JP6886403B2 - Roll crusher of cooler device - Google Patents

Description

The present invention relates to a roll crusher of a cooler device that cools while transporting a high temperature granular transported material, for example, a granular cement clinker.

The cement plant is provided with a cooler device for transporting the high-temperature cement clinker generated through preheating, calcining and firing in the transport direction while cooling. For example, there is a cooling device as in Patent Document 1. In this cooling device, the clinker is conveyed while being cooled by the cooling unit, and the clinker is discharged from the discharge end of the cooling unit. Further, the cooling device includes four rolls extending in the vicinity of the discharge end in a direction perpendicular to the transport direction. Of the four rolls, the three rolls located on the discharge end side rotate in the forward direction (that is, rotate so as to feed out in the transport direction). Further, the fourth reversing roll is designed to rotate in the reverse direction, and the lump clinker is sandwiched between the reversing roll and the roll adjacent thereto to compress and crush the lump clinker.

Japanese Unexamined Patent Publication No. 61-295264

Regarding the four rolls described in Patent Document 1, in order to further efficiently crush the clinker, it is conceivable to form a plurality of teeth on the outer peripheral surface of the four rolls, and the four rolls are discharged by rotating the rolls. The clinker ejected from the end is crushed by the teeth. In such a configuration, a load acts on the roll when crushing the clinker with teeth. If tooth crushing is performed at multiple locations on the roll at the same time, the load on the roll is maximized only at a specific time. Therefore, a rotating machine capable of rotating the roll even when a large load is generated, that is, a rotating unit such as an electric motor capable of generating a large driving force is required. A rotating unit capable of generating such a large driving force has a large external dimension and a large power consumption. Therefore, in order to reduce the size and power consumption of the rotating unit, it is desired to suppress the load of the roll from being maximized only at a specific time.

Therefore, an object of the present invention is to provide a roll crusher of a cooler device capable of leveling a change over time in a roll load.

The roll crusher of the cooler device of the present invention is a roll crusher for crushing the granular conveyed object in a cooler device that cools the granular conveyed object while conveying it, and is arranged side by side in the conveying direction with a gap between them. The rolls are provided with a plurality of rolls each rotated by a rotating unit around an axis orthogonal to the transport direction and parallel to each other to crush the granular transport, and at least one of the plurality of rolls reduces the load. A roll, the load-reducing roll has a plurality of crushing rings, each of the plurality of crushing rings having a plurality of crushing teeth arranged at equal intervals in the circumferential direction on the outer peripheral surface. At least one of the plurality of crushing rings is arranged so as to be displaced in the circumferential direction with respect to the plurality of crushing teeth of the adjacent crushing rings.

According to the present invention, a plurality of crushing teeth are arranged so as to be offset in the circumferential direction with respect to at least one crushing ring. Therefore, when the roll is rotated, it is possible to shift the timing at which the load increases with respect to the crushing load acting on the crushing rings arranged in a staggered manner and the other crushing rings. Thereby, the time-dependent change of the load acting on the load reduction roll can be leveled, and as a result, the time-dependent change of the load of the rotating unit can be leveled.

In the above invention, the plurality of crushing teeth are arranged on the outer peripheral surface of the crushing ring at a predetermined pitch with respect to the plurality of crushing teeth of the crushing ring adjacent to the axial direction in which the axis extends. It may be arranged so as to be deviated in one direction in the circumferential direction by 1 / n times (n: an integer of 2 or more) of the pitch.

According to the above configuration, the crushed teeth are arranged in the axial direction to form a dentition, and the dentition is formed so as to be twisted in one direction in the circumferential direction. As a result, when the load reduction roll is rotated, the granular conveyed material of the lump that cannot be crushed and remains on the roll can be sent in one of the axial directions. By feeding the granular transport of the mass in this way, the remaining granular transport of the mass can be collided with the granular transport of another mass and crushed. Further, by feeding the granular conveyed material, it is possible to guide the granular conveyed material remaining on the roll to a gap where it can be well bitten. As a result, even a granular transported object having a large particle size can be successfully bitten.

In the above invention, the load reducing roll has a shaft extending in the axial direction and being rotated around the axis by the rotating unit, and the shaft extends in the axial direction and has an outer peripheral surface thereof. The plurality of crushing rings have one of the engaging piece and the engaged groove on the inner peripheral surface, and the plurality of crushing rings have one of the engaging piece and the engaged groove. By engaging the engaging piece with the engaged groove, the shaft is externally mounted so as not to be relatively displaceable in the circumferential direction, and the plurality of crushing rings include a first crushing ring and a second crushing ring. The first crushing ring has a first reference tooth which is one of the plurality of crushing teeth, and the second crushing ring has a second reference tooth which is one of the plurality of crushing teeth. The first reference tooth is located on a line connecting the center of the first crushing ring and the center of any one of the engaging piece and the engaged groove, and the second reference tooth is the first reference tooth. It may be arranged so as to be offset by 360 / (n × N) (N: the number of teeth of the second crushing ring) in the circumferential direction with respect to one reference tooth.

According to the above configuration, when the second crushing ring is inverted, the crushing teeth are arranged with a deviation of 360 × (n-1) / (n × N) degrees from the crushing teeth of the first crushing ring ( That is, it can be used as a crushing ring in which the crushing teeth are displaced in one of the circumferential directions by (n-1) / n times the pitch). Therefore, the number of mold types for manufacturing the crushing ring can be reduced compared to the type of crushing ring used, and the manufacturing cost can be reduced.

In the above invention, the plurality of crushed teeth may include a high tooth which is a crushed tooth having a first height and a low tooth which is a crushed tooth having a second height lower than the first height.

According to the above configuration, by forming the low teeth, it is possible to pinch and crush a large lump of granular transported material that cannot be pinched by the high teeth. As a result, it is possible to prevent large lumps of granular transported material from remaining on the roll without being bitten.

In the above invention, on the outer peripheral surface of the load reducing roll, a high tooth forming portion in which a plurality of the high teeth are arranged in the circumferential direction and a low tooth forming portion in which the plurality of the low teeth are arranged in the circumferential direction are formed. The high tooth formation site and the low tooth formation site may be arranged in a staggered pattern.

According to the above configuration, the low teeth and the high teeth are alternately arranged in the axial direction between the rolls at the time of crushing, so that the change over time of the load acting on the load reduction roll can be leveled, and as a result, the rotating unit. It is possible to level the change of the load over time.

