JP6024302B2 - Vertical crusher - Google Patents

Description

  The present invention relates to a vertical pulverizer, and more particularly to a technique for reliably pulverizing an object to be pulverized by reducing a burden on a pulverizing roller constituting the vertical pulverizer.

Conventionally, a crusher called a vertical crusher (a vertical mill or a vertical roller mill) has been widely used as a crusher for crushing coal, oil coke or the like.
In recent years, in particular, the number of cases in which raw materials are finely pulverized by a vertical pulverizer is increasing, and the number of vertical pulverizers having a classification mechanism in the vertical pulverizer is increasing. The vertical crusher includes a rotary table, a crushing roller that is pressed against the outer peripheral side of the upper surface of the rotary table and rotates as the rotary table rotates, a casing that houses the rotary table and the crushing roller, and a lower part of the rotary table. It has an airflow generation means for generating an airflow to the upper part in the casing, and a classification mechanism arranged in the upper part in the casing (see Patent Document 1).

  The material to be crushed is put into the center of the upper surface of the rotary table and moves to the outer peripheral side of the rotary table by the centrifugal force accompanying the rotation of the rotary table. The object to be crushed is caught between the rotary table and the pulverizing roller and pulverized, and the pulverized substance is discharged from the outer periphery of the rotary table. The pulverized product is lifted and conveyed by the airflow blown from the lower part of the rotary table, and only the fine powder screened by the classification mechanism is taken out of the casing.

JP 2008-178837 A

  By the way, the crushing roller has a structure that undulates with a position on the outer peripheral side of the rotary table as a fulcrum with respect to the crushing roller, and is biased in a direction to press the outer peripheral surface of the crushing roller against the upper surface of the rotary table. The outer peripheral surface of the grinding roller is in surface contact with the upper surface of the rotary table at the initial position of the grinding roller before grinding the object to be ground.

  Thus, when the object to be crushed is caught between the rotary table and the pulverizing roller, the object to be pulverized is pulverized, and the pulverizing roller rotates while being lifted with the object to be pulverized as a base, and pulverizes with the rotating table. A gap is formed between the rollers.

  At this time, the displacement amount on the center side of the rotary table of the grinding roller (the free end side of the grinding roller) is larger than the displacement amount on the outer peripheral side of the rotary table of the grinding roller (fixed end side of the grinding roller). For this reason, the part of the outer peripheral surface of the crushing roller that faces the rotary table is inclined toward the outer peripheral side of the rotary table, and the gap between the rotary table and the crushing roller becomes smaller toward the outer peripheral side of the rotary table. As a result, the object to be crushed is intensively pulverized at a position biased toward the outer peripheral side of the rotary table on the outer peripheral surface of the pulverizing roller, and the deterioration of the portion is promoted, thereby reducing the life of the pulverizing roller. There was a problem.

  Further, the object to be crushed moves to the outer peripheral side of the rotary table by centrifugal force even during pulverization by the pulverizing roller. For this reason, there is a problem that the pulverization efficiency is lowered because an object to be pulverized that has not been sufficiently pulverized leaks from the pulverization roller.

  Accordingly, a first object of the vertical crusher of the present invention is to use a vertical crusher in which the crushing roller disposed on the rotary table undulates with the position on the outer peripheral side of the rotary table as a fulcrum from the crushing roller. The object is to uniformly pulverize the object to be crushed on the outer peripheral surface of the roller to reduce the burden on the pulverizing roller.

  The second object of the vertical grinder of the present invention is to increase the grinding efficiency by reducing the spilled material from being spilled between the rotary table and the grinding roller during the grinding.

In order to achieve the above object, a vertical crusher of the present invention has a rotary table and a crushing roller that is in rolling contact with the upper surface of the rotary table, and the crushing roller is more of the rotary table than the crushing roller. It is a vertical pulverizer that can be raised and lowered with a position on the outer peripheral side as a fulcrum, and pulverizes the object to be crushed between the rotary table and the pulverizing roller, and when pulverizing the object to be crushed, the gap between the grinding roller and the rotary table, the Ri from the center side of the rotary table name as a constant in the direction toward the outer peripheral side, the outer peripheral surface of the grinding roller, protrude from the outer peripheral surface The ridge line portion is inclined and extends in the direction opposite to the rotation direction of the crushing roller from the center side of the rotary table toward the outer peripheral side, and the crushing roller is in the middle of the ridge line portion. Characterized in that it has a shape extending bent in the rotational direction.

