Jan. 14, 1947. J. |_. HIGGINS 2,414,150 PNEUMATIC CONVEYER Filed Feb. 15, 1945 via: “2/3 "33 ' 25 79 '23 ' ‘ ' Immyroa ' v65”, .5 _ féggé?S BY - Patented Jan. 14, 1947 UNITED STATES PATENT OFFICE 2,414,150 PNEUMATIC CQNVEYER _ 'é‘ohnL. Higgins, Chicago, Ill. Appiication February 15, 1945, Serial No. 578,056 4 Claims. (Cl. 302-62) 1 2 This invention relates to pneumatic conveyer apparatus and will be described as applied to an ventional type of receiver wherein'the ashes are led into the receiver in a tangential manner as is well understood in the art. Under the receiver i2 is the conventional conical hopper tank l3 which at times is closed by a swinging door I4 abutting inclined opening in a cupola inlet ash conveyer apparatus such as used by large ‘ steam power plants. However, it will be'appre ciated that the invention has application to other pneumatic conveyer apparatus wherein similar problems are encountered and continuous, con veyor action is desired. iii of another coacting bin hopper tank It. The bin hopper tank it has a conventional swinging In many pneumatic ash conveys-rs such as used discharge gate’ H. which may be arranged to dis by power plants, the ashes must be taken from 1O charge directly into a dump car, storage tank, the ash pits located under the boilers to receiver or it may be arranged to connect with a sluice tan-ks mounted at considerable heights at dis pipe to carry ashes into a convenient dump. On tant points from the power plants, where the top of the closed bin to is an upstanding pipe l9 ashes may be disposed of by gravity into dump connected to a conventional Venturi pipe 20 cars on a railroad siding or sluiccd through a 15 which in‘ turn is connected to a tangential pipe discharge line into a dump. This arrangement 2! leading into a dust separator 22. The dust necessitates long conveyer pipe lines extending upwardly toward the receiver. separator is emptied in a conventional manner and then the operation resumes. When the vac- ‘ uum, is shut o? for this reason, the ash in the ceiver 52 which draws ashes through the lines‘ I10 and H and deposits them‘ in the“ conical hopper tank 23 of the‘ receiver ttancl" through the door through the pipe 23. A steam pipe 24 connects The conveyer apparatus is used‘ periodically to the primary injector chamber 25 having noz when the boiler room helper or ash man is in es 26 coacting with the venturi 2!). When steam structed to empty the ash pit. In the conven is permitted to enter the chamber 25 by means tional form of pneumatic conveyor apparatus uti of an electrically controlled valve 21, which may‘ lizing a single receiver tank and vacuum system, be located at'any desirable location, the jets of the vacuum system operates on an “on cycle” of steam from the nozzles 26 coacting‘with the ven about two minutes and an “off cycle” of one min 25 turi 2% cause a suction in the bin 16 which closes ute, in order to provide a time interval for re the spring. opened valve to, which is ‘normally moving ashes in the receiver hopper tank which open to provide a vent to the atmosphere, and is under vacuum when being ?lled. During the the suction therefrom is transmitted through the off time interval, this receiver hopper is emptied. swinging door it to create a suction in there upwardly extending conveyer line drops down wardly and packs in the pipe making resumption of the ash flow difficult and wasting the work already expended on the ashes. This di?iculty “ is augmented by the continued piling of ashes in pipe lines except that the receiver l2 has been separated from the bin it by the hopper tank I3, the inlet opening of the pipe line if the ash man continues his labors when the vacuum is shut oil’. It is the particular object of the present in vention to avoid the dimculties of the “oiT and on” system of operation and to provide means whereby the continuous operation of the pneu matic conveyor is permitted. Other objects and bene?ts will be disclosed in the following desc ions and rawing in which: When this pneumatic removal of ashes has con tinued for su?icient time to nearly ?ll the bin IS, the electrically controlled valve 21 is shut o? au tomatically through the automatic time switch 81%, thus stopping the ?ow of steam through the venturi 2e, and before this how of steam is com pletely stopped, another electrically controlled - Fig, l is an elevation view partly in section of the receiver-separator apparatus employing the invention; and Fig, 2 is a top plan view thereof. Now referring to the drawing: I designate, by the numeral it in dash lines, the course of the incoming ash line which, of course. will start at a level far below the receiver apparatus, The nu meral ! E designates the tangential inlet pipe of this ash line to the receiver i2. This is a con :4 into the bin tank it. Thus far the use of the venturi ‘it to create a suction in the lines Hi and H is a conventional means to convey ashes in valve 28 in the pipe line 29 connected. to the supply line 24, is automatically opened by the switch 34 and electrical connections 35 and the