US2032337A - Conveying pulverulent material - Google Patents

Description

1936- I M. VOGEL-JORGENSEN 2,032,337

CONVEYING PULVERULENT MATERIAL Filed June 22, 1935 Patented Feb. 25, 1936 UNITED. STATES CONVEYING PUIJVERULENT MATERIAL Mikael Vogel-Jorgensem Copenhagen, Denmark, assignor to F. L. Smldth & 00., New York, N.-Y., a corporation of New Jersey Application June 22, 1935, Serial No.'27,87'l

3 In Great Britain July 6, 19 34 Claims. (01. 302-36) In Letters Patent of the United States No. 1,937,040, granted November 28,1933 to the assignee herein upon the application of the present applicant, there is shown and described an apparatus 5 for the conveying of pulverulent or granular material which in the mass is more or less fluent, such as cement raw meal, cement, pulverized coal and the like, in which a fluid under pressure, such as compressed air, is relied upon as the means by which movement'of the material throughaconduit is effected. When the materialto be so conveyed is taken directly from the manufacturing apparatus or from a container in which it is stored and is fed into the conveying conduit there is a tendency oi the compressed air or other motive fluid to escape back throughthe feeding mechanism. In the apparatus shown in said patent it was sought to prevent such escape of air or other fluid by compacting the material in the path of such possible escape of the air. I The apparatus of the patent is effective to a degree in reducing the escape of air but for the handling of some classes of material it'has been'i'ound desirable to provide means wherebythe escape otair can be more effectivels prevented; The apparatus of thepresentinvention is generally simliar'to that shown in the patent, although modified in form, a valve or valves being provided in relation to the other parts of the apparatus and relied upon to prevent 30. the escape of air in place of the means for compacting the material. Such valve, which may have diiterent forms, yields to permit passage of the material from the rotating body into the chamber of the housing into which the motive fluid is admitted to provide the fluid pressure by which the material is moved on through the connected conveyingconduit and closes upon the rotating hollow body when the pressure within the housing exceeds, the pressure developed'by the material under the influence of centrifugal force.

In the drawing, ,in which several different e'mbodiments of the inventionare illustrated- Figure 1 is a view in longitudinal, central section of one embodiment of the invention, a worm conveyor being shown asa means to supply the material from the hopper to the hollow rotating body. 7

Figure 2 is asimilar view of a diflferent embodiment of 'the invention in which the movement of sufliciently represented by the Figure 4 is a view in transverse section on the. plane indicated by the broken line 4-4 of Figure 3 a Figure 5 is a view generally similar to Figure 3,

but showing a. slightly diflerent form of valve. .5

V In the 'form of apparatus shown in Figure 1 the housing 20, somewhat lenticular in axial section and generallycircular in transverse ,section,

has connected thereto at one point aconduitl through which the material is conveyed from the 10 housing-- to the point of deposit. At another point of the housing there is connected the supply of compressed air or other fluid under pressure pipe 2.' The material to be conveyed is in this instance assumed 15 to be placed in a hopper 4 from which it is fed by a worm. conveyor 3 to the interior of a hollow rotary body 5, lenticularin shape, having at one side a. dished wall 6 and at the other side a plane wall I. In this: embodiment of the invention, an 9 I annular valve 8, of rubber or other flexible material, is secured at its inner edge to the wall I and may bear, at its free outer edge, against the wall 6 of the rotating hollow body. Inthis instance the worm conveyor 3-ls shown as rotated through a pulley 9 and the hollow body 5 is shown as carried by a shaft Ill yvhich maybe rotated through a pulley II). It be understood that, although the valve 8 may hangloosely when the apparatus is at rest, it will be caused by rapid rotation of the hollow body to which it is secured to stand at right angles thereto and that its outer edge will then lie in close contact with the lip of the wall 6 of the hollow body. It will also be understood that thepressure oi the motive fluid within the housing 20 presses the valve against the wall 6 of the hollow body and efiectually prevents the escape of air from the chamber of the housing 20 into the hollow body and so prevents the escape of the air through the feed device.-

Under the-influence of the centrifugal force developed by the rotation of the hollow body the material within the hollow body will be caused to a move outward between the valve 8 and the wall 6 into the chamber of the housing 20 from which it will be caused to move'by the pressure of the compressed air within such chamber outwardthrough the conveying conduit l. Packing glands I l and I! may be provided as shown.

