FI63529B - UTBYTBART MUNSTYCKE FOER BEVATTNINGSSPRIDARE TAECKANDE EN FULLCIRKEL ELLER EN DEL DAERAV - Google Patents

Description

ί i! I55r7 | γβΙ, «« advertisement publication, Ζ £ -οα LJ i11) utlAggn INOSSKRIFT 6352 9 C (45) Patent granted 11 07 1993 Patent meddelot (51) Kv.ik.Va3 B 05 B 1/00 // B 05 B 3/04 -, A 01 G 25/16 FINLAND — FINLAND (*) P «Mnttlh * k« nHM - PatwM * Meknin (783870 (22) HakemtopUvl - AMdknlng ^ ag 15.12.78 * * (23) Home - GHtlfh «ad« | 15.12.78 (41) Interpreters JulklMktl - Bllvtt effanclig 31.07.79 htMtti · It registihän itu · ««, L,, t _ '(44) NikttvUulpanon | «kuut | ulkaJ« in pm. - htwt · och roflataratyralaan' Amttkan utla «D och utUakrUtM pubUcaml 31.03.83 (32) (33) (31) * Jry4 *« r acuolkaus-eoUrd priori * · * 30.01.78 2U.0lt.78 USA (US) 873225, 899062 (71) Rain Bird Sprinkler MFG. Corp., 19233 East Foothill Boulevard,

Glendora, California, USA (72) John D. Beamer, West Covina, California, USA. . (7 * 0 Berggren Oy Ab (5 * 0 Interchangeable nozzle device for full or partial circular irrigation drills) the size and shape of the outlet of the sprinklers can be varied as desired.

As is well known in the art, it is highly desirable that special! sesti ns. the sprayer-type irrigation sprinkler is provided with a means by which the size and shape of the outlet of the sprinkler can be varied, so that the user of the sprinkler can vary the characteristics of the water flow sprayed by the sprinkler according to different seasonal requirements. For example, it may be desirable to adjust the flow rate of water sprayed by the grinder and the distribution of water over the throwing range of the grinder, or to increase the throwing range of the grinder when water is fed to the mower at relatively low pressures.

One way to achieve this is to use high-spray type winches) in which the winches have a series of interchangeable orifice rings that can be attached to the outlet end of a substantially frustoconical body mounted on the outlet pipe of the mower. These rings limit the outlet and reduce the flow rate in the rain! through. j

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63529

Another way to vary the shape of the outlet of such a grinder is to install in the outlet pipe of the grinder a body whose desired shape is made at its outlet end. For example, the desired shape may be a converging, truncated cone outlet that improves water distribution over a relatively short discharge area, or a relatively straight bore outlet that improves the discharge area of the mower when operated at a relatively low feed pressure.

Although these methods work satisfactorily, a separate unit comprising a body and an outlet must be used for each desired combination of size and shape if the shape and size of the outlet is to be varied. In addition, the bodies of all the nozzle arrangements described above are subject to strong abrasion of the water flowing through the sprinkler, which adversely affects their service life.

The cost of acquiring a separate nozzle comprising a body and an outlet for each desired combination of size and shape, added to the cost of periodic replacements of these nozzles, significantly increases the operating costs of the irrigation system.

In partial circular operation, the reaction-driven sprinkler is rotatably driven by a reaction arm in the first direction about a vertical axis in a manner known per se in the art. After the sprinkler is rotated through a preselected arc, the cam mechanism begins to move the reversing drive arm, placing the reversing spoon in the water stream sprayed from the sprinkler. The reaction force generated by the stream of water hitting the reversing spoon rotates the sprinkler in the opposite direction through the same preselected arc. At the other end of the arc, the cam mechanism moves the reversing spoon out of the water flow, and the sprinkler starts operating normally again in the first direction. One general type of sprinkler above is the Model 103 Rain Gun, manufactured by Rain Bird Sprinkler Mfg. Corp., Glendora, California.

If the reversing spoon moves too far into the current, the greater reaction force on the spoon can quickly rotate the sprinkler in the opposite direction, consuming more of the sprinkler and potentially damaging it. To avoid this, the reversing drive arms are provided with a means for adjusting the amount of reversal of the reversing spoon. Although the mechanism used for this purpose is working satisfactorily, the reversing drive arm must be readjusted to achieve the correct return speed of the mower 3 63529 each time the nozzle size is changed, as described above.

