JP2020142220A - Gyratory crusher - Google Patents

Abstract

To provide a gyratory crusher capable of easily rotating a bowl liner by a mechanism where maintenance is easy.SOLUTION: In a gyratory crusher: a cylindrical body 6 fixed with a bowl liner 7 is slidably fitted to the inner periphery of the upper frame 1a of a cylindrical frame 1 in a vertical direction and a circumferential direction; the cylindrical body 6 is fixed at a prescribed fixing position in a vertical position with a plurality of hydraulic cylinders 9 as a support mechanism and an engaging member 10 rotatably attached to the cylindrical frame 1 in a vertical plane; the cylindrical body 6 descends from the fixing position, is rotatably supported with a plurality of rollers 14 and can be easily rotated when fixing to the upper frame 1a is canceled; and manpower is eliminated in maintenance since the engaging member 10 has a simple structure consisting of a screw shaft 11, a nut 12 and a nut 13 with a collar and the small-sized and simple hydraulic cylinder 9 can be adopted.SELECTED DRAWING: Figure 5

Description

The present invention relates to a rotary crusher used for crushing rocks, ores, etc. in aggregate production facilities and the like.

Rotating crushers (hereinafter, also simply referred to as "crushers") used in aggregate production equipment include a truncated cone-shaped mantle that rotates inside a vertically placed tubular frame and a mantle. A mantle liner fixed to the upper surface of the mantle and a bow liner fixed to the tubular frame so as to face the upper surface of the mantle liner are provided, and rocks, ores, etc. supplied from above by rotating the mantle are provided. Many of the objects to be crushed are crushed by mantle liners and bow liners.

In a crusher as described above, since the mantle liner and the bow liner wear during use, a mechanism for changing the vertical position of the mantle liner or the bow liner is usually provided, and the mechanism is adjusted to the progress of wear of both liners. By operating it, the distance between the two liners is maintained within an appropriate range, but it is an effective response to the uneven wear of the mantle liner and bow liner in the circumferential direction caused by the uneven supply of raw materials in the horizontal plane. No means are provided.

Therefore, if uneven wear occurs on the bow liner, it is conceivable to take measures such as removing the bow liner from the tubular frame once, changing the circumferential position with respect to the tubular frame, and then fixing the bow liner again. However, since the work of attaching and detaching the tubular frame of the bow liner must be done manually and the workload is very heavy, the above measures are not actually taken, and the bow liner remains as it is until the uneven wear reaches the limit. In many cases, it is used and replaced, and the short life of the bow liner is a problem.

On the other hand, in Patent Document 1, the bow liner is fixed to a tubular body slidably fitted to the inner circumference of the tubular frame in the vertical and circumferential directions, and between the tubular frame and the tubular frame. A crusher having an annular oil chamber and connecting a hydraulic mechanism to the oil chamber has been proposed. According to this configuration, the baul liner can be moved up and down integrally with the cylinder by the operation of the hydraulic mechanism to adjust the distance from the mantle liner, and the baul liner changes its circumferential position during crushing, so that uneven wear is unlikely to occur. It is said that.

Japanese Unexamined Patent Publication No. 2-258072

However, in the crusher proposed in Patent Document 1 described above, an oil chamber provided between the cylinder and the tubular frame is provided by a large upward load applied from the crushed material to the cylinder via the baul liner at the time of crushing. Since there is a risk of oil leaking from the oil chamber, it is necessary to frequently maintain the seals of the oil chamber.

As a countermeasure against this, for example, an annular hydraulic cylinder is provided between the cylinder and the tubular frame instead of the annular oil chamber between the cylinder and the tubular frame and the hydraulic mechanism connected thereto. Can be considered. However, in that case, the annular hydraulic cylinder needs to be a large one having a radial dimension equivalent to that of the tubular frame, so that it is expensive, the mechanism is complicated, and maintenance is troublesome.

Therefore, an object of the present invention is to provide a rotary crusher capable of easily rotating a bow liner with a mechanism that is easy to maintain.