  With the above configuration, the object to be crushed can be reduced from being intensively pulverized at a specific position of the crushing roller, and the object to be pulverized can be crushed on the entire outer peripheral surface of the crushing roller to reduce the burden on the crushing roller. it can.

  In the present invention, the crushing roller is biased in the direction of pressing the rotary table, and at the initial position before biting the object to be crushed, a gap between the crushing roller and the rotary table is It is characterized by expanding from the center side to the outer periphery side of the rotary table.

  With the above configuration, when the object to be crushed is caught between the rotary table and the crushing roller, the object to be crushed is pulverized by the urging force or the weight of the crushing roller, and the crushing roller rotates while lifting the object to be crushed as a base. Move. At this time, the amount of displacement of the outer surface of the grinding roller facing the rotary table (grinding surface) due to the rotation of the grinding roller is such that the center side of the rotary table of the grinding surface is more than the outer circumference of the rotary table of the grinding surface. Also grows. On the other hand, the pulverization surface is inclined toward the center of the rotary table at the initial position before pulverizing the object to be crushed. For this reason, the inclination of a grinding | pulverization surface is relieve | moderated by rotation of a grinding | pulverization roller, and the part can be leveled. Therefore, the burden on the grinding roller can be reduced with a simple configuration.

In the present invention, an inclination angle of a portion of the outer peripheral surface of the crushing roller facing the rotary table is in a range of 3 degrees to 5 degrees.
By the said structure, the optimization for grind | pulverizing a to-be-ground material in the whole grinding surface of the outer peripheral surface of a grinding roller can be aimed at.

  In the present invention, a ridge line portion protruding from the outer peripheral surface is disposed on the outer peripheral surface of the crushing roller, and the ridge line portion is opposite to the rotation direction of the crushing roller from the center side of the rotary table toward the outer peripheral side. It extends in a slanting direction, and has a shape that is bent and extended in the rotation direction of the crushing roller in the middle.

  With the above configuration, the object to be pulverized can be held in the region surrounded by the bent portion of the ridge line portion on the outer peripheral surface of the pulverizing roller. Spilling out can be reduced, and the pulverization efficiency of the object to be pulverized can be increased.

In the present invention, the ridge line portion extends from the bent position of the ridge line portion toward the center side of the rotary table, and extends from the bent position of the ridge line portion toward the outer peripheral side of the rotary table. An outer ridge line portion, and on the outer peripheral surface, the end portion on the center side of the rotary table of the crushing roller and the end portion on the outer peripheral side of the rotary table of the crushing roller are connected in the shortest and The angle formed between the straight line passing through the outer edge of the rotary table and the outer ridge line part of the outer ridge line part is 40 degrees, and the angle formed between the straight line and the inner ridge line part is 10 degrees. It is a degree.
By the said structure, the optimization of the effect which hold | maintains the to-be-ground material of the part enclosed by the inner side ridgeline part and the outer side ridgeline part can be aimed at, and the optimization of the grinding | pulverization efficiency of a to-be-ground material can be aimed at.

  In the present invention, a groove is disposed at a position on the upper surface of the rotary table facing the crushing roller, and the groove is inclined in the rotation direction of the rotary table from the center side to the outer peripheral side of the rotary table. And has a shape that is bent in the rotation direction of the rotary table and extends in the middle thereof.

  With the above configuration, the portion extending from the bent portion of the groove toward the center side of the rotary table feeds the object to be crushed by the pulverizing roller to the center side of the rotary table. Moreover, the part extended toward the outer peripheral side of the turntable from the bent part of a groove part hold | maintains to-be-ground material. Accordingly, the object to be crushed can be reliably kept at the position where the object to be crushed on the rotary table is crushed by the pulverizing roller, and the pulverization efficiency of the object to be crushed can be increased.

