JP3764947B2 - Raw material supply equipment for rotary crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a raw material supply device for a rotary crusher that is optionally provided (selectively equipped) in a rotary crusher, and can supply a crushing raw material equally to the crusher crushing chamber in the circumferential direction of the crushing chamber. The present invention relates to a raw material supply device for a rotary crusher.
[0002]
[Prior art]
FIG. 7 is an explanatory view of the configuration of a conventional raw material supply device for a rotary crusher. In the figure, 51 is an upper bearing that supports the upper end of a main shaft (not shown) of the rotary crusher, and the upper bearing 51 is a radial shape fixed to the upper end of the upper frame (upper body) 52 of the rotary crusher. The spider arm 53 is supported. Reference numeral 54 denotes a crusher hopper fixed to the upper frame 52. A crushing chamber (not shown) of a rotary crusher is formed between a cone cave (not shown) mounted on the inner peripheral surface of the upper frame 52 and a mantle (not shown) attached to the main shaft.
[0003]
A raw material supply device for a rotary crusher (hereinafter simply referred to as a raw material supply device) includes an inclined plate-type raw material supply rotation chute 65 rotatably supported by an attachment base 61 fixed to the upper bearing 51. As shown in FIG. 7, the inclined plate type material supply rotating chute 65 is fixed by inclining and fixing a rectangular material supply inclined plate 67 on the inner peripheral surface of a cylindrical body 66 having a partially cut cylindrical shape. The rotation center cylindrical body 64 is fixed to the back surface side (the upper bearing 51 side) of the inclined plate 67. A liner 67 a is provided over the entire surface of the raw material supply inclined plate 67. A driven pulley (not shown) is attached to the outer periphery of the cylindrical body 66. On the other hand, a fixed main shaft 62 extending in the vertical direction is fixed to the mounting base 61, and a rolling bearing 63 is mounted on the fixed main shaft 62. The rotation center cylindrical body 64 is rotatably supported by the fixed main shaft 62 via a rolling bearing 63, whereby the inclined plate type material supply rotation chute 65 rotates on the mounting base 61 fixed to the upper bearing 51. Supported as possible. The inclined plate type material supply rotation chute 65 is rotated via a belt pulley mechanism (not shown) by driving an electric motor (not shown) attached to an electric motor mounting base (not shown) on the outer peripheral surface of the crusher hopper 54. It has become so.
[0004]
In the rotary crusher equipped with such a raw material supply device, the rotating chute 65 in which the crushing raw material (raw stone) is rotated from the head chute of the belt conveyor disposed above the inclined plate type raw material supply rotating chute 65. Supplied in. The supplied crushing raw material flows obliquely downward along the inclination on the raw material supply inclined plate 67 and moves to the crushing chamber 55 entrance of the rotary crusher while moving in the circumferential direction according to the rotation of the inclined plate type raw material supply rotating chute 65. It is made to be supplied.
[0005]
In addition, there is a raw material rotation supply device for a rotary crusher proposed in Japanese Utility Model Laid-Open No. 6-48831 as another conventional technique. As shown in FIG. 9, this raw material rotation supply apparatus has an outlet chute 82 at the lower part of a cylindrical main body 81, and is rotatable about an axis perpendicular to the upper part of the inlet hopper 75 of the rotary crusher. In a raw material rotation supply device of a rotary crusher that is provided and into which crushing raw material is fed from a belt conveyor, an inclined plate 83 that is inclined in the opposite direction so as to intersect the outlet chute 82 at the upper part of the main body 81 is provided. It is arranged. In FIG. 9, 71 is the main shaft of the rotary crusher, 72 is the upper bearing, 73 is the spider arm, and 74 is the crushing chamber.