In the form of the apparatus shown in Figure 2 the housing 20, generally similar in shape to the housing shown inFigure 1, has connected thereto a conveying conduit l for the delivery of the material and a source of air under pressure, indicated at 2. In this instance, the rotating hollow body 5* is generally shaped like that shown in Figure 1, having a dished wall 6 and at the other side a wall 1'. The material in this instance is fed to the interior of the hollow rotating body.

there is provided a transverse wall or partition i4 to prevent the material being drawn into the hollow shaft i5 through the port i6 which communicates with the interior of the pipe IS. The

partition I may also be provided with vanes i1 to assist in throwing the material which passes from the end of the pipe i3 outward into the hollow body under the influence of the centrifugal force developed by the rotation of the body. In this instance the valve 8 may be of the same general character as that provided for the construction shown in Figure 1, being somewhat narrower by reason of the greater diameter of the fixed wall 1, but bearing at its outer edge, as before, against the wall ii" at or near its edge. The operation ofthis form of apparatus is the same as that already described with respect to Figure 1 and need not be further explained herein.

While in the construction shown in Figures 3 and g the hollow body 5* is rotated through the shaft Ill" and is connected through its hollow hub 5 with the source of supply of the material it is shown in this instance as formed with four radiating hollow arms l8 extended from the central space, each of such arms being shown as provided at its end with a rigid valve ll pivoted at 20 and having a counterweight II to control its action. It will be understood that the rotating hollow body is placed within a suitably shaped housing which it is not necessary to show' since it functions in the same manner as does the housing shown in Figures 1 and 2.

The construction of the rotating hollow body 5 shown in Figure 5, is substantially the same as that of the rotating hollow body shown in Figures 3 and 4, mounted ona rotating shaft ill and communicating with the source of supply of material through the hollow hub 5. In this instance each valve 22 is shown as shaped to coact with the end of the arm iii to which it is applied, the

1 valve being pivotally mounted, as at 20, and provided with an adjustable counterweight 2 I The valves 22 are shaped as shown for the purpose of facilitating the distribution of the material as it being drawn into the hollow shaft.

passes from the hollow rotating body into the chamber of the housing within which, as before, the hollow rotating body is placed.

It will be understood that various changes in details of construction and arrangement can be made to suit. difierent conditions of use and, except as pointed out in the accompanying claims, the invention is not restricted to any of the particular constructions shown and described herein.

I claim as my invention: 1. In an apparatus for conveying pulverulent material the combination of a housing, a con veying conduit connected to the housing, means to supply fluid under pressure to the housing, a hollow body mounted within the housing, means to rotate the hollow body, means to supply the material to the hollow body at the central portion thereof, and a valve applied at the outer edge of the hollow body andadapted to yield outwardly under the influence of the pressure developed by centrifugal .actionron the material within the hollow body and to be moved to closed position by pressure in the chamber of the hollow body.

2. In an apparatus for conveying pulverulent material, the combination of a housing, a conveying conduit connected to the housing, means to supply fluid under pressure to the housing, a hollow body mounted within the housing and having opposite walls, -a valve carried by one' of the walls and adapted to cooperate with the other wall to prevent the escape of air from the chamber of the housing, means to rotate the hollow body, and means to supply material to the hollow body at the central portion thereof.

low shaft communicating with the interior of the hollow body and in which a pressure diflerential is maintained, and a transverse wall is placed within the hollow body to prevent the material 4. An apparatus as described in claim 1, and

w in which an annular space is left between the edges of the two walls and an annular flexible valve is secured at its inner edge to one of the walls to cooperate at its outer edge with the other of the walls. 1

5. An apparatus as described in claim 1, and in which the hollow body is formed with radiating hollow arms with openings at their outer ends and in which valves yielding outwardly to pressure within the hollow, body and inwardly to pressure within the chamber of the housing are provided at the ends of the hollow arms.

" MIKAEL VOGEL-JORGENSEN.

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