In order to solve the above problems, the present invention includes a truncated cone-shaped mantle that rotates inside a vertically placed tubular frame, a mantle liner fixed to the upper surface of the mantle, and an upper surface of the mantle liner. In a rotary crusher provided with a bow liner arranged so as to face each other and crushing a crushed object supplied from above by the mantle liner and the bow liner by rotating the mantle, the bow liner is It is fixed to a tubular body slidably fitted to the inner circumference of the tubular frame in the vertical direction and the circumferential direction, and the tubular body is fixed to the tubular frame at a predetermined fixed position in the vertical direction. A configuration is adopted in which a plurality of rollers that rotatably support the tubular body when the tubular body is released from being fixed to the tubular frame are provided.

As a specific configuration of the characteristic portion, a support mechanism for supporting the cylinder at the fixed position by a support member capable of raising and lowering the cylinder is provided, and a position where the support member of the support mechanism supports the cylinder. By descending from, the tubular body is released from being fixed to the tubular frame, and it is possible to adopt one that descends from the fixed position and is supported by the roller. Here, the support mechanism may be composed of a hydraulic cylinder having a rod as the support member.

According to the above configuration, the tubular body to which the bow liner is fixed can be lowered from a predetermined fixed position and rotatably supported by a plurality of rollers simply by releasing the fixation to the tubular frame. In that state, the tubular body can be easily rotated on the roller integrally with the bow liner, and uneven wear of the bow liner can be reduced. The means for fixing the cylinder to the tubular frame may be one that can withstand the upward load applied to the cylinder during crushing, and it is not necessary to use a hydraulic mechanism like a large annular hydraulic cylinder, so that it is suitable for maintenance. It can be a simple structure that does not require much effort.

Further, the tubular body is fixed to the tubular frame by engaging with an engaging member provided on the tubular frame in a state of being supported by the support mechanism at the fixed position. The engaging member is attached to the tubular frame so that when the support member of the support mechanism descends from the position of supporting the tubular body, the engaging member can rotate in a direction away from the tubular body in a vertical plane. If the above configuration is adopted, it becomes possible to easily fix and release the tubular body to the tubular frame.

Further, if at least one of the plurality of rollers is driven by a motor, the cylinder body can be rotated on the rollers only by driving the driveable motor. Compared to the case where the cylinder is rotated by human power, the labor of rotating the cylinder is reduced.

In the rotary crusher of the present invention, as described above, the tubular body to which the bow liner is fixed is rotatably supported by a plurality of rollers when it is released from the tubular frame. Therefore, the cylinder can be easily rotated integrally with the bow liner on the roller. Therefore, by rotating the cylinder at an appropriate maintenance cycle, uneven wear of the bow liner can be reduced and the life can be extended. Further, as a means for fixing the tubular body to the tubular frame, it is not necessary to use a hydraulic mechanism such as a large annular hydraulic cylinder, and a means that can be easily maintained can be adopted.

Longitudinal front view of the rotary crusher of the embodiment Top view of the vicinity of the flange of the cylinder with the hopper removed in FIG. 1 Longitudinal front view showing the main part of FIG. 1 in an enlarged manner Longitudinal front view showing another main part of FIG. 1 in an enlarged manner Longitudinal front view showing a state in which the cylinder of FIG. 1 is lowered. Longitudinal front view showing the main part of FIG. 5 in an enlarged manner Longitudinal front view showing another main part of FIG. 5 in an enlarged manner

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, this rotary crusher arranges a rotating shaft 2 that is rotationally driven around a vertical axis inside a vertically placed tubular frame 1 composed of an upper frame 1a and a lower frame 1b. The lower half of the spindle 3 is fitted into the eccentric inclined hole (not shown) of the rotating shaft 2, a truncated cone-shaped mantle 4 is mounted on the upper half of the spindle 3, and a mantle liner is mounted on the upper surface of the mantle 4. The bow liner 7 is fixed to the tubular body 6 fitted and fixed to the inner circumference of the upper frame 1a so as to face the upper surface of the mantle liner 5. Then, by rotationally driving the rotating shaft 2 to rotate the main shaft 3 and the mantle 4, the crushed material supplied from above via the hopper 8 attached to the cylinder 6 is transferred to the mantle liner 5 and the mantle liner 7. It is designed to be crushed with.

The tubular body 6 is slidably fitted to the inner circumference of the upper frame 1a of the tubular frame 1 in the vertical direction and the circumferential direction, and when the crusher is operated, the upper end is held at a predetermined fixed position in the vertical direction. A flange portion 6a provided on the portion is fixed to the upper frame 1a by a hydraulic cylinder 9 and an engaging member 10 as a support mechanism described later. Lubricating oil is held between the outer peripheral surface of the tubular body 6 and the inner peripheral surface of the upper frame 1a, and when the fixing of the tubular body 6 to the upper frame 1a is released, the tubular body 6 moves in the vertical direction and It can slide smoothly in the circumferential direction.

