US2043714A - Duplex nozzle construction - Google Patents

Description

June 9, 1936. J. c. SCHELLIN 2,043,714

DUPLEX NOZZLE CONSTRUCTION 2 Sheets-Shae t 1 Filed Sept. 27, 1935 June 9, 1936- J. c. SCHEL LIN DUPLEX NQZZLE CONSTRUCTION Filed Sept. 2"], 1935 2 Sheets-Sheet 2 Patented in... e, 193

PATENT OFFICE,

nurmx'nozzna coNs-raoc'non' j mm c. mun. Wm, om, allignor'tothe Manufacturing AkronBr-ale I ter, Ohio, a corporation of Ohio pany, Woos- Appllcatlon September 3'', 1935, Serial No. 42,527

The invention relates generally to nomles for breaking up and discharging fluid media in such fine particlesas to form a cone of dense fog or vapor, such nozzles being of the-type described and claimed in my prior Patent No. 1,998,884 entitled Fog-producing nozzle. More particularly, the invention relates to nozzles for discharging a fog or vapor and a straight stream of high velocity, either separately or simultaneously; and subject matter disclosed but not claimed herein has been made the subject 7 of my copending application Serial No. 5,957, filed February 11, 1935, and entitled Nozzle construc- 7 tion. 1 Where the straight stream nomle is formed within the vapor nozzle, as in my copending application, the dimensions of the straight stream nozzle are accordingly restricted, particularly as to length; so as to limit the velocity of the stream and consequently the distance to which it can be thrown.

In using a straight stream nozzle for extinguishing fires, it is usually desirable and often necessary to provide a stream of high'velocity 5 which can be thrown amaximum distance.

I have discovered that excellent results are obtained by arranging the straight stream nozzle and the vapor nozzle in duplex fashion, one along side the other on the same fluid supply line and 30 providing improved single valve means for selec-,

tivelycontrolling both nozzles.

Moreover, certain types of flres, for example, deep oil reservoir fires. generate such intense heat and provide such a vast supply of combustible 35 material, as not to be effectively extinguished by a fog or vapor nozzle such as-disclosed in my prior patent, because the depth of the oil is such that when the. cone of extinguishing vapor is moved across the surface of the burning oil, the

40 intense heat reignites the area which has been previously extinguished.

I. havediscovered a novel vapor nozzle con-'- struction and arrangement which provides for discharging a coneof fog or vapor surroimding 45 a smaller and more penetrating cone of fog 'or vapor, and the two concentric cones of vapor act to efl'ectively extinguish large volumes ofburning combustible material, such as large deep reservoirs of oil.

-50 Accordingly, it is an object or the present invention to provide an improved duplex nomle construction for connection to a single fluid pressure line, and having a relatively long straight stream nozzle-and a vapor nozzle. 55 Another object is to provide improved single valve means for selectively controlling. both nozzles. I

A further object is to provide an improved vapor nozzle for simultaneously discharging two cones of vapor. one within' the other.

A still further object is to provide an improved nozzle for a fluid pressure line, adapted for-use in extinguishing substantially all kinds of flres of various sizes, as well as for any use where it is desired to discharge fluid particles in the form 10. of a stream of high velocity, or a vapor, or both.

These and other objects are accomplished by theparts, elements, improvements. novel combinations and arrangements comprising the present invention, which are, hereinafter described in 15- detail and defined in the'appended claims.v In general terms, the improved duplex nozzle may be stated as including a housing adapted for connection toa fluldpressure line, a straight stream nozzle communicating with said housing, a double vapor nozzle; communicating with said housing, and a novel 'valve for selectively con-l trolling the flow of fluid to both nozzles.