[0006]
[Problems to be solved by the invention]
However, the raw material supply apparatus shown in FIG. 7 has a problem that uneven supply of the crushed raw material to the crushing chamber occurs. That is, as shown in FIG. 8A, when the flow direction of the crushed raw material introduced from the head chute C ′ of the belt conveyor C and the flow direction of the crushed raw material on the raw material supply inclined plate 67 are the same direction, The flow-down speed on the raw material supply inclined plate 67 becomes substantially the same as the input speed from the head chute C ′. On the other hand, as shown in FIG. 8B, the flow direction of the crushed raw material fed from the head chute C ′ of the belt conveyor C and the flow direction of the crushed raw material on the raw material supply inclined plate 67 are opposite to each other. In this case, the crushed raw material from the head chute C ′ is stagnated by temporarily blocking the hand going by the raw material supply inclined plate 67, and the flow down speed on the raw material supply inclined plate 67 is lower than in the case of (a). As a result, every time the raw material supply inclined plate 67 makes one rotation, the crushing raw material supplied to the crushing chamber 55 increases compared to (b) when (a), and conversely decreases when (b). Uneven supply of crushing raw materials to the crushing chamber occurred. For this reason, there was a problem that the corn cave in the crushing chamber was unevenly worn. If the corn cave wears unevenly, the clearance at the crushing chamber outlet will deviate from a certain value and the quality of the crushed product will deteriorate.
[0007]
Further, in the raw material supply apparatus of FIG. 7, since the crushed raw material is received by the raw material supply inclined plate 67, the entire rotary crusher provided with the raw material supply apparatus by providing the raw material supply inclined plate 67. Therefore, the apparatus cost is increased to increase the mechanical strength. Furthermore, since dead stock due to the crushed raw material is not formed on the raw material supply inclined plate 67, the wear of the liner 67a on the surface of the raw material supply inclined plate 67 is remarkable, and the life of the raw material supply inclined plate 67 is short. .
[0008]
On the other hand, in the raw material rotating and feeding apparatus of FIG. 9, by providing an inclined plate 83 inclined in the opposite direction so as to intersect the outlet chute 82 at the upper part of the cylindrical main body 81, We try to avoid uneven supply.
[0009]
However, in the raw material rotation supply device of FIG. 9, since the crushed raw material is received by the inclined outlet chute 82 and the inclined plate 83, the raw material still remains in the same manner as the raw material supply device of FIG. There are problems that the entire height of the rotary crusher provided with the rotation supply device is high and the life of the liner is short. Furthermore, since the main body 81 is supported by the support tire 84, a large supporting tire 84 that supports a considerable weight is required as the support tire 84. To support the support tire 84 and the main body 81, a sturdy steel is required. Since it is also necessary to provide the manufactured frame 85 on the inlet hopper 75 of the rotary crusher, the weight of the entire apparatus increases, which causes an increase in apparatus cost.
[0010]
The present invention has been made under such circumstances, and an object of the present invention is to supply the crushing raw material to the crusher crushing chamber evenly in the circumferential direction of the crushing chamber, The height and weight of the rotary crusher can be reduced when compared with the conventional type, and it is possible to prevent premature wear of the portion that receives the input crushing raw material. It is providing the raw material supply apparatus for dynamic crushers.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention has the following configuration. That is, the invention according to claim 1 is a bottomed cylindrical material supply rotation chute that is rotatably supported by a spindle upper end support mechanism of a rotary crusher and into which crushing material is introduced from above, and the material supply rotation chute. A rotation chute drive source for rotating the material supply, the material supply rotation chute has a plurality of material discharge openings in the chute peripheral wallThe chute bottom of the raw material supply rotating chute is provided with an annular projection surrounding the dead stock region, and a liner is provided at a portion excluding the dead stock region.This is a raw material supply device for a rotary crusher.
[0012]
  The invention of claim 2A bottomed cylindrical material supply rotation chute that is rotatably supported by a spindle upper end support mechanism of a rotary crusher and into which crushing material is charged from above, and a rotation chute drive source for rotating the material supply rotation chute The raw material supply rotary chute has a plurality of raw material discharge openings on a chute peripheral wall, a dead stock region at a horizontally extending chute bottom, and the chute of the raw material supply rotary chute A raw material supply device for a rotative crusher, wherein a portion between adjacent raw material discharge openings in a peripheral wall is a dead stock region, and a liner is provided in the dead stock regionIt is.
[0013]
According to a third aspect of the present invention, in the raw material supply device for the rotary crusher according to the first or second aspect, driven side separating means for preventing the rotational force from the rotary chute drive source from being transmitted to the raw material supply rotary chute. And an abnormal processing means for detecting an abnormal stop of the raw material supply rotary chute during operation and stopping the rotary chute drive source.