In the above invention, the load reducing roll has a shaft extending in the axial direction in which the axis extends and being rotated around the axis by the rotating unit, and the plurality of crushed teeth are predetermined. The teeth are arranged on the outer peripheral surface of the crushing ring at equal intervals at the same pitch, and are shifted in the circumferential direction by 1/2 times the pitch with respect to the plurality of crushing teeth of the crushing ring adjacent to the axial direction. The shaft has one of an engaging piece and an engaged groove extending in the axial direction and engaging with each other on the outer peripheral surface, and the plurality of crushing rings are the engaging piece. And one of the engaged grooves is provided on the inner peripheral surface, and by engaging the engaging piece with the engaged groove, the shaft is externally mounted so as not to be relatively displaceable in the circumferential direction, and the crushing is performed. On the outer peripheral surface of the ring, there are the high tooth forming portion in which at least two or more of the high teeth are lined up and the low tooth forming portion in which at least two or more of the low teeth are lined up. The first crushing ring includes one crushing ring and a second crushing ring, and the first crushing ring is one of the plurality of crushing teeth and has a center of the first crushing ring, the engaging piece, and the engaged groove. It has a first reference tooth located on a line connecting the centers of either of the other, and on the outer peripheral surface of the first crushing ring, the high tooth forming site and the high tooth forming site alternately in the circumferential direction with the first reference tooth as a reference. The low tooth forming site is arranged, and the second crushing ring is one of the plurality of crushed teeth and is 1/2 of the pitch in the circumferential direction with respect to the first reference tooth. It has a second reference tooth that is arranged so as to be doubled, and the high tooth formation site and the low tooth formation site are alternately arranged in the circumferential direction with the second reference tooth as a reference on the outer peripheral surface of the second crushing ring. The first crushing ring and the second crushing ring may be formed so as to have rotational symmetry around the respective axes.

According to the above configuration, the first crushing ring and the second crushing ring are externally attached to the shaft in a normal posture, and the first crushing ring and the second crushing ring are externally attached to the shaft in an inverted posture. By repeating the above steps, it is possible to manufacture a load reduction roll in which the crushed teeth are displaced by 1/2 times the pitch and the high tooth region and the low tooth region are arranged in a staggered pattern. Four types of crushing rings are used during manufacturing, but the number of types of molds for manufacturing crushing rings can be limited to two, and the manufacturing cost can be reduced.

In the above invention, the plurality of rolls have at least two adjacent load reduction rolls, and the adjacent load reduction rolls have different amounts of displacement of the plurality of crushed teeth in the circumferential direction. You may have each ring.

According to the above configuration, the time-dependent change of the load acting on the load reduction roll can be further leveled, and as a result, the time-dependent change of the load of the rotating unit can be further leveled.

According to the present invention, it is possible to level the change of the load of the roll with time.

It is the schematic which shows the structure of the cement plant provided with the cooler device which concerns on this invention. It is a perspective view which shows the outline of the structure of the cooler device of FIG. It is a perspective view which shows the roll crusher of the cooler device of FIG. It is a front view which shows the 1st crushing ring of the 1st roll of FIG. It is a front view which shows a part of the 1st crushing ring of the 1st roll of FIG. It is a front view which shows the 2nd crushing ring of the 1st roll of FIG. It is a front view which shows a part of the 2nd crushing ring of the 1st roll of FIG. It is an enlarged perspective view which shows the 1st roll of FIG. 3 partially enlarged. It is a front view which shows the 1st crushing ring of the 2nd roll of FIG. It is a front view which shows the 2nd crushing ring of the 2nd roll of FIG. It is a front view which shows a part of the 2nd crushing ring of the 2nd roll of FIG. It is an enlarged perspective view which shows the 2nd roll of FIG. 3 partially enlarged.

Hereinafter, the cooler device 1 according to the embodiment of the present invention will be described with reference to the drawings. The concept of the direction used in the following description is used for convenience in the explanation, and does not limit the direction of the configuration of the invention to that direction. Further, the cooler device 1 described below is only one embodiment of the present invention. Therefore, the present invention is not limited to the embodiment, and can be added, deleted, or changed without departing from the spirit of the invention.

[First Embodiment]
<Cement plant>
Cement is produced through a raw material crushing process for crushing cement raw materials containing limestone, clay, silicate, iron, etc., a firing step for firing the crushed cement raw material, and a finishing process which is the final step. Three steps are carried out in the cement plant. In the firing step, which is one of these three steps, the crushed cement raw material is fired and cooled to produce granular cement clinker. The configuration shown in FIG. 1 shows the firing equipment 3 of the cement plant, and is a portion where the firing step in cement production is performed. The firing facility 3 preheats, calcins, and fires the cement raw material crushed in the raw material crushing step, and cools the granular cement clinker that has been fired to a high temperature.

Explaining the portion where the firing step is performed in more detail, the firing equipment 3 includes a preheater 4, and the preheater 4 is composed of a plurality of cyclones 5. The cyclones 5 are provided in a stepped manner arranged in the vertical direction, and the exhaust gas in the cyclone 5 is blown up to the upper cyclone 5 (see the arrow in the broken line in FIG. 1), the cement raw material charged is separated by a swirling flow, and the lower stage. It is designed to be put into the cyclone 5 of (see the solid line arrow in FIG. 1). The cyclone 5, which is located one step above the bottom, is designed to put the cement raw material into the calcining furnace 6. The calcining furnace 6 has a burner, and a reaction (that is, a calcining reaction) for separating carbon dioxide gas in the cement raw material input by the heat generated by the burner and the heat of the exhaust gas described later is performed. The cement raw material in which the calcining reaction is promoted in the calcining furnace 6 is guided to the lowermost cyclone 5 as described later, and the cement raw material in the cyclone 5 is further supplied to the rotary kiln 7. There is.

The rotary kiln 7 is formed in a horizontally long cylindrical shape of several tens of meters or more. The rotary kiln 7 is arranged so as to be slightly inclined downward from the entrance on the cyclone 5 side toward the exit on the tip side. Therefore, by rotating the rotary kiln 7 around the axis, the cement raw material on the inlet side is conveyed to the outlet side. A combustion device 8 is provided at the outlet of the rotary kiln 7. The combustion device 8 forms a high-temperature flame and fires the cement raw material.

Further, the combustion device 8 injects high-temperature combustion gas toward the inlet side, and the combustion gas injected from the combustion device 8 flows toward the inlet in the rotary kiln 7 while firing the cement raw material. The combustion gas becomes a jet from the lower end of the calcining furnace 6 as high-temperature exhaust gas and blows upward in the calcining furnace 6 (see the dashed arrow in FIG. 1), and the cement raw material put into the calcining furnace 6 is charged. Is designed to blow up. The cement raw material is heated to about 900 ° C. by this exhaust and burner, that is, it is calcined. Further, the blown-up cement raw material flows into the lowermost cyclone 5 together with the exhaust gas, and the exhaust gas flowing in here and the cement raw material are separated. The separated cement raw material is supplied to the rotary kiln 7, and the exhaust gas is blown up to the cyclone 5 one step higher. The blown-out exhaust heats the cement raw material by exchanging heat with the cement raw material put into each cyclone 5, and is separated from the cement raw material again. The separated exhaust gas further rises to the cyclone 5 above it and repeats heat exchange. Then, it is discharged to the atmosphere from the uppermost cyclone 5.