As shown in FIGS. 1 to 3, the hydraulic cylinder 9 is installed on the upper end surface of the upper frame 1a at equal intervals in the circumferential direction with the rod 9a facing upward, and the rod 9a is a cylinder. It is a support member that can be raised and lowered to support the lower surface of the flange portion 6a of 6.

Further, the engaging member 10 has a screw shaft 11 having a base end portion attached to the upper end portion of the upper frame 1a and having a screw formed at the tip portion, a nut 12 screwed to the tip portion of the screw shaft 11, and a nut 12. It is composed of a brim nut 13, and is arranged at the upper end of the upper frame 1a at equal intervals in the circumferential direction so as not to interfere with the hydraulic cylinder 9. The screw shaft 11 is rotatably attached to the upper frame 1a in a vertical plane, and is closer to the base end side than the coupling position of the flanged nut 13 when the tip is oriented upward in the vertical direction. A part of the cylinder 6 enters the notch 6b formed on the outer peripheral portion of the flange portion 6a.

Then, a part of the screw shaft 11 of the engaging member 10 is inserted into the notch 6b of the flange portion 6a of the tubular body 6, and the nut 12 and the nut 12 and the tubular body 6 are supported by the hydraulic cylinder 9 at the fixed position. The tubular body 6 is fixed to the upper frame 1a by tightening the brim nut 13.

Further, as shown in FIGS. 1, 2 and 4, a roller 14 is rotatably supported on the upper end surface of the upper frame 1a so that the outer peripheral surface faces the lower surface of the flange portion 6a of the tubular body 6. , The upper frame 1a is arranged at equal intervals in the circumferential direction so as not to interfere with the hydraulic cylinder 9 and the engaging member 10. Then, of these rollers 14, two rollers 14 located at positions facing each other across the axial center of the upper frame 1a are attached to a motor 16 attached to an L-shaped bracket 15 projecting from the upper end of the upper frame 1a, respectively. It is designed to be driven by.

This rotary crusher has the above-mentioned configuration, and the procedure for rotating the tubular body 6 to which the bow liner 7 is fixed will be described below in order to suppress uneven wear of the bow liner 7.

When the bow liner 7 is unevenly worn, first, as shown in FIGS. 5 to 7, each hydraulic cylinder 9 is operated and the rod 9a is lowered from the support position of the cylinder body 6 to form a cylinder. The fixing of the body 6 to the upper frame 1a is released, and the cylinder 6 is lowered from the fixed position and rotatably supported by each roller 14. Then, since a gap is formed between the upper surface of the flange portion 6a of the tubular body 6 and the brim nut 13 of the engaging member 10, the engaging member 10 can be easily disengaged without loosening the nut 12 and the brim nut 13. The engagement with the cylinder 6 can be released by rotating the cylinder 6 in a direction away from the cylinder 6. At this time, the engagement conditions between the engaging member 10 and the tubular body 6 are slightly changed, and the engaging member 10 automatically rotates in a direction away from the tubular body 6 due to its own weight. It is also possible to disengage the engagement with.

Next, two rollers 14 of the rollers 14 that support the cylinder 6 are driven by the motor 16 to rotate the cylinder 6 by a predetermined angle on each roller 14. The rotation angle is set so that the notch 6b of the flange portion 6a of the tubular body 6 after rotation and the circumferential position of the engaging member 10 coincide with each other.

Then, after the cylinder 6 is stopped, the engaging member 10 is rotated in the direction opposite to that at the time of disengagement, so that a part of the screw shaft 11 is made into the notch 6b of the flange portion 6a of the cylinder 6. After inserting and engaging with the cylinder 6, each hydraulic cylinder 9 is operated to raise the rod 9a to the support position of the cylinder 6, and the cylinder 6 is supported by each hydraulic cylinder 9 at the fixed position. The state to be done. Finally, if necessary, the nut 12 and the brim nut 13 may be tightened to fix the tubular body 6 to the upper frame 1a.