In the present invention, the crushing roller has a truncated cone shape that decreases in diameter toward the center of the rotary table.
With the above configuration, even in the pulverizing roller that improves the grinding effect of the object to be crushed, the pulverizing surface of the pulverizing roller can be leveled when pulverizing the object to be pulverized, and the concentration of pulverized parts of the object to be crushed in the pulverizing roller is reduced Thus, the burden on the grinding roller can be reduced.

  According to the vertical pulverizer according to the present invention, in the vertical pulverizer in which the pulverization roller disposed on the rotary table undulates with the position on the outer peripheral side of the rotary table as a fulcrum than the pulverization roller, the outer periphery of the pulverization roller Uniformly grinds the object to be ground to reduce the burden on the grinding roller, and reduces the grinding object from spilling between the rotary table and the grinding roller during grinding. Can be increased.

It is the schematic of the vertical crusher of this embodiment. It is the top view of the rotary table of this embodiment, and a crushing roller, and the elements on larger scale of a crushing roller. It is the sectional view on the AA line of FIG. It is an arrangement plan of the initial position of the crushing roller of this embodiment. It is an arrangement plan at the time of crushing of a crushing roller of this embodiment.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

  FIG. 1 shows a schematic view of a vertical crusher of this embodiment, and FIG. 2 shows a plan view of a rotary table and a crushing roller of this embodiment, and a partially enlarged view of the crushing roller. The vertical pulverizer 10 of this embodiment has a casing 12 that forms the appearance of the vertical pulverizer 10. In this casing 12, the rotary table 14, the grinding roller 22 that is in rolling contact with the upper surface 16 of the rotary table 14 (via the object to be crushed) and rotated by the rotation of the rotary table 14, and the grinding roller 22 are rotatably supported. Arms (upper arm 30 and lower arm 32) are arranged.

  Although details will be described later, in the vertical crusher 10 of the present embodiment, the crushing roller 22 constituting the crushing roller 22 can be raised and lowered with a position on the outer peripheral side of the rotary table 14 as compared to the crushing roller 22. An object to be crushed is caught between 14 and the pulverizing roller 22 and pulverized.

  When the material to be crushed is pulverized, the gap between the pulverizing roller 22 and the rotary table 14 is constant in the direction from the center side of the rotary table 14 to the outer peripheral side. Yes. In order to realize this, the crushing roller 22 is urged in the direction in which the rotary table 22 is pressed, and the gap between the crushing roller 22 and the rotary table 14 is at an initial position before the object to be crushed is bitten. The rotary table 14 is characterized by spreading from the center side toward the outer peripheral side. That is, the crushing surface 26 that is a portion of the outer peripheral surface 24 of the crushing roller 22 that faces the rotary table 14 is characterized by being inclined toward the center side of the rotary table 14 (see FIG. 4). Here, the grinding surface 26 of the outer peripheral surface 24 refers to a portion of the outer peripheral surface 24 that faces the upper surface 16 as the rotary table 14 rotates. The position is unchanged.

With the above configuration, the object to be crushed is reduced from being intensively pulverized at a specific position of the crushing roller 22, and the object to be crushed is crushed by the entire outer peripheral surface 26 of the crushing roller 22 to impose a burden on the crushing roller 22. Can be reduced.
The rotary table 14 has a circular shape and is horizontally disposed, and is connected to the electric motor 18 and the speed reducer 20 and rotates at a constant rotational speed.

  The crushing roller 22 has a rotating shaft 28 extending in the outer peripheral direction of the rotary table 14 (see FIG. 4). The distal end side of the rotating shaft 28 is rotatably supported by an arm (upper arm 30). The arm is disposed in the casing 12 at a position that is the outer periphery of the rotary table 14 in plan view. Further, the arm is pin-coupled to the lower portion of the casing 12 by a pin coupling portion 34 at a position which is the center in the height direction. As a result, the upper part of the arm above the pin coupling part 34 is the upper arm 30 (bearing part for the rotating shaft 28), and the lower part is the lower arm 32. The rotation axis of the pin coupling portion 34 is oriented horizontally. Therefore, the upper arm 30 and the lower arm 32 can be rotated in the vertical direction around the pin coupling portion 34.

