US3011727A

US3011727A - Pulverizing mill and unloading device therefor

Info

Publication number: US3011727A
Application number: US845820A
Authority: US
Inventors: Varkony Emerich
Original assignee: Toms River-Cincinnati Chemical Corp
Current assignee: Toms River-Cincinnati Chemical Corp
Priority date: 1959-10-12
Filing date: 1959-10-12
Publication date: 1961-12-05
Anticipated expiration: 1978-12-05

Description

PULVERIZING MILL AND UNLOADING DEVICE THEREFOR Filed 001;. 12, 1959 E. VARKONY Dec. 5, 1961 '3 Sheets-Sheet 1 JNVENTOR. EMERICH VAR KON Y.

O W -l ATTORNEYS Dec. 5, 1961 E. VARKONY 3,011,727

PULVERIZING MILL AND UNLOADING DEVICE THEREFOR Fil ed Oct. 12, 1959 5 Shee s-sheet 2 Q INVENTOR.

NEMERICH VARKONY BYGWMS ATTORNEYS,

PULVERIZING MILL AND UNLOADING DEVICE THEREFOR Filed Oct. 12, 1959 E. VARKONY Dec; 5, 1961 '3 Sheets-Sheet 3 E V villi!liillllloolIt!ailllilllrllllfllllliiIII;7 i

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INVENTOR. EMERICH VARKONY FIG.5

WWMSMM ATTORNEYS.

United rates aten.

3,911,727 Patented Dec. 5, 18%1 xfiee Emerich Varhony, Cincinnati, Ohio, assignor to Toms River-Cincinnati Qhemical Corporation, Cincinnati, Ghio, a corporation of Delaware Filed oer. 12, 1959, Ser. No. 845,824

4 (Ilaims. (Cl. 241-171) This invention relates to a mill for crushing, pulverizing, and mixing materials such as dyes, powders, and the like. More particularly this invention relates to a device for unloading such a mill.

An object of this invention is to provide a rod mill or the like and an unloading device therefor which unloads the mill while the mill is in rotation. 1

A further object of this invention is to provide such a device in which material from the interior of the mill passes continuously into a chamber at an end of the mill arid is continuousy returned to the interior of the mill automatically during normal operation of the mill but in which valves or doors are provided for permitting flow of the material outwardly from the chamber when the mill is being unloaded.

A further object of this invention is to provide a device of this type in which a rotatably mounted discharge member is attached to an end chamber or housing during the unloading operation which rotatable member is connected to a discharge chute for discharging the contents into a product receiver.

The above and other objects and features of the invention will be apparent to those skilled in the art to which this invention pertains from the following detailed description and the drawings, in which:

FIG. 1 is a view partly in side elevation and partly in section showing a rod mill and discharge device therefor constructed in accordance with an embodiment of this invention;

FIG. 2 is a view in end elevation thereof, a product receiver and supports for the discharge device being removed for clarity;

FIG. 3 is an enlarged view in transverse section of the head portion of the discharge device;

FIG. 4 is a view in section taken generally on the line 44 of FIG. 3;

FIG. 5 is an enlarged fragmentary view in vertical section showing an end Wall of the mill with a cap closing a discharge opening therein, the mill being in operat ing condition; and

FIG. 6 is an enlarged fragmentary view of the same end wall with the discharge mechanism in position.

In the following detailed description, and the drawing, like reference characters indicate like parts.

In FIGS. 1 and 2 is shown, a pulverizing mill 10 which is rotatably mounted on base frames 11 and 11a. mill includes a cylindrical body 12 containinga number of pulverizing units or bars 13 (FIG. 1), only one of which is shown. The body 12 is formed with an opening 14 through which material can be charged for filling the mill. A closure member 15 is removably secured to the wall of the body 12 by appropriate securing members, not shown. The closure member 15 may be removed during filling.

Upright end Walls '16 and 17 are secured to opposite ends of the body 12. A trunnion 18 is attached to the end wall 16 and is rotatably mounted in a bearing 19. The bearing 19 is carried by a bearing support 20 mounted on the base frame 11a. An annular ring or rail 22 is mounted on the outer face of the cylindrical body 12 adjacent to the end Wall 17. The rail 22 engages a pair of spaced rollers 23 and 23a (FIG. 2) which are carried by bearing members 24 and 24a respectively.

The.

' The bearing members 24 and 24a are mounted on the base frame 11.

A ring gear 25 (FIG. 1) is attached to the end wall 16 and meshes with a driving pinion 26 carried by a shaft 27. The shaft 27 is driven by an appropriate power source (not shown in detail).