[0014]
The invention according to claim 4 is the raw material supply device for a rotary crusher according to any one of claims 1 to 3, wherein the rotary chute drive source is controlled to be variable in speed. It is what.
[0015]
  A fifth aspect of the present invention provides the raw material supply device for a rotary crusher according to any one of the first to fourth aspects, wherein the raw material supply rotation chute isThe direction of rotation can be reversed.It is characterized by this.
[0017]
According to the raw material supply device for a rotary crusher according to claim 1, the raw material supply rotary chute having a bottomed cylindrical shape is provided, and when the operation is started, first of the chute bottom portion extending horizontally of the raw material supply rotary chute is provided. In the dead stock area, dead stock is formed by the crushed raw material. After that, the crushed raw material dropped from above and dropped on the dead stock is evenly distributed around the dead stock due to the centrifugal force generated by the rotation of the raw material supply rotating chute, and a plurality of raw material discharge openings on the peripheral wall of the chute More evenly released. Thereby, a crushing raw material can be equally supplied to the crusher crushing chamber in the crushing chamber circumferential direction.
[0018]
According to the raw material supply device for the rotary crusher of claim 1, the bottomed cylindrical shape that receives the raw material supply rotation chute at the bottom of the chute extending horizontally and discharges it from the raw material discharge opening of the chute peripheral wall. Therefore, the height and weight of the rotary crusher can be reduced as compared with the conventional device when the apparatus is mounted on the rotary crusher.
[0019]
Furthermore, according to the raw material supply device for a rotary crusher according to claim 1, a dead stock is formed by a part of the crushing raw material at the bottom of the chute, and the crushing raw material charged from above is dropped onto the dead stock. Since it did in this way, the wear of the dead stock area | region of a chute | shoot bottom part can be prevented.
[0020]
  Furthermore, in claim 1According to the raw material supply device for the rotary crusher, since the annular protrusion surrounding the dead stock region is provided at the chute bottom of the raw material supply rotation chute, the fine particles of 20 to 30 mmφ or less are removed. Even in the case of a raw material, it is possible to reliably form a dead stock by a crushed raw material on the dead stock region. A liner is provided on the bottom of the chute except for the dead stock area. By these things, the chute bottom part of a raw material supply rotation chute can be protected reliably and the early wear can be prevented.According to the raw material supply device for a rotary crusher of claim 2, the portion between the adjacent raw material discharge openings in the chute peripheral wall of the raw material supply rotary chute is made a dead stock region, and the liner is provided in the dead stock region. Therefore, it is possible to prevent the chute peripheral wall from being damaged by the crushing raw material colliding with a high impact force at a high speed.
[0021]
According to the raw material supply device for a rotary crusher according to claim 3, when the crushing raw material is clogged in the crusher crushing chamber and the raw material supply rotation chute is overloaded, the driven side such as a torque limiter is used. The separating means prevents the rotational force from the rotary chute drive source from being transmitted to the raw material supply rotary chute, so that excessive torque is generated in the rotary chute drive source and the rotary chute drive source is broken or the rotary chute drive source rotates. It is possible to prevent the belt transmitting the force to the raw material supply rotating chute from being damaged. In addition, when the driven side separation means is operated by the abnormality processing means to stop the rotation of the raw material supply rotation chute, or when the rotation of the raw material supply rotation chute stops due to the belt being removed during operation, etc. An abnormal stop of the raw material supply rotary chute during operation is detected, the rotary chute drive source is stopped, and the supply of the crushing raw material is stopped. Can be prevented.
[0022]
Further, according to the raw material supply device for a rotary crusher according to claim 4, since the rotational chute drive source can be controlled to be variable in speed, the rotational speed of the raw material supply rotary chute is adjusted according to the properties of the crushing raw material. It is possible to prevent clogging due to retention of the crushed raw material in the raw material supply rotating chute and to ensure a stable operation state.