In the drawings forming part hereof Figure 1 is a view'partly in section and partly as in elevation of the improved duplex nozzle, showing the valve in position to permit fluid flow simultaneously to the stream nozzle and the vapor nozzle; I g

Fig. 2 is a fragmentary sectional view similar to Fig. 1', showing the valve in position to permit fluid flow to the vapor nozzle alone;

Fig. 3 is a similar fragmentary sectional view showing the valve in position to permit flow to the stream nozzle alone;

Fig. 4 is a fragmentary 'elevational view of the housing for the novel valve;

Fig. 5 is a fragmentary transverse sectional view thereof as on line 5-5, Fig. 4;

Fig. 6 is an enlarged sectional view of the im proved vapor nozzle forming part of the duplex nozzle shown in Fig. 1;

Fig. 7 is a transverse sectional view as on line- 'l-|,-Fig. 6;

Fig. 8 is a transverse sectionalview as on line 8-8, Fig. 6;

Fig. 9 is a view partly in section and partly inelevation of the duplex nozzle, taken at rightangles to the view in Fig. 1; e

Fig. 10 is a fragmentary sectional view as on line ill -ll, Fig. 9; and Fig. 11 is a fragmentary sectional view through one of the rotors and" one of the ports supplying pressure fluid thereto. p t5 to similar "parts or pressure fluid line it is screwed in the usual manner, as shown.

Directly opposite the inlet ii, the housing i2 is preferably provided with a tubular externally threaded connection portion is which is adapted to have screwed thereon the female connection It of a straight stream nozzle 57, a gasket i8 being provided between the connection portions .for sealing the same. A rubber guard ring ila may be provided on the end of nozzle H for protecting the same. 7

The tubular connection it is provided with an axial bore or fluid outlet passage is extending therethrough and communciating at its outer end with the tapered bore 28 of the nozzle H. The inner end of the passage is communicates with a preferably cylindrical valve chamber 2! formed by the walls of the housing i2, and the inlet portion It has an axial here or fluid passage 22 aligned with the fluid passage 59 and communi-- eating at its inner end with the valve her 2!.

Thus, pressure fluid entering through the supply line it has a. straight flow through passages 22, it and it, for discharging out of the nozzle member It, which passages provide a straight stream nozzle of sumcient length to discharge a stream of relatively high velocity, so that the same may be thrown a considerable distance.

The housing i2 is also preferably provided with atubular conduit 23 having an internal fluid passage 2Q communicating with the chamber 26 opposite theinlet portion i3 and adjacent to the connection l5, and the conduit 23 may be pro-.

vided with an angular bend 25 followed by a straight portion 25 substantially parallel with the stream nozzle member it.

The upper end of the straight portion 28 of the conduit may be enlarged as shown to form a cupshaped portion 21 for mounting the improved vapor nozzle H thereon in a position substantially parallel to the stream nozzle ill.

The improved valve means for selectively controlling the flow to the stream nozzle and the vapor nozzle, preferably includes a cylindrical valve body 30 which may be of metal or hard rubber and the like, and is shown in the drawings as hard rubber. The valve body 30 is preferably rotatably journalled in a softrubber sleeve or lining 3| secured to thein'side of the housing 2!. In order to facilitate assembly, the soft rubber lining 3! may be first molded with a thin sheet metal covering 82, and then forced into the valve chamber 2| with a press-fit, so that the soft rubber lining 3| is frictionally held to the housing walls The lining 3| is provided with ports l9 and 24', registering respectively, with the passage it leading to the stream nozzle and the conduit 24 leading to the'vapor nozzle; and the lining 3| is also provided with a port 22' registering with the inlet passage 22.

g is at the mark "V.

The rotatable valve body 30 isprovided with a wide substantially quarter-circle opening 34 for communicating with the inlet port 22' in various positions of the valve, and extending into the center of-the valve body. From the inner end of the opening 34, two passages 35 and 38 extend through the valve body in an opposite direction for communicating with the ports l9 and 24'. The means for rotating the valve body to various positions may include a valve stem 31 (Fig. 9) which has at its inner end a key 38 slidably inserted in'a slot-39 formed in the valve body, and the usual packing means are indicated at 49 for providing a seal between the stem and the housing closure plate I20. .The outer end M of the stem may have one arm of a valve operating handle :32 secured thereon, and in this embodiment the handle 42 is shownasbeing U.-shaped and having its other arm swiveled on a stud 43 provided on the opposite side of the housing ii.