Attached to the end wall 17 are diametrically opposed outwardly extending housings 3i) and 31. The housing 39 includes an outer end wall 32 and opposite side walls 33, only one of which is shown, forming a hollow chamber 34- for receiving pulverized material from the interior of the body 12. The outer end of the housing 30 has an outer wall 35 which is connected with the walls 32 and 33 and with the outside of the body 12. An opening 37 in the wall of the body 12forms a passage through which pulverized material from the interior of the mill body can pass into the housing 39 when the housing 30 is in its lowermost position. The inner end of the housing 3% can be closed by a door or valve 39. An opening 41 in the end wall 17 permits pulverized material in the housing 30 to flow back into the interior of the body 12 when the housing 30 is at its highest position and the door 39 is closed. As shown, when the housing 30 is in its upper position, and the door 39 is closed, the door 39 slopes downwardly and toward the wall 17 to direct ma terial in the housing into the mill body. 7

The housing 31 is similar in every-detail to the housing 36. An opening 12 in the wall of the body 12 permits pulverized material from the interior of the body 12 to enter the housing 31. A door 43 is adapted to close the inner end of the housing 31. An opening 44 in the end wall 17 permits pulverized material in the housing 31 to flow back into the interior of the body when the housing 31 is at its highest position and the door 43 is closed.

As shown in FIGS. 5 and 6, the end wall 17 is provided with a central opening 44 in which a plate 46-is mounted. The plate 46 carries a cone 47 which faces the housings 3t) and 31. When the door 39 of the housing 30 is opened (FIG. 6), pulverized material from the housing 3i) can fall through an opening 48 at the inner end of the housing 30 and against the cone 47 to be discharged outwardly thereby. Similarly, pulverized material from the housing 31 is directed outwardly when the housing 31 is in the upper position and the door 43 is open.

An inner housing 51 is mounted on and spans inner ends of the housings 30 andfil. The inner housing 51 includes an annular plate 52 attached to extensions 53 and 53a .of the

housings

30 and 31, respectively. A center opening 54 in the plate 52 receives an annular, dogcarrying ring 54a. The ring 54a carries a plurality of dogs 55. When the mill is in operation, the dogs 55 engage and hold a cover plate 56 (FIG. 5) in position closing the opening 554. in the ring 540. When the mill is to be unloaded, the dogs 55 are released and the cover plate 55 is removed.

When the mill is to be unloaded, an unloading assembly 57 is moved into position as shown in FIGS. 1 and 2. V

The assembly 57 includes a hollow discharge chute 58 on a track 63. The upper end of the chute 58 is provided with a flange 6 to which a stationary bearing assembly 66 (FIG. 3) is attached. The stationary bearing assembly 66 supports anti-friction bearings 67 in which an annular rotatable member 68 is mounted. A labyrinth seal 69 is provided between the rotatable member 68 and the bearing 67 to segregate pulverized material from the hearing 67. The rotatable member 68 is provided with an annular flange 71, which as shown in FIG. 6, can be engaged by the dogs 55 to hold the rotatable member 68 in communication with the interior of the inner housing 51.

When the rotatable member 68 is in this position, the

doors 39 43 can be opened to permit discharge of material from the interior of the mill. The rotatable member 68 rotates with the mill while the discharge chute 58 remains stationary.

During the discharge operation, pulverized material from the interior of the mill flows through the

openings

37 and 42 into the

housings

30 and 31, respectively (see FIG. 1), then through the opening 43 (FIG. 6) at the inner end of the housing 30 and through a similar opening 72 at the inner end of the housing 31, through the inner housing 51, and into the interior of the rotatable member 68. The member 68 rotates with the mill. A gasket 73 prevents loss of pulverized material as it passes from the inner housing 51 into the rotatable member 68. As shown most clearly in FIGS. 3 and 4,

blades

74 and 76 are attached to the inside of the rotatable member 58 and rotate therewith. The blades cause the pulverized material to travel along the rotatable member to the left as shown in FIG. 4, into the discharge chute Extensions 74a and 76a on the blades 74 and '76, respectively, sweep an upper end portion 76b of' the discharge chute 53. Adjacent the entrance to the discharge chute 58 is mounted a screen 77. The screen 77 is mounted in a frame 78, which is held in place inside the discharge chute by pins 79, which enter loops 80 attached to the frame 7 8. The pulverized material is urged through the screen by a wiper blade 81, which may be of rubber or the like. The blade 81 is mounted between metal plates 82 and 83 (FIG. 3) which are attached to and turn with the rotatable member 68.

