Патент USA US2039938код для вставки
May 5, 1936-' E. w. SCHUL-rzVV ~ 2,039,938VV , SANDBLAST NOZZLE Filed Dec. 225, 195531y` Il', Patented May 5, 1936 ` ’ i UNITED STATES PATENT OFFICE, 2,039,938 SANDBLAST NOZZLE Frederick W. Schultz, Wichita, Kans. Application December 23, 1935, Serial No. 55,826 6 Claims. (Cl. 51--11) My invention relates to a sand blast nozzle adapted to use a limited amount of air and sand in conjunction with a predetermined amount of Water or moisture whereby the sanding opera5'- tions may be accomplished in a minimum period of time, wliile the objectionable hazard encoun- tered in sand blasting operations will be materially reduced, if not entirely eliminated. The invention has for its object the construcl0 tion wherein the sand will be broken up into finer particles or grains and a proper mixing of the moisture or water with said sand accomplished before the sand is discharged. Another object of my invention is to provide a, i5 nozzle of the type in question wherein the wear receiving portions of the discharge end or mouth Of the nozzle are removably secured in place in order that renewal or replacement of such parts may be accomplished. '20 The objects and advantages of my invention will shown but which may be of the type shown in my previous application referred to. The other or discharge end of the casing is more or less flattened out so as to provide the two tapering sides Il, Il as shown in Figure 1, While the por- 5 tions intermediate of these tapering sides are spread or built out laterally to provide the lat erally disposed ear or wing portions I8, I8, see Figure 3. 'I‘hat is to say, there are two wing portions I8 10 on each side which, at the end and for a short distance removed from the end, are spaced from each other to receive a pair of hardened steel plates I9 0f predetermined Width and OÍ length t0 extend across the outlet of the nozzle to- form the _15 mouth or nozzle tip; and these plates are main tained in spaced parallel relation with each other by Suitable filter Plates 0r Spacers 20. The 60n struction of these plates I9 and 20 is shown in de tail in Figures 5 and 6. be readily comprehended from the following detailed description of the embodiment disclosed in the accompanying drawing, Wherein:-- The nller plates 2U, like plates I9, are oi hardened steel; the Plates 20 being arranged in termediate of the ends of the two plates IS at l Figure 1 is a side elevation of my improved noz25 zle with a portion of the side wall broken away to opposite sides of the discharge end or mouth of the nozzle and are comparatively narrow so as to disclose interior construction. 20 5 provide an elongated substantially straight lined Figure 2 is a longitudinal sectional view taken Substantially 0n the line 2-2 0f Figure 1, aS 30 viewed by the arrows. _ _ _Figure 3 1s an end elevation as Vlewcd from the discharge end or mouth. Figure 4 is a cross sectional view taken sub- stantiallyon the line 4-4 of Figure 2, looking in 35 'ßhîTdlfeCtàOn 0f âhî alrfows- ï . _ f A Í narrow discharge opening 2l. The outer ends of the wing portions I8, the ends of the tip plates I9 and the spacer or ñller 3o piates 2n are au apertured to receive bolts z2, se that when the nuts 23 are screwed up on the bolts 22 the ears or Wing portions will be drawn into tight relation with the tip plates I9 and the latter drawn into tighter relation with the nner 35 the lälslâharëea'enâ aglaïgsrssâghlî gâïi’oïl älfèîgn plates 20; the ends of the tip plates I9 and of the Y spacer or filler plates 20 closing the spacing at the aWFa‘iBg-ure 6 is a similar view of one of the filler or sides. of the »discharge motlth of me nozzle inter' spacer p1ates_ mediate of the ears or wing portions .I8 so that The Specific embodiment of my invention’ as ldisclosed 'in the drawing, involves certain im- air or sand cannot find egress at the sides of the 40 nozzle'mouth' _ provements on the type of sand blast nozzle disclosed in my copendmg application serial Num_ 45 ber 19,371 anais espeeiaiiy adapted for send biesting surfaces where> scoring would be objeetionable and Where the element of time and material In Order to enable a' p_l‘oper Shaping 0f the neZ zle body and also provide access to the interior dunne »constructiva the Opposite sides in align- 45 40 ' is 3,150 eSSentiaL v ment with the spacing between the ears I8 is slit to receive the radially disposed webs 24 whose in ner ends are intimately secured or welded to the The body of the nozzle preferably consists of an 50 elongated and somewhat cylindrical casing I5 Of‘prearranged and convenient proportions and reduced somewhat at one end to provide the tubular nipple or collar portion I6 which is preferably internally threaded to receive the usual hose Cellar 01’ Pipe Coupling member 25 arranged con eentrieaiiy Within the tubular body |550 This coupling 25 is interiorly threaded to re ceìve the externally threaded end 0f a Short pipe or tubular member 26 and to maintain the latter in concentric