Therefore, there has been a need for a convenient and efficient device which varies in particular the size and shape of the outlet of a large spray type injector and which is relatively inexpensive to manufacture and whose body is not subject to abrasion of water flowing through the injector. In addition, there is a need for an above-mentioned type of sprinkler that includes a device connected to its reversing mechanism that automatically replaces nozzles of different sizes. As will be apparent from the following, the present invention satisfies these needs.

The present invention relates to a new and improved nozzle for use primarily in high-spray type irrigation mowers, which allows the size and shape of the vane outlet to be optionally varied by interchangeably storing a plurality of nozzle inserts in a single body attached to the vane outlet. When the nozzle according to the invention is used in partial round rakes, each inner part is adapted to cooperate with the reversing operating arm of the grinder, so that the operating position of the reversing spoon is automatically adjusted so that the grinder obtains the desired return rotation speed. In addition, the nozzle according to the present invention is relatively inexpensive to manufacture, trouble-free and reliable in use and achieves its advantageous result without the body being exposed to abrasion of the water flowing through the sprinkler.

The characteristic features of the replaceable nozzle device according to the invention are given in the appended claims.

More specifically, the nozzle of the present invention includes a body attached to the outlet end of the grinder and projecting outwardly from the grinder. All interchangeable nozzle inserts have the same external dimensions so that they fit equally into the body and are held firmly in place in the body by the same retaining ring. The inlet of each insert has a diameter corresponding to the diameter of the outlet end of the sprinkler, and the outlet of each insert can have any smaller diameter.

The inner wall of one set of inserts, which delimits the channel from the inlet to the outlet, may decrease uniformly in diameter through the insert, forming a converging, frustoconical surface that promotes rapid dispersion of the water stream sprayed from this insert. The inner wall of the second set of inserts may increase in diameter to 65529 evenly to the desired diameter, followed by a constant diameter area or a straight bore portion adjacent the outlet. This type of insert can be selected to increase the throw area compared to the area achieved with the above-mentioned truncated cone-shaped insert.

The inner wall of yet another set of inserts may gradually increase in diameter even less from the inner opening to the outlet and terminate in an asymptotic portion located substantially adjacent to the outlet. The flow of water flowing through such an insert gradually decreases in diameter and flows evenly into the asymptotic part of the insert just before it is sprayed out of the nozzle. The current is then highly collimated and results in a larger throw range when water is fed to the sprinkler at relatively low pressures.

When the insert is used in partial circular drills, there may be an axial portion adjacent to its outlet end that projects outwardly from the nozzle body. To limit the movement of the reversing spoon into the water stream sprayed from the grinder, the reversing drive arm may have an adjustable stop in a position where it abuts the protruding portion of the inner portion as the reversing spoon moves into the current. In this way, the operating position of the reversing spoon is automatically adjusted so that the mower receives substantially the same return rotation speed regardless of the size of the nozzle used.

Alternatively, the body can be adapted for use with conventional ring hole devices by placing an insert in the body to protect the body from wear and attaching the ring hole to the outlet end of the body using the same retaining ring used to secure other replaceable nozzle sets within the body. The spacer bag has an inlet diameter corresponding to the diameter of the outlet end of the sprinkler, and the inner diameter of the spacer decreases along its length to direct the flow of water through the nozzle toward the outlet of the ring opening. When this arrangement is used in connection with a partial circular trimmer, an axial part can be attached to the ring opening, which protrudes from the nozzle body and cooperates with the reversing drive arm as described above.

Other features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings, which illustrate the principles of the invention by way of example.

63529

Figure 1 is a perspective view of a nozzle device according to the present invention mounted on a conventional, reaction-operated large sprayer.

Fig. 2 shows the nozzle device according to the invention in an enlarged partial cross-sectional view, mainly along the line 2-2 in Fig. 1, the nozzle having a power nozzle-type insert.