Here, if the overall wear of the mantle liner 5 and the bow liner 7 has progressed to some extent during the rotation work of the cylinder 6, the rod of the hydraulic cylinder 9 is rotated after the cylinder 6 is rotated. When raising 9a, the stroke amount may be made smaller than that when lowering, and the distance between the mantle liner 5 and the bow liner 7 may be adjusted to an appropriate range.

As described above, this rotary crusher can be easily rotated by being rotatably supported by a plurality of rollers 14 when the tubular body 6 to which the bow liner 7 is fixed is released from being fixed to the upper frame 1a. Therefore, by performing the work of rotating the tubular body 6 integrally with the bow liner 7 at an appropriate maintenance cycle, uneven wear of the bow liner 7 can be reduced and the life can be extended.

Further, of the hydraulic cylinder 9 and the engaging member 10 for fixing the cylinder 6 to the upper frame 1a during operation, the engaging member 10 has a simple structure including a screw shaft 11, a nut 12, and a brim nut 13. There is, since the engaging member 10 receives an upward load applied to the cylinder body 6 at the time of crushing, the hydraulic cylinder 9 may be a small and simple one as long as it can support the own weights of the cylinder body 6 and the bow liner 7. Can be adopted. Therefore, as compared with the case of using a hydraulic mechanism such as a large annular hydraulic cylinder, the manufacturing cost is suppressed and the maintenance is not troublesome.

Further, if the fixing of the cylinder 6 to the upper frame 1a is released, the cylinder 6 (and the mantle liner 7) and the mantle 4 (and the mantle liner 5) can be replaced without removing the upper frame 1a from the lower frame 1b. There are also advantages.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, the support mechanism that supports the cylinder at a fixed position is not limited to the hydraulic cylinder as in the embodiment, and may be any one that can support the weight of the cylinder and the bow liner and has a support member that can be raised and lowered. Further, the engaging member is not limited to that of the embodiment, and for example, a clamp or the like can be used. Further, in the embodiment, two rollers out of a plurality of rollers supporting the cylinder body are driven by a motor to rotate the cylinder body, but the rollers may be driven by human power.

Further, in the embodiment, when the tubular body is released from being fixed to the tubular frame, the tubular body is lowered and supported by a plurality of rollers, but each roller is supported by the lower surface of the flange portion of the tubular body at the fixed position. It may be arranged so as to be in contact with each other so that the tubular body released from being fixed to the tubular frame is supported by each roller at a fixed position without lowering.

1 Cylindrical frame 1a Upper frame 1b Lower frame 2 Rotating shaft 3 Main shaft 4 Mantle 5 Mantle liner 6 Cylindrical body 6a Flange part 7 Bow liner 9 Hydraulic cylinder (support mechanism)
9a rod (support member)
10 Engagement member 11 Screw shaft 12 Nut 13 Brim nut 14 Roller 16 Motor

Claims (5)

It is provided with a truncated cone-shaped mantle that rotates inside a vertically placed tubular frame, a mantle liner fixed to the upper surface of the mantle, and a bow liner arranged so as to face the upper surface of the mantle liner. In a rotary crusher that crushes the crushed material supplied from above by the mantle liner and the bow liner by rotating the mantle.
The bow liner is fixed to a tubular body slidably fitted to the inner circumference of the tubular frame in the vertical and circumferential directions, and the tubular body is fixed to the tubular frame at a predetermined fixed position in the vertical direction. A rotary crusher characterized in that a plurality of rollers are provided to rotatably support the tubular body when the tubular body is released from being fixed to the tubular frame. A support mechanism for supporting the tubular body at the fixed position is provided by a support member capable of raising and lowering the tubular body, and the tubular body is formed into the tubular shape by descending from a position where the support member of the support mechanism supports the tubular body. The rotary crusher according to claim 1, wherein the fixing to the frame is released, the body is lowered from the fixed position, and the roller is supported by the roller. The rotary crusher according to claim 2, wherein the support mechanism comprises a hydraulic cylinder having a rod serving as the support member. The tubular body is fixed to the tubular frame by engaging with an engaging member provided on the tubular frame in a state of being supported by the support mechanism at the fixed position. The member is attached to the tubular frame so that when the support member of the support mechanism descends from the position of supporting the tubular body, the member can rotate in a direction away from the tubular body in a vertical plane. The rotary crusher according to claim 2 or 3. The rotary crusher according to any one of claims 1 to 4, wherein at least one of the plurality of rollers is driven by a motor.

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