JP2002292297A - Vertical mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized vertical mill capable of easily producing a ground material (b) having particle size within a required range. SOLUTION: This vertical mill for feeding a material to be ground (a) into the space between the table 8 and each of roller tires 9 and subjecting the material (a) to crush grinding, is provided with a casing 11 of an oil hydraulic cylinder 10 for elevating and lowering the table 8, placed on the ground G, a motor M for rotating the table 8, also placed on the ground G, a piston 12 of the hydraulic cylinder 10 and a rotary shaft 8a of the rotary table 8, both of which are integrally formed, wherein the rotary shaft 8a is connected to the rotary shaft 20 of the motor M with an Oldham's coupling 21 so that elevation/lowering of the table 8 is absorbed by the Oldham's coupling 21. Thus, by separating the elevation/lowering means and the rotation means of the table 8 from each other, since the need of elevating and lowering the rotation means by the elevation/lowering means is eliminated, the size of the vertical mill can be reduced. Further, both the inclination angle θ of each of the roller tires 9 and the inclination angle θ1 of each of the concave faces of the table 8 are adjusted to 25-40 deg.C so that the level of the peripheral edge of the table 8 is higher than the crush-grinding position, to prevent unnecessary discharge of the ground material (b) out of the table 8 from being caused and to produce the ground material (b) having particle size within a required range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical mill for feeding a crushed material between a rotary table and a roller tire to crush and crush.

[0002]

2. Description of the Related Art A vertical mill will be described with reference to FIGS. 1 and 11 showing an embodiment of the present invention. A table 8 is rotatably provided in a mill casing (upper and lower frames 2, 3). At the same time, the roller tire 9 is brought close to the table 8, and the crushed material a is sent between the table 8 and the roller tire 9 to perform crushing crushing or crushing crushing.

[0003] In the crushing (pulverization) by this vertical mill, the crushing efficiency can be increased or the crushed material b having a required range of particle size can be obtained.
When the number of revolutions of the table 8 is increased to obtain (crushed material b '), the crushed material a on the table 8 is easily transferred outward by centrifugal force, and is discharged without being sufficiently crushed.
For this reason, conventionally, the table rotation speed cannot be increased so much, and there are many problems.

According to the present invention, even if the table rotation speed is increased,
Crushed material a is an object of the invention to avoid being discharged without being crushed in the exception table.

[0005]

In order to achieve the above object, according to the present invention, the angle of inclination of the roller tire with respect to the table and the angle of inclination of the concave curved surface of the table are made smaller than before. That is, conventionally, the inclination angle of the roller tire with respect to a perpendicular line (vertical line) passing through the center of the table is about 10 ° to 15 °, and the inclination angle between the horizontal surface of the concave curved surface of the table and the horizontal line is almost the same. I was This tilt angle, often from jumping out of the rotary table of crushed, can not be increased table speed was difficult to obtain a crushed material of the particle size of the required range. For this reason, when the inclination angle was reduced, the protrusion was gradually reduced. Based on this finding, in the present invention, the both inclined angle of 20 ° to 40 °, preferably 25
° It was a ~40 °. Also, it may both inclined angle is the same, the curvature of the curvature and the table concave surface of the outer peripheral surface of the roller tire the same.

With this configuration, the outer peripheral edge of the table is relatively higher than the position where the crushed material is pinched and crushed between the concave curved surface of the table and the roller tire, and the protrusion due to the centrifugal force is reduced as compared with the related art. . For this reason, the crushed material in the concave curved surface of the table is sufficiently crushed without being discharged (suppressed) by centrifugal force until it reaches a predetermined particle size. Thereby, a product having a good particle size distribution can be obtained. The reason why the inclination angle is set to 20 ° or more is that if the angle is less than 20 °, a dam ring for preventing the crushed material from popping out of the table is necessarily required as in the conventional case. On the other hand, the reason why the angle is set to 40 ° or less is that when the angle exceeds 40 °,
The lateral protrusion of the roller tire increases, and the machine width increases.

In order to prevent the machine width from increasing,
It is sufficient to bring the roller tire closer to the center, but at this time, the shooting chute becomes an obstacle. Accordingly, or a tapered shape toward the lower portion of the chute, by raising the input chute upward, better to avoid roller tires.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention relates to a vertical mill in which a crushed material is fed between a rotating table and a roller tire close to the table to pinch and crush the table. , And the inclination angle between the horizontal line of the concave curved surface of the table and the horizontal line of the concave curved surface of the table is 20 to 40 degrees.