In the firing facility 3 configured in this way, the cement raw material is input from the vicinity of the cyclone 5 at the top stage, is sufficiently preheated while exchanging heat with the exhaust gas, descends to the cyclone 5 one stage above the bottom stage, and is calcined. It is thrown into 6. In the calcining furnace 6, the cement raw material is calcined by a burner and a high-temperature gas, and then the cement raw material is guided to the lowermost cyclone 5 where it is separated from the exhaust gas and supplied to the rotary kiln 7. The supplied cement raw material is transported to the outlet side while being fired in the rotary kiln 7. Cement clinker is formed by preheating, calcining, and firing in this way. A cooler device 1 is provided at the outlet of the rotary kiln 7, and the cement clinker formed from the outlet of the rotary kiln 7 is discharged to the cooler device 1.

<Cooler device>
The cooler device 1 cools the cement clinker (high-temperature granular transport) discharged from the rotary kiln 7 while transporting it in a predetermined transport direction, and has a fixed inclination just below the outlet of the rotary kiln 7. Great 11 is placed. The fixed inclined grate 11 is inclined downward from the outlet side of the rotary kiln 7 toward the transport direction, and the granular cement clinker discharged from the outlet of the rotary kiln 7 rolls on the fixed inclined grate 11 in the transport direction. It is supposed to fall to. A plurality of cooling grid rows 13 are provided at the tip of the fixed inclined grate 11 in the transport direction, and cement clinker is deposited on the plurality of cooling grid rows 13 to form the clinker layer 14. The cooling grid rows 13 are structures extending in the transport direction, and are arranged side by side in the lateral direction (hereinafter, also referred to as “orthogonal direction”) orthogonal to the transport direction so as to be adjacent to each other, and a plurality of cooling grids are arranged. A clinker layer 14 (see the two-point chain line in FIG. 2) rests on it so as to cover all of the row 13.

The cooling grid row 13 configured in this way has a carriage (not shown) and is moved to one side and the other side in the transport direction, so that the cooling grid row 13 is moved and the cooling grid row 13 is stopped. By repeating and, the granular cement clinker is transported. Specific transport methods include, for example, a method of advancing all the cooling grid rows 13 arranged in the orthogonal direction and then retracting the non-adjacent cooling grid rows 13 in a plurality of times, or a crossbar extending in the orthogonal direction. Is provided on the upper part of the cooling grid row 13, and the crossbar is moved in the transport direction to feed the clinker layer 14 in the transport direction. The configuration and method for feeding the clinker layer 14 in the transport direction is not limited to the configuration and method described above, and any configuration and method that can feed the clinker layer 14 in the transport direction may be used. The cement clinker conveyed in this way falls downward from the tip of the cooling grid row 13, and the roll crusher 15 is arranged directly below the tip of the cooling grid row 13.

As shown in FIG. 3, the roll crusher 15 is a device for further finely crushing the cement clinker falling from the tip of the cooling grid row 13. The roll crusher 15 is composed of four load reducing rolls (hereinafter, simply referred to as “rolls”) 15a to 15d. The four rolls 15a to 15d are columnar rod-shaped bodies extending in the orthogonal direction, and are pivotally supported by a bearing mechanism (not shown) so as to rotate around the rotation axes L1 to L4, which are the central axes of the four rolls 15a to 15d. The four rolls 15a to 15d are arranged so that their rotation axes L1 to L4 are parallel to each other and arranged side by side in the transport direction at predetermined intervals, and each of the four rolls 15a to 15d has a separate rotation. A unit 17 is provided. The rotating unit 17 is a so-called electric motor, and the rolls 15a to 15d are rotated in the forward direction and the reverse direction in response to a command input thereto. Further, a control device 18 is connected to the rotating unit 17, and the control device 18 rotates four rolls 15a to 15d by controlling the movement of the rotating unit 17 to crush the massive cement clinker. It has become like. Hereinafter, the four rolls 15a to 15d will be described in detail.

The four rolls 15a to 15d are composed of two types of rolls. Specifically, the first and third rolls from the downstream side from the transport direction are composed of the first type rolls, and the second and fourth types are composed of the second type rolls. Hereinafter, the configuration of the first roll 15a, which is the first roll as the first type roll, will be described with reference to FIGS. 4 to 8, and then the configuration of the second roll 15b, which is the second roll, will be described in FIG. This will be described with reference to 12 to 12. Since the configurations of the third roll 15c, which is the third roll, and the fourth roll 15d, which is the fourth roll, are the same as the configurations of the first roll 15a and the second roll 15b, the same reference numerals are given. The description will be omitted.

The first roll 15a has a first shaft 21 and a plurality of crushing rings 22, 23. The first shaft 21 is a roughly columnar member extending in the orthogonal direction, and the vicinity of both ends thereof is rotatably supported around the rotation shaft L1 by a bearing mechanism (not shown). Further, one end of the first shaft 21 is connected to the rotating unit 17, and is driven to rotate around the rotating shaft L1 by the rotating unit 17. Further, two keys 21a are formed on the outer peripheral surface of the first shaft 21. The two keys 21a, which are engaging pieces, project outward in the radial direction and extend from one end to the other end of the first shaft 21, and are arranged 180 degrees apart in the circumferential direction. A plurality of two types of crushing rings 22 and 23 are alternately exteriorized on the outer peripheral surface of the first shaft 21 having such a shape. Hereinafter, the configurations of the first crushing ring 22 and the second crushing ring 23, which are two types of crushing rings 22 and 23, will be described.

The first crushing ring 22 shown in FIG. 4 is a substantially cylindrical member extending in the orthogonal direction, and has two key grooves 22a on its inner peripheral surface. The key groove 22a, which is an engaged groove, has the same shape as the key 21a of the first shaft 21, and extends from one end to the other end of the first crushing ring 22. Further, the key grooves 22a are arranged 180 degrees apart in the circumferential direction, so that the key 21a fits into the key groove 22a when the first crushing ring 22 is mounted on the first shaft 21. As a result, the first crushing ring 22 is outer so as not to rotate relative to the first shaft 21. Further, a plurality of crushing teeth 24 are formed on the outer peripheral surface of the first crushing ring 22. In the present embodiment, 18 crushing teeth 24 are formed on the outer peripheral surface of the first crushing ring 22, and 18 crushing teeth 24 are arranged at an equal pitch p1. Each crushing tooth 24 projects outward in the radial direction and extends from one end to the other end in the orthogonal direction of the first crushing ring 22. Further, the plurality of crushed teeth 24 include crushed teeth 24 having different tooth depths, and in the present embodiment, 6 high teeth 24a, 4 middle teeth 24b, and 8 low teeth 24c 3 Includes different types of teeth.