[0024]
  Claims5According to the raw material supply device for the rotary crusher, since the rotation direction of the raw material supply rotary chute can be reversed, the crushing raw material released from the raw material supply rotary chute is the upper end of the main shaft of the rotary crusher. It is possible to avoid a “one-sided state” of colliding with only one side surface of the spider arm constituting the support mechanism, thereby extending the life of the spider arm. By operating with the rotation direction of the raw material supply rotation chute appropriately changed, it is possible to avoid the “one-sided state” that occurs when the rotation direction of the raw material supply rotation chute is always the same.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front longitudinal sectional view of a rotary crusher provided with a raw material supply device for a rotary crusher according to an embodiment of the present invention. A cross section is shown.
[0026]
In FIG. 1, reference numeral 21 denotes a main shaft extending in the vertical direction of the rotary crusher, and an upper portion of the main shaft 21 is illustrated. An upper bearing 22 supports the upper end of the main shaft 21, and the upper bearing 22 is supported by a spider arm 24 fixed to the upper end of an upper frame (upper body) 23 of the rotary crusher. The upper bearing 22 and the spider arm 24 constitute a spindle upper end support mechanism. Reference numeral 25 denotes a crusher hopper having an empty cross-section circle fixed to the upper frame 23. A crushing chamber (not shown) of a rotary crusher is formed between a cone cave (not shown) mounted on the inner peripheral surface of the upper frame 23 and a mantle (not shown) attached to the main shaft 21.
[0027]
And the raw material supply apparatus of this embodiment is rotatably supported on the flat mounting base 1 attached to the upper bearing 22 of a rotary crushing machine, and is a bottomed cylindrical shape into which a crushing raw material is thrown from the upper direction. , A motor 10 with a speed reducer as a rotation chute drive source attached to a motor mounting base 9 fixed to the outer peripheral surface of the crusher hopper 25, and a material supply rotation by driving the motor 10. A belt pulley mechanism for rotating the chute 5. The belt pulley mechanism is fixed to a drive side pulley 12 coupled to an output shaft of an electric motor 10 with a speed reducer via a spring type torque limiter (driven side separating means) 11 directly coupled to the output shaft, and a raw material supply rotating chute 5. The rotation chute side pulley (driven pulley) 6f, and the driving pulley 12 and the belt (endless belt) 13 wound around the rotation chute pulley 6f are configured. Reference numeral 14 denotes a belt cover. Further, the electric motor 10 with a speed reducer can be rotated in the forward and reverse directions, and the rotational speed setting can be changed according to the properties of the crushed raw material by an inverter type speed control device (not shown).
[0028]
FIG. 2 is a front view showing the left half of the raw material supply rotating chute of the raw material supply device for the rotary crusher in FIG. FIG. 3 is a plan view thereof.
[0029]
As shown in FIGS. 2 and 3, the raw material supply rotary chute 5 has a cylindrical chute peripheral wall 6 erected on a flat bottom plate 7 a constituting a horizontally extending chute bottom 7 around the axis of the bottom plate 7 a. The rotation center cylindrical body 4 is fixed to the back side of the bottom plate 7a with a bracket. The upper surface of the rotation center cylinder 4 is closed. A fixed main shaft 2 extending in the vertical direction is fixed to the mounting base 1, and a rolling bearing 3 is mounted on the fixed main shaft 2. The rotation center cylindrical body 4 is rotatably supported with respect to the fixed main shaft 2 via a rolling bearing 3, so that the raw material is supplied onto the mounting base 1 fixed to the upper bearing 22 of the rotary crusher. A rotating chute 5 is supported rotatably.
[0030]
With reference to FIG.2 and FIG.3, the structure of the chute | shoot peripheral wall 6 of the raw material supply rotation chute 5 is demonstrated first. A plurality of raw material discharge openings 6a along the circumferential direction in the present embodiment are provided in the chute peripheral wall 6 having an empty cross-sectional circle, spaced apart from each other. As shown in FIG. 2, each raw material discharge opening 6 a is an opening that rises from the bottom plate 7 a and has a rectangular shape in front view along the circumferential direction. The upper inner peripheral liner 6b made of steel is fixed to the upper inner peripheral surface of the chute peripheral wall 6 with screws.