relation with the casing I5 and to 55 gripping bushingV and inlet nozzle which are >not provide a comparatively large annular passage 55 2 2,039,938 about the member 26, as clearly shown in Figures 2 and 4. The opposite end of the co-upling is provided with a steel plug 21 which is tightly driven into Y,the coupling and welded in place and the forward or inner face of the plug 2l is preferably pro vided With a'hardened bronze covering, indicated at 28, adapted to withstand greater wear; while the short tubular member or nipple 26 is prefer ably case hardened to withstand the action of the incoming sand introduced through the nipple end and a special ñne sand would have to be pre pared; my improved nozzle making it possible to sand comparatively delicate surfaces. In practice it is found that most of the wear is encountered by the plates at the discharge ori ñce and with my improved construction these plates when worn can be readily removed and re placed thus enhancing the life of the nozzle and consequently materially reducing replacement cost. 10 With the comparatively wide plates I9 the noz I6 by means of a suitable nozzle asfor example zle is provided with a narrow straight throat or shown in my co-pending application. mouth which causes the sand to discharge in a In operation the tubular member 26, Whose Y substantially straight line and withi a strong strik 15 open end is in alignment with the incoming sand under pressure, is adapted to receive the sand and to ñll up, thereby providing an impact re ceiving pocket; the sand after overflowing being forced around the tubular member 26 and past 20 the webs 24, toward the discharge end’ of the nozzle. 1 With the plates I9 extending a distance into the casingV I5 it is> apparent that a sand arrest ing pocket is provided above the upper plate and 25 beneath the lower plate when the nozzle is posi tioned as viewed in Figure 1. These pockets at the discharge- end like the concentric pocket 26 soon become ñlled with sand thereby providing a striking bed for the incoming stream of sand to strike against. The incoming sand is introduced directly in line with the open end of the tubular member 26, causing the sand to more or lessY combat itself and to set up a vigorous action which causes the sand to break 35 up into a very much finer state than when it entered the: nozzle. The turbulent action set up by the arresting pocket. member 26 ytends to choke the air and _to distribute the sandV equally through out the casing and- thus diminish its severity. 'I'he turbulent sand coming from the arresting pocket 26 has a> tendency to followthe sloping _ 15 It will be understood, of course, that the size of the discharge orifice may vary in keeping with the size of the main casing, a certain relation be ing preferable to obtain the sand action within the casing. 20 ' VThe construction shown and described is be lieved to be the best embodiment of my inven tion, but modifications are possible and may be made without departing from the spirit of my invention. 25 What I claim is: 1. A sand blast nozzle vof the character de scribed comprising an elongated casing having a sand and air inlet at one end and a discharge at the opposite end, the discharge end of the casing 30 being gradually reduced so as to taper on two oppositev sides and to flare outwardly on. two op posite sides and said flared sides slit for a prede termined distance to provide a pair of laterally disposed ears on both of said ñared sides; ilat 35 plates arranged in parallel spaced relation in said slits transversely of the casing with ther ends of said plates arranged between the ears and pro viding a straight line discharge orifice; means coaoting with said ears and with the ends of said 40 ñ'ce thereby'tending to somewhat further dimin plates whereby the wall of the casing is drawn into snug relation with said plates and the latter removablyheld in place; and means in thev cas ish'tlie‘striking force Aofthe discharging sand. passing through the casing is produced. wallsv of the casing and to set up somewhat of a cross ñre a short distance fromV the discharge ori 45 ing force.l ` The casing YI5 at a point’ preferably coincident with' an“ intermediate pa'rt of arresting pocket ' 26 is shown provided with' an L-n’ipple orv elbow tube 29 which is preferably'welded into ahole 50 in the casing I‘5"by'means'of"bronze as`A at 30. 