverization chamber 12 through the lantern ring 50 and prevents the raw material from entering the oil seal 48. This gas also serves to fluidize the crushed material (powder) and improve fluidity.

  A jacket 54 is provided on the outer peripheral side of the pulverization tank 14 at a distance from the pulverization tank 14, and cooling water for cooling the pulverization tank and the pulverization chamber flows through the jacket 54. Yes. In the figure, reference numeral 56 denotes a cooling water inlet nozzle, and reference numeral 58 denotes a cooling water outlet nozzle.

  The product discharge unit 100 is provided with a discharge pipe 102 for discharging the obtained product to the outside of the pulverizer, and an automatic valve as an opening / closing mechanism of the discharge pipe 102 is provided in the middle of the discharge pipe 102. 104 is provided.

  As shown in FIG. 1, a raw material supply pipe 112 of a quantitative feeder 110 which is a raw material supply machine is continuous above the raw material supply nozzle 22, and the pulverized material RM is supplied to the raw material from the quantitative feeder 110. It is supplied to the nozzle 22. For the purpose described later, the ends of the adjacent raw material supply pipe 112 and the raw material charging nozzle 22 are slightly separated from each other, and the ends are connected by a bellows-like cover (not shown). The crushed material RM is prevented from flowing out from the section.

  The fixed amount feeder 110 is normally driven to rotate continuously at a constant speed by a drive motor 114. Accordingly, the quantitative feeder 110 continuously supplies the pulverized material RM to the pulverization tank 14 at a constant amount per time.

  The horizontal dry pulverizer 10 includes a load detection device 116 that detects the load of the electric motor 114.

  The automatic valve 104, the drive motor 108 of the stirring member 28, and the drive motor 114 of the quantitative feeder 110 are connected to a control box 118 which is a control means equipped with a microcomputer and the like, and their operations are controlled. .

  The load detection device 116 detects the load of the electric motor 114 and sends a load signal S1 indicating the load to the control box 118. Examples of the load of the electric motor 114 include the torque or power consumption of the electric motor 114 or the current flowing through the electric motor 11.

Next, the operation of the horizontal dry pulverizer 10 will be described.
First, when the control box 118 is turned on, the control box 118 confirms that the automatic valve 104 is closed, and then starts the drive motor 114 of the metering feeder 110 to supply the raw material crushed material RM. Start. The supply of the crushed material RM is continuously performed at a constant amount per hour. The supplied crushed material RM falls on a screw 26 in the pulverizing chamber 12 and is advanced to the other end side of the pulverizing chamber 12 by the screw 26. At this time, the thrust from the crushed material is also promoted by the gas from the gas introduction passage 52.

The stirring member 28 is continuously operated, and continuously stirs and grinds the pulverized material RM introduced into the grinding chamber 12.
At this time, the pulverized material RM is rotationally stirred together with the pulverized media M by the stirring member 28, is pinched between the pulverized media M, is subjected to impact force and grinding action, and is gradually pulverized. At the time of this pulverization, a part of the pulverized material RM and the pulverized media M enters the first opening 42 of the disk 38 and is discharged from the second opening 44 through the communication hole 40, thereby returning. f is caused. By this refluxing f, the distribution of the crushed material RM in the pulverization chamber becomes uniform, and uniform pulverization is performed. In particular, this reflux gives large kinetic energy to the grinding media, increasing the contact probability between the grinding media and increasing the grinding ability.

  During the pulverization, the control box 118 constantly monitors the load signal S1, and when the load signal S1 becomes a value indicating that a predetermined amount of the crushed material RM to be processed has been put into the pulverization chamber 12, That is, when the load of the electric motor 114 reaches a predetermined high load Lh, the opening / closing mechanism 104 is opened and this open state is maintained. When the open / close mechanism 104 is kept open, the load of the electric motor 114 gradually decreases, and when the control box 118 determines that the predetermined low load Ll is reached, the control box 118 118 closes the opening / closing mechanism 104 this time. Thereby, the residence time in the grinding | pulverization chamber of the crushed material RM which is a raw material is controlled, and the raw material is fully grind | pulverized.