Figure 3 is a perspective view of the insert shown in Figure 2. Figure 4 is a perspective view of a nozzle similar to that shown in Figure 3, but with a smaller outer diameter.

Fig. 5 shows the nozzle device according to the invention in an enlarged partial cross-sectional view, mainly along the line 2-2 in Fig. 1, the nozzle having a truncated cone-shaped insert.

Fig. 6 shows the nozzle device according to the invention in an enlarged partial cross-sectional view, mainly along the line 2-2 in Fig. 1, the nozzle having a straight-bore-type insert.

Fig. 7 shows the nozzle device according to the invention in an enlarged partial sectional view, mainly along the line 2-2 in Fig. 1, the nozzle having an intermediate insert used with a conventional ring opening. Figure 8 is a perspective view of an alternative embodiment of a nozzle device according to the invention mounted on a conventional reaction-driven high-speed sprayer.

Fig. 9 shows an enlarged partial view, partly in section, of a detail of the reversing drive arm structure and nozzle device of the grinder of Fig. 8.

Fig. 10 is an enlarged partial cross-sectional view similar to Fig. 9 of an annular orifice unit according to the invention adapted for use with a partial circular reamer.

As shown in the exemplary drawings, the present invention is used in a nozzle unit for use in an impact or reaction type irrigation sprayer shown in the drawings as a large reaction sprayer, generally indicated by reference numeral 10 in Fig. 1. In this case, the sprinkler 10 is mounted to rotate and includes a rotating bearing portion 14, a bend 16, and a directional tube 18 through which water passes to a nozzle, generally designated 20.

6 63529 During operation, water is discharged under pressure into the sprinkler 10 via a supply pipe 12. Water passes through the bend 16 and the guide tube 18 to the nozzle 20. The nozzle 20 sprays water up and out of the sprinkler 10, the throw distance being a function of the nozzle size, the water supply pressure to the sprinkler and the degree of collimation of the water stream sprayed from the nozzle.

For use with the mower 10, the reaction arm 22 is mounted to rotate about the horizontal axis of the pin 24 projecting from the protrusion 26 of the guide tube 18. At one end of the arm 22 there is an inner drainage portion 28 and an outer drainage portion 30 and at its other end a counterweight 32.

During operation of the mower 10, the dewatering portions 28 and 30 periodically enter the water stream sprayed from the nozzle 20 and deflect the water stream portion to the side. The reaction to the force required to deflect the water is directed to the protrusion 26 via the arm 22, whereby the rotational movement of the sprinkler 10 is accelerated. The operation of the reaction arm 22 using the reamer 10 is known in the art and need not be explained in detail here.

When the grinder is used for partial circle operation, as best seen in Figure 8, the grinder 10 'includes a reversing drive arm 80. The partial circle grinder shown in Figures 8-10 is substantially similar to the grinder shown above in connection with Figure 1. The parts of the grinder according to Figures 8 to 10, which essentially correspond in structure and function to the parts of the grinder according to Figure 1, are denoted by corresponding reference numerals with throwing marks.

During operation of the partial circular trimmer 10 ', the drive arm 22' drives the trimmer 10 'through a preselected arc in the same manner as described above in connection with the circular trimmer 10 of Figure 1. To hold the mower 10 'within the preselected arc, the reversing arm 80 is adapted to return the mower 10' back through the preselected arc, after which the drive arm 22 'begins to operate again to rotate the mower forward.

/ 7 63529 For this purpose, a reversing arm 80 is also mounted to rotate about a horizontal axis of a pin 24 'attached to the protrusion 26' of the directional tube 18 '. The reversing tube 80 is located above and substantially parallel to the nozzle 20 ', and has a reversing spoon 82 at its outermost end.

When the reversing spoon 82 is lowered into the water stream sprayed from the nozzle 20 ', the reaction force generated by the water impinging on the spoon 82 acts on the sprinkler 10' via the reversing arm 80 and the protrusion 26 'to rotate the sprinkler 10' in the opposite direction until the spoon 82 exits.