The high tooth 24a is the tooth having the largest tooth depth among the three types of teeth. One of the six high teeth 24a is located on the virtual central surface PL11 including the central axis of the first crushing ring 22 (that is, the rotation axis L1) and the center of one keyway 22a. .. The high teeth 24a serve as the first reference tooth, and two high teeth 24a are arranged on one side in the circumferential direction with reference to the first reference tooth 24d in FIG. 4 on the outer peripheral surface of the first crushing ring 22. Next, the middle tooth 24b is arranged. The middle tooth 24b is a tooth lower than the high tooth 24a and higher than the low tooth 24c, that is, has an intermediate tooth gap between the high tooth 24a and the low tooth 24c. Further, four low teeth 24c are arranged side by side at an equal pitch p1 next to one of the middle teeth 24b in the circumferential direction. The low tooth 24c is the tooth with the smallest tooth depth among the three types of teeth. Next to one of the four low teeth 24c in the circumferential direction, the middle tooth 24b is arranged again, and then the high tooth 24a is arranged. The high teeth 24a are located on the virtual central surface PL11, and following the high teeth 24a, two high teeth 24a are arranged side by side at an equal pitch p1 on one side in the circumferential direction. Further, the middle teeth 24b, the four low teeth 24c, and the middle teeth 24b are arranged in the order of equal pitch p1.

In the first crushing ring 22 configured in this way, three high teeth 24a are arranged side by side on the outer peripheral surface, and the three high teeth 24a arranged side by side are arranged on the outer peripheral surface of the first high tooth forming portion 25 (for example, which will be described later). The shaded portion of the first roll 15a in FIG. 8) is configured respectively. Further, between the two first high tooth forming sites 25, four low teeth 24c are arranged side by side on one side and the other side in the circumferential direction, and the four low teeth 24c arranged side by side form the first low tooth. Each part 26 is composed of each part. As a result, the first high tooth forming portion 25 and the first low tooth forming portion 26 are alternately arranged in this order on one of the circumferential directions on the outer peripheral surface of the first crushing ring 22. The first crushing ring 22 having such a shape can be exteriorized on the first shaft 21 in a normal posture in which the high tooth 24a adjacent to the first reference tooth 24d is located on one side in the circumferential direction with respect to the first reference tooth 24d. it can.

Further, since the first crushing ring 22 has rotational symmetry about the central axis and the key groove 22a is arranged at a position shifted by 180 degrees, the first crushing ring 22 is arranged with respect to the virtual central surface PL11. The first shaft 21 can be exteriorized in an inverted posture in which one side and the other side are inverted. In the inverted posture, the position of the first reference tooth 24d in the circumferential direction does not change as shown in FIG. 5, but the two high teeth 24a are arranged so as to line up on the other side of the first reference tooth 24d in the circumferential direction. As a result, the first crushing ring 22 is inverted left and right with respect to the virtual central surface PL11, so that the first high tooth forming portion 25 and the first low tooth forming portion 26 are formed on the outer peripheral surface with reference to the first reference tooth 24d. In that order, they can be arranged alternately in the other direction in the circumferential direction.

The second crushing ring 23 shown in FIG. 6 is a substantially cylindrical member extending in the orthogonal direction, and has substantially the same configuration as the first crushing ring 22. That is, the second crushing ring 23 has two key grooves 23a which are engaged grooves on the inner peripheral surface thereof, and has a plurality of crushing teeth 27 on the outer peripheral surface thereof. Like the plurality of crushed teeth 24 of the first crushing ring 22, the plurality of crushed teeth 27 include crushed teeth 27 having different tooth depths, and in the present embodiment, the six high teeth 27a and four of the four crushed teeth 27. Includes three different types of tooth teeth, a tooth 27b and eight low teeth 27c. Further, each of the plurality of crushing teeth 27 is also arranged in the same arrangement as the plurality of crushing teeth 24 of the first crushing ring 22, and two heights in one of the circumferential directions from the second reference tooth 27e corresponding to the first reference tooth 24d. Teeth 27a, middle teeth 27b, four low teeth 27c, middle teeth 27b, three high teeth 27a, middle teeth 27b, four low teeth 27c, and middle teeth 27b are arranged on the outer peripheral surface of the second crushing ring 23 in this order. I'm out. The difference between the first crushing ring 22 and the second crushing ring 23 is that in the second crushing ring 23, the second reference is on the virtual central surface PL12 including the central axis of the second crushing ring 23 and the center of the keyway 23a. The tooth bottom 27d formed between the tooth 27e and the middle tooth 27b is located, and the second reference tooth 27e is arranged with a deviation of 1/2 times the pitch p1 with respect to the virtual center surface. That is, the entire plurality of crushing teeth 27 are arranged with respect to the plurality of crushing teeth 24 of the first crushing ring 22 on the rotation axis L1 with a deviation of 1/2 times the pitch p1.

In the second crushing ring 23 formed in this way, the second high tooth forming site 28 is formed by the three high teeth 27a arranged side by side, and the four high tooth forming sites 28 are arranged side by side, similarly to the first crushing ring 22. The low tooth 27c constitutes the second low tooth forming site 29. That is, on the outer peripheral surface of the second crushing ring 23, the second high tooth forming portion 28 and the second low tooth forming portion 29 are alternately arranged on one side in the circumferential direction with respect to the second reference tooth 27e. ing. The second crushing ring 23 having such a shape is mounted on the first shaft 21 in a normal posture in which the high teeth 27a adjacent to the second reference tooth 27e are located on one side in the circumferential direction with respect to the second reference tooth 27e. be able to.

Further, since the second crushing ring 23 has rotational symmetry about the central axis and the key groove 23a is arranged at a position shifted by 180 degrees like the first crushing ring 22, the virtual central surface PL12 On the other hand, the first shaft 21 can be exteriorized in an inverted posture in which one side and the other side of the second crushing ring 23 are inverted. In the inverted posture, as shown in FIG. 7, the second reference tooth 27e is arranged at a position inverted with respect to the virtual central surface PL12, and the two high teeth 27a are arranged on the opposite side in the circumferential direction of the second reference tooth 27e. Can be arranged as follows. By inverting the second crushing ring 23 with respect to the virtual central surface PL12 in this way, the second high tooth forming portion 28 and the second low tooth forming portion 29 are arranged in that order on the outer peripheral surface with respect to the second reference tooth 27e. Can be staggered on the other side in the circumferential direction.

Each of the two types of crushing rings 22 and 23 configured in this way is externally attached to the first shaft 21 while alternately changing the normal posture and the inverted posture. That is, as shown in FIG. 8, a plurality of crushing rings 22 and 23 are externally attached to the first shaft 21. The first crushing ring 22 is exteriorized in the normal posture on the farthest end side of the first shaft 21, and the second crushing ring 23 is exteriorized in the regular posture so as to be adjacent thereto. As a result, in the second crushing ring 23T in the normal posture, the second reference tooth 27e is arranged with a half pitch p1/2 offset from the first reference tooth 24d in the first crushing ring 22T in the normal posture. That is, the second crushing ring 23T is exteriorized on the first shaft 21 in a state where the entire plurality of crushing teeth 27 are deviated by half a pitch p1/2 with respect to the entire plurality of crushing teeth 24 of the first crushing ring 22. In the two crushing rings 22T and 23T that are exteriorized in this way, the first high tooth forming portion 25 and the second high tooth forming portion 28 are basically arranged on one side in the circumferential direction from the virtual central surfaces PL11 and PL12. There is.

