Патент USA US2124989код для вставки
July 26, 1938. J. E. SMITH 2,124,989 CEMENT SPRAY DEVICE Filed‘ March 12, 1936 3/ 29 2% , 30 ‘ 34 ' 0 2 , . INVENTO I, %4@ ‘f ATTORNEY Patented July 26, 1938 ilNiTED srares s-ArsNT caries 2,124,389 _ CEMENT SPRAY DEVICE John E. Smith, Los Angeles, Calif. Application March 12, 1936, Serial No. 68,361 11 Claims. My invention relates primarily to‘ a device for applying cementor like plastic materials in which the cement or the like is transported in a dry state through a hose and hydrated at the ‘5, point of a nozzle and then applied in a spray form, such devices being variously called “cement guns” etc, and its prime object is the provision of means, in such devices, whereby the ?uid being supplied to the stream of aggregates passing 10 through the nozzle may be maintained at a rela tively high pressure at least not lower'than the line pressure, while permitting the volume to be varied. Another object is to provide means of the 15 above character whereby the ?uid being com mingled with the stream of‘ aggregates will be caused to “fan out” or spread as it passes out of the jet into the nozzle, this “fanning out” or spreading being at right angles to the flow of the stream of aggregates, the result being a substantially perfect mixture of ?uid and ag gregates with a resultant uniform hydration. Heretofore in the use of so called “cement guns” etc., in applying cement and like plastic 25 materials, ?uid has been added to the stream of aggregates, passing through the nozzle, through a plurality of openings or jets positioned radi-. ally around the nozzle and angled in the direc~ tion of flow of the aggregates and, when it was 30 desired or found necessary to alter the proportion of ?uid and aggregates, the flow of .?uidwas increased or decreased by means of avalve- in the main supply. . a a This, of course, decreased or increased the pressure of the jets passing into the nozzle with the result that the ?uid, in the case of decreased pressure, would fail to penetrate su?‘iciently into the stream of aggregates to permit a thorough commingling, the result being that the outer 40 surface of the stream of aggregates would be too wet, and the inner portion too dry. In the use of my invention I provide means for varying the capacity or transverse area of the ‘jet openings as individual openings so that as the 45 ?uid supply is varied the transverse area or ca pacity of the individual jet openings is also varied and the pressure of the ?uid passing therethrough maintained or adjusted as desired and at the same time the ?uid as it passes out 50 of the outlets is caused to. “fan” or spread fan! wise transversely of the stream of ‘ aggregates. Other objects and advantages will appear here inafter and, While I have shown and will de scribe the preferred form of my invention, it 55 will be understood that I do .not limit. myself to (or. > 91-44) such preferred form but that various changes and adaptations may be made therein without de~ parting from the spirit of my invention. In the drawing accompanying and forming a part hereof: Fig. 1 is a side elevation of a cement gun constructed according-to my invention. Fig. 2 is a left hand elevation of Fig. 1. Fig. 3 is a central transverse section through 10 my improved ?uid control. Fig. 4 is a central vertical section through Fig. 3 and taken at right angles thereto. Fig. 5 is a detail of a portion of Fig. 3. Fig. 6 is a fragmentary detail of a modi?ed 15 form of my invention. Referring to the drawing my device comprises an outer housing 8 provided with an interior ?uid chamber 9. Projecting from the lower por tion of the housing 8, is an integral boss is through which is provided an opening it, inte~ 20 riorly screw threaded for connection to a street L i2 by means of which said chamber is con nected to. a ?uid supply pipe l3. A control valve (not shown) is inserted in the supply pipe line, the object of which will be obvious. ' 25 Provided in the opposite sides it and it of the housing 3 are openings l6 and ii, which open ings are concentric relatively to each other, and mounted at its ends in these openings it and ii, held positioned by any suitable or desired means, such as soldering, friction or otherwise, is the jet-opening ring or carrier is, in which are provided the radially extending jet openings 26}, of which I have shown eight, equally spaced, but any other number may be used as found necessary or advisable, and any desired spacing may also be used. Provided through the carrier 69 is a passage 