When the automatic valve 104 is open, the pulverized material that has been sufficiently pulverized and refined is collected from the product discharge unit 100 as a product. At this time, the product is separated from the pulverized media M by the media separating member (separator) 18 and passes through the media separating member.

Note that the pulverized material (powder) may be agglomerated when it is refined, and may not be reduced even when pulverization energy is applied, but may increase in size. This problem can be solved by adding a grinding aid such as alcohol from the raw material charging nozzle 22.
Further, during the pulverization operation, cooling water is allowed to flow through the jacket 54 to maintain the temperature in the pulverization chamber 12 at a predetermined temperature, thereby increasing the pulverization efficiency.

DESCRIPTION OF SYMBOLS 10 Horizontal type dry crusher 12 Crushing chamber 14 Crush tank 16 Casing 18 Media separation member 22 Raw material injection nozzle 24 Rotation drive shaft 26 Screw 28 Stirring member 30 First stirring arm 32 Second stirring arm 34 Tapered surface 36 Vertical surface 38 Disc 40 Communication Hole 42 First opening 44 Second opening 46 Bearing 48 Oil seal 50 Lantern ring 52 Gas introduction passage 54 Jacket 56 Cooling water inlet nozzle 58 Cooling water outlet nozzle 100 Product discharge part 102 Discharge pipe 104 Automatic valve 106 Drive mechanism 108 Drive motor 110 Metering feeder 112 Raw material supply pipe 114 Drive motor 116 Load detection device 118 Control box

Claims (5)

A cylindrical pulverization tank having a horizontal pulverization chamber, provided at one end of the pulverization tank, a raw material charging unit for continuously charging raw materials into the pulverization tank, a pulverization medium placed in the pulverization chamber, An agitating member provided in the pulverization chamber, horizontally disposed and driven by a rotary drive shaft driven by an electric motor to agitate a mixture of the raw material and the pulverization medium to pulverize the raw material, and the other end of the pulverization tank In a horizontal dry pulverizer equipped with a media separation unit provided in a product discharge unit for discharging a pulverized product,
An opening / closing mechanism provided in the product discharge unit for controlling discharge of the product by opening and closing, a load detection means for detecting a load of the electric motor, and a load of the electric motor detected by the load detection means. A horizontal dry pulverizer characterized by comprising control means for controlling the opening and closing of the opening / closing mechanism, thereby controlling the residence time of the raw material in the pulverization tank while maintaining the operation of the stirring member. . A cylindrical pulverization tank having a horizontal pulverization chamber, provided at one end of the pulverization tank, a raw material charging unit for continuously charging raw materials into the pulverization tank, a pulverization medium placed in the pulverization chamber, A media separation unit provided at the other end of the pulverization tank, a product discharge unit provided at the other end of the pulverization chamber for discharging the crushed product, and provided in the pulverization chamber, disposed horizontally, and electrically In a horizontal dry pulverizer equipped with a stirring member that is driven by a rotary drive shaft driven by a motor and that stirs the mixture of the raw material and the pulverized media conveyed from one end to the other end of the pulverization chamber to pulverize the raw material ,
An opening / closing mechanism that is provided in the product discharge section and controls the discharge of the product while maintaining the posture of the pulverization tank to control the residence time of the raw material in the pulverization tank, and the load that detects the load of the electric motor Corresponding to the load of the electric motor detected by the detection means and the load detection means, the opening / closing mechanism is controlled to open and close, thereby maintaining the operation of the stirring member, A horizontal dry pulverizer characterized by comprising control means for controlling the residence time. The horizontal dry pulverizer according to claim 1 or 2, wherein the opening / closing mechanism is an automatic valve provided in a discharge pipe of a product discharge portion. The control means opens the opening / closing mechanism when the load of the electric motor becomes a predetermined high load, and closes the opening / closing mechanism when the load becomes a predetermined low load. The horizontal dry pulverizer according to any one of the above. The horizontal dry pulverizer according to any one of claims 1 to 3, wherein the load is torque or power consumption of the electric motor or a current flowing through the electric motor.