Further, on the first shaft 21, the first crushing ring 22 is mounted in an inverted posture adjacent to these two crushing rings 22T and 23T, and the second crushing ring 23 is exteriorized in an inverted posture so as to be adjacent to the first crushing ring 22. ing. In the two crushing rings 22R and 23R that are exteriorized in the inverted posture in this way, the first high tooth forming portion 25 and the second high tooth forming portion 28 are basically arranged on the opposite side in the circumferential direction from the virtual central surfaces PL11 and PL12. Has been done. That is, the first high tooth formation site 25 and the second high tooth formation site 28 of the two crushing rings 22R and 23R in the inverted posture, and the first high tooth formation site 25 and the second height of the crushing rings 22T and 23T in the normal posture. The tooth forming site 28 is located on the opposite side of the virtual central surfaces PL11 and PL12, respectively.

Further, on the first shaft 21, two crushing rings 22T and 23T in a normal posture are mounted in this order adjacent to the two crushing rings 22R and 23R in the inverted posture, and two crushing rings 22T and 23T in the inverted posture are adjacent to the first shaft 21. The crushing rings 22R and 23R are exteriorized in that order. In this way, the first roll 15a is configured by exteriorizing the plurality of crushing rings 22T, 22R, 23T, 23R on the first shaft 21.

On the outer peripheral surface of the first roll 15a configured in this way, the high tooth formation site 30H is formed by the adjacent first high tooth formation site 25 and the second high tooth formation site 28, and the adjacent first low tooth is formed. The low tooth formation site 30L is formed by the formation site 26 and the second low tooth formation site 29. The high tooth formation site 30H and the low tooth formation site 30L are alternately arranged on one side and the other side of the virtual central surfaces PL11 and PL12 in the orthogonal direction. As a result, the high tooth forming portion 30H and the low tooth forming portion 30L are arranged in a staggered manner on the outer peripheral surface of the first roll 15a. Further, on the first roll 15a, the second roll 15b is arranged so as to be adjacent to the first roll 15a in the transport direction at a predetermined interval.

The second roll 15b has a second shaft 31 and a plurality of crushing rings 32 and 33. The second shaft 31 has the same shape as the first shaft 21. That is, the second shaft 31 is a cylindrical member extending in the orthogonal direction, and the vicinity of both ends thereof is rotatably supported around the rotation axis L2 by a bearing mechanism (not shown). Further, one end of the second shaft 31 is connected to a rotating unit 17, and the rotating unit 17 is rotationally driven around the rotating shaft L2. Further, two keys 31a (engagement pieces) arranged 180 degrees apart in the circumferential direction are formed on the outer peripheral surface of the second shaft 31. A plurality of two types of crushing rings 32 and 33 are exteriorized on the outer peripheral surface of the second shaft 31 having such a shape.

The first crushing ring 32 shown in FIG. 9 is a substantially cylindrical member extending in the orthogonal direction, and has two key grooves 32a on its inner peripheral surface. The key groove 32a, which is the engaged groove, has the same shape as the key 31a of the second shaft 31, and extends from one end to the other end of the first crushing ring 32. Further, the key grooves 32a are arranged 180 degrees apart in the circumferential direction, so that the key 31a fits into the key groove 32a when the first crushing ring 32 is attached to the second shaft 31. As a result, the first crushing ring 32 is outer so as not to rotate relative to the second shaft 31. Further, a plurality of crushing teeth 34 are formed on the outer peripheral surface of the first crushing ring 32. In the present embodiment, 18 crushing teeth 34 are formed on the outer peripheral surface of the first crushing ring 32, and the 18 crushing teeth 34 are arranged at an equal pitch p2. Each crushing tooth 34 protrudes outward in the radial direction and extends from one end to the other end of the first crushing ring 32. Further, each crushed tooth 34 is formed on the outer peripheral surface of the first crushed ring 32 so that the tooth depth is the same.

More specifically, the first reference tooth 34a, which is one of the plurality of crushing teeth 34, has a central axis of the first crushing ring 32 (that is, a rotation axis L2) and a center of one key groove 32a. It is located on the virtual central surface PL21 including the other crushing teeth 34, and is arranged on the outer peripheral surface of the first crushing ring 32 by arranging the other crushing teeth 34 at equal pitch p2 with reference to the first reference tooth 34a. The first crushing ring 32 configured in this way is formed so as to have rotational symmetry about its central axis. The first crushing ring 32 is exteriorized on the second shaft 31 so that the first reference tooth 34a is located on an extension line outward in the radial direction of one key 31a of the second shaft 31.

The second crushing ring 33 shown in FIG. 10 is a substantially cylindrical member extending in the orthogonal direction, and has substantially the same configuration as the first crushing ring 32. That is, the second crushing ring 33 has two key grooves 33a (engaged grooves) on its inner peripheral surface and a plurality of crushing teeth 35 on its outer peripheral surface. The plurality of crushing teeth 35 are formed on the outer peripheral surface of the second crushing ring 33 so as to have the same tooth depth as the first crushing ring 32. In the present embodiment, 18 crushing teeth 35 are formed on the outer peripheral surface of the second crushing ring 33, and the 18 crushing teeth 35 are arranged at an equal pitch p2. Further, the second crushing ring 33 is one of the plurality of crushed teeth 35 and has a second reference tooth 35a corresponding to the first reference tooth 34a, and the second reference tooth 35a is the second. It is arranged so as to be offset by 1/3 times the pitch p2 with respect to the virtual central surface PL22 including the central axis of the crushing ring 33 (that is, the rotation axis L2) and the center of one key groove 33a. That is, the entire plurality of teeth of the second crushing ring 33 are arranged around the rotation axis L2 with a deviation of 1/3 times the pitch p2 with respect to the plurality of crushing teeth 34 of the first crushing ring 32. The second crushing ring 33 having such a shape can be externally attached to the second shaft 31 in a normal posture in which the second reference tooth 35a is located on one side in the circumferential direction with respect to the virtual central surface PL22.

Further, since the second crushing ring 33 has rotational symmetry about its central axis and the key groove 33a is arranged at a position shifted by 180 degrees, the second crushing ring 33 has a second crushing ring with respect to the virtual central surface PL22. The second shaft 31 can be exteriorized in an inverted posture in which one side and the other side of the 33 are inverted. As a result, as shown in FIG. 11, the second reference tooth 35a can be arranged at a position inverted with respect to the virtual central surface PL22, and the second reference tooth 35a is located on the other side in the circumferential direction with respect to the virtual central surface PL22. It is arranged so as to be offset by 1/3 of the pitch p2. That is, the entire plurality of crushing teeth 35 of the second crushing ring 33 are arranged around the rotation axis L2 with a deviation of 2/3 times the pitch p2 with respect to the plurality of crushing teeth 34 of the first crushing ring 32. By reversing the second crushing ring 33 with respect to the virtual central surface PL22 in this way, the entire plurality of crushing teeth 35 have a pitch p2 around the rotation axis L2 with respect to the plurality of crushing teeth 34 of the first crushing ring 32. The second crushing ring 33 can be offset by 2/3 times.