The outer surface l-Zb of the housing i2 adjacent the stud 53 may be provided with suitable markings for indicating the position of the' valve body he relative to the position of the handle 52, as shown in Fig; 4. At each position of the valve handle required for flow of the nozzles, the outer surface itb of the housing I? may be provided with a depression or spherical recess 64, and the handle his provided with a spring pressed ball 65 for entering any one of the recesses as to yieldingly maintain the handle in the desired position.

When the valve body 30 is in the position shown in Fig. 1, the handle 62 is in the position of Fig. 4 at the marl; VS", and'the valve is open to both the stream nozzle it and the vapor nozzle Ii. t is, the valve opening 36 and passages 35 and 28 provide communication between the inlet passage 22 and passages it and 26, simultaneously. In the position of Fig. 3, the opening at and passage ttprovide communication between the passage 22' and passage It, to open the stream nozzle it, the valve body acting to close off thevapor nozzle pasa'ge it. In this position, the valve handle $2 is at the mark S.

In the position of Fig. 2 the opening 3 and passage 85 provide communication between the inlet passage 22' and the vapor nozzle passage 2 3, the-valve body acting to close 011 the passage is. In this position, the valve'handle 43 Further movement of the valve body in a clockwisedirection as viewed in Fig. 2 will close off both the passages 59 and 24 and bring the han die 62 to the position marked "0if' in Fig. 4. Preferably, stops at are provided on the housing for abutting the handle 42 in the "S" and "01? positions.

The improved valve provides a straight through passage to and through the stream nozzle when the nozzle it is open alone or simultaneously with the vapornozzle II. In the position of Fig. 1 the opening 84 and passage 35 provide a straight through passage leading to the streain' nozzlawhen the nozzle l0 and vapor nozzle H are opened simultaneously. In the position of Fig. 3, the opening 34 and passage 38 provide a straight through passage to the stream nozzle when it is open alone with the vapor nozzle closed. This provides for reducing frictional properly controlling the pressure seal for the valve body 34, so that the 7S valve is eflectively sealed against any leakage in each of its four positions, and at the same time the valve body is easily rotated inthe lining, be-

cause the pressure fluid flowing through the valve acts as a lubricant between the valve body and the lining. 1

As indicated in Figs. 9 and 10, the key slot 89 is-positioned in the valve body so as to be at right angles to the longitudinal axis of the inlet passage 22 when the valve is in fully open or VS j position, with the result that the key slot 88 is parallel with the inlet passage 22 when thevalve is in fully closed or Off position. This permits the fluid pressure to move the valve body 38 slightly to compress the resilient lining 3| sufand a gasket 5| being inserted between the ShOUlr der 5!! and the threaded end 49 to seal the connection therebetween. 'The upper or outer end of the dome 48 is provided with a discharge aperture 52, which may beoutwardly flared as shown, and the dome 48 provides a discharge chamber C1 communicating with the passage 24 of conduit 26, and from which fluid particles may be discharged out of the aperture 52.

At the lower end of the dome 48, a transverse partition wall 54 is provided, being preferably screwed into the threaded upper end 48 of portion 21, and the partition wall is preferably provided with a rearwardly extending tubular portion 55 providing a fluid passage 56 through the partition wall coaxial with the passage 24. The fluid passage 56 is preferably internally threaded and a conduit 51 screwed therein and projecting forwardly therefrom. A cup-shaped member 58 is screwed upon the upper end of the conduit 51 and the upper threaded end 59 of the cup-shaped member 56 has screwed thereon a dome-shaped member 68, which has an outwardly flared discharge aperture 6| formed axially of an annular projection 62 located within and concentric with the discharge aperture 52, and the projection 62 forms an annular discharge aperture within discharge'aperture 52.

The dome-shaped member 60 provides a discharge chamber C2 concentric with and inside of the discharge chamber C1 formed by the dome 48, and the passage 56 and conduit 51. provide communication between said chamber C: and the conduit 26 which communicates with the fluid supply line.