2! through which the aggregates are forced during admixture with the ?uid. Mounted within the chamber 9 to snugly fit around the ring or carrier i9 is the jet adjust ing valve member 22, through which are provided jet openings 23 adapted to coincide with the openings 26 of the ring l9 and provide a con tinuous passage from within the chamber 9 to 45 the passage 2!. Extending upwardly from the» side of member 22 is an abutment 21!, and this abutment projects through an elongated open ing 25 in the wall of housing 8 and terminates at a short distance thereabove. Detachably ' mounted upon the housing 8 to inclose the elon gated opening 25 and the abutment Ell-is a closure cap 26, held positioned by screws or studs 2'! and nuts 28, soldering or the like being used if found necessary'or desirable to make the connection 2 2,124,989 or union therebetween watertight. Cap 26 is also provided with a removable closure plate 29. Pro vided in opposite ends of the cap 29 are bosses 33 and 3| and screw threadedly mounted in the Ul boss 30 is an adjusting screw 32, provided on its outer end with a hand wheel 33, a packing gland 34 being provided for insuring a ?uid tight connection between the projecting end of the screw 32 and the housing or cap 26. Screw threadedly mounted in the boss 3| is an adjust ing sleeve 35, provided on its outer end with a lock nut 36 by means of which said sleeve may be locked against movement relative to boss 3|. Projecting through the sleeve 35, concentric therewith and in screwthreaded engagement therewith is an elongated stop, member 31, the inner end of which acts to limit the rotative movement of the member 22 by means of the abutment 24. The other end of the stop mem ber 31 projects beyond the outer end of the sleeve 35 and is squared or other wise adapted for the reception of or engagement by a suit able tool for rotating the same. A look nut 38 is provided for the member 31 whereby the same may be locked against rela tive movement with sleeve 35. Coiled around the stop member 37 between the inner end of the sleeve 35 and the adjacent side of the abutment 24 is a coil spring 39 which normally acts to 30 hold the abutment 24 against the adjusting screw 32. While I have shown and described the jet openings 20 and 23 as being circular it will be understood that I do not intend to con?ne myself to any speci?c contour but that I may also use slitted apertures extending radially or trans versely or in any other manner desired or found advisable. (See Fig. 6.) In the operation of my device should it be de 40 sired to vary the area of the jet openings, the rotation of the adjusting screw 32 by means of the hand wheel 33 will rotate the jet adjusting valve member 22 and move its jet openings 23 into or out of register with the jet openings 20, according to whether it is desired to increase or decrease the area. Interiorly screw threaded extensions 40 and 4|, projecting from the sides of housing 8 and con centric with passage 2| provide means for con nection to the nozzle 42 of any suitable con struction and the aggregate supply pipe or tube 43. Having described my invention'what I claim is: 1. In a device of the character described a housing, having a ?uid chamber therein and a connection from said ?uid chamber to a ?uid supply, a detachable annulus rigidly mounted in said housing and having a central opening there through and a plurality of radially extending 60 ?uid passages connecting said central opening to said ?uid chamber, an adjusting member mounted in said ?uid chamber to surround said annulus and being provided with a plurality of radially extending fluid. openings there adapted 65 to register with the said ?rst ?uid passages, and means for rotating said adjusting member to bring the ?uid openings therein into or out of register with the ?uid passages of said annulus and restrict or increase the ?ow of ?uid there 70 through. 2. In a cement spray device, a housing having a passage therein for dry aggregates, a ?uid chamber in said housing and having a plurality of jet ori?ces opening into said passage, a valve' 75 member movable in said chamber for simul taneously varying the area of all of said jet ori?ces, and means operable exteriorly of said housing for so moving said valve member. 3. In a cement spray device, a housing having extending therethrough a passage for dry aggre gates, a ?uid chamber having jet ori?ces ar ranged to direct jets of ?uid under pressure into said passage, means for establishing con nection of said chamber with a source of ?uid under pressure, a valve member movable relative 10 to said ori?ces for simultaneously varying the area of said ori?ces, and means for moving said valve member. 