In each of the two types of crushing rings 32 and 33 configured in this way, the crushing teeth 34 and 35 formed on the crushing rings 32 and 33 are arranged so as to be offset by 1/3 times the pitch p2. It is exteriorized on the second shaft 31. That is, as shown in FIG. 12, a plurality of crushing rings 32 and 33 are externally attached to the second shaft 31. A first crushing ring 32 is exteriorized on the farthest end side of the second shaft 31, and the first reference tooth 34a is located on the outer side of the key 31a of the second shaft 31 in the radial direction.

Further, the second crushing ring 33 is externally attached to the second shaft 31 in a normal posture so as to be adjacent to the first crushing ring 32. In the second crushing ring 33T in the normal posture, the second reference tooth 35a is arranged so as to be offset from the first reference tooth 34a of the first crushing ring 32 in the circumferential direction by 1/3 times the pitch p2. That is, the second crushing ring 33T is exteriorized on the second shaft 31 in a state where the entire plurality of crushing teeth 35 are displaced by 1/3 times the pitch p2 with respect to the entire crushing teeth 34 of the first crushing ring 32. Further, next to the second crushing ring 33T in the normal posture, the second crushing ring 33 is exteriorized on the second shaft 31 in the inverted posture. In the second crushing ring 33R in the inverted posture, the second reference tooth 35a is arranged so as to be offset from the first reference tooth 34a of the first crushing ring 32 in the circumferential direction by 1/3 times the pitch p2. That is, the second crushing ring 33R is exteriorized on the second shaft 31 in a state where the entire plurality of crushing teeth 35 are displaced by 2/3 times the pitch p2 with respect to the entire crushing teeth 34 of the first crushing ring 32. Further, next to the second crushing ring 33R in the inverted posture, the first crushing ring 32, the second crushing ring 33T in the normal posture, and the second crushing ring 33R in the inverted posture are repeatedly exteriorized in that order. The second roll 15b is configured by externally mounting the plurality of crushing rings 32, 33T, 33R on the second shaft 31 in this way.

On the outer peripheral surface of the second roll 15b configured in this way, a dentition 36 is formed by crushed teeth 34 and 35 adjacent to each other in the axial direction, that is, in the orthogonal direction. Since the adjacent crushed teeth 34 are arranged so as to be offset by 1/3 times the pitch p2, the dentition 36 extends in the orthogonal direction so as to be twisted in one of the circumferential directions on the outer peripheral surface of the second roll 15b. (For example, as one dentition 36, see the shaded portion of the second roll 15b in FIGS. 3 and 12). The first roll 15a arranged adjacent to the second roll 15b is also adjacent to the axial direction, that is, in the orthogonal direction, and is arranged with a half pitch p1 / 2 offset from the other in the circumferential direction 24, 27. The dentition is formed by the above, and the dentition extends in the orthogonal direction on the outer peripheral surface of the first roll 15a so as to be twisted in the other direction in the circumferential direction.

As described above, the third roll 15c is configured in the same manner as the first roll 15a, and the fourth roll 15d is configured in the same manner as the second roll 15b.

The four rolls 15a to 15d configured in this way are arranged at predetermined intervals in the transport direction as described above, and there are gaps S1 to S3 between the adjacent rolls 15a to 15d. The width of the gaps S1 to S3 (that is, the length in the transport direction) is such that the rolls 15a to 15d rotate and the crushing teeth 24, 27, 34, 35 are formed on the outer peripheral surfaces of the rolls 15a to 15d. It changes according to the position of each of the crushed teeth 24, 27, 34, 35. That is, the width of the gaps S1 to S3 is the narrowest (minimum width) when the high teeth 24a and 27a and the crushed teeth 34 and 35 are abutted, and the width of the gaps S1 to S3 is the widest when the tooth bases face each other (the width of the gaps S1 to S3 is the widest). Maximum width). By narrowing the widths of the gaps S1 to S3, the particle size of the cement clinker after crushing can be reduced, but the load acting on the rolls 15a to 15d at the time of crushing becomes large. Further, when the widths of the gaps S1 to S3 are widened, the load at the time of crushing is reduced, but the cement clinker having a large particle size is discharged downward. Based on this, the minimum width of the gaps S1 to S3 is set according to the allowable amount of the load acting on the rolls 15a to 15d at the time of crushing, and the maximum width of the gaps S1 to S3 is the allowable particle size of the cement clinker. It is set according to. Further, the intervals between the adjacent rolls 15a to 15d and the tooth depths of the crushed teeth 24, 27, 34, and 35 are set according to the minimum width and the maximum width.

The four rolls 15a to 15d configured in this way are rotationally driven by their respective rotating units 17. For example, in the control device 18, a normal mode and a high crushing mode can be selected. In the normal mode, the first roll 15a rotates in the other direction in the circumferential direction, the second to fourth rolls 15b to 15d rotate in one direction in the circumferential direction, and in the high crushing mode, the first roll 15a and the third roll 15c rotate. The second and fourth rolls 15b and 15d rotate in the other direction in the circumferential direction, and the second and fourth rolls 15b and 15d rotate in the other direction in the circumferential direction. The four rolls 15a to 15d that rotate in this way receive the cement clinker that falls from the tip of the cooler device 1, and crush the received cement clinker to a particle size equal to or less than the allowable particle size.

More specifically, in the normal mode, in the second to fourth rolls 15b to 15d, the falling cement clinker is sent toward the first roll 15a. At that time, in the second to fourth rolls 15b to 15d, cement clinker having a particle size smaller than the allowable particle size is dropped from the gaps S2 and S3, and a large lump of cement clinker having a large particle size moves toward the first roll 15a. Is sent. The first roll 15a is rotated together with the second roll 15b so as to involve the cement clinker on the first and second rolls 15a and 15b between them (that is, the gap S1), and the cement clinker is placed between them. It is designed to be crushed by getting caught in. By crushing, a large lump of cement clinker becomes a cement clinker having a particle size equal to or less than the allowable particle size and falls downward from the gap S1.

On the other hand, in the high crushing mode, the third roll 15c also rotates together with the fourth roll 15d so as to involve the cement clinker on the third and fourth rolls 15c, 15d between them (that is, the gap S3). Cement clinker is crushed by getting caught between them. In this way, the roll crusher 15 is crushed at two places, and more cement clinker can be crushed and dropped downward.

