US2869707A - Means for conveying crushed material from a gyratory crusher - Google Patents

Description

r a Z/ 14 /j 12 L. M: ANDERSEN Filed June 11, 1956 if. c

Jan. 20, 1959 MEANS FOR CONVEYING CRUSHED MATERIAL FROM A GYRATORY CRUSHER United States Patent" MEANS FOR CUNVEYING CRUSHED MATERIAL FROM A GYRATORY CRUSHER Louis M. Andersen, West Allis, Wis, assignor to Allis- Chairners Manufacturing Company, Milwaukee, Wis.

Application June 11, 1956, Serial No. 590,719

6 Claims. or. 198--56) This invention relates to gyratory crushers and in particular to a means for conveying crushed material from a gyratory crusher to a remote location for storage or use.

Gyratory crushers are usually provided with a shaft assembly positioned vertically within an outer shell. The shaft assembly includes a crusher head mounted on a rotatable shaft and the head cooperates with the surrounding shell structure to define a generally annular crushing chamber. Crushed material is discharged from the crushing chamber through an annular opening around the bottom of the crushing chamber. A gyratory crusher of this type is shown and described in U. S. Patent 2,349,790, granted May 23, 1944. As may be seen in this patent the lower end of the crusher shaft may project a considerable distance below the crushing chamber and may be provided with mechanisms for supporting the shaft, adjusting its vertical position, and drivingly engaging with the shaft to rotate the shaft and crusher head within the outer shell. Material crushed in such a machine is usually deposited on a single conveyer passing beneath the crusher. For a single conveyer to receive material discharged from around substantially the entire circumference of the annular crushing chamber the conveyer must necessarily be positioned below all the mechanisms associated with the lower end of the crushing shaft. This results in space requirements having a vertical height of such magnitude that it often becomes difficult or even impossible to install large machines of this type in existing buildings not having sufficient vertical space for mounting such a crusher assembly. Furthermore, by providing a conveyer beneath the lowest part of a crusher such as shown in the patent referred to, the mechanisms referred to that may be associated with the lower portion of the crusher shaft assembly are exposed to the material falling from the crushing chamber and the dust associated with such falling crushed material. It therefore becomes necessary to provide heavy protective housings for such mechanisms and effective seals to keep out dust.

According to the present invention a pair of conveyers are retractably mounted beneath the discharge opening of a crusher and arranged with one on each side of the crusher shaft and in general parallel alignment with each other. The conveyors are each vertically positioned so that an upper surface of each conveyer is above the lower end of a crusher shaft assembly in close proximity to the bottom of the crushing chamber. A pair of chutes are arranged with one on each side of the crusher shaft assembly with the chutes positioned to each connect onehalf of the discharge opening of the crushing chamber to one of the pair of conveyers. A third conveyer may be arranged transversely of the first and second conveyers for receiving material from both of the pair of conveyers for carrying the material to a place of storage or use.

An object of the arrangement according to the present invention is to provide new and improved means for conveying crushed material away from a gyratory crusher which will reduce the vertical height and horizontal width 2,869,707 la tented Jan. 20, 1959 2 requirements of the space required for the crusher and its associated equipment.

Another object of the present invention is to provide a new and improved conveyer arrangement whereby a crusher can deposit crushed material upon a conveyer without mechanisms associated with the lower portion of the crusher being exposed to falling crushed material and the dust associated therewith.

Another object of the present invention is to provide new and improved means for carrying crushed material away from a gyratory crusher that will be retractable from the space beneath the crusher to provide access for inspection and repair of the various mechanisms associated with the lower portion of a crusher assembly.

Other objects will appear as the description of the invention proceeds.

The novel features of the invention and how the objects are attained will appear from this specification and the accompanying drawing showing an embodiment of the invention and forming a part of this application.

In the drawing:

Fig. l is a view of a crusher installation according to the present invention, in which portions of the crusher foundation structure along with portions of inner and outer crusher housing structures are broken away to more clearly show the arrangement of parts;

Fig. 2 is a view similar to Fig. 1 but as seen from the right side of the installation shown in Fig. 1;. and

Fig. 3 is a view of the crusher installation shown in Figs. 1 and 2 as it would be seen looking down upon the installation from above.