'As `is apparent', water may thus be admitted into the casing l-5-at aVY point- intermediate of the ends of thearresting pocket-26 so that the water encounters the sand after» its breaking-up.. action in pocket 2.6;.the water being made` to commingle with the ñne sandpassing about the pocket 26, Y The air and sandgin addition to entraining the Y water tend to convert the water into a mist. With a proper regulation of the ingoing sand a 60 lesser amount of sand may be used and the moist ened'broke'n-up sand provides a somewhat faster cutting action than when dry. Furthermore, the water mist also eliminates the dust that other would result during a dry sanding operation; 65 This also permits sanding operations to be per formed within an enclosure. With my improved nozzle, if it is Ydesired to vwash any parts or ‘objects that-have been sanded, the inílowing sand stream may be shutoff and merely the air and water , allowed to enter thereby spraying nozzle. quickly providing a ' . It has been found in practice that the sand ing whereby a turbulence in. the sand-stream ` 2". A sand blast nozzle of'the character de scribed comprising a cylindricalcasing havingV a sand- and'air inlet at one end and a discharge at the opposite end, the discharge end being cól lapsed to provide two gradually tapering walls 50 and outwardly ñared spaced apart portions be tween the. tapered walls;` flat plates 'arranged in parallel Vspaced relation b'et'v’ve'enV said- Vilared spaced apartwall portions of the casing to' pro vide a straight line discharge oriñce, said- plates 55 extending into the nozzleso as to provide Vsand arresting pockets intermediate 'of the'pla‘tes and the sloping wall portions of the casing adapted to receive the sand in advance of its discharge; means whereby the plates are heldin place 'and 60 removably' securedv to the casing; `and means concentri’cally arranged' in the casing interme diate of its ends> and adapted to intercept the incoming sand. ' ~ ~ 3». A sand blast nozzle of the characterde 65 scribed comprising a cylindrical casing with an air and sand inlet at one end land ay discharge at the opposite end; a pair of spaced apart par allel plates ati the discharge end of the casing arranged toV provideY a narrow elongated outlet m nozzle;~ means whereby said plates are remov ably secured in place; a, sand arresting element is broken up so iine that the nozzle may be used for a great many purposes where the conven located concentrically in the casing intermedi tional method, of sanding wouldV be much slower stream passing through the casing is provided ate'of its ends _whereby a turbulence in the sand 2,039,938 and finer sand produced; and means whereby water may be introduced into the casing beyond the point of discharge of said sand arresting ele ment. 4. A sand blast nozzle of the character de scribed comprising a cylindrical casing having a sand and air inlet at one end and a discharge at the opposite end, two opposite sides at the dis charge end tapering toward each other and pro viding a discharge opening coextensive with the internal diameter of the casing, while the other two opposite sides of the casing are slit and formed to provide a pair of spaced apart wings on each side of the casing; matching plates ar ranged in the discharge end of the casing with their ends disposed between the spaced wings on opposite sides of the casing while the portions of the plates within the casing are in spaced re lation with the tapering sides of the casing to ' 20 provide sand arresting cavities; ñller plates be 25 and the plates are drawn into snug relation. 5. A sand blast nozzle of the character de tween the ends of the first mentioned plates to maintain the latter in prearranged spaced rela tion; and removable means whereby the wings scribed comprising a cylindrical casing having a sand and air inlet at one end and a discharge at the opposite end, two opposite sides of the casing tapering toward each other while the 30 other two sides flare outwardly and are slit to provide spaced apart wings, the casing interior at the flared sides being formed' to provide a discharge passage coextensive with the normal 3 internal diameter of the casing; a pair of plates arranged in the flared end of the casing with their ends disposed between the spaced apart wings while the main portions of the plates ex tend into the casing in spaced relation with the tapering sides of the casing to provide tapering cavities; means whereby the plates are held in prearranged spaced relation; means whereby the plates and said first mentioned means are re movably clamped between said wings; and 10 means whereby water may be introduced into the casing intermediate of its ends. 6. A sand blast nozzle of the character de scribed comprising an elongated casing provided with an inlet at one end and a discharge at the 15 opposite- end and having two opposite tapering sides terminating in a discharge opening coex tensive with the diameter of the casing and hav ing a pair of outwardly extending wings on each side of the casing with a slot-way therebetween; 20 a pair of flat plates arranged in the discharge opening with their ends disposed in the slot ways between the plates; means coacting with said wings and said plates for removably -clamp ing the plates in place; a sand stream arresting pocket substantially at the- longitudinal center of the. casing intermediate of its ends; and means whereby water may be introduced in the casing at a point intermediate of the forward open end of said pocket and the discharge open 30 ing of the casing. FREDERICK W. SCHULTZ.