A transverse partition wall 68 is provided at the lower end of the dome'68, being screwed in end 59 of member 58 similar to the way transverse partition wall 54 is screwed in member 21, and a forwardly projecting solid rod 64 is preferably screwed therein so as to project forwardly therefrom axially of the dome and extend through the discharge aperture 6|, thus providing an annular discharge aperture around the rod 64.

A rotor 65 is'rotatably journalled on the con-' nalled upon the rod 68 immediately in front of the partition wall 62, by means of a suitable bearing 68, which in this case may be of graphite because of the small size bearing required. The rotors 65 and 61 are otherwise identical except as to size. I

Each partition wall 54 and 62 is provided-with 5 circumferentially arranged rearwardly projecting tubular portions 18 providing ports 1| through the partition walls for directing fluid against the undersides of the rotors, the ports 1| being preferably angularly disposed in order 10 that fluid passing therethrough will impinge upon the blades 12 of the rotors for rotating the same.

As best shown in Figs. 7 to 11, the blades 12 I of the rotors-are formed so as to provide angular ports 13 therebetween for discharging the 15 fluid particles outwardly and upwardly from the rotors. 7 Thus, the rotors 65 and 61 are coaxial and rotatably mounted one behind the other, and one. in each of the concentric chambers C1 and C2, the rotor 65 being adapted to direct fluid particles toward the discharge aperture 52, and the rotor '61 being adapted to direct fluid particles toward the discharge aperture 6|.

Preferably, the partition wall 54 is spaced forwardly of the discharge end of fluid supply passage 24, so that a chamber 15 is formed within cup-shaped portion 21 behind the partition wall 54. In the same way, the partition wall 68 is spaced forwardly of the discharge end of conduit 51 so as to provide a chamber 16 behind the partition wall and communicating with the'condit 51.

Thus as fluid under pressure enters the chamber 15, the heavier particles of foreign-material in the fluid are forced against the rear of the partition wall 54 beyond the entrances to the ports 1| and the conduit 51, which entrances are spaced rearwardly of the partition wall. The greater proportion of the fluid which passes 40 through these ports has to back up before enter-e ing the same, and is thus substantially rid of the heavier foreign material before it strikes the blades of the rotors.

In the same manner, fluid passing through conduit 51 to chamber 16 has any heavy particles of foreign. matter therein forced against the rear side of partition wall 63, so as to substantially prevent said particles from passing through the ports 1| and striking the blades of rotor 61.

Moreover, if any particles of lightweight material are contained in the fluid flowing from passage 24, which particles may pass through the ports 1| in the partition walls54 and 68; said particles tend to become lodged between the for- 55 ward sides of the partition walls andthe adjacent rotor blades, with the result that the rapidly rotating blades serve to grind said particles into such small size that their presence becomes negligible. When the valve 30 is in the position of Fig. l or Fig. 2, to supply pressure fluid to the improved vapor nozzle ll, fluid passes through ports 1| of partition wall 54 to rotor and rapidly rotates the same. flne particles which are discharged through the rotor ports 18 and whirled outwardly against the sides of dome 48, passingupwardly between dome 48 and dome 60 and discharging from aperture 52 around projection 62 inthe form of a hollow whirling cone of vapor or fog indicated at V1.

Fluid also passes through ports 1| of partition wall 68 torotor 61 to become broken up into fine particles which are whirled outwardly and upwardly in chamber Ca and discharged from lper- 16 The rotor breaks up the fluid into 5 and directing them into said discharge chamber ture ii around rod Bl in the form of a hollow whirling cone of vapor or fog indicated at V2, inside of and concentric with the vapor cone V1.

Since both rotors are fed by the common supply passage 24, and rotor S'i is much lighter in weight and smaller radially than rotor 55; rotor 51' will rotate the more rapidly, with the-result that the fluid particlesin chamber C: are extremely fine and the inside cone of vapor V:-

is more dense and more penetrating than the vapor V1. 7

In the operation of the improved duplex nozzle, where it is desired to produce a straight stream of maximum length, the valve is turned to the.

position "S" of Fig, 3 for discharging a straight stream from the nozzle '97, as indicated at S in Fig. 1.