In this configuration, a structure in which a dam ring can be moved up and down around the entire outer periphery of the table can be adopted, and the up and down movement of the dam ring employs an adjustable cylinder and a screw jack. Further, if the vertical movement is performed through an inclined surface in the vertical direction, fine adjustment of the vertical movement is easy. Further, in order to prevent the roller tire from jumping to the center, it is preferable that the diameter of the cylindrical charging chute is gradually reduced downward.

Here, if the crushed material is sufficiently prevented from jumping out by setting the two inclination angles, it is not necessary to control the raising / lowering of the dam ring. Since only this is necessary, automation becomes easy. Also, if there is no dam ring lifting means,
The structure becomes simple. However, if the lifting of the dam ring, it becomes easier to obtain the required particle size.

[0011] As this In the vertical mill, the rotating means and the elevating means of the table respectively installed in the ground, to transmit the rotational force to absorb the vertical movement of its axis of rotation from the rotating means to the rotating axis of the table Can be. In this manner, if the lifting means is separated from the rotating means, the lifting means does not need to raise and lower the rotating means, and can be downsized accordingly.

More specifically, in a vertical mill that sends crushed material between a rotating table and a roller tire close to the table to crush and crush the table, the table is supported by a hydraulic cylinder or the like so as to be able to move up and down. rotating means such as a motor of the elevating means and said table respectively installed in the ground, configured to transmit a rotational force to absorb the vertical movement of its axis of rotation from the rotating means to the rotating axis of the table.

As one specific means for absorbing the elevation of the rotary shaft, a configuration in which a pulley that is movable in the axial direction of the rotary shaft of the table and is integrated in the rotational direction can be adopted. In this configuration, the pulley is rotated by the rotating means, and the rotational force can be transmitted to the rotary shaft by absorbing the elevation of the rotary shaft by moving the pulley in the axial direction with respect to the rotary shaft.

As another specific means, it is possible to adopt a configuration in which a spur gear is fitted on a rotating shaft of the table, and a pinion rotated by the rotating means is engaged with the spur gear. In this configuration, the vertical movement of the rotating shaft is absorbed by the latitude of the toothed direction of the spur gear meshing with the spur gear,
The rotation force is transmitted to the rotation shaft.

Further, as another specific means, a hydraulic cylinder serving as the elevating means is rotatably provided on the ground around its axis, and a piston rod of the hydraulic cylinder is used as a rotation axis of the table, and It is possible to adopt a configuration in which the rod is not rotatable with respect to the cylinder casing and the cylinder casing is rotatable by the rotating means. In this configuration, the vertical movement is absorbed between the cylinder casing and the piston rod.

Further, in any of the vertical mills of pulverization and crushing, as another specific means of the absorbing means, a casing of a hydraulic cylinder serving as the elevating means is fixed to the ground, and the piston is attached to the piston. The rotary shaft of the table may be integrated in the vertical direction, and the rotary shaft of the table may be rotatable to the casing so that the rotational force of the motor absorbs the vertical movement of the piston and is transmitted. The rotation of the table rotating shaft with respect to the casing may be obtained by freely rotating with respect to the piston (see the embodiment), or the piston may be freely rotated with respect to the casing.

In the configuration using these hydraulic cylinders, the motor, the hydraulic cylinder, and the table are the same if the table rotation shaft penetrates the casing and is coaxial with the output shaft of the motor. Since they are located on a straight line, the installation space for the motor and hydraulic cylinder on the ground is reduced, and the size of the mill itself can be reduced.

The means for absorbing the vertical movement of the piston (rotating shaft) is required to adopt a flexible joint movable in the axial direction, for example, an Oldham joint, which can absorb the misalignment of the shaft center and has a high production accuracy. However, the manufacturing cost can be reduced. At this time, the Oldham coupling transmits the torque of the motor to the table rotation shaft directly or via a piston. That is, the table rotation shaft is directly rotatable with respect to the piston, and the table rotation shaft is integrated with the piston in the rotation direction via the piston. May convey directly to the table rotating shaft even if this integral.

