US1562194A - Nozzle - Google Patents

Description

JOHN v.v

Patented Nov. 147, 192.5.

.UNITED STATES somma, or CHICAGO, ILLINOIS, AssIGNoR To CEMENT GUN CONSTRUC- TION CO., F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Nozzma.

Applicationmea February 1o, 1923. serial No. 618,2'10.

To all whom it may concern:

Be it known'that I, JOI-IN V. SCHARFE, a

citizen of the United States, residing at cially adaptable Chicago, in the county of Cook and State of gIllinois, have invented certain new and usecement gun, such as that disclosed in United States Letters Patent No. 991,814, granted to Carl E. Akeley, May 9, 1911, in the use of which sand and cement are mixed together and with water, at the time when they are projected from the end of the nozzle into the atmosphere and during the time when they are moving thru the atmosphere and at the point of application. In the'present invention I provide meanswithin the nozzle to effectuate the mixingy operation by causing the comminuted material to deviate from its normal axial course by taking lgenerally resultant lateral Apaths, on either side of the axis of the flowing stream and to causel alternate, acceleration and retardation of the stre-am 1n lts passage thru the nozzle, to cooperatively more' thoroughly intermingle the particles of colnminuted material and-to expose every particle thereof to more intimate contact with the4 associated water.

' Another object of the .invention is to provide an improved nozzle consisting of a plurality of cone-like hollow sections with like ends of adjacent sections connected together Dthereby forming alternately contracted and expanded openings and terminating with a contracted end, said sections arranged to be conveniently. separated for purpose of clean- Other objects and advantages will readily appear from a consideration of the specification when a taken in conjunction with the drawings forming a part hereof, wherein Fig. 1 shows an axial longitudinal central section. f

Fig.'2 is a transverse section taken on line 2-2 of Fig. 1. i"

In both views the same reference characters indicate corresponding parts.

The mventlon contemplates the use of a,

plurality of tapered sections, some of which for use with a so-.ca-lled are readily separable by, preferably, threaded connection and the nozzle terminating, preferably, for the purpose described, yin a contracted end so -that a stream projected therefrom, will iow at relatively high veloc-V ity or at a velocity higher than it is flowing when it is introduced into the nozzle.

In the drawing is a threaded fitting into which a two-section member 6 is secured by threaded connection, at 7 The member 6 consists in inte ral formation of two sec-- tions 8 and 9, jomed at their smaller ends at 10 to which point they converge, atl their smallest diameters, their larger diameters being at'their Outer terminal ends, respec tively.

Section 9 is connected by threaded means to anothertapered sectionf 11, at 12, with opening at 14;, about eight times the area of I s the opening at 15 and the area at 14 is about four times that of the opening at 16. This has given very good results.

The relative speed of the stream passing lthru the nozzle will be varied as it passes the points where the changes in, area occur, and these conditions uniformly prevail throughout the entire nozzle.

The more lponderable material carried in the stream will be bombarded from one side to the other owing to the converging walls, thus causing thorough mixing conditions.

rl `he,iitting 5 contains a 'ring 17 having forwardly projecting, spaced openings 18 communicating with an annular opening 19 into which water under pressure is admitted thru the threaded opening 2() which is to be connected by a pipe or hose to a. suitable source of water supply. Y

When the nozzle is to convey comminuted abrasive' material such as sand, granular stone, granite, those sections of the nozzle in which the stream approaches'its smaller end as sections 8 and 11 with linings 21 and 22, respectively. These linings mav have integral flanges 23 and `24:, respectively,

The fitting 5 is provided with a threaded 11 or the like, it is well to line which serve as packing rings -in the joints between thev able.`

opening by which to connect the nozzle to a hose or conduit for the material to he mixedvwithin the nozzle.

It is quite important to. have the nozzle sections of proper taper, especially the outwardly Haring section 9. If the angleof taper of section 9 be very much greater than the natural expansion of the stream, or as shown in the drawing, there will be accumulation of material in section 9, near the smaller end v16, from time to time, owing to a tendency to the formation of a vacuum at this point by the smaller flowing stream. The result is that this mass of accumulated mortar will be intermittently discharged from the end of the nozzle. producing an effect known as spitting which interrupts the uniform operation of the device and is very undesirable. If the angle be much less than five degrees, as shown, or less than the natural expansion of the stream, then the abrasive elect of the sand will be destructive to the metal-part of the section. This latter effect may, to an extent, he eliminated .by lining section 9 with a soft rubber liner, similar to the liners 21 and 22.

The liners, however, interpose more' resistance to the flowing stream`than desir- In sections- 8 and 11 wherein the streani is caused to be contracted they are practically necessary, as they serve as resilient surfaces to cause rebound of the more material components of the stream and assist greatly in the mixing operation.

When section 94conforms to an angley of about tive degrees, withy respect to its axis,

thestream will move in lines substantially' sections, each section having a uniformly l tapered bore, with alternate sections tapered in the samefdirection and arranged to contract and alternately expand a stream flowing therethrough; relatively soft linings for \said converging sections and a screw joint at each larger end of said contracted sections adapted for connection with another section.

In testimony whereof I hereunto subscribe my name. A A

JOHN v. SCHAEFER.

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