In the first roll 15a and the third roll 15c of the roll crusher 15 configured in this way, the load acting on the crushing rings 22T, 22R, 23T, 23R during rotation crushes the cement clinker by the crushing teeth 24, 27. The load increases at other times, and the load acting at other times decreases. In the first roll 15a and the third roll 15c, the adjacent crushing teeth 24 and 27 are arranged so as to be deviated from each other by a half pitch p1 / 2 in the circumferential direction. It is possible to make different timings when the load acting on the teeth increases. That is, the timing at which the load acts on each of the crushing rings 22T, 22R, 23T, and 23R during rotation can be shifted from each other. Thereby, the time-dependent change of the load acting on the first roll 15a and the third roll 15c can be leveled, and as a result, the time-dependent change of the load of the rotating unit 17 can be leveled.

Further, in the first roll 15a and the third roll 13c, the crushing rings 22 and 23 have different crushed teeth 24a to 24c and 27a to 27c. That is, not only the high teeth 24a and 27a but also the low teeth 24c and 27c are formed on the crushing rings 22 and 23. As a result, a large lump of cement clinker that cannot be crushed without being pinched by the high teeth 24a and 27a can be crushed by being sandwiched between the low teeth 24c and 27c. As a result, it is possible to prevent a large lump of cement clinker from remaining on the first roll 15a and the third roll 15c without being bitten.

Further, in the first roll 15a and the third roll 15c, the load acting on the crushing rings 22 and 23 peaks when the cement clinker is crushed by the high teeth 24a and 27a of the high tooth forming site 30H. Since the high tooth forming portion 30H and the low tooth forming portion 30L are arranged in a staggered pattern on the outer peripheral surfaces of the first roll 15a and the third roll 15c, the high teeth 24a and 27a of the first roll 15a and the third roll 15c are orthogonal to each other. It is possible to prevent them from lining up adjacent to each other in the direction. Thereby, the time-dependent change of the load acting on the first roll 15a and the third roll 15c can be leveled, and as a result, the time-dependent change of the load of the rotating unit 17 can be leveled.

Further, in the first roll 15a and the third roll 15c, the first crushing ring 22 and the second crushing ring 23 are externally attached to the first shaft 21 in a normal posture, and the first crushing ring 22 and the second crushing ring 23 are next to each other. Is mounted on the first shaft 21 in an inverted posture, and is manufactured by repeating this process. Therefore, the first roll 15a and the third roll 15c can be manufactured by two types of crushing rings 22 and 23. Therefore, although four types of crushing rings 22T, 22R, 23T, and 23R are used, the number of types of molds used for manufacturing them can be limited to two, and the manufacturing cost can be reduced.

Further, also in the second roll 15b and the fourth roll 15d, the adjacent crushing teeth 34 and 35 are arranged so as to be displaced from each other by 1/3 times the pitch p2 in the circumferential direction. The timing at which the load acting on the 33R increases can be made different. That is, the timing at which the load acts on each of the crushing rings 32, 33T, and 33R during rotation can be shifted from each other. Thereby, the time-dependent change of the load acting on the second roll 15b and the fourth roll 15d can be leveled, thereby leveling the time-dependent change of the load of the rotating unit 17.

Further, in the second roll 15b and the fourth roll 15d, the dentition 36 extends in the orthogonal direction so as to be twisted in one of the circumferential directions on the outer peripheral surface thereof (shading of the second roll 15b in FIGS. 3 and 12). See part). Therefore, when the second roll 15b and the fourth roll 15d are rotated respectively, the large lump cement clinker remaining on the rolls 15b and 15d without falling from the gaps S1 to S3 is placed on one side in the orthogonal direction (for example, the second roll). It can be sent to the other end side of the shaft 31). By sending the cement clinker in this way, it is possible to collide with another lump of cement clinker and crush the lump of cement clinker. Further, by sending the cement clinker, it is possible to guide the lumps of cement clinker remaining on the rolls 15b and 15d to the gaps S1 to S3 where the lumps of cement clinker can be bitten well, and even a large lump of cement clinker can be bitten well. be able to.

Also in the first roll 15a, the crushed teeth 24 and 27 adjacent to each other in the orthogonal direction are arranged with a half pitch p1 / 2 offset from the other in the circumferential direction, and the dentition is formed by the displaced crushed teeth 24 and 27. Tooth. This dentition extends in the orthogonal direction on the outer peripheral surface of the first roll 15a so as to be twisted in the other direction in the circumferential direction. Therefore, by rotating the first roll 15a in the other direction in the circumferential direction, this dentition can send a large mass of cement clinker remaining on the roll 15a to one side in the orthogonal direction, and the second and fourth rolls 15b. , 15d has the same effect as the dentition 36.

Further, in the second and fourth rolls 15b and 15d, the first crushing ring 32 is attached to the second shaft 31, and the second crushing ring 33T in the normal posture and the second crushing ring 33R in the inverted posture are placed next to the first crushing ring 32 in that order. It is manufactured by exteriorizing the second shaft 31 and repeating the process. Therefore, the second roll 15b and the fourth roll 15d can be manufactured by two types of crushing rings 32 and 33. Therefore, although three types of crushing rings 32, 33T, and 33R are used, the number of types of molds for manufacturing them can be suppressed to two, and the manufacturing cost can be reduced.

Further, in the roll crusher 15 of the cooler device 1, the first to fourth rolls 15a to 15d are arranged side by side in this order, and the adjacent rolls 15a to 15d are arranged so as to be different types of rolls. By doing so, it is possible to diversify the parts to be abutted in the gaps S1 to S3 during rotation. For example, the high tooth 24a and the tooth bottom, the low tooth 24c and the crushed tooth 34, and the low tooth 24c and the tooth bottom can be butted. As a result, the time-dependent change in the magnitude of the load acting on the crushing rings 22, 23, 32, 33 can be further leveled, whereby the time-dependent change in the load of the rotating unit 17 can be leveled.

<Other Embodiments>
In the cooler device 1 of the present embodiment, four rolls 15a to 15d are arranged so that adjacent rolls 15a to 15d are different types of rolls, but the same rolls may be used for all of them. For example, rolls having the same structure as the first roll 15a may be adopted for the four rolls, and rolls having the same structure as the second roll 15b may be adopted for the four rolls 15a to 15d. Further, the rotation control modes of the four rolls 15a to 15d at the time of crushing are not limited to the normal mode and the high crushing mode as described above, and may be rotated in different rotation control modes.

Further, the adjacent crushed teeth 24, 27, 34, 35 are displaced by 1/2 or 1/3 times the pitch, and the deviation amount may be 1/4 times the pitch. That is, the amount of deviation of the adjacent crushed teeth 24, 27, 34, 35 may be 1 / n times the pitch (n: integer). By shifting the pitch by 1 / n times in this way, the second reference tooth is displaced by 360 / (n × N) (N: the number of teeth of the second crushing ring) degree in the circumferential direction with respect to the first reference tooth. It will be placed. As a result, when the second crushing ring is inverted, the crushing teeth are arranged with a deviation of 360 × (n-1) / (n × N) degrees from the crushing teeth of the first crushing ring (that is, the pitch). It can be used as a crushing ring in which the crushing teeth are displaced in one of the circumferential directions by (n-1) / n times. Therefore, the number of mold types for manufacturing the crushing ring can be reduced compared to the type of crushing ring used, and the manufacturing cost can be reduced.