The downwardly directed crank 84 is mounted to rotate together with the reversing drive arm to rotate said arm about the pin 24 ', whereby the reversing spoon 82 is moved from the nozzle 20' into and out of the sprayed water stream. Attached to the lower end of the palm 84 is a pivot rod 86 extending along the guide tube 18 'and pivotally attached at one end to the upper corner 88 of the substantially triangular plate 90. The plate 20 is pivotally attached to the bend 16' from its lower front corner 92. A roller-type cam follower 96 is arranged in the lower rear corner 94 of the triangular plate 90, which is moved up and down by the cam surfaces 98 and 100, respectively. Surfaces 98 and 100 are formed on two cam brackets 102 and 104 attached to the detachable flange 105 so that the brackets 102 and 104 can be located at any circumferential position of the flange 105.

When the mechanism is used to move the spoon 82 into and out of the sprayed nozzle 20 'while the drive arm 22' rotates the sprinkler 10 'toward the end of the preselected arc, the cam pin 10' moves the cam follower 96 downwardly by rotating the triangular plate 90 counterclockwise. The rotary rod 86 is then pulled inwardly away from the nozzle 20 ', thereby rotating the crank 84 clockwise and moving the spoon 82 upstream. With the spoon 82 in the current, the spur 10 'rotates in the opposite direction back through the preselected arc until the cam surface 98 moves the cam follower 96 upward. The upward movement of the follower 96 rotates the plate 90 clockwise, with the pivot rod 86 moving outward toward the nozzle 20 ', the crank 84 rotating counterclockwise, and the spoon 82 exiting power so that the sprinkler 10' can move to normal forward rotation under the drive arm 22 '.

63529

According to the present invention, the nozzle 20 of the grinder 10 includes means for optionally varying the size and shape of the grinder outlet, wherein a plurality of nozzle inserts 34 are alternately stored in a single nozzle 20 body 36 attached to the outlet end of the guide tube 18. In addition, each insole portion, when used in conjunction with sub-circular projectors, is adapted to cooperate with the reversing reversing drive arm 80 of the squeegee so that the operating position of the reversing spoon 82 is automatically adjusted to give the squeegee the desired return speed regardless of the size of the insertion used.

In addition, the manufacture of the nozzle 20 of the present invention is quite inexpensive, is trouble-free and reliable in use, and the body 36 of the nozzle 20 is not subject to abrasion caused by water flowing through the injector 10.

In order to conveniently vary the size and shape of the sink outlet, the nozzle 20 comprises a single body 36 adapted to receive any set of inserts 34. As will be explained in more detail below, the inserts may have any desired shape and may provide the squeegee 10 with a desired size outlet. which is smaller than the outlet end of the guide tube 18. In order to prolong the life of the nozzle 20, the inner parts can be conveniently and economically compressed from a wear-resistant polyurethane material.

For the above purposes, the nozzle 20 consists essentially of a cylindrical body 36 threadedly positioned on the outlet end of the directional tube 18 from which it protrudes. The inner portion 34 is held within the body 36 by a ring 38 threadedly attached to the outer end of the body 36 and including inwardly extending portions 40 which abut the shoulder of the inner portion 34 so that the inner portion 34 remains within the body 36 and form the water seal guide tube 18 outlet end and inner portion 34. between.

The directional tube 18 has an inner passage 44 through which water flows from the sprinkler 10 to the nozzle 20. The inner portion 34 has an inlet 46 and an outlet 48 for receiving and spraying water as it flows through the nozzle 20. In order for the inner part * .. 34 to evenly receive the water flow flowing through the channel 44, it is placed in the body 63529 36 so that the inlet 46 abuts the outlet end of the guide tube 18, and the inner diameter of the inlet 46 is substantially equal to the inner diameter of the channel 44 at the outlet end.

The inner portion 34 includes an inner wall 50 defining a passage 52 extending through the inner portion 34 from the inlet 46 to the outlet 48. As shown in Figure 2, the inner wall 50 converges toward the center of the inner portion 34, and the degree of convergence of the inner wall 50 gradually decreases along the length of the inner portion 34 from the inlet 46 to the outlet 48. outlet 48. the aseptic part 54 of the channel 52 is formed nearby. The asymptotic part 54 is almost parallel to the axis of the inner part 34 and therefore forms a substantially straight discharge part.