  One of the hydraulic cylinders 36 in the longitudinal direction is pin-coupled to the lower portion of the casing 12, and the other in the longitudinal direction is pin-coupled to the lower arm 32. The hydraulic cylinder 36 operates in a direction in which the length in the longitudinal direction contracts. As a result, the lower arm 32 and the upper arm 30 rotate about the pin coupling portion 34, and the upper arm 30 biases the pulverizing roller 22 against the upper surface 16 of the rotary table 14. Therefore, the crushing roller 22 applies the force (and the weight of the crushing roller 22) caused by urging the object to be crushed (not shown) caught between the rotary table 14 and the crushing roller 22. It can be crushed with.

  A separator 38 and a raw material inlet 42 are provided in the upper center portion of the casing 12 facing the upper surface 16 of the turntable 14. Further, a raw material charging chute 44 is disposed so as to vertically penetrate the central axis of the separator 38, and a material to be crushed (raw material) can be charged from the raw material charging port 42 to the upper surface 16 of the rotary table 14 via the raw material charging chute 44. It is configured as follows. Here, coal, oil coke, limestone, slag, clinker, cement raw material, chemicals, etc. are applied as the material to be crushed.

  Further, the separator 38 includes a plurality of blades 40 arranged in an inverted truncated cone shape with a diameter increasing upward with the central axis of the separator 38 as a center, with a gap of a predetermined interval therebetween, and the blades are driven by a driving device (not shown). 40 is configured to be freely rotatable.

  The object to be crushed charged from the raw material charging chute 44 moves to the outer peripheral side of the upper surface 16 of the rotating table 14 while drawing a spiral trajectory on the upper surface 16 of the rotating table 14, and the upper surface 16 of the rotating table 14 and the pulverizing roller. 22 is crushed by being pinched (sandwiched) by the crushing surface 26. A part of the pulverized material obtained by pulverizing the material to be crushed passes over the dam ring 46 provided around the outer edge of the upper surface 16 of the rotary table 14, and is formed in the gap between the outer periphery of the rotary table 14 and the casing 12. Head to an annular passage 48. Here, a gas inlet 50 for introducing gas is provided below the turntable 14 in the casing 12, and an upper outlet for taking out the pulverized material together with the gas is further provided in the upper part of the casing 12. 52 is provided.

  During operation of the vertical crusher 10, by introducing gas (or air) from the gas inlet 50, the gas flows into the upper outlet 52 through the separator 38 from below the rotary table 14 in the casing 12. There is a gas flow. A pulverized product obtained by pulverizing the object to be crushed by the rotary table 14 and the pulverizing roller 22 and having reached the annular passage 48 after overcoming the dam ring 46 is blown up by the gas and ascends in the casing 12, thereby separating the separator. Reach 38.

  Here, the pulverized material having a large diameter and a large weight cannot pass through the blades 40 of the separator 38, falls below the separator 38, is re-engaged by the pulverizing roller 22, and is pulverized. On the other hand, the pulverized product having a small diameter passes through the blades 40 arranged with a gap therebetween and is taken out of the casing 12. Further, a part of the pulverized material having a maximum particle size that has not been caught in the grinding roller 22 and dropped into the annular passage 48 as it is falls below the rotary table 14 from the annular passage 48 and is removed from the casing 12 through the lower outlet 54. To be taken out.

  As shown in FIG. 2, a groove portion 56 is disposed on the upper surface 16 of the rotary table 14 at a position facing the grinding surface 26 of the grinding roller 22 by the rotation of the rotary table 14. A plurality of the groove portions 56 are arranged so as to radially spread from the position where the radius is equal to or larger than a certain radius of the rotary table 14 toward the outer peripheral side with the center O of the rotary table 14 as the center. Further, the groove 56 extends while being inclined in the rotational direction of the rotary table 14 (clockwise in FIG. 2) from the center side to the outer peripheral side of the rotary table 14, and is bent in the rotational direction of the rotary table 14 in the middle thereof. It has an extended shape.

  That is, as shown in FIG. 2, consider a line 58 that passes through the center O of the turntable 14 and the end of the groove 56 on the center O side in the longitudinal direction. Then, the groove portion 56 is disposed so as to be inclined toward the rotation direction side of the turntable 14 with respect to the position intersecting with the line 58 and extend to the outer peripheral side of the turntable 14. Here, the groove portion 56 includes an inner groove portion 60 that extends from the bent portion of the groove portion 56 toward the center side of the turntable 14, and an outer groove portion that extends from the bent portion of the groove portion 56 toward the outer peripheral side of the turntable 14. 62.