Further, in the present embodiment, in the first roll 15a and the third roll 15c, the widths of the gaps S1 to S3 are changed by changing the positions of the tooth surfaces of the crushed teeth 24 and 27, but the positions of the tooth bottoms are changed. The width of the gaps S1 to S3 may be changed by changing. Further, in each of the rolls 15a to 15d, the keys 21a and 31a are formed on the shafts 21 and 31, and the key grooves 22a, 23a, 32a and 33a are formed on the crushing rings 22, 23, 32 and 33. A key groove may be formed and a key may be formed on the crushing ring.

Further, although the plurality of crushing rings 22 and 23 are arranged in order, a crushing ring having crushing teeth in which at least one of the plurality of crushing rings is arranged differently may be used. Even in this case, since the timing at which the load acting on at least one crushing ring becomes large can be shifted, it is useful for leveling the change over time of the load.

Further, the high tooth formation site 30H and the low tooth formation site 30L of the first roll 15a and the third roll 15c do not necessarily have to be arranged in a staggered pattern, and may be arranged in a striped pattern. Further, the high tooth formation site 30H and the low tooth formation site 30L may be randomly arranged.

1 Cooler device 15 Roll crusher 15a 1st roll 15b 2nd roll 15c 3rd roll 15d 4th roll 17 Rotating unit 21 1st shaft 21a Key 22 1st crushing ring 22a Key groove 23 2nd crushing ring 23a Key groove 24 crushing tooth 24a high tooth 24c low tooth 24d first reference tooth 25 first high tooth formation site 26 first low tooth formation site 27 crushed tooth 27a high tooth 27c low tooth 27e second reference tooth 28 second high tooth formation site 29 second low Tooth formation site 30H High tooth formation site 30L Low tooth formation site 31 Second shaft 31a Key 32 First crushing ring 32a Key groove 33 Second crushing ring 33a Key groove 34 Crushed tooth 34a First reference tooth 35 Crushed tooth 35a Second reference Teeth 36 dentition

Claims (5)

A roll crusher for crushing the granular transported material in a cooler device that cools the granular transported material while transporting the granular material.
A plurality of rolls are provided which are arranged side by side in the transport direction with a gap between them and are rotated by a rotating unit around an axis orthogonal to the transport direction and parallel to each other to crush the granular transport.
At least two of the plurality of rolls are load reduction rolls.
The load reduction roll has a plurality of crushing rings and has a plurality of crushing rings.
Each of the plurality of crushing rings has a plurality of crushing teeth arranged at equal intervals in the circumferential direction on the outer peripheral surface.
At least one of the plurality of crushing rings is arranged so as to be displaced in the circumferential direction with respect to the plurality of crushing teeth of the adjacent crushing rings so as to shift the timing at which the load at the time of crushing becomes large. Has been
The adjacent load reducing rolls each have the crushing ring in which the displacement amounts of the plurality of crushing teeth in the circumferential direction are different from each other.
The crushed teeth of the adjacent load reducing rolls are arranged so as to diversify and abut each other.
The plurality of crushed teeth are roll crushers of a cooler device including the high teeth which are the crushed teeth having a first height and the low teeth which are the crushed teeth having a second height lower than the first height. The plurality of crushing teeth are arranged on the outer peripheral surface of the crushing ring at a predetermined pitch, and one of the pitches with respect to the plurality of crushing teeth of the crushing ring adjacent to the axial direction in which the axis extends extends. The roll crusher of the cooler device according to claim 1, which is arranged so as to be displaced in one circumferential direction by / n times (n: an integer of 2 or more). The load reduction roll has a shaft that extends in the axial direction and is rotated about the axis by the rotating unit.
The shaft has either an engaging piece or an engaged groove that extends in the axial direction and engages with the outer peripheral surface thereof.
The plurality of crushing rings have one of the engaging piece and the engaged groove on the inner peripheral surface, and the engaging piece is engaged with the engaged groove so as to be relative to the circumferential direction. It is non-displaceable and is exteriorized on the shaft.
The plurality of crushing rings include a first crushing ring and a second crushing ring.
The first crushing ring has a first reference tooth which is one of the plurality of crushed teeth.
The second crushing ring has a second reference tooth, which is one of the plurality of crushed teeth.
The first reference tooth is located on a line connecting the center of the first crushing ring and the center of any one of the engaging piece and the engaged groove.
The second reference tooth according to claim 2, wherein the second reference tooth is arranged so as to be offset by 360 / (n × N) (N: the number of teeth of the second crushing ring) in the circumferential direction with respect to the first reference tooth. Roll crusher for cooler device. On the outer peripheral surface of the load reducing roll, there are a high tooth forming portion in which a plurality of the high teeth are arranged in the circumferential direction and a low tooth forming portion in which the plurality of the low teeth are arranged in the circumferential direction. The roll crusher of the cooler device according to any one of claims 1 to 3, wherein the high tooth forming portion and the low tooth forming portion are arranged in a staggered pattern. The load reduction roll has a shaft that extends in the axial direction in which the axis extends and is rotated around the axis by the rotating unit.
The plurality of crushing teeth are arranged on the outer peripheral surface of the crushing ring at equal intervals at a predetermined pitch, and the crushing teeth of the crushing ring are adjacent to the crushing teeth in the axial direction at the pitch of the plurality of crushing teeth. Arranged by 1/2 times in one direction in the circumferential direction
The shaft has either an engaging piece or an engaged groove extending in the axial direction and engaging with each other on the outer peripheral surface.
The plurality of crushing rings have one of the engaging piece and the engaged groove on the inner peripheral surface, and the engaging piece is engaged with the engaged groove so as to be relative to the circumferential direction. It is non-displaceable and is exteriorized on the shaft.
On the outer peripheral surface of the crushing ring, there are the high tooth forming portion where at least two or more of the high teeth are lined up and the low tooth forming portion where at least two or more of the low teeth are lined up.
The plurality of crushing rings include a first crushing ring and a second crushing ring.
The first crushing ring is one of the plurality of crushing teeth and is located on a line connecting the center of the first crushing ring and the center of any one of the engaging piece and the engaged groove. The high tooth formation site and the low tooth formation site are alternately arranged in the circumferential direction with the first reference tooth as a reference on the outer peripheral surface of the first reference tooth.
The second crushing ring is one of the plurality of crushed teeth and is arranged on one side in the circumferential direction with respect to the first reference tooth at a deviation of 1/2 times the pitch. The high tooth forming portion and the low tooth forming portion are alternately arranged on the outer peripheral surface of the second crushing ring in the circumferential direction with the second reference tooth as a reference.
The roll crusher of the cooler device according to claim 4, wherein the first crushing ring and the second crushing ring are formed so as to have rotational symmetry around the respective axes.

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