The inner portion 34, which has an inner wall 50 that gives the channel 52 any shape, can be interchangeably placed in the body 36 by removing the retaining ring 38, pulling the inner portion 34 out of the outer end of the body 36, and placing a new inner part 34 having the desired shape in the nozzle 20. As can be seen most clearly in Figures 3 and 4, the inner portion 34 is provided with longitudinal ribs 56 extending from a point near the inlet 46 toward the outlet 48 and forming a shoulder 42 at the end. To hold the inner part 34 firmly in place within the body 36, each rib 56 has an outer surface 58 which is adapted to rest on the inner surface of the body 36. All inserts 34 are provided with ribs 56 having surfaces 58 that cooperate with the inner surface 60 of the body 36 so that each insert 34 fits equally into the same body 36. However, different interchangeable inserts 34 may have different diameter outlets 48 for changing the flow rate of water sprayed from the sprinkler .

As best seen in Figures 5 and 6, the inner portion 34 'may have an inner wall 50' defining a channel 52 ', which may have any desired shape. In these examples, the nozzle 20 'is substantially similar to the nozzles shown in Figures 1-4. The parts of the nozzles 5 and 6 which are substantially similar in structure and function to those discussed above in connection with Figures 1 to 4 are denoted by the same reference numerals. It should be noted that the guide tube 18, the body 36 and the retaining ring 38 are not denoted by the reference numerals because these parts are similar to those shown in Figs. 1-4.

10 63529

As best seen in Figure 5, the inner portion 34 'has an inlet 46' having an inner diameter substantially equal to the inner diameter of the channel 44 at the outlet end of the guide tube 18, and the wall 50 'converges uniformly toward the center of the inner portion 34' until the wall 50 'defines the channel 52'. with the desired diameter. Thereafter, the wall 50 'remains unchanged, so that a drilling portion 61 is formed next to the outlet opening 48'.

The nozzle 20 can also be adapted for use with conventional ring hole devices. As best seen in Figure 7, the insert portion 62, which may also be extruded from a wear-resistant polyurethane material, is located within the body 36 and abuts the inner wall 60 of the body 36. The ring 38 holds the end of the inner portion 62 of a conventional opening ring 64 with a drain 66 against. The inner portion 62 has an inlet 68 having an inner diameter substantially equal to the inner diameter of the channel 44 at the outlet end of the guide tube 18, and an outlet 70 having an inner diameter larger than the diameter of the outlet 66 of the orifice ring 64. The orifice ring 64 can be replaced with another orifice ring 64 having a different diameter outlet 66, allowing the user to vary the flow rate of water sprayed by the mower 10 at will.

According to an alternative embodiment of the invention adapted for use with a partial circular reamer 10 'as shown in Figure 8, the nozzle 20' is provided with an inner portion 34 'having an axial portion 106 adjacent the outlet 48' projecting from the nozzle body 36 '. The outer diameter of the axially extending portion 106 is smaller than the inner diameter of the body 36 '. The inner portion 34 'is held in place within the body 36' by the sauna as shown in connection with the reamer of Figures 1-7. That is, the ring 38 'holds the insert portion 34' within the body 36 ', with its inlet 46' abutting the outlet end of the guide tube 18 '.

To limit the movement of the reversing spoon 82 into the water flow sprayed from the sprinkler 10 ', the restrictor 108 must be adjusted to a position of the reversing drive arm 80 where it abuts the protruding portion 106 of the insert 34' when the reversing spoon 82 is moved into the stream. As best seen in Figure 9, the adjustable abutment 108 includes an externally threaded shaft 110 having a substantially flat end 112 at its lower end that abuts the outer surface 114 of the protruding portion 107. The shaft 110 is disposed in a threaded hole within the protrusion 116 formed in the reversing drive arm 113529. At the upper end of the shaft there is an open slot 118 which receives a screwdriver blade (not shown). A screwdriver can be used to position the stop 108 adjustable to any desired position relative to the protrusion 116.

In this arrangement, the position of the stop 108 determines the extent to which the reversing spoon 82 is energized. Therefore, the spoon 82 moves the same distance into the current regardless of the size of the outlet 48 'of the insert 34' used. Furthermore, it will be appreciated that any size or shape of the inner portion 34 'may be used, such as the sizes and shapes described above in connection with Figures 2-6, in conjunction with the protruding portion 106 to provide automatic adjustment of the reversing spoon 82, as described above.

