US1369648A - Neumatic conveying mechanism - Google Patents

Description

narrar orrifcs.

GEORGE A. ernennen, or onnvniinivn eine.

.NEUMATIG CONVEYING MECHANISM.

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Specification of Letters Patent. Patented Fab. 2v2, 1921,

. .a I l Application tiled January 2, y19320. Serial ilo. 348,854.

To all whom t may concern.'

Be it known that I, GEORGE A. Ginsnmin, a citizen of Germany, residing at Cleveland, Chio, have invented certain new and use ful Improvements in Pneumaticl Conveying Mechanisms, of which the following is a specification.

The invention relates particularly l to mechanism for pneumatically conveying 'powdered or pulverized or granular material. Such-mechanism frequently includes a iiexible pipe or hose at the end of which is a nozzle which :is placed on or in the material to be conveyed. The material is drawn into the nozzle and through theipe. Frequently a plurality of such flexible receiving pipes are used in a single installation. When the distance the material is to bc conveyed .is not great it is possible, and sometimes convenient, to continue each receiving pipe to the place of deposit. Frequently, however', it is desirable and economical to attach a plurality of receiving pipes to a single dclivieiy pipe through which the mate rial may be delivered to the point of deposit. Suction is applied so as to tend to create a vacuum in the pipes and So draw the material to beconveyed through the receiving pipe and into and through the delivery pipe.

Where a plurality of streams of material come together at the point where the receiving pipes imite into the delivery pipe there is liability of a blockade or jamming of the material. More or less hard lum s may get caught at this point and be packet in tightly or with finer material. This has sometimes necessitated shutting down the pump creating the vacuum and disassembling the apparatus to remove the materialA blockuig the passage. One result of this has'been that it has frequently seemed economical to install long stretches ot individual delivery pipes for each individual receiving pipe rather than contemplate the delays and expensive operation necessary to clean away the frequently occurring blockades incident to the use ot a lsingle delivery pipe with a plurality of receiving pipes.

It is a purpose et my invention to provide a system involving a single delivery pipe supplied with a plurality of receiving pipes which willv not have the disadvantages above set out.

One form the invention may take is indicated in the accompanying drawings in which Figure'l is a. iront elevation of a.

the conveyed material.

joint betweeii'a; delivery pipe and a plurality of receiving pipes made in accordance with the invention ;l Fig. 2 is a transverse vertical section of a relieving valve and Fig. 3 is a top plan view of the relieving valve.

A delivery pipe 1 is preferably made of metal and rigidly held in place. Only the end of this pipe is shown but it will be understood that it Will extend any suitable distance to the point of'd'eppsit or storage of livery pipe two receiving pi es 2 are shown each provided With flexible ose portions 3 which are provided at their ends ywith nozzles (not shown) of any suitable form to be placed in or on the material to be conveyed. In an extension 4 of the delivery pipe 1 is a valve chamber 5 having within it a partial diaphragm 6 through which extends the stein 7 of a valve 8. The stem 7 is provided with a nut 9 to hold it from assing through the hole in the partial diaphragm land also ato adjust the distance between the valve 8 and the valve seat 10 which is formed at the' lower end of the valve chamber 5. The

valve stem 7 is prolonged beyond the valve l8 and carries a plurality of weights 1l.

'Ilie number and weiglitof the blocks 1l ma be varied at will to adapt` the valve for di erent conditions of operation. A. nut.12

is shown to hold the weights 11 in place on ntering the de-V the valve stem 7. When the apparatus is l not in use the Weights hold the nut 9 `close against the partial diaphragm 6 thereby causing the valve 8 to stayaway fromxthe valve seat l0. This position is shownlin Fig. 2. In operation a partial vacuum is created in the delivery pipe l thereby causing material to be sucked up through lthe receiving pipes 3. The vacuum' thus created is lnormally sufficient to overcome xthe weights 11 and cause the valve'S to be closed against its seat 10. l The material from the receiving pipes?)l enters the delivery pipe 1 frequently in great quantities and at hi h speed. Irequently the material. because in lumps or for other reasons arranges itself in such a way as to jam or block that pipe, land thus the passage of material may be impeded or sto ped. At this time the vacuum in the extension 4 of the delivery pipe '1 y will decrease and Will finally reach a' oint at which the weights 11 will overcome t e suction and.v

consequently force the'valve Stp open automatically from its seat 10. This will allow air at atmospheric pressure toenter'the dedelivery pipe, receiving pipes entering the vlivery pipe l et its point of junction with the extensions 2 of the receiving pipes 3. The

pressure thus exerted automatically on the materials-blockin the pipes will be suiiicientto fcrcethe jammed material through the delivery p`i e 1 thus setting the apparat'us into norma'action again at which time ,the renewed vacuum' in the extension 4 Will causenthe vaive8 to close against its seat 10 until `another block occurs or the operation of the apparatus is discontinued. It is thus possible to employ a plurality of receiving pipes for quickly conveying a large quantity of material in conjunction With a single delivery pipe and insure continuous eiiicient working of a relatively cheap installation.

The details of the mechanism shown and described are illustrative but are not essential to the invention.

I claim as my invention:

' 1. Inpneumatic conveying mechanism, a

delivery pipe, a plurality of receiving pipes entering the delivery pipe, and automatic means for relieving a block in the pipes.

.2. In pneumatic conveying mechanism, a

delivery pipe, and automatic relieving mech amsm at the `junction of the pipes.

3. In pneumatic conveying mechanism, a A

delivery plpe, receiving pipes entering the. delivery pipe, and automatic means for admitting atmospheric air at the junction of the pipes.

4. ln pneumatic conveying mechanism, a delivery pipe, receiving pipes meetingA the delivery pipe at an angle, a relief 'pipe between the receiving pipes, an air valve in the relief pipe and means on the valve to cause it'to open when the conveyed material blocksv junction of the receiving'and delivery delivery pipe at an angle, an airvvalve ,at

the junction of the receiving` and delivery 1 pipes, and Weights on the valve to cause itto open when the conve` ed material blocks. 55:

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