In the inner groove portion 60, among the edges of the opening portion of the inner groove portion 60, the edge opposite to the rotation direction of the turntable 14 bites the object to be crushed. Thereby, the effect of biting the object to be pulverized between the rotary table 14 and the pulverizing roller 22 is enhanced, and the pulverization of the object to be pulverized can be promoted.
In the outer groove 62, among the edges of the opening of the outer groove 62, the outer peripheral edge of the turntable 14 bites and holds the object to be crushed. Thereby, it can reduce that the to-be-ground material spills from between the rotary table 14 and the grinding roller 22 during the grinding.

  Therefore, among the groove portions 56, the inner groove portion 60 feeds the object to be crushed by the crushing roller 22 to the center side of the rotary table 14, and the outer groove portion 62 holds the object to be crushed on the turntable 14. In this case, the object to be crushed can be reliably kept at the position where it is pulverized by the crushing roller 22, and the pulverization efficiency of the object to be crushed can be increased. The bottom surface of the groove 56 may be a planar shape or a curved shape.

  As shown in FIG. 2, the crushing roller 22 has a truncated cone shape whose diameter decreases toward the center side of the turntable 14. Four pulverizing rollers 22 are arranged on the outer peripheral side of the upper surface 16 of the rotary table 14 so as to be four-fold symmetric about the center O of the rotary table 14 (in addition, the number and arrangement method of the pulverizing rollers 22 are arbitrary. Can be set). Further, the crushing roller 22 has the axial direction (longitudinal direction) of the rotary shaft 28 directed toward the center O of the rotary table 14 in plan view.

  As shown in FIG. 2, a ridge line portion 64 is disposed on the outer peripheral surface 24 of the crushing roller 22. As shown in FIG. 3 (cross-sectional view taken along the line AA in FIG. 2), the ridge line portions 64 are arranged so as to protrude from the outer peripheral surface 24, and a plurality of ridge lines 64 are arranged at regular intervals so as to go around the outer peripheral surface 24. Yes. As shown in FIG. 2 or a partially enlarged view drawn in the upper right of FIG. 2, the ridge line portion 64 is opposite to the rotation direction of the crushing roller 22 from the center side of the rotary table 14 toward the outer peripheral side of the rotary table 14. In addition to extending in a slanting direction, it has a shape that is bent in the rotation direction of the crushing roller 22 and extends in the middle. That is, the ridge line portion 64 extends from the bent position of the ridge line portion 64 toward the center side of the turntable 14, and the outer side extends from the bent position of the ridge line portion 64 toward the outer peripheral side of the turntable 14. And a ridge line portion 68.

  With such a configuration, the region surrounded by the broken line 70 in the partial enlarged view of FIG. 2, that is, the region surrounded by the bent portion of the ridge line portion 64 on the outer peripheral surface 24 (the inner ridge line portion 66 and the outer ridge line). Since the object to be crushed can be held in the region surrounded by the side wall of the portion 68, the object to be crushed can be prevented from spilling from between the rotary table 14 and the pulverizing roller 22 during the pulverization. The grinding efficiency of the object can be increased.

  On the outer peripheral surface 24 of the crushing roller 22, the end of the crushing roller 22 on the center side of the rotary table 14 and the end of the crushing roller 22 on the outer peripheral side of the rotary table 14 are connected at the shortest and the outer ridge line portion 68 rotates. Consider a straight line 72 passing through the outer peripheral end of the table 14. Then, it is preferable that the angle formed between the straight line 72 and the longitudinal direction of the outer ridge line portion 68 is 40 degrees, and the angle formed between the straight line 72 and the longitudinal direction of the inner ridge line portion 66 is 10 degrees. . By designing in this way, it is possible to optimize the effect of holding the object to be crushed in the portion surrounded by the inner ridge line part 66 and the outer ridge line part 68, and to optimize the pulverization efficiency of the object to be crushed. .