Referring to the drawings an embodiment of the present invention is shown in which a gummy crusher 1 is mounted upon support structure 2. The supporting structure 2 defines a space 3 beneath crusher 1 into which means will be arranged for receiving and carrying crushed material away from the crusher. The crusher itself comprises a shaft assembly it) made up of a shaft 11 held in a vertical position by hearing structure 12. A crushing head 13 is mounted on the shaft 11. The shaft assembly 10 is arra rged within an opening defined by a shell 17. The shell 17 may be provided with a replaceable wear resisting liner 18. The crushing head 13 and the shell 17 cooperate to define a crushing chamber 20. Material is discharged from crushing chamber 20 through an annular discharge opening 21 around the bottom of chamber 20. Means for rotating the shaft assembly 19 within the shell 17 may be connected to the top of the shaft. 11 as shown in U. S. Patent 2,022,135, November 26, 1935 or as herein shown where a generally horizontally disposed pinion shaft assembly 25 is connected to the shaft assembly 10 at a point intermediate the end portions of the main shaft assembly but beneath the discharge opening 21 of the crushing chamber 20. In addition to the bearing structure 12 and the pinion shaft assembly 25 the lower end of the shaft assembly it) may also include mechanisms for adjustably supporting the shaft 11 relative to the shell 1'7 as is shown in Patent 2,349,790 previously referred to.

The means for conveying crushed material away from beneath the crusher 1 after such material has passed through the crushing chamber 26 is shown as comprising a pair of conveyors 30 and 31 mounted beneath the crusher 1 in the space 3. The conveyers 3t] and 31 are each mounted on rollers 32 so that these conveyers may be retracted from the space 3 in order to provide access to the mechanisms included in the lower portion of the shaft assembly 10. The conveyers 30 and 31 are arranged with one each side of the shaft assembly 10 and in general parallel alignment with each other. In embodiments such as the one shown in the drawings where a pinion shaft assembly is driving ly connected to the {is lower portion of the crusher shaft assembly the conveyers 30 and 31 may be arranged in parallel alignment with the pinion shaft assembly.

, Means provided for receiving crushed material passing from the crushing chamber 20 through the discharge opening 21 for depositing this crushed material on the conveyers 3d and 31, may include a pair of chutes 36 and 37. The chutes 36, 37 are arranged with one on each side of the pinion shaft assembly 25. One of the chutes 36 is positioned to connect one-half of the discharge opening 21 to one of the conveyers 3t and the other chute 37 is positioned to connect the other half of the discharge opening 21 to the other conveyer 31. A third conveyer 40 is arranged transversely of conveyers 3d and 31 for receiving material from both of these conveyers for transferring material to a place of storage or use on a single conveyer.

In operation material to be crushed will be delivered to the top of the crusher 1 and dumped into the crushing chamber 2d defined by the shell 17, its liner 18 if it is provided with one, and the crushing head 13. As the crusher shaft it rotates the material placed within the crushing chamber 20 will be broken up and will pass downwardly through the crushing chamber 20 and out. the discharge opening 21. The crushed material will then pass into the pair of chutes 3d and 37 and will be deposited upon the conveyers 3t} and 33 which will in turn deposit the crushed material on the conveyer 40 to be transported to a remote location for storage or use.

By the arrangement described it can be understood that the illustrated embodiment of the invention provides a new and improved arrangement that accomplishes the objects of the invention. On the other hand it will also be apparent to those skilled in this art that the illustrated embodiment of the invention may be variously changed and modified or features thereof embodied in other combinations than that illustrated without departing from the spirit of the invention. Accordingly the disclosure herein is intended to be illustrative only and the invention is not desired to be limited thereto iri all of the details shown and described in the foregoing.

What is claimed is:

1. In means for conveying crushed material from a gyratory crusher supported in an upright position on foundation structure, said crusher having a shell and a vertically positioned main shaft assembly at least partly within said shell, said shell having an inner wall surface defining a substantially annular discharge opening around said shaft assembly, the improvement comprising a first and second conveyer passing directly beneath said discharge opening, an upper surface of said first and second conveyers being above the lower end of said main shaft assembly, said first and second conveyers Y being arranged with one on each side of said main shaft assembly and in generally parallel alignment with each other, and a pair of chutes, one of said chutes positioned to connect one half of said discharge opening to one of said first and second conveyers and the other of said chutes positioned to connect the other half of said opening to the other of said conveyers, each of said chutes having discharge flow directing walls with at least a portion of an outer Wall of said chutes being sloped downwardly and inwardly toward said shaft asneath said discharge opening, an upper surface of said first and second conveyers being above the lower end of said main shaft assembly, said first and second conveyers being arranged with one on each side of said main shaft assembly and in generally parallel alignment with each other, a pair of chutes, one of said chutes positioned to connect one half of said discharge opening to one of said first and second conveyers and the other of said chutes positioned to connect the other half of said opening to the other of said conveyers, each of said chutes having discharge flow directing walls with at least a portion of an outer wall of said chutes being sloped downwardly and inwardly toward said shaft assembly to direct the discharge flow in converging streams onto said first and second conveyers, and a third conveyer arranged transversely of said first and second conveyers for receiving material from both said first and second conveyers.