When the nozzle 20 'is adapted for use with conventional ring orifice devices, it can further be adapted to automatically adjust the operating position of the reversing spoon 82, as best seen in Figure 10. In this case, the nozzle 20' is assembled in the same manner as described above in Figure 7. has an inner portion 62 and an opening ring 64 'held by the ring 38' inside the body 36 '. However, the orifice ring 64 'is provided with an axial tubular extension 120 adapted to protrude out of the nozzle 20'. The outer diameter of the tubular extension 120 is smaller than the inner diameter of the body 36. To this end, the tubular extension 120, which is preferably made of stainless steel, includes a radially projecting flange 122 attached to the orifice ring 64 'by any suitable means, such as spot welding. In this way, the tubular extension 120 can be adapted to cooperate with the adjustable stop 108, thereby automatically adjusting the return speed of the sprinkler 10 'regardless of the selected size of the orifice ring 64'.

It should be noted that each inner portion 34, 34 'and 62 effectively isolates the body 36 from the water flow flowing through the nozzle 20. In this way, the service life of the body 36 is considerably extended, and the abrasion effect of the water flowing through the nozzle 20 affects only the inner parts 34, 34 'and 62, which are preferably made of a compressible, wear-resistant polyurethane material. Furthermore, the threaded connection between the body 36 of the guide tube 18 is not subject to abrasion caused by sand or sludge impurities because the body 36 is not required to be removed from the guide tube 18 for replacement of the inner portion 34. If the threaded connection between the body 36 and the ring 38 ever happens to become unusable due to sand or sludge impurities, it is considerably cheaper to replace the body 36 and the ring 38 than the guide tube 18, which is usually welded to the bend 16.

It will be appreciated from the foregoing that the nozzle 20 of the present invention is a device that allows the size and shape of the irrigation outlet to be optionally varied to achieve the desired combination of flow rate and dispenser distribution or throw area. In addition, the nozzle 20 can be conveniently and economically manufactured, includes a long-life body, and can be adapted to automatically adjust the return rotation speed of the reaction-driven sub-circular drill.

Although specific embodiments of the invention have been shown and described above, it will be apparent that various modifications may be made without departing from the spirit and scope of the invention.

Claims (8)

A replaceable nozzle device intended to be used in such an irrigation sprayer having a water outlet opening and comprising; an elongated tubular housing (36), the interior of which is generally cylindrical hollow and secured to the water outlet end of a water outlet tube (18) and extending leaking therefrom, characterized in that the nozzle device also comprises several interchangeable insert portions (34) various bores and equal axial lengths which extend over the entire axial length of the housing (36) and are disposed against the water outlet end (52) of the water outlet tube (18) and whose inner diameter of the inlet opening (46) is substantially equal to the inner diameter of the water outlet tube (18). ) the water outlet end and the inner diameter of the outlet opening (48) is smaller than the inner diameter of the inlet opening (46); and a removable device (38) for holding the insert portion (34) within the housing (36) such that the insert portion (34) can be interchangeably replaced with a second insert portion (34) of different diameter of the outlet opening (48). Device according to claim 1, characterized in that the insert part (34) hears an inner wall, which forms a channel (52 ') which converges towards the center of the insert part stepwise less than before from the inlet opening (46) to the outlet opening (48), wherein the inner wall ends in a straight bore portion (54) adjacent the outlet opening. Device according to claim 1, characterized in that the insert part (34) hears an inner wall (50 ') which limits said channel and which has an internal diameter, which evenly decreases from the inlet opening (46') to the outlet opening (48 *) - Device according to claim 3, characterized in that an opening ring (64) located between the outlet opening (48) and the retaining member (38) is further used, the diameter of the inner opening (66) being smaller than the diameter of the outlet opening. Device according to Claim 1, characterized in that the insert part (34) has an inner wall (50 ') which limits said channel (52') and which has an inner diameter which decreases evenly from the inlet opening to the outlet opening to a point where the inner wall limits a predetermined internal diameter (61), wherein