In extinguishing a certain type of fire, such as a burning mass of relatively light material, where it is desirable to use both a stream to penetrate the mass and a vapor to extinguish the fire at the.

surface, the valve is turned to the position VS" of Fig. 1, for discharging a straight stream S and vapor V1 and V2, simultaneously.

In extinguishing fires providing a vast supply of combustible material, such as deep oil reservoir flres,'the valve is turned to the V position of Fig. 2 to direct all of the fluid into'the vapor nozzle and produce concentric cones of vapor V1 and V: of maximum density. It has been found that the improved double vapor nozzle ii acts to extinguish this type of fire with maximum effectiveness because the inner cone V2 penetrates below the surface fire, separating the fire from the liquid underneath, and the outer cone forms a protective air-excluding blanket for the inner cone, eliminating flash backs as the nomle is moved across the surface since the temperature has been lowered by the inner conesufilciently to enable the outer cone to maintain the temperature of the mass below the combustion point;

so that the two cones cooperate to permanently.

smother the fire.

The present improved duplex nozzle provides an all-purpose nozzle which may be used not only for extinguishing all types of fires, but equally well forspraying vegetation, breaking up latex .rubber, breaking up salt in an aerating process,

or in connection with any pressure fluid line where a'spray of vapor or both are desired.

1 claim:

1. Nozzle construction including walls forming a discharge chamber having a' discharge aperture, a rotor for breaking up fluid into particles tor being discharged from said discharge aperture as a cone of vapor. walls forming a second.

7 apertures, a rotorin. each chamber-for breaking up fluid into particles and directing the particles into the chambers for being discharged as con her behind the rotor therein, walls forming an centric cones of vapor, and a conduit for supplying pressure fluid to both rotors, whereby the. inner rotor is rotatedat a. higher speed than the outer rotor.

3. Nozzle construction including walls forming concentric chambers having concentric discharge apertures, a rotor in each chamber for breaking up fluid into particles and directing them into said chambers for being discharged as concentric cones of vapor, a conduit for supplying pressure 10 fluid to both rotors, and means for directing said pressure fluid against the rotors for rotating the same, whereby the inner rotor is rotated at a higher speed than the outer rotor.

4. Nozzle construction including walls forming concentric chambers having concentric discharge apertures, a rotor in each chamber for breaking up fluid into particles and directing said particles toward said discharge apertures, .a transverse partition wall in each chamber behind the rotor therein, and a conduit for directing pressure fluid against both partition walls, there being ports in the partition walls for directing fluid against the rotors.

5. Nozzle construction including walls forming concentric chambers having concentric discharge apertures, a rotor in each chamber for breaking up fluid into particles and directing said particles toward said discharge apertures, a transverse partition wall in each chamber behind the rotor therein, a conduit for directing pressure fluid against both partition walls, and tubular walls projecting rearwardly from. each partition wall and forming ports therethrough for directing fluid against the rotors.

6. Nozzle construction including walls forming a chamber having a discharge aperture at one end, a rotor rotatably mounted in said chamber, a transverse partition wall behind said rotor at the other end of said chamber, means for directing pressure fluid against the rear side of said partition wall, and tubular wallsprojecting rearwardly from said partition wall and forming ports therethrough for directing fluid against the rotor.

' '7. Nozzle construction including walls forming concentric chambers having concentric discharge apertures, coaxial rotors rotatably mounted one behind the other and one in each chamber for breaking up fluid into particles, each rotor being adapted for directing fluid particles toward the discharge aperture of the chamber in which it is located for being discharged in the form of vapor, a transverse partition wall in each cham axial fluid passage through the rear partition wall and leading to the rear side of the front partition wall, and means for conducting pressure fluid to said rear partition wall, said partition walls being provided with rearwardly pro- Jecting tubular portions forming ports there-- through for directing fluid against the rotors.

' fluid into particles and discharging said particles some (2.

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