Further, to face the opening of the input chute of crushed material to the table top, when the gap opening and table top of the chute can be adjusted by the lifting of the chute, the gap the input of the crushed material Can be adjusted by adjusting. As a specific configuration, the charging chute is formed of a telescopic double pipe, and a pipe facing an upper surface of the table can be moved in an axial direction with respect to another pipe by a cylinder by a cylinder. A sensor which is detected by a feeder opening detecting mechanism and input to the control unit, and the gap is adjusted and controlled via the control unit may be employed.

Further, in any of the above vertical mills, the roller tire is fixed to the casing so as not to swing, and the table is raised and lowered with respect to the roller tire so that the gap between them is constant. The configuration can be adopted such that the table rotation speed can be freely rotated at a high speed. With such a configuration, the number of table rotations can be set to be significantly large. In the conventional type, in which the roller tires are pressed by pressure springs, the rolling force of each roller tire is adjusted independently, so when trying to increase the table rotation speed, the rolling force from the roller tires varies, so the particle size is appropriate However, if the roller tire is fixed as in the above configuration and the table is raised and lowered so that the gap is always constant, the number of rotations of the table can be increased several times Even if the size is increased to an appropriate level, an appropriate particle size can be secured.

[0021]

1 to 6 show an embodiment of a vertical mill in which upper and lower frames (casings) 2 and 3 are fixed on a machine frame 1 and the inner periphery of the lower frame 2 is fixed. An arm 2a is provided in the quartile, and this arm 2a
, A hydraulic cylinder 10 is supported via a support ring 4. The upper frame 3 attached lid 5, the lid 5
A cylindrical chute 6 for crushed material a is provided at the center.

A rotary table is provided at the axis of the hydraulic cylinder 10.
8 is provided.
A tire 9 is provided. This roller tire 9 is on top
A rotatable frame 3, the table 8 is rotated
Crushed material a is charged from the charging chute cylinder 6
Once, the crushed material a and the roller tire 9 Table 8
Are nipping crushed between. Center line O of rotary table 8
The angle θ formed by the roller tire 9 is 20 ° to 40 °, and 2
5 ° to 40 °. Also, the concave curved surface of the table 8
Forming an inclination angle between the horizontal θ₁Is the same as the angle θ,
Preferably, θ ₁= Θ. Further, the rotary table 8
To the curvature of the outer peripheral surface of the concave surface and the roller tire 9 the same
You.

An annular dam ring 71 is provided on the outer periphery of the turntable 8, and the dam ring 71 is supported by a holding member 72. The holding member 72 is supported by a cylinder 73 via an inclined surface 72a. Inclined surface 74 of lifting member 74
a. The cylinder 73 is swingably supported by a fixed frame 75 on the lower surface of the table 8, and moves up and down the elevating member 74 according to an instruction from the control unit 80. As a result, the dam ring 71 moves up and down via the inclined surfaces 72a and 74a, and finely adjusts the amount of the crushed material a discharged from the table 8. Although three cylinders 73 are provided at equal intervals around the circumference, the number is arbitrary. Control unit 80, as shown in FIG. 5,
An oil tank 81, a pump 82, a motor 83, a solenoid valve 84, and a distribution valve 85 are provided, and a hydraulic pressure is applied to each cylinder 73 via a hydraulic pipe 86.

As shown in FIG. 4, the power supply to the control unit 80 and the transmission of the control signal are performed by externally guiding an electric wire 86a into an annular container 87 concentric with the rotating shaft 8a. It is connected to a conductive fluid 87a. On the other hand, a ring-shaped conductor piece 89 is inserted into the conductive liquid 87a from the support base 80a of the control unit 80 via an insulating plate 88, and this conductor piece 8
An electric wire 86b is guided from 9 to the control unit 80. The number of power supply / signal transmission components such as the container 87 is appropriately determined according to the number of power supply / signal transmission. Regardless of the rotation of the table 8, the members (the conductive liquid 87) are supplied from the external electric wire 86a.
a) and a control signal is transmitted to the control unit 80 via the electric wire 86b. The control signal may be a radio. In this case, only power supply is required. Dam ring 7
Even if 1 moves up and down, the conductor piece 89 does not come out of the conductive liquid 87a. The lifting mechanism of the dam ring 71 may be omitted. At this time, the dam ring 71 can be fixed to the table 8.