[0031]
Further, a portion (three locations in the present embodiment) between adjacent raw material discharge openings 6a on the chute peripheral wall 6 is dead by attaching a flat steel side liner 6c to this portion by bolting. It has been a stock area. On both sides of the side liner 6c in the width direction, prismatic steel partition members 6d extending in the vertical direction are attached so as to protrude from the surface of the side liner 6c. In the present embodiment, a total of three dead stock areas are provided. Reference numeral 6f denotes a rotating chute-side pulley fixed to the upper outer peripheral surface of the chute peripheral wall 6. Further, a metal protrusion 6e for detecting an abnormal stop of the raw material supply rotary chute 5 is fixed to the upper outer peripheral surface of the chute peripheral wall 6 using a high-frequency proximity switch (not shown). The high-frequency proximity switch is disposed at a position outside the chute peripheral wall 6 with a predetermined gap (5 to 10 mm) facing the metal protrusion 6e that passes along with the rotation. Yes.
[0032]
Next, the structure of the chute bottom 7 of the raw material supply rotating chute 5 will be described with reference to FIGS. 2 and 3 and FIG. 4 is a longitudinal sectional view of the chute bottom of the raw material supply rotary chute in FIG. The flat bottom plate 7a described above has a hexagonal shape in which three apex portions of a triangle are cut off. As shown in FIG. 3, on the bottom plate 7a, a dead stock region 7b having a nearly circular shape having a nine-sided plan view centering on the axis of the bottom plate 7a is provided. On this bottom plate 7a, a plate-shaped steel bottom plate liner 7c divided into nine parts in the present embodiment so as to surround the dead stock region 7b so as to surround the dead stock region 7b. Is fixed by screwing. A prismatic shape extending in the horizontal direction in a state of projecting upward from the surface of the bottom plate liner 7c and projecting toward the center of the dead stock region 7b on a straight side facing the dead stock region 7b of each bottom plate liner 7c. A steel partition member 7d is attached. In this embodiment, a total of nine steel partition members 7d are attached. The nine steel partition members 7d constitute an annular protrusion that surrounds the dead stock region 7b.
[0033]
In the rotary crusher provided with the raw material supply device configured as described above, the rotation direction of the main shaft 21 of the rotary crusher and the rotation direction of the raw material supply rotation chute 5 are set in the same direction, for example, and the raw material supply rotation chute From the head chute of the belt conveyor disposed above 5, the crushed raw material is fed toward the dead stock region 7 b of the rotating raw material supply rotary chute 5. When the operation is started, first, dead stock made of crushed raw material is formed in the dead stock region 7b on the bottom plate 7a of the raw material supply rotating chute 5. Thereafter, the crushed raw material that has been introduced from above and dropped onto the dead stock is evenly distributed around the dead stock by the centrifugal force generated by the rotation of the raw material supply rotating chute 5, and each raw material discharge opening on the chute peripheral wall 6 is dispersed. It is discharged evenly from 6a. Thereby, a crushing raw material can be equally supplied to the crushing chamber of a rotary crusher in the crushing chamber circumferential direction, and uneven wear of the cone cave in the crushing chamber can be prevented.
[0034]
Further, according to this raw material supply apparatus, the raw material supply rotary chute 5 is received by the portion of the dead stock region 7b on the bottom plate 7a extending horizontally, and is discharged from each raw material discharge opening 6a of the chute peripheral wall 6. Since it has a bottom-cylindrical structure, the height and weight of the rotary crusher can be reduced compared to the conventional type when installed in a rotary crusher. Compared to the above, the apparatus cost can be reduced.
[0035]
Further, according to this raw material supply apparatus, the dead stock by the crushed raw material is formed in the dead stock region 7b on the bottom plate 7a, and the crushed raw material charged from above is dropped on this dead stock. The wear of the dead stock region 7b can be prevented. Furthermore, since the annular protrusions by the nine steel partition members 7d surrounding the dead stock region 7b are provided, even in the case of a crushed raw material from which fine particles of 20 to 30 mmφ or less are removed, the dead stock region 7b Dead stock can be formed on top. In addition to this, on the bottom plate 7a, a bottom plate liner 7c is provided in the remaining portion excluding the dead stock region 7b, and an annular protrusion formed by the steel partition member 7d is provided in the dead stock region 7b of the bottom plate liner 7c. The crushed raw material does not collide with the portion of the straight side facing. Therefore, the bottom plate 7a can be reliably protected by these things. Further, by forming the dead stock, it is possible to reduce the wear of the bottom plate liner 7c and extend its life compared to the conventional inclined chute.