  FIG. 4 shows an arrangement view of the crushing roller of the present embodiment at the initial position. As shown in the layout diagram of FIG. 4 (cross-sectional view of the rotary table 14), the grinding roller 22 has the grinding surface 26 of the outer peripheral surface 24 at the center of the rotary table 14 at the initial position before the material to be ground is supplied. 4 (inclination angle is 3 ° to 5 °). In FIG. 4, only the end of the grinding surface 26 on the center side of the rotary table 14 is in contact with the upper surface 16 of the rotary table 14, or The upper surface 16 of the rotary table 14 is pressed. A gap is formed between the crushing surface 26 of the crushing roller 22 and the rotary table 14, and the height of the gap increases toward the outer peripheral side of the rotary table.

  The upper arm 30 is rotated so that the crushing roller 22 is displaced in the vertical direction as described above. However, a stopper (not shown) is provided on the upper arm 30 (which may be the lower arm 32), and the upper arm 30 is lower than the position where the grinding surface 26 of the outer peripheral surface 24 of the grinding roller 22 contacts the upper surface 16 of the rotary table 14. It is also possible not to rotate to a certain position. Thereby, it can avoid that the grinding roller 22 presses directly on the rotary table 14, and the contact part of the grinding roller 22 and the rotary table 14 wears.

  FIG. 5 shows a layout diagram of the crushing roller of this embodiment during crushing. When an object to be crushed (not shown) is introduced into the rotary table 14, the object to be crushed is caught between the rotary table 14 and the pulverizing roller 22 and pulverized. However, since the object to be pulverized has a certain size if it is being pulverized (even after pulverization), the pulverizing roller 22 lifts the object to be pulverized (not shown) as a base as shown in FIG. Rotate together with the upper arm 30 and the lower arm 32. At this time, in the displacement of the grinding surface 26 of the grinding roller 22 due to the rotation of the grinding roller 22, the displacement amount of the grinding surface 26 on the center side of the rotary table 14 is larger than the displacement amount of the grinding surface 26 on the outer peripheral side of the rotary table 14. Also grows.

  On the other hand, as shown in FIG. 4, the crushing surface 26 of the crushing roller 22 is inclined toward the center side of the rotary table 14 at the initial position of the crushing roller 22. For this reason, the inclination of the grinding surface 26 of the grinding roller 22 is relaxed by the rotation of the grinding roller 22, and the grinding surface 26 of the grinding roller 22 can be leveled. At this time, the width in the height direction of the gap between the rotary table 14 and the crushing roller 22 can be made constant in the direction from the center side of the rotary table 14 toward the outer peripheral side. Therefore, the object to be crushed can be pulverized by the entire pulverizing surface 26 of the pulverizing roller 22, and the object to be pulverized is pulverized at a specific portion of the outer peripheral surface 24 of the pulverizing roller 22 (the outer peripheral side of the rotary table 14 of the outer peripheral surface 24). The concentration on the crushing roller 22 can be reduced by reducing the concentration of the crushing roller.

  In order to effectively reduce the concentration of pulverization of the object to be crushed at a specific position on the outer peripheral surface 24 of the pulverizing roller 22, as shown in FIG. 4, at the initial position, the rotary table 14 of the pulverizing surface 26 of the pulverizing roller 22 The inclination angle toward the center is preferably set in the range of 3 degrees to 5 degrees.

  When the material to be pulverized (see FIG. 5), the gap between the upper surface 16 of the rotary table 14 and the pulverizing surface 26 of the pulverizing roller 22 is preferably in the range of 20 mm to 30 mm. Further, when the maximum diameter of the crushing roller 22 is 2000 mm, the distance between the ends on the center side of the turntable 14 of the inner ridge line portions 66 adjacent to each other on the outer peripheral surface 24 is preferably about 100 mm. The interval between the bent portions of the adjacent ridge line portions 64 is preferably about 150 mm. Further, the width of the ridge line portion 64 disposed on the outer peripheral surface 24 is preferably about 10 mm and the height is about 5 mm.