A conical pointed member 90 is provided at the center of the table 8, and the crushed material a is guided around the table 8 by the pointed member 90. A hardfacing 90a is formed on the surface of the pointed member 90. Further, the input chute 6 has a funnel shape narrowed downward, and by this shape, the crushed material a hits the pointed member 90 and is reliably guided around the table 8.
Pointed member 90 may be screwed to the table 8, but can also be molded integrally with the table 8.

The hydraulic cylinder 10 is provided in Japanese Patent Publication No.
As shown in FIG. 2, a casing 11 is fixed to the support ring 4 and a cylindrical piston 12 is provided in the casing 11 so as to be able to move up and down. Hydraulic chambers 13 a and 13 b are formed above and below the piston 12 in the casing 11.
Oil pipes 14a and 14b are connected to the upper hydraulic chamber 13a and the lower hydraulic chamber 13b, respectively, by supplying oil to the upper hydraulic chamber 13a and discharging the lower hydraulic chamber 13b.
The piston 12 is moved upward by oil replenishment and draining from the upper hydraulic chamber 13a. The piston 8 has the table 8
Is rotatably inserted through a bearing 15 so as to be integrated in the elevating direction. The piston 12 is provided with a linear scale 16.
6, the amount of movement of the piston 12 is detected.

The hydraulic circuit 30 for raising and lowering the piston is shown in FIG.
The hydraulic pressure is applied from the tank T to the upper and lower hydraulic chambers 13a and 13b in the cylinder 11 by the motor / pump 31 via the switching valve 32 and the check valves 33 and 34. Therefore, as described above, when oil is supplied to the upper hydraulic chamber 13a by the switching valve 32 (the state shown in FIG. 2B),
The piston 12 descends, and conversely, when oil is supplied to the lower hydraulic chamber 13b (the state of FIG. 3A), the piston 12 rises.
The vertical movement of the piston 12 is the vertical movement of the table 8,
The amount of elevation (gap δ ₁ between table 8 and roller tire 9)
Is detected by the linear scale 16, and when the required position is reached, refueling is stopped.

That is, when the gap δ ₁ is changed in a narrowing direction, for example, when the gap is narrowed due to widening due to abrasion, the switching valve 32 is switched to switch the hydraulic pump 31 as shown in FIG. When the hydraulic pressure is applied to the lower hydraulic chamber 13b of the hydraulic cylinder 10 via the oil pipe 14b, the piston 12 rises with the rise of the hydraulic pressure, and the table 8 rises in synchronization. As the piston 12 rises, the oil pressure in the upper hydraulic chamber 13a also rises, and the rise in the oil pressure releases the spring of the check valve 34, so that the oil in the upper hydraulic chamber 13a flows into the tank T. to. Set amount only piston 12
Is raised, the hydraulic pump 31 is stopped.

On the other hand, the gap [delta] _1, for example, equal to or wider in order to increase the particle size of the crushed slightly, when changing the setting in the direction to widen, and FIG. 6 (b), as shown in control valve (3)
When the hydraulic pressure is switched to 2 and the hydraulic pressure is applied to the upper hydraulic chamber 13a of the hydraulic cylinder 10 via the oil pipe 14a by the motor / pump 31, the piston 12 descends and the table 8 descends synchronously. At this time, the oil in the lower hydraulic chamber 13b is
Since the hydraulic pressure of b applies the pilot pressure to the check valve 33 to open it, it flows into the tank T via the oil pipe 14b. When the piston 12 descends by the set amount, the switching valve 32 is set in FIG.
Switch from (b) to (a) and stop the motor / pump.

At the time of this adjustment, the gap δ ₁
Gap detection mechanism, i.e., is detected by such as a linear scale 16, the detection result is input to the control unit of the vertical mill (not shown). When setting change gap [delta] ₁ inputs the change set values to the control unit, a predetermined value hydraulic circuit 30 is activated by the control unit.

With this operation, when the required gap δ ₁ is reached, the hydraulic cylinder 10 is moved up and down by the upper and lower hydraulic chambers 13a, 13a
b are both state constant pressure is enclosed. That is,
Since the backflow of the lower hydraulic chamber 13b is prevented by the check valve 33, only the pressure due to its own weight of the table 8 and the like is generated, while the backflow of the upper hydraulic chamber 13a is controlled by the spring of the check valve. The upper and lower hydraulic chambers 1
3a and 13b are in a state where the pressure is balanced. Incidentally, the upper and lower hydraulic chambers 13a, 13b is not that must have always balanced, the upper hydraulic chamber 13
a may be open. Thus, check valve 34 may be omitted. Incidentally, the check valve 34 has an effect of adjusting the return amount of the oil in the upper hydraulic chamber 13a when the piston 12 is raised at the time of setting the gap. When the upper hydraulic chamber 13a is open,
When oil is poured into the lower hydraulic chamber 13b, the piston 12 rises quickly. Therefore, it may use a throttle valve and an orifice in place of the check valve 34. Since the gap [delta] ₁ of set need only raise and lower the table 8 by a single hydraulic cylinder 10 and the hydraulic circuit 30, is easy.