[0036]
Further, according to this raw material supply device, when the crushing raw material is clogged in the crusher crushing chamber and the raw material supply rotary chute 5 is overloaded with a set value or more, the speed reducer is applied to the drive pulley 12. Since the spring type torque limiter 11 directly connected to the output shaft of the motor 10 with a slip is slipped so that the rotational force by the motor 10 with a speed reducer is not transmitted to the raw material supply rotation chute 5, excessive torque is applied to the motor 10 with a speed reducer. It is possible to prevent the motor 10 with a speed reducer from being broken and the belt 13 transmitting the rotational force from being damaged. A pulse signal is output from the high-frequency proximity switch when the metal projection 6e passes along with the rotation of the raw material supply rotating chute 5, and the pulse signal from the high-frequency proximity switch is output. Can be recognized that the rotation of the raw material supply rotation chute 5 has stopped when the power is continuously output without interruption for a certain period of time. According to this raw material supply device, when the rotation of the raw material supply rotation chute 5 is stopped by slipping the spring type torque limiter 11 or when the belt 13 is detached during operation, the rotation of the raw material supply rotation chute 5 is caused. An abnormal processing means for detecting an abnormal stop of the raw material supply rotation chute 5 during operation such as when stopped and stopping the motor 10 with a speed reducer and stopping the supply of the crushed raw material is provided. It is possible to prevent the occurrence of damage to the rotary crusher.
[0037]
Moreover, according to this raw material supply apparatus, since the speed setting of the motor 10 with a reduction gear can be changed by an inverter type speed control device (not shown), the rotational speed of the raw material supply rotation chute 5 is matched to the properties of the crushed raw material. It is possible to prevent clogging due to retention of the crushed raw material in the raw material supply rotating chute 5, and to ensure a stable operation state. For example, a crushed raw material containing a lot of water is likely to stay in the raw material supply rotary chute 5 and is likely to be clogged due to the progress of the stay. By increasing the rotational speed of 5, the clogging of the crushed raw material in the raw material supply rotating chute 5 can be prevented.
[0038]
Further, according to this raw material supply apparatus, the portion between the adjacent raw material discharge openings 6a in the chute peripheral wall 6 of the raw material supply rotary chute 5 is formed as a dead stock region by providing the side liner 6c. Thus, damage to the chute peripheral wall 6 due to the crushing raw material colliding with a large impact force can be prevented. Moreover, since the steel partition members 6d are provided on both sides of each side liner 6c, the dead stock can be reliably formed in the dead stock region.
[0039]
Moreover, according to this raw material supply apparatus, since the rotation direction of the raw material supply rotation chute 5 can be reversed, the crushing raw material released from the raw material supply rotation chute 5 is transferred to the spider arm 24 of the rotary crusher. It is possible to avoid a “one-sided contact state” of colliding only with one side surface, thereby extending the life of the spider arm 24. By operating with the rotation direction of the raw material supply rotation chute 5 being changed as appropriate, the “one-sided state” that occurs when the rotation direction of the raw material supply rotation chute 5 is always the same can be avoided.
[0040]
FIG. 5 is a longitudinal sectional view showing another embodiment of the chute bottom portion of the raw material supply rotary chute according to the present invention, and FIG. 6 is a plan view of the raw material supply rotary chute (excluding the pulley). The difference from the chute bottom 7 of the raw material supply rotating chute in FIG. 1 is that, in this other embodiment, the dead stock region 8b is formed by a circular dish-shaped bottom plate 8a ′ having an annular projection 8a′a on the periphery. There is in point.
[0041]
As shown in FIGS. 5 and 6, the horizontally extending chute bottom 8 includes a steel circular dish-shaped bottom plate 8a ′ having an annular protrusion 8a′a on the periphery, and the circular dish-shaped central circular hollow portion. It is constituted by a steel bottom plate 8a into which the bottom plate 8a ′ is fitted. Further, on the bottom plate 8a, a plate-shaped steel bottom plate liner 8c divided into nine parts so as to surround the circular dish-shaped bottom plate 8a ′ forming the circular dead stock region 8b (the bottom plate The same structure as that of the liner 7c for use is fixed. The annular protrusion 8a'a facilitates the formation of the dead stock and functions so that the crushing raw material does not collide with the portion of the straight side facing the dead stock region 8b of the bottom plate liner 8c. As a result, as in the case of FIG. 1, the bottom plates 8a and 8a 'can be protected and the early wear of the bottom plates 8a and 8a' can be reliably prevented.
