US2439539A - Valve for spray bars - Google Patents

Description

W. E. CELLWORK VALVE FOR SPRAY BARS April 13, 194s.

Filed Deo. 18, 1944 www m. lllllllw .IH- .WMM MM,

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Patented Apr. 13, 1948 N UNITED STATES PATENT y OFFICE .ausser "vaLvE rotiinar Baas William E. Cellwork, Kansas City, Mo., assignmto Standard Steel Works, Kansas City, Mo., a corporation of Missouri Application December 18, 1944. Serial No. 568.610

3Claims. 1

This invention relates to spray bars for distributing machines and particularly to the spray nozzles thereof through'which a bituminous or like material is discharged onto a roadway, the principal objects being to provide a spray bar and nozzles of simple, inexpensive, and relatively light weight construction; to provide a structure requirlng ,few threading and tapping operations in the production thereof; to provide a valve and nozzle assembly that is readily removed `from the spray bar for inspection and repair or for replacement with a new assembly; and to provides structure wherein the valve assemblies are,

readily connected and adjusted for simultaneous operation.

Other objects of the invention are to provide a valve structure having a tapered valve head, and a relatively large area retained in sealing contact with a tapered seat in the valve body by a spring located within the flow passage between the point of cutoff and the outlet of the spray nozzle so that the valve is leak-tight and in case it is necessary to apply heat for melting any of the material that solidifles within the bar or valves, the spring is heated no hotter than the material contained in the passageway.

It is also a prime object of the invention to provide a valve structure having a substantially short flow passage from the'point of cutoff to the outlet of the spray nozzle, thereby reducing possibility oi material congealing therein and to avoid dripping of material after the valve is closed.

In accomplishing these and other objects of the invention, I have provided improved structure, the preferred form of which is illustrated in the accompanying drawing wherein:

Fig. l is a perspective view of a section of a spray bar equipped with valve and nozzle assemblies embodying the features of the present invention.

Fig. 2 is an enlarged perspective view of a fragmentary section of the spray bar and showing the spray nozzle and valve assembly in position for application to the spray bar. 1

Fig. 3 is a cross section through the spray bar at the point of one of the valve and spray nozzle assemblies.

Fig. 4 is a cross section through the valve assembly. y

Referring more in detail to the drawing:

l designates an end of a fixed section of a spray bar such as used on a distributing machine and 2 designates the adjacent swing section that is connected to the xed section by a hinge joint 55 3. The sections of the spray bar each include joints of tubing I suitably connected together to form spray bar sections of the desired length, the tubes 4 having inner tubes 5 supported therein at one side of the horizontal center thereof and which are adapted for interconnection when the tubes are connected together by the joints 6 whereby the spray bar is provided with flow passageways 1 and 8 through which a material to be distributed is circulated throughout the length of the spray bar sections and returned so as to maintain the material in the spray bar in fluid condition and effect heating of the parts thereof by the hot material under circulation. The spray bar units composing the respective sections are provided in the upper and lower sides thereof with openings 9 and I0 formed through the wall of the outer tubes as best shown in Figs. 2 and 3 for accommodating valve and spray nozzle units` II through which the circulated material is disy charged from the distributor bar in spray form when the valves of the assemblies are opened.

Each assembly includes a valve body I2 having a tapered tubular barrel portion I3 for rotatably mountingthe stem of the valving member later described. The valve body also includes a flaring portion I 4 at the lower end of the barrel and which has a tapering bore I5 coaxial with the bore IU of the barrel as shown in Fig. 3. Formed exteriorly of the flared portion of the valve body at'the larger end thereof is an annular flange I1 having an upper face I 8 conforming tothe contour of the underside of the spray bar units surrounding the openings III. The flange I1 seats thereon a gasket washer I 9 to form a seal between the flange I1 and the spray bar unit in which the valve assemblies are installed. The barrel is of suiilcient length to project through the opening 9 and the projecting end 20 is externally threaded to mount a janib or draw nut 2| thereon. Sleeved on the projecting end of the barrel under the draw nut is a washer 22 having an underface 23 conforming-in contour to the upper side of the bar unit to accommodate a gasket 24 similar to the gasket I8 previously mentioned. The lower end of the flaring portion I 4 of the valve body terminates in a neck 2li having a counterbore 25 cooperating with the enlarged end of the tapered bore to form an annular shoulder 21. The neck 25 is provided with external threads 281 to engage 'threads 20 on a union nut 30 which cooperates with the shoulder 21 to retain a spraynozzle ll later described.