Further, at the time of crushing action, intrude large crushed a between the rollers tire 9 and Table 8,
When the layer thickness increases and a high load (impact force) occurs, the lower hydraulic chamber 1
Since pressurization occurs in 3a, oil is supplied to the upper hydraulic chamber 13b through the relief valve 35. This refueling, the upper and lower hydraulic chamber 1
Since 3a and 13b have the same sectional area, the piston 1
Oil capacity fit Hitoshiri the second moving amount to absorb the impact force and moves. This relief valve 35 is preferably of a high flow type. In the figure, 36 is a strainer, 37 is a pressure gauge, 37a
Is an oil level gauge, 38 is an air freezer, and 39 is a relief valve. This relief valve 39 releases the pressure when the oil pressure in the oil pipe 14b from the pump 31 becomes abnormally high for some reason.

[0033] The lower portion of the support ring 4 is supported frame 17 is fixed, the reduction gear N is provided on the frame 17, the motor M is connected to the speed reducer N. The rotation shaft (output shaft) 20 of the reduction gear N and the table rotation shaft 8a have the same axis and are connected by an Oldham coupling 21 which is a flexible coupling movable in the axial direction. The Oldham coupling 21
As shown in FIG. 3, a member 21a fixed to the motor rotation shaft 20 and a member 2a fixed to the table rotation shaft 8a
1b, and a floating cam member 21c fitted to both members 21a and 21b. The method of transmitting the rotational force to the output shaft 20 can also be performed via a motor, a reduction gear, or the like that is not installed on various types of rotating shafts described later and known.

The member 21b of the Oldham's joint 21 is integrated with a rotary shaft 8a by screwing a retaining ring 21d to both of the members 21c and 8a, and the member 21a is integrated with the rotary shaft 20 by a key. The cam 21c is a member 21
a guide 21e fixed to a, stop plate 21f, packing 2
It is movably supported in only one direction via 1g. The Oldham coupling 21 is capable of transmitting a rotational force even if the axes of the two rotating shafts 8a and 20 are misaligned, and is easy to assemble them. The joint portion member 21a and the member 2
Intrusion of dust is prevented by covers 22a and 22b provided on the 1b side, respectively. As the flexible joint, a slide (sliding type) shaft joint that allows the table 8 to move up and down with respect to the fixing of the motor M, for example, a gear shaft joint, a spline shaft joint, and the like, which will be described later, can be used instead of the Oldham joint 21.

[0035] This embodiment is the above construction, the upper and lower hydraulic chamber 13a of the hydraulic cylinder 10, by supplying and discharging oil to 13b, by elevating the table 8, a gap [delta] ₁ of the roller tire 9 the required to value. After that, when the table 8 is rotated by the motor M and the crushed material a is thrown in, the crushed material is pinched and crushed while maintaining the gap δ ₁ between the table 8 and the roller tire 9. next, the crushed material b falls from around the table 8 below. At this time, the crushed material a
Abuts on the pointed member 90 and diffuses around the pointed member 90 to be smoothly pulverized. Also, appropriate to lift the dam ring 71,
The crushed material b having a required particle size width is discharged from the table 8.

In the vertical mill having the above structure, the roller tire 9
Is fixedly mounted on the upper frame 3 and cannot swing.
Said adjustment is performed beforehand so that the clearance [delta] ₁ becomes a desired value for the roller tires 9. Therefore, it can be much larger the rotation speed of the table 8 by the motor M. This is because the roller tires 9 are set at the same interval δ _{1 with} respect to the table 8 so that the crushing particle size can be made uniform even when the rotation speed of the table 8 is increased.

[0037] For example, in the illustrated example can be 60~120rpm the rotational speed of the table 8, which employs a high-speed rotational speed 2 to 3 times the contrast was 30~40rpm in the conventional example it and will, as a result grinding (crushing)
So that the ability of the (production capacity) can be significantly improved.