[0042]
【The invention's effect】
As described above, according to the raw material supply apparatus for the rotary crusher of the invention of claim 1, the raw material supply rotation chute having a bottomed cylindrical shape is provided, and the crushing is thrown from above and falls on the dead stock. Since the raw material is distributed evenly around the dead stock by the centrifugal force generated by the rotation of the raw material supply rotating chute, and is released uniformly from the respective raw material discharge openings on the chute peripheral wall of the raw material supply rotating chute. The crushing raw material can be supplied evenly in the crushing chamber circumferential direction to the crushing chamber of the rotary crushing machine, thereby preventing uneven wear of the corn cave in the crushing chamber and maintaining the quality of the crushed product well. In addition, the raw material supply rotating chute has a bottomed cylindrical structure that receives the crushing raw material at the bottom of the chute that extends horizontally, and discharges it from the raw material discharge opening on the chute peripheral wall. When equipped, the rotary crusher can be reduced in height and weight as compared with the prior art, thereby reducing the cost of the apparatus as compared with the prior art. Furthermore, since dead stock made of crushed raw material is formed at the bottom of the chute, it is possible to prevent premature wear of the portion that receives the crushed raw material to be charged.
[0043]
  Further claim 1According to the raw material supply device for the rotary crusher of the invention, since the annular protrusion surrounding the dead stock region is provided at the bottom of the chute of the raw material supply rotation chute, fine particles of 20 to 30 mmφ or less are removed. Even in the case of crushed raw materials, a dead stock made of crushed raw materials can be reliably formed on the dead stock area, and a liner is provided in a portion excluding the dead stock area, which ensures the supply of raw materials. The chute bottom of the rotating chute can be protected to prevent premature wear.According to the raw material supply device for a rotary crusher according to the second aspect of the present invention, a portion between adjacent raw material discharge openings in the chute peripheral wall of the raw material supply rotation chute is formed as a dead stock region. Since the liner is provided, damage to the peripheral wall of the chute due to the crushing raw material colliding with high impact force at high speed can be prevented.
[0044]
According to the raw material supply device for a rotary crusher of the invention of claim 3, when the crushing material clogging occurs in the crusher crushing chamber and the material supply rotation chute is overloaded, the torque Since the rotational force from the rotary chute drive source is not transmitted to the raw material supply rotary chute by the follower side separation means such as a limiter, excessive torque is generated in the rotary chute drive source and the rotary chute drive source is broken or rotated. It is possible to prevent the belt that transmits the rotational force of the chute drive source to the raw material supply rotary chute from being damaged. In addition, when the driven side separation means is operated by the abnormality processing means to stop the rotation of the raw material supply rotation chute, or when the rotation of the raw material supply rotation chute stops due to the belt being removed during operation, etc. An abnormal stop of the raw material supply rotary chute during operation is detected, the rotary chute drive source is stopped, and the supply of the crushing raw material is stopped. Can be prevented.
[0045]
Further, according to the raw material supply device for the rotary crusher of the invention of claim 4, since the rotational chute drive source can be controlled to be variable in speed, the raw material supply rotary chute can be controlled in accordance with the properties of the crushing raw material. The rotation speed can be changed, clogging due to the retention of the crushed raw material in the raw material supply rotary chute can be prevented, and a stable operation state can be ensured. For example, a crushed raw material containing a large amount of moisture is likely to stay in the raw material supply rotary chute, and clogging is likely to occur due to the progress of the retention. By increasing the rotation speed, clogging of the crushed raw material in the raw material supply rotary chute can be prevented.
[0047]
  Claims5According to the raw material supply apparatus for the rotary crusher of the invention, since the rotation direction of the raw material supply rotation chute can be forward and reverse, the raw material can be operated by appropriately changing the rotation direction of the raw material supply rotation chute. It can be avoided that the crushing material released from the supply rotating chute collides with only one side surface of the spider arm that constitutes the spindle upper end support mechanism of the rotary crushing machine, This can extend the life of the spider arm.