Rotatably mounted within the valve bodies are valving members 82 having heads Il tapered in accordance with the tapered bores of the valve bodies whereby the tapering surfaces 34 thereof are adapted to sealingly contact the surface ofl the tapering portions I to effect seals therebetween. The valving members also include stems 35 coaxial with the heads 33 and of a size to be freely rotatable within the bores I6 of the barrel portionsof the valve bodies. The stems are of suftlcient length to project beyond the outer ends of the threaded portions of the barrels and are suitably shaped as at 36 to mount the hubs 31 of laterally extending operating levers 38 whereby the valve stems may be oscillated within the valve bodies. The flaring portion of the valves have ports 39 extending through the walls thereof and preferably elongated in the axial'direction of the valve assembly as shown in Fig. 4, through which material in the passageway l is adapted to flow when ports 48. in the valve heads are moved into registration therewith. The ports 40 form the inlets to L- shaped ducts 4| which open downwardly through the lower ends of the tapered heads and connect with counterbores 42 which form annular seats 43 for springs 44. The nozzles previously mentioned ,comprise cylindrical bodies y45 having flange-like portions 46 and cylindrical necks '41, the necks being projected through openings 48 in the union nuts so that the union nuts clamp the flanged portions of the nozzles against the annular shoulders 21 to retain the nozzles from rotation. The spray nozzle bodies have axial bores 49 through which material to lie distributed is discharged through slot-like ports 50 extending transversely across the neck portions 3| as shown in Fig. 3. The nozzles 49 have counterbores 5I at their opposite ends to cooperate with the counterbores `42 for accommodating the valve seating springs 46 which retains'the tapered valve heads in sealing contact with the tapering surface of the valve bodies so as to prevent leakage therebetween and assure iiow of material from the ports 39 to the ports 4I when the valving members are moved to discharge material to the spray nozzles.

It will thus be noted that the springs are located' within the relatively short passageway laetween the points of cuto and the outlets of valve nozzles so that should it become necessary to apply heat to the bar for melting any material y congealed in the bar therein, the springs can become no hotter than the material in the passageways whichl contain the springs. Therefore, possible injury to the springs is avoided and the springs retain their original tension necessary to maintain proper sealing contact of the tapered surface.

The arms 38 of the valves are connected by a series of links 52 whereby all the valves of the spray bar are simultaneously operated. 'I'he links 52 for each hinge section are in two parts 53 and 54 which are connected by turn buckles 56 whereby the positions of the arms 38 of the valves may be adjusted relative to each other.

The links 52 are reciprocated by a rod 51 having pivotal connections 58 at the axis of the hinge joints 3 `with a rod 59 adjustably mounted in ears 68 depending from the adjacent links of the hinge sections, the rod being threaded and provided with adjusting nuts 6I and 62 engaging the respective sides of one of. the ears. By adjusting the nuts, the point of cutoiI relatively to the inlet ports of the valves may be regulated so that the sprays operate simultaneously.

In assembling the parts of a valve unit, the

stem of the valving member is passed through the barrel so that the head thereon engages the tapered bore of the valve body. The spring -is then inserted in' the counterbore 42, after which the nozzle 3| is inserted into the valve body to engage the shoulder 21, the lower end of the spring being received inl the counterbore 46 of thenozzle. The union nut 38 is then applied and afterA adjusting the direction of the slot-like port, the union nut is tightened to clamp the nozzle in adjusted position.

In assembling the valve in one of the bar sections, ,the gasket ring I9 is sleeved over the barrel I3 of the valve body to seat on the ange l1. The'barrel of the valve body is-then inserted through the large opening I8 into the tube 4 and through the small opening 9 so that the threaded end projects therefrom. The gasket |24 is then applied over the threaded end of the barrel followed by the washer 22 and Upon tightening of the nut 2|, the gaskets I9 and 24 are pressed against the tubing to effect a fluid-tight seal. After application ofthe valve units, the lever arms 33 are applied to the shaped ends 36 of the valve stems and the arms are connected by the links 52. The links of the swing sections are then connected by the turn buckle and the arms adjusted so that they all extend in the same direction. The'actuating bar |51 is then connected and the nuts 68 and 6| adjusted to provide the desired degree of cutoff for the valves.