FIGS. 7 to 11 show other embodiments, each of which is provided with a dam ring 71 and a mechanism for raising and lowering the dam ring 71 in the same manner as in the above embodiment, but may be omitted. At that time, the dam ring 71 can be fixed to the table 8. FIG.
In the embodiment shown in FIG. 8, the roller tire 9 is supported by a trunnion joint 9b and is pressed in the direction of the table 8 by a pressing spring 45. The rotating shaft 8a of the table 8 is surrounded by a lifting cylinder 47, and is rotatably supported by a radial bearing 48 above the lifting cylinder 47. A thrust self-aligning roller bearing 52 is provided between the table 8 and the elevating cylinder 47.

[0039] rotary shaft 8a is fitted a pulley 49, the pulley 49 is rotatably supported by bearings 50 and 51 and the upper and lower, both bearings 50 and 51, the support member is not shown by being fixed to the casing (frame) 2. The rotating shaft 8a and the pulley 49 are arranged as shown in FIG.
As shown in FIG. 7, a vertical ridge 53 provided on the outer peripheral surface of the rotating shaft 8a and a vertical groove 56 formed on the inner peripheral surface of the pulley 49 are engaged with each other. Are slidable in the vertical direction and integrated in the rotational direction. That is, it is a spline bearing. Note that the rotating shaft 8a and the pulley 49 may slide in the vertical direction and be engaged (integrally) in the rotating direction. For example, as shown in FIG. The cross section of the shaft 8a is square,
A well-known configuration, such as engaging the inner peripheral surface of the pulley 49 as a quadrangle corresponding thereto, may be employed. The pulley 49 is connected to a pulley 55 of a motor M with a speed reducer fixed on the ground G outside the casing 2 by a V-belt 57.
Instead of the V-belt 57, a known transmission means such as a timing belt may be employed.

[0040] The lower portion of the lift cylinder 47 is secured bottom plate 58, the hydraulic cylinder 59 is provided as a lifting means for the ground G below the bottom plate 58. The piston rod 59a of the hydraulic cylinder 59 is the bottom plate 58 is fixed as non-rotatable.

In this embodiment, the hydraulic cylinder 59 is moved up and down to raise and lower the lifting cylinder 47, the rotary shaft 8a, the table 8 and the like.
The gap δ ₁ between the roller tire 9 and the roller is adjusted. At this time, the gap δ ₁ is equal to the hydraulic cylinder 59 (actually a piston).
Is detected by measuring the amount of expansion and contraction with a displacement meter such as the linear scale 16. Further, the pulley 49 is
Cannot move in the vertical direction due to the fixed bearings 50 and 51, but when the ridge 53 slides in the groove 56, the rotating shaft 8 a moves up and down with respect to the pulley 49 to absorb the rotation.

[0042] After formation of a predetermined gap [delta] _1, by driving the motor M, to rotate the table 8, by the engagement of the projection 53 and the groove 56, the rotation is reliably rotated shaft 8a of the pulley 49 The table 8 rotates. Its crushed material a fed onto the rotating table 8, disrupted by bitten between the roller tire 9 and the table 8 which is urged by the pressure spring 45.

In the embodiment shown in FIG. 9, the spur gear 62 is mounted on the rotating shaft 8a.
Are externally fitted and fixed, and a pinion 63 is meshed with the spur gear 62. The pinion 63 is rotated by a motor M with a speed reducer via a bevel gear box 64.

In this vertical mill, the rotating shaft 8a can be moved up and down by a hydraulic cylinder 59 and receives a rotating force via a pinion 63 and a spur gear 62. At this time, the width (height) of the spur gear 62 is made larger than that of the pinion 63, so that even if the rotating shaft 8a moves up and the position of the spur gear 62 changes, the meshing between the spur gear 62 and the pinion 63 is ensured. As a result, the rotating shaft 8a can be rotated.

In the embodiment shown in FIG. 10, the rotating shaft 8a
Is a rotating shaft (piston rod) 59a having a square cross section.
The piston section 59c is designed to have a cross-sectional area larger than that of the rotary shaft section 59a and the casing 59 of the hydraulic cylinder 59.
b. The upper surface of the cylinder casing 59b is formed in an opening having a rectangular cross section, and a rotation shaft portion 59a having a rectangular cross section penetrates the opening, so that rotation with respect to the cylinder casing 59b is prohibited, and only vertical movement is allowed. You.