steam emerging from this line 29 through the Ci A v nozzle 39 coacting with another venturi 3| con tinues to create suction in the receiver I2 ‘through the pipe 32. When this suction is applied through the pipe 32 to the receiver E2, the suction thus created closes the swinging door Hi and the ashes from the lines it and H are deposited in the hopper tank I3 of the receiver it. During this 2,414,150 4 3 to, means for closing said communication, means ‘ period of time, the ashes in the bin tank It are connected with the discharge chamber for creat ing suction in said receiving and discharge cham controlled valve t8, then valve 28 is shut 01f, bers for sucking material into the receiving the valve 2‘! opened, and the Venturi 20 picks up the vacuum load to thus continuously draw ashes O1 chamber for discharge therefrom into the dis charge chamber, and means for creating suction through the lines In and II. in the receiving chamber upon closing of the Thus I avoid the disadvantage of the ashes communication between the chambers to con falling back in lines Ill and II, save the energy tinue the supply of material to the receiving created by the inertia of the ashes in these lines, discharged by gravity upon release of the spring and remove ashes continuously. When the vacu 10 chamber. I 3. In a conveyer of the character described, the combination of receiving and discharge cham um in the receiver l2 created by the Venturi 25] is transmitted through the pipe 32 to the Venturi 3|, the hinged valve 33 on the end of the Venturi 3| closes and e?ectively cuts off the connection between the venturi 20 and 3|. By this arrange ment, it will be appreciated that I have combined dual Venturi operations to avoid the difficulties and disadvantages when a single venturi and re bers having means of communication therebe tween and adapted for the passage of material from said receiving chamber to said discharge chamber, said receiving chamber being adapted to be connected with a fluid conduit for supply of material thereto, means for closing said com munication therebetween, dual suction devices ceiver is used and provide a continuous ash re moval conveyer. _ 20 one of which is connected with the discharge chamber for creating suction therein and caus Having thus described my invention, I now ing material to be drawn into the receiving cham claim as new? ber and discharged therefrom into the discharge 1. In a pneumatic ash conveyer, a conveyer chamber, and the other suction device being con pipe line from an ash pit extending upwardly, a hopper bin tank having a swinging discharge 25 nected with, the receiving chamber and having means for automatically creating suction therein gate mounted at a height considerably above the upon the closure ofcommunication between the ash pit, a receiver attached to the conveyer pipe chambers to continue the supply of material to having a dump hopper and swinging discharge said receiving chamber while the material is be gate mounted above the bin tank with the dump ing withdrawn from the discharge chamber. hopper arranged to discharge into the bin tank, 4. In a conveyer of the character described, a dual Venturi suction device mounted on the the combination of a hopper bin tank having a bin tank with one suction device arranged to swinging discharge gate, a receiver adapted to be create suction in the receiver, the arrangement of the suction connections and the swinging dis connected with a ?uid conduit for supply of ma terial thereto, said receiver having a dump hop charge gates providing means to draw ashes per and a swinging discharge gate and mounted above the bin tank and arranged to discharge through the receiver into the bin tank with one of the suction devices and to draw ashes through into said tank, dual Venturi suction devices con nected with the bin tank with one suction device the other suction device, and means to control arranged to creat suction in the receiver, the ar the operation of the two suction devices to permit 40 rangement of the suction connections and the dumpingof the ashes in the bin while continu swinging discharge gates providing means to draw ing to draw ashes from the conveyer line into material through the receiver into the bin tank the receiver hopper, thereby providing a continu by the action of one'of the suction devices and ous ash conveying system. to draw material into the receiver to the discharge the receiver and. into the receiver hopper by 43 .2. Ina conveyer of the character described, the combination of receiving and discharge chambers having means of communication therebetween adapted for the discharge of material from said re ceiving chamber into said discharge chamber, said , gate in closed position by the other suction de vice, and means for controlling the operation of the suction devices to permit dumping of, the material in the tank while continuing to draw receiving chamber being adapted to be connected with a ?uid conduit for supply of material there tinuous manner. material into the receiver substantially in a con JOHN L. HIGGINS.