[Brief description of the drawings]
FIG. 1 is a front longitudinal sectional view of a rotary crusher provided with a raw material supply device for a rotary crusher according to an embodiment of the present invention, with a left half of a raw material supply rotary chute. Is shown in cross section.
2 is a front view showing a left half cross section of a raw material supply rotating chute of the raw material supply device for a rotary crusher in FIG. 1;
FIG. 3 is a plan view of the same.
4 is a longitudinal sectional view of a chute bottom portion of the raw material supply rotating chute in FIG. 2;
FIG. 5 is a longitudinal sectional view showing another embodiment of the chute bottom of the raw material supply rotating chute according to the present invention.
FIG. 6 is a plan view of the raw material supply rotary chute (excluding the pulley).
FIG. 7 is a configuration explanatory view of a conventional raw material supply device for a rotary crusher.
FIG. 87It is a figure for demonstrating operation | movement of the raw material supply apparatus of this, Comprising: The (a) demonstrates the raw material supply state in case the charging direction of a crushing raw material and the raw material flow direction on a raw material supply inclined plate are the same direction. FIG. 8B is a diagram for explaining a raw material supply state when the input direction of the crushed raw material and the raw material flow direction on the raw material supply inclined plate 67 are opposite to each other.
FIG. 9 is a configuration explanatory view of a raw material rotation supply device of a rotary crusher showing another conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mounting base 2 ... Fixed spindle 3 ... Rolling bearing 4 ... Rotation center cylindrical body 5 ... Raw material supply rotation chute 6 ... Chute peripheral wall 6a ... Raw material discharge opening 6b ... Upper inner peripheral liner 6c ... Side liner 6d ... Steel Partition member 6e ... Metal projection 6f ... Rotating chute side pulley 7 ... Chute bottom 7a ... Bottom plate 7b ... Dead stock region 7c ... Bottom plate liner 7d ... Steel partition member 8 ... Chute bottom 8a ... Bottom plate 8a '... Circular dish Bottom plate 8a'a ... annular projection 8b ... dead stock region 8c ... bottom plate liner 9 ... motor mounting base 10 ... motor with speed reducer 11 ... spring torque limiter 12 ... driving pulley 13 ... belt 14 ... belt cover 21 ... Spindle 22 ... Upper bearing 23 ... Upper frame 24 ... Spider arm 25 ... Crusher hopper

Claims (5)

A bottomed cylindrical material supply rotation chute that is rotatably supported by a spindle upper end support mechanism of a rotary crusher and into which crushing material is charged from above, and a rotation chute drive source for rotating the material supply rotation chute The raw material supply rotary chute has a plurality of raw material discharge openings in the chute peripheral wall, has a dead stock region in a horizontally extending chute bottom, and is provided at the chute bottom of the raw material supply rotary chute. Is provided with an annular projection surrounding the dead stock region, and a liner is provided in a portion excluding the dead stock region . A bottomed cylindrical material supply rotation chute that is rotatably supported by a spindle upper end support mechanism of a rotary crusher and into which crushing material is charged from above, and a rotation chute drive source for rotating the material supply rotation chute The raw material supply rotary chute has a plurality of raw material discharge openings on the chute peripheral wall, a dead stock region at the bottom of the chute extending horizontally, and the chute of the raw material supply rotary chute A raw material supply apparatus for a rotatory crusher , wherein a portion of the peripheral wall between adjacent raw material discharge openings is a dead stock region, and a liner is provided in the dead stock region .   A follower-side disconnecting means for preventing the rotational force from the rotary chute drive source from being transmitted to the raw material supply rotary chute, and an abnormal condition for detecting an abnormal stop of the raw material supply rotary chute during operation and stopping the rotary chute drive source The raw material supply apparatus for a rotary crusher according to claim 1 or 2, further comprising a processing means.   The raw material supply apparatus for a rotary crusher according to any one of claims 1 to 3, wherein the rotational chute drive source is controlled to be variable in speed. The raw material supply device for a rotary crusher according to any one of claims 1 to 4, wherein a rotation direction of the raw material supply rotation chute is made reversible.

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