3. In means for conveying crushed material from a gyratory crusher supported in an upright position on foundation structure, said crusher having a shell and a vertically positioned main shaft assembly at least partly within said shell, said shell having an inner wall surface defining substantially annular discharge opening around said main shaft assembly, and a generally horizontally disposed pinion shaft assembly connected to said main shaft assembly at a point intermediate the end portions of said main shaft assembly and beneath said discharge opening, the improvement comprising a first and second conveyor passing directly beneath said discharge opening, an upper surface of said first and second conveyers being above the lower end of said main shaft assembly, said first and second conveyers being arranged with one on each side of and in generally parallel alignment with said pinion shaft assembly, and a pair of chutes arranged one on each side of said pinion shaft assembly, one of said chutes positioned to connect one half of said discharge opening to one of said first and second conveyers and the other of said chutes positioned to connect the other half of said opening to the other of said conveyers, each of said chutes having discharge fiow directing walls with at least a portion of an outer wall of said chutes being sloped downwardly and inwardly toward said shaft assembly to direct the discharge flow in converging streams onto said conveyers.

4. In means for conveying crushed material from a gyratory crusher supported in an upright position on foundation structure, said crusher having a shell and a vertically positioned main shaft assembly at least partly within said shell, said shell having an inner wall surface defining substantially annular discharge opening around said main shaft assembly, and a generally horizontally disposed pinion shaft assembly connected to said main shaft assembly at a point intermediate the end portions of said main shaft assembly and beneath said discharge opening, the improvement comprising a first and second conveyer passing directly beneath said discharge opening, an upper surface of said first and second conveyers being above the lower end of said main shaft assembly, said first and second conveyers being arranged with one on each side of and in generally parallel alignment with said pinion shaft assembly, a pair of chutes arranged one on each side of said pinion shaft assembly, one of said chutes positioned to connect one half of said discharge opening to one of said first and second conveyers and the other'of said chutes positioned to connect the other half of said opening to the other of said conveyers, each of said chutes having discharge flow directing walls with at least a portion of an outer wall of said chutes being sloped downwardly and inwardly toward said shaft assembly to direct the discharge flow in converging streams onto said first and second conveyers, and a third con veyer arranged transversely of said first and second conveyers for receiving material from both said first and second conveyers.

5. In means for conveying crushed material from a gyratory crusher supported in an upright position on foundation structure, said crusher having a shell and a vertically positioned main shaft assembly at least partly within said shell, said shell having an inner wall surface defining substantially annular discharge opening around said main shaft assembly, and a generally horizontally disposed pinion shaft assembly connected to said main shaft assembly at a point intermediate the end portions of said main shaft assembly and beneath said discharge opening, the improvement comprising a first and second conveyer mounted on rollers passing directly beneath said discharge opening and movable away from said discharge opening, an upper surface of said first and second conveyers being above the lower end of said main shaft assembly, said first and second conveyers being arranged with one on each side of and in generally parallel alignment with said pinion shaft assembly, a pair of chutes arranged one on each side of said pinion shaft assembly,

one of said chutes positioned to connect one half of said discharge opening to one of said first and second conveyers and the other of said chutes positioned to connect the other half of said opening to the other of said conveyers, each of said chutes having discharge flow directing Walls with at least a portion of an outer wall of said chutes being sloped downwardly and inwardly toward said shaft assembly to direct the discharge flow in converging streams onto said first and second conveyers, and a third conveyer arranged transversely of said first and second conveyers for receiving material from both said first and second conveyers.

6. In means for conveying crushed material from a gyratory crusher supported in an upright position on foundation structure, said crusher having a shell and a vertically positioned main shaft assembly at least partly Within said shell and partly depending therebeneath defining a lower shaft segment including a portion having the preselected maximum diametric dimension of said shaft, said shell having an inner wall surface defining asubstantially annular opening around said main shaft assembly and having an internal diametric dimension greater than said preselected maximum diametric dimension of said portion of said shaft, the improvement comprising: a first and second conveyor passing: directly beneath said discharge opening, one of said conveyers being on each side of said main shaft assembly and in generally parallel alignment with each other; and a pair of chutes, one of said chutes being positioned to connect one-half of said discharge opening to one of said conveyers, and the other of said chutes being positioned to connect the other half of said opening to the other of said conveyers, each of said chutes having discharge flow directing walls with a first portion extending vertically downwardly from said discharge opening into a second portion being sloped therefrom downwardly and inwardly toward said lower shaft segment to direct the discharge flow in converging streams onto saidconveyers beneath said portion of said lower shaft segment having said preselected maximum diametric dimension.

References Cited in the file of this patent UNITED STATES PATENTS 669,060 Cascaden Feb. 26, 1901 1,215,739 Stehli Feb. 13, 1917 2,711,858 Kennedy June 28, 1955 FOREIGN PATENTS 540,666 Germany Dec. 28, 1931

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