The hydraulic cylinder 59 is rotatably supported by a support cylinder 60 fixed to the ground G via a bearing 51 and is installed on the ground G. A rotary cylinder for supplying and discharging oil is provided at a lower end of the hydraulic cylinder 59. A joint 65 is provided. Through the rotary joint 65, the oil in the hydraulic cylinder 59 is supplying and discharging the hydraulic pump is not shown, the table 8 by the lifting piston portion 59c rotating shaft 8a is lifting integrally.

The pulley 4 is in the cylinder casing 59b
9 'is fixed, the pulley 49' by is rotated by a motor M (not shown), a cylinder casing 59b is rotated, the table 8 is also rotated.

Although each of the above embodiments is for the case of crushing sand or the like, each of these embodiments can also be employed in the case of crushing. At this time, for example, as shown in FIG. 11, the crushed material a is put on the table 8 from the screw feeder 60,
The pulverized material b ′ is conveyed by the air introduced from the lower part of the casing 2, rises, passes through the classifier 61, and is guided to a collector such as a bag filter, so that the pulverized material b ′ can be formed into a vertical mill for pulverization.

In the embodiments after FIG. 7, the hydraulic cylinder 59 is controlled by the hydraulic circuit 30 shown in FIG. Further, the roller tire 9 does not apply the pressing force by the pressing spring 45, and may not swing as shown in FIG.

Further, the present invention can be applied to the configuration shown in FIG. In addition, the rotary table 8 does not move up and down.
The present invention can be employed.

[0051]

According to the present invention, as described above, the amount of crushed material discharged from the table can be adjusted.
Efficient crushing can be performed, and a crushed product having a required particle size range can be easily obtained.

[Brief description of the drawings]

1 is a schematic cross-sectional view of an embodiment

[Figure 2] cross sectional view in a state where the piston of the embodiment is increased

FIG. 3 is an exploded perspective view of the Oldham coupling of the embodiment.

FIG. 4 is an enlarged sectional view of a main part of the embodiment.

FIG. 5 is a layout diagram of a hydraulic device for lifting and lowering the dam ring of the embodiment.

FIG. 6 is a hydraulic circuit diagram of the embodiment.

FIG. 7 is a schematic sectional view of a main part of another embodiment.

FIG. 8 is a cross-sectional view showing each example of fitting of the table rotating shaft and the pulley of the embodiment.

FIG. 9 is a schematic cross-sectional view of a main part of another embodiment.

FIG. 10 is a schematic sectional view of a main part of another embodiment.

FIG. 11 is a schematic sectional view of a main part of another embodiment.

[Explanation of symbols]

a crushed b crushed b 'pulverized G Ground M table rotating motor theta ₁ roller tire angle of inclination theta ₂ tables concave surface of the inclined angle 2,3 mill casing (vertical frame) 6 chute 7a chute telescopic cylinder 7c Table / feeder opening detection mechanism (linear scale) 8 Table 9 Roller tire 10 Hydraulic cylinder 11 Cylinder casing 12 Piston 13a, 13b Hydraulic chamber 20 Motor rotating shaft (output shaft) 21 Oldham coupling 30 Hydraulic circuit 45 Pressure spring 47 Up / down cylinder 49, 49 'rotating shaft pulley 55 pulley 59 hydraulic cylinder 59b cylinder casing 60 supporting tube 62 spur gear 63 pinion 71 dam ring 72 dam ring holding member 73 elevating cylinder 72a, 74a inclined surface 74 lifting member 90 pointed member

Claims (3)

[Claims] 1. A vertical mill in which a crushed material (a) is fed between a rotating table (8) and a roller tire (9) adjacent to the table (8) to crush and crush it. A vertical mill, wherein an inclination angle θ with respect to a vertical line and an inclination angle θ between a horizontal line of the concave curved surface of the table 8 and the horizontal line are respectively 20 to 40 degrees. 2. The vertical mill according to claim 1, wherein a dam ring 71 is provided so as to be able to move up and down around the entire outer periphery of the table 8. 3. A cylindrical input chute 6 for crushed material a is provided at the center of the table 8 with a required gap from the table 8, and the diameter of the input chute 6 is gradually reduced downward. The vertical mill according to claim 1 or 2, wherein