4. In a cement spray device, a housing having extending therethrough a passage for dry aggre 15 gates, a ?uid chamber having jet ori?ces opening into said passage, means providing for connec tion of said chamber with a source of ?uid under pressure, a valve member having a plurality of openings adapted to register with and communi" 20 ‘cate said jet ori?ces with said chamber, and means for moving'said valve member to simul— taneously vary the volume of the ?uid jets. 5. In a cement spray device, a housing having a passage'for dry aggregates, a ?uid chamber lo 25 cated between the ends of and surrounding said passage and having ?uid jet ori?ces opening into said passage, means providing for connec tion of said chamber with a source of supply under pressure, means at opposite ends of said 30 housing and said passage therein providing for connection of the housing with a nozzle and a dry aggregate feed conduit, a rotary valve mem ber in said chamber and having openings which are adapted to register with said jet ori?ces and 35 to vary the ?uid volume of the jets, and means operable exteriorly of said housing for turning said valve member. 6. In a cement spray device, a housing having a passage through which dry aggregates are passed, a ?uid chamber adjacent said passage and having jet ori?ces arranged to discharge into said passage, a movable valve member having openings adapted to be brought into and out of registration with said ori?ces upon movement of 45 said valve, and means operable exteriorly of said housing for moving said valve. 7. In a cement spray device, a housing having a passage therethrough for dry aggregates, a ?uid chamber located between the ends of said 50 passage and including an annular wall which is removably mounted in said housing, said annular wall having a plurality of jet ori?ces arranged to discharge into said passage, an annular valve member surrounding and being rotatable relative 55 to said annular wall and having openings there in adapted to communicate the said ori?ces with the interior of said chamber, and means for ro tating said valve member. ' 8. In a cement spray device, a housing having 60 a passage for dry aggregates, a ?uid chamber in said housing, means providing for connection of said chamber with a source of ?uid under pressure, and means for directing jets of ?uid from said chamber into said passage including a 65 stationary member having ori?ces therein, a mov able member having openings adapted to es tablish communication of said ori?ces with said chamber, and means operable exteriorly of said housing for moving said movable member. 70 9. In a cement spray device, a housing having a passage for dry aggregates, a ?uid chamber in said housing, means providing for connection of said'chamber with a source of ?uid under pres sure, and means for directing jets of ?uid from 2,124,989 said chamber into said passage including a sta tionary member having ori?ces therein, a mov able member having openings adapted to estab lish communication of said ori?ces with said chamber; and means operable exteriorly of said housing for moving said movable member, said stationary member being removable through said passage. 10. A cement spray device comprising a hous 10 ing having a passage through which dry aggre gates are passed, a ?uid chamber adjacent said passage, adapted for connection with a source of ?uid under pressure and having a jet ori?ce for discharging ?uid into said passage, and means for varying the volume of the jet while maintain ing the normal ?uid chamber pressure of the ?uid passing therethrough comprising a valve 3 member movable relative to and cooperating with said ori?ce and means operable at will upon the exterior of said housing for adjusting said valve. 11. A cement spray device comprising a hous ing having a passage for dry aggregates, a fluid chamber adjacent to said passage having a jet ori?ce for discharging ?uid into said passage, means adapted for connecting said chamber with a source of ?uid under pressure and for maintain ing a substantially uniform pressure therein at least lower than the line pressure from said source, and means for maintaining a relatively high jet pressure while varying the volume of the jet including a valve associated with said ori?ce and valve adjusting means arranged for 15 actuation during cement spraying operations. JOHN E. SMITH.