In operating the valves, shifting of the connected links swing the valve arms to move the valving members so that the ports 40 are carried from a position out of alignment with the ports 39 to a yposition in alignment therewith so that passageways are opened from the interior of the spray Ibar to the nozzles and wherethrough the liquid is discharged under pressure in spray form through the slots 50. The position of the slots 5|) may be adjusted to locate the sprays for desired coverage by loosening the union nuts and turning the nozzles 3| therein after which the nuts are retightened.

From the foregoing, it is obvious that I have provided a spray bar and nozzle unit which results in a simple and inexpensive, light weight construction and which requires a minimum of threading and welding operations.

It is also obvious that I have provided a valve and nozzle assembly that is readily removed from the spray bar for inspection or repair or, when required, replacement with a new assembly.

It is also obvious that the operating levers of the valves are all readily connected and are adjustable for simultaneous operation of al1 the sprays.

What I claim and desire to secure by Letters Patent is:

1. In an apparatus of the character described, a substantially cylindrical tubular member through which a liquid is to be circulated and having differential sized openings in opposite walls thereof, a valve housing extending through said openings and having a. tapered valve chamber with the base thereof closing the larger of said openings, said valve housing having a bore coaxial with said chamber, an annular flange on the valve housing at the base of said chamber and encircling the larger of said openings and having curvature to conform with the curvature of the tubular member to seat the flange and prevent rotation of the valve housing in said openings, a, washer sleeved on the housing and encircling the smaller of said openings, said washer also being curved to conform with the tubular member, gaskets between the washer and tubular member and between the tubular member and said ilange and encircling the openings on the outer sides of said members, a nut having threaded connection with the valve housing` and engaging the washer to draw said gaskets into sealing contact with the sides of the' tubular member While the valve housing and washer are prevented from turning by said curved engagement with the tubular member to eiect seals between the valve housing and the tubular member, a valve member having a ta.- pered head in the tapered valve chamber and having a shank oscillatably mounted in the coaxial bore, and means having connection with the valve housing on the exterior side of said iiange for retaining the valve member in the valve housing.

2. In an apparatus of the character described, a substantially. cylindrical tubular member through which a liquid is to be circulated and having openings in opposite walls thereof, a valve housing extending through said openings and having an axial bore, an annular ilange on the valve housing encircling one of said openings and having curvature to conform with the curvature of the tubular member to seat the flange and prevent rotation oi the valve housing in said openings, a washer sleeved on the end of the housing extending through the other of said openings, said washer also being curved to conform to the tubular member, gaskets between the tubular member and washer and the tubular member and said flange to seal said openings, a nut having threaded connection with the valve housing and engaging the washer to draw said gaskets into sealing contact with the sides o1' the tubular member while the valve housing and washer are prevented from turning by said curved engagement with the tubul-ar member, a valve member having a shank oscillatably extending through the axial bore and projecting from the end of the valve housing which carries the washer, an arm iixed to the stem for oscillating the valve member, and means having connection with the valve housing on the exterior side of said annular flange for retaining the valve member in the valve housa'. In an apparatus cr the character described, a substantially cylindrical tubular member -through which a liquid is to be circulated and having differential sized openings in opposite walls thereof, a valve housing extending through said openings and having a tapered valve chamber with the base thereof 'closing the larger of said openings, said valve housing having a bore coaxial with sai-d chamber, an annular ange on the valve housing at the base of said chamber and encircling the larger of said openings and having curvature to conform with the curvature of the tubular member to seat the ange and prevent rotation of the valve housing in said openings, a washer sleeved on the housing and encircling the smaller of said openings, said washer also being curved to conform to the tubular member, a nut having threaded connection with the valve housing and engaging the washer to tighten the valve housing in the tubular member while the valve housing and washer are prevented from turning by said curved engagement' with the tubular member, a valve member having a. head in the tapered valve chamber and having a shank oscillatably extending through the axial bore and projecting from the end of the valve housing which extends through the smaller opening, an arm fixed to the stem for oscillating the valve member, and means having connection with the valve housing on the exterior side of said annular ange i'or retaining the valve member in the valve housing.

WILLIAM E. `CELLWORK.

REFERENCES CITED The following references are of record in the file of this patent;

UNITED STATES PATENTS

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