As shown in FIG. 5, the rotary shaft 28 is disposed so as to incline toward the center of the rotary table 14 even when the material to be crushed is pulverized. 14 does not pass through the center O of the upper surface 16. For this reason, in the crushing surface 26 of the crushing roller 22, there is only one area on the straight line 72 (FIG. 2) that rotates without sliding with the rotary table 14. Therefore, the shearing stress can be applied to the object to be crushed in most of the region sandwiched between the rotary table 14 and the pulverizing roller 22, and the object to be crushed can be ground.
In the present embodiment, the crushing roller 22 has a truncated cone shape in order to increase the above-described shear stress, but may have a cylindrical shape.

  In a vertical crusher in which the crushing roller disposed on the rotary table undulates with the position on the outer peripheral side of the rotary table as a fulcrum than the crushing roller, the material to be crushed is uniformly crushed on the outer peripheral surface of the crushing roller, Can be used as a vertical crusher that can reduce the burden on the crushing roller and can reduce the spilled material from between the rotary table and crushing roller during crushing and increase crushing efficiency. it can.

DESCRIPTION OF SYMBOLS 10 ......... Vertical crusher, 12 ......... casing, 14 ......... rotary table, 16 ...... top surface, 18 ...... electric motor, 20 ......... reduction gear, 22 ...... crushing roller, 24 ... ...... Outer peripheral surface, 26... Grinding surface, 28... Rotating shaft, 30... Upper arm, 32 ....... Lower arm, 34. …… Separator, 40 ……… Vane, 42 ……… Raw material inlet, 44 ……… Raw material chute, 46 ……… Dam ring, 48 ……… Annular passage, 50 ……… Gas inlet, 52… ...... Upper outlet, 54 ......... Lower outlet, 56 ......... Groove, 58 ......... Line, 60 ......... Inner groove, 62 ......... Outer groove, 64 ......... Ridge, 66 ... ... inner ridge line part, 68 ......... outer ridge line part, 70 ......... broken line, 72 ......... straight line, 74 .... extension line.

Claims (6)

A rotating table,
A crushing roller that is in rolling contact with the upper surface of the rotary table,
The crushing roller can be raised and lowered with a position on the outer peripheral side of the rotary table as a fulcrum with respect to the crushing roller, and a vertical crushing that crushes a material to be crushed between the rotary table and the crushing roller. Machine,
During pulverization of the object to be crushed,
The gap between the grinding roller and the rotary table, Ri Do constant in a direction toward the outer peripheral side from the center side of the rotary table,
On the outer peripheral surface of the grinding roller,
A ridge portion protruding from the outer peripheral surface is arranged,
The ridge portion is
The rotary table extends in a direction opposite to the rotation direction of the crushing roller from the center side toward the outer peripheral side, and has a shape that is bent and extended in the rotation direction of the crushing roller in the middle of the rotation table. Vertical crusher. The grinding roller is
While being urged in the direction of pressing the rotary table, at the initial position before biting the object to be crushed,
The vertical crusher according to claim 1, wherein a gap between the crushing roller and the rotary table is widened from the center side to the outer peripheral side of the rotary table.   The vertical crusher according to claim 2, wherein an inclination angle of a portion of the outer peripheral surface of the crushing roller facing the rotary table is in a range of 3 degrees to 5 degrees. Before Symbol ridge,
An inner ridge line portion extending from the bent position of the ridge line portion toward the center of the rotary table;
An outer ridge line portion extending from the bent position of the ridge line portion toward the outer peripheral side of the rotary table, and
On the outer peripheral surface, the end of the crushing roller on the center side of the rotary table and the end of the crushing roller on the outer peripheral side of the rotary table are connected at the shortest and the outer periphery of the rotary table at the outer ridge line portion. The angle formed between the straight line passing through the end on the side and the outer ridge line part is 40 degrees, and the angle formed between the straight line and the inner ridge line part is 10 degrees. Item 4. The vertical crusher according to any one of Items 1 to 3 . In the position facing the crushing roller on the upper surface of the rotary table,
A groove is arranged,
The groove is
2. The rotary table has a shape that extends while being inclined in the rotation direction of the rotary table from the center side toward the outer peripheral side, and is bent and extended in the rotation direction of the rotary table in the middle thereof. The vertical crusher of any one of thru | or 4 . The grinding roller is
The vertical crusher according to any one of claims 1 to 5 , wherein the vertical crusher has a truncated cone shape that decreases in diameter toward a center side of the rotary table.

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