The pulverized material falis downwardly through the discharge chute 58 to a receptacle or drum 84 (FIG. 1). A valve 86 is provided inside the discharge chute to prevent flow of pulverized material therethrough while a drum is being mounted or removed. A handle 86a can be swung from the full line position of FIG. 1 to the dotdashline position to open the valve 86. At the lower end of the discharge chute is mounted a drum head assembly 87 which overlies the upper end of the drum. A gasket 88 inside the drum head assembly 87 is engaged by the upper edge of the drum to prevent loss of pulverized material between the discharge chute and the drum. The drum can be held in place beneath the discharge chute with the gasket 88 engaging the upper end of the drum by appropriate supports 89, only one of which is shown.

The doors of the housing are operated by hand wheels 91 and 92 (FIG. 2). The hand wheel 91 operates gears {not shown) inside a gear box 93 to turn a shaft 94. Similarly, the hand wheel92. operates gears (not shown) in a gear box 96 to turn shaft 97. As shown in FIGS. 5 and 6, the

doors

39 and 43 are mounted on the

shafts

97 and 94, respectively. Thus, the

doors

39 and 43 can be I opened while the unloading assembly is in place by turning the hand wheels 92 and 91, respectively.

When the pulverized material in the-mill has been unloaded, the

doors

39 and 43 are closed, the dogs 55 are released so that the discharge chute can be removed, and the cover 56 (FIG. 5) is replaced. Then the mill can be loaded again. for another run. 7

The use of the unloading assembly shown and described above makes possible unloading of the mill without loss of pulverized material during the unloading operation.

The machine and unloading device described above and illustrated in the drawings are subject to structural modification without departing from the spirit and scope ;of the appended claims.

between the housing and the interior of the body adjacent said inwardly directed opening for returning the pulverized material to the mill when the door is closed, a discharge assembly, said discharge assembly including a rotatable member, a discharge chute in communication with the rotatable member, and bearing and sealing means between the rotatable member and the discharge chute, means for attaching the rotatable member to the body to rotate therewith in communication with said discharge opening, and means externally of the housing for opening the door to permit pulverized material from the housing to flow through said inwardly directed opening into the rotatable member to be discharged through the discharge chute.

2. In combination, a pulverizing mill including a rotatable hollow body having an upright end wall, a hollow housing attached to said end wall, there being a passageway between the interior of the body and the housing through which pulverized material from the body enters the housing at the periphery of the body, there being a discharge opening in the housing, a discharge assembly, said discharge assembly including a hollow rotatable member, a hollow discharge chute in communication with the rotatable member, and bearing and sealing means between the rotatable member and the discharge chute, said bearing means comprising races mounted on the rotatable member and on the discharge chute, and rolling bearing members between said races, said sealing means being disposed between said bearing means and the hollow interior of said rotatable member and discharge chute, whereby said discharge chuteis supported in relation to said rotating member to maintain sealing cooperation ofsaid sealing means with said rotatable member and said discharge chute, and means for attaching the rotatable member to the body to rotate therewith in communication with said discharge opening to permit pulverized material from the housing to flow through said discharge opening into the rotatable member to be dischanged through thedischarge chute.

3. In combination, a pulverizing mill including a rotatable hollow body having an upright end wall, a hollow housing attached to said end wall, there being a passageway between the interior of the body and the housing at the periphery of the body through which pulverized 'material from the body enters the housing, there being a discharge opening in the housing spaced radially inwardly of the periphery of the body, the discharge opening facing inwardly, a door for closing said discharge opening, there being a second opening between the housing and the interior of the body adjacent said discharge opening for returning pulverized material to the mill when the door is closed, a discharge assembly, said discharge assembly including a rotatable member, a disto direct the returning pulverized material into said second opening.

4. In combination, a pulverizing mill including a rotatable hollow body having an upright end wall, a pair of opposed hollow housings attached to said end wall, there being passageways between the interior of the body and the housings at the periphery of the body, there being an inwardly directed discharge opening in each of the housings, a door for closing each of said discharge openings, there being a second opening between each of the housings and the interior of the body adjacent the discharge opening for returning pulverized material. to the mill when the doors are closed, there being an inner conduit mounted on the body in communication with the dischange openings of the housings, a discharge assembly, said discharge assembly including a rotatable member, a discharge chute in communication with the rotatable member, and bearing and sealing means between the rotatable member and the discharge chute; means for attaching the rotatable member to the inner conduit to rotate with the body in communication with said discharge openings, means externally of the housings for opening the doors to permit pulverized material from the housings to flow through said inwardly directed opening into the inner conduit, means inside the conduit for directing the pulverized material into the rotatable member,

UNITED STATES PATENTS 1,753,685 Bodenstein Apr. 8, 1930 2,185,960 Vogel-Jorgensen Jan. 2, 1940 2,367,585 Huszar Jan. 16, 1945 2,429,627 Huszar Oct. 28, 1947 2,815,